diff --git a/Makefile.am b/Makefile.am
index 698adb4bd0cb5c1452a2f9c0bb1cb5d778b2b087..b5947e5183537efb291f3219e3fddd8018d1ec9e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-SUBDIRS = exosip2 utilspp stund src ringtones m4
+SUBDIRS = exosip2 portaudio utilspp stund src ringtones m4
EXTRA_DIST = tools/*.sh
ACLOCAL_FLAGS=-I$(top_srcdir)/m4
diff --git a/config.h.in b/config.h.in
index 8af0e482645c6582485745eb15002a3f8dba89a4..f5524364d5765b0ba111c4f69bbc5257be5b68a5 100644
--- a/config.h.in
+++ b/config.h.in
@@ -21,6 +21,9 @@
/* Define to 1 if you have the `osipparser2' library (-losipparser2). */
#undef HAVE_LIBOSIPPARSER2
+/* Define to 1 if you have the `pthread' library (-lpthread). */
+#undef HAVE_LIBPTHREAD
+
/* Define to 1 if you have the <malloc.h> header file. */
#undef HAVE_MALLOC_H
@@ -30,9 +33,6 @@
/* Define to 1 if you have the <ostream> header file. */
#undef HAVE_OSTREAM
-/* Define to 1 if you have the <portaudio.h> header file. */
-#undef HAVE_PORTAUDIO_H
-
/* Define if you have POSIX threads libraries and header files. */
#undef HAVE_PTHREAD
@@ -102,12 +102,34 @@
/* Define to the version of this package. */
#undef PACKAGE_VERSION
+/* Alsa */
+#undef PA_USE_ALSA
+
+/* Jack */
+#undef PA_USE_JACK
+
+/* OSS */
+#undef PA_USE_OSS
+
/* Define to the necessary symbol if this constant uses a non-standard name on
your system. */
#undef PTHREAD_CREATE_JOINABLE
+/* The size of a `int', as computed by sizeof. */
+#undef SIZEOF_INT
+
+/* The size of a `long', as computed by sizeof. */
+#undef SIZEOF_LONG
+
+/* The size of a `short', as computed by sizeof. */
+#undef SIZEOF_SHORT
+
/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS
/* Version number of package */
#undef VERSION
+
+/* Define to 1 if your processor stores words with the most significant byte
+ first (like Motorola and SPARC, unlike Intel and VAX). */
+#undef WORDS_BIGENDIAN
diff --git a/configure.ac b/configure.ac
index 4a09a029a4fd9458bb5c725fc9ba1e9201dda604..8b149a2a329b993522b091167bc143f5c574f18a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -34,6 +34,15 @@ AM_INIT_AUTOMAKE(sflphoned, $VERSION)
AC_PROG_LIBTOOL
dnl AC_CHECK_COMPILERS
+dnl check for portaudio
+LP_SETUP_PORTAUDIO
+
+dnl check for osip2
+LP_CHECK_OSIP2
+
+dnl setup flags for embedded exosip library
+LP_SETUP_EXOSIP
+
CXXFLAGS="$CXXFLAGS $USE_EXCEPTIONS"
SFLPHONE_CXXFLAGS=""
@@ -53,9 +62,9 @@ dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS( \
ostream \
-portaudio.h \
)
+
LIBCCGNU2_MIN_VERSION=1.3.1
PKG_CHECK_MODULES(libccgnu2, libccgnu2 >= ${LIBCCGNU2_MIN_VERSION})
SFLPHONE_CXXFLAGS="$SFLPHONE_CXXFLAGS $libccgnu2_CFLAGS"
@@ -71,11 +80,6 @@ PKG_CHECK_MODULES(libccrtp1, libccrtp1 >= ${LIBCCRT_MIN_VERSION})
SFLPHONE_CXXFLAGS="$SFLPHONE_CXXFLAGS $libccrtp1_CFLAGS"
SFLPHONE_LIBS="$SFLPHONE_LIBS $libccrtp1_LIBS"
-dnl check for osip2
-LP_CHECK_OSIP2
-
-dnl setup flags for embedded exosip library
-LP_SETUP_EXOSIP
SFLPHONE_CXXFLAGS="$SFLPHONE_CXXFLAGS $OSIP_CFLAGS"
SFLPHONE_LIBS="$SFLPHONE_LIBS $OSIP_LIBS"
@@ -83,18 +87,6 @@ SFLPHONE_CXXFLAGS="$SFLPHONE_CXXFLAGS $EXOSIP_CFLAGS"
SFLPHONE_LIBS="$SFLPHONE_LIBS $EXOSIP_LIBS"
-if test $ac_cv_header_portaudio_h = no; then
- AC_MSG_ERROR([*** missing portaudio.h. You need a working PortAudio installation. See http://www.portaudio.com])
-else
- portaudio_LIBS="-lportaudio -lasound "
- portaudio_CFLAGS="-DAUDIO_PORTAUDIO "
-fi
-
-SFLPHONE_LIBS="$SFLPHONE_LIBS $portaudio_LIBS"
-SFLPHONE_CXXFLAGS=="$SFLPHONE_CXXFLAGS $portaudio_CFLAGS"
-AC_SUBST(portaudio_CFLAGS)
-AC_SUBST(portaudio_LIB)
-
AC_SUBST(SFLPHONE_CXXFLAGS)
AC_SUBST(SFLPHONE_LIBS)
@@ -142,6 +134,7 @@ sflphoned-fedora.spec \
Makefile \
m4/Makefile \
exosip2/Makefile \
+portaudio/Makefile \
src/Makefile \
src/sflphone \
src/audio/Makefile \
diff --git a/exosip2/Makefile.am b/exosip2/Makefile.am
index a3ef5a35dc7ce2dbed2370ed16f7053baf5b5e87..9000c6ca5d9507f4adb578b924689f059a368bf0 100644
--- a/exosip2/Makefile.am
+++ b/exosip2/Makefile.am
@@ -1,6 +1,6 @@
-lib_LTLIBRARIES = libeXosip2.la
+noinst_LTLIBRARIES = libeXosip2.la
#
# Other flags to add someday:
@@ -9,7 +9,7 @@ lib_LTLIBRARIES = libeXosip2.la
# -Wstrict-prototypes
# -Werror
#
-AM_CFLAGS = @EXOSIP_CFLAGS@ @CFLAGS@
+AM_CFLAGS = $(EXOSIP_CFLAGS) @CFLAGS@
libeXosip2_la_SOURCES = \
eXosip.c eXconf.c \
@@ -27,7 +27,6 @@ misc.c eXosip2.h \
jpipe.c jpipe.h jauth.c \
sdp_offans.c jpublish.c
-libeXosip2_la_LDFLAGS = -L$(prefix)/lib -version-info $(LIBEXOSIP_SO_VERSION)
-libeXosip2_la_LIBADD = -losip2 @EXOSIP_LIBS@
+libeXosip2_la_LIBADD = -losip2 @EXOSIP_LIBS@
INCLUDES = -I$(top_srcdir) -I$(top_srcdir)/include -I$(includedir)
diff --git a/m4/exosip.m4 b/m4/exosip.m4
index b412e1c22c464d3fa9adc927829a681024ac0c1f..c074386b0bcf27558e5ccf826d659330ce0c8c97 100644
--- a/m4/exosip.m4
+++ b/m4/exosip.m4
@@ -2,23 +2,6 @@ AC_DEFUN([LP_SETUP_EXOSIP],[
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([LP_CHECK_OSIP2])
-dnl *********************************************************************
-dnl Source packaging numbers
-EXOSIP_MAJOR_VERSION=1
-EXOSIP_MINOR_VERSION=9
-EXOSIP_MICRO_VERSION=1
-
-SONAME_MAJOR_VERSION=5
-SONAME_MINOR_VERSION=0
-SONAME_MICRO_VERSION=0
-
-dnl program extension
-EXOSIP_VERSION=$EXOSIP_MAJOR_VERSION.$EXOSIP_MINOR_VERSION.$EXOSIP_MICRO_VERSION
-LIBEXOSIP_SO_VERSION=$SONAME_MAJOR_VERSION:$SONAME_MINOR_VERSION:$SONAME_MICRO_VERSION
-
-AC_SUBST(LIBEXOSIP_SO_VERSION)
-AC_SUBST(EXOSIP_VERSION)
-
dnl support for linux-thread or posix thread (pthread.h)
AC_ARG_ENABLE(pthread,
[ --enable-pthread enable support for POSIX threads. (autodetect)],
diff --git a/m4/portaudio.m4 b/m4/portaudio.m4
new file mode 100644
index 0000000000000000000000000000000000000000..0d290382d1cdbb9c459886209e8165a1e03bf65f
--- /dev/null
+++ b/m4/portaudio.m4
@@ -0,0 +1,118 @@
+AC_DEFUN([LP_SETUP_PORTAUDIO],[
+AC_REQUIRE([AC_CANONICAL_HOST])
+
+CFLAGS_save=$CFLAGS
+LIBS_save=$LIBS
+CXXFLAGS_save=$CXXFLAGS
+
+AC_ARG_WITH(alsa,
+ [ --with-alsa (default=yes)],
+ with_alsa=$withval, with_alsa="yes")
+
+AC_ARG_WITH(jack,
+ [ --with-jack (default=yes)],
+ with_jack=$withval, with_jack="yes")
+
+AC_ARG_WITH(oss,
+ [ --with-oss (default=yes)],
+ with_oss=$withval, with_oss="yes")
+
+AC_ARG_WITH(host_os,
+ [ --with-host_os (no default)],
+ host_os=$withval)
+
+AC_ARG_WITH(winapi,
+ [ --with-winapi ((wmme/directx/asio) default=wmme)],
+ with_winapi=$withval, with_winapi="wmme")
+
+dnl Mac API added for ASIO, can have other api's listed
+AC_ARG_WITH(macapi,
+ [ --with-macapi ((asio/core/sm) default=core)],
+ with_macapi=$withval, with_macapi="core")
+
+AC_ARG_WITH(asiodir,
+ [ --with-asiodir (default=/usr/local/asiosdk2)],
+ with_asiodir=$withval, with_asiodir="/usr/local/asiosdk2")
+
+AC_ARG_WITH(dxdir,
+ [ --with-dxdir (default=/usr/local/dx7sdk)],
+ with_dxdir=$withval, with_dxdir="/usr/local/dx7sdk")
+
+dnl This must be one of the first tests we do or it will fail...
+AC_C_BIGENDIAN
+
+dnl checks for various host APIs and arguments to configure that
+dnl turn them on or off
+AC_CHECK_LIB(asound, snd_pcm_open, have_alsa=yes, have_alsa=no)
+
+PKG_CHECK_MODULES(JACK, jack, have_jack=yes, have_jack=no)
+
+dnl sizeof checks: we will need a 16-bit and a 32-bit type
+
+AC_CHECK_SIZEOF(short)
+AC_CHECK_SIZEOF(int)
+AC_CHECK_SIZEOF(long)
+
+dnl extra variables
+AC_SUBST(PADLL)
+AC_SUBST(SHARED_FLAGS)
+AC_SUBST(DLL_LIBS)
+AC_SUBST(CXXFLAGS)
+AC_SUBST(NASM)
+AC_SUBST(NASMOPT)
+
+AC_SUBST(PORTAUDIO_CFLAGS)
+AC_SUBST(PORTAUDIO_CXXFLAGS)
+AC_SUBST(PORTAUDIO_LIBS)
+
+CFLAGS="-g -O2 -Wall -pedantic -pipe -fPIC"
+
+if test x$ac_cv_c_bigendian = xyes ; then
+ CFLAGS="$CFLAGS -DPA_BIG_ENDIAN"
+else
+ CFLAGS="$CFLAGS -DPA_LITTLE_ENDIAN"
+fi
+
+dnl Unix configuration
+AC_CHECK_LIB(pthread, pthread_create,,AC_MSG_ERROR([libpthread not found!]))
+
+if [[ $have_alsa = "yes" ] && [ $with_alsa != "no" ]] ; then
+compile_with_alsa=yes
+LIBS="$LIBS -lasound"
+DLL_LIBS="$DLL_LIBS -lasound"
+AC_DEFINE(PA_USE_ALSA, [], [Alsa])
+fi
+AM_CONDITIONAL(ENABLE_ALSA, test x$compile_with_alsa = xyes)
+
+
+if [[ $have_jack = "yes" ] && [ $with_jack != "no" ]] ; then
+compile_with_jack=yes
+LIBS="$LIBS $JACK_LIBS"
+DLL_LIBS="$DLL_LIBS $JACK_LIBS"
+CFLAGS="$CFLAGS $JACK_CFLAGS"
+AC_DEFINE(PA_USE_JACK, [], [Jack])
+fi
+AM_CONDITIONAL(ENABLE_JACK, test x$compile_with_jack = xyes)
+
+if [[ $with_oss != "no" ]] ; then
+compile_with_oss=yes
+AC_DEFINE(PA_USE_OSS, [], [OSS])
+fi
+AM_CONDITIONAL(ENABLE_OSS, test x$compile_with_oss = xyes)
+
+LIBS="$LIBS -lm -lpthread";
+AM_CONDITIONAL(ENABLE_UNIX, true)
+
+PORTAUDIO_CFLAGS=$CFLAGS
+PORTAUDIO_LIBS=$LIBS
+PORTAUDIO_CXXFLAGS=$CXXFLAGS
+
+
+CFLAGS=$CFLAGS_save
+LIBS=$LIBS_save
+CXXFLAGS=$CXXFLAGS_save
+
+AC_SUBST(OTHER_SOURCES, $OTHER_SOURCES)
+
+])
+
diff --git a/portaudio/Makefile.am b/portaudio/Makefile.am
new file mode 100644
index 0000000000000000000000000000000000000000..f9b7d7cde48abd512ee9dd13267fbeaacc03e364
--- /dev/null
+++ b/portaudio/Makefile.am
@@ -0,0 +1,41 @@
+
+noinst_LTLIBRARIES = libportaudio.la
+libportaudio_la_CFLAGS = $(PORTAUDIO_CFLAGS)
+libportaudio_la_LIBS = $(PORTAUDIO_LIBS)
+libportaudio_la_CXXFLAGS = $(PORTAUDIO_CXXFLAGS)
+libportaudio_la_CPPFLAGS = $(PORTAUDIO_CPPFLAGS) -Ipa_common/
+
+pkginclude_HEADERS = pa_common/portaudio.h
+
+
+if ENABLE_OSS
+OSS=pa_unix_oss/pa_unix_oss.c
+endif
+
+if ENABLE_UNIX
+UNIX=pa_unix/pa_unix_hostapis.c pa_unix/pa_unix_util.c
+endif
+
+if ENABLE_JACK
+JACK=pa_jack/pa_jack.c
+endif
+
+if ENABLE_ALSA
+ALSA=pa_linux_alsa/pa_linux_alsa.c
+endif
+
+
+SOURCES=${OSS} ${UNIX} ${JACK} ${ALSA}
+
+
+libportaudio_la_SOURCES = ${SOURCES} \
+ pa_common/pa_allocation.c \
+ pa_common/pa_converters.c \
+ pa_common/pa_cpuload.c \
+ pa_common/pa_dither.c \
+ pa_common/pa_front.c \
+ pa_common/pa_process.c \
+ pa_common/pa_skeleton.c \
+ pa_common/pa_stream.c \
+ pa_common/pa_trace.c
+
diff --git a/portaudio/pa_common/pa_allocation.c b/portaudio/pa_common/pa_allocation.c
new file mode 100644
index 0000000000000000000000000000000000000000..98239c48f00400932a826763f1b87c39cacabc0a
--- /dev/null
+++ b/portaudio/pa_common/pa_allocation.c
@@ -0,0 +1,234 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library allocation group implementation
+ * memory allocation group for tracking allocation groups
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Allocation Group implementation.
+*/
+
+
+#include "pa_allocation.h"
+#include "pa_util.h"
+
+
+/*
+ Maintain 3 singly linked lists...
+ linkBlocks: the buffers used to allocate the links
+ spareLinks: links available for use in the allocations list
+ allocations: the buffers currently allocated using PaUtil_ContextAllocateMemory()
+
+ Link block size is doubled every time new links are allocated.
+*/
+
+
+#define PA_INITIAL_LINK_COUNT_ 16
+
+struct PaUtilAllocationGroupLink
+{
+ struct PaUtilAllocationGroupLink *next;
+ void *buffer;
+};
+
+/*
+ Allocate a block of links. The first link will have it's buffer member
+ pointing to the block, and it's next member set to <nextBlock>. The remaining
+ links will have NULL buffer members, and each link will point to
+ the next link except the last, which will point to <nextSpare>
+*/
+static struct PaUtilAllocationGroupLink *AllocateLinks( long count,
+ struct PaUtilAllocationGroupLink *nextBlock,
+ struct PaUtilAllocationGroupLink *nextSpare )
+{
+ struct PaUtilAllocationGroupLink *result;
+ int i;
+
+ result = (struct PaUtilAllocationGroupLink *)PaUtil_AllocateMemory(
+ sizeof(struct PaUtilAllocationGroupLink) * count );
+ if( result )
+ {
+ /* the block link */
+ result[0].buffer = result;
+ result[0].next = nextBlock;
+
+ /* the spare links */
+ for( i=1; i<count; ++i )
+ {
+ result[i].buffer = 0;
+ result[i].next = &result[i+1];
+ }
+ result[count-1].next = nextSpare;
+ }
+
+ return result;
+}
+
+
+PaUtilAllocationGroup* PaUtil_CreateAllocationGroup( void )
+{
+ PaUtilAllocationGroup* result = 0;
+ struct PaUtilAllocationGroupLink *links;
+
+
+ links = AllocateLinks( PA_INITIAL_LINK_COUNT_, 0, 0 );
+ if( links != 0 )
+ {
+ result = (PaUtilAllocationGroup*)PaUtil_AllocateMemory( sizeof(PaUtilAllocationGroup) );
+ if( result )
+ {
+ result->linkCount = PA_INITIAL_LINK_COUNT_;
+ result->linkBlocks = &links[0];
+ result->spareLinks = &links[1];
+ result->allocations = 0;
+ }
+ else
+ {
+ PaUtil_FreeMemory( links );
+ }
+ }
+
+ return result;
+}
+
+
+void PaUtil_DestroyAllocationGroup( PaUtilAllocationGroup* group )
+{
+ struct PaUtilAllocationGroupLink *current = group->linkBlocks;
+ struct PaUtilAllocationGroupLink *next;
+
+ while( current )
+ {
+ next = current->next;
+ PaUtil_FreeMemory( current->buffer );
+ current = next;
+ }
+
+ PaUtil_FreeMemory( group );
+}
+
+
+void* PaUtil_GroupAllocateMemory( PaUtilAllocationGroup* group, long size )
+{
+ struct PaUtilAllocationGroupLink *links, *link;
+ void *result = 0;
+
+ /* allocate more links if necessary */
+ if( !group->spareLinks )
+ {
+ /* double the link count on each block allocation */
+ links = AllocateLinks( group->linkCount, group->linkBlocks, group->spareLinks );
+ if( links )
+ {
+ group->linkCount += group->linkCount;
+ group->linkBlocks = &links[0];
+ group->spareLinks = &links[1];
+ }
+ }
+
+ if( group->spareLinks )
+ {
+ result = PaUtil_AllocateMemory( size );
+ if( result )
+ {
+ link = group->spareLinks;
+ group->spareLinks = link->next;
+
+ link->buffer = result;
+ link->next = group->allocations;
+
+ group->allocations = link;
+ }
+ }
+
+ return result;
+}
+
+
+void PaUtil_GroupFreeMemory( PaUtilAllocationGroup* group, void *buffer )
+{
+ struct PaUtilAllocationGroupLink *current = group->allocations;
+ struct PaUtilAllocationGroupLink *previous = 0;
+
+ if( buffer == 0 )
+ return;
+
+ /* find the right link and remove it */
+ while( current )
+ {
+ if( current->buffer == buffer )
+ {
+ if( previous )
+ {
+ previous->next = current->next;
+ }
+ else
+ {
+ group->allocations = current->next;
+ }
+
+ current->buffer = 0;
+ current->next = group->spareLinks;
+ group->spareLinks = current;
+
+ break;
+ }
+
+ previous = current;
+ current = current->next;
+ }
+
+ PaUtil_FreeMemory( buffer ); /* free the memory whether we found it in the list or not */
+}
+
+
+void PaUtil_FreeAllAllocations( PaUtilAllocationGroup* group )
+{
+ struct PaUtilAllocationGroupLink *current = group->allocations;
+ struct PaUtilAllocationGroupLink *previous = 0;
+
+ /* free all buffers in the allocations list */
+ while( current )
+ {
+ PaUtil_FreeMemory( current->buffer );
+ current->buffer = 0;
+
+ previous = current;
+ current = current->next;
+ }
+
+ /* link the former allocations list onto the front of the spareLinks list */
+ if( previous )
+ {
+ previous->next = group->spareLinks;
+ group->spareLinks = group->allocations;
+ group->allocations = 0;
+ }
+}
+
diff --git a/portaudio/pa_common/pa_allocation.h b/portaudio/pa_common/pa_allocation.h
new file mode 100644
index 0000000000000000000000000000000000000000..5bcfe75a67674da671de89962c866b6fc5c46285
--- /dev/null
+++ b/portaudio/pa_common/pa_allocation.h
@@ -0,0 +1,95 @@
+#ifndef PA_ALLOCATION_H
+#define PA_ALLOCATION_H
+/*
+ * $Id$
+ * Portable Audio I/O Library allocation context header
+ * memory allocation context for tracking allocation groups
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Allocation Group prototypes. An Allocation Group makes it easy to
+ allocate multiple blocks of memory and free them all simultanously.
+
+ An allocation group is useful for keeping track of multiple blocks
+ of memory which are allocated at the same time (such as during initialization)
+ and need to be deallocated at the same time. The allocation group maintains
+ a list of allocated blocks, and can deallocate them all simultaneously which
+ can be usefull for cleaning up after a partially initialized object fails.
+
+ The allocation group implementation is built on top of the lower
+ level allocation functions defined in pa_util.h
+*/
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+typedef struct
+{
+ long linkCount;
+ struct PaUtilAllocationGroupLink *linkBlocks;
+ struct PaUtilAllocationGroupLink *spareLinks;
+ struct PaUtilAllocationGroupLink *allocations;
+}PaUtilAllocationGroup;
+
+
+
+/** Create an allocation group.
+*/
+PaUtilAllocationGroup* PaUtil_CreateAllocationGroup( void );
+
+/** Destroy an allocation group, but not the memory allocated through the group.
+*/
+void PaUtil_DestroyAllocationGroup( PaUtilAllocationGroup* group );
+
+/** Allocate a block of memory though an allocation group.
+*/
+void* PaUtil_GroupAllocateMemory( PaUtilAllocationGroup* group, long size );
+
+/** Free a block of memory that was previously allocated though an allocation
+ group. Calling this function is a relatively time consuming operation.
+ Under normal circumstances clients should call PaUtil_FreeAllAllocations to
+ free all allocated blocks simultaneously.
+ @see PaUtil_FreeAllAllocations
+*/
+void PaUtil_GroupFreeMemory( PaUtilAllocationGroup* group, void *buffer );
+
+/** Free all blocks of memory which have been allocated through the allocation
+ group. This function doesn't destroy the group itself.
+*/
+void PaUtil_FreeAllAllocations( PaUtilAllocationGroup* group );
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_ALLOCATION_H */
diff --git a/portaudio/pa_common/pa_converters.c b/portaudio/pa_common/pa_converters.c
new file mode 100644
index 0000000000000000000000000000000000000000..39f83e481943297ad8bc67edd21712487d316a9d
--- /dev/null
+++ b/portaudio/pa_common/pa_converters.c
@@ -0,0 +1,1926 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library sample conversion mechanism
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Phil Burk, Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Conversion functions implementations.
+
+ If the C9x function lrintf() is available, define PA_USE_C99_LRINTF to use it
+
+ @todo Consider whether functions which dither but don't clip should exist,
+ V18 automatically enabled clipping whenever dithering was selected. Perhaps
+ we should do the same.
+
+ @todo implement the converters marked IMPLEMENT ME: Float32_To_UInt8_Dither,
+ Float32_To_UInt8_Clip, Float32_To_UInt8_DitherClip, Int32_To_Int24_Dither,
+ Int32_To_UInt8_Dither, Int24_To_Int16_Dither, Int24_To_Int8_Dither,
+ Int24_To_UInt8_Dither, Int16_To_Int8_Dither, Int16_To_UInt8_Dither,
+
+ @todo review the converters marked REVIEW: Float32_To_Int32,
+ Float32_To_Int32_Dither, Float32_To_Int32_Clip, Float32_To_Int32_DitherClip,
+ Int32_To_Int16_Dither, Int32_To_Int8_Dither, Int16_To_Int32
+*/
+
+
+#include "pa_converters.h"
+#include "pa_dither.h"
+#include "pa_endianness.h"
+#include "pa_types.h"
+
+
+PaSampleFormat PaUtil_SelectClosestAvailableFormat(
+ PaSampleFormat availableFormats, PaSampleFormat format )
+{
+ PaSampleFormat result;
+
+ format &= ~paNonInterleaved;
+ availableFormats &= ~paNonInterleaved;
+
+ if( (format & availableFormats) == 0 )
+ {
+ /* NOTE: this code depends on the sample format constants being in
+ descending order of quality - ie best quality is 0
+ FIXME: should write an assert which checks that all of the
+ known constants conform to that requirement.
+ */
+
+ if( format != 0x01 )
+ {
+ /* scan for better formats */
+ result = format;
+ do
+ {
+ result >>= 1;
+ }
+ while( (result & availableFormats) == 0 && result != 0 );
+ }
+ else
+ {
+ result = 0;
+ }
+
+ if( result == 0 ){
+ /* scan for worse formats */
+ result = format;
+ do
+ {
+ result <<= 1;
+ }
+ while( (result & availableFormats) == 0 && result != paCustomFormat );
+
+ if( (result & availableFormats) == 0 )
+ result = paSampleFormatNotSupported;
+ }
+
+ }else{
+ result = format;
+ }
+
+ return result;
+}
+
+/* -------------------------------------------------------------------------- */
+
+#define PA_SELECT_FORMAT_( format, float32, int32, int24, int16, int8, uint8 ) \
+ switch( format & ~paNonInterleaved ){ \
+ case paFloat32: \
+ float32 \
+ case paInt32: \
+ int32 \
+ case paInt24: \
+ int24 \
+ case paInt16: \
+ int16 \
+ case paInt8: \
+ int8 \
+ case paUInt8: \
+ uint8 \
+ default: return 0; \
+ }
+
+/* -------------------------------------------------------------------------- */
+
+#define PA_SELECT_CONVERTER_DITHER_CLIP_( flags, source, destination ) \
+ if( flags & paClipOff ){ /* no clip */ \
+ if( flags & paDitherOff ){ /* no dither */ \
+ return paConverters. source ## _To_ ## destination; \
+ }else{ /* dither */ \
+ return paConverters. source ## _To_ ## destination ## _Dither; \
+ } \
+ }else{ /* clip */ \
+ if( flags & paDitherOff ){ /* no dither */ \
+ return paConverters. source ## _To_ ## destination ## _Clip; \
+ }else{ /* dither */ \
+ return paConverters. source ## _To_ ## destination ## _DitherClip; \
+ } \
+ }
+
+/* -------------------------------------------------------------------------- */
+
+#define PA_SELECT_CONVERTER_DITHER_( flags, source, destination ) \
+ if( flags & paDitherOff ){ /* no dither */ \
+ return paConverters. source ## _To_ ## destination; \
+ }else{ /* dither */ \
+ return paConverters. source ## _To_ ## destination ## _Dither; \
+ }
+
+/* -------------------------------------------------------------------------- */
+
+#define PA_USE_CONVERTER_( source, destination )\
+ return paConverters. source ## _To_ ## destination;
+
+/* -------------------------------------------------------------------------- */
+
+#define PA_UNITY_CONVERSION_( wordlength )\
+ return paConverters. Copy_ ## wordlength ## _To_ ## wordlength;
+
+/* -------------------------------------------------------------------------- */
+
+PaUtilConverter* PaUtil_SelectConverter( PaSampleFormat sourceFormat,
+ PaSampleFormat destinationFormat, PaStreamFlags flags )
+{
+ PA_SELECT_FORMAT_( sourceFormat,
+ /* paFloat32: */
+ PA_SELECT_FORMAT_( destinationFormat,
+ /* paFloat32: */ PA_UNITY_CONVERSION_( 32 ),
+ /* paInt32: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int32 ),
+ /* paInt24: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int24 ),
+ /* paInt16: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int16 ),
+ /* paInt8: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, Int8 ),
+ /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_CLIP_( flags, Float32, UInt8 )
+ ),
+ /* paInt32: */
+ PA_SELECT_FORMAT_( destinationFormat,
+ /* paFloat32: */ PA_USE_CONVERTER_( Int32, Float32 ),
+ /* paInt32: */ PA_UNITY_CONVERSION_( 32 ),
+ /* paInt24: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, Int24 ),
+ /* paInt16: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, Int16 ),
+ /* paInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, Int8 ),
+ /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int32, UInt8 )
+ ),
+ /* paInt24: */
+ PA_SELECT_FORMAT_( destinationFormat,
+ /* paFloat32: */ PA_USE_CONVERTER_( Int24, Float32 ),
+ /* paInt32: */ PA_USE_CONVERTER_( Int24, Int32 ),
+ /* paInt24: */ PA_UNITY_CONVERSION_( 24 ),
+ /* paInt16: */ PA_SELECT_CONVERTER_DITHER_( flags, Int24, Int16 ),
+ /* paInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int24, Int8 ),
+ /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int24, UInt8 )
+ ),
+ /* paInt16: */
+ PA_SELECT_FORMAT_( destinationFormat,
+ /* paFloat32: */ PA_USE_CONVERTER_( Int16, Float32 ),
+ /* paInt32: */ PA_USE_CONVERTER_( Int16, Int32 ),
+ /* paInt24: */ PA_USE_CONVERTER_( Int16, Int24 ),
+ /* paInt16: */ PA_UNITY_CONVERSION_( 16 ),
+ /* paInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int16, Int8 ),
+ /* paUInt8: */ PA_SELECT_CONVERTER_DITHER_( flags, Int16, UInt8 )
+ ),
+ /* paInt8: */
+ PA_SELECT_FORMAT_( destinationFormat,
+ /* paFloat32: */ PA_USE_CONVERTER_( Int8, Float32 ),
+ /* paInt32: */ PA_USE_CONVERTER_( Int8, Int32 ),
+ /* paInt24: */ PA_USE_CONVERTER_( Int8, Int24 ),
+ /* paInt16: */ PA_USE_CONVERTER_( Int8, Int16 ),
+ /* paInt8: */ PA_UNITY_CONVERSION_( 8 ),
+ /* paUInt8: */ PA_USE_CONVERTER_( Int8, UInt8 )
+ ),
+ /* paUInt8: */
+ PA_SELECT_FORMAT_( destinationFormat,
+ /* paFloat32: */ PA_USE_CONVERTER_( UInt8, Float32 ),
+ /* paInt32: */ PA_USE_CONVERTER_( UInt8, Int32 ),
+ /* paInt24: */ PA_USE_CONVERTER_( UInt8, Int24 ),
+ /* paInt16: */ PA_USE_CONVERTER_( UInt8, Int16 ),
+ /* paInt8: */ PA_USE_CONVERTER_( UInt8, Int8 ),
+ /* paUInt8: */ PA_UNITY_CONVERSION_( 8 )
+ )
+ )
+}
+
+/* -------------------------------------------------------------------------- */
+
+#ifdef PA_NO_STANDARD_CONVERTERS
+
+/* -------------------------------------------------------------------------- */
+
+PaUtilConverterTable paConverters = {
+ 0, /* PaUtilConverter *Float32_To_Int32; */
+ 0, /* PaUtilConverter *Float32_To_Int32_Dither; */
+ 0, /* PaUtilConverter *Float32_To_Int32_Clip; */
+ 0, /* PaUtilConverter *Float32_To_Int32_DitherClip; */
+
+ 0, /* PaUtilConverter *Float32_To_Int24; */
+ 0, /* PaUtilConverter *Float32_To_Int24_Dither; */
+ 0, /* PaUtilConverter *Float32_To_Int24_Clip; */
+ 0, /* PaUtilConverter *Float32_To_Int24_DitherClip; */
+
+ 0, /* PaUtilConverter *Float32_To_Int16; */
+ 0, /* PaUtilConverter *Float32_To_Int16_Dither; */
+ 0, /* PaUtilConverter *Float32_To_Int16_Clip; */
+ 0, /* PaUtilConverter *Float32_To_Int16_DitherClip; */
+
+ 0, /* PaUtilConverter *Float32_To_Int8; */
+ 0, /* PaUtilConverter *Float32_To_Int8_Dither; */
+ 0, /* PaUtilConverter *Float32_To_Int8_Clip; */
+ 0, /* PaUtilConverter *Float32_To_Int8_DitherClip; */
+
+ 0, /* PaUtilConverter *Float32_To_UInt8; */
+ 0, /* PaUtilConverter *Float32_To_UInt8_Dither; */
+ 0, /* PaUtilConverter *Float32_To_UInt8_Clip; */
+ 0, /* PaUtilConverter *Float32_To_UInt8_DitherClip; */
+
+ 0, /* PaUtilConverter *Int32_To_Float32; */
+ 0, /* PaUtilConverter *Int32_To_Int24; */
+ 0, /* PaUtilConverter *Int32_To_Int24_Dither; */
+ 0, /* PaUtilConverter *Int32_To_Int16; */
+ 0, /* PaUtilConverter *Int32_To_Int16_Dither; */
+ 0, /* PaUtilConverter *Int32_To_Int8; */
+ 0, /* PaUtilConverter *Int32_To_Int8_Dither; */
+ 0, /* PaUtilConverter *Int32_To_UInt8; */
+ 0, /* PaUtilConverter *Int32_To_UInt8_Dither; */
+
+ 0, /* PaUtilConverter *Int24_To_Float32; */
+ 0, /* PaUtilConverter *Int24_To_Int32; */
+ 0, /* PaUtilConverter *Int24_To_Int16; */
+ 0, /* PaUtilConverter *Int24_To_Int16_Dither; */
+ 0, /* PaUtilConverter *Int24_To_Int8; */
+ 0, /* PaUtilConverter *Int24_To_Int8_Dither; */
+ 0, /* PaUtilConverter *Int24_To_UInt8; */
+ 0, /* PaUtilConverter *Int24_To_UInt8_Dither; */
+
+ 0, /* PaUtilConverter *Int16_To_Float32; */
+ 0, /* PaUtilConverter *Int16_To_Int32; */
+ 0, /* PaUtilConverter *Int16_To_Int24; */
+ 0, /* PaUtilConverter *Int16_To_Int8; */
+ 0, /* PaUtilConverter *Int16_To_Int8_Dither; */
+ 0, /* PaUtilConverter *Int16_To_UInt8; */
+ 0, /* PaUtilConverter *Int16_To_UInt8_Dither; */
+
+ 0, /* PaUtilConverter *Int8_To_Float32; */
+ 0, /* PaUtilConverter *Int8_To_Int32; */
+ 0, /* PaUtilConverter *Int8_To_Int24 */
+ 0, /* PaUtilConverter *Int8_To_Int16; */
+ 0, /* PaUtilConverter *Int8_To_UInt8; */
+
+ 0, /* PaUtilConverter *UInt8_To_Float32; */
+ 0, /* PaUtilConverter *UInt8_To_Int32; */
+ 0, /* PaUtilConverter *UInt8_To_Int24; */
+ 0, /* PaUtilConverter *UInt8_To_Int16; */
+ 0, /* PaUtilConverter *UInt8_To_Int8; */
+
+ 0, /* PaUtilConverter *Copy_8_To_8; */
+ 0, /* PaUtilConverter *Copy_16_To_16; */
+ 0, /* PaUtilConverter *Copy_24_To_24; */
+ 0 /* PaUtilConverter *Copy_32_To_32; */
+};
+
+/* -------------------------------------------------------------------------- */
+
+#else /* PA_NO_STANDARD_CONVERTERS is not defined */
+
+/* -------------------------------------------------------------------------- */
+
+#define PA_CLIP_( val, min, max )\
+ { val = ((val) < (min)) ? (min) : (((val) > (max)) ? (max) : (val)); }
+
+
+static const float const_1_div_128_ = 1.0f / 128.0f; /* 8 bit multiplier */
+
+static const float const_1_div_32768_ = 1.0f / 32768.f; /* 16 bit multiplier */
+
+static const double const_1_div_2147483648_ = 1.0 / 2147483648.0; /* 32 bit multiplier */
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* REVIEW */
+#ifdef PA_USE_C99_LRINTF
+ float scaled = *src * 0x7FFFFFFF;
+ *dest = lrintf(scaled-0.5f);
+#else
+ double scaled = *src * 0x7FFFFFFF;
+ *dest = (PaInt32) scaled;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int32_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*)destinationBuffer;
+
+ while( count-- )
+ {
+ /* REVIEW */
+#ifdef PA_USE_C99_LRINTF
+ float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ float dithered = ((float)*src * (2147483646.0f)) + dither;
+ *dest = lrintf(dithered - 0.5f);
+#else
+ double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ double dithered = ((double)*src * (2147483646.0)) + dither;
+ *dest = (PaInt32) dithered;
+#endif
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int32_Clip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*)destinationBuffer;
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* REVIEW */
+#ifdef PA_USE_C99_LRINTF
+ float scaled = *src * 0x7FFFFFFF;
+ PA_CLIP_( scaled, -2147483648.f, 2147483647.f );
+ *dest = lrintf(scaled-0.5f);
+#else
+ double scaled = *src * 0x7FFFFFFF;
+ PA_CLIP_( scaled, -2147483648., 2147483647. );
+ *dest = (PaInt32) scaled;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int32_DitherClip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*)destinationBuffer;
+
+ while( count-- )
+ {
+ /* REVIEW */
+#ifdef PA_USE_C99_LRINTF
+ float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ float dithered = ((float)*src * (2147483646.0f)) + dither;
+ PA_CLIP_( dithered, -2147483648.f, 2147483647.f );
+ *dest = lrintf(dithered-0.5f);
+#else
+ double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ double dithered = ((double)*src * (2147483646.0)) + dither;
+ PA_CLIP_( dithered, -2147483648., 2147483647. );
+ *dest = (PaInt32) dithered;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int24(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ PaInt32 temp;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* convert to 32 bit and drop the low 8 bits */
+ double scaled = *src * 0x7FFFFFFF;
+ temp = (PaInt32) scaled;
+
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 8);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 24);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 24);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 8);
+#endif
+
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int24_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ PaInt32 temp;
+
+ while( count-- )
+ {
+ /* convert to 32 bit and drop the low 8 bits */
+
+ double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ double dithered = ((double)*src * (2147483646.0)) + dither;
+
+ temp = (PaInt32) dithered;
+
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 8);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 24);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 24);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 8);
+#endif
+
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int24_Clip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ PaInt32 temp;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* convert to 32 bit and drop the low 8 bits */
+ double scaled = *src * 0x7FFFFFFF;
+ PA_CLIP_( scaled, -2147483648., 2147483647. );
+ temp = (PaInt32) scaled;
+
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 8);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 24);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 24);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 8);
+#endif
+
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int24_DitherClip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ PaInt32 temp;
+
+ while( count-- )
+ {
+ /* convert to 32 bit and drop the low 8 bits */
+
+ double dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ double dithered = ((double)*src * (2147483646.0)) + dither;
+ PA_CLIP_( dithered, -2147483648., 2147483647. );
+
+ temp = (PaInt32) dithered;
+
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 8);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 24);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 24);
+ dest[1] = (unsigned char)(temp >> 16);
+ dest[2] = (unsigned char)(temp >> 8);
+#endif
+
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int16(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+#ifdef PA_USE_C99_LRINTF
+ float tempf = (*src * (32767.0f)) ;
+ *dest = lrintf(tempf-0.5f);
+#else
+ short samp = (short) (*src * (32767.0f));
+ *dest = samp;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int16_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+
+ while( count-- )
+ {
+
+ float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ float dithered = (*src * (32766.0f)) + dither;
+
+#ifdef PA_USE_C99_LRINTF
+ *dest = lrintf(dithered-0.5f);
+#else
+ *dest = (PaInt16) dithered;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int16_Clip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+#ifdef PA_USE_C99_LRINTF
+ long samp = lrintf((*src * (32767.0f)) -0.5f);
+#else
+ long samp = (PaInt32) (*src * (32767.0f));
+#endif
+ PA_CLIP_( samp, -0x8000, 0x7FFF );
+ *dest = (PaInt16) samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int16_DitherClip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+
+ float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ float dithered = (*src * (32766.0f)) + dither;
+ PaInt32 samp = (PaInt32) dithered;
+ PA_CLIP_( samp, -0x8000, 0x7FFF );
+#ifdef PA_USE_C99_LRINTF
+ *dest = lrintf(samp-0.5f);
+#else
+ *dest = (PaInt16) samp;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ signed char samp = (signed char) (*src * (127.0f));
+ *dest = samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ float dithered = (*src * (126.0f)) + dither;
+ PaInt32 samp = (PaInt32) dithered;
+ *dest = (signed char) samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int8_Clip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ PaInt32 samp = (PaInt32)(*src * (127.0f));
+ PA_CLIP_( samp, -0x80, 0x7F );
+ *dest = (signed char) samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_Int8_DitherClip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ float dither = PaUtil_GenerateFloatTriangularDither( ditherGenerator );
+ /* use smaller scaler to prevent overflow when we add the dither */
+ float dithered = (*src * (126.0f)) + dither;
+ PaInt32 samp = (PaInt32) dithered;
+ PA_CLIP_( samp, -0x80, 0x7F );
+ *dest = (signed char) samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_UInt8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ unsigned char samp = (unsigned char)(128 + ((unsigned char) (*src * (127.0f))));
+ *dest = samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_UInt8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* IMPLEMENT ME */
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_UInt8_Clip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* IMPLEMENT ME */
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Float32_To_UInt8_DitherClip(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ float *src = (float*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* IMPLEMENT ME */
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_Float32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ float *dest = (float*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ *dest = (float) ((double)*src * const_1_div_2147483648_);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_Int24(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* REVIEW */
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = (unsigned char)(*src >> 8);
+ dest[1] = (unsigned char)(*src >> 16);
+ dest[2] = (unsigned char)(*src >> 24);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (unsigned char)(*src >> 24);
+ dest[1] = (unsigned char)(*src >> 16);
+ dest[2] = (unsigned char)(*src >> 8);
+#endif
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_Int24_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ (void) destinationBuffer; /* unused parameters */
+ (void) destinationStride; /* unused parameters */
+ (void) sourceBuffer; /* unused parameters */
+ (void) sourceStride; /* unused parameters */
+ (void) count; /* unused parameters */
+ (void) ditherGenerator; /* unused parameters */
+ /* IMPLEMENT ME */
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_Int16(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ *dest = (PaInt16) ((*src) >> 16);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_Int16_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+ PaInt32 dither;
+
+ while( count-- )
+ {
+ /* REVIEW */
+ dither = PaUtil_Generate16BitTriangularDither( ditherGenerator );
+ *dest = (PaInt16) ((((*src)>>1) + dither) >> 15);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_Int8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ *dest = (signed char) ((*src) >> 24);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_Int8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ PaInt32 dither;
+
+ while( count-- )
+ {
+ /* REVIEW */
+ dither = PaUtil_Generate16BitTriangularDither( ditherGenerator );
+ *dest = (signed char) ((((*src)>>1) + dither) >> 23);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_UInt8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (unsigned char)(((*src) >> 24) + 128);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int32_To_UInt8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt32 *src = (PaInt32*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* IMPLEMENT ME */
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_Float32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ float *dest = (float*)destinationBuffer;
+ PaInt32 temp;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+
+#if defined(PA_LITTLE_ENDIAN)
+ temp = (((long)src[0]) << 8);
+ temp = temp | (((long)src[1]) << 16);
+ temp = temp | (((long)src[2]) << 24);
+#elif defined(PA_BIG_ENDIAN)
+ temp = (((long)src[0]) << 24);
+ temp = temp | (((long)src[1]) << 16);
+ temp = temp | (((long)src[2]) << 8);
+#endif
+
+ *dest = (float) ((double)temp * const_1_div_2147483648_);
+
+ src += sourceStride * 3;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_Int32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*) destinationBuffer;
+ PaInt32 temp;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+
+#if defined(PA_LITTLE_ENDIAN)
+ temp = (((long)src[0]) << 8);
+ temp = temp | (((long)src[1]) << 16);
+ temp = temp | (((long)src[2]) << 24);
+#elif defined(PA_BIG_ENDIAN)
+ temp = (((long)src[0]) << 24);
+ temp = temp | (((long)src[1]) << 16);
+ temp = temp | (((long)src[2]) << 8);
+#endif
+
+ *dest = temp;
+
+ src += sourceStride * 3;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_Int16(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+
+ PaInt16 temp;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+
+#if defined(PA_LITTLE_ENDIAN)
+ /* src[0] is discarded */
+ temp = (((PaInt16)src[1]));
+ temp = temp | (PaInt16)(((PaInt16)src[2]) << 8);
+#elif defined(PA_BIG_ENDIAN)
+ /* src[2] is discarded */
+ temp = (PaInt16)(((PaInt16)src[0]) << 8);
+ temp = temp | (((PaInt16)src[1]));
+#endif
+
+ *dest = temp;
+
+ src += sourceStride * 3;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_Int16_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ (void) destinationBuffer; /* unused parameters */
+ (void) destinationStride; /* unused parameters */
+ (void) sourceBuffer; /* unused parameters */
+ (void) sourceStride; /* unused parameters */
+ (void) count; /* unused parameters */
+ (void) ditherGenerator; /* unused parameters */
+ /* IMPLEMENT ME */
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_Int8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+
+#if defined(PA_LITTLE_ENDIAN)
+ /* src[0] is discarded */
+ /* src[1] is discarded */
+ *dest = src[2];
+#elif defined(PA_BIG_ENDIAN)
+ /* src[2] is discarded */
+ /* src[1] is discarded */
+ *dest = src[0];
+#endif
+
+ src += sourceStride * 3;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_Int8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ (void) destinationBuffer; /* unused parameters */
+ (void) destinationStride; /* unused parameters */
+ (void) sourceBuffer; /* unused parameters */
+ (void) sourceStride; /* unused parameters */
+ (void) count; /* unused parameters */
+ (void) ditherGenerator; /* unused parameters */
+ /* IMPLEMENT ME */
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_UInt8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+
+#if defined(PA_LITTLE_ENDIAN)
+ /* src[0] is discarded */
+ /* src[1] is discarded */
+ *dest = (unsigned char)(src[2] + 128);
+#elif defined(PA_BIG_ENDIAN)
+ *dest = (unsigned char)(src[0] + 128);
+ /* src[1] is discarded */
+ /* src[2] is discarded */
+#endif
+
+ src += sourceStride * 3;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int24_To_UInt8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ (void) destinationBuffer; /* unused parameters */
+ (void) destinationStride; /* unused parameters */
+ (void) sourceBuffer; /* unused parameters */
+ (void) sourceStride; /* unused parameters */
+ (void) count; /* unused parameters */
+ (void) ditherGenerator; /* unused parameters */
+ /* IMPLEMENT ME */
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int16_To_Float32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt16 *src = (PaInt16*)sourceBuffer;
+ float *dest = (float*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ float samp = *src * const_1_div_32768_; /* FIXME: i'm concerned about this being asymetrical with float->int16 -rb */
+ *dest = samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int16_To_Int32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt16 *src = (PaInt16*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* REVIEW: we should consider something like
+ (*src << 16) | (*src & 0xFFFF)
+ */
+
+ *dest = *src << 16;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int16_To_Int24(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt16 *src = (PaInt16*) sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ PaInt16 temp;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ temp = *src;
+
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = 0;
+ dest[1] = (unsigned char)(temp);
+ dest[2] = (unsigned char)(temp >> 8);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (unsigned char)(temp >> 8);
+ dest[1] = (unsigned char)(temp);
+ dest[2] = 0;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int16_To_Int8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt16 *src = (PaInt16*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (signed char)((*src) >> 8);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int16_To_Int8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt16 *src = (PaInt16*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* IMPLEMENT ME */
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int16_To_UInt8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt16 *src = (PaInt16*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (unsigned char)(((*src) >> 8) + 128);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int16_To_UInt8_Dither(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaInt16 *src = (PaInt16*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ /* IMPLEMENT ME */
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int8_To_Float32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ signed char *src = (signed char*)sourceBuffer;
+ float *dest = (float*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ float samp = *src * const_1_div_128_;
+ *dest = samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int8_To_Int32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ signed char *src = (signed char*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (*src) << 24;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int8_To_Int24(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ signed char *src = (signed char*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = 0;
+ dest[1] = 0;
+ dest[2] = (*src);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (*src);
+ dest[1] = 0;
+ dest[2] = 0;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int8_To_Int16(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ signed char *src = (signed char*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (PaInt16)((*src) << 8);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Int8_To_UInt8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ signed char *src = (signed char*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (unsigned char)(*src + 128);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void UInt8_To_Float32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ float *dest = (float*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ float samp = (*src - 128) * const_1_div_128_;
+ *dest = samp;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void UInt8_To_Int32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ PaInt32 *dest = (PaInt32*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (*src - 128) << 24;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void UInt8_To_Int24(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+ (void) ditherGenerator; /* unused parameters */
+
+ while( count-- )
+ {
+
+#if defined(PA_LITTLE_ENDIAN)
+ dest[0] = 0;
+ dest[1] = 0;
+ dest[2] = (unsigned char)(*src - 128);
+#elif defined(PA_BIG_ENDIAN)
+ dest[0] = (unsigned char)(*src - 128);
+ dest[1] = 0;
+ dest[2] = 0;
+#endif
+
+ src += sourceStride;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void UInt8_To_Int16(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ PaInt16 *dest = (PaInt16*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (PaInt16)((*src - 128) << 8);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void UInt8_To_Int8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ signed char *dest = (signed char*)destinationBuffer;
+ (void)ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ (*dest) = (signed char)(*src - 128);
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Copy_8_To_8(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ *dest = *src;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Copy_16_To_16(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaUint16 *src = (PaUint16 *)sourceBuffer;
+ PaUint16 *dest = (PaUint16 *)destinationBuffer;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ *dest = *src;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Copy_24_To_24(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ unsigned char *src = (unsigned char*)sourceBuffer;
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ dest[0] = src[0];
+ dest[1] = src[1];
+ dest[2] = src[2];
+
+ src += sourceStride * 3;
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Copy_32_To_32(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator )
+{
+ PaUint32 *dest = (PaUint32 *)destinationBuffer;
+ PaUint32 *src = (PaUint32 *)sourceBuffer;
+
+ (void) ditherGenerator; /* unused parameter */
+
+ while( count-- )
+ {
+ *dest = *src;
+
+ src += sourceStride;
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+PaUtilConverterTable paConverters = {
+ Float32_To_Int32, /* PaUtilConverter *Float32_To_Int32; */
+ Float32_To_Int32_Dither, /* PaUtilConverter *Float32_To_Int32_Dither; */
+ Float32_To_Int32_Clip, /* PaUtilConverter *Float32_To_Int32_Clip; */
+ Float32_To_Int32_DitherClip, /* PaUtilConverter *Float32_To_Int32_DitherClip; */
+
+ Float32_To_Int24, /* PaUtilConverter *Float32_To_Int24; */
+ Float32_To_Int24_Dither, /* PaUtilConverter *Float32_To_Int24_Dither; */
+ Float32_To_Int24_Clip, /* PaUtilConverter *Float32_To_Int24_Clip; */
+ Float32_To_Int24_DitherClip, /* PaUtilConverter *Float32_To_Int24_DitherClip; */
+
+ Float32_To_Int16, /* PaUtilConverter *Float32_To_Int16; */
+ Float32_To_Int16_Dither, /* PaUtilConverter *Float32_To_Int16_Dither; */
+ Float32_To_Int16_Clip, /* PaUtilConverter *Float32_To_Int16_Clip; */
+ Float32_To_Int16_DitherClip, /* PaUtilConverter *Float32_To_Int16_DitherClip; */
+
+ Float32_To_Int8, /* PaUtilConverter *Float32_To_Int8; */
+ Float32_To_Int8_Dither, /* PaUtilConverter *Float32_To_Int8_Dither; */
+ Float32_To_Int8_Clip, /* PaUtilConverter *Float32_To_Int8_Clip; */
+ Float32_To_Int8_DitherClip, /* PaUtilConverter *Float32_To_Int8_DitherClip; */
+
+ Float32_To_UInt8, /* PaUtilConverter *Float32_To_UInt8; */
+ Float32_To_UInt8_Dither, /* PaUtilConverter *Float32_To_UInt8_Dither; */
+ Float32_To_UInt8_Clip, /* PaUtilConverter *Float32_To_UInt8_Clip; */
+ Float32_To_UInt8_DitherClip, /* PaUtilConverter *Float32_To_UInt8_DitherClip; */
+
+ Int32_To_Float32, /* PaUtilConverter *Int32_To_Float32; */
+ Int32_To_Int24, /* PaUtilConverter *Int32_To_Int24; */
+ Int32_To_Int24_Dither, /* PaUtilConverter *Int32_To_Int24_Dither; */
+ Int32_To_Int16, /* PaUtilConverter *Int32_To_Int16; */
+ Int32_To_Int16_Dither, /* PaUtilConverter *Int32_To_Int16_Dither; */
+ Int32_To_Int8, /* PaUtilConverter *Int32_To_Int8; */
+ Int32_To_Int8_Dither, /* PaUtilConverter *Int32_To_Int8_Dither; */
+ Int32_To_UInt8, /* PaUtilConverter *Int32_To_UInt8; */
+ Int32_To_UInt8_Dither, /* PaUtilConverter *Int32_To_UInt8_Dither; */
+
+ Int24_To_Float32, /* PaUtilConverter *Int24_To_Float32; */
+ Int24_To_Int32, /* PaUtilConverter *Int24_To_Int32; */
+ Int24_To_Int16, /* PaUtilConverter *Int24_To_Int16; */
+ Int24_To_Int16_Dither, /* PaUtilConverter *Int24_To_Int16_Dither; */
+ Int24_To_Int8, /* PaUtilConverter *Int24_To_Int8; */
+ Int24_To_Int8_Dither, /* PaUtilConverter *Int24_To_Int8_Dither; */
+ Int24_To_UInt8, /* PaUtilConverter *Int24_To_UInt8; */
+ Int24_To_UInt8_Dither, /* PaUtilConverter *Int24_To_UInt8_Dither; */
+
+ Int16_To_Float32, /* PaUtilConverter *Int16_To_Float32; */
+ Int16_To_Int32, /* PaUtilConverter *Int16_To_Int32; */
+ Int16_To_Int24, /* PaUtilConverter *Int16_To_Int24; */
+ Int16_To_Int8, /* PaUtilConverter *Int16_To_Int8; */
+ Int16_To_Int8_Dither, /* PaUtilConverter *Int16_To_Int8_Dither; */
+ Int16_To_UInt8, /* PaUtilConverter *Int16_To_UInt8; */
+ Int16_To_UInt8_Dither, /* PaUtilConverter *Int16_To_UInt8_Dither; */
+
+ Int8_To_Float32, /* PaUtilConverter *Int8_To_Float32; */
+ Int8_To_Int32, /* PaUtilConverter *Int8_To_Int32; */
+ Int8_To_Int24, /* PaUtilConverter *Int8_To_Int24 */
+ Int8_To_Int16, /* PaUtilConverter *Int8_To_Int16; */
+ Int8_To_UInt8, /* PaUtilConverter *Int8_To_UInt8; */
+
+ UInt8_To_Float32, /* PaUtilConverter *UInt8_To_Float32; */
+ UInt8_To_Int32, /* PaUtilConverter *UInt8_To_Int32; */
+ UInt8_To_Int24, /* PaUtilConverter *UInt8_To_Int24; */
+ UInt8_To_Int16, /* PaUtilConverter *UInt8_To_Int16; */
+ UInt8_To_Int8, /* PaUtilConverter *UInt8_To_Int8; */
+
+ Copy_8_To_8, /* PaUtilConverter *Copy_8_To_8; */
+ Copy_16_To_16, /* PaUtilConverter *Copy_16_To_16; */
+ Copy_24_To_24, /* PaUtilConverter *Copy_24_To_24; */
+ Copy_32_To_32 /* PaUtilConverter *Copy_32_To_32; */
+};
+
+/* -------------------------------------------------------------------------- */
+
+#endif /* PA_NO_STANDARD_CONVERTERS */
+
+/* -------------------------------------------------------------------------- */
+
+PaUtilZeroer* PaUtil_SelectZeroer( PaSampleFormat destinationFormat )
+{
+ switch( destinationFormat & ~paNonInterleaved ){
+ case paFloat32:
+ return paZeroers.Zero32;
+ case paInt32:
+ return paZeroers.Zero32;
+ case paInt24:
+ return paZeroers.Zero24;
+ case paInt16:
+ return paZeroers.Zero16;
+ case paInt8:
+ return paZeroers.Zero8;
+ case paUInt8:
+ return paZeroers.ZeroU8;
+ default: return 0;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+#ifdef PA_NO_STANDARD_ZEROERS
+
+/* -------------------------------------------------------------------------- */
+
+PaUtilZeroerTable paZeroers = {
+ 0, /* PaUtilZeroer *ZeroU8; */
+ 0, /* PaUtilZeroer *Zero8; */
+ 0, /* PaUtilZeroer *Zero16; */
+ 0, /* PaUtilZeroer *Zero24; */
+ 0, /* PaUtilZeroer *Zero32; */
+};
+
+/* -------------------------------------------------------------------------- */
+
+#else /* PA_NO_STANDARD_ZEROERS is not defined */
+
+/* -------------------------------------------------------------------------- */
+
+static void ZeroU8( void *destinationBuffer, signed int destinationStride,
+ unsigned int count )
+{
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+
+ while( count-- )
+ {
+ *dest = 128;
+
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Zero8( void *destinationBuffer, signed int destinationStride,
+ unsigned int count )
+{
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+
+ while( count-- )
+ {
+ *dest = 0;
+
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Zero16( void *destinationBuffer, signed int destinationStride,
+ unsigned int count )
+{
+ PaUint16 *dest = (PaUint16 *)destinationBuffer;
+
+ while( count-- )
+ {
+ *dest = 0;
+
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Zero24( void *destinationBuffer, signed int destinationStride,
+ unsigned int count )
+{
+ unsigned char *dest = (unsigned char*)destinationBuffer;
+
+ while( count-- )
+ {
+ dest[0] = 0;
+ dest[1] = 0;
+ dest[2] = 0;
+
+ dest += destinationStride * 3;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+static void Zero32( void *destinationBuffer, signed int destinationStride,
+ unsigned int count )
+{
+ PaUint32 *dest = (PaUint32 *)destinationBuffer;
+
+ while( count-- )
+ {
+ *dest = 0;
+
+ dest += destinationStride;
+ }
+}
+
+/* -------------------------------------------------------------------------- */
+
+PaUtilZeroerTable paZeroers = {
+ ZeroU8, /* PaUtilZeroer *ZeroU8; */
+ Zero8, /* PaUtilZeroer *Zero8; */
+ Zero16, /* PaUtilZeroer *Zero16; */
+ Zero24, /* PaUtilZeroer *Zero24; */
+ Zero32, /* PaUtilZeroer *Zero32; */
+};
+
+/* -------------------------------------------------------------------------- */
+
+#endif /* PA_NO_STANDARD_ZEROERS */
diff --git a/portaudio/pa_common/pa_converters.h b/portaudio/pa_common/pa_converters.h
new file mode 100644
index 0000000000000000000000000000000000000000..1d83c990bb48f3355801019aa914062d982bbefd
--- /dev/null
+++ b/portaudio/pa_common/pa_converters.h
@@ -0,0 +1,254 @@
+#ifndef PA_CONVERTERS_H
+#define PA_CONVERTERS_H
+/*
+ * $Id$
+ * Portable Audio I/O Library sample conversion mechanism
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Phil Burk, Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Conversion functions used to convert buffers of samples from one
+ format to another.
+*/
+
+
+#include "portaudio.h" /* for PaSampleFormat */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+struct PaUtilTriangularDitherGenerator;
+
+
+/** Choose an available sample format which is most appropriate for
+ representing the requested format. If the requested format is not available
+ higher quality formats are considered before lower quality formates.
+ @param availableFormats A variable containing the logical OR of all available
+ formats.
+ @param format The desired format.
+ @return The most appropriate available format for representing the requested
+ format.
+*/
+PaSampleFormat PaUtil_SelectClosestAvailableFormat(
+ PaSampleFormat availableFormats, PaSampleFormat format );
+
+
+/* high level conversions functions for use by implementations */
+
+
+/** The generic sample converter prototype. Sample converters convert count
+ samples from sourceBuffer to destinationBuffer. The actual type of the data
+ pointed to by these parameters varys for different converter functions.
+ @param destinationBuffer A pointer to the first sample of the destination.
+ @param destinationStride An offset between successive destination samples
+ expressed in samples (not bytes.) It may be negative.
+ @param sourceBuffer A pointer to the first sample of the source.
+ @param sourceStride An offset between successive source samples
+ expressed in samples (not bytes.) It may be negative.
+ @param count The number of samples to convert.
+ @param ditherState State information used to calculate dither. Converters
+ that do not perform dithering will ignore this parameter, in which case
+ NULL or invalid dither state may be passed.
+*/
+typedef void PaUtilConverter(
+ void *destinationBuffer, signed int destinationStride,
+ void *sourceBuffer, signed int sourceStride,
+ unsigned int count, struct PaUtilTriangularDitherGenerator *ditherGenerator );
+
+
+/** Find a sample converter function for the given source and destinations
+ formats and flags (clip and dither.)
+ @return
+ A pointer to a PaUtilConverter which will perform the requested
+ conversion, or NULL if the given format conversion is not supported.
+ For conversions where clipping or dithering is not necessary, the
+ clip and dither flags are ignored and a non-clipping or dithering
+ version is returned.
+ If the source and destination formats are the same, a function which
+ copies data of the appropriate size will be returned.
+*/
+PaUtilConverter* PaUtil_SelectConverter( PaSampleFormat sourceFormat,
+ PaSampleFormat destinationFormat, PaStreamFlags flags );
+
+
+/** The generic buffer zeroer prototype. Buffer zeroers copy count zeros to
+ destinationBuffer. The actual type of the data pointed to varys for
+ different zeroer functions.
+ @param destinationBuffer A pointer to the first sample of the destination.
+ @param destinationStride An offset between successive destination samples
+ expressed in samples (not bytes.) It may be negative.
+ @param count The number of samples to zero.
+*/
+typedef void PaUtilZeroer(
+ void *destinationBuffer, signed int destinationStride, unsigned int count );
+
+
+/** Find a buffer zeroer function for the given destination format.
+ @return
+ A pointer to a PaUtilZeroer which will perform the requested
+ zeroing.
+*/
+PaUtilZeroer* PaUtil_SelectZeroer( PaSampleFormat destinationFormat );
+
+/*----------------------------------------------------------------------------*/
+/* low level functions and data structures which may be used for
+ substituting conversion functions */
+
+
+/** The type used to store all sample conversion functions.
+ @see paConverters;
+*/
+typedef struct{
+ PaUtilConverter *Float32_To_Int32;
+ PaUtilConverter *Float32_To_Int32_Dither;
+ PaUtilConverter *Float32_To_Int32_Clip;
+ PaUtilConverter *Float32_To_Int32_DitherClip;
+
+ PaUtilConverter *Float32_To_Int24;
+ PaUtilConverter *Float32_To_Int24_Dither;
+ PaUtilConverter *Float32_To_Int24_Clip;
+ PaUtilConverter *Float32_To_Int24_DitherClip;
+
+ PaUtilConverter *Float32_To_Int16;
+ PaUtilConverter *Float32_To_Int16_Dither;
+ PaUtilConverter *Float32_To_Int16_Clip;
+ PaUtilConverter *Float32_To_Int16_DitherClip;
+
+ PaUtilConverter *Float32_To_Int8;
+ PaUtilConverter *Float32_To_Int8_Dither;
+ PaUtilConverter *Float32_To_Int8_Clip;
+ PaUtilConverter *Float32_To_Int8_DitherClip;
+
+ PaUtilConverter *Float32_To_UInt8;
+ PaUtilConverter *Float32_To_UInt8_Dither;
+ PaUtilConverter *Float32_To_UInt8_Clip;
+ PaUtilConverter *Float32_To_UInt8_DitherClip;
+
+ PaUtilConverter *Int32_To_Float32;
+ PaUtilConverter *Int32_To_Int24;
+ PaUtilConverter *Int32_To_Int24_Dither;
+ PaUtilConverter *Int32_To_Int16;
+ PaUtilConverter *Int32_To_Int16_Dither;
+ PaUtilConverter *Int32_To_Int8;
+ PaUtilConverter *Int32_To_Int8_Dither;
+ PaUtilConverter *Int32_To_UInt8;
+ PaUtilConverter *Int32_To_UInt8_Dither;
+
+ PaUtilConverter *Int24_To_Float32;
+ PaUtilConverter *Int24_To_Int32;
+ PaUtilConverter *Int24_To_Int16;
+ PaUtilConverter *Int24_To_Int16_Dither;
+ PaUtilConverter *Int24_To_Int8;
+ PaUtilConverter *Int24_To_Int8_Dither;
+ PaUtilConverter *Int24_To_UInt8;
+ PaUtilConverter *Int24_To_UInt8_Dither;
+
+ PaUtilConverter *Int16_To_Float32;
+ PaUtilConverter *Int16_To_Int32;
+ PaUtilConverter *Int16_To_Int24;
+ PaUtilConverter *Int16_To_Int8;
+ PaUtilConverter *Int16_To_Int8_Dither;
+ PaUtilConverter *Int16_To_UInt8;
+ PaUtilConverter *Int16_To_UInt8_Dither;
+
+ PaUtilConverter *Int8_To_Float32;
+ PaUtilConverter *Int8_To_Int32;
+ PaUtilConverter *Int8_To_Int24;
+ PaUtilConverter *Int8_To_Int16;
+ PaUtilConverter *Int8_To_UInt8;
+
+ PaUtilConverter *UInt8_To_Float32;
+ PaUtilConverter *UInt8_To_Int32;
+ PaUtilConverter *UInt8_To_Int24;
+ PaUtilConverter *UInt8_To_Int16;
+ PaUtilConverter *UInt8_To_Int8;
+
+ PaUtilConverter *Copy_8_To_8; /* copy without any conversion */
+ PaUtilConverter *Copy_16_To_16; /* copy without any conversion */
+ PaUtilConverter *Copy_24_To_24; /* copy without any conversion */
+ PaUtilConverter *Copy_32_To_32; /* copy without any conversion */
+} PaUtilConverterTable;
+
+
+/** A table of pointers to all required converter functions.
+ PaUtil_SelectConverter() uses this table to lookup the appropriate
+ conversion functions. The fields of this structure are initialized
+ with default conversion functions. Fields may be NULL, indicating that
+ no conversion function is available. User code may substitue optimised
+ conversion functions by assigning different function pointers to
+ these fields.
+
+ @note
+ If the PA_NO_STANDARD_CONVERTERS preprocessor variable is defined,
+ PortAudio's standard converters will not be compiled, and all fields
+ of this structure will be initialized to NULL. In such cases, users
+ should supply their own conversion functions if the require PortAudio
+ to open a stream that requires sample conversion.
+
+ @see PaUtilConverterTable, PaUtilConverter, PaUtil_SelectConverter
+*/
+extern PaUtilConverterTable paConverters;
+
+
+/** The type used to store all buffer zeroing functions.
+ @see paZeroers;
+*/
+typedef struct{
+ PaUtilZeroer *ZeroU8; /* unsigned 8 bit, zero == 128 */
+ PaUtilZeroer *Zero8;
+ PaUtilZeroer *Zero16;
+ PaUtilZeroer *Zero24;
+ PaUtilZeroer *Zero32;
+} PaUtilZeroerTable;
+
+
+/** A table of pointers to all required zeroer functions.
+ PaUtil_SelectZeroer() uses this table to lookup the appropriate
+ conversion functions. The fields of this structure are initialized
+ with default conversion functions. User code may substitue optimised
+ conversion functions by assigning different function pointers to
+ these fields.
+
+ @note
+ If the PA_NO_STANDARD_ZEROERS preprocessor variable is defined,
+ PortAudio's standard zeroers will not be compiled, and all fields
+ of this structure will be initialized to NULL. In such cases, users
+ should supply their own zeroing functions for the sample sizes which
+ they intend to use.
+
+ @see PaUtilZeroerTable, PaUtilZeroer, PaUtil_SelectZeroer
+*/
+extern PaUtilZeroerTable paZeroers;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_CONVERTERS_H */
diff --git a/portaudio/pa_common/pa_cpuload.c b/portaudio/pa_common/pa_cpuload.c
new file mode 100644
index 0000000000000000000000000000000000000000..ee2147dc33fdfbda07255729acd5d8b79560f8e0
--- /dev/null
+++ b/portaudio/pa_common/pa_cpuload.c
@@ -0,0 +1,96 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library CPU Load measurement functions
+ * Portable CPU load measurement facility.
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 2002 Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Functions to assist in measuring the CPU utilization of a callback
+ stream. Used to implement the Pa_GetStreamCpuLoad() function.
+
+ @todo Dynamically calculate the coefficients used to smooth the CPU Load
+ Measurements over time to provide a uniform characterisation of CPU Load
+ independent of rate at which PaUtil_BeginCpuLoadMeasurement /
+ PaUtil_EndCpuLoadMeasurement are called.
+*/
+
+
+#include "pa_cpuload.h"
+
+#include <assert.h>
+
+#include "pa_util.h" /* for PaUtil_GetTime() */
+
+
+void PaUtil_InitializeCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer, double sampleRate )
+{
+ assert( sampleRate > 0 );
+
+ measurer->samplingPeriod = 1. / sampleRate;
+ measurer->averageLoad = 0.;
+}
+
+void PaUtil_ResetCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer )
+{
+ measurer->averageLoad = 0.;
+}
+
+void PaUtil_BeginCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer )
+{
+ measurer->measurementStartTime = PaUtil_GetTime();
+}
+
+
+void PaUtil_EndCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer, unsigned long framesProcessed )
+{
+ double measurementEndTime, secondsFor100Percent, measuredLoad;
+
+ if( framesProcessed > 0 ){
+ measurementEndTime = PaUtil_GetTime();
+
+ assert( framesProcessed > 0 );
+ secondsFor100Percent = framesProcessed * measurer->samplingPeriod;
+
+ measuredLoad = (measurementEndTime - measurer->measurementStartTime) / secondsFor100Percent;
+
+ /* Low pass filter the calculated CPU load to reduce jitter using a simple IIR low pass filter. */
+ /** FIXME @todo these coefficients shouldn't be hardwired */
+#define LOWPASS_COEFFICIENT_0 (0.9)
+#define LOWPASS_COEFFICIENT_1 (0.99999 - LOWPASS_COEFFICIENT_0)
+
+ measurer->averageLoad = (LOWPASS_COEFFICIENT_0 * measurer->averageLoad) +
+ (LOWPASS_COEFFICIENT_1 * measuredLoad);
+ }
+}
+
+
+double PaUtil_GetCpuLoad( PaUtilCpuLoadMeasurer* measurer )
+{
+ return measurer->averageLoad;
+}
diff --git a/portaudio/pa_common/pa_cpuload.h b/portaudio/pa_common/pa_cpuload.h
new file mode 100644
index 0000000000000000000000000000000000000000..131ad10bd30f706048328f6fe08430fbe7ca0197
--- /dev/null
+++ b/portaudio/pa_common/pa_cpuload.h
@@ -0,0 +1,63 @@
+#ifndef PA_CPULOAD_H
+#define PA_CPULOAD_H
+/*
+ * $Id$
+ * Portable Audio I/O Library CPU Load measurement functions
+ * Portable CPU load measurement facility.
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 2002 Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Functions to assist in measuring the CPU utilization of a callback
+ stream. Used to implement the Pa_GetStreamCpuLoad() function.
+*/
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+typedef struct {
+ double samplingPeriod;
+ double measurementStartTime;
+ double averageLoad;
+} PaUtilCpuLoadMeasurer; /**< @todo need better name than measurer */
+
+void PaUtil_InitializeCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer, double sampleRate );
+void PaUtil_BeginCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer );
+void PaUtil_EndCpuLoadMeasurement( PaUtilCpuLoadMeasurer* measurer, unsigned long framesProcessed );
+void PaUtil_ResetCpuLoadMeasurer( PaUtilCpuLoadMeasurer* measurer );
+double PaUtil_GetCpuLoad( PaUtilCpuLoadMeasurer* measurer );
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_CPULOAD_H */
diff --git a/portaudio/pa_common/pa_dither.c b/portaudio/pa_common/pa_dither.c
new file mode 100644
index 0000000000000000000000000000000000000000..d44a060cd20312368973143e278d170556e77a3b
--- /dev/null
+++ b/portaudio/pa_common/pa_dither.c
@@ -0,0 +1,204 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library triangular dither generator
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Phil Burk, Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Functions for generating dither noise
+*/
+
+
+#include "pa_dither.h"
+#include "pa_types.h"
+
+#define PA_DITHER_BITS_ (15)
+
+
+void PaUtil_InitializeTriangularDitherState( PaUtilTriangularDitherGenerator *state )
+{
+ state->previous = 0;
+ state->randSeed1 = 22222;
+ state->randSeed2 = 5555555;
+}
+
+
+signed long PaUtil_Generate16BitTriangularDither( PaUtilTriangularDitherGenerator *state )
+{
+ signed long current, highPass;
+
+ /* Generate two random numbers. */
+ state->randSeed1 = (state->randSeed1 * 196314165) + 907633515;
+ state->randSeed2 = (state->randSeed2 * 196314165) + 907633515;
+
+ /* Generate triangular distribution about 0.
+ * Shift before adding to prevent overflow which would skew the distribution.
+ * Also shift an extra bit for the high pass filter.
+ */
+#define DITHER_SHIFT_ ((SIZEOF_LONG*8 - PA_DITHER_BITS_) + 1)
+ current = (((signed long)state->randSeed1)>>DITHER_SHIFT_) +
+ (((signed long)state->randSeed2)>>DITHER_SHIFT_);
+
+ /* High pass filter to reduce audibility. */
+ highPass = current - state->previous;
+ state->previous = current;
+ return highPass;
+}
+
+
+/* Multiply by PA_FLOAT_DITHER_SCALE_ to get a float between -2.0 and +1.99999 */
+#define PA_FLOAT_DITHER_SCALE_ (1.0f / ((1<<PA_DITHER_BITS_)-1))
+static const float const_float_dither_scale_ = PA_FLOAT_DITHER_SCALE_;
+
+float PaUtil_GenerateFloatTriangularDither( PaUtilTriangularDitherGenerator *state )
+{
+ signed long current, highPass;
+
+ /* Generate two random numbers. */
+ state->randSeed1 = (state->randSeed1 * 196314165) + 907633515;
+ state->randSeed2 = (state->randSeed2 * 196314165) + 907633515;
+
+ /* Generate triangular distribution about 0.
+ * Shift before adding to prevent overflow which would skew the distribution.
+ * Also shift an extra bit for the high pass filter.
+ */
+#define DITHER_SHIFT_ ((SIZEOF_LONG*8 - PA_DITHER_BITS_) + 1)
+ current = (((signed long)state->randSeed1)>>DITHER_SHIFT_) +
+ (((signed long)state->randSeed2)>>DITHER_SHIFT_);
+
+ /* High pass filter to reduce audibility. */
+ highPass = current - state->previous;
+ state->previous = current;
+ return ((float)highPass) * const_float_dither_scale_;
+}
+
+
+/*
+The following alternate dither algorithms (from musicdsp.org) could be
+considered
+*/
+
+/*Noise shaped dither (March 2000)
+-------------------
+
+This is a simple implementation of highpass triangular-PDF dither with
+2nd-order noise shaping, for use when truncating floating point audio
+data to fixed point.
+
+The noise shaping lowers the noise floor by 11dB below 5kHz (@ 44100Hz
+sample rate) compared to triangular-PDF dither. The code below assumes
+input data is in the range +1 to -1 and doesn't check for overloads!
+
+To save time when generating dither for multiple channels you can do
+things like this: r3=(r1 & 0x7F)<<8; instead of calling rand() again.
+
+
+
+ int r1, r2; //rectangular-PDF random numbers
+ float s1, s2; //error feedback buffers
+ float s = 0.5f; //set to 0.0f for no noise shaping
+ float w = pow(2.0,bits-1); //word length (usually bits=16)
+ float wi= 1.0f/w;
+ float d = wi / RAND_MAX; //dither amplitude (2 lsb)
+ float o = wi * 0.5f; //remove dc offset
+ float in, tmp;
+ int out;
+
+
+//for each sample...
+
+ r2=r1; //can make HP-TRI dither by
+ r1=rand(); //subtracting previous rand()
+
+ in += s * (s1 + s1 - s2); //error feedback
+ tmp = in + o + d * (float)(r1 - r2); //dc offset and dither
+
+ out = (int)(w * tmp); //truncate downwards
+ if(tmp<0.0f) out--; //this is faster than floor()
+
+ s2 = s1;
+ s1 = in - wi * (float)out; //error
+
+
+
+--
+paul.kellett@maxim.abel.co.uk
+http://www.maxim.abel.co.uk
+*/
+
+
+/*
+16-to-8-bit first-order dither
+
+Type : First order error feedforward dithering code
+References : Posted by Jon Watte
+
+Notes :
+This is about as simple a dithering algorithm as you can implement, but it's
+likely to sound better than just truncating to N bits.
+
+Note that you might not want to carry forward the full difference for infinity.
+It's probably likely that the worst performance hit comes from the saturation
+conditionals, which can be avoided with appropriate instructions on many DSPs
+and integer SIMD type instructions, or CMOV.
+
+Last, if sound quality is paramount (such as when going from > 16 bits to 16
+bits) you probably want to use a higher-order dither function found elsewhere
+on this site.
+
+
+Code :
+// This code will down-convert and dither a 16-bit signed short
+// mono signal into an 8-bit unsigned char signal, using a first
+// order forward-feeding error term dither.
+
+#define uchar unsigned char
+
+void dither_one_channel_16_to_8( short * input, uchar * output, int count, int * memory )
+{
+ int m = *memory;
+ while( count-- > 0 ) {
+ int i = *input++;
+ i += m;
+ int j = i + 32768 - 128;
+ uchar o;
+ if( j < 0 ) {
+ o = 0;
+ }
+ else if( j > 65535 ) {
+ o = 255;
+ }
+ else {
+ o = (uchar)((j>>8)&0xff);
+ }
+ m = ((j-32768+128)-i);
+ *output++ = o;
+ }
+ *memory = m;
+}
+*/
diff --git a/portaudio/pa_common/pa_dither.h b/portaudio/pa_common/pa_dither.h
new file mode 100644
index 0000000000000000000000000000000000000000..148db275fb8b77c3dbd51e19ae68cd537e5d08d9
--- /dev/null
+++ b/portaudio/pa_common/pa_dither.h
@@ -0,0 +1,91 @@
+#ifndef PA_DITHER_H
+#define PA_DITHER_H
+/*
+ * $Id$
+ * Portable Audio I/O Library triangular dither generator
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Phil Burk, Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Functions for generating dither noise
+*/
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+/** @brief State needed to generate a dither signal */
+typedef struct PaUtilTriangularDitherGenerator{
+ unsigned long previous;
+ unsigned long randSeed1;
+ unsigned long randSeed2;
+} PaUtilTriangularDitherGenerator;
+
+
+/** @brief Initialize dither state */
+void PaUtil_InitializeTriangularDitherState( PaUtilTriangularDitherGenerator *ditherState );
+
+
+/**
+ @brief Calculate 2 LSB dither signal with a triangular distribution.
+ Ranged for adding to a 1 bit right-shifted 32 bit integer
+ prior to >>15. eg:
+<pre>
+ signed long in = *
+ signed long dither = PaUtil_Generate16BitTriangularDither( ditherState );
+ signed short out = (signed short)(((in>>1) + dither) >> 15);
+</pre>
+ @return
+ A signed long with a range of +32767 to -32768
+*/
+signed long PaUtil_Generate16BitTriangularDither( PaUtilTriangularDitherGenerator *ditherState );
+
+
+/**
+ @brief Calculate 2 LSB dither signal with a triangular distribution.
+ Ranged for adding to a pre-scaled float.
+<pre>
+ float in = *
+ float dither = PaUtil_GenerateFloatTriangularDither( ditherState );
+ // use smaller scaler to prevent overflow when we add the dither
+ signed short out = (signed short)(in*(32766.0f) + dither );
+</pre>
+ @return
+ A float with a range of -2.0 to +1.99999.
+*/
+float PaUtil_GenerateFloatTriangularDither( PaUtilTriangularDitherGenerator *ditherState );
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_DITHER_H */
diff --git a/portaudio/pa_common/pa_endianness.h b/portaudio/pa_common/pa_endianness.h
new file mode 100644
index 0000000000000000000000000000000000000000..3a573929b36edbf657441b868039bfee700e6752
--- /dev/null
+++ b/portaudio/pa_common/pa_endianness.h
@@ -0,0 +1,111 @@
+#ifndef PA_ENDIANNESS_H
+#define PA_ENDIANNESS_H
+/*
+ * $Id$
+ * Portable Audio I/O Library current platform endianness macros
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Phil Burk, Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Configure endianness symbols for the target processor.
+
+ Arrange for either the PA_LITTLE_ENDIAN or PA_BIG_ENDIAN preprocessor symbols
+ to be defined. The one that is defined reflects the endianness of the target
+ platform and may be used to implement conditional compilation of byte-order
+ dependent code.
+
+ If either PA_LITTLE_ENDIAN or PA_BIG_ENDIAN is defined already, then no attempt
+ is made to override that setting. This may be useful if you have a better way
+ of determining the platform's endianness. The autoconf mechanism uses this for
+ example.
+
+ A PA_VALIDATE_ENDIANNESS macro is provided to compare the compile time
+ and runtime endiannes and raise an assertion if they don't match.
+*/
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+#if defined(PA_LITTLE_ENDIAN) || defined(PA_BIG_ENDIAN)
+ /* endianness define has been set externally, such as by autoconf */
+
+ #if defined(PA_LITTLE_ENDIAN) && defined(PA_BIG_ENDIAN)
+ #error both PA_LITTLE_ENDIAN and PA_BIG_ENDIAN have been defined externally to pa_endianness.h - only one endianness at a time please
+ #endif
+
+#else
+ /* endianness define has not been set externally */
+
+ /* set PA_LITTLE_ENDIAN or PA_BIG_ENDIAN by testing well known platform specific defines */
+
+ #if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
+
+ #define PA_LITTLE_ENDIAN /* win32, assume intel byte order */
+
+ #else
+
+#endif
+
+ #if !defined(PA_LITTLE_ENDIAN) && !defined(PA_BIG_ENDIAN)
+ /*
+ If the following error is raised, you either need to modify the code above
+ to automatically determine the endianness from other symbols defined on your
+ platform, or define either PA_LITTLE_ENDIAN or PA_BIG_ENDIAN externally.
+ */
+ #error pa_endianness.h was unable to automatically determine the endianness of the target platform
+ #endif
+
+#endif
+
+/* PA_VALIDATE_ENDIANNESS compares the compile time and runtime endianness,
+ and raises an assertion if they don't match. <assert.h> must be included in
+ the context in which this macro is used.
+*/
+#if defined(PA_LITTLE_ENDIAN)
+ #define PA_VALIDATE_ENDIANNESS \
+ { \
+ const long nativeOne = 1; \
+ assert( "PortAudio: compile time and runtime endianness don't match" && (((char *)&nativeOne)[0]) == 1 ); \
+ }
+#elif defined(PA_BIG_ENDIAN)
+ #define PA_VALIDATE_ENDIANNESS \
+ { \
+ const long nativeOne = 1; \
+ assert( "PortAudio: compile time and runtime endianness don't match" && (((char *)&nativeOne)[0]) == 0 ); \
+ }
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_ENDIANNESS_H */
diff --git a/portaudio/pa_common/pa_front.c b/portaudio/pa_common/pa_front.c
new file mode 100644
index 0000000000000000000000000000000000000000..3b4a026b5524e31fa88d9f87cda7bf1c1fdd0ebc
--- /dev/null
+++ b/portaudio/pa_common/pa_front.c
@@ -0,0 +1,1976 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library Multi-Host API front end
+ * Validate function parameters and manage multiple host APIs.
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/* doxygen index page */
+/** @mainpage
+
+PortAudio is an open-source cross-platform ‘C’ library for audio input
+and output. It is designed to simplify the porting of audio applications
+between various platforms, and also to simplify the development of audio
+software in general by hiding the complexities of device interfacing.
+
+See the PortAudio website for further information http://www.portaudio.com/
+
+This documentation pertains to PortAudio V19, API version 2.0 which is
+currently under development. API version 2.0 differs in a number of ways from
+previous versions, please consult the enhancement proposals for further details:
+http://www.portaudio.com/docs/proposals/index.html
+
+This documentation is under construction. Things you might be interested in
+include:
+
+- The PortAudio API 2.0, as documented in portaudio.h
+
+- The <a href="todo.html">TODO List</a>
+
+Feel free to pick an item off TODO list and fix/implement it. You may want to
+enquire about status on the PortAudio mailing list first.
+*/
+
+
+/** @file
+ @brief Implements public PortAudio API, checks some errors, forwards to
+ host API implementations.
+
+ Implements the functions defined in the PortAudio API, checks for
+ some parameter and state inconsistencies and forwards API requests to
+ specific Host API implementations (via the interface declared in
+ pa_hostapi.h), and Streams (via the interface declared in pa_stream.h).
+
+ This file handles initialization and termination of Host API
+ implementations via initializers stored in the paHostApiInitializers
+ global variable.
+
+ Some utility functions declared in pa_util.h are implemented in this file.
+
+ All PortAudio API functions can be conditionally compiled with logging code.
+ To compile with logging, define the PA_LOG_API_CALLS precompiler symbol.
+
+ @todo Consider adding host API specific error text in Pa_GetErrorText() for
+ paUnanticipatedHostError
+
+ @todo Consider adding a new error code for when (inputParameters == NULL)
+ && (outputParameters == NULL)
+
+ @todo review whether Pa_CloseStream() should call the interface's
+ CloseStream function if aborting the stream returns an error code.
+
+ @todo Create new error codes if a NULL buffer pointer, or a
+ zero frame count is passed to Pa_ReadStream or Pa_WriteStream.
+*/
+
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <memory.h>
+#include <string.h>
+#include <assert.h> /* needed by PA_VALIDATE_ENDIANNESS */
+
+#include "portaudio.h"
+#include "pa_util.h"
+#include "pa_endianness.h"
+#include "pa_types.h"
+#include "pa_hostapi.h"
+#include "pa_stream.h"
+
+#include "pa_trace.h"
+
+
+#define PA_VERSION_ 1899
+#define PA_VERSION_TEXT_ "PortAudio V19-devel"
+
+
+
+/* #define PA_LOG_API_CALLS */
+
+/*
+ The basic format for log messages is described below. If you need to
+ add any log messages, please follow this format.
+
+ Function entry (void function):
+
+ "FunctionName called.\n"
+
+ Function entry (non void function):
+
+ "FunctionName called:\n"
+ "\tParam1Type param1: param1Value\n"
+ "\tParam2Type param2: param2Value\n" (etc...)
+
+
+ Function exit (no return value):
+
+ "FunctionName returned.\n"
+
+ Function exit (simple return value):
+
+ "FunctionName returned:\n"
+ "\tReturnType: returnValue\n\n"
+
+ If the return type is an error code, the error text is displayed in ()
+
+ If the return type is not an error code, but has taken a special value
+ because an error occurred, then the reason for the error is shown in []
+
+ If the return type is a struct ptr, the struct is dumped.
+
+ See the code below for examples
+*/
+
+
+int Pa_GetVersion( void )
+{
+ return PA_VERSION_;
+}
+
+
+const char* Pa_GetVersionText( void )
+{
+ return PA_VERSION_TEXT_;
+}
+
+
+
+#define PA_LAST_HOST_ERROR_TEXT_LENGTH_ 1024
+
+static char lastHostErrorText_[ PA_LAST_HOST_ERROR_TEXT_LENGTH_ + 1 ] = {0};
+
+static PaHostErrorInfo lastHostErrorInfo_ = { (PaHostApiTypeId)-1, 0, lastHostErrorText_ };
+
+
+void PaUtil_SetLastHostErrorInfo( PaHostApiTypeId hostApiType, long errorCode,
+ const char *errorText )
+{
+ lastHostErrorInfo_.hostApiType = hostApiType;
+ lastHostErrorInfo_.errorCode = errorCode;
+
+ strncpy( lastHostErrorText_, errorText, PA_LAST_HOST_ERROR_TEXT_LENGTH_ );
+}
+
+
+void PaUtil_DebugPrint( const char *format, ... )
+{
+ va_list ap;
+
+ va_start( ap, format );
+ vfprintf( stderr, format, ap );
+ va_end( ap );
+
+ fflush( stderr );
+}
+
+
+static PaUtilHostApiRepresentation **hostApis_ = 0;
+static int hostApisCount_ = 0;
+static int initializationCount_ = 0;
+static int deviceCount_ = 0;
+
+PaUtilStreamRepresentation *firstOpenStream_ = NULL;
+
+
+#define PA_IS_INITIALISED_ (initializationCount_ != 0)
+
+
+static int CountHostApiInitializers( void )
+{
+ int result = 0;
+
+ while( paHostApiInitializers[ result ] != 0 )
+ ++result;
+ return result;
+}
+
+
+static void TerminateHostApis( void )
+{
+ /* terminate in reverse order from initialization */
+
+ while( hostApisCount_ > 0 )
+ {
+ --hostApisCount_;
+ hostApis_[hostApisCount_]->Terminate( hostApis_[hostApisCount_] );
+ }
+ hostApisCount_ = 0;
+ deviceCount_ = 0;
+
+ if( hostApis_ != 0 )
+ PaUtil_FreeMemory( hostApis_ );
+ hostApis_ = 0;
+}
+
+
+static PaError InitializeHostApis( void )
+{
+ PaError result = paNoError;
+ int i, initializerCount, baseDeviceIndex;
+
+ initializerCount = CountHostApiInitializers();
+
+ hostApis_ = (PaUtilHostApiRepresentation**)PaUtil_AllocateMemory(
+ sizeof(PaUtilHostApiRepresentation*) * initializerCount );
+ if( !hostApis_ )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ hostApisCount_ = 0;
+ deviceCount_ = 0;
+ baseDeviceIndex = 0;
+
+ for( i=0; i< initializerCount; ++i )
+ {
+ hostApis_[hostApisCount_] = NULL;
+ result = paHostApiInitializers[i]( &hostApis_[hostApisCount_], hostApisCount_ );
+ if( result != paNoError )
+ goto error;
+
+ if( hostApis_[hostApisCount_] )
+ {
+
+ hostApis_[hostApisCount_]->privatePaFrontInfo.baseDeviceIndex = baseDeviceIndex;
+
+ if( hostApis_[hostApisCount_]->info.defaultInputDevice != paNoDevice )
+ hostApis_[hostApisCount_]->info.defaultInputDevice += baseDeviceIndex;
+
+ if( hostApis_[hostApisCount_]->info.defaultOutputDevice != paNoDevice )
+ hostApis_[hostApisCount_]->info.defaultOutputDevice += baseDeviceIndex;
+
+ baseDeviceIndex += hostApis_[hostApisCount_]->info.deviceCount;
+ deviceCount_ += hostApis_[hostApisCount_]->info.deviceCount;
+
+ ++hostApisCount_;
+ }
+ }
+
+ return result;
+
+error:
+ TerminateHostApis();
+ return result;
+}
+
+
+/*
+ FindHostApi() finds the index of the host api to which
+ <device> belongs and returns it. if <hostSpecificDeviceIndex> is
+ non-null, the host specific device index is returned in it.
+ returns -1 if <device> is out of range.
+
+*/
+static int FindHostApi( PaDeviceIndex device, int *hostSpecificDeviceIndex )
+{
+ int i=0;
+
+ if( !PA_IS_INITIALISED_ )
+ return -1;
+
+ if( device < 0 )
+ return -1;
+
+ while( i < hostApisCount_
+ && device >= hostApis_[i]->info.deviceCount )
+ {
+
+ device -= hostApis_[i]->info.deviceCount;
+ ++i;
+ }
+
+ if( i >= hostApisCount_ )
+ return -1;
+
+ if( hostSpecificDeviceIndex )
+ *hostSpecificDeviceIndex = device;
+
+ return i;
+}
+
+
+static void AddOpenStream( PaStream* stream )
+{
+ ((PaUtilStreamRepresentation*)stream)->nextOpenStream = firstOpenStream_;
+ firstOpenStream_ = (PaUtilStreamRepresentation*)stream;
+}
+
+
+static void RemoveOpenStream( PaStream* stream )
+{
+ PaUtilStreamRepresentation *previous = NULL;
+ PaUtilStreamRepresentation *current = firstOpenStream_;
+
+ while( current != NULL )
+ {
+ if( ((PaStream*)current) == stream )
+ {
+ if( previous == NULL )
+ {
+ firstOpenStream_ = current->nextOpenStream;
+ }
+ else
+ {
+ previous->nextOpenStream = current->nextOpenStream;
+ }
+ return;
+ }
+ else
+ {
+ previous = current;
+ current = current->nextOpenStream;
+ }
+ }
+}
+
+
+static void CloseOpenStreams( void )
+{
+ /* we call Pa_CloseStream() here to ensure that the same destruction
+ logic is used for automatically closed streams */
+
+ while( firstOpenStream_ != NULL )
+ Pa_CloseStream( firstOpenStream_ );
+}
+
+
+PaError Pa_Initialize( void )
+{
+ PaError result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint( "Pa_Initialize called.\n" );
+#endif
+
+ if( PA_IS_INITIALISED_ )
+ {
+ ++initializationCount_;
+ result = paNoError;
+ }
+ else
+ {
+ PA_VALIDATE_TYPE_SIZES;
+ PA_VALIDATE_ENDIANNESS;
+
+ PaUtil_InitializeClock();
+ PaUtil_ResetTraceMessages();
+
+ result = InitializeHostApis();
+ if( result == paNoError )
+ ++initializationCount_;
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint( "Pa_Initialize returned:\n" );
+ PaUtil_DebugPrint( "\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_Terminate( void )
+{
+ PaError result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_Terminate called.\n" );
+#endif
+
+ if( PA_IS_INITIALISED_ )
+ {
+ if( --initializationCount_ == 0 )
+ {
+ CloseOpenStreams();
+
+ TerminateHostApis();
+
+ PaUtil_DumpTraceMessages();
+ }
+ result = paNoError;
+ }
+ else
+ {
+ result= paNotInitialized;
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_Terminate returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+const PaHostErrorInfo* Pa_GetLastHostErrorInfo( void )
+{
+ return &lastHostErrorInfo_;
+}
+
+
+const char *Pa_GetErrorText( PaError errorCode )
+{
+ const char *result;
+
+ switch( errorCode )
+ {
+ case paNoError: result = "Success"; break;
+ case paNotInitialized: result = "PortAudio not initialized"; break;
+ /** @todo could catenate the last host error text to result in the case of paUnanticipatedHostError */
+ case paUnanticipatedHostError: result = "Unanticipated host error"; break;
+ case paInvalidChannelCount: result = "Invalid number of channels"; break;
+ case paInvalidSampleRate: result = "Invalid sample rate"; break;
+ case paInvalidDevice: result = "Invalid device"; break;
+ case paInvalidFlag: result = "Invalid flag"; break;
+ case paSampleFormatNotSupported: result = "Sample format not supported"; break;
+ case paBadIODeviceCombination: result = "Illegal combination of I/O devices"; break;
+ case paInsufficientMemory: result = "Insufficient memory"; break;
+ case paBufferTooBig: result = "Buffer too big"; break;
+ case paBufferTooSmall: result = "Buffer too small"; break;
+ case paNullCallback: result = "No callback routine specified"; break;
+ case paBadStreamPtr: result = "Invalid stream pointer"; break;
+ case paTimedOut: result = "Wait timed out"; break;
+ case paInternalError: result = "Internal PortAudio error"; break;
+ case paDeviceUnavailable: result = "Device unavailable"; break;
+ case paIncompatibleHostApiSpecificStreamInfo: result = "Incompatible host API specific stream info"; break;
+ case paStreamIsStopped: result = "Stream is stopped"; break;
+ case paStreamIsNotStopped: result = "Stream is not stopped"; break;
+ case paInputOverflowed: result = "Input overflowed"; break;
+ case paOutputUnderflowed: result = "Output underflowed"; break;
+ case paHostApiNotFound: result = "Host API not found"; break;
+ case paInvalidHostApi: result = "Invalid host API"; break;
+ case paCanNotReadFromACallbackStream: result = "Can't read from a callback stream"; break;
+ case paCanNotWriteToACallbackStream: result = "Can't write to a callback stream"; break;
+ case paCanNotReadFromAnOutputOnlyStream: result = "Can't read from an output only stream"; break;
+ case paCanNotWriteToAnInputOnlyStream: result = "Can't write to an input only stream"; break;
+ default: result = "Illegal error number"; break;
+ }
+ return result;
+}
+
+
+PaHostApiIndex Pa_HostApiTypeIdToHostApiIndex( PaHostApiTypeId type )
+{
+ PaHostApiIndex result;
+ int i;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_HostApiTypeIdToHostApiIndex called:\n" );
+ PaUtil_DebugPrint("\tPaHostApiTypeId type: %d\n", type );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+ }
+ else
+ {
+ result = paHostApiNotFound;
+
+ for( i=0; i < hostApisCount_; ++i )
+ {
+ if( hostApis_[i]->info.type == type )
+ {
+ result = i;
+ break;
+ }
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_HostApiTypeIdToHostApiIndex returned:\n" );
+ if( result < 0 )
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+ else
+ PaUtil_DebugPrint("\tPaHostApiIndex: %d\n\n", result );
+#endif
+
+ return result;
+}
+
+
+PaError PaUtil_GetHostApiRepresentation( struct PaUtilHostApiRepresentation **hostApi,
+ PaHostApiTypeId type )
+{
+ PaError result;
+ int i;
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+ }
+ else
+ {
+ result = paHostApiNotFound;
+
+ for( i=0; i < hostApisCount_; ++i )
+ {
+ if( hostApis_[i]->info.type == type )
+ {
+ *hostApi = hostApis_[i];
+ result = paNoError;
+ break;
+ }
+ }
+ }
+
+ return result;
+}
+
+
+PaError PaUtil_DeviceIndexToHostApiDeviceIndex(
+ PaDeviceIndex *hostApiDevice, PaDeviceIndex device, struct PaUtilHostApiRepresentation *hostApi )
+{
+ PaError result;
+ PaDeviceIndex x;
+
+ x = device - hostApi->privatePaFrontInfo.baseDeviceIndex;
+
+ if( x < 0 || x >= hostApi->info.deviceCount )
+ {
+ result = paInvalidDevice;
+ }
+ else
+ {
+ *hostApiDevice = x;
+ result = paNoError;
+ }
+
+ return result;
+}
+
+
+PaHostApiIndex Pa_GetHostApiCount( void )
+{
+ int result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetHostApiCount called.\n" );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+ }
+ else
+ {
+ result = hostApisCount_;
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetHostApiCount returned:\n" );
+ if( result < 0 )
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+ else
+ PaUtil_DebugPrint("\tPaHostApiIndex %d\n\n", result );
+#endif
+
+ return result;
+}
+
+
+PaHostApiIndex Pa_GetDefaultHostApi( void )
+{
+ int result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDefaultHostApi called.\n" );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+ }
+ else
+ {
+ result = paDefaultHostApiIndex;
+
+ /* internal consistency check: make sure that the default host api
+ index is within range */
+
+ if( result < 0 || result >= hostApisCount_ )
+ {
+ result = paInternalError;
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDefaultHostApi returned:\n" );
+ if( result < 0 )
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+ else
+ PaUtil_DebugPrint("\tPaHostApiIndex %d\n\n", result );
+#endif
+
+ return result;
+}
+
+
+const PaHostApiInfo* Pa_GetHostApiInfo( PaHostApiIndex hostApi )
+{
+ PaHostApiInfo *info;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetHostApiInfo called:\n" );
+ PaUtil_DebugPrint("\tPaHostApiIndex hostApi: %d\n", hostApi );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ info = NULL;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetHostApiInfo returned:\n" );
+ PaUtil_DebugPrint("\tPaHostApiInfo*: NULL [ PortAudio not initialized ]\n\n" );
+#endif
+
+ }
+ else if( hostApi < 0 || hostApi >= hostApisCount_ )
+ {
+ info = NULL;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetHostApiInfo returned:\n" );
+ PaUtil_DebugPrint("\tPaHostApiInfo*: NULL [ hostApi out of range ]\n\n" );
+#endif
+
+ }
+ else
+ {
+ info = &hostApis_[hostApi]->info;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetHostApiInfo returned:\n" );
+ PaUtil_DebugPrint("\tPaHostApiInfo*: 0x%p\n", info );
+ PaUtil_DebugPrint("\t{" );
+ PaUtil_DebugPrint("\t\tint structVersion: %d\n", info->structVersion );
+ PaUtil_DebugPrint("\t\tPaHostApiTypeId type: %d\n", info->type );
+ PaUtil_DebugPrint("\t\tconst char *name: %s\n\n", info->name );
+ PaUtil_DebugPrint("\t}\n\n" );
+#endif
+
+ }
+
+ return info;
+}
+
+
+PaDeviceIndex Pa_HostApiDeviceIndexToDeviceIndex( PaHostApiIndex hostApi, int hostApiDeviceIndex )
+{
+ PaDeviceIndex result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_HostApiDeviceIndexToPaDeviceIndex called:\n" );
+ PaUtil_DebugPrint("\tPaHostApiIndex hostApi: %d\n", hostApi );
+ PaUtil_DebugPrint("\tint hostApiDeviceIndex: %d\n", hostApiDeviceIndex );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+ }
+ else
+ {
+ if( hostApi < 0 || hostApi >= hostApisCount_ )
+ {
+ result = paInvalidHostApi;
+ }
+ else
+ {
+ if( hostApiDeviceIndex < 0 ||
+ hostApiDeviceIndex >= hostApis_[hostApi]->info.deviceCount )
+ {
+ result = paInvalidDevice;
+ }
+ else
+ {
+ result = hostApis_[hostApi]->privatePaFrontInfo.baseDeviceIndex + hostApiDeviceIndex;
+ }
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_HostApiDeviceIndexToPaDeviceIndex returned:\n" );
+ if( result < 0 )
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+ else
+ PaUtil_DebugPrint("\tPaDeviceIndex: %d\n\n", result );
+#endif
+
+ return result;
+}
+
+
+PaDeviceIndex Pa_GetDeviceCount( void )
+{
+ PaDeviceIndex result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDeviceCount called.\n" );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+ }
+ else
+ {
+ result = deviceCount_;
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDeviceCount returned:\n" );
+ if( result < 0 )
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+ else
+ PaUtil_DebugPrint("\tPaDeviceIndex: %d\n\n", result );
+#endif
+
+ return result;
+}
+
+
+PaDeviceIndex Pa_GetDefaultInputDevice( void )
+{
+ PaHostApiIndex hostApi;
+ PaDeviceIndex result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDefaultInputDevice called.\n" );
+#endif
+
+ hostApi = Pa_GetDefaultHostApi();
+ if( hostApi < 0 )
+ {
+ result = paNoDevice;
+ }
+ else
+ {
+ result = hostApis_[hostApi]->info.defaultInputDevice;
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDefaultInputDevice returned:\n" );
+ PaUtil_DebugPrint("\tPaDeviceIndex: %d\n\n", result );
+#endif
+
+ return result;
+}
+
+
+PaDeviceIndex Pa_GetDefaultOutputDevice( void )
+{
+ PaHostApiIndex hostApi;
+ PaDeviceIndex result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDefaultOutputDevice called.\n" );
+#endif
+
+ hostApi = Pa_GetDefaultHostApi();
+ if( hostApi < 0 )
+ {
+ result = paNoDevice;
+ }
+ else
+ {
+ result = hostApis_[hostApi]->info.defaultOutputDevice;
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDefaultOutputDevice returned:\n" );
+ PaUtil_DebugPrint("\tPaDeviceIndex: %d\n\n", result );
+#endif
+
+ return result;
+}
+
+
+const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceIndex device )
+{
+ int hostSpecificDeviceIndex;
+ int hostApiIndex = FindHostApi( device, &hostSpecificDeviceIndex );
+ PaDeviceInfo *result;
+
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDeviceInfo called:\n" );
+ PaUtil_DebugPrint("\tPaDeviceIndex device: %d\n", device );
+#endif
+
+ if( hostApiIndex < 0 )
+ {
+ result = NULL;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDeviceInfo returned:\n" );
+ PaUtil_DebugPrint("\tPaDeviceInfo* NULL [ invalid device index ]\n\n" );
+#endif
+
+ }
+ else
+ {
+ result = hostApis_[hostApiIndex]->deviceInfos[ hostSpecificDeviceIndex ];
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetDeviceInfo returned:\n" );
+ PaUtil_DebugPrint("\tPaDeviceInfo*: 0x%p:\n", result );
+ PaUtil_DebugPrint("\t{\n" );
+
+ PaUtil_DebugPrint("\t\tint structVersion: %d\n", result->structVersion );
+ PaUtil_DebugPrint("\t\tconst char *name: %s\n", result->name );
+ PaUtil_DebugPrint("\t\tPaHostApiIndex hostApi: %d\n", result->hostApi );
+ PaUtil_DebugPrint("\t\tint maxInputChannels: %d\n", result->maxInputChannels );
+ PaUtil_DebugPrint("\t\tint maxOutputChannels: %d\n", result->maxOutputChannels );
+ PaUtil_DebugPrint("\t}\n\n" );
+#endif
+
+ }
+
+ return result;
+}
+
+
+/*
+ SampleFormatIsValid() returns 1 if sampleFormat is a sample format
+ defined in portaudio.h, or 0 otherwise.
+*/
+static int SampleFormatIsValid( PaSampleFormat format )
+{
+ switch( format & ~paNonInterleaved )
+ {
+ case paFloat32: return 1;
+ case paInt16: return 1;
+ case paInt32: return 1;
+ case paInt24: return 1;
+ case paInt8: return 1;
+ case paUInt8: return 1;
+ case paCustomFormat: return 1;
+ default: return 0;
+ }
+}
+
+/*
+ NOTE: make sure this validation list is kept syncronised with the one in
+ pa_hostapi.h
+
+ ValidateOpenStreamParameters() checks that parameters to Pa_OpenStream()
+ conform to the expected values as described below. This function is
+ also designed to be used with the proposed Pa_IsFormatSupported() function.
+
+ There are basically two types of validation that could be performed:
+ Generic conformance validation, and device capability mismatch
+ validation. This function performs only generic conformance validation.
+ Validation that would require knowledge of device capabilities is
+ not performed because of potentially complex relationships between
+ combinations of parameters - for example, even if the sampleRate
+ seems ok, it might not be for a duplex stream - we have no way of
+ checking this in an API-neutral way, so we don't try.
+
+ On success the function returns PaNoError and fills in hostApi,
+ hostApiInputDeviceID, and hostApiOutputDeviceID fields. On failure
+ the function returns an error code indicating the first encountered
+ parameter error.
+
+
+ If ValidateOpenStreamParameters() returns paNoError, the following
+ assertions are guaranteed to be true.
+
+ - at least one of inputParameters & outputParmeters is valid (not NULL)
+
+ - if inputParameters & outputParmeters are both valid, that
+ inputParameters->device & outputParmeters->device both use the same host api
+
+ PaDeviceIndex inputParameters->device
+ - is within range (0 to Pa_GetDeviceCount-1) Or:
+ - is paUseHostApiSpecificDeviceSpecification and
+ inputParameters->hostApiSpecificStreamInfo is non-NULL and refers
+ to a valid host api
+
+ int inputParameters->channelCount
+ - if inputParameters->device is not paUseHostApiSpecificDeviceSpecification, channelCount is > 0
+ - upper bound is NOT validated against device capabilities
+
+ PaSampleFormat inputParameters->sampleFormat
+ - is one of the sample formats defined in portaudio.h
+
+ void *inputParameters->hostApiSpecificStreamInfo
+ - if supplied its hostApi field matches the input device's host Api
+
+ PaDeviceIndex outputParmeters->device
+ - is within range (0 to Pa_GetDeviceCount-1)
+
+ int outputParmeters->channelCount
+ - if inputDevice is valid, channelCount is > 0
+ - upper bound is NOT validated against device capabilities
+
+ PaSampleFormat outputParmeters->sampleFormat
+ - is one of the sample formats defined in portaudio.h
+
+ void *outputParmeters->hostApiSpecificStreamInfo
+ - if supplied its hostApi field matches the output device's host Api
+
+ double sampleRate
+ - is not an 'absurd' rate (less than 1000. or greater than 200000.)
+ - sampleRate is NOT validated against device capabilities
+
+ PaStreamFlags streamFlags
+ - unused platform neutral flags are zero
+ - paNeverDropInput is only used for full-duplex callback streams with
+ variable buffer size (paFramesPerBufferUnspecified)
+*/
+static PaError ValidateOpenStreamParameters(
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ PaUtilHostApiRepresentation **hostApi,
+ PaDeviceIndex *hostApiInputDevice,
+ PaDeviceIndex *hostApiOutputDevice )
+{
+ int inputHostApiIndex = -1, /* Surpress uninitialised var warnings: compiler does */
+ outputHostApiIndex = -1; /* not see that if inputParameters and outputParame- */
+ /* ters are both nonzero, these indices are set. */
+
+ if( (inputParameters == NULL) && (outputParameters == NULL) )
+ {
+ return paInvalidDevice; /** @todo should be a new error code "invalid device parameters" or something */
+ }
+ else
+ {
+ if( inputParameters == NULL )
+ {
+ *hostApiInputDevice = paNoDevice;
+ }
+ else if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ {
+ if( inputParameters->hostApiSpecificStreamInfo )
+ {
+ inputHostApiIndex = Pa_HostApiTypeIdToHostApiIndex(
+ ((PaUtilHostApiSpecificStreamInfoHeader*)inputParameters->hostApiSpecificStreamInfo)->hostApiType );
+
+ if( inputHostApiIndex != -1 )
+ {
+ *hostApiInputDevice = paUseHostApiSpecificDeviceSpecification;
+ *hostApi = hostApis_[inputHostApiIndex];
+ }
+ else
+ {
+ return paInvalidDevice;
+ }
+ }
+ else
+ {
+ return paInvalidDevice;
+ }
+ }
+ else
+ {
+ if( inputParameters->device < 0 || inputParameters->device >= deviceCount_ )
+ return paInvalidDevice;
+
+ inputHostApiIndex = FindHostApi( inputParameters->device, hostApiInputDevice );
+ if( inputHostApiIndex < 0 )
+ return paInternalError;
+
+ *hostApi = hostApis_[inputHostApiIndex];
+
+ if( inputParameters->channelCount <= 0 )
+ return paInvalidChannelCount;
+
+ if( !SampleFormatIsValid( inputParameters->sampleFormat ) )
+ return paSampleFormatNotSupported;
+
+ if( inputParameters->hostApiSpecificStreamInfo != NULL )
+ {
+ if( ((PaUtilHostApiSpecificStreamInfoHeader*)inputParameters->hostApiSpecificStreamInfo)->hostApiType
+ != (*hostApi)->info.type )
+ return paIncompatibleHostApiSpecificStreamInfo;
+ }
+ }
+
+ if( outputParameters == NULL )
+ {
+ *hostApiOutputDevice = paNoDevice;
+ }
+ else if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ {
+ if( outputParameters->hostApiSpecificStreamInfo )
+ {
+ outputHostApiIndex = Pa_HostApiTypeIdToHostApiIndex(
+ ((PaUtilHostApiSpecificStreamInfoHeader*)outputParameters->hostApiSpecificStreamInfo)->hostApiType );
+
+ if( outputHostApiIndex != -1 )
+ {
+ *hostApiOutputDevice = paUseHostApiSpecificDeviceSpecification;
+ *hostApi = hostApis_[outputHostApiIndex];
+ }
+ else
+ {
+ return paInvalidDevice;
+ }
+ }
+ else
+ {
+ return paInvalidDevice;
+ }
+ }
+ else
+ {
+ if( outputParameters->device < 0 || outputParameters->device >= deviceCount_ )
+ return paInvalidDevice;
+
+ outputHostApiIndex = FindHostApi( outputParameters->device, hostApiOutputDevice );
+ if( outputHostApiIndex < 0 )
+ return paInternalError;
+
+ *hostApi = hostApis_[outputHostApiIndex];
+
+ if( outputParameters->channelCount <= 0 )
+ return paInvalidChannelCount;
+
+ if( !SampleFormatIsValid( outputParameters->sampleFormat ) )
+ return paSampleFormatNotSupported;
+
+ if( outputParameters->hostApiSpecificStreamInfo != NULL )
+ {
+ if( ((PaUtilHostApiSpecificStreamInfoHeader*)outputParameters->hostApiSpecificStreamInfo)->hostApiType
+ != (*hostApi)->info.type )
+ return paIncompatibleHostApiSpecificStreamInfo;
+ }
+ }
+
+ if( (inputParameters != NULL) && (outputParameters != NULL) )
+ {
+ /* ensure that both devices use the same API */
+ if( inputHostApiIndex != outputHostApiIndex )
+ return paBadIODeviceCombination;
+ }
+ }
+
+
+ /* Check for absurd sample rates. */
+ if( (sampleRate < 1000.0) || (sampleRate > 200000.0) )
+ return paInvalidSampleRate;
+
+ if( ((streamFlags & ~paPlatformSpecificFlags) & ~(paClipOff | paDitherOff | paNeverDropInput | paPrimeOutputBuffersUsingStreamCallback ) ) != 0 )
+ return paInvalidFlag;
+
+ if( streamFlags & paNeverDropInput )
+ {
+ /* must be a callback stream */
+ if( !streamCallback )
+ return paInvalidFlag;
+
+ /* must be a full duplex stream */
+ if( (inputParameters == NULL) || (outputParameters == NULL) )
+ return paInvalidFlag;
+
+ /* must use paFramesPerBufferUnspecified */
+ if( framesPerBuffer != paFramesPerBufferUnspecified )
+ return paInvalidFlag;
+ }
+
+ return paNoError;
+}
+
+
+PaError Pa_IsFormatSupported( const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate )
+{
+ PaError result;
+ PaUtilHostApiRepresentation *hostApi;
+ PaDeviceIndex hostApiInputDevice, hostApiOutputDevice;
+ PaStreamParameters hostApiInputParameters, hostApiOutputParameters;
+ PaStreamParameters *hostApiInputParametersPtr, *hostApiOutputParametersPtr;
+
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_IsFormatSupported called:\n" );
+
+ if( inputParameters == NULL ){
+ PaUtil_DebugPrint("\tPaStreamParameters *inputParameters: NULL\n" );
+ }else{
+ PaUtil_DebugPrint("\tPaStreamParameters *inputParameters: 0x%p\n", inputParameters );
+ PaUtil_DebugPrint("\tPaDeviceIndex inputParameters->device: %d\n", inputParameters->device );
+ PaUtil_DebugPrint("\tint inputParameters->channelCount: %d\n", inputParameters->channelCount );
+ PaUtil_DebugPrint("\tPaSampleFormat inputParameters->sampleFormat: %d\n", inputParameters->sampleFormat );
+ PaUtil_DebugPrint("\tPaTime inputParameters->suggestedLatency: %f\n", inputParameters->suggestedLatency );
+ PaUtil_DebugPrint("\tvoid *inputParameters->hostApiSpecificStreamInfo: 0x%p\n", inputParameters->hostApiSpecificStreamInfo );
+ }
+
+ if( outputParameters == NULL ){
+ PaUtil_DebugPrint("\tPaStreamParameters *outputParameters: NULL\n" );
+ }else{
+ PaUtil_DebugPrint("\tPaStreamParameters *outputParameters: 0x%p\n", outputParameters );
+ PaUtil_DebugPrint("\tPaDeviceIndex outputParameters->device: %d\n", outputParameters->device );
+ PaUtil_DebugPrint("\tint outputParameters->channelCount: %d\n", outputParameters->channelCount );
+ PaUtil_DebugPrint("\tPaSampleFormat outputParameters->sampleFormat: %d\n", outputParameters->sampleFormat );
+ PaUtil_DebugPrint("\tPaTime outputParameters->suggestedLatency: %f\n", outputParameters->suggestedLatency );
+ PaUtil_DebugPrint("\tvoid *outputParameters->hostApiSpecificStreamInfo: 0x%p\n", outputParameters->hostApiSpecificStreamInfo );
+ }
+
+ PaUtil_DebugPrint("\tdouble sampleRate: %g\n", sampleRate );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_IsFormatSupported returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+ return result;
+ }
+
+ result = ValidateOpenStreamParameters( inputParameters,
+ outputParameters,
+ sampleRate, 0, paNoFlag, 0,
+ &hostApi,
+ &hostApiInputDevice,
+ &hostApiOutputDevice );
+ if( result != paNoError )
+ {
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_IsFormatSupported returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+ return result;
+ }
+
+
+ if( inputParameters )
+ {
+ hostApiInputParameters.device = hostApiInputDevice;
+ hostApiInputParameters.channelCount = inputParameters->channelCount;
+ hostApiInputParameters.sampleFormat = inputParameters->sampleFormat;
+ hostApiInputParameters.suggestedLatency = inputParameters->suggestedLatency;
+ hostApiInputParameters.hostApiSpecificStreamInfo = inputParameters->hostApiSpecificStreamInfo;
+ hostApiInputParametersPtr = &hostApiInputParameters;
+ }
+ else
+ {
+ hostApiInputParametersPtr = NULL;
+ }
+
+ if( outputParameters )
+ {
+ hostApiOutputParameters.device = hostApiOutputDevice;
+ hostApiOutputParameters.channelCount = outputParameters->channelCount;
+ hostApiOutputParameters.sampleFormat = outputParameters->sampleFormat;
+ hostApiOutputParameters.suggestedLatency = outputParameters->suggestedLatency;
+ hostApiOutputParameters.hostApiSpecificStreamInfo = outputParameters->hostApiSpecificStreamInfo;
+ hostApiOutputParametersPtr = &hostApiOutputParameters;
+ }
+ else
+ {
+ hostApiOutputParametersPtr = NULL;
+ }
+
+ result = hostApi->IsFormatSupported( hostApi,
+ hostApiInputParametersPtr, hostApiOutputParametersPtr,
+ sampleRate );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenStream returned:\n" );
+ if( result == paFormatIsSupported )
+ PaUtil_DebugPrint("\tPaError: 0 [ paFormatIsSupported ]\n\n" );
+ else
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_OpenStream( PaStream** stream,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData )
+{
+ PaError result;
+ PaUtilHostApiRepresentation *hostApi;
+ PaDeviceIndex hostApiInputDevice, hostApiOutputDevice;
+ PaStreamParameters hostApiInputParameters, hostApiOutputParameters;
+ PaStreamParameters *hostApiInputParametersPtr, *hostApiOutputParametersPtr;
+
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenStream called:\n" );
+ PaUtil_DebugPrint("\tPaStream** stream: 0x%p\n", stream );
+
+ if( inputParameters == NULL ){
+ PaUtil_DebugPrint("\tPaStreamParameters *inputParameters: NULL\n" );
+ }else{
+ PaUtil_DebugPrint("\tPaStreamParameters *inputParameters: 0x%p\n", inputParameters );
+ PaUtil_DebugPrint("\tPaDeviceIndex inputParameters->device: %d\n", inputParameters->device );
+ PaUtil_DebugPrint("\tint inputParameters->channelCount: %d\n", inputParameters->channelCount );
+ PaUtil_DebugPrint("\tPaSampleFormat inputParameters->sampleFormat: %d\n", inputParameters->sampleFormat );
+ PaUtil_DebugPrint("\tPaTime inputParameters->suggestedLatency: %f\n", inputParameters->suggestedLatency );
+ PaUtil_DebugPrint("\tvoid *inputParameters->hostApiSpecificStreamInfo: 0x%p\n", inputParameters->hostApiSpecificStreamInfo );
+ }
+
+ if( outputParameters == NULL ){
+ PaUtil_DebugPrint("\tPaStreamParameters *outputParameters: NULL\n" );
+ }else{
+ PaUtil_DebugPrint("\tPaStreamParameters *outputParameters: 0x%p\n", outputParameters );
+ PaUtil_DebugPrint("\tPaDeviceIndex outputParameters->device: %d\n", outputParameters->device );
+ PaUtil_DebugPrint("\tint outputParameters->channelCount: %d\n", outputParameters->channelCount );
+ PaUtil_DebugPrint("\tPaSampleFormat outputParameters->sampleFormat: %d\n", outputParameters->sampleFormat );
+ PaUtil_DebugPrint("\tPaTime outputParameters->suggestedLatency: %f\n", outputParameters->suggestedLatency );
+ PaUtil_DebugPrint("\tvoid *outputParameters->hostApiSpecificStreamInfo: 0x%p\n", outputParameters->hostApiSpecificStreamInfo );
+ }
+
+ PaUtil_DebugPrint("\tdouble sampleRate: %g\n", sampleRate );
+ PaUtil_DebugPrint("\tunsigned long framesPerBuffer: %d\n", framesPerBuffer );
+ PaUtil_DebugPrint("\tPaStreamFlags streamFlags: 0x%x\n", streamFlags );
+ PaUtil_DebugPrint("\tPaStreamCallback *streamCallback: 0x%p\n", streamCallback );
+ PaUtil_DebugPrint("\tvoid *userData: 0x%p\n", userData );
+#endif
+
+ if( !PA_IS_INITIALISED_ )
+ {
+ result = paNotInitialized;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenStream returned:\n" );
+ PaUtil_DebugPrint("\t*(PaStream** stream): undefined\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+ return result;
+ }
+
+ /* Check for parameter errors.
+ NOTE: make sure this validation list is kept syncronised with the one
+ in pa_hostapi.h
+ */
+
+ if( stream == NULL )
+ {
+ result = paBadStreamPtr;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenStream returned:\n" );
+ PaUtil_DebugPrint("\t*(PaStream** stream): undefined\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+ return result;
+ }
+
+ result = ValidateOpenStreamParameters( inputParameters,
+ outputParameters,
+ sampleRate, framesPerBuffer,
+ streamFlags, streamCallback,
+ &hostApi,
+ &hostApiInputDevice,
+ &hostApiOutputDevice );
+ if( result != paNoError )
+ {
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenStream returned:\n" );
+ PaUtil_DebugPrint("\t*(PaStream** stream): undefined\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+ return result;
+ }
+
+
+ if( inputParameters )
+ {
+ hostApiInputParameters.device = hostApiInputDevice;
+ hostApiInputParameters.channelCount = inputParameters->channelCount;
+ hostApiInputParameters.sampleFormat = inputParameters->sampleFormat;
+ hostApiInputParameters.suggestedLatency = inputParameters->suggestedLatency;
+ hostApiInputParameters.hostApiSpecificStreamInfo = inputParameters->hostApiSpecificStreamInfo;
+ hostApiInputParametersPtr = &hostApiInputParameters;
+ }
+ else
+ {
+ hostApiInputParametersPtr = NULL;
+ }
+
+ if( outputParameters )
+ {
+ hostApiOutputParameters.device = hostApiOutputDevice;
+ hostApiOutputParameters.channelCount = outputParameters->channelCount;
+ hostApiOutputParameters.sampleFormat = outputParameters->sampleFormat;
+ hostApiOutputParameters.suggestedLatency = outputParameters->suggestedLatency;
+ hostApiOutputParameters.hostApiSpecificStreamInfo = outputParameters->hostApiSpecificStreamInfo;
+ hostApiOutputParametersPtr = &hostApiOutputParameters;
+ }
+ else
+ {
+ hostApiOutputParametersPtr = NULL;
+ }
+
+ result = hostApi->OpenStream( hostApi, stream,
+ hostApiInputParametersPtr, hostApiOutputParametersPtr,
+ sampleRate, framesPerBuffer, streamFlags, streamCallback, userData );
+
+ if( result == paNoError )
+ AddOpenStream( *stream );
+
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenStream returned:\n" );
+ PaUtil_DebugPrint("\t*(PaStream** stream): 0x%p\n", *stream );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_OpenDefaultStream( PaStream** stream,
+ int inputChannelCount,
+ int outputChannelCount,
+ PaSampleFormat sampleFormat,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamCallback *streamCallback,
+ void *userData )
+{
+ PaError result;
+ PaStreamParameters hostApiInputParameters, hostApiOutputParameters;
+ PaStreamParameters *hostApiInputParametersPtr, *hostApiOutputParametersPtr;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenDefaultStream called:\n" );
+ PaUtil_DebugPrint("\tPaStream** stream: 0x%p\n", stream );
+ PaUtil_DebugPrint("\tint inputChannelCount: %d\n", inputChannelCount );
+ PaUtil_DebugPrint("\tint outputChannelCount: %d\n", outputChannelCount );
+ PaUtil_DebugPrint("\tPaSampleFormat sampleFormat: %d\n", sampleFormat );
+ PaUtil_DebugPrint("\tdouble sampleRate: %g\n", sampleRate );
+ PaUtil_DebugPrint("\tunsigned long framesPerBuffer: %d\n", framesPerBuffer );
+ PaUtil_DebugPrint("\tPaStreamCallback *streamCallback: 0x%p\n", streamCallback );
+ PaUtil_DebugPrint("\tvoid *userData: 0x%p\n", userData );
+#endif
+
+
+ if( inputChannelCount > 0 )
+ {
+ hostApiInputParameters.device = Pa_GetDefaultInputDevice();
+ hostApiInputParameters.channelCount = inputChannelCount;
+ hostApiInputParameters.sampleFormat = sampleFormat;
+ /* defaultHighInputLatency is used below instead of
+ defaultLowInputLatency because it is more important for the default
+ stream to work reliably than it is for it to work with the lowest
+ latency.
+ */
+ hostApiInputParameters.suggestedLatency =
+ Pa_GetDeviceInfo( hostApiInputParameters.device )->defaultHighInputLatency;
+ hostApiInputParameters.hostApiSpecificStreamInfo = NULL;
+ hostApiInputParametersPtr = &hostApiInputParameters;
+ }
+ else
+ {
+ hostApiInputParametersPtr = NULL;
+ }
+
+ if( outputChannelCount > 0 )
+ {
+ hostApiOutputParameters.device = Pa_GetDefaultOutputDevice();
+ hostApiOutputParameters.channelCount = outputChannelCount;
+ hostApiOutputParameters.sampleFormat = sampleFormat;
+ /* defaultHighOutputLatency is used below instead of
+ defaultLowOutputLatency because it is more important for the default
+ stream to work reliably than it is for it to work with the lowest
+ latency.
+ */
+ hostApiOutputParameters.suggestedLatency =
+ Pa_GetDeviceInfo( hostApiOutputParameters.device )->defaultHighOutputLatency;
+ hostApiOutputParameters.hostApiSpecificStreamInfo = NULL;
+ hostApiOutputParametersPtr = &hostApiOutputParameters;
+ }
+ else
+ {
+ hostApiOutputParametersPtr = NULL;
+ }
+
+
+ result = Pa_OpenStream(
+ stream, hostApiInputParametersPtr, hostApiOutputParametersPtr,
+ sampleRate, framesPerBuffer, paNoFlag, streamCallback, userData );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_OpenDefaultStream returned:\n" );
+ PaUtil_DebugPrint("\t*(PaStream** stream): 0x%p", *stream );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError PaUtil_ValidateStreamPointer( PaStream* stream )
+{
+ if( !PA_IS_INITIALISED_ ) return paNotInitialized;
+
+ if( stream == NULL ) return paBadStreamPtr;
+
+ if( ((PaUtilStreamRepresentation*)stream)->magic != PA_STREAM_MAGIC )
+ return paBadStreamPtr;
+
+ return paNoError;
+}
+
+
+PaError Pa_CloseStream( PaStream* stream )
+{
+ PaUtilStreamInterface *interface;
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_CloseStream called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ /* always remove the open stream from our list, even if this function
+ eventually returns an error. Otherwise CloseOpenStreams() will
+ get stuck in an infinite loop */
+ RemoveOpenStream( stream ); /* be sure to call this _before_ closing the stream */
+
+ if( result == paNoError )
+ {
+ interface = PA_STREAM_INTERFACE(stream);
+
+ /* abort the stream if it isn't stopped */
+ result = interface->IsStopped( stream );
+ if( result == 1 )
+ result = paNoError;
+ else if( result == 0 )
+ result = interface->Abort( stream );
+
+ if( result == paNoError ) /** @todo REVIEW: shouldn't we close anyway? */
+ result = interface->Close( stream );
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_CloseStream returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_SetStreamFinishedCallback( PaStream *stream, PaStreamFinishedCallback* streamFinishedCallback )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_SetStreamFinishedCallback called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+ PaUtil_DebugPrint("\tPaStreamFinishedCallback* streamFinishedCallback: 0x%p\n", streamFinishedCallback );
+#endif
+
+ if( result == paNoError )
+ {
+ result = PA_STREAM_INTERFACE(stream)->IsStopped( stream );
+ if( result == 0 )
+ {
+ result = paStreamIsNotStopped ;
+ }
+ if( result == 1 )
+ {
+ PA_STREAM_REP( stream )->streamFinishedCallback = streamFinishedCallback;
+ result = paNoError;
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_SetStreamFinishedCallback returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+
+}
+
+
+PaError Pa_StartStream( PaStream *stream )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_StartStream called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( result == paNoError )
+ {
+ result = PA_STREAM_INTERFACE(stream)->IsStopped( stream );
+ if( result == 0 )
+ {
+ result = paStreamIsNotStopped ;
+ }
+ else if( result == 1 )
+ {
+ result = PA_STREAM_INTERFACE(stream)->Start( stream );
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_StartStream returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_StopStream( PaStream *stream )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_StopStream called\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( result == paNoError )
+ {
+ result = PA_STREAM_INTERFACE(stream)->IsStopped( stream );
+ if( result == 0 )
+ {
+ result = PA_STREAM_INTERFACE(stream)->Stop( stream );
+ }
+ else if( result == 1 )
+ {
+ result = paStreamIsStopped;
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_StopStream returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_AbortStream( PaStream *stream )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_AbortStream called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( result == paNoError )
+ {
+ result = PA_STREAM_INTERFACE(stream)->IsStopped( stream );
+ if( result == 0 )
+ {
+ result = PA_STREAM_INTERFACE(stream)->Abort( stream );
+ }
+ else if( result == 1 )
+ {
+ result = paStreamIsStopped;
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_AbortStream returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_IsStreamStopped( PaStream *stream )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_IsStreamStopped called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( result == paNoError )
+ result = PA_STREAM_INTERFACE(stream)->IsStopped( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_IsStreamStopped returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_IsStreamActive( PaStream *stream )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_IsStreamActive called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( result == paNoError )
+ result = PA_STREAM_INTERFACE(stream)->IsActive( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_IsStreamActive returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+const PaStreamInfo* Pa_GetStreamInfo( PaStream *stream )
+{
+ PaError error = PaUtil_ValidateStreamPointer( stream );
+ const PaStreamInfo *result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamInfo called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( error != paNoError )
+ {
+ result = 0;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamInfo returned:\n" );
+ PaUtil_DebugPrint("\tconst PaStreamInfo*: 0 [PaError error:%d ( %s )]\n\n", result, error, Pa_GetErrorText( error ) );
+#endif
+
+ }
+ else
+ {
+ result = &PA_STREAM_REP( stream )->streamInfo;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamInfo returned:\n" );
+ PaUtil_DebugPrint("\tconst PaStreamInfo*: 0x%p:\n", result );
+ PaUtil_DebugPrint("\t{" );
+
+ PaUtil_DebugPrint("\t\tint structVersion: %d\n", result->structVersion );
+ PaUtil_DebugPrint("\t\tPaTime inputLatency: %f\n", result->inputLatency );
+ PaUtil_DebugPrint("\t\tPaTime outputLatency: %f\n", result->outputLatency );
+ PaUtil_DebugPrint("\t\tdouble sampleRate: %f\n", result->sampleRate );
+ PaUtil_DebugPrint("\t}\n\n" );
+#endif
+
+ }
+
+ return result;
+}
+
+
+PaTime Pa_GetStreamTime( PaStream *stream )
+{
+ PaError error = PaUtil_ValidateStreamPointer( stream );
+ PaTime result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamTime called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( error != paNoError )
+ {
+ result = 0;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamTime returned:\n" );
+ PaUtil_DebugPrint("\tPaTime: 0 [PaError error:%d ( %s )]\n\n", result, error, Pa_GetErrorText( error ) );
+#endif
+
+ }
+ else
+ {
+ result = PA_STREAM_INTERFACE(stream)->GetTime( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamTime returned:\n" );
+ PaUtil_DebugPrint("\tPaTime: %g\n\n", result );
+#endif
+
+ }
+
+ return result;
+}
+
+
+double Pa_GetStreamCpuLoad( PaStream* stream )
+{
+ PaError error = PaUtil_ValidateStreamPointer( stream );
+ double result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamCpuLoad called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( error != paNoError )
+ {
+
+ result = 0.0;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamCpuLoad returned:\n" );
+ PaUtil_DebugPrint("\tdouble: 0.0 [PaError error: %d ( %s )]\n\n", error, Pa_GetErrorText( error ) );
+#endif
+
+ }
+ else
+ {
+ result = PA_STREAM_INTERFACE(stream)->GetCpuLoad( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamCpuLoad returned:\n" );
+ PaUtil_DebugPrint("\tdouble: %g\n\n", result );
+#endif
+
+ }
+
+ return result;
+}
+
+
+PaError Pa_ReadStream( PaStream* stream,
+ void *buffer,
+ unsigned long frames )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_ReadStream called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( result == paNoError )
+ {
+ if( frames == 0 )
+ {
+ result = paInternalError; /** @todo should return a different error code */
+ }
+ else if( buffer == 0 )
+ {
+ result = paInternalError; /** @todo should return a different error code */
+ }
+ else
+ {
+ result = PA_STREAM_INTERFACE(stream)->IsStopped( stream );
+ if( result == 0 )
+ {
+ result = PA_STREAM_INTERFACE(stream)->Read( stream, buffer, frames );
+ }
+ else if( result == 1 )
+ {
+ result = paStreamIsStopped;
+ }
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_ReadStream returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+
+PaError Pa_WriteStream( PaStream* stream,
+ const void *buffer,
+ unsigned long frames )
+{
+ PaError result = PaUtil_ValidateStreamPointer( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_WriteStream called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( result == paNoError )
+ {
+ if( frames == 0 )
+ {
+ result = paInternalError; /** @todo should return a different error code */
+ }
+ else if( buffer == 0 )
+ {
+ result = paInternalError; /** @todo should return a different error code */
+ }
+ else
+ {
+ result = PA_STREAM_INTERFACE(stream)->IsStopped( stream );
+ if( result == 0 )
+ {
+ result = PA_STREAM_INTERFACE(stream)->Write( stream, buffer, frames );
+ }
+ else if( result == 1 )
+ {
+ result = paStreamIsStopped;
+ }
+ }
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_WriteStream returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return result;
+}
+
+signed long Pa_GetStreamReadAvailable( PaStream* stream )
+{
+ PaError error = PaUtil_ValidateStreamPointer( stream );
+ signed long result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamReadAvailable called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( error != paNoError )
+ {
+ result = 0;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamReadAvailable returned:\n" );
+ PaUtil_DebugPrint("\tunsigned long: 0 [ PaError error: %d ( %s ) ]\n\n", error, Pa_GetErrorText( error ) );
+#endif
+
+ }
+ else
+ {
+ result = PA_STREAM_INTERFACE(stream)->GetReadAvailable( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamReadAvailable returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ }
+
+ return result;
+}
+
+
+signed long Pa_GetStreamWriteAvailable( PaStream* stream )
+{
+ PaError error = PaUtil_ValidateStreamPointer( stream );
+ signed long result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamWriteAvailable called:\n" );
+ PaUtil_DebugPrint("\tPaStream* stream: 0x%p\n", stream );
+#endif
+
+ if( error != paNoError )
+ {
+ result = 0;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamWriteAvailable returned:\n" );
+ PaUtil_DebugPrint("\tunsigned long: 0 [ PaError error: %d ( %s ) ]\n\n", error, Pa_GetErrorText( error ) );
+#endif
+
+ }
+ else
+ {
+ result = PA_STREAM_INTERFACE(stream)->GetWriteAvailable( stream );
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetStreamWriteAvailable returned:\n" );
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ }
+
+ return result;
+}
+
+
+PaError Pa_GetSampleSize( PaSampleFormat format )
+{
+ int result;
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetSampleSize called:\n" );
+ PaUtil_DebugPrint("\tPaSampleFormat format: %d\n", format );
+#endif
+
+ switch( format & ~paNonInterleaved )
+ {
+
+ case paUInt8:
+ case paInt8:
+ result = 1;
+ break;
+
+ case paInt16:
+ result = 2;
+ break;
+
+ case paInt24:
+ result = 3;
+ break;
+
+ case paFloat32:
+ case paInt32:
+ result = 4;
+ break;
+
+ default:
+ result = paSampleFormatNotSupported;
+ break;
+ }
+
+#ifdef PA_LOG_API_CALLS
+ PaUtil_DebugPrint("Pa_GetSampleSize returned:\n" );
+ if( result > 0 )
+ PaUtil_DebugPrint("\tint: %d\n\n", result );
+ else
+ PaUtil_DebugPrint("\tPaError: %d ( %s )\n\n", result, Pa_GetErrorText( result ) );
+#endif
+
+ return (PaError) result;
+}
+
diff --git a/portaudio/pa_common/pa_hostapi.h b/portaudio/pa_common/pa_hostapi.h
new file mode 100644
index 0000000000000000000000000000000000000000..fec4e4871bbd7bce7a46237a139fee10644bdc8b
--- /dev/null
+++ b/portaudio/pa_common/pa_hostapi.h
@@ -0,0 +1,244 @@
+#ifndef PA_HOSTAPI_H
+#define PA_HOSTAPI_H
+/*
+ * $Id$
+ * Portable Audio I/O Library
+ * host api representation
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Interface used by pa_front to virtualize functions which operate on
+ host APIs.
+*/
+
+
+#include "portaudio.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+/** **FOR THE USE OF pa_front.c ONLY**
+ Do NOT use fields in this structure, they my change at any time.
+ Use functions defined in pa_util.h if you think you need functionality
+ which can be derived from here.
+*/
+typedef struct PaUtilPrivatePaFrontHostApiInfo {
+
+
+ unsigned long baseDeviceIndex;
+}PaUtilPrivatePaFrontHostApiInfo;
+
+
+/** The common header for all data structures whose pointers are passed through
+ the hostApiSpecificStreamInfo field of the PaStreamParameters structure.
+ Note that in order to keep the public PortAudio interface clean, this structure
+ is not used explicitly when declaring hostApiSpecificStreamInfo data structures.
+ However, some code in pa_front depends on the first 3 members being equivalent
+ with this structure.
+ @see PaStreamParameters
+*/
+typedef struct PaUtilHostApiSpecificStreamInfoHeader
+{
+ unsigned long size; /**< size of whole structure including this header */
+ PaHostApiTypeId hostApiType; /**< host API for which this data is intended */
+ unsigned long version; /**< structure version */
+} PaUtilHostApiSpecificStreamInfoHeader;
+
+
+
+/** A structure representing the interface to a host API. Contains both
+ concrete data and pointers to functions which implement the interface.
+*/
+typedef struct PaUtilHostApiRepresentation {
+ PaUtilPrivatePaFrontHostApiInfo privatePaFrontInfo;
+
+ /** The host api implementation should populate the info field. In the
+ case of info.defaultInputDevice and info.defaultOutputDevice the
+ values stored should be 0 based indices within the host api's own
+ device index range (0 to deviceCount). These values will be converted
+ to global device indices by pa_front after PaUtilHostApiInitializer()
+ returns.
+ */
+ PaHostApiInfo info;
+
+ PaDeviceInfo** deviceInfos;
+
+ /**
+ (*Terminate)() is guaranteed to be called with a valid <hostApi>
+ parameter, which was previously returned from the same implementation's
+ initializer.
+ */
+ void (*Terminate)( struct PaUtilHostApiRepresentation *hostApi );
+
+ /**
+ The inputParameters and outputParameters pointers should not be saved
+ as they will not remain valid after OpenStream is called.
+
+
+ The following guarantees are made about parameters to (*OpenStream)():
+
+ [NOTE: the following list up to *END PA FRONT VALIDATIONS* should be
+ kept in sync with the one for ValidateOpenStreamParameters and
+ Pa_OpenStream in pa_front.c]
+
+ PaHostApiRepresentation *hostApi
+ - is valid for this implementation
+
+ PaStream** stream
+ - is non-null
+
+ - at least one of inputParameters & outputParmeters is valid (not NULL)
+
+ - if inputParameters & outputParmeters are both valid, that
+ inputParameters->device & outputParmeters->device both use the same host api
+
+ PaDeviceIndex inputParameters->device
+ - is within range (0 to Pa_CountDevices-1) Or:
+ - is paUseHostApiSpecificDeviceSpecification and
+ inputParameters->hostApiSpecificStreamInfo is non-NULL and refers
+ to a valid host api
+
+ int inputParameters->numChannels
+ - if inputParameters->device is not paUseHostApiSpecificDeviceSpecification, numInputChannels is > 0
+ - upper bound is NOT validated against device capabilities
+
+ PaSampleFormat inputParameters->sampleFormat
+ - is one of the sample formats defined in portaudio.h
+
+ void *inputParameters->hostApiSpecificStreamInfo
+ - if supplied its hostApi field matches the input device's host Api
+
+ PaDeviceIndex outputParmeters->device
+ - is within range (0 to Pa_CountDevices-1)
+
+ int outputParmeters->numChannels
+ - if inputDevice is valid, numInputChannels is > 0
+ - upper bound is NOT validated against device capabilities
+
+ PaSampleFormat outputParmeters->sampleFormat
+ - is one of the sample formats defined in portaudio.h
+
+ void *outputParmeters->hostApiSpecificStreamInfo
+ - if supplied its hostApi field matches the output device's host Api
+
+ double sampleRate
+ - is not an 'absurd' rate (less than 1000. or greater than 200000.)
+ - sampleRate is NOT validated against device capabilities
+
+ PaStreamFlags streamFlags
+ - unused platform neutral flags are zero
+ - paNeverDropInput is only used for full-duplex callback streams
+ with variable buffer size (paFramesPerBufferUnspecified)
+
+ [*END PA FRONT VALIDATIONS*]
+
+
+ The following validations MUST be performed by (*OpenStream)():
+
+ - check that input device can support numInputChannels
+
+ - check that input device can support inputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+
+ - if inputStreamInfo is supplied, validate its contents,
+ or return an error if no inputStreamInfo is expected
+
+ - check that output device can support numOutputChannels
+
+ - check that output device can support outputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+
+ - if outputStreamInfo is supplied, validate its contents,
+ or return an error if no outputStreamInfo is expected
+
+ - if a full duplex stream is requested, check that the combination
+ of input and output parameters is supported
+
+ - check that the device supports sampleRate
+
+ - alter sampleRate to a close allowable rate if necessary
+
+ - validate inputLatency and outputLatency
+
+ - validate any platform specific flags, if flags are supplied they
+ must be valid.
+ */
+ PaError (*OpenStream)( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** stream,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerCallback,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData );
+
+
+ PaError (*IsFormatSupported)( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate );
+} PaUtilHostApiRepresentation;
+
+
+/** Prototype for the initialization function which must be implemented by every
+ host API.
+
+ @see paHostApiInitializers
+*/
+typedef PaError PaUtilHostApiInitializer( PaUtilHostApiRepresentation**, PaHostApiIndex );
+
+
+/** paHostApiInitializers is a NULL-terminated array of host API initialization
+ functions. These functions are called by pa_front to initialize the host APIs
+ when the client calls Pa_Initialize().
+
+ There is a platform specific file which defines paHostApiInitializers for that
+ platform, pa_win/pa_win_hostapis.c contains the Win32 definitions for example.
+*/
+extern PaUtilHostApiInitializer *paHostApiInitializers[];
+
+
+/** The index of the default host API in the paHostApiInitializers array.
+
+ There is a platform specific file which defines paDefaultHostApiIndex for that
+ platform, see pa_win/pa_win_hostapis.c for example.
+*/
+extern int paDefaultHostApiIndex;
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_HOSTAPI_H */
diff --git a/portaudio/pa_common/pa_process.c b/portaudio/pa_common/pa_process.c
new file mode 100644
index 0000000000000000000000000000000000000000..837bbef35b66bf1fcfee2e60fc75008b8f7cde76
--- /dev/null
+++ b/portaudio/pa_common/pa_process.c
@@ -0,0 +1,1763 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library
+ * streamCallback <-> host buffer processing adapter
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Buffer Processor implementation.
+
+ The code in this file is not optimised yet - although it's not clear that
+ it needs to be. there may appear to be redundancies
+ that could be factored into common functions, but the redundanceis are left
+ intentionally as each appearance may have different optimisation possibilities.
+
+ The optimisations which are planned involve only converting data in-place
+ where possible, rather than copying to the temp buffer(s).
+
+ Note that in the extreme case of being able to convert in-place, and there
+ being no conversion necessary there should be some code which short-circuits
+ the operation.
+
+ @todo Consider cache tilings for intereave<->deinterleave.
+
+ @todo implement timeInfo->currentTime int PaUtil_BeginBufferProcessing()
+
+ @todo specify and implement some kind of logical policy for handling the
+ underflow and overflow stream flags when the underflow/overflow overlaps
+ multiple user buffers/callbacks.
+
+ @todo provide support for priming the buffers with data from the callback.
+ The client interface is now implemented through PaUtil_SetNoInput()
+ which sets bp->hostInputChannels[0][0].data to zero. However this is
+ currently only implemented in NonAdaptingProcess(). It shouldn't be
+ needed for AdaptingInputOnlyProcess() (no priming should ever be
+ requested for AdaptingInputOnlyProcess()).
+ Not sure if additional work should be required to make it work with
+ AdaptingOutputOnlyProcess, but it definitely is required for
+ AdaptingProcess.
+
+ @todo implement PaUtil_SetNoOutput for AdaptingProcess
+
+ @todo don't allocate temp buffers for blocking streams unless they are
+ needed. At the moment they are needed, but perhaps for host APIs
+ where the implementation passes a buffer to the host they could be
+ used.
+*/
+
+
+#include <assert.h>
+#include <string.h> /* memset() */
+
+#include "pa_process.h"
+#include "pa_util.h"
+
+
+#define PA_FRAMES_PER_TEMP_BUFFER_WHEN_HOST_BUFFER_SIZE_IS_UNKNOWN_ 1024
+
+#define PA_MIN_( a, b ) ( ((a)<(b)) ? (a) : (b) )
+
+
+/* greatest common divisor - PGCD in French */
+static unsigned long GCD( unsigned long a, unsigned long b )
+{
+ return (b==0) ? a : GCD( b, a%b);
+}
+
+/* least common multiple - PPCM in French */
+static unsigned long LCM( unsigned long a, unsigned long b )
+{
+ return (a*b) / GCD(a,b);
+}
+
+#define PA_MAX_( a, b ) (((a) > (b)) ? (a) : (b))
+
+static unsigned long CalculateFrameShift( unsigned long M, unsigned long N )
+{
+ unsigned long result = 0;
+ unsigned long i;
+ unsigned long lcm;
+
+ assert( M > 0 );
+ assert( N > 0 );
+
+ lcm = LCM( M, N );
+ for( i = M; i < lcm; i += M )
+ result = PA_MAX_( result, i % N );
+
+ return result;
+}
+
+
+PaError PaUtil_InitializeBufferProcessor( PaUtilBufferProcessor* bp,
+ int inputChannelCount, PaSampleFormat userInputSampleFormat,
+ PaSampleFormat hostInputSampleFormat,
+ int outputChannelCount, PaSampleFormat userOutputSampleFormat,
+ PaSampleFormat hostOutputSampleFormat,
+ double sampleRate,
+ PaStreamFlags streamFlags,
+ unsigned long framesPerUserBuffer,
+ unsigned long framesPerHostBuffer,
+ PaUtilHostBufferSizeMode hostBufferSizeMode,
+ PaStreamCallback *streamCallback, void *userData )
+{
+ PaError result = paNoError;
+ PaError bytesPerSample;
+ unsigned long tempInputBufferSize, tempOutputBufferSize;
+
+ if( streamFlags & paNeverDropInput )
+ {
+ /* paNeverDropInput is only valid for full-duplex callback streams, with an unspecified number of frames per buffer. */
+ if( !streamCallback || !(inputChannelCount > 0 && outputChannelCount > 0) ||
+ framesPerUserBuffer != paFramesPerBufferUnspecified )
+ return paInvalidFlag;
+ }
+
+ /* initialize buffer ptrs to zero so they can be freed if necessary in error */
+ bp->tempInputBuffer = 0;
+ bp->tempInputBufferPtrs = 0;
+ bp->tempOutputBuffer = 0;
+ bp->tempOutputBufferPtrs = 0;
+
+ bp->framesPerUserBuffer = framesPerUserBuffer;
+ bp->framesPerHostBuffer = framesPerHostBuffer;
+
+ bp->inputChannelCount = inputChannelCount;
+ bp->outputChannelCount = outputChannelCount;
+
+ bp->hostBufferSizeMode = hostBufferSizeMode;
+
+ bp->hostInputChannels[0] = bp->hostInputChannels[1] = 0;
+ bp->hostOutputChannels[0] = bp->hostOutputChannels[1] = 0;
+
+ if( framesPerUserBuffer == 0 ) /* streamCallback will accept any buffer size */
+ {
+ bp->useNonAdaptingProcess = 1;
+ bp->initialFramesInTempInputBuffer = 0;
+ bp->initialFramesInTempOutputBuffer = 0;
+
+ if( hostBufferSizeMode == paUtilFixedHostBufferSize
+ || hostBufferSizeMode == paUtilBoundedHostBufferSize )
+ {
+ bp->framesPerTempBuffer = framesPerHostBuffer;
+ }
+ else /* unknown host buffer size */
+ {
+ bp->framesPerTempBuffer = PA_FRAMES_PER_TEMP_BUFFER_WHEN_HOST_BUFFER_SIZE_IS_UNKNOWN_;
+ }
+ }
+ else
+ {
+ bp->framesPerTempBuffer = framesPerUserBuffer;
+
+ if( hostBufferSizeMode == paUtilFixedHostBufferSize
+ && framesPerHostBuffer % framesPerUserBuffer == 0 )
+ {
+ bp->useNonAdaptingProcess = 1;
+ bp->initialFramesInTempInputBuffer = 0;
+ bp->initialFramesInTempOutputBuffer = 0;
+ }
+ else
+ {
+ bp->useNonAdaptingProcess = 0;
+
+ if( inputChannelCount > 0 && outputChannelCount > 0 )
+ {
+ /* full duplex */
+ if( hostBufferSizeMode == paUtilFixedHostBufferSize )
+ {
+ unsigned long frameShift =
+ CalculateFrameShift( framesPerHostBuffer, framesPerUserBuffer );
+
+ if( framesPerUserBuffer > framesPerHostBuffer )
+ {
+ bp->initialFramesInTempInputBuffer = frameShift;
+ bp->initialFramesInTempOutputBuffer = 0;
+ }
+ else
+ {
+ bp->initialFramesInTempInputBuffer = 0;
+ bp->initialFramesInTempOutputBuffer = frameShift;
+ }
+ }
+ else /* variable host buffer size, add framesPerUserBuffer latency */
+ {
+ bp->initialFramesInTempInputBuffer = 0;
+ bp->initialFramesInTempOutputBuffer = framesPerUserBuffer;
+ }
+ }
+ else
+ {
+ /* half duplex */
+ bp->initialFramesInTempInputBuffer = 0;
+ bp->initialFramesInTempOutputBuffer = 0;
+ }
+ }
+ }
+
+
+ bp->framesInTempInputBuffer = bp->initialFramesInTempInputBuffer;
+ bp->framesInTempOutputBuffer = bp->initialFramesInTempOutputBuffer;
+
+
+ if( inputChannelCount > 0 )
+ {
+ bytesPerSample = Pa_GetSampleSize( hostInputSampleFormat );
+ if( bytesPerSample > 0 )
+ {
+ bp->bytesPerHostInputSample = bytesPerSample;
+ }
+ else
+ {
+ result = bytesPerSample;
+ goto error;
+ }
+
+ bytesPerSample = Pa_GetSampleSize( userInputSampleFormat );
+ if( bytesPerSample > 0 )
+ {
+ bp->bytesPerUserInputSample = bytesPerSample;
+ }
+ else
+ {
+ result = bytesPerSample;
+ goto error;
+ }
+
+ bp->inputConverter =
+ PaUtil_SelectConverter( hostInputSampleFormat, userInputSampleFormat, streamFlags );
+
+ bp->inputZeroer = PaUtil_SelectZeroer( hostInputSampleFormat );
+
+ bp->userInputIsInterleaved = (userInputSampleFormat & paNonInterleaved)?0:1;
+
+
+ tempInputBufferSize =
+ bp->framesPerTempBuffer * bp->bytesPerUserInputSample * inputChannelCount;
+
+ bp->tempInputBuffer = PaUtil_AllocateMemory( tempInputBufferSize );
+ if( bp->tempInputBuffer == 0 )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ if( bp->framesInTempInputBuffer > 0 )
+ memset( bp->tempInputBuffer, 0, tempInputBufferSize );
+
+ if( userInputSampleFormat & paNonInterleaved )
+ {
+ bp->tempInputBufferPtrs =
+ (void **)PaUtil_AllocateMemory( sizeof(void*)*inputChannelCount );
+ if( bp->tempInputBufferPtrs == 0 )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+ }
+
+ bp->hostInputChannels[0] = (PaUtilChannelDescriptor*)
+ PaUtil_AllocateMemory( sizeof(PaUtilChannelDescriptor) * inputChannelCount * 2);
+ if( bp->hostInputChannels[0] == 0 )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ bp->hostInputChannels[1] = &bp->hostInputChannels[0][inputChannelCount];
+ }
+
+ if( outputChannelCount > 0 )
+ {
+ bytesPerSample = Pa_GetSampleSize( hostOutputSampleFormat );
+ if( bytesPerSample > 0 )
+ {
+ bp->bytesPerHostOutputSample = bytesPerSample;
+ }
+ else
+ {
+ result = bytesPerSample;
+ goto error;
+ }
+
+ bytesPerSample = Pa_GetSampleSize( userOutputSampleFormat );
+ if( bytesPerSample > 0 )
+ {
+ bp->bytesPerUserOutputSample = bytesPerSample;
+ }
+ else
+ {
+ result = bytesPerSample;
+ goto error;
+ }
+
+ bp->outputConverter =
+ PaUtil_SelectConverter( userOutputSampleFormat, hostOutputSampleFormat, streamFlags );
+
+ bp->outputZeroer = PaUtil_SelectZeroer( hostOutputSampleFormat );
+
+ bp->userOutputIsInterleaved = (userOutputSampleFormat & paNonInterleaved)?0:1;
+
+ tempOutputBufferSize =
+ bp->framesPerTempBuffer * bp->bytesPerUserOutputSample * outputChannelCount;
+
+ bp->tempOutputBuffer = PaUtil_AllocateMemory( tempOutputBufferSize );
+ if( bp->tempOutputBuffer == 0 )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ if( bp->framesInTempOutputBuffer > 0 )
+ memset( bp->tempOutputBuffer, 0, tempOutputBufferSize );
+
+ if( userOutputSampleFormat & paNonInterleaved )
+ {
+ bp->tempOutputBufferPtrs =
+ (void **)PaUtil_AllocateMemory( sizeof(void*)*outputChannelCount );
+ if( bp->tempOutputBufferPtrs == 0 )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+ }
+
+ bp->hostOutputChannels[0] = (PaUtilChannelDescriptor*)
+ PaUtil_AllocateMemory( sizeof(PaUtilChannelDescriptor)*outputChannelCount * 2 );
+ if( bp->hostOutputChannels[0] == 0 )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ bp->hostOutputChannels[1] = &bp->hostOutputChannels[0][outputChannelCount];
+ }
+
+ PaUtil_InitializeTriangularDitherState( &bp->ditherGenerator );
+
+ bp->samplePeriod = 1. / sampleRate;
+
+ bp->streamCallback = streamCallback;
+ bp->userData = userData;
+
+ return result;
+
+error:
+ if( bp->tempInputBuffer )
+ PaUtil_FreeMemory( bp->tempInputBuffer );
+
+ if( bp->tempInputBufferPtrs )
+ PaUtil_FreeMemory( bp->tempInputBufferPtrs );
+
+ if( bp->hostInputChannels[0] )
+ PaUtil_FreeMemory( bp->hostInputChannels[0] );
+
+ if( bp->tempOutputBuffer )
+ PaUtil_FreeMemory( bp->tempOutputBuffer );
+
+ if( bp->tempOutputBufferPtrs )
+ PaUtil_FreeMemory( bp->tempOutputBufferPtrs );
+
+ if( bp->hostOutputChannels[0] )
+ PaUtil_FreeMemory( bp->hostOutputChannels[0] );
+
+ return result;
+}
+
+
+void PaUtil_TerminateBufferProcessor( PaUtilBufferProcessor* bp )
+{
+ if( bp->tempInputBuffer )
+ PaUtil_FreeMemory( bp->tempInputBuffer );
+
+ if( bp->tempInputBufferPtrs )
+ PaUtil_FreeMemory( bp->tempInputBufferPtrs );
+
+ if( bp->hostInputChannels[0] )
+ PaUtil_FreeMemory( bp->hostInputChannels[0] );
+
+ if( bp->tempOutputBuffer )
+ PaUtil_FreeMemory( bp->tempOutputBuffer );
+
+ if( bp->tempOutputBufferPtrs )
+ PaUtil_FreeMemory( bp->tempOutputBufferPtrs );
+
+ if( bp->hostOutputChannels[0] )
+ PaUtil_FreeMemory( bp->hostOutputChannels[0] );
+}
+
+
+void PaUtil_ResetBufferProcessor( PaUtilBufferProcessor* bp )
+{
+ unsigned long tempInputBufferSize, tempOutputBufferSize;
+
+ bp->framesInTempInputBuffer = bp->initialFramesInTempInputBuffer;
+ bp->framesInTempOutputBuffer = bp->initialFramesInTempOutputBuffer;
+
+ if( bp->framesInTempInputBuffer > 0 )
+ {
+ tempInputBufferSize =
+ bp->framesPerTempBuffer * bp->bytesPerUserInputSample * bp->inputChannelCount;
+ memset( bp->tempInputBuffer, 0, tempInputBufferSize );
+ }
+
+ if( bp->framesInTempOutputBuffer > 0 )
+ {
+ tempOutputBufferSize =
+ bp->framesPerTempBuffer * bp->bytesPerUserOutputSample * bp->outputChannelCount;
+ memset( bp->tempOutputBuffer, 0, tempOutputBufferSize );
+ }
+}
+
+
+unsigned long PaUtil_GetBufferProcessorInputLatency( PaUtilBufferProcessor* bp )
+{
+ return bp->initialFramesInTempInputBuffer;
+}
+
+
+unsigned long PaUtil_GetBufferProcessorOutputLatency( PaUtilBufferProcessor* bp )
+{
+ return bp->initialFramesInTempOutputBuffer;
+}
+
+
+void PaUtil_SetInputFrameCount( PaUtilBufferProcessor* bp,
+ unsigned long frameCount )
+{
+ if( frameCount == 0 )
+ bp->hostInputFrameCount[0] = bp->framesPerHostBuffer;
+ else
+ bp->hostInputFrameCount[0] = frameCount;
+}
+
+
+void PaUtil_SetNoInput( PaUtilBufferProcessor* bp )
+{
+ assert( bp->inputChannelCount > 0 );
+
+ bp->hostInputChannels[0][0].data = 0;
+}
+
+
+void PaUtil_SetInputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data, unsigned int stride )
+{
+ assert( channel < bp->inputChannelCount );
+
+ bp->hostInputChannels[0][channel].data = data;
+ bp->hostInputChannels[0][channel].stride = stride;
+}
+
+
+void PaUtil_SetInterleavedInputChannels( PaUtilBufferProcessor* bp,
+ unsigned int firstChannel, void *data, unsigned int channelCount )
+{
+ unsigned int i;
+ unsigned int channel = firstChannel;
+ unsigned char *p = (unsigned char*)data;
+
+ if( channelCount == 0 )
+ channelCount = bp->inputChannelCount;
+
+ assert( firstChannel < bp->inputChannelCount );
+ assert( firstChannel + channelCount <= bp->inputChannelCount );
+
+ for( i=0; i< channelCount; ++i )
+ {
+ bp->hostInputChannels[0][channel+i].data = p;
+ p += bp->bytesPerHostInputSample;
+ bp->hostInputChannels[0][channel+i].stride = channelCount;
+ }
+}
+
+
+void PaUtil_SetNonInterleavedInputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data )
+{
+ assert( channel < bp->inputChannelCount );
+
+ bp->hostInputChannels[0][channel].data = data;
+ bp->hostInputChannels[0][channel].stride = 1;
+}
+
+
+void PaUtil_Set2ndInputFrameCount( PaUtilBufferProcessor* bp,
+ unsigned long frameCount )
+{
+ bp->hostInputFrameCount[1] = frameCount;
+}
+
+
+void PaUtil_Set2ndInputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data, unsigned int stride )
+{
+ assert( channel < bp->inputChannelCount );
+
+ bp->hostInputChannels[1][channel].data = data;
+ bp->hostInputChannels[1][channel].stride = stride;
+}
+
+
+void PaUtil_Set2ndInterleavedInputChannels( PaUtilBufferProcessor* bp,
+ unsigned int firstChannel, void *data, unsigned int channelCount )
+{
+ unsigned int i;
+ unsigned int channel = firstChannel;
+ unsigned char *p = (unsigned char*)data;
+
+ if( channelCount == 0 )
+ channelCount = bp->inputChannelCount;
+
+ assert( firstChannel < bp->inputChannelCount );
+ assert( firstChannel + channelCount <= bp->inputChannelCount );
+
+ for( i=0; i< channelCount; ++i )
+ {
+ bp->hostInputChannels[1][channel+i].data = p;
+ p += bp->bytesPerHostInputSample;
+ bp->hostInputChannels[1][channel+i].stride = channelCount;
+ }
+}
+
+
+void PaUtil_Set2ndNonInterleavedInputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data )
+{
+ assert( channel < bp->inputChannelCount );
+
+ bp->hostInputChannels[1][channel].data = data;
+ bp->hostInputChannels[1][channel].stride = 1;
+}
+
+
+void PaUtil_SetOutputFrameCount( PaUtilBufferProcessor* bp,
+ unsigned long frameCount )
+{
+ if( frameCount == 0 )
+ bp->hostOutputFrameCount[0] = bp->framesPerHostBuffer;
+ else
+ bp->hostOutputFrameCount[0] = frameCount;
+}
+
+
+void PaUtil_SetNoOutput( PaUtilBufferProcessor* bp )
+{
+ assert( bp->outputChannelCount > 0 );
+
+ bp->hostOutputChannels[0][0].data = 0;
+}
+
+
+void PaUtil_SetOutputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data, unsigned int stride )
+{
+ assert( channel < bp->outputChannelCount );
+ assert( data != NULL );
+
+ bp->hostOutputChannels[0][channel].data = data;
+ bp->hostOutputChannels[0][channel].stride = stride;
+}
+
+
+void PaUtil_SetInterleavedOutputChannels( PaUtilBufferProcessor* bp,
+ unsigned int firstChannel, void *data, unsigned int channelCount )
+{
+ unsigned int i;
+ unsigned int channel = firstChannel;
+ unsigned char *p = (unsigned char*)data;
+
+ if( channelCount == 0 )
+ channelCount = bp->outputChannelCount;
+
+ assert( firstChannel < bp->outputChannelCount );
+ assert( firstChannel + channelCount <= bp->outputChannelCount );
+
+ for( i=0; i< channelCount; ++i )
+ {
+ PaUtil_SetOutputChannel( bp, channel + i, p, channelCount );
+ p += bp->bytesPerHostOutputSample;
+ }
+}
+
+
+void PaUtil_SetNonInterleavedOutputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data )
+{
+ assert( channel < bp->outputChannelCount );
+
+ PaUtil_SetOutputChannel( bp, channel, data, 1 );
+}
+
+
+void PaUtil_Set2ndOutputFrameCount( PaUtilBufferProcessor* bp,
+ unsigned long frameCount )
+{
+ bp->hostOutputFrameCount[1] = frameCount;
+}
+
+
+void PaUtil_Set2ndOutputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data, unsigned int stride )
+{
+ assert( channel < bp->outputChannelCount );
+ assert( data != NULL );
+
+ bp->hostOutputChannels[1][channel].data = data;
+ bp->hostOutputChannels[1][channel].stride = stride;
+}
+
+
+void PaUtil_Set2ndInterleavedOutputChannels( PaUtilBufferProcessor* bp,
+ unsigned int firstChannel, void *data, unsigned int channelCount )
+{
+ unsigned int i;
+ unsigned int channel = firstChannel;
+ unsigned char *p = (unsigned char*)data;
+
+ if( channelCount == 0 )
+ channelCount = bp->outputChannelCount;
+
+ assert( firstChannel < bp->outputChannelCount );
+ assert( firstChannel + channelCount <= bp->outputChannelCount );
+
+ for( i=0; i< channelCount; ++i )
+ {
+ PaUtil_Set2ndOutputChannel( bp, channel + i, p, channelCount );
+ p += bp->bytesPerHostOutputSample;
+ }
+}
+
+
+void PaUtil_Set2ndNonInterleavedOutputChannel( PaUtilBufferProcessor* bp,
+ unsigned int channel, void *data )
+{
+ assert( channel < bp->outputChannelCount );
+
+ PaUtil_Set2ndOutputChannel( bp, channel, data, 1 );
+}
+
+
+void PaUtil_BeginBufferProcessing( PaUtilBufferProcessor* bp,
+ PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags callbackStatusFlags )
+{
+ bp->timeInfo = timeInfo;
+
+ /* the first streamCallback will be called to process samples which are
+ currently in the input buffer before the ones starting at the timeInfo time */
+
+ bp->timeInfo->inputBufferAdcTime -= bp->framesInTempInputBuffer * bp->samplePeriod;
+
+ bp->timeInfo->currentTime = 0; /** FIXME: @todo time info currentTime not implemented */
+
+ /* the first streamCallback will be called to generate samples which will be
+ outputted after the frames currently in the output buffer have been
+ outputted. */
+ bp->timeInfo->outputBufferDacTime += bp->framesInTempOutputBuffer * bp->samplePeriod;
+
+ bp->callbackStatusFlags = callbackStatusFlags;
+
+ bp->hostInputFrameCount[1] = 0;
+ bp->hostOutputFrameCount[1] = 0;
+}
+
+
+/*
+ NonAdaptingProcess() is a simple buffer copying adaptor that can handle
+ both full and half duplex copies. It processes framesToProcess frames,
+ broken into blocks bp->framesPerTempBuffer long.
+ This routine can be used when the streamCallback doesn't care what length
+ the buffers are, or when framesToProcess is an integer multiple of
+ bp->framesPerTempBuffer, in which case streamCallback will always be called
+ with bp->framesPerTempBuffer samples.
+*/
+static unsigned long NonAdaptingProcess( PaUtilBufferProcessor *bp,
+ int *streamCallbackResult,
+ PaUtilChannelDescriptor *hostInputChannels,
+ PaUtilChannelDescriptor *hostOutputChannels,
+ unsigned long framesToProcess )
+{
+ void *userInput, *userOutput;
+ unsigned char *srcBytePtr, *destBytePtr;
+ unsigned int srcSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int srcChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int destSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int destChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int i;
+ unsigned long frameCount;
+ unsigned long framesToGo = framesToProcess;
+ unsigned long framesProcessed = 0;
+
+
+ if( *streamCallbackResult == paContinue )
+ {
+ do
+ {
+ frameCount = PA_MIN_( bp->framesPerTempBuffer, framesToGo );
+
+ /* configure user input buffer and convert input data (host -> user) */
+ if( bp->inputChannelCount == 0 )
+ {
+ /* no input */
+ userInput = 0;
+ }
+ else /* there are input channels */
+ {
+ /*
+ could use more elaborate logic here and sometimes process
+ buffers in-place.
+ */
+
+ destBytePtr = (unsigned char *)bp->tempInputBuffer;
+
+ if( bp->userInputIsInterleaved )
+ {
+ destSampleStrideSamples = bp->inputChannelCount;
+ destChannelStrideBytes = bp->bytesPerUserInputSample;
+ userInput = bp->tempInputBuffer;
+ }
+ else /* user input is not interleaved */
+ {
+ destSampleStrideSamples = 1;
+ destChannelStrideBytes = frameCount * bp->bytesPerUserInputSample;
+
+ /* setup non-interleaved ptrs */
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ bp->tempInputBufferPtrs[i] = ((unsigned char*)bp->tempInputBuffer) +
+ i * bp->bytesPerUserInputSample * frameCount;
+ }
+
+ userInput = bp->tempInputBufferPtrs;
+ }
+
+ if( !bp->hostInputChannels[0][0].data )
+ {
+ /* no input was supplied (see PaUtil_SetNoInput), so
+ zero the input buffer */
+
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ bp->inputZeroer( destBytePtr, destSampleStrideSamples, frameCount );
+ destBytePtr += destChannelStrideBytes; /* skip to next destination channel */
+ }
+ }
+ else
+ {
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ bp->inputConverter( destBytePtr, destSampleStrideSamples,
+ hostInputChannels[i].data,
+ hostInputChannels[i].stride,
+ frameCount, &bp->ditherGenerator );
+
+ destBytePtr += destChannelStrideBytes; /* skip to next destination channel */
+
+ /* advance src ptr for next iteration */
+ hostInputChannels[i].data = ((unsigned char*)hostInputChannels[i].data) +
+ frameCount * hostInputChannels[i].stride * bp->bytesPerHostInputSample;
+ }
+ }
+ }
+
+ /* configure user output buffer */
+ if( bp->outputChannelCount == 0 )
+ {
+ /* no output */
+ userOutput = 0;
+ }
+ else /* there are output channels */
+ {
+ if( bp->userOutputIsInterleaved )
+ {
+ userOutput = bp->tempOutputBuffer;
+ }
+ else /* user output is not interleaved */
+ {
+ for( i = 0; i < bp->outputChannelCount; ++i )
+ {
+ bp->tempOutputBufferPtrs[i] = ((unsigned char*)bp->tempOutputBuffer) +
+ i * bp->bytesPerUserOutputSample * frameCount;
+ }
+
+ userOutput = bp->tempOutputBufferPtrs;
+ }
+ }
+
+ *streamCallbackResult = bp->streamCallback( userInput, userOutput,
+ frameCount, bp->timeInfo, bp->callbackStatusFlags, bp->userData );
+
+ if( *streamCallbackResult == paAbort )
+ {
+ /* callback returned paAbort, don't advance framesProcessed
+ and framesToGo, they will be handled below */
+ }
+ else
+ {
+ bp->timeInfo->inputBufferAdcTime += frameCount * bp->samplePeriod;
+ bp->timeInfo->outputBufferDacTime += frameCount * bp->samplePeriod;
+
+ /* convert output data (user -> host) */
+
+ if( bp->outputChannelCount != 0 && bp->hostOutputChannels[0][0].data )
+ {
+ /*
+ could use more elaborate logic here and sometimes process
+ buffers in-place.
+ */
+
+ srcBytePtr = (unsigned char *)bp->tempOutputBuffer;
+
+ if( bp->userOutputIsInterleaved )
+ {
+ srcSampleStrideSamples = bp->outputChannelCount;
+ srcChannelStrideBytes = bp->bytesPerUserOutputSample;
+ }
+ else /* user output is not interleaved */
+ {
+ srcSampleStrideSamples = 1;
+ srcChannelStrideBytes = frameCount * bp->bytesPerUserOutputSample;
+ }
+
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ bp->outputConverter( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ srcBytePtr, srcSampleStrideSamples,
+ frameCount, &bp->ditherGenerator );
+
+ srcBytePtr += srcChannelStrideBytes; /* skip to next source channel */
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ frameCount * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+ }
+
+ framesProcessed += frameCount;
+
+ framesToGo -= frameCount;
+ }
+ }
+ while( framesToGo > 0 && *streamCallbackResult == paContinue );
+ }
+
+ if( framesToGo > 0 )
+ {
+ /* zero any remaining frames output. There will only be remaining frames
+ if the callback has returned paComplete or paAbort */
+
+ frameCount = framesToGo;
+
+ if( bp->outputChannelCount != 0 && bp->hostOutputChannels[0][0].data )
+ {
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ bp->outputZeroer( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ frameCount );
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ frameCount * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+ }
+
+ framesProcessed += frameCount;
+ }
+
+ return framesProcessed;
+}
+
+
+/*
+ AdaptingInputOnlyProcess() is a half duplex input buffer processor. It
+ converts data from the input buffers into the temporary input buffer,
+ when the temporary input buffer is full, it calls the streamCallback.
+*/
+static unsigned long AdaptingInputOnlyProcess( PaUtilBufferProcessor *bp,
+ int *streamCallbackResult,
+ PaUtilChannelDescriptor *hostInputChannels,
+ unsigned long framesToProcess )
+{
+ void *userInput, *userOutput;
+ unsigned char *destBytePtr;
+ unsigned int destSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int destChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int i;
+ unsigned long frameCount;
+ unsigned long framesToGo = framesToProcess;
+ unsigned long framesProcessed = 0;
+
+ userOutput = 0;
+
+ do
+ {
+ frameCount = ( bp->framesInTempInputBuffer + framesToGo > bp->framesPerUserBuffer )
+ ? ( bp->framesPerUserBuffer - bp->framesInTempInputBuffer )
+ : framesToGo;
+
+ /* convert frameCount samples into temp buffer */
+
+ if( bp->userInputIsInterleaved )
+ {
+ destBytePtr = ((unsigned char*)bp->tempInputBuffer) +
+ bp->bytesPerUserInputSample * bp->inputChannelCount *
+ bp->framesInTempInputBuffer;
+
+ destSampleStrideSamples = bp->inputChannelCount;
+ destChannelStrideBytes = bp->bytesPerUserInputSample;
+
+ userInput = bp->tempInputBuffer;
+ }
+ else /* user input is not interleaved */
+ {
+ destBytePtr = ((unsigned char*)bp->tempInputBuffer) +
+ bp->bytesPerUserInputSample * bp->framesInTempInputBuffer;
+
+ destSampleStrideSamples = 1;
+ destChannelStrideBytes = bp->framesPerUserBuffer * bp->bytesPerUserInputSample;
+
+ /* setup non-interleaved ptrs */
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ bp->tempInputBufferPtrs[i] = ((unsigned char*)bp->tempInputBuffer) +
+ i * bp->bytesPerUserInputSample * bp->framesPerUserBuffer;
+ }
+
+ userInput = bp->tempInputBufferPtrs;
+ }
+
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ bp->inputConverter( destBytePtr, destSampleStrideSamples,
+ hostInputChannels[i].data,
+ hostInputChannels[i].stride,
+ frameCount, &bp->ditherGenerator );
+
+ destBytePtr += destChannelStrideBytes; /* skip to next destination channel */
+
+ /* advance src ptr for next iteration */
+ hostInputChannels[i].data = ((unsigned char*)hostInputChannels[i].data) +
+ frameCount * hostInputChannels[i].stride * bp->bytesPerHostInputSample;
+ }
+
+ bp->framesInTempInputBuffer += frameCount;
+
+ if( bp->framesInTempInputBuffer == bp->framesPerUserBuffer )
+ {
+ /**
+ @todo (non-critical optimisation)
+ The conditional below implements the continue/complete/abort mechanism
+ simply by continuing on iterating through the input buffer, but not
+ passing the data to the callback. With care, the outer loop could be
+ terminated earlier, thus some unneeded conversion cycles would be
+ saved.
+ */
+ if( *streamCallbackResult == paContinue )
+ {
+ bp->timeInfo->outputBufferDacTime = 0;
+
+ *streamCallbackResult = bp->streamCallback( userInput, userOutput,
+ bp->framesPerUserBuffer, bp->timeInfo,
+ bp->callbackStatusFlags, bp->userData );
+
+ bp->timeInfo->inputBufferAdcTime += frameCount * bp->samplePeriod;
+ }
+
+ bp->framesInTempInputBuffer = 0;
+ }
+
+ framesProcessed += frameCount;
+
+ framesToGo -= frameCount;
+ }while( framesToGo > 0 );
+
+ return framesProcessed;
+}
+
+
+/*
+ AdaptingOutputOnlyProcess() is a half duplex output buffer processor.
+ It converts data from the temporary output buffer, to the output buffers,
+ when the temporary output buffer is empty, it calls the streamCallback.
+*/
+static unsigned long AdaptingOutputOnlyProcess( PaUtilBufferProcessor *bp,
+ int *streamCallbackResult,
+ PaUtilChannelDescriptor *hostOutputChannels,
+ unsigned long framesToProcess )
+{
+ void *userInput, *userOutput;
+ unsigned char *srcBytePtr;
+ unsigned int srcSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int srcChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int i;
+ unsigned long frameCount;
+ unsigned long framesToGo = framesToProcess;
+ unsigned long framesProcessed = 0;
+
+ do
+ {
+ if( bp->framesInTempOutputBuffer == 0 && *streamCallbackResult == paContinue )
+ {
+ userInput = 0;
+
+ /* setup userOutput */
+ if( bp->userOutputIsInterleaved )
+ {
+ userOutput = bp->tempOutputBuffer;
+ }
+ else /* user output is not interleaved */
+ {
+ for( i = 0; i < bp->outputChannelCount; ++i )
+ {
+ bp->tempOutputBufferPtrs[i] = ((unsigned char*)bp->tempOutputBuffer) +
+ i * bp->framesPerUserBuffer * bp->bytesPerUserOutputSample;
+ }
+
+ userOutput = bp->tempOutputBufferPtrs;
+ }
+
+ bp->timeInfo->inputBufferAdcTime = 0;
+
+ *streamCallbackResult = bp->streamCallback( userInput, userOutput,
+ bp->framesPerUserBuffer, bp->timeInfo,
+ bp->callbackStatusFlags, bp->userData );
+
+ if( *streamCallbackResult == paAbort )
+ {
+ /* if the callback returned paAbort, we disregard its output */
+ }
+ else
+ {
+ bp->timeInfo->outputBufferDacTime += bp->framesPerUserBuffer * bp->samplePeriod;
+
+ bp->framesInTempOutputBuffer = bp->framesPerUserBuffer;
+ }
+ }
+
+ if( bp->framesInTempOutputBuffer > 0 )
+ {
+ /* convert frameCount frames from user buffer to host buffer */
+
+ frameCount = PA_MIN_( bp->framesInTempOutputBuffer, framesToGo );
+
+ if( bp->userOutputIsInterleaved )
+ {
+ srcBytePtr = ((unsigned char*)bp->tempOutputBuffer) +
+ bp->bytesPerUserOutputSample * bp->outputChannelCount *
+ (bp->framesPerUserBuffer - bp->framesInTempOutputBuffer);
+
+ srcSampleStrideSamples = bp->outputChannelCount;
+ srcChannelStrideBytes = bp->bytesPerUserOutputSample;
+ }
+ else /* user output is not interleaved */
+ {
+ srcBytePtr = ((unsigned char*)bp->tempOutputBuffer) +
+ bp->bytesPerUserOutputSample *
+ (bp->framesPerUserBuffer - bp->framesInTempOutputBuffer);
+
+ srcSampleStrideSamples = 1;
+ srcChannelStrideBytes = bp->framesPerUserBuffer * bp->bytesPerUserOutputSample;
+ }
+
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ bp->outputConverter( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ srcBytePtr, srcSampleStrideSamples,
+ frameCount, &bp->ditherGenerator );
+
+ srcBytePtr += srcChannelStrideBytes; /* skip to next source channel */
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ frameCount * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+
+ bp->framesInTempOutputBuffer -= frameCount;
+ }
+ else
+ {
+ /* no more user data is available because the callback has returned
+ paComplete or paAbort. Fill the remainder of the host buffer
+ with zeros.
+ */
+
+ frameCount = framesToGo;
+
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ bp->outputZeroer( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ frameCount );
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ frameCount * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+ }
+
+ framesProcessed += frameCount;
+
+ framesToGo -= frameCount;
+
+ }while( framesToGo > 0 );
+
+ return framesProcessed;
+}
+
+/* CopyTempOutputBuffersToHostOutputBuffers is called from AdaptingProcess to copy frames from
+ tempOutputBuffer to hostOutputChannels. This includes data conversion
+ and interleaving.
+*/
+static void CopyTempOutputBuffersToHostOutputBuffers( PaUtilBufferProcessor *bp)
+{
+ unsigned long maxFramesToCopy;
+ PaUtilChannelDescriptor *hostOutputChannels;
+ unsigned int frameCount;
+ unsigned char *srcBytePtr;
+ unsigned int srcSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int srcChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int i;
+
+ /* copy frames from user to host output buffers */
+ while( bp->framesInTempOutputBuffer > 0 &&
+ ((bp->hostOutputFrameCount[0] + bp->hostOutputFrameCount[1]) > 0) )
+ {
+ maxFramesToCopy = bp->framesInTempOutputBuffer;
+
+ /* select the output buffer set (1st or 2nd) */
+ if( bp->hostOutputFrameCount[0] > 0 )
+ {
+ hostOutputChannels = bp->hostOutputChannels[0];
+ frameCount = PA_MIN_( bp->hostOutputFrameCount[0], maxFramesToCopy );
+ }
+ else
+ {
+ hostOutputChannels = bp->hostOutputChannels[1];
+ frameCount = PA_MIN_( bp->hostOutputFrameCount[1], maxFramesToCopy );
+ }
+
+ if( bp->userOutputIsInterleaved )
+ {
+ srcBytePtr = ((unsigned char*)bp->tempOutputBuffer) +
+ bp->bytesPerUserOutputSample * bp->outputChannelCount *
+ (bp->framesPerUserBuffer - bp->framesInTempOutputBuffer);
+
+ srcSampleStrideSamples = bp->outputChannelCount;
+ srcChannelStrideBytes = bp->bytesPerUserOutputSample;
+ }
+ else /* user output is not interleaved */
+ {
+ srcBytePtr = ((unsigned char*)bp->tempOutputBuffer) +
+ bp->bytesPerUserOutputSample *
+ (bp->framesPerUserBuffer - bp->framesInTempOutputBuffer);
+
+ srcSampleStrideSamples = 1;
+ srcChannelStrideBytes = bp->framesPerUserBuffer * bp->bytesPerUserOutputSample;
+ }
+
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ assert( hostOutputChannels[i].data != NULL );
+ bp->outputConverter( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ srcBytePtr, srcSampleStrideSamples,
+ frameCount, &bp->ditherGenerator );
+
+ srcBytePtr += srcChannelStrideBytes; /* skip to next source channel */
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ frameCount * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+
+ if( bp->hostOutputFrameCount[0] > 0 )
+ bp->hostOutputFrameCount[0] -= frameCount;
+ else
+ bp->hostOutputFrameCount[1] -= frameCount;
+
+ bp->framesInTempOutputBuffer -= frameCount;
+ }
+}
+
+/*
+ AdaptingProcess is a full duplex adapting buffer processor. It converts
+ data from the temporary output buffer into the host output buffers, then
+ from the host input buffers into the temporary input buffers. Calling the
+ streamCallback when necessary.
+ When processPartialUserBuffers is 0, all available input data will be
+ consumed and all available output space will be filled. When
+ processPartialUserBuffers is non-zero, as many full user buffers
+ as possible will be processed, but partial buffers will not be consumed.
+*/
+static unsigned long AdaptingProcess( PaUtilBufferProcessor *bp,
+ int *streamCallbackResult, int processPartialUserBuffers )
+{
+ void *userInput, *userOutput;
+ unsigned long framesProcessed = 0;
+ unsigned long framesAvailable;
+ unsigned long endProcessingMinFrameCount;
+ unsigned long maxFramesToCopy;
+ PaUtilChannelDescriptor *hostInputChannels, *hostOutputChannels;
+ unsigned int frameCount;
+ unsigned char *destBytePtr;
+ unsigned int destSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int destChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int i, j;
+
+
+ framesAvailable = bp->hostInputFrameCount[0] + bp->hostInputFrameCount[1];/* this is assumed to be the same as the output buffer's frame count */
+
+ if( processPartialUserBuffers )
+ endProcessingMinFrameCount = 0;
+ else
+ endProcessingMinFrameCount = (bp->framesPerUserBuffer - 1);
+
+ /* Fill host output with remaining frames in user output (tempOutputBuffer) */
+ CopyTempOutputBuffersToHostOutputBuffers( bp );
+
+ while( framesAvailable > endProcessingMinFrameCount )
+ {
+
+ if( bp->framesInTempOutputBuffer == 0 && *streamCallbackResult != paContinue )
+ {
+ /* the callback will not be called any more, so zero what remains
+ of the host output buffers */
+
+ for( i=0; i<2; ++i )
+ {
+ frameCount = bp->hostOutputFrameCount[i];
+ if( frameCount > 0 )
+ {
+ hostOutputChannels = bp->hostOutputChannels[i];
+
+ for( j=0; j<bp->outputChannelCount; ++j )
+ {
+ bp->outputZeroer( hostOutputChannels[j].data,
+ hostOutputChannels[j].stride,
+ frameCount );
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[j].data = ((unsigned char*)hostOutputChannels[j].data) +
+ frameCount * hostOutputChannels[j].stride * bp->bytesPerHostOutputSample;
+ }
+ bp->hostOutputFrameCount[i] = 0;
+ }
+ }
+ }
+
+
+ /* copy frames from host to user input buffers */
+ while( bp->framesInTempInputBuffer < bp->framesPerUserBuffer &&
+ ((bp->hostInputFrameCount[0] + bp->hostInputFrameCount[1]) > 0) )
+ {
+ maxFramesToCopy = bp->framesPerUserBuffer - bp->framesInTempInputBuffer;
+
+ /* select the input buffer set (1st or 2nd) */
+ if( bp->hostInputFrameCount[0] > 0 )
+ {
+ hostInputChannels = bp->hostInputChannels[0];
+ frameCount = PA_MIN_( bp->hostInputFrameCount[0], maxFramesToCopy );
+ }
+ else
+ {
+ hostInputChannels = bp->hostInputChannels[1];
+ frameCount = PA_MIN_( bp->hostInputFrameCount[1], maxFramesToCopy );
+ }
+
+ /* configure conversion destination pointers */
+ if( bp->userInputIsInterleaved )
+ {
+ destBytePtr = ((unsigned char*)bp->tempInputBuffer) +
+ bp->bytesPerUserInputSample * bp->inputChannelCount *
+ bp->framesInTempInputBuffer;
+
+ destSampleStrideSamples = bp->inputChannelCount;
+ destChannelStrideBytes = bp->bytesPerUserInputSample;
+ }
+ else /* user input is not interleaved */
+ {
+ destBytePtr = ((unsigned char*)bp->tempInputBuffer) +
+ bp->bytesPerUserInputSample * bp->framesInTempInputBuffer;
+
+ destSampleStrideSamples = 1;
+ destChannelStrideBytes = bp->framesPerUserBuffer * bp->bytesPerUserInputSample;
+ }
+
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ bp->inputConverter( destBytePtr, destSampleStrideSamples,
+ hostInputChannels[i].data,
+ hostInputChannels[i].stride,
+ frameCount, &bp->ditherGenerator );
+
+ destBytePtr += destChannelStrideBytes; /* skip to next destination channel */
+
+ /* advance src ptr for next iteration */
+ hostInputChannels[i].data = ((unsigned char*)hostInputChannels[i].data) +
+ frameCount * hostInputChannels[i].stride * bp->bytesPerHostInputSample;
+ }
+
+ if( bp->hostInputFrameCount[0] > 0 )
+ bp->hostInputFrameCount[0] -= frameCount;
+ else
+ bp->hostInputFrameCount[1] -= frameCount;
+
+ bp->framesInTempInputBuffer += frameCount;
+
+ /* update framesAvailable and framesProcessed based on input consumed
+ unless something is very wrong this will also correspond to the
+ amount of output generated */
+ framesAvailable -= frameCount;
+ framesProcessed += frameCount;
+ }
+
+ /* call streamCallback */
+ if( bp->framesInTempInputBuffer == bp->framesPerUserBuffer &&
+ bp->framesInTempOutputBuffer == 0 )
+ {
+ if( *streamCallbackResult == paContinue )
+ {
+ /* setup userInput */
+ if( bp->userInputIsInterleaved )
+ {
+ userInput = bp->tempInputBuffer;
+ }
+ else /* user input is not interleaved */
+ {
+ for( i = 0; i < bp->inputChannelCount; ++i )
+ {
+ bp->tempInputBufferPtrs[i] = ((unsigned char*)bp->tempInputBuffer) +
+ i * bp->framesPerUserBuffer * bp->bytesPerUserInputSample;
+ }
+
+ userInput = bp->tempInputBufferPtrs;
+ }
+
+ /* setup userOutput */
+ if( bp->userOutputIsInterleaved )
+ {
+ userOutput = bp->tempOutputBuffer;
+ }
+ else /* user output is not interleaved */
+ {
+ for( i = 0; i < bp->outputChannelCount; ++i )
+ {
+ bp->tempOutputBufferPtrs[i] = ((unsigned char*)bp->tempOutputBuffer) +
+ i * bp->framesPerUserBuffer * bp->bytesPerUserOutputSample;
+ }
+
+ userOutput = bp->tempOutputBufferPtrs;
+ }
+
+ /* call streamCallback */
+
+ *streamCallbackResult = bp->streamCallback( userInput, userOutput,
+ bp->framesPerUserBuffer, bp->timeInfo,
+ bp->callbackStatusFlags, bp->userData );
+
+ bp->timeInfo->inputBufferAdcTime += bp->framesPerUserBuffer * bp->samplePeriod;
+ bp->timeInfo->outputBufferDacTime += bp->framesPerUserBuffer * bp->samplePeriod;
+
+ bp->framesInTempInputBuffer = 0;
+
+ if( *streamCallbackResult == paAbort )
+ bp->framesInTempOutputBuffer = 0;
+ else
+ bp->framesInTempOutputBuffer = bp->framesPerUserBuffer;
+ }
+ else
+ {
+ /* paComplete or paAbort has already been called. */
+
+ bp->framesInTempInputBuffer = 0;
+ }
+ }
+
+ /* copy frames from user (tempOutputBuffer) to host output buffers (hostOutputChannels)
+ Means to process the user output provided by the callback. Has to be called after
+ each callback. */
+ CopyTempOutputBuffersToHostOutputBuffers( bp );
+
+ }
+
+ return framesProcessed;
+}
+
+
+unsigned long PaUtil_EndBufferProcessing( PaUtilBufferProcessor* bp, int *streamCallbackResult )
+{
+ unsigned long framesToProcess, framesToGo;
+ unsigned long framesProcessed = 0;
+
+ if( bp->inputChannelCount != 0 && bp->outputChannelCount != 0
+ && bp->hostInputChannels[0][0].data /* input was supplied (see PaUtil_SetNoInput) */
+ && bp->hostOutputChannels[0][0].data /* output was supplied (see PaUtil_SetNoOutput) */ )
+ {
+ assert( (bp->hostInputFrameCount[0] + bp->hostInputFrameCount[1]) ==
+ (bp->hostOutputFrameCount[0] + bp->hostOutputFrameCount[1]) );
+ }
+
+ assert( *streamCallbackResult == paContinue
+ || *streamCallbackResult == paComplete
+ || *streamCallbackResult == paAbort ); /* don't forget to pass in a valid callback result value */
+
+ if( bp->useNonAdaptingProcess )
+ {
+ if( bp->inputChannelCount != 0 && bp->outputChannelCount != 0 )
+ {
+ /* full duplex non-adapting process, splice buffers if they are
+ different lengths */
+
+ framesToGo = bp->hostOutputFrameCount[0] + bp->hostOutputFrameCount[1]; /* relies on assert above for input/output equivalence */
+
+ do{
+ unsigned long noInputInputFrameCount;
+ unsigned long *hostInputFrameCount;
+ PaUtilChannelDescriptor *hostInputChannels;
+ unsigned long noOutputOutputFrameCount;
+ unsigned long *hostOutputFrameCount;
+ PaUtilChannelDescriptor *hostOutputChannels;
+ unsigned long framesProcessedThisIteration;
+
+ if( !bp->hostInputChannels[0][0].data )
+ {
+ /* no input was supplied (see PaUtil_SetNoInput)
+ NonAdaptingProcess knows how to deal with this
+ */
+ noInputInputFrameCount = framesToGo;
+ hostInputFrameCount = &noInputInputFrameCount;
+ hostInputChannels = 0;
+ }
+ else if( bp->hostInputFrameCount[0] != 0 )
+ {
+ hostInputFrameCount = &bp->hostInputFrameCount[0];
+ hostInputChannels = bp->hostInputChannels[0];
+ }
+ else
+ {
+ hostInputFrameCount = &bp->hostInputFrameCount[1];
+ hostInputChannels = bp->hostInputChannels[1];
+ }
+
+ if( !bp->hostOutputChannels[0][0].data )
+ {
+ /* no output was supplied (see PaUtil_SetNoOutput)
+ NonAdaptingProcess knows how to deal with this
+ */
+ noOutputOutputFrameCount = framesToGo;
+ hostOutputFrameCount = &noOutputOutputFrameCount;
+ hostOutputChannels = 0;
+ }
+ if( bp->hostOutputFrameCount[0] != 0 )
+ {
+ hostOutputFrameCount = &bp->hostOutputFrameCount[0];
+ hostOutputChannels = bp->hostOutputChannels[0];
+ }
+ else
+ {
+ hostOutputFrameCount = &bp->hostOutputFrameCount[1];
+ hostOutputChannels = bp->hostOutputChannels[1];
+ }
+
+ framesToProcess = PA_MIN_( *hostInputFrameCount,
+ *hostOutputFrameCount );
+
+ assert( framesToProcess != 0 );
+
+ framesProcessedThisIteration = NonAdaptingProcess( bp, streamCallbackResult,
+ hostInputChannels, hostOutputChannels,
+ framesToProcess );
+
+ *hostInputFrameCount -= framesProcessedThisIteration;
+ *hostOutputFrameCount -= framesProcessedThisIteration;
+
+ framesProcessed += framesProcessedThisIteration;
+ framesToGo -= framesProcessedThisIteration;
+
+ }while( framesToGo > 0 );
+ }
+ else
+ {
+ /* half duplex non-adapting process, just process 1st and 2nd buffer */
+ /* process first buffer */
+
+ framesToProcess = (bp->inputChannelCount != 0)
+ ? bp->hostInputFrameCount[0]
+ : bp->hostOutputFrameCount[0];
+
+ framesProcessed = NonAdaptingProcess( bp, streamCallbackResult,
+ bp->hostInputChannels[0], bp->hostOutputChannels[0],
+ framesToProcess );
+
+ /* process second buffer if provided */
+
+ framesToProcess = (bp->inputChannelCount != 0)
+ ? bp->hostInputFrameCount[1]
+ : bp->hostOutputFrameCount[1];
+ if( framesToProcess > 0 )
+ {
+ framesProcessed += NonAdaptingProcess( bp, streamCallbackResult,
+ bp->hostInputChannels[1], bp->hostOutputChannels[1],
+ framesToProcess );
+ }
+ }
+ }
+ else /* block adaption necessary*/
+ {
+
+ if( bp->inputChannelCount != 0 && bp->outputChannelCount != 0 )
+ {
+ /* full duplex */
+
+ if( bp->hostBufferSizeMode == paUtilVariableHostBufferSizePartialUsageAllowed )
+ {
+ framesProcessed = AdaptingProcess( bp, streamCallbackResult,
+ 0 /* dont process partial user buffers */ );
+ }
+ else
+ {
+ framesProcessed = AdaptingProcess( bp, streamCallbackResult,
+ 1 /* process partial user buffers */ );
+ }
+ }
+ else if( bp->inputChannelCount != 0 )
+ {
+ /* input only */
+ framesToProcess = bp->hostInputFrameCount[0];
+
+ framesProcessed = AdaptingInputOnlyProcess( bp, streamCallbackResult,
+ bp->hostInputChannels[0], framesToProcess );
+
+ framesToProcess = bp->hostInputFrameCount[1];
+ if( framesToProcess > 0 )
+ {
+ framesProcessed += AdaptingInputOnlyProcess( bp, streamCallbackResult,
+ bp->hostInputChannels[1], framesToProcess );
+ }
+ }
+ else
+ {
+ /* output only */
+ framesToProcess = bp->hostOutputFrameCount[0];
+
+ framesProcessed = AdaptingOutputOnlyProcess( bp, streamCallbackResult,
+ bp->hostOutputChannels[0], framesToProcess );
+
+ framesToProcess = bp->hostOutputFrameCount[1];
+ if( framesToProcess > 0 )
+ {
+ framesProcessed += AdaptingOutputOnlyProcess( bp, streamCallbackResult,
+ bp->hostOutputChannels[1], framesToProcess );
+ }
+ }
+ }
+
+ return framesProcessed;
+}
+
+
+int PaUtil_IsBufferProcessorOutputEmpty( PaUtilBufferProcessor* bp )
+{
+ return (bp->framesInTempOutputBuffer) ? 0 : 1;
+}
+
+
+unsigned long PaUtil_CopyInput( PaUtilBufferProcessor* bp,
+ void **buffer, unsigned long frameCount )
+{
+ PaUtilChannelDescriptor *hostInputChannels;
+ unsigned int framesToCopy;
+ unsigned char *destBytePtr;
+ void **nonInterleavedDestPtrs;
+ unsigned int destSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int destChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int i;
+
+ hostInputChannels = bp->hostInputChannels[0];
+ framesToCopy = PA_MIN_( bp->hostInputFrameCount[0], frameCount );
+
+ if( bp->userInputIsInterleaved )
+ {
+ destBytePtr = (unsigned char*)*buffer;
+
+ destSampleStrideSamples = bp->inputChannelCount;
+ destChannelStrideBytes = bp->bytesPerUserInputSample;
+
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ bp->inputConverter( destBytePtr, destSampleStrideSamples,
+ hostInputChannels[i].data,
+ hostInputChannels[i].stride,
+ framesToCopy, &bp->ditherGenerator );
+
+ destBytePtr += destChannelStrideBytes; /* skip to next source channel */
+
+ /* advance dest ptr for next iteration */
+ hostInputChannels[i].data = ((unsigned char*)hostInputChannels[i].data) +
+ framesToCopy * hostInputChannels[i].stride * bp->bytesPerHostInputSample;
+ }
+
+ /* advance callers dest pointer (buffer) */
+ *buffer = ((unsigned char *)*buffer) +
+ framesToCopy * bp->inputChannelCount * bp->bytesPerUserInputSample;
+ }
+ else
+ {
+ /* user input is not interleaved */
+
+ nonInterleavedDestPtrs = (void**)*buffer;
+
+ destSampleStrideSamples = 1;
+
+ for( i=0; i<bp->inputChannelCount; ++i )
+ {
+ destBytePtr = (unsigned char*)nonInterleavedDestPtrs[i];
+
+ bp->inputConverter( destBytePtr, destSampleStrideSamples,
+ hostInputChannels[i].data,
+ hostInputChannels[i].stride,
+ framesToCopy, &bp->ditherGenerator );
+
+ /* advance callers dest pointer (nonInterleavedDestPtrs[i]) */
+ destBytePtr += bp->bytesPerUserInputSample * framesToCopy;
+ nonInterleavedDestPtrs[i] = destBytePtr;
+
+ /* advance dest ptr for next iteration */
+ hostInputChannels[i].data = ((unsigned char*)hostInputChannels[i].data) +
+ framesToCopy * hostInputChannels[i].stride * bp->bytesPerHostInputSample;
+ }
+ }
+
+ bp->hostInputFrameCount[0] -= framesToCopy;
+
+ return framesToCopy;
+}
+
+unsigned long PaUtil_CopyOutput( PaUtilBufferProcessor* bp,
+ const void ** buffer, unsigned long frameCount )
+{
+ PaUtilChannelDescriptor *hostOutputChannels;
+ unsigned int framesToCopy;
+ unsigned char *srcBytePtr;
+ void **nonInterleavedSrcPtrs;
+ unsigned int srcSampleStrideSamples; /* stride from one sample to the next within a channel, in samples */
+ unsigned int srcChannelStrideBytes; /* stride from one channel to the next, in bytes */
+ unsigned int i;
+
+ hostOutputChannels = bp->hostOutputChannels[0];
+ framesToCopy = PA_MIN_( bp->hostOutputFrameCount[0], frameCount );
+
+ if( bp->userOutputIsInterleaved )
+ {
+ srcBytePtr = (unsigned char*)*buffer;
+
+ srcSampleStrideSamples = bp->outputChannelCount;
+ srcChannelStrideBytes = bp->bytesPerUserOutputSample;
+
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ bp->outputConverter( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ srcBytePtr, srcSampleStrideSamples,
+ framesToCopy, &bp->ditherGenerator );
+
+ srcBytePtr += srcChannelStrideBytes; /* skip to next source channel */
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ framesToCopy * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+
+ /* advance callers source pointer (buffer) */
+ *buffer = ((unsigned char *)*buffer) +
+ framesToCopy * bp->outputChannelCount * bp->bytesPerUserOutputSample;
+
+ }
+ else
+ {
+ /* user output is not interleaved */
+
+ nonInterleavedSrcPtrs = (void**)*buffer;
+
+ srcSampleStrideSamples = 1;
+
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ srcBytePtr = (unsigned char*)nonInterleavedSrcPtrs[i];
+
+ bp->outputConverter( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ srcBytePtr, srcSampleStrideSamples,
+ framesToCopy, &bp->ditherGenerator );
+
+
+ /* advance callers source pointer (nonInterleavedSrcPtrs[i]) */
+ srcBytePtr += bp->bytesPerUserOutputSample * framesToCopy;
+ nonInterleavedSrcPtrs[i] = srcBytePtr;
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ framesToCopy * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+ }
+
+ bp->hostOutputFrameCount[0] += framesToCopy;
+
+ return framesToCopy;
+}
+
+
+unsigned long PaUtil_ZeroOutput( PaUtilBufferProcessor* bp, unsigned long frameCount )
+{
+ PaUtilChannelDescriptor *hostOutputChannels;
+ unsigned int framesToZero;
+ unsigned int i;
+
+ hostOutputChannels = bp->hostOutputChannels[0];
+ framesToZero = PA_MIN_( bp->hostOutputFrameCount[0], frameCount );
+
+ for( i=0; i<bp->outputChannelCount; ++i )
+ {
+ bp->outputZeroer( hostOutputChannels[i].data,
+ hostOutputChannels[i].stride,
+ framesToZero );
+
+
+ /* advance dest ptr for next iteration */
+ hostOutputChannels[i].data = ((unsigned char*)hostOutputChannels[i].data) +
+ framesToZero * hostOutputChannels[i].stride * bp->bytesPerHostOutputSample;
+ }
+
+ bp->hostOutputFrameCount[0] += framesToZero;
+
+ return framesToZero;
+}
diff --git a/portaudio/pa_common/pa_process.h b/portaudio/pa_common/pa_process.h
new file mode 100644
index 0000000000000000000000000000000000000000..8d13d903a4428416ec1d176f8afc548509006bb4
--- /dev/null
+++ b/portaudio/pa_common/pa_process.h
@@ -0,0 +1,741 @@
+#ifndef PA_PROCESS_H
+#define PA_PROCESS_H
+/*
+ * $Id$
+ * Portable Audio I/O Library callback buffer processing adapters
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Phil Burk, Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Buffer Processor prototypes. A Buffer Processor performs buffer length
+ adaption, coordinates sample format conversion, and interleaves/deinterleaves
+ channels.
+
+ <h3>Overview</h3>
+
+ The "Buffer Processor" (PaUtilBufferProcessor) manages conversion of audio
+ data from host buffers to user buffers and back again. Where required, the
+ buffer processor takes care of converting between host and user sample formats,
+ interleaving and deinterleaving multichannel buffers, and adapting between host
+ and user buffers with different lengths. The buffer processor may be used with
+ full and half duplex streams, for both callback streams and blocking read/write
+ streams.
+
+ One of the important capabilities provided by the buffer processor is
+ the ability to adapt between user and host buffer sizes of different lengths
+ with minimum latency. Although this task is relatively easy to perform when
+ the host buffer size is an integer multiple of the user buffer size, the
+ problem is more complicated when this is not the case - especially for
+ full-duplex callback streams. Where necessary the adaption is implemented by
+ internally buffering some input and/or output data. The buffer adation
+ algorithm used by the buffer processor was originally implemented by
+ Stephan Letz for the ASIO version of PortAudio, and is described in his
+ Callback_adaption_.pdf which is included in the distribution.
+
+ The buffer processor performs sample conversion using the functions provided
+ by pa_converters.c.
+
+ The following sections provide an overview of how to use the buffer processor.
+ Interested readers are advised to consult the host API implementations for
+ examples of buffer processor usage.
+
+
+ <h4>Initialization, resetting and termination</h4>
+
+ When a stream is opened, the buffer processor should be initialized using
+ PaUtil_InitializeBufferProcessor. This function initializes internal state
+ and allocates temporary buffers as neccesary according to the supplied
+ configuration parameters. Some of the parameters correspond to those requested
+ by the user in their call to Pa_OpenStream(), others reflect the requirements
+ of the host API implementation - they indicate host buffer sizes, formats,
+ and the type of buffering which the Host API uses. The buffer processor should
+ be initialized for callback streams and blocking read/write streams.
+
+ Call PaUtil_ResetBufferProcessor to clear any sample data which is present
+ in the buffer processor before starting to use it (for example when
+ Pa_StartStream is called).
+
+ When the buffer processor is no longer used call
+ PaUtil_TerminateBufferProcessor.
+
+
+ <h4>Using the buffer processor for a callback stream</h4>
+
+ The buffer processor's role in a callback stream is to take host input buffers
+ process them with the stream callback, and fill host output buffers. For a
+ full duplex stream, the buffer processor handles input and output simultaneously
+ due to the requirements of the minimum-latency buffer adation algorithm.
+
+ When a host buffer becomes available, the implementation should call
+ the buffer processor to process the buffer. The buffer processor calls the
+ stream callback to consume and/or produce audio data as necessary. The buffer
+ processor will convert sample formats, interleave/deinterleave channels,
+ and slice or chunk the data to the appropriate buffer lengths according to
+ the requirements of the stream callback and the host API.
+
+ To process a host buffer (or a pair of host buffers for a full-duplex stream)
+ use the following calling sequence:
+
+ -# Call PaUtil_BeginBufferProcessing
+ -# For a stream which takes input:
+ - Call PaUtil_SetInputFrameCount with the number of frames in the host input
+ buffer.
+ - Call one of the following functions one or more times to tell the
+ buffer processor about the host input buffer(s): PaUtil_SetInputChannel,
+ PaUtil_SetInterleavedInputChannels, PaUtil_SetNonInterleavedInputChannel.
+ Which function you call will depend on whether the host buffer(s) are
+ interleaved or not.
+ - If the available host data is split accross two buffers (for example a
+ data range at the end of a circular buffer and another range at the
+ beginning of the circular buffer), also call
+ PaUtil_Set2ndInputFrameCount, PaUtil_Set2ndInputChannel,
+ PaUtil_Set2ndInterleavedInputChannels,
+ PaUtil_Set2ndNonInterleavedInputChannel as necessary to tell the buffer
+ processor about the second buffer.
+ -# For a stream which generates output:
+ - Call PaUtil_SetOutputFrameCount with the number of frames in the host
+ output buffer.
+ - Call one of the following functions one or more times to tell the
+ buffer processor about the host output buffer(s): PaUtil_SetOutputChannel,
+ PaUtil_SetInterleavedOutputChannels, PaUtil_SetNonInterleavedOutputChannel.
+ Which function you call will depend on whether the host buffer(s) are
+ interleaved or not.
+ - If the available host output buffer space is split accross two buffers
+ (for example a data range at the end of a circular buffer and another
+ range at the beginning of the circular buffer), call
+ PaUtil_Set2ndOutputFrameCount, PaUtil_Set2ndOutputChannel,
+ PaUtil_Set2ndInterleavedOutputChannels,
+ PaUtil_Set2ndNonInterleavedOutputChannel as necessary to tell the buffer
+ processor about the second buffer.
+ -# Call PaUtil_EndBufferProcessing, this function performs the actual data
+ conversion and processing.
+
+
+ <h4>Using the buffer processor for a blocking read/write stream</h4>
+
+ Blocking read/write streams use the buffer processor to convert and copy user
+ output data to a host buffer, and to convert and copy host input data to
+ the user's buffer. The buffer processor does not perform any buffer adaption.
+ When using the buffer processor in a blocking read/write stream the input and
+ output conversion are performed separately by the PaUtil_CopyInput and
+ PaUtil_CopyOutput functions.
+
+ To copy data from a host input buffer to the buffer(s) which the user supplies
+ to Pa_ReadStream, use the following calling sequence.
+
+ - Repeat the following three steps until the user buffer(s) have been filled
+ with samples from the host input buffers:
+ -# Call PaUtil_SetInputFrameCount with the number of frames in the host
+ input buffer.
+ -# Call one of the following functions one or more times to tell the
+ buffer processor about the host input buffer(s): PaUtil_SetInputChannel,
+ PaUtil_SetInterleavedInputChannels, PaUtil_SetNonInterleavedInputChannel.
+ Which function you call will depend on whether the host buffer(s) are
+ interleaved or not.
+ -# Call PaUtil_CopyInput with the user buffer pointer (or a copy of the
+ array of buffer pointers for a non-interleaved stream) passed to
+ Pa_ReadStream, along with the number of frames in the user buffer(s).
+ Be careful to pass a <i>copy</i> of the user buffer pointers to
+ PaUtil_CopyInput because PaUtil_CopyInput advances the pointers to
+ the start of the next region to copy.
+ - PaUtil_CopyInput will not copy more data than is available in the
+ host buffer(s), so the above steps need to be repeated until the user
+ buffer(s) are full.
+
+
+ To copy data to the host output buffer from the user buffers(s) supplied
+ to Pa_WriteStream use the following calling sequence.
+
+ - Repeat the following three steps until all frames from the user buffer(s)
+ have been copied to the host API:
+ -# Call PaUtil_SetOutputFrameCount with the number of frames in the host
+ output buffer.
+ -# Call one of the following functions one or more times to tell the
+ buffer processor about the host output buffer(s): PaUtil_SetOutputChannel,
+ PaUtil_SetInterleavedOutputChannels, PaUtil_SetNonInterleavedOutputChannel.
+ Which function you call will depend on whether the host buffer(s) are
+ interleaved or not.
+ -# Call PaUtil_CopyOutput with the user buffer pointer (or a copy of the
+ array of buffer pointers for a non-interleaved stream) passed to
+ Pa_WriteStream, along with the number of frames in the user buffer(s).
+ Be careful to pass a <i>copy</i> of the user buffer pointers to
+ PaUtil_CopyOutput because PaUtil_CopyOutput advances the pointers to
+ the start of the next region to copy.
+ - PaUtil_CopyOutput will not copy more data than fits in the host buffer(s),
+ so the above steps need to be repeated until all user data is copied.
+*/
+
+
+#include "portaudio.h"
+#include "pa_converters.h"
+#include "pa_dither.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+/** @brief Mode flag passed to PaUtil_InitializeBufferProcessor indicating the type
+ of buffering that the host API uses.
+
+ The mode used depends on whether the host API or the implementation manages
+ the buffers, and how these buffers are used (scatter gather, circular buffer).
+*/
+typedef enum {
+/** The host buffer size is a fixed known size. */
+ paUtilFixedHostBufferSize,
+
+/** The host buffer size may vary, but has a known maximum size. */
+ paUtilBoundedHostBufferSize,
+
+/** Nothing is known about the host buffer size. */
+ paUtilUnknownHostBufferSize,
+
+/** The host buffer size varies, and the client does not require the buffer
+ processor to consume all of the input and fill all of the output buffer. This
+ is useful when the implementation has access to the host API's circular buffer
+ and only needs to consume/fill some of it, not necessarily all of it, with each
+ call to the buffer processor. This is the only mode where
+ PaUtil_EndBufferProcessing() may not consume the whole buffer.
+*/
+ paUtilVariableHostBufferSizePartialUsageAllowed
+}PaUtilHostBufferSizeMode;
+
+
+/** @brief An auxilliary data structure used internally by the buffer processor
+ to represent host input and output buffers. */
+typedef struct PaUtilChannelDescriptor{
+ void *data;
+ unsigned int stride; /**< stride in samples, not bytes */
+}PaUtilChannelDescriptor;
+
+
+/** @brief The main buffer processor data structure.
+
+ Allocate one of these, initialize it with PaUtil_InitializeBufferProcessor
+ and terminate it with PaUtil_TerminateBufferProcessor.
+*/
+typedef struct {
+ unsigned long framesPerUserBuffer;
+ unsigned long framesPerHostBuffer;
+
+ PaUtilHostBufferSizeMode hostBufferSizeMode;
+ int useNonAdaptingProcess;
+ unsigned long framesPerTempBuffer;
+
+ unsigned int inputChannelCount;
+ unsigned int bytesPerHostInputSample;
+ unsigned int bytesPerUserInputSample;
+ int userInputIsInterleaved;
+ PaUtilConverter *inputConverter;
+ PaUtilZeroer *inputZeroer;
+
+ unsigned int outputChannelCount;
+ unsigned int bytesPerHostOutputSample;
+ unsigned int bytesPerUserOutputSample;
+ int userOutputIsInterleaved;
+ PaUtilConverter *outputConverter;
+ PaUtilZeroer *outputZeroer;
+
+ unsigned long initialFramesInTempInputBuffer;
+ unsigned long initialFramesInTempOutputBuffer;
+
+ void *tempInputBuffer; /**< used for slips, block adaption, and conversion. */
+ void **tempInputBufferPtrs; /**< storage for non-interleaved buffer pointers, NULL for interleaved user input */
+ unsigned long framesInTempInputBuffer; /**< frames remaining in input buffer from previous adaption iteration */
+
+ void *tempOutputBuffer; /**< used for slips, block adaption, and conversion. */
+ void **tempOutputBufferPtrs; /**< storage for non-interleaved buffer pointers, NULL for interleaved user output */
+ unsigned long framesInTempOutputBuffer; /**< frames remaining in input buffer from previous adaption iteration */
+
+ PaStreamCallbackTimeInfo *timeInfo;
+
+ PaStreamCallbackFlags callbackStatusFlags;
+
+ unsigned long hostInputFrameCount[2];
+ PaUtilChannelDescriptor *hostInputChannels[2]; /**< pointers to arrays of channel descriptors.
+ pointers are NULL for half-duplex output processing.
+ hostInputChannels[i].data is NULL when the caller
+ calls PaUtil_SetNoInput()
+ */
+ unsigned long hostOutputFrameCount[2];
+ PaUtilChannelDescriptor *hostOutputChannels[2]; /**< pointers to arrays of channel descriptors.
+ pointers are NULL for half-duplex input processing.
+ hostOutputChannels[i].data is NULL when the caller
+ calls PaUtil_SetNoOutput()
+ */
+
+ PaUtilTriangularDitherGenerator ditherGenerator;
+
+ double samplePeriod;
+
+ PaStreamCallback *streamCallback;
+ void *userData;
+} PaUtilBufferProcessor;
+
+
+/** @name Initialization, termination, resetting and info */
+/*@{*/
+
+/** Initialize a buffer processor's representation stored in a
+ PaUtilBufferProcessor structure. Be sure to call
+ PaUtil_TerminateBufferProcessor after finishing with a buffer processor.
+
+ @param bufferProcessor The buffer processor structure to initialize.
+
+ @param inputChannelCount The number of input channels as passed to
+ Pa_OpenStream or 0 for an output-only stream.
+
+ @param userInputSampleFormat Format of user input samples, as passed to
+ Pa_OpenStream. This parameter is ignored for ouput-only streams.
+
+ @param hostInputSampleFormat Format of host input samples. This parameter is
+ ignored for output-only streams. See note about host buffer interleave below.
+
+ @param outputChannelCount The number of output channels as passed to
+ Pa_OpenStream or 0 for an input-only stream.
+
+ @param userOutputSampleFormat Format of user output samples, as passed to
+ Pa_OpenStream. This parameter is ignored for input-only streams.
+
+ @param hostOutputSampleFormat Format of host output samples. This parameter is
+ ignored for input-only streams. See note about host buffer interleave below.
+
+ @param sampleRate Sample rate of the stream. The more accurate this is the
+ better - it is used for updating time stamps when adapting buffers.
+
+ @param streamFlags Stream flags as passed to Pa_OpenStream, this parameter is
+ used for selecting special sample conversion options such as clipping and
+ dithering.
+
+ @param framesPerUserBuffer Number of frames per user buffer, as requested
+ by the framesPerBuffer parameter to Pa_OpenStream. This parameter may be
+ zero to indicate that the user will accept any (and varying) buffer sizes.
+
+ @param framesPerHostBuffer Specifies the number of frames per host buffer
+ for the fixed buffer size mode, and the maximum number of frames
+ per host buffer for the bounded host buffer size mode. It is ignored for
+ the other modes.
+
+ @param hostBufferSizeMode A mode flag indicating the size variability of
+ host buffers that will be passed to the buffer processor. See
+ PaUtilHostBufferSizeMode for further details.
+
+ @param streamCallback The user stream callback passed to Pa_OpenStream.
+
+ @param userData The user data field passed to Pa_OpenStream.
+
+ @note The interleave flag is ignored for host buffer formats. Host
+ interleave is determined by the use of different SetInput and SetOutput
+ functions.
+
+ @return An error code indicating whether the initialization was successful.
+ If the error code is not PaNoError, the buffer processor was not initialized
+ and should not be used.
+
+ @see Pa_OpenStream, PaUtilHostBufferSizeMode, PaUtil_TerminateBufferProcessor
+*/
+PaError PaUtil_InitializeBufferProcessor( PaUtilBufferProcessor* bufferProcessor,
+ int inputChannelCount, PaSampleFormat userInputSampleFormat,
+ PaSampleFormat hostInputSampleFormat,
+ int outputChannelCount, PaSampleFormat userOutputSampleFormat,
+ PaSampleFormat hostOutputSampleFormat,
+ double sampleRate,
+ PaStreamFlags streamFlags,
+ unsigned long framesPerUserBuffer, /* 0 indicates don't care */
+ unsigned long framesPerHostBuffer,
+ PaUtilHostBufferSizeMode hostBufferSizeMode,
+ PaStreamCallback *streamCallback, void *userData );
+
+
+/** Terminate a buffer processor's representation. Deallocates any temporary
+ buffers allocated by PaUtil_InitializeBufferProcessor.
+
+ @param bufferProcessor The buffer processor structure to terminate.
+
+ @see PaUtil_InitializeBufferProcessor.
+*/
+void PaUtil_TerminateBufferProcessor( PaUtilBufferProcessor* bufferProcessor );
+
+
+/** Clear any internally buffered data. If you call
+ PaUtil_InitializeBufferProcessor in your OpenStream routine, make sure you
+ call PaUtil_ResetBufferProcessor in your StartStream call.
+
+ @param bufferProcessor The buffer processor to reset.
+*/
+void PaUtil_ResetBufferProcessor( PaUtilBufferProcessor* bufferProcessor );
+
+
+/** Retrieve the input latency of a buffer processor.
+
+ @param bufferProcessor The buffer processor examine.
+
+ @return The input latency introduced by the buffer processor, in frames.
+
+ @see PaUtil_GetBufferProcessorOutputLatency
+*/
+unsigned long PaUtil_GetBufferProcessorInputLatency( PaUtilBufferProcessor* bufferProcessor );
+
+/** Retrieve the output latency of a buffer processor.
+
+ @param bufferProcessor The buffer processor examine.
+
+ @return The output latency introduced by the buffer processor, in frames.
+
+ @see PaUtil_GetBufferProcessorInputLatency
+*/
+unsigned long PaUtil_GetBufferProcessorOutputLatency( PaUtilBufferProcessor* bufferProcessor );
+
+/*@}*/
+
+
+/** @name Host buffer pointer configuration
+
+ Functions to set host input and output buffers, used by both callback streams
+ and blocking read/write streams.
+*/
+/*@{*/
+
+
+/** Set the number of frames in the input host buffer(s) specified by the
+ PaUtil_Set*InputChannel functions.
+
+ @param bufferProcessor The buffer processor.
+
+ @param frameCount The number of host input frames. A 0 frameCount indicates to
+ use the framesPerHostBuffer value passed to PaUtil_InitializeBufferProcessor.
+
+ @see PaUtil_SetNoInput, PaUtil_SetInputChannel,
+ PaUtil_SetInterleavedInputChannels, PaUtil_SetNonInterleavedInputChannel
+*/
+void PaUtil_SetInputFrameCount( PaUtilBufferProcessor* bufferProcessor,
+ unsigned long frameCount );
+
+
+/** Indicate that no input is avalable. This function should be used when
+ priming the output of a full-duplex stream opened with the
+ paPrimeOutputBuffersUsingStreamCallback flag. Note that it is not necessary
+ to call this or any othe PaUtil_Set*Input* functions for ouput-only streams.
+
+ @param bufferProcessor The buffer processor.
+*/
+void PaUtil_SetNoInput( PaUtilBufferProcessor* bufferProcessor );
+
+
+/** Provide the buffer processor with a pointer to a host input channel.
+
+ @param bufferProcessor The buffer processor.
+ @param channel The channel number.
+ @param data The buffer.
+ @param stride The stride from one sample to the next, in samples. For
+ interleaved host buffers, the stride will usually be the same as the number of
+ channels in the buffer.
+*/
+void PaUtil_SetInputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data, unsigned int stride );
+
+
+/** Provide the buffer processor with a pointer to an number of interleaved
+ host input channels.
+
+ @param bufferProcessor The buffer processor.
+ @param firstChannel The first channel number.
+ @param data The buffer.
+ @param channelCount The number of interleaved channels in the buffer. If
+ channelCount is zero, the number of channels specified to
+ PaUtil_InitializeBufferProcessor will be used.
+*/
+void PaUtil_SetInterleavedInputChannels( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int firstChannel, void *data, unsigned int channelCount );
+
+
+/** Provide the buffer processor with a pointer to one non-interleaved host
+ output channel.
+
+ @param bufferProcessor The buffer processor.
+ @param channel The channel number.
+ @param data The buffer.
+*/
+void PaUtil_SetNonInterleavedInputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data );
+
+
+/** Use for the second buffer half when the input buffer is split in two halves.
+ @see PaUtil_SetInputFrameCount
+*/
+void PaUtil_Set2ndInputFrameCount( PaUtilBufferProcessor* bufferProcessor,
+ unsigned long frameCount );
+
+/** Use for the second buffer half when the input buffer is split in two halves.
+ @see PaUtil_SetInputChannel
+*/
+void PaUtil_Set2ndInputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data, unsigned int stride );
+
+/** Use for the second buffer half when the input buffer is split in two halves.
+ @see PaUtil_SetInterleavedInputChannels
+*/
+void PaUtil_Set2ndInterleavedInputChannels( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int firstChannel, void *data, unsigned int channelCount );
+
+/** Use for the second buffer half when the input buffer is split in two halves.
+ @see PaUtil_SetNonInterleavedInputChannel
+*/
+void PaUtil_Set2ndNonInterleavedInputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data );
+
+
+/** Set the number of frames in the output host buffer(s) specified by the
+ PaUtil_Set*OutputChannel functions.
+
+ @param bufferProcessor The buffer processor.
+
+ @param frameCount The number of host output frames. A 0 frameCount indicates to
+ use the framesPerHostBuffer value passed to PaUtil_InitializeBufferProcessor.
+
+ @see PaUtil_SetOutputChannel, PaUtil_SetInterleavedOutputChannels,
+ PaUtil_SetNonInterleavedOutputChannel
+*/
+void PaUtil_SetOutputFrameCount( PaUtilBufferProcessor* bufferProcessor,
+ unsigned long frameCount );
+
+
+/** Indicate that the output will be discarded. This function should be used
+ when implementing the paNeverDropInput mode for full duplex streams.
+
+ @param bufferProcessor The buffer processor.
+*/
+void PaUtil_SetNoOutput( PaUtilBufferProcessor* bufferProcessor );
+
+
+/** Provide the buffer processor with a pointer to a host output channel.
+
+ @param bufferProcessor The buffer processor.
+ @param channel The channel number.
+ @param data The buffer.
+ @param stride The stride from one sample to the next, in samples. For
+ interleaved host buffers, the stride will usually be the same as the number of
+ channels in the buffer.
+*/
+void PaUtil_SetOutputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data, unsigned int stride );
+
+
+/** Provide the buffer processor with a pointer to a number of interleaved
+ host output channels.
+
+ @param bufferProcessor The buffer processor.
+ @param firstChannel The first channel number.
+ @param data The buffer.
+ @param channelCount The number of interleaved channels in the buffer. If
+ channelCount is zero, the number of channels specified to
+ PaUtil_InitializeBufferProcessor will be used.
+*/
+void PaUtil_SetInterleavedOutputChannels( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int firstChannel, void *data, unsigned int channelCount );
+
+
+/** Provide the buffer processor with a pointer to one non-interleaved host
+ output channel.
+
+ @param bufferProcessor The buffer processor.
+ @param channel The channel number.
+ @param data The buffer.
+*/
+void PaUtil_SetNonInterleavedOutputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data );
+
+
+/** Use for the second buffer half when the output buffer is split in two halves.
+ @see PaUtil_SetOutputFrameCount
+*/
+void PaUtil_Set2ndOutputFrameCount( PaUtilBufferProcessor* bufferProcessor,
+ unsigned long frameCount );
+
+/** Use for the second buffer half when the output buffer is split in two halves.
+ @see PaUtil_SetOutputChannel
+*/
+void PaUtil_Set2ndOutputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data, unsigned int stride );
+
+/** Use for the second buffer half when the output buffer is split in two halves.
+ @see PaUtil_SetInterleavedOutputChannels
+*/
+void PaUtil_Set2ndInterleavedOutputChannels( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int firstChannel, void *data, unsigned int channelCount );
+
+/** Use for the second buffer half when the output buffer is split in two halves.
+ @see PaUtil_SetNonInterleavedOutputChannel
+*/
+void PaUtil_Set2ndNonInterleavedOutputChannel( PaUtilBufferProcessor* bufferProcessor,
+ unsigned int channel, void *data );
+
+/*@}*/
+
+
+/** @name Buffer processing functions for callback streams
+*/
+/*@{*/
+
+/** Commence processing a host buffer (or a pair of host buffers in the
+ full-duplex case) for a callback stream.
+
+ @param bufferProcessor The buffer processor.
+
+ @param timeInfo Timing information for the first sample of the host
+ buffer(s). This information may be adjusted when buffer adaption is being
+ performed.
+
+ @param callbackStatusFlags Flags indicating whether underruns and overruns
+ have occurred since the last time the buffer processor was called.
+*/
+void PaUtil_BeginBufferProcessing( PaUtilBufferProcessor* bufferProcessor,
+ PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags callbackStatusFlags );
+
+
+/** Finish processing a host buffer (or a pair of host buffers in the
+ full-duplex case) for a callback stream.
+
+ @param bufferProcessor The buffer processor.
+
+ @param callbackResult On input, indicates a previous callback result, and on
+ exit, the result of the user stream callback, if it is called.
+ On entry callbackResult should contain one of { paContinue, paComplete, or
+ paAbort}. If paComplete is passed, the stream callback will not be called
+ but any audio that was generated by previous stream callbacks will be copied
+ to the output buffer(s). You can check whether the buffer processor's internal
+ buffer is empty by calling PaUtil_IsBufferProcessorOutputEmpty.
+
+ If the stream callback is called its result is stored in *callbackResult. If
+ the stream callback returns paComplete or paAbort, all output buffers will be
+ full of valid data - some of which may be zeros to acount for data that
+ wasn't generated by the terminating callback.
+
+ @return The number of frames processed. This usually corresponds to the
+ number of frames specified by the PaUtil_Set*FrameCount functions, exept in
+ the paUtilVariableHostBufferSizePartialUsageAllowed buffer size mode when a
+ smaller value may be returned.
+*/
+unsigned long PaUtil_EndBufferProcessing( PaUtilBufferProcessor* bufferProcessor,
+ int *callbackResult );
+
+
+/** Determine whether any callback generated output remains in the bufffer
+ processor's internal buffers. This method may be used to determine when to
+ continue calling PaUtil_EndBufferProcessing() after the callback has returned
+ a callbackResult of paComplete.
+
+ @param bufferProcessor The buffer processor.
+
+ @return Returns non-zero when callback generated output remains in the internal
+ buffer and zero (0) when there internal buffer contains no callback generated
+ data.
+*/
+int PaUtil_IsBufferProcessorOutputEmpty( PaUtilBufferProcessor* bufferProcessor );
+
+/*@}*/
+
+
+/** @name Buffer processing functions for blocking read/write streams
+*/
+/*@{*/
+
+/** Copy samples from host input channels set up by the PaUtil_Set*InputChannels
+ functions to a user supplied buffer. This function is intended for use with
+ blocking read/write streams. Copies the minimum of the number of
+ user frames (specified by the frameCount parameter) and the number of available
+ host frames (specified in a previous call to SetInputFrameCount()).
+
+ @param bufferProcessor The buffer processor.
+
+ @param buffer A pointer to the user buffer pointer, or a pointer to a pointer
+ to an array of user buffer pointers for a non-interleaved stream. It is
+ important that this parameter points to a copy of the user buffer pointers,
+ not to the actual user buffer pointers, because this function updates the
+ pointers before returning.
+
+ @param frameCount The number of frames of data in the buffer(s) pointed to by
+ the buffer parameter.
+
+ @return The number of frames copied. The buffer pointer(s) pointed to by the
+ buffer parameter are advanced to point to the frame(s) following the last one
+ filled.
+*/
+unsigned long PaUtil_CopyInput( PaUtilBufferProcessor* bufferProcessor,
+ void **buffer, unsigned long frameCount );
+
+
+/* Copy samples from a user supplied buffer to host output channels set up by
+ the PaUtil_Set*OutputChannels functions. This function is intended for use with
+ blocking read/write streams. Copies the minimum of the number of
+ user frames (specified by the frameCount parameter) and the number of
+ host frames (specified in a previous call to SetOutputFrameCount()).
+
+ @param bufferProcessor The buffer processor.
+
+ @param buffer A pointer to the user buffer pointer, or a pointer to a pointer
+ to an array of user buffer pointers for a non-interleaved stream. It is
+ important that this parameter points to a copy of the user buffer pointers,
+ not to the actual user buffer pointers, because this function updates the
+ pointers before returning.
+
+ @param frameCount The number of frames of data in the buffer(s) pointed to by
+ the buffer parameter.
+
+ @return The number of frames copied. The buffer pointer(s) pointed to by the
+ buffer parameter are advanced to point to the frame(s) following the last one
+ copied.
+*/
+unsigned long PaUtil_CopyOutput( PaUtilBufferProcessor* bufferProcessor,
+ const void ** buffer, unsigned long frameCount );
+
+
+/* Zero samples in host output channels set up by the PaUtil_Set*OutputChannels
+ functions. This function is useful for flushing streams.
+ Zeros the minimum of frameCount and the number of host frames specified in a
+ previous call to SetOutputFrameCount().
+
+ @param bufferProcessor The buffer processor.
+
+ @param frameCount The maximum number of frames to zero.
+
+ @return The number of frames zeroed.
+*/
+unsigned long PaUtil_ZeroOutput( PaUtilBufferProcessor* bufferProcessor,
+ unsigned long frameCount );
+
+
+/*@}*/
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_PROCESS_H */
diff --git a/portaudio/pa_common/pa_skeleton.c b/portaudio/pa_common/pa_skeleton.c
new file mode 100644
index 0000000000000000000000000000000000000000..51f95c8a3201d5605baf89dece660c402e8c9a7e
--- /dev/null
+++ b/portaudio/pa_common/pa_skeleton.c
@@ -0,0 +1,807 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library skeleton implementation
+ * demonstrates how to use the common functions to implement support
+ * for a host API
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Skeleton implementation of support for a host API.
+
+ @note This file is provided as a starting point for implementing support for
+ a new host API. IMPLEMENT ME comments are used to indicate functionality
+ which much be customised for each implementation.
+*/
+
+
+#include <string.h> /* strlen() */
+
+#include "pa_util.h"
+#include "pa_allocation.h"
+#include "pa_hostapi.h"
+#include "pa_stream.h"
+#include "pa_cpuload.h"
+#include "pa_process.h"
+
+
+/* prototypes for functions declared in this file */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate );
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData );
+static PaError CloseStream( PaStream* stream );
+static PaError StartStream( PaStream *stream );
+static PaError StopStream( PaStream *stream );
+static PaError AbortStream( PaStream *stream );
+static PaError IsStreamStopped( PaStream *s );
+static PaError IsStreamActive( PaStream *stream );
+static PaTime GetStreamTime( PaStream *stream );
+static double GetStreamCpuLoad( PaStream* stream );
+static PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
+static PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
+static signed long GetStreamReadAvailable( PaStream* stream );
+static signed long GetStreamWriteAvailable( PaStream* stream );
+
+
+/* IMPLEMENT ME: a macro like the following one should be used for reporting
+ host errors */
+#define PA_SKELETON_SET_LAST_HOST_ERROR( errorCode, errorText ) \
+ PaUtil_SetLastHostErrorInfo( paInDevelopment, errorCode, errorText )
+
+/* PaSkeletonHostApiRepresentation - host api datastructure specific to this implementation */
+
+typedef struct
+{
+ PaUtilHostApiRepresentation inheritedHostApiRep;
+ PaUtilStreamInterface callbackStreamInterface;
+ PaUtilStreamInterface blockingStreamInterface;
+
+ PaUtilAllocationGroup *allocations;
+
+ /* implementation specific data goes here */
+}
+PaSkeletonHostApiRepresentation; /* IMPLEMENT ME: rename this */
+
+
+PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
+{
+ PaError result = paNoError;
+ int i, deviceCount;
+ PaSkeletonHostApiRepresentation *skeletonHostApi;
+ PaDeviceInfo *deviceInfoArray;
+
+ skeletonHostApi = (PaSkeletonHostApiRepresentation*)PaUtil_AllocateMemory( sizeof(PaSkeletonHostApiRepresentation) );
+ if( !skeletonHostApi )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ skeletonHostApi->allocations = PaUtil_CreateAllocationGroup();
+ if( !skeletonHostApi->allocations )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ *hostApi = &skeletonHostApi->inheritedHostApiRep;
+ (*hostApi)->info.structVersion = 1;
+ (*hostApi)->info.type = paInDevelopment; /* IMPLEMENT ME: change to correct type id */
+ (*hostApi)->info.name = "skeleton implementation"; /* IMPLEMENT ME: change to correct name */
+
+ (*hostApi)->info.defaultInputDevice = paNoDevice; /* IMPLEMENT ME */
+ (*hostApi)->info.defaultOutputDevice = paNoDevice; /* IMPLEMENT ME */
+
+ (*hostApi)->info.deviceCount = 0;
+
+ deviceCount = 0; /* IMPLEMENT ME */
+
+ if( deviceCount > 0 )
+ {
+ (*hostApi)->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
+ skeletonHostApi->allocations, sizeof(PaDeviceInfo*) * deviceCount );
+ if( !(*hostApi)->deviceInfos )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ /* allocate all device info structs in a contiguous block */
+ deviceInfoArray = (PaDeviceInfo*)PaUtil_GroupAllocateMemory(
+ skeletonHostApi->allocations, sizeof(PaDeviceInfo) * deviceCount );
+ if( !deviceInfoArray )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ for( i=0; i < deviceCount; ++i )
+ {
+ PaDeviceInfo *deviceInfo = &deviceInfoArray[i];
+ deviceInfo->structVersion = 2;
+ deviceInfo->hostApi = hostApiIndex;
+ deviceInfo->name = 0; /* IMPLEMENT ME: allocate block and copy name eg:
+ deviceName = (char*)PaUtil_GroupAllocateMemory( skeletonHostApi->allocations, strlen(srcName) + 1 );
+ if( !deviceName )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+ strcpy( deviceName, srcName );
+ deviceInfo->name = deviceName;
+ */
+
+ deviceInfo->maxInputChannels = 0; /* IMPLEMENT ME */
+ deviceInfo->maxOutputChannels = 0; /* IMPLEMENT ME */
+
+ deviceInfo->defaultLowInputLatency = 0.; /* IMPLEMENT ME */
+ deviceInfo->defaultLowOutputLatency = 0.; /* IMPLEMENT ME */
+ deviceInfo->defaultHighInputLatency = 0.; /* IMPLEMENT ME */
+ deviceInfo->defaultHighOutputLatency = 0.; /* IMPLEMENT ME */
+
+ deviceInfo->defaultSampleRate = 0.; /* IMPLEMENT ME */
+
+ (*hostApi)->deviceInfos[i] = deviceInfo;
+ ++(*hostApi)->info.deviceCount;
+ }
+ }
+
+ (*hostApi)->Terminate = Terminate;
+ (*hostApi)->OpenStream = OpenStream;
+ (*hostApi)->IsFormatSupported = IsFormatSupported;
+
+ PaUtil_InitializeStreamInterface( &skeletonHostApi->callbackStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, GetStreamCpuLoad,
+ PaUtil_DummyRead, PaUtil_DummyWrite,
+ PaUtil_DummyGetReadAvailable, PaUtil_DummyGetWriteAvailable );
+
+ PaUtil_InitializeStreamInterface( &skeletonHostApi->blockingStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, PaUtil_DummyGetCpuLoad,
+ ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
+
+ return result;
+
+error:
+ if( skeletonHostApi )
+ {
+ if( skeletonHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( skeletonHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( skeletonHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( skeletonHostApi );
+ }
+ return result;
+}
+
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
+{
+ PaSkeletonHostApiRepresentation *skeletonHostApi = (PaSkeletonHostApiRepresentation*)hostApi;
+
+ /*
+ IMPLEMENT ME:
+ - clean up any resources not handled by the allocation group
+ */
+
+ if( skeletonHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( skeletonHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( skeletonHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( skeletonHostApi );
+}
+
+
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate )
+{
+ int inputChannelCount, outputChannelCount;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+
+ if( inputParameters )
+ {
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+
+ /* all standard sample formats are supported by the buffer adapter,
+ this implementation doesn't support any custom sample formats */
+ if( inputSampleFormat & paCustomFormat )
+ return paSampleFormatNotSupported;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that input device can support inputChannelCount */
+ if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
+ return paInvalidChannelCount;
+
+ /* validate inputStreamInfo */
+ if( inputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ inputChannelCount = 0;
+ }
+
+ if( outputParameters )
+ {
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+
+ /* all standard sample formats are supported by the buffer adapter,
+ this implementation doesn't support any custom sample formats */
+ if( outputSampleFormat & paCustomFormat )
+ return paSampleFormatNotSupported;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that output device can support outputChannelCount */
+ if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
+ return paInvalidChannelCount;
+
+ /* validate outputStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ outputChannelCount = 0;
+ }
+
+ /*
+ IMPLEMENT ME:
+
+ - if a full duplex stream is requested, check that the combination
+ of input and output parameters is supported if necessary
+
+ - check that the device supports sampleRate
+
+ Because the buffer adapter handles conversion between all standard
+ sample formats, the following checks are only required if paCustomFormat
+ is implemented, or under some other unusual conditions.
+
+ - check that input device can support inputSampleFormat, or that
+ we have the capability to convert from inputSampleFormat to
+ a native format
+
+ - check that output device can support outputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+ */
+
+
+ /* suppress unused variable warnings */
+ (void) sampleRate;
+
+ return paFormatIsSupported;
+}
+
+/* PaSkeletonStream - a stream data structure specifically for this implementation */
+
+typedef struct PaSkeletonStream
+{ /* IMPLEMENT ME: rename this */
+ PaUtilStreamRepresentation streamRepresentation;
+ PaUtilCpuLoadMeasurer cpuLoadMeasurer;
+ PaUtilBufferProcessor bufferProcessor;
+
+ /* IMPLEMENT ME:
+ - implementation specific data goes here
+ */
+ unsigned long framesPerHostCallback; /* just an example */
+}
+PaSkeletonStream;
+
+/* see pa_hostapi.h for a list of validity guarantees made about OpenStream parameters */
+
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData )
+{
+ PaError result = paNoError;
+ PaSkeletonHostApiRepresentation *skeletonHostApi = (PaSkeletonHostApiRepresentation*)hostApi;
+ PaSkeletonStream *stream = 0;
+ unsigned long framesPerHostBuffer = framesPerBuffer; /* these may not be equivalent for all implementations */
+ int inputChannelCount, outputChannelCount;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+ PaSampleFormat hostInputSampleFormat, hostOutputSampleFormat;
+
+
+ if( inputParameters )
+ {
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that input device can support inputChannelCount */
+ if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
+ return paInvalidChannelCount;
+
+ /* validate inputStreamInfo */
+ if( inputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+
+ /* IMPLEMENT ME - establish which host formats are available */
+ hostInputSampleFormat =
+ PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, inputSampleFormat );
+ }
+ else
+ {
+ inputChannelCount = 0;
+ inputSampleFormat = hostInputSampleFormat = paInt16; /* Surpress 'uninitialised var' warnings. */
+ }
+
+ if( outputParameters )
+ {
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that output device can support inputChannelCount */
+ if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
+ return paInvalidChannelCount;
+
+ /* validate outputStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+
+ /* IMPLEMENT ME - establish which host formats are available */
+ hostOutputSampleFormat =
+ PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, outputSampleFormat );
+ }
+ else
+ {
+ outputChannelCount = 0;
+ outputSampleFormat = hostOutputSampleFormat = paInt16; /* Surpress 'uninitialized var' warnings. */
+ }
+
+ /*
+ IMPLEMENT ME:
+
+ ( the following two checks are taken care of by PaUtil_InitializeBufferProcessor() FIXME - checks needed? )
+
+ - check that input device can support inputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+
+ - check that output device can support outputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+
+ - if a full duplex stream is requested, check that the combination
+ of input and output parameters is supported
+
+ - check that the device supports sampleRate
+
+ - alter sampleRate to a close allowable rate if possible / necessary
+
+ - validate suggestedInputLatency and suggestedOutputLatency parameters,
+ use default values where necessary
+ */
+
+
+
+
+ /* validate platform specific flags */
+ if( (streamFlags & paPlatformSpecificFlags) != 0 )
+ return paInvalidFlag; /* unexpected platform specific flag */
+
+
+ stream = (PaSkeletonStream*)PaUtil_AllocateMemory( sizeof(PaSkeletonStream) );
+ if( !stream )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ if( streamCallback )
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &skeletonHostApi->callbackStreamInterface, streamCallback, userData );
+ }
+ else
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &skeletonHostApi->blockingStreamInterface, streamCallback, userData );
+ }
+
+ PaUtil_InitializeCpuLoadMeasurer( &stream->cpuLoadMeasurer, sampleRate );
+
+
+ /* we assume a fixed host buffer size in this example, but the buffer processor
+ can also support bounded and unknown host buffer sizes by passing
+ paUtilBoundedHostBufferSize or paUtilUnknownHostBufferSize instead of
+ paUtilFixedHostBufferSize below. */
+
+ result = PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
+ inputChannelCount, inputSampleFormat, hostInputSampleFormat,
+ outputChannelCount, outputSampleFormat, hostOutputSampleFormat,
+ sampleRate, streamFlags, framesPerBuffer,
+ framesPerHostBuffer, paUtilFixedHostBufferSize,
+ streamCallback, userData );
+ if( result != paNoError )
+ goto error;
+
+
+ /*
+ IMPLEMENT ME: initialise the following fields with estimated or actual
+ values.
+ */
+ stream->streamRepresentation.streamInfo.inputLatency =
+ PaUtil_GetBufferProcessorInputLatency(&stream->bufferProcessor);
+ stream->streamRepresentation.streamInfo.outputLatency =
+ PaUtil_GetBufferProcessorOutputLatency(&stream->bufferProcessor);
+ stream->streamRepresentation.streamInfo.sampleRate = sampleRate;
+
+
+ /*
+ IMPLEMENT ME:
+ - additional stream setup + opening
+ */
+
+ stream->framesPerHostCallback = framesPerHostBuffer;
+
+ *s = (PaStream*)stream;
+
+ return result;
+
+error:
+ if( stream )
+ PaUtil_FreeMemory( stream );
+
+ return result;
+}
+
+/*
+ ExampleHostProcessingLoop() illustrates the kind of processing which may
+ occur in a host implementation.
+
+*/
+static void ExampleHostProcessingLoop( void *inputBuffer, void *outputBuffer, void *userData )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)userData;
+ PaStreamCallbackTimeInfo timeInfo = {0,0,0}; /* IMPLEMENT ME */
+ int callbackResult;
+ unsigned long framesProcessed;
+
+ PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
+
+ /*
+ IMPLEMENT ME:
+ - generate timing information
+ - handle buffer slips
+ */
+
+ /*
+ If you need to byte swap or shift inputBuffer to convert it into a
+ portaudio format, do it here.
+ */
+
+
+
+ PaUtil_BeginBufferProcessing( &stream->bufferProcessor, &timeInfo, 0 /* IMPLEMENT ME: pass underflow/overflow flags when necessary */ );
+
+ /*
+ depending on whether the host buffers are interleaved, non-interleaved
+ or a mixture, you will want to call PaUtil_SetInterleaved*Channels(),
+ PaUtil_SetNonInterleaved*Channel() or PaUtil_Set*Channel() here.
+ */
+
+ PaUtil_SetInputFrameCount( &stream->bufferProcessor, 0 /* default to host buffer size */ );
+ PaUtil_SetInterleavedInputChannels( &stream->bufferProcessor,
+ 0, /* first channel of inputBuffer is channel 0 */
+ inputBuffer,
+ 0 ); /* 0 - use inputChannelCount passed to init buffer processor */
+
+ PaUtil_SetOutputFrameCount( &stream->bufferProcessor, 0 /* default to host buffer size */ );
+ PaUtil_SetInterleavedOutputChannels( &stream->bufferProcessor,
+ 0, /* first channel of outputBuffer is channel 0 */
+ outputBuffer,
+ 0 ); /* 0 - use outputChannelCount passed to init buffer processor */
+
+ /* you must pass a valid value of callback result to PaUtil_EndBufferProcessing()
+ in general you would pass paContinue for normal operation, and
+ paComplete to drain the buffer processor's internal output buffer.
+ You can check whether the buffer processor's output buffer is empty
+ using PaUtil_IsBufferProcessorOuputEmpty( bufferProcessor )
+ */
+ callbackResult = paContinue;
+ framesProcessed = PaUtil_EndBufferProcessing( &stream->bufferProcessor, &callbackResult );
+
+
+ /*
+ If you need to byte swap or shift outputBuffer to convert it to
+ host format, do it here.
+ */
+
+ PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, framesProcessed );
+
+
+ if( callbackResult == paContinue )
+ {
+ /* nothing special to do */
+ }
+ else if( callbackResult == paAbort )
+ {
+ /* IMPLEMENT ME - finish playback immediately */
+
+ /* once finished, call the finished callback */
+ if( stream->streamRepresentation.streamFinishedCallback != 0 )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+ }
+ else
+ {
+ /* User callback has asked us to stop with paComplete or other non-zero value */
+
+ /* IMPLEMENT ME - finish playback once currently queued audio has completed */
+
+ /* once finished, call the finished callback */
+ if( stream->streamRepresentation.streamFinishedCallback != 0 )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+ }
+}
+
+
+/*
+ When CloseStream() is called, the multi-api layer ensures that
+ the stream has already been stopped or aborted.
+*/
+static PaError CloseStream( PaStream* s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /*
+ IMPLEMENT ME:
+ - additional stream closing + cleanup
+ */
+
+ PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
+ PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
+ PaUtil_FreeMemory( stream );
+
+ return result;
+}
+
+
+static PaError StartStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ PaUtil_ResetBufferProcessor( &stream->bufferProcessor );
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ /* suppress unused function warning. the code in ExampleHostProcessingLoop or
+ something similar should be implemented to feed samples to and from the
+ host after StartStream() is called.
+ */
+ (void) ExampleHostProcessingLoop;
+
+ return result;
+}
+
+
+static PaError StopStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return result;
+}
+
+
+static PaError AbortStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return result;
+}
+
+
+static PaError IsStreamStopped( PaStream *s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return 0;
+}
+
+
+static PaError IsStreamActive( PaStream *s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return 0;
+}
+
+
+static PaTime GetStreamTime( PaStream *s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
+
+
+static double GetStreamCpuLoad( PaStream* s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ return PaUtil_GetCpuLoad( &stream->cpuLoadMeasurer );
+}
+
+
+/*
+ As separate stream interfaces are used for blocking and callback
+ streams, the following functions can be guaranteed to only be called
+ for blocking streams.
+*/
+
+static PaError ReadStream( PaStream* s,
+ void *buffer,
+ unsigned long frames )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) buffer;
+ (void) frames;
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return paNoError;
+}
+
+
+static PaError WriteStream( PaStream* s,
+ const void *buffer,
+ unsigned long frames )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) buffer;
+ (void) frames;
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return paNoError;
+}
+
+
+static signed long GetStreamReadAvailable( PaStream* s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
+
+
+static signed long GetStreamWriteAvailable( PaStream* s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
+
+
+
+
diff --git a/portaudio/pa_common/pa_stream.c b/portaudio/pa_common/pa_stream.c
new file mode 100644
index 0000000000000000000000000000000000000000..e820671bc1c5b0daf47b364d94ff0d8471f8f8d3
--- /dev/null
+++ b/portaudio/pa_common/pa_stream.c
@@ -0,0 +1,141 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library
+ *
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 2002 Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Interface used by pa_front to virtualize functions which operate on
+ streams.
+*/
+
+
+#include "pa_stream.h"
+
+
+void PaUtil_InitializeStreamInterface( PaUtilStreamInterface *streamInterface,
+ PaError (*Close)( PaStream* ),
+ PaError (*Start)( PaStream* ),
+ PaError (*Stop)( PaStream* ),
+ PaError (*Abort)( PaStream* ),
+ PaError (*IsStopped)( PaStream* ),
+ PaError (*IsActive)( PaStream* ),
+ PaTime (*GetTime)( PaStream* ),
+ double (*GetCpuLoad)( PaStream* ),
+ PaError (*Read)( PaStream*, void *, unsigned long ),
+ PaError (*Write)( PaStream*, const void *, unsigned long ),
+ signed long (*GetReadAvailable)( PaStream* ),
+ signed long (*GetWriteAvailable)( PaStream* ) )
+{
+ streamInterface->Close = Close;
+ streamInterface->Start = Start;
+ streamInterface->Stop = Stop;
+ streamInterface->Abort = Abort;
+ streamInterface->IsStopped = IsStopped;
+ streamInterface->IsActive = IsActive;
+ streamInterface->GetTime = GetTime;
+ streamInterface->GetCpuLoad = GetCpuLoad;
+ streamInterface->Read = Read;
+ streamInterface->Write = Write;
+ streamInterface->GetReadAvailable = GetReadAvailable;
+ streamInterface->GetWriteAvailable = GetWriteAvailable;
+}
+
+
+void PaUtil_InitializeStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation,
+ PaUtilStreamInterface *streamInterface,
+ PaStreamCallback *streamCallback,
+ void *userData )
+{
+ streamRepresentation->magic = PA_STREAM_MAGIC;
+ streamRepresentation->nextOpenStream = 0;
+ streamRepresentation->streamInterface = streamInterface;
+ streamRepresentation->streamCallback = streamCallback;
+ streamRepresentation->streamFinishedCallback = 0;
+
+ streamRepresentation->userData = userData;
+
+ streamRepresentation->streamInfo.inputLatency = 0.;
+ streamRepresentation->streamInfo.outputLatency = 0.;
+ streamRepresentation->streamInfo.sampleRate = 0.;
+}
+
+
+void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation )
+{
+ streamRepresentation->magic = 0;
+}
+
+
+PaError PaUtil_DummyRead( PaStream* stream,
+ void *buffer,
+ unsigned long frames )
+{
+ (void)stream; /* unused parameter */
+ (void)buffer; /* unused parameter */
+ (void)frames; /* unused parameter */
+
+ return paCanNotReadFromACallbackStream;
+}
+
+
+PaError PaUtil_DummyWrite( PaStream* stream,
+ const void *buffer,
+ unsigned long frames )
+{
+ (void)stream; /* unused parameter */
+ (void)buffer; /* unused parameter */
+ (void)frames; /* unused parameter */
+
+ return paCanNotWriteToACallbackStream;
+}
+
+
+signed long PaUtil_DummyGetReadAvailable( PaStream* stream )
+{
+ (void)stream; /* unused parameter */
+
+ return paCanNotReadFromACallbackStream;
+}
+
+
+signed long PaUtil_DummyGetWriteAvailable( PaStream* stream )
+{
+ (void)stream; /* unused parameter */
+
+ return paCanNotWriteToACallbackStream;
+}
+
+
+double PaUtil_DummyGetCpuLoad( PaStream* stream )
+{
+ (void)stream; /* unused parameter */
+
+ return 0.0;
+}
diff --git a/portaudio/pa_common/pa_stream.h b/portaudio/pa_common/pa_stream.h
new file mode 100644
index 0000000000000000000000000000000000000000..aaf89cf210c6f02367b1fbc57176c73a7d64b930
--- /dev/null
+++ b/portaudio/pa_common/pa_stream.h
@@ -0,0 +1,196 @@
+#ifndef PA_STREAM_H
+#define PA_STREAM_H
+/*
+ * $Id$
+ * Portable Audio I/O Library
+ * stream interface
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Interface used by pa_front to virtualize functions which operate on
+ streams.
+*/
+
+
+#include "portaudio.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+#define PA_STREAM_MAGIC (0x18273645)
+
+
+/** A structure representing an (abstract) interface to a host API. Contains
+ pointers to functions which implement the interface.
+
+ All PaStreamInterface functions are guaranteed to be called with a non-null,
+ valid stream parameter.
+*/
+typedef struct {
+ PaError (*Close)( PaStream* stream );
+ PaError (*Start)( PaStream *stream );
+ PaError (*Stop)( PaStream *stream );
+ PaError (*Abort)( PaStream *stream );
+ PaError (*IsStopped)( PaStream *stream );
+ PaError (*IsActive)( PaStream *stream );
+ PaTime (*GetTime)( PaStream *stream );
+ double (*GetCpuLoad)( PaStream* stream );
+ PaError (*Read)( PaStream* stream, void *buffer, unsigned long frames );
+ PaError (*Write)( PaStream* stream, const void *buffer, unsigned long frames );
+ signed long (*GetReadAvailable)( PaStream* stream );
+ signed long (*GetWriteAvailable)( PaStream* stream );
+} PaUtilStreamInterface;
+
+
+/** Initialize the fields of a PaUtilStreamInterface structure.
+*/
+void PaUtil_InitializeStreamInterface( PaUtilStreamInterface *streamInterface,
+ PaError (*Close)( PaStream* ),
+ PaError (*Start)( PaStream* ),
+ PaError (*Stop)( PaStream* ),
+ PaError (*Abort)( PaStream* ),
+ PaError (*IsStopped)( PaStream* ),
+ PaError (*IsActive)( PaStream* ),
+ PaTime (*GetTime)( PaStream* ),
+ double (*GetCpuLoad)( PaStream* ),
+ PaError (*Read)( PaStream* stream, void *buffer, unsigned long frames ),
+ PaError (*Write)( PaStream* stream, const void *buffer, unsigned long frames ),
+ signed long (*GetReadAvailable)( PaStream* stream ),
+ signed long (*GetWriteAvailable)( PaStream* stream ) );
+
+
+/** Dummy Read function for use in interfaces to a callback based streams.
+ Pass to the Read parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+PaError PaUtil_DummyRead( PaStream* stream,
+ void *buffer,
+ unsigned long frames );
+
+
+/** Dummy Write function for use in an interfaces to callback based streams.
+ Pass to the Write parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+PaError PaUtil_DummyWrite( PaStream* stream,
+ const void *buffer,
+ unsigned long frames );
+
+
+/** Dummy GetReadAvailable function for use in interfaces to callback based
+ streams. Pass to the GetReadAvailable parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+signed long PaUtil_DummyGetReadAvailable( PaStream* stream );
+
+
+/** Dummy GetWriteAvailable function for use in interfaces to callback based
+ streams. Pass to the GetWriteAvailable parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+signed long PaUtil_DummyGetWriteAvailable( PaStream* stream );
+
+
+
+/** Dummy GetCpuLoad function for use in an interface to a read/write stream.
+ Pass to the GetCpuLoad parameter of PaUtil_InitializeStreamInterface.
+ @return Returns 0.
+*/
+double PaUtil_DummyGetCpuLoad( PaStream* stream );
+
+
+/** Non host specific data for a stream. This data is used by pa_front to
+ forward to the appropriate functions in the streamInterface structure.
+*/
+typedef struct PaUtilStreamRepresentation {
+ unsigned long magic; /**< set to PA_STREAM_MAGIC */
+ struct PaUtilStreamRepresentation *nextOpenStream; /**< field used by multi-api code */
+ PaUtilStreamInterface *streamInterface;
+ PaStreamCallback *streamCallback;
+ PaStreamFinishedCallback *streamFinishedCallback;
+ void *userData;
+ PaStreamInfo streamInfo;
+} PaUtilStreamRepresentation;
+
+
+/** Initialize a PaUtilStreamRepresentation structure.
+
+ @see PaUtil_InitializeStreamRepresentation
+*/
+void PaUtil_InitializeStreamRepresentation(
+ PaUtilStreamRepresentation *streamRepresentation,
+ PaUtilStreamInterface *streamInterface,
+ PaStreamCallback *streamCallback,
+ void *userData );
+
+
+/** Clean up a PaUtilStreamRepresentation structure previously initialized
+ by a call to PaUtil_InitializeStreamRepresentation.
+
+ @see PaUtil_InitializeStreamRepresentation
+*/
+void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation );
+
+
+/** Check that the stream pointer is valid.
+
+ @return Returns paNoError if the stream pointer appears to be OK, otherwise
+ returns an error indicating the cause of failure.
+*/
+PaError PaUtil_ValidateStreamPointer( PaStream *stream );
+
+
+/** Cast an opaque stream pointer into a pointer to a PaUtilStreamRepresentation.
+
+ @see PaUtilStreamRepresentation
+*/
+#define PA_STREAM_REP( stream )\
+ ((PaUtilStreamRepresentation*) (stream) )
+
+
+/** Cast an opaque stream pointer into a pointer to a PaUtilStreamInterface.
+
+ @see PaUtilStreamRepresentation, PaUtilStreamInterface
+*/
+#define PA_STREAM_INTERFACE( stream )\
+ PA_STREAM_REP( (stream) )->streamInterface
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_STREAM_H */
diff --git a/portaudio/pa_common/pa_trace.c b/portaudio/pa_common/pa_trace.c
new file mode 100644
index 0000000000000000000000000000000000000000..6619d423af4a3106418d331cae8b74fcbc35280c
--- /dev/null
+++ b/portaudio/pa_common/pa_trace.c
@@ -0,0 +1,88 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library Trace Facility
+ * Store trace information in real-time for later printing.
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2000 Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Event trace mechanism for debugging.
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "pa_trace.h"
+
+#if PA_TRACE_REALTIME_EVENTS
+
+static char *traceTextArray[PA_MAX_TRACE_RECORDS];
+static int traceIntArray[PA_MAX_TRACE_RECORDS];
+static int traceIndex = 0;
+static int traceBlock = 0;
+
+/*********************************************************************/
+void PaUtil_ResetTraceMessages()
+{
+ traceIndex = 0;
+}
+
+/*********************************************************************/
+void PaUtil_DumpTraceMessages()
+{
+ int i;
+ int messageCount = (traceIndex < PA_MAX_TRACE_RECORDS) ? traceIndex : PA_MAX_TRACE_RECORDS;
+
+ printf("DumpTraceMessages: traceIndex = %d\n", traceIndex );
+ for( i=0; i<messageCount; i++ )
+ {
+ printf("%3d: %s = 0x%08X\n",
+ i, traceTextArray[i], traceIntArray[i] );
+ }
+ PaUtil_ResetTraceMessages();
+ fflush(stdout);
+}
+
+/*********************************************************************/
+void PaUtil_AddTraceMessage( const char *msg, int data )
+{
+ if( (traceIndex == PA_MAX_TRACE_RECORDS) && (traceBlock == 0) )
+ {
+ traceBlock = 1;
+ /* PaUtil_DumpTraceMessages(); */
+ }
+ else if( traceIndex < PA_MAX_TRACE_RECORDS )
+ {
+ traceTextArray[traceIndex] = msg;
+ traceIntArray[traceIndex] = data;
+ traceIndex++;
+ }
+}
+
+#endif /* TRACE_REALTIME_EVENTS */
diff --git a/portaudio/pa_common/pa_trace.h b/portaudio/pa_common/pa_trace.h
new file mode 100644
index 0000000000000000000000000000000000000000..256c3e6911bf887d76b5a36d9ed9a972ab34f81f
--- /dev/null
+++ b/portaudio/pa_common/pa_trace.h
@@ -0,0 +1,70 @@
+#ifndef PA_TRACE_H
+#define PA_TRACE_H
+/*
+ * $Id$
+ * Portable Audio I/O Library Trace Facility
+ * Store trace information in real-time for later printing.
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2000 Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Event trace mechanism for debugging.
+
+ Allows data to be written to the buffer at interrupt time and dumped later.
+*/
+
+
+#define PA_TRACE_REALTIME_EVENTS (0) /* Keep log of various real-time events. */
+#define PA_MAX_TRACE_RECORDS (2048)
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+#if PA_TRACE_REALTIME_EVENTS
+
+void PaUtil_ResetTraceMessages();
+void PaUtil_AddTraceMessage( const char *msg, int data );
+void PaUtil_DumpTraceMessages();
+
+#else
+
+#define PaUtil_ResetTraceMessages() /* noop */
+#define PaUtil_AddTraceMessage(msg,data) /* noop */
+#define PaUtil_DumpTraceMessages() /* noop */
+
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* PA_TRACE_H */
diff --git a/portaudio/pa_common/pa_types.h b/portaudio/pa_common/pa_types.h
new file mode 100644
index 0000000000000000000000000000000000000000..343dc8cf8a69284ef906fe62c7e76f7a3eb8fb35
--- /dev/null
+++ b/portaudio/pa_common/pa_types.h
@@ -0,0 +1,65 @@
+#ifndef PA_TYPES_H
+#define PA_TYPES_H
+
+/*
+ SIZEOF_SHORT, SIZEOF_INT and SIZEOF_LONG are set by the configure script
+ when it is used. Otherwise we default to the common 32 bit values, if your
+ platform doesn't use configure, and doesn't use the default values below
+ you will need to explicitly define these symbols in your make file.
+
+ A PA_VALIDATE_SIZES macro is provided to assert that the values set in this
+ file are correct.
+*/
+
+#ifndef SIZEOF_SHORT
+#define SIZEOF_SHORT 2
+#endif
+
+#ifndef SIZEOF_INT
+#define SIZEOF_INT 4
+#endif
+
+#ifndef SIZEOF_LONG
+#define SIZEOF_LONG 4
+#endif
+
+
+#if SIZEOF_SHORT == 2
+typedef signed short PaInt16;
+typedef unsigned short PaUint16;
+#elif SIZEOF_INT == 2
+typedef signed int PaInt16;
+typedef unsigned int PaUint16;
+#else
+#error pa_types.h was unable to determine which type to use for 16bit integers on the target platform
+#endif
+
+#if SIZEOF_SHORT == 4
+typedef signed short PaInt32;
+typedef unsigned short PaUint32;
+#elif SIZEOF_INT == 4
+typedef signed int PaInt32;
+typedef unsigned int PaUint32;
+#elif SIZEOF_LONG == 4
+typedef signed long PaInt32;
+typedef unsigned long PaUint32;
+#else
+#error pa_types.h was unable to determine which type to use for 32bit integers on the target platform
+#endif
+
+
+/* PA_VALIDATE_TYPE_SIZES compares the size of the integer types at runtime to
+ ensure that PortAudio was configured correctly, and raises an assertion if
+ they don't match the expected values. <assert.h> must be included in the
+ context in which this macro is used.
+*/
+#define PA_VALIDATE_TYPE_SIZES \
+ { \
+ assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaUint16 ) == 2 ); \
+ assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaInt16 ) == 2 ); \
+ assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaUint32 ) == 4 ); \
+ assert( "PortAudio: type sizes are not correct in pa_types.h" && sizeof( PaInt32 ) == 4 ); \
+ }
+
+
+#endif /* PA_TYPES_H */
diff --git a/portaudio/pa_common/pa_util.h b/portaudio/pa_common/pa_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..4d060d814a7f95891c45e5eb5b251e25af230109
--- /dev/null
+++ b/portaudio/pa_common/pa_util.h
@@ -0,0 +1,167 @@
+#ifndef PA_UTIL_H
+#define PA_UTIL_H
+/*
+ * $Id$
+ * Portable Audio I/O Library implementation utilities header
+ * common implementation utilities and interfaces
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief Prototypes for utility functions used by PortAudio implementations.
+
+ @todo Document and adhere to the alignment guarantees provided by
+ PaUtil_AllocateMemory().
+*/
+
+
+#include "portaudio.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+struct PaUtilHostApiRepresentation;
+
+
+/** Retrieve a specific host API representation. This function can be used
+ by implementations to retrieve a pointer to their representation in
+ host api specific extension functions which aren't passed a rep pointer
+ by pa_front.c.
+
+ @param hostApi A pointer to a host API represenation pointer. Apon success
+ this will receive the requested representation pointer.
+
+ @param type A valid host API type identifier.
+
+ @returns An error code. If the result is PaNoError then a pointer to the
+ requested host API representation will be stored in *hostApi. If the host API
+ specified by type is not found, this function returns paHostApiNotFound.
+*/
+PaError PaUtil_GetHostApiRepresentation( struct PaUtilHostApiRepresentation **hostApi,
+ PaHostApiTypeId type );
+
+
+/** Convert a PortAudio device index into a host API specific device index.
+ @param hostApiDevice Pointer to a device index, on success this will recieve the
+ converted device index value.
+ @param device The PortAudio device index to convert.
+ @param hostApi The host api which the index should be converted for.
+
+ @returns On success returns PaNoError and places the converted index in the
+ hostApiDevice parameter.
+*/
+PaError PaUtil_DeviceIndexToHostApiDeviceIndex(
+ PaDeviceIndex *hostApiDevice, PaDeviceIndex device,
+ struct PaUtilHostApiRepresentation *hostApi );
+
+
+/** Set the host error information returned by Pa_GetLastHostErrorInfo. This
+ function and the paUnanticipatedHostError error code should be used as a
+ last resort. Implementors should use existing PA error codes where possible,
+ or nominate new ones. Note that at it is always better to use
+ PaUtil_SetLastHostErrorInfo() and paUnanticipatedHostError than to return an
+ ambiguous or inaccurate PaError code.
+
+ @param hostApiType The host API which encountered the error (ie of the caller)
+
+ @param errorCode The error code returned by the native API function.
+
+ @param errorText A string describing the error. PaUtil_SetLastHostErrorInfo
+ makes a copy of the string, so it is not necessary for the pointer to remain
+ valid after the call to PaUtil_SetLastHostErrorInfo() returns.
+
+*/
+void PaUtil_SetLastHostErrorInfo( PaHostApiTypeId hostApiType, long errorCode,
+ const char *errorText );
+
+
+
+/** PA_DEBUG() provides a simple debug message printing facility. The macro
+ passes it's argument to a printf-like function called PaUtil_DebugPrint()
+ which prints to stderr and always flushes the stream after printing.
+ Because preprocessor macros cannot directly accept variable length argument
+ lists, calls to the macro must include an additional set of parenthesis, eg:
+ PA_DEBUG(("errorno: %d", 1001 ));
+*/
+
+void PaUtil_DebugPrint( const char *format, ... );
+
+#if (0) /* set to 1 to print debug messages */
+#define PA_DEBUG(x) PaUtil_DebugPrint x ;
+#else
+#define PA_DEBUG(x)
+#endif
+
+
+/* the following functions are implemented in a platform platform specific
+ .c file
+*/
+
+/** Allocate size bytes, guaranteed to be aligned to a FIXME byte boundary */
+void *PaUtil_AllocateMemory( long size );
+
+
+/** Realease block if non-NULL. block may be NULL */
+void PaUtil_FreeMemory( void *block );
+
+
+/** Return the number of currently allocated blocks. This function can be
+ used for detecting memory leaks.
+
+ @note Allocations will only be tracked if PA_TRACK_MEMORY is #defined. If
+ it isn't, this function will always return 0.
+*/
+int PaUtil_CountCurrentlyAllocatedBlocks( void );
+
+
+/** Initialize the clock used by PaUtil_GetTime(). Call this before calling
+ PaUtil_GetTime.
+
+ @see PaUtil_GetTime
+*/
+void PaUtil_InitializeClock( void );
+
+
+/** Return the system time in seconds. Used to implement CPU load functions
+
+ @see PaUtil_InitializeClock
+*/
+double PaUtil_GetTime( void );
+
+
+/* void Pa_Sleep( long msec ); must also be implemented in per-platform .c file */
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_UTIL_H */
diff --git a/portaudio/pa_common/portaudio.h b/portaudio/pa_common/portaudio.h
new file mode 100644
index 0000000000000000000000000000000000000000..ac071d7eac66743eb495fdeb69a25d0195ec784d
--- /dev/null
+++ b/portaudio/pa_common/portaudio.h
@@ -0,0 +1,1123 @@
+
+#ifndef PORTAUDIO_H
+#define PORTAUDIO_H
+/*
+ * $Id$
+ * PortAudio Portable Real-Time Audio Library
+ * PortAudio API Header File
+ * Latest version available at: http://www.portaudio.com/
+ *
+ * Copyright (c) 1999-2002 Ross Bencina and Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/** @file
+ @brief The PortAudio API.
+*/
+
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+/** Retrieve the release number of the currently running PortAudio build,
+ eg 1900.
+*/
+int Pa_GetVersion( void );
+
+
+/** Retrieve a textual description of the current PortAudio build,
+ eg "PortAudio V19-devel 13 October 2002".
+*/
+const char* Pa_GetVersionText( void );
+
+
+/** Error codes returned by PortAudio functions.
+ Note that with the exception of paNoError, all PaErrorCodes are negative.
+*/
+
+typedef int PaError;
+typedef enum PaErrorCode
+{
+ paNoError = 0,
+
+ paNotInitialized = -10000,
+ paUnanticipatedHostError,
+ paInvalidChannelCount,
+ paInvalidSampleRate,
+ paInvalidDevice,
+ paInvalidFlag,
+ paSampleFormatNotSupported,
+ paBadIODeviceCombination,
+ paInsufficientMemory,
+ paBufferTooBig,
+ paBufferTooSmall,
+ paNullCallback,
+ paBadStreamPtr,
+ paTimedOut,
+ paInternalError,
+ paDeviceUnavailable,
+ paIncompatibleHostApiSpecificStreamInfo,
+ paStreamIsStopped,
+ paStreamIsNotStopped,
+ paInputOverflowed,
+ paOutputUnderflowed,
+ paHostApiNotFound,
+ paInvalidHostApi,
+ paCanNotReadFromACallbackStream, /**< @todo review error code name */
+ paCanNotWriteToACallbackStream, /**< @todo review error code name */
+ paCanNotReadFromAnOutputOnlyStream, /**< @todo review error code name */
+ paCanNotWriteToAnInputOnlyStream, /**< @todo review error code name */
+ paIncompatibleStreamHostApi
+} PaErrorCode;
+
+
+/** Translate the supplied PortAudio error code into a human readable
+ message.
+*/
+const char *Pa_GetErrorText( PaError errorCode );
+
+
+/** Library initialization function - call this before using PortAudio.
+ This function initialises internal data structures and prepares underlying
+ host APIs for use. This function MUST be called before using any other
+ PortAudio API functions.
+
+ If Pa_Initialize() is called multiple times, each successful
+ call must be matched with a corresponding call to Pa_Terminate().
+ Pairs of calls to Pa_Initialize()/Pa_Terminate() may overlap, and are not
+ required to be fully nested.
+
+ Note that if Pa_Initialize() returns an error code, Pa_Terminate() should
+ NOT be called.
+
+ @return paNoError if successful, otherwise an error code indicating the cause
+ of failure.
+
+ @see Pa_Terminate
+*/
+PaError Pa_Initialize( void );
+
+
+/** Library termination function - call this when finished using PortAudio.
+ This function deallocates all resources allocated by PortAudio since it was
+ initializied by a call to Pa_Initialize(). In cases where Pa_Initialise() has
+ been called multiple times, each call must be matched with a corresponding call
+ to Pa_Terminate(). The final matching call to Pa_Terminate() will automatically
+ close any PortAudio streams that are still open.
+
+ Pa_Terminate() MUST be called before exiting a program which uses PortAudio.
+ Failure to do so may result in serious resource leaks, such as audio devices
+ not being available until the next reboot.
+
+ @return paNoError if successful, otherwise an error code indicating the cause
+ of failure.
+
+ @see Pa_Initialize
+*/
+PaError Pa_Terminate( void );
+
+
+
+/** The type used to refer to audio devices. Values of this type usually
+ range from 0 to (Pa_DeviceCount-1), and may also take on the PaNoDevice
+ and paUseHostApiSpecificDeviceSpecification values.
+
+ @see Pa_DeviceCount, paNoDevice, paUseHostApiSpecificDeviceSpecification
+*/
+typedef int PaDeviceIndex;
+
+
+/** A special PaDeviceIndex value indicating that no device is available,
+ or should be used.
+
+ @see PaDeviceIndex
+*/
+#define paNoDevice ((PaDeviceIndex)-1)
+
+
+/** A special PaDeviceIndex value indicating that the device(s) to be used
+ are specified in the host api specific stream info structure.
+
+ @see PaDeviceIndex
+*/
+#define paUseHostApiSpecificDeviceSpecification ((PaDeviceIndex)-2)
+
+
+/* Host API enumeration mechanism */
+
+/** The type used to enumerate to host APIs at runtime. Values of this type
+ range from 0 to (Pa_GetHostApiCount()-1).
+
+ @see Pa_GetHostApiCount
+*/
+typedef int PaHostApiIndex;
+
+
+/** Retrieve the number of available host APIs. Even if a host API is
+ available it may have no devices available.
+
+ @return A non-negative value indicating the number of available host APIs
+ or, a PaErrorCode (which are always negative) if PortAudio is not initialized
+ or an error is encountered.
+
+ @see PaHostApiIndex
+*/
+PaHostApiIndex Pa_GetHostApiCount( void );
+
+
+/** Retrieve the index of the default host API. The default host API will be
+ the lowest common denominator host API on the current platform and is
+ unlikely to provide the best performance.
+
+ @return A non-negative value ranging from 0 to (Pa_GetHostApiCount()-1)
+ indicating the default host API index or, a PaErrorCode (which are always
+ negative) if PortAudio is not initialized or an error is encountered.
+*/
+PaHostApiIndex Pa_GetDefaultHostApi( void );
+
+
+/** Unchanging unique identifiers for each supported host API. This type
+ is used in the PaHostApiInfo structure. The values are guaranteed to be
+ unique and to never change, thus allowing code to be written that
+ conditionally uses host API specific extensions.
+
+ New type ids will be allocated when support for a host API reaches
+ "public alpha" status, prior to that developers should use the
+ paInDevelopment type id.
+
+ @see PaHostApiInfo
+*/
+typedef enum PaHostApiTypeId
+{
+ paInDevelopment=0, /* use while developing support for a new host API */
+ paDirectSound=1,
+ paMME=2,
+ paASIO=3,
+ paSoundManager=4,
+ paCoreAudio=5,
+ paOSS=7,
+ paALSA=8,
+ paAL=9,
+ paBeOS=10,
+ paWDMKS=11,
+ paJACK=12
+} PaHostApiTypeId;
+
+
+/** A structure containing information about a particular host API. */
+
+typedef struct PaHostApiInfo
+{
+ /** this is struct version 1 */
+ int structVersion;
+ /** The well known unique identifier of this host API @see PaHostApiTypeId */
+ PaHostApiTypeId type;
+ /** A textual description of the host API for display on user interfaces. */
+ const char *name;
+
+ /** The number of devices belonging to this host API. This field may be
+ used in conjunction with Pa_HostApiDeviceIndexToDeviceIndex() to enumerate
+ all devices for this host API.
+ @see Pa_HostApiDeviceIndexToDeviceIndex
+ */
+ int deviceCount;
+
+ /** The the default input device for this host API. The value will be a
+ device index ranging from 0 to (Pa_GetDeviceCount()-1), or paNoDevice
+ if no default input device is available.
+ */
+ PaDeviceIndex defaultInputDevice;
+
+ /** The the default output device for this host API. The value will be a
+ device index ranging from 0 to (Pa_GetDeviceCount()-1), or paNoDevice
+ if no default output device is available.
+ */
+ PaDeviceIndex defaultOutputDevice;
+
+} PaHostApiInfo;
+
+
+/** Retrieve a pointer to a structure containing information about a specific
+ host Api.
+
+ @param hostApi A valid host API index ranging from 0 to (Pa_GetHostApiCount()-1)
+
+ @return A pointer to an immutable PaHostApiInfo structure describing
+ a specific host API. If the hostApi parameter is out of range or an error
+ is encountered, the function returns NULL.
+
+ The returned structure is owned by the PortAudio implementation and must not
+ be manipulated or freed. The pointer is only guaranteed to be valid between
+ calls to Pa_Initialize() and Pa_Terminate().
+*/
+const PaHostApiInfo * Pa_GetHostApiInfo( PaHostApiIndex hostApi );
+
+
+/** Convert a static host API unique identifier, into a runtime
+ host API index.
+
+ @param type A unique host API identifier belonging to the PaHostApiTypeId
+ enumeration.
+
+ @return A valid PaHostApiIndex ranging from 0 to (Pa_GetHostApiCount()-1) or,
+ a PaErrorCode (which are always negative) if PortAudio is not initialized
+ or an error is encountered.
+
+ The paHostApiNotFound error code indicates that the host API specified by the
+ type parameter is not available.
+
+ @see PaHostApiTypeId
+*/
+PaHostApiIndex Pa_HostApiTypeIdToHostApiIndex( PaHostApiTypeId type );
+
+
+/** Convert a host-API-specific device index to standard PortAudio device index.
+ This function may be used in conjunction with the deviceCount field of
+ PaHostApiInfo to enumerate all devices for the specified host API.
+
+ @param hostApi A valid host API index ranging from 0 to (Pa_GetHostApiCount()-1)
+
+ @param hostApiDeviceIndex A valid per-host device index in the range
+ 0 to (Pa_GetHostApiInfo(hostApi)->deviceCount-1)
+
+ @return A non-negative PaDeviceIndex ranging from 0 to (Pa_GetDeviceCount()-1)
+ or, a PaErrorCode (which are always negative) if PortAudio is not initialized
+ or an error is encountered.
+
+ A paInvalidHostApi error code indicates that the host API index specified by
+ the hostApi parameter is out of range.
+
+ A paInvalidDevice error code indicates that the hostApiDeviceIndex parameter
+ is out of range.
+
+ @see PaHostApiInfo
+*/
+PaDeviceIndex Pa_HostApiDeviceIndexToDeviceIndex( PaHostApiIndex hostApi,
+ int hostApiDeviceIndex );
+
+
+
+/** Structure used to return information about a host error condition.
+*/
+typedef struct PaHostErrorInfo{
+ PaHostApiTypeId hostApiType; /**< the host API which returned the error code */
+ long errorCode; /**< the error code returned */
+ const char *errorText; /**< a textual description of the error if available, otherwise a zero-length string */
+}PaHostErrorInfo;
+
+
+/** Return information about the last host error encountered. The error
+ information returned by Pa_GetLastHostErrorInfo() will never be modified
+ asyncronously by errors occurring in other PortAudio owned threads
+ (such as the thread that manages the stream callback.)
+
+ This function is provided as a last resort, primarily to enhance debugging
+ by providing clients with access to all available error information.
+
+ @return A pointer to an immutable structure constaining information about
+ the host error. The values in this structure will only be valid if a
+ PortAudio function has previously returned the paUnanticipatedHostError
+ error code.
+*/
+const PaHostErrorInfo* Pa_GetLastHostErrorInfo( void );
+
+
+
+/* Device enumeration and capabilities */
+
+/** Retrieve the number of available devices. The number of available devices
+ may be zero.
+
+ @return A non-negative value indicating the number of available devices or,
+ a PaErrorCode (which are always negative) if PortAudio is not initialized
+ or an error is encountered.
+*/
+PaDeviceIndex Pa_GetDeviceCount( void );
+
+
+/** Retrieve the index of the default input device. The result can be
+ used in the inputDevice parameter to Pa_OpenStream().
+
+ @return The default input device index for the default host API, or paNoDevice
+ if no default input device is available or an error was encountered.
+*/
+PaDeviceIndex Pa_GetDefaultInputDevice( void );
+
+
+/** Retrieve the index of the default output device. The result can be
+ used in the outputDevice parameter to Pa_OpenStream().
+
+ @return The default output device index for the defualt host API, or paNoDevice
+ if no default output device is available or an error was encountered.
+
+ @note
+ On the PC, the user can specify a default device by
+ setting an environment variable. For example, to use device #1.
+<pre>
+ set PA_RECOMMENDED_OUTPUT_DEVICE=1
+</pre>
+ The user should first determine the available device ids by using
+ the supplied application "pa_devs".
+*/
+PaDeviceIndex Pa_GetDefaultOutputDevice( void );
+
+
+/** The type used to represent monotonic time in seconds that can be used
+ for syncronisation. The type is used for the outTime argument to the
+ PaStreamCallback and as the result of Pa_GetStreamTime().
+
+ @see PaStreamCallback, Pa_GetStreamTime
+*/
+typedef double PaTime;
+
+
+/** A type used to specify one or more sample formats. Each value indicates
+ a possible format for sound data passed to and from the stream callback,
+ Pa_ReadStream and Pa_WriteStream.
+
+ The standard formats paFloat32, paInt16, paInt32, paInt24, paInt8
+ and aUInt8 are usually implemented by all implementations.
+
+ The floating point representation (paFloat32) uses +1.0 and -1.0 as the
+ maximum and minimum respectively.
+
+ paUInt8 is an unsigned 8 bit format where 128 is considered "ground"
+
+ The paNonInterleaved flag indicates that a multichannel buffer is passed
+ as a set of non-interleaved pointers.
+
+ @see Pa_OpenStream, Pa_OpenDefaultStream, PaDeviceInfo
+ @see paFloat32, paInt16, paInt32, paInt24, paInt8
+ @see paUInt8, paCustomFormat, paNonInterleaved
+*/
+typedef unsigned long PaSampleFormat;
+
+
+#define paFloat32 ((PaSampleFormat) 0x00000001) /**< @see PaSampleFormat */
+#define paInt32 ((PaSampleFormat) 0x00000002) /**< @see PaSampleFormat */
+#define paInt24 ((PaSampleFormat) 0x00000004) /**< Packed 24 bit format. @see PaSampleFormat */
+#define paInt16 ((PaSampleFormat) 0x00000008) /**< @see PaSampleFormat */
+#define paInt8 ((PaSampleFormat) 0x00000010) /**< @see PaSampleFormat */
+#define paUInt8 ((PaSampleFormat) 0x00000020) /**< @see PaSampleFormat */
+#define paCustomFormat ((PaSampleFormat) 0x00010000)/**< @see PaSampleFormat */
+
+#define paNonInterleaved ((PaSampleFormat) 0x80000000)
+
+/** A structure providing information and capabilities of PortAudio devices.
+ Devices may support input, output or both input and output.
+*/
+typedef struct PaDeviceInfo
+{
+ int structVersion; /* this is struct version 2 */
+ const char *name;
+ PaHostApiIndex hostApi; /* note this is a host API index, not a type id*/
+
+ int maxInputChannels;
+ int maxOutputChannels;
+
+ /* Default latency values for interactive performance. */
+ PaTime defaultLowInputLatency;
+ PaTime defaultLowOutputLatency;
+ /* Default latency values for robust non-interactive applications (eg. playing sound files). */
+ PaTime defaultHighInputLatency;
+ PaTime defaultHighOutputLatency;
+
+ double defaultSampleRate;
+} PaDeviceInfo;
+
+
+/** Retrieve a pointer to a PaDeviceInfo structure containing information
+ about the specified device.
+ @return A pointer to an immutable PaDeviceInfo structure. If the device
+ parameter is out of range the function returns NULL.
+
+ @param device A valid device index in the range 0 to (Pa_GetDeviceCount()-1)
+
+ @note PortAudio manages the memory referenced by the returned pointer,
+ the client must not manipulate or free the memory. The pointer is only
+ guaranteed to be valid between calls to Pa_Initialize() and Pa_Terminate().
+
+ @see PaDeviceInfo, PaDeviceIndex
+*/
+const PaDeviceInfo* Pa_GetDeviceInfo( PaDeviceIndex device );
+
+
+/** Parameters for one direction (input or output) of a stream.
+*/
+typedef struct PaStreamParameters
+{
+ /** A valid device index in the range 0 to (Pa_GetDeviceCount()-1)
+ specifying the device to be used or the special constant
+ paUseHostApiSpecificDeviceSpecification which indicates that the actual
+ device(s) to use are specified in hostApiSpecificStreamInfo.
+ This field must not be set to paNoDevice.
+ */
+ PaDeviceIndex device;
+
+ /** The number of channels of sound to be delivered to the
+ stream callback or accessed by Pa_ReadStream() or Pa_WriteStream().
+ It can range from 1 to the value of maxInputChannels in the
+ PaDeviceInfo record for the device specified by the device parameter.
+ */
+ int channelCount;
+
+ /** The sample format of the buffer provided to the stream callback,
+ a_ReadStream() or Pa_WriteStream(). It may be any of the formats described
+ by the PaSampleFormat enumeration.
+ */
+ PaSampleFormat sampleFormat;
+
+ /** The desired latency in seconds. Where practical, implementations should
+ configure their latency based on these parameters, otherwise they may
+ choose the closest viable latency instead. Unless the suggested latency
+ is greater than the absolute upper limit for the device implementations
+ shouldround the suggestedLatency up to the next practial value - ie to
+ provide an equal or higher latency than suggestedLatency whereever possibe.
+ Actual latency values for an open stream may be retrieved using the
+ inputLatency and outputLatency fields of the PaStreamInfo structure
+ returned by Pa_GetStreamInfo().
+ @see default*Latency in PaDeviceInfo, *Latency in PaStreamInfo
+ */
+ PaTime suggestedLatency;
+
+ /** An optional pointer to a host api specific data structure
+ containing additional information for device setup and/or stream processing.
+ hostApiSpecificStreamInfo is never required for correct operation,
+ if not used it should be set to NULL.
+ */
+ void *hostApiSpecificStreamInfo;
+
+} PaStreamParameters;
+
+
+/** Return code for Pa_IsFormatSupported indicating success. */
+#define paFormatIsSupported (0)
+
+/** Determine whether it would be possible to open a stream with the specified
+ parameters.
+
+ @param inputParameters A structure that describes the input parameters used to
+ open a stream. The suggestedLatency field is ignored. See PaStreamParameters
+ for a description of these parameters. inputParameters must be NULL for
+ output-only streams.
+
+ @param outputParameters A structure that describes the output parameters used
+ to open a stream. The suggestedLatency field is ignored. See PaStreamParameters
+ for a description of these parameters. outputParameters must be NULL for
+ input-only streams.
+
+ @param sampleRate The required sampleRate. For full-duplex streams it is the
+ sample rate for both input and output
+
+ @return Returns 0 if the format is supported, and an error code indicating why
+ the format is not supported otherwise. The constant paFormatIsSupported is
+ provided to compare with the return value for success.
+
+ @see paFormatIsSupported, PaStreamParameters
+*/
+PaError Pa_IsFormatSupported( const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate );
+
+
+
+/* Streaming types and functions */
+
+
+/**
+ A single PaStream can provide multiple channels of real-time
+ streaming audio input and output to a client application. A stream
+ provides access to audio hardware represented by one or more
+ PaDevices. Depending on the underlying Host API, it may be possible
+ to open multiple streams using the same device, however this behavior
+ is implementation defined. Portable applications should assume that
+ a PaDevice may be simultaneously used by at most one PaStream.
+
+ Pointers to PaStream objects are passed between PortAudio functions that
+ operate on streams.
+
+ @see Pa_OpenStream, Pa_OpenDefaultStream, Pa_OpenDefaultStream, Pa_CloseStream,
+ Pa_StartStream, Pa_StopStream, Pa_AbortStream, Pa_IsStreamActive,
+ Pa_GetStreamTime, Pa_GetStreamCpuLoad
+
+*/
+typedef void PaStream;
+
+
+/** Can be passed as the framesPerBuffer parameter to Pa_OpenStream()
+ or Pa_OpenDefaultStream() to indicate that the stream callback will
+ accept buffers of any size.
+*/
+#define paFramesPerBufferUnspecified (0)
+
+
+/** Flags used to control the behavior of a stream. They are passed as
+ parameters to Pa_OpenStream or Pa_OpenDefaultStream. Multiple flags may be
+ ORed together.
+
+ @see Pa_OpenStream, Pa_OpenDefaultStream
+ @see paNoFlag, paClipOff, paDitherOff, paNeverDropInput,
+ paPrimeOutputBuffersUsingStreamCallback, paPlatformSpecificFlags
+*/
+typedef unsigned long PaStreamFlags;
+
+/** @see PaStreamFlags */
+#define paNoFlag ((PaStreamFlags) 0)
+
+/** Disable default clipping of out of range samples.
+ @see PaStreamFlags
+*/
+#define paClipOff ((PaStreamFlags) 0x00000001)
+
+/** Disable default dithering.
+ @see PaStreamFlags
+*/
+#define paDitherOff ((PaStreamFlags) 0x00000002)
+
+/** Flag requests that where possible a full duplex stream will not discard
+ overflowed input samples without calling the stream callback. This flag is
+ only valid for full duplex callback streams and only when used in combination
+ with the paFramesPerBufferUnspecified (0) framesPerBuffer parameter. Using
+ this flag incorrectly results in a paInvalidFlag error being returned from
+ Pa_OpenStream and Pa_OpenDefaultStream.
+
+ @see PaStreamFlags, paFramesPerBufferUnspecified
+*/
+#define paNeverDropInput ((PaStreamFlags) 0x00000004)
+
+/** Call the stream callback to fill initial output buffers, rather than the
+ default behavior of priming the buffers with zeros (silence). This flag has
+ no effect for input-only and blocking read/write streams.
+
+ @see PaStreamFlags
+*/
+#define paPrimeOutputBuffersUsingStreamCallback ((PaStreamFlags) 0x00000008)
+
+/** A mask specifying the platform specific bits.
+ @see PaStreamFlags
+*/
+#define paPlatformSpecificFlags ((PaStreamFlags)0xFFFF0000)
+
+/**
+ Timing information for the buffers passed to the stream callback.
+*/
+typedef struct PaStreamCallbackTimeInfo{
+ PaTime inputBufferAdcTime;
+ PaTime currentTime;
+ PaTime outputBufferDacTime;
+} PaStreamCallbackTimeInfo;
+
+
+/**
+ Flag bit constants for the statusFlags to PaStreamCallback.
+
+ @see paInputUnderflow, paInputOverflow, paOutputUnderflow, paOutputOverflow,
+ paPrimingOutput
+*/
+typedef unsigned long PaStreamCallbackFlags;
+
+/** In a stream opened with paFramesPerBufferUnspecified, indicates that
+ input data is all silence (zeros) because no real data is available. In a
+ stream opened without paFramesPerBufferUnspecified, it indicates that one or
+ more zero samples have been inserted into the input buffer to compensate
+ for an input underflow.
+ @see PaStreamCallbackFlags
+*/
+#define paInputUnderflow ((PaStreamCallbackFlags) 0x00000001)
+
+/** In a stream opened with paFramesPerBufferUnspecified, indicates that data
+ prior to the first sample of the input buffer was discarded due to an
+ overflow, possibly because the stream callback is using too much CPU time.
+ Otherwise indicates that data prior to one or more samples in the
+ input buffer was discarded.
+ @see PaStreamCallbackFlags
+*/
+#define paInputOverflow ((PaStreamCallbackFlags) 0x00000002)
+
+/** Indicates that output data (or a gap) was inserted, possibly because the
+ stream callback is using too much CPU time.
+ @see PaStreamCallbackFlags
+*/
+#define paOutputUnderflow ((PaStreamCallbackFlags) 0x00000004)
+
+/** Indicates that output data will be discarded because no room is available.
+ @see PaStreamCallbackFlags
+*/
+#define paOutputOverflow ((PaStreamCallbackFlags) 0x00000008)
+
+/** Some of all of the output data will be used to prime the stream, input
+ data may be zero.
+ @see PaStreamCallbackFlags
+*/
+#define paPrimingOutput ((PaStreamCallbackFlags) 0x00000010)
+
+/**
+ Allowable return values for the PaStreamCallback.
+ @see PaStreamCallback
+*/
+typedef enum PaStreamCallbackResult
+{
+ paContinue=0,
+ paComplete=1,
+ paAbort=2
+} PaStreamCallbackResult;
+
+
+/**
+ Functions of type PaStreamCallback are implemented by PortAudio clients.
+ They consume, process or generate audio in response to requests from an
+ active PortAudio stream.
+
+ @param input and @param output are arrays of interleaved samples,
+ the format, packing and number of channels used by the buffers are
+ determined by parameters to Pa_OpenStream().
+
+ @param frameCount The number of sample frames to be processed by
+ the stream callback.
+
+ @param timeInfo The time in seconds when the first sample of the input
+ buffer was received at the audio input, the time in seconds when the first
+ sample of the output buffer will begin being played at the audio output, and
+ the time in seconds when the stream callback was called.
+ See also Pa_GetStreamTime()
+
+ @param statusFlags Flags indicating whether input and/or output buffers
+ have been inserted or will be dropped to overcome underflow or overflow
+ conditions.
+
+ @param userData The value of a user supplied pointer passed to
+ Pa_OpenStream() intended for storing synthesis data etc.
+
+ @return
+ The stream callback should return one of the values in the
+ PaStreamCallbackResult enumeration. To ensure that the callback continues
+ to be called, it should return paContinue (0). Either paComplete or paAbort
+ can be returned to finish stream processing, after either of these values is
+ returned the callback will not be called again. If paAbort is returned the
+ stream will finish as soon as possible. If paComplete is returned, the stream
+ will continue until all buffers generated by the callback have been played.
+ This may be useful in applications such as soundfile players where a specific
+ duration of output is required. However, it is not necessary to utilise this
+ mechanism as Pa_StopStream(), Pa_AbortStream() or Pa_CloseStream() can also
+ be used to stop the stream. The callback must always fill the entire output
+ buffer irrespective of its return value.
+
+ @see Pa_OpenStream, Pa_OpenDefaultStream
+
+ @note With the exception of Pa_GetStreamCpuLoad() it is not permissable to call
+ PortAudio API functions from within the stream callback.
+*/
+typedef int PaStreamCallback(
+ const void *input, void *output,
+ unsigned long frameCount,
+ const PaStreamCallbackTimeInfo* timeInfo,
+ PaStreamCallbackFlags statusFlags,
+ void *userData );
+
+
+/** Opens a stream for either input, output or both.
+
+ @param stream The address of a PaStream pointer which will receive
+ a pointer to the newly opened stream.
+
+ @param inputParameters A structure that describes the input parameters used by
+ the opened stream. See PaStreamParameters for a description of these parameters.
+ inputParameters must be NULL for output-only streams.
+
+ @param outputParameters A structure that describes the output parameters used by
+ the opened stream. See PaStreamParameters for a description of these parameters.
+ outputParameters must be NULL for input-only streams.
+
+ @param sampleRate The desired sampleRate. For full-duplex streams it is the
+ sample rate for both input and output
+
+ @param framesPerBuffer The number of frames passed to the stream callback
+ function, or the preferred block granularity for a blocking read/write stream.
+ The special value paFramesPerBufferUnspecified (0) may be used to request that
+ the stream callback will recieve an optimal (and possibly varying) number of
+ frames based on host requirements and the requested latency settings.
+ Note: With some host APIs, the use of non-zero framesPerBuffer for a callback
+ stream may introduce an additional layer of buffering which could introduce
+ additional latency. PortAudio guarantees that the additional latency
+ will be kept to the theoretical minimum however, it is strongly recommended
+ that a non-zero framesPerBuffer value only be used when your algorithm
+ requires a fixed number of frames per stream callback.
+
+ @param streamFlags Flags which modify the behaviour of the streaming process.
+ This parameter may contain a combination of flags ORed together. Some flags may
+ only be relevant to certain buffer formats.
+
+ @param streamCallback A pointer to a client supplied function that is responsible
+ for processing and filling input and output buffers. If this parameter is NULL
+ the stream will be opened in 'blocking read/write' mode. In blocking mode,
+ the client can receive sample data using Pa_ReadStream and write sample data
+ using Pa_WriteStream, the number of samples that may be read or written
+ without blocking is returned by Pa_GetStreamReadAvailable and
+ Pa_GetStreamWriteAvailable respectively.
+
+ @param userData A client supplied pointer which is passed to the stream callback
+ function. It could for example, contain a pointer to instance data necessary
+ for processing the audio buffers. This parameter is ignored if streamCallback
+ is NULL.
+
+ @return
+ Upon success Pa_OpenStream() returns paNoError and places a pointer to a
+ valid PaStream in the stream argument. The stream is inactive (stopped).
+ If a call to Pa_OpenStream() fails, a non-zero error code is returned (see
+ PaError for possible error codes) and the value of stream is invalid.
+
+ @see PaStreamParameters, PaStreamCallback, Pa_ReadStream, Pa_WriteStream,
+ Pa_GetStreamReadAvailable, Pa_GetStreamWriteAvailable
+*/
+PaError Pa_OpenStream( PaStream** stream,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData );
+
+
+/** A simplified version of Pa_OpenStream() that opens the default input
+ and/or output devices.
+
+ @param stream The address of a PaStream pointer which will receive
+ a pointer to the newly opened stream.
+
+ @param numInputChannels The number of channels of sound that will be supplied
+ to the stream callback or returned by Pa_ReadStream. It can range from 1 to
+ the value of maxInputChannels in the PaDeviceInfo record for the default input
+ device. If 0 the stream is opened as an output-only stream.
+
+ @param numOutputChannels The number of channels of sound to be delivered to the
+ stream callback or passed to Pa_WriteStream. It can range from 1 to the value
+ of maxOutputChannels in the PaDeviceInfo record for the default output dvice.
+ If 0 the stream is opened as an output-only stream.
+
+ @param sampleFormat The sample format of both the input and output buffers
+ provided to the callback or passed to and from Pa_ReadStream and Pa_WriteStream.
+ sampleFormat may be any of the formats described by the PaSampleFormat
+ enumeration.
+
+ @param sampleRate Same as Pa_OpenStream parameter of the same name.
+ @param framesPerBuffer Same as Pa_OpenStream parameter of the same name.
+ @param streamCallback Same as Pa_OpenStream parameter of the same name.
+ @param userData Same as Pa_OpenStream parameter of the same name.
+
+ @return As for Pa_OpenStream
+
+ @see Pa_OpenStream, PaStreamCallback
+*/
+PaError Pa_OpenDefaultStream( PaStream** stream,
+ int numInputChannels,
+ int numOutputChannels,
+ PaSampleFormat sampleFormat,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamCallback *streamCallback,
+ void *userData );
+
+
+/** Closes an audio stream. If the audio stream is active it
+ discards any pending buffers as if Pa_AbortStream() had been called.
+*/
+PaError Pa_CloseStream( PaStream *stream );
+
+
+/** Functions of type PaStreamFinishedCallback are implemented by PortAudio
+ clients. They can be registered with a stream using the Pa_SetStreamFinishedCallback
+ function. Once registered they are called when the stream becomes inactive
+ (ie once a call to Pa_StopStream() will not block).
+ A stream will become inactive after the stream callback returns non-zero,
+ or when Pa_StopStream or Pa_AbortStream is called. For a stream providing audio
+ output, if the stream callback returns paComplete, or Pa_StopStream is called,
+ the stream finished callback will not be called until all generated sample data
+ has been played.
+
+ @param userData The userData parameter supplied to Pa_OpenStream()
+
+ @see Pa_SetStreamFinishedCallback
+*/
+typedef void PaStreamFinishedCallback( void *userData );
+
+
+/** Register a stream finished callback function which will be called when the
+ stream becomes inactive. See the description of PaStreamFinishedCallback for
+ further details about when the callback will be called.
+
+ @param stream a pointer to a PaStream that is in the stopped state - if the
+ stream is not stopped, the stream's finished callback will remain unchanged
+ and an error code will be returned.
+
+ @param streamFinishedCallback a pointer to a function with the same signature
+ as PaStreamFinishedCallback, that will be called when the stream becomes
+ inactive. Passing NULL for this parameter will un-register a previously
+ registered stream finished callback function.
+
+ @return on success returns paNoError, otherwise an error code indicating the cause
+ of the error.
+
+ @see PaStreamFinishedCallback
+*/
+PaError Pa_SetStreamFinishedCallback( PaStream *stream, PaStreamFinishedCallback* streamFinishedCallback );
+
+
+/** Commences audio processing.
+*/
+PaError Pa_StartStream( PaStream *stream );
+
+
+/** Terminates audio processing. It waits until all pending
+ audio buffers have been played before it returns.
+*/
+PaError Pa_StopStream( PaStream *stream );
+
+
+/** Terminates audio processing immediately without waiting for pending
+ buffers to complete.
+*/
+PaError Pa_AbortStream( PaStream *stream );
+
+
+/** Determine whether the stream is stopped.
+ A stream is considered to be stopped prior to a successful call to
+ Pa_StartStream and after a successful call to Pa_StopStream or Pa_AbortStream.
+ If a stream callback returns a value other than paContinue the stream is NOT
+ considered to be stopped.
+
+ @return Returns one (1) when the stream is stopped, zero (0) when
+ the stream is running or, a PaErrorCode (which are always negative) if
+ PortAudio is not initialized or an error is encountered.
+
+ @see Pa_StopStream, Pa_AbortStream, Pa_IsStreamActive
+*/
+PaError Pa_IsStreamStopped( PaStream *stream );
+
+
+/** Determine whether the stream is active.
+ A stream is active after a successful call to Pa_StartStream(), until it
+ becomes inactive either as a result of a call to Pa_StopStream() or
+ Pa_AbortStream(), or as a result of a return value other than paContinue from
+ the stream callback. In the latter case, the stream is considered inactive
+ after the last buffer has finished playing.
+
+ @return Returns one (1) when the stream is active (ie playing or recording
+ audio), zero (0) when not playing or, a PaErrorCode (which are always negative)
+ if PortAudio is not initialized or an error is encountered.
+
+ @see Pa_StopStream, Pa_AbortStream, Pa_IsStreamStopped
+*/
+PaError Pa_IsStreamActive( PaStream *stream );
+
+
+
+/** A structure containing unchanging information about an open stream.
+ @see Pa_GetStreamInfo
+*/
+
+typedef struct PaStreamInfo
+{
+ /** this is struct version 1 */
+ int structVersion;
+
+ /** The input latency of the stream in seconds. This value provides the most
+ accurate estimate of input latency available to the implementation. It may
+ differ significantly from the suggestedLatency value passed to Pa_OpenStream().
+ The value of this field will be zero (0.) for output-only streams.
+ @see PaTime
+ */
+ PaTime inputLatency;
+
+ /** The output latency of the stream in seconds. This value provides the most
+ accurate estimate of output latency available to the implementation. It may
+ differ significantly from the suggestedLatency value passed to Pa_OpenStream().
+ The value of this field will be zero (0.) for input-only streams.
+ @see PaTime
+ */
+ PaTime outputLatency;
+
+ /** The sample rate of the stream in Hertz (samples per second). In cases
+ where the hardware sample rate is inaccurate and PortAudio is aware of it,
+ the value of this field may be different from the sampleRate parameter
+ passed to Pa_OpenStream(). If information about the actual hardware sample
+ rate is not available, this field will have the same value as the sampleRate
+ parameter passed to Pa_OpenStream().
+ */
+ double sampleRate;
+
+} PaStreamInfo;
+
+
+/** Retrieve a pointer to a PaStreamInfo structure containing information
+ about the specified stream.
+ @return A pointer to an immutable PaStreamInfo structure. If the stream
+ parameter invalid, or an error is encountered, the function returns NULL.
+
+ @param stream A pointer to an open stream previously created with Pa_OpenStream.
+
+ @note PortAudio manages the memory referenced by the returned pointer,
+ the client must not manipulate or free the memory. The pointer is only
+ guaranteed to be valid until the specified stream is closed.
+
+ @see PaStreamInfo
+*/
+const PaStreamInfo* Pa_GetStreamInfo( PaStream *stream );
+
+
+/** Determine the current time for the stream according to the same clock used
+ to generate buffer timestamps. This time may be used for syncronising other
+ events to the audio stream, for example synchronizing audio to MIDI.
+
+ @return The stream's current time in seconds, or 0 if an error occurred.
+
+ @see PaTime, PaStreamCallback
+*/
+PaTime Pa_GetStreamTime( PaStream *stream );
+
+
+/** Retrieve CPU usage information for the specified stream.
+ The "CPU Load" is a fraction of total CPU time consumed by a callback stream's
+ audio processing routines including, but not limited to the client supplied
+ stream callback. This function does not work with blocking read/write streams.
+
+ This function may be called from the stream callback function or the
+ application.
+
+ @return
+ A floating point value, typically between 0.0 and 1.0, where 1.0 indicates
+ that the stream callback is consuming the maximum number of CPU cycles possible
+ to maintain real-time operation. A value of 0.5 would imply that PortAudio and
+ the stream callback was consuming roughly 50% of the available CPU time. The
+ return value may exceed 1.0. A value of 0.0 will always be returned for a
+ blocking read/write stream, or if an error occurrs.
+*/
+double Pa_GetStreamCpuLoad( PaStream* stream );
+
+
+/** Read samples from an input stream. The function doesn't return until
+ the entire buffer has been filled - this may involve waiting for the operating
+ system to supply the data.
+
+ @param stream A pointer to an open stream previously created with Pa_OpenStream.
+
+ @param buffer A pointer to a buffer of sample frames. The buffer contains
+ samples in the format specified by the inputParameters->sampleFormat field
+ used to open the stream, and the number of channels specified by
+ inputParameters->numChannels. If non-interleaved samples were requested,
+ buffer is a pointer to the first element of an array of non-interleaved
+ buffer pointers, one for each channel.
+
+ @param frames The number of frames to be read into buffer. This parameter
+ is not constrained to a specific range, however high performance applications
+ will want to match this parameter to the framesPerBuffer parameter used
+ when opening the stream.
+
+ @return On success PaNoError will be returned, or PaInputOverflowed if input
+ data was discarded by PortAudio after the previous call and before this call.
+*/
+PaError Pa_ReadStream( PaStream* stream,
+ void *buffer,
+ unsigned long frames );
+
+
+/** Write samples to an output stream. This function doesn't return until the
+ entire buffer has been consumed - this may involve waiting for the operating
+ system to consume the data.
+
+ @param stream A pointer to an open stream previously created with Pa_OpenStream.
+
+ @param buffer A pointer to a buffer of sample frames. The buffer contains
+ samples in the format specified by the outputParameters->sampleFormat field
+ used to open the stream, and the number of channels specified by
+ outputParameters->numChannels. If non-interleaved samples were requested,
+ buffer is a pointer to the first element of an array of non-interleaved
+ buffer pointers, one for each channel.
+
+ @param frames The number of frames to be written from buffer. This parameter
+ is not constrained to a specific range, however high performance applications
+ will want to match this parameter to the framesPerBuffer parameter used
+ when opening the stream.
+
+ @return On success PaNoError will be returned, or paOutputUnderflowed if
+ additional output data was inserted after the previous call and before this
+ call.
+*/
+PaError Pa_WriteStream( PaStream* stream,
+ const void *buffer,
+ unsigned long frames );
+
+
+/** Retrieve the number of frames that can be read from the stream without
+ waiting.
+
+ @return Returns a non-negative value representing the maximum number of frames
+ that can be read from the stream without blocking or busy waiting or, a
+ PaErrorCode (which are always negative) if PortAudio is not initialized or an
+ error is encountered.
+*/
+signed long Pa_GetStreamReadAvailable( PaStream* stream );
+
+
+/** Retrieve the number of frames that can be written to the stream without
+ waiting.
+
+ @return Returns a non-negative value representing the maximum number of frames
+ that can be written to the stream without blocking or busy waiting or, a
+ PaErrorCode (which are always negative) if PortAudio is not initialized or an
+ error is encountered.
+*/
+signed long Pa_GetStreamWriteAvailable( PaStream* stream );
+
+
+/* Miscellaneous utilities */
+
+
+/** Retrieve the size of a given sample format in bytes.
+
+ @return The size in bytes of a single sample in the specified format,
+ or paSampleFormatNotSupported if the format is not supported.
+*/
+PaError Pa_GetSampleSize( PaSampleFormat format );
+
+
+/** Put the caller to sleep for at least 'msec' milliseconds. This function is
+ provided only as a convenience for authors of portable code (such as the tests
+ and examples in the PortAudio distribution.)
+
+ The function may sleep longer than requested so don't rely on this for accurate
+ musical timing.
+*/
+void Pa_Sleep( long msec );
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PORTAUDIO_H */
diff --git a/portaudio/pa_linux_alsa/pa_linux_alsa.c b/portaudio/pa_linux_alsa/pa_linux_alsa.c
new file mode 100644
index 0000000000000000000000000000000000000000..283c3e9fe328af35817eb2dbce67e092820e157e
--- /dev/null
+++ b/portaudio/pa_linux_alsa/pa_linux_alsa.c
@@ -0,0 +1,3379 @@
+/*
+ * $Id$
+ * PortAudio Portable Real-Time Audio Library
+ * Latest Version at: http://www.portaudio.com
+ * ALSA implementation by Joshua Haberman and Arve Knudsen
+ *
+ * Copyright (c) 2002 Joshua Haberman <joshua@haberman.com>
+ * Copyright (c) 2005 Arve Knudsen <aknuds-1@broadpark.no>
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#define ALSA_PCM_NEW_HW_PARAMS_API
+#define ALSA_PCM_NEW_SW_PARAMS_API
+#include <alsa/asoundlib.h>
+#undef ALSA_PCM_NEW_HW_PARAMS_API
+#undef ALSA_PCM_NEW_SW_PARAMS_API
+
+#include <sys/poll.h>
+#include <string.h> /* strlen() */
+#include <limits.h>
+#include <math.h>
+#include <pthread.h>
+#include <signal.h>
+#include <time.h>
+#include <sys/mman.h>
+#include <signal.h> /* For sig_atomic_t */
+
+#include "portaudio.h"
+#include "pa_util.h"
+#include "../pa_unix/pa_unix_util.h"
+#include "pa_allocation.h"
+#include "pa_hostapi.h"
+#include "pa_stream.h"
+#include "pa_cpuload.h"
+#include "pa_process.h"
+
+#include "pa_linux_alsa.h"
+
+/* Check return value of ALSA function, and map it to PaError */
+#define ENSURE_(expr, code) \
+ do { \
+ if( UNLIKELY( (aErr_ = (expr)) < 0 ) ) \
+ { \
+ /* PaUtil_SetLastHostErrorInfo should only be used in the main thread */ \
+ if( (code) == paUnanticipatedHostError && pthread_self() != callbackThread_ ) \
+ { \
+ PaUtil_SetLastHostErrorInfo( paALSA, aErr_, snd_strerror( aErr_ ) ); \
+ } \
+ PaUtil_DebugPrint( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" ); \
+ result = (code); \
+ goto error; \
+ } \
+ } while( 0 );
+
+#define ENSURE_SYSTEM_(expr, success) \
+ do { \
+ if( UNLIKELY( (aErr_ = (expr)) != success ) ) \
+ { \
+ /* PaUtil_SetLastHostErrorInfo should only be used in the main thread */ \
+ if( pthread_self() != callbackThread_ ) \
+ { \
+ PaUtil_SetLastHostErrorInfo( paALSA, aErr_, strerror( aErr_ ) ); \
+ } \
+ PaUtil_DebugPrint( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" ); \
+ result = paUnanticipatedHostError; \
+ goto error; \
+ } \
+ } while( 0 );
+
+#define ASSERT_CALL_(expr, success) \
+ aErr_ = (expr); \
+ assert( success == aErr_ );
+
+static int aErr_; /* Used with ENSURE_ */
+static pthread_t callbackThread_;
+
+typedef enum
+{
+ StreamDirection_In,
+ StreamDirection_Out
+} StreamDirection;
+
+/* Threading utility struct */
+typedef struct PaAlsaThreading
+{
+ pthread_t watchdogThread;
+ pthread_t callbackThread;
+ int watchdogRunning;
+ int rtSched;
+ int rtPrio;
+ int useWatchdog;
+ unsigned long throttledSleepTime;
+ volatile PaTime callbackTime;
+ volatile PaTime callbackCpuTime;
+ PaUtilCpuLoadMeasurer *cpuLoadMeasurer;
+} PaAlsaThreading;
+
+typedef struct
+{
+ PaSampleFormat hostSampleFormat;
+ unsigned long framesPerBuffer;
+ int numUserChannels, numHostChannels;
+ int userInterleaved, hostInterleaved;
+
+ snd_pcm_t *pcm;
+ snd_pcm_uframes_t bufferSize;
+ snd_pcm_format_t nativeFormat;
+ unsigned int nfds;
+ int ready; /* Marked ready from poll */
+ void **userBuffers;
+ snd_pcm_uframes_t offset;
+ StreamDirection streamDir;
+
+ snd_pcm_channel_area_t *channelAreas; /* Needed for channel adaption */
+} PaAlsaStreamComponent;
+
+/* Implementation specific stream structure */
+typedef struct PaAlsaStream
+{
+ PaUtilStreamRepresentation streamRepresentation;
+ PaUtilCpuLoadMeasurer cpuLoadMeasurer;
+ PaUtilBufferProcessor bufferProcessor;
+ PaAlsaThreading threading;
+
+ unsigned long framesPerUserBuffer;
+
+ int primeBuffers;
+ int callbackMode; /* bool: are we running in callback mode? */
+ int pcmsSynced; /* Have we successfully synced pcms */
+
+ /* the callback thread uses these to poll the sound device(s), waiting
+ * for data to be ready/available */
+ struct pollfd *pfds;
+ int pollTimeout;
+
+ /* Used in communication between threads */
+ volatile sig_atomic_t callback_finished; /* bool: are we in the "callback finished" state? */
+ volatile sig_atomic_t callbackAbort; /* Drop frames? */
+ volatile sig_atomic_t callbackStop; /* Signal a stop */
+ volatile sig_atomic_t isActive; /* Is stream in active state? (Between StartStream and StopStream || !paContinue) */
+ pthread_mutex_t stateMtx; /* Used to synchronize access to stream state */
+ pthread_mutex_t startMtx; /* Used to synchronize stream start in callback mode */
+ pthread_cond_t startCond; /* Wait untill audio is started in callback thread */
+
+ int neverDropInput;
+
+ PaTime underrun;
+ PaTime overrun;
+
+ PaAlsaStreamComponent capture, playback;
+}
+PaAlsaStream;
+
+/* PaAlsaHostApiRepresentation - host api datastructure specific to this implementation */
+
+typedef struct PaAlsaHostApiRepresentation
+{
+ PaUtilHostApiRepresentation commonHostApiRep;
+ PaUtilStreamInterface callbackStreamInterface;
+ PaUtilStreamInterface blockingStreamInterface;
+
+ PaUtilAllocationGroup *allocations;
+
+ PaHostApiIndex hostApiIndex;
+}
+PaAlsaHostApiRepresentation;
+
+typedef struct PaAlsaDeviceInfo
+{
+ PaDeviceInfo commonDeviceInfo;
+ char *alsaName;
+ int isPlug;
+ int minInputChannels;
+ int minOutputChannels;
+}
+PaAlsaDeviceInfo;
+
+/* Threading utilities */
+
+static void InitializeThreading( PaAlsaThreading *th, PaUtilCpuLoadMeasurer *clm )
+{
+ th->watchdogRunning = 0;
+ th->rtSched = 0;
+ th->callbackTime = 0;
+ th->callbackCpuTime = 0;
+ th->useWatchdog = 1;
+ th->throttledSleepTime = 0;
+ th->cpuLoadMeasurer = clm;
+
+ th->rtPrio = (sched_get_priority_max( SCHED_FIFO ) - sched_get_priority_min( SCHED_FIFO )) / 2
+ + sched_get_priority_min( SCHED_FIFO );
+}
+
+static PaError KillCallbackThread( PaAlsaThreading *th, int wait, PaError *exitResult, PaError *watchdogExitResult )
+{
+ PaError result = paNoError;
+ void *pret;
+
+ if( exitResult )
+ *exitResult = paNoError;
+ if( watchdogExitResult )
+ *watchdogExitResult = paNoError;
+
+ if( th->watchdogRunning )
+ {
+ pthread_cancel( th->watchdogThread );
+ ENSURE_SYSTEM_( pthread_join( th->watchdogThread, &pret ), 0 );
+
+ if( pret && pret != PTHREAD_CANCELED )
+ {
+ if( watchdogExitResult )
+ *watchdogExitResult = *(PaError *) pret;
+ free( pret );
+ }
+ }
+
+ /* Only kill the thread if it isn't in the process of stopping (flushing adaptation buffers) */
+ /* TODO: Make join time out */
+ if( !wait )
+ {
+ pthread_cancel( th->callbackThread ); /* XXX: Safe to call this if the thread has exited on its own? */
+ PA_DEBUG(( "Canceled callback thread\n" ));
+ }
+ ENSURE_SYSTEM_( pthread_join( th->callbackThread, &pret ), 0 );
+
+ if( pret && pret != PTHREAD_CANCELED )
+ {
+ if( exitResult )
+ *exitResult = *(PaError *) pret;
+ free( pret );
+ }
+
+error:
+ return result;
+}
+
+/** Lock a pthread_mutex_t.
+ *
+ * @concern ThreadCancellation We're disabling thread cancellation while the thread is holding a lock, so mutexes are
+ * properly unlocked at termination time.
+ */
+static PaError LockMutex( pthread_mutex_t *mtx )
+{
+ PaError result = paNoError;
+ int oldState;
+
+ ENSURE_SYSTEM_( pthread_setcancelstate( PTHREAD_CANCEL_DISABLE, &oldState ), 0 );
+ ENSURE_SYSTEM_( pthread_mutex_lock( mtx ), 0 );
+
+error:
+ return result;
+}
+
+/** Unlock a pthread_mutex_t.
+ *
+ * @concern ThreadCancellation Thread cancellation is enabled again after the mutex is properly unlocked.
+ */
+static PaError UnlockMutex( pthread_mutex_t *mtx )
+{
+ PaError result = paNoError;
+ int oldState;
+
+ ENSURE_SYSTEM_( pthread_mutex_unlock( mtx ), 0 );
+ ENSURE_SYSTEM_( pthread_setcancelstate( PTHREAD_CANCEL_ENABLE, &oldState ), 0 );
+
+error:
+ return result;
+}
+
+static void OnWatchdogExit( void *userData )
+{
+ PaAlsaThreading *th = (PaAlsaThreading *) userData;
+ struct sched_param spm = { 0 };
+ assert( th );
+
+ ASSERT_CALL_( pthread_setschedparam( th->callbackThread, SCHED_OTHER, &spm ), 0 ); /* Lower before exiting */
+ PA_DEBUG(( "Watchdog exiting\n" ));
+}
+
+static PaError BoostPriority( PaAlsaThreading *th )
+{
+ PaError result = paNoError;
+ struct sched_param spm = { 0 };
+ spm.sched_priority = th->rtPrio;
+
+ assert( th );
+
+ if( pthread_setschedparam( th->callbackThread, SCHED_FIFO, &spm ) != 0 )
+ {
+ PA_UNLESS( errno == EPERM, paInternalError ); /* Lack permission to raise priority */
+ PA_DEBUG(( "Failed bumping priority\n" ));
+ result = 0;
+ }
+ else
+ result = 1; /* Success */
+error:
+ return result;
+}
+
+static void *WatchdogFunc( void *userData )
+{
+ PaError result = paNoError, *pres = NULL;
+ int err;
+ PaAlsaThreading *th = (PaAlsaThreading *) userData;
+ unsigned intervalMsec = 500;
+ const PaTime maxSeconds = 3.; /* Max seconds between callbacks */
+ PaTime timeThen = PaUtil_GetTime(), timeNow, timeElapsed, cpuTimeThen, cpuTimeNow, cpuTimeElapsed;
+ double cpuLoad, avgCpuLoad = 0.;
+ int throttled = 0;
+
+ assert( th );
+
+ pthread_cleanup_push( &OnWatchdogExit, th ); /* Execute OnWatchdogExit when exiting */
+
+ /* Boost priority of callback thread */
+ PA_ENSURE( result = BoostPriority( th ) );
+ if( !result )
+ {
+ pthread_exit( NULL ); /* Boost failed, might as well exit */
+ }
+
+ cpuTimeThen = th->callbackCpuTime;
+ {
+ int policy;
+ struct sched_param spm = { 0 };
+ pthread_getschedparam( pthread_self(), &policy, &spm );
+ PA_DEBUG(( "%s: Watchdog priority is %d\n", __FUNCTION__, spm.sched_priority ));
+ }
+
+ while( 1 )
+ {
+ double lowpassCoeff = 0.9, lowpassCoeff1 = 0.99999 - lowpassCoeff;
+
+ /* Test before and after in case whatever underlying sleep call isn't interrupted by pthread_cancel */
+ pthread_testcancel();
+ Pa_Sleep( intervalMsec );
+ pthread_testcancel();
+
+ if( PaUtil_GetTime() - th->callbackTime > maxSeconds )
+ {
+ PA_DEBUG(( "Watchdog: Terminating callback thread\n" ));
+ /* Tell thread to terminate */
+ err = pthread_kill( th->callbackThread, SIGKILL );
+ pthread_exit( NULL );
+ }
+
+ PA_DEBUG(( "%s: PortAudio reports CPU load: %g\n", __FUNCTION__, PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) ));
+
+ /* Check if we should throttle, or unthrottle :P */
+ cpuTimeNow = th->callbackCpuTime;
+ cpuTimeElapsed = cpuTimeNow - cpuTimeThen;
+ cpuTimeThen = cpuTimeNow;
+
+ timeNow = PaUtil_GetTime();
+ timeElapsed = timeNow - timeThen;
+ timeThen = timeNow;
+ cpuLoad = cpuTimeElapsed / timeElapsed;
+ avgCpuLoad = avgCpuLoad * lowpassCoeff + cpuLoad * lowpassCoeff1;
+ /*
+ if( throttled )
+ PA_DEBUG(( "Watchdog: CPU load: %g, %g\n", avgCpuLoad, cpuTimeElapsed ));
+ */
+ if( PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) > .925 )
+ {
+ static int policy;
+ static struct sched_param spm = { 0 };
+ static const struct sched_param defaultSpm = { 0 };
+ PA_DEBUG(( "%s: Throttling audio thread, priority %d\n", __FUNCTION__, spm.sched_priority ));
+
+ pthread_getschedparam( th->callbackThread, &policy, &spm );
+ if( !pthread_setschedparam( th->callbackThread, SCHED_OTHER, &defaultSpm ) )
+ {
+ throttled = 1;
+ }
+ else
+ PA_DEBUG(( "Watchdog: Couldn't lower priority of audio thread: %s\n", strerror( errno ) ));
+
+ /* Give other processes a go, before raising priority again */
+ PA_DEBUG(( "%s: Watchdog sleeping for %lu msecs before unthrottling\n", __FUNCTION__, th->throttledSleepTime ));
+ Pa_Sleep( th->throttledSleepTime );
+
+ /* Reset callback priority */
+ if( pthread_setschedparam( th->callbackThread, SCHED_FIFO, &spm ) != 0 )
+ {
+ PA_DEBUG(( "%s: Couldn't raise priority of audio thread: %s\n", __FUNCTION__, strerror( errno ) ));
+ }
+
+ if( PaUtil_GetCpuLoad( th->cpuLoadMeasurer ) >= .99 )
+ intervalMsec = 50;
+ else
+ intervalMsec = 100;
+
+ /*
+ lowpassCoeff = .97;
+ lowpassCoeff1 = .99999 - lowpassCoeff;
+ */
+ }
+ else if( throttled && avgCpuLoad < .8 )
+ {
+ intervalMsec = 500;
+ throttled = 0;
+
+ /*
+ lowpassCoeff = .9;
+ lowpassCoeff1 = .99999 - lowpassCoeff;
+ */
+ }
+ }
+
+ pthread_cleanup_pop( 1 ); /* Execute cleanup on exit */
+
+error:
+ /* Shouldn't get here in the normal case */
+
+ /* Pass on error code */
+ pres = malloc( sizeof (PaError) );
+ *pres = result;
+
+ pthread_exit( pres );
+}
+
+static PaError CreateCallbackThread( PaAlsaThreading *th, void *(*callbackThreadFunc)( void * ), PaStream *s )
+{
+ PaError result = paNoError;
+ pthread_attr_t attr;
+ int started = 0;
+
+#if defined _POSIX_MEMLOCK && (_POSIX_MEMLOCK != -1)
+ if( th->rtSched )
+ {
+ if( mlockall( MCL_CURRENT | MCL_FUTURE ) < 0 )
+ {
+ int savedErrno = errno; /* In case errno gets overwritten */
+ assert( savedErrno != EINVAL ); /* Most likely a programmer error */
+ PA_UNLESS( (savedErrno == EPERM), paInternalError );
+ PA_DEBUG(( "%s: Failed locking memory\n", __FUNCTION__ ));
+ }
+ else
+ PA_DEBUG(( "%s: Successfully locked memory\n", __FUNCTION__ ));
+ }
+#endif
+
+ PA_UNLESS( !pthread_attr_init( &attr ), paInternalError );
+ /* Priority relative to other processes */
+ PA_UNLESS( !pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ), paInternalError );
+
+ PA_UNLESS( !pthread_create( &th->callbackThread, &attr, callbackThreadFunc, s ), paInternalError );
+ started = 1;
+
+ if( th->rtSched )
+ {
+ if( th->useWatchdog )
+ {
+ int err;
+ struct sched_param wdSpm = { 0 };
+ /* Launch watchdog, watchdog sets callback thread priority */
+ int prio = PA_MIN( th->rtPrio + 4, sched_get_priority_max( SCHED_FIFO ) );
+ wdSpm.sched_priority = prio;
+
+ PA_UNLESS( !pthread_attr_init( &attr ), paInternalError );
+ PA_UNLESS( !pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED ), paInternalError );
+ PA_UNLESS( !pthread_attr_setscope( &attr, PTHREAD_SCOPE_SYSTEM ), paInternalError );
+ PA_UNLESS( !pthread_attr_setschedpolicy( &attr, SCHED_FIFO ), paInternalError );
+ PA_UNLESS( !pthread_attr_setschedparam( &attr, &wdSpm ), paInternalError );
+ if( (err = pthread_create( &th->watchdogThread, &attr, &WatchdogFunc, th )) )
+ {
+ PA_UNLESS( err == EPERM, paInternalError );
+ /* Permission error, go on without realtime privileges */
+ PA_DEBUG(( "Failed bumping priority\n" ));
+ }
+ else
+ {
+ int policy;
+ th->watchdogRunning = 1;
+ ENSURE_SYSTEM_( pthread_getschedparam( th->watchdogThread, &policy, &wdSpm ), 0 );
+ /* Check if priority is right, policy could potentially differ from SCHED_FIFO (but that's alright) */
+ if( wdSpm.sched_priority != prio )
+ {
+ PA_DEBUG(( "Watchdog priority not set correctly (%d)\n", wdSpm.sched_priority ));
+ PA_ENSURE( paInternalError );
+ }
+ }
+ }
+ else
+ PA_ENSURE( BoostPriority( th ) );
+ }
+
+end:
+ return result;
+error:
+ if( started )
+ KillCallbackThread( th, 0, NULL, NULL );
+
+ goto end;
+}
+
+static void CallbackUpdate( PaAlsaThreading *th )
+{
+ th->callbackTime = PaUtil_GetTime();
+ th->callbackCpuTime = PaUtil_GetCpuLoad( th->cpuLoadMeasurer );
+}
+
+/* prototypes for functions declared in this file */
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate );
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *callback,
+ void *userData );
+static PaError CloseStream( PaStream* stream );
+static PaError StartStream( PaStream *stream );
+static PaError StopStream( PaStream *stream );
+static PaError AbortStream( PaStream *stream );
+static PaError IsStreamStopped( PaStream *s );
+static PaError IsStreamActive( PaStream *stream );
+static PaTime GetStreamTime( PaStream *stream );
+static double GetStreamCpuLoad( PaStream* stream );
+static PaError BuildDeviceList( PaAlsaHostApiRepresentation *hostApi );
+static int SetApproximateSampleRate( snd_pcm_t *pcm, snd_pcm_hw_params_t *hwParams, double sampleRate );
+static int GetExactSampleRate( snd_pcm_hw_params_t *hwParams, double *sampleRate );
+
+/* Callback prototypes */
+static void *CallbackThreadFunc( void *userData );
+
+/* Blocking prototypes */
+static signed long GetStreamReadAvailable( PaStream* s );
+static signed long GetStreamWriteAvailable( PaStream* s );
+static PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
+static PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
+
+
+static const PaAlsaDeviceInfo *GetDeviceInfo( const PaUtilHostApiRepresentation *hostApi, int device )
+{
+ return (const PaAlsaDeviceInfo *)hostApi->deviceInfos[device];
+}
+
+PaError PaAlsa_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
+{
+ PaError result = paNoError;
+ PaAlsaHostApiRepresentation *alsaHostApi = NULL;
+
+ PA_UNLESS( alsaHostApi = (PaAlsaHostApiRepresentation*) PaUtil_AllocateMemory(
+ sizeof(PaAlsaHostApiRepresentation) ), paInsufficientMemory );
+ PA_UNLESS( alsaHostApi->allocations = PaUtil_CreateAllocationGroup(), paInsufficientMemory );
+ alsaHostApi->hostApiIndex = hostApiIndex;
+
+ *hostApi = (PaUtilHostApiRepresentation*)alsaHostApi;
+ (*hostApi)->info.structVersion = 1;
+ (*hostApi)->info.type = paALSA;
+ (*hostApi)->info.name = "ALSA";
+
+ (*hostApi)->Terminate = Terminate;
+ (*hostApi)->OpenStream = OpenStream;
+ (*hostApi)->IsFormatSupported = IsFormatSupported;
+
+ PA_ENSURE( BuildDeviceList( alsaHostApi ) );
+
+ PaUtil_InitializeStreamInterface( &alsaHostApi->callbackStreamInterface,
+ CloseStream, StartStream,
+ StopStream, AbortStream,
+ IsStreamStopped, IsStreamActive,
+ GetStreamTime, GetStreamCpuLoad,
+ PaUtil_DummyRead, PaUtil_DummyWrite,
+ PaUtil_DummyGetReadAvailable,
+ PaUtil_DummyGetWriteAvailable );
+
+ PaUtil_InitializeStreamInterface( &alsaHostApi->blockingStreamInterface,
+ CloseStream, StartStream,
+ StopStream, AbortStream,
+ IsStreamStopped, IsStreamActive,
+ GetStreamTime, PaUtil_DummyGetCpuLoad,
+ ReadStream, WriteStream,
+ GetStreamReadAvailable,
+ GetStreamWriteAvailable );
+
+ return result;
+
+error:
+ if( alsaHostApi )
+ {
+ if( alsaHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( alsaHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( alsaHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( alsaHostApi );
+ }
+
+ return result;
+}
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
+{
+ PaAlsaHostApiRepresentation *alsaHostApi = (PaAlsaHostApiRepresentation*)hostApi;
+
+ assert( hostApi );
+
+ if( alsaHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( alsaHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( alsaHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( alsaHostApi );
+ snd_config_update_free_global();
+}
+
+/*! Determine max channels and default latencies.
+ *
+ * This function provides functionality to grope an opened (might be opened for capture or playback) pcm device for
+ * traits like max channels, suitable default latencies and default sample rate. Upon error, max channels is set to zero,
+ * and a suitable result returned. The device is closed before returning.
+ */
+static PaError GropeDevice( snd_pcm_t *pcm, int *minChannels, int *maxChannels, double *defaultLowLatency,
+ double *defaultHighLatency, double *defaultSampleRate, int isPlug )
+{
+ PaError result = paNoError;
+ snd_pcm_hw_params_t *hwParams;
+ snd_pcm_uframes_t lowLatency = 512, highLatency = 2048;
+ unsigned int minChans, maxChans;
+ double defaultSr = *defaultSampleRate;
+
+ assert( pcm );
+
+ ENSURE_( snd_pcm_nonblock( pcm, 0 ), paUnanticipatedHostError );
+
+ snd_pcm_hw_params_alloca( &hwParams );
+ snd_pcm_hw_params_any( pcm, hwParams );
+
+ if( defaultSr >= 0 )
+ {
+ /* Could be that the device opened in one mode supports samplerates that the other mode wont have,
+ * so try again .. */
+ if( SetApproximateSampleRate( pcm, hwParams, defaultSr ) < 0 )
+ {
+ defaultSr = -1.;
+ PA_DEBUG(( "%s: Original default samplerate failed, trying again ..\n", __FUNCTION__ ));
+ }
+ }
+
+ if( defaultSr < 0. ) /* Default sample rate not set */
+ {
+ unsigned int sampleRate = 44100; /* Will contain approximate rate returned by alsa-lib */
+ ENSURE_( snd_pcm_hw_params_set_rate_near( pcm, hwParams, &sampleRate, NULL ), paUnanticipatedHostError );
+ ENSURE_( GetExactSampleRate( hwParams, &defaultSr ), paUnanticipatedHostError );
+ }
+
+ ENSURE_( snd_pcm_hw_params_get_channels_min( hwParams, &minChans ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_get_channels_max( hwParams, &maxChans ), paUnanticipatedHostError );
+ assert( maxChans <= INT_MAX );
+ assert( maxChans > 0 ); /* Weird linking issue could cause wrong version of ALSA symbols to be called,
+ resulting in zeroed values */
+
+ /* XXX: Limit to sensible number (ALSA plugins accept a crazy amount of channels)? */
+ if( isPlug && maxChans > 128 )
+ {
+ maxChans = 128;
+ PA_DEBUG(( "%s: Limiting number of plugin channels to %u\n", __FUNCTION__, maxChans ));
+ }
+
+ /* TWEAKME:
+ *
+ * Giving values for default min and max latency is not
+ * straightforward. Here are our objectives:
+ *
+ * * for low latency, we want to give the lowest value
+ * that will work reliably. This varies based on the
+ * sound card, kernel, CPU, etc. I think it is better
+ * to give sub-optimal latency than to give a number
+ * too low and cause dropouts. My conservative
+ * estimate at this point is to base it on 4096-sample
+ * latency at 44.1 kHz, which gives a latency of 23ms.
+ * * for high latency we want to give a large enough
+ * value that dropouts are basically impossible. This
+ * doesn't really require as much tweaking, since
+ * providing too large a number will just cause us to
+ * select the nearest setting that will work at stream
+ * config time.
+ */
+ ENSURE_( snd_pcm_hw_params_set_buffer_size_near( pcm, hwParams, &lowLatency ), paUnanticipatedHostError );
+
+ /* Have to reset hwParams, to set new buffer size */
+ ENSURE_( snd_pcm_hw_params_any( pcm, hwParams ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_buffer_size_near( pcm, hwParams, &highLatency ), paUnanticipatedHostError );
+
+ *minChannels = (int)minChans;
+ *maxChannels = (int)maxChans;
+ *defaultSampleRate = defaultSr;
+ *defaultLowLatency = (double) lowLatency / *defaultSampleRate;
+ *defaultHighLatency = (double) highLatency / *defaultSampleRate;
+
+end:
+ snd_pcm_close( pcm );
+ return result;
+
+error:
+ goto end;
+}
+
+/* Initialize device info with invalid values (maxInputChannels and maxOutputChannels are set to zero since these indicate
+ * wether input/output is available) */
+static void InitializeDeviceInfo( PaDeviceInfo *deviceInfo )
+{
+ deviceInfo->structVersion = -1;
+ deviceInfo->name = NULL;
+ deviceInfo->hostApi = -1;
+ deviceInfo->maxInputChannels = 0;
+ deviceInfo->maxOutputChannels = 0;
+ deviceInfo->defaultLowInputLatency = -1.;
+ deviceInfo->defaultLowOutputLatency = -1.;
+ deviceInfo->defaultHighInputLatency = -1.;
+ deviceInfo->defaultHighOutputLatency = -1.;
+ deviceInfo->defaultSampleRate = -1.;
+}
+
+/* Helper struct */
+typedef struct
+{
+ char *alsaName;
+ char *name;
+ int isPlug;
+ int hasPlayback;
+ int hasCapture;
+} DeviceNames;
+
+static PaError PaAlsa_StrDup( PaAlsaHostApiRepresentation *alsaApi,
+ char **dst,
+ const char *src)
+{
+ PaError result = paNoError;
+ int len = strlen( src ) + 1;
+
+ /* PA_DEBUG(("PaStrDup %s %d\n", src, len)); */
+
+ PA_UNLESS( *dst = (char *)PaUtil_GroupAllocateMemory( alsaApi->allocations, len ),
+ paInsufficientMemory );
+ strncpy( *dst, src, len );
+
+error:
+ return result;
+}
+
+/* Disregard standard plugins
+ * XXX: Might want to make the "default" plugin available, if we can make it work
+ */
+static int IgnorePlugin( const char *pluginId )
+{
+#define numIgnored 10
+ static const char *ignoredPlugins[numIgnored] = {"hw", "plughw", "plug", "default", "dsnoop", "dmix", "tee",
+ "file", "null", "shm"};
+ int i;
+
+ for( i = 0; i < numIgnored; ++i )
+ {
+ if( !strcmp( pluginId, ignoredPlugins[i] ) )
+ {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+/* Build PaDeviceInfo list, ignore devices for which we cannot determine capabilities (possibly busy, sigh) */
+static PaError BuildDeviceList( PaAlsaHostApiRepresentation *alsaApi )
+{
+ PaUtilHostApiRepresentation *commonApi = &alsaApi->commonHostApiRep;
+ PaAlsaDeviceInfo *deviceInfoArray;
+ int cardIdx = -1, devIdx = 0;
+ snd_ctl_card_info_t *cardInfo;
+ PaError result = paNoError;
+ size_t numDeviceNames = 0, maxDeviceNames = 1, i;
+ DeviceNames *deviceNames = NULL;
+ snd_config_t *topNode = NULL;
+ snd_pcm_info_t *pcmInfo;
+ int res;
+ int blocking = SND_PCM_NONBLOCK;
+ char alsaCardName[50];
+ if( getenv( "PA_ALSA_INITIALIZE_BLOCK" ) && atoi( getenv( "PA_ALSA_INITIALIZE_BLOCK" ) ) )
+ blocking = 0;
+
+ /* These two will be set to the first working input and output device, respectively */
+ commonApi->info.defaultInputDevice = paNoDevice;
+ commonApi->info.defaultOutputDevice = paNoDevice;
+
+ /* count the devices by enumerating all the card numbers */
+
+ /* snd_card_next() modifies the integer passed to it to be:
+ * the index of the first card if the parameter is -1
+ * the index of the next card if the parameter is the index of a card
+ * -1 if there are no more cards
+ *
+ * The function itself returns 0 if it succeeded. */
+ cardIdx = -1;
+ snd_ctl_card_info_alloca( &cardInfo );
+ snd_pcm_info_alloca( &pcmInfo );
+ while( snd_card_next( &cardIdx ) == 0 && cardIdx >= 0 )
+ {
+ char *cardName;
+ int devIdx = -1;
+ snd_ctl_t *ctl;
+ char buf[50];
+
+ snprintf( alsaCardName, sizeof (alsaCardName), "hw:%d", cardIdx );
+
+ /* Acquire name of card */
+ if( snd_ctl_open( &ctl, alsaCardName, 0 ) < 0 )
+ continue; /* Unable to open card :( */
+ snd_ctl_card_info( ctl, cardInfo );
+
+ PA_ENSURE( PaAlsa_StrDup( alsaApi, &cardName, snd_ctl_card_info_get_name( cardInfo )) );
+
+ while( snd_ctl_pcm_next_device( ctl, &devIdx ) == 0 && devIdx >= 0 )
+ {
+ char *alsaDeviceName, *deviceName;
+ size_t len;
+ int hasPlayback = 0, hasCapture = 0;
+ snprintf( buf, sizeof (buf), "%s:%d,%d", "hw", cardIdx, devIdx );
+
+ /* Obtain info about this particular device */
+ snd_pcm_info_set_device( pcmInfo, devIdx );
+ snd_pcm_info_set_subdevice( pcmInfo, 0 );
+ snd_pcm_info_set_stream( pcmInfo, SND_PCM_STREAM_CAPTURE );
+ if( snd_ctl_pcm_info( ctl, pcmInfo ) >= 0 )
+ hasCapture = 1;
+
+ snd_pcm_info_set_stream( pcmInfo, SND_PCM_STREAM_PLAYBACK );
+ if( snd_ctl_pcm_info( ctl, pcmInfo ) >= 0 )
+ hasPlayback = 1;
+
+ if( !hasPlayback && !hasCapture )
+ {
+ continue; /* Error */
+ }
+
+ /* The length of the string written by snprintf plus terminating 0 */
+ len = snprintf( NULL, 0, "%s: %s (%s)", cardName, snd_pcm_info_get_name( pcmInfo ), buf ) + 1;
+ PA_UNLESS( deviceName = (char *)PaUtil_GroupAllocateMemory( alsaApi->allocations, len ),
+ paInsufficientMemory );
+ snprintf( deviceName, len, "%s: %s (%s)", cardName,
+ snd_pcm_info_get_name( pcmInfo ), buf );
+
+ ++numDeviceNames;
+ if( !deviceNames || numDeviceNames > maxDeviceNames )
+ {
+ maxDeviceNames *= 2;
+ PA_UNLESS( deviceNames = (DeviceNames *) realloc( deviceNames, maxDeviceNames * sizeof (DeviceNames) ),
+ paInsufficientMemory );
+ }
+
+ PA_ENSURE( PaAlsa_StrDup( alsaApi, &alsaDeviceName, buf ) );
+
+ deviceNames[ numDeviceNames - 1 ].alsaName = alsaDeviceName;
+ deviceNames[ numDeviceNames - 1 ].name = deviceName;
+ deviceNames[ numDeviceNames - 1 ].isPlug = 0;
+ deviceNames[ numDeviceNames - 1 ].hasPlayback = hasPlayback;
+ deviceNames[ numDeviceNames - 1 ].hasCapture = hasCapture;
+ }
+ snd_ctl_close( ctl );
+ }
+
+ /* Iterate over plugin devices */
+ if( NULL == snd_config )
+ {
+ /* snd_config_update is called implicitly by some functions, if this hasn't happened snd_config will be NULL (bleh) */
+ ENSURE_( snd_config_update(), paUnanticipatedHostError );
+ PA_DEBUG(( "Updating snd_config\n" ));
+ }
+ assert( snd_config );
+ if( (res = snd_config_search( snd_config, "pcm", &topNode )) >= 0 )
+ {
+ snd_config_iterator_t i, next;
+
+ snd_config_for_each( i, next, topNode )
+ {
+ const char *tpStr = NULL, *idStr = NULL;
+ char *alsaDeviceName, *deviceName;
+ snd_config_t *n = snd_config_iterator_entry( i ), *tp = NULL;
+ if( snd_config_get_type( n ) != SND_CONFIG_TYPE_COMPOUND )
+ continue;
+
+ ENSURE_( snd_config_search( n, "type", &tp ), paUnanticipatedHostError );
+ ENSURE_( snd_config_get_string( tp, &tpStr ), paUnanticipatedHostError );
+
+ ENSURE_( snd_config_get_id( n, &idStr ), paUnanticipatedHostError );
+ if( IgnorePlugin( idStr ) )
+ {
+ PA_DEBUG(( "%s: Ignoring ALSA plugin device %s of type %s\n", __FUNCTION__, idStr, tpStr ));
+ continue;
+ }
+
+ PA_DEBUG(( "%s: Found plugin %s of type %s\n", __FUNCTION__, idStr, tpStr ));
+
+ PA_UNLESS( alsaDeviceName = (char*)PaUtil_GroupAllocateMemory( alsaApi->allocations,
+ strlen(idStr) + 6 ), paInsufficientMemory );
+ strcpy( alsaDeviceName, idStr );
+ PA_UNLESS( deviceName = (char*)PaUtil_GroupAllocateMemory( alsaApi->allocations,
+ strlen(idStr) + 1 ), paInsufficientMemory );
+ strcpy( deviceName, idStr );
+
+ ++numDeviceNames;
+ if( !deviceNames || numDeviceNames > maxDeviceNames )
+ {
+ maxDeviceNames *= 2;
+ PA_UNLESS( deviceNames = (DeviceNames *) realloc( deviceNames, maxDeviceNames * sizeof (DeviceNames) ),
+ paInsufficientMemory );
+ }
+
+ deviceNames[numDeviceNames - 1].alsaName = alsaDeviceName;
+ deviceNames[numDeviceNames - 1].name = deviceName;
+ deviceNames[numDeviceNames - 1].isPlug = 1;
+ deviceNames[numDeviceNames - 1].hasPlayback = 1;
+ deviceNames[numDeviceNames - 1].hasCapture = 1;
+ }
+ }
+ else
+ PA_DEBUG(( "%s: Iterating over ALSA plugins failed: %s\n", __FUNCTION__, snd_strerror( res ) ));
+
+ /* allocate deviceInfo memory based on the number of devices */
+ PA_UNLESS( commonApi->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
+ alsaApi->allocations, sizeof(PaDeviceInfo*) * (numDeviceNames) ), paInsufficientMemory );
+
+ /* allocate all device info structs in a contiguous block */
+ PA_UNLESS( deviceInfoArray = (PaAlsaDeviceInfo*)PaUtil_GroupAllocateMemory(
+ alsaApi->allocations, sizeof(PaAlsaDeviceInfo) * numDeviceNames ), paInsufficientMemory );
+
+ /* Loop over list of cards, filling in info, if a device is deemed unavailable (can't get name),
+ * it's ignored.
+ */
+ /* while( snd_card_next( &cardIdx ) == 0 && cardIdx >= 0 ) */
+ for( i = 0, devIdx = 0; i < numDeviceNames; ++i )
+ {
+ snd_pcm_t *pcm;
+ PaAlsaDeviceInfo *deviceInfo = &deviceInfoArray[devIdx];
+ PaDeviceInfo *commonDeviceInfo = &deviceInfo->commonDeviceInfo;
+
+ /* Zero fields */
+ InitializeDeviceInfo( commonDeviceInfo );
+
+ /* to determine device capabilities, we must open the device and query the
+ * hardware parameter configuration space */
+
+ /* Query capture */
+ if( deviceNames[i].hasCapture &&
+ snd_pcm_open( &pcm, deviceNames[i].alsaName, SND_PCM_STREAM_CAPTURE, blocking ) >= 0 )
+ {
+ if( GropeDevice( pcm, &deviceInfo->minInputChannels, &commonDeviceInfo->maxInputChannels,
+ &commonDeviceInfo->defaultLowInputLatency, &commonDeviceInfo->defaultHighInputLatency,
+ &commonDeviceInfo->defaultSampleRate, deviceNames[i].isPlug ) != paNoError )
+ continue; /* Error */
+ }
+
+ /* Query playback */
+ if( deviceNames[i].hasPlayback &&
+ snd_pcm_open( &pcm, deviceNames[i].alsaName, SND_PCM_STREAM_PLAYBACK, blocking ) >= 0 )
+ {
+ if( GropeDevice( pcm, &deviceInfo->minOutputChannels, &commonDeviceInfo->maxOutputChannels,
+ &commonDeviceInfo->defaultLowOutputLatency, &commonDeviceInfo->defaultHighOutputLatency,
+ &commonDeviceInfo->defaultSampleRate, deviceNames[i].isPlug ) != paNoError )
+ continue; /* Error */
+ }
+
+ commonDeviceInfo->structVersion = 2;
+ commonDeviceInfo->hostApi = alsaApi->hostApiIndex;
+ commonDeviceInfo->name = deviceNames[i].name;
+ deviceInfo->alsaName = deviceNames[i].alsaName;
+ deviceInfo->isPlug = deviceNames[i].isPlug;
+
+ /* A: Storing pointer to PaAlsaDeviceInfo object as pointer to PaDeviceInfo object.
+ * Should now be safe to add device info, unless the device supports neither capture nor playback
+ */
+ if( commonDeviceInfo->maxInputChannels > 0 || commonDeviceInfo->maxOutputChannels > 0 )
+ {
+ if( commonApi->info.defaultInputDevice == paNoDevice && commonDeviceInfo->maxInputChannels > 0 )
+ commonApi->info.defaultInputDevice = devIdx;
+ if( commonApi->info.defaultOutputDevice == paNoDevice && commonDeviceInfo->maxOutputChannels > 0 )
+ commonApi->info.defaultOutputDevice = devIdx;
+
+ commonApi->deviceInfos[devIdx++] = (PaDeviceInfo *) deviceInfo;
+ }
+ }
+ free( deviceNames );
+
+ commonApi->info.deviceCount = devIdx; /* Number of successfully queried devices */
+
+end:
+ return result;
+
+error:
+ /* No particular action */
+ goto end;
+}
+
+/* Check against known device capabilities */
+static PaError ValidateParameters( const PaStreamParameters *parameters, PaUtilHostApiRepresentation *hostApi, StreamDirection mode )
+{
+ PaError result = paNoError;
+ int maxChans;
+ const PaAlsaDeviceInfo *deviceInfo = NULL;
+ assert( parameters );
+
+ if( parameters->device != paUseHostApiSpecificDeviceSpecification )
+ {
+ assert( parameters->device < hostApi->info.deviceCount );
+ PA_UNLESS( parameters->hostApiSpecificStreamInfo == NULL, paBadIODeviceCombination );
+ deviceInfo = GetDeviceInfo( hostApi, parameters->device );
+ }
+ else
+ {
+ const PaAlsaStreamInfo *streamInfo = parameters->hostApiSpecificStreamInfo;
+
+ PA_UNLESS( parameters->device == paUseHostApiSpecificDeviceSpecification, paInvalidDevice );
+ PA_UNLESS( streamInfo->size == sizeof (PaAlsaStreamInfo) && streamInfo->version == 1,
+ paIncompatibleHostApiSpecificStreamInfo );
+ PA_UNLESS( streamInfo->deviceString != NULL, paInvalidDevice );
+
+ /* Skip further checking */
+ return paNoError;
+ }
+
+ assert( deviceInfo );
+ assert( parameters->hostApiSpecificStreamInfo == NULL );
+ maxChans = (StreamDirection_In == mode ? deviceInfo->commonDeviceInfo.maxInputChannels :
+ deviceInfo->commonDeviceInfo.maxOutputChannels);
+ PA_UNLESS( parameters->channelCount <= maxChans, paInvalidChannelCount );
+
+error:
+ return result;
+}
+
+/* Given an open stream, what sample formats are available? */
+static PaSampleFormat GetAvailableFormats( snd_pcm_t *pcm )
+{
+ PaSampleFormat available = 0;
+ snd_pcm_hw_params_t *hwParams;
+ snd_pcm_hw_params_alloca( &hwParams );
+
+ snd_pcm_hw_params_any( pcm, hwParams );
+
+ if( snd_pcm_hw_params_test_format( pcm, hwParams, SND_PCM_FORMAT_FLOAT ) >= 0)
+ available |= paFloat32;
+
+ if( snd_pcm_hw_params_test_format( pcm, hwParams, SND_PCM_FORMAT_S32 ) >= 0)
+ available |= paInt32;
+
+ if( snd_pcm_hw_params_test_format( pcm, hwParams, SND_PCM_FORMAT_S24 ) >= 0)
+ available |= paInt24;
+
+ if( snd_pcm_hw_params_test_format( pcm, hwParams, SND_PCM_FORMAT_S16 ) >= 0)
+ available |= paInt16;
+
+ if( snd_pcm_hw_params_test_format( pcm, hwParams, SND_PCM_FORMAT_U8 ) >= 0)
+ available |= paUInt8;
+
+ if( snd_pcm_hw_params_test_format( pcm, hwParams, SND_PCM_FORMAT_S8 ) >= 0)
+ available |= paInt8;
+
+ return available;
+}
+
+static snd_pcm_format_t Pa2AlsaFormat( PaSampleFormat paFormat )
+{
+ switch( paFormat )
+ {
+ case paFloat32:
+ return SND_PCM_FORMAT_FLOAT;
+
+ case paInt16:
+ return SND_PCM_FORMAT_S16;
+
+ case paInt24:
+ return SND_PCM_FORMAT_S24;
+
+ case paInt32:
+ return SND_PCM_FORMAT_S32;
+
+ case paInt8:
+ return SND_PCM_FORMAT_S8;
+
+ case paUInt8:
+ return SND_PCM_FORMAT_U8;
+
+ default:
+ return SND_PCM_FORMAT_UNKNOWN;
+ }
+}
+
+/** Open an ALSA pcm handle.
+ *
+ * The device to be open can be specified in a custom PaAlsaStreamInfo struct, or it will be a device number. In case of a
+ * device number, it maybe specified through an env variable (PA_ALSA_PLUGHW) that we should open the corresponding plugin
+ * device.
+ */
+static PaError AlsaOpen( const PaUtilHostApiRepresentation *hostApi, const PaStreamParameters *params, StreamDirection
+ streamDir, snd_pcm_t **pcm )
+{
+ PaError result = paNoError;
+ int ret;
+ const char *deviceName = alloca( 50 );
+ const PaAlsaDeviceInfo *deviceInfo = NULL;
+ PaAlsaStreamInfo *streamInfo = (PaAlsaStreamInfo *)params->hostApiSpecificStreamInfo;
+
+ if( !streamInfo )
+ {
+ int usePlug = 0;
+ deviceInfo = GetDeviceInfo( hostApi, params->device );
+
+ /* If device name starts with hw: and PA_ALSA_PLUGHW is 1, we open the plughw device instead */
+ if( !strncmp( "hw:", deviceInfo->alsaName, 3 ) && getenv( "PA_ALSA_PLUGHW" ) )
+ usePlug = atoi( getenv( "PA_ALSA_PLUGHW" ) );
+ if( usePlug )
+ snprintf( (char *) deviceName, 50, "plug%s", deviceInfo->alsaName );
+ else
+ deviceName = deviceInfo->alsaName;
+ }
+ else
+ deviceName = streamInfo->deviceString;
+
+ PA_DEBUG(( "%s: Opening device %s\n", __FUNCTION__, deviceName ));
+ if( (ret = snd_pcm_open( pcm, deviceName, streamDir == StreamDirection_In ? SND_PCM_STREAM_CAPTURE : SND_PCM_STREAM_PLAYBACK,
+ SND_PCM_NONBLOCK )) < 0 )
+ {
+ *pcm = NULL; /* Not to be closed */
+ ENSURE_( ret, ret == -EBUSY ? paDeviceUnavailable : paBadIODeviceCombination );
+ }
+ ENSURE_( snd_pcm_nonblock( *pcm, 0 ), paUnanticipatedHostError );
+
+end:
+ return result;
+
+error:
+ goto end;
+}
+
+static PaError TestParameters( const PaUtilHostApiRepresentation *hostApi, const PaStreamParameters *parameters,
+ double sampleRate, StreamDirection streamDir )
+{
+ PaError result = paNoError;
+ snd_pcm_t *pcm = NULL;
+ PaSampleFormat availableFormats;
+ /* We are able to adapt to a number of channels less than what the device supports */
+ unsigned int numHostChannels;
+ PaSampleFormat hostFormat;
+ snd_pcm_hw_params_t *hwParams;
+ snd_pcm_hw_params_alloca( &hwParams );
+
+ if( !parameters->hostApiSpecificStreamInfo )
+ {
+ const PaAlsaDeviceInfo *devInfo = GetDeviceInfo( hostApi, parameters->device );
+ numHostChannels = PA_MAX( parameters->channelCount, StreamDirection_In == streamDir ?
+ devInfo->minInputChannels : devInfo->minOutputChannels );
+ }
+ else
+ numHostChannels = parameters->channelCount;
+
+ PA_ENSURE( AlsaOpen( hostApi, parameters, streamDir, &pcm ) );
+
+ snd_pcm_hw_params_any( pcm, hwParams );
+
+ if( SetApproximateSampleRate( pcm, hwParams, sampleRate ) < 0 )
+ {
+ result = paInvalidSampleRate;
+ goto error;
+ }
+
+ if( snd_pcm_hw_params_set_channels( pcm, hwParams, numHostChannels ) < 0 )
+ {
+ result = paInvalidChannelCount;
+ goto error;
+ }
+
+ /* See if we can find a best possible match */
+ availableFormats = GetAvailableFormats( pcm );
+ PA_ENSURE( hostFormat = PaUtil_SelectClosestAvailableFormat( availableFormats, parameters->sampleFormat ) );
+ ENSURE_( snd_pcm_hw_params_set_format( pcm, hwParams, Pa2AlsaFormat( hostFormat ) ), paUnanticipatedHostError );
+
+ ENSURE_( snd_pcm_hw_params( pcm, hwParams ), paUnanticipatedHostError );
+
+end:
+ if( pcm )
+ snd_pcm_close( pcm );
+ return result;
+
+error:
+ goto end;
+}
+
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate )
+{
+ int inputChannelCount = 0, outputChannelCount = 0;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+ PaError result = paFormatIsSupported;
+
+ if( inputParameters )
+ {
+ PA_ENSURE( ValidateParameters( inputParameters, hostApi, StreamDirection_In ) );
+
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+ }
+
+ if( outputParameters )
+ {
+ PA_ENSURE( ValidateParameters( outputParameters, hostApi, StreamDirection_Out ) );
+
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+ }
+
+ if( inputChannelCount )
+ {
+ if( (result = TestParameters( hostApi, inputParameters, sampleRate, StreamDirection_In ))
+ != paNoError )
+ goto error;
+ }
+ if ( outputChannelCount )
+ {
+ if( (result = TestParameters( hostApi, outputParameters, sampleRate, StreamDirection_Out ))
+ != paNoError )
+ goto error;
+ }
+
+ return paFormatIsSupported;
+
+error:
+ return result;
+}
+
+static PaError PaAlsaStreamComponent_Initialize( PaAlsaStreamComponent *self, PaAlsaHostApiRepresentation *alsaApi,
+ const PaStreamParameters *params, StreamDirection streamDir, int callbackMode )
+{
+ PaError result = paNoError;
+ PaSampleFormat userSampleFormat = params->sampleFormat, hostSampleFormat;
+ assert( params->channelCount > 0 );
+
+ /* Make sure things have an initial value */
+ memset( self, 0, sizeof (PaAlsaStreamComponent) );
+
+ if( NULL == params->hostApiSpecificStreamInfo )
+ {
+ const PaAlsaDeviceInfo *devInfo = GetDeviceInfo( &alsaApi->commonHostApiRep, params->device );
+ self->numHostChannels = PA_MAX( params->channelCount, StreamDirection_In == streamDir ? devInfo->minInputChannels
+ : devInfo->minOutputChannels );
+ }
+ else
+ {
+ /* We're blissfully unaware of the minimum channelCount */
+ self->numHostChannels = params->channelCount;
+ }
+
+ PA_ENSURE( AlsaOpen( &alsaApi->commonHostApiRep, params, streamDir, &self->pcm ) );
+ self->nfds = snd_pcm_poll_descriptors_count( self->pcm );
+ hostSampleFormat = PaUtil_SelectClosestAvailableFormat( GetAvailableFormats( self->pcm ), userSampleFormat );
+
+ self->hostSampleFormat = hostSampleFormat;
+ self->nativeFormat = Pa2AlsaFormat( hostSampleFormat );
+ self->hostInterleaved = self->userInterleaved = !(userSampleFormat & paNonInterleaved);
+ self->numUserChannels = params->channelCount;
+ self->streamDir = streamDir;
+
+ if( !callbackMode && !self->userInterleaved )
+ {
+ /* Pre-allocate non-interleaved user provided buffers */
+ PA_UNLESS( self->userBuffers = PaUtil_AllocateMemory( sizeof (void *) * self->numUserChannels ),
+ paInsufficientMemory );
+ }
+
+error:
+ return result;
+}
+
+static void PaAlsaStreamComponent_Terminate( PaAlsaStreamComponent *self )
+{
+ snd_pcm_close( self->pcm );
+ if( self->userBuffers )
+ PaUtil_FreeMemory( self->userBuffers );
+}
+
+/** Configure the associated ALSA pcm.
+ *
+ */
+static PaError PaAlsaStreamComponent_Configure( PaAlsaStreamComponent *self, const PaStreamParameters *params, unsigned long
+ framesPerHostBuffer, int primeBuffers, int callbackMode, double *sampleRate, PaTime *returnedLatency )
+{
+ /*
+ int numPeriods;
+
+ if( getenv("PA_NUMPERIODS") != NULL )
+ numPeriods = atoi( getenv("PA_NUMPERIODS") );
+ else
+ numPeriods = ( (latency * sampleRate) / *framesPerBuffer ) + 1;
+
+ PA_DEBUG(( "latency: %f, rate: %f, framesPerBuffer: %d\n", latency, sampleRate, *framesPerBuffer ));
+ if( numPeriods <= 1 )
+ numPeriods = 2;
+ */
+
+ /* Configuration consists of setting all of ALSA's parameters.
+ * These parameters come in two flavors: hardware parameters
+ * and software paramters. Hardware parameters will affect
+ * the way the device is initialized, software parameters
+ * affect the way ALSA interacts with me, the user-level client.
+ */
+
+ snd_pcm_hw_params_t *hwParams;
+ snd_pcm_sw_params_t *swParams;
+ PaError result = paNoError;
+ snd_pcm_access_t accessMode, alternateAccessMode;
+ unsigned int numPeriods, minPeriods = 2;
+ int dir = 0;
+ snd_pcm_t *pcm = self->pcm;
+ PaTime latency = params->suggestedLatency;
+ double sr = *sampleRate;
+ *returnedLatency = -1.;
+
+ snd_pcm_hw_params_alloca( &hwParams );
+ snd_pcm_sw_params_alloca( &swParams );
+
+ self->framesPerBuffer = framesPerHostBuffer;
+
+ /* ... fill up the configuration space with all possibile
+ * combinations of parameters this device will accept */
+ ENSURE_( snd_pcm_hw_params_any( pcm, hwParams ), paUnanticipatedHostError );
+
+ ENSURE_( snd_pcm_hw_params_set_periods_integer( pcm, hwParams ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_period_size_integer( pcm, hwParams ), paUnanticipatedHostError );
+
+ if( self->userInterleaved )
+ {
+ accessMode = SND_PCM_ACCESS_MMAP_INTERLEAVED;
+ alternateAccessMode = SND_PCM_ACCESS_MMAP_NONINTERLEAVED;
+ }
+ else
+ {
+ accessMode = SND_PCM_ACCESS_MMAP_NONINTERLEAVED;
+ alternateAccessMode = SND_PCM_ACCESS_MMAP_INTERLEAVED;
+ }
+
+ /* If requested access mode fails, try alternate mode */
+ if( snd_pcm_hw_params_set_access( pcm, hwParams, accessMode ) < 0 )
+ {
+ ENSURE_( snd_pcm_hw_params_set_access( pcm, hwParams, alternateAccessMode ), paUnanticipatedHostError );
+ /* Flip mode */
+ self->hostInterleaved = !self->userInterleaved;
+ }
+
+ ENSURE_( snd_pcm_hw_params_set_format( pcm, hwParams, self->nativeFormat ), paUnanticipatedHostError );
+
+ ENSURE_( SetApproximateSampleRate( pcm, hwParams, sr ), paInvalidSampleRate );
+ ENSURE_( GetExactSampleRate( hwParams, &sr ), paUnanticipatedHostError );
+ /* reject if there's no sample rate within 1% of the one requested */
+ if( (fabs( *sampleRate - sr ) / *sampleRate) > 0.01 )
+ {
+ PA_DEBUG(("%s: Wanted %f, closest sample rate was %d\n", __FUNCTION__, sampleRate, sr ));
+ PA_ENSURE( paInvalidSampleRate );
+ }
+
+ ENSURE_( snd_pcm_hw_params_set_channels( pcm, hwParams, self->numHostChannels ), paInvalidChannelCount );
+
+ /* I think there should be at least 2 periods (even though ALSA doesn't appear to enforce this) */
+ dir = 0;
+ ENSURE_( snd_pcm_hw_params_set_periods_min( pcm, hwParams, &minPeriods, &dir ), paUnanticipatedHostError );
+ dir = 0;
+ ENSURE_( snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &self->framesPerBuffer, &dir ), paUnanticipatedHostError );
+
+ /* Find an acceptable number of periods */
+ numPeriods = (latency * sr) / self->framesPerBuffer + 1;
+ dir = 0;
+ ENSURE_( snd_pcm_hw_params_set_periods_near( pcm, hwParams, &numPeriods, &dir ), paUnanticipatedHostError );
+ /* Minimum of periods should already be 2 */
+ PA_UNLESS( numPeriods >= 2, paInternalError );
+
+ /* Set the parameters! */
+ ENSURE_( snd_pcm_hw_params( pcm, hwParams ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_get_buffer_size( hwParams, &self->bufferSize ), paUnanticipatedHostError );
+
+ /* Latency in seconds, one period is not counted as latency */
+ latency = (numPeriods - 1) * self->framesPerBuffer / sr;
+
+ /* Now software parameters... */
+ ENSURE_( snd_pcm_sw_params_current( pcm, swParams ), paUnanticipatedHostError );
+
+ ENSURE_( snd_pcm_sw_params_set_start_threshold( pcm, swParams, self->framesPerBuffer ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_sw_params_set_stop_threshold( pcm, swParams, self->bufferSize ), paUnanticipatedHostError );
+
+ /* Silence buffer in the case of underrun */
+ if( !primeBuffers ) /* XXX: Make sense? */
+ {
+ snd_pcm_uframes_t boundary;
+ ENSURE_( snd_pcm_sw_params_get_boundary( swParams, &boundary ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_sw_params_set_silence_threshold( pcm, swParams, 0 ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_sw_params_set_silence_size( pcm, swParams, boundary ), paUnanticipatedHostError );
+ }
+
+ ENSURE_( snd_pcm_sw_params_set_avail_min( pcm, swParams, self->framesPerBuffer ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_sw_params_set_xfer_align( pcm, swParams, 1 ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_sw_params_set_tstamp_mode( pcm, swParams, SND_PCM_TSTAMP_MMAP ), paUnanticipatedHostError );
+
+ /* Set the parameters! */
+ ENSURE_( snd_pcm_sw_params( pcm, swParams ), paUnanticipatedHostError );
+
+ *sampleRate = sr;
+ *returnedLatency = latency;
+
+end:
+ return result;
+
+error:
+ goto end; /* No particular action */
+}
+
+static PaError PaAlsaStream_Initialize( PaAlsaStream *self, PaAlsaHostApiRepresentation *alsaApi, const PaStreamParameters *inParams,
+ const PaStreamParameters *outParams, double sampleRate, unsigned long framesPerUserBuffer, PaStreamCallback callback,
+ PaStreamFlags streamFlags, void *userData )
+{
+ PaError result = paNoError;
+ assert( self );
+
+ memset( self, 0, sizeof (PaAlsaStream) );
+
+ if( NULL != callback )
+ {
+ PaUtil_InitializeStreamRepresentation( &self->streamRepresentation,
+ &alsaApi->callbackStreamInterface,
+ callback, userData );
+ self->callbackMode = 1;
+ }
+ else
+ {
+ PaUtil_InitializeStreamRepresentation( &self->streamRepresentation,
+ &alsaApi->blockingStreamInterface,
+ NULL, userData );
+ }
+
+ self->framesPerUserBuffer = framesPerUserBuffer;
+ self->neverDropInput = streamFlags & paNeverDropInput;
+ /* XXX: Ignore paPrimeOutputBuffersUsingStreamCallback untill buffer priming is fully supported in pa_process.c */
+ /*
+ if( outParams & streamFlags & paPrimeOutputBuffersUsingStreamCallback )
+ self->primeBuffers = 1;
+ */
+ memset( &self->capture, 0, sizeof (PaAlsaStreamComponent) );
+ memset( &self->playback, 0, sizeof (PaAlsaStreamComponent) );
+ if( inParams )
+ PA_ENSURE( PaAlsaStreamComponent_Initialize( &self->capture, alsaApi, inParams, StreamDirection_In, NULL != callback ) );
+ if( outParams )
+ PA_ENSURE( PaAlsaStreamComponent_Initialize( &self->playback, alsaApi, outParams, StreamDirection_Out, NULL != callback ) );
+
+ assert( self->capture.nfds || self->playback.nfds );
+
+ PA_UNLESS( self->pfds = (struct pollfd*)PaUtil_AllocateMemory( (self->capture.nfds +
+ self->playback.nfds) * sizeof (struct pollfd) ), paInsufficientMemory );
+
+ PaUtil_InitializeCpuLoadMeasurer( &self->cpuLoadMeasurer, sampleRate );
+ InitializeThreading( &self->threading, &self->cpuLoadMeasurer );
+ ASSERT_CALL_( pthread_mutex_init( &self->stateMtx, NULL ), 0 );
+ ASSERT_CALL_( pthread_mutex_init( &self->startMtx, NULL ), 0 );
+ ASSERT_CALL_( pthread_cond_init( &self->startCond, NULL ), 0 );
+
+error:
+ return result;
+}
+
+/** Free resources associated with stream, and eventually stream itself.
+ *
+ * Frees allocated memory, and terminates individual StreamComponents.
+ */
+static void PaAlsaStream_Terminate( PaAlsaStream *self )
+{
+ assert( self );
+
+ if( self->capture.pcm )
+ {
+ PaAlsaStreamComponent_Terminate( &self->capture );
+ }
+ if( self->playback.pcm )
+ {
+ PaAlsaStreamComponent_Terminate( &self->playback );
+ }
+
+ PaUtil_FreeMemory( self->pfds );
+ ASSERT_CALL_( pthread_mutex_destroy( &self->stateMtx ), 0 );
+ ASSERT_CALL_( pthread_mutex_destroy( &self->startMtx ), 0 );
+ ASSERT_CALL_( pthread_cond_destroy( &self->startCond ), 0 );
+
+ PaUtil_FreeMemory( self );
+}
+
+/** Calculate polling timeout
+ *
+ * @param frames Time to wait
+ * @return Polling timeout in milliseconds
+ */
+static int CalculatePollTimeout( const PaAlsaStream *stream, unsigned long frames )
+{
+ assert( stream->streamRepresentation.streamInfo.sampleRate > 0.0 );
+ /* Period in msecs, rounded up */
+ return (int)ceil( 1000 * frames / stream->streamRepresentation.streamInfo.sampleRate );
+}
+
+/** Set up ALSA stream parameters.
+ *
+ */
+static PaError PaAlsaStream_Configure( PaAlsaStream *self, const PaStreamParameters *inParams, const PaStreamParameters
+ *outParams, double sampleRate, unsigned long framesPerHostBuffer, double *inputLatency, double *outputLatency,
+ unsigned long *maxHostBufferSize )
+{
+ PaError result = paNoError;
+ double realSr = sampleRate;
+
+ if( self->capture.pcm )
+ PA_ENSURE( PaAlsaStreamComponent_Configure( &self->capture, inParams, framesPerHostBuffer, self->primeBuffers,
+ self->callbackMode, &realSr, inputLatency ) );
+ if( self->playback.pcm )
+ PA_ENSURE( PaAlsaStreamComponent_Configure( &self->playback, outParams, framesPerHostBuffer, self->primeBuffers,
+ self->callbackMode, &realSr, outputLatency ) );
+
+ /* Should be exact now */
+ self->streamRepresentation.streamInfo.sampleRate = realSr;
+
+ /* this will cause the two streams to automatically start/stop/prepare in sync.
+ * We only need to execute these operations on one of the pair.
+ * A: We don't want to do this on a blocking stream.
+ */
+ if( self->callbackMode && self->capture.pcm && self->playback.pcm )
+ {
+ int err = snd_pcm_link( self->capture.pcm, self->playback.pcm );
+ if( err >= 0 )
+ self->pcmsSynced = 1;
+ else
+ PA_DEBUG(( "%s: Unable to sync pcms: %s\n", __FUNCTION__, snd_strerror( err ) ));
+ }
+
+ /* Frames per host buffer for the stream is set as a compromise between the two directions */
+ framesPerHostBuffer = PA_MIN( self->capture.pcm ? self->capture.framesPerBuffer : ULONG_MAX,
+ self->playback.pcm ? self->playback.framesPerBuffer : ULONG_MAX );
+ self->pollTimeout = CalculatePollTimeout( self, framesPerHostBuffer ); /* Period in msecs, rounded up */
+
+ *maxHostBufferSize = PA_MAX( self->capture.pcm ? self->capture.bufferSize : 0,
+ self->playback.pcm ? self->playback.bufferSize : 0 );
+
+ /* Time before watchdog unthrottles realtime thread == 1/4 of period time in msecs */
+ self->threading.throttledSleepTime = (unsigned long) (framesPerHostBuffer / sampleRate / 4 * 1000);
+
+ if( self->callbackMode )
+ {
+ /* If the user expects a certain number of frames per callback we will either have to rely on block adaption
+ * (framesPerHostBuffer is not an integer multiple of framesPerBuffer) or we can simply align the number
+ * of host buffer frames with what the user specified */
+ if( self->framesPerUserBuffer != paFramesPerBufferUnspecified )
+ {
+ /* self->alignFrames = 1; */
+
+ /* Unless the ratio between number of host and user buffer frames is an integer we will have to rely
+ * on block adaption */
+ /*
+ if( framesPerHostBuffer % framesPerBuffer != 0 || (self->capture.pcm && self->playback.pcm &&
+ self->capture.framesPerBuffer != self->playback.framesPerBuffer) )
+ self->useBlockAdaption = 1;
+ else
+ self->alignFrames = 1;
+ */
+ }
+ }
+
+error:
+ return result;
+}
+
+/* We need to determine how many frames per host buffer to use. Our
+ * goals are to provide the best possible performance, but also to
+ * most closely honor the requested latency settings. Therefore this
+ * decision is based on:
+ *
+ * - the period sizes that playback and/or capture support. The
+ * host buffer size has to be one of these.
+ * - the number of periods that playback and/or capture support.
+ *
+ * We want to make period_size*(num_periods-1) to be as close as possible
+ * to latency*rate for both playback and capture.
+ *
+ * This is one of those blocks of code that will just take a lot of
+ * refinement to be any good.
+ *
+ * In the full-duplex case it is possible that the routine was unable
+ * to find a number of frames per buffer acceptable to both devices
+ * TODO: Implement an algorithm to find the value closest to acceptance
+ * by both devices, to minimize difference between period sizes?
+ */
+static PaError DetermineFramesPerBuffer( const PaAlsaStream *stream, double sampleRate, const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters, unsigned long *determinedFrames, const PaUtilHostApiRepresentation *hostApi )
+{
+ PaError result = paNoError;
+ unsigned long framesPerBuffer = 0;
+ int numHostInputChannels = 0, numHostOutputChannels = 0;
+
+ /* XXX: Clean this up */
+ if( stream->capture.pcm )
+ {
+ const PaAlsaDeviceInfo *devInfo = GetDeviceInfo( hostApi, inputParameters->device );
+ numHostInputChannels = PA_MAX( inputParameters->channelCount, devInfo->minInputChannels );
+ }
+ if( stream->playback.pcm )
+ {
+ const PaAlsaDeviceInfo *devInfo = GetDeviceInfo( hostApi, outputParameters->device );
+ numHostOutputChannels = PA_MAX( outputParameters->channelCount, devInfo->minOutputChannels );
+ }
+
+ if( stream->capture.pcm && stream->playback.pcm )
+ {
+ snd_pcm_uframes_t desiredLatency, e;
+ snd_pcm_uframes_t minPeriodSize, minPlayback, minCapture, maxPeriodSize, maxPlayback, maxCapture,
+ optimalPeriodSize, periodSize;
+ int dir = 0;
+ unsigned int minPeriods = 2;
+
+ snd_pcm_t *pcm;
+ snd_pcm_hw_params_t *hwParamsPlayback, *hwParamsCapture;
+
+ snd_pcm_hw_params_alloca( &hwParamsPlayback );
+ snd_pcm_hw_params_alloca( &hwParamsCapture );
+
+ /* Come up with a common desired latency */
+ pcm = stream->playback.pcm;
+ snd_pcm_hw_params_any( pcm, hwParamsPlayback );
+ ENSURE_( SetApproximateSampleRate( pcm, hwParamsPlayback, sampleRate ), paInvalidSampleRate );
+ ENSURE_( snd_pcm_hw_params_set_channels( pcm, hwParamsPlayback, numHostOutputChannels ),
+ paBadIODeviceCombination );
+
+ ENSURE_( snd_pcm_hw_params_set_period_size_integer( pcm, hwParamsPlayback ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_periods_integer( pcm, hwParamsPlayback ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_periods_min( pcm, hwParamsPlayback, &minPeriods, &dir ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_get_period_size_min( hwParamsPlayback, &minPlayback, &dir ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_get_period_size_max( hwParamsPlayback, &maxPlayback, &dir ), paUnanticipatedHostError );
+
+ pcm = stream->capture.pcm;
+ ENSURE_( snd_pcm_hw_params_any( pcm, hwParamsCapture ), paUnanticipatedHostError );
+ ENSURE_( SetApproximateSampleRate( pcm, hwParamsCapture, sampleRate ), paBadIODeviceCombination );
+ ENSURE_( snd_pcm_hw_params_set_channels( pcm, hwParamsCapture, numHostInputChannels ),
+ paBadIODeviceCombination );
+
+ ENSURE_( snd_pcm_hw_params_set_period_size_integer( pcm, hwParamsCapture ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_periods_integer( pcm, hwParamsCapture ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_periods_min( pcm, hwParamsCapture, &minPeriods, &dir ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_get_period_size_min( hwParamsCapture, &minCapture, &dir ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_get_period_size_max( hwParamsCapture, &maxCapture, &dir ), paUnanticipatedHostError );
+
+ minPeriodSize = PA_MAX( minPlayback, minCapture );
+ maxPeriodSize = PA_MIN( maxPlayback, maxCapture );
+
+ desiredLatency = (snd_pcm_uframes_t) (PA_MIN( outputParameters->suggestedLatency, inputParameters->suggestedLatency )
+ * sampleRate);
+ /* Clamp desiredLatency */
+ {
+ snd_pcm_uframes_t tmp, maxBufferSize = ULONG_MAX;
+ ENSURE_( snd_pcm_hw_params_get_buffer_size_max( hwParamsPlayback, &maxBufferSize ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_get_buffer_size_max( hwParamsCapture, &tmp ), paUnanticipatedHostError );
+ maxBufferSize = PA_MIN( maxBufferSize, tmp );
+
+ desiredLatency = PA_MIN( desiredLatency, maxBufferSize );
+ }
+
+ /* Find the closest power of 2 */
+ e = ilogb( minPeriodSize );
+ if( minPeriodSize & (minPeriodSize - 1) )
+ e += 1;
+ periodSize = (snd_pcm_uframes_t) pow( 2, e );
+
+ while( periodSize <= maxPeriodSize )
+ {
+ if( snd_pcm_hw_params_test_period_size( stream->playback.pcm, hwParamsPlayback, periodSize, 0 ) >= 0 &&
+ snd_pcm_hw_params_test_period_size( stream->capture.pcm, hwParamsCapture, periodSize, 0 ) >= 0 )
+ break; /* Ok! */
+
+ periodSize *= 2;
+ }
+
+ /* 4 periods considered optimal */
+ optimalPeriodSize = PA_MAX( desiredLatency / 4, minPeriodSize );
+ optimalPeriodSize = PA_MIN( optimalPeriodSize, maxPeriodSize );
+
+ /* Find the closest power of 2 */
+ e = ilogb( optimalPeriodSize );
+ if( optimalPeriodSize & (optimalPeriodSize - 1) )
+ e += 1;
+ optimalPeriodSize = (snd_pcm_uframes_t) pow( 2, e );
+
+ while( optimalPeriodSize >= periodSize )
+ {
+ pcm = stream->playback.pcm;
+ if( snd_pcm_hw_params_test_period_size( pcm, hwParamsPlayback, optimalPeriodSize, 0 ) < 0 )
+ continue;
+
+ pcm = stream->capture.pcm;
+ if( snd_pcm_hw_params_test_period_size( pcm, hwParamsCapture, optimalPeriodSize, 0 ) >= 0 )
+ break;
+
+ optimalPeriodSize /= 2;
+ }
+
+ if( optimalPeriodSize > periodSize )
+ periodSize = optimalPeriodSize;
+
+ if( periodSize <= maxPeriodSize )
+ {
+ /* Looks good */
+ framesPerBuffer = periodSize;
+ }
+ else
+ {
+ /* Unable to find a common period size, oh well */
+ optimalPeriodSize = PA_MAX( desiredLatency / 4, minPeriodSize );
+ optimalPeriodSize = PA_MIN( optimalPeriodSize, maxPeriodSize );
+
+ /* PaAlsaStream_Configure should find individual period sizes acceptable for each device */
+ framesPerBuffer = optimalPeriodSize;
+ /* PA_ENSURE( paBadIODeviceCombination ); */
+ }
+ }
+ else /* half-duplex is a slightly simpler case */
+ {
+ unsigned long bufferSize, channels;
+ snd_pcm_t *pcm;
+ snd_pcm_hw_params_t *hwParams;
+
+ snd_pcm_hw_params_alloca( &hwParams );
+
+ if( stream->capture.pcm )
+ {
+ pcm = stream->capture.pcm;
+ bufferSize = inputParameters->suggestedLatency * sampleRate;
+ channels = numHostInputChannels;
+ }
+ else
+ {
+ pcm = stream->playback.pcm;
+ bufferSize = outputParameters->suggestedLatency * sampleRate;
+ channels = numHostOutputChannels;
+ }
+
+ ENSURE_( snd_pcm_hw_params_any( pcm, hwParams ), paUnanticipatedHostError );
+ ENSURE_( SetApproximateSampleRate( pcm, hwParams, sampleRate ), paInvalidSampleRate );
+ ENSURE_( snd_pcm_hw_params_set_channels( pcm, hwParams, channels ), paBadIODeviceCombination );
+
+ ENSURE_( snd_pcm_hw_params_set_period_size_integer( pcm, hwParams ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_periods_integer( pcm, hwParams ), paUnanticipatedHostError );
+
+ /* Using 5 as a base number of periods, we try to approximate the suggested latency (+1 period),
+ finding a combination of period/buffer size which best fits these constraints */
+ framesPerBuffer = bufferSize / 4;
+ bufferSize += framesPerBuffer; /* One period doesn't count as latency */
+ ENSURE_( snd_pcm_hw_params_set_buffer_size_near( pcm, hwParams, &bufferSize ), paUnanticipatedHostError );
+ ENSURE_( snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &framesPerBuffer, NULL ), paUnanticipatedHostError );
+ }
+
+ PA_UNLESS( framesPerBuffer != 0, paInternalError );
+ *determinedFrames = framesPerBuffer;
+
+error:
+ return result;
+}
+
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *callback,
+ void *userData )
+{
+ PaError result = paNoError;
+ PaAlsaHostApiRepresentation *alsaHostApi = (PaAlsaHostApiRepresentation*)hostApi;
+ PaAlsaStream *stream = NULL;
+ PaSampleFormat hostInputSampleFormat = 0, hostOutputSampleFormat = 0;
+ PaSampleFormat inputSampleFormat = 0, outputSampleFormat = 0;
+ int numInputChannels = 0, numOutputChannels = 0;
+ PaTime inputLatency, outputLatency;
+ unsigned long framesPerHostBuffer;
+ PaUtilHostBufferSizeMode hostBufferSizeMode = paUtilBoundedHostBufferSize;
+ unsigned long maxHostBufferSize; /* Upper bound of host buffer size */
+
+ if( (streamFlags & paPlatformSpecificFlags) != 0 )
+ return paInvalidFlag;
+
+ if( inputParameters )
+ {
+ PA_ENSURE( ValidateParameters( inputParameters, hostApi, StreamDirection_In ) );
+
+ numInputChannels = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+ }
+ if( outputParameters )
+ {
+ PA_ENSURE( ValidateParameters( outputParameters, hostApi, StreamDirection_Out ) );
+
+ numOutputChannels = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+ }
+
+ /* XXX: Why do we support this anyway? */
+ if( framesPerBuffer == paFramesPerBufferUnspecified && getenv( "PA_ALSA_PERIODSIZE" ) != NULL )
+ {
+ PA_DEBUG(( "%s: Getting framesPerBuffer from environment\n", __FUNCTION__ ));
+ framesPerBuffer = atoi( getenv("PA_ALSA_PERIODSIZE") );
+ }
+ framesPerHostBuffer = framesPerBuffer;
+
+ PA_UNLESS( stream = (PaAlsaStream*)PaUtil_AllocateMemory( sizeof(PaAlsaStream) ), paInsufficientMemory );
+ PA_ENSURE( PaAlsaStream_Initialize( stream, alsaHostApi, inputParameters, outputParameters, sampleRate,
+ framesPerBuffer, callback, streamFlags, userData ) );
+
+ /* If the number of frames per buffer is unspecified, we have to come up with
+ * one. This is both a blessing and a curse: a blessing because we can optimize
+ * the number to best meet the requirements, but a curse because that's really
+ * hard to do well. For this reason we also support an interface where the user
+ * specifies these by setting environment variables. */
+ if( framesPerBuffer == paFramesPerBufferUnspecified )
+ {
+ PA_ENSURE( DetermineFramesPerBuffer( stream, sampleRate, inputParameters, outputParameters, &framesPerHostBuffer,
+ hostApi ) );
+ }
+
+ PA_ENSURE( PaAlsaStream_Configure( stream, inputParameters, outputParameters, sampleRate, framesPerHostBuffer,
+ &inputLatency, &outputLatency, &maxHostBufferSize ) );
+ hostInputSampleFormat = stream->capture.hostSampleFormat;
+ hostOutputSampleFormat = stream->playback.hostSampleFormat;
+
+ if( framesPerHostBuffer != framesPerBuffer )
+ {
+ PA_DEBUG(( "%s: Number of frames per user and host buffer differs\n", __FUNCTION__ ));
+ }
+
+ PA_ENSURE( PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
+ numInputChannels, inputSampleFormat, hostInputSampleFormat,
+ numOutputChannels, outputSampleFormat, hostOutputSampleFormat,
+ sampleRate, streamFlags, framesPerBuffer, maxHostBufferSize,
+ hostBufferSizeMode, callback, userData ) );
+
+ /* Ok, buffer processor is initialized, now we can deduce it's latency */
+ if( numInputChannels > 0 )
+ stream->streamRepresentation.streamInfo.inputLatency = inputLatency + PaUtil_GetBufferProcessorInputLatency(
+ &stream->bufferProcessor );
+ if( numOutputChannels > 0 )
+ stream->streamRepresentation.streamInfo.outputLatency = outputLatency + PaUtil_GetBufferProcessorOutputLatency(
+ &stream->bufferProcessor );
+
+ *s = (PaStream*)stream;
+
+ return result;
+
+error:
+ if( stream )
+ {
+ PA_DEBUG(( "\nStream in error, terminating\n\n" ));
+ PaAlsaStream_Terminate( stream );
+ }
+
+ return result;
+}
+
+static PaError CloseStream( PaStream* s )
+{
+ PaError result = paNoError;
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+
+ PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
+ PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
+
+ PaAlsaStream_Terminate( stream );
+
+ return result;
+}
+
+static void SilenceBuffer( PaAlsaStream *stream )
+{
+ const snd_pcm_channel_area_t *areas;
+ snd_pcm_uframes_t frames = (snd_pcm_uframes_t)snd_pcm_avail_update( stream->playback.pcm ), offset;
+
+ snd_pcm_mmap_begin( stream->playback.pcm, &areas, &offset, &frames );
+ snd_pcm_areas_silence( areas, offset, stream->playback.numHostChannels, frames, stream->playback.nativeFormat );
+ snd_pcm_mmap_commit( stream->playback.pcm, offset, frames );
+}
+
+/** Start/prepare pcm(s) for streaming.
+ *
+ * Depending on wether the stream is in callback or blocking mode, we will respectively start or simply
+ * prepare the playback pcm. If the buffer has _not_ been primed, we will in callback mode prepare and
+ * silence the buffer before starting playback. In blocking mode we simply prepare, as the playback will
+ * be started automatically as the user writes to output.
+ *
+ * The capture pcm, however, will simply be prepared and started.
+ *
+ * PaAlsaStream::startMtx makes sure access is synchronized (useful in callback mode)
+ */
+static PaError AlsaStart( PaAlsaStream *stream, int priming )
+{
+ PaError result = paNoError;
+
+ if( stream->playback.pcm )
+ {
+ if( stream->callbackMode )
+ {
+ if( !priming )
+ {
+ /* Buffer isn't primed, so prepare and silence */
+ ENSURE_( snd_pcm_prepare( stream->playback.pcm ), paUnanticipatedHostError );
+ SilenceBuffer( stream );
+ }
+ ENSURE_( snd_pcm_start( stream->playback.pcm ), paUnanticipatedHostError );
+ }
+ else
+ ENSURE_( snd_pcm_prepare( stream->playback.pcm ), paUnanticipatedHostError );
+ }
+ if( stream->capture.pcm && !stream->pcmsSynced )
+ {
+ ENSURE_( snd_pcm_prepare( stream->capture.pcm ), paUnanticipatedHostError );
+ /* For a blocking stream we want to start capture as well, since nothing will happen otherwise */
+ ENSURE_( snd_pcm_start( stream->capture.pcm ), paUnanticipatedHostError );
+ }
+
+end:
+ return result;
+error:
+ goto end;
+}
+
+/** Utility function for determining if pcms are in running state.
+ *
+ */
+static int IsRunning( PaAlsaStream *stream )
+{
+ int result = 0;
+
+ LockMutex( &stream->stateMtx );
+ if( stream->capture.pcm )
+ {
+ snd_pcm_state_t capture_state = snd_pcm_state( stream->capture.pcm );
+
+ if( capture_state == SND_PCM_STATE_RUNNING || capture_state == SND_PCM_STATE_XRUN
+ || capture_state == SND_PCM_STATE_DRAINING )
+ {
+ result = 1;
+ goto end;
+ }
+ }
+
+ if( stream->playback.pcm )
+ {
+ snd_pcm_state_t playback_state = snd_pcm_state( stream->playback.pcm );
+
+ if( playback_state == SND_PCM_STATE_RUNNING || playback_state == SND_PCM_STATE_XRUN
+ || playback_state == SND_PCM_STATE_DRAINING )
+ {
+ result = 1;
+ goto end;
+ }
+ }
+
+end:
+ ASSERT_CALL_( UnlockMutex( &stream->stateMtx ), paNoError );
+
+ return result;
+}
+
+static PaError StartStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+ int streamStarted = 0; /* So we can know wether we need to take the stream down */
+
+ /* Ready the processor */
+ PaUtil_ResetBufferProcessor( &stream->bufferProcessor );
+
+ /* Set now, so we can test for activity further down */
+ stream->isActive = 1;
+
+ if( stream->callbackMode )
+ {
+ int res = 0;
+ PaTime pt = PaUtil_GetTime();
+ struct timespec ts;
+
+ PA_ENSURE( CreateCallbackThread( &stream->threading, &CallbackThreadFunc, stream ) );
+ streamStarted = 1;
+
+ /* Wait for stream to be started */
+ ts.tv_sec = (time_t) floor( pt + 1 );
+ ts.tv_nsec = (long) ((pt - floor( pt )) * 1000000000);
+
+ /* Since we'll be holding a lock on the startMtx (when not waiting on the condition), IsRunning won't be checking
+ * stream state at the same time as the callback thread affects it. We also check IsStreamActive, in the unlikely
+ * case the callback thread exits in the meantime (the stream will be considered inactive after the thread exits) */
+ PA_ENSURE( LockMutex( &stream->startMtx ) );
+
+ /* Due to possible spurious wakeups, we enclose in a loop */
+ while( !IsRunning( stream ) && IsStreamActive( s ) && !res )
+ {
+ res = pthread_cond_timedwait( &stream->startCond, &stream->startMtx, &ts );
+ }
+ PA_ENSURE( UnlockMutex( &stream->startMtx ) );
+
+ PA_UNLESS( !res || res == ETIMEDOUT, paInternalError );
+ PA_DEBUG(( "%s: Waited for %g seconds for stream to start\n", __FUNCTION__, PaUtil_GetTime() - pt ));
+
+ if( res == ETIMEDOUT )
+ {
+ PA_ENSURE( paTimedOut );
+ }
+ }
+ else
+ {
+ PA_ENSURE( AlsaStart( stream, 0 ) );
+ streamStarted = 1;
+ }
+
+end:
+ return result;
+error:
+ if( streamStarted )
+ AbortStream( stream );
+ stream->isActive = 0;
+
+ goto end;
+}
+
+static PaError AlsaStop( PaAlsaStream *stream, int abort )
+{
+ PaError result = paNoError;
+
+ if( abort )
+ {
+ if( stream->playback.pcm )
+ ENSURE_( snd_pcm_drop( stream->playback.pcm ), paUnanticipatedHostError );
+ if( stream->capture.pcm && !stream->pcmsSynced )
+ ENSURE_( snd_pcm_drop( stream->capture.pcm ), paUnanticipatedHostError );
+
+ PA_DEBUG(( "Dropped frames\n" ));
+ }
+ else
+ {
+ if( stream->playback.pcm )
+ ENSURE_( snd_pcm_drain( stream->playback.pcm ), paUnanticipatedHostError );
+ if( stream->capture.pcm && !stream->pcmsSynced )
+ ENSURE_( snd_pcm_drain( stream->capture.pcm ), paUnanticipatedHostError );
+ }
+
+end:
+ return result;
+error:
+ goto end;
+}
+
+/** Stop or abort stream.
+ *
+ * If a stream is in callback mode we will have to inspect wether the background thread has
+ * finished, or we will have to take it out. In either case we join the thread before
+ * returning. In blocking mode, we simply tell ALSA to stop abruptly (abort) or finish
+ * buffers (drain)
+ *
+ * Stream will be considered inactive (!PaAlsaStream::isActive) after a call to this function
+ */
+static PaError RealStop( PaAlsaStream *stream, int abort )
+{
+ PaError result = paNoError;
+
+ /* First deal with the callback thread, cancelling and/or joining
+ * it if necessary
+ */
+ if( stream->callbackMode )
+ {
+ PaError threadRes, watchdogRes;
+ stream->callbackAbort = abort;
+
+ if( !abort )
+ {
+ PA_DEBUG(( "Stopping callback\n" ));
+ stream->callbackStop = 1;
+ }
+ PA_ENSURE( KillCallbackThread( &stream->threading, !abort, &threadRes, &watchdogRes ) );
+ if( threadRes != paNoError )
+ PA_DEBUG(( "Callback thread returned: %d\n", threadRes ));
+ if( watchdogRes != paNoError )
+ PA_DEBUG(( "Watchdog thread returned: %d\n", watchdogRes ));
+
+ stream->callbackStop = 0; /* The deed is done */
+ stream->callback_finished = 0;
+ }
+ else
+ {
+ PA_ENSURE( AlsaStop( stream, abort ) );
+ }
+
+ stream->isActive = 0;
+
+end:
+ return result;
+
+error:
+ goto end;
+}
+
+static PaError StopStream( PaStream *s )
+{
+ return RealStop( (PaAlsaStream *) s, 0 );
+}
+
+static PaError AbortStream( PaStream *s )
+{
+ return RealStop( (PaAlsaStream * ) s, 1 );
+}
+
+/** The stream is considered stopped before StartStream, or AFTER a call to Abort/StopStream (callback
+ * returning !paContinue is not considered)
+ *
+ */
+static PaError IsStreamStopped( PaStream *s )
+{
+ PaAlsaStream *stream = (PaAlsaStream *)s;
+
+ /* callback_finished indicates we need to join callback thread (ie. in Abort/StopStream) */
+ return !IsStreamActive( s ) && !stream->callback_finished;
+}
+
+static PaError IsStreamActive( PaStream *s )
+{
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+ return stream->isActive;
+}
+
+static PaTime GetStreamTime( PaStream *s )
+{
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+
+ snd_timestamp_t timestamp;
+ snd_pcm_status_t *status;
+ snd_pcm_status_alloca( &status );
+
+ /* TODO: what if we have both? does it really matter? */
+
+ /* TODO: if running in callback mode, this will mean
+ * libasound routines are being called from multiple threads.
+ * need to verify that libasound is thread-safe. */
+
+ if( stream->capture.pcm )
+ {
+ snd_pcm_status( stream->capture.pcm, status );
+ }
+ else if( stream->playback.pcm )
+ {
+ snd_pcm_status( stream->playback.pcm, status );
+ }
+
+ snd_pcm_status_get_tstamp( status, ×tamp );
+ return timestamp.tv_sec + (PaTime)timestamp.tv_usec / 1000000.0;
+}
+
+static double GetStreamCpuLoad( PaStream* s )
+{
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+
+ return PaUtil_GetCpuLoad( &stream->cpuLoadMeasurer );
+}
+
+static int SetApproximateSampleRate( snd_pcm_t *pcm, snd_pcm_hw_params_t *hwParams, double sampleRate )
+{
+ unsigned long approx = (unsigned long) sampleRate;
+ int dir = 0;
+ double fraction = sampleRate - approx;
+
+ assert( pcm && hwParams );
+
+ if( fraction > 0.0 )
+ {
+ if( fraction > 0.5 )
+ {
+ ++approx;
+ dir = -1;
+ }
+ else
+ dir = 1;
+ }
+
+ return snd_pcm_hw_params_set_rate( pcm, hwParams, approx, dir );
+}
+
+/* Return exact sample rate in param sampleRate */
+static int GetExactSampleRate( snd_pcm_hw_params_t *hwParams, double *sampleRate )
+{
+ unsigned int num, den;
+ int err;
+
+ assert( hwParams );
+
+ err = snd_pcm_hw_params_get_rate_numden( hwParams, &num, &den );
+ *sampleRate = (double) num / den;
+
+ return err;
+}
+
+/* Utility functions for blocking/callback interfaces */
+
+/* Atomic restart of stream (we don't want the intermediate state visible) */
+static PaError AlsaRestart( PaAlsaStream *stream )
+{
+ PaError result = paNoError;
+
+ PA_ENSURE( LockMutex( &stream->stateMtx ) );
+ PA_ENSURE( AlsaStop( stream, 0 ) );
+ PA_ENSURE( AlsaStart( stream, 0 ) );
+
+ PA_DEBUG(( "%s: Restarted audio\n", __FUNCTION__ ));
+
+error:
+ PA_ENSURE( UnlockMutex( &stream->stateMtx ) );
+
+ return result;
+}
+
+/** Recover from xrun state.
+ *
+ */
+static PaError PaAlsaStream_HandleXrun( PaAlsaStream *self )
+{
+ PaError result = paNoError;
+ snd_pcm_status_t *st;
+ PaTime now = PaUtil_GetTime();
+ snd_timestamp_t t;
+
+ snd_pcm_status_alloca( &st );
+
+ if( self->playback.pcm )
+ {
+ snd_pcm_status( self->playback.pcm, st );
+ if( snd_pcm_status_get_state( st ) == SND_PCM_STATE_XRUN )
+ {
+ snd_pcm_status_get_trigger_tstamp( st, &t );
+ self->underrun = now * 1000 - ((PaTime) t.tv_sec * 1000 + (PaTime) t.tv_usec / 1000);
+ }
+ }
+ if( self->capture.pcm )
+ {
+ snd_pcm_status( self->capture.pcm, st );
+ if( snd_pcm_status_get_state( st ) == SND_PCM_STATE_XRUN )
+ {
+ snd_pcm_status_get_trigger_tstamp( st, &t );
+ self->overrun = now * 1000 - ((PaTime) t.tv_sec * 1000 + (PaTime) t.tv_usec / 1000);
+ }
+ }
+
+ PA_ENSURE( AlsaRestart( self ) );
+
+end:
+ return result;
+error:
+ goto end;
+}
+
+/** Decide if we should continue polling for specified direction, eventually adjust the poll timeout.
+ *
+ */
+static PaError ContinuePoll( const PaAlsaStream *stream, StreamDirection streamDir, int *pollTimeout, int *continuePoll )
+{
+ PaError result = paNoError;
+ snd_pcm_sframes_t delay, margin;
+ int err;
+ const PaAlsaStreamComponent *component = NULL, *otherComponent = NULL;
+
+ *continuePoll = 1;
+
+ if( StreamDirection_In == streamDir )
+ {
+ component = &stream->capture;
+ otherComponent = &stream->playback;
+ }
+ else
+ {
+ component = &stream->playback;
+ otherComponent = &stream->capture;
+ }
+
+ /* ALSA docs say that negative delay should indicate xrun, but in my experience snd_pcm_delay returns -EPIPE */
+ if( (err = snd_pcm_delay( otherComponent->pcm, &delay )) < 0 )
+ {
+ if( err == -EPIPE )
+ {
+ /* Xrun */
+ *continuePoll = 0;
+ goto error;
+ }
+
+ ENSURE_( err, paUnanticipatedHostError );
+ }
+
+ if( StreamDirection_Out == streamDir )
+ {
+ /* Number of eligible frames before capture overrun */
+ delay = otherComponent->bufferSize - delay;
+ }
+ margin = delay - otherComponent->framesPerBuffer / 2;
+
+ if( margin < 0 )
+ {
+ PA_DEBUG(( "%s: Stopping poll for %s\n", __FUNCTION__, StreamDirection_In == streamDir ? "capture" : "playback" ));
+ *continuePoll = 0;
+ }
+ else if( margin < otherComponent->framesPerBuffer )
+ {
+ *pollTimeout = CalculatePollTimeout( stream, margin );
+ PA_DEBUG(( "%s: Trying to poll again for %s frames, pollTimeout: %d\n",
+ __FUNCTION__, StreamDirection_In == streamDir ? "capture" : "playback", *pollTimeout ));
+ }
+
+error:
+ return result;
+}
+
+/* Callback interface */
+
+static void OnExit( void *data )
+{
+ PaAlsaStream *stream = (PaAlsaStream *) data;
+
+ assert( data );
+
+ PaUtil_ResetCpuLoadMeasurer( &stream->cpuLoadMeasurer );
+
+ stream->callback_finished = 1; /* Let the outside world know stream was stopped in callback */
+ AlsaStop( stream, stream->callbackAbort );
+ stream->callbackAbort = 0; /* Clear state */
+
+ PA_DEBUG(( "OnExit: Stoppage\n" ));
+
+ /* Eventually notify user all buffers have played */
+ if( stream->streamRepresentation.streamFinishedCallback )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+ stream->isActive = 0;
+}
+
+static void CalculateTimeInfo( PaAlsaStream *stream, PaStreamCallbackTimeInfo *timeInfo )
+{
+ snd_pcm_status_t *capture_status, *playback_status;
+ snd_timestamp_t capture_timestamp, playback_timestamp;
+ PaTime capture_time = 0., playback_time = 0.;
+
+ snd_pcm_status_alloca( &capture_status );
+ snd_pcm_status_alloca( &playback_status );
+
+ if( stream->capture.pcm )
+ {
+ snd_pcm_sframes_t capture_delay;
+
+ snd_pcm_status( stream->capture.pcm, capture_status );
+ snd_pcm_status_get_tstamp( capture_status, &capture_timestamp );
+
+ capture_time = capture_timestamp.tv_sec +
+ ((PaTime)capture_timestamp.tv_usec / 1000000.0);
+ timeInfo->currentTime = capture_time;
+
+ capture_delay = snd_pcm_status_get_delay( capture_status );
+ timeInfo->inputBufferAdcTime = timeInfo->currentTime -
+ (PaTime)capture_delay / stream->streamRepresentation.streamInfo.sampleRate;
+ }
+ if( stream->playback.pcm )
+ {
+ snd_pcm_sframes_t playback_delay;
+
+ snd_pcm_status( stream->playback.pcm, playback_status );
+ snd_pcm_status_get_tstamp( playback_status, &playback_timestamp );
+
+ playback_time = playback_timestamp.tv_sec +
+ ((PaTime)playback_timestamp.tv_usec / 1000000.0);
+
+ if( stream->capture.pcm ) /* Full duplex */
+ {
+ /* Hmm, we have both a playback and a capture timestamp.
+ * Hopefully they are the same... */
+ if( fabs( capture_time - playback_time ) > 0.01 )
+ PA_DEBUG(("Capture time and playback time differ by %f\n", fabs(capture_time-playback_time)));
+ }
+ else
+ timeInfo->currentTime = playback_time;
+
+ playback_delay = snd_pcm_status_get_delay( playback_status );
+ timeInfo->outputBufferDacTime = timeInfo->currentTime +
+ (PaTime)playback_delay / stream->streamRepresentation.streamInfo.sampleRate;
+ }
+}
+
+/** Called after buffer processing is finished.
+ *
+ * A number of mmapped frames is committed, it is possible that an xrun has occurred in the meantime.
+ *
+ * @param numFrames The number of frames that has been processed
+ * @param xrun Return whether an xrun has occurred
+ */
+static PaError PaAlsaStreamComponent_EndProcessing( PaAlsaStreamComponent *self, unsigned long numFrames, int *xrun )
+{
+ PaError result = paNoError;
+ int res;
+
+ /* @concern FullDuplex It is possible that only one direction is marked ready after polling, and processed
+ * afterwards
+ */
+ if( !self->ready )
+ goto end;
+
+ res = snd_pcm_mmap_commit( self->pcm, self->offset, numFrames );
+ if( res == -EPIPE || res == -ESTRPIPE )
+ {
+ *xrun = 1;
+ }
+ else
+ {
+ ENSURE_( res, paUnanticipatedHostError );
+ }
+
+end:
+error:
+ return result;
+}
+
+/* Extract buffer from channel area */
+static unsigned char *ExtractAddress( const snd_pcm_channel_area_t *area, snd_pcm_uframes_t offset )
+{
+ return (unsigned char *) area->addr + (area->first + offset * area->step) / 8;
+}
+
+/** Do necessary adaption between user and host channels.
+ *
+ @concern ChannelAdaption Adapting between user and host channels can involve silencing unused channels and
+ duplicating mono information if host outputs come in pairs.
+ */
+static PaError PaAlsaStreamComponent_DoChannelAdaption( PaAlsaStreamComponent *self, PaUtilBufferProcessor *bp, int numFrames )
+{
+ PaError result = paNoError;
+ unsigned char *p;
+ int i;
+ int unusedChans = self->numHostChannels - self->numUserChannels;
+ unsigned char *src, *dst;
+ int convertMono = (self->numHostChannels % 2) == 0 && (self->numUserChannels % 2) != 0;
+
+ assert( StreamDirection_Out == self->streamDir );
+
+ if( self->hostInterleaved )
+ {
+ int swidth = snd_pcm_format_size( self->nativeFormat, 1 );
+ unsigned char *buffer = ExtractAddress( self->channelAreas, self->offset );
+
+ /* Start after the last user channel */
+ p = buffer + self->numUserChannels * swidth;
+
+ if( convertMono )
+ {
+ /* Convert the last user channel into stereo pair */
+ src = buffer + (self->numUserChannels - 1) * swidth;
+ for( i = 0; i < numFrames; ++i )
+ {
+ dst = src + swidth;
+ memcpy( dst, src, swidth );
+ src += self->numHostChannels * swidth;
+ }
+
+ /* Don't touch the channel we just wrote to */
+ p += swidth;
+ --unusedChans;
+ }
+
+ if( unusedChans > 0 )
+ {
+ /* Silence unused output channels */
+ for( i = 0; i < numFrames; ++i )
+ {
+ memset( p, 0, swidth * unusedChans );
+ p += self->numHostChannels * swidth;
+ }
+ }
+ }
+ else
+ {
+ /* We extract the last user channel */
+ if( convertMono )
+ {
+ ENSURE_( snd_pcm_area_copy( self->channelAreas + self->numUserChannels, self->offset, self->channelAreas +
+ (self->numUserChannels - 1), self->offset, numFrames, self->nativeFormat ), paUnanticipatedHostError );
+ --unusedChans;
+ }
+ if( unusedChans > 0 )
+ {
+ snd_pcm_areas_silence( self->channelAreas + (self->numHostChannels - unusedChans), self->offset, unusedChans, numFrames,
+ self->nativeFormat );
+ }
+ }
+
+error:
+ return result;
+}
+
+static PaError PaAlsaStream_EndProcessing( PaAlsaStream *self, unsigned long numFrames, int *xrunOccurred )
+{
+ PaError result = paNoError;
+ int xrun = 0;
+
+ if( self->capture.pcm )
+ {
+ PA_ENSURE( PaAlsaStreamComponent_EndProcessing( &self->capture, numFrames, &xrun ) );
+ }
+ if( self->playback.pcm )
+ {
+ if( self->playback.numHostChannels > self->playback.numUserChannels )
+ PA_ENSURE( PaAlsaStreamComponent_DoChannelAdaption( &self->playback, &self->bufferProcessor, numFrames ) );
+ PA_ENSURE( PaAlsaStreamComponent_EndProcessing( &self->playback, numFrames, &xrun ) );
+ }
+
+error:
+ *xrunOccurred = xrun;
+ return result;
+}
+
+/** Update the number of available frames.
+ *
+ */
+static PaError PaAlsaStreamComponent_GetAvailableFrames( PaAlsaStreamComponent *self, unsigned long *numFrames, int *xrunOccurred )
+{
+ PaError result = paNoError;
+ snd_pcm_sframes_t framesAvail = snd_pcm_avail_update( self->pcm );
+ *xrunOccurred = 0;
+
+ if( -EPIPE == framesAvail )
+ {
+ *xrunOccurred = 1;
+ framesAvail = 0;
+ }
+ else
+ ENSURE_( framesAvail, paUnanticipatedHostError );
+
+ *numFrames = framesAvail;
+
+error:
+ return result;
+}
+
+/** Fill in pollfd objects.
+ */
+static PaError PaAlsaStreamComponent_BeginPolling( PaAlsaStreamComponent *self, struct pollfd *pfds )
+{
+ PaError result = paNoError;
+ int ret = snd_pcm_poll_descriptors( self->pcm, pfds, self->nfds );
+ assert( ret == self->nfds );
+
+ self->ready = 0;
+
+ return result;
+}
+
+/** Examine results from poll().
+ *
+ * @param pfds pollfds to inspect
+ * @param shouldPoll Should we continue to poll
+ * @param xrun Has an xrun occurred
+ */
+static PaError PaAlsaStreamComponent_EndPolling( PaAlsaStreamComponent *self, struct pollfd *pfds, int *shouldPoll, int *xrun )
+{
+ PaError result = paNoError;
+ unsigned short revents;
+
+ ENSURE_( snd_pcm_poll_descriptors_revents( self->pcm, pfds, self->nfds, &revents ), paUnanticipatedHostError );
+ if( revents != 0 )
+ {
+ if( revents & POLLERR )
+ {
+ *xrun = 1;
+ }
+ else
+ self->ready = 1;
+
+ *shouldPoll = 0;
+ }
+
+error:
+ return result;
+}
+
+/** Return the number of available frames for this stream.
+ *
+ * @concern FullDuplex The minimum available for the two directions is calculated, it might be desirable to ignore
+ * one direction however (not marked ready from poll), so this is controlled by queryCapture and queryPlayback.
+ *
+ * @param queryCapture Check available for capture
+ * @param queryPlayback Check available for playback
+ * @param available The returned number of frames
+ * @param xrunOccurred Return whether an xrun has occurred
+ */
+static PaError PaAlsaStream_GetAvailableFrames( PaAlsaStream *self, int queryCapture, int queryPlayback, unsigned long
+ *available, int *xrunOccurred )
+{
+ PaError result = paNoError;
+ unsigned long captureFrames, playbackFrames;
+ *xrunOccurred = 0;
+
+ assert( queryCapture || queryPlayback );
+
+ if( queryCapture )
+ {
+ assert( self->capture.pcm );
+ PA_ENSURE( PaAlsaStreamComponent_GetAvailableFrames( &self->capture, &captureFrames, xrunOccurred ) );
+ if( *xrunOccurred )
+ goto end;
+ }
+ if( queryPlayback )
+ {
+ assert( self->playback.pcm );
+ PA_ENSURE( PaAlsaStreamComponent_GetAvailableFrames( &self->playback, &playbackFrames, xrunOccurred ) );
+ if( *xrunOccurred )
+ goto end;
+ }
+
+ if( queryCapture && queryPlayback )
+ {
+ *available = PA_MIN( captureFrames, playbackFrames );
+ /*PA_DEBUG(("capture: %lu, playback: %lu, combined: %lu\n", captureFrames, playbackFrames, *available));*/
+ }
+ else if( queryCapture )
+ {
+ *available = captureFrames;
+ }
+ else
+ {
+ *available = playbackFrames;
+ }
+
+end:
+error:
+ return result;
+}
+
+/** Wait for and report available buffer space from ALSA.
+ *
+ * Unless ALSA reports a minimum of frames available for I/O, we poll the ALSA filedescriptors for more.
+ * Both of these operations can uncover xrun conditions.
+ *
+ * @concern Xruns Both polling and querying available frames can report an xrun condition.
+ *
+ * @param framesAvail Return the number of available frames
+ * @param xrunOccurred Return whether an xrun has occurred
+ */
+static PaError PaAlsaStream_WaitForFrames( PaAlsaStream *self, unsigned long *framesAvail, int *xrunOccurred )
+{
+ PaError result = paNoError;
+ int pollPlayback = self->playback.pcm != NULL, pollCapture = self->capture.pcm != NULL;
+ int pollTimeout = self->pollTimeout;
+ int xrun = 0;
+
+ assert( self );
+ assert( framesAvail );
+
+ if( !self->callbackMode )
+ {
+ /* In blocking mode we will only wait if necessary */
+ PA_ENSURE( PaAlsaStream_GetAvailableFrames( self, self->capture.pcm != NULL, self->playback.pcm != NULL,
+ framesAvail, &xrun ) );
+ if( xrun )
+ {
+ goto end;
+ }
+
+ if( *framesAvail > 0 )
+ {
+ /* Mark pcms ready from poll */
+ if( self->capture.pcm )
+ self->capture.ready = 1;
+ if( self->playback.pcm )
+ self->playback.ready = 1;
+
+ goto end;
+ }
+ }
+
+ while( pollPlayback || pollCapture )
+ {
+ int totalFds = 0;
+ struct pollfd *capturePfds = NULL, *playbackPfds = NULL;
+
+ pthread_testcancel();
+
+ if( pollCapture )
+ {
+ capturePfds = self->pfds;
+ PA_ENSURE( PaAlsaStreamComponent_BeginPolling( &self->capture, capturePfds ) );
+ totalFds += self->capture.nfds;
+ }
+ if( pollPlayback )
+ {
+ playbackPfds = self->pfds + (self->capture.pcm ? self->capture.nfds : 0);
+ PA_ENSURE( PaAlsaStreamComponent_BeginPolling( &self->playback, playbackPfds ) );
+ totalFds += self->playback.nfds;
+ }
+
+ if( poll( self->pfds, totalFds, pollTimeout ) < 0 )
+ {
+ /* XXX: Depend on preprocessor condition? */
+ if( errno == EINTR ) { /* gdb */
+ continue;
+ }
+
+ /* TODO: Add macro for checking system calls */
+ PA_ENSURE( paInternalError );
+ }
+
+ /* check the return status of our pfds */
+ if( pollCapture )
+ {
+ PA_ENSURE( PaAlsaStreamComponent_EndPolling( &self->capture, capturePfds, &pollCapture, &xrun ) );
+ }
+ if( pollPlayback )
+ {
+ PA_ENSURE( PaAlsaStreamComponent_EndPolling( &self->playback, playbackPfds, &pollPlayback, &xrun ) );
+ }
+ if( xrun )
+ {
+ break;
+ }
+
+ /* @concern FullDuplex If only one of two pcms is ready we may want to compromise between the two.
+ * If there is less than half a period's worth of samples left of frames in the other pcm's buffer we will
+ * stop polling.
+ */
+ if( self->capture.pcm && self->playback.pcm )
+ {
+ if( pollCapture && !pollPlayback )
+ {
+ PA_ENSURE( ContinuePoll( self, StreamDirection_In, &pollTimeout, &pollCapture ) );
+ }
+ else if( pollPlayback && !pollCapture )
+ {
+ PA_ENSURE( ContinuePoll( self, StreamDirection_Out, &pollTimeout, &pollPlayback ) );
+ }
+ }
+ }
+
+ if( !xrun )
+ {
+ /* Get the number of available frames for the pcms that are marked ready.
+ * @concern FullDuplex If only one direction is marked ready (from poll), the number of frames available for
+ * the other direction is returned. Output is normally preferred over capture however, so capture frames may be
+ * discarded to avoid overrun unless paNeverDropInput is specified.
+ */
+ int captureReady = self->capture.pcm ? self->capture.ready : 0,
+ playbackReady = self->playback.pcm ? self->playback.ready : 0;
+ PA_ENSURE( PaAlsaStream_GetAvailableFrames( self, captureReady, playbackReady, framesAvail, &xrun ) );
+
+ if( self->capture.pcm && self->playback.pcm )
+ {
+ if( !self->playback.ready && !self->neverDropInput )
+ {
+ /* Drop input, a period's worth */
+ assert( self->capture.ready );
+ PaAlsaStreamComponent_EndProcessing( &self->capture, PA_MIN( self->capture.framesPerBuffer,
+ *framesAvail ), &xrun );
+ *framesAvail = 0;
+ self->capture.ready = 0;
+ }
+ }
+ else if( self->capture.pcm )
+ assert( self->capture.ready );
+ else
+ assert( self->playback.ready );
+ }
+
+end:
+error:
+ if( xrun )
+ {
+ /* Recover from the xrun state */
+ PA_ENSURE( PaAlsaStream_HandleXrun( self ) );
+ *framesAvail = 0;
+ }
+ else
+ {
+ PA_UNLESS( self->capture.ready || self->playback.ready, paInternalError );
+ }
+ *xrunOccurred = xrun;
+
+ return result;
+}
+
+/** Register per-channel ALSA buffer information with buffer processor.
+ *
+ * Mmapped buffer space is acquired from ALSA, and registered with the buffer processor. Differences between the
+ * number of host and user channels is taken into account.
+ *
+ * @param numFrames On entrance the number of requested frames, on exit the number of contiguously accessible frames.
+ */
+static PaError PaAlsaStreamComponent_RegisterChannels( PaAlsaStreamComponent *self, PaUtilBufferProcessor *bp,
+ unsigned long *numFrames, int *xrun )
+{
+ PaError result = paNoError;
+ const snd_pcm_channel_area_t *areas, *area;
+ void (*setChannel)(PaUtilBufferProcessor *, unsigned int, void *, unsigned int) =
+ StreamDirection_In == self->streamDir ? PaUtil_SetInputChannel : PaUtil_SetOutputChannel;
+ unsigned char *buffer, *p;
+ int i;
+ unsigned long framesAvail;
+
+ /* This _must_ be called before mmap_begin */
+ PA_ENSURE( PaAlsaStreamComponent_GetAvailableFrames( self, &framesAvail, xrun ) );
+ if( *xrun )
+ {
+ *numFrames = 0;
+ goto end;
+ }
+
+ ENSURE_( snd_pcm_mmap_begin( self->pcm, &areas, &self->offset, numFrames ), paUnanticipatedHostError );
+
+ if( self->hostInterleaved )
+ {
+ int swidth = snd_pcm_format_size( self->nativeFormat, 1 );
+
+ p = buffer = ExtractAddress( areas, self->offset );
+ for( i = 0; i < self->numUserChannels; ++i )
+ {
+ /* We're setting the channels up to userChannels, but the stride will be hostChannels samples */
+ setChannel( bp, i, p, self->numHostChannels );
+ p += swidth;
+ }
+ }
+ else
+ {
+ for( i = 0; i < self->numUserChannels; ++i )
+ {
+ area = areas + i;
+ buffer = ExtractAddress( area, self->offset );
+ setChannel( bp, i, buffer, 1 );
+ }
+ }
+
+ /* @concern ChannelAdaption Buffer address is recorded so we can do some channel adaption later */
+ self->channelAreas = (snd_pcm_channel_area_t *)areas;
+
+end:
+error:
+ return result;
+}
+
+/** Initiate buffer processing.
+ *
+ * ALSA buffers are registered with the PA buffer processor and the buffer size (in frames) set.
+ *
+ * @concern FullDuplex If both directions are being processed, the minimum amount of frames for the two directions is
+ * calculated.
+ *
+ * @param numFrames On entrance the number of available frames, on exit the number of received frames
+ * @param xrunOccurred Return whether an xrun has occurred
+ */
+static PaError PaAlsaStream_SetUpBuffers( PaAlsaStream *self, unsigned long *numFrames, int *xrunOccurred )
+{
+ PaError result = paNoError;
+ unsigned long captureFrames = ULONG_MAX, playbackFrames = ULONG_MAX, commonFrames = 0;
+ int xrun = 0;
+
+ if( *xrunOccurred )
+ {
+ *numFrames = 0;
+ return result;
+ }
+ /* If we got here at least one of the pcm's should be marked ready */
+ PA_UNLESS( self->capture.ready || self->playback.ready, paInternalError );
+
+ /* Extract per-channel ALSA buffer pointers and register them with the buffer processor.
+ * It is possible that a direction is not marked ready however, because it is out of sync with the other.
+ */
+ if( self->capture.pcm && self->capture.ready )
+ {
+ captureFrames = *numFrames;
+ PA_ENSURE( PaAlsaStreamComponent_RegisterChannels( &self->capture, &self->bufferProcessor, &captureFrames,
+ &xrun ) );
+ }
+ if( self->playback.pcm && self->playback.ready )
+ {
+ playbackFrames = *numFrames;
+ PA_ENSURE( PaAlsaStreamComponent_RegisterChannels( &self->playback, &self->bufferProcessor, &playbackFrames,
+ &xrun ) );
+ }
+ if( xrun )
+ {
+ /* Nothing more to do */
+ assert( 0 == commonFrames );
+ goto end;
+ }
+
+ commonFrames = PA_MIN( captureFrames, playbackFrames );
+ /* assert( commonFrames <= *numFrames ); */
+ if( commonFrames > *numFrames )
+ {
+ /* Hmmm ... how come there are more frames available than we requested!? Blah. */
+ PA_DEBUG(( "%s: Common available frames are reported to be more than number requested: %lu, %lu, callbackMode: %d\n", __FUNCTION__,
+ commonFrames, *numFrames, self->callbackMode ));
+ if( self->capture.pcm )
+ {
+ PA_DEBUG(( "%s: captureFrames: %lu, capture.ready: %d\n", __FUNCTION__, captureFrames, self->capture.ready ));
+ }
+ if( self->playback.pcm )
+ {
+ PA_DEBUG(( "%s: playbackFrames: %lu, playback.ready: %d\n", __FUNCTION__, playbackFrames, self->playback.ready ));
+ }
+
+ commonFrames = 0;
+ goto end;
+ }
+
+ /* Inform PortAudio of the number of frames we got.
+ * @concern FullDuplex We might be experiencing underflow in either end; if its an input underflow, we go on
+ * with output. If its output underflow however, depending on the paNeverDropInput flag, we may want to simply
+ * discard the excess input or call the callback with paOutputOverflow flagged.
+ */
+ if( self->capture.pcm )
+ {
+ if( self->capture.ready )
+ {
+ PaUtil_SetInputFrameCount( &self->bufferProcessor, commonFrames );
+ }
+ else
+ {
+ /* We have input underflow */
+ PaUtil_SetNoInput( &self->bufferProcessor );
+ }
+ }
+ if( self->playback.pcm )
+ {
+ if( self->playback.ready )
+ {
+ PaUtil_SetOutputFrameCount( &self->bufferProcessor, commonFrames );
+ }
+ else
+ {
+ /* We have output underflow, but keeping input data (paNeverDropInput) */
+ assert( self->neverDropInput );
+ assert( self->capture.pcm != NULL );
+ PA_DEBUG(( "%s: Setting output buffers to NULL\n", __FUNCTION__ ));
+ PaUtil_SetNoOutput( &self->bufferProcessor );
+ }
+ }
+
+end:
+ *numFrames = commonFrames;
+error:
+ if( xrun )
+ {
+ PA_ENSURE( PaAlsaStream_HandleXrun( self ) );
+ *numFrames = 0;
+ }
+ *xrunOccurred = xrun;
+
+ return result;
+}
+
+/** Callback thread's function.
+ *
+ * Roughly, the workflow can be described in the following way: The number of available frames that can be processed
+ * directly is obtained from ALSA, we then request as much directly accessible memory as possible within this amount
+ * from ALSA. The buffer memory is registered with the PA buffer processor and processing is carried out with
+ * PaUtil_EndBufferProcessing. Finally, the number of processed frames is reported to ALSA. The processing can
+ * happen in several iterations untill we have consumed the known number of available frames (or an xrun is detected).
+ */
+static void *CallbackThreadFunc( void *userData )
+{
+ PaError result = paNoError, *pres = NULL;
+ PaAlsaStream *stream = (PaAlsaStream*) userData;
+ PaStreamCallbackTimeInfo timeInfo = {0, 0, 0};
+ snd_pcm_sframes_t startThreshold = 0;
+ int callbackResult = paContinue;
+ PaStreamCallbackFlags cbFlags = 0; /* We might want to keep state across iterations */
+ int streamStarted = 0;
+
+ assert( stream );
+
+ callbackThread_ = pthread_self();
+ /* Execute OnExit when exiting */
+ pthread_cleanup_push( &OnExit, stream );
+
+ /* Not implemented */
+ assert( !stream->primeBuffers );
+
+ /* @concern StreamStart If the output is being primed the output pcm needs to be prepared, otherwise the
+ * stream is started immediately. The latter involves signaling the waiting main thread.
+ */
+ if( stream->primeBuffers )
+ {
+ snd_pcm_sframes_t avail;
+
+ if( stream->playback.pcm )
+ ENSURE_( snd_pcm_prepare( stream->playback.pcm ), paUnanticipatedHostError );
+ if( stream->capture.pcm && !stream->pcmsSynced )
+ ENSURE_( snd_pcm_prepare( stream->capture.pcm ), paUnanticipatedHostError );
+
+ /* We can't be certain that the whole ring buffer is available for priming, but there should be
+ * at least one period */
+ avail = snd_pcm_avail_update( stream->playback.pcm );
+ startThreshold = avail - (avail % stream->playback.framesPerBuffer);
+ assert( startThreshold >= stream->playback.framesPerBuffer );
+ }
+ else
+ {
+ PA_ENSURE( LockMutex( &stream->startMtx ) );
+ PA_ENSURE( AlsaStart( stream, 0 ) ); /* Buffer will be zeroed */
+ ENSURE_SYSTEM_( pthread_cond_signal( &stream->startCond ), 0 );
+ PA_ENSURE( UnlockMutex( &stream->startMtx ) );
+
+ streamStarted = 1;
+ }
+
+ while( 1 )
+ {
+ unsigned long framesAvail, framesGot;
+ int xrun = 0;
+
+ pthread_testcancel();
+
+ /* @concern StreamStop if the main thread has requested a stop and the stream has not been effectively
+ * stopped we signal this condition by modifying callbackResult (we'll want to flush buffered output).
+ */
+ if( stream->callbackStop && paContinue == callbackResult )
+ {
+ PA_DEBUG(( "Setting callbackResult to paComplete\n" ));
+ callbackResult = paComplete;
+ }
+
+ if( paContinue != callbackResult )
+ {
+ stream->callbackAbort = (paAbort == callbackResult);
+ if( stream->callbackAbort ||
+ /** @concern BlockAdaption Go on if adaption buffers are empty */
+ PaUtil_IsBufferProcessorOutputEmpty( &stream->bufferProcessor ) )
+ goto end;
+
+ PA_DEBUG(( "%s: Flushing buffer processor\n", __FUNCTION__ ));
+ /* There is still buffered output that needs to be processed */
+ }
+
+ /* Wait for data to become available, this comes down to polling the ALSA file descriptors untill we have
+ * a number of available frames.
+ */
+ PA_ENSURE( PaAlsaStream_WaitForFrames( stream, &framesAvail, &xrun ) );
+ if( xrun )
+ {
+ assert( 0 == framesAvail );
+ continue;
+
+ /* XXX: Report xruns to the user? A situation is conceivable where the callback is never invoked due
+ * to constant xruns, it might be desirable to notify the user of this.
+ */
+ }
+
+ /* Consume buffer space. Once we have a number of frames available for consumption we must retrieve the
+ * mmapped buffers from ALSA, this is contiguously accessible memory however, so we may receive smaller
+ * portions at a time than is available as a whole. Therefore we should be prepared to process several
+ * chunks successively. The buffers are passed to the PA buffer processor.
+ */
+ while( framesAvail > 0 )
+ {
+ xrun = 0;
+
+ pthread_testcancel();
+
+ /** @concern Xruns Under/overflows are to be reported to the callback */
+ if( stream->underrun > 0.0 )
+ {
+ cbFlags |= paOutputUnderflow;
+ stream->underrun = 0.0;
+ }
+ if( stream->overrun > 0.0 )
+ {
+ cbFlags |= paInputOverflow;
+ stream->overrun = 0.0;
+ }
+ if( stream->capture.pcm && stream->playback.pcm )
+ {
+ /** @concern FullDuplex It's possible that only one direction is being processed to avoid an
+ * under- or overflow, this should be reported correspondingly */
+ if( !stream->capture.ready )
+ {
+ cbFlags |= paInputUnderflow;
+ PA_DEBUG(( "%s: Input underflow\n", __FUNCTION__ ));
+ }
+ else if( !stream->playback.ready )
+ {
+ cbFlags |= paOutputOverflow;
+ PA_DEBUG(( "%s: Output overflow\n", __FUNCTION__ ));
+ }
+ }
+
+ CallbackUpdate( &stream->threading );
+ CalculateTimeInfo( stream, &timeInfo );
+ PaUtil_BeginBufferProcessing( &stream->bufferProcessor, &timeInfo, cbFlags );
+ cbFlags = 0;
+
+ /* CPU load measurement should include processing activivity external to the stream callback */
+ PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
+
+ framesGot = framesAvail;
+ PA_ENSURE( PaAlsaStream_SetUpBuffers( stream, &framesGot, &xrun ) );
+ framesAvail -= framesGot;
+
+ if( framesGot > 0 )
+ {
+ assert( !xrun );
+
+ PaUtil_EndBufferProcessing( &stream->bufferProcessor, &callbackResult );
+ PA_ENSURE( PaAlsaStream_EndProcessing( stream, framesGot, &xrun ) );
+ }
+ PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, framesGot );
+
+ if( framesGot == 0 )
+ {
+ if( !xrun )
+ PA_DEBUG(( "%s: Received less frames than reported from ALSA!\n", __FUNCTION__ ));
+
+ /* Go back to polling for more frames */
+ break;
+
+ }
+
+ if( paContinue != callbackResult )
+ break;
+ }
+ }
+
+ /* Match pthread_cleanup_push */
+ pthread_cleanup_pop( 1 );
+
+end:
+ pthread_exit( pres );
+
+error:
+ /* Pass on error code */
+ pres = malloc( sizeof (PaError) );
+ *pres = result;
+
+ goto end;
+}
+
+/* Blocking interface */
+
+static PaError ReadStream( PaStream* s, void *buffer, unsigned long frames )
+{
+ PaError result = paNoError;
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+ unsigned long framesGot, framesAvail;
+ void *userBuffer;
+ snd_pcm_t *save = stream->playback.pcm;
+
+ assert( stream );
+
+ PA_UNLESS( stream->capture.pcm, paCanNotReadFromAnOutputOnlyStream );
+
+ /* Disregard playback */
+ stream->playback.pcm = NULL;
+
+ if( stream->overrun > 0. )
+ {
+ result = paInputOverflowed;
+ stream->overrun = 0.0;
+ }
+
+ if( stream->capture.userInterleaved )
+ userBuffer = buffer;
+ else
+ {
+ /* Copy channels into local array */
+ userBuffer = stream->capture.userBuffers;
+ memcpy( userBuffer, buffer, sizeof (void *) * stream->capture.numUserChannels );
+ }
+
+ /* Start stream if in prepared state */
+ if( snd_pcm_state( stream->capture.pcm ) == SND_PCM_STATE_PREPARED )
+ {
+ ENSURE_( snd_pcm_start( stream->capture.pcm ), paUnanticipatedHostError );
+ }
+
+ while( frames > 0 )
+ {
+ int xrun = 0;
+ PA_ENSURE( PaAlsaStream_WaitForFrames( stream, &framesAvail, &xrun ) );
+ framesGot = PA_MIN( framesAvail, frames );
+
+ PA_ENSURE( PaAlsaStream_SetUpBuffers( stream, &framesGot, &xrun ) );
+ if( framesGot > 0 )
+ {
+ framesGot = PaUtil_CopyInput( &stream->bufferProcessor, &userBuffer, framesGot );
+ PA_ENSURE( PaAlsaStream_EndProcessing( stream, framesGot, &xrun ) );
+ frames -= framesGot;
+ }
+ }
+
+end:
+ stream->playback.pcm = save;
+ return result;
+error:
+ goto end;
+}
+
+static PaError WriteStream( PaStream* s, const void *buffer, unsigned long frames )
+{
+ PaError result = paNoError;
+ signed long err;
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+ snd_pcm_uframes_t framesGot, framesAvail;
+ const void *userBuffer;
+ snd_pcm_t *save = stream->capture.pcm;
+
+ assert( stream );
+
+ PA_UNLESS( stream->playback.pcm, paCanNotWriteToAnInputOnlyStream );
+
+ /* Disregard capture */
+ stream->capture.pcm = NULL;
+
+ if( stream->underrun > 0. )
+ {
+ result = paOutputUnderflowed;
+ stream->underrun = 0.0;
+ }
+
+ if( stream->playback.userInterleaved )
+ userBuffer = buffer;
+ else /* Copy channels into local array */
+ {
+ userBuffer = stream->playback.userBuffers;
+ memcpy( (void *)userBuffer, buffer, sizeof (void *) * stream->playback.numUserChannels );
+ }
+
+ while( frames > 0 )
+ {
+ int xrun = 0;
+ snd_pcm_uframes_t hwAvail;
+
+ PA_ENSURE( PaAlsaStream_WaitForFrames( stream, &framesAvail, &xrun ) );
+ framesGot = PA_MIN( framesAvail, frames );
+
+ PA_ENSURE( PaAlsaStream_SetUpBuffers( stream, &framesGot, &xrun ) );
+ if( framesGot > 0 )
+ {
+ framesGot = PaUtil_CopyOutput( &stream->bufferProcessor, &userBuffer, framesGot );
+ PA_ENSURE( PaAlsaStream_EndProcessing( stream, framesGot, &xrun ) );
+ frames -= framesGot;
+ }
+
+ /* Start stream after one period of samples worth */
+
+ /* Frames residing in buffer */
+ PA_ENSURE( err = GetStreamWriteAvailable( stream ) );
+ framesAvail = err;
+ hwAvail = stream->playback.bufferSize - framesAvail;
+
+ if( snd_pcm_state( stream->playback.pcm ) == SND_PCM_STATE_PREPARED &&
+ hwAvail >= stream->playback.framesPerBuffer )
+ {
+ ENSURE_( snd_pcm_start( stream->playback.pcm ), paUnanticipatedHostError );
+ }
+ }
+
+end:
+ stream->capture.pcm = save;
+ return result;
+error:
+ goto end;
+}
+
+/* Return frames available for reading. In the event of an overflow, the capture pcm will be restarted */
+static signed long GetStreamReadAvailable( PaStream* s )
+{
+ PaError result = paNoError;
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+ unsigned long avail;
+ int xrun;
+
+ PA_ENSURE( PaAlsaStreamComponent_GetAvailableFrames( &stream->capture, &avail, &xrun ) );
+ if( xrun )
+ {
+ PA_ENSURE( PaAlsaStream_HandleXrun( stream ) );
+ PA_ENSURE( PaAlsaStreamComponent_GetAvailableFrames( &stream->capture, &avail, &xrun ) );
+ if( xrun )
+ PA_ENSURE( paInputOverflowed );
+ }
+
+ return (signed long)avail;
+
+error:
+ return result;
+}
+
+static signed long GetStreamWriteAvailable( PaStream* s )
+{
+ PaError result = paNoError;
+ PaAlsaStream *stream = (PaAlsaStream*)s;
+ unsigned long avail;
+ int xrun;
+
+ PA_ENSURE( PaAlsaStreamComponent_GetAvailableFrames( &stream->playback, &avail, &xrun ) );
+ if( xrun )
+ {
+ snd_pcm_sframes_t savail;
+
+ PA_ENSURE( PaAlsaStream_HandleXrun( stream ) );
+ savail = snd_pcm_avail_update( stream->playback.pcm );
+
+ /* savail should not contain -EPIPE now, since PaAlsaStream_HandleXrun will only prepare the pcm */
+ ENSURE_( savail, paUnanticipatedHostError );
+
+ avail = (unsigned long) savail;
+ }
+
+ return (signed long)avail;
+
+error:
+ return result;
+}
+
+/* Extensions */
+
+/* Initialize host api specific structure */
+void PaAlsa_InitializeStreamInfo( PaAlsaStreamInfo *info )
+{
+ info->size = sizeof (PaAlsaStreamInfo);
+ info->hostApiType = paALSA;
+ info->version = 1;
+ info->deviceString = NULL;
+}
+
+void PaAlsa_EnableRealtimeScheduling( PaStream *s, int enable )
+{
+ PaAlsaStream *stream = (PaAlsaStream *) s;
+ stream->threading.rtSched = enable;
+}
+
+void PaAlsa_EnableWatchdog( PaStream *s, int enable )
+{
+ PaAlsaStream *stream = (PaAlsaStream *) s;
+ stream->threading.useWatchdog = enable;
+}
diff --git a/portaudio/pa_linux_alsa/pa_linux_alsa.h b/portaudio/pa_linux_alsa/pa_linux_alsa.h
new file mode 100644
index 0000000000000000000000000000000000000000..b9d43c9291c20c5088b654bc83566821a0969409
--- /dev/null
+++ b/portaudio/pa_linux_alsa/pa_linux_alsa.h
@@ -0,0 +1,64 @@
+#ifndef PA_LINUX_ALSA_H
+#define PA_LINUX_ALSA_H
+
+/*
+ * $Id$
+ * PortAudio Portable Real-Time Audio Library
+ * ALSA-specific extensions
+ *
+ * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+/** @file
+ * ALSA-specific PortAudio API extension header file.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct PaAlsaStreamInfo
+{
+ unsigned long size;
+ PaHostApiTypeId hostApiType;
+ unsigned long version;
+
+ const char *deviceString;
+}
+PaAlsaStreamInfo;
+
+void PaAlsa_InitializeStreamInfo( PaAlsaStreamInfo *info );
+
+void PaAlsa_EnableRealtimeScheduling( PaStream *s, int enable );
+
+void PaAlsa_EnableWatchdog( PaStream *s, int enable );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/portaudio/pa_unix/pa_unix_hostapis.c b/portaudio/pa_unix/pa_unix_hostapis.c
new file mode 100644
index 0000000000000000000000000000000000000000..570f596e70c1b9dde9762d0d66df968bbbbac78a
--- /dev/null
+++ b/portaudio/pa_unix/pa_unix_hostapis.c
@@ -0,0 +1,64 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library UNIX initialization table
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include "pa_hostapi.h"
+
+PaError PaJack_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
+PaError PaAlsa_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
+PaError PaOSS_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
+/* Added for IRIX, Pieter, oct 2, 2003: */
+PaError PaSGI_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
+
+
+PaUtilHostApiInitializer *paHostApiInitializers[] =
+ {
+#ifdef PA_USE_OSS
+ PaOSS_Initialize,
+#endif
+
+#ifdef PA_USE_ALSA
+ PaAlsa_Initialize,
+#endif
+
+#ifdef PA_USE_JACK
+ PaJack_Initialize,
+#endif
+ /* Added for IRIX, Pieter, oct 2, 2003: */
+#ifdef PA_USE_SGI
+ PaSGI_Initialize,
+#endif
+ 0 /* NULL terminated array */
+ };
+
+int paDefaultHostApiIndex = 0;
+
+
diff --git a/portaudio/pa_unix/pa_unix_util.c b/portaudio/pa_unix/pa_unix_util.c
new file mode 100644
index 0000000000000000000000000000000000000000..f8cab4021c78afc6c5de2680ca47665f354992f0
--- /dev/null
+++ b/portaudio/pa_unix/pa_unix_util.c
@@ -0,0 +1,175 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library
+ * UNIX platform-specific support functions
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2000 Ross Bencina
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#include <pthread.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <assert.h>
+#include <string.h> /* For memset */
+
+#include "pa_util.h"
+#include "pa_unix_util.h"
+
+/*
+ Track memory allocations to avoid leaks.
+ */
+
+#if PA_TRACK_MEMORY
+static int numAllocations_ = 0;
+#endif
+
+
+void *PaUtil_AllocateMemory( long size )
+{
+ void *result = malloc( size );
+
+#if PA_TRACK_MEMORY
+ if( result != NULL ) numAllocations_ += 1;
+#endif
+ return result;
+}
+
+
+void PaUtil_FreeMemory( void *block )
+{
+ if( block != NULL )
+ {
+ free( block );
+#if PA_TRACK_MEMORY
+ numAllocations_ -= 1;
+#endif
+
+ }
+}
+
+
+int PaUtil_CountCurrentlyAllocatedBlocks( void )
+{
+#if PA_TRACK_MEMORY
+ return numAllocations_;
+#else
+ return 0;
+#endif
+}
+
+
+void Pa_Sleep( long msec )
+{
+ while( msec > 999 ) /* For OpenBSD and IRIX, argument */
+ { /* to usleep must be < 1000000. */
+ usleep( 999000 );
+ msec -= 999;
+ }
+ usleep( msec * 1000 );
+}
+
+/* *** NOT USED YET: ***
+static int usePerformanceCounter_;
+static double microsecondsPerTick_;
+*/
+
+void PaUtil_InitializeClock( void )
+{
+ /* TODO */
+}
+
+
+PaTime PaUtil_GetTime( void )
+{
+ struct timeval tv;
+ gettimeofday( &tv, NULL );
+ return (PaTime) tv.tv_usec / 1000000. + tv.tv_sec;
+}
+
+PaError PaUtil_InitializeThreading( PaUtilThreading *threading )
+{
+ (void) paUtilErr_;
+ return paNoError;
+}
+
+void PaUtil_TerminateThreading( PaUtilThreading *threading )
+{
+}
+
+PaError PaUtil_StartThreading( PaUtilThreading *threading, void *(*threadRoutine)(void *), void *data )
+{
+ pthread_create( &threading->callbackThread, NULL, threadRoutine, data );
+ return paNoError;
+}
+
+PaError PaUtil_CancelThreading( PaUtilThreading *threading, int wait, PaError *exitResult )
+{
+ PaError result = paNoError;
+ void *pret;
+
+ if( exitResult )
+ *exitResult = paNoError;
+
+ /* Only kill the thread if it isn't in the process of stopping (flushing adaptation buffers) */
+ if( !wait )
+ pthread_cancel( threading->callbackThread ); /* XXX: Safe to call this if the thread has exited on its own? */
+ pthread_join( threading->callbackThread, &pret );
+
+#ifdef PTHREAD_CANCELED
+ if( pret && PTHREAD_CANCELED != pret )
+#else
+ /* !wait means the thread may have been canceled */
+ if( pret && wait )
+#endif
+ {
+ if( exitResult )
+ *exitResult = *(PaError *) pret;
+ free( pret );
+ }
+
+ return result;
+}
+
+/*
+static void *CanaryFunc( void *userData )
+{
+ const unsigned intervalMsec = 1000;
+ PaUtilThreading *th = (PaUtilThreading *) userData;
+
+ while( 1 )
+ {
+ th->canaryTime = PaUtil_GetTime();
+
+ pthread_testcancel();
+ Pa_Sleep( intervalMsec );
+ }
+
+ pthread_exit( NULL );
+}
+*/
diff --git a/portaudio/pa_unix/pa_unix_util.h b/portaudio/pa_unix/pa_unix_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..01dda01e5f775e8ece5906ffdc29b08057c25519
--- /dev/null
+++ b/portaudio/pa_unix/pa_unix_util.h
@@ -0,0 +1,73 @@
+#ifndef PA_UNIX_UTIL_H
+#define PA_UNIX_UTIL_H
+
+#include "pa_cpuload.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+#define PA_MIN(x,y) ( (x) < (y) ? (x) : (y) )
+#define PA_MAX(x,y) ( (x) > (y) ? (x) : (y) )
+
+/* Utilize GCC branch prediction for error tests */
+#if defined __GNUC__ && __GNUC__ >= 3
+#define UNLIKELY(expr) __builtin_expect( (expr), 0 )
+#else
+#define UNLIKELY(expr) (expr)
+#endif
+
+#define STRINGIZE_HELPER(expr) #expr
+#define STRINGIZE(expr) STRINGIZE_HELPER(expr)
+
+#define PA_UNLESS(expr, code) \
+ do { \
+ if( UNLIKELY( (expr) == 0 ) ) \
+ { \
+ PaUtil_DebugPrint(( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" )); \
+ result = (code); \
+ goto error; \
+ } \
+ } while (0);
+
+static PaError paUtilErr_; /* Used with PA_ENSURE */
+
+/* Check PaError */
+#define PA_ENSURE(expr) \
+ do { \
+ if( UNLIKELY( (paUtilErr_ = (expr)) < paNoError ) ) \
+ { \
+ PaUtil_DebugPrint(( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" )); \
+ result = paUtilErr_; \
+ goto error; \
+ } \
+ } while (0);
+
+typedef struct {
+ pthread_t callbackThread;
+} PaUtilThreading;
+
+PaError PaUtil_InitializeThreading( PaUtilThreading *threading );
+void PaUtil_TerminateThreading( PaUtilThreading *threading );
+PaError PaUtil_StartThreading( PaUtilThreading *threading, void *(*threadRoutine)(void *), void *data );
+PaError PaUtil_CancelThreading( PaUtilThreading *threading, int wait, PaError *exitResult );
+
+/* State accessed by utility functions */
+
+/*
+void PaUnix_SetRealtimeScheduling( int rt );
+
+void PaUtil_InitializeThreading( PaUtilThreading *th, PaUtilCpuLoadMeasurer *clm );
+
+PaError PaUtil_CreateCallbackThread( PaUtilThreading *th, void *(*CallbackThreadFunc)( void * ), PaStream *s );
+
+PaError PaUtil_KillCallbackThread( PaUtilThreading *th, PaError *exitResult );
+
+void PaUtil_CallbackUpdate( PaUtilThreading *th );
+*/
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif
diff --git a/portaudio/pa_unix_oss/pa_unix_oss.c b/portaudio/pa_unix_oss/pa_unix_oss.c
new file mode 100644
index 0000000000000000000000000000000000000000..dce05caf6f665e010a81a96b72f8ff8e20736851
--- /dev/null
+++ b/portaudio/pa_unix_oss/pa_unix_oss.c
@@ -0,0 +1,1923 @@
+/*
+ * $Id$
+ * PortAudio Portable Real-Time Audio Library
+ * Latest Version at: http://www.portaudio.com
+ * OSS implementation by:
+ * Douglas Repetto
+ * Phil Burk
+ * Dominic Mazzoni
+ * Arve Knudsen
+ *
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 1999-2002 Ross Bencina, Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <alloca.h>
+#include <malloc.h>
+#include <assert.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/poll.h>
+#include <limits.h>
+#include <semaphore.h>
+
+
+#ifdef __FreeBSD__
+# include <sys/soundcard.h>
+# define DEVICE_NAME_BASE "/dev/dsp"
+#elif defined __linux__
+# include <linux/soundcard.h>
+# define DEVICE_NAME_BASE "/dev/dsp"
+#else
+# include <machine/soundcard.h> /* JH20010905 */
+# define DEVICE_NAME_BASE "/dev/audio"
+#endif
+
+#include "portaudio.h"
+#include "pa_util.h"
+#include "pa_allocation.h"
+#include "pa_hostapi.h"
+#include "pa_stream.h"
+#include "pa_cpuload.h"
+#include "pa_process.h"
+#include "../pa_unix/pa_unix_util.h"
+
+static int sysErr_;
+static pthread_t mainThread_;
+
+/* Check return value of system call, and map it to PaError */
+#define ENSURE_(expr, code) \
+ do { \
+ if( UNLIKELY( (sysErr_ = (expr)) < 0 ) ) \
+ { \
+ /* PaUtil_SetLastHostErrorInfo should only be used in the main thread */ \
+ if( (code) == paUnanticipatedHostError && pthread_self() == mainThread_ ) \
+ { \
+ PaUtil_SetLastHostErrorInfo( paALSA, sysErr_, strerror( errno ) ); \
+ } \
+ \
+ PaUtil_DebugPrint(( "Expression '" #expr "' failed in '" __FILE__ "', line: " STRINGIZE( __LINE__ ) "\n" )); \
+ result = (code); \
+ goto error; \
+ } \
+ } while( 0 );
+
+#ifndef AFMT_S16_NE
+#define AFMT_S16_NE Get_AFMT_S16_NE()
+/*********************************************************************
+ * Some versions of OSS do not define AFMT_S16_NE. So check CPU.
+ * PowerPC is Big Endian. X86 is Little Endian.
+ */
+static int Get_AFMT_S16_NE( void )
+{
+ long testData = 1;
+ char *ptr = (char *) &testData;
+ int isLittle = ( *ptr == 1 ); /* Does address point to least significant byte? */
+ return isLittle ? AFMT_S16_LE : AFMT_S16_BE;
+}
+#endif
+
+/* PaOSSHostApiRepresentation - host api datastructure specific to this implementation */
+
+typedef struct
+{
+ PaUtilHostApiRepresentation inheritedHostApiRep;
+ PaUtilStreamInterface callbackStreamInterface;
+ PaUtilStreamInterface blockingStreamInterface;
+
+ PaUtilAllocationGroup *allocations;
+
+ PaHostApiIndex hostApiIndex;
+}
+PaOSSHostApiRepresentation;
+
+/** Per-direction structure for PaOssStream.
+ *
+ * Aspect StreamChannels: In case the user requests to open the same device for both capture and playback,
+ * but with different number of channels we will have to adapt between the number of user and host
+ * channels for at least one direction, since the configuration space is the same for both directions
+ * of an OSS device.
+ */
+typedef struct
+{
+ int fd;
+ const char *devName;
+ int userChannelCount, hostChannelCount;
+ int userInterleaved;
+ void *buffer;
+ PaSampleFormat userFormat, hostFormat;
+ double latency;
+ unsigned long hostFrames, numBufs;
+ void **userBuffers; /* For non-interleaved blocking */
+} PaOssStreamComponent;
+
+/** Implementation specific representation of a PaStream.
+ *
+ */
+typedef struct PaOssStream
+{
+ PaUtilStreamRepresentation streamRepresentation;
+ PaUtilCpuLoadMeasurer cpuLoadMeasurer;
+ PaUtilBufferProcessor bufferProcessor;
+
+ PaUtilThreading threading;
+
+ int sharedDevice;
+ unsigned long framesPerHostBuffer;
+ int triggered; /* Have the devices been triggered yet (first start) */
+
+ int isActive;
+ int isStopped;
+
+ int lastPosPtr;
+ double lastStreamBytes;
+
+ int framesProcessed;
+
+ double sampleRate;
+
+ int callbackMode;
+ int callbackStop, callbackAbort;
+
+ PaOssStreamComponent *capture, *playback;
+ unsigned long pollTimeout;
+ sem_t semaphore;
+}
+PaOssStream;
+
+typedef enum {
+ StreamMode_In,
+ StreamMode_Out
+} StreamMode;
+
+/* prototypes for functions declared in this file */
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate );
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData );
+static PaError CloseStream( PaStream* stream );
+static PaError StartStream( PaStream *stream );
+static PaError StopStream( PaStream *stream );
+static PaError AbortStream( PaStream *stream );
+static PaError IsStreamStopped( PaStream *s );
+static PaError IsStreamActive( PaStream *stream );
+static PaTime GetStreamTime( PaStream *stream );
+static double GetStreamCpuLoad( PaStream* stream );
+static PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
+static PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
+static signed long GetStreamReadAvailable( PaStream* stream );
+static signed long GetStreamWriteAvailable( PaStream* stream );
+static PaError BuildDeviceList( PaOSSHostApiRepresentation *hostApi );
+
+
+/** Initialize the OSS API implementation.
+ *
+ * This function will initialize host API datastructures and query host devices for information.
+ *
+ * Aspect DeviceCapabilities: Enumeration of host API devices is initiated from here
+ *
+ * Aspect FreeResources: If an error is encountered under way we have to free each resource allocated in this function,
+ * this happens with the usual "error" label.
+ */
+PaError PaOSS_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
+{
+ PaError result = paNoError;
+ PaOSSHostApiRepresentation *ossHostApi = NULL;
+
+ PA_UNLESS( ossHostApi = (PaOSSHostApiRepresentation*)PaUtil_AllocateMemory( sizeof(PaOSSHostApiRepresentation) ),
+ paInsufficientMemory );
+ PA_UNLESS( ossHostApi->allocations = PaUtil_CreateAllocationGroup(), paInsufficientMemory );
+ ossHostApi->hostApiIndex = hostApiIndex;
+
+ /* Initialize host API structure */
+ *hostApi = &ossHostApi->inheritedHostApiRep;
+ (*hostApi)->info.structVersion = 1;
+ (*hostApi)->info.type = paOSS;
+ (*hostApi)->info.name = "OSS";
+ (*hostApi)->Terminate = Terminate;
+ (*hostApi)->OpenStream = OpenStream;
+ (*hostApi)->IsFormatSupported = IsFormatSupported;
+
+ PA_ENSURE( BuildDeviceList( ossHostApi ) );
+
+ PaUtil_InitializeStreamInterface( &ossHostApi->callbackStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, GetStreamCpuLoad,
+ PaUtil_DummyRead, PaUtil_DummyWrite,
+ PaUtil_DummyGetReadAvailable,
+ PaUtil_DummyGetWriteAvailable );
+
+ PaUtil_InitializeStreamInterface( &ossHostApi->blockingStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, PaUtil_DummyGetCpuLoad,
+ ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
+
+ mainThread_ = pthread_self();
+
+ return result;
+
+error:
+ if( ossHostApi )
+ {
+ if( ossHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( ossHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( ossHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( ossHostApi );
+ }
+ return result;
+}
+
+PaError PaUtil_InitializeDeviceInfo( PaDeviceInfo *deviceInfo, const char *name, PaHostApiIndex hostApiIndex, int maxInputChannels,
+ int maxOutputChannels, PaTime defaultLowInputLatency, PaTime defaultLowOutputLatency, PaTime defaultHighInputLatency,
+ PaTime defaultHighOutputLatency, double defaultSampleRate, PaUtilAllocationGroup *allocations )
+{
+ PaError result = paNoError;
+
+ deviceInfo->structVersion = 2;
+ if( allocations )
+ {
+ size_t len = strlen( name ) + 1;
+ PA_UNLESS( deviceInfo->name = PaUtil_GroupAllocateMemory( allocations, len ), paInsufficientMemory );
+ strncpy( (char *)deviceInfo->name, name, len );
+ }
+ else
+ deviceInfo->name = name;
+
+ deviceInfo->hostApi = hostApiIndex;
+ deviceInfo->maxInputChannels = maxInputChannels;
+ deviceInfo->maxOutputChannels = maxOutputChannels;
+ deviceInfo->defaultLowInputLatency = defaultLowInputLatency;
+ deviceInfo->defaultLowOutputLatency = defaultLowOutputLatency;
+ deviceInfo->defaultHighInputLatency = defaultHighInputLatency;
+ deviceInfo->defaultHighOutputLatency = defaultHighOutputLatency;
+ deviceInfo->defaultSampleRate = defaultSampleRate;
+
+error:
+ return result;
+}
+
+static PaError QueryDirection( const char *deviceName, StreamMode mode, double *defaultSampleRate, int *maxChannelCount,
+ double *defaultLowLatency, double *defaultHighLatency )
+{
+ PaError result = paNoError;
+ int numChannels, maxNumChannels;
+ int busy = 0;
+ int devHandle = -1;
+ int sr;
+ *maxChannelCount = 0; /* Default value in case this fails */
+
+ if ( (devHandle = open( deviceName, (mode == StreamMode_In ? O_RDONLY : O_WRONLY) | O_NONBLOCK )) < 0 )
+ {
+ if( errno == EBUSY || errno == EAGAIN )
+ {
+ PA_DEBUG(( "%s: Device %s busy\n", __FUNCTION__, deviceName ));
+ }
+ else
+ {
+ PA_DEBUG(( "%s: Can't access device: %s\n", __FUNCTION__, strerror( errno ) ));
+ }
+
+ return paDeviceUnavailable;
+ }
+
+ /* Negotiate for the maximum number of channels for this device. PLB20010927
+ * Consider up to 16 as the upper number of channels.
+ * Variable maxNumChannels should contain the actual upper limit after the call.
+ * Thanks to John Lazzaro and Heiko Purnhagen for suggestions.
+ */
+ maxNumChannels = 0;
+ for( numChannels = 1; numChannels <= 16; numChannels++ )
+ {
+ int temp = numChannels;
+ if( ioctl( devHandle, SNDCTL_DSP_CHANNELS, &temp ) < 0 )
+ {
+ busy = EAGAIN == errno || EBUSY == errno;
+ /* ioctl() failed so bail out if we already have stereo */
+ if( maxNumChannels >= 2 )
+ break;
+ }
+ else
+ {
+ /* ioctl() worked but bail out if it does not support numChannels.
+ * We don't want to leave gaps in the numChannels supported.
+ */
+ if( (numChannels > 2) && (temp != numChannels) )
+ break;
+ if( temp > maxNumChannels )
+ maxNumChannels = temp; /* Save maximum. */
+ }
+ }
+ /* A: We're able to open a device for capture if it's busy playing back and vice versa,
+ * but we can't configure anything */
+ if( 0 == maxNumChannels && busy )
+ {
+ result = paDeviceUnavailable;
+ goto error;
+ }
+
+ /* The above negotiation may fail for an old driver so try this older technique. */
+ if( maxNumChannels < 1 )
+ {
+ int stereo = 1;
+ if( ioctl( devHandle, SNDCTL_DSP_STEREO, &stereo ) < 0 )
+ {
+ maxNumChannels = 1;
+ }
+ else
+ {
+ maxNumChannels = (stereo) ? 2 : 1;
+ }
+ PA_DEBUG(( "%s: use SNDCTL_DSP_STEREO, maxNumChannels = %d\n", __FUNCTION__, maxNumChannels ))
+ }
+
+ /* During channel negotiation, the last ioctl() may have failed. This can
+ * also cause sample rate negotiation to fail. Hence the following, to return
+ * to a supported number of channels. SG20011005 */
+ {
+ /* use most reasonable default value */
+ int temp = PA_MIN( maxNumChannels, 2 );
+ ENSURE_( ioctl( devHandle, SNDCTL_DSP_CHANNELS, &temp ), paUnanticipatedHostError );
+ }
+
+ /* Get supported sample rate closest to 44100 Hz */
+ if( *defaultSampleRate < 0 )
+ {
+ sr = 44100;
+ if( ioctl( devHandle, SNDCTL_DSP_SPEED, &sr ) < 0 )
+ {
+ result = paUnanticipatedHostError;
+ goto error;
+ }
+
+ *defaultSampleRate = sr;
+ }
+
+ *maxChannelCount = maxNumChannels;
+ /* TODO */
+ *defaultLowLatency = 512. / *defaultSampleRate;
+ *defaultHighLatency = 2048. / *defaultSampleRate;
+
+error:
+ if( devHandle >= 0 )
+ close( devHandle );
+
+ return result;
+}
+
+/** Query OSS device.
+ *
+ * This is where PaDeviceInfo objects are constructed and filled in with relevant information.
+ *
+ * Aspect DeviceCapabilities: The inferred device capabilities are recorded in a PaDeviceInfo object that is constructed
+ * in place.
+ */
+static PaError QueryDevice( char *deviceName, PaOSSHostApiRepresentation *ossApi, PaDeviceInfo **deviceInfo )
+{
+ PaError result = paNoError;
+ double sampleRate = -1.;
+ int maxInputChannels, maxOutputChannels;
+ PaTime defaultLowInputLatency, defaultLowOutputLatency, defaultHighInputLatency, defaultHighOutputLatency;
+ PaError tmpRes = paNoError;
+ int busy = 0;
+ *deviceInfo = NULL;
+
+ /* douglas:
+ we have to do this querying in a slightly different order. apparently
+ some sound cards will give you different info based on their settins.
+ e.g. a card might give you stereo at 22kHz but only mono at 44kHz.
+ the correct order for OSS is: format, channels, sample rate
+ */
+
+ /* Aspect StreamChannels: The number of channels supported for a device may depend on the mode it is
+ * opened in, it may have more channels available for capture than playback and vice versa. Therefore
+ * we will open the device in both read- and write-only mode to determine the supported number.
+ */
+ if( (tmpRes = QueryDirection( deviceName, StreamMode_In, &sampleRate, &maxInputChannels, &defaultLowInputLatency,
+ &defaultHighInputLatency )) != paNoError )
+ {
+ if( tmpRes != paDeviceUnavailable )
+ {
+ PA_DEBUG(( "%s: Querying device %s for capture failed!\n", __FUNCTION__, deviceName ));
+ /* PA_ENSURE( tmpRes ); */
+ }
+ ++busy;
+ }
+ if( (tmpRes = QueryDirection( deviceName, StreamMode_Out, &sampleRate, &maxOutputChannels, &defaultLowOutputLatency,
+ &defaultHighOutputLatency )) != paNoError )
+ {
+ if( tmpRes != paDeviceUnavailable )
+ {
+ PA_DEBUG(( "%s: Querying device %s for playback failed!\n", __FUNCTION__, deviceName ));
+ /* PA_ENSURE( tmpRes ); */
+ }
+ ++busy;
+ }
+ assert( 0 <= busy && busy <= 2 );
+ if( 2 == busy ) /* Both directions are unavailable to us */
+ {
+ result = paDeviceUnavailable;
+ goto error;
+ }
+
+ PA_UNLESS( *deviceInfo = PaUtil_GroupAllocateMemory( ossApi->allocations, sizeof (PaDeviceInfo) ), paInsufficientMemory );
+ PA_ENSURE( PaUtil_InitializeDeviceInfo( *deviceInfo, deviceName, ossApi->hostApiIndex, maxInputChannels, maxOutputChannels,
+ defaultLowInputLatency, defaultLowOutputLatency, defaultHighInputLatency, defaultHighOutputLatency, sampleRate,
+ ossApi->allocations ) );
+
+error:
+ return result;
+}
+
+/** Query host devices.
+ *
+ * Loop over host devices and query their capabilitiesu
+ *
+ * Aspect DeviceCapabilities: This function calls QueryDevice on each device entry and receives a filled in PaDeviceInfo object
+ * per device, these are placed in the host api representation's deviceInfos array.
+ */
+static PaError BuildDeviceList( PaOSSHostApiRepresentation *ossApi )
+{
+ PaError result = paNoError;
+ PaUtilHostApiRepresentation *commonApi = &ossApi->inheritedHostApiRep;
+ int i;
+ int numDevices = 0, maxDeviceInfos = 1;
+ PaDeviceInfo **deviceInfos = NULL;
+
+ /* These two will be set to the first working input and output device, respectively */
+ commonApi->info.defaultInputDevice = paNoDevice;
+ commonApi->info.defaultOutputDevice = paNoDevice;
+
+ /* Find devices by calling QueryDevice on each
+ * potential device names. When we find a valid one,
+ * add it to a linked list.
+ * A: Can there only be 10 devices? */
+
+ for( i = 0; i < 10; i++ )
+ {
+ char deviceName[32];
+ PaDeviceInfo *deviceInfo;
+ int testResult;
+ struct stat stbuf;
+
+ if( i == 0 )
+ snprintf(deviceName, sizeof (deviceName), "%s", DEVICE_NAME_BASE);
+ else
+ snprintf(deviceName, sizeof (deviceName), "%s%d", DEVICE_NAME_BASE, i);
+
+ /* PA_DEBUG(("PaOSS BuildDeviceList: trying device %s\n", deviceName )); */
+ if( stat( deviceName, &stbuf ) < 0 )
+ {
+ if( ENOENT != errno )
+ PA_DEBUG(( "%s: Error stat'ing %s: %s\n", __FUNCTION__, deviceName, strerror( errno ) ));
+ continue;
+ }
+ if( (testResult = QueryDevice( deviceName, ossApi, &deviceInfo )) != paNoError )
+ {
+ if( testResult != paDeviceUnavailable )
+ PA_ENSURE( testResult );
+
+ continue;
+ }
+
+ ++numDevices;
+ if( !deviceInfos || numDevices > maxDeviceInfos )
+ {
+ maxDeviceInfos *= 2;
+ PA_UNLESS( deviceInfos = (PaDeviceInfo **) realloc( deviceInfos, maxDeviceInfos * sizeof (PaDeviceInfo *) ),
+ paInsufficientMemory );
+ }
+ deviceInfos[numDevices - 1] = deviceInfo;
+
+ if( commonApi->info.defaultInputDevice == paNoDevice && deviceInfo->maxInputChannels > 0 )
+ commonApi->info.defaultInputDevice = i;
+ if( commonApi->info.defaultOutputDevice == paNoDevice && deviceInfo->maxOutputChannels > 0 )
+ commonApi->info.defaultOutputDevice = i;
+ }
+
+ /* Make an array of PaDeviceInfo pointers out of the linked list */
+
+ PA_DEBUG(("PaOSS %s: Total number of devices found: %d\n", __FUNCTION__, numDevices));
+
+ commonApi->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
+ ossApi->allocations, sizeof(PaDeviceInfo*) * numDevices );
+ memcpy( commonApi->deviceInfos, deviceInfos, numDevices * sizeof (PaDeviceInfo *) );
+
+ commonApi->info.deviceCount = numDevices;
+
+error:
+ free( deviceInfos );
+
+ return result;
+}
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
+{
+ PaOSSHostApiRepresentation *ossHostApi = (PaOSSHostApiRepresentation*)hostApi;
+
+ if( ossHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( ossHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( ossHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( ossHostApi );
+}
+
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate )
+{
+ PaError result = paNoError;
+ PaDeviceIndex device;
+ PaDeviceInfo *deviceInfo;
+ char *deviceName;
+ int inputChannelCount, outputChannelCount;
+ int tempDevHandle = -1;
+ int flags;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+
+ if( inputParameters )
+ {
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that input device can support inputChannelCount */
+ if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
+ return paInvalidChannelCount;
+
+ /* validate inputStreamInfo */
+ if( inputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ inputChannelCount = 0;
+ }
+
+ if( outputParameters )
+ {
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that output device can support inputChannelCount */
+ if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
+ return paInvalidChannelCount;
+
+ /* validate outputStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ outputChannelCount = 0;
+ }
+
+ if (inputChannelCount == 0 && outputChannelCount == 0)
+ return paInvalidChannelCount;
+
+ /* if full duplex, make sure that they're the same device */
+
+ if (inputChannelCount > 0 && outputChannelCount > 0 &&
+ inputParameters->device != outputParameters->device)
+ return paInvalidDevice;
+
+ /* if full duplex, also make sure that they're the same number of channels */
+
+ if (inputChannelCount > 0 && outputChannelCount > 0 &&
+ inputChannelCount != outputChannelCount)
+ return paInvalidChannelCount;
+
+ /* open the device so we can do more tests */
+
+ if( inputChannelCount > 0 )
+ {
+ result = PaUtil_DeviceIndexToHostApiDeviceIndex(&device, inputParameters->device, hostApi);
+ if (result != paNoError)
+ return result;
+ }
+ else
+ {
+ result = PaUtil_DeviceIndexToHostApiDeviceIndex(&device, outputParameters->device, hostApi);
+ if (result != paNoError)
+ return result;
+ }
+
+ deviceInfo = hostApi->deviceInfos[device];
+ deviceName = (char *)deviceInfo->name;
+
+ flags = O_NONBLOCK;
+ if (inputChannelCount > 0 && outputChannelCount > 0)
+ flags |= O_RDWR;
+ else if (inputChannelCount > 0)
+ flags |= O_RDONLY;
+ else
+ flags |= O_WRONLY;
+
+ ENSURE_( tempDevHandle = open( deviceInfo->name, flags ), paDeviceUnavailable );
+
+ /* PaOssStream_Configure will do the rest of the checking for us */
+ /* PA_ENSURE( PaOssStream_Configure( tempDevHandle, deviceName, outputChannelCount, &sampleRate ) ); */
+
+ /* everything succeeded! */
+
+ error:
+ if( tempDevHandle >= 0 )
+ close( tempDevHandle );
+
+ return result;
+}
+
+/** Validate stream parameters.
+ *
+ * Aspect StreamChannels: We verify that the number of channels is within the allowed range for the device
+ */
+static PaError ValidateParameters( const PaStreamParameters *parameters, const PaDeviceInfo *deviceInfo, StreamMode mode )
+{
+ int maxChans;
+
+ assert( parameters );
+
+ if( parameters->device == paUseHostApiSpecificDeviceSpecification )
+ {
+ return paInvalidDevice;
+ }
+
+ maxChans = (mode == StreamMode_In ? deviceInfo->maxInputChannels :
+ deviceInfo->maxOutputChannels);
+ if( parameters->channelCount > maxChans )
+ {
+ return paInvalidChannelCount;
+ }
+
+ return paNoError;
+}
+
+static PaError PaOssStreamComponent_Initialize( PaOssStreamComponent *component, const PaStreamParameters *parameters,
+ int callbackMode, int fd, const char *deviceName )
+{
+ PaError result = paNoError;
+ assert( component );
+
+ memset( component, 0, sizeof (PaOssStreamComponent) );
+
+ component->fd = fd;
+ component->devName = deviceName;
+ component->userChannelCount = parameters->channelCount;
+ component->userFormat = parameters->sampleFormat;
+ component->latency = parameters->suggestedLatency;
+ component->userInterleaved = !(parameters->sampleFormat & paNonInterleaved);
+
+ if( !callbackMode && !component->userInterleaved )
+ {
+ /* Pre-allocate non-interleaved user provided buffers */
+ PA_UNLESS( component->userBuffers = PaUtil_AllocateMemory( sizeof (void *) * component->userChannelCount ),
+ paInsufficientMemory );
+ }
+
+error:
+ return result;
+}
+
+static void PaOssStreamComponent_Terminate( PaOssStreamComponent *component )
+{
+ assert( component );
+
+ if( component->fd >= 0 )
+ close( component->fd );
+ if( component->buffer )
+ PaUtil_FreeMemory( component->buffer );
+
+ if( component->userBuffers )
+ PaUtil_FreeMemory( component->userBuffers );
+
+ PaUtil_FreeMemory( component );
+}
+
+static PaError ModifyBlocking( int fd, int blocking )
+{
+ PaError result = paNoError;
+ int fflags;
+
+ ENSURE_( fflags = fcntl( fd, F_GETFL ), paUnanticipatedHostError );
+
+ if( blocking )
+ fflags &= ~O_NONBLOCK;
+ else
+ fflags |= O_NONBLOCK;
+
+ ENSURE_( fcntl( fd, F_SETFL, fflags ), paUnanticipatedHostError );
+
+error:
+ return result;
+}
+
+static PaError OpenDevices( const char *idevName, const char *odevName, int *idev, int *odev )
+{
+ PaError result = paNoError;
+ int flags = O_NONBLOCK, duplex = 0;
+ int enableBits = 0;
+ *idev = *odev = -1;
+
+ if( idevName && odevName )
+ {
+ duplex = 1;
+ flags |= O_RDWR;
+ }
+ else if( idevName )
+ flags |= O_RDONLY;
+ else
+ flags |= O_WRONLY;
+
+ /* open first in nonblocking mode, in case it's busy...
+ * A: then unset the non-blocking attribute */
+ assert( flags & O_NONBLOCK );
+ if( idevName )
+ {
+ ENSURE_( *idev = open( idevName, flags ), paDeviceUnavailable );
+ PA_ENSURE( ModifyBlocking( *idev, 1 ) ); /* Blocking */
+
+ /* Initially disable */
+ enableBits = ~PCM_ENABLE_INPUT;
+ ENSURE_( ioctl( *idev, SNDCTL_DSP_SETTRIGGER, &enableBits ), paUnanticipatedHostError );
+ }
+ if( odevName )
+ {
+ if( !idevName )
+ {
+ ENSURE_( *odev = open( odevName, flags ), paDeviceUnavailable );
+ PA_ENSURE( ModifyBlocking( *odev, 1 ) ); /* Blocking */
+
+ /* Initially disable */
+ enableBits = ~PCM_ENABLE_OUTPUT;
+ ENSURE_( ioctl( *odev, SNDCTL_DSP_SETTRIGGER, &enableBits ), paUnanticipatedHostError );
+ }
+ else
+ {
+ ENSURE_( *odev = dup( *idev ), paUnanticipatedHostError );
+ }
+ }
+
+error:
+ return result;
+}
+
+static PaError PaOssStream_Initialize( PaOssStream *stream, const PaStreamParameters *inputParameters, const PaStreamParameters *outputParameters,
+ PaStreamCallback callback, void *userData, PaStreamFlags streamFlags,
+ PaOSSHostApiRepresentation *ossApi )
+{
+ PaError result = paNoError;
+ int idev, odev;
+ PaUtilHostApiRepresentation *hostApi = &ossApi->inheritedHostApiRep;
+ const char *idevName = NULL, *odevName = NULL;
+
+ assert( stream );
+
+ memset( stream, 0, sizeof (PaOssStream) );
+ stream->isStopped = 1;
+
+ PA_ENSURE( PaUtil_InitializeThreading( &stream->threading ) );
+
+ if( inputParameters && outputParameters )
+ {
+ if( inputParameters->device == outputParameters->device )
+ stream->sharedDevice = 1;
+ }
+
+ if( inputParameters )
+ idevName = hostApi->deviceInfos[inputParameters->device]->name;
+ if( outputParameters )
+ odevName = hostApi->deviceInfos[outputParameters->device]->name;
+ PA_ENSURE( OpenDevices( idevName, odevName, &idev, &odev ) );
+ if( inputParameters )
+ {
+ PA_UNLESS( stream->capture = PaUtil_AllocateMemory( sizeof (PaOssStreamComponent) ), paInsufficientMemory );
+ PA_ENSURE( PaOssStreamComponent_Initialize( stream->capture, inputParameters, callback != NULL, idev, idevName ) );
+ }
+ if( outputParameters )
+ {
+ PA_UNLESS( stream->playback = PaUtil_AllocateMemory( sizeof (PaOssStreamComponent) ), paInsufficientMemory );
+ PA_ENSURE( PaOssStreamComponent_Initialize( stream->playback, outputParameters, callback != NULL, odev, odevName ) );
+ }
+
+ if( callback != NULL )
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &ossApi->callbackStreamInterface, callback, userData );
+ stream->callbackMode = 1;
+ }
+ else
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &ossApi->blockingStreamInterface, callback, userData );
+ }
+
+ ENSURE_( sem_init( &stream->semaphore, 0, 0 ), paInternalError );
+
+error:
+ return result;
+}
+
+static void PaOssStream_Terminate( PaOssStream *stream )
+{
+ assert( stream );
+
+ PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
+ PaUtil_TerminateThreading( &stream->threading );
+
+ if( stream->capture )
+ PaOssStreamComponent_Terminate( stream->capture );
+ if( stream->playback )
+ PaOssStreamComponent_Terminate( stream->playback );
+
+ sem_destroy( &stream->semaphore );
+
+ PaUtil_FreeMemory( stream );
+}
+
+/** Translate from PA format to OSS native.
+ *
+ */
+static PaError Pa2OssFormat( PaSampleFormat paFormat, int *ossFormat )
+{
+ switch( paFormat )
+ {
+ case paUInt8:
+ *ossFormat = AFMT_U8;
+ break;
+ case paInt8:
+ *ossFormat = AFMT_S8;
+ break;
+ case paInt16:
+ *ossFormat = AFMT_S16_NE;
+ break;
+ default:
+ return paInternalError; /* This shouldn't happen */
+ }
+
+ return paNoError;
+}
+
+/** Return the PA-compatible formats that this device can support.
+ *
+ */
+static PaError GetAvailableFormats( PaOssStreamComponent *component, PaSampleFormat *availableFormats )
+{
+ PaError result = paNoError;
+ int mask = 0;
+ PaSampleFormat frmts = 0;
+
+ ENSURE_( ioctl( component->fd, SNDCTL_DSP_GETFMTS, &mask ), paUnanticipatedHostError );
+ if( mask & AFMT_U8 )
+ frmts |= paUInt8;
+ if( mask & AFMT_S8 )
+ frmts |= paInt8;
+ if( mask & AFMT_S16_NE )
+ frmts |= paInt16;
+ else
+ result = paSampleFormatNotSupported;
+
+ *availableFormats = frmts;
+
+error:
+ return result;
+}
+
+static unsigned int PaOssStreamComponent_FrameSize( PaOssStreamComponent *component )
+{
+ return Pa_GetSampleSize( component->hostFormat ) * component->hostChannelCount;
+}
+
+/** Buffer size in bytes.
+ *
+ */
+static unsigned long PaOssStreamComponent_BufferSize( PaOssStreamComponent *component )
+{
+ return PaOssStreamComponent_FrameSize( component ) * component->hostFrames * component->numBufs;
+}
+
+static int CalcHigherLogTwo( int n )
+{
+ int log2 = 0;
+ while( (1<<log2) < n ) log2++;
+ return log2;
+}
+
+static PaError PaOssStreamComponent_Configure( PaOssStreamComponent *component, double sampleRate, unsigned long framesPerBuffer,
+ StreamMode streamMode, PaOssStreamComponent *master )
+{
+ PaError result = paNoError;
+ int temp, nativeFormat;
+ int sr = (int)sampleRate;
+ PaSampleFormat availableFormats, hostFormat;
+ int chans = component->userChannelCount;
+ int frgmt;
+ int numBufs;
+ int bytesPerBuf;
+ double bufSz;
+ unsigned long fragSz;
+ audio_buf_info bufInfo;
+
+ /* We may have a situation where only one component (the master) is configured, if both point to the same device.
+ * In that case, the second component will copy settings from the other */
+ if( !master )
+ {
+ /* Aspect BufferSettings: If framesPerBuffer is unspecified we have to infer a suitable fragment size.
+ * The hardware need not respect the requested fragment size, so we may have to adapt.
+ */
+ if( framesPerBuffer == paFramesPerBufferUnspecified )
+ {
+ bufSz = component->latency * sampleRate;
+ fragSz = bufSz / 4;
+ }
+ else
+ {
+ fragSz = framesPerBuffer;
+ bufSz = component->latency * sampleRate + fragSz; /* Latency + 1 buffer */
+ }
+
+ PA_ENSURE( GetAvailableFormats( component, &availableFormats ) );
+ hostFormat = PaUtil_SelectClosestAvailableFormat( availableFormats, component->userFormat );
+
+ /* OSS demands at least 2 buffers, and 16 bytes per buffer */
+ numBufs = PA_MAX( bufSz / fragSz, 2 );
+ bytesPerBuf = PA_MAX( fragSz * Pa_GetSampleSize( hostFormat ) * chans, 16 );
+
+ /* The fragment parameters are encoded like this:
+ * Most significant byte: number of fragments
+ * Least significant byte: exponent of fragment size (i.e., for 256, 8)
+ */
+ frgmt = (numBufs << 16) + (CalcHigherLogTwo( bytesPerBuf ) & 0xffff);
+ ENSURE_( ioctl( component->fd, SNDCTL_DSP_SETFRAGMENT, &frgmt ), paUnanticipatedHostError );
+
+ /* A: according to the OSS programmer's guide parameters should be set in this order:
+ * format, channels, rate */
+
+ /* This format should be deemed good before we get this far */
+ PA_ENSURE( Pa2OssFormat( hostFormat, &temp ) );
+ nativeFormat = temp;
+ ENSURE_( ioctl( component->fd, SNDCTL_DSP_SETFMT, &temp ), paUnanticipatedHostError );
+ PA_UNLESS( temp == nativeFormat, paInternalError );
+
+ /* try to set the number of channels */
+ ENSURE_( ioctl( component->fd, SNDCTL_DSP_CHANNELS, &chans ), paSampleFormatNotSupported ); /* XXX: Should be paInvalidChannelCount? */
+ /* It's possible that the minimum number of host channels is greater than what the user requested */
+ PA_UNLESS( chans >= component->userChannelCount, paInvalidChannelCount );
+
+ /* try to set the sample rate */
+ ENSURE_( ioctl( component->fd, SNDCTL_DSP_SPEED, &sr ), paInvalidSampleRate );
+
+ /* reject if there's no sample rate within 1% of the one requested */
+ if( (fabs( sampleRate - sr ) / sampleRate) > 0.01 )
+ {
+ PA_DEBUG(("%s: Wanted %f, closest sample rate was %d\n", __FUNCTION__, sampleRate, sr ));
+ PA_ENSURE( paInvalidSampleRate );
+ }
+
+ ENSURE_( ioctl( component->fd, streamMode == StreamMode_In ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &bufInfo ),
+ paUnanticipatedHostError );
+ component->numBufs = bufInfo.fragstotal;
+
+ /* This needs to be the last ioctl call before the first read/write, according to the OSS programmer's guide */
+ ENSURE_( ioctl( component->fd, SNDCTL_DSP_GETBLKSIZE, &bytesPerBuf ), paUnanticipatedHostError );
+
+ component->hostFrames = bytesPerBuf / Pa_GetSampleSize( hostFormat ) / chans;
+ component->hostChannelCount = chans;
+ component->hostFormat = hostFormat;
+ }
+ else
+ {
+ component->hostFormat = master->hostFormat;
+ component->hostFrames = master->hostFrames;
+ component->hostChannelCount = master->hostChannelCount;
+ component->numBufs = master->numBufs;
+ }
+
+ PA_UNLESS( component->buffer = PaUtil_AllocateMemory( PaOssStreamComponent_BufferSize( component ) ),
+ paInsufficientMemory );
+
+error:
+ return result;
+}
+
+static PaError PaOssStreamComponent_Read( PaOssStreamComponent *component, unsigned long *frames )
+{
+ PaError result = paNoError;
+ size_t len = *frames * PaOssStreamComponent_FrameSize( component );
+ ssize_t bytesRead;
+
+ ENSURE_( bytesRead = read( component->fd, component->buffer, len ), paUnanticipatedHostError );
+ *frames = bytesRead / PaOssStreamComponent_FrameSize( component );
+ /* TODO: Handle condition where number of frames read doesn't equal number of frames requested */
+
+error:
+ return result;
+}
+
+static PaError PaOssStreamComponent_Write( PaOssStreamComponent *component, unsigned long *frames )
+{
+ PaError result = paNoError;
+ size_t len = *frames * PaOssStreamComponent_FrameSize( component );
+ ssize_t bytesWritten;
+
+ ENSURE_( bytesWritten = write( component->fd, component->buffer, len ), paUnanticipatedHostError );
+ *frames = bytesWritten / PaOssStreamComponent_FrameSize( component );
+ /* TODO: Handle condition where number of frames written doesn't equal number of frames requested */
+
+error:
+ return result;
+}
+
+/** Configure the stream according to input/output parameters.
+ *
+ * Aspect StreamChannels: The minimum number of channels supported by the device may exceed that requested by
+ * the user, if so we'll record the actual number of host channels and adapt later.
+ */
+static PaError PaOssStream_Configure( PaOssStream *stream, double sampleRate, unsigned long framesPerBuffer,
+ double *inputLatency, double *outputLatency )
+{
+ PaError result = paNoError;
+ int duplex = stream->capture && stream->playback;
+ unsigned long framesPerHostBuffer = 0;
+
+ /* We should request full duplex first thing after opening the device */
+ if( duplex && stream->sharedDevice )
+ ENSURE_( ioctl( stream->capture->fd, SNDCTL_DSP_SETDUPLEX, 0 ), paUnanticipatedHostError );
+
+ if( stream->capture )
+ {
+ PaOssStreamComponent *component = stream->capture;
+ PaOssStreamComponent_Configure( component, sampleRate, framesPerBuffer, StreamMode_In, NULL );
+
+ assert( component->hostChannelCount > 0 );
+ assert( component->hostFrames > 0 );
+
+ *inputLatency = component->hostFrames * (component->numBufs - 1) / sampleRate;
+ }
+ if( stream->playback )
+ {
+ PaOssStreamComponent *component = stream->playback, *master = stream->sharedDevice ? stream->capture : NULL;
+ PA_ENSURE( PaOssStreamComponent_Configure( component, sampleRate, framesPerBuffer, StreamMode_Out,
+ master ) );
+
+ assert( component->hostChannelCount > 0 );
+ assert( component->hostFrames > 0 );
+
+ *outputLatency = component->hostFrames * (component->numBufs - 1) / sampleRate;
+ }
+
+ if( duplex )
+ framesPerHostBuffer = PA_MIN( stream->capture->hostFrames, stream->playback->hostFrames );
+ else if( stream->capture )
+ framesPerHostBuffer = stream->capture->hostFrames;
+ else if( stream->playback )
+ framesPerHostBuffer = stream->playback->hostFrames;
+
+ stream->framesPerHostBuffer = framesPerHostBuffer;
+ stream->pollTimeout = (int) ceil( 1e6 * framesPerHostBuffer / sampleRate ); /* Period in usecs, rounded up */
+
+ stream->streamRepresentation.streamInfo.sampleRate = sampleRate;
+
+error:
+ return result;
+}
+
+/* see pa_hostapi.h for a list of validity guarantees made about OpenStream parameters */
+
+/** Open a PA OSS stream.
+ *
+ * Aspect StreamChannels: The number of channels is specified per direction (in/out), and can differ between the
+ * two. However, OSS doesn't support separate configuration spaces for capture and playback so if both
+ * directions are the same device we will demand the same number of channels. The number of channels can range
+ * from 1 to the maximum supported by the device.
+ *
+ * Aspect BufferSettings: If framesPerBuffer != paFramesPerBufferUnspecified the number of frames per callback
+ * must reflect this, in addition the host latency per device should approximate the corresponding
+ * suggestedLatency. Based on these constraints we need to determine a number of frames per host buffer that
+ * both capture and playback can agree on (they can be different devices), the buffer processor can adapt
+ * between host and user buffer size, but the ratio should preferably be integral.
+ */
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData )
+{
+ PaError result = paNoError;
+ PaOSSHostApiRepresentation *ossHostApi = (PaOSSHostApiRepresentation*)hostApi;
+ PaOssStream *stream = NULL;
+ int inputChannelCount = 0, outputChannelCount = 0;
+ PaSampleFormat inputSampleFormat = 0, outputSampleFormat = 0, inputHostFormat = 0, outputHostFormat = 0;
+ const PaDeviceInfo *inputDeviceInfo = 0, *outputDeviceInfo = 0;
+ int bpInitialized = 0;
+ double inLatency, outLatency;
+
+ /* validate platform specific flags */
+ if( (streamFlags & paPlatformSpecificFlags) != 0 )
+ return paInvalidFlag; /* unexpected platform specific flag */
+
+ if( inputParameters )
+ {
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+ inputDeviceInfo = hostApi->deviceInfos[inputParameters->device];
+ PA_ENSURE( ValidateParameters( inputParameters, inputDeviceInfo, StreamMode_In ) );
+
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+ }
+ if( outputParameters )
+ {
+ outputDeviceInfo = hostApi->deviceInfos[outputParameters->device];
+ PA_ENSURE( ValidateParameters( outputParameters, outputDeviceInfo, StreamMode_Out ) );
+
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+ }
+
+ /* Aspect StreamChannels: We currently demand that number of input and output channels are the same, if the same
+ * device is opened for both directions
+ */
+ if( inputChannelCount > 0 && outputChannelCount > 0 )
+ {
+ if( inputParameters->device == outputParameters->device )
+ {
+ if( inputParameters->channelCount != outputParameters->channelCount )
+ return paInvalidChannelCount;
+ }
+ }
+
+ /* allocate and do basic initialization of the stream structure */
+ PA_UNLESS( stream = (PaOssStream*)PaUtil_AllocateMemory( sizeof(PaOssStream) ), paInsufficientMemory );
+ PA_ENSURE( PaOssStream_Initialize( stream, inputParameters, outputParameters, streamCallback, userData, streamFlags, ossHostApi ) );
+
+ PA_ENSURE( PaOssStream_Configure( stream, sampleRate, framesPerBuffer, &inLatency, &outLatency ) );
+
+ PaUtil_InitializeCpuLoadMeasurer( &stream->cpuLoadMeasurer, sampleRate );
+
+ if( inputParameters )
+ {
+ inputHostFormat = stream->capture->hostFormat;
+ stream->streamRepresentation.streamInfo.inputLatency = inLatency +
+ PaUtil_GetBufferProcessorInputLatency( &stream->bufferProcessor ) / sampleRate;
+ }
+ if( outputParameters )
+ {
+ outputHostFormat = stream->playback->hostFormat;
+ stream->streamRepresentation.streamInfo.outputLatency = outLatency +
+ PaUtil_GetBufferProcessorOutputLatency( &stream->bufferProcessor ) / sampleRate;
+ }
+
+ /* Initialize buffer processor with fixed host buffer size.
+ * Aspect StreamSampleFormat: Here we commit the user and host sample formats, PA infrastructure will
+ * convert between the two.
+ */
+ PA_ENSURE( PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
+ inputChannelCount, inputSampleFormat, inputHostFormat, outputChannelCount, outputSampleFormat,
+ outputHostFormat, sampleRate, streamFlags, framesPerBuffer, stream->framesPerHostBuffer,
+ paUtilFixedHostBufferSize, streamCallback, userData ) );
+ bpInitialized = 1;
+
+ *s = (PaStream*)stream;
+
+ return result;
+
+error:
+ if( bpInitialized )
+ PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
+ if( stream )
+ PaOssStream_Terminate( stream );
+
+ return result;
+}
+
+/*! Poll on I/O filedescriptors.
+
+ Poll till we've determined there's data for read or write. In the full-duplex case,
+ we don't want to hang around forever waiting for either input or output frames, so
+ whenever we have a timed out filedescriptor we check if we're nearing under/overrun
+ for the other direction (critical limit set at one buffer). If so, we exit the waiting
+ state, and go on with what we got. We align the number of frames on a host buffer
+ boundary because it is possible that the buffer size differs for the two directions and
+ the host buffer size is a compromise between the two.
+ */
+static PaError PaOssStream_WaitForFrames( PaOssStream *stream, unsigned long *frames )
+{
+ PaError result = paNoError;
+ int pollPlayback = 0, pollCapture = 0;
+ int captureAvail = INT_MAX, playbackAvail = INT_MAX, commonAvail;
+ audio_buf_info bufInfo;
+ /* int ofs = 0, nfds = stream->nfds; */
+ fd_set readFds, writeFds;
+ int nfds = 0;
+ struct timeval selectTimeval = {0, 0};
+ unsigned long timeout = stream->pollTimeout; /* In usecs */
+ int captureFd = -1, playbackFd = -1;
+
+ assert( stream );
+ assert( frames );
+
+ if( stream->capture )
+ {
+ pollCapture = 1;
+ captureFd = stream->capture->fd;
+ /* stream->capture->pfd->events = POLLIN; */
+ }
+ if( stream->playback )
+ {
+ pollPlayback = 1;
+ playbackFd = stream->playback->fd;
+ /* stream->playback->pfd->events = POLLOUT; */
+ }
+
+ FD_ZERO( &readFds );
+ FD_ZERO( &writeFds );
+
+ while( pollPlayback || pollCapture )
+ {
+ pthread_testcancel();
+
+ /* select may modify the timeout parameter */
+ selectTimeval.tv_usec = timeout;
+ nfds = 0;
+
+ if( pollCapture )
+ {
+ FD_SET( captureFd, &readFds );
+ nfds = captureFd + 1;
+ }
+ if( pollPlayback )
+ {
+ FD_SET( playbackFd, &writeFds );
+ nfds = PA_MAX( nfds, playbackFd + 1 );
+ }
+ ENSURE_( select( nfds, &readFds, &writeFds, NULL, &selectTimeval ), paUnanticipatedHostError );
+ /*
+ if( poll( stream->pfds + ofs, nfds, stream->pollTimeout ) < 0 )
+ {
+
+ ENSURE_( -1, paUnanticipatedHostError );
+ }
+ */
+ pthread_testcancel();
+
+ if( pollCapture )
+ {
+ if( FD_ISSET( captureFd, &readFds ) )
+ {
+ FD_CLR( captureFd, &readFds );
+ pollCapture = 0;
+ }
+ /*
+ if( stream->capture->pfd->revents & POLLIN )
+ {
+ --nfds;
+ ++ofs;
+ pollCapture = 0;
+ }
+ */
+ else if( stream->playback ) /* Timed out, go on with playback? */
+ {
+ /*PA_DEBUG(( "%s: Trying to poll again for capture frames, pollTimeout: %d\n",
+ __FUNCTION__, stream->pollTimeout ));*/
+ }
+ }
+ if( pollPlayback )
+ {
+ if( FD_ISSET( playbackFd, &writeFds ) )
+ {
+ FD_CLR( playbackFd, &writeFds );
+ pollPlayback = 0;
+ }
+ /*
+ if( stream->playback->pfd->revents & POLLOUT )
+ {
+ --nfds;
+ pollPlayback = 0;
+ }
+ */
+ else if( stream->capture ) /* Timed out, go on with capture? */
+ {
+ /*PA_DEBUG(( "%s: Trying to poll again for playback frames, pollTimeout: %d\n\n",
+ __FUNCTION__, stream->pollTimeout ));*/
+ }
+ }
+ }
+
+ if( stream->capture )
+ {
+ ENSURE_( ioctl( captureFd, SNDCTL_DSP_GETISPACE, &bufInfo ), paUnanticipatedHostError );
+ captureAvail = bufInfo.fragments * stream->capture->hostFrames;
+ if( !captureAvail )
+ PA_DEBUG(( "%s: captureAvail: 0\n", __FUNCTION__ ));
+
+ captureAvail = captureAvail == 0 ? INT_MAX : captureAvail; /* Disregard if zero */
+ }
+ if( stream->playback )
+ {
+ ENSURE_( ioctl( playbackFd, SNDCTL_DSP_GETOSPACE, &bufInfo ), paUnanticipatedHostError );
+ playbackAvail = bufInfo.fragments * stream->playback->hostFrames;
+ if( !playbackAvail )
+ {
+ PA_DEBUG(( "%s: playbackAvail: 0\n", __FUNCTION__ ));
+ }
+
+ playbackAvail = playbackAvail == 0 ? INT_MAX : playbackAvail; /* Disregard if zero */
+ }
+
+ commonAvail = PA_MIN( captureAvail, playbackAvail );
+ if( commonAvail == INT_MAX )
+ commonAvail = 0;
+ commonAvail -= commonAvail % stream->framesPerHostBuffer;
+
+ assert( commonAvail != INT_MAX );
+ assert( commonAvail >= 0 );
+ *frames = commonAvail;
+
+error:
+ return result;
+}
+
+/** Prepare stream for capture/playback.
+ *
+ * In order to synchronize capture and playback properly we use the SETTRIGGER command.
+ */
+static PaError PaOssStream_Prepare( PaOssStream *stream )
+{
+ PaError result = paNoError;
+ int enableBits = 0;
+
+ if( stream->triggered )
+ return result;
+
+ if( stream->playback )
+ {
+ size_t bufSz = PaOssStreamComponent_BufferSize( stream->playback );
+ memset( stream->playback->buffer, 0, bufSz );
+
+ /* Looks like we have to turn off blocking before we try this, but if we don't fill the buffer
+ * OSS will complain. */
+ PA_ENSURE( ModifyBlocking( stream->playback->fd, 0 ) );
+ while (1)
+ {
+ if( write( stream->playback->fd, stream->playback->buffer, bufSz ) < 0 )
+ break;
+ }
+ PA_ENSURE( ModifyBlocking( stream->playback->fd, 1 ) );
+ }
+
+ if( stream->sharedDevice )
+ {
+ enableBits = PCM_ENABLE_INPUT | PCM_ENABLE_OUTPUT;
+ ENSURE_( ioctl( stream->capture->fd, SNDCTL_DSP_SETTRIGGER, &enableBits ), paUnanticipatedHostError );
+ }
+ else
+ {
+ if( stream->capture )
+ {
+ enableBits = PCM_ENABLE_INPUT;
+ ENSURE_( ioctl( stream->capture->fd, SNDCTL_DSP_SETTRIGGER, &enableBits ), paUnanticipatedHostError );
+ }
+ if( stream->playback )
+ {
+ enableBits = PCM_ENABLE_OUTPUT;
+ ENSURE_( ioctl( stream->playback->fd, SNDCTL_DSP_SETTRIGGER, &enableBits ), paUnanticipatedHostError );
+ }
+ }
+
+ /* Ok, we have triggered the stream */
+ stream->triggered = 1;
+
+error:
+ return result;
+}
+
+/** Stop audio processing
+ *
+ */
+static PaError PaOssStream_Stop( PaOssStream *stream, int abort )
+{
+ PaError result = paNoError;
+
+ /* Looks like the only safe way to stop audio without reopening the device is SNDCTL_DSP_POST.
+ * Also disable capture/playback till the stream is started again */
+ if( stream->capture )
+ {
+ ENSURE_( ioctl( stream->capture->fd, SNDCTL_DSP_POST, 0 ), paUnanticipatedHostError );
+ }
+ if( stream->playback && !stream->sharedDevice )
+ {
+ ENSURE_( ioctl( stream->playback->fd, SNDCTL_DSP_POST, 0 ), paUnanticipatedHostError );
+ }
+
+error:
+ return result;
+}
+
+/** Clean up after thread exit.
+ *
+ * Aspect StreamState: If the user has registered a streamFinishedCallback it will be called here
+ */
+static void OnExit( void *data )
+{
+ PaOssStream *stream = (PaOssStream *) data;
+ assert( data );
+
+ PaUtil_ResetCpuLoadMeasurer( &stream->cpuLoadMeasurer );
+
+ PaOssStream_Stop( stream, stream->callbackAbort );
+
+ PA_DEBUG(( "OnExit: Stoppage\n" ));
+
+ /* Eventually notify user all buffers have played */
+ if( stream->streamRepresentation.streamFinishedCallback )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+
+ stream->callbackAbort = 0; /* Clear state */
+ stream->isActive = 0;
+}
+
+static PaError SetUpBuffers( PaOssStream *stream, unsigned long framesAvail )
+{
+ PaError result = paNoError;
+
+ if( stream->capture )
+ {
+ PaUtil_SetInterleavedInputChannels( &stream->bufferProcessor, 0, stream->capture->buffer,
+ stream->capture->hostChannelCount );
+ PaUtil_SetInputFrameCount( &stream->bufferProcessor, framesAvail );
+ }
+ if( stream->playback )
+ {
+ PaUtil_SetInterleavedOutputChannels( &stream->bufferProcessor, 0, stream->playback->buffer,
+ stream->playback->hostChannelCount );
+ PaUtil_SetOutputFrameCount( &stream->bufferProcessor, framesAvail );
+ }
+
+ return result;
+}
+
+/** Thread procedure for callback processing.
+ *
+ * Aspect StreamState: StartStream will wait on this to initiate audio processing, useful in case the
+ * callback should be used for buffer priming. When the stream is cancelled a separate function will
+ * take care of the transition to the Callback Finished state (the stream isn't considered Stopped
+ * before StopStream() or AbortStream() are called).
+ */
+static void *PaOSS_AudioThreadProc( void *userData )
+{
+ PaError result = paNoError;
+ PaOssStream *stream = (PaOssStream*)userData;
+ unsigned long framesAvail, framesProcessed;
+ int callbackResult = paContinue;
+ int triggered = stream->triggered; /* See if SNDCTL_DSP_TRIGGER has been issued already */
+ int initiateProcessing = triggered; /* Already triggered? */
+ PaStreamCallbackFlags cbFlags = 0; /* We might want to keep state across iterations */
+
+ /*
+#if ( SOUND_VERSION > 0x030904 )
+ audio_errinfo errinfo;
+#endif
+*/
+
+ assert( stream );
+
+ pthread_cleanup_push( &OnExit, stream ); /* Execute OnExit when exiting */
+
+ /* The first time the stream is started we use SNDCTL_DSP_TRIGGER to accurately start capture and
+ * playback in sync, when the stream is restarted after being stopped we simply start by reading/
+ * writing.
+ */
+ PA_ENSURE( PaOssStream_Prepare( stream ) );
+
+ /* If we are to initiate processing implicitly by reading/writing data, we start off in blocking mode */
+ if( initiateProcessing )
+ {
+ /* Make sure devices are in blocking mode */
+ if( stream->capture )
+ ModifyBlocking( stream->capture->fd, 1 );
+ if( stream->playback )
+ ModifyBlocking( stream->playback->fd, 1 );
+ }
+
+ while( 1 )
+ {
+ PaStreamCallbackTimeInfo timeInfo = {0,0,0}; /* TODO: IMPLEMENT ME */
+
+ pthread_testcancel();
+
+ if( stream->callbackStop && callbackResult == paContinue )
+ {
+ PA_DEBUG(( "Setting callbackResult to paComplete\n" ));
+ callbackResult = paComplete;
+ }
+
+ /* Aspect StreamState: Because of the messy OSS scheme we can't explicitly trigger device start unless
+ * the stream has been recently started, we will have to go right ahead and read/write in blocking
+ * fashion to trigger operation. Therefore we begin with processing one host buffer before we switch
+ * to non-blocking mode.
+ */
+ if( !initiateProcessing )
+ {
+ PA_ENSURE( PaOssStream_WaitForFrames( stream, &framesAvail ) ); /* Wait on available frames */
+ assert( framesAvail % stream->framesPerHostBuffer == 0 );
+ }
+ else
+ {
+ framesAvail = stream->framesPerHostBuffer;
+ }
+
+ while( framesAvail > 0 )
+ {
+ unsigned long frames = framesAvail;
+
+ pthread_testcancel();
+
+ PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
+
+ /* Read data */
+ if ( stream->capture )
+ {
+ PA_ENSURE( PaOssStreamComponent_Read( stream->capture, &frames ) );
+ assert( frames == framesAvail );
+ }
+
+#if ( SOUND_VERSION >= 0x030904 )
+ /*
+ Check with OSS to see if there have been any under/overruns
+ since last time we checked.
+ */
+ /*
+ if( ioctl( stream->deviceHandle, SNDCTL_DSP_GETERROR, &errinfo ) >= 0 )
+ {
+ if( errinfo.play_underruns )
+ cbFlags |= paOutputUnderflow ;
+ if( errinfo.record_underruns )
+ cbFlags |= paInputUnderflow ;
+ }
+ else
+ PA_DEBUG(( "SNDCTL_DSP_GETERROR command failed: %s\n", strerror( errno ) ));
+ */
+#endif
+
+ PaUtil_BeginBufferProcessing( &stream->bufferProcessor, &timeInfo,
+ cbFlags );
+ cbFlags = 0;
+ PA_ENSURE( SetUpBuffers( stream, framesAvail ) );
+
+ framesProcessed = PaUtil_EndBufferProcessing( &stream->bufferProcessor,
+ &callbackResult );
+ assert( framesProcessed == framesAvail );
+ PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, framesProcessed );
+
+ if ( stream->playback )
+ {
+ frames = framesAvail;
+
+ PA_ENSURE( PaOssStreamComponent_Write( stream->playback, &frames ) );
+ assert( frames == framesAvail );
+
+ /* TODO: handle bytesWritten != bytesRequested (slippage?) */
+ }
+
+ framesAvail -= framesProcessed;
+ stream->framesProcessed += framesProcessed;
+
+ if( callbackResult != paContinue )
+ break;
+ }
+
+ if( initiateProcessing || !triggered )
+ {
+ /* Non-blocking */
+ if( stream->capture )
+ PA_ENSURE( ModifyBlocking( stream->capture->fd, 0 ) );
+ if( stream->playback && !stream->sharedDevice )
+ PA_ENSURE( ModifyBlocking( stream->playback->fd, 0 ) );
+
+ initiateProcessing = 0;
+ sem_post( &stream->semaphore );
+ }
+
+ if( callbackResult != paContinue )
+ {
+ stream->callbackAbort = callbackResult == paAbort;
+ if( stream->callbackAbort || PaUtil_IsBufferProcessorOutputEmpty( &stream->bufferProcessor ) )
+ break;
+ }
+ }
+
+ pthread_cleanup_pop( 1 );
+
+error:
+ pthread_exit( NULL );
+}
+
+/** Close the stream.
+ *
+ */
+static PaError CloseStream( PaStream* s )
+{
+ PaError result = paNoError;
+ PaOssStream *stream = (PaOssStream*)s;
+
+ assert( stream );
+
+ PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
+ PaOssStream_Terminate( stream );
+
+ return result;
+}
+
+/** Start the stream.
+ *
+ * Aspect StreamState: After returning, the stream shall be in the Active state, implying that an eventual
+ * callback will be repeatedly called in a separate thread. If a separate thread is started this function
+ * will block untill it has started processing audio, otherwise audio processing is started directly.
+ */
+static PaError StartStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaOssStream *stream = (PaOssStream*)s;
+
+ stream->isActive = 1;
+ stream->isStopped = 0;
+ stream->lastPosPtr = 0;
+ stream->lastStreamBytes = 0;
+ stream->framesProcessed = 0;
+
+ /* only use the thread for callback streams */
+ if( stream->bufferProcessor.streamCallback )
+ {
+ PA_ENSURE( PaUtil_StartThreading( &stream->threading, &PaOSS_AudioThreadProc, stream ) );
+ sem_wait( &stream->semaphore );
+ }
+ else
+ PA_ENSURE( PaOssStream_Prepare( stream ) );
+
+error:
+ return result;
+}
+
+static PaError RealStop( PaOssStream *stream, int abort )
+{
+ PaError result = paNoError;
+
+ if( stream->callbackMode )
+ {
+ if( abort )
+ stream->callbackAbort = 1;
+ else
+ stream->callbackStop = 1;
+
+ PA_ENSURE( PaUtil_CancelThreading( &stream->threading, !abort, NULL ) );
+
+ stream->callbackStop = stream->callbackAbort = 0;
+ }
+ else
+ PA_ENSURE( PaOssStream_Stop( stream, abort ) );
+
+ stream->isStopped = 1;
+
+error:
+ return result;
+}
+
+/** Stop the stream.
+ *
+ * Aspect StreamState: This will cause the stream to transition to the Stopped state, playing all enqueued
+ * buffers.
+ */
+static PaError StopStream( PaStream *s )
+{
+ return RealStop( (PaOssStream *)s, 0 );
+}
+
+/** Abort the stream.
+ *
+ * Aspect StreamState: This will cause the stream to transition to the Stopped state, discarding all enqueued
+ * buffers. Note that the buffers are not currently correctly discarded, this is difficult without closing
+ * the OSS device.
+ */
+static PaError AbortStream( PaStream *s )
+{
+ return RealStop( (PaOssStream *)s, 1 );
+}
+
+/** Is the stream in the Stopped state.
+ *
+ */
+static PaError IsStreamStopped( PaStream *s )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+
+ return (stream->isStopped);
+}
+
+/** Is the stream in the Active state.
+ *
+ */
+static PaError IsStreamActive( PaStream *s )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+
+ return (stream->isActive);
+}
+
+static PaTime GetStreamTime( PaStream *s )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+ count_info info;
+ int delta;
+
+ if( stream->playback ) {
+ if( ioctl( stream->playback->fd, SNDCTL_DSP_GETOPTR, &info) == 0 ) {
+ delta = ( info.bytes - stream->lastPosPtr ) & 0x000FFFFF;
+ return ( stream->lastStreamBytes + delta) / PaOssStreamComponent_FrameSize( stream->playback ) / stream->sampleRate;
+ }
+ }
+ else {
+ if (ioctl( stream->capture->fd, SNDCTL_DSP_GETIPTR, &info) == 0) {
+ delta = (info.bytes - stream->lastPosPtr) & 0x000FFFFF;
+ return ( stream->lastStreamBytes + delta) / PaOssStreamComponent_FrameSize( stream->capture ) / stream->sampleRate;
+ }
+ }
+
+ /* the ioctl failed, but we can still give a coarse estimate */
+
+ return stream->framesProcessed / stream->sampleRate;
+}
+
+
+static double GetStreamCpuLoad( PaStream* s )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+
+ return PaUtil_GetCpuLoad( &stream->cpuLoadMeasurer );
+}
+
+
+/*
+ As separate stream interfaces are used for blocking and callback
+ streams, the following functions can be guaranteed to only be called
+ for blocking streams.
+*/
+
+
+static PaError ReadStream( PaStream* s,
+ void *buffer,
+ unsigned long frames )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+ int bytesRequested, bytesRead;
+ unsigned long framesRequested;
+ void *userBuffer;
+
+ /* If user input is non-interleaved, PaUtil_CopyInput will manipulate the channel pointers,
+ * so we copy the user provided pointers */
+ if( stream->bufferProcessor.userInputIsInterleaved )
+ userBuffer = buffer;
+ else /* Copy channels into local array */
+ {
+ userBuffer = stream->capture->userBuffers;
+ memcpy( (void *)userBuffer, buffer, sizeof (void *) * stream->capture->userChannelCount );
+ }
+
+ while( frames )
+ {
+ framesRequested = PA_MIN( frames, stream->capture->hostFrames );
+
+ bytesRequested = framesRequested * PaOssStreamComponent_FrameSize( stream->capture );
+ bytesRead = read( stream->capture->fd, stream->capture->buffer, bytesRequested );
+ if ( bytesRequested != bytesRead )
+ return paUnanticipatedHostError;
+
+ PaUtil_SetInputFrameCount( &stream->bufferProcessor, stream->capture->hostFrames );
+ PaUtil_SetInterleavedInputChannels( &stream->bufferProcessor, 0, stream->capture->buffer, stream->capture->hostChannelCount );
+ PaUtil_CopyInput( &stream->bufferProcessor, &userBuffer, framesRequested );
+ frames -= framesRequested;
+ }
+ return paNoError;
+}
+
+
+static PaError WriteStream( PaStream *s, const void *buffer, unsigned long frames )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+ int bytesRequested, bytesWritten;
+ unsigned long framesConverted;
+ const void *userBuffer;
+
+ /* If user output is non-interleaved, PaUtil_CopyOutput will manipulate the channel pointers,
+ * so we copy the user provided pointers */
+ if( stream->bufferProcessor.userOutputIsInterleaved )
+ userBuffer = buffer;
+ else
+ {
+ /* Copy channels into local array */
+ userBuffer = stream->playback->userBuffers;
+ memcpy( (void *)userBuffer, buffer, sizeof (void *) * stream->playback->userChannelCount );
+ }
+
+ while( frames )
+ {
+ PaUtil_SetOutputFrameCount( &stream->bufferProcessor, stream->playback->hostFrames );
+ PaUtil_SetInterleavedOutputChannels( &stream->bufferProcessor, 0, stream->playback->buffer, stream->playback->hostChannelCount );
+
+ framesConverted = PaUtil_CopyOutput( &stream->bufferProcessor, &userBuffer, frames );
+ frames -= framesConverted;
+
+ bytesRequested = framesConverted * PaOssStreamComponent_FrameSize( stream->playback );
+ bytesWritten = write( stream->playback->fd, stream->playback->buffer, bytesRequested );
+
+ if ( bytesRequested != bytesWritten )
+ return paUnanticipatedHostError;
+ }
+ return paNoError;
+}
+
+
+static signed long GetStreamReadAvailable( PaStream* s )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+ audio_buf_info info;
+
+ if( ioctl( stream->capture->fd, SNDCTL_DSP_GETISPACE, &info ) < 0 )
+ return paUnanticipatedHostError;
+ return info.fragments * stream->capture->hostFrames;
+}
+
+
+/* TODO: Compute number of allocated bytes somewhere else, can we use ODELAY with capture */
+static signed long GetStreamWriteAvailable( PaStream* s )
+{
+ PaOssStream *stream = (PaOssStream*)s;
+ int delay = 0;
+
+ if( ioctl( stream->playback->fd, SNDCTL_DSP_GETODELAY, &delay ) < 0 )
+ return paUnanticipatedHostError;
+
+ return (PaOssStreamComponent_BufferSize( stream->playback ) - delay) / PaOssStreamComponent_FrameSize( stream->playback );
+}
+
diff --git a/portaudio/pa_unix_oss/recplay.c b/portaudio/pa_unix_oss/recplay.c
new file mode 100644
index 0000000000000000000000000000000000000000..9d4c78cfa3073a7367c7d3d24dcc5db63e556728
--- /dev/null
+++ b/portaudio/pa_unix_oss/recplay.c
@@ -0,0 +1,114 @@
+/*
+ * recplay.c
+ * Phil Burk
+ * Minimal record and playback test.
+ *
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#ifndef __STDC__
+/* #include <getopt.h> */
+#endif /* __STDC__ */
+#include <fcntl.h>
+#ifdef __STDC__
+#include <string.h>
+#else /* __STDC__ */
+#include <strings.h>
+#endif /* __STDC__ */
+#include <sys/soundcard.h>
+
+#define NUM_BYTES (64*1024)
+#define BLOCK_SIZE (4*1024)
+
+#define AUDIO "/dev/dsp"
+
+char buffer[NUM_BYTES];
+
+int audioDev = 0;
+
+main (int argc, char *argv[])
+{
+ int numLeft;
+ char *ptr;
+ int num;
+ int samplesize;
+
+ /********** RECORD ********************/
+ /* Open audio device. */
+ audioDev = open (AUDIO, O_RDONLY, 0);
+ if (audioDev == -1)
+ {
+ perror (AUDIO);
+ exit (-1);
+ }
+
+ /* Set to 16 bit samples. */
+ samplesize = 16;
+ ioctl(audioDev, SNDCTL_DSP_SAMPLESIZE, &samplesize);
+ if (samplesize != 16)
+ {
+ perror("Unable to set the sample size.");
+ exit(-1);
+ }
+
+ /* Record in blocks */
+ printf("Begin recording.\n");
+ numLeft = NUM_BYTES;
+ ptr = buffer;
+ while( numLeft >= BLOCK_SIZE )
+ {
+ if ( (num = read (audioDev, ptr, BLOCK_SIZE)) < 0 )
+ {
+ perror (AUDIO);
+ exit (-1);
+ }
+ else
+ {
+ printf("Read %d bytes\n", num);
+ ptr += num;
+ numLeft -= num;
+ }
+ }
+
+ close( audioDev );
+
+ /********** PLAYBACK ********************/
+ /* Open audio device for writing. */
+ audioDev = open (AUDIO, O_WRONLY, 0);
+ if (audioDev == -1)
+ {
+ perror (AUDIO);
+ exit (-1);
+ }
+
+ /* Set to 16 bit samples. */
+ samplesize = 16;
+ ioctl(audioDev, SNDCTL_DSP_SAMPLESIZE, &samplesize);
+ if (samplesize != 16)
+ {
+ perror("Unable to set the sample size.");
+ exit(-1);
+ }
+
+ /* Play in blocks */
+ printf("Begin playing.\n");
+ numLeft = NUM_BYTES;
+ ptr = buffer;
+ while( numLeft >= BLOCK_SIZE )
+ {
+ if ( (num = write (audioDev, ptr, BLOCK_SIZE)) < 0 )
+ {
+ perror (AUDIO);
+ exit (-1);
+ }
+ else
+ {
+ printf("Wrote %d bytes\n", num);
+ ptr += num;
+ numLeft -= num;
+ }
+ }
+
+ close( audioDev );
+}
diff --git a/src/Makefile.am b/src/Makefile.am
index 72a960941931155a163a0e356e6f89ea1cdcfd79..2efb0bc25d04a6725fa893d2b8b46f305ea0c066 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,5 +1,7 @@
libexec_PROGRAMS = sflphoned
bin_SCRIPTS = sflphone
+lib_LTLIBRARIES = libsflphone.la
+
if USE_ZEROCONF
ZEROCONFDIR = zeroconf
@@ -19,11 +21,25 @@ sflphoned_SOURCES = call.cpp eventthread.cpp main.cpp sipvoiplink.cpp voIPLi
sipvoiplink.h user_cfg.h call.h voIPLink.h sipcall.h \
observer.cpp
+
sflphoned_CXXFLAGS = -DPREFIX=\"$(prefix)\" -DPROGSHAREDIR=\"${datadir}/sflphone\" $(ZEROCONFFLAGS)
#sflphoned_LDFLAGS = -static
-sflphoned_LDADD = gui/libguiframework.la audio/libaudio.la ../stund/libstun.la ../utilspp/libutilspp.la $(top_builddir)/exosip2/libeXosip2.la $(SFLPHONE_LIBS) $(ZEROCONFLIB) $(LIB_DNSSD) config/libconfig.la
+sflphoned_LDADD = ./libsflphone.la $(SFLPHONE_LIBS) $(ZEROCONFLIB) $(LIB_DNSSD)
#KDE_CXXFLAGS = $(USE_EXCEPTIONS)
AM_CPPFLAGS = -I$(top_srcdir)/include -I$(srcdir)/audio/pacpp/include $(libccext2_CFLAGS) $(libccgnu2_CFLAGS) $(portaudio_CFLAGS)
+libsflphone_la_LDFLAGS= -version-info 0:1:0
+libsflphone_la_LIBADD = \
+ $(top_builddir)/exosip2/libeXosip2.la \
+ $(top_builddir)/portaudio/libportaudio.la \
+ $(top_builddir)/stund/libstun.la \
+ $(top_builddir)/utilspp/libutilspp.la \
+ ./audio/libaudio.la \
+ ./gui/libguiframework.la \
+ ./config/libconfig.la
+
+libsflphone_la_SOURCES =
+
+
noinst_HEADERS = observer.h
diff --git a/src/audio/audiolayer.cpp b/src/audio/audiolayer.cpp
index 0d39679dfc46881bd3a6fe1f37bb8a9d293ba511..8cfc35a595268042a7e518df834bc7af30908de9 100644
--- a/src/audio/audiolayer.cpp
+++ b/src/audio/audiolayer.cpp
@@ -18,8 +18,6 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#ifdef AUDIO_PORTAUDIO
-
#include <stdio.h>
#include <stdlib.h>
@@ -287,5 +285,4 @@ AudioLayer::audioCallback (const void *inputBuffer, void *outputBuffer,
return paContinue;
}
-#endif // defined(AUDIO_PORTAUDIO)
diff --git a/src/audio/audiolayer.h b/src/audio/audiolayer.h
index 2fe4632e0a71643bc9d065caef911f4e24f09dc2..3a45b44be87fbf2bce0578bc314771724c36b029 100644
--- a/src/audio/audiolayer.h
+++ b/src/audio/audiolayer.h
@@ -18,8 +18,6 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#if defined(AUDIO_PORTAUDIO)
-
#ifndef _AUDIO_LAYER_H
#define _AUDIO_LAYER_H
@@ -81,4 +79,3 @@ private:
#endif // _AUDIO_LAYER_H_
-#endif // defined(AUDIO_PORTAUDIO)
diff --git a/src/managerimpl.cpp b/src/managerimpl.cpp
index 677b7dee4157da8ec12bb59e9f4ac8eba008559f..f64a3497b59e0b968de4bb67ffaeeb95a865c2a6 100644
--- a/src/managerimpl.cpp
+++ b/src/managerimpl.cpp
@@ -1272,16 +1272,12 @@ ManagerImpl::unloadAudioCodec()
void
ManagerImpl::initAudioDriver(void)
{
-#if defined(AUDIO_PORTAUDIO)
try {
_debugInit("AudioLayer Creation");
_audiodriverPA = new AudioLayer();
} catch(...) {
throw;
}
-#else
-# error You must define one AUDIO driver to use.
-#endif
}
/**
@@ -1290,7 +1286,6 @@ ManagerImpl::initAudioDriver(void)
void
ManagerImpl::selectAudioDriver (void)
{
-#if defined(AUDIO_PORTAUDIO)
try {
int noDevice = getConfigInt(AUDIO, DRIVER_NAME);
int noDeviceIn = getConfigInt(AUDIO, DRIVER_NAME_IN);
@@ -1323,9 +1318,6 @@ ManagerImpl::selectAudioDriver (void)
} catch(...) {
throw;
}
-#else
-# error You must define one AUDIO driver to use.
-#endif
}
/**