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iaxvoiplink.cpp

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    iaxvoiplink.cpp 25.35 KiB
    /*
     *  Copyright (C) 2006-2007 Savoir-Faire Linux inc.
     *  Author: Alexandre Bourget <alexandre.bourget@savoirfairelinux.com>
     *  Author: Yan Morin <yan.morin@savoirfairelinux.com>
     *                                                                              
     *  This program is free software; you can redistribute it and/or modify
     *  it under the terms of the GNU General Public License as published by
     *  the Free Software Foundation; either version 3 of the License, or
     *  (at your option) any later version.
     *                                                                                
     *  This program is distributed in the hope that it will be useful,
     *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     *  GNU General Public License for more details.
     *                                                                              
     *  You should have received a copy of the GNU General Public License
     *  along with this program; if not, write to the Free Software
     *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
     */
    #include "iaxvoiplink.h"
    #include "global.h" // for _debug
    #include "iaxcall.h"
    #include "eventthread.h"
    
    #include "manager.h"
    #include "audio/audiolayer.h"
    
    #include <samplerate.h>
    #include <iax/iax-client.h>
    #include <math.h>
    #include <dlfcn.h>
    
    
    #define IAX_BLOCKING    1
    #define IAX_NONBLOCKING 0
    
    #define IAX_SUCCESS  0
    #define IAX_FAILURE -1
    
    #define RANDOM_IAX_PORT   rand() % 64000 + 1024
    
    // from IAXC : iaxclient.h
    
    #define IAX__20S_8KHZ_MAX   320 //320 samples, IAX packets can have more than 20ms.
    #define IAX__20S_48KHZ_MAX  1920 // 320*6 samples = 1920, 6 = 48000/8000 
    
    #define CHK_VALID_CALL   if (call == NULL) { _debug("IAX: Call doesn't exists\n"); \
                                                 return false; }
    
    
    
    IAXVoIPLink::IAXVoIPLink(const AccountID& accountID)
      : VoIPLink(accountID)
    {
      _evThread = new EventThread(this);
      _regSession = NULL;
      _nextRefreshStamp = 0;
    
      // to get random number for RANDOM_PORT
      srand (time(NULL));
    
      audiolayer = NULL;
    
      _receiveDataDecoded = new int16[IAX__20S_48KHZ_MAX];
      _sendDataEncoded   =  new unsigned char[IAX__20S_8KHZ_MAX];
    
      // we estimate that the number of format after a conversion 8000->48000 is expanded to 6 times
      _dataAudioLayer = new SFLDataFormat[IAX__20S_48KHZ_MAX];
      _floatBuffer8000  = new float32[IAX__20S_8KHZ_MAX];
      _floatBuffer48000 = new float32[IAX__20S_48KHZ_MAX];