Commit 04c27b93 authored by Alexandre Savard's avatar Alexandre Savard
Browse files

[#936] Add .cpp file

parent 10832728
/*
* Copyright (C) 2007-2009 Savoir-Faire Linux inc.
* Author: Alexandre Savard <alexandre.savard@savoirfairelinux.com>
* Author: Emmanuel Milou <emmanuel.milou@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 "audiocodec.h"
#include <cstdio>
#include <speex/speex.h>
#include <speex/speex_preprocess.h>
class Speex : public AudioCodec{
public:
Speex(int payload=0)
: AudioCodec(payload, "speex"),
_speexModePtr(NULL),
_speex_dec_bits(),
_speex_enc_bits(),
_speex_dec_state(),
_speex_enc_state(),
_speex_frame_size(),
_preprocess_state()
{
_clockRate = 32000;
_frameSize = 640; // 20 ms at 16 kHz
_channel = 1;
_bitrate = 0;
_bandwidth = 0;
initSpeex();
}
Speex( const Speex& );
Speex& operator=(const Speex&);
void initSpeex() {
int _samplingRate = 32000;
// 8000 HZ --> Narrow-band mode
// TODO Manage the other modes
_speexModePtr = &speex_wb_mode;
// _speexModePtr = &speex_wb_mode;
// Init the decoder struct
speex_bits_init(&_speex_dec_bits);
_speex_dec_state = speex_decoder_init(_speexModePtr);
// Init the encoder struct
speex_bits_init(&_speex_enc_bits);
_speex_enc_state = speex_encoder_init(_speexModePtr);
speex_encoder_ctl(_speex_enc_state,SPEEX_SET_SAMPLING_RATE,&_clockRate);
speex_decoder_ctl(_speex_dec_state, SPEEX_GET_FRAME_SIZE, &_speex_frame_size);
#ifdef HAVE_SPEEXDSP_LIB
int enable = 1;
int quality = 10;
int complex = 10;
int attenuation = -10;
speex_encoder_ctl(_speex_enc_state, SPEEX_SET_VAD, &enable);
speex_encoder_ctl(_speex_enc_state, SPEEX_SET_DTX, &enable);
speex_encoder_ctl(_speex_enc_state, SPEEX_SET_VBR_QUALITY, &quality);
speex_encoder_ctl(_speex_enc_state, SPEEX_SET_COMPLEXITY, &complex);
// Init the decoder struct
speex_decoder_ctl(_speex_dec_state, SPEEX_GET_FRAME_SIZE, &_speex_frame_size);
// Init the preprocess struct
_preprocess_state = speex_preprocess_state_init(_speex_frame_size,_clockRate);
speex_preprocess_ctl(_preprocess_state, SPEEX_PREPROCESS_SET_DENOISE, &enable);
speex_preprocess_ctl(_preprocess_state, SPEEX_PREPROCESS_SET_NOISE_SUPPRESS, &attenuation);
speex_preprocess_ctl(_preprocess_state, SPEEX_PREPROCESS_SET_VAD, &enable);
speex_preprocess_ctl(_preprocess_state, SPEEX_PREPROCESS_SET_AGC, &enable);
#endif
}
~Speex()
{
terminateSpeex();
}
void terminateSpeex() {
// Destroy the decoder struct
speex_bits_destroy(&_speex_dec_bits);
speex_decoder_destroy(_speex_dec_state);
_speex_dec_state = 0;
// Destroy the encoder struct
speex_bits_destroy(&_speex_enc_bits);
speex_encoder_destroy(_speex_enc_state);
_speex_enc_state = 0;
}
virtual int codecDecode (short *dst, unsigned char *src, unsigned int size)
{
int ratio = 320 / _speex_frame_size;
speex_bits_read_from(&_speex_dec_bits, (char*)src, size);
speex_decode_int(_speex_dec_state, &_speex_dec_bits, dst);
return 4 * _speex_frame_size * ratio;
}
virtual int codecEncode (unsigned char *dst, short *src, unsigned int size)
{
speex_bits_reset(&_speex_enc_bits);
#ifdef HAVE_SPEEXDSP_LIB
speex_preprocess_run(_preprocess_state, src);
#endif
speex_encode_int(_speex_enc_state, src, &_speex_enc_bits);
int nbBytes = speex_bits_write(&_speex_enc_bits, (char*)dst, size);
printf("Codec::codecEncode() nbBytes: %i \n",nbBytes);
return nbBytes;
}
private:
const SpeexMode* _speexModePtr;
SpeexBits _speex_dec_bits;
SpeexBits _speex_enc_bits;
void *_speex_dec_state;
void *_speex_enc_state;
int _speex_frame_size;
SpeexPreprocessState *_preprocess_state;
};
// the class factories
extern "C" AudioCodec* create() {
return new Speex(112);
}
extern "C" void destroy(AudioCodec* a) {
delete a;
}
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