int MastCodec_MPA::set_param_internal( const char* name, const char* value )
{
/* Parameters listed in RFC3555 for audio/MPA:
layer: 1,2,3
samplerate:
mode: "stereo", "joint_stereo", "single_channel", "dual_channel"
bitrate: the data rate for the audio bit stream
ptime: duration of each packet in milliseconds
maxptime: maximum duration of each packet in milliseconds
Example:
audio/MPA;layer=2;mode=stereo;bitrate=160;
*/
if (strcmp(name, "layer")==0) {
int layer = atoi(value);
if (layer!=2) return -2;
} else if (strcmp(name, "mode")==0) {
TWOLAME_MPEG_mode mode;
if (strcmp(value, "stereo")==0) mode = TWOLAME_STEREO;
else if (strcmp(value, "joint_stereo")==0) mode = TWOLAME_JOINT_STEREO;
else if (strcmp(value, "single_channel")==0) mode = TWOLAME_MONO;
else if (strcmp(value, "dual_channel")==0) mode = TWOLAME_DUAL_CHANNEL;
else return -2;
if (twolame_set_mode( this->twolame, mode )) {
MAST_WARNING("Failed to set mode");
}
} else if (strcmp(name, "bitrate")==0) {
int bitrate = atoi(value);
if (twolame_set_bitrate( this->twolame, bitrate )) {
MAST_WARNING("Failed to set bitrate");
} else {
MAST_DEBUG("Set bitrate to %d", bitrate);
}
} else {
// Unsupported parameter
return -1;
}
// Success
return 0;
}
/**
\fn initialize
*/
bool AUDMEncoder_Twolame::initialize(void)
{
int ret;
TWOLAME_MPEG_mode mmode;
uint32_t frequence;
int channels=wavheader.channels;
_twolameOptions = twolame_init();
if (_twolameOptions == NULL)
return 0;
if(channels>2)
{
printf("[TwoLame]Too many channels\n");
return 0;
}
wavheader.byterate=(_config.bitrate*1000)>>3;
_chunk = 1152*channels;
printf("[TwoLame]Incoming :fq : %"PRIu32", channel : %"PRIu32" bitrate: %"PRIu32" \n",
wavheader.frequency,channels,_config.bitrate);
twolame_set_in_samplerate(OPTIONS, wavheader.frequency);
twolame_set_out_samplerate (OPTIONS, wavheader.frequency);
twolame_set_num_channels(OPTIONS, channels);
if(channels==1) mmode=TWOLAME_MONO;
else
mmode = TWOLAME_STEREO;
twolame_set_mode(OPTIONS,mmode);
twolame_set_error_protection(OPTIONS,TRUE);
//toolame_setPadding (options,TRUE);
twolame_set_bitrate (OPTIONS,_config.bitrate);
twolame_set_verbosity(OPTIONS, 2);
if(twolame_init_params(OPTIONS))
{
printf("[TwoLame]Twolame init failed\n");
return false;
}
printf("[TwoLame]Libtoolame successfully initialized\n");
return true;
}
int ExportMP2::Export(AudacityProject *project,
int channels, const wxString &fName,
bool selectionOnly, double t0, double t1, MixerSpec *mixerSpec, const Tags *metadata,
int WXUNUSED(subformat))
{
bool stereo = (channels == 2);
long bitrate = gPrefs->Read(wxT("/FileFormats/MP2Bitrate"), 160);
double rate = project->GetRate();
const TrackList *tracks = project->GetTracks();
wxLogNull logNo; /* temporarily disable wxWidgets error messages */
twolame_options *encodeOptions;
encodeOptions = twolame_init();
twolame_set_in_samplerate(encodeOptions, (int)(rate + 0.5));
twolame_set_out_samplerate(encodeOptions, (int)(rate + 0.5));
twolame_set_bitrate(encodeOptions, bitrate);
twolame_set_num_channels(encodeOptions, stereo ? 2 : 1);
if (twolame_init_params(encodeOptions) != 0)
{
wxMessageBox(_("Cannot export MP2 with this sample rate and bit rate"),
_("Error"), wxICON_STOP);
twolame_close(&encodeOptions);
return false;
}
// Put ID3 tags at beginning of file
if (metadata == NULL)
metadata = project->GetTags();
FileIO outFile(fName, FileIO::Output);
if (!outFile.IsOpened()) {
wxMessageBox(_("Unable to open target file for writing"));
twolame_close(&encodeOptions);
return false;
}
char *id3buffer = NULL;
int id3len;
bool endOfFile;
id3len = AddTags(project, &id3buffer, &endOfFile, metadata);
if (id3len && !endOfFile)
outFile.Write(id3buffer, id3len);
// Values taken from the twolame simple encoder sample
const int pcmBufferSize = 9216 / 2; // number of samples
const int mp2BufferSize = 16384; // bytes
// We allocate a buffer which is twice as big as the
// input buffer, which should always be enough.
// We have to multiply by 4 because one sample is 2 bytes wide!
unsigned char* mp2Buffer = new unsigned char[mp2BufferSize];
const WaveTrackConstArray waveTracks =
tracks->GetWaveTrackConstArray(selectionOnly, false);
int updateResult = eProgressSuccess;
{
auto mixer = CreateMixer(waveTracks,
tracks->GetTimeTrack(),
t0, t1,
stereo ? 2 : 1, pcmBufferSize, true,
rate, int16Sample, true, mixerSpec);
ProgressDialog progress(wxFileName(fName).GetName(),
selectionOnly ?
wxString::Format(_("Exporting selected audio at %ld kbps"), bitrate) :
wxString::Format(_("Exporting entire file at %ld kbps"), bitrate));
while (updateResult == eProgressSuccess) {
sampleCount pcmNumSamples = mixer->Process(pcmBufferSize);
if (pcmNumSamples == 0)
break;
short *pcmBuffer = (short *)mixer->GetBuffer();
int mp2BufferNumBytes = twolame_encode_buffer_interleaved(
encodeOptions,
pcmBuffer,
pcmNumSamples,
mp2Buffer,
mp2BufferSize);
outFile.Write(mp2Buffer, mp2BufferNumBytes);
updateResult = progress.Update(mixer->MixGetCurrentTime() - t0, t1 - t0);
}
}
int mp2BufferNumBytes = twolame_encode_flush(
encodeOptions,
mp2Buffer,
mp2BufferSize);
if (mp2BufferNumBytes > 0)
outFile.Write(mp2Buffer, mp2BufferNumBytes);
twolame_close(&encodeOptions);
delete[] mp2Buffer;
/* Write ID3 tag if it was supposed to be at the end of the file */
if (id3len && endOfFile)
outFile.Write(id3buffer, id3len);
if (id3buffer) {
free(id3buffer);
}
/* Close file */
outFile.Close();
return updateResult;
}
/* set up the encoder state */
static gboolean
gst_two_lame_setup (GstTwoLame * twolame)
{
#define CHECK_ERROR(command) G_STMT_START {\
if ((command) < 0) { \
GST_ERROR_OBJECT (twolame, "setup failed: " G_STRINGIFY (command)); \
return FALSE; \
} \
}G_STMT_END
int retval;
GstCaps *allowed_caps;
GST_DEBUG_OBJECT (twolame, "starting setup");
/* check if we're already setup; if we are, we might want to check
* if this initialization is compatible with the previous one */
/* FIXME: do this */
if (twolame->setup) {
GST_WARNING_OBJECT (twolame, "already setup");
twolame->setup = FALSE;
}
twolame->glopts = twolame_init ();
if (twolame->glopts == NULL)
return FALSE;
/* copy the parameters over */
twolame_set_in_samplerate (twolame->glopts, twolame->samplerate);
/* let twolame choose default samplerate unless outgoing sample rate is fixed */
allowed_caps = gst_pad_get_allowed_caps (twolame->srcpad);
if (allowed_caps != NULL) {
GstStructure *structure;
gint samplerate;
structure = gst_caps_get_structure (allowed_caps, 0);
if (gst_structure_get_int (structure, "rate", &samplerate)) {
GST_DEBUG_OBJECT (twolame,
"Setting sample rate to %d as fixed in src caps", samplerate);
twolame_set_out_samplerate (twolame->glopts, samplerate);
} else {
GST_DEBUG_OBJECT (twolame, "Letting twolame choose sample rate");
twolame_set_out_samplerate (twolame->glopts, 0);
}
gst_caps_unref (allowed_caps);
allowed_caps = NULL;
} else {
GST_DEBUG_OBJECT (twolame,
"No peer yet, letting twolame choose sample rate");
twolame_set_out_samplerate (twolame->glopts, 0);
}
/* force mono encoding if we only have one channel */
if (twolame->num_channels == 1)
twolame->mode = 3;
/* Fix bitrates and MPEG version */
CHECK_ERROR (twolame_set_num_channels (twolame->glopts,
twolame->num_channels));
CHECK_ERROR (twolame_set_mode (twolame->glopts, twolame->mode));
CHECK_ERROR (twolame_set_psymodel (twolame->glopts, twolame->psymodel));
CHECK_AND_FIXUP_BITRATE (twolame, "bitrate", twolame->bitrate);
CHECK_ERROR (twolame_set_bitrate (twolame->glopts, twolame->bitrate));
CHECK_ERROR (twolame_set_padding (twolame->glopts, twolame->padding));
CHECK_ERROR (twolame_set_energy_levels (twolame->glopts,
twolame->energy_level_extension));
CHECK_ERROR (twolame_set_emphasis (twolame->glopts, twolame->emphasis));
CHECK_ERROR (twolame_set_error_protection (twolame->glopts,
twolame->error_protection));
CHECK_ERROR (twolame_set_copyright (twolame->glopts, twolame->copyright));
CHECK_ERROR (twolame_set_original (twolame->glopts, twolame->original));
CHECK_ERROR (twolame_set_VBR (twolame->glopts, twolame->vbr));
CHECK_ERROR (twolame_set_VBR_level (twolame->glopts, twolame->vbr_level));
CHECK_ERROR (twolame_set_ATH_level (twolame->glopts, twolame->ath_level));
CHECK_AND_FIXUP_BITRATE (twolame, "vbr-max-bitrate",
twolame->vbr_max_bitrate);
CHECK_ERROR (twolame_set_VBR_max_bitrate_kbps (twolame->glopts,
twolame->vbr_max_bitrate));
CHECK_ERROR (twolame_set_quick_mode (twolame->glopts, twolame->quick_mode));
CHECK_ERROR (twolame_set_quick_count (twolame->glopts,
twolame->quick_mode_count));
/* initialize the twolame encoder */
if ((retval = twolame_init_params (twolame->glopts)) >= 0) {
twolame->setup = TRUE;
/* FIXME: it would be nice to print out the mode here */
GST_INFO ("twolame encoder setup (%d kbit/s, %d Hz, %d channels)",
twolame->bitrate, twolame->samplerate, twolame->num_channels);
} else {
GST_ERROR_OBJECT (twolame, "twolame_init_params returned %d", retval);
}
GST_DEBUG_OBJECT (twolame, "done with setup");
return twolame->setup;
#undef CHECK_ERROR
}
/*
parse_args()
Parse the command line arguments
*/
void
parse_args(int argc, char **argv, twolame_options * encopts )
{
int ch=0;
// process args
struct option longopts[] = {
// Input
{ "raw-input", no_argument, NULL, 'r' },
{ "byte-swap", no_argument, NULL, 'x' },
{ "samplerate", required_argument, NULL, 's' },
{ "channels", required_argument, NULL, 'N' },
{ "swap-channels", no_argument, NULL, 'g' },
{ "scale", required_argument, NULL, 1000 },
{ "scale-l", required_argument, NULL, 1001 },
{ "scale-r", required_argument, NULL, 1002 },
// Output
{ "mode", required_argument, NULL, 'm' },
{ "downmix", no_argument, NULL, 'a' },
{ "bitrate", required_argument, NULL, 'b' },
{ "psyc-mode", required_argument, NULL, 'P' },
{ "vbr", no_argument, NULL, 'v' },
{ "vbr-level", required_argument, NULL, 'V' },
{ "max-bitrate", required_argument, NULL, 'B' },
{ "ath", required_argument, NULL, 'l' },
{ "quick", required_argument, NULL, 'q' },
{ "single-frame", no_argument, NULL, 'S' },
// Misc
{ "copyright", no_argument, NULL, 'c' },
{ "non-original", no_argument, NULL, 'o' },
{ "original", no_argument, NULL, 1003 },
{ "protect", no_argument, NULL, 'p' },
{ "padding", no_argument, NULL, 'd' },
{ "reserve-bits", required_argument, NULL, 'R' },
{ "deemphasis", required_argument, NULL, 'e' },
{ "energy", no_argument, NULL, 'E' },
// Verbosity
{ "talkativity", required_argument, NULL, 't' },
{ "quiet", no_argument, NULL, 1004 },
{ "brief", no_argument, NULL, 1005 },
{ "verbose", no_argument, NULL, 1006 },
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
// Create a short options structure from the long one
char* shortopts = build_shortopt_string( longopts );
//printf("shortopts: %s\n", shortopts);
while( (ch = getopt_long( argc, argv, shortopts, longopts, NULL )) != -1)
{
switch(ch) {
// Input
case 'r':
sfinfo.format = SF_FORMAT_RAW | SF_FORMAT_PCM_16;
break;
case 'x':
byteswap = TRUE;
break;
case 's':
twolame_set_out_samplerate(encopts, atoi(optarg));
sfinfo.samplerate = atoi(optarg);
break;
case 'N':
sfinfo.channels = atoi(optarg);
break;
case 'g':
channelswap = TRUE;
break;
case 1000: // --scale
twolame_set_scale( encopts, atof(optarg) );
break;
case 1001: // --scale-l
twolame_set_scale_left( encopts, atof(optarg) );
break;
case 1002: // --scale-r
twolame_set_scale_right( encopts, atof(optarg) );
break;
// Output
case 'm':
if (*optarg == 's') {
twolame_set_mode(encopts, TWOLAME_STEREO);
} else if (*optarg == 'd') {
twolame_set_mode(encopts, TWOLAME_DUAL_CHANNEL);
} else if (*optarg == 'j') {
twolame_set_mode(encopts, TWOLAME_JOINT_STEREO);
} else if (*optarg == 'm') {
twolame_set_mode(encopts, TWOLAME_MONO);
} else if (*optarg == 'a') {
twolame_set_mode(encopts, TWOLAME_AUTO_MODE);
} else {
fprintf(stderr, "Error: mode must be a/s/d/j/m not '%s'\n\n", optarg);
usage_long();
}
break;
case 'a': // downmix
twolame_set_mode(encopts, TWOLAME_MONO);
break;
case 'b':
twolame_set_bitrate(encopts, atoi(optarg));
break;
case 'P':
twolame_set_psymodel(encopts, atoi(optarg));
break;
case 'v':
twolame_set_VBR(encopts, TRUE);
break;
case 'V':
twolame_set_VBR(encopts, TRUE);
twolame_set_VBR_level(encopts, atof(optarg));
break;
case 'B':
twolame_set_VBR_max_bitrate_kbps(encopts, atoi(optarg));
break;
case 'l':
twolame_set_ATH_level(encopts, atof(optarg));
break;
case 'q':
twolame_set_quick_mode(encopts, TRUE);
twolame_set_quick_count(encopts, atoi(optarg));
break;
case 'S':
single_frame_mode = TRUE;
break;
// Miscellaneous
case 'c':
twolame_set_copyright(encopts, TRUE);
break;
case 'o': // --non-original
twolame_set_original(encopts, FALSE);
break;
case 1003: // --original
twolame_set_original(encopts, TRUE);
break;
case 'p':
twolame_set_error_protection(encopts, TRUE);
break;
case 'd':
twolame_set_padding(encopts, TWOLAME_PAD_ALL);
break;
case 'R':
twolame_set_num_ancillary_bits(encopts, atoi(optarg));
break;
case 'e':
if (*optarg == 'n')
twolame_set_emphasis(encopts, TWOLAME_EMPHASIS_N);
else if (*optarg == '5')
twolame_set_emphasis(encopts, TWOLAME_EMPHASIS_5);
else if (*optarg == 'c')
twolame_set_emphasis(encopts, TWOLAME_EMPHASIS_C);
else {
fprintf(stderr, "Error: emphasis must be n/5/c not '%s'\n\n", optarg);
usage_long();
}
break;
case 'E':
twolame_set_energy_levels(encopts, TRUE);
break;
// Verbosity
case 't':
twolame_set_verbosity(encopts, atoi(optarg));
break;
case 1004: // --quiet
twolame_set_verbosity(encopts, 0);
break;
case 1005: // --brief
twolame_set_verbosity(encopts, 1);
break;
case 1006: // --verbose
twolame_set_verbosity(encopts, 4);
break;
case 'h':
usage_long();
break;
default:
usage_short();
break;
}
}
// Look for the input and output file names
argc -= optind;
argv += optind;
while( argc ) {
if (inputfilename[0] == '\0')
strncpy(inputfilename, *argv, MAX_NAME_SIZE);
else if (outputfilename[0] == '\0')
strncpy(outputfilename, *argv, MAX_NAME_SIZE);
else {
fprintf(stderr, "excess argument: %s\n", *argv);
usage_short();
}
argv++;
argc--;
}
// Check that we now have input and output file names ok
if ( inputfilename[0] == '\0') {
fprintf(stderr, "Missing input filename.\n");
usage_short();
}
if ( outputfilename[0] == '\0' && strcmp(inputfilename, "-")!=0 ) {
// Create output filename from the inputfilename
// and change the suffix
new_extension( inputfilename, OUTPUT_SUFFIX, outputfilename );
}
if ( outputfilename[0] == '\0') {
fprintf(stderr, "Missing output filename.\n");
usage_short();
}
}
static int OpenEncoder( vlc_object_t *p_this )
{
encoder_t *p_enc = (encoder_t *)p_this;
encoder_sys_t *p_sys;
int i_frequency;
if( p_enc->fmt_out.i_codec != VLC_CODEC_MP2 &&
p_enc->fmt_out.i_codec != VLC_CODEC_MPGA &&
p_enc->fmt_out.i_codec != VLC_FOURCC( 'm', 'p', '2', 'a' ) &&
!p_enc->obj.force )
{
return VLC_EGENERIC;
}
if( p_enc->fmt_in.audio.i_channels > 2 )
{
msg_Err( p_enc, "doesn't support > 2 channels" );
return VLC_EGENERIC;
}
for ( i_frequency = 0; i_frequency < 6; i_frequency++ )
{
if ( p_enc->fmt_out.audio.i_rate == mpa_freq_tab[i_frequency] )
break;
}
if ( i_frequency == 6 )
{
msg_Err( p_enc, "MPEG audio doesn't support frequency=%d",
p_enc->fmt_out.audio.i_rate );
return VLC_EGENERIC;
}
/* Allocate the memory needed to store the decoder's structure */
if( ( p_sys = (encoder_sys_t *)malloc(sizeof(encoder_sys_t)) ) == NULL )
return VLC_ENOMEM;
p_enc->p_sys = p_sys;
p_enc->fmt_in.i_codec = VLC_CODEC_S16N;
p_enc->fmt_out.i_cat = AUDIO_ES;
p_enc->fmt_out.i_codec = VLC_CODEC_MPGA;
config_ChainParse( p_enc, ENC_CFG_PREFIX, ppsz_enc_options, p_enc->p_cfg );
p_sys->p_twolame = twolame_init();
/* Set options */
twolame_set_in_samplerate( p_sys->p_twolame, p_enc->fmt_out.audio.i_rate );
twolame_set_out_samplerate( p_sys->p_twolame, p_enc->fmt_out.audio.i_rate );
if( var_GetBool( p_enc, ENC_CFG_PREFIX "vbr" ) )
{
float f_quality = var_GetFloat( p_enc, ENC_CFG_PREFIX "quality" );
if ( f_quality > 50.f ) f_quality = 50.f;
if ( f_quality < 0.f ) f_quality = 0.f;
twolame_set_VBR( p_sys->p_twolame, 1 );
twolame_set_VBR_q( p_sys->p_twolame, f_quality );
}
else
{
int i;
for ( i = 1; i < 14; i++ )
{
if ( p_enc->fmt_out.i_bitrate / 1000
<= mpa_bitrate_tab[i_frequency / 3][i] )
break;
}
if ( p_enc->fmt_out.i_bitrate / 1000
!= mpa_bitrate_tab[i_frequency / 3][i] )
{
msg_Warn( p_enc, "MPEG audio doesn't support bitrate=%d, using %d",
p_enc->fmt_out.i_bitrate,
mpa_bitrate_tab[i_frequency / 3][i] * 1000 );
p_enc->fmt_out.i_bitrate = mpa_bitrate_tab[i_frequency / 3][i]
* 1000;
}
twolame_set_bitrate( p_sys->p_twolame,
p_enc->fmt_out.i_bitrate / 1000 );
}
if ( p_enc->fmt_in.audio.i_channels == 1 )
{
twolame_set_num_channels( p_sys->p_twolame, 1 );
twolame_set_mode( p_sys->p_twolame, TWOLAME_MONO );
}
else
{
twolame_set_num_channels( p_sys->p_twolame, 2 );
switch( var_GetInteger( p_enc, ENC_CFG_PREFIX "mode" ) )
{
case 1:
twolame_set_mode( p_sys->p_twolame, TWOLAME_DUAL_CHANNEL );
break;
case 2:
twolame_set_mode( p_sys->p_twolame, TWOLAME_JOINT_STEREO );
break;
case 0:
default:
twolame_set_mode( p_sys->p_twolame, TWOLAME_STEREO );
break;
}
}
twolame_set_psymodel( p_sys->p_twolame,
var_GetInteger( p_enc, ENC_CFG_PREFIX "psy" ) );
if ( twolame_init_params( p_sys->p_twolame ) )
{
msg_Err( p_enc, "twolame initialization failed" );
return -VLC_EGENERIC;
}
p_enc->pf_encode_audio = Encode;
p_sys->i_nb_samples = 0;
return VLC_SUCCESS;
}
bool MpegL2Codec::startCodec()
{
#ifdef HAVE_TWOLAME
//
// Load Library
//
if((twolame_handle=dlopen("libtwolame.so.0",RTLD_LAZY))==NULL) {
Log(LOG_ERR,"unsupported audio format (library not found)");
return false;
}
*(void **)(&twolame_init)=dlsym(twolame_handle,"twolame_init");
*(void **)(&twolame_set_mode)=dlsym(twolame_handle,"twolame_set_mode");
*(void **)(&twolame_set_num_channels)=
dlsym(twolame_handle,"twolame_set_num_channels");
*(void **)(&twolame_set_in_samplerate)=
dlsym(twolame_handle,"twolame_set_in_samplerate");
*(void **)(&twolame_set_out_samplerate)=
dlsym(twolame_handle,"twolame_set_out_samplerate");
*(void **)(&twolame_set_bitrate)=
dlsym(twolame_handle,"twolame_set_bitrate");
*(void **)(&twolame_init_params)=
dlsym(twolame_handle,"twolame_init_params");
*(void **)(&twolame_close)=dlsym(twolame_handle,"twolame_close");
*(void **)(&twolame_encode_buffer_interleaved)=
dlsym(twolame_handle,"twolame_encode_buffer_interleaved");
*(void **)(&twolame_encode_buffer_float32_interleaved)=
dlsym(twolame_handle,"twolame_encode_buffer_float32_interleaved");
*(void **)(&twolame_encode_flush)=
dlsym(twolame_handle,"twolame_encode_flush");
*(void **)(&twolame_set_energy_levels)=
dlsym(twolame_handle,"twolame_set_energy_levels");
*(void **)(&twolame_set_VBR)=dlsym(twolame_handle,"twolame_set_VBR");
*(void **)(&twolame_set_VBR_level)=
dlsym(twolame_handle,"twolame_set_VBR_level");
//
// Initialize Encoder Instance
//
TWOLAME_MPEG_mode mpeg_mode=TWOLAME_STEREO;
switch(channels()) {
case 1:
mpeg_mode=TWOLAME_MONO;
break;
case 2:
mpeg_mode=TWOLAME_STEREO;
break;
}
if((twolame_lameopts=twolame_init())==NULL) {
Log(LOG_ERR,"unable to initialize MP2 encoder");
return false;
}
twolame_set_mode(twolame_lameopts,mpeg_mode);
twolame_set_num_channels(twolame_lameopts,channels());
twolame_set_in_samplerate(twolame_lameopts,streamSamplerate());
twolame_set_out_samplerate(twolame_lameopts,streamSamplerate());
if(bitrate()==0) {
twolame_set_VBR(twolame_lameopts,TRUE);
twolame_set_VBR_level(twolame_lameopts,(int)(20.0*quality()-10.0));
}
else {
twolame_set_bitrate(twolame_lameopts,bitrate());
}
twolame_set_energy_levels(twolame_lameopts,1);
if(twolame_init_params(twolame_lameopts)!=0) {
Log(LOG_ERR,"unable to start MP2 encoder");
return false;
}
return true;
#else
Log(LOG_ERR,"unsupported audio format (no build support)");
return false;
#endif // HAVE_TWOLAME
}
//________________________________________________
// Init lame encoder
// frequence : Impose frequency , 0 means reuse the incoming fq
// mode : ADM_STEREO etc...
// bitrate : Bitrate in kbps (96,192...)
// return 0 : init failed
// 1 : init succeeded
//_______________________________________________
uint8_t AUDMEncoder_Twolame::init(ADM_audioEncoderDescriptor *config)
{
int ret;
TWOLAME_MPEG_mode mmode;
uint32_t frequence;
TWOLAME_encoderParam *lameConf=(TWOLAME_encoderParam *)config->param;
ADM_assert(config->paramSize==sizeof(TWOLAME_encoderParam));
_twolameOptions = twolame_init();
if (_twolameOptions == NULL)
return 0;
if(_wavheader->channels>2)
{
printf("[TwoLame]Too many channels\n");
return 0;
}
_wavheader->byterate=(config->bitrate*1000)>>3;
_chunk = 1152*_wavheader->channels;
printf("[TwoLame]Incoming :fq : %lu, channel : %lu bitrate: %lu \n",
_wavheader->frequency,_wavheader->channels,config->bitrate);
twolame_set_in_samplerate(OPTIONS, _wavheader->frequency);
twolame_set_out_samplerate (OPTIONS, _wavheader->frequency);
twolame_set_num_channels(OPTIONS, _wavheader->channels);
if(_wavheader->channels==1) mmode=TWOLAME_MONO;
else
switch (lameConf->mode)
{
case ADM_STEREO:
mmode = TWOLAME_STEREO;
break;
case ADM_JSTEREO:
mmode = TWOLAME_JOINT_STEREO;
break;
case ADM_MONO:
mmode=TWOLAME_MONO;
break;
default:
printf("\n **** unknown mode, going stereo ***\n");
mmode = TWOLAME_STEREO;
break;
}
twolame_set_mode(OPTIONS,mmode);
twolame_set_error_protection(OPTIONS,TRUE);
//toolame_setPadding (options,TRUE);
twolame_set_bitrate (OPTIONS,config->bitrate);
twolame_set_verbosity(OPTIONS, 2);
if(twolame_init_params(OPTIONS))
{
printf("[TwoLame]Twolame init failed\n");
return 0;
}
printf("[TwoLame]Libtoolame successfully initialized\n");
return 1;
}
int main(int argc, char **argv)
{
twolame_options *encodeOptions;
char *inputfilename = argv[1];
char *outputfilename = argv[2];
FILE *outfile, *fpSrc = NULL;
short int *pcmaudio;
unsigned char *mp2buffer;
int num_samples = 0;
int mp2fill_size = 0;
int frames = 0;
wave_info_t *wave_info = NULL;
int nReadSize = 0;
if (argc != 3)
usage();
/* Allocate some space for the PCM audio data */
if ((pcmaudio = (short *) calloc(AUDIOBUFSIZE, sizeof(short))) == NULL) {
fprintf(stderr, "pcmaudio alloc failed\n");
exit(99);
}
/* Allocate some space for the encoded MP2 audio data */
if ((mp2buffer = (unsigned char *) calloc(MP2BUFSIZE, sizeof(unsigned char))) == NULL) {
fprintf(stderr, "mp2buffer alloc failed\n");
exit(99);
}
/* grab a set of default encode options */
encodeOptions = twolame_init();
printf("Using libtwolame version %s.\n", get_twolame_version());
/* Open the wave file */
if ((wave_info = wave_init(inputfilename)) == NULL) {
fprintf(stderr, "Not a recognised WAV file.\n");
exit(99);
}
// Use sound file to over-ride preferences for
// mono/stereo and sampling-frequency
twolame_set_num_channels(encodeOptions, wave_info->channels);
if (wave_info->channels == 1) {
twolame_set_mode(encodeOptions, TWOLAME_MONO);
} else {
twolame_set_mode(encodeOptions, TWOLAME_STEREO);
}
/* Set the input and output sample rate to the same */
twolame_set_in_samplerate(encodeOptions, wave_info->samplerate);
twolame_set_out_samplerate(encodeOptions, wave_info->samplerate);
/* Set the bitrate to 192 kbps */
twolame_set_bitrate(encodeOptions, 64);
/* initialise twolame with this set of options */
if (twolame_init_params(encodeOptions) != 0) {
fprintf(stderr, "Error: configuring libtwolame encoder failed.\n");
exit(99);
}
/* Open the output file for the encoded MP2 data */
if ((outfile = fopen(outputfilename, "wb")) == 0) {
fprintf(stderr, "error opening output file %s\n", outputfilename);
exit(99);
}
// Read num_samples of audio data *per channel* from the input file
//while ((num_samples = wave_get_samples(wave_info, pcmaudio, AUDIOBUFSIZE/2)) != 0) {
fpSrc = fopen( "a2002011001-e02.wav", "rb" );
while(1)
{
num_samples = fread( pcmaudio, sizeof( char ), AUDIOBUFSIZE/2, fpSrc );
// Encode the audio!2024*4
if( num_samples != AUDIOBUFSIZE/2 )
break;
num_samples /= 2;
mp2fill_size =
twolame_encode_buffer_interleaved(encodeOptions, pcmaudio, num_samples/2, mp2buffer,
MP2BUFSIZE);
// Write the MPEG bitstream to the file
fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outfile);
// Display the number of MPEG audio frames we have encoded
frames += (num_samples / TWOLAME_SAMPLES_PER_FRAME);
printf("[%04i]\r", frames);
fflush(stdout);
}
/* flush any remaining audio. (don't send any new audio data) There should only ever be a max
of 1 frame on a flush. There may be zero frames if the audio data was an exact multiple of
1152 */
mp2fill_size = twolame_encode_flush(encodeOptions, mp2buffer, MP2BUFSIZE);
fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outfile);
twolame_close(&encodeOptions);
free(pcmaudio);
printf("\nFinished nicely.\n");
return (0);
}
int mpae_init_twolame(audio_encoder_t *encoder)
{
int mode;
mpae_twolame_ctx *ctx = NULL;
if(encoder->params.channels == 1)
{
mp_msg(MSGT_MENCODER, MSGL_INFO, "ae_twolame, 1 audio channel, forcing mono mode\n");
mode = TWOLAME_MONO;
}
else if(encoder->params.channels == 2)
{
if(! strcasecmp(param_mode, "dual"))
mode = TWOLAME_DUAL_CHANNEL;
else if(! strcasecmp(param_mode, "jstereo"))
mode = TWOLAME_JOINT_STEREO;
else if(! strcasecmp(param_mode, "stereo"))
mode = TWOLAME_STEREO;
else
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, unknown mode %s, exiting\n", param_mode);
}
}
else
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, Twolame can't encode > 2 channels, exiting\n");
ctx = (mpae_twolame_ctx *) calloc(1, sizeof(mpae_twolame_ctx));
if(ctx == NULL)
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't alloc a %d bytes context, exiting\n", sizeof(mpae_twolame_ctx));
return 0;
}
ctx->twolame_ctx = twolame_init();
if(ctx->twolame_ctx == NULL)
{
mp_msg(MSGT_MENCODER, MSGL_ERR, "ae_twolame, couldn't initial parameters from libtwolame, exiting\n");
free(ctx);
return 0;
}
ctx->vbr = 0;
if(twolame_set_num_channels(ctx->twolame_ctx, encoder->params.channels) != 0)
return 0;
if(twolame_set_mode(ctx->twolame_ctx, mode) != 0)
return 0;
if(twolame_set_in_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
return 0;
if(twolame_set_out_samplerate(ctx->twolame_ctx, encoder->params.sample_rate) != 0)
return 0;
if(encoder->params.sample_rate < 32000)
twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG2);
else
twolame_set_version(ctx->twolame_ctx, TWOLAME_MPEG1);
if(twolame_set_psymodel(ctx->twolame_ctx, param_psy) != 0)
return 0;
if(twolame_set_bitrate(ctx->twolame_ctx, param_bitrate) != 0)
return 0;
if(param_errprot)
if(twolame_set_error_protection(ctx->twolame_ctx, TRUE) != 0)
return 0;
if(param_vbr != 0)
{
if(twolame_set_VBR(ctx->twolame_ctx, TRUE) != 0)
return 0;
if(twolame_set_VBR_q(ctx->twolame_ctx, param_vbr) != 0)
return 0;
if(twolame_set_padding(ctx->twolame_ctx, FALSE) != 0)
return 0;
if(param_maxvbr)
{
if(twolame_set_VBR_max_bitrate_kbps(ctx->twolame_ctx, param_maxvbr) != 0)
return 0;
}
ctx->vbr = 1;
}
if(twolame_set_verbosity(ctx->twolame_ctx, param_debug) != 0)
return 0;
if(twolame_init_params(ctx->twolame_ctx) != 0)
return 0;
encoder->params.bitrate = param_bitrate * 1000;
encoder->params.samples_per_frame = 1152;
encoder->priv = ctx;
encoder->decode_buffer_size = 1152 * 2 * encoder->params.channels;
encoder->bind = bind_twolame;
encoder->get_frame_size = get_frame_size;
encoder->encode = encode_twolame;
encoder->close = close_twolame;
return 1;
}
