static bool
twolame_encoder_open(struct encoder *_encoder, struct audio_format *audio_format,
GError **error)
{
struct twolame_encoder *encoder = (struct twolame_encoder *)_encoder;
audio_format->format = SAMPLE_FORMAT_S16;
audio_format->channels = 2;
encoder->audio_format = *audio_format;
encoder->options = twolame_init();
if (encoder->options == NULL) {
g_set_error(error, twolame_encoder_quark(), 0,
"twolame_init() failed");
return false;
}
if (!twolame_encoder_setup(encoder, error)) {
twolame_close(&encoder->options);
return false;
}
encoder->buffer_length = 0;
encoder->flush = false;
return true;
}
// Initialise the codec
MastCodec_MPA::MastCodec_MPA( MastMimeType *type)
: MastCodec(type)
{
// Set default values
this->samplerate = MPA_DEFAULT_SAMPLERATE;
this->channels = MPA_DEFAULT_CHANNELS;
// Initialise twolame
this->twolame = twolame_init();
if (this->twolame==NULL) {
MAST_FATAL( "Failed to initialise TwoLame" );
}
// Configure twolame
if (twolame_set_num_channels( this->twolame, this->channels )) {
MAST_WARNING( "Failed to set number of input channels" );
}
if (twolame_set_in_samplerate( this->twolame, this->samplerate )) {
MAST_WARNING( "Failed to set number of input samplerate" );
}
// Apply MIME type parameters to the codec
this->apply_mime_type_params( type );
// Get TwoLAME ready to go...
twolame_init_params( this->twolame );
}
/**
\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;
}
static gboolean
gst_two_lame_get_default_settings (void)
{
twolame_options *glopts = NULL;
glopts = twolame_init ();
if (glopts == NULL) {
GST_ERROR ("Couldn't initialize TwoLAME");
return FALSE;
}
twolame_set_num_channels (glopts, 2);
twolame_set_in_samplerate (glopts, 44100);
if (twolame_init_params (glopts) != 0) {
GST_ERROR ("Couldn't set default parameters");
return FALSE;
}
gst_two_lame_default_settings.mode = TWOLAME_JOINT_STEREO; /* twolame_get_mode (glopts); */
gst_two_lame_default_settings.psymodel = twolame_get_psymodel (glopts);
gst_two_lame_default_settings.bitrate = twolame_get_bitrate (glopts);
gst_two_lame_default_settings.padding = twolame_get_padding (glopts);
gst_two_lame_default_settings.energy_level_extension =
twolame_get_energy_levels (glopts);
gst_two_lame_default_settings.emphasis = twolame_get_emphasis (glopts);
gst_two_lame_default_settings.error_protection =
twolame_get_error_protection (glopts);
gst_two_lame_default_settings.copyright = twolame_get_copyright (glopts);
gst_two_lame_default_settings.original = twolame_get_original (glopts);
gst_two_lame_default_settings.vbr = twolame_get_VBR (glopts);
gst_two_lame_default_settings.vbr_level = twolame_get_VBR_level (glopts);
gst_two_lame_default_settings.ath_level = twolame_get_ATH_level (glopts);
gst_two_lame_default_settings.vbr_max_bitrate =
twolame_get_VBR_max_bitrate_kbps (glopts);
gst_two_lame_default_settings.quick_mode = twolame_get_quick_mode (glopts);
gst_two_lame_default_settings.quick_mode_count =
twolame_get_quick_count (glopts);
twolame_close (&glopts);
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
}
int
main(int argc, char **argv)
{
twolame_options *encopts = NULL;
SNDFILE *inputfile = NULL;
FILE *outputfile = NULL;
short int *pcmaudio = NULL;
int samples_read = 0;
unsigned int frame_count = 0;
unsigned char *mp2buffer = NULL;
int mp2fill_size = 0;
int audioReadSize = 0;
// Allocate memory for the PCM audio data
if ((pcmaudio = (short int *) calloc(AUDIOBUFSIZE, sizeof(short int))) == NULL) {
fprintf(stderr, "Error: pcmaudio memory allocation failed\n");
exit(ERR_MEM_ALLOC);
}
// Allocate memory for the encoded MP2 audio data
if ((mp2buffer = (unsigned char *) calloc(MP2BUFSIZE, sizeof(unsigned char))) == NULL) {
fprintf(stderr, "Error: mp2buffer memory allocation failed\n");
exit(ERR_MEM_ALLOC);
}
// Initialise Encoder Options Structure
encopts = twolame_init();
if (encopts == NULL) {
fprintf(stderr, "Error: initializing libtwolame encoder failed.\n");
exit(ERR_MEM_ALLOC);
}
// Get options and parameters from the command line
parse_args(argc, argv, encopts);
// Open the input file
inputfile = open_input_file( inputfilename );
twolame_set_num_channels( encopts, sfinfo.channels );
twolame_set_in_samplerate( encopts, sfinfo.samplerate );
// Open the output file
outputfile = open_output_file( outputfilename );
// display file settings
print_file_config( inputfile, twolame_get_verbosity(encopts) );
// initialise twolame with this set of options
if (twolame_init_params( encopts ) != 0) {
fprintf(stderr, "Error: configuring libtwolame encoder failed.\n");
exit(ERR_INVALID_PARAM);
}
// display encoder settings
twolame_print_config( encopts );
// Only encode a single frame of mpeg audio ?
if (single_frame_mode) audioReadSize = 1152;
else audioReadSize = AUDIOBUFSIZE;
// Now do the reading/encoding/writing
while ((samples_read = sf_read_short( inputfile, pcmaudio, audioReadSize )) > 0) {
int bytes_out = 0;
// Force byte swapping if requested
if (byteswap) {
int i;
for (i = 0; i<samples_read; i++) {
short tmp = pcmaudio[i];
char *src = (char*)&tmp;
char *dst = (char*)&pcmaudio[i];
dst[0] = src[1];
dst[1] = src[0];
}
}
// Calculate the number of samples we have (per channel)
samples_read /= sfinfo.channels;
// Do swapping of left and right channels if requested
if (channelswap && sfinfo.channels == 2) {
int i;
for(i=0; i<samples_read; i++) {
short tmp = pcmaudio[(2*i)];
pcmaudio[(2*i)] = pcmaudio[(2*i)+1];
pcmaudio[(2*i)+1] = tmp;
}
}
// Encode the audio to MP2
mp2fill_size = twolame_encode_buffer_interleaved( encopts, pcmaudio, samples_read, mp2buffer, MP2BUFSIZE);
// Stop if we don't have any bytes (probably don't have enough audio for a full frame of mpeg audio)
if (mp2fill_size==0) break;
if (mp2fill_size<0) {
fprintf(stderr,"error while encoding audio: %d\n", mp2fill_size);
exit(ERR_WRITING_OUTPUT);
}
// Write the encoded audio out
bytes_out = fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outputfile);
if (bytes_out<=0) {
perror("error while writing to output file");
exit(ERR_WRITING_OUTPUT);
}
// Only single frame ?
if (single_frame_mode) break;
// Display Progress
frame_count += (samples_read / 1152);
if (twolame_get_verbosity(encopts)>0) {
fprintf(stderr, "[%04i", frame_count);
//fprintf(stderr, "/%04i", (int)(sfinfo.frames / sfinfo.channels / 1152));
fprintf(stderr, "]\r");
fflush(stderr);
}
}
//
// 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( encopts, mp2buffer, MP2BUFSIZE);
if (mp2fill_size>0) {
int bytes_out = fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outputfile);
if (bytes_out<=0) {
perror("error while writing to output file");
exit(ERR_WRITING_OUTPUT);
}
}
if (twolame_get_verbosity(encopts)>1) {
fprintf(stderr, "\nEncoding Finished.\n");
}
// Close input and output files
sf_close( inputfile );
fclose( outputfile );
// Close the libtwolame encoder
twolame_close(&encopts);
// Free up memory
free(pcmaudio);
free(mp2buffer);
return (ERR_NO_ERROR);
}
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;
}
int main(int argc, char **argv)
{
twolame_options *encopts = NULL;
audioin_t *inputfile = NULL;
FILE *outputfile = NULL;
short int *pcmaudio = NULL;
unsigned int frame_count = 0;
unsigned int total_frames = 0;
unsigned int frame_len = 0;
unsigned int total_bytes = 0;
unsigned char *mp2buffer = NULL;
int samples_read = 0;
int mp2fill_size = 0;
int audioReadSize = 0;
// Allocate memory for the PCM audio data
if ((pcmaudio = (short int *) calloc(AUDIO_BUF_SIZE, sizeof(short int))) == NULL) {
fprintf(stderr, "Error: pcmaudio memory allocation failed\n");
exit(ERR_MEM_ALLOC);
}
// Allocate memory for the encoded MP2 audio data
if ((mp2buffer = (unsigned char *) calloc(MP2_BUF_SIZE, sizeof(unsigned char))) == NULL) {
fprintf(stderr, "Error: mp2buffer memory allocation failed\n");
exit(ERR_MEM_ALLOC);
}
// Initialise Encoder Options Structure
encopts = twolame_init();
if (encopts == NULL) {
fprintf(stderr, "Error: initializing libtwolame encoder failed.\n");
exit(ERR_MEM_ALLOC);
}
// Get options and parameters from the command line
parse_args(argc, argv, encopts);
// Display the filenames
print_filenames(twolame_get_verbosity(encopts));
// Open the input file
if (use_raw) {
// use raw input handler
inputfile = open_audioin_raw(inputfilename, &sfinfo, sample_size);
} else {
// use libsndfile
inputfile = open_audioin_sndfile(inputfilename, &sfinfo);
}
// Display input information
if (twolame_get_verbosity(encopts) > 1) {
inputfile->print_info(inputfile);
}
// Use information from input file to configure libtwolame
twolame_set_num_channels(encopts, sfinfo.channels);
twolame_set_in_samplerate(encopts, sfinfo.samplerate);
// Open the output file
outputfile = open_output_file(outputfilename);
// initialise twolame with this set of options
if (twolame_init_params(encopts) != 0) {
fprintf(stderr, "Error: configuring libtwolame encoder failed.\n");
exit(ERR_INVALID_PARAM);
}
// display encoder settings
twolame_print_config(encopts);
// Only encode a single frame of mpeg audio ?
if (single_frame_mode)
audioReadSize = TWOLAME_SAMPLES_PER_FRAME;
else
audioReadSize = AUDIO_BUF_SIZE;
// Calculate the size and number of frames we are going to encode
frame_len = twolame_get_framelength(encopts);
if (sfinfo.frames)
total_frames = sfinfo.frames / TWOLAME_SAMPLES_PER_FRAME;
// Now do the reading/encoding/writing
while ((samples_read = inputfile->read(inputfile, pcmaudio, audioReadSize)) > 0) {
int bytes_out = 0;
// Force byte swapping if requested
if (byteswap) {
int i;
for (i = 0; i < samples_read; i++) {
short tmp = pcmaudio[i];
char *src = (char *) &tmp;
char *dst = (char *) &pcmaudio[i];
dst[0] = src[1];
dst[1] = src[0];
}
}
// Calculate the number of samples we have (per channel)
samples_read /= sfinfo.channels;
// Do swapping of left and right channels if requested
if (channelswap && sfinfo.channels == 2) {
int i;
for (i = 0; i < samples_read; i++) {
short tmp = pcmaudio[(2 * i)];
pcmaudio[(2 * i)] = pcmaudio[(2 * i) + 1];
pcmaudio[(2 * i) + 1] = tmp;
}
}
// Encode the audio to MP2
mp2fill_size =
twolame_encode_buffer_interleaved(encopts, pcmaudio, samples_read, mp2buffer,
MP2_BUF_SIZE);
// Stop if we don't have any bytes (probably don't have enough audio for a full frame of
// mpeg audio)
if (mp2fill_size == 0)
break;
if (mp2fill_size < 0) {
fprintf(stderr, "error while encoding audio: %d\n", mp2fill_size);
exit(ERR_ENCODING);
}
// Check that a whole number of frame was written
// if (mp2fill_size % frame_len != 0) {
// fprintf(stderr,"error while encoding audio: non-whole number of frames written\n");
// exit(ERR_ENCODING);
// }
// Write the encoded audio out
bytes_out = fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outputfile);
if (bytes_out != mp2fill_size) {
perror("error while writing to output file");
exit(ERR_WRITING_OUTPUT);
}
total_bytes += bytes_out;
// Only single frame ?
if (single_frame_mode)
break;
// Display Progress
frame_count += (mp2fill_size / frame_len);
if (twolame_get_verbosity(encopts) > 0) {
fprintf(stderr, "\rEncoding frame: %i", frame_count);
if (total_frames) {
fprintf(stderr, "/%i (%i%%)", total_frames, (frame_count * 100) / total_frames);
}
fflush(stderr);
}
}
// Was there an error reading the audio?
if (inputfile->error_str(inputfile)) {
fprintf(stderr, "Error reading from input file: %s\n", inputfile->error_str(inputfile));
}
//
// 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(encopts, mp2buffer, MP2_BUF_SIZE);
if (mp2fill_size > 0) {
int bytes_out = fwrite(mp2buffer, sizeof(unsigned char), mp2fill_size, outputfile);
frame_count++;
if (bytes_out <= 0) {
perror("error while writing to output file");
exit(ERR_WRITING_OUTPUT);
}
total_bytes += bytes_out;
}
if (twolame_get_verbosity(encopts) > 1) {
char *filesize = format_filesize_string(total_bytes);
fprintf(stderr, "\nEncoding Finished.\n");
fprintf(stderr, "Total bytes written: %s.\n", filesize);
free(filesize);
}
// Close input and output streams
inputfile->close(inputfile);
fclose(outputfile);
// Close the libtwolame encoder
twolame_close(&encopts);
// Free up memory
free(pcmaudio);
free(mp2buffer);
return (ERR_NO_ERROR);
}
