int enclameInit( hb_work_object_t * w, hb_job_t * job )
{
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
hb_audio_t * audio = w->audio;
w->private_data = pv;
pv->job = job;
hb_log( "enclame: opening libmp3lame" );
pv->lame = lame_init();
// use ABR
lame_set_scale( pv->lame, 32768.0 );
if( audio->config.out.compression_level >= 0 )
{
lame_set_quality( pv->lame, audio->config.out.compression_level );
}
if( audio->config.out.bitrate > 0 )
{
lame_set_VBR( pv->lame, vbr_abr );
lame_set_VBR_mean_bitrate_kbps( pv->lame, audio->config.out.bitrate );
}
else if( audio->config.out.quality >= 0 )
{
lame_set_brate( pv->lame, 0 );
lame_set_VBR( pv->lame, vbr_default );
lame_set_VBR_quality( pv->lame, audio->config.out.quality );
}
lame_set_in_samplerate( pv->lame, audio->config.out.samplerate );
lame_set_out_samplerate( pv->lame, audio->config.out.samplerate );
pv->out_discrete_channels = hb_mixdown_get_discrete_channel_count( audio->config.out.mixdown );
// Lame's default encoding mode is JOINT_STEREO. This subtracts signal
// that is "common" to left and right (within some threshold) and encodes
// it separately. This improves quality at low bitrates, but hurts
// imaging (channel separation) at higher bitrates. So if the bitrate
// is suffeciently high, use regular STEREO mode.
if ( pv->out_discrete_channels == 1 )
{
lame_set_mode( pv->lame, MONO );
lame_set_num_channels( pv->lame, 1 );
}
else if ( audio->config.out.bitrate >= 128 )
{
lame_set_mode( pv->lame, STEREO );
}
lame_init_params( pv->lame );
pv->input_samples = 1152 * pv->out_discrete_channels;
pv->output_bytes = LAME_MAXMP3BUFFER;
pv->buf = malloc( pv->input_samples * sizeof( float ) );
audio->config.out.samples_per_frame = 1152;
pv->list = hb_list_init();
pv->pts = -1;
return 0;
}
bool LameAudioWriter::open_private()
{
m_fid = fopen(m_fileName.toUtf8().data(), "w+");
if (!m_fid) {
return false;
}
m_lameInfo->flags = lame_init();
if (m_lameInfo->flags == 0) {
PERROR("lame_init failed.");
return false;
}
if (m_channels == 1) {
lame_set_mode(m_lameInfo->flags, MONO);
}
lame_set_num_channels(m_lameInfo->flags, m_channels);
lame_set_in_samplerate(m_lameInfo->flags, m_rate);
lame_set_out_samplerate(m_lameInfo->flags, m_rate);
if(m_method == 0) {
// Constant Bitrate
lame_set_VBR(m_lameInfo->flags, vbr_off);
lame_set_brate(m_lameInfo->flags, m_maxBitrate);
}
else if (m_method == 1) {
// Average Bitrate
lame_set_VBR(m_lameInfo->flags, vbr_abr);
lame_set_VBR_mean_bitrate_kbps(m_lameInfo->flags, m_maxBitrate);
}
else if (m_method == 2) {
// Variable Bitrate (old)
lame_set_VBR(m_lameInfo->flags, vbr_default);
lame_set_VBR_min_bitrate_kbps(m_lameInfo->flags, m_minBitrate);
lame_set_VBR_max_bitrate_kbps(m_lameInfo->flags, m_maxBitrate);
}
else if (m_method == 3) {
// Variable Bitrate (new)
lame_set_VBR(m_lameInfo->flags, vbr_default);
lame_set_VBR_min_bitrate_kbps(m_lameInfo->flags, m_minBitrate);
lame_set_VBR_max_bitrate_kbps(m_lameInfo->flags, m_maxBitrate);
}
lame_set_quality(m_lameInfo->flags, m_quality);
//
// file options
//
lame_set_copyright(m_lameInfo->flags, false);
lame_set_original(m_lameInfo->flags, true);
lame_set_strict_ISO(m_lameInfo->flags, false);
lame_set_error_protection(m_lameInfo->flags, false);
return (lame_init_params(m_lameInfo->flags ) != -1);
}
/*------------------------------------------------------------------------------
* Open an encoding session
*----------------------------------------------------------------------------*/
bool
LameLibEncoder :: open ( void )
throw ( Exception )
{
if ( isOpen() ) {
close();
}
lameGlobalFlags = lame_init();
// ugly lame returns -1 in a pointer on allocation errors
if ( !lameGlobalFlags || ((int)lameGlobalFlags) == -1 ) {
throw Exception( __FILE__, __LINE__,
"lame lib init error",
(int) lameGlobalFlags);
}
if ( 0 > lame_set_num_channels( lameGlobalFlags, getInChannel()) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting channels error",
getInChannel() );
}
if ( 0 > lame_set_mode( lameGlobalFlags,
getOutChannel() == 1 ? MONO : JOINT_STEREO) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting mode error",
JOINT_STEREO );
}
reportEvent( 5, "set lame mode", lame_get_mode( lameGlobalFlags));
reportEvent( 5,
"set lame channels",
lame_get_num_channels( lameGlobalFlags));
if ( 0 > lame_set_in_samplerate( lameGlobalFlags, getInSampleRate()) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting input sample rate error",
getInSampleRate() );
}
reportEvent( 5,
"set lame in sample rate",
lame_get_in_samplerate( lameGlobalFlags));
if ( 0 > lame_set_out_samplerate( lameGlobalFlags, getOutSampleRate()) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting output sample rate error",
getOutSampleRate() );
}
reportEvent( 5,
"set lame out sample rate",
lame_get_out_samplerate( lameGlobalFlags));
switch ( getOutBitrateMode() ) {
case cbr: {
if ( 0 > lame_set_brate( lameGlobalFlags, getOutBitrate()) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting output bit rate error",
getOutBitrate() );
}
reportEvent( 5,
"set lame bit rate",
lame_get_brate( lameGlobalFlags));
double d = (1.0 - getOutQuality()) * 10.0;
int q = int (d + 0.499999);
if ( 0 > lame_set_quality( lameGlobalFlags, q) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting quality error", q);
}
reportEvent( 5,
"set lame quality",
lame_get_quality( lameGlobalFlags));
} break;
case abr:
if ( 0 > lame_set_VBR( lameGlobalFlags,vbr_abr)) {
throw Exception( __FILE__, __LINE__,
"lame lib setting abr error", vbr_abr);
}
reportEvent( 5,
"set lame abr bitrate",
lame_get_VBR( lameGlobalFlags));
if ( 0 > lame_set_VBR_mean_bitrate_kbps( lameGlobalFlags,
getOutBitrate())) {
throw Exception( __FILE__, __LINE__,
"lame lib setting abr mean bitrate error",
getOutBitrate());
}
reportEvent( 5,
"set lame abr mean bitrate",
lame_get_VBR_mean_bitrate_kbps( lameGlobalFlags));
break;
case vbr: {
if ( 0 > lame_set_VBR( lameGlobalFlags, vbr_mtrh)) {
throw Exception( __FILE__, __LINE__,
"lame lib setting vbr error", vbr_mtrh );
}
reportEvent( 5,
"set lame vbr bitrate",
lame_get_VBR( lameGlobalFlags));
double d = (1.0 - getOutQuality()) * 10.0;
int q = int (d + 0.499999);
if ( 0 > lame_set_VBR_q( lameGlobalFlags, q) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting vbr quality error", q);
}
reportEvent( 5,
"set lame vbr quality",
lame_get_VBR_q( lameGlobalFlags));
} break;
}
if ( 0 > lame_set_lowpassfreq( lameGlobalFlags, lowpass) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting lowpass frequency error",
lowpass );
}
reportEvent( 5,
"set lame lowpass frequency",
lame_get_lowpassfreq( lameGlobalFlags));
if ( 0 > lame_set_highpassfreq( lameGlobalFlags, highpass) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting highpass frequency error",
lowpass );
}
reportEvent( 5,
"set lame highpass frequency",
lame_get_highpassfreq( lameGlobalFlags));
// not configurable lame settings
if ( 0 > lame_set_exp_nspsytune( lameGlobalFlags, 1) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting psycho acoustic model error");
}
reportEvent( 5,
"set lame psycho acoustic model",
lame_get_exp_nspsytune( lameGlobalFlags));
if ( 0 > lame_set_error_protection( lameGlobalFlags, 1) ) {
throw Exception( __FILE__, __LINE__,
"lame lib setting error protection error",
1 );
}
reportEvent( 5,
"set lame error protection",
lame_get_error_protection( lameGlobalFlags));
// let lame init its own params based on our settings
if ( 0 > lame_init_params( lameGlobalFlags) ) {
throw Exception( __FILE__, __LINE__,
"lame lib initializing params error" );
}
lame_print_config( lameGlobalFlags);
// open the underlying sink
if ( !sink->open() ) {
throw Exception( __FILE__, __LINE__,
"lame lib opening underlying sink error");
}
return true;
}
bool ACMStream::open(const AEncodeProperties & the_Properties)
{
bool bResult = false;
// Init the MP3 Stream
// Init the global flags structure
gfp = lame_init();
// Set input sample frequency
lame_set_in_samplerate( gfp, my_SamplesPerSec );
// Set output sample frequency
lame_set_out_samplerate( gfp, my_OutBytesPerSec );
lame_set_num_channels( gfp, my_Channels );
if (my_Channels == 1)
lame_set_mode( gfp, MONO );
else
lame_set_mode( gfp, (MPEG_mode_e)the_Properties.GetChannelModeValue()) ; /// \todo Get the mode from the default configuration
// lame_set_VBR( gfp, vbr_off ); /// \note VBR not supported for the moment
lame_set_VBR( gfp, my_VBRMode ); /// \note VBR not supported for the moment
if (my_VBRMode == vbr_abr)
{
lame_set_VBR_q( gfp, 1 );
lame_set_VBR_mean_bitrate_kbps( gfp, (my_AvgBytesPerSec * 8 + 500) / 1000 );
if (24000 > lame_get_in_samplerate( gfp ))
{
// For MPEG-II
lame_set_VBR_min_bitrate_kbps( gfp, 8);
lame_set_VBR_max_bitrate_kbps( gfp, 160);
}
else
{
// For MPEG-I
lame_set_VBR_min_bitrate_kbps( gfp, 32);
lame_set_VBR_max_bitrate_kbps( gfp, 320);
}
}
// Set bitrate
lame_set_brate( gfp, my_AvgBytesPerSec * 8 / 1000 );
/// \todo Get the mode from the default configuration
// Set copyright flag?
lame_set_copyright( gfp, the_Properties.GetCopyrightMode()?1:0 );
// Do we have to tag it as non original
lame_set_original( gfp, the_Properties.GetOriginalMode()?1:0 );
// Add CRC?
lame_set_error_protection( gfp, the_Properties.GetCRCMode()?1:0 );
// Set private bit?
lame_set_extension( gfp, the_Properties.GetPrivateMode()?1:0 );
// INFO tag support not possible in ACM - it requires rewinding
// output stream to the beginning after encoding is finished.
lame_set_bWriteVbrTag( gfp, 0 );
if (0 == lame_init_params( gfp ))
{
//LAME encoding call will accept any number of samples.
if ( 0 == lame_get_version( gfp ) )
{
// For MPEG-II, only 576 samples per frame per channel
my_SamplesPerBlock = 576 * lame_get_num_channels( gfp );
}
else
{
// For MPEG-I, 1152 samples per frame per channel
my_SamplesPerBlock = 1152 * lame_get_num_channels( gfp );
}
}
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "version =%d",lame_get_version( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Layer =3");
switch ( lame_get_mode( gfp ) )
{
case STEREO: my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "mode =Stereo" ); break;
case JOINT_STEREO: my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "mode =Joint-Stereo" ); break;
case DUAL_CHANNEL: my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "mode =Forced Stereo" ); break;
case MONO: my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "mode =Mono" ); break;
case NOT_SET: /* FALLTROUGH */
default: my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "mode =Error (unknown)" ); break;
}
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "sampling frequency =%.1f kHz", lame_get_in_samplerate( gfp ) /1000.0 );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "bitrate =%d kbps", lame_get_brate( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Vbr Min bitrate =%d kbps", lame_get_VBR_min_bitrate_kbps( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Vbr Max bitrate =%d kbps", lame_get_VBR_max_bitrate_kbps( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Quality Setting =%d", lame_get_quality( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Low pass frequency =%d", lame_get_lowpassfreq( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Low pass width =%d", lame_get_lowpasswidth( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "High pass frequency =%d", lame_get_highpassfreq( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "High pass width =%d", lame_get_highpasswidth( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "No Short Blocks =%d", lame_get_no_short_blocks( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "de-emphasis =%d", lame_get_emphasis( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "private flag =%d", lame_get_extension( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "copyright flag =%d", lame_get_copyright( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "original flag =%d", lame_get_original( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "CRC =%s", lame_get_error_protection( gfp ) ? "on" : "off" );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Fast mode =%s", ( lame_get_quality( gfp ) )? "enabled" : "disabled" );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Force mid/side stereo =%s", ( lame_get_force_ms( gfp ) )?"enabled":"disabled" );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Padding Type =%d", lame_get_padding_type( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Disable Resorvoir =%d", lame_get_disable_reservoir( gfp ) );
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "VBR =%s, VBR_q =%d, VBR method =",
( lame_get_VBR( gfp ) !=vbr_off ) ? "enabled": "disabled",
lame_get_VBR_q( gfp ) );
switch ( lame_get_VBR( gfp ) )
{
case vbr_off: my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "vbr_off" ); break;
case vbr_mt : my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "vbr_mt" ); break;
case vbr_rh : my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "vbr_rh" ); break;
case vbr_mtrh: my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "vbr_mtrh" ); break;
case vbr_abr:
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "vbr_abr (average bitrate %d kbps)", lame_get_VBR_mean_bitrate_kbps( gfp ) );
break;
default:
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "error, unknown VBR setting");
break;
}
my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "Write VBR Header =%s\n", ( lame_get_bWriteVbrTag( gfp ) ) ?"Yes":"No");
#ifdef FROM_DLL
beConfig.format.LHV1.dwReSampleRate = my_OutBytesPerSec; // force the user resampling
#endif // FROM_DLL
bResult = true;
return bResult;
}
void lame_encoder_impl_internal::set_vbr_mean_bitrate_kbps(int _Bitrate)
{
int lameRet = lame_set_VBR_mean_bitrate_kbps(m_Lame.get(), _Bitrate);
DT_LAME_CHECK_ERR(lameRet);
}
int
lame_init_params(lame_global_flags * gfp)
{
int i;
int j;
lame_internal_flags *const gfc = gfp->internal_flags;
SessionConfig_t *const cfg = &gfc->cfg;
gfc->class_id = 0;
cfg->enforce_min_bitrate = gfp->VBR_hard_min;
cfg->analysis = gfp->analysis;
if (cfg->analysis)
gfp->write_lame_tag = 0;
/* some file options not allowed if output is: not specified or stdout */
if (gfc->pinfo != NULL)
gfp->write_lame_tag = 0; /* disable Xing VBR tag */
/* report functions */
gfc->report_msg = gfp->report.msgf;
gfc->report_dbg = gfp->report.debugf;
gfc->report_err = gfp->report.errorf;
if (gfp->asm_optimizations.amd3dnow)
gfc->CPU_features.AMD_3DNow = has_3DNow();
else
gfc->CPU_features.AMD_3DNow = 0;
if (gfp->asm_optimizations.mmx)
gfc->CPU_features.MMX = has_MMX();
else
gfc->CPU_features.MMX = 0;
if (gfp->asm_optimizations.sse) {
gfc->CPU_features.SSE = has_SSE();
gfc->CPU_features.SSE2 = has_SSE2();
}
else {
gfc->CPU_features.SSE = 0;
gfc->CPU_features.SSE2 = 0;
}
if (NULL == gfc->ATH)
gfc->ATH = calloc(1, sizeof(ATH_t));
if (NULL == gfc->ATH)
return -2; /* maybe error codes should be enumerated in lame.h ?? */
if (NULL == gfc->sv_rpg.rgdata)
gfc->sv_rpg.rgdata = calloc(1, sizeof(replaygain_t));
if (NULL == gfc->sv_rpg.rgdata) {
freegfc(gfc);
gfp->internal_flags = NULL;
return -2;
}
cfg->error_protection = gfp->error_protection;
cfg->copyright = gfp->copyright;
cfg->original = gfp->original;
cfg->extension = gfp->extension;
cfg->emphasis = gfp->emphasis;
cfg->channels_in = gfp->num_channels;
if (cfg->channels_in == 1)
gfp->mode = MONO;
cfg->channels_out = (gfp->mode == MONO) ? 1 : 2;
if (gfp->mode == MONO)
gfp->force_ms = 0; /* don't allow forced mid/side stereo for mono output */
cfg->force_ms = gfp->force_ms;
if (gfp->VBR == vbr_off && gfp->VBR_mean_bitrate_kbps != 128 && gfp->brate == 0)
gfp->brate = gfp->VBR_mean_bitrate_kbps;
switch (gfp->VBR) {
case vbr_off:
case vbr_mtrh:
case vbr_mt:
/* these modes can handle free format condition */
break;
default:
gfp->free_format = 0; /* mode can't be mixed with free format */
break;
}
cfg->free_format = gfp->free_format;
if (gfp->VBR == vbr_off && gfp->brate == 0) {
/* no bitrate or compression ratio specified, use 11.025 */
if (EQ(gfp->compression_ratio, 0))
gfp->compression_ratio = 11.025; /* rate to compress a CD down to exactly 128000 bps */
}
/* find bitrate if user specify a compression ratio */
if (gfp->VBR == vbr_off && gfp->compression_ratio > 0) {
if (gfp->samplerate_out == 0)
gfp->samplerate_out = map2MP3Frequency((int) (0.97 * gfp->samplerate_in)); /* round up with a margin of 3% */
/* choose a bitrate for the output samplerate which achieves
* specified compression ratio
*/
gfp->brate = gfp->samplerate_out * 16 * cfg->channels_out / (1.e3 * gfp->compression_ratio);
/* we need the version for the bitrate table look up */
cfg->samplerate_index = SmpFrqIndex(gfp->samplerate_out, &cfg->version);
if (!cfg->free_format) /* for non Free Format find the nearest allowed bitrate */
gfp->brate = FindNearestBitrate(gfp->brate, cfg->version, gfp->samplerate_out);
}
if (gfp->samplerate_out) {
if (gfp->samplerate_out < 16000) {
gfp->VBR_mean_bitrate_kbps = Max(gfp->VBR_mean_bitrate_kbps, 8);
gfp->VBR_mean_bitrate_kbps = Min(gfp->VBR_mean_bitrate_kbps, 64);
}
else if (gfp->samplerate_out < 32000) {
gfp->VBR_mean_bitrate_kbps = Max(gfp->VBR_mean_bitrate_kbps, 8);
gfp->VBR_mean_bitrate_kbps = Min(gfp->VBR_mean_bitrate_kbps, 160);
}
else {
gfp->VBR_mean_bitrate_kbps = Max(gfp->VBR_mean_bitrate_kbps, 32);
gfp->VBR_mean_bitrate_kbps = Min(gfp->VBR_mean_bitrate_kbps, 320);
}
}
/* WORK IN PROGRESS */
/* mapping VBR scale to internal VBR quality settings */
if (gfp->samplerate_out == 0 && (gfp->VBR == vbr_mt || gfp->VBR == vbr_mtrh)) {
float const qval = gfp->VBR_q + gfp->VBR_q_frac;
struct q_map { int sr_a; float qa, qb, ta, tb; int lp; };
struct q_map const m[9]
= { {48000, 0.0,6.5, 0.0,6.5, 23700}
, {44100, 0.0,6.5, 0.0,6.5, 21780}
, {32000, 6.5,8.0, 5.2,6.5, 15800}
, {24000, 8.0,8.5, 5.2,6.0, 11850}
, {22050, 8.5,9.01, 5.2,6.5, 10892}
, {16000, 9.01,9.4, 4.9,6.5, 7903}
, {12000, 9.4,9.6, 4.5,6.0, 5928}
, {11025, 9.6,9.9, 5.1,6.5, 5446}
, { 8000, 9.9,10., 4.9,6.5, 3952}
};
for (i = 2; i < 9; ++i) {
if (gfp->samplerate_in == m[i].sr_a) {
if (qval < m[i].qa) {
double d = qval / m[i].qa;
d = d * m[i].ta;
gfp->VBR_q = (int)d;
gfp->VBR_q_frac = d - gfp->VBR_q;
}
}
if (gfp->samplerate_in >= m[i].sr_a) {
if (m[i].qa <= qval && qval < m[i].qb) {
float const q_ = m[i].qb-m[i].qa;
float const t_ = m[i].tb-m[i].ta;
double d = m[i].ta + t_ * (qval-m[i].qa) / q_;
gfp->VBR_q = (int)d;
gfp->VBR_q_frac = d - gfp->VBR_q;
gfp->samplerate_out = m[i].sr_a;
if (gfp->lowpassfreq == 0) {
gfp->lowpassfreq = -1;
}
break;
}
}
}
}
/****************************************************************/
/* if a filter has not been enabled, see if we should add one: */
/****************************************************************/
if (gfp->lowpassfreq == 0) {
double lowpass = 16000;
double highpass;
switch (gfp->VBR) {
case vbr_off:{
optimum_bandwidth(&lowpass, &highpass, gfp->brate);
break;
}
case vbr_abr:{
optimum_bandwidth(&lowpass, &highpass, gfp->VBR_mean_bitrate_kbps);
break;
}
case vbr_rh:{
int const x[11] = {
19500, 19000, 18600, 18000, 17500, 16000, 15600, 14900, 12500, 10000, 3950
};
if (0 <= gfp->VBR_q && gfp->VBR_q <= 9) {
double a = x[gfp->VBR_q], b = x[gfp->VBR_q + 1], m = gfp->VBR_q_frac;
lowpass = linear_int(a, b, m);
}
else {
lowpass = 19500;
}
break;
}
case vbr_mtrh:
case vbr_mt:{
int const x[11] = {
24000, 19500, 18500, 18000, 17500, 17000, 16500, 15600, 15200, 7230, 3950
};
if (0 <= gfp->VBR_q && gfp->VBR_q <= 9) {
double a = x[gfp->VBR_q], b = x[gfp->VBR_q + 1], m = gfp->VBR_q_frac;
lowpass = linear_int(a, b, m);
}
else {
lowpass = 21500;
}
break;
}
default:{
int const x[11] = {
19500, 19000, 18500, 18000, 17500, 16500, 15500, 14500, 12500, 9500, 3950
};
if (0 <= gfp->VBR_q && gfp->VBR_q <= 9) {
double a = x[gfp->VBR_q], b = x[gfp->VBR_q + 1], m = gfp->VBR_q_frac;
lowpass = linear_int(a, b, m);
}
else {
lowpass = 19500;
}
}
}
if (gfp->mode == MONO && (gfp->VBR == vbr_off || gfp->VBR == vbr_abr))
lowpass *= 1.5;
gfp->lowpassfreq = lowpass;
}
if (gfp->samplerate_out == 0) {
if (2 * gfp->lowpassfreq > gfp->samplerate_in) {
gfp->lowpassfreq = gfp->samplerate_in / 2;
}
gfp->samplerate_out = optimum_samplefreq((int) gfp->lowpassfreq, gfp->samplerate_in);
}
if (gfp->VBR == vbr_mt || gfp->VBR == vbr_mtrh) {
gfp->lowpassfreq = Min(24000, gfp->lowpassfreq);
}
else {
gfp->lowpassfreq = Min(20500, gfp->lowpassfreq);
}
gfp->lowpassfreq = Min(gfp->samplerate_out / 2, gfp->lowpassfreq);
if (gfp->VBR == vbr_off) {
gfp->compression_ratio = gfp->samplerate_out * 16 * cfg->channels_out / (1.e3 * gfp->brate);
}
if (gfp->VBR == vbr_abr) {
gfp->compression_ratio =
gfp->samplerate_out * 16 * cfg->channels_out / (1.e3 * gfp->VBR_mean_bitrate_kbps);
}
/* do not compute ReplayGain values and do not find the peak sample
if we can't store them */
if (!gfp->write_lame_tag) {
gfp->findReplayGain = 0;
gfp->decode_on_the_fly = 0;
cfg->findPeakSample = 0;
}
cfg->findReplayGain = gfp->findReplayGain;
cfg->decode_on_the_fly = gfp->decode_on_the_fly;
if (cfg->decode_on_the_fly)
cfg->findPeakSample = 1;
if (cfg->findReplayGain) {
if (InitGainAnalysis(gfc->sv_rpg.rgdata, gfp->samplerate_out) == INIT_GAIN_ANALYSIS_ERROR) {
freegfc(gfc);
gfp->internal_flags = NULL;
return -6;
}
}
#ifdef DECODE_ON_THE_FLY
if (cfg->decode_on_the_fly && !gfp->decode_only) {
if (gfc->hip) {
hip_decode_exit(gfc->hip);
}
gfc->hip = hip_decode_init();
/* report functions */
hip_set_errorf(gfc->hip, gfp->report.errorf);
hip_set_debugf(gfc->hip, gfp->report.debugf);
hip_set_msgf(gfc->hip, gfp->report.msgf);
}
#endif
cfg->disable_reservoir = gfp->disable_reservoir;
cfg->lowpassfreq = gfp->lowpassfreq;
cfg->highpassfreq = gfp->highpassfreq;
cfg->samplerate_in = gfp->samplerate_in;
cfg->samplerate_out = gfp->samplerate_out;
cfg->mode_gr = cfg->samplerate_out <= 24000 ? 1 : 2; /* Number of granules per frame */
gfc->ov_enc.encoder_delay = ENCDELAY;
/*
* sample freq bitrate compression ratio
* [kHz] [kbps/channel] for 16 bit input
* 44.1 56 12.6
* 44.1 64 11.025
* 44.1 80 8.82
* 22.05 24 14.7
* 22.05 32 11.025
* 22.05 40 8.82
* 16 16 16.0
* 16 24 10.667
*
*/
/*
* For VBR, take a guess at the compression_ratio.
* For example:
*
* VBR_q compression like
* - 4.4 320 kbps/44 kHz
* 0...1 5.5 256 kbps/44 kHz
* 2 7.3 192 kbps/44 kHz
* 4 8.8 160 kbps/44 kHz
* 6 11 128 kbps/44 kHz
* 9 14.7 96 kbps
*
* for lower bitrates, downsample with --resample
*/
switch (gfp->VBR) {
case vbr_mt:
case vbr_rh:
case vbr_mtrh:
{
/*numbers are a bit strange, but they determine the lowpass value */
FLOAT const cmp[] = { 5.7, 6.5, 7.3, 8.2, 10, 11.9, 13, 14, 15, 16.5 };
gfp->compression_ratio = cmp[gfp->VBR_q];
}
break;
case vbr_abr:
gfp->compression_ratio =
cfg->samplerate_out * 16 * cfg->channels_out / (1.e3 * gfp->VBR_mean_bitrate_kbps);
break;
default:
gfp->compression_ratio = cfg->samplerate_out * 16 * cfg->channels_out / (1.e3 * gfp->brate);
break;
}
/* mode = -1 (not set by user) or
* mode = MONO (because of only 1 input channel).
* If mode has not been set, then select J-STEREO
*/
if (gfp->mode == NOT_SET) {
gfp->mode = JOINT_STEREO;
}
cfg->mode = gfp->mode;
/* apply user driven high pass filter */
if (cfg->highpassfreq > 0) {
cfg->highpass1 = 2. * cfg->highpassfreq;
if (gfp->highpasswidth >= 0)
cfg->highpass2 = 2. * (cfg->highpassfreq + gfp->highpasswidth);
else /* 0% above on default */
cfg->highpass2 = (1 + 0.00) * 2. * cfg->highpassfreq;
cfg->highpass1 /= cfg->samplerate_out;
cfg->highpass2 /= cfg->samplerate_out;
}
else {
cfg->highpass1 = 0;
cfg->highpass2 = 0;
}
/* apply user driven low pass filter */
cfg->lowpass1 = 0;
cfg->lowpass2 = 0;
if (cfg->lowpassfreq > 0 && cfg->lowpassfreq < (cfg->samplerate_out / 2) ) {
cfg->lowpass2 = 2. * cfg->lowpassfreq;
if (gfp->lowpasswidth >= 0) {
cfg->lowpass1 = 2. * (cfg->lowpassfreq - gfp->lowpasswidth);
if (cfg->lowpass1 < 0) /* has to be >= 0 */
cfg->lowpass1 = 0;
}
else { /* 0% below on default */
cfg->lowpass1 = (1 - 0.00) * 2. * cfg->lowpassfreq;
}
cfg->lowpass1 /= cfg->samplerate_out;
cfg->lowpass2 /= cfg->samplerate_out;
}
/**********************************************************************/
/* compute info needed for polyphase filter (filter type==0, default) */
/**********************************************************************/
lame_init_params_ppflt(gfc);
/*******************************************************
* samplerate and bitrate index
*******************************************************/
cfg->samplerate_index = SmpFrqIndex(cfg->samplerate_out, &cfg->version);
if (cfg->samplerate_index < 0) {
freegfc(gfc);
gfp->internal_flags = NULL;
return -1;
}
if (gfp->VBR == vbr_off) {
if (cfg->free_format) {
gfc->ov_enc.bitrate_index = 0;
}
else {
gfp->brate = FindNearestBitrate(gfp->brate, cfg->version, cfg->samplerate_out);
gfc->ov_enc.bitrate_index = BitrateIndex(gfp->brate, cfg->version, cfg->samplerate_out);
if (gfc->ov_enc.bitrate_index <= 0) {
freegfc(gfc);
gfp->internal_flags = NULL;
return -1;
}
}
}
else {
gfc->ov_enc.bitrate_index = 1;
}
init_bit_stream_w(gfc);
j = cfg->samplerate_index + (3 * cfg->version) + 6 * (cfg->samplerate_out < 16000);
for (i = 0; i < SBMAX_l + 1; i++)
gfc->scalefac_band.l[i] = sfBandIndex[j].l[i];
for (i = 0; i < PSFB21 + 1; i++) {
int const size = (gfc->scalefac_band.l[22] - gfc->scalefac_band.l[21]) / PSFB21;
int const start = gfc->scalefac_band.l[21] + i * size;
gfc->scalefac_band.psfb21[i] = start;
}
gfc->scalefac_band.psfb21[PSFB21] = 576;
for (i = 0; i < SBMAX_s + 1; i++)
gfc->scalefac_band.s[i] = sfBandIndex[j].s[i];
for (i = 0; i < PSFB12 + 1; i++) {
int const size = (gfc->scalefac_band.s[13] - gfc->scalefac_band.s[12]) / PSFB12;
int const start = gfc->scalefac_band.s[12] + i * size;
gfc->scalefac_band.psfb12[i] = start;
}
gfc->scalefac_band.psfb12[PSFB12] = 192;
/* determine the mean bitrate for main data */
if (cfg->mode_gr == 2) /* MPEG 1 */
cfg->sideinfo_len = (cfg->channels_out == 1) ? 4 + 17 : 4 + 32;
else /* MPEG 2 */
cfg->sideinfo_len = (cfg->channels_out == 1) ? 4 + 9 : 4 + 17;
if (cfg->error_protection)
cfg->sideinfo_len += 2;
gfc->class_id = LAME_ID;
{
int k;
for (k = 0; k < 19; k++)
gfc->sv_enc.pefirbuf[k] = 700 * cfg->mode_gr * cfg->channels_out;
if (gfp->ATHtype == -1)
gfp->ATHtype = 4;
}
assert(gfp->VBR_q <= 9);
assert(gfp->VBR_q >= 0);
switch (gfp->VBR) {
case vbr_mt:
case vbr_mtrh:{
if (gfp->strict_ISO < 0) {
gfp->strict_ISO = MDB_MAXIMUM;
}
if (gfp->useTemporal < 0) {
gfp->useTemporal = 0; /* off by default for this VBR mode */
}
(void) apply_preset(gfp, 500 - (gfp->VBR_q * 10), 0);
/* The newer VBR code supports only a limited
subset of quality levels:
9-5=5 are the same, uses x^3/4 quantization
4-0=0 are the same 5 plus best huffman divide code
*/
if (gfp->quality < 0)
gfp->quality = LAME_DEFAULT_QUALITY;
if (gfp->quality < 5)
gfp->quality = 0;
if (gfp->quality > 7)
gfp->quality = 7;
/* sfb21 extra only with MPEG-1 at higher sampling rates
*/
if (gfp->experimentalY)
gfc->sv_qnt.sfb21_extra = 0;
else
gfc->sv_qnt.sfb21_extra = (cfg->samplerate_out > 44000);
gfc->iteration_loop = VBR_new_iteration_loop;
break;
}
case vbr_rh:{
(void) apply_preset(gfp, 500 - (gfp->VBR_q * 10), 0);
/* sfb21 extra only with MPEG-1 at higher sampling rates
*/
if (gfp->experimentalY)
gfc->sv_qnt.sfb21_extra = 0;
else
gfc->sv_qnt.sfb21_extra = (cfg->samplerate_out > 44000);
/* VBR needs at least the output of GPSYCHO,
* so we have to garantee that by setting a minimum
* quality level, actually level 6 does it.
* down to level 6
*/
if (gfp->quality > 6)
gfp->quality = 6;
if (gfp->quality < 0)
gfp->quality = LAME_DEFAULT_QUALITY;
gfc->iteration_loop = VBR_old_iteration_loop;
break;
}
default: /* cbr/abr */ {
vbr_mode vbrmode;
/* no sfb21 extra with CBR code
*/
gfc->sv_qnt.sfb21_extra = 0;
if (gfp->quality < 0)
gfp->quality = LAME_DEFAULT_QUALITY;
vbrmode = gfp->VBR;
if (vbrmode == vbr_off)
(void) lame_set_VBR_mean_bitrate_kbps(gfp, gfp->brate);
/* second, set parameters depending on bitrate */
(void) apply_preset(gfp, gfp->VBR_mean_bitrate_kbps, 0);
gfp->VBR = vbrmode;
if (vbrmode == vbr_off) {
gfc->iteration_loop = CBR_iteration_loop;
}
else {
gfc->iteration_loop = ABR_iteration_loop;
}
break;
}
}
/*initialize default values common for all modes */
gfc->sv_qnt.mask_adjust = gfp->maskingadjust;
gfc->sv_qnt.mask_adjust_short = gfp->maskingadjust_short;
/* just another daily changing developer switch */
if (gfp->tune) {
gfc->sv_qnt.mask_adjust += gfp->tune_value_a;
gfc->sv_qnt.mask_adjust_short += gfp->tune_value_a;
}
if (gfp->VBR != vbr_off) { /* choose a min/max bitrate for VBR */
/* if the user didn't specify VBR_max_bitrate: */
cfg->vbr_min_bitrate_index = 1; /* default: allow 8 kbps (MPEG-2) or 32 kbps (MPEG-1) */
cfg->vbr_max_bitrate_index = 14; /* default: allow 160 kbps (MPEG-2) or 320 kbps (MPEG-1) */
if (cfg->samplerate_out < 16000)
cfg->vbr_max_bitrate_index = 8; /* default: allow 64 kbps (MPEG-2.5) */
if (gfp->VBR_min_bitrate_kbps) {
gfp->VBR_min_bitrate_kbps =
FindNearestBitrate(gfp->VBR_min_bitrate_kbps, cfg->version, cfg->samplerate_out);
cfg->vbr_min_bitrate_index =
BitrateIndex(gfp->VBR_min_bitrate_kbps, cfg->version, cfg->samplerate_out);
if (cfg->vbr_min_bitrate_index < 0)
return -1;
}
if (gfp->VBR_max_bitrate_kbps) {
gfp->VBR_max_bitrate_kbps =
FindNearestBitrate(gfp->VBR_max_bitrate_kbps, cfg->version, cfg->samplerate_out);
cfg->vbr_max_bitrate_index =
BitrateIndex(gfp->VBR_max_bitrate_kbps, cfg->version, cfg->samplerate_out);
if (cfg->vbr_max_bitrate_index < 0)
return -1;
}
gfp->VBR_min_bitrate_kbps = bitrate_table[cfg->version][cfg->vbr_min_bitrate_index];
gfp->VBR_max_bitrate_kbps = bitrate_table[cfg->version][cfg->vbr_max_bitrate_index];
gfp->VBR_mean_bitrate_kbps =
Min(bitrate_table[cfg->version][cfg->vbr_max_bitrate_index],
gfp->VBR_mean_bitrate_kbps);
gfp->VBR_mean_bitrate_kbps =
Max(bitrate_table[cfg->version][cfg->vbr_min_bitrate_index],
gfp->VBR_mean_bitrate_kbps);
}
cfg->preset = gfp->preset;
cfg->write_lame_tag = gfp->write_lame_tag;
cfg->vbr = gfp->VBR;
gfc->sv_qnt.substep_shaping = gfp->substep_shaping;
cfg->noise_shaping = gfp->noise_shaping;
cfg->subblock_gain = gfp->subblock_gain;
cfg->use_best_huffman = gfp->use_best_huffman;
cfg->avg_bitrate = gfp->brate;
cfg->vbr_avg_bitrate_kbps = gfp->VBR_mean_bitrate_kbps;
cfg->compression_ratio = gfp->compression_ratio;
/* initialize internal qval settings */
lame_init_qval(gfp);
/* automatic ATH adjustment on
*/
if (gfp->athaa_type < 0)
gfc->ATH->use_adjust = 3;
else
gfc->ATH->use_adjust = gfp->athaa_type;
/* initialize internal adaptive ATH settings -jd */
gfc->ATH->aa_sensitivity_p = pow(10.0, gfp->athaa_sensitivity / -10.0);
if (gfp->short_blocks == short_block_not_set) {
gfp->short_blocks = short_block_allowed;
}
/*Note Jan/2003: Many hardware decoders cannot handle short blocks in regular
stereo mode unless they are coupled (same type in both channels)
it is a rare event (1 frame per min. or so) that LAME would use
uncoupled short blocks, so lets turn them off until we decide
how to handle this. No other encoders allow uncoupled short blocks,
even though it is in the standard. */
/* rh 20040217: coupling makes no sense for mono and dual-mono streams
*/
if (gfp->short_blocks == short_block_allowed
&& (cfg->mode == JOINT_STEREO || cfg->mode == STEREO)) {
gfp->short_blocks = short_block_coupled;
}
cfg->short_blocks = gfp->short_blocks;
if (lame_get_quant_comp(gfp) < 0)
(void) lame_set_quant_comp(gfp, 1);
if (lame_get_quant_comp_short(gfp) < 0)
(void) lame_set_quant_comp_short(gfp, 0);
if (lame_get_msfix(gfp) < 0)
lame_set_msfix(gfp, 0);
/* select psychoacoustic model */
(void) lame_set_exp_nspsytune(gfp, lame_get_exp_nspsytune(gfp) | 1);
if (gfp->ATHtype < 0)
gfp->ATHtype = 4;
if (gfp->ATHcurve < 0)
gfp->ATHcurve = 4;
if (gfp->interChRatio < 0)
gfp->interChRatio = 0;
if (gfp->useTemporal < 0)
gfp->useTemporal = 1; /* on by default */
cfg->interChRatio = gfp->interChRatio;
cfg->msfix = gfp->msfix;
cfg->ATH_offset_db = 0-gfp->ATH_lower_db;
cfg->ATH_offset_factor = powf(10.f, cfg->ATH_offset_db * 0.1f);
cfg->ATHcurve = gfp->ATHcurve;
cfg->ATHtype = gfp->ATHtype;
cfg->ATHonly = gfp->ATHonly;
cfg->ATHshort = gfp->ATHshort;
cfg->noATH = gfp->noATH;
cfg->quant_comp = gfp->quant_comp;
cfg->quant_comp_short = gfp->quant_comp_short;
cfg->use_temporal_masking_effect = gfp->useTemporal;
cfg->use_safe_joint_stereo = gfp->exp_nspsytune & 2;
{
cfg->adjust_bass_db = (gfp->exp_nspsytune >> 2) & 63;
if (cfg->adjust_bass_db >= 32.f)
cfg->adjust_bass_db -= 64.f;
cfg->adjust_bass_db *= 0.25f;
cfg->adjust_alto_db = (gfp->exp_nspsytune >> 8) & 63;
if (cfg->adjust_alto_db >= 32.f)
cfg->adjust_alto_db -= 64.f;
cfg->adjust_alto_db *= 0.25f;
cfg->adjust_treble_db = (gfp->exp_nspsytune >> 14) & 63;
if (cfg->adjust_treble_db >= 32.f)
cfg->adjust_treble_db -= 64.f;
cfg->adjust_treble_db *= 0.25f;
/* to be compatible with Naoki's original code, the next 6 bits
* define only the amount of changing treble for sfb21 */
cfg->adjust_sfb21_db = (gfp->exp_nspsytune >> 20) & 63;
if (cfg->adjust_sfb21_db >= 32.f)
cfg->adjust_sfb21_db -= 64.f;
cfg->adjust_sfb21_db *= 0.25f;
cfg->adjust_sfb21_db += cfg->adjust_treble_db;
}
/* Setting up the PCM input data transform matrix, to apply
* user defined re-scaling, and or two-to-one channel downmix.
*/
{
FLOAT m[2][2] = { {1.0f, 0.0f}, {0.0f, 1.0f} };
/* user selected scaling of the samples */
m[0][0] *= gfp->scale;
m[0][1] *= gfp->scale;
m[1][0] *= gfp->scale;
m[1][1] *= gfp->scale;
/* user selected scaling of the channel 0 (left) samples */
m[0][0] *= gfp->scale_left;
m[0][1] *= gfp->scale_left;
/* user selected scaling of the channel 1 (right) samples */
m[1][0] *= gfp->scale_right;
m[1][1] *= gfp->scale_right;
/* Downsample to Mono if 2 channels in and 1 channel out */
if (cfg->channels_in == 2 && cfg->channels_out == 1) {
m[0][0] = 0.5f * (m[0][0] + m[1][0]);
m[0][1] = 0.5f * (m[0][1] + m[1][1]);
m[1][0] = 0;
m[1][1] = 0;
}
cfg->pcm_transform[0][0] = m[0][0];
cfg->pcm_transform[0][1] = m[0][1];
cfg->pcm_transform[1][0] = m[1][0];
cfg->pcm_transform[1][1] = m[1][1];
}
/* padding method as described in
* "MPEG-Layer3 / Bitstream Syntax and Decoding"
* by Martin Sieler, Ralph Sperschneider
*
* note: there is no padding for the very first frame
*
* Robert Hegemann 2000-06-22
*/
gfc->sv_enc.slot_lag = gfc->sv_enc.frac_SpF = 0;
if (cfg->vbr == vbr_off)
gfc->sv_enc.slot_lag = gfc->sv_enc.frac_SpF
= ((cfg->version + 1) * 72000L * cfg->avg_bitrate) % cfg->samplerate_out;
(void) lame_init_bitstream(gfp);
iteration_init(gfc);
(void) psymodel_init(gfp);
cfg->buffer_constraint = get_max_frame_buffer_size_by_constraint(cfg, gfp->strict_ISO);
return 0;
}
static int
apply_abr_preset(lame_global_flags * gfp, int preset, int enforce)
{
int k;
typedef struct {
int abr_kbps;
int quant_comp;
int quant_comp_s;
int safejoint;
FLOAT nsmsfix;
FLOAT st_lrm; /*short threshold */
FLOAT st_s;
FLOAT nsbass;
FLOAT scale;
FLOAT masking_adj;
FLOAT ath_lower;
FLOAT ath_curve;
FLOAT interch;
int sfscale;
} abr_presets_t;
/* *INDENT-OFF* */
/*
* Switch mappings for ABR mode
*/
const abr_presets_t abr_switch_map[] = {
/* kbps quant q_s safejoint nsmsfix st_lrm st_s ns-bass scale msk ath_lwr ath_curve interch , sfscale */
{ 8, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -30.0, 11, 0.0012, 1}, /* 8, impossible to use in stereo */
{ 16, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -25.0, 11, 0.0010, 1}, /* 16 */
{ 24, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -20.0, 11, 0.0010, 1}, /* 24 */
{ 32, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -15.0, 11, 0.0010, 1}, /* 32 */
{ 40, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -10.0, 11, 0.0009, 1}, /* 40 */
{ 48, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -10.0, 11, 0.0009, 1}, /* 48 */
{ 56, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -6.0, 11, 0.0008, 1}, /* 56 */
{ 64, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, -2.0, 11, 0.0008, 1}, /* 64 */
{ 80, 9, 9, 0, 0, 6.60, 145, 0, 0.95, 0, .0, 8, 0.0007, 1}, /* 80 */
{ 96, 9, 9, 0, 2.50, 6.60, 145, 0, 0.95, 0, 1.0, 5.5, 0.0006, 1}, /* 96 */
{112, 9, 9, 0, 2.25, 6.60, 145, 0, 0.95, 0, 2.0, 4.5, 0.0005, 1}, /* 112 */
{128, 9, 9, 0, 1.95, 6.40, 140, 0, 0.95, 0, 3.0, 4, 0.0002, 1}, /* 128 */
{160, 9, 9, 1, 1.79, 6.00, 135, 0, 0.95, -2, 5.0, 3.5, 0, 1}, /* 160 */
{192, 9, 9, 1, 1.49, 5.60, 125, 0, 0.97, -4, 7.0, 3, 0, 0}, /* 192 */
{224, 9, 9, 1, 1.25, 5.20, 125, 0, 0.98, -6, 9.0, 2, 0, 0}, /* 224 */
{256, 9, 9, 1, 0.97, 5.20, 125, 0, 1.00, -8, 10.0, 1, 0, 0}, /* 256 */
{320, 9, 9, 1, 0.90, 5.20, 125, 0, 1.00, -10, 12.0, 0, 0, 0} /* 320 */
};
/* *INDENT-ON* */
/* Variables for the ABR stuff */
int r;
int actual_bitrate = preset;
r = nearestBitrateFullIndex(preset);
(void) lame_set_VBR(gfp, vbr_abr);
(void) lame_set_VBR_mean_bitrate_kbps(gfp, (actual_bitrate));
(void) lame_set_VBR_mean_bitrate_kbps(gfp, min_int(lame_get_VBR_mean_bitrate_kbps(gfp), 320));
(void) lame_set_VBR_mean_bitrate_kbps(gfp, max_int(lame_get_VBR_mean_bitrate_kbps(gfp), 8));
(void) lame_set_brate(gfp, lame_get_VBR_mean_bitrate_kbps(gfp));
/* parameters for which there is no proper set/get interface */
if (abr_switch_map[r].safejoint > 0)
(void) lame_set_exp_nspsytune(gfp, lame_get_exp_nspsytune(gfp) | 2); /* safejoint */
if (abr_switch_map[r].sfscale > 0)
(void) lame_set_sfscale(gfp, 1);
/* ns-bass tweaks */
if (fabs(abr_switch_map[r].nsbass) > 0) {
k = (int) (abr_switch_map[r].nsbass * 4);
if (k < 0)
k += 64;
(void) lame_set_exp_nspsytune(gfp, lame_get_exp_nspsytune(gfp) | (k << 2));
}
SET_OPTION(quant_comp, abr_switch_map[r].quant_comp, -1);
SET_OPTION(quant_comp_short, abr_switch_map[r].quant_comp_s, -1);
SET_OPTION(msfix, abr_switch_map[r].nsmsfix, -1);
SET_OPTION(short_threshold_lrm, abr_switch_map[r].st_lrm, -1);
SET_OPTION(short_threshold_s, abr_switch_map[r].st_s, -1);
/* ABR seems to have big problems with clipping, especially at low bitrates */
/* so we compensate for that here by using a scale value depending on bitrate */
SET_OPTION(scale, abr_switch_map[r].scale, -1);
SET_OPTION(maskingadjust, abr_switch_map[r].masking_adj, 0);
if (abr_switch_map[r].masking_adj > 0) {
SET_OPTION(maskingadjust_short, abr_switch_map[r].masking_adj * .9, 0);
}
else {
SET_OPTION(maskingadjust_short, abr_switch_map[r].masking_adj * 1.1, 0);
}
SET_OPTION(ATHlower, abr_switch_map[r].ath_lower, 0);
SET_OPTION(ATHcurve, abr_switch_map[r].ath_curve, -1);
SET_OPTION(interChRatio, abr_switch_map[r].interch, -1);
return preset;
}
static gint mp3_open(void)
{
int imp3;
gfp = lame_init();
if (gfp == NULL)
return 0;
/* setup id3 data */
id3tag_init(gfp);
if (tuple) {
/* XXX write UTF-8 even though libmp3lame does id3v2.3. --yaz */
lameid3.track_name = tuple_get_str (tuple, FIELD_TITLE, NULL);
id3tag_set_title(gfp, lameid3.track_name);
lameid3.performer = tuple_get_str (tuple, FIELD_ARTIST, NULL);
id3tag_set_artist(gfp, lameid3.performer);
lameid3.album_name = tuple_get_str (tuple, FIELD_ALBUM, NULL);
id3tag_set_album(gfp, lameid3.album_name);
lameid3.genre = tuple_get_str (tuple, FIELD_GENRE, NULL);
id3tag_set_genre(gfp, lameid3.genre);
lameid3.year = str_printf ("%d", tuple_get_int (tuple, FIELD_YEAR, NULL));
id3tag_set_year(gfp, lameid3.year);
lameid3.track_number = str_printf ("%d", tuple_get_int (tuple, FIELD_TRACK_NUMBER, NULL));
id3tag_set_track(gfp, lameid3.track_number);
if (force_v2_val) {
id3tag_add_v2(gfp);
}
if (only_v1_val) {
id3tag_v1_only(gfp);
}
if (only_v2_val) {
id3tag_v2_only(gfp);
}
}
/* input stream description */
lame_set_in_samplerate(gfp, input.frequency);
lame_set_num_channels(gfp, input.channels);
/* Maybe implement this? */
/* lame_set_scale(lame_global_flags *, float); */
lame_set_out_samplerate(gfp, out_samplerate_val);
/* general control parameters */
lame_set_bWriteVbrTag(gfp, toggle_xing_val);
lame_set_quality(gfp, algo_quality_val);
if (audio_mode_val != 4) {
AUDDBG("set mode to %d\n", audio_mode_val);
lame_set_mode(gfp, audio_mode_val);
}
lame_set_errorf(gfp, lame_debugf);
lame_set_debugf(gfp, lame_debugf);
lame_set_msgf(gfp, lame_debugf);
if (enc_toggle_val == 0 && vbr_on == 0)
lame_set_brate(gfp, bitrate_val);
else if (vbr_on == 0)
lame_set_compression_ratio(gfp, compression_val);
/* frame params */
lame_set_copyright(gfp, mark_copyright_val);
lame_set_original(gfp, mark_original_val);
lame_set_error_protection(gfp, error_protect_val);
lame_set_strict_ISO(gfp, enforce_iso_val);
if (vbr_on != 0) {
if (vbr_type == 0)
lame_set_VBR(gfp, 2);
else
lame_set_VBR(gfp, 3);
lame_set_VBR_q(gfp, vbr_quality_val);
lame_set_VBR_mean_bitrate_kbps(gfp, abr_val);
lame_set_VBR_min_bitrate_kbps(gfp, vbr_min_val);
lame_set_VBR_max_bitrate_kbps(gfp, vbr_max_val);
lame_set_VBR_hard_min(gfp, enforce_min_val);
}
/* not to write id3 tag automatically. */
lame_set_write_id3tag_automatic(gfp, 0);
if (lame_init_params(gfp) == -1)
return 0;
/* write id3v2 header */
imp3 = lame_get_id3v2_tag(gfp, encbuffer, sizeof(encbuffer));
if (imp3 > 0) {
write_output(encbuffer, imp3);
id3v2_size = imp3;
}
else {
id3v2_size = 0;
}
write_buffer = NULL;
write_buffer_size = 0;
return 1;
}
