lame.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:41k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- * LAME MP3 encoding engine
- *
- * Copyright (c) 1999 Mark Taylor
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
- #include <assert.h>
- #ifdef HAVEGTK
- #include "gtkanal.h"
- #include <gtk/gtk.h>
- #endif
- #include "lame.h"
- #include "util.h"
- #include "timestatus.h"
- #include "psymodel.h"
- #include "newmdct.h"
- #include "quantize.h"
- #include "quantize-pvt.h"
- #include "l3bitstream.h"
- #include "formatBitstream.h"
- #include "version.h"
- #include "VbrTag.h"
- #include "id3tag.h"
- #include "tables.h"
- #include "brhist.h"
- #include "get_audio.h"
- #ifdef __riscos__
- #include "asmstuff.h"
- #endif
- /* Global variable definitions for lame.c */
- static Bit_stream_struc bs;
- static III_side_info_t l3_side;
- #define MFSIZE (1152+1152+ENCDELAY-MDCTDELAY)
- static short int mfbuf[2][MFSIZE];
- static int mf_size;
- static int mf_samples_to_encode;
- /********************************************************************
- * initialize internal params based on data in gf
- * (globalflags struct filled in by calling program)
- *
- ********************************************************************/
- void lame_init_params(lame_global_flags *gfp)
- {
- int i;
- FLOAT compression_ratio;
- memset(&bs, 0, sizeof(Bit_stream_struc));
- memset(&l3_side,0x00,sizeof(III_side_info_t));
- gfp->frameNum=0;
- InitFormatBitStream();
- if (gfp->num_channels==1) {
- gfp->mode = MPG_MD_MONO;
- }
- gfp->stereo=2;
- if (gfp->mode == MPG_MD_MONO) gfp->stereo=1;
- #ifdef BRHIST
- if (gfp->silent) {
- disp_brhist=0; /* turn of VBR historgram */
- }
- if (!gfp->VBR) {
- disp_brhist=0; /* turn of VBR historgram */
- }
- #endif
- /* set the output sampling rate, and resample options if necessary
- samplerate = input sample rate
- resamplerate = ouput sample rate
- */
- if (gfp->out_samplerate==0) {
- /* user did not specify output sample rate */
- gfp->out_samplerate=gfp->in_samplerate; /* default */
- /* if resamplerate is not valid, find a valid value */
- if (gfp->out_samplerate>=48000) gfp->out_samplerate=48000;
- else if (gfp->out_samplerate>=44100) gfp->out_samplerate=44100;
- else if (gfp->out_samplerate>=32000) gfp->out_samplerate=32000;
- else if (gfp->out_samplerate>=24000) gfp->out_samplerate=24000;
- else if (gfp->out_samplerate>=22050) gfp->out_samplerate=22050;
- else gfp->out_samplerate=16000;
- if (gfp->brate>0) {
- /* check if user specified bitrate requires downsampling */
- compression_ratio = gfp->out_samplerate*16*gfp->stereo/(1000.0*gfp->brate);
- if (!gfp->VBR && compression_ratio > 13 ) {
- /* automatic downsample, if possible */
- gfp->out_samplerate = (10*1000.0*gfp->brate)/(16*gfp->stereo);
- if (gfp->out_samplerate<=16000) gfp->out_samplerate=16000;
- else if (gfp->out_samplerate<=22050) gfp->out_samplerate=22050;
- else if (gfp->out_samplerate<=24000) gfp->out_samplerate=24000;
- else if (gfp->out_samplerate<=32000) gfp->out_samplerate=32000;
- else if (gfp->out_samplerate<=44100) gfp->out_samplerate=44100;
- else gfp->out_samplerate=48000;
- }
- }
- }
- gfp->mode_gr = (gfp->out_samplerate <= 24000) ? 1 : 2; /* mode_gr = 2 */
- gfp->encoder_delay = ENCDELAY;
- gfp->framesize = gfp->mode_gr*576;
- if (gfp->brate==0) { /* user didn't specify a bitrate, use default */
- gfp->brate=128;
- if (gfp->mode_gr==1) gfp->brate=64;
- }
- gfp->resample_ratio=1;
- if (gfp->out_samplerate != gfp->in_samplerate) gfp->resample_ratio = (FLOAT)gfp->in_samplerate/(FLOAT)gfp->out_samplerate;
- /* estimate total frames. must be done after setting sampling rate so
- * we know the framesize. */
- gfp->totalframes=0;
- gfp->totalframes = 2+ gfp->num_samples/(gfp->resample_ratio*gfp->framesize);
- /* 44.1kHz at 56kbs/channel: compression factor of 12.6
- 44.1kHz at 64kbs/channel: compression factor of 11.025
- 44.1kHz at 80kbs/channel: compression factor of 8.82
- 22.05kHz at 24kbs: 14.7
- 22.05kHz at 32kbs: 11.025
- 22.05kHz at 40kbs: 8.82
- 16kHz at 16kbs: 16.0
- 16kHz at 24kbs: 10.7
- compression_ratio
- 11 .70?
- 12 sox resample .66
- 14.7 sox resample .45
- */
- if (gfp->brate >= 320) gfp->VBR=0; /* dont bother with VBR at 320kbs */
- compression_ratio = gfp->out_samplerate*16*gfp->stereo/(1000.0*gfp->brate);
- /* for VBR, take a guess at the compression_ratio */
- /* VBR_q compression like
- 0 4.4 320kbs
- 1 5.4 256kbs
- 3 7.4 192kbs
- 4 8.8 160kbs
- 6 10.4 128kbs
- */
- if (gfp->VBR && compression_ratio>11) {
- compression_ratio = 4.4 + gfp->VBR_q;
- }
- /* At higher quality (lower compression) use STEREO instead of JSTEREO.
- * (unless the user explicitly specified a mode ) */
- if ( (!gfp->mode_fixed) && (gfp->mode !=MPG_MD_MONO)) {
- if (compression_ratio < 9 ) {
- gfp->mode = MPG_MD_STEREO;
- }
- }
- /****************************************************************/
- /* if a filter has not been enabled, see if we should add one: */
- /****************************************************************/
- if (gfp->lowpassfreq == 0) {
- /* If the user has not selected their own filter, add a lowpass
- * filter based on the compression ratio. Formula based on
- 44.1 /160 4.4x
- 44.1 /128 5.5x keep all bands
- 44.1 /96kbs 7.3x keep band 28
- 44.1 /80kbs 8.8x keep band 25
- 44.1khz/64kbs 11x keep band 21 22?
- 16khz/24kbs 10.7x keep band 21
- 22kHz/32kbs 11x keep band ?
- 22kHz/24kbs 14.7x keep band 16
- 16 16 16x keep band 14
- */
- /* Should we use some lowpass filters? */
- int band = 1+floor(.5 + 14-18*log(compression_ratio/16.0));
- if (band < 31) {
- gfp->lowpass1 = band/31.0;
- gfp->lowpass2 = band/31.0;
- }
- }
- /****************************************************************/
- /* apply user driven filters*/
- /****************************************************************/
- if ( gfp->highpassfreq > 0 ) {
- gfp->highpass1 = 2.0*gfp->highpassfreq/gfp->out_samplerate; /* will always be >=0 */
- if ( gfp->highpasswidth >= 0 ) {
- gfp->highpass2 = 2.0*(gfp->highpassfreq+gfp->highpasswidth)/gfp->out_samplerate;
- } else {
- /* 15% above on default */
- /* gfp->highpass2 = 1.15*2.0*gfp->highpassfreq/gfp->out_samplerate; */
- gfp->highpass2 = 1.00*2.0*gfp->highpassfreq/gfp->out_samplerate;
- }
- gfp->highpass1 = Min( 1, gfp->highpass1 );
- gfp->highpass2 = Min( 1, gfp->highpass2 );
- }
- if ( gfp->lowpassfreq > 0 ) {
- gfp->lowpass2 = 2.0*gfp->lowpassfreq/gfp->out_samplerate; /* will always be >=0 */
- if ( gfp->lowpasswidth >= 0 ) {
- gfp->lowpass1 = 2.0*(gfp->lowpassfreq-gfp->lowpasswidth)/gfp->out_samplerate;
- if ( gfp->lowpass1 < 0 ) { /* has to be >= 0 */
- gfp->lowpass1 = 0;
- }
- } else {
- /* 15% below on default */
- /* gfp->lowpass1 = 0.85*2.0*gfp->lowpassfreq/gfp->out_samplerate; */
- gfp->lowpass1 = 1.00*2.0*gfp->lowpassfreq/gfp->out_samplerate;
- }
- gfp->lowpass1 = Min( 1, gfp->lowpass1 );
- gfp->lowpass2 = Min( 1, gfp->lowpass2 );
- }
- /***************************************************************/
- /* compute info needed for polyphase filter */
- /***************************************************************/
- if (gfp->filter_type==0) {
- int band,maxband,minband;
- FLOAT8 amp,freq;
- if (gfp->lowpass1 > 0) {
- minband=999;
- maxband=-1;
- for (band=0; band <=31 ; ++band) {
- freq = band/31.0;
- amp = 1;
- /* this band and above will be zeroed: */
- if (freq >= gfp->lowpass2) {
- gfp->lowpass_band= Min(gfp->lowpass_band,band);
- amp=0;
- }
- if (gfp->lowpass1 < freq && freq < gfp->lowpass2) {
- minband = Min(minband,band);
- maxband = Max(maxband,band);
- amp = cos((PI/2)*(gfp->lowpass1-freq)/(gfp->lowpass2-gfp->lowpass1));
- }
- /* printf("lowpass band=%i amp=%f n",band,amp);*/
- }
- /* compute the *actual* transition band implemented by the polyphase filter */
- if (minband==999) gfp->lowpass1 = (gfp->lowpass_band-.75)/31.0;
- else gfp->lowpass1 = (minband-.75)/31.0;
- gfp->lowpass2 = gfp->lowpass_band/31.0;
- }
- /* make sure highpass filter is within 90% of whan the effective highpass
- * frequency will be */
- if (gfp->highpass2 > 0)
- if (gfp->highpass2 < .9*(.75/31.0) ) {
- gfp->highpass1=0; gfp->highpass2=0;
- fprintf(stderr,"Warning: highpass filter disabled. highpass frequency to smalln");
- }
- if (gfp->highpass2 > 0) {
- minband=999;
- maxband=-1;
- for (band=0; band <=31; ++band) {
- freq = band/31.0;
- amp = 1;
- /* this band and below will be zereod */
- if (freq <= gfp->highpass1) {
- gfp->highpass_band = Max(gfp->highpass_band,band);
- amp=0;
- }
- if (gfp->highpass1 < freq && freq < gfp->highpass2) {
- minband = Min(minband,band);
- maxband = Max(maxband,band);
- amp = cos((PI/2)*(gfp->highpass2-freq)/(gfp->highpass2-gfp->highpass1));
- }
- /* printf("highpass band=%i amp=%f n",band,amp);*/
- }
- /* compute the *actual* transition band implemented by the polyphase filter */
- gfp->highpass1 = gfp->highpass_band/31.0;
- if (maxband==-1) gfp->highpass2 = (gfp->highpass_band+.75)/31.0;
- else gfp->highpass2 = (maxband+.75)/31.0;
- }
- /*
- printf("lowpass band with amp=0: %i n",gfp->lowpass_band);
- printf("highpass band with amp=0: %i n",gfp->highpass_band);
- */
- }
- /***************************************************************/
- /* compute info needed for FIR filter */
- /***************************************************************/
- if (gfp->filter_type==1) {
- }
- gfp->mode_ext=MPG_MD_LR_LR;
- gfp->stereo = (gfp->mode == MPG_MD_MONO) ? 1 : 2;
- gfp->samplerate_index = SmpFrqIndex((long)gfp->out_samplerate, &gfp->version);
- if( gfp->samplerate_index < 0) {
- display_bitrates(stderr);
- exit(1);
- }
- if( (gfp->bitrate_index = BitrateIndex(gfp->brate, gfp->version,gfp->out_samplerate)) < 0) {
- display_bitrates(stderr);
- exit(1);
- }
- /* choose a min/max bitrate for VBR */
- if (gfp->VBR) {
- /* if the user didn't specify VBR_max_bitrate: */
- if (0==gfp->VBR_max_bitrate_kbps) {
- /* default max bitrate is 256kbs */
- /* we do not normally allow 320bps frams with VBR, unless: */
- gfp->VBR_max_bitrate=13; /* default: allow 256kbs */
- if (gfp->VBR_min_bitrate_kbps>=256) gfp->VBR_max_bitrate=14;
- if (gfp->VBR_q == 0) gfp->VBR_max_bitrate=14; /* allow 320kbs */
- if (gfp->VBR_q >= 4) gfp->VBR_max_bitrate=12; /* max = 224kbs */
- if (gfp->VBR_q >= 8) gfp->VBR_max_bitrate=9; /* low quality, max = 128kbs */
- }else{
- if( (gfp->VBR_max_bitrate = BitrateIndex(gfp->VBR_max_bitrate_kbps, gfp->version,gfp->out_samplerate)) < 0) {
- display_bitrates(stderr);
- exit(1);
- }
- }
- if (0==gfp->VBR_min_bitrate_kbps) {
- gfp->VBR_min_bitrate=1; /* 32 kbps */
- }else{
- if( (gfp->VBR_min_bitrate = BitrateIndex(gfp->VBR_min_bitrate_kbps, gfp->version,gfp->out_samplerate)) < 0) {
- display_bitrates(stderr);
- exit(1);
- }
- }
- }
- if (gfp->VBR) gfp->quality=Min(gfp->quality,2); /* always use quality <=2 with VBR */
- /* dont allow forced mid/side stereo for mono output */
- if (gfp->mode == MPG_MD_MONO) gfp->force_ms=0;
- /* Do not write VBR tag if VBR flag is not specified */
- if (gfp->VBR==0) gfp->bWriteVbrTag=0;
- /* some file options not allowed if output is: not specified or stdout */
- if (gfp->outPath!=NULL && gfp->outPath[0]=='-' ) {
- gfp->bWriteVbrTag=0; /* turn off VBR tag */
- }
- if (gfp->outPath==NULL || gfp->outPath[0]=='-' ) {
- id3tag.used=0; /* turn of id3 tagging */
- }
- if (gfp->gtkflag) {
- gfp->bWriteVbrTag=0; /* disable Xing VBR tag */
- }
- init_bit_stream_w(&bs);
- /* set internal feature flags. USER should not access these since
- * some combinations will produce strange results */
- /* no psymodel, no noise shaping */
- if (gfp->quality==9) {
- gfp->filter_type=0;
- gfp->psymodel=0;
- gfp->quantization=0;
- gfp->noise_shaping=0;
- gfp->noise_shaping_stop=0;
- gfp->use_best_huffman=0;
- }
- if (gfp->quality==8) gfp->quality=7;
- /* use psymodel (for short block and m/s switching), but no noise shapping */
- if (gfp->quality==7) {
- gfp->filter_type=0;
- gfp->psymodel=1;
- gfp->quantization=0;
- gfp->noise_shaping=0;
- gfp->noise_shaping_stop=0;
- gfp->use_best_huffman=0;
- }
- if (gfp->quality==6) gfp->quality=5;
- if (gfp->quality==5) {
- /* the default */
- gfp->filter_type=0;
- gfp->psymodel=1;
- gfp->quantization=0;
- gfp->noise_shaping=1;
- gfp->noise_shaping_stop=0;
- gfp->use_best_huffman=0;
- }
- if (gfp->quality==4) gfp->quality=2;
- if (gfp->quality==3) gfp->quality=2;
- if (gfp->quality==2) {
- gfp->filter_type=0;
- gfp->psymodel=1;
- gfp->quantization=1;
- gfp->noise_shaping=1;
- gfp->noise_shaping_stop=0;
- gfp->use_best_huffman=1;
- }
- if (gfp->quality==1) {
- gfp->filter_type=0;
- gfp->psymodel=1;
- gfp->quantization=1;
- gfp->noise_shaping=1;
- gfp->noise_shaping_stop=1;
- gfp->use_best_huffman=1;
- }
- if (gfp->quality==0) {
- /* 0..1 quality */
- gfp->filter_type=1; /* not yet coded */
- gfp->psymodel=1;
- gfp->quantization=1;
- gfp->noise_shaping=3; /* not yet coded */
- gfp->noise_shaping_stop=2; /* not yet coded */
- gfp->use_best_huffman=2; /* not yet coded */
- exit(-99);
- }
- for (i = 0; i < SBMAX_l + 1; i++) {
- scalefac_band.l[i] =
- sfBandIndex[gfp->samplerate_index + (gfp->version * 3)].l[i];
- }
- for (i = 0; i < SBMAX_s + 1; i++) {
- scalefac_band.s[i] =
- sfBandIndex[gfp->samplerate_index + (gfp->version * 3)].s[i];
- }
- if (gfp->bWriteVbrTag)
- {
- /* Write initial VBR Header to bitstream */
- InitVbrTag(&bs,1-gfp->version,gfp->mode,gfp->samplerate_index);
- }
- #ifdef HAVEGTK
- gtkflag=gfp->gtkflag;
- #endif
- #ifdef BRHIST
- if (gfp->VBR) {
- if (disp_brhist)
- brhist_init(gfp,1, 14);
- } else
- disp_brhist = 0;
- #endif
- return;
- }
- /************************************************************************
- *
- * print_config
- *
- * PURPOSE: Prints the encoding parameters used
- *
- ************************************************************************/
- void lame_print_config(lame_global_flags *gfp)
- {
- static const char *mode_names[4] = { "stereo", "j-stereo", "dual-ch", "single-ch" };
- FLOAT out_samplerate=gfp->out_samplerate/1000.0;
- FLOAT in_samplerate = gfp->resample_ratio*out_samplerate;
- FLOAT compression=
- (FLOAT)(gfp->stereo*16*out_samplerate)/(FLOAT)(gfp->brate);
- lame_print_version(stderr);
- if (gfp->num_channels==2 && gfp->stereo==1) {
- fprintf(stderr, "Autoconverting from stereo to mono. Setting encoding to mono mode.n");
- }
- if (gfp->resample_ratio!=1) {
- fprintf(stderr,"Resampling: input=%ikHz output=%ikHzn",
- (int)in_samplerate,(int)out_samplerate);
- }
- if (gfp->highpass2>0.0)
- fprintf(stderr, "Using polyphase highpass filter, transition band: %.0f Hz - %.0f Hzn",
- gfp->highpass1*out_samplerate*500,
- gfp->highpass2*out_samplerate*500);
- if (gfp->lowpass1>0.0)
- fprintf(stderr, "Using polyphase lowpass filter, transition band: %.0f Hz - %.0f Hzn",
- gfp->lowpass1*out_samplerate*500,
- gfp->lowpass2*out_samplerate*500);
- if (gfp->gtkflag) {
- fprintf(stderr, "Analyzing %s n",gfp->inPath);
- }
- else {
- fprintf(stderr, "Encoding %s to %sn",
- (strcmp(gfp->inPath, "-")? gfp->inPath : "stdin"),
- (strcmp(gfp->outPath, "-")? gfp->outPath : "stdout"));
- if (gfp->VBR)
- fprintf(stderr, "Encoding as %.1fkHz VBR(q=%i) %s MPEG%i LayerIII qval=%in",
- gfp->out_samplerate/1000.0,
- gfp->VBR_q,mode_names[gfp->mode],2-gfp->version,gfp->quality);
- else
- fprintf(stderr, "Encoding as %.1f kHz %d kbps %s MPEG%i LayerIII (%4.1fx) qval=%in",
- gfp->out_samplerate/1000.0,gfp->brate,
- mode_names[gfp->mode],2-gfp->version,compression,gfp->quality);
- }
- fflush(stderr);
- }
- /************************************************************************
- *
- * encodeframe() Layer 3
- *
- * encode a single frame
- *
- ************************************************************************
- lame_encode_frame()
- gr 0 gr 1
- inbuf: |--------------|---------------|-------------|
- MDCT output: |--------------|---------------|-------------|
- FFT's <---------1024---------->
- <---------1024-------->
- inbuf = buffer of PCM data size=MP3 framesize
- encoder acts on inbuf[ch][0], but output is delayed by MDCTDELAY
- so the MDCT coefficints are from inbuf[ch][-MDCTDELAY]
- psy-model FFT has a 1 granule day, so we feed it data for the next granule.
- FFT is centered over granule: 224+576+224
- So FFT starts at: 576-224-MDCTDELAY
- MPEG2: FFT ends at: BLKSIZE+576-224-MDCTDELAY
- MPEG1: FFT ends at: BLKSIZE+2*576-224-MDCTDELAY (1904)
- FFT starts at 576-224-MDCTDELAY (304) = 576-FFTOFFSET
- */
- int lame_encode_frame(lame_global_flags *gfp,
- short int inbuf_l[],short int inbuf_r[],
- int mf_size,char *mp3buf, int mp3buf_size)
- {
- static unsigned long frameBits;
- static unsigned long bitsPerSlot;
- static FLOAT8 frac_SpF;
- static FLOAT8 slot_lag;
- static unsigned long sentBits = 0;
- FLOAT8 xr[2][2][576];
- int l3_enc[2][2][576];
- int mp3count;
- III_psy_ratio masking_ratio[2][2]; /*LR ratios */
- III_psy_ratio masking_MS_ratio[2][2]; /*MS ratios */
- III_psy_ratio (*masking)[2][2]; /*LR ratios and MS ratios*/
- III_scalefac_t scalefac[2][2];
- short int *inbuf[2];
- typedef FLOAT8 pedata[2][2];
- pedata pe,pe_MS;
- pedata *pe_use;
- int ch,gr,mean_bits;
- int bitsPerFrame;
- int check_ms_stereo;
- static FLOAT8 ms_ratio[2]={0,0};
- FLOAT8 ms_ratio_next=0;
- FLOAT8 ms_ratio_prev=0;
- static FLOAT8 ms_ener_ratio[2]={0,0};
- memset((char *) masking_ratio, 0, sizeof(masking_ratio));
- memset((char *) masking_MS_ratio, 0, sizeof(masking_MS_ratio));
- memset((char *) scalefac, 0, sizeof(scalefac));
- inbuf[0]=inbuf_l;
- inbuf[1]=inbuf_r;
- gfp->mode_ext = MPG_MD_LR_LR;
- if (gfp->frameNum==0 ) {
- /* Figure average number of 'slots' per frame. */
- FLOAT8 avg_slots_per_frame;
- FLOAT8 sampfreq = gfp->out_samplerate/1000.0;
- int bit_rate = gfp->brate;
- sentBits = 0;
- bitsPerSlot = 8;
- avg_slots_per_frame = (bit_rate*gfp->framesize) /
- (sampfreq* bitsPerSlot);
- /* -f fast-math option causes some strange rounding here, be carefull: */
- frac_SpF = avg_slots_per_frame - floor(avg_slots_per_frame + 1e-9);
- if (fabs(frac_SpF) < 1e-9) frac_SpF = 0;
- slot_lag = -frac_SpF;
- gfp->padding = 1;
- if (frac_SpF==0) gfp->padding = 0;
- /* check FFT will not use a negative starting offset */
- assert(576>=FFTOFFSET);
- /* check if we have enough data for FFT */
- assert(mf_size>=(BLKSIZE+gfp->framesize-FFTOFFSET));
- }
- /********************** padding *****************************/
- switch (gfp->padding_type) {
- case 0:
- gfp->padding=0;
- break;
- case 1:
- gfp->padding=1;
- break;
- case 2:
- default:
- if (gfp->VBR) {
- gfp->padding=0;
- } else {
- if (gfp->disable_reservoir) {
- gfp->padding = 0;
- /* if the user specified --nores, dont very gfp->padding either */
- /* tiny changes in frac_SpF rounding will cause file differences */
- }else{
- if (frac_SpF != 0) {
- if (slot_lag > (frac_SpF-1.0) ) {
- slot_lag -= frac_SpF;
- gfp->padding = 0;
- }
- else {
- gfp->padding = 1;
- slot_lag += (1-frac_SpF);
- }
- }
- }
- }
- }
- /********************** status display *****************************/
- if (!gfp->gtkflag && !gfp->silent) {
- int mod = gfp->version == 0 ? 200 : 50;
- if (gfp->frameNum%mod==0) {
- timestatus(gfp->out_samplerate,gfp->frameNum,gfp->totalframes,gfp->framesize);
- #ifdef BRHIST
- if (disp_brhist)
- {
- brhist_add_count();
- brhist_disp();
- }
- #endif
- }
- }
- if (gfp->psymodel) {
- /* psychoacoustic model
- * psy model has a 1 granule (576) delay that we must compensate for
- * (mt 6/99).
- */
- short int *bufp[2]; /* address of beginning of left & right granule */
- int blocktype[2];
- ms_ratio_prev=ms_ratio[gfp->mode_gr-1];
- for (gr=0; gr < gfp->mode_gr ; gr++) {
- for ( ch = 0; ch < gfp->stereo; ch++ )
- bufp[ch] = &inbuf[ch][576 + gr*576-FFTOFFSET];
- L3psycho_anal( gfp,bufp, gr,
- &ms_ratio[gr],&ms_ratio_next,&ms_ener_ratio[gr],
- masking_ratio, masking_MS_ratio,
- pe[gr],pe_MS[gr],blocktype);
- for ( ch = 0; ch < gfp->stereo; ch++ )
- l3_side.gr[gr].ch[ch].tt.block_type=blocktype[ch];
- }
- }else{
- for (gr=0; gr < gfp->mode_gr ; gr++)
- for ( ch = 0; ch < gfp->stereo; ch++ ) {
- l3_side.gr[gr].ch[ch].tt.block_type=NORM_TYPE;
- pe[gr][ch]=700;
- }
- }
- /* block type flags */
- for( gr = 0; gr < gfp->mode_gr; gr++ ) {
- for ( ch = 0; ch < gfp->stereo; ch++ ) {
- gr_info *cod_info = &l3_side.gr[gr].ch[ch].tt;
- cod_info->mixed_block_flag = 0; /* never used by this model */
- if (cod_info->block_type == NORM_TYPE )
- cod_info->window_switching_flag = 0;
- else
- cod_info->window_switching_flag = 1;
- }
- }
- /* polyphase filtering / mdct */
- mdct_sub48(gfp,inbuf[0], inbuf[1], xr, &l3_side);
- /* use m/s gfp->stereo? */
- check_ms_stereo = (gfp->mode == MPG_MD_JOINT_STEREO);
- if (check_ms_stereo) {
- /* make sure block type is the same in each channel */
- check_ms_stereo =
- (l3_side.gr[0].ch[0].tt.block_type==l3_side.gr[0].ch[1].tt.block_type) &&
- (l3_side.gr[1].ch[0].tt.block_type==l3_side.gr[1].ch[1].tt.block_type);
- }
- if (check_ms_stereo) {
- /* ms_ratio = is like the ratio of side_energy/total_energy */
- FLOAT8 ms_ratio_ave,ms_ener_ratio_ave;
- /* ms_ratio_ave = .5*(ms_ratio[0] + ms_ratio[1]);*/
- ms_ratio_ave = .25*(ms_ratio[0] + ms_ratio[1]+
- ms_ratio_prev + ms_ratio_next);
- ms_ener_ratio_ave = .5*(ms_ener_ratio[0]+ms_ener_ratio[1]);
- if ( ms_ratio_ave <.35 /*&& ms_ener_ratio_ave<.75*/ ) gfp->mode_ext = MPG_MD_MS_LR;
- }
- if (gfp->force_ms) gfp->mode_ext = MPG_MD_MS_LR;
- #ifdef HAVEGTK
- if (gfp->gtkflag) {
- int j;
- for ( gr = 0; gr < gfp->mode_gr; gr++ ) {
- for ( ch = 0; ch < gfp->stereo; ch++ ) {
- pinfo->ms_ratio[gr]=ms_ratio[gr];
- pinfo->ms_ener_ratio[gr]=ms_ener_ratio[gr];
- pinfo->blocktype[gr][ch]=
- l3_side.gr[gr].ch[ch].tt.block_type;
- for ( j = 0; j < 576; j++ ) pinfo->xr[gr][ch][j]=xr[gr][ch][j];
- /* if MS stereo, switch to MS psy data */
- if (gfp->mode_ext==MPG_MD_MS_LR) {
- pinfo->pe[gr][ch]=pinfo->pe[gr][ch+2];
- pinfo->ers[gr][ch]=pinfo->ers[gr][ch+2];
- memcpy(pinfo->energy[gr][ch],pinfo->energy[gr][ch+2],
- sizeof(pinfo->energy[gr][ch]));
- }
- }
- }
- }
- #endif
- /* bit and noise allocation */
- if (MPG_MD_MS_LR == gfp->mode_ext) {
- masking = &masking_MS_ratio; /* use MS masking */
- pe_use=&pe_MS;
- } else {
- masking = &masking_ratio; /* use LR masking */
- pe_use=&pe;
- }
- /*
- VBR_iteration_loop_new( gfp,*pe_use, ms_ratio, xr, masking, &l3_side, l3_enc,
- &scalefac);
- */
- if (gfp->VBR) {
- VBR_iteration_loop( gfp,*pe_use, ms_ratio, xr, *masking, &l3_side, l3_enc,
- scalefac);
- }else{
- iteration_loop( gfp,*pe_use, ms_ratio, xr, *masking, &l3_side, l3_enc,
- scalefac);
- }
- #ifdef BRHIST
- brhist_temp[gfp->bitrate_index]++;
- #endif
- /* write the frame to the bitstream */
- getframebits(gfp,&bitsPerFrame,&mean_bits);
- III_format_bitstream( gfp,bitsPerFrame, l3_enc, &l3_side,
- scalefac, &bs);
- frameBits = bs.totbit - sentBits;
- if ( frameBits % bitsPerSlot ) /* a program failure */
- fprintf( stderr, "Sent %ld bits = %ld slots plus %ldn",
- frameBits, frameBits/bitsPerSlot,
- frameBits%bitsPerSlot );
- sentBits += frameBits;
- /* copy mp3 bit buffer into array */
- mp3count = copy_buffer(mp3buf,mp3buf_size,&bs);
- if (gfp->bWriteVbrTag) AddVbrFrame((int)(sentBits/8));
- #ifdef HAVEGTK
- if (gfp->gtkflag) {
- int j;
- for ( ch = 0; ch < gfp->stereo; ch++ ) {
- for ( j = 0; j < FFTOFFSET; j++ )
- pinfo->pcmdata[ch][j] = pinfo->pcmdata[ch][j+gfp->framesize];
- for ( j = FFTOFFSET; j < 1600; j++ ) {
- pinfo->pcmdata[ch][j] = inbuf[ch][j-FFTOFFSET];
- }
- }
- }
- #endif
- gfp->frameNum++;
- return mp3count;
- }
- int fill_buffer_resample(lame_global_flags *gfp,short int *outbuf,int desired_len,
- short int *inbuf,int len,int *num_used,int ch) {
- static FLOAT8 itime[2];
- #define OLDBUFSIZE 5
- static short int inbuf_old[2][OLDBUFSIZE];
- static int init[2]={0,0};
- int i,j=0,k,linear,value;
- if (gfp->frameNum==0 && !init[ch]) {
- init[ch]=1;
- itime[ch]=0;
- memset((char *) inbuf_old[ch], 0, sizeof(short int)*OLDBUFSIZE);
- }
- if (gfp->frameNum!=0) init[ch]=0; /* reset, for next time framenum=0 */
- /* if downsampling by an integer multiple, use linear resampling,
- * otherwise use quadratic */
- linear = ( fabs(gfp->resample_ratio - floor(.5+gfp->resample_ratio)) < .0001 );
- /* time of j'th element in inbuf = itime + j/ifreq; */
- /* time of k'th element in outbuf = j/ofreq */
- for (k=0;k<desired_len;k++) {
- int y0,y1,y2,y3;
- FLOAT8 x0,x1,x2,x3;
- FLOAT8 time0;
- time0 = k*gfp->resample_ratio; /* time of k'th output sample */
- j = floor( time0 -itime[ch] );
- /* itime[ch] + j; */ /* time of j'th input sample */
- if (j+2 >= len) break; /* not enough data in input buffer */
- x1 = time0-(itime[ch]+j);
- x2 = x1-1;
- y1 = (j<0) ? inbuf_old[ch][OLDBUFSIZE+j] : inbuf[j];
- y2 = ((1+j)<0) ? inbuf_old[ch][OLDBUFSIZE+1+j] : inbuf[1+j];
- /* linear resample */
- if (linear) {
- outbuf[k] = floor(.5 + (y2*x1-y1*x2) );
- } else {
- /* quadratic */
- x0 = x1+1;
- x3 = x1-2;
- y0 = ((j-1)<0) ? inbuf_old[ch][OLDBUFSIZE+(j-1)] : inbuf[j-1];
- y3 = ((j+2)<0) ? inbuf_old[ch][OLDBUFSIZE+(j+2)] : inbuf[j+2];
- value = floor(.5 +
- -y0*x1*x2*x3/6 + y1*x0*x2*x3/2 - y2*x0*x1*x3/2 +y3*x0*x1*x2/6
- );
- if (value > 32767) outbuf[k]=32767;
- else if (value < -32767) outbuf[k]=-32767;
- else outbuf[k]=value;
- /*
- printf("k=%i new=%i [ %i %i %i %i ]n",k,outbuf[k],
- y0,y1,y2,y3);
- */
- }
- }
- /* k = number of samples added to outbuf */
- /* last k sample used data from j,j+1, or j+1 overflowed buffer */
- /* remove num_used samples from inbuf: */
- *num_used = Min(len,j+2);
- itime[ch] += *num_used - k*gfp->resample_ratio;
- for (i=0;i<OLDBUFSIZE;i++)
- inbuf_old[ch][i]=inbuf[*num_used + i -OLDBUFSIZE];
- return k;
- }
- int fill_buffer(lame_global_flags *gfp,short int *outbuf,int desired_len,short int *inbuf,int len) {
- int j;
- j=Min(desired_len,len);
- memcpy( (char *) outbuf,(char *)inbuf,sizeof(short int)*j);
- return j;
- }
- /*
- * THE MAIN LAME ENCODING INTERFACE
- * mt 3/00
- *
- * input pcm data, output (maybe) mp3 frames.
- * This routine handles all buffering, resampling and filtering for you.
- * The required mp3buffer_size can be computed from num_samples,
- * samplerate and encoding rate, but here is a worst case estimate:
- *
- * mp3buffer_size in bytes = 1.25*num_samples + 7200
- *
- * return code = number of bytes output in mp3buffer. can be 0
- */
- int lame_encode_buffer(lame_global_flags *gfp,
- short int buffer_l[], short int buffer_r[],int nsamples,
- char *mp3buf, int mp3buf_size)
- {
- static int frame_buffered=0;
- int mp3size=0,ret,i,ch,mf_needed;
- short int *in_buffer[2];
- in_buffer[0] = buffer_l;
- in_buffer[1] = buffer_r;
- /* some sanity checks */
- assert(ENCDELAY>=MDCTDELAY);
- assert(BLKSIZE-FFTOFFSET >= 0);
- mf_needed = BLKSIZE+gfp->framesize-FFTOFFSET;
- assert(MFSIZE>=mf_needed);
- /* The reason for
- * int mf_samples_to_encode = ENCDELAY + 288;
- * ENCDELAY = internal encoder delay. And then we have to add 288
- * because of the 50% MDCT overlap. A 576 MDCT granule decodes to
- * 1152 samples. To synthesize the 576 samples centered under this granule
- * we need the previous granule for the first 288 samples (no problem), and
- * the next granule for the next 288 samples (not possible if this is last
- * granule). So we need to pad with 288 samples to make sure we can
- * encode the 576 samples we are interested in.
- */
- if (gfp->frameNum==0 && !frame_buffered) {
- memset((char *) mfbuf, 0, sizeof(mfbuf));
- frame_buffered=1;
- mf_samples_to_encode = ENCDELAY+288;
- mf_size=ENCDELAY-MDCTDELAY; /* we pad input with this many 0's */
- }
- if (gfp->frameNum==1) {
- /* reset, for the next time frameNum==0 */
- frame_buffered=0;
- }
- if (gfp->num_channels==2 && gfp->stereo==1) {
- /* downsample to mono */
- for (i=0; i<nsamples; ++i) {
- in_buffer[0][i]=((int)in_buffer[0][i]+(int)in_buffer[1][i])/2;
- in_buffer[1][i]=0;
- }
- }
- while (nsamples > 0) {
- int n_in=0;
- int n_out=0;
- /* copy in new samples */
- for (ch=0; ch<gfp->stereo; ch++) {
- if (gfp->resample_ratio!=1) {
- n_out=fill_buffer_resample(gfp,&mfbuf[ch][mf_size],gfp->framesize,
- in_buffer[ch],nsamples,&n_in,ch);
- } else {
- n_out=fill_buffer(gfp,&mfbuf[ch][mf_size],gfp->framesize,in_buffer[ch],nsamples);
- n_in = n_out;
- }
- in_buffer[ch] += n_in;
- }
- nsamples -= n_in;
- mf_size += n_out;
- assert(mf_size<=MFSIZE);
- mf_samples_to_encode += n_out;
- if (mf_size >= mf_needed) {
- /* encode the frame */
- ret = lame_encode_frame(gfp,mfbuf[0],mfbuf[1],mf_size,mp3buf,mp3buf_size);
- if (ret == -1) {
- /* fatel error: mp3buffer was too small */
- return -1;
- }
- mp3buf += ret;
- mp3size += ret;
- /* shift out old samples */
- mf_size -= gfp->framesize;
- mf_samples_to_encode -= gfp->framesize;
- for (ch=0; ch<gfp->stereo; ch++)
- for (i=0; i<mf_size; i++)
- mfbuf[ch][i]=mfbuf[ch][i+gfp->framesize];
- }
- }
- assert(nsamples==0);
- return mp3size;
- }
- int lame_encode_buffer_interleaved(lame_global_flags *gfp,
- short int buffer[], int nsamples, char *mp3buf, int mp3buf_size)
- {
- static int frame_buffered=0;
- int mp3size=0,ret,i,ch,mf_needed;
- /* some sanity checks */
- assert(ENCDELAY>=MDCTDELAY);
- assert(BLKSIZE-FFTOFFSET >= 0);
- mf_needed = BLKSIZE+gfp->framesize-FFTOFFSET;
- assert(MFSIZE>=mf_needed);
- if (gfp->num_channels == 1) {
- return lame_encode_buffer(gfp,buffer, NULL ,nsamples,mp3buf,mp3buf_size);
- }
- if (gfp->resample_ratio!=1) {
- short int *buffer_l;
- short int *buffer_r;
- buffer_l=malloc(sizeof(short int)*nsamples);
- buffer_r=malloc(sizeof(short int)*nsamples);
- if (buffer_l == NULL || buffer_r == NULL) {
- return -1;
- }
- for (i=0; i<nsamples; i++) {
- buffer_l[i]=buffer[2*i];
- buffer_r[i]=buffer[2*i+1];
- }
- ret = lame_encode_buffer(gfp,buffer_l,buffer_r,nsamples,mp3buf,mp3buf_size);
- free(buffer_l);
- free(buffer_r);
- return ret;
- }
- if (gfp->frameNum==0 && !frame_buffered) {
- memset((char *) mfbuf, 0, sizeof(mfbuf));
- frame_buffered=1;
- mf_samples_to_encode = ENCDELAY+288;
- mf_size=ENCDELAY-MDCTDELAY; /* we pad input with this many 0's */
- }
- if (gfp->frameNum==1) {
- /* reset, for the next time frameNum==0 */
- frame_buffered=0;
- }
- if (gfp->num_channels==2 && gfp->stereo==1) {
- /* downsample to mono */
- for (i=0; i<nsamples; ++i) {
- buffer[2*i]=((int)buffer[2*i]+(int)buffer[2*i+1])/2;
- buffer[2*i+1]=0;
- }
- }
- while (nsamples > 0) {
- int n_out;
- /* copy in new samples */
- n_out = Min(gfp->framesize,nsamples);
- for (i=0; i<n_out; ++i) {
- mfbuf[0][mf_size+i]=buffer[2*i];
- mfbuf[1][mf_size+i]=buffer[2*i+1];
- }
- buffer += 2*n_out;
- nsamples -= n_out;
- mf_size += n_out;
- assert(mf_size<=MFSIZE);
- mf_samples_to_encode += n_out;
- if (mf_size >= mf_needed) {
- /* encode the frame */
- ret = lame_encode_frame(gfp,mfbuf[0],mfbuf[1],mf_size,mp3buf,mp3buf_size);
- if (ret == -1) {
- /* fatel error: mp3buffer was too small */
- return -1;
- }
- mp3buf += ret;
- mp3size += ret;
- /* shift out old samples */
- mf_size -= gfp->framesize;
- mf_samples_to_encode -= gfp->framesize;
- for (ch=0; ch<gfp->stereo; ch++)
- for (i=0; i<mf_size; i++)
- mfbuf[ch][i]=mfbuf[ch][i+gfp->framesize];
- }
- }
- assert(nsamples==0);
- return mp3size;
- }
- /* old LAME interface */
- /* With this interface, it is the users responsibilty to keep track of the
- * buffered, unencoded samples. Thus mf_samples_to_encode is not incremented.
- *
- * lame_encode() is also used to flush the PCM input buffer by
- * lame_encode_finish()
- */
- int lame_encode(lame_global_flags *gfp, short int in_buffer[2][1152],char *mp3buf,int size){
- int imp3,save;
- save = mf_samples_to_encode;
- imp3= lame_encode_buffer(gfp,in_buffer[0],in_buffer[1],576*gfp->mode_gr,
- mp3buf,size);
- mf_samples_to_encode = save;
- return imp3;
- }
- /* initialize mp3 encoder */
- void lame_init(lame_global_flags *gfp)
- {
- /*
- * Disable floating point exepctions
- */
- #ifdef __FreeBSD__
- # include <floatingpoint.h>
- {
- /* seet floating point mask to the Linux default */
- fp_except_t mask;
- mask=fpgetmask();
- /* if bit is set, we get SIGFPE on that error! */
- fpsetmask(mask & ~(FP_X_INV|FP_X_DZ));
- /* fprintf(stderr,"FreeBSD mask is 0x%xn",mask); */
- }
- #endif
- #if defined(__riscos__) && !defined(ABORTFP)
- /* Disable FPE's under RISC OS */
- /* if bit is set, we disable trapping that error! */
- /* _FPE_IVO : invalid operation */
- /* _FPE_DVZ : divide by zero */
- /* _FPE_OFL : overflow */
- /* _FPE_UFL : underflow */
- /* _FPE_INX : inexact */
- DisableFPETraps( _FPE_IVO | _FPE_DVZ | _FPE_OFL );
- #endif
- /*
- * Debugging stuff
- * The default is to ignore FPE's, unless compiled with -DABORTFP
- * so add code below to ENABLE FPE's.
- */
- #if defined(ABORTFP) && !defined(__riscos__)
- #if defined(_MSC_VER)
- {
- #include <float.h>
- unsigned int mask;
- mask=_controlfp( 0, 0 );
- mask&=~(_EM_OVERFLOW|_EM_UNDERFLOW|_EM_ZERODIVIDE|_EM_INVALID);
- mask=_controlfp( mask, _MCW_EM );
- }
- #elif defined(__CYGWIN__)
- # define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (*&cw))
- # define _FPU_SETCW(cw) __asm__ ("fldcw %0" : : "m" (*&cw))
- # define _EM_INEXACT 0x00000001 /* inexact (precision) */
- # define _EM_UNDERFLOW 0x00000002 /* underflow */
- # define _EM_OVERFLOW 0x00000004 /* overflow */
- # define _EM_ZERODIVIDE 0x00000008 /* zero divide */
- # define _EM_INVALID 0x00000010 /* invalid */
- {
- unsigned int mask;
- _FPU_GETCW(mask);
- /* Set the FPU control word to abort on most FPEs */
- mask &= ~(_EM_UNDERFLOW | _EM_OVERFLOW | _EM_ZERODIVIDE | _EM_INVALID);
- _FPU_SETCW(mask);
- }
- # else
- {
- # include <fpu_control.h>
- #ifndef _FPU_GETCW
- #define _FPU_GETCW(cw) __asm__ ("fnstcw %0" : "=m" (*&cw))
- #endif
- #ifndef _FPU_SETCW
- #define _FPU_SETCW(cw) __asm__ ("fldcw %0" : : "m" (*&cw))
- #endif
- unsigned int mask;
- _FPU_GETCW(mask);
- /* Set the Linux mask to abort on most FPE's */
- /* if bit is set, we _mask_ SIGFPE on that error! */
- /* mask &= ~( _FPU_MASK_IM | _FPU_MASK_ZM | _FPU_MASK_OM | _FPU_MASK_UM );*/
- mask &= ~( _FPU_MASK_IM | _FPU_MASK_ZM | _FPU_MASK_OM );
- _FPU_SETCW(mask);
- }
- #endif
- #endif /* ABORTFP && !__riscos__ */
- /* Global flags. set defaults here */
- gfp->allow_diff_short=0;
- gfp->ATHonly=0;
- gfp->noATH=0;
- gfp->bWriteVbrTag=1;
- gfp->cwlimit=0;
- gfp->disable_reservoir=0;
- gfp->experimentalX = 0;
- gfp->experimentalY = 0;
- gfp->experimentalZ = 0;
- gfp->frameNum=0;
- gfp->gtkflag=0;
- gfp->quality=5;
- gfp->input_format=sf_unknown;
- gfp->filter_type=0;
- gfp->lowpassfreq=0;
- gfp->highpassfreq=0;
- gfp->lowpasswidth=-1;
- gfp->highpasswidth=-1;
- gfp->lowpass1=0;
- gfp->lowpass2=0;
- gfp->highpass1=0;
- gfp->highpass2=0;
- gfp->lowpass_band=32;
- gfp->highpass_band=-1;
- gfp->no_short_blocks=0;
- gfp->resample_ratio=1;
- gfp->padding_type=2;
- gfp->padding=0;
- gfp->swapbytes=0;
- gfp->silent=0;
- gfp->totalframes=0;
- gfp->VBR=0;
- gfp->VBR_q=4;
- gfp->VBR_min_bitrate_kbps=0;
- gfp->VBR_max_bitrate_kbps=0;
- gfp->VBR_min_bitrate=1;
- gfp->VBR_max_bitrate=13;
- gfp->version = 1; /* =1 Default: MPEG-1 */
- gfp->mode = MPG_MD_JOINT_STEREO;
- gfp->mode_fixed=0;
- gfp->force_ms=0;
- gfp->brate=0;
- gfp->copyright=0;
- gfp->original=1;
- gfp->extension=0;
- gfp->error_protection=0;
- gfp->emphasis=0;
- gfp->in_samplerate=1000*44.1;
- gfp->out_samplerate=0;
- gfp->num_channels=2;
- gfp->num_samples=MAX_U_32_NUM;
- gfp->inPath=NULL;
- gfp->outPath=NULL;
- id3tag.used=0;
- }
- /*****************************************************************/
- /* flush internal mp3 buffers, */
- /*****************************************************************/
- int lame_encode_finish(lame_global_flags *gfp,char *mp3buffer, int mp3buffer_size)
- {
- int imp3,mp3count,mp3buffer_size_remaining;
- short int buffer[2][1152];
- memset((char *)buffer,0,sizeof(buffer));
- mp3count = 0;
- while (mf_samples_to_encode > 0) {
- mp3buffer_size_remaining = mp3buffer_size - mp3count;
- /* if user specifed buffer size = 0, dont check size */
- if (mp3buffer_size == 0) mp3buffer_size_remaining=0;
- imp3=lame_encode(gfp,buffer,mp3buffer,mp3buffer_size_remaining);
- if (imp3 == -1) {
- /* fatel error: mp3buffer too small */
- desalloc_buffer(&bs); /* Deallocate all buffers */
- return -1;
- }
- mp3buffer += imp3;
- mp3count += imp3;
- mf_samples_to_encode -= gfp->framesize;
- }
- gfp->frameNum--;
- if (!gfp->gtkflag && !gfp->silent) {
- timestatus(gfp->out_samplerate,gfp->frameNum,gfp->totalframes,gfp->framesize);
- #ifdef BRHIST
- if (disp_brhist)
- {
- brhist_add_count();
- brhist_disp();
- brhist_disp_total(gfp);
- }
- #endif
- fprintf(stderr,"n");
- fflush(stderr);
- }
- III_FlushBitstream();
- mp3buffer_size_remaining = mp3buffer_size - mp3count;
- /* if user specifed buffer size = 0, dont check size */
- if (mp3buffer_size == 0) mp3buffer_size_remaining=0;
- imp3= copy_buffer(mp3buffer,mp3buffer_size_remaining,&bs);
- if (imp3 == -1) {
- /* fatel error: mp3buffer too small */
- desalloc_buffer(&bs); /* Deallocate all buffers */
- return -1;
- }
- mp3count += imp3;
- desalloc_buffer(&bs); /* Deallocate all buffers */
- return mp3count;
- }
- /*****************************************************************/
- /* write VBR Xing header, and ID3 tag, if asked for */
- /*****************************************************************/
- void lame_mp3_tags(lame_global_flags *gfp)
- {
- if (gfp->bWriteVbrTag)
- {
- /* Calculate relative quality of VBR stream
- * 0=best, 100=worst */
- int nQuality=gfp->VBR_q*100/9;
- /* Write Xing header again */
- PutVbrTag(gfp->outPath,nQuality,1-gfp->version);
- }
- /* write an ID3 tag */
- if(id3tag.used) {
- id3_buildtag(&id3tag);
- id3_writetag(gfp->outPath, &id3tag);
- }
- }
- void lame_version(lame_global_flags *gfp,char *ostring) {
- strncpy(ostring,get_lame_version(),20);
- }