The Tor Browser: media/libvorbis/lib/vorbisenc.c@97036ab72558 (annotated)

media/libvorbis/lib/vorbisenc.c@97036ab72558 (annotated)

media/libvorbis/lib/vorbisenc.c

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /********************************************************************
  *                                                                  *
  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
  *                                                                  *
  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2009             *
  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  *                                                                  *
  ********************************************************************
  function: simple programmatic interface for encoder mode setup
  last mod: $Id: vorbisenc.c 17028 2010-03-25 05:22:15Z xiphmont $
  ********************************************************************/
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
 #include "vorbis/codec.h"
 #include "vorbis/vorbisenc.h"
 #include "codec_internal.h"
 #include "os.h"
 #include "misc.h"
 /* careful with this; it's using static array sizing to make managing
    all the modes a little less annoying.  If we use a residue backend
    with > 12 partition types, or a different division of iteration,
    this needs to be updated. */
 typedef struct {
   const static_codebook *books[12][4];
 } static_bookblock;
 typedef struct {
   int res_type;
   int limit_type; /* 0 lowpass limited, 1 point stereo limited */
   int grouping;
   const vorbis_info_residue0 *res;
   const static_codebook  *book_aux;
   const static_codebook  *book_aux_managed;
   const static_bookblock *books_base;
   const static_bookblock *books_base_managed;
 } vorbis_residue_template;
 typedef struct {
   const vorbis_info_mapping0    *map;
   const vorbis_residue_template *res;
 } vorbis_mapping_template;
 typedef struct vp_adjblock{
   int block[P_BANDS];
 } vp_adjblock;
 typedef struct {
   int data[NOISE_COMPAND_LEVELS];
 } compandblock;
 /* high level configuration information for setting things up
    step-by-step with the detailed vorbis_encode_ctl interface.
    There's a fair amount of redundancy such that interactive setup
    does not directly deal with any vorbis_info or codec_setup_info
    initialization; it's all stored (until full init) in this highlevel
    setup, then flushed out to the real codec setup structs later. */
 typedef struct {
   int att[P_NOISECURVES];
   float boost;
   float decay;
 } att3;
 typedef struct { int data[P_NOISECURVES]; } adj3;
 typedef struct {
   int   pre[PACKETBLOBS];
   int   post[PACKETBLOBS];
   float kHz[PACKETBLOBS];
   float lowpasskHz[PACKETBLOBS];
 } adj_stereo;
 typedef struct {
   int lo;
   int hi;
   int fixed;
 } noiseguard;
 typedef struct {
   int data[P_NOISECURVES][17];
 } noise3;
 typedef struct {
   int      mappings;
   const double  *rate_mapping;
   const double  *quality_mapping;
   int      coupling_restriction;
   long     samplerate_min_restriction;
   long     samplerate_max_restriction;
   const int     *blocksize_short;
   const int     *blocksize_long;
   const att3    *psy_tone_masteratt;
   const int     *psy_tone_0dB;
   const int     *psy_tone_dBsuppress;
   const vp_adjblock *psy_tone_adj_impulse;
   const vp_adjblock *psy_tone_adj_long;
   const vp_adjblock *psy_tone_adj_other;
   const noiseguard  *psy_noiseguards;
   const noise3      *psy_noise_bias_impulse;
   const noise3      *psy_noise_bias_padding;
   const noise3      *psy_noise_bias_trans;
   const noise3      *psy_noise_bias_long;
   const int         *psy_noise_dBsuppress;
   const compandblock  *psy_noise_compand;
   const double        *psy_noise_compand_short_mapping;
   const double        *psy_noise_compand_long_mapping;
   const int      *psy_noise_normal_start[2];
   const int      *psy_noise_normal_partition[2];
   const double   *psy_noise_normal_thresh;
   const int      *psy_ath_float;
   const int      *psy_ath_abs;
   const double   *psy_lowpass;
   const vorbis_info_psy_global *global_params;
   const double     *global_mapping;
   const adj_stereo *stereo_modes;
   const static_codebook *const *const *const floor_books;
   const vorbis_info_floor1 *floor_params;
   const int floor_mappings;
   const int **floor_mapping_list;
   const vorbis_mapping_template *maps;
 } ve_setup_data_template;
 /* a few static coder conventions */
 static const vorbis_info_mode _mode_template[2]={
   {0,0,0,0},
   {1,0,0,1}
 };
 static const vorbis_info_mapping0 _map_nominal[2]={
   {1, {0,0}, {0}, {0}, 1,{0},{1}},
   {1, {0,0}, {1}, {1}, 1,{0},{1}}
 };
 #include "modes/setup_44.h"
 #include "modes/setup_44u.h"
 #include "modes/setup_44p51.h"
 #include "modes/setup_32.h"
 #include "modes/setup_8.h"
 #include "modes/setup_11.h"
 #include "modes/setup_16.h"
 #include "modes/setup_22.h"
 #include "modes/setup_X.h"
 static const ve_setup_data_template *const setup_list[]={
   &ve_setup_44_stereo,
   &ve_setup_44_51,
   &ve_setup_44_uncoupled,
   &ve_setup_32_stereo,
   &ve_setup_32_uncoupled,
   &ve_setup_22_stereo,
   &ve_setup_22_uncoupled,
   &ve_setup_16_stereo,
   &ve_setup_16_uncoupled,
   &ve_setup_11_stereo,
   &ve_setup_11_uncoupled,
   &ve_setup_8_stereo,
   &ve_setup_8_uncoupled,
   &ve_setup_X_stereo,
   &ve_setup_X_uncoupled,
   &ve_setup_XX_stereo,
   &ve_setup_XX_uncoupled,
 
 };
 static void vorbis_encode_floor_setup(vorbis_info *vi,int s,
                                      const static_codebook *const *const *const books,
                                      const vorbis_info_floor1 *in,
                                      const int *x){
   int i,k,is=s;
   vorbis_info_floor1 *f=_ogg_calloc(1,sizeof(*f));
   codec_setup_info *ci=vi->codec_setup;
   memcpy(f,in+x[is],sizeof(*f));
   /* books */
   {
     int partitions=f->partitions;
     int maxclass=-1;
     int maxbook=-1;
     for(i=0;i<partitions;i++)
       if(f->partitionclass[i]>maxclass)maxclass=f->partitionclass[i];
     for(i=0;i<=maxclass;i++){
       if(f->class_book[i]>maxbook)maxbook=f->class_book[i];
       f->class_book[i]+=ci->books;
       for(k=0;k<(1<<f->class_subs[i]);k++){
         if(f->class_subbook[i][k]>maxbook)maxbook=f->class_subbook[i][k];
         if(f->class_subbook[i][k]>=0)f->class_subbook[i][k]+=ci->books;
       }
     }
     for(i=0;i<=maxbook;i++)
       ci->book_param[ci->books++]=(static_codebook *)books[x[is]][i];
   }
   /* for now, we're only using floor 1 */
   ci->floor_type[ci->floors]=1;
   ci->floor_param[ci->floors]=f;
   ci->floors++;
   return;
 }
 static void vorbis_encode_global_psych_setup(vorbis_info *vi,double s,
                                             const vorbis_info_psy_global *in,
                                             const double *x){
   int i,is=s;
   double ds=s-is;
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy_global *g=&ci->psy_g_param;
   memcpy(g,in+(int)x[is],sizeof(*g));
   ds=x[is]*(1.-ds)+x[is+1]*ds;
   is=(int)ds;
   ds-=is;
   if(ds==0 && is>0){
     is--;
     ds=1.;
   }
   /* interpolate the trigger threshholds */
   for(i=0;i<4;i++){
     g->preecho_thresh[i]=in[is].preecho_thresh[i]*(1.-ds)+in[is+1].preecho_thresh[i]*ds;
     g->postecho_thresh[i]=in[is].postecho_thresh[i]*(1.-ds)+in[is+1].postecho_thresh[i]*ds;
   }
   g->ampmax_att_per_sec=ci->hi.amplitude_track_dBpersec;
   return;
 }
 static void vorbis_encode_global_stereo(vorbis_info *vi,
                                         const highlevel_encode_setup *const hi,
                                         const adj_stereo *p){
   float s=hi->stereo_point_setting;
   int i,is=s;
   double ds=s-is;
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy_global *g=&ci->psy_g_param;
   if(p){
     memcpy(g->coupling_prepointamp,p[is].pre,sizeof(*p[is].pre)*PACKETBLOBS);
     memcpy(g->coupling_postpointamp,p[is].post,sizeof(*p[is].post)*PACKETBLOBS);
     if(hi->managed){
       /* interpolate the kHz threshholds */
       for(i=0;i<PACKETBLOBS;i++){
         float kHz=p[is].kHz[i]*(1.-ds)+p[is+1].kHz[i]*ds;
         g->coupling_pointlimit[0][i]=kHz*1000./vi->rate*ci->blocksizes[0];
         g->coupling_pointlimit[1][i]=kHz*1000./vi->rate*ci->blocksizes[1];
         g->coupling_pkHz[i]=kHz;
         kHz=p[is].lowpasskHz[i]*(1.-ds)+p[is+1].lowpasskHz[i]*ds;
         g->sliding_lowpass[0][i]=kHz*1000./vi->rate*ci->blocksizes[0];
         g->sliding_lowpass[1][i]=kHz*1000./vi->rate*ci->blocksizes[1];
       }
     }else{
       float kHz=p[is].kHz[PACKETBLOBS/2]*(1.-ds)+p[is+1].kHz[PACKETBLOBS/2]*ds;
       for(i=0;i<PACKETBLOBS;i++){
         g->coupling_pointlimit[0][i]=kHz*1000./vi->rate*ci->blocksizes[0];
         g->coupling_pointlimit[1][i]=kHz*1000./vi->rate*ci->blocksizes[1];
         g->coupling_pkHz[i]=kHz;
       }
       kHz=p[is].lowpasskHz[PACKETBLOBS/2]*(1.-ds)+p[is+1].lowpasskHz[PACKETBLOBS/2]*ds;
       for(i=0;i<PACKETBLOBS;i++){
         g->sliding_lowpass[0][i]=kHz*1000./vi->rate*ci->blocksizes[0];
         g->sliding_lowpass[1][i]=kHz*1000./vi->rate*ci->blocksizes[1];
       }
     }
   }else{
     for(i=0;i<PACKETBLOBS;i++){
       g->sliding_lowpass[0][i]=ci->blocksizes[0];
       g->sliding_lowpass[1][i]=ci->blocksizes[1];
     }
   }
   return;
 }
 static void vorbis_encode_psyset_setup(vorbis_info *vi,double s,
                                        const int *nn_start,
                                        const int *nn_partition,
                                        const double *nn_thresh,
                                        int block){
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy *p=ci->psy_param[block];
   highlevel_encode_setup *hi=&ci->hi;
   int is=s;
   if(block>=ci->psys)
     ci->psys=block+1;
   if(!p){
     p=_ogg_calloc(1,sizeof(*p));
     ci->psy_param[block]=p;
   }
   memcpy(p,&_psy_info_template,sizeof(*p));
   p->blockflag=block>>1;
   if(hi->noise_normalize_p){
     p->normal_p=1;
     p->normal_start=nn_start[is];
     p->normal_partition=nn_partition[is];
     p->normal_thresh=nn_thresh[is];
   }
   return;
 }
 static void vorbis_encode_tonemask_setup(vorbis_info *vi,double s,int block,
                                          const att3 *att,
                                          const int  *max,
                                          const vp_adjblock *in){
   int i,is=s;
   double ds=s-is;
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy *p=ci->psy_param[block];
   /* 0 and 2 are only used by bitmanagement, but there's no harm to always
      filling the values in here */
   p->tone_masteratt[0]=att[is].att[0]*(1.-ds)+att[is+1].att[0]*ds;
   p->tone_masteratt[1]=att[is].att[1]*(1.-ds)+att[is+1].att[1]*ds;
   p->tone_masteratt[2]=att[is].att[2]*(1.-ds)+att[is+1].att[2]*ds;
   p->tone_centerboost=att[is].boost*(1.-ds)+att[is+1].boost*ds;
   p->tone_decay=att[is].decay*(1.-ds)+att[is+1].decay*ds;
   p->max_curve_dB=max[is]*(1.-ds)+max[is+1]*ds;
   for(i=0;i<P_BANDS;i++)
     p->toneatt[i]=in[is].block[i]*(1.-ds)+in[is+1].block[i]*ds;
   return;
 }
 static void vorbis_encode_compand_setup(vorbis_info *vi,double s,int block,
                                         const compandblock *in,
                                         const double *x){
   int i,is=s;
   double ds=s-is;
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy *p=ci->psy_param[block];
   ds=x[is]*(1.-ds)+x[is+1]*ds;
   is=(int)ds;
   ds-=is;
   if(ds==0 && is>0){
     is--;
     ds=1.;
   }
   /* interpolate the compander settings */
   for(i=0;i<NOISE_COMPAND_LEVELS;i++)
     p->noisecompand[i]=in[is].data[i]*(1.-ds)+in[is+1].data[i]*ds;
   return;
 }
 static void vorbis_encode_peak_setup(vorbis_info *vi,double s,int block,
                                     const int *suppress){
   int is=s;
   double ds=s-is;
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy *p=ci->psy_param[block];
   p->tone_abs_limit=suppress[is]*(1.-ds)+suppress[is+1]*ds;
   return;
 }
 static void vorbis_encode_noisebias_setup(vorbis_info *vi,double s,int block,
                                          const int *suppress,
                                          const noise3 *in,
                                          const noiseguard *guard,
                                          double userbias){
   int i,is=s,j;
   double ds=s-is;
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy *p=ci->psy_param[block];
   p->noisemaxsupp=suppress[is]*(1.-ds)+suppress[is+1]*ds;
   p->noisewindowlomin=guard[block].lo;
   p->noisewindowhimin=guard[block].hi;
   p->noisewindowfixed=guard[block].fixed;
   for(j=0;j<P_NOISECURVES;j++)
     for(i=0;i<P_BANDS;i++)
       p->noiseoff[j][i]=in[is].data[j][i]*(1.-ds)+in[is+1].data[j][i]*ds;
   /* impulse blocks may take a user specified bias to boost the
      nominal/high noise encoding depth */
   for(j=0;j<P_NOISECURVES;j++){
     float min=p->noiseoff[j][0]+6; /* the lowest it can go */
     for(i=0;i<P_BANDS;i++){
       p->noiseoff[j][i]+=userbias;
       if(p->noiseoff[j][i]<min)p->noiseoff[j][i]=min;
     }
   }
   return;
 }
 static void vorbis_encode_ath_setup(vorbis_info *vi,int block){
   codec_setup_info *ci=vi->codec_setup;
   vorbis_info_psy *p=ci->psy_param[block];
   p->ath_adjatt=ci->hi.ath_floating_dB;
   p->ath_maxatt=ci->hi.ath_absolute_dB;
   return;
 }
 static int book_dup_or_new(codec_setup_info *ci,const static_codebook *book){
   int i;
   for(i=0;i<ci->books;i++)
     if(ci->book_param[i]==book)return(i);
   return(ci->books++);
 }
 static void vorbis_encode_blocksize_setup(vorbis_info *vi,double s,
                                          const int *shortb,const int *longb){
   codec_setup_info *ci=vi->codec_setup;
   int is=s;
   int blockshort=shortb[is];
   int blocklong=longb[is];
   ci->blocksizes[0]=blockshort;
   ci->blocksizes[1]=blocklong;
 }
 static void vorbis_encode_residue_setup(vorbis_info *vi,
                                         int number, int block,
                                         const vorbis_residue_template *res){
   codec_setup_info *ci=vi->codec_setup;
   int i;
   vorbis_info_residue0 *r=ci->residue_param[number]=
     _ogg_malloc(sizeof(*r));
   memcpy(r,res->res,sizeof(*r));
   if(ci->residues<=number)ci->residues=number+1;
   r->grouping=res->grouping;
   ci->residue_type[number]=res->res_type;
   /* fill in all the books */
   {
     int booklist=0,k;
     if(ci->hi.managed){
       for(i=0;i<r->partitions;i++)
         for(k=0;k<4;k++)
           if(res->books_base_managed->books[i][k])
             r->secondstages[i]|=(1<<k);
       r->groupbook=book_dup_or_new(ci,res->book_aux_managed);
       ci->book_param[r->groupbook]=(static_codebook *)res->book_aux_managed;
       for(i=0;i<r->partitions;i++){
         for(k=0;k<4;k++){
           if(res->books_base_managed->books[i][k]){
             int bookid=book_dup_or_new(ci,res->books_base_managed->books[i][k]);
             r->booklist[booklist++]=bookid;
             ci->book_param[bookid]=(static_codebook *)res->books_base_managed->books[i][k];
           }
         }
       }
     }else{
       for(i=0;i<r->partitions;i++)
         for(k=0;k<4;k++)
           if(res->books_base->books[i][k])
             r->secondstages[i]|=(1<<k);
       r->groupbook=book_dup_or_new(ci,res->book_aux);
       ci->book_param[r->groupbook]=(static_codebook *)res->book_aux;
       for(i=0;i<r->partitions;i++){
         for(k=0;k<4;k++){
           if(res->books_base->books[i][k]){
             int bookid=book_dup_or_new(ci,res->books_base->books[i][k]);
             r->booklist[booklist++]=bookid;
             ci->book_param[bookid]=(static_codebook *)res->books_base->books[i][k];
           }
         }
       }
     }
   }
   /* lowpass setup/pointlimit */
   {
     double freq=ci->hi.lowpass_kHz*1000.;
     vorbis_info_floor1 *f=ci->floor_param[block]; /* by convention */
     double nyq=vi->rate/2.;
     long blocksize=ci->blocksizes[block]>>1;
     /* lowpass needs to be set in the floor and the residue. */
     if(freq>nyq)freq=nyq;
     /* in the floor, the granularity can be very fine; it doesn't alter
        the encoding structure, only the samples used to fit the floor
        approximation */
     f->n=freq/nyq*blocksize;
     /* this res may by limited by the maximum pointlimit of the mode,
        not the lowpass. the floor is always lowpass limited. */
     switch(res->limit_type){
     case 1: /* point stereo limited */
       if(ci->hi.managed)
         freq=ci->psy_g_param.coupling_pkHz[PACKETBLOBS-1]*1000.;
       else
         freq=ci->psy_g_param.coupling_pkHz[PACKETBLOBS/2]*1000.;
       if(freq>nyq)freq=nyq;
       break;
     case 2: /* LFE channel; lowpass at ~ 250Hz */
       freq=250;
       break;
     default:
       /* already set */
       break;
     }
     /* in the residue, we're constrained, physically, by partition
        boundaries.  We still lowpass 'wherever', but we have to round up
        here to next boundary, or the vorbis spec will round it *down* to
        previous boundary in encode/decode */
     if(ci->residue_type[number]==2){
       /* residue 2 bundles together multiple channels; used by stereo
          and surround.  Count the channels in use */
       /* Multiple maps/submaps can point to the same residue.  In the case
          of residue 2, they all better have the same number of
          channels/samples. */
       int j,k,ch=0;
       for(i=0;i<ci->maps&&ch==0;i++){
         vorbis_info_mapping0 *mi=(vorbis_info_mapping0 *)ci->map_param[i];
         for(j=0;j<mi->submaps && ch==0;j++)
           if(mi->residuesubmap[j]==number) /* we found a submap referencing theis residue backend */
             for(k=0;k<vi->channels;k++)
               if(mi->chmuxlist[k]==j) /* this channel belongs to the submap */
                 ch++;
       }
       r->end=(int)((freq/nyq*blocksize*ch)/r->grouping+.9)* /* round up only if we're well past */
         r->grouping;
       /* the blocksize and grouping may disagree at the end */
       if(r->end>blocksize*ch)r->end=blocksize*ch/r->grouping*r->grouping;
     }else{
       r->end=(int)((freq/nyq*blocksize)/r->grouping+.9)* /* round up only if we're well past */
         r->grouping;
       /* the blocksize and grouping may disagree at the end */
       if(r->end>blocksize)r->end=blocksize/r->grouping*r->grouping;
     }
     if(r->end==0)r->end=r->grouping; /* LFE channel */
   }
 }
 /* we assume two maps in this encoder */
 static void vorbis_encode_map_n_res_setup(vorbis_info *vi,double s,
                                           const vorbis_mapping_template *maps){
   codec_setup_info *ci=vi->codec_setup;
   int i,j,is=s,modes=2;
   const vorbis_info_mapping0 *map=maps[is].map;
   const vorbis_info_mode *mode=_mode_template;
   const vorbis_residue_template *res=maps[is].res;
   if(ci->blocksizes[0]==ci->blocksizes[1])modes=1;
   for(i=0;i<modes;i++){
     ci->map_param[i]=_ogg_calloc(1,sizeof(*map));
     ci->mode_param[i]=_ogg_calloc(1,sizeof(*mode));
     memcpy(ci->mode_param[i],mode+i,sizeof(*_mode_template));
     if(i>=ci->modes)ci->modes=i+1;
     ci->map_type[i]=0;
     memcpy(ci->map_param[i],map+i,sizeof(*map));
     if(i>=ci->maps)ci->maps=i+1;
     for(j=0;j<map[i].submaps;j++)
       vorbis_encode_residue_setup(vi,map[i].residuesubmap[j],i
                                   ,res+map[i].residuesubmap[j]);
   }
 }
 static double setting_to_approx_bitrate(vorbis_info *vi){
   codec_setup_info *ci=vi->codec_setup;
   highlevel_encode_setup *hi=&ci->hi;
   ve_setup_data_template *setup=(ve_setup_data_template *)hi->setup;
   int is=hi->base_setting;
   double ds=hi->base_setting-is;
   int ch=vi->channels;
   const double *r=setup->rate_mapping;
   if(r==NULL)
     return(-1);
   return((r[is]*(1.-ds)+r[is+1]*ds)*ch);
 }
 static const void *get_setup_template(long ch,long srate,
                                       double req,int q_or_bitrate,
                                       double *base_setting){
   int i=0,j;
   if(q_or_bitrate)req/=ch;
   while(setup_list[i]){
     if(setup_list[i]->coupling_restriction==-1 ||
        setup_list[i]->coupling_restriction==ch){
       if(srate>=setup_list[i]->samplerate_min_restriction &&
          srate<=setup_list[i]->samplerate_max_restriction){
         int mappings=setup_list[i]->mappings;
         const double *map=(q_or_bitrate?
                      setup_list[i]->rate_mapping:
                      setup_list[i]->quality_mapping);
         /* the template matches.  Does the requested quality mode
            fall within this template's modes? */
         if(req<map[0]){++i;continue;}
         if(req>map[setup_list[i]->mappings]){++i;continue;}
         for(j=0;j<mappings;j++)
           if(req>=map[j] && req<map[j+1])break;
         /* an all-points match */
         if(j==mappings)
           *base_setting=j-.001;
         else{
           float low=map[j];
           float high=map[j+1];
           float del=(req-low)/(high-low);
           *base_setting=j+del;
         }
         return(setup_list[i]);
       }
     }
     i++;
   }
   return NULL;
 }
 /* encoders will need to use vorbis_info_init beforehand and call
    vorbis_info clear when all done */
 /* two interfaces; this, more detailed one, and later a convenience
    layer on top */
 /* the final setup call */
 int vorbis_encode_setup_init(vorbis_info *vi){
   int i,i0=0,singleblock=0;
   codec_setup_info *ci=vi->codec_setup;
   ve_setup_data_template *setup=NULL;
   highlevel_encode_setup *hi=&ci->hi;
   if(ci==NULL)return(OV_EINVAL);
   if(!hi->impulse_block_p)i0=1;
   /* too low/high an ATH floater is nonsensical, but doesn't break anything */
   if(hi->ath_floating_dB>-80)hi->ath_floating_dB=-80;
   if(hi->ath_floating_dB<-200)hi->ath_floating_dB=-200;
   /* again, bound this to avoid the app shooting itself int he foot
      too badly */
   if(hi->amplitude_track_dBpersec>0.)hi->amplitude_track_dBpersec=0.;
   if(hi->amplitude_track_dBpersec<-99999.)hi->amplitude_track_dBpersec=-99999.;
   /* get the appropriate setup template; matches the fetch in previous
      stages */
   setup=(ve_setup_data_template *)hi->setup;
   if(setup==NULL)return(OV_EINVAL);
   hi->set_in_stone=1;
   /* choose block sizes from configured sizes as well as paying
      attention to long_block_p and short_block_p.  If the configured
      short and long blocks are the same length, we set long_block_p
      and unset short_block_p */
   vorbis_encode_blocksize_setup(vi,hi->base_setting,
                                 setup->blocksize_short,
                                 setup->blocksize_long);
   if(ci->blocksizes[0]==ci->blocksizes[1])singleblock=1;
   /* floor setup; choose proper floor params.  Allocated on the floor
      stack in order; if we alloc only a single long floor, it's 0 */
   for(i=0;i<setup->floor_mappings;i++)
     vorbis_encode_floor_setup(vi,hi->base_setting,
                               setup->floor_books,
                               setup->floor_params,
                               setup->floor_mapping_list[i]);
   /* setup of [mostly] short block detection and stereo*/
   vorbis_encode_global_psych_setup(vi,hi->trigger_setting,
                                    setup->global_params,
                                    setup->global_mapping);
   vorbis_encode_global_stereo(vi,hi,setup->stereo_modes);
   /* basic psych setup and noise normalization */
   vorbis_encode_psyset_setup(vi,hi->base_setting,
                              setup->psy_noise_normal_start[0],
                              setup->psy_noise_normal_partition[0],
                              setup->psy_noise_normal_thresh,
 );
   vorbis_encode_psyset_setup(vi,hi->base_setting,
                              setup->psy_noise_normal_start[0],
                              setup->psy_noise_normal_partition[0],
                              setup->psy_noise_normal_thresh,
 );
   if(!singleblock){
     vorbis_encode_psyset_setup(vi,hi->base_setting,
                                setup->psy_noise_normal_start[1],
                                setup->psy_noise_normal_partition[1],
                                     setup->psy_noise_normal_thresh,
 );
     vorbis_encode_psyset_setup(vi,hi->base_setting,
                                setup->psy_noise_normal_start[1],
                                setup->psy_noise_normal_partition[1],
                                setup->psy_noise_normal_thresh,
 );
   }
   /* tone masking setup */
   vorbis_encode_tonemask_setup(vi,hi->block[i0].tone_mask_setting,0,
                                setup->psy_tone_masteratt,
                                setup->psy_tone_0dB,
                                setup->psy_tone_adj_impulse);
   vorbis_encode_tonemask_setup(vi,hi->block[1].tone_mask_setting,1,
                                setup->psy_tone_masteratt,
                                setup->psy_tone_0dB,
                                setup->psy_tone_adj_other);
   if(!singleblock){
     vorbis_encode_tonemask_setup(vi,hi->block[2].tone_mask_setting,2,
                                  setup->psy_tone_masteratt,
                                  setup->psy_tone_0dB,
                                  setup->psy_tone_adj_other);
     vorbis_encode_tonemask_setup(vi,hi->block[3].tone_mask_setting,3,
                                  setup->psy_tone_masteratt,
                                  setup->psy_tone_0dB,
                                  setup->psy_tone_adj_long);
   }
   /* noise companding setup */
   vorbis_encode_compand_setup(vi,hi->block[i0].noise_compand_setting,0,
                               setup->psy_noise_compand,
                               setup->psy_noise_compand_short_mapping);
   vorbis_encode_compand_setup(vi,hi->block[1].noise_compand_setting,1,
                               setup->psy_noise_compand,
                               setup->psy_noise_compand_short_mapping);
   if(!singleblock){
     vorbis_encode_compand_setup(vi,hi->block[2].noise_compand_setting,2,
                                 setup->psy_noise_compand,
                                 setup->psy_noise_compand_long_mapping);
     vorbis_encode_compand_setup(vi,hi->block[3].noise_compand_setting,3,
                                 setup->psy_noise_compand,
                                 setup->psy_noise_compand_long_mapping);
   }
   /* peak guarding setup  */
   vorbis_encode_peak_setup(vi,hi->block[i0].tone_peaklimit_setting,0,
                            setup->psy_tone_dBsuppress);
   vorbis_encode_peak_setup(vi,hi->block[1].tone_peaklimit_setting,1,
                            setup->psy_tone_dBsuppress);
   if(!singleblock){
     vorbis_encode_peak_setup(vi,hi->block[2].tone_peaklimit_setting,2,
                              setup->psy_tone_dBsuppress);
     vorbis_encode_peak_setup(vi,hi->block[3].tone_peaklimit_setting,3,
                              setup->psy_tone_dBsuppress);
   }
   /* noise bias setup */
   vorbis_encode_noisebias_setup(vi,hi->block[i0].noise_bias_setting,0,
                                 setup->psy_noise_dBsuppress,
                                 setup->psy_noise_bias_impulse,
                                 setup->psy_noiseguards,
                                 (i0==0?hi->impulse_noisetune:0.));
   vorbis_encode_noisebias_setup(vi,hi->block[1].noise_bias_setting,1,
                                 setup->psy_noise_dBsuppress,
                                 setup->psy_noise_bias_padding,
                                 setup->psy_noiseguards,0.);
   if(!singleblock){
     vorbis_encode_noisebias_setup(vi,hi->block[2].noise_bias_setting,2,
                                   setup->psy_noise_dBsuppress,
                                   setup->psy_noise_bias_trans,
                                   setup->psy_noiseguards,0.);
     vorbis_encode_noisebias_setup(vi,hi->block[3].noise_bias_setting,3,
                                   setup->psy_noise_dBsuppress,
                                   setup->psy_noise_bias_long,
                                   setup->psy_noiseguards,0.);
   }
   vorbis_encode_ath_setup(vi,0);
   vorbis_encode_ath_setup(vi,1);
   if(!singleblock){
     vorbis_encode_ath_setup(vi,2);
     vorbis_encode_ath_setup(vi,3);
   }
   vorbis_encode_map_n_res_setup(vi,hi->base_setting,setup->maps);
   /* set bitrate readonlies and management */
   if(hi->bitrate_av>0)
     vi->bitrate_nominal=hi->bitrate_av;
   else{
     vi->bitrate_nominal=setting_to_approx_bitrate(vi);
   }
   vi->bitrate_lower=hi->bitrate_min;
   vi->bitrate_upper=hi->bitrate_max;
   if(hi->bitrate_av)
     vi->bitrate_window=(double)hi->bitrate_reservoir/hi->bitrate_av;
   else
     vi->bitrate_window=0.;
   if(hi->managed){
     ci->bi.avg_rate=hi->bitrate_av;
     ci->bi.min_rate=hi->bitrate_min;
     ci->bi.max_rate=hi->bitrate_max;
     ci->bi.reservoir_bits=hi->bitrate_reservoir;
     ci->bi.reservoir_bias=
       hi->bitrate_reservoir_bias;
     ci->bi.slew_damp=hi->bitrate_av_damp;
   }
   return(0);
 }
 static void vorbis_encode_setup_setting(vorbis_info *vi,
                                        long  channels,
                                        long  rate){
   int i,is;
   codec_setup_info *ci=vi->codec_setup;
   highlevel_encode_setup *hi=&ci->hi;
   const ve_setup_data_template *setup=hi->setup;
   double ds;
   vi->version=0;
   vi->channels=channels;
   vi->rate=rate;
   hi->impulse_block_p=1;
   hi->noise_normalize_p=1;
   is=hi->base_setting;
   ds=hi->base_setting-is;
   hi->stereo_point_setting=hi->base_setting;
   if(!hi->lowpass_altered)
     hi->lowpass_kHz=
       setup->psy_lowpass[is]*(1.-ds)+setup->psy_lowpass[is+1]*ds;
   hi->ath_floating_dB=setup->psy_ath_float[is]*(1.-ds)+
     setup->psy_ath_float[is+1]*ds;
   hi->ath_absolute_dB=setup->psy_ath_abs[is]*(1.-ds)+
     setup->psy_ath_abs[is+1]*ds;
   hi->amplitude_track_dBpersec=-6.;
   hi->trigger_setting=hi->base_setting;
   for(i=0;i<4;i++){
     hi->block[i].tone_mask_setting=hi->base_setting;
     hi->block[i].tone_peaklimit_setting=hi->base_setting;
     hi->block[i].noise_bias_setting=hi->base_setting;
     hi->block[i].noise_compand_setting=hi->base_setting;
   }
 }
 int vorbis_encode_setup_vbr(vorbis_info *vi,
                             long  channels,
                             long  rate,
                             float quality){
   codec_setup_info *ci=vi->codec_setup;
   highlevel_encode_setup *hi=&ci->hi;
   quality+=.0000001;
   if(quality>=1.)quality=.9999;
   hi->req=quality;
   hi->setup=get_setup_template(channels,rate,quality,0,&hi->base_setting);
   if(!hi->setup)return OV_EIMPL;
   vorbis_encode_setup_setting(vi,channels,rate);
   hi->managed=0;
   hi->coupling_p=1;
   return 0;
 }
 int vorbis_encode_init_vbr(vorbis_info *vi,
                            long channels,
                            long rate,
                            float base_quality /* 0. to 1. */
                            ){
   int ret=0;
   ret=vorbis_encode_setup_vbr(vi,channels,rate,base_quality);
   if(ret){
     vorbis_info_clear(vi);
     return ret;
   }
   ret=vorbis_encode_setup_init(vi);
   if(ret)
     vorbis_info_clear(vi);
   return(ret);
 }
 int vorbis_encode_setup_managed(vorbis_info *vi,
                                 long channels,
                                 long rate,
                                 long max_bitrate,
                                 long nominal_bitrate,
                                 long min_bitrate){
   codec_setup_info *ci=vi->codec_setup;
   highlevel_encode_setup *hi=&ci->hi;
   double tnominal=nominal_bitrate;
   if(nominal_bitrate<=0.){
     if(max_bitrate>0.){
       if(min_bitrate>0.)
         nominal_bitrate=(max_bitrate+min_bitrate)*.5;
       else
         nominal_bitrate=max_bitrate*.875;
     }else{
       if(min_bitrate>0.){
         nominal_bitrate=min_bitrate;
       }else{
         return(OV_EINVAL);
       }
     }
   }
   hi->req=nominal_bitrate;
   hi->setup=get_setup_template(channels,rate,nominal_bitrate,1,&hi->base_setting);
   if(!hi->setup)return OV_EIMPL;
   vorbis_encode_setup_setting(vi,channels,rate);
   /* initialize management with sane defaults */
   hi->coupling_p=1;
   hi->managed=1;
   hi->bitrate_min=min_bitrate;
   hi->bitrate_max=max_bitrate;
   hi->bitrate_av=tnominal;
   hi->bitrate_av_damp=1.5f; /* full range in no less than 1.5 second */
   hi->bitrate_reservoir=nominal_bitrate*2;
   hi->bitrate_reservoir_bias=.1; /* bias toward hoarding bits */
   return(0);
 }
 int vorbis_encode_init(vorbis_info *vi,
                        long channels,
                        long rate,
                        long max_bitrate,
                        long nominal_bitrate,
                        long min_bitrate){
   int ret=vorbis_encode_setup_managed(vi,channels,rate,
                                       max_bitrate,
                                       nominal_bitrate,
                                       min_bitrate);
   if(ret){
     vorbis_info_clear(vi);
     return(ret);
   }
   ret=vorbis_encode_setup_init(vi);
   if(ret)
     vorbis_info_clear(vi);
   return(ret);
 }
 int vorbis_encode_ctl(vorbis_info *vi,int number,void *arg){
   if(vi){
     codec_setup_info *ci=vi->codec_setup;
     highlevel_encode_setup *hi=&ci->hi;
     int setp=(number&0xf); /* a read request has a low nibble of 0 */
     if(setp && hi->set_in_stone)return(OV_EINVAL);
     switch(number){
     /* now deprecated *****************/
     case OV_ECTL_RATEMANAGE_GET:
       {
         struct ovectl_ratemanage_arg *ai=
           (struct ovectl_ratemanage_arg *)arg;
         ai->management_active=hi->managed;
         ai->bitrate_hard_window=ai->bitrate_av_window=
           (double)hi->bitrate_reservoir/vi->rate;
         ai->bitrate_av_window_center=1.;
         ai->bitrate_hard_min=hi->bitrate_min;
         ai->bitrate_hard_max=hi->bitrate_max;
         ai->bitrate_av_lo=hi->bitrate_av;
         ai->bitrate_av_hi=hi->bitrate_av;
       }
       return(0);
     /* now deprecated *****************/
     case OV_ECTL_RATEMANAGE_SET:
       {
         struct ovectl_ratemanage_arg *ai=
           (struct ovectl_ratemanage_arg *)arg;
         if(ai==NULL){
           hi->managed=0;
         }else{
           hi->managed=ai->management_active;
           vorbis_encode_ctl(vi,OV_ECTL_RATEMANAGE_AVG,arg);
           vorbis_encode_ctl(vi,OV_ECTL_RATEMANAGE_HARD,arg);
         }
       }
       return 0;
     /* now deprecated *****************/
     case OV_ECTL_RATEMANAGE_AVG:
       {
         struct ovectl_ratemanage_arg *ai=
           (struct ovectl_ratemanage_arg *)arg;
         if(ai==NULL){
           hi->bitrate_av=0;
         }else{
           hi->bitrate_av=(ai->bitrate_av_lo+ai->bitrate_av_hi)*.5;
         }
       }
       return(0);
     /* now deprecated *****************/
     case OV_ECTL_RATEMANAGE_HARD:
       {
         struct ovectl_ratemanage_arg *ai=
           (struct ovectl_ratemanage_arg *)arg;
         if(ai==NULL){
           hi->bitrate_min=0;
           hi->bitrate_max=0;
         }else{
           hi->bitrate_min=ai->bitrate_hard_min;
           hi->bitrate_max=ai->bitrate_hard_max;
           hi->bitrate_reservoir=ai->bitrate_hard_window*
             (hi->bitrate_max+hi->bitrate_min)*.5;
         }
         if(hi->bitrate_reservoir<128.)
           hi->bitrate_reservoir=128.;
       }
       return(0);
       /* replacement ratemanage interface */
     case OV_ECTL_RATEMANAGE2_GET:
       {
         struct ovectl_ratemanage2_arg *ai=
           (struct ovectl_ratemanage2_arg *)arg;
         if(ai==NULL)return OV_EINVAL;
         ai->management_active=hi->managed;
         ai->bitrate_limit_min_kbps=hi->bitrate_min/1000;
         ai->bitrate_limit_max_kbps=hi->bitrate_max/1000;
         ai->bitrate_average_kbps=hi->bitrate_av/1000;
         ai->bitrate_average_damping=hi->bitrate_av_damp;
         ai->bitrate_limit_reservoir_bits=hi->bitrate_reservoir;
         ai->bitrate_limit_reservoir_bias=hi->bitrate_reservoir_bias;
       }
       return (0);
     case OV_ECTL_RATEMANAGE2_SET:
       {
         struct ovectl_ratemanage2_arg *ai=
           (struct ovectl_ratemanage2_arg *)arg;
         if(ai==NULL){
           hi->managed=0;
         }else{
           /* sanity check; only catch invariant violations */
           if(ai->bitrate_limit_min_kbps>0 &&
              ai->bitrate_average_kbps>0 &&
              ai->bitrate_limit_min_kbps>ai->bitrate_average_kbps)
             return OV_EINVAL;
           if(ai->bitrate_limit_max_kbps>0 &&
              ai->bitrate_average_kbps>0 &&
              ai->bitrate_limit_max_kbps<ai->bitrate_average_kbps)
             return OV_EINVAL;
           if(ai->bitrate_limit_min_kbps>0 &&
              ai->bitrate_limit_max_kbps>0 &&
              ai->bitrate_limit_min_kbps>ai->bitrate_limit_max_kbps)
             return OV_EINVAL;
           if(ai->bitrate_average_damping <= 0.)
             return OV_EINVAL;
           if(ai->bitrate_limit_reservoir_bits < 0)
             return OV_EINVAL;
           if(ai->bitrate_limit_reservoir_bias < 0.)
             return OV_EINVAL;
           if(ai->bitrate_limit_reservoir_bias > 1.)
             return OV_EINVAL;
           hi->managed=ai->management_active;
           hi->bitrate_min=ai->bitrate_limit_min_kbps * 1000;
           hi->bitrate_max=ai->bitrate_limit_max_kbps * 1000;
           hi->bitrate_av=ai->bitrate_average_kbps * 1000;
           hi->bitrate_av_damp=ai->bitrate_average_damping;
           hi->bitrate_reservoir=ai->bitrate_limit_reservoir_bits;
           hi->bitrate_reservoir_bias=ai->bitrate_limit_reservoir_bias;
         }
       }
       return 0;
     case OV_ECTL_LOWPASS_GET:
       {
         double *farg=(double *)arg;
         *farg=hi->lowpass_kHz;
       }
       return(0);
     case OV_ECTL_LOWPASS_SET:
       {
         double *farg=(double *)arg;
         hi->lowpass_kHz=*farg;
         if(hi->lowpass_kHz<2.)hi->lowpass_kHz=2.;
         if(hi->lowpass_kHz>99.)hi->lowpass_kHz=99.;
         hi->lowpass_altered=1;
       }
       return(0);
     case OV_ECTL_IBLOCK_GET:
       {
         double *farg=(double *)arg;
         *farg=hi->impulse_noisetune;
       }
       return(0);
     case OV_ECTL_IBLOCK_SET:
       {
         double *farg=(double *)arg;
         hi->impulse_noisetune=*farg;
         if(hi->impulse_noisetune>0.)hi->impulse_noisetune=0.;
         if(hi->impulse_noisetune<-15.)hi->impulse_noisetune=-15.;
       }
       return(0);
     case OV_ECTL_COUPLING_GET:
       {
         int *iarg=(int *)arg;
         *iarg=hi->coupling_p;
       }
       return(0);
     case OV_ECTL_COUPLING_SET:
       {
         const void *new_template;
         double new_base=0.;
         int *iarg=(int *)arg;
         hi->coupling_p=((*iarg)!=0);
         /* Fetching a new template can alter the base_setting, which
            many other parameters are based on.  Right now, the only
            parameter drawn from the base_setting that can be altered
            by an encctl is the lowpass, so that is explictly flagged
            to not be overwritten when we fetch a new template and
            recompute the dependant settings */
         new_template = get_setup_template(hi->coupling_p?vi->channels:-1,
                                           vi->rate,
                                           hi->req,
                                           hi->managed,
                                           &new_base);
         if(!hi->setup)return OV_EIMPL;
         hi->setup=new_template;
         hi->base_setting=new_base;
         vorbis_encode_setup_setting(vi,vi->channels,vi->rate);
       }
       return(0);
     }
     return(OV_EIMPL);
   }
   return(OV_EINVAL);
 }

The Tor Browser / annotate

media/libvorbis/lib/vorbisenc.c@97036ab72558 (annotated)

media/libvorbis/lib/vorbisenc.c