LCOV - app.info - media/libvorbis/lib/vorbis_mapping0.c

LCOV - code coverage report
| Current view: | directory - media/libvorbis/lib - vorbis_mapping0.c (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 244 | 0 | 0.0 %
| Date: | 2012-04-21 | Functions: | 6 | 0 | 0.0 %

           1                 : /********************************************************************
           2                 :  *                                                                  *
           3                 :  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
           4                 :  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
           5                 :  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
           6                 :  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
           7                 :  *                                                                  *
           8                 :  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010             *
           9                 :  * by the Xiph.Org Foundation http://www.xiph.org/                  *
          10                 :  *                                                                  *
          11                 :  ********************************************************************
          12                 :
          13                 :  function: channel mapping 0 implementation
          14                 :  last mod: $Id: mapping0.c 17022 2010-03-25 03:45:42Z xiphmont $
          15                 :
          16                 :  ********************************************************************/
          17                 :
          18                 : #include <stdlib.h>
          19                 : #include <stdio.h>
          20                 : #include <string.h>
          21                 : #include <math.h>
          22                 : #include <ogg/ogg.h>
          23                 : #include "vorbis/codec.h"
          24                 : #include "codec_internal.h"
          25                 : #include "codebook.h"
          26                 : #include "window.h"
          27                 : #include "registry.h"
          28                 : #include "psy.h"
          29                 : #include "misc.h"
          30                 :
          31                 : /* simplistic, wasteful way of doing this (unique lookup for each
          32                 :    mode/submapping); there should be a central repository for
          33                 :    identical lookups.  That will require minor work, so I'm putting it
          34                 :    off as low priority.
          35                 :
          36                 :    Why a lookup for each backend in a given mode?  Because the
          37                 :    blocksize is set by the mode, and low backend lookups may require
          38                 :    parameters from other areas of the mode/mapping */
          39                 :
          40               0 : static void mapping0_free_info(vorbis_info_mapping *i){
          41               0 :   vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i;
          42               0 :   if(info){
          43               0 :     memset(info,0,sizeof(*info));
          44               0 :     _ogg_free(info);
          45                 :   }
          46               0 : }
          47                 :
          48               0 : static int ilog(unsigned int v){
          49               0 :   int ret=0;
          50               0 :   if(v)--v;
          51               0 :   while(v){
          52               0 :     ret++;
          53               0 :     v>>=1;
          54                 :   }
          55               0 :   return(ret);
          56                 : }
          57                 :
          58               0 : static void mapping0_pack(vorbis_info *vi,vorbis_info_mapping *vm,
          59                 :                           oggpack_buffer *opb){
          60                 :   int i;
          61               0 :   vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm;
          62                 :
          63                 :   /* another 'we meant to do it this way' hack...  up to beta 4, we
          64                 :      packed 4 binary zeros here to signify one submapping in use.  We
          65                 :      now redefine that to mean four bitflags that indicate use of
          66                 :      deeper features; bit0:submappings, bit1:coupling,
          67                 :      bit2,3:reserved. This is backward compatable with all actual uses
          68                 :      of the beta code. */
          69                 :
          70               0 :   if(info->submaps>1){
          71               0 :     oggpack_write(opb,1,1);
          72               0 :     oggpack_write(opb,info->submaps-1,4);
          73                 :   }else
          74               0 :     oggpack_write(opb,0,1);
          75                 :
          76               0 :   if(info->coupling_steps>0){
          77               0 :     oggpack_write(opb,1,1);
          78               0 :     oggpack_write(opb,info->coupling_steps-1,8);
          79                 :
          80               0 :     for(i=0;i<info->coupling_steps;i++){
          81               0 :       oggpack_write(opb,info->coupling_mag[i],ilog(vi->channels));
          82               0 :       oggpack_write(opb,info->coupling_ang[i],ilog(vi->channels));
          83                 :     }
          84                 :   }else
          85               0 :     oggpack_write(opb,0,1);
          86                 :
          87               0 :   oggpack_write(opb,0,2); /* 2,3:reserved */
          88                 :
          89                 :   /* we don't write the channel submappings if we only have one... */
          90               0 :   if(info->submaps>1){
          91               0 :     for(i=0;i<vi->channels;i++)
          92               0 :       oggpack_write(opb,info->chmuxlist[i],4);
          93                 :   }
          94               0 :   for(i=0;i<info->submaps;i++){
          95               0 :     oggpack_write(opb,0,8); /* time submap unused */
          96               0 :     oggpack_write(opb,info->floorsubmap[i],8);
          97               0 :     oggpack_write(opb,info->residuesubmap[i],8);
          98                 :   }
          99               0 : }
         100                 :
         101                 : /* also responsible for range checking */
         102               0 : static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
         103                 :   int i,b;
         104               0 :   vorbis_info_mapping0 *info=_ogg_calloc(1,sizeof(*info));
         105               0 :   codec_setup_info     *ci=vi->codec_setup;
         106               0 :   memset(info,0,sizeof(*info));
         107                 :
         108               0 :   b=oggpack_read(opb,1);
         109               0 :   if(b<0)goto err_out;
         110               0 :   if(b){
         111               0 :     info->submaps=oggpack_read(opb,4)+1;
         112               0 :     if(info->submaps<=0)goto err_out;
         113                 :   }else
         114               0 :     info->submaps=1;
         115                 :
         116               0 :   b=oggpack_read(opb,1);
         117               0 :   if(b<0)goto err_out;
         118               0 :   if(b){
         119               0 :     info->coupling_steps=oggpack_read(opb,8)+1;
         120               0 :     if(info->coupling_steps<=0)goto err_out;
         121               0 :     for(i=0;i<info->coupling_steps;i++){
         122               0 :       int testM=info->coupling_mag[i]=oggpack_read(opb,ilog(vi->channels));
         123               0 :       int testA=info->coupling_ang[i]=oggpack_read(opb,ilog(vi->channels));
         124                 :
         125               0 :       if(testM<0 ||
         126               0 :          testA<0 ||
         127               0 :          testM==testA ||
         128               0 :          testM>=vi->channels ||
         129               0 :          testA>=vi->channels) goto err_out;
         130                 :     }
         131                 :
         132                 :   }
         133                 :
         134               0 :   if(oggpack_read(opb,2)!=0)goto err_out; /* 2,3:reserved */
         135                 :
         136               0 :   if(info->submaps>1){
         137               0 :     for(i=0;i<vi->channels;i++){
         138               0 :       info->chmuxlist[i]=oggpack_read(opb,4);
         139               0 :       if(info->chmuxlist[i]>=info->submaps || info->chmuxlist[i]<0)goto err_out;
         140                 :     }
         141                 :   }
         142               0 :   for(i=0;i<info->submaps;i++){
         143               0 :     oggpack_read(opb,8); /* time submap unused */
         144               0 :     info->floorsubmap[i]=oggpack_read(opb,8);
         145               0 :     if(info->floorsubmap[i]>=ci->floors || info->floorsubmap[i]<0)goto err_out;
         146               0 :     info->residuesubmap[i]=oggpack_read(opb,8);
         147               0 :     if(info->residuesubmap[i]>=ci->residues || info->residuesubmap[i]<0)goto err_out;
         148                 :   }
         149                 :
         150               0 :   return info;
         151                 :
         152                 :  err_out:
         153               0 :   mapping0_free_info(info);
         154               0 :   return(NULL);
         155                 : }
         156                 :
         157                 : #include "os.h"
         158                 : #include "lpc.h"
         159                 : #include "lsp.h"
         160                 : #include "envelope.h"
         161                 : #include "mdct.h"
         162                 : #include "psy.h"
         163                 : #include "scales.h"
         164                 :
         165                 : #if 0
         166                 : static long seq=0;
         167                 : static ogg_int64_t total=0;
         168                 : static float FLOOR1_fromdB_LOOKUP[256]={
         169                 :   1.0649863e-07F, 1.1341951e-07F, 1.2079015e-07F, 1.2863978e-07F,
         170                 :   1.3699951e-07F, 1.4590251e-07F, 1.5538408e-07F, 1.6548181e-07F,
         171                 :   1.7623575e-07F, 1.8768855e-07F, 1.9988561e-07F, 2.128753e-07F,
         172                 :   2.2670913e-07F, 2.4144197e-07F, 2.5713223e-07F, 2.7384213e-07F,
         173                 :   2.9163793e-07F, 3.1059021e-07F, 3.3077411e-07F, 3.5226968e-07F,
         174                 :   3.7516214e-07F, 3.9954229e-07F, 4.2550680e-07F, 4.5315863e-07F,
         175                 :   4.8260743e-07F, 5.1396998e-07F, 5.4737065e-07F, 5.8294187e-07F,
         176                 :   6.2082472e-07F, 6.6116941e-07F, 7.0413592e-07F, 7.4989464e-07F,
         177                 :   7.9862701e-07F, 8.5052630e-07F, 9.0579828e-07F, 9.6466216e-07F,
         178                 :   1.0273513e-06F, 1.0941144e-06F, 1.1652161e-06F, 1.2409384e-06F,
         179                 :   1.3215816e-06F, 1.4074654e-06F, 1.4989305e-06F, 1.5963394e-06F,
         180                 :   1.7000785e-06F, 1.8105592e-06F, 1.9282195e-06F, 2.0535261e-06F,
         181                 :   2.1869758e-06F, 2.3290978e-06F, 2.4804557e-06F, 2.6416497e-06F,
         182                 :   2.8133190e-06F, 2.9961443e-06F, 3.1908506e-06F, 3.3982101e-06F,
         183                 :   3.6190449e-06F, 3.8542308e-06F, 4.1047004e-06F, 4.3714470e-06F,
         184                 :   4.6555282e-06F, 4.9580707e-06F, 5.2802740e-06F, 5.6234160e-06F,
         185                 :   5.9888572e-06F, 6.3780469e-06F, 6.7925283e-06F, 7.2339451e-06F,
         186                 :   7.7040476e-06F, 8.2047000e-06F, 8.7378876e-06F, 9.3057248e-06F,
         187                 :   9.9104632e-06F, 1.0554501e-05F, 1.1240392e-05F, 1.1970856e-05F,
         188                 :   1.2748789e-05F, 1.3577278e-05F, 1.4459606e-05F, 1.5399272e-05F,
         189                 :   1.6400004e-05F, 1.7465768e-05F, 1.8600792e-05F, 1.9809576e-05F,
         190                 :   2.1096914e-05F, 2.2467911e-05F, 2.3928002e-05F, 2.5482978e-05F,
         191                 :   2.7139006e-05F, 2.8902651e-05F, 3.0780908e-05F, 3.2781225e-05F,
         192                 :   3.4911534e-05F, 3.7180282e-05F, 3.9596466e-05F, 4.2169667e-05F,
         193                 :   4.4910090e-05F, 4.7828601e-05F, 5.0936773e-05F, 5.4246931e-05F,
         194                 :   5.7772202e-05F, 6.1526565e-05F, 6.5524908e-05F, 6.9783085e-05F,
         195                 :   7.4317983e-05F, 7.9147585e-05F, 8.4291040e-05F, 8.9768747e-05F,
         196                 :   9.5602426e-05F, 0.00010181521F, 0.00010843174F, 0.00011547824F,
         197                 :   0.00012298267F, 0.00013097477F, 0.00013948625F, 0.00014855085F,
         198                 :   0.00015820453F, 0.00016848555F, 0.00017943469F, 0.00019109536F,
         199                 :   0.00020351382F, 0.00021673929F, 0.00023082423F, 0.00024582449F,
         200                 :   0.00026179955F, 0.00027881276F, 0.00029693158F, 0.00031622787F,
         201                 :   0.00033677814F, 0.00035866388F, 0.00038197188F, 0.00040679456F,
         202                 :   0.00043323036F, 0.00046138411F, 0.00049136745F, 0.00052329927F,
         203                 :   0.00055730621F, 0.00059352311F, 0.00063209358F, 0.00067317058F,
         204                 :   0.00071691700F, 0.00076350630F, 0.00081312324F, 0.00086596457F,
         205                 :   0.00092223983F, 0.00098217216F, 0.0010459992F, 0.0011139742F,
         206                 :   0.0011863665F, 0.0012634633F, 0.0013455702F, 0.0014330129F,
         207                 :   0.0015261382F, 0.0016253153F, 0.0017309374F, 0.0018434235F,
         208                 :   0.0019632195F, 0.0020908006F, 0.0022266726F, 0.0023713743F,
         209                 :   0.0025254795F, 0.0026895994F, 0.0028643847F, 0.0030505286F,
         210                 :   0.0032487691F, 0.0034598925F, 0.0036847358F, 0.0039241906F,
         211                 :   0.0041792066F, 0.0044507950F, 0.0047400328F, 0.0050480668F,
         212                 :   0.0053761186F, 0.0057254891F, 0.0060975636F, 0.0064938176F,
         213                 :   0.0069158225F, 0.0073652516F, 0.0078438871F, 0.0083536271F,
         214                 :   0.0088964928F, 0.009474637F, 0.010090352F, 0.010746080F,
         215                 :   0.011444421F, 0.012188144F, 0.012980198F, 0.013823725F,
         216                 :   0.014722068F, 0.015678791F, 0.016697687F, 0.017782797F,
         217                 :   0.018938423F, 0.020169149F, 0.021479854F, 0.022875735F,
         218                 :   0.024362330F, 0.025945531F, 0.027631618F, 0.029427276F,
         219                 :   0.031339626F, 0.033376252F, 0.035545228F, 0.037855157F,
         220                 :   0.040315199F, 0.042935108F, 0.045725273F, 0.048696758F,
         221                 :   0.051861348F, 0.055231591F, 0.058820850F, 0.062643361F,
         222                 :   0.066714279F, 0.071049749F, 0.075666962F, 0.080584227F,
         223                 :   0.085821044F, 0.091398179F, 0.097337747F, 0.10366330F,
         224                 :   0.11039993F, 0.11757434F, 0.12521498F, 0.13335215F,
         225                 :   0.14201813F, 0.15124727F, 0.16107617F, 0.17154380F,
         226                 :   0.18269168F, 0.19456402F, 0.20720788F, 0.22067342F,
         227                 :   0.23501402F, 0.25028656F, 0.26655159F, 0.28387361F,
         228                 :   0.30232132F, 0.32196786F, 0.34289114F, 0.36517414F,
         229                 :   0.38890521F, 0.41417847F, 0.44109412F, 0.46975890F,
         230                 :   0.50028648F, 0.53279791F, 0.56742212F, 0.60429640F,
         231                 :   0.64356699F, 0.68538959F, 0.72993007F, 0.77736504F,
         232                 :   0.82788260F, 0.88168307F, 0.9389798F, 1.F,
         233                 : };
         234                 :
         235                 : #endif
         236                 :
         237                 :
         238               0 : static int mapping0_forward(vorbis_block *vb){
         239               0 :   vorbis_dsp_state      *vd=vb->vd;
         240               0 :   vorbis_info           *vi=vd->vi;
         241               0 :   codec_setup_info      *ci=vi->codec_setup;
         242               0 :   private_state         *b=vb->vd->backend_state;
         243               0 :   vorbis_block_internal *vbi=(vorbis_block_internal *)vb->internal;
         244               0 :   int                    n=vb->pcmend;
         245                 :   int i,j,k;
         246                 :
         247               0 :   int    *nonzero    = alloca(sizeof(*nonzero)*vi->channels);
         248               0 :   float  **gmdct     = _vorbis_block_alloc(vb,vi->channels*sizeof(*gmdct));
         249               0 :   int    **iwork      = _vorbis_block_alloc(vb,vi->channels*sizeof(*iwork));
         250               0 :   int ***floor_posts = _vorbis_block_alloc(vb,vi->channels*sizeof(*floor_posts));
         251                 :
         252               0 :   float global_ampmax=vbi->ampmax;
         253               0 :   float *local_ampmax=alloca(sizeof(*local_ampmax)*vi->channels);
         254               0 :   int blocktype=vbi->blocktype;
         255                 :
         256               0 :   int modenumber=vb->W;
         257               0 :   vorbis_info_mapping0 *info=ci->map_param[modenumber];
         258               0 :   vorbis_look_psy *psy_look=b->psy+blocktype+(vb->W?2:0);
         259                 :
         260               0 :   vb->mode=modenumber;
         261                 :
         262               0 :   for(i=0;i<vi->channels;i++){
         263               0 :     float scale=4.f/n;
         264                 :     float scale_dB;
         265                 :
         266               0 :     float *pcm     =vb->pcm[i];
         267               0 :     float *logfft  =pcm;
         268                 :
         269               0 :     iwork[i]=_vorbis_block_alloc(vb,n/2*sizeof(**iwork));
         270               0 :     gmdct[i]=_vorbis_block_alloc(vb,n/2*sizeof(**gmdct));
         271                 :
         272               0 :     scale_dB=todB(&scale) + .345; /* + .345 is a hack; the original
         273                 :                                      todB estimation used on IEEE 754
         274                 :                                      compliant machines had a bug that
         275                 :                                      returned dB values about a third
         276                 :                                      of a decibel too high.  The bug
         277                 :                                      was harmless because tunings
         278                 :                                      implicitly took that into
         279                 :                                      account.  However, fixing the bug
         280                 :                                      in the estimator requires
         281                 :                                      changing all the tunings as well.
         282                 :                                      For now, it's easier to sync
         283                 :                                      things back up here, and
         284                 :                                      recalibrate the tunings in the
         285                 :                                      next major model upgrade. */
         286                 :
         287                 : #if 0
         288                 :     if(vi->channels==2){
         289                 :       if(i==0)
         290                 :         _analysis_output("pcmL",seq,pcm,n,0,0,total-n/2);
         291                 :       else
         292                 :         _analysis_output("pcmR",seq,pcm,n,0,0,total-n/2);
         293                 :     }else{
         294                 :       _analysis_output("pcm",seq,pcm,n,0,0,total-n/2);
         295                 :     }
         296                 : #endif
         297                 :
         298                 :     /* window the PCM data */
         299               0 :     _vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
         300                 :
         301                 : #if 0
         302                 :     if(vi->channels==2){
         303                 :       if(i==0)
         304                 :         _analysis_output("windowedL",seq,pcm,n,0,0,total-n/2);
         305                 :       else
         306                 :         _analysis_output("windowedR",seq,pcm,n,0,0,total-n/2);
         307                 :     }else{
         308                 :       _analysis_output("windowed",seq,pcm,n,0,0,total-n/2);
         309                 :     }
         310                 : #endif
         311                 :
         312                 :     /* transform the PCM data */
         313                 :     /* only MDCT right now.... */
         314               0 :     mdct_forward(b->transform[vb->W][0],pcm,gmdct[i]);
         315                 :
         316                 :     /* FFT yields more accurate tonal estimation (not phase sensitive) */
         317               0 :     drft_forward(&b->fft_look[vb->W],pcm);
         318               0 :     logfft[0]=scale_dB+todB(pcm)  + .345; /* + .345 is a hack; the
         319                 :                                      original todB estimation used on
         320                 :                                      IEEE 754 compliant machines had a
         321                 :                                      bug that returned dB values about
         322                 :                                      a third of a decibel too high.
         323                 :                                      The bug was harmless because
         324                 :                                      tunings implicitly took that into
         325                 :                                      account.  However, fixing the bug
         326                 :                                      in the estimator requires
         327                 :                                      changing all the tunings as well.
         328                 :                                      For now, it's easier to sync
         329                 :                                      things back up here, and
         330                 :                                      recalibrate the tunings in the
         331                 :                                      next major model upgrade. */
         332               0 :     local_ampmax[i]=logfft[0];
         333               0 :     for(j=1;j<n-1;j+=2){
         334               0 :       float temp=pcm[j]*pcm[j]+pcm[j+1]*pcm[j+1];
         335               0 :       temp=logfft[(j+1)>>1]=scale_dB+.5f*todB(&temp)  + .345; /* +
         336                 :                                      .345 is a hack; the original todB
         337                 :                                      estimation used on IEEE 754
         338                 :                                      compliant machines had a bug that
         339                 :                                      returned dB values about a third
         340                 :                                      of a decibel too high.  The bug
         341                 :                                      was harmless because tunings
         342                 :                                      implicitly took that into
         343                 :                                      account.  However, fixing the bug
         344                 :                                      in the estimator requires
         345                 :                                      changing all the tunings as well.
         346                 :                                      For now, it's easier to sync
         347                 :                                      things back up here, and
         348                 :                                      recalibrate the tunings in the
         349                 :                                      next major model upgrade. */
         350               0 :       if(temp>local_ampmax[i])local_ampmax[i]=temp;
         351                 :     }
         352                 :
         353               0 :     if(local_ampmax[i]>0.f)local_ampmax[i]=0.f;
         354               0 :     if(local_ampmax[i]>global_ampmax)global_ampmax=local_ampmax[i];
         355                 :
         356                 : #if 0
         357                 :     if(vi->channels==2){
         358                 :       if(i==0){
         359                 :         _analysis_output("fftL",seq,logfft,n/2,1,0,0);
         360                 :       }else{
         361                 :         _analysis_output("fftR",seq,logfft,n/2,1,0,0);
         362                 :       }
         363                 :     }else{
         364                 :       _analysis_output("fft",seq,logfft,n/2,1,0,0);
         365                 :     }
         366                 : #endif
         367                 :
         368                 :   }
         369                 :
         370                 :   {
         371               0 :     float   *noise        = _vorbis_block_alloc(vb,n/2*sizeof(*noise));
         372               0 :     float   *tone         = _vorbis_block_alloc(vb,n/2*sizeof(*tone));
         373                 :
         374               0 :     for(i=0;i<vi->channels;i++){
         375                 :       /* the encoder setup assumes that all the modes used by any
         376                 :          specific bitrate tweaking use the same floor */
         377                 :
         378               0 :       int submap=info->chmuxlist[i];
         379                 :
         380                 :       /* the following makes things clearer to *me* anyway */
         381               0 :       float *mdct    =gmdct[i];
         382               0 :       float *logfft  =vb->pcm[i];
         383                 :
         384               0 :       float *logmdct =logfft+n/2;
         385               0 :       float *logmask =logfft;
         386                 :
         387               0 :       vb->mode=modenumber;
         388                 :
         389               0 :       floor_posts[i]=_vorbis_block_alloc(vb,PACKETBLOBS*sizeof(**floor_posts));
         390               0 :       memset(floor_posts[i],0,sizeof(**floor_posts)*PACKETBLOBS);
         391                 :
         392               0 :       for(j=0;j<n/2;j++)
         393               0 :         logmdct[j]=todB(mdct+j)  + .345; /* + .345 is a hack; the original
         394                 :                                      todB estimation used on IEEE 754
         395                 :                                      compliant machines had a bug that
         396                 :                                      returned dB values about a third
         397                 :                                      of a decibel too high.  The bug
         398                 :                                      was harmless because tunings
         399                 :                                      implicitly took that into
         400                 :                                      account.  However, fixing the bug
         401                 :                                      in the estimator requires
         402                 :                                      changing all the tunings as well.
         403                 :                                      For now, it's easier to sync
         404                 :                                      things back up here, and
         405                 :                                      recalibrate the tunings in the
         406                 :                                      next major model upgrade. */
         407                 :
         408                 : #if 0
         409                 :       if(vi->channels==2){
         410                 :         if(i==0)
         411                 :           _analysis_output("mdctL",seq,logmdct,n/2,1,0,0);
         412                 :         else
         413                 :           _analysis_output("mdctR",seq,logmdct,n/2,1,0,0);
         414                 :       }else{
         415                 :         _analysis_output("mdct",seq,logmdct,n/2,1,0,0);
         416                 :       }
         417                 : #endif
         418                 :
         419                 :       /* first step; noise masking.  Not only does 'noise masking'
         420                 :          give us curves from which we can decide how much resolution
         421                 :          to give noise parts of the spectrum, it also implicitly hands
         422                 :          us a tonality estimate (the larger the value in the
         423                 :          'noise_depth' vector, the more tonal that area is) */
         424                 :
         425               0 :       _vp_noisemask(psy_look,
         426                 :                     logmdct,
         427                 :                     noise); /* noise does not have by-frequency offset
         428                 :                                bias applied yet */
         429                 : #if 0
         430                 :       if(vi->channels==2){
         431                 :         if(i==0)
         432                 :           _analysis_output("noiseL",seq,noise,n/2,1,0,0);
         433                 :         else
         434                 :           _analysis_output("noiseR",seq,noise,n/2,1,0,0);
         435                 :       }else{
         436                 :         _analysis_output("noise",seq,noise,n/2,1,0,0);
         437                 :       }
         438                 : #endif
         439                 :
         440                 :       /* second step: 'all the other crap'; all the stuff that isn't
         441                 :          computed/fit for bitrate management goes in the second psy
         442                 :          vector.  This includes tone masking, peak limiting and ATH */
         443                 :
         444               0 :       _vp_tonemask(psy_look,
         445                 :                    logfft,
         446                 :                    tone,
         447                 :                    global_ampmax,
         448               0 :                    local_ampmax[i]);
         449                 :
         450                 : #if 0
         451                 :       if(vi->channels==2){
         452                 :         if(i==0)
         453                 :           _analysis_output("toneL",seq,tone,n/2,1,0,0);
         454                 :         else
         455                 :           _analysis_output("toneR",seq,tone,n/2,1,0,0);
         456                 :       }else{
         457                 :         _analysis_output("tone",seq,tone,n/2,1,0,0);
         458                 :       }
         459                 : #endif
         460                 :
         461                 :       /* third step; we offset the noise vectors, overlay tone
         462                 :          masking.  We then do a floor1-specific line fit.  If we're
         463                 :          performing bitrate management, the line fit is performed
         464                 :          multiple times for up/down tweakage on demand. */
         465                 :
         466                 : #if 0
         467                 :       {
         468                 :       float aotuv[psy_look->n];
         469                 : #endif
         470                 :
         471               0 :         _vp_offset_and_mix(psy_look,
         472                 :                            noise,
         473                 :                            tone,
         474                 :                            1,
         475                 :                            logmask,
         476                 :                            mdct,
         477                 :                            logmdct);
         478                 :
         479                 : #if 0
         480                 :         if(vi->channels==2){
         481                 :           if(i==0)
         482                 :             _analysis_output("aotuvM1_L",seq,aotuv,psy_look->n,1,1,0);
         483                 :           else
         484                 :             _analysis_output("aotuvM1_R",seq,aotuv,psy_look->n,1,1,0);
         485                 :         }else{
         486                 :           _analysis_output("aotuvM1",seq,aotuv,psy_look->n,1,1,0);
         487                 :         }
         488                 :       }
         489                 : #endif
         490                 :
         491                 :
         492                 : #if 0
         493                 :       if(vi->channels==2){
         494                 :         if(i==0)
         495                 :           _analysis_output("mask1L",seq,logmask,n/2,1,0,0);
         496                 :         else
         497                 :           _analysis_output("mask1R",seq,logmask,n/2,1,0,0);
         498                 :       }else{
         499                 :         _analysis_output("mask1",seq,logmask,n/2,1,0,0);
         500                 :       }
         501                 : #endif
         502                 :
         503                 :       /* this algorithm is hardwired to floor 1 for now; abort out if
         504                 :          we're *not* floor1.  This won't happen unless someone has
         505                 :          broken the encode setup lib.  Guard it anyway. */
         506               0 :       if(ci->floor_type[info->floorsubmap[submap]]!=1)return(-1);
         507                 :
         508               0 :       floor_posts[i][PACKETBLOBS/2]=
         509               0 :         floor1_fit(vb,b->flr[info->floorsubmap[submap]],
         510                 :                    logmdct,
         511                 :                    logmask);
         512                 :
         513                 :       /* are we managing bitrate?  If so, perform two more fits for
         514                 :          later rate tweaking (fits represent hi/lo) */
         515               0 :       if(vorbis_bitrate_managed(vb) && floor_posts[i][PACKETBLOBS/2]){
         516                 :         /* higher rate by way of lower noise curve */
         517                 :
         518               0 :         _vp_offset_and_mix(psy_look,
         519                 :                            noise,
         520                 :                            tone,
         521                 :                            2,
         522                 :                            logmask,
         523                 :                            mdct,
         524                 :                            logmdct);
         525                 :
         526                 : #if 0
         527                 :         if(vi->channels==2){
         528                 :           if(i==0)
         529                 :             _analysis_output("mask2L",seq,logmask,n/2,1,0,0);
         530                 :           else
         531                 :             _analysis_output("mask2R",seq,logmask,n/2,1,0,0);
         532                 :         }else{
         533                 :           _analysis_output("mask2",seq,logmask,n/2,1,0,0);
         534                 :         }
         535                 : #endif
         536                 :
         537               0 :         floor_posts[i][PACKETBLOBS-1]=
         538               0 :           floor1_fit(vb,b->flr[info->floorsubmap[submap]],
         539                 :                      logmdct,
         540                 :                      logmask);
         541                 :
         542                 :         /* lower rate by way of higher noise curve */
         543               0 :         _vp_offset_and_mix(psy_look,
         544                 :                            noise,
         545                 :                            tone,
         546                 :                            0,
         547                 :                            logmask,
         548                 :                            mdct,
         549                 :                            logmdct);
         550                 :
         551                 : #if 0
         552                 :         if(vi->channels==2){
         553                 :           if(i==0)
         554                 :             _analysis_output("mask0L",seq,logmask,n/2,1,0,0);
         555                 :           else
         556                 :             _analysis_output("mask0R",seq,logmask,n/2,1,0,0);
         557                 :         }else{
         558                 :           _analysis_output("mask0",seq,logmask,n/2,1,0,0);
         559                 :         }
         560                 : #endif
         561                 :
         562               0 :         floor_posts[i][0]=
         563               0 :           floor1_fit(vb,b->flr[info->floorsubmap[submap]],
         564                 :                      logmdct,
         565                 :                      logmask);
         566                 :
         567                 :         /* we also interpolate a range of intermediate curves for
         568                 :            intermediate rates */
         569               0 :         for(k=1;k<PACKETBLOBS/2;k++)
         570               0 :           floor_posts[i][k]=
         571               0 :             floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
         572               0 :                                    floor_posts[i][0],
         573               0 :                                    floor_posts[i][PACKETBLOBS/2],
         574               0 :                                    k*65536/(PACKETBLOBS/2));
         575               0 :         for(k=PACKETBLOBS/2+1;k<PACKETBLOBS-1;k++)
         576               0 :           floor_posts[i][k]=
         577               0 :             floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
         578               0 :                                    floor_posts[i][PACKETBLOBS/2],
         579               0 :                                    floor_posts[i][PACKETBLOBS-1],
         580               0 :                                    (k-PACKETBLOBS/2)*65536/(PACKETBLOBS/2));
         581                 :       }
         582                 :     }
         583                 :   }
         584               0 :   vbi->ampmax=global_ampmax;
         585                 :
         586                 :   /*
         587                 :     the next phases are performed once for vbr-only and PACKETBLOB
         588                 :     times for bitrate managed modes.
         589                 :
         590                 :     1) encode actual mode being used
         591                 :     2) encode the floor for each channel, compute coded mask curve/res
         592                 :     3) normalize and couple.
         593                 :     4) encode residue
         594                 :     5) save packet bytes to the packetblob vector
         595                 :
         596                 :   */
         597                 :
         598                 :   /* iterate over the many masking curve fits we've created */
         599                 :
         600                 :   {
         601               0 :     int **couple_bundle=alloca(sizeof(*couple_bundle)*vi->channels);
         602               0 :     int *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
         603                 :
         604               0 :     for(k=(vorbis_bitrate_managed(vb)?0:PACKETBLOBS/2);
         605               0 :         k<=(vorbis_bitrate_managed(vb)?PACKETBLOBS-1:PACKETBLOBS/2);
         606               0 :         k++){
         607               0 :       oggpack_buffer *opb=vbi->packetblob[k];
         608                 :
         609                 :       /* start out our new packet blob with packet type and mode */
         610                 :       /* Encode the packet type */
         611               0 :       oggpack_write(opb,0,1);
         612                 :       /* Encode the modenumber */
         613                 :       /* Encode frame mode, pre,post windowsize, then dispatch */
         614               0 :       oggpack_write(opb,modenumber,b->modebits);
         615               0 :       if(vb->W){
         616               0 :         oggpack_write(opb,vb->lW,1);
         617               0 :         oggpack_write(opb,vb->nW,1);
         618                 :       }
         619                 :
         620                 :       /* encode floor, compute masking curve, sep out residue */
         621               0 :       for(i=0;i<vi->channels;i++){
         622               0 :         int submap=info->chmuxlist[i];
         623               0 :         int *ilogmask=iwork[i];
         624                 :
         625               0 :         nonzero[i]=floor1_encode(opb,vb,b->flr[info->floorsubmap[submap]],
         626               0 :                                  floor_posts[i][k],
         627                 :                                  ilogmask);
         628                 : #if 0
         629                 :         {
         630                 :           char buf[80];
         631                 :           sprintf(buf,"maskI%c%d",i?'R':'L',k);
         632                 :           float work[n/2];
         633                 :           for(j=0;j<n/2;j++)
         634                 :             work[j]=FLOOR1_fromdB_LOOKUP[iwork[i][j]];
         635                 :           _analysis_output(buf,seq,work,n/2,1,1,0);
         636                 :         }
         637                 : #endif
         638                 :       }
         639                 :
         640                 :       /* our iteration is now based on masking curve, not prequant and
         641                 :          coupling.  Only one prequant/coupling step */
         642                 :
         643                 :       /* quantize/couple */
         644                 :       /* incomplete implementation that assumes the tree is all depth
         645                 :          one, or no tree at all */
         646               0 :       _vp_couple_quantize_normalize(k,
         647                 :                                     &ci->psy_g_param,
         648                 :                                     psy_look,
         649                 :                                     info,
         650                 :                                     gmdct,
         651                 :                                     iwork,
         652                 :                                     nonzero,
         653               0 :                                     ci->psy_g_param.sliding_lowpass[vb->W][k],
         654                 :                                     vi->channels);
         655                 :
         656                 : #if 0
         657                 :       for(i=0;i<vi->channels;i++){
         658                 :         char buf[80];
         659                 :         sprintf(buf,"res%c%d",i?'R':'L',k);
         660                 :         float work[n/2];
         661                 :         for(j=0;j<n/2;j++)
         662                 :           work[j]=iwork[i][j];
         663                 :         _analysis_output(buf,seq,work,n/2,1,0,0);
         664                 :       }
         665                 : #endif
         666                 :
         667                 :       /* classify and encode by submap */
         668               0 :       for(i=0;i<info->submaps;i++){
         669               0 :         int ch_in_bundle=0;
         670                 :         long **classifications;
         671               0 :         int resnum=info->residuesubmap[i];
         672                 :
         673               0 :         for(j=0;j<vi->channels;j++){
         674               0 :           if(info->chmuxlist[j]==i){
         675               0 :             zerobundle[ch_in_bundle]=0;
         676               0 :             if(nonzero[j])zerobundle[ch_in_bundle]=1;
         677               0 :             couple_bundle[ch_in_bundle++]=iwork[j];
         678                 :           }
         679                 :         }
         680                 :
         681               0 :         classifications=_residue_P[ci->residue_type[resnum]]->
         682               0 :           class(vb,b->residue[resnum],couple_bundle,zerobundle,ch_in_bundle);
         683                 :
         684               0 :         ch_in_bundle=0;
         685               0 :         for(j=0;j<vi->channels;j++)
         686               0 :           if(info->chmuxlist[j]==i)
         687               0 :             couple_bundle[ch_in_bundle++]=iwork[j];
         688                 :
         689               0 :         _residue_P[ci->residue_type[resnum]]->
         690               0 :           forward(opb,vb,b->residue[resnum],
         691                 :                   couple_bundle,zerobundle,ch_in_bundle,classifications,i);
         692                 :       }
         693                 :
         694                 :       /* ok, done encoding.  Next protopacket. */
         695                 :     }
         696                 :
         697                 :   }
         698                 :
         699                 : #if 0
         700                 :   seq++;
         701                 :   total+=ci->blocksizes[vb->W]/4+ci->blocksizes[vb->nW]/4;
         702                 : #endif
         703               0 :   return(0);
         704                 : }
         705                 :
         706               0 : static int mapping0_inverse(vorbis_block *vb,vorbis_info_mapping *l){
         707               0 :   vorbis_dsp_state     *vd=vb->vd;
         708               0 :   vorbis_info          *vi=vd->vi;
         709               0 :   codec_setup_info     *ci=vi->codec_setup;
         710               0 :   private_state        *b=vd->backend_state;
         711               0 :   vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)l;
         712                 :
         713                 :   int                   i,j;
         714               0 :   long                  n=vb->pcmend=ci->blocksizes[vb->W];
         715                 :
         716               0 :   float **pcmbundle=alloca(sizeof(*pcmbundle)*vi->channels);
         717               0 :   int    *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
         718                 :
         719               0 :   int   *nonzero  =alloca(sizeof(*nonzero)*vi->channels);
         720               0 :   void **floormemo=alloca(sizeof(*floormemo)*vi->channels);
         721                 :
         722                 :   /* recover the spectral envelope; store it in the PCM vector for now */
         723               0 :   for(i=0;i<vi->channels;i++){
         724               0 :     int submap=info->chmuxlist[i];
         725               0 :     floormemo[i]=_floor_P[ci->floor_type[info->floorsubmap[submap]]]->
         726               0 :       inverse1(vb,b->flr[info->floorsubmap[submap]]);
         727               0 :     if(floormemo[i])
         728               0 :       nonzero[i]=1;
         729                 :     else
         730               0 :       nonzero[i]=0;
         731               0 :     memset(vb->pcm[i],0,sizeof(*vb->pcm[i])*n/2);
         732                 :   }
         733                 :
         734                 :   /* channel coupling can 'dirty' the nonzero listing */
         735               0 :   for(i=0;i<info->coupling_steps;i++){
         736               0 :     if(nonzero[info->coupling_mag[i]] ||
         737               0 :        nonzero[info->coupling_ang[i]]){
         738               0 :       nonzero[info->coupling_mag[i]]=1;
         739               0 :       nonzero[info->coupling_ang[i]]=1;
         740                 :     }
         741                 :   }
         742                 :
         743                 :   /* recover the residue into our working vectors */
         744               0 :   for(i=0;i<info->submaps;i++){
         745               0 :     int ch_in_bundle=0;
         746               0 :     for(j=0;j<vi->channels;j++){
         747               0 :       if(info->chmuxlist[j]==i){
         748               0 :         if(nonzero[j])
         749               0 :           zerobundle[ch_in_bundle]=1;
         750                 :         else
         751               0 :           zerobundle[ch_in_bundle]=0;
         752               0 :         pcmbundle[ch_in_bundle++]=vb->pcm[j];
         753                 :       }
         754                 :     }
         755                 :
         756               0 :     _residue_P[ci->residue_type[info->residuesubmap[i]]]->
         757               0 :       inverse(vb,b->residue[info->residuesubmap[i]],
         758                 :               pcmbundle,zerobundle,ch_in_bundle);
         759                 :   }
         760                 :
         761                 :   /* channel coupling */
         762               0 :   for(i=info->coupling_steps-1;i>=0;i--){
         763               0 :     float *pcmM=vb->pcm[info->coupling_mag[i]];
         764               0 :     float *pcmA=vb->pcm[info->coupling_ang[i]];
         765                 :
         766               0 :     for(j=0;j<n/2;j++){
         767               0 :       float mag=pcmM[j];
         768               0 :       float ang=pcmA[j];
         769                 :
         770               0 :       if(mag>0)
         771               0 :         if(ang>0){
         772               0 :           pcmM[j]=mag;
         773               0 :           pcmA[j]=mag-ang;
         774                 :         }else{
         775               0 :           pcmA[j]=mag;
         776               0 :           pcmM[j]=mag+ang;
         777                 :         }
         778                 :       else
         779               0 :         if(ang>0){
         780               0 :           pcmM[j]=mag;
         781               0 :           pcmA[j]=mag+ang;
         782                 :         }else{
         783               0 :           pcmA[j]=mag;
         784               0 :           pcmM[j]=mag-ang;
         785                 :         }
         786                 :     }
         787                 :   }
         788                 :
         789                 :   /* compute and apply spectral envelope */
         790               0 :   for(i=0;i<vi->channels;i++){
         791               0 :     float *pcm=vb->pcm[i];
         792               0 :     int submap=info->chmuxlist[i];
         793               0 :     _floor_P[ci->floor_type[info->floorsubmap[submap]]]->
         794               0 :       inverse2(vb,b->flr[info->floorsubmap[submap]],
         795               0 :                floormemo[i],pcm);
         796                 :   }
         797                 :
         798                 :   /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
         799                 :   /* only MDCT right now.... */
         800               0 :   for(i=0;i<vi->channels;i++){
         801               0 :     float *pcm=vb->pcm[i];
         802               0 :     mdct_backward(b->transform[vb->W][0],pcm,pcm);
         803                 :   }
         804                 :
         805                 :   /* all done! */
         806               0 :   return(0);
         807                 : }
         808                 :
         809                 : /* export hooks */
         810                 : const vorbis_func_mapping mapping0_exportbundle={
         811                 :   &mapping0_pack,
         812                 :   &mapping0_unpack,
         813                 :   &mapping0_free_info,
         814                 :   &mapping0_forward,
         815                 :   &mapping0_inverse
         816                 : };

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