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annotate libs/vorbis/mapping0.c @ 1:e7ca128b8713

find changesets by author, revision, files, or words in the commit message
looks nice :)
author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 02 Feb 2014 00:35:22 +0200
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rev   line source
nuclear@0 1 /********************************************************************
nuclear@0 2 * *
nuclear@0 3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
nuclear@0 4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
nuclear@0 5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
nuclear@0 6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
nuclear@0 7 * *
nuclear@0 8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
nuclear@0 9 * by the Xiph.Org Foundation http://www.xiph.org/ *
nuclear@0 10 * *
nuclear@0 11 ********************************************************************
nuclear@0 12
nuclear@0 13 function: channel mapping 0 implementation
nuclear@0 14 last mod: $Id: mapping0.c 17022 2010-03-25 03:45:42Z xiphmont $
nuclear@0 15
nuclear@0 16 ********************************************************************/
nuclear@0 17
nuclear@0 18 #include <stdlib.h>
nuclear@0 19 #include <stdio.h>
nuclear@0 20 #include <string.h>
nuclear@0 21 #include <math.h>
nuclear@0 22 #include <ogg/ogg.h>
nuclear@0 23 #include "vorbis/codec.h"
nuclear@0 24 #include "codec_internal.h"
nuclear@0 25 #include "codebook.h"
nuclear@0 26 #include "window.h"
nuclear@0 27 #include "registry.h"
nuclear@0 28 #include "psy.h"
nuclear@0 29 #include "misc.h"
nuclear@0 30
nuclear@0 31 /* simplistic, wasteful way of doing this (unique lookup for each
nuclear@0 32 mode/submapping); there should be a central repository for
nuclear@0 33 identical lookups. That will require minor work, so I'm putting it
nuclear@0 34 off as low priority.
nuclear@0 35
nuclear@0 36 Why a lookup for each backend in a given mode? Because the
nuclear@0 37 blocksize is set by the mode, and low backend lookups may require
nuclear@0 38 parameters from other areas of the mode/mapping */
nuclear@0 39
nuclear@0 40 static void mapping0_free_info(vorbis_info_mapping *i){
nuclear@0 41 vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)i;
nuclear@0 42 if(info){
nuclear@0 43 memset(info,0,sizeof(*info));
nuclear@0 44 _ogg_free(info);
nuclear@0 45 }
nuclear@0 46 }
nuclear@0 47
nuclear@0 48 static int ilog(unsigned int v){
nuclear@0 49 int ret=0;
nuclear@0 50 if(v)--v;
nuclear@0 51 while(v){
nuclear@0 52 ret++;
nuclear@0 53 v>>=1;
nuclear@0 54 }
nuclear@0 55 return(ret);
nuclear@0 56 }
nuclear@0 57
nuclear@0 58 static void mapping0_pack(vorbis_info *vi,vorbis_info_mapping *vm,
nuclear@0 59 oggpack_buffer *opb){
nuclear@0 60 int i;
nuclear@0 61 vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)vm;
nuclear@0 62
nuclear@0 63 /* another 'we meant to do it this way' hack... up to beta 4, we
nuclear@0 64 packed 4 binary zeros here to signify one submapping in use. We
nuclear@0 65 now redefine that to mean four bitflags that indicate use of
nuclear@0 66 deeper features; bit0:submappings, bit1:coupling,
nuclear@0 67 bit2,3:reserved. This is backward compatable with all actual uses
nuclear@0 68 of the beta code. */
nuclear@0 69
nuclear@0 70 if(info->submaps>1){
nuclear@0 71 oggpack_write(opb,1,1);
nuclear@0 72 oggpack_write(opb,info->submaps-1,4);
nuclear@0 73 }else
nuclear@0 74 oggpack_write(opb,0,1);
nuclear@0 75
nuclear@0 76 if(info->coupling_steps>0){
nuclear@0 77 oggpack_write(opb,1,1);
nuclear@0 78 oggpack_write(opb,info->coupling_steps-1,8);
nuclear@0 79
nuclear@0 80 for(i=0;i<info->coupling_steps;i++){
nuclear@0 81 oggpack_write(opb,info->coupling_mag[i],ilog(vi->channels));
nuclear@0 82 oggpack_write(opb,info->coupling_ang[i],ilog(vi->channels));
nuclear@0 83 }
nuclear@0 84 }else
nuclear@0 85 oggpack_write(opb,0,1);
nuclear@0 86
nuclear@0 87 oggpack_write(opb,0,2); /* 2,3:reserved */
nuclear@0 88
nuclear@0 89 /* we don't write the channel submappings if we only have one... */
nuclear@0 90 if(info->submaps>1){
nuclear@0 91 for(i=0;i<vi->channels;i++)
nuclear@0 92 oggpack_write(opb,info->chmuxlist[i],4);
nuclear@0 93 }
nuclear@0 94 for(i=0;i<info->submaps;i++){
nuclear@0 95 oggpack_write(opb,0,8); /* time submap unused */
nuclear@0 96 oggpack_write(opb,info->floorsubmap[i],8);
nuclear@0 97 oggpack_write(opb,info->residuesubmap[i],8);
nuclear@0 98 }
nuclear@0 99 }
nuclear@0 100
nuclear@0 101 /* also responsible for range checking */
nuclear@0 102 static vorbis_info_mapping *mapping0_unpack(vorbis_info *vi,oggpack_buffer *opb){
nuclear@0 103 int i,b;
nuclear@0 104 vorbis_info_mapping0 *info=_ogg_calloc(1,sizeof(*info));
nuclear@0 105 codec_setup_info *ci=vi->codec_setup;
nuclear@0 106 memset(info,0,sizeof(*info));
nuclear@0 107
nuclear@0 108 b=oggpack_read(opb,1);
nuclear@0 109 if(b<0)goto err_out;
nuclear@0 110 if(b){
nuclear@0 111 info->submaps=oggpack_read(opb,4)+1;
nuclear@0 112 if(info->submaps<=0)goto err_out;
nuclear@0 113 }else
nuclear@0 114 info->submaps=1;
nuclear@0 115
nuclear@0 116 b=oggpack_read(opb,1);
nuclear@0 117 if(b<0)goto err_out;
nuclear@0 118 if(b){
nuclear@0 119 info->coupling_steps=oggpack_read(opb,8)+1;
nuclear@0 120 if(info->coupling_steps<=0)goto err_out;
nuclear@0 121 for(i=0;i<info->coupling_steps;i++){
nuclear@0 122 int testM=info->coupling_mag[i]=oggpack_read(opb,ilog(vi->channels));
nuclear@0 123 int testA=info->coupling_ang[i]=oggpack_read(opb,ilog(vi->channels));
nuclear@0 124
nuclear@0 125 if(testM<0 ||
nuclear@0 126 testA<0 ||
nuclear@0 127 testM==testA ||
nuclear@0 128 testM>=vi->channels ||
nuclear@0 129 testA>=vi->channels) goto err_out;
nuclear@0 130 }
nuclear@0 131
nuclear@0 132 }
nuclear@0 133
nuclear@0 134 if(oggpack_read(opb,2)!=0)goto err_out; /* 2,3:reserved */
nuclear@0 135
nuclear@0 136 if(info->submaps>1){
nuclear@0 137 for(i=0;i<vi->channels;i++){
nuclear@0 138 info->chmuxlist[i]=oggpack_read(opb,4);
nuclear@0 139 if(info->chmuxlist[i]>=info->submaps || info->chmuxlist[i]<0)goto err_out;
nuclear@0 140 }
nuclear@0 141 }
nuclear@0 142 for(i=0;i<info->submaps;i++){
nuclear@0 143 oggpack_read(opb,8); /* time submap unused */
nuclear@0 144 info->floorsubmap[i]=oggpack_read(opb,8);
nuclear@0 145 if(info->floorsubmap[i]>=ci->floors || info->floorsubmap[i]<0)goto err_out;
nuclear@0 146 info->residuesubmap[i]=oggpack_read(opb,8);
nuclear@0 147 if(info->residuesubmap[i]>=ci->residues || info->residuesubmap[i]<0)goto err_out;
nuclear@0 148 }
nuclear@0 149
nuclear@0 150 return info;
nuclear@0 151
nuclear@0 152 err_out:
nuclear@0 153 mapping0_free_info(info);
nuclear@0 154 return(NULL);
nuclear@0 155 }
nuclear@0 156
nuclear@0 157 #include "os.h"
nuclear@0 158 #include "lpc.h"
nuclear@0 159 #include "lsp.h"
nuclear@0 160 #include "envelope.h"
nuclear@0 161 #include "mdct.h"
nuclear@0 162 #include "psy.h"
nuclear@0 163 #include "scales.h"
nuclear@0 164
nuclear@0 165 #if 0
nuclear@0 166 static long seq=0;
nuclear@0 167 static ogg_int64_t total=0;
nuclear@0 168 static float FLOOR1_fromdB_LOOKUP[256]={
nuclear@0 169 1.0649863e-07F, 1.1341951e-07F, 1.2079015e-07F, 1.2863978e-07F,
nuclear@0 170 1.3699951e-07F, 1.4590251e-07F, 1.5538408e-07F, 1.6548181e-07F,
nuclear@0 171 1.7623575e-07F, 1.8768855e-07F, 1.9988561e-07F, 2.128753e-07F,
nuclear@0 172 2.2670913e-07F, 2.4144197e-07F, 2.5713223e-07F, 2.7384213e-07F,
nuclear@0 173 2.9163793e-07F, 3.1059021e-07F, 3.3077411e-07F, 3.5226968e-07F,
nuclear@0 174 3.7516214e-07F, 3.9954229e-07F, 4.2550680e-07F, 4.5315863e-07F,
nuclear@0 175 4.8260743e-07F, 5.1396998e-07F, 5.4737065e-07F, 5.8294187e-07F,
nuclear@0 176 6.2082472e-07F, 6.6116941e-07F, 7.0413592e-07F, 7.4989464e-07F,
nuclear@0 177 7.9862701e-07F, 8.5052630e-07F, 9.0579828e-07F, 9.6466216e-07F,
nuclear@0 178 1.0273513e-06F, 1.0941144e-06F, 1.1652161e-06F, 1.2409384e-06F,
nuclear@0 179 1.3215816e-06F, 1.4074654e-06F, 1.4989305e-06F, 1.5963394e-06F,
nuclear@0 180 1.7000785e-06F, 1.8105592e-06F, 1.9282195e-06F, 2.0535261e-06F,
nuclear@0 181 2.1869758e-06F, 2.3290978e-06F, 2.4804557e-06F, 2.6416497e-06F,
nuclear@0 182 2.8133190e-06F, 2.9961443e-06F, 3.1908506e-06F, 3.3982101e-06F,
nuclear@0 183 3.6190449e-06F, 3.8542308e-06F, 4.1047004e-06F, 4.3714470e-06F,
nuclear@0 184 4.6555282e-06F, 4.9580707e-06F, 5.2802740e-06F, 5.6234160e-06F,
nuclear@0 185 5.9888572e-06F, 6.3780469e-06F, 6.7925283e-06F, 7.2339451e-06F,
nuclear@0 186 7.7040476e-06F, 8.2047000e-06F, 8.7378876e-06F, 9.3057248e-06F,
nuclear@0 187 9.9104632e-06F, 1.0554501e-05F, 1.1240392e-05F, 1.1970856e-05F,
nuclear@0 188 1.2748789e-05F, 1.3577278e-05F, 1.4459606e-05F, 1.5399272e-05F,
nuclear@0 189 1.6400004e-05F, 1.7465768e-05F, 1.8600792e-05F, 1.9809576e-05F,
nuclear@0 190 2.1096914e-05F, 2.2467911e-05F, 2.3928002e-05F, 2.5482978e-05F,
nuclear@0 191 2.7139006e-05F, 2.8902651e-05F, 3.0780908e-05F, 3.2781225e-05F,
nuclear@0 192 3.4911534e-05F, 3.7180282e-05F, 3.9596466e-05F, 4.2169667e-05F,
nuclear@0 193 4.4910090e-05F, 4.7828601e-05F, 5.0936773e-05F, 5.4246931e-05F,
nuclear@0 194 5.7772202e-05F, 6.1526565e-05F, 6.5524908e-05F, 6.9783085e-05F,
nuclear@0 195 7.4317983e-05F, 7.9147585e-05F, 8.4291040e-05F, 8.9768747e-05F,
nuclear@0 196 9.5602426e-05F, 0.00010181521F, 0.00010843174F, 0.00011547824F,
nuclear@0 197 0.00012298267F, 0.00013097477F, 0.00013948625F, 0.00014855085F,
nuclear@0 198 0.00015820453F, 0.00016848555F, 0.00017943469F, 0.00019109536F,
nuclear@0 199 0.00020351382F, 0.00021673929F, 0.00023082423F, 0.00024582449F,
nuclear@0 200 0.00026179955F, 0.00027881276F, 0.00029693158F, 0.00031622787F,
nuclear@0 201 0.00033677814F, 0.00035866388F, 0.00038197188F, 0.00040679456F,
nuclear@0 202 0.00043323036F, 0.00046138411F, 0.00049136745F, 0.00052329927F,
nuclear@0 203 0.00055730621F, 0.00059352311F, 0.00063209358F, 0.00067317058F,
nuclear@0 204 0.00071691700F, 0.00076350630F, 0.00081312324F, 0.00086596457F,
nuclear@0 205 0.00092223983F, 0.00098217216F, 0.0010459992F, 0.0011139742F,
nuclear@0 206 0.0011863665F, 0.0012634633F, 0.0013455702F, 0.0014330129F,
nuclear@0 207 0.0015261382F, 0.0016253153F, 0.0017309374F, 0.0018434235F,
nuclear@0 208 0.0019632195F, 0.0020908006F, 0.0022266726F, 0.0023713743F,
nuclear@0 209 0.0025254795F, 0.0026895994F, 0.0028643847F, 0.0030505286F,
nuclear@0 210 0.0032487691F, 0.0034598925F, 0.0036847358F, 0.0039241906F,
nuclear@0 211 0.0041792066F, 0.0044507950F, 0.0047400328F, 0.0050480668F,
nuclear@0 212 0.0053761186F, 0.0057254891F, 0.0060975636F, 0.0064938176F,
nuclear@0 213 0.0069158225F, 0.0073652516F, 0.0078438871F, 0.0083536271F,
nuclear@0 214 0.0088964928F, 0.009474637F, 0.010090352F, 0.010746080F,
nuclear@0 215 0.011444421F, 0.012188144F, 0.012980198F, 0.013823725F,
nuclear@0 216 0.014722068F, 0.015678791F, 0.016697687F, 0.017782797F,
nuclear@0 217 0.018938423F, 0.020169149F, 0.021479854F, 0.022875735F,
nuclear@0 218 0.024362330F, 0.025945531F, 0.027631618F, 0.029427276F,
nuclear@0 219 0.031339626F, 0.033376252F, 0.035545228F, 0.037855157F,
nuclear@0 220 0.040315199F, 0.042935108F, 0.045725273F, 0.048696758F,
nuclear@0 221 0.051861348F, 0.055231591F, 0.058820850F, 0.062643361F,
nuclear@0 222 0.066714279F, 0.071049749F, 0.075666962F, 0.080584227F,
nuclear@0 223 0.085821044F, 0.091398179F, 0.097337747F, 0.10366330F,
nuclear@0 224 0.11039993F, 0.11757434F, 0.12521498F, 0.13335215F,
nuclear@0 225 0.14201813F, 0.15124727F, 0.16107617F, 0.17154380F,
nuclear@0 226 0.18269168F, 0.19456402F, 0.20720788F, 0.22067342F,
nuclear@0 227 0.23501402F, 0.25028656F, 0.26655159F, 0.28387361F,
nuclear@0 228 0.30232132F, 0.32196786F, 0.34289114F, 0.36517414F,
nuclear@0 229 0.38890521F, 0.41417847F, 0.44109412F, 0.46975890F,
nuclear@0 230 0.50028648F, 0.53279791F, 0.56742212F, 0.60429640F,
nuclear@0 231 0.64356699F, 0.68538959F, 0.72993007F, 0.77736504F,
nuclear@0 232 0.82788260F, 0.88168307F, 0.9389798F, 1.F,
nuclear@0 233 };
nuclear@0 234
nuclear@0 235 #endif
nuclear@0 236
nuclear@0 237
nuclear@0 238 static int mapping0_forward(vorbis_block *vb){
nuclear@0 239 vorbis_dsp_state *vd=vb->vd;
nuclear@0 240 vorbis_info *vi=vd->vi;
nuclear@0 241 codec_setup_info *ci=vi->codec_setup;
nuclear@0 242 private_state *b=vb->vd->backend_state;
nuclear@0 243 vorbis_block_internal *vbi=(vorbis_block_internal *)vb->internal;
nuclear@0 244 int n=vb->pcmend;
nuclear@0 245 int i,j,k;
nuclear@0 246
nuclear@0 247 int *nonzero = alloca(sizeof(*nonzero)*vi->channels);
nuclear@0 248 float **gmdct = _vorbis_block_alloc(vb,vi->channels*sizeof(*gmdct));
nuclear@0 249 int **iwork = _vorbis_block_alloc(vb,vi->channels*sizeof(*iwork));
nuclear@0 250 int ***floor_posts = _vorbis_block_alloc(vb,vi->channels*sizeof(*floor_posts));
nuclear@0 251
nuclear@0 252 float global_ampmax=vbi->ampmax;
nuclear@0 253 float *local_ampmax=alloca(sizeof(*local_ampmax)*vi->channels);
nuclear@0 254 int blocktype=vbi->blocktype;
nuclear@0 255
nuclear@0 256 int modenumber=vb->W;
nuclear@0 257 vorbis_info_mapping0 *info=ci->map_param[modenumber];
nuclear@0 258 vorbis_look_psy *psy_look=b->psy+blocktype+(vb->W?2:0);
nuclear@0 259
nuclear@0 260 vb->mode=modenumber;
nuclear@0 261
nuclear@0 262 for(i=0;i<vi->channels;i++){
nuclear@0 263 float scale=4.f/n;
nuclear@0 264 float scale_dB;
nuclear@0 265
nuclear@0 266 float *pcm =vb->pcm[i];
nuclear@0 267 float *logfft =pcm;
nuclear@0 268
nuclear@0 269 iwork[i]=_vorbis_block_alloc(vb,n/2*sizeof(**iwork));
nuclear@0 270 gmdct[i]=_vorbis_block_alloc(vb,n/2*sizeof(**gmdct));
nuclear@0 271
nuclear@0 272 scale_dB=todB(&scale) + .345; /* + .345 is a hack; the original
nuclear@0 273 todB estimation used on IEEE 754
nuclear@0 274 compliant machines had a bug that
nuclear@0 275 returned dB values about a third
nuclear@0 276 of a decibel too high. The bug
nuclear@0 277 was harmless because tunings
nuclear@0 278 implicitly took that into
nuclear@0 279 account. However, fixing the bug
nuclear@0 280 in the estimator requires
nuclear@0 281 changing all the tunings as well.
nuclear@0 282 For now, it's easier to sync
nuclear@0 283 things back up here, and
nuclear@0 284 recalibrate the tunings in the
nuclear@0 285 next major model upgrade. */
nuclear@0 286
nuclear@0 287 #if 0
nuclear@0 288 if(vi->channels==2){
nuclear@0 289 if(i==0)
nuclear@0 290 _analysis_output("pcmL",seq,pcm,n,0,0,total-n/2);
nuclear@0 291 else
nuclear@0 292 _analysis_output("pcmR",seq,pcm,n,0,0,total-n/2);
nuclear@0 293 }else{
nuclear@0 294 _analysis_output("pcm",seq,pcm,n,0,0,total-n/2);
nuclear@0 295 }
nuclear@0 296 #endif
nuclear@0 297
nuclear@0 298 /* window the PCM data */
nuclear@0 299 _vorbis_apply_window(pcm,b->window,ci->blocksizes,vb->lW,vb->W,vb->nW);
nuclear@0 300
nuclear@0 301 #if 0
nuclear@0 302 if(vi->channels==2){
nuclear@0 303 if(i==0)
nuclear@0 304 _analysis_output("windowedL",seq,pcm,n,0,0,total-n/2);
nuclear@0 305 else
nuclear@0 306 _analysis_output("windowedR",seq,pcm,n,0,0,total-n/2);
nuclear@0 307 }else{
nuclear@0 308 _analysis_output("windowed",seq,pcm,n,0,0,total-n/2);
nuclear@0 309 }
nuclear@0 310 #endif
nuclear@0 311
nuclear@0 312 /* transform the PCM data */
nuclear@0 313 /* only MDCT right now.... */
nuclear@0 314 mdct_forward(b->transform[vb->W][0],pcm,gmdct[i]);
nuclear@0 315
nuclear@0 316 /* FFT yields more accurate tonal estimation (not phase sensitive) */
nuclear@0 317 drft_forward(&b->fft_look[vb->W],pcm);
nuclear@0 318 logfft[0]=scale_dB+todB(pcm) + .345; /* + .345 is a hack; the
nuclear@0 319 original todB estimation used on
nuclear@0 320 IEEE 754 compliant machines had a
nuclear@0 321 bug that returned dB values about
nuclear@0 322 a third of a decibel too high.
nuclear@0 323 The bug was harmless because
nuclear@0 324 tunings implicitly took that into
nuclear@0 325 account. However, fixing the bug
nuclear@0 326 in the estimator requires
nuclear@0 327 changing all the tunings as well.
nuclear@0 328 For now, it's easier to sync
nuclear@0 329 things back up here, and
nuclear@0 330 recalibrate the tunings in the
nuclear@0 331 next major model upgrade. */
nuclear@0 332 local_ampmax[i]=logfft[0];
nuclear@0 333 for(j=1;j<n-1;j+=2){
nuclear@0 334 float temp=pcm[j]*pcm[j]+pcm[j+1]*pcm[j+1];
nuclear@0 335 temp=logfft[(j+1)>>1]=scale_dB+.5f*todB(&temp) + .345; /* +
nuclear@0 336 .345 is a hack; the original todB
nuclear@0 337 estimation used on IEEE 754
nuclear@0 338 compliant machines had a bug that
nuclear@0 339 returned dB values about a third
nuclear@0 340 of a decibel too high. The bug
nuclear@0 341 was harmless because tunings
nuclear@0 342 implicitly took that into
nuclear@0 343 account. However, fixing the bug
nuclear@0 344 in the estimator requires
nuclear@0 345 changing all the tunings as well.
nuclear@0 346 For now, it's easier to sync
nuclear@0 347 things back up here, and
nuclear@0 348 recalibrate the tunings in the
nuclear@0 349 next major model upgrade. */
nuclear@0 350 if(temp>local_ampmax[i])local_ampmax[i]=temp;
nuclear@0 351 }
nuclear@0 352
nuclear@0 353 if(local_ampmax[i]>0.f)local_ampmax[i]=0.f;
nuclear@0 354 if(local_ampmax[i]>global_ampmax)global_ampmax=local_ampmax[i];
nuclear@0 355
nuclear@0 356 #if 0
nuclear@0 357 if(vi->channels==2){
nuclear@0 358 if(i==0){
nuclear@0 359 _analysis_output("fftL",seq,logfft,n/2,1,0,0);
nuclear@0 360 }else{
nuclear@0 361 _analysis_output("fftR",seq,logfft,n/2,1,0,0);
nuclear@0 362 }
nuclear@0 363 }else{
nuclear@0 364 _analysis_output("fft",seq,logfft,n/2,1,0,0);
nuclear@0 365 }
nuclear@0 366 #endif
nuclear@0 367
nuclear@0 368 }
nuclear@0 369
nuclear@0 370 {
nuclear@0 371 float *noise = _vorbis_block_alloc(vb,n/2*sizeof(*noise));
nuclear@0 372 float *tone = _vorbis_block_alloc(vb,n/2*sizeof(*tone));
nuclear@0 373
nuclear@0 374 for(i=0;i<vi->channels;i++){
nuclear@0 375 /* the encoder setup assumes that all the modes used by any
nuclear@0 376 specific bitrate tweaking use the same floor */
nuclear@0 377
nuclear@0 378 int submap=info->chmuxlist[i];
nuclear@0 379
nuclear@0 380 /* the following makes things clearer to *me* anyway */
nuclear@0 381 float *mdct =gmdct[i];
nuclear@0 382 float *logfft =vb->pcm[i];
nuclear@0 383
nuclear@0 384 float *logmdct =logfft+n/2;
nuclear@0 385 float *logmask =logfft;
nuclear@0 386
nuclear@0 387 vb->mode=modenumber;
nuclear@0 388
nuclear@0 389 floor_posts[i]=_vorbis_block_alloc(vb,PACKETBLOBS*sizeof(**floor_posts));
nuclear@0 390 memset(floor_posts[i],0,sizeof(**floor_posts)*PACKETBLOBS);
nuclear@0 391
nuclear@0 392 for(j=0;j<n/2;j++)
nuclear@0 393 logmdct[j]=todB(mdct+j) + .345; /* + .345 is a hack; the original
nuclear@0 394 todB estimation used on IEEE 754
nuclear@0 395 compliant machines had a bug that
nuclear@0 396 returned dB values about a third
nuclear@0 397 of a decibel too high. The bug
nuclear@0 398 was harmless because tunings
nuclear@0 399 implicitly took that into
nuclear@0 400 account. However, fixing the bug
nuclear@0 401 in the estimator requires
nuclear@0 402 changing all the tunings as well.
nuclear@0 403 For now, it's easier to sync
nuclear@0 404 things back up here, and
nuclear@0 405 recalibrate the tunings in the
nuclear@0 406 next major model upgrade. */
nuclear@0 407
nuclear@0 408 #if 0
nuclear@0 409 if(vi->channels==2){
nuclear@0 410 if(i==0)
nuclear@0 411 _analysis_output("mdctL",seq,logmdct,n/2,1,0,0);
nuclear@0 412 else
nuclear@0 413 _analysis_output("mdctR",seq,logmdct,n/2,1,0,0);
nuclear@0 414 }else{
nuclear@0 415 _analysis_output("mdct",seq,logmdct,n/2,1,0,0);
nuclear@0 416 }
nuclear@0 417 #endif
nuclear@0 418
nuclear@0 419 /* first step; noise masking. Not only does 'noise masking'
nuclear@0 420 give us curves from which we can decide how much resolution
nuclear@0 421 to give noise parts of the spectrum, it also implicitly hands
nuclear@0 422 us a tonality estimate (the larger the value in the
nuclear@0 423 'noise_depth' vector, the more tonal that area is) */
nuclear@0 424
nuclear@0 425 _vp_noisemask(psy_look,
nuclear@0 426 logmdct,
nuclear@0 427 noise); /* noise does not have by-frequency offset
nuclear@0 428 bias applied yet */
nuclear@0 429 #if 0
nuclear@0 430 if(vi->channels==2){
nuclear@0 431 if(i==0)
nuclear@0 432 _analysis_output("noiseL",seq,noise,n/2,1,0,0);
nuclear@0 433 else
nuclear@0 434 _analysis_output("noiseR",seq,noise,n/2,1,0,0);
nuclear@0 435 }else{
nuclear@0 436 _analysis_output("noise",seq,noise,n/2,1,0,0);
nuclear@0 437 }
nuclear@0 438 #endif
nuclear@0 439
nuclear@0 440 /* second step: 'all the other crap'; all the stuff that isn't
nuclear@0 441 computed/fit for bitrate management goes in the second psy
nuclear@0 442 vector. This includes tone masking, peak limiting and ATH */
nuclear@0 443
nuclear@0 444 _vp_tonemask(psy_look,
nuclear@0 445 logfft,
nuclear@0 446 tone,
nuclear@0 447 global_ampmax,
nuclear@0 448 local_ampmax[i]);
nuclear@0 449
nuclear@0 450 #if 0
nuclear@0 451 if(vi->channels==2){
nuclear@0 452 if(i==0)
nuclear@0 453 _analysis_output("toneL",seq,tone,n/2,1,0,0);
nuclear@0 454 else
nuclear@0 455 _analysis_output("toneR",seq,tone,n/2,1,0,0);
nuclear@0 456 }else{
nuclear@0 457 _analysis_output("tone",seq,tone,n/2,1,0,0);
nuclear@0 458 }
nuclear@0 459 #endif
nuclear@0 460
nuclear@0 461 /* third step; we offset the noise vectors, overlay tone
nuclear@0 462 masking. We then do a floor1-specific line fit. If we're
nuclear@0 463 performing bitrate management, the line fit is performed
nuclear@0 464 multiple times for up/down tweakage on demand. */
nuclear@0 465
nuclear@0 466 #if 0
nuclear@0 467 {
nuclear@0 468 float aotuv[psy_look->n];
nuclear@0 469 #endif
nuclear@0 470
nuclear@0 471 _vp_offset_and_mix(psy_look,
nuclear@0 472 noise,
nuclear@0 473 tone,
nuclear@0 474 1,
nuclear@0 475 logmask,
nuclear@0 476 mdct,
nuclear@0 477 logmdct);
nuclear@0 478
nuclear@0 479 #if 0
nuclear@0 480 if(vi->channels==2){
nuclear@0 481 if(i==0)
nuclear@0 482 _analysis_output("aotuvM1_L",seq,aotuv,psy_look->n,1,1,0);
nuclear@0 483 else
nuclear@0 484 _analysis_output("aotuvM1_R",seq,aotuv,psy_look->n,1,1,0);
nuclear@0 485 }else{
nuclear@0 486 _analysis_output("aotuvM1",seq,aotuv,psy_look->n,1,1,0);
nuclear@0 487 }
nuclear@0 488 }
nuclear@0 489 #endif
nuclear@0 490
nuclear@0 491
nuclear@0 492 #if 0
nuclear@0 493 if(vi->channels==2){
nuclear@0 494 if(i==0)
nuclear@0 495 _analysis_output("mask1L",seq,logmask,n/2,1,0,0);
nuclear@0 496 else
nuclear@0 497 _analysis_output("mask1R",seq,logmask,n/2,1,0,0);
nuclear@0 498 }else{
nuclear@0 499 _analysis_output("mask1",seq,logmask,n/2,1,0,0);
nuclear@0 500 }
nuclear@0 501 #endif
nuclear@0 502
nuclear@0 503 /* this algorithm is hardwired to floor 1 for now; abort out if
nuclear@0 504 we're *not* floor1. This won't happen unless someone has
nuclear@0 505 broken the encode setup lib. Guard it anyway. */
nuclear@0 506 if(ci->floor_type[info->floorsubmap[submap]]!=1)return(-1);
nuclear@0 507
nuclear@0 508 floor_posts[i][PACKETBLOBS/2]=
nuclear@0 509 floor1_fit(vb,b->flr[info->floorsubmap[submap]],
nuclear@0 510 logmdct,
nuclear@0 511 logmask);
nuclear@0 512
nuclear@0 513 /* are we managing bitrate? If so, perform two more fits for
nuclear@0 514 later rate tweaking (fits represent hi/lo) */
nuclear@0 515 if(vorbis_bitrate_managed(vb) && floor_posts[i][PACKETBLOBS/2]){
nuclear@0 516 /* higher rate by way of lower noise curve */
nuclear@0 517
nuclear@0 518 _vp_offset_and_mix(psy_look,
nuclear@0 519 noise,
nuclear@0 520 tone,
nuclear@0 521 2,
nuclear@0 522 logmask,
nuclear@0 523 mdct,
nuclear@0 524 logmdct);
nuclear@0 525
nuclear@0 526 #if 0
nuclear@0 527 if(vi->channels==2){
nuclear@0 528 if(i==0)
nuclear@0 529 _analysis_output("mask2L",seq,logmask,n/2,1,0,0);
nuclear@0 530 else
nuclear@0 531 _analysis_output("mask2R",seq,logmask,n/2,1,0,0);
nuclear@0 532 }else{
nuclear@0 533 _analysis_output("mask2",seq,logmask,n/2,1,0,0);
nuclear@0 534 }
nuclear@0 535 #endif
nuclear@0 536
nuclear@0 537 floor_posts[i][PACKETBLOBS-1]=
nuclear@0 538 floor1_fit(vb,b->flr[info->floorsubmap[submap]],
nuclear@0 539 logmdct,
nuclear@0 540 logmask);
nuclear@0 541
nuclear@0 542 /* lower rate by way of higher noise curve */
nuclear@0 543 _vp_offset_and_mix(psy_look,
nuclear@0 544 noise,
nuclear@0 545 tone,
nuclear@0 546 0,
nuclear@0 547 logmask,
nuclear@0 548 mdct,
nuclear@0 549 logmdct);
nuclear@0 550
nuclear@0 551 #if 0
nuclear@0 552 if(vi->channels==2){
nuclear@0 553 if(i==0)
nuclear@0 554 _analysis_output("mask0L",seq,logmask,n/2,1,0,0);
nuclear@0 555 else
nuclear@0 556 _analysis_output("mask0R",seq,logmask,n/2,1,0,0);
nuclear@0 557 }else{
nuclear@0 558 _analysis_output("mask0",seq,logmask,n/2,1,0,0);
nuclear@0 559 }
nuclear@0 560 #endif
nuclear@0 561
nuclear@0 562 floor_posts[i][0]=
nuclear@0 563 floor1_fit(vb,b->flr[info->floorsubmap[submap]],
nuclear@0 564 logmdct,
nuclear@0 565 logmask);
nuclear@0 566
nuclear@0 567 /* we also interpolate a range of intermediate curves for
nuclear@0 568 intermediate rates */
nuclear@0 569 for(k=1;k<PACKETBLOBS/2;k++)
nuclear@0 570 floor_posts[i][k]=
nuclear@0 571 floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
nuclear@0 572 floor_posts[i][0],
nuclear@0 573 floor_posts[i][PACKETBLOBS/2],
nuclear@0 574 k*65536/(PACKETBLOBS/2));
nuclear@0 575 for(k=PACKETBLOBS/2+1;k<PACKETBLOBS-1;k++)
nuclear@0 576 floor_posts[i][k]=
nuclear@0 577 floor1_interpolate_fit(vb,b->flr[info->floorsubmap[submap]],
nuclear@0 578 floor_posts[i][PACKETBLOBS/2],
nuclear@0 579 floor_posts[i][PACKETBLOBS-1],
nuclear@0 580 (k-PACKETBLOBS/2)*65536/(PACKETBLOBS/2));
nuclear@0 581 }
nuclear@0 582 }
nuclear@0 583 }
nuclear@0 584 vbi->ampmax=global_ampmax;
nuclear@0 585
nuclear@0 586 /*
nuclear@0 587 the next phases are performed once for vbr-only and PACKETBLOB
nuclear@0 588 times for bitrate managed modes.
nuclear@0 589
nuclear@0 590 1) encode actual mode being used
nuclear@0 591 2) encode the floor for each channel, compute coded mask curve/res
nuclear@0 592 3) normalize and couple.
nuclear@0 593 4) encode residue
nuclear@0 594 5) save packet bytes to the packetblob vector
nuclear@0 595
nuclear@0 596 */
nuclear@0 597
nuclear@0 598 /* iterate over the many masking curve fits we've created */
nuclear@0 599
nuclear@0 600 {
nuclear@0 601 int **couple_bundle=alloca(sizeof(*couple_bundle)*vi->channels);
nuclear@0 602 int *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
nuclear@0 603
nuclear@0 604 for(k=(vorbis_bitrate_managed(vb)?0:PACKETBLOBS/2);
nuclear@0 605 k<=(vorbis_bitrate_managed(vb)?PACKETBLOBS-1:PACKETBLOBS/2);
nuclear@0 606 k++){
nuclear@0 607 oggpack_buffer *opb=vbi->packetblob[k];
nuclear@0 608
nuclear@0 609 /* start out our new packet blob with packet type and mode */
nuclear@0 610 /* Encode the packet type */
nuclear@0 611 oggpack_write(opb,0,1);
nuclear@0 612 /* Encode the modenumber */
nuclear@0 613 /* Encode frame mode, pre,post windowsize, then dispatch */
nuclear@0 614 oggpack_write(opb,modenumber,b->modebits);
nuclear@0 615 if(vb->W){
nuclear@0 616 oggpack_write(opb,vb->lW,1);
nuclear@0 617 oggpack_write(opb,vb->nW,1);
nuclear@0 618 }
nuclear@0 619
nuclear@0 620 /* encode floor, compute masking curve, sep out residue */
nuclear@0 621 for(i=0;i<vi->channels;i++){
nuclear@0 622 int submap=info->chmuxlist[i];
nuclear@0 623 int *ilogmask=iwork[i];
nuclear@0 624
nuclear@0 625 nonzero[i]=floor1_encode(opb,vb,b->flr[info->floorsubmap[submap]],
nuclear@0 626 floor_posts[i][k],
nuclear@0 627 ilogmask);
nuclear@0 628 #if 0
nuclear@0 629 {
nuclear@0 630 char buf[80];
nuclear@0 631 sprintf(buf,"maskI%c%d",i?'R':'L',k);
nuclear@0 632 float work[n/2];
nuclear@0 633 for(j=0;j<n/2;j++)
nuclear@0 634 work[j]=FLOOR1_fromdB_LOOKUP[iwork[i][j]];
nuclear@0 635 _analysis_output(buf,seq,work,n/2,1,1,0);
nuclear@0 636 }
nuclear@0 637 #endif
nuclear@0 638 }
nuclear@0 639
nuclear@0 640 /* our iteration is now based on masking curve, not prequant and
nuclear@0 641 coupling. Only one prequant/coupling step */
nuclear@0 642
nuclear@0 643 /* quantize/couple */
nuclear@0 644 /* incomplete implementation that assumes the tree is all depth
nuclear@0 645 one, or no tree at all */
nuclear@0 646 _vp_couple_quantize_normalize(k,
nuclear@0 647 &ci->psy_g_param,
nuclear@0 648 psy_look,
nuclear@0 649 info,
nuclear@0 650 gmdct,
nuclear@0 651 iwork,
nuclear@0 652 nonzero,
nuclear@0 653 ci->psy_g_param.sliding_lowpass[vb->W][k],
nuclear@0 654 vi->channels);
nuclear@0 655
nuclear@0 656 #if 0
nuclear@0 657 for(i=0;i<vi->channels;i++){
nuclear@0 658 char buf[80];
nuclear@0 659 sprintf(buf,"res%c%d",i?'R':'L',k);
nuclear@0 660 float work[n/2];
nuclear@0 661 for(j=0;j<n/2;j++)
nuclear@0 662 work[j]=iwork[i][j];
nuclear@0 663 _analysis_output(buf,seq,work,n/2,1,0,0);
nuclear@0 664 }
nuclear@0 665 #endif
nuclear@0 666
nuclear@0 667 /* classify and encode by submap */
nuclear@0 668 for(i=0;i<info->submaps;i++){
nuclear@0 669 int ch_in_bundle=0;
nuclear@0 670 long **classifications;
nuclear@0 671 int resnum=info->residuesubmap[i];
nuclear@0 672
nuclear@0 673 for(j=0;j<vi->channels;j++){
nuclear@0 674 if(info->chmuxlist[j]==i){
nuclear@0 675 zerobundle[ch_in_bundle]=0;
nuclear@0 676 if(nonzero[j])zerobundle[ch_in_bundle]=1;
nuclear@0 677 couple_bundle[ch_in_bundle++]=iwork[j];
nuclear@0 678 }
nuclear@0 679 }
nuclear@0 680
nuclear@0 681 classifications=_residue_P[ci->residue_type[resnum]]->
nuclear@0 682 class(vb,b->residue[resnum],couple_bundle,zerobundle,ch_in_bundle);
nuclear@0 683
nuclear@0 684 ch_in_bundle=0;
nuclear@0 685 for(j=0;j<vi->channels;j++)
nuclear@0 686 if(info->chmuxlist[j]==i)
nuclear@0 687 couple_bundle[ch_in_bundle++]=iwork[j];
nuclear@0 688
nuclear@0 689 _residue_P[ci->residue_type[resnum]]->
nuclear@0 690 forward(opb,vb,b->residue[resnum],
nuclear@0 691 couple_bundle,zerobundle,ch_in_bundle,classifications,i);
nuclear@0 692 }
nuclear@0 693
nuclear@0 694 /* ok, done encoding. Next protopacket. */
nuclear@0 695 }
nuclear@0 696
nuclear@0 697 }
nuclear@0 698
nuclear@0 699 #if 0
nuclear@0 700 seq++;
nuclear@0 701 total+=ci->blocksizes[vb->W]/4+ci->blocksizes[vb->nW]/4;
nuclear@0 702 #endif
nuclear@0 703 return(0);
nuclear@0 704 }
nuclear@0 705
nuclear@0 706 static int mapping0_inverse(vorbis_block *vb,vorbis_info_mapping *l){
nuclear@0 707 vorbis_dsp_state *vd=vb->vd;
nuclear@0 708 vorbis_info *vi=vd->vi;
nuclear@0 709 codec_setup_info *ci=vi->codec_setup;
nuclear@0 710 private_state *b=vd->backend_state;
nuclear@0 711 vorbis_info_mapping0 *info=(vorbis_info_mapping0 *)l;
nuclear@0 712
nuclear@0 713 int i,j;
nuclear@0 714 long n=vb->pcmend=ci->blocksizes[vb->W];
nuclear@0 715
nuclear@0 716 float **pcmbundle=alloca(sizeof(*pcmbundle)*vi->channels);
nuclear@0 717 int *zerobundle=alloca(sizeof(*zerobundle)*vi->channels);
nuclear@0 718
nuclear@0 719 int *nonzero =alloca(sizeof(*nonzero)*vi->channels);
nuclear@0 720 void **floormemo=alloca(sizeof(*floormemo)*vi->channels);
nuclear@0 721
nuclear@0 722 /* recover the spectral envelope; store it in the PCM vector for now */
nuclear@0 723 for(i=0;i<vi->channels;i++){
nuclear@0 724 int submap=info->chmuxlist[i];
nuclear@0 725 floormemo[i]=_floor_P[ci->floor_type[info->floorsubmap[submap]]]->
nuclear@0 726 inverse1(vb,b->flr[info->floorsubmap[submap]]);
nuclear@0 727 if(floormemo[i])
nuclear@0 728 nonzero[i]=1;
nuclear@0 729 else
nuclear@0 730 nonzero[i]=0;
nuclear@0 731 memset(vb->pcm[i],0,sizeof(*vb->pcm[i])*n/2);
nuclear@0 732 }
nuclear@0 733
nuclear@0 734 /* channel coupling can 'dirty' the nonzero listing */
nuclear@0 735 for(i=0;i<info->coupling_steps;i++){
nuclear@0 736 if(nonzero[info->coupling_mag[i]] ||
nuclear@0 737 nonzero[info->coupling_ang[i]]){
nuclear@0 738 nonzero[info->coupling_mag[i]]=1;
nuclear@0 739 nonzero[info->coupling_ang[i]]=1;
nuclear@0 740 }
nuclear@0 741 }
nuclear@0 742
nuclear@0 743 /* recover the residue into our working vectors */
nuclear@0 744 for(i=0;i<info->submaps;i++){
nuclear@0 745 int ch_in_bundle=0;
nuclear@0 746 for(j=0;j<vi->channels;j++){
nuclear@0 747 if(info->chmuxlist[j]==i){
nuclear@0 748 if(nonzero[j])
nuclear@0 749 zerobundle[ch_in_bundle]=1;
nuclear@0 750 else
nuclear@0 751 zerobundle[ch_in_bundle]=0;
nuclear@0 752 pcmbundle[ch_in_bundle++]=vb->pcm[j];
nuclear@0 753 }
nuclear@0 754 }
nuclear@0 755
nuclear@0 756 _residue_P[ci->residue_type[info->residuesubmap[i]]]->
nuclear@0 757 inverse(vb,b->residue[info->residuesubmap[i]],
nuclear@0 758 pcmbundle,zerobundle,ch_in_bundle);
nuclear@0 759 }
nuclear@0 760
nuclear@0 761 /* channel coupling */
nuclear@0 762 for(i=info->coupling_steps-1;i>=0;i--){
nuclear@0 763 float *pcmM=vb->pcm[info->coupling_mag[i]];
nuclear@0 764 float *pcmA=vb->pcm[info->coupling_ang[i]];
nuclear@0 765
nuclear@0 766 for(j=0;j<n/2;j++){
nuclear@0 767 float mag=pcmM[j];
nuclear@0 768 float ang=pcmA[j];
nuclear@0 769
nuclear@0 770 if(mag>0)
nuclear@0 771 if(ang>0){
nuclear@0 772 pcmM[j]=mag;
nuclear@0 773 pcmA[j]=mag-ang;
nuclear@0 774 }else{
nuclear@0 775 pcmA[j]=mag;
nuclear@0 776 pcmM[j]=mag+ang;
nuclear@0 777 }
nuclear@0 778 else
nuclear@0 779 if(ang>0){
nuclear@0 780 pcmM[j]=mag;
nuclear@0 781 pcmA[j]=mag+ang;
nuclear@0 782 }else{
nuclear@0 783 pcmA[j]=mag;
nuclear@0 784 pcmM[j]=mag-ang;
nuclear@0 785 }
nuclear@0 786 }
nuclear@0 787 }
nuclear@0 788
nuclear@0 789 /* compute and apply spectral envelope */
nuclear@0 790 for(i=0;i<vi->channels;i++){
nuclear@0 791 float *pcm=vb->pcm[i];
nuclear@0 792 int submap=info->chmuxlist[i];
nuclear@0 793 _floor_P[ci->floor_type[info->floorsubmap[submap]]]->
nuclear@0 794 inverse2(vb,b->flr[info->floorsubmap[submap]],
nuclear@0 795 floormemo[i],pcm);
nuclear@0 796 }
nuclear@0 797
nuclear@0 798 /* transform the PCM data; takes PCM vector, vb; modifies PCM vector */
nuclear@0 799 /* only MDCT right now.... */
nuclear@0 800 for(i=0;i<vi->channels;i++){
nuclear@0 801 float *pcm=vb->pcm[i];
nuclear@0 802 mdct_backward(b->transform[vb->W][0],pcm,pcm);
nuclear@0 803 }
nuclear@0 804
nuclear@0 805 /* all done! */
nuclear@0 806 return(0);
nuclear@0 807 }
nuclear@0 808
nuclear@0 809 /* export hooks */
nuclear@0 810 const vorbis_func_mapping mapping0_exportbundle={
nuclear@0 811 &mapping0_pack,
nuclear@0 812 &mapping0_unpack,
nuclear@0 813 &mapping0_free_info,
nuclear@0 814 &mapping0_forward,
nuclear@0 815 &mapping0_inverse
nuclear@0 816 };