lib/psytune.c

   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 1994-2007             *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: simple utility that runs audio through the psychoacoustics
  14            without encoding
  15
  16  ********************************************************************/
  17
  18 /* NB: this is dead code, retained purely for doc and reference value
  19        don't try to compile it */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <math.h>
  25
  26 #include "vorbis/codec.h"
  27 #include "codec_internal.h"
  28 #include "os.h"
  29 #include "misc.h"
  30 #include "psy.h"
  31 #include "mdct.h"
  32 #include "smallft.h"
  33 #include "window.h"
  34 #include "scales.h"
  35 #include "lpc.h"
  36 #include "lsp.h"
  37 #include "masking.h"
  38 #include "registry.h"
  39
  40 static vorbis_info_psy_global _psy_set0G={
  41   0,   /* decaydBpms */
  42   8,   /* lines per eighth octave */
  43
  44   /* thresh sample period, preecho clamp trigger threshhold, range, minenergy */
  45   256, {26.f,26.f,26.f,30.f}, {-90.f,-90.f,-90.f,-90.f}, -90.f,
  46   -6.f,
  47
  48   0,
  49
  50   0.,
  51   0.,
  52 };
  53
  54 static vp_part _vp_part0[]={
  55   {    1,9e10f, 9e10f,       1.f,9999.f},
  56   { 9999,  .75f, 9e10f,       .5f,9999.f},
  57 /*{ 9999, 1.5f, 9e10f,       .5f,9999.f},*/
  58   {   18,9e10f, 9e10f,       .5f,  30.f},
  59   { 9999,9e10f, 9e10f,       .5f,  30.f}
  60 };
  61
  62 static vp_couple _vp_couple0[]={
  63   {    1,  {9e10f,9e10f,0}, {   0.f,   0.f,0}, {   0.f, 0.f,0}, {0.f,0.f,0}},
  64   {   18,  {9e10f,9e10f,0}, {   0.f,   0.f,0}, {   0.f, 0.f,0}, {0.f,0.f,0}},
  65   { 9999,  {9e10f,9e10f,0}, {   0.f, 9e10f,0}, {   0.f,22.f,1}, {0.f,0.f,0}}
  66 };
  67
  68 static vorbis_info_psy _psy_set0={
  69   ATH_Bark_dB_lineaggressive,
  70
  71   -100.f,
  72   -140.f,
  73   6.f, /* floor master att */
  74
  75   /*     0  1  2   3   4   5   6   7   8   9  10  11  12  13  14  15   16   */
  76   /* x: 63 88 125 175 250 350 500 700 1k 1.4k 2k 2.8k 4k 5.6k 8k 11.5k 16k Hz */
  77   /* y: 0 10 20 30 40 50 60 70 80 90 100 dB */
  78    1,  /* tonemaskp */
  79   0.f, /* tone master att */
  80   /*  0   10   20   30   40   50   60   70   80   90   100 */
  81   {
  82    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*63*/
  83    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*88*/
  84    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*125*/
  85
  86    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*175*/
  87    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*250*/
  88    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*350*/
  89    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*500*/
  90    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*700*/
  91    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1000*/
  92    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1400*/
  93    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2000*/
  94    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2800*/
  95    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*4000*/
  96
  97    {-30.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*5600*/
  98
  99    {-30.f,-30.f,-33.f,-35.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*8000*/
 100    {-30.f,-30.f,-33.f,-35.f,-40.f,-45.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*11500*/
 101    {-24.f,-24.f,-26.f,-32.f,-32.f,-42.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*16000*/
 102
 103   },
 104
 105   1,/* peakattp */
 106   {{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*63*/
 107    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*88*/
 108    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*125*/
 109    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*175*/
 110    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*250*/
 111    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*350*/
 112    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*500*/
 113    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*700*/
 114    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1000*/
 115    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1400*/
 116    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2000*/
 117    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2800*/
 118    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*4000*/
 119    {-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*5600*/
 120    {-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*8000*/
 121    {-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*11500*/
 122    {-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*16000*/
 123   },
 124
 125   1,/*noisemaskp */
 126   -10.f,  /* suppress any noise curve over maxspec+n */
 127   .5f,   /* low window */
 128   .5f,   /* high window */
 129   10,
 130   10,
 131   25,
 132   {.000f, 0.f, /*63*/
 133    .000f, 0.f, /*88*/
 134    .000f, 0.f, /*125*/
 135    .000f, 0.f, /*175*/
 136    .000f, 0.f, /*250*/
 137    .000f, 0.f, /*350*/
 138    .000f, 0.f, /*500*/
 139    .000f, 0.f, /*700*/
 140    .000f, 0.f, /*1000*/
 141    .300f, 0.f, /*1400*/
 142    .300f, 0.f, /*2000*/
 143    .300f, 0.f, /*2800*/
 144    .500f, 0.f, /*4000*/
 145    .700f, 0.f, /*5600*/
 146    .850f, 0.f, /*8000*/
 147    .900f, 0.f, /*11500*/
 148    .900f, 1.f, /*16000*/
 149   },
 150
 151   95.f,  /* even decade + 5 is important; saves an rint() later in a
 152             tight loop) */
 153   -44.,
 154
 155   32,
 156   _vp_part0,_vp_couple0
 157 };
 158
 159 static vorbis_info_floor1 _floor_set0={1,
 160                                         {0},
 161
 162                                         {32},
 163                                         {0},
 164                                         {0},
 165                                         {{-1}},
 166
 167                                         2,
 168                                         {0,1024,
 169
 170                                          88,31,243,
 171
 172                                          14,54,143,460,
 173
 174                                          6,3,10, 22,18,26, 41,36,47,
 175                                          69,61,78, 112,99,126, 185,162,211,
 176                                          329,282,387, 672,553,825
 177                                          },
 178
 179                                         60,30,400,
 180                                         20,8,1,18.,
 181                                         20,600,
 182                                         960};
 183
 184
 185 static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}};
 186 static codec_setup_info codec_setup0={ {0,0},
 187                                        1,1,1,1,1,0,1,
 188                                        {NULL},
 189                                        {0},{&mapping_info},
 190                                        {0},{NULL},
 191                                        {1},{&_floor_set0},
 192                                        {2},{NULL},
 193                                        {NULL},
 194                                        {&_psy_set0},
 195                                        &_psy_set0G};
 196
 197 static int noisy=0;
 198 void analysis(char *base,int i,float *v,int n,int bark,int dB){
 199   if(noisy){
 200     int j;
 201     FILE *of;
 202     char buffer[80];
 203     sprintf(buffer,"%s_%d.m",base,i);
 204     of=fopen(buffer,"w");
 205
 206     for(j=0;j<n;j++){
 207       if(dB && v[j]==0)
 208           fprintf(of,"\n\n");
 209       else{
 210         if(bark)
 211           fprintf(of,"%g ",toBARK(22050.f*j/n));
 212         else
 213           fprintf(of,"%g ",(float)j);
 214
 215         if(dB){
 216           fprintf(of,"%g\n",todB(v+j));
 217         }else{
 218           fprintf(of,"%g\n",v[j]);
 219         }
 220       }
 221     }
 222     fclose(of);
 223   }
 224 }
 225
 226 long frameno=0;
 227
 228 /****************************************************************/
 229
 230 int main(int argc,char *argv[]){
 231   int eos=0;
 232   float nonz=0.f;
 233   float acc=0.f;
 234   float tot=0.f;
 235   float ampmax=-9999,newmax;
 236   float local_ampmax[2];
 237
 238   int framesize=2048;
 239   float ampmax_att_per_sec=-6.;
 240
 241   float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2];
 242   signed char *buffer,*buffer2;
 243   mdct_lookup m_look;
 244   drft_lookup f_look;
 245   vorbis_look_psy p_look;
 246   vorbis_look_psy_global *pg_look;
 247   vorbis_look_floor *floor_look;
 248   vorbis_info vi;
 249   long i,j,k;
 250
 251   int ath=0;
 252   int decayp=0;
 253
 254   argv++;
 255   while(*argv){
 256     if(*argv[0]=='-'){
 257       /* option */
 258       if(argv[0][1]=='v'){
 259         noisy=0;
 260       }
 261     }else
 262       if(*argv[0]=='+'){
 263         /* option */
 264         if(argv[0][1]=='v'){
 265           noisy=1;
 266         }
 267       }else
 268         framesize=atoi(argv[0]);
 269     argv++;
 270   }
 271
 272   vi.channels=2;
 273   vi.codec_setup=&codec_setup0;
 274
 275   pcm[0]=_ogg_malloc(framesize*sizeof(float));
 276   pcm[1]=_ogg_malloc(framesize*sizeof(float));
 277   out[0]=_ogg_calloc(framesize/2,sizeof(float));
 278   out[1]=_ogg_calloc(framesize/2,sizeof(float));
 279   work[0]=_ogg_calloc(framesize,sizeof(float));
 280   work[1]=_ogg_calloc(framesize,sizeof(float));
 281   flr[0]=_ogg_calloc(framesize/2,sizeof(float));
 282   flr[1]=_ogg_calloc(framesize/2,sizeof(float));
 283   buffer=_ogg_malloc(framesize*4);
 284   buffer2=buffer+framesize*2;
 285   window=_vorbis_window_create(0,framesize,framesize/2,framesize/2);
 286   mdct_init(&m_look,framesize);
 287   drft_init(&f_look,framesize);
 288   _vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100);
 289   pg_look=_vp_global_look(&vi);
 290   floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0);
 291
 292   /* we cheat on the WAV header; we just bypass 44 bytes and never
 293      verify that it matches 16bit/stereo/44.1kHz. */
 294
 295   fread(buffer,1,44,stdin);
 296   fwrite(buffer,1,44,stdout);
 297   memset(buffer,0,framesize*2);
 298
 299   analysis("window",0,window,framesize,0,0);
 300
 301   fprintf(stderr,"Processing for frame size %d...\n",framesize);
 302
 303   while(!eos){
 304     long bytes=fread(buffer2,1,framesize*2,stdin);
 305     if(bytes<framesize*2)
 306       memset(buffer2+bytes,0,framesize*2-bytes);
 307
 308     if(bytes!=0){
 309       int nonzero[2];
 310
 311       /* uninterleave samples */
 312       for(i=0;i<framesize;i++){
 313         pcm[0][i]=((buffer[i*4+1]<<8)|
 314                       (0x00ff&(int)buffer[i*4]))/32768.f;
 315         pcm[1][i]=((buffer[i*4+3]<<8)|
 316                    (0x00ff&(int)buffer[i*4+2]))/32768.f;
 317       }
 318
 319       {
 320         float secs=framesize/44100.;
 321
 322         ampmax+=secs*ampmax_att_per_sec;
 323         if(ampmax<-9999)ampmax=-9999;
 324       }
 325
 326       for(i=0;i<2;i++){
 327         float scale=4.f/framesize;
 328         float *fft=work[i];
 329         float *mdct=pcm[i];
 330         float *logmdct=mdct+framesize/2;
 331
 332         analysis("pre",frameno+i,pcm[i],framesize,0,0);
 333
 334         /* fft and mdct transforms  */
 335         for(j=0;j<framesize;j++)
 336           fft[j]=pcm[i][j]*=window[j];
 337
 338         drft_forward(&f_look,fft);
 339
 340         local_ampmax[i]=-9999.f;
 341         fft[0]*=scale;
 342         fft[0]=todB(fft);
 343         for(j=1;j<framesize-1;j+=2){
 344           float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
 345           temp=fft[(j+1)>>1]=todB(&temp);
 346           if(temp>local_ampmax[i])local_ampmax[i]=temp;
 347         }
 348         if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i];
 349
 350         mdct_forward(&m_look,pcm[i],mdct);
 351         for(j=0;j<framesize/2;j++)
 352           logmdct[j]=todB(mdct+j);
 353
 354         analysis("mdct",frameno+i,logmdct,framesize/2,1,0);
 355         analysis("fft",frameno+i,fft,framesize/2,1,0);
 356       }
 357
 358       for(i=0;i<2;i++){
 359         float amp;
 360         float *fft=work[i];
 361         float *logmax=fft;
 362         float *mdct=pcm[i];
 363         float *logmdct=mdct+framesize/2;
 364         float *mask=fft+framesize/2;
 365
 366         /* floor psychoacoustics */
 367         _vp_compute_mask(&p_look,
 368                          pg_look,
 369                          i,
 370                          fft,
 371                          logmdct,
 372                          mask,
 373                          ampmax,
 374                          local_ampmax[i],
 375                          framesize/2);
 376
 377         analysis("mask",frameno+i,mask,framesize/2,1,0);
 378
 379         {
 380           vorbis_block vb;
 381           vorbis_dsp_state vd;
 382           memset(&vd,0,sizeof(vd));
 383           vd.vi=&vi;
 384           vb.vd=&vd;
 385           vb.pcmend=framesize;
 386
 387           /* floor quantization/application */
 388           nonzero[i]=_floor_P[1]->forward(&vb,floor_look,
 389                                           mdct,
 390                                           logmdct,
 391                                           mask,
 392                                           logmax,
 393
 394                                           flr[i]);
 395         }
 396
 397         _vp_remove_floor(&p_look,
 398                          pg_look,
 399                          logmdct,
 400                          mdct,
 401                          flr[i],
 402                          pcm[i],
 403                          local_ampmax[i]);
 404
 405         for(j=0;j<framesize/2;j++)
 406           if(fabs(pcm[i][j])>1500)
 407             fprintf(stderr,"%ld ",frameno+i);
 408
 409         analysis("res",frameno+i,pcm[i],framesize/2,1,0);
 410         analysis("codedflr",frameno+i,flr[i],framesize/2,1,1);
 411       }
 412
 413       /* residue prequantization */
 414       _vp_partition_prequant(&p_look,
 415                              &vi,
 416                              pcm,
 417                              nonzero);
 418
 419       for(i=0;i<2;i++)
 420         analysis("quant",frameno+i,pcm[i],framesize/2,1,0);
 421
 422       /* channel coupling / stereo quantization */
 423
 424       _vp_couple(&p_look,
 425                  &mapping_info,
 426                  pcm,
 427                  nonzero);
 428
 429       for(i=0;i<2;i++)
 430         analysis("coupled",frameno+i,pcm[i],framesize/2,1,0);
 431
 432       /* decoupling */
 433       for(i=mapping_info.coupling_steps-1;i>=0;i--){
 434         float *pcmM=pcm[mapping_info.coupling_mag[i]];
 435         float *pcmA=pcm[mapping_info.coupling_ang[i]];
 436
 437         for(j=0;j<framesize/2;j++){
 438           float mag=pcmM[j];
 439           float ang=pcmA[j];
 440
 441           if(mag>0)
 442             if(ang>0){
 443               pcmM[j]=mag;
 444               pcmA[j]=mag-ang;
 445             }else{
 446               pcmA[j]=mag;
 447               pcmM[j]=mag+ang;
 448             }
 449           else
 450             if(ang>0){
 451               pcmM[j]=mag;
 452               pcmA[j]=mag+ang;
 453             }else{
 454               pcmA[j]=mag;
 455               pcmM[j]=mag-ang;
 456             }
 457         }
 458       }
 459
 460       for(i=0;i<2;i++)
 461         analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0);
 462
 463       for(i=0;i<2;i++){
 464         float amp;
 465
 466         for(j=0;j<framesize/2;j++)
 467           pcm[i][j]*=flr[i][j];
 468
 469         analysis("final",frameno+i,pcm[i],framesize/2,1,1);
 470
 471         /* take it back to time */
 472         mdct_backward(&m_look,pcm[i],pcm[i]);
 473
 474         for(j=0;j<framesize/2;j++)
 475           out[i][j]+=pcm[i][j]*window[j];
 476
 477         analysis("out",frameno+i,out[i],framesize/2,0,0);
 478
 479
 480       }
 481
 482       /* write data.  Use the part of buffer we're about to shift out */
 483       for(i=0;i<2;i++){
 484         char  *ptr=buffer+i*2;
 485         float *mono=out[i];
 486         int flag=0;
 487         for(j=0;j<framesize/2;j++){
 488           int val=mono[j]*32767.;
 489           /* might as well guard against clipping */
 490           if(val>32767){
 491             if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
 492             flag=1;
 493             val=32767;
 494           }
 495           if(val<-32768){
 496             if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
 497             flag=1;
 498             val=-32768;
 499           }
 500           ptr[0]=val&0xff;
 501           ptr[1]=(val>>8)&0xff;
 502           ptr+=4;
 503         }
 504       }
 505
 506       fprintf(stderr,"*");
 507       fwrite(buffer,1,framesize*2,stdout);
 508       memmove(buffer,buffer2,framesize*2);
 509
 510       for(i=0;i<2;i++){
 511         for(j=0,k=framesize/2;j<framesize/2;j++,k++)
 512           out[i][j]=pcm[i][k]*window[k];
 513       }
 514       frameno+=2;
 515     }else
 516       eos=1;
 517   }
 518   fprintf(stderr,"average raw bits of entropy: %.03g/sample\n",acc/tot);
 519   fprintf(stderr,"average nonzero samples: %.03g/%d\n",nonz/tot*framesize/2,
 520           framesize/2);
 521   fprintf(stderr,"Done\n\n");
 522   return 0;
 523 }