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  last mod: $Id$
  16
  17  ********************************************************************/
  18
  19 /* NB: this is dead code, retained purely for doc and reference value
  20        don't try to compile it */
  21
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <math.h>
  26
  27 #include "vorbis/codec.h"
  28 #include "codec_internal.h"
  29 #include "os.h"
  30 #include "misc.h"
  31 #include "psy.h"
  32 #include "mdct.h"
  33 #include "smallft.h"
  34 #include "window.h"
  35 #include "scales.h"
  36 #include "lpc.h"
  37 #include "lsp.h"
  38 #include "masking.h"
  39 #include "registry.h"
  40
  41 static vorbis_info_psy_global _psy_set0G={
  42   0,   /* decaydBpms */
  43   8,   /* lines per eighth octave */
  44
  45   /* thresh sample period, preecho clamp trigger threshhold, range, minenergy */
  46   256, {26.f,26.f,26.f,30.f}, {-90.f,-90.f,-90.f,-90.f}, -90.f,
  47   -6.f,
  48
  49   0,
  50
  51   0.,
  52   0.,
  53 };
  54
  55 static vp_part _vp_part0[]={
  56   {    1,9e10f, 9e10f,       1.f,9999.f},
  57   { 9999,  .75f, 9e10f,       .5f,9999.f},
  58 /*{ 9999, 1.5f, 9e10f,       .5f,9999.f},*/
  59   {   18,9e10f, 9e10f,       .5f,  30.f},
  60   { 9999,9e10f, 9e10f,       .5f,  30.f}
  61 };
  62
  63 static vp_couple _vp_couple0[]={
  64   {    1,  {9e10f,9e10f,0}, {   0.f,   0.f,0}, {   0.f, 0.f,0}, {0.f,0.f,0}},
  65   {   18,  {9e10f,9e10f,0}, {   0.f,   0.f,0}, {   0.f, 0.f,0}, {0.f,0.f,0}},
  66   { 9999,  {9e10f,9e10f,0}, {   0.f, 9e10f,0}, {   0.f,22.f,1}, {0.f,0.f,0}}
  67 };
  68
  69 static vorbis_info_psy _psy_set0={
  70   ATH_Bark_dB_lineaggressive,
  71
  72   -100.f,
  73   -140.f,
  74   6.f, /* floor master att */
  75
  76   /*     0  1  2   3   4   5   6   7   8   9  10  11  12  13  14  15   16   */
  77   /* x: 63 88 125 175 250 350 500 700 1k 1.4k 2k 2.8k 4k 5.6k 8k 11.5k 16k Hz */
  78   /* y: 0 10 20 30 40 50 60 70 80 90 100 dB */
  79    1,  /* tonemaskp */
  80   0.f, /* tone master att */
  81   /*  0   10   20   30   40   50   60   70   80   90   100 */
  82   {
  83    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*63*/
  84    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*88*/
  85    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*125*/
  86
  87    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*175*/
  88    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*250*/
  89    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*350*/
  90    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*500*/
  91    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*700*/
  92    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1000*/
  93    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1400*/
  94    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2000*/
  95    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2800*/
  96    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*4000*/
  97
  98    {-30.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*5600*/
  99
 100    {-30.f,-30.f,-33.f,-35.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*8000*/
 101    {-30.f,-30.f,-33.f,-35.f,-40.f,-45.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*11500*/
 102    {-24.f,-24.f,-26.f,-32.f,-32.f,-42.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*16000*/
 103
 104   },
 105
 106   1,/* peakattp */
 107   {{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*63*/
 108    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*88*/
 109    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*125*/
 110    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*175*/
 111    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*250*/
 112    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*350*/
 113    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*500*/
 114    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*700*/
 115    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1000*/
 116    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1400*/
 117    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2000*/
 118    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2800*/
 119    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*4000*/
 120    {-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*5600*/
 121    {-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*8000*/
 122    {-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*11500*/
 123    {-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*16000*/
 124   },
 125
 126   1,/*noisemaskp */
 127   -10.f,  /* suppress any noise curve over maxspec+n */
 128   .5f,   /* low window */
 129   .5f,   /* high window */
 130   10,
 131   10,
 132   25,
 133   {.000f, 0.f, /*63*/
 134    .000f, 0.f, /*88*/
 135    .000f, 0.f, /*125*/
 136    .000f, 0.f, /*175*/
 137    .000f, 0.f, /*250*/
 138    .000f, 0.f, /*350*/
 139    .000f, 0.f, /*500*/
 140    .000f, 0.f, /*700*/
 141    .000f, 0.f, /*1000*/
 142    .300f, 0.f, /*1400*/
 143    .300f, 0.f, /*2000*/
 144    .300f, 0.f, /*2800*/
 145    .500f, 0.f, /*4000*/
 146    .700f, 0.f, /*5600*/
 147    .850f, 0.f, /*8000*/
 148    .900f, 0.f, /*11500*/
 149    .900f, 1.f, /*16000*/
 150   },
 151
 152   95.f,  /* even decade + 5 is important; saves an rint() later in a
 153             tight loop) */
 154   -44.,
 155
 156   32,
 157   _vp_part0,_vp_couple0
 158 };
 159
 160 static vorbis_info_floor1 _floor_set0={1,
 161                                         {0},
 162
 163                                         {32},
 164                                         {0},
 165                                         {0},
 166                                         {{-1}},
 167
 168                                         2,
 169                                         {0,1024,
 170
 171                                          88,31,243,
 172
 173                                          14,54,143,460,
 174
 175                                          6,3,10, 22,18,26, 41,36,47,
 176                                          69,61,78, 112,99,126, 185,162,211,
 177                                          329,282,387, 672,553,825
 178                                          },
 179
 180                                         60,30,400,
 181                                         20,8,1,18.,
 182                                         20,600,
 183                                         960};
 184
 185
 186 static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}};
 187 static codec_setup_info codec_setup0={ {0,0},
 188                                        1,1,1,1,1,0,1,
 189                                        {NULL},
 190                                        {0},{&mapping_info},
 191                                        {0},{NULL},
 192                                        {1},{&_floor_set0},
 193                                        {2},{NULL},
 194                                        {NULL},
 195                                        {&_psy_set0},
 196                                        &_psy_set0G};
 197
 198 static int noisy=0;
 199 void analysis(char *base,int i,float *v,int n,int bark,int dB){
 200   if(noisy){
 201     int j;
 202     FILE *of;
 203     char buffer[80];
 204     sprintf(buffer,"%s_%d.m",base,i);
 205     of=fopen(buffer,"w");
 206
 207     for(j=0;j<n;j++){
 208       if(dB && v[j]==0)
 209           fprintf(of,"\n\n");
 210       else{
 211         if(bark)
 212           fprintf(of,"%g ",toBARK(22050.f*j/n));
 213         else
 214           fprintf(of,"%g ",(float)j);
 215
 216         if(dB){
 217           fprintf(of,"%g\n",todB(v+j));
 218         }else{
 219           fprintf(of,"%g\n",v[j]);
 220         }
 221       }
 222     }
 223     fclose(of);
 224   }
 225 }
 226
 227 long frameno=0;
 228
 229 /****************************************************************/
 230
 231 int main(int argc,char *argv[]){
 232   int eos=0;
 233   float nonz=0.f;
 234   float acc=0.f;
 235   float tot=0.f;
 236   float ampmax=-9999,newmax;
 237   float local_ampmax[2];
 238
 239   int framesize=2048;
 240   float ampmax_att_per_sec=-6.;
 241
 242   float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2];
 243   signed char *buffer,*buffer2;
 244   mdct_lookup m_look;
 245   drft_lookup f_look;
 246   vorbis_look_psy p_look;
 247   vorbis_look_psy_global *pg_look;
 248   vorbis_look_floor *floor_look;
 249   vorbis_info vi;
 250   long i,j,k;
 251
 252   int ath=0;
 253   int decayp=0;
 254
 255   argv++;
 256   while(*argv){
 257     if(*argv[0]=='-'){
 258       /* option */
 259       if(argv[0][1]=='v'){
 260         noisy=0;
 261       }
 262     }else
 263       if(*argv[0]=='+'){
 264         /* option */
 265         if(argv[0][1]=='v'){
 266           noisy=1;
 267         }
 268       }else
 269         framesize=atoi(argv[0]);
 270     argv++;
 271   }
 272
 273   vi.channels=2;
 274   vi.codec_setup=&codec_setup0;
 275
 276   pcm[0]=_ogg_malloc(framesize*sizeof(float));
 277   pcm[1]=_ogg_malloc(framesize*sizeof(float));
 278   out[0]=_ogg_calloc(framesize/2,sizeof(float));
 279   out[1]=_ogg_calloc(framesize/2,sizeof(float));
 280   work[0]=_ogg_calloc(framesize,sizeof(float));
 281   work[1]=_ogg_calloc(framesize,sizeof(float));
 282   flr[0]=_ogg_calloc(framesize/2,sizeof(float));
 283   flr[1]=_ogg_calloc(framesize/2,sizeof(float));
 284   buffer=_ogg_malloc(framesize*4);
 285   buffer2=buffer+framesize*2;
 286   window=_vorbis_window_create(0,framesize,framesize/2,framesize/2);
 287   mdct_init(&m_look,framesize);
 288   drft_init(&f_look,framesize);
 289   _vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100);
 290   pg_look=_vp_global_look(&vi);
 291   floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0);
 292
 293   /* we cheat on the WAV header; we just bypass 44 bytes and never
 294      verify that it matches 16bit/stereo/44.1kHz. */
 295
 296   fread(buffer,1,44,stdin);
 297   fwrite(buffer,1,44,stdout);
 298   memset(buffer,0,framesize*2);
 299
 300   analysis("window",0,window,framesize,0,0);
 301
 302   fprintf(stderr,"Processing for frame size %d...\n",framesize);
 303
 304   while(!eos){
 305     long bytes=fread(buffer2,1,framesize*2,stdin);
 306     if(bytes<framesize*2)
 307       memset(buffer2+bytes,0,framesize*2-bytes);
 308
 309     if(bytes!=0){
 310       int nonzero[2];
 311
 312       /* uninterleave samples */
 313       for(i=0;i<framesize;i++){
 314         pcm[0][i]=((buffer[i*4+1]<<8)|
 315                       (0x00ff&(int)buffer[i*4]))/32768.f;
 316         pcm[1][i]=((buffer[i*4+3]<<8)|
 317                    (0x00ff&(int)buffer[i*4+2]))/32768.f;
 318       }
 319
 320       {
 321         float secs=framesize/44100.;
 322
 323         ampmax+=secs*ampmax_att_per_sec;
 324         if(ampmax<-9999)ampmax=-9999;
 325       }
 326
 327       for(i=0;i<2;i++){
 328         float scale=4.f/framesize;
 329         float *fft=work[i];
 330         float *mdct=pcm[i];
 331         float *logmdct=mdct+framesize/2;
 332
 333         analysis("pre",frameno+i,pcm[i],framesize,0,0);
 334
 335         /* fft and mdct transforms  */
 336         for(j=0;j<framesize;j++)
 337           fft[j]=pcm[i][j]*=window[j];
 338
 339         drft_forward(&f_look,fft);
 340
 341         local_ampmax[i]=-9999.f;
 342         fft[0]*=scale;
 343         fft[0]=todB(fft);
 344         for(j=1;j<framesize-1;j+=2){
 345           float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
 346           temp=fft[(j+1)>>1]=todB(&temp);
 347           if(temp>local_ampmax[i])local_ampmax[i]=temp;
 348         }
 349         if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i];
 350
 351         mdct_forward(&m_look,pcm[i],mdct);
 352         for(j=0;j<framesize/2;j++)
 353           logmdct[j]=todB(mdct+j);
 354
 355         analysis("mdct",frameno+i,logmdct,framesize/2,1,0);
 356         analysis("fft",frameno+i,fft,framesize/2,1,0);
 357       }
 358
 359       for(i=0;i<2;i++){
 360         float amp;
 361         float *fft=work[i];
 362         float *logmax=fft;
 363         float *mdct=pcm[i];
 364         float *logmdct=mdct+framesize/2;
 365         float *mask=fft+framesize/2;
 366
 367         /* floor psychoacoustics */
 368         _vp_compute_mask(&p_look,
 369                          pg_look,
 370                          i,
 371                          fft,
 372                          logmdct,
 373                          mask,
 374                          ampmax,
 375                          local_ampmax[i],
 376                          framesize/2);
 377
 378         analysis("mask",frameno+i,mask,framesize/2,1,0);
 379
 380         {
 381           vorbis_block vb;
 382           vorbis_dsp_state vd;
 383           memset(&vd,0,sizeof(vd));
 384           vd.vi=&vi;
 385           vb.vd=&vd;
 386           vb.pcmend=framesize;
 387
 388           /* floor quantization/application */
 389           nonzero[i]=_floor_P[1]->forward(&vb,floor_look,
 390                                           mdct,
 391                                           logmdct,
 392                                           mask,
 393                                           logmax,
 394
 395                                           flr[i]);
 396         }
 397
 398         _vp_remove_floor(&p_look,
 399                          pg_look,
 400                          logmdct,
 401                          mdct,
 402                          flr[i],
 403                          pcm[i],
 404                          local_ampmax[i]);
 405
 406         for(j=0;j<framesize/2;j++)
 407           if(fabs(pcm[i][j])>1500)
 408             fprintf(stderr,"%ld ",frameno+i);
 409
 410         analysis("res",frameno+i,pcm[i],framesize/2,1,0);
 411         analysis("codedflr",frameno+i,flr[i],framesize/2,1,1);
 412       }
 413
 414       /* residue prequantization */
 415       _vp_partition_prequant(&p_look,
 416                              &vi,
 417                              pcm,
 418                              nonzero);
 419
 420       for(i=0;i<2;i++)
 421         analysis("quant",frameno+i,pcm[i],framesize/2,1,0);
 422
 423       /* channel coupling / stereo quantization */
 424
 425       _vp_couple(&p_look,
 426                  &mapping_info,
 427                  pcm,
 428                  nonzero);
 429
 430       for(i=0;i<2;i++)
 431         analysis("coupled",frameno+i,pcm[i],framesize/2,1,0);
 432
 433       /* decoupling */
 434       for(i=mapping_info.coupling_steps-1;i>=0;i--){
 435         float *pcmM=pcm[mapping_info.coupling_mag[i]];
 436         float *pcmA=pcm[mapping_info.coupling_ang[i]];
 437
 438         for(j=0;j<framesize/2;j++){
 439           float mag=pcmM[j];
 440           float ang=pcmA[j];
 441
 442           if(mag>0)
 443             if(ang>0){
 444               pcmM[j]=mag;
 445               pcmA[j]=mag-ang;
 446             }else{
 447               pcmA[j]=mag;
 448               pcmM[j]=mag+ang;
 449             }
 450           else
 451             if(ang>0){
 452               pcmM[j]=mag;
 453               pcmA[j]=mag+ang;
 454             }else{
 455               pcmA[j]=mag;
 456               pcmM[j]=mag-ang;
 457             }
 458         }
 459       }
 460
 461       for(i=0;i<2;i++)
 462         analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0);
 463
 464       for(i=0;i<2;i++){
 465         float amp;
 466
 467         for(j=0;j<framesize/2;j++)
 468           pcm[i][j]*=flr[i][j];
 469
 470         analysis("final",frameno+i,pcm[i],framesize/2,1,1);
 471
 472         /* take it back to time */
 473         mdct_backward(&m_look,pcm[i],pcm[i]);
 474
 475         for(j=0;j<framesize/2;j++)
 476           out[i][j]+=pcm[i][j]*window[j];
 477
 478         analysis("out",frameno+i,out[i],framesize/2,0,0);
 479
 480
 481       }
 482
 483       /* write data.  Use the part of buffer we're about to shift out */
 484       for(i=0;i<2;i++){
 485         char  *ptr=buffer+i*2;
 486         float *mono=out[i];
 487         int flag=0;
 488         for(j=0;j<framesize/2;j++){
 489           int val=mono[j]*32767.;
 490           /* might as well guard against clipping */
 491           if(val>32767){
 492             if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
 493             flag=1;
 494             val=32767;
 495           }
 496           if(val<-32768){
 497             if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
 498             flag=1;
 499             val=-32768;
 500           }
 501           ptr[0]=val&0xff;
 502           ptr[1]=(val>>8)&0xff;
 503           ptr+=4;
 504         }
 505       }
 506
 507       fprintf(stderr,"*");
 508       fwrite(buffer,1,framesize*2,stdout);
 509       memmove(buffer,buffer2,framesize*2);
 510
 511       for(i=0;i<2;i++){
 512         for(j=0,k=framesize/2;j<framesize/2;j++,k++)
 513           out[i][j]=pcm[i][k]*window[k];
 514       }
 515       frameno+=2;
 516     }else
 517       eos=1;
 518   }
 519   fprintf(stderr,"average raw bits of entropy: %.03g/sample\n",acc/tot);
 520   fprintf(stderr,"average nonzero samples: %.03g/%d\n",nonz/tot*framesize/2,
 521           framesize/2);
 522   fprintf(stderr,"Done\n\n");
 523   return 0;
 524 }