libvorbis-1.0.1/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 1994-2002             *
   9  * by the XIPHOPHORUS Company http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: simple utility that runs audio through the psychoacoustics
  14            without encoding
  15  last mod: $Id: psytune.c,v 1.20 2003/03/04 21:22:11 xiphmont Exp $
  16
  17  ********************************************************************/
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <math.h>
  23
  24 #include "vorbis/codec.h"
  25 #include "codec_internal.h"
  26 #include "os.h"
  27 #include "misc.h"
  28 #include "psy.h"
  29 #include "mdct.h"
  30 #include "smallft.h"
  31 #include "window.h"
  32 #include "scales.h"
  33 #include "lpc.h"
  34 #include "lsp.h"
  35 #include "masking.h"
  36 #include "registry.h"
  37
  38 static vorbis_info_psy_global _psy_set0G={
  39   0,   /* decaydBpms */
  40   8,   /* lines per eighth octave */
  41
  42   /* thresh sample period, preecho clamp trigger threshhold, range, minenergy */
  43   256, {26.f,26.f,26.f,30.f}, {-90.f,-90.f,-90.f,-90.f}, -90.f,
  44   -6.f,
  45
  46   0,
  47
  48   0.,
  49   0.,
  50 };
  51
  52 static vp_part _vp_part0[]={
  53   {    1,9e10f, 9e10f,       1.f,9999.f},
  54   { 9999,  .75f, 9e10f,       .5f,9999.f},
  55 /*{ 9999, 1.5f, 9e10f,       .5f,9999.f},*/
  56   {   18,9e10f, 9e10f,       .5f,  30.f},
  57   { 9999,9e10f, 9e10f,       .5f,  30.f}
  58 };
  59
  60 static vp_couple _vp_couple0[]={
  61   {    1,  {9e10f,9e10f,0}, {   0.f,   0.f,0}, {   0.f, 0.f,0}, {0.f,0.f,0}},
  62   {   18,  {9e10f,9e10f,0}, {   0.f,   0.f,0}, {   0.f, 0.f,0}, {0.f,0.f,0}},
  63   { 9999,  {9e10f,9e10f,0}, {   0.f, 9e10f,0}, {   0.f,22.f,1}, {0.f,0.f,0}}
  64 };
  65
  66 static vorbis_info_psy _psy_set0={
  67   ATH_Bark_dB_lineaggressive,
  68
  69   -100.f,
  70   -140.f,
  71   6.f, /* floor master att */
  72
  73   /*     0  1  2   3   4   5   6   7   8   9  10  11  12  13  14  15   16   */
  74   /* x: 63 88 125 175 250 350 500 700 1k 1.4k 2k 2.8k 4k 5.6k 8k 11.5k 16k Hz */
  75   /* y: 0 10 20 30 40 50 60 70 80 90 100 dB */
  76    1,  /* tonemaskp */
  77   0.f, /* tone master att */
  78   /*  0   10   20   30   40   50   60   70   80   90   100 */
  79   {
  80    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*63*/
  81    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*88*/
  82    {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*125*/
  83
  84    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*175*/
  85    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*250*/
  86    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*350*/
  87    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*500*/
  88    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*700*/
  89    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1000*/
  90    {-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1400*/
  91    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2000*/
  92    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2800*/
  93    {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*4000*/
  94
  95    {-30.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*5600*/
  96
  97    {-30.f,-30.f,-33.f,-35.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*8000*/
  98    {-30.f,-30.f,-33.f,-35.f,-40.f,-45.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*11500*/
  99    {-24.f,-24.f,-26.f,-32.f,-32.f,-42.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*16000*/
 100
 101   },
 102
 103   1,/* peakattp */
 104   {{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*63*/
 105    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*88*/
 106    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*125*/
 107    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*175*/
 108    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*250*/
 109    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*350*/
 110    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*500*/
 111    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*700*/
 112    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1000*/
 113    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1400*/
 114    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2000*/
 115    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2800*/
 116    {-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*4000*/
 117    {-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*5600*/
 118    {-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*8000*/
 119    {-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*11500*/
 120    {-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*16000*/
 121   },
 122
 123   1,/*noisemaskp */
 124   -10.f,  /* suppress any noise curve over maxspec+n */
 125   .5f,   /* low window */
 126   .5f,   /* high window */
 127   10,
 128   10,
 129   25,
 130   {.000f, 0.f, /*63*/
 131    .000f, 0.f, /*88*/
 132    .000f, 0.f, /*125*/
 133    .000f, 0.f, /*175*/
 134    .000f, 0.f, /*250*/
 135    .000f, 0.f, /*350*/
 136    .000f, 0.f, /*500*/
 137    .000f, 0.f, /*700*/
 138    .000f, 0.f, /*1000*/
 139    .300f, 0.f, /*1400*/
 140    .300f, 0.f, /*2000*/
 141    .300f, 0.f, /*2800*/
 142    .500f, 0.f, /*4000*/
 143    .700f, 0.f, /*5600*/
 144    .850f, 0.f, /*8000*/
 145    .900f, 0.f, /*11500*/
 146    .900f, 1.f, /*16000*/
 147   },
 148
 149   95.f,  /* even decade + 5 is important; saves an rint() later in a
 150             tight loop) */
 151   -44.,
 152
 153   32,
 154   _vp_part0,_vp_couple0
 155 };
 156
 157 static vorbis_info_floor1 _floor_set0={1,
 158                                         {0},
 159
 160                                         {32},
 161                                         {0},
 162                                         {0},
 163                                         {{-1}},
 164
 165                                         2,
 166                                         {0,1024,
 167
 168                                          88,31,243,
 169
 170                                          14,54,143,460,
 171
 172                                          6,3,10, 22,18,26, 41,36,47,
 173                                          69,61,78, 112,99,126, 185,162,211,
 174                                          329,282,387, 672,553,825
 175                                          },
 176
 177                                         60,30,400,
 178                                         20,8,1,18.,
 179                                         20,600,
 180                                         960};
 181
 182
 183 static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}};
 184 static codec_setup_info codec_setup0={ {0,0},
 185                                        1,1,1,1,1,0,1,
 186                                        {NULL},
 187                                        {0},{&mapping_info},
 188                                        {0},{NULL},
 189                                        {1},{&_floor_set0},
 190                                        {2},{NULL},
 191                                        {NULL},
 192                                        {&_psy_set0},
 193                                        &_psy_set0G};
 194
 195 static int noisy=0;
 196 void analysis(char *base,int i,float *v,int n,int bark,int dB){
 197   if(noisy){
 198     int j;
 199     FILE *of;
 200     char buffer[80];
 201     sprintf(buffer,"%s_%d.m",base,i);
 202     of=fopen(buffer,"w");
 203
 204     for(j=0;j<n;j++){
 205       if(dB && v[j]==0)
 206           fprintf(of,"\n\n");
 207       else{
 208         if(bark)
 209           fprintf(of,"%g ",toBARK(22050.f*j/n));
 210         else
 211           fprintf(of,"%g ",(float)j);
 212
 213         if(dB){
 214           fprintf(of,"%g\n",todB(v+j));
 215         }else{
 216           fprintf(of,"%g\n",v[j]);
 217         }
 218       }
 219     }
 220     fclose(of);
 221   }
 222 }
 223
 224 long frameno=0;
 225
 226 /****************************************************************/
 227
 228 int main(int argc,char *argv[]){
 229   int eos=0;
 230   float nonz=0.f;
 231   float acc=0.f;
 232   float tot=0.f;
 233   float ampmax=-9999,newmax;
 234   float local_ampmax[2];
 235
 236   int framesize=2048;
 237   float ampmax_att_per_sec=-6.;
 238
 239   float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2];
 240   signed char *buffer,*buffer2;
 241   mdct_lookup m_look;
 242   drft_lookup f_look;
 243   vorbis_look_psy p_look;
 244   vorbis_look_psy_global *pg_look;
 245   vorbis_look_floor *floor_look;
 246   vorbis_info vi;
 247   long i,j,k;
 248
 249   int ath=0;
 250   int decayp=0;
 251
 252   argv++;
 253   while(*argv){
 254     if(*argv[0]=='-'){
 255       /* option */
 256       if(argv[0][1]=='v'){
 257         noisy=0;
 258       }
 259     }else
 260       if(*argv[0]=='+'){
 261         /* option */
 262         if(argv[0][1]=='v'){
 263           noisy=1;
 264         }
 265       }else
 266         framesize=atoi(argv[0]);
 267     argv++;
 268   }
 269
 270   vi.channels=2;
 271   vi.codec_setup=&codec_setup0;
 272
 273   pcm[0]=_ogg_malloc(framesize*sizeof(float));
 274   pcm[1]=_ogg_malloc(framesize*sizeof(float));
 275   out[0]=_ogg_calloc(framesize/2,sizeof(float));
 276   out[1]=_ogg_calloc(framesize/2,sizeof(float));
 277   work[0]=_ogg_calloc(framesize,sizeof(float));
 278   work[1]=_ogg_calloc(framesize,sizeof(float));
 279   flr[0]=_ogg_calloc(framesize/2,sizeof(float));
 280   flr[1]=_ogg_calloc(framesize/2,sizeof(float));
 281   buffer=_ogg_malloc(framesize*4);
 282   buffer2=buffer+framesize*2;
 283   window=_vorbis_window_create(0,framesize,framesize/2,framesize/2);
 284   mdct_init(&m_look,framesize);
 285   drft_init(&f_look,framesize);
 286   _vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100);
 287   pg_look=_vp_global_look(&vi);
 288   floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0);
 289
 290   /* we cheat on the WAV header; we just bypass 44 bytes and never
 291      verify that it matches 16bit/stereo/44.1kHz. */
 292
 293   fread(buffer,1,44,stdin);
 294   fwrite(buffer,1,44,stdout);
 295   memset(buffer,0,framesize*2);
 296
 297   analysis("window",0,window,framesize,0,0);
 298
 299   fprintf(stderr,"Processing for frame size %d...\n",framesize);
 300
 301   while(!eos){
 302     long bytes=fread(buffer2,1,framesize*2,stdin);
 303     if(bytes<framesize*2)
 304       memset(buffer2+bytes,0,framesize*2-bytes);
 305
 306     if(bytes!=0){
 307       int nonzero[2];
 308
 309       /* uninterleave samples */
 310       for(i=0;i<framesize;i++){
 311         pcm[0][i]=((buffer[i*4+1]<<8)|
 312                       (0x00ff&(int)buffer[i*4]))/32768.f;
 313         pcm[1][i]=((buffer[i*4+3]<<8)|
 314                    (0x00ff&(int)buffer[i*4+2]))/32768.f;
 315       }
 316
 317       {
 318         float secs=framesize/44100.;
 319
 320         ampmax+=secs*ampmax_att_per_sec;
 321         if(ampmax<-9999)ampmax=-9999;
 322       }
 323
 324       for(i=0;i<2;i++){
 325         float scale=4.f/framesize;
 326         float *fft=work[i];
 327         float *mdct=pcm[i];
 328         float *logmdct=mdct+framesize/2;
 329
 330         analysis("pre",frameno+i,pcm[i],framesize,0,0);
 331
 332         /* fft and mdct transforms  */
 333         for(j=0;j<framesize;j++)
 334           fft[j]=pcm[i][j]*=window[j];
 335
 336         drft_forward(&f_look,fft);
 337
 338         local_ampmax[i]=-9999.f;
 339         fft[0]*=scale;
 340         fft[0]=todB(fft);
 341         for(j=1;j<framesize-1;j+=2){
 342           float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
 343           temp=fft[(j+1)>>1]=todB(&temp);
 344           if(temp>local_ampmax[i])local_ampmax[i]=temp;
 345         }
 346         if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i];
 347
 348         mdct_forward(&m_look,pcm[i],mdct);
 349         for(j=0;j<framesize/2;j++)
 350           logmdct[j]=todB(mdct+j);
 351
 352         analysis("mdct",frameno+i,logmdct,framesize/2,1,0);
 353         analysis("fft",frameno+i,fft,framesize/2,1,0);
 354       }
 355
 356       for(i=0;i<2;i++){
 357         float amp;
 358         float *fft=work[i];
 359         float *logmax=fft;
 360         float *mdct=pcm[i];
 361         float *logmdct=mdct+framesize/2;
 362         float *mask=fft+framesize/2;
 363
 364         /* floor psychoacoustics */
 365         _vp_compute_mask(&p_look,
 366                          pg_look,
 367                          i,
 368                          fft,
 369                          logmdct,
 370                          mask,
 371                          ampmax,
 372                          local_ampmax[i],
 373                          framesize/2);
 374
 375         analysis("mask",frameno+i,mask,framesize/2,1,0);
 376
 377         {
 378           vorbis_block vb;
 379           vorbis_dsp_state vd;
 380           memset(&vd,0,sizeof(vd));
 381           vd.vi=&vi;
 382           vb.vd=&vd;
 383           vb.pcmend=framesize;
 384
 385           /* floor quantization/application */
 386           nonzero[i]=_floor_P[1]->forward(&vb,floor_look,
 387                                           mdct,
 388                                           logmdct,
 389                                           mask,
 390                                           logmax,
 391
 392                                           flr[i]);
 393         }
 394
 395         _vp_remove_floor(&p_look,
 396                          pg_look,
 397                          logmdct,
 398                          mdct,
 399                          flr[i],
 400                          pcm[i],
 401                          local_ampmax[i]);
 402
 403         for(j=0;j<framesize/2;j++)
 404           if(fabs(pcm[i][j])>1500)
 405             fprintf(stderr,"%ld ",frameno+i);
 406
 407         analysis("res",frameno+i,pcm[i],framesize/2,1,0);
 408         analysis("codedflr",frameno+i,flr[i],framesize/2,1,1);
 409       }
 410
 411       /* residue prequantization */
 412       _vp_partition_prequant(&p_look,
 413                              &vi,
 414                              pcm,
 415                              nonzero);
 416
 417       for(i=0;i<2;i++)
 418         analysis("quant",frameno+i,pcm[i],framesize/2,1,0);
 419
 420       /* channel coupling / stereo quantization */
 421
 422       _vp_couple(&p_look,
 423                  &mapping_info,
 424                  pcm,
 425                  nonzero);
 426
 427       for(i=0;i<2;i++)
 428         analysis("coupled",frameno+i,pcm[i],framesize/2,1,0);
 429
 430       /* decoupling */
 431       for(i=mapping_info.coupling_steps-1;i>=0;i--){
 432         float *pcmM=pcm[mapping_info.coupling_mag[i]];
 433         float *pcmA=pcm[mapping_info.coupling_ang[i]];
 434
 435         for(j=0;j<framesize/2;j++){
 436           float mag=pcmM[j];
 437           float ang=pcmA[j];
 438
 439           if(mag>0)
 440             if(ang>0){
 441               pcmM[j]=mag;
 442               pcmA[j]=mag-ang;
 443             }else{
 444               pcmA[j]=mag;
 445               pcmM[j]=mag+ang;
 446             }
 447           else
 448             if(ang>0){
 449               pcmM[j]=mag;
 450               pcmA[j]=mag+ang;
 451             }else{
 452               pcmA[j]=mag;
 453               pcmM[j]=mag-ang;
 454             }
 455         }
 456       }
 457
 458       for(i=0;i<2;i++)
 459         analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0);
 460
 461       for(i=0;i<2;i++){
 462         float amp;
 463
 464         for(j=0;j<framesize/2;j++)
 465           pcm[i][j]*=flr[i][j];
 466
 467         analysis("final",frameno+i,pcm[i],framesize/2,1,1);
 468
 469         /* take it back to time */
 470         mdct_backward(&m_look,pcm[i],pcm[i]);
 471
 472         for(j=0;j<framesize/2;j++)
 473           out[i][j]+=pcm[i][j]*window[j];
 474
 475         analysis("out",frameno+i,out[i],framesize/2,0,0);
 476
 477
 478       }
 479
 480       /* write data.  Use the part of buffer we're about to shift out */
 481       for(i=0;i<2;i++){
 482         char  *ptr=buffer+i*2;
 483         float *mono=out[i];
 484         int flag=0;
 485         for(j=0;j<framesize/2;j++){
 486           int val=mono[j]*32767.;
 487           /* might as well guard against clipping */
 488           if(val>32767){
 489             if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
 490             flag=1;
 491             val=32767;
 492           }
 493           if(val<-32768){
 494             if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
 495             flag=1;
 496             val=-32768;
 497           }
 498           ptr[0]=val&0xff;
 499           ptr[1]=(val>>8)&0xff;
 500           ptr+=4;
 501         }
 502       }
 503
 504       fprintf(stderr,"*");
 505       fwrite(buffer,1,framesize*2,stdout);
 506       memmove(buffer,buffer2,framesize*2);
 507
 508       for(i=0;i<2;i++){
 509         for(j=0,k=framesize/2;j<framesize/2;j++,k++)
 510           out[i][j]=pcm[i][k]*window[k];
 511       }
 512       frameno+=2;
 513     }else
 514       eos=1;
 515   }
 516   fprintf(stderr,"average raw bits of entropy: %.03g/sample\n",acc/tot);
 517   fprintf(stderr,"average nonzero samples: %.03g/%d\n",nonz/tot*framesize/2,
 518           framesize/2);
 519   fprintf(stderr,"Done\n\n");
 520   return 0;
 521 }