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: psytune.c 16037 2009-05-26 21:10:58Z xiphmont $
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
41static 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
55static 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
63static 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
69static 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
160static 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
186static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}};
187static 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
198static int noisy=0;
199void 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
227long frameno=0;
228
229/****************************************************************/
230
231int 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}
525