vorbis/lib/psytune.c

/********************************************************************
 *                                                                  *
 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
 *                                                                  *
 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001             *
 * by the XIPHOPHORUS Company http://www.xiph.org/                  *

 ********************************************************************

 function: simple utility that runs audio through the psychoacoustics
           without encoding
 last mod: $Id: psytune.c,v 1.15 2001/05/27 06:44:00 xiphmont Exp $

 ********************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

#include "vorbis/codec.h"
#include "os.h"
#include "psy.h"
#include "mdct.h"
#include "smallft.h"
#include "window.h"
#include "scales.h"
#include "lpc.h"
#include "lsp.h"

static vorbis_info_psy _psy_set0={
  1,/*athp*/
  1,/*decayp*/

  -100.f,
  -140.f,

  8,

  /*     0  1  2   3   4   5   6   7   8   9  10  11  12  13  14  15   16   */
  /* x: 63 88 125 175 250 350 500 700 1k 1.4k 2k 2.8k 4k 5.6k 8k 11.5k 16k Hz */
  /* y: 0 10 20 30 40 50 60 70 80 90 100 dB */
   1,/* tonemaskp */
  /*  0   10   20   30   40   50   60   70   80   90   100 */
  {
   {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*63*/
   {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*88*/
   {-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f,-999.f}, /*125*/

   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*175*/
   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*250*/
   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*350*/
   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*500*/
   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*700*/

   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1000*/
   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1400*/
   {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2000*/
   {-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*2800*/
   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*4000*/
   {-35.f,-35.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*5600*/

   {-30.f,-30.f,-33.f,-35.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*8000*/
   {-30.f,-30.f,-33.f,-35.f,-35.f,-45.f,-50.f,-60.f,-70.f,-90.f,-100.f}, /*11500*/
   {-24.f,-24.f,-26.f,-32.f,-32.f,-42.f,-50.f,-60.f,-70.f,-90.f,-100.f}, /*16000*/

  },

  1,/* peakattp */
  {{-14.f,-16.f,-18.f,-19.f,-20.f,-21.f,-22.f,-22.f,-24.f,-24.f,-24.f},/*63*/
   {-14.f,-16.f,-18.f,-19.f,-20.f,-21.f,-22.f,-22.f,-24.f,-24.f,-24.f},/*88*/
   {-14.f,-16.f,-18.f,-19.f,-20.f,-21.f,-22.f,-22.f,-24.f,-24.f,-24.f},/*125*/
   {-10.f,-10.f,-10.f,-10.f,-16.f,-16.f,-18.f,-20.f,-24.f,-24.f,-24.f},/*175*/
   {-10.f,-10.f,-10.f,-10.f,-16.f,-16.f,-18.f,-20.f,-24.f,-24.f,-24.f},/*250*/
   {-10.f,-10.f,-10.f,-10.f,-16.f,-16.f,-18.f,-20.f,-22.f,-24.f,-24.f},/*350*/
   {-10.f,-10.f,-10.f,-10.f,-16.f,-16.f,-18.f,-20.f,-22.f,-24.f,-24.f},/*500*/
   {-10.f,-10.f,-10.f,-10.f,-14.f,-14.f,-16.f,-20.f,-22.f,-24.f,-24.f},/*700*/
   {-10.f,-10.f,-10.f,-10.f,-14.f,-14.f,-16.f,-20.f,-22.f,-24.f,-24.f},/*1000*/
   {-10.f,-10.f,-10.f,-10.f,-14.f,-14.f,-16.f,-20.f,-22.f,-24.f,-24.f},/*1400*/
   {-10.f,-10.f,-10.f,-10.f,-14.f,-14.f,-16.f,-20.f,-22.f,-24.f,-24.f},/*2000*/
   {-10.f,-10.f,-10.f,-12.f,-16.f,-16.f,-16.f,-20.f,-22.f,-24.f,-24.f},/*2400*/
   {-10.f,-10.f,-10.f,-12.f,-16.f,-16.f,-16.f,-20.f,-22.f,-24.f,-24.f},/*4000*/
   {-10.f,-10.f,-10.f,-12.f,-12.f,-14.f,-16.f,-18.f,-22.f,-24.f,-24.f},/*5600*/
   {-10.f,-10.f,-10.f,-10.f,-10.f,-14.f,-16.f,-18.f,-22.f,-24.f,-24.f},/*8000*/
   {-10.f,-10.f,-10.f,-10.f,-10.f,-14.f,-16.f,-18.f,-22.f,-24.f,-24.f},/*11500*/
   {-10.f,-10.f,-10.f,-10.f,-10.f,-12.f,-16.f,-18.f,-22.f,-24.f,-24.f},/*16000*/
  },

  1,/*noisemaskp */
  -24.f,  /* suppress any noise curve over maxspec+n */
  .5f,   /* low window */
  .5f,   /* high window */
  25,
  25,
  {.000f, 0.f, /*63*/
   .000f, 0.f, /*88*/
   .000f, 0.f, /*125*/
   .000f, 0.f, /*175*/
   .000f, 0.f, /*250*/
   .000f, 0.f, /*350*/
   .000f, 0.f, /*500*/
   .200f, 0.f, /*700*/
   .300f, 0.f, /*1000*/
   .400f, 0.f, /*1400*/
   .400f, 0.f, /*2000*/
   .400f, 0.f, /*2800*/
   .700f, 0.f, /*4000*/
   .850f, 0.f, /*5600*/
   .900f, 0.f, /*8000*/
   .900f, 0.f, /*11500*/
   .900f, 1.f, /*16000*/
  },
 
  95.f,  /* even decade + 5 is important; saves an rint() later in a
            tight loop) */
  -28.,

};

static int noisy=1;
void analysis(char *base,int i,float *v,int n,int bark,int dB){
  if(noisy){
    int j;
    FILE *of;
    char buffer[80];
    sprintf(buffer,"%s_%d.m",base,i);
    of=fopen(buffer,"w");

    for(j=0;j<n;j++){
      if(dB && v[j]==0)
	  fprintf(of,"\n\n");
      else{
	if(bark)
	  fprintf(of,"%g ",toBARK(22050.f*j/n));
	else
	  fprintf(of,"%g ",(float)j);
      
	if(dB){
	  fprintf(of,"%g\n",todB(fabs(v+j)));
	}else{
	  fprintf(of,"%g\n",v[j]);
	}
      }
    }
    fclose(of);
  }
}

long frameno=0;

/****************************************************************/

int main(int argc,char *argv[]){
  int eos=0;
  float nonz=0.f;
  float acc=0.f;
  float tot=0.f;
  float ampmax=-9999,newmax;

  int framesize=2048;
  int order=30;
  int map=256;
  float ampmax_att_per_sec=-10.;

  float *pcm[2],*out[2],*window,*lpc,*flr,*mask;
  signed char *buffer,*buffer2;
  mdct_lookup m_look;
  drft_lookup f_look;
  drft_lookup f_look2;
  vorbis_look_psy p_look;
  long i,j,k;

  int ath=0;
  int decayp=0;

  argv++;
  while(*argv){
    if(*argv[0]=='-'){
      /* option */
      if(argv[0][1]=='v'){
	noisy=0;
      }
      if(argv[0][1]=='o'){
	order=atoi(argv[0]+2);
      }
      if(argv[0][1]=='m'){
	map=atoi(argv[0]+2);
      }
    }else
      if(*argv[0]=='+'){
	/* option */
	if(argv[0][1]=='v'){
	  noisy=1;
	}
	if(argv[0][1]=='o'){
	  order=atoi(argv[0]+2);
	}
	if(argv[0][1]=='m'){
	  map=atoi(argv[0]+2);
	}
      }else
	framesize=atoi(argv[0]);
    argv++;
  }
  
  mask=_ogg_malloc(framesize*sizeof(float));
  pcm[0]=_ogg_malloc(framesize*sizeof(float));
  pcm[1]=_ogg_malloc(framesize*sizeof(float));
  out[0]=_ogg_calloc(framesize/2,sizeof(float));
  out[1]=_ogg_calloc(framesize/2,sizeof(float));
  flr=_ogg_malloc(framesize*sizeof(float));
  lpc=_ogg_malloc(order*sizeof(float));
  buffer=_ogg_malloc(framesize*4);
  buffer2=buffer+framesize*2;
  window=_vorbis_window(0,framesize,framesize/2,framesize/2);
  mdct_init(&m_look,framesize);
  drft_init(&f_look,framesize);
  drft_init(&f_look2,framesize/2);
  _vp_psy_init(&p_look,&_psy_set0,framesize/2,44100);

  for(i=0;i<P_BANDS;i++)
    for(j=0;j<P_LEVELS;j++)
      analysis("Ptonecurve",i*100+j,p_look.tonecurves[i][j],EHMER_MAX,0,0);

  /* we cheat on the WAV header; we just bypass 44 bytes and never
     verify that it matches 16bit/stereo/44.1kHz. */
  
  fread(buffer,1,44,stdin);
  fwrite(buffer,1,44,stdout);
  memset(buffer,0,framesize*2);

  analysis("window",0,window,framesize,0,0);

  fprintf(stderr,"Processing for frame size %d...\n",framesize);

  while(!eos){
    long bytes=fread(buffer2,1,framesize*2,stdin); 
    if(bytes<framesize*2)
      memset(buffer2+bytes,0,framesize*2-bytes);
    
    if(bytes!=0){

      /* uninterleave samples */
      for(i=0;i<framesize;i++){
        pcm[0][i]=((buffer[i*4+1]<<8)|
                      (0x00ff&(int)buffer[i*4]))/32768.f;
        pcm[1][i]=((buffer[i*4+3]<<8)|
		   (0x00ff&(int)buffer[i*4+2]))/32768.f;
      }
      
      {
	float secs=framesize/44100.;
	
	ampmax+=secs*ampmax_att_per_sec;
	if(ampmax<-9999)ampmax=-9999;
      }
      newmax=ampmax;

      for(i=0;i<2;i++){
	float amp;

	analysis("pre",frameno,pcm[i],framesize,0,0);
	memcpy(mask,pcm[i],sizeof(float)*framesize);
	
	/* do the psychacoustics */
	for(j=0;j<framesize;j++)
	  mask[j]=pcm[i][j]*=window[j];
	
	drft_forward(&f_look,mask);

	mask[0]/=(framesize/4.);
	for(j=1;j<framesize-1;j+=2)
	  mask[(j+1)>>1]=4*hypot(mask[j],mask[j+1])/framesize;

	mdct_forward(&m_look,pcm[i],pcm[i]);
	memcpy(mask+framesize/2,pcm[i],sizeof(float)*framesize/2);
	analysis("mdct",frameno,pcm[i],framesize/2,0,1);
	analysis("fft",frameno,mask,framesize/2,0,1);

	{
	  float ret;
	  ret=_vp_compute_mask(&p_look,mask,mask+framesize/2,flr,NULL,ampmax);
	  if(ret>newmax)newmax=ret;
	}

	analysis("mask",frameno,flr,framesize/2,0,0);

	mask[framesize-1]=0.;
	mask[0]=0.;
	for(j=1;j<framesize-1;j+=2){
	  mask[j]=todB(pcm[i]+((j+1)>>1));
	  mask[j+1]=0;
	}

	analysis("lfft",frameno,mask,framesize,0,0);
	drft_backward(&f_look,mask);

	analysis("cep",frameno,mask,framesize,0,0);
	analysis("logcep",frameno,mask,framesize,0,1);
	


	/*for(j=0;j<framesize/2;j++){
	  float val=fromdB(flr[j]);
	  int p=rint(pcm[i][j]/val);
	  pcm[i][j]=p*val;
	  }*/

	/*for(j=0;j<framesize/2;j++){
	  float val=todB(pcm[i]+j);
	  if(val+6.<flr[j])
	    pcm[i][j]=0.;
	    }*/

	for(j=0;j<framesize/2;j++){
	  float val=rint(todB(pcm[i]+j)/6);
	  if(pcm[i][j]>0)
	    pcm[i][j]=fromdB(val*6);
	  else
	    pcm[i][j]=-fromdB(val*6);
	}


	analysis("final",frameno,pcm[i],framesize/2,0,1);

	/* take it back to time */
	mdct_backward(&m_look,pcm[i],pcm[i]);
	for(j=0;j<framesize/2;j++)
	  out[i][j]+=pcm[i][j]*window[j];

	frameno++;
      }
      ampmax=newmax;
           
      /* write data.  Use the part of buffer we're about to shift out */
      for(i=0;i<2;i++){
	char  *ptr=buffer+i*2;
	float *mono=out[i];
	for(j=0;j<framesize/2;j++){
	  int val=mono[j]*32767.;
	  /* might as well guard against clipping */
	  if(val>32767)val=32767;
	  if(val<-32768)val=-32768;
	  ptr[0]=val&0xff;
	  ptr[1]=(val>>8)&0xff;
	  ptr+=4;
	}
      }
 
      fprintf(stderr,"*");
      fwrite(buffer,1,framesize*2,stdout);
      memmove(buffer,buffer2,framesize*2);

      for(i=0;i<2;i++){
	for(j=0,k=framesize/2;j<framesize/2;j++,k++)
	  out[i][j]=pcm[i][k]*window[k];
      }
    }else
      eos=1;
  }
  fprintf(stderr,"average raw bits of entropy: %.03g/sample\n",acc/tot);
  fprintf(stderr,"average nonzero samples: %.03g/%d\n",nonz/tot*framesize/2,
	  framesize/2);
  fprintf(stderr,"Done\n\n");
  return 0;
}