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/********************************************************************
* *
* THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
* PLEASE READ THESE TERMS DISTRIBUTING. *
* *
* THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
* by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
* http://www.xiph.org/ *
* *
********************************************************************
function: simple utility that runs audio through the psychoacoustics
without encoding
last mod: $Id: psytune.c,v 1.6.2.1 2000/08/31 09:00:01 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 "window.h"
#include "scales.h"
#include "lpc.h"
#include "lsp.h"
static vorbis_info_psy _psy_set0={
1,/*athp*/
1,/*decayp*/
1,/*smoothp*/
0,.2,
-100.,
-140.,
/* 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 */
{{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*63*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*88*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*125*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*175*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*250*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*350*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*500*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*700*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*1000*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*1400*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*2000*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*2800*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*4000*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*5600*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*8000*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*11500*/
{-40.,-40.,-40.,-40.,-40.,-50.,-60.,-70.,-80.,-90.,-100.}, /*16000*/
},
1,/* peakattp */
{{-14.,-16.,-18.,-19.,-20.,-21.,-22.,-22.,-22.,-22.,-22.}, /*63*/
{-14.,-16.,-18.,-19.,-20.,-21.,-22.,-22.,-22.,-22.,-22.}, /*88*/
{-14.,-16.,-18.,-19.,-20.,-21.,-22.,-22.,-22.,-22.,-22.}, /*125*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-18.,-20.}, /*8000*/
{ -7., -8., -9.,-10.,-10.,-11.,-12.,-13.,-15.,-16.,-17.}, /*8000*/
{ -6., -7., -9., -9., -9., -9.,-10.,-11.,-12.,-13.,-14.}, /*11500*/
{ -6., -6., -9., -9., -9., -9., -9., -9.,-10.,-11.,-12.}, /*16000*/
},
1,/*noisemaskp */
/* 0 10 20 30 40 50 60 70 80 90 100 */
{{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*63*/
{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*88*/
{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*125*/
{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*175*/
{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*250*/
{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*350*/
{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*350*/
{-99.,-99.,-99.,-99.,-99.,-99.,-99.,-199.,-199.,-199.,-199.}, /*350*/
{ -6., -6., -6., -6., -6., -6., -6., -6., -6., -6., -6.}, /*2000*/
{ -6., -6., -6., -6., -6., -6., -6., -6., -6., -6., -6.}, /*2000*/
{ -6., -6., -6., -6., -6., -6., -6., -6., -6., -6., -6.}, /*2000*/
{ -6., -6., -6., -6., -6., -6., -6., -6., -6., -6., -6.}, /*2800*/
{ -0., -0., -0., -0., -0., -0., -0., -0., -0., -0., -0.}, /*4000*/
{ 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.}, /*5600*/
{ 4., 4., 4., 4., 4., 4., 4., 4., 4., 4., 4.}, /*8000*/
{ 4., 4., 4., 4., 4., 4., 4., 4., 4., 4., 4.}, /*11500*/
{ 4., 4., 4., 4., 4., 4., 4., 4., 4., 4., 4.}, /*16000*/
},
110.,
-0, -.005, /* attack/decay control */
};
static int noisy=0;
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.*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);
}
}
typedef struct {
long n;
int ln;
int m;
int *linearmap;
vorbis_info_floor0 *vi;
lpc_lookup lpclook;
} vorbis_look_floor0;
extern float _curve_to_lpc(float *curve,float *lpc,vorbis_look_floor0 *l,
long frameno);
extern void _lsp_to_curve(float *curve,float *lpc,float amp,
vorbis_look_floor0 *l,char *name,long frameno);
long frameno=0;
/* hacked from floor0.c */
static void floorinit(vorbis_look_floor0 *look,int n,int m,int ln){
int j;
float scale;
look->m=m;
look->n=n;
look->ln=ln;
lpc_init(&look->lpclook,look->ln,look->m);
scale=look->ln/toBARK(22050.);
look->linearmap=malloc(look->n*sizeof(int));
for(j=0;j<look->n;j++){
int val=floor( toBARK(22050./n*j) *scale);
if(val>look->ln)val=look->ln;
look->linearmap[j]=val;
}
}
int main(int argc,char *argv[]){
int eos=0;
float nonz=0.;
float acc=0.;
float tot=0.;
int framesize=2048;
int order=32;
int map=256;
float *pcm[2],*out[2],*window,*decay[2],*lpc,*floor;
signed char *buffer,*buffer2;
mdct_lookup m_look;
vorbis_look_psy p_look;
long i,j,k;
vorbis_look_floor0 floorlook;
int ath=0;
int decayp=0;
argv++;
while(*argv){
if(*argv[0]=='-'){
/* option */
if(argv[0][1]=='v'){
noisy=0;
}
if(argv[0][1]=='A'){
ath=0;
}
if(argv[0][1]=='D'){
decayp=0;
}
if(argv[0][1]=='X'){
ath=0;
decayp=0;
}
}else
if(*argv[0]=='+'){
/* option */
if(argv[0][1]=='v'){
noisy=1;
}
if(argv[0][1]=='A'){
ath=1;
}
if(argv[0][1]=='D'){
decayp=1;
}
if(argv[0][1]=='X'){
ath=1;
decayp=1;
}
}else
framesize=atoi(argv[0]);
argv++;
}
pcm[0]=malloc(framesize*sizeof(float));
pcm[1]=malloc(framesize*sizeof(float));
out[0]=calloc(framesize/2,sizeof(float));
out[1]=calloc(framesize/2,sizeof(float));
decay[0]=calloc(framesize/2,sizeof(float));
decay[1]=calloc(framesize/2,sizeof(float));
floor=malloc(framesize*sizeof(float));
lpc=malloc(order*sizeof(float));
buffer=malloc(framesize*4);
buffer2=buffer+framesize*2;
window=_vorbis_window(0,framesize,framesize/2,framesize/2);
mdct_init(&m_look,framesize);
_vp_psy_init(&p_look,&_psy_set0,framesize/2,44100);
floorinit(&floorlook,framesize/2,order,map);
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,0,1);
/* 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.;
pcm[1][i]=((buffer[i*4+3]<<8)|
(0x00ff&(int)buffer[i*4+2]))/32768.;
}
for(i=0;i<2;i++){
float amp;
analysis("pre",frameno,pcm[i],framesize,0,0);
/* do the psychacoustics */
for(j=0;j<framesize;j++)
pcm[i][j]*=window[j];
mdct_forward(&m_look,pcm[i],pcm[i]);
analysis("mdct",frameno,pcm[i],framesize/2,1,1);
_vp_compute_mask(&p_look,pcm[i],floor,decay[i]);
analysis("prefloor",frameno,floor,framesize/2,1,1);
analysis("decay",frameno,decay[i],framesize/2,1,1);
for(j=0;j<framesize/2;j++)floor[j]=todB(floor[j])+150;
amp=_curve_to_lpc(floor,lpc,&floorlook,frameno);
vorbis_lpc_to_lsp(lpc,lpc,order);
_lsp_to_curve(floor,lpc,sqrt(amp),&floorlook,"Ffloor",frameno);
for(j=0;j<framesize/2;j++)floor[j]=fromdB(floor[j]-150);
analysis("floor",frameno,floor,framesize/2,1,1);
_vp_apply_floor(&p_look,pcm[i],floor);
/*r(j=0;j<framesize/2;j++)
if(fabs(pcm[i][j])<1.)pcm[i][j]=0;*/
analysis("quant",frameno,pcm[i],framesize/2,1,1);
/* re-add floor */
for(j=0;j<framesize/2;j++){
float val=rint(pcm[i][j]);
tot++;
if(val){
nonz++;
acc+=log(fabs(val)*2.+1.)/log(2);
pcm[i][j]=val*floor[j];
}else{
pcm[i][j]=0;
}
}
analysis("final",frameno,pcm[i],framesize/2,1,1);
/* 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++;
}
/* 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;
}
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