ref: bf645afaac246967b9590ae7463f243c11d97480
dir: /sys/src/cmd/audio/libvorbis/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 1994-2007 *
* by the Xiph.Org Foundation https://xiph.org/ *
* *
********************************************************************
function: simple utility that runs audio through the psychoacoustics
without encoding
********************************************************************/
/* NB: this is dead code, retained purely for doc and reference value
don't try to compile it */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "vorbis/codec.h"
#include "codec_internal.h"
#include "os.h"
#include "misc.h"
#include "psy.h"
#include "mdct.h"
#include "smallft.h"
#include "window.h"
#include "scales.h"
#include "lpc.h"
#include "lsp.h"
#include "masking.h"
#include "registry.h"
static vorbis_info_psy_global _psy_set0G={
0, /* decaydBpms */
8, /* lines per eighth octave */
/* thresh sample period, preecho clamp trigger threshhold, range, minenergy */
256, {26.f,26.f,26.f,30.f}, {-90.f,-90.f,-90.f,-90.f}, -90.f,
-6.f,
0,
0.,
0.,
};
static vp_part _vp_part0[]={
{ 1,9e10f, 9e10f, 1.f,9999.f},
{ 9999, .75f, 9e10f, .5f,9999.f},
/*{ 9999, 1.5f, 9e10f, .5f,9999.f},*/
{ 18,9e10f, 9e10f, .5f, 30.f},
{ 9999,9e10f, 9e10f, .5f, 30.f}
};
static vp_couple _vp_couple0[]={
{ 1, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}},
{ 18, {9e10f,9e10f,0}, { 0.f, 0.f,0}, { 0.f, 0.f,0}, {0.f,0.f,0}},
{ 9999, {9e10f,9e10f,0}, { 0.f, 9e10f,0}, { 0.f,22.f,1}, {0.f,0.f,0}}
};
static vorbis_info_psy _psy_set0={
ATH_Bark_dB_lineaggressive,
-100.f,
-140.f,
6.f, /* floor master att */
/* 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.f, /* tone master att */
/* 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*/
{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*175*/
{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*250*/
{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*350*/
{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*500*/
{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*700*/
{-30.f,-30.f,-35.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*1000*/
{-30.f,-30.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*/
{-40.f,-40.f,-40.f,-40.f,-40.f,-50.f,-60.f,-70.f,-80.f,-90.f,-100.f}, /*4000*/
{-30.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,-40.f,-45.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*11500*/
{-24.f,-24.f,-26.f,-32.f,-32.f,-42.f,-50.f,-60.f,-70.f,-85.f,-100.f}, /*16000*/
},
1,/* peakattp */
{{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*63*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*88*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*125*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*175*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*250*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*350*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*500*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*700*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1000*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*1400*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2000*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*2800*/
{-14.f,-20.f,-20.f,-20.f,-26.f,-32.f,-40.f,-40.f,-40.f,-40.f,-40.f},/*4000*/
{-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*5600*/
{-10.f,-12.f,-14.f,-16.f,-16.f,-20.f,-24.f,-30.f,-32.f,-40.f,-40.f},/*8000*/
{-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*11500*/
{-10.f,-10.f,-10.f,-12.f,-14.f,-18.f,-22.f,-28.f,-32.f,-40.f,-40.f},/*16000*/
},
1,/*noisemaskp */
-10.f, /* suppress any noise curve over maxspec+n */
.5f, /* low window */
.5f, /* high window */
10,
10,
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*/
.000f, 0.f, /*700*/
.000f, 0.f, /*1000*/
.300f, 0.f, /*1400*/
.300f, 0.f, /*2000*/
.300f, 0.f, /*2800*/
.500f, 0.f, /*4000*/
.700f, 0.f, /*5600*/
.850f, 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) */
-44.,
32,
_vp_part0,_vp_couple0
};
static vorbis_info_floor1 _floor_set0={1,
{0},
{32},
{0},
{0},
{{-1}},
2,
{0,1024,
88,31,243,
14,54,143,460,
6,3,10, 22,18,26, 41,36,47,
69,61,78, 112,99,126, 185,162,211,
329,282,387, 672,553,825
},
60,30,400,
20,8,1,18.,
20,600,
960};
static vorbis_info_mapping0 mapping_info={1,{0,1},{0},{0},{0},0, 1, {0},{1}};
static codec_setup_info codec_setup0={ {0,0},
1,1,1,1,1,0,1,
{NULL},
{0},{&mapping_info},
{0},{NULL},
{1},{&_floor_set0},
{2},{NULL},
{NULL},
{&_psy_set0},
&_psy_set0G};
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.f*j/n));
else
fprintf(of,"%g ",(float)j);
if(dB){
fprintf(of,"%g\n",todB(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;
float local_ampmax[2];
int framesize=2048;
float ampmax_att_per_sec=-6.;
float *pcm[2],*out[2],*window,*flr[2],*mask[2],*work[2];
signed char *buffer,*buffer2;
mdct_lookup m_look;
drft_lookup f_look;
vorbis_look_psy p_look;
vorbis_look_psy_global *pg_look;
vorbis_look_floor *floor_look;
vorbis_info vi;
long i,j,k;
int ath=0;
int decayp=0;
argv++;
while(*argv){
if(*argv[0]=='-'){
/* option */
if(argv[0][1]=='v'){
noisy=0;
}
}else
if(*argv[0]=='+'){
/* option */
if(argv[0][1]=='v'){
noisy=1;
}
}else
framesize=atoi(argv[0]);
argv++;
}
vi.channels=2;
vi.codec_setup=&codec_setup0;
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));
work[0]=_ogg_calloc(framesize,sizeof(float));
work[1]=_ogg_calloc(framesize,sizeof(float));
flr[0]=_ogg_calloc(framesize/2,sizeof(float));
flr[1]=_ogg_calloc(framesize/2,sizeof(float));
buffer=_ogg_malloc(framesize*4);
buffer2=buffer+framesize*2;
window=_vorbis_window_create(0,framesize,framesize/2,framesize/2);
mdct_init(&m_look,framesize);
drft_init(&f_look,framesize);
_vp_psy_init(&p_look,&_psy_set0,&_psy_set0G,framesize/2,44100);
pg_look=_vp_global_look(&vi);
floor_look=_floor_P[1]->look(NULL,NULL,&_floor_set0);
/* 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){
int nonzero[2];
/* 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;
}
for(i=0;i<2;i++){
float scale=4.f/framesize;
float *fft=work[i];
float *mdct=pcm[i];
float *logmdct=mdct+framesize/2;
analysis("pre",frameno+i,pcm[i],framesize,0,0);
/* fft and mdct transforms */
for(j=0;j<framesize;j++)
fft[j]=pcm[i][j]*=window[j];
drft_forward(&f_look,fft);
local_ampmax[i]=-9999.f;
fft[0]*=scale;
fft[0]=todB(fft);
for(j=1;j<framesize-1;j+=2){
float temp=scale*FAST_HYPOT(fft[j],fft[j+1]);
temp=fft[(j+1)>>1]=todB(&temp);
if(temp>local_ampmax[i])local_ampmax[i]=temp;
}
if(local_ampmax[i]>ampmax)ampmax=local_ampmax[i];
mdct_forward(&m_look,pcm[i],mdct);
for(j=0;j<framesize/2;j++)
logmdct[j]=todB(mdct+j);
analysis("mdct",frameno+i,logmdct,framesize/2,1,0);
analysis("fft",frameno+i,fft,framesize/2,1,0);
}
for(i=0;i<2;i++){
float amp;
float *fft=work[i];
float *logmax=fft;
float *mdct=pcm[i];
float *logmdct=mdct+framesize/2;
float *mask=fft+framesize/2;
/* floor psychoacoustics */
_vp_compute_mask(&p_look,
pg_look,
i,
fft,
logmdct,
mask,
ampmax,
local_ampmax[i],
framesize/2);
analysis("mask",frameno+i,mask,framesize/2,1,0);
{
vorbis_block vb;
vorbis_dsp_state vd;
memset(&vd,0,sizeof(vd));
vd.vi=&vi;
vb.vd=&vd;
vb.pcmend=framesize;
/* floor quantization/application */
nonzero[i]=_floor_P[1]->forward(&vb,floor_look,
mdct,
logmdct,
mask,
logmax,
flr[i]);
}
_vp_remove_floor(&p_look,
pg_look,
logmdct,
mdct,
flr[i],
pcm[i],
local_ampmax[i]);
for(j=0;j<framesize/2;j++)
if(fabs(pcm[i][j])>1500)
fprintf(stderr,"%ld ",frameno+i);
analysis("res",frameno+i,pcm[i],framesize/2,1,0);
analysis("codedflr",frameno+i,flr[i],framesize/2,1,1);
}
/* residue prequantization */
_vp_partition_prequant(&p_look,
&vi,
pcm,
nonzero);
for(i=0;i<2;i++)
analysis("quant",frameno+i,pcm[i],framesize/2,1,0);
/* channel coupling / stereo quantization */
_vp_couple(&p_look,
&mapping_info,
pcm,
nonzero);
for(i=0;i<2;i++)
analysis("coupled",frameno+i,pcm[i],framesize/2,1,0);
/* decoupling */
for(i=mapping_info.coupling_steps-1;i>=0;i--){
float *pcmM=pcm[mapping_info.coupling_mag[i]];
float *pcmA=pcm[mapping_info.coupling_ang[i]];
for(j=0;j<framesize/2;j++){
float mag=pcmM[j];
float ang=pcmA[j];
if(mag>0)
if(ang>0){
pcmM[j]=mag;
pcmA[j]=mag-ang;
}else{
pcmA[j]=mag;
pcmM[j]=mag+ang;
}
else
if(ang>0){
pcmM[j]=mag;
pcmA[j]=mag+ang;
}else{
pcmA[j]=mag;
pcmM[j]=mag-ang;
}
}
}
for(i=0;i<2;i++)
analysis("decoupled",frameno+i,pcm[i],framesize/2,1,0);
for(i=0;i<2;i++){
float amp;
for(j=0;j<framesize/2;j++)
pcm[i][j]*=flr[i][j];
analysis("final",frameno+i,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];
analysis("out",frameno+i,out[i],framesize/2,0,0);
}
/* 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];
int flag=0;
for(j=0;j<framesize/2;j++){
int val=mono[j]*32767.;
/* might as well guard against clipping */
if(val>32767){
if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
flag=1;
val=32767;
}
if(val<-32768){
if(!flag)fprintf(stderr,"clipping in frame %ld ",frameno+i);
flag=1;
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];
}
frameno+=2;
}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;
}