* 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 *
+ * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: psychoacoustics not including preecho
- last mod: $Id$
********************************************************************/
#include "misc.h"
#define NEGINF -9999.f
-static double stereo_threshholds[]={0.0, .5, 1.0, 1.5, 2.5, 4.5, 8.5, 16.5, 9e10};
-static double stereo_threshholds_limited[]={0.0, .5, 1.0, 1.5, 2.0, 2.5, 4.5, 8.5, 9e10};
+static const double stereo_threshholds[]={0.0, .5, 1.0, 1.5, 2.5, 4.5, 8.5, 16.5, 9e10};
+static const double stereo_threshholds_limited[]={0.0, .5, 1.0, 1.5, 2.0, 2.5, 4.5, 8.5, 9e10};
vorbis_look_psy_global *_vp_global_look(vorbis_info *vi){
codec_setup_info *ci=vi->codec_setup;
}
static void min_curve(float *c,
- float *c2){
- int i;
+ float *c2){
+ int i;
for(i=0;i<EHMER_MAX;i++)if(c2[i]<c[i])c[i]=c2[i];
}
static void max_curve(float *c,
- float *c2){
- int i;
+ float *c2){
+ int i;
for(i=0;i<EHMER_MAX;i++)if(c2[i]>c[i])c[i]=c2[i];
}
}
static float ***setup_tone_curves(float curveatt_dB[P_BANDS],float binHz,int n,
- float center_boost, float center_decay_rate){
+ float center_boost, float center_decay_rate){
int i,j,k,m;
float ath[EHMER_MAX];
float workc[P_BANDS][P_LEVELS][EHMER_MAX];
curve limiting (last step). */
/* A half-band's settings must be valid over the whole band, and
- it's better to mask too little than too much */
+ it's better to mask too little than too much */
int ath_offset=i*4;
for(j=0;j<EHMER_MAX;j++){
float min=999.;
for(k=0;k<4;k++)
- if(j+k+ath_offset<MAX_ATH){
- if(min>ATH[j+k+ath_offset])min=ATH[j+k+ath_offset];
- }else{
- if(min>ATH[MAX_ATH-1])min=ATH[MAX_ATH-1];
- }
+ if(j+k+ath_offset<MAX_ATH){
+ if(min>ATH[j+k+ath_offset])min=ATH[j+k+ath_offset];
+ }else{
+ if(min>ATH[MAX_ATH-1])min=ATH[MAX_ATH-1];
+ }
ath[j]=min;
}
memcpy(workc[i][j+2],tonemasks[i][j],EHMER_MAX*sizeof(*tonemasks[i][j]));
memcpy(workc[i][0],tonemasks[i][0],EHMER_MAX*sizeof(*tonemasks[i][0]));
memcpy(workc[i][1],tonemasks[i][0],EHMER_MAX*sizeof(*tonemasks[i][0]));
-
+
/* apply centered curve boost/decay */
for(j=0;j<P_LEVELS;j++){
for(k=0;k<EHMER_MAX;k++){
- float adj=center_boost+abs(EHMER_OFFSET-k)*center_decay_rate;
- if(adj<0. && center_boost>0)adj=0.;
- if(adj>0. && center_boost<0)adj=0.;
- workc[i][j][k]+=adj;
+ float adj=center_boost+abs(EHMER_OFFSET-k)*center_decay_rate;
+ if(adj<0. && center_boost>0)adj=0.;
+ if(adj>0. && center_boost<0)adj=0.;
+ workc[i][j][k]+=adj;
}
}
}
/* Now limit the louder curves.
-
+
the idea is this: We don't know what the playback attenuation
will be; 0dB SL moves every time the user twiddles the volume
knob. So that means we have to use a single 'most pessimal' curve
can be in (we assume) a range of ...+100dB] SL. However, sounds
20dB down will be in a range ...+80], 40dB down is from ...+60],
etc... */
-
+
for(j=1;j<P_LEVELS;j++){
min_curve(athc[j],athc[j-1]);
min_curve(workc[i][j],athc[j]);
composite of multiple octaves. It also may mean that a single
bin may span > an eighth of an octave and that the eighth
octave values may also be composited. */
-
+
/* which octave curves will we be compositing? */
bin=floor(fromOC(i*.5)/binHz);
lo_curve= ceil(toOC(bin*binHz+1)*2);
for(m=0;m<P_LEVELS;m++){
ret[i][m]=_ogg_malloc(sizeof(***ret)*(EHMER_MAX+2));
-
+
for(j=0;j<n;j++)brute_buffer[j]=999.;
-
+
/* render the curve into bins, then pull values back into curve.
- The point is that any inherent subsampling aliasing results in
- a safe minimum */
+ The point is that any inherent subsampling aliasing results in
+ a safe minimum */
for(k=lo_curve;k<=hi_curve;k++){
- int l=0;
-
- for(j=0;j<EHMER_MAX;j++){
- int lo_bin= fromOC(j*.125+k*.5-2.0625)/binHz;
- int hi_bin= fromOC(j*.125+k*.5-1.9375)/binHz+1;
-
- if(lo_bin<0)lo_bin=0;
- if(lo_bin>n)lo_bin=n;
- if(lo_bin<l)l=lo_bin;
- if(hi_bin<0)hi_bin=0;
- if(hi_bin>n)hi_bin=n;
-
- for(;l<hi_bin && l<n;l++)
- if(brute_buffer[l]>workc[k][m][j])
- brute_buffer[l]=workc[k][m][j];
- }
-
- for(;l<n;l++)
- if(brute_buffer[l]>workc[k][m][EHMER_MAX-1])
- brute_buffer[l]=workc[k][m][EHMER_MAX-1];
+ int l=0;
+
+ for(j=0;j<EHMER_MAX;j++){
+ int lo_bin= fromOC(j*.125+k*.5-2.0625)/binHz;
+ int hi_bin= fromOC(j*.125+k*.5-1.9375)/binHz+1;
+
+ if(lo_bin<0)lo_bin=0;
+ if(lo_bin>n)lo_bin=n;
+ if(lo_bin<l)l=lo_bin;
+ if(hi_bin<0)hi_bin=0;
+ if(hi_bin>n)hi_bin=n;
+
+ for(;l<hi_bin && l<n;l++)
+ if(brute_buffer[l]>workc[k][m][j])
+ brute_buffer[l]=workc[k][m][j];
+ }
+
+ for(;l<n;l++)
+ if(brute_buffer[l]>workc[k][m][EHMER_MAX-1])
+ brute_buffer[l]=workc[k][m][EHMER_MAX-1];
}
/* be equally paranoid about being valid up to next half ocatve */
if(i+1<P_BANDS){
- int l=0;
- k=i+1;
- for(j=0;j<EHMER_MAX;j++){
- int lo_bin= fromOC(j*.125+i*.5-2.0625)/binHz;
- int hi_bin= fromOC(j*.125+i*.5-1.9375)/binHz+1;
-
- if(lo_bin<0)lo_bin=0;
- if(lo_bin>n)lo_bin=n;
- if(lo_bin<l)l=lo_bin;
- if(hi_bin<0)hi_bin=0;
- if(hi_bin>n)hi_bin=n;
-
- for(;l<hi_bin && l<n;l++)
- if(brute_buffer[l]>workc[k][m][j])
- brute_buffer[l]=workc[k][m][j];
- }
-
- for(;l<n;l++)
- if(brute_buffer[l]>workc[k][m][EHMER_MAX-1])
- brute_buffer[l]=workc[k][m][EHMER_MAX-1];
+ int l=0;
+ k=i+1;
+ for(j=0;j<EHMER_MAX;j++){
+ int lo_bin= fromOC(j*.125+i*.5-2.0625)/binHz;
+ int hi_bin= fromOC(j*.125+i*.5-1.9375)/binHz+1;
+
+ if(lo_bin<0)lo_bin=0;
+ if(lo_bin>n)lo_bin=n;
+ if(lo_bin<l)l=lo_bin;
+ if(hi_bin<0)hi_bin=0;
+ if(hi_bin>n)hi_bin=n;
+
+ for(;l<hi_bin && l<n;l++)
+ if(brute_buffer[l]>workc[k][m][j])
+ brute_buffer[l]=workc[k][m][j];
+ }
+
+ for(;l<n;l++)
+ if(brute_buffer[l]>workc[k][m][EHMER_MAX-1])
+ brute_buffer[l]=workc[k][m][EHMER_MAX-1];
}
for(j=0;j<EHMER_MAX;j++){
- int bin=fromOC(j*.125+i*.5-2.)/binHz;
- if(bin<0){
- ret[i][m][j+2]=-999.;
- }else{
- if(bin>=n){
- ret[i][m][j+2]=-999.;
- }else{
- ret[i][m][j+2]=brute_buffer[bin];
- }
- }
+ int bin=fromOC(j*.125+i*.5-2.)/binHz;
+ if(bin<0){
+ ret[i][m][j+2]=-999.;
+ }else{
+ if(bin>=n){
+ ret[i][m][j+2]=-999.;
+ }else{
+ ret[i][m][j+2]=brute_buffer[bin];
+ }
+ }
}
/* add fenceposts */
for(j=0;j<EHMER_OFFSET;j++)
- if(ret[i][m][j+2]>-200.f)break;
+ if(ret[i][m][j+2]>-200.f)break;
ret[i][m][0]=j;
-
+
for(j=EHMER_MAX-1;j>EHMER_OFFSET+1;j--)
- if(ret[i][m][j+2]>-200.f)
- break;
+ if(ret[i][m][j+2]>-200.f)
+ break;
ret[i][m][1]=j;
}
}
void _vp_psy_init(vorbis_look_psy *p,vorbis_info_psy *vi,
- vorbis_info_psy_global *gi,int n,long rate){
+ vorbis_info_psy_global *gi,int n,long rate){
long i,j,lo=-99,hi=1;
long maxoc;
memset(p,0,sizeof(*p));
if(rate < 26000) p->m_val = 0;
else if(rate < 38000) p->m_val = .94; /* 32kHz */
else if(rate > 46000) p->m_val = 1.275; /* 48kHz */
-
+
/* set up the lookups for a given blocksize and sample rate */
for(i=0,j=0;i<MAX_ATH-1;i++){
}
}
+ for(;j<n;j++){
+ p->ath[j]=p->ath[j-1];
+ }
+
for(i=0;i<n;i++){
- float bark=toBARK(rate/(2*n)*i);
+ float bark=toBARK(rate/(2*n)*i);
+
+ for(;lo+vi->noisewindowlomin<i &&
+ toBARK(rate/(2*n)*lo)<(bark-vi->noisewindowlo);lo++);
- for(;lo+vi->noisewindowlomin<i &&
- toBARK(rate/(2*n)*lo)<(bark-vi->noisewindowlo);lo++);
-
for(;hi<=n && (hi<i+vi->noisewindowhimin ||
- toBARK(rate/(2*n)*hi)<(bark+vi->noisewindowhi));hi++);
-
+ toBARK(rate/(2*n)*hi)<(bark+vi->noisewindowhi));hi++);
+
p->bark[i]=((lo-1)<<16)+(hi-1);
}
p->octave[i]=toOC((i+.25f)*.5*rate/n)*(1<<(p->shiftoc+1))+.5f;
p->tonecurves=setup_tone_curves(vi->toneatt,rate*.5/n,n,
- vi->tone_centerboost,vi->tone_decay);
-
+ vi->tone_centerboost,vi->tone_decay);
+
/* set up rolling noise median */
p->noiseoffset=_ogg_malloc(P_NOISECURVES*sizeof(*p->noiseoffset));
for(i=0;i<P_NOISECURVES;i++)
p->noiseoffset[i]=_ogg_malloc(n*sizeof(**p->noiseoffset));
-
+
for(i=0;i<n;i++){
float halfoc=toOC((i+.5)*rate/(2.*n))*2.;
int inthalfoc;
float del;
-
+
if(halfoc<0)halfoc=0;
if(halfoc>=P_BANDS-1)halfoc=P_BANDS-1;
inthalfoc=(int)halfoc;
del=halfoc-inthalfoc;
-
+
for(j=0;j<P_NOISECURVES;j++)
p->noiseoffset[j][i]=
- p->vi->noiseoff[j][inthalfoc]*(1.-del) +
- p->vi->noiseoff[j][inthalfoc+1]*del;
-
+ p->vi->noiseoff[j][inthalfoc]*(1.-del) +
+ p->vi->noiseoff[j][inthalfoc+1]*del;
+
}
#if 0
{
if(p->bark)_ogg_free(p->bark);
if(p->tonecurves){
for(i=0;i<P_BANDS;i++){
- for(j=0;j<P_LEVELS;j++){
- _ogg_free(p->tonecurves[i][j]);
- }
- _ogg_free(p->tonecurves[i]);
+
for(j=0;j<P_LEVELS;j++){
+ _ogg_free(p->tonecurves[i][j]);
+ }
+ _ogg_free(p->tonecurves[i]);
}
_ogg_free(p->tonecurves);
}
/* octave/(8*eighth_octave_lines) x scale and dB y scale */
static void seed_curve(float *seed,
- const float **curves,
- float amp,
- int oc, int n,
- int linesper,float dBoffset){
+ const float **curves,
+ float amp,
+ int oc, int n,
+ int linesper,float dBoffset){
int i,post1;
int seedptr;
const float *posts,*curve;
}
static void seed_loop(vorbis_look_psy *p,
- const float ***curves,
- const float *f,
- const float *flr,
- float *seed,
- float specmax){
+ const float ***curves,
+ const float *f,
+ const float *flr,
+ float *seed,
+ float specmax){
vorbis_info_psy *vi=p->vi;
long n=p->n,i;
float dBoffset=vi->max_curve_dB-specmax;
i++;
if(f[i]>max)max=f[i];
}
-
+
if(max+6.f>flr[i]){
oc=oc>>p->shiftoc;
if(oc<0)oc=0;
seed_curve(seed,
- curves[oc],
- max,
- p->octave[i]-p->firstoc,
- p->total_octave_lines,
- p->eighth_octave_lines,
- dBoffset);
+ curves[oc],
+ max,
+ p->octave[i]-p->firstoc,
+ p->total_octave_lines,
+ p->eighth_octave_lines,
+ dBoffset);
}
}
}
ampstack[stack++]=seeds[i];
}else{
while(1){
- if(seeds[i]<ampstack[stack-1]){
- posstack[stack]=i;
- ampstack[stack++]=seeds[i];
- break;
- }else{
- if(i<posstack[stack-1]+linesper){
- if(stack>1 && ampstack[stack-1]<=ampstack[stack-2] &&
- i<posstack[stack-2]+linesper){
- /* we completely overlap, making stack-1 irrelevant. pop it */
- stack--;
- continue;
- }
- }
- posstack[stack]=i;
- ampstack[stack++]=seeds[i];
- break;
-
- }
+
if(seeds[i]<ampstack[stack-1]){
+ posstack[stack]=i;
+ ampstack[stack++]=seeds[i];
+ break;
+ }else{
+
if(i<posstack[stack-1]+linesper){
+ if(stack>1 && ampstack[stack-1]<=ampstack[stack-2] &&
+
i<posstack[stack-2]+linesper){
+ /* we completely overlap, making stack-1 irrelevant. pop it */
+ stack--;
+ continue;
+ }
+ }
+ posstack[stack]=i;
+ ampstack[stack++]=seeds[i];
+ break;
+
+ }
}
}
}
endpos=posstack[i+1];
}else{
endpos=posstack[i]+linesper+1; /* +1 is important, else bin 0 is
- discarded in short frames */
+ discarded in short frames */
}
if(endpos>n)endpos=n;
for(;pos<endpos;pos++)
seeds[pos]=ampstack[i];
}
-
+
/* there. Linear time. I now remember this was on a problem set I
had in Grad Skool... I didn't solve it at the time ;-) */
/* bleaugh, this is more complicated than it needs to be */
#include<stdio.h>
static void max_seeds(vorbis_look_psy *p,
- float *seed,
- float *flr){
+ float *seed,
+ float *flr){
long n=p->total_octave_lines;
int linesper=p->eighth_octave_lines;
long linpos=0;
long pos;
seed_chase(seed,linesper,n); /* for masking */
-
+
pos=p->octave[0]-p->firstoc-(linesper>>1);
while(linpos+1<p->n){
while(pos+1<=end){
pos++;
if((seed[pos]>NEGINF && seed[pos]<minV) || minV==NEGINF)
- minV=seed[pos];
+ minV=seed[pos];
}
-
+
end=pos+p->firstoc;
for(;linpos<p->n && p->octave[linpos]<=end;linpos++)
if(flr[linpos]<minV)flr[linpos]=minV;
}
-
+
{
float minV=seed[p->total_octave_lines-1];
for(;linpos<p->n;linpos++)
if(flr[linpos]<minV)flr[linpos]=minV;
}
-
+
}
static void bark_noise_hybridmp(int n,const long *b,
float *noise,
const float offset,
const int fixed){
-
+
float *N=alloca(n*sizeof(*N));
float *X=alloca(n*sizeof(*N));
float *XX=alloca(n*sizeof(*N));
if (y < 1.f) y = 1.f;
w = y * y * .5;
-
+
tN += w;
tX += w;
tY += w * y;
XY[0] = tXY;
for (i = 1, x = 1.f; i < n; i++, x += 1.f) {
-
+
y = f[i] + offset;
if (y < 1.f) y = 1.f;
w = y * y;
-
+
tN += w;
tX += w * x;
tXX += w * x * x;
Y[i] = tY;
XY[i] = tXY;
}
-
- for (i = 0, x = 0.f;; i++, x += 1.f) {
-
+
+ for (i = 0, x = 0.f; i < n; i++, x += 1.f) {
+
lo = b[i] >> 16;
- if( lo>=0 ) break;
hi = b[i] & 0xffff;
-
+ if( lo>=0 || -lo>=n ) break;
+ if( hi>=n ) break;
+
tN = N[hi] + N[-lo];
tX = X[hi] - X[-lo];
tXX = XX[hi] + XX[-lo];
- tY = Y[hi] + Y[-lo];
+ tY = Y[hi] + Y[-lo];
tXY = XY[hi] - XY[-lo];
-
+
A = tY * tXX - tX * tXY;
B = tN * tXY - tX * tY;
D = tN * tXX - tX * tX;
R = (A + x * B) / D;
- if (R < 0.f)
- R = 0.f;
-
+ if (R < 0.f) R = 0.f;
+
noise[i] = R - offset;
}
-
- for ( ;; i++, x += 1.f) {
-
+
+ for ( ; i < n; i++, x += 1.f) {
+
lo = b[i] >> 16;
hi = b[i] & 0xffff;
- if(hi>=n)break;
-
+ if( lo<0 || lo>=n ) break;
+ if( hi>=n ) break;
+
tN = N[hi] - N[lo];
tX = X[hi] - X[lo];
tXX = XX[hi] - XX[lo];
tY = Y[hi] - Y[lo];
tXY = XY[hi] - XY[lo];
-
+
A = tY * tXX - tX * tXY;
B = tN * tXY - tX * tY;
D = tN * tXX - tX * tX;
R = (A + x * B) / D;
if (R < 0.f) R = 0.f;
-
+
noise[i] = R - offset;
}
+
for ( ; i < n; i++, x += 1.f) {
-
+
R = (A + x * B) / D;
if (R < 0.f) R = 0.f;
-
+
noise[i] = R - offset;
}
-
+
if (fixed <= 0) return;
-
- for (i = 0, x = 0.f;; i++, x += 1.f) {
+
+ for (i = 0, x = 0.f; i < n; i++, x += 1.f) {
hi = i + fixed / 2;
lo = hi - fixed;
- if(lo>=0)break;
+ if ( hi>=n ) break;
+ if ( lo>=0 ) break;
tN = N[hi] + N[-lo];
tX = X[hi] - X[-lo];
tXX = XX[hi] + XX[-lo];
tY = Y[hi] + Y[-lo];
tXY = XY[hi] - XY[-lo];
-
-
+
+
A = tY * tXX - tX * tXY;
B = tN * tXY - tX * tY;
D = tN * tXX - tX * tX;
if (R - offset < noise[i]) noise[i] = R - offset;
}
- for ( ;; i++, x += 1.f) {
-
+ for ( ; i < n; i++, x += 1.f) {
+
hi = i + fixed / 2;
lo = hi - fixed;
- if(hi>=n)break;
-
+ if ( hi>=n ) break;
+ if ( lo<0 ) break;
+
tN = N[hi] - N[lo];
tX = X[hi] - X[lo];
tXX = XX[hi] - XX[lo];
tY = Y[hi] - Y[lo];
tXY = XY[hi] - XY[lo];
-
+
A = tY * tXX - tX * tXY;
B = tN * tXY - tX * tY;
D = tN * tXX - tX * tX;
R = (A + x * B) / D;
-
+
if (R - offset < noise[i]) noise[i] = R - offset;
}
for ( ; i < n; i++, x += 1.f) {
}
}
-static float FLOOR1_fromdB_INV_LOOKUP[256]={
- 0.F, 8.81683e+06F, 8.27882e+06F, 7.77365e+06F,
- 7.29930e+06F, 6.85389e+06F, 6.43567e+06F, 6.04296e+06F,
- 5.67422e+06F, 5.32798e+06F, 5.00286e+06F, 4.69759e+06F,
- 4.41094e+06F, 4.14178e+06F, 3.88905e+06F, 3.65174e+06F,
- 3.42891e+06F, 3.21968e+06F, 3.02321e+06F, 2.83873e+06F,
- 2.66551e+06F, 2.50286e+06F, 2.35014e+06F, 2.20673e+06F,
- 2.07208e+06F, 1.94564e+06F, 1.82692e+06F, 1.71544e+06F,
- 1.61076e+06F, 1.51247e+06F, 1.42018e+06F, 1.33352e+06F,
- 1.25215e+06F, 1.17574e+06F, 1.10400e+06F, 1.03663e+06F,
- 973377.F, 913981.F, 858210.F, 805842.F,
- 756669.F, 710497.F, 667142.F, 626433.F,
- 588208.F, 552316.F, 518613.F, 486967.F,
- 457252.F, 429351.F, 403152.F, 378551.F,
- 355452.F, 333762.F, 313396.F, 294273.F,
- 276316.F, 259455.F, 243623.F, 228757.F,
- 214798.F, 201691.F, 189384.F, 177828.F,
- 166977.F, 156788.F, 147221.F, 138237.F,
- 129802.F, 121881.F, 114444.F, 107461.F,
- 100903.F, 94746.3F, 88964.9F, 83536.2F,
- 78438.8F, 73652.5F, 69158.2F, 64938.1F,
- 60975.6F, 57254.9F, 53761.2F, 50480.6F,
- 47400.3F, 44507.9F, 41792.0F, 39241.9F,
- 36847.3F, 34598.9F, 32487.7F, 30505.3F,
- 28643.8F, 26896.0F, 25254.8F, 23713.7F,
- 22266.7F, 20908.0F, 19632.2F, 18434.2F,
- 17309.4F, 16253.1F, 15261.4F, 14330.1F,
- 13455.7F, 12634.6F, 11863.7F, 11139.7F,
- 10460.0F, 9821.72F, 9222.39F, 8659.64F,
- 8131.23F, 7635.06F, 7169.17F, 6731.70F,
- 6320.93F, 5935.23F, 5573.06F, 5232.99F,
- 4913.67F, 4613.84F, 4332.30F, 4067.94F,
- 3819.72F, 3586.64F, 3367.78F, 3162.28F,
- 2969.31F, 2788.13F, 2617.99F, 2458.24F,
- 2308.24F, 2167.39F, 2035.14F, 1910.95F,
- 1794.35F, 1684.85F, 1582.04F, 1485.51F,
- 1394.86F, 1309.75F, 1229.83F, 1154.78F,
- 1084.32F, 1018.15F, 956.024F, 897.687F,
- 842.910F, 791.475F, 743.179F, 697.830F,
- 655.249F, 615.265F, 577.722F, 542.469F,
- 509.367F, 478.286F, 449.101F, 421.696F,
- 395.964F, 371.803F, 349.115F, 327.812F,
- 307.809F, 289.026F, 271.390F, 254.830F,
- 239.280F, 224.679F, 210.969F, 198.096F,
- 186.008F, 174.658F, 164.000F, 153.993F,
- 144.596F, 135.773F, 127.488F, 119.708F,
- 112.404F, 105.545F, 99.1046F, 93.0572F,
- 87.3788F, 82.0469F, 77.0404F, 72.3394F,
- 67.9252F, 63.7804F, 59.8885F, 56.2341F,
- 52.8027F, 49.5807F, 46.5553F, 43.7144F,
- 41.0470F, 38.5423F, 36.1904F, 33.9821F,
- 31.9085F, 29.9614F, 28.1332F, 26.4165F,
- 24.8045F, 23.2910F, 21.8697F, 20.5352F,
- 19.2822F, 18.1056F, 17.0008F, 15.9634F,
- 14.9893F, 14.0746F, 13.2158F, 12.4094F,
- 11.6522F, 10.9411F, 10.2735F, 9.64662F,
- 9.05798F, 8.50526F, 7.98626F, 7.49894F,
- 7.04135F, 6.61169F, 6.20824F, 5.82941F,
- 5.47370F, 5.13970F, 4.82607F, 4.53158F,
- 4.25507F, 3.99542F, 3.75162F, 3.52269F,
- 3.30774F, 3.10590F, 2.91638F, 2.73842F,
- 2.57132F, 2.41442F, 2.26709F, 2.12875F,
- 1.99885F, 1.87688F, 1.76236F, 1.65482F,
- 1.55384F, 1.45902F, 1.36999F, 1.28640F,
- 1.20790F, 1.13419F, 1.06499F, 1.F
-};
-
-void _vp_remove_floor(vorbis_look_psy *p,
- float *mdct,
- int *codedflr,
- float *residue,
- int sliding_lowpass){
-
- int i,n=p->n;
-
- if(sliding_lowpass>n)sliding_lowpass=n;
-
- for(i=0;i<sliding_lowpass;i++){
- residue[i]=
- mdct[i]*FLOOR1_fromdB_INV_LOOKUP[codedflr[i]];
- }
-
- for(;i<n;i++)
- residue[i]=0.;
-}
-
void _vp_noisemask(vorbis_look_psy *p,
- float *logmdct,
- float *logmask){
+ float *logmdct,
+ float *logmask){
int i,n=p->n;
float *work=alloca(n*sizeof(*work));
bark_noise_hybridmp(n,p->bark,logmdct,logmask,
- 140.,-1);
+ 140.,-1);
for(i=0;i<n;i++)work[i]=logmdct[i]-logmask[i];
bark_noise_hybridmp(n,p->bark,work,logmask,0.,
- p->vi->noisewindowfixed);
+ p->vi->noisewindowfixed);
for(i=0;i<n;i++)work[i]=logmdct[i]-work[i];
-
+
#if 0
{
static int seq=0;
for(i=0;i<n;i++){
work2[i]=logmask[i]+work[i];
}
-
+
if(seq&1)
_analysis_output("median2R",seq/2,work,n,1,0,0);
else
_analysis_output("median2L",seq/2,work,n,1,0,0);
-
+
if(seq&1)
_analysis_output("envelope2R",seq/2,work2,n,1,0,0);
else
}
void _vp_tonemask(vorbis_look_psy *p,
- float *logfft,
- float *logmask,
- float global_specmax,
- float local_specmax){
+ float *logfft,
+ float *logmask,
+ float global_specmax,
+ float local_specmax){
int i,n=p->n;
float *seed=alloca(sizeof(*seed)*p->total_octave_lines);
float att=local_specmax+p->vi->ath_adjatt;
for(i=0;i<p->total_octave_lines;i++)seed[i]=NEGINF;
-
+
/* set the ATH (floating below localmax, not global max by a
specified att) */
if(att<p->vi->ath_maxatt)att=p->vi->ath_maxatt;
-
+
for(i=0;i<n;i++)
logmask[i]=p->ath[i]+att;
}
void _vp_offset_and_mix(vorbis_look_psy *p,
- float *noise,
- float *tone,
- int offset_select,
- float *logmask,
- float *mdct,
- float *logmdct){
+ float *noise,
+ float *tone,
+ int offset_select,
+ float *logmask,
+ float *mdct,
+ float *logmdct){
int i,n=p->n;
float de, coeffi, cx;/* AoTuV */
float toneatt=p->vi->tone_masteratt[offset_select];
cx = p->m_val;
-
+
for(i=0;i<n;i++){
float val= noise[i]+p->noiseoffset[offset_select][i];
if(val>p->vi->noisemaxsupp)val=p->vi->noisemaxsupp;
/* AoTuV */
/** @ M1 **
- The following codes improve a noise problem.
- A fundamental idea uses the value of masking and carries out
- the relative compensation of the MDCT.
- However, this code is not perfect and all noise problems cannot be solved.
- by Aoyumi @ 2004/04/18
+ The following codes improve a noise problem.
+ A fundamental idea uses the value of masking and carries out
+ the relative compensation of the MDCT.
+ However, this code is not perfect and all noise problems cannot be solved.
+ by Aoyumi @ 2004/04/18
*/
if(offset_select == 1) {
coeffi = -17.2; /* coeffi is a -17.2dB threshold */
val = val - logmdct[i]; /* val == mdct line value relative to floor in dB */
-
+
if(val > coeffi){
- /* mdct value is > -17.2 dB below floor */
-
- de = 1.0-((val-coeffi)*0.005*cx);
- /* pro-rated attenuation:
- -0.00 dB boost if mdct value is -17.2dB (relative to floor)
- -0.77 dB boost if mdct value is 0dB (relative to floor)
- -1.64 dB boost if mdct value is +17.2dB (relative to floor)
- etc... */
-
- if(de < 0) de = 0.0001;
+ /* mdct value is > -17.2 dB below floor */
+
+ de = 1.0-((val-coeffi)*0.005*cx);
+ /* pro-rated attenuation:
+ -0.00 dB boost if mdct value is -17.2dB (relative to floor)
+ -0.77 dB boost if mdct value is 0dB (relative to floor)
+ -1.64 dB boost if mdct value is +17.2dB (relative to floor)
+ etc... */
+
+ if(de < 0) de = 0.0001;
}else
- /* mdct value is <= -17.2 dB below floor */
-
- de = 1.0-((val-coeffi)*0.0003*cx);
+ /* mdct value is <= -17.2 dB below floor */
+
+ de = 1.0-((val-coeffi)*0.0003*cx);
/* pro-rated attenuation:
- +0.00 dB atten if mdct value is -17.2dB (relative to floor)
- +0.45 dB atten if mdct value is -34.4dB (relative to floor)
- etc... */
-
+ +0.00 dB atten if mdct value is -17.2dB (relative to floor)
+ +0.45 dB atten if mdct value is -34.4dB (relative to floor)
+ etc... */
+
mdct[i] *= de;
-
+
}
}
}
return(amp);
}
-static void couple_lossless(float A, float B,
- float *qA, float *qB){
- int test1=fabs(*qA)>fabs(*qB);
- test1-= fabs(*qA)<fabs(*qB);
-
- if(!test1)test1=((fabs(A)>fabs(B))<<1)-1;
- if(test1==1){
- *qB=(*qA>0.f?*qA-*qB:*qB-*qA);
- }else{
- float temp=*qB;
- *qB=(*qB>0.f?*qA-*qB:*qB-*qA);
- *qA=temp;
- }
-
- if(*qB>fabs(*qA)*1.9999f){
- *qB= -fabs(*qA)*2.f;
- *qA= -*qA;
- }
-}
+static float FLOOR1_fromdB_LOOKUP[256]={
+ 1.0649863e-07F, 1.1341951e-07F, 1.2079015e-07F, 1.2863978e-07F,
+ 1.3699951e-07F, 1.4590251e-07F, 1.5538408e-07F, 1.6548181e-07F,
+ 1.7623575e-07F, 1.8768855e-07F, 1.9988561e-07F, 2.128753e-07F,
+ 2.2670913e-07F, 2.4144197e-07F, 2.5713223e-07F, 2.7384213e-07F,
+ 2.9163793e-07F, 3.1059021e-07F, 3.3077411e-07F, 3.5226968e-07F,
+ 3.7516214e-07F, 3.9954229e-07F, 4.2550680e-07F, 4.5315863e-07F,
+ 4.8260743e-07F, 5.1396998e-07F, 5.4737065e-07F, 5.8294187e-07F,
+ 6.2082472e-07F, 6.6116941e-07F, 7.0413592e-07F, 7.4989464e-07F,
+ 7.9862701e-07F, 8.5052630e-07F, 9.0579828e-07F, 9.6466216e-07F,
+ 1.0273513e-06F, 1.0941144e-06F, 1.1652161e-06F, 1.2409384e-06F,
+ 1.3215816e-06F, 1.4074654e-06F, 1.4989305e-06F, 1.5963394e-06F,
+ 1.7000785e-06F, 1.8105592e-06F, 1.9282195e-06F, 2.0535261e-06F,
+ 2.1869758e-06F, 2.3290978e-06F, 2.4804557e-06F, 2.6416497e-06F,
+ 2.8133190e-06F, 2.9961443e-06F, 3.1908506e-06F, 3.3982101e-06F,
+ 3.6190449e-06F, 3.8542308e-06F, 4.1047004e-06F, 4.3714470e-06F,
+ 4.6555282e-06F, 4.9580707e-06F, 5.2802740e-06F, 5.6234160e-06F,
+ 5.9888572e-06F, 6.3780469e-06F, 6.7925283e-06F, 7.2339451e-06F,
+ 7.7040476e-06F, 8.2047000e-06F, 8.7378876e-06F, 9.3057248e-06F,
+ 9.9104632e-06F, 1.0554501e-05F, 1.1240392e-05F, 1.1970856e-05F,
+ 1.2748789e-05F, 1.3577278e-05F, 1.4459606e-05F, 1.5399272e-05F,
+ 1.6400004e-05F, 1.7465768e-05F, 1.8600792e-05F, 1.9809576e-05F,
+ 2.1096914e-05F, 2.2467911e-05F, 2.3928002e-05F, 2.5482978e-05F,
+ 2.7139006e-05F, 2.8902651e-05F, 3.0780908e-05F, 3.2781225e-05F,
+ 3.4911534e-05F, 3.7180282e-05F, 3.9596466e-05F, 4.2169667e-05F,
+ 4.4910090e-05F, 4.7828601e-05F, 5.0936773e-05F, 5.4246931e-05F,
+ 5.7772202e-05F, 6.1526565e-05F, 6.5524908e-05F, 6.9783085e-05F,
+ 7.4317983e-05F, 7.9147585e-05F, 8.4291040e-05F, 8.9768747e-05F,
+ 9.5602426e-05F, 0.00010181521F, 0.00010843174F, 0.00011547824F,
+ 0.00012298267F, 0.00013097477F, 0.00013948625F, 0.00014855085F,
+ 0.00015820453F, 0.00016848555F, 0.00017943469F, 0.00019109536F,
+ 0.00020351382F, 0.00021673929F, 0.00023082423F, 0.00024582449F,
+ 0.00026179955F, 0.00027881276F, 0.00029693158F, 0.00031622787F,
+ 0.00033677814F, 0.00035866388F, 0.00038197188F, 0.00040679456F,
+ 0.00043323036F, 0.00046138411F, 0.00049136745F, 0.00052329927F,
+ 0.00055730621F, 0.00059352311F, 0.00063209358F, 0.00067317058F,
+ 0.00071691700F, 0.00076350630F, 0.00081312324F, 0.00086596457F,
+ 0.00092223983F, 0.00098217216F, 0.0010459992F, 0.0011139742F,
+ 0.0011863665F, 0.0012634633F, 0.0013455702F, 0.0014330129F,
+ 0.0015261382F, 0.0016253153F, 0.0017309374F, 0.0018434235F,
+ 0.0019632195F, 0.0020908006F, 0.0022266726F, 0.0023713743F,
+ 0.0025254795F, 0.0026895994F, 0.0028643847F, 0.0030505286F,
+ 0.0032487691F, 0.0034598925F, 0.0036847358F, 0.0039241906F,
+ 0.0041792066F, 0.0044507950F, 0.0047400328F, 0.0050480668F,
+ 0.0053761186F, 0.0057254891F, 0.0060975636F, 0.0064938176F,
+ 0.0069158225F, 0.0073652516F, 0.0078438871F, 0.0083536271F,
+ 0.0088964928F, 0.009474637F, 0.010090352F, 0.010746080F,
+ 0.011444421F, 0.012188144F, 0.012980198F, 0.013823725F,
+ 0.014722068F, 0.015678791F, 0.016697687F, 0.017782797F,
+ 0.018938423F, 0.020169149F, 0.021479854F, 0.022875735F,
+ 0.024362330F, 0.025945531F, 0.027631618F, 0.029427276F,
+ 0.031339626F, 0.033376252F, 0.035545228F, 0.037855157F,
+ 0.040315199F, 0.042935108F, 0.045725273F, 0.048696758F,
+ 0.051861348F, 0.055231591F, 0.058820850F, 0.062643361F,
+ 0.066714279F, 0.071049749F, 0.075666962F, 0.080584227F,
+ 0.085821044F, 0.091398179F, 0.097337747F, 0.10366330F,
+ 0.11039993F, 0.11757434F, 0.12521498F, 0.13335215F,
+ 0.14201813F, 0.15124727F, 0.16107617F, 0.17154380F,
+ 0.18269168F, 0.19456402F, 0.20720788F, 0.22067342F,
+ 0.23501402F, 0.25028656F, 0.26655159F, 0.28387361F,
+ 0.30232132F, 0.32196786F, 0.34289114F, 0.36517414F,
+ 0.38890521F, 0.41417847F, 0.44109412F, 0.46975890F,
+ 0.50028648F, 0.53279791F, 0.56742212F, 0.60429640F,
+ 0.64356699F, 0.68538959F, 0.72993007F, 0.77736504F,
+ 0.82788260F, 0.88168307F, 0.9389798F, 1.F,
+};
-static float hypot_lookup[32]={
- -0.009935, -0.011245, -0.012726, -0.014397,
- -0.016282, -0.018407, -0.020800, -0.023494,
- -0.026522, -0.029923, -0.033737, -0.038010,
- -0.042787, -0.048121, -0.054064, -0.060671,
- -0.068000, -0.076109, -0.085054, -0.094892,
- -0.105675, -0.117451, -0.130260, -0.144134,
- -0.159093, -0.175146, -0.192286, -0.210490,
- -0.229718, -0.249913, -0.271001, -0.292893};
-
-static void precomputed_couple_point(float premag,
- int floorA,int floorB,
- float *mag, float *ang){
-
- int test=(floorA>floorB)-1;
- int offset=31-abs(floorA-floorB);
- float floormag=hypot_lookup[((offset<0)-1)&offset]+1.f;
-
- floormag*=FLOOR1_fromdB_INV_LOOKUP[(floorB&test)|(floorA&(~test))];
-
- *mag=premag*floormag;
- *ang=0.f;
+/* this is for per-channel noise normalization */
+static int apsort(const void *a, const void *b){
+ float f1=**(float**)a;
+ float f2=**(float**)b;
+ return (f1<f2)-(f1>f2);
}
-/* just like below, this is currently set up to only do
- single-step-depth coupling. Otherwise, we'd have to do more
- copying (which will be inevitable later) */
-
-/* doing the real circular magnitude calculation is audibly superior
- to (A+B)/sqrt(2) */
-static float dipole_hypot(float a, float b){
- if(a>0.){
- if(b>0.)return sqrt(a*a+b*b);
- if(a>-b)return sqrt(a*a-b*b);
- return -sqrt(b*b-a*a);
- }
- if(b<0.)return -sqrt(a*a+b*b);
- if(-a>b)return -sqrt(a*a-b*b);
- return sqrt(b*b-a*a);
-}
-static float round_hypot(float a, float b){
- if(a>0.){
- if(b>0.)return sqrt(a*a+b*b);
- if(a>-b)return sqrt(a*a+b*b);
- return -sqrt(b*b+a*a);
+static void flag_lossless(int limit, float prepoint, float postpoint, float *mdct,
+ float *floor, int *flag, int i, int jn){
+ int j;
+ for(j=0;j<jn;j++){
+ float point = j>=limit-i ? postpoint : prepoint;
+ float r = fabs(mdct[j])/floor[j];
+ if(r<point)
+ flag[j]=0;
+ else
+ flag[j]=1;
}
- if(b<0.)return -sqrt(a*a+b*b);
- if(-a>b)return -sqrt(a*a+b*b);
- return sqrt(b*b+a*a);
}
-/* revert to round hypot for now */
-float **_vp_quantize_couple_memo(vorbis_block *vb,
- vorbis_info_psy_global *g,
- vorbis_look_psy *p,
- vorbis_info_mapping0 *vi,
- float **mdct){
-
- int i,j,n=p->n;
- float **ret=_vorbis_block_alloc(vb,vi->coupling_steps*sizeof(*ret));
- int limit=g->coupling_pointlimit[p->vi->blockflag][PACKETBLOBS/2];
-
- for(i=0;i<vi->coupling_steps;i++){
- float *mdctM=mdct[vi->coupling_mag[i]];
- float *mdctA=mdct[vi->coupling_ang[i]];
- ret[i]=_vorbis_block_alloc(vb,n*sizeof(**ret));
- for(j=0;j<limit;j++)
- ret[i][j]=dipole_hypot(mdctM[j],mdctA[j]);
- for(;j<n;j++)
- ret[i][j]=round_hypot(mdctM[j],mdctA[j]);
- }
+/* Overload/Side effect: On input, the *q vector holds either the
+ quantized energy (for elements with the flag set) or the absolute
+ values of the *r vector (for elements with flag unset). On output,
+ *q holds the quantized energy for all elements */
+static float noise_normalize(vorbis_look_psy *p, int limit, float *r, float *q, float *f, int *flags, float acc, int i, int n, int *out){
- return(ret);
-}
+ vorbis_info_psy *vi=p->vi;
+ float **sort = alloca(n*sizeof(*sort));
+ int j,count=0;
+ int start = (vi->normal_p ? vi->normal_start-i : n);
+ if(start>n)start=n;
-/* this is for per-channel noise normalization */
-static int apsort(const void *a, const void *b){
- float f1=fabs(**(float**)a);
- float f2=fabs(**(float**)b);
- return (f1<f2)-(f1>f2);
-}
+ /* force classic behavior where only energy in the current band is considered */
+ acc=0.f;
+
+ /* still responsible for populating *out where noise norm not in
+ effect. There's no need to [re]populate *q in these areas */
+ for(j=0;j<start;j++){
+ if(!flags || !flags[j]){ /* lossless coupling already quantized.
+ Don't touch; requantizing based on
+ energy would be incorrect. */
+ float ve = q[j]/f[j];
+ if(r[j]<0)
+ out[j] = -rint(sqrt(ve));
+ else
+ out[j] = rint(sqrt(ve));
+ }
+ }
-int **_vp_quantize_couple_sort(vorbis_block *vb,
- vorbis_look_psy *p,
- vorbis_info_mapping0 *vi,
- float **mags){
-
-
- if(p->vi->normal_point_p){
- int i,j,k,n=p->n;
- int **ret=_vorbis_block_alloc(vb,vi->coupling_steps*sizeof(*ret));
- int partition=p->vi->normal_partition;
- float **work=alloca(sizeof(*work)*partition);
-
- for(i=0;i<vi->coupling_steps;i++){
- ret[i]=_vorbis_block_alloc(vb,n*sizeof(**ret));
-
- for(j=0;j<n;j+=partition){
- for(k=0;k<partition;k++)work[k]=mags[i]+k+j;
- qsort(work,partition,sizeof(*work),apsort);
- for(k=0;k<partition;k++)ret[i][k+j]=work[k]-mags[i];
+ /* sort magnitudes for noise norm portion of partition */
+ for(;j<n;j++){
+ if(!flags || !flags[j]){ /* can't noise norm elements that have
+ already been loslessly coupled; we can
+ only account for their energy error */
+ float ve = q[j]/f[j];
+ /* Despite all the new, more capable coupling code, for now we
+ implement noise norm as it has been up to this point. Only
+ consider promotions to unit magnitude from 0. In addition
+ the only energy error counted is quantizations to zero. */
+ /* also-- the original point code only applied noise norm at > pointlimit */
+ if(ve<.25f && (!flags || j>=limit-i)){
+ acc += ve;
+ sort[count++]=q+j; /* q is fabs(r) for unflagged element */
+ }else{
+ /* For now: no acc adjustment for nonzero quantization. populate *out and q as this value is final. */
+ if(r[j]<0)
+ out[j] = -rint(sqrt(ve));
+ else
+ out[j] = rint(sqrt(ve));
+ q[j] = out[j]*out[j]*f[j];
}
- }
- return(ret);
+ }/* else{
+ again, no energy adjustment for error in nonzero quant-- for now
+ }*/
}
- return(NULL);
-}
-void _vp_noise_normalize_sort(vorbis_look_psy *p,
- float *magnitudes,int *sortedindex){
- int i,j,n=p->n;
- vorbis_info_psy *vi=p->vi;
- int partition=vi->normal_partition;
- float **work=alloca(sizeof(*work)*partition);
- int start=vi->normal_start;
-
- for(j=start;j<n;j+=partition){
- if(j+partition>n)partition=n-j;
- for(i=0;i<partition;i++)work[i]=magnitudes+i+j;
- qsort(work,partition,sizeof(*work),apsort);
- for(i=0;i<partition;i++){
- sortedindex[i+j-start]=work[i]-magnitudes;
+ if(count){
+ /* noise norm to do */
+ qsort(sort,count,sizeof(*sort),apsort);
+ for(j=0;j<count;j++){
+ int k=sort[j]-q;
+ if(acc>=vi->normal_thresh){
+ out[k]=unitnorm(r[k]);
+ acc-=1.f;
+ q[k]=f[k];
+ }else{
+ out[k]=0;
+ q[k]=0.f;
+ }
}
}
+
+ return acc;
}
-void _vp_noise_normalize(vorbis_look_psy *p,
- float *in,float *out,int *sortedindex){
- int flag=0,i,j=0,n=p->n;
- vorbis_info_psy *vi=p->vi;
- int partition=vi->normal_partition;
- int start=vi->normal_start;
+/* Noise normalization, quantization and coupling are not wholly
+ seperable processes in depth>1 coupling. */
+void _vp_couple_quantize_normalize(int blobno,
+ vorbis_info_psy_global *g,
+ vorbis_look_psy *p,
+ vorbis_info_mapping0 *vi,
+ float **mdct,
+ int **iwork,
+ int *nonzero,
+ int sliding_lowpass,
+ int ch){
- if(start>n)start=n;
+ int i;
+ int n = p->n;
+ int partition=(p->vi->normal_p ? p->vi->normal_partition : 16);
+ int limit = g->coupling_pointlimit[p->vi->blockflag][blobno];
+ float prepoint=stereo_threshholds[g->coupling_prepointamp[blobno]];
+ float postpoint=stereo_threshholds[g->coupling_postpointamp[blobno]];
+#if 0
+ float de=0.1*p->m_val; /* a blend of the AoTuV M2 and M3 code here and below */
+#endif
+
+ /* mdct is our raw mdct output, floor not removed. */
+ /* inout passes in the ifloor, passes back quantized result */
+
+ /* unquantized energy (negative indicates amplitude has negative sign) */
+ float **raw = alloca(ch*sizeof(*raw));
+
+ /* dual pupose; quantized energy (if flag set), othersize fabs(raw) */
+ float **quant = alloca(ch*sizeof(*quant));
+
+ /* floor energy */
+ float **floor = alloca(ch*sizeof(*floor));
+
+ /* flags indicating raw/quantized status of elements in raw vector */
+ int **flag = alloca(ch*sizeof(*flag));
+
+ /* non-zero flag working vector */
+ int *nz = alloca(ch*sizeof(*nz));
- if(vi->normal_channel_p){
- for(;j<start;j++)
- out[j]=rint(in[j]);
-
- for(;j+partition<=n;j+=partition){
- float acc=0.;
- int k;
-
- for(i=j;i<j+partition;i++)
- acc+=in[i]*in[i];
-
- for(i=0;i<partition;i++){
- k=sortedindex[i+j-start];
-
- if(in[k]*in[k]>=.25f){
- out[k]=rint(in[k]);
- acc-=in[k]*in[k];
- flag=1;
- }else{
- if(acc<vi->normal_thresh)break;
- out[k]=unitnorm(in[k]);
- acc-=1.;
- }
+ /* energy surplus/defecit tracking */
+ float *acc = alloca((ch+vi->coupling_steps)*sizeof(*acc));
+
+ /* The threshold of a stereo is changed with the size of n */
+ if(n > 1000)
+ postpoint=stereo_threshholds_limited[g->coupling_postpointamp[blobno]];
+
+ raw[0] = alloca(ch*partition*sizeof(**raw));
+ quant[0] = alloca(ch*partition*sizeof(**quant));
+ floor[0] = alloca(ch*partition*sizeof(**floor));
+ flag[0] = alloca(ch*partition*sizeof(**flag));
+
+ for(i=1;i<ch;i++){
+ raw[i] = &raw[0][partition*i];
+ quant[i] = &quant[0][partition*i];
+ floor[i] = &floor[0][partition*i];
+ flag[i] = &flag[0][partition*i];
+ }
+ for(i=0;i<ch+vi->coupling_steps;i++)
+ acc[i]=0.f;
+
+ for(i=0;i<n;i+=partition){
+ int k,j,jn = partition > n-i ? n-i : partition;
+ int step,track = 0;
+
+ memcpy(nz,nonzero,sizeof(*nz)*ch);
+
+ /* prefill */
+ memset(flag[0],0,ch*partition*sizeof(**flag));
+ for(k=0;k<ch;k++){
+ int *iout = &iwork[k][i];
+ if(nz[k]){
+
+ for(j=0;j<jn;j++)
+ floor[k][j] = FLOOR1_fromdB_LOOKUP[iout[j]];
+
+ flag_lossless(limit,prepoint,postpoint,&mdct[k][i],floor[k],flag[k],i,jn);
+
+ for(j=0;j<jn;j++){
+ quant[k][j] = raw[k][j] = mdct[k][i+j]*mdct[k][i+j];
+ if(mdct[k][i+j]<0.f) raw[k][j]*=-1.f;
+ floor[k][j]*=floor[k][j];
+ }
+
+ acc[track]=noise_normalize(p,limit,raw[k],quant[k],floor[k],NULL,acc[track],i,jn,iout);
+
+ }else{
+ for(j=0;j<jn;j++){
+ floor[k][j] = 1e-10f;
+ raw[k][j] = 0.f;
+ quant[k][j] = 0.f;
+ flag[k][j] = 0;
+ iout[j]=0;
+ }
+ acc[track]=0.f;
}
-
- for(;i<partition;i++){
- k=sortedindex[i+j-start];
- out[k]=0.;
+ track++;
+ }
+
+ /* coupling */
+ for(step=0;step<vi->coupling_steps;step++){
+ int Mi = vi->coupling_mag[step];
+ int Ai = vi->coupling_ang[step];
+ int *iM = &iwork[Mi][i];
+ int *iA = &iwork[Ai][i];
+ float *reM = raw[Mi];
+ float *reA = raw[Ai];
+ float *qeM = quant[Mi];
+ float *qeA = quant[Ai];
+ float *floorM = floor[Mi];
+ float *floorA = floor[Ai];
+ int *fM = flag[Mi];
+ int *fA = flag[Ai];
+
+ if(nz[Mi] || nz[Ai]){
+ nz[Mi] = nz[Ai] = 1;
+
+ for(j=0;j<jn;j++){
+
+ if(j<sliding_lowpass-i){
+ if(fM[j] || fA[j]){
+ /* lossless coupling */
+
+ reM[j] = fabs(reM[j])+fabs(reA[j]);
+ qeM[j] = qeM[j]+qeA[j];
+ fM[j]=fA[j]=1;
+
+ /* couple iM/iA */
+ {
+ int A = iM[j];
+ int B = iA[j];
+
+ if(abs(A)>abs(B)){
+ iA[j]=(A>0?A-B:B-A);
+ }else{
+ iA[j]=(B>0?A-B:B-A);
+ iM[j]=B;
+ }
+
+ /* collapse two equivalent tuples to one */
+ if(iA[j]>=abs(iM[j])*2){
+ iA[j]= -iA[j];
+ iM[j]= -iM[j];
+ }
+
+ }
+
+ }else{
+ /* lossy (point) coupling */
+ if(j<limit-i){
+ /* dipole */
+ reM[j] += reA[j];
+ qeM[j] = fabs(reM[j]);
+ }else{
+#if 0
+ /* AoTuV */
+ /** @ M2 **
+ The boost problem by the combination of noise normalization and point stereo is eased.
+ However, this is a temporary patch.
+ by Aoyumi @ 2004/04/18
+ */
+ float derate = (1.0 - de*((float)(j-limit+i) / (float)(n-limit)));
+ /* elliptical */
+ if(reM[j]+reA[j]<0){
+ reM[j] = - (qeM[j] = (fabs(reM[j])+fabs(reA[j]))*derate*derate);
+ }else{
+ reM[j] = (qeM[j] = (fabs(reM[j])+fabs(reA[j]))*derate*derate);
+ }
+#else
+ /* elliptical */
+ if(reM[j]+reA[j]<0){
+ reM[j] = - (qeM[j] = fabs(reM[j])+fabs(reA[j]));
+ }else{
+ reM[j] = (qeM[j] = fabs(reM[j])+fabs(reA[j]));
+ }
+#endif
+
+ }
+ reA[j]=qeA[j]=0.f;
+ fA[j]=1;
+ iA[j]=0;
+ }
+ }
+ floorM[j]=floorA[j]=floorM[j]+floorA[j];
+ }
+ /* normalize the resulting mag vector */
+ acc[track]=noise_normalize(p,limit,raw[Mi],quant[Mi],floor[Mi],flag[Mi],acc[track],i,jn,iM);
+ track++;
}
}
}
-
- for(;j<n;j++)
- out[j]=rint(in[j]);
-
-}
-void _vp_couple(int blobno,
- vorbis_info_psy_global *g,
- vorbis_look_psy *p,
- vorbis_info_mapping0 *vi,
- float **res,
- float **mag_memo,
- int **mag_sort,
- int **ifloor,
- int *nonzero,
- int sliding_lowpass){
-
- int i,j,k,n=p->n;
-
- /* perform any requested channel coupling */
- /* point stereo can only be used in a first stage (in this encoder)
- because of the dependency on floor lookups */
for(i=0;i<vi->coupling_steps;i++){
-
- /* once we're doing multistage coupling in which a channel goes
- through more than one coupling step, the floor vector
- magnitudes will also have to be recalculated an propogated
- along with PCM. Right now, we're not (that will wait until 5.1
- most likely), so the code isn't here yet. The memory management
- here is all assuming single depth couplings anyway. */
-
/* make sure coupling a zero and a nonzero channel results in two
nonzero channels. */
if(nonzero[vi->coupling_mag[i]] ||
nonzero[vi->coupling_ang[i]]){
-
-
- float *rM=res[vi->coupling_mag[i]];
- float *rA=res[vi->coupling_ang[i]];
- float *qM=rM+n;
- float *qA=rA+n;
- int *floorM=ifloor[vi->coupling_mag[i]];
- int *floorA=ifloor[vi->coupling_ang[i]];
- float prepoint=stereo_threshholds[g->coupling_prepointamp[blobno]];
- float postpoint=stereo_threshholds[g->coupling_postpointamp[blobno]];
- int partition=(p->vi->normal_point_p?p->vi->normal_partition:p->n);
- int limit=g->coupling_pointlimit[p->vi->blockflag][blobno];
- int pointlimit=limit;
-
- nonzero[vi->coupling_mag[i]]=1;
- nonzero[vi->coupling_ang[i]]=1;
-
- /* The threshold of a stereo is changed with the size of n */
- if(n > 1000)
- postpoint=stereo_threshholds_limited[g->coupling_postpointamp[blobno]];
-
- for(j=0;j<p->n;j+=partition){
- float acc=0.f;
-
- for(k=0;k<partition;k++){
- int l=k+j;
-
- if(l<sliding_lowpass){
- if((l>=limit && fabs(rM[l])<postpoint && fabs(rA[l])<postpoint) ||
- (fabs(rM[l])<prepoint && fabs(rA[l])<prepoint)){
-
-
- precomputed_couple_point(mag_memo[i][l],
- floorM[l],floorA[l],
- qM+l,qA+l);
-
- if(rint(qM[l])==0.f)acc+=qM[l]*qM[l];
- }else{
- couple_lossless(rM[l],rA[l],qM+l,qA+l);
- }
- }else{
- qM[l]=0.;
- qA[l]=0.;
- }
- }
-
- if(p->vi->normal_point_p){
- for(k=0;k<partition && acc>=p->vi->normal_thresh;k++){
- int l=mag_sort[i][j+k];
- if(l<sliding_lowpass && l>=pointlimit && rint(qM[l])==0.f){
- qM[l]=unitnorm(qM[l]);
- acc-=1.f;
- }
- }
- }
- }
+ nonzero[vi->coupling_mag[i]]=1;
+ nonzero[vi->coupling_ang[i]]=1;
}
}
}
-
-/* AoTuV */
-/** @ M2 **
- The boost problem by the combination of noise normalization and point stereo is eased.
- However, this is a temporary patch.
- by Aoyumi @ 2004/04/18
-*/
-
-void hf_reduction(vorbis_info_psy_global *g,
- vorbis_look_psy *p,
- vorbis_info_mapping0 *vi,
- float **mdct){
-
- int i,j,n=p->n, de=0.3*p->m_val;
- int limit=g->coupling_pointlimit[p->vi->blockflag][PACKETBLOBS/2];
-
- for(i=0; i<vi->coupling_steps; i++){
- /* for(j=start; j<limit; j++){} // ???*/
- for(j=limit; j<n; j++)
- mdct[i][j] *= (1.0 - de*((float)(j-limit) / (float)(n-limit)));
- }
-}
projects / platform / upstream / libvorbis.git / blobdiff