diff options
Diffstat (limited to 'libspeex/vorbis_psy.c')
| -rw-r--r-- | libspeex/vorbis_psy.c | 112 |
1 files changed, 56 insertions, 56 deletions
diff --git a/libspeex/vorbis_psy.c b/libspeex/vorbis_psy.c index 68a6fe9..cb385b7 100644 --- a/libspeex/vorbis_psy.c +++ b/libspeex/vorbis_psy.c @@ -4,18 +4,18 @@ Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - + - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - + - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - + - Neither the name of the Xiph.org Foundation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. - + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR @@ -48,15 +48,15 @@ /* psychoacoustic setup ********************************************/ static VorbisPsyInfo example_tuning = { - - .5,.5, + + .5,.5, 3,3,25, - + /*63 125 250 500 1k 2k 4k 8k 16k*/ // vorbis mode 4 style //{-32,-32,-32,-32,-28,-24,-22,-20,-20, -20, -20, -8, -6, -6, -6, -6, -6}, { -4, -6, -6, -6, -6, -6, -6, -6, -8, -8,-10,-10, -8, -6, -4, -4, -2}, - + { 0, 1, 2, 3, 4, 5, 5, 5, /* 7dB */ 6, 6, 6, 5, 4, 4, 4, 4, /* 15dB */ @@ -78,16 +78,16 @@ static void _analysis_output(char *base,int i,float *v,int n,int bark,int dB){ sprintf(buffer,"%s_%d.m",base,i); of=fopen(buffer,"w"); - + if(!of)perror("failed to open data dump file"); - + for(j=0;j<n;j++){ if(bark){ float b=toBARK((4000.f*j/n)+.25); fprintf(of,"%f ",b); }else fprintf(of,"%f ",(double)j); - + if(dB){ float val; if(v[j]==0.) @@ -107,7 +107,7 @@ 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)); @@ -127,7 +127,7 @@ static void bark_noise_hybridmp(int n,const long *b, if (y < 1.f) y = 1.f; w = y * y * .5; - + tN += w; tX += w; tY += w * y; @@ -139,12 +139,12 @@ static void bark_noise_hybridmp(int n,const long *b, 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; @@ -157,59 +157,59 @@ static void bark_noise_hybridmp(int n,const long *b, Y[i] = tY; XY[i] = tXY; } - + for (i = 0, x = 0.f;; i++, x += 1.f) { - + lo = b[i] >> 16; if( lo>=0 ) break; hi = b[i] & 0xffff; - + 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; - + noise[i] = R - offset; } - + for ( ;; i++, x += 1.f) { - + lo = b[i] >> 16; hi = b[i] & 0xffff; 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) { hi = i + fixed / 2; lo = hi - fixed; @@ -220,8 +220,8 @@ static void bark_noise_hybridmp(int n,const long *b, 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; @@ -230,22 +230,22 @@ static void bark_noise_hybridmp(int n,const long *b, if (R - offset < noise[i]) noise[i] = R - offset; } for ( ;; i++, x += 1.f) { - + hi = i + fixed / 2; lo = hi - fixed; 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 - offset < noise[i]) noise[i] = R - offset; } for ( ; i < n; i++, x += 1.f) { @@ -255,7 +255,7 @@ static void bark_noise_hybridmp(int n,const long *b, } static void _vp_noisemask(VorbisPsy *p, - float *logfreq, + float *logfreq, float *logmask){ int i,n=p->n/2; @@ -270,15 +270,15 @@ static void _vp_noisemask(VorbisPsy *p, p->vi->noisewindowfixed); for(i=0;i<n;i++)work[i]=logfreq[i]-work[i]; - + { static int seq=0; - + float work2[n]; for(i=0;i<n;i++){ work2[i]=logmask[i]+work[i]; } - + //_analysis_output("logfreq",seq,logfreq,n,0,0); //_analysis_output("median",seq,work,n,0,0); //_analysis_output("envelope",seq,work2,n,0,0); @@ -299,7 +299,7 @@ VorbisPsy *vorbis_psy_init(int rate, int n) long i,j,lo=-99,hi=1; VorbisPsy *p = speex_alloc(sizeof(VorbisPsy)); memset(p,0,sizeof(*p)); - + p->n = n; spx_drft_init(&p->lookup, n); p->bark = speex_alloc(n*sizeof(*p->bark)); @@ -317,35 +317,35 @@ VorbisPsy *vorbis_psy_init(int rate, int n) sin((i+.5)/n * M_PI)*sin((i+.5)/n * M_PI); /* bark scale lookups */ for(i=0;i<n;i++){ - float bark=toBARK(rate/(2*n)*i); - - for(;lo+p->vi->noisewindowlomin<i && + float bark=toBARK(rate/(2*n)*i); + + for(;lo+p->vi->noisewindowlomin<i && toBARK(rate/(2*n)*lo)<(bark-p->vi->noisewindowlo);lo++); - + for(;hi<=n && (hi<i+p->vi->noisewindowhimin || toBARK(rate/(2*n)*hi)<(bark+p->vi->noisewindowhi));hi++); - + p->bark[i]=((lo-1)<<16)+(hi-1); } /* set up rolling noise median */ p->noiseoffset=speex_alloc(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; - + p->noiseoffset[i]= - p->vi->noiseoff[inthalfoc]*(1.-del) + + p->vi->noiseoff[inthalfoc]*(1.-del) + p->vi->noiseoff[inthalfoc+1]*del; - + } #if 0 _analysis_output_always("noiseoff0",ls,p->noiseoffset,n,1,0,0); @@ -378,14 +378,14 @@ void compute_curve(VorbisPsy *psy, float *audio, float *curve) float scale_dB; scale_dB=todB(scale); - + /* window the PCM data; use a BH4 window, not vorbis */ for(i=0;i<psy->n;i++) work[i]=audio[i] * psy->window[i]; { static int seq=0; - + //_analysis_output("win",seq,work,psy->n,0,0); seq++; @@ -432,7 +432,7 @@ void curve_to_lpc(VorbisPsy *psy, float *curve, float *awk1, float *awk2, int or ac[2*i-1] = curve[i]; ac[0] = curve[0]; ac[2*len-1] = curve[len-1]; - + spx_drft_backward(&psy->lookup, ac); _spx_lpc(awk1, ac, ord); tmp = 1.; @@ -447,7 +447,7 @@ void curve_to_lpc(VorbisPsy *psy, float *curve, float *awk1, float *awk2, int or #else /* Use the second (awk2) filter to correct the first one */ for (i=0;i<2*len;i++) - ac[i] = 0; + ac[i] = 0; for (i=0;i<ord;i++) ac[i+1] = awk1[i]; ac[0] = 1; @@ -467,7 +467,7 @@ void curve_to_lpc(VorbisPsy *psy, float *curve, float *awk1, float *awk2, int or ac[2*i-1] = curve[i]; ac[0] = curve[0]; ac[2*len-1] = curve[len-1]; - + spx_drft_backward(&psy->lookup, ac); _spx_lpc(awk2, ac, ord); tmp = 1; |