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ffmpeg.wasm-core
Commit 039ebaa5 authored by Rostislav Pehlivanov's avatar Rostislav Pehlivanov
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lavfi: make window_func an inline function 

Eliminate lavc->lavfi dependency. The function isn't big and doesn't
deserve its own file.
Signed-off-by: 's avatarRostislav Pehlivanov <atomnuker@gmail.com>
parent 2ad1768c
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Showing with 167 additions and 189 deletions
libavcodec/opusenc_psy.c
View file @ 039ebaa5
......@@ -507,7 +507,7 @@ av_cold int ff_opus_psy_init(OpusPsyContext *s, AVCodecContext *avctx,
ret = AVERROR(ENOMEM);
goto fail;
}
ff_generate_window_func(s->window[i], 2*len, WFUNC_SINE, &tmp);
generate_window_func(s->window[i], 2*len, WFUNC_SINE, &tmp);
if ((ret = ff_mdct15_init(&s->mdct[i], 0, i + 3, 68 << (CELT_BLOCK_NB - 1 - i))))
goto fail;
}
......
libavfilter/Makefile
View file @ 039ebaa5
......@@ -37,7 +37,7 @@ OBJS-$(CONFIG_AECHO_FILTER) += af_aecho.o
OBJS-$(CONFIG_AEMPHASIS_FILTER) += af_aemphasis.o
OBJS-$(CONFIG_AEVAL_FILTER) += aeval.o
OBJS-$(CONFIG_AFADE_FILTER) += af_afade.o
OBJS-$(CONFIG_AFFTFILT_FILTER) += af_afftfilt.o window_func.o
OBJS-$(CONFIG_AFFTFILT_FILTER) += af_afftfilt.o
OBJS-$(CONFIG_AFIR_FILTER) += af_afir.o
OBJS-$(CONFIG_AFORMAT_FILTER) += af_aformat.o
OBJS-$(CONFIG_AGATE_FILTER) += af_agate.o
......@@ -369,13 +369,13 @@ OBJS-$(CONFIG_APHASEMETER_FILTER) += avf_aphasemeter.o
OBJS-$(CONFIG_AVECTORSCOPE_FILTER) += avf_avectorscope.o
OBJS-$(CONFIG_CONCAT_FILTER) += avf_concat.o
OBJS-$(CONFIG_SHOWCQT_FILTER) += avf_showcqt.o lswsutils.o lavfutils.o
OBJS-$(CONFIG_SHOWFREQS_FILTER) += avf_showfreqs.o window_func.o
OBJS-$(CONFIG_SHOWSPECTRUM_FILTER) += avf_showspectrum.o window_func.o
OBJS-$(CONFIG_SHOWSPECTRUMPIC_FILTER) += avf_showspectrum.o window_func.o
OBJS-$(CONFIG_SHOWFREQS_FILTER) += avf_showfreqs.o
OBJS-$(CONFIG_SHOWSPECTRUM_FILTER) += avf_showspectrum.o
OBJS-$(CONFIG_SHOWSPECTRUMPIC_FILTER) += avf_showspectrum.o
OBJS-$(CONFIG_SHOWVOLUME_FILTER) += avf_showvolume.o
OBJS-$(CONFIG_SHOWWAVES_FILTER) += avf_showwaves.o
OBJS-$(CONFIG_SHOWWAVESPIC_FILTER) += avf_showwaves.o
OBJS-$(CONFIG_SPECTRUMSYNTH_FILTER) += vaf_spectrumsynth.o window_func.o
OBJS-$(CONFIG_SPECTRUMSYNTH_FILTER) += vaf_spectrumsynth.o
# multimedia sources
OBJS-$(CONFIG_AMOVIE_FILTER) += src_movie.o
......
libavfilter/af_afftfilt.c
View file @ 039ebaa5
......@@ -166,7 +166,7 @@ static int config_input(AVFilterLink *inlink)
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
ff_generate_window_func(s->window_func_lut, s->window_size, s->win_func, &overlap);
generate_window_func(s->window_func_lut, s->window_size, s->win_func, &overlap);
if (s->overlap == 1)
s->overlap = overlap;
......
libavfilter/avf_showfreqs.c
View file @ 039ebaa5
......@@ -218,7 +218,7 @@ static int config_output(AVFilterLink *outlink)
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
ff_generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
if (s->overlap == 1.)
s->overlap = overlap;
s->hop_size = (1. - s->overlap) * s->win_size;
......
libavfilter/avf_showspectrum.c
View file @ 039ebaa5
......@@ -403,7 +403,7 @@ static int config_output(AVFilterLink *outlink)
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
ff_generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
if (s->overlap == 1)
s->overlap = overlap;
s->hop_size = (1. - s->overlap) * s->win_size;
......
libavfilter/vaf_spectrumsynth.c
View file @ 039ebaa5
......@@ -210,7 +210,7 @@ static int config_output(AVFilterLink *outlink)
sizeof(*s->window_func_lut));
if (!s->window_func_lut)
return AVERROR(ENOMEM);
ff_generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
if (s->overlap == 1)
s->overlap = overlap;
s->hop_size = (1 - s->overlap) * s->win_size;
......
libavfilter/window_func.c deleted 100644 → 0
View file @ 2ad1768c
/*
* Copyright (c) 2015 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <math.h>
#include "libavutil/avassert.h"
#include "window_func.h"
void ff_generate_window_func(float *lut, int N, int win_func, float *overlap)
{
int n;
switch (win_func) {
case WFUNC_RECT:
for (n = 0; n < N; n++)
lut[n] = 1.;
*overlap = 0.;
break;
case WFUNC_BARTLETT:
for (n = 0; n < N; n++)
lut[n] = 1.-fabs((n-(N-1)/2.)/((N-1)/2.));
*overlap = 0.5;
break;
case WFUNC_HANNING:
for (n = 0; n < N; n++)
lut[n] = .5*(1-cos(2*M_PI*n/(N-1)));
*overlap = 0.5;
break;
case WFUNC_HAMMING:
for (n = 0; n < N; n++)
lut[n] = .54-.46*cos(2*M_PI*n/(N-1));
*overlap = 0.5;
break;
case WFUNC_BLACKMAN:
for (n = 0; n < N; n++)
lut[n] = .42659-.49656*cos(2*M_PI*n/(N-1))+.076849*cos(4*M_PI*n/(N-1));
*overlap = 0.661;
break;
case WFUNC_WELCH:
for (n = 0; n < N; n++)
lut[n] = 1.-(n-(N-1)/2.)/((N-1)/2.)*(n-(N-1)/2.)/((N-1)/2.);
*overlap = 0.293;
break;
case WFUNC_FLATTOP:
for (n = 0; n < N; n++)
lut[n] = 1.-1.985844164102*cos( 2*M_PI*n/(N-1))+1.791176438506*cos( 4*M_PI*n/(N-1))-
1.282075284005*cos( 6*M_PI*n/(N-1))+0.667777530266*cos( 8*M_PI*n/(N-1))-
0.240160796576*cos(10*M_PI*n/(N-1))+0.056656381764*cos(12*M_PI*n/(N-1))-
0.008134974479*cos(14*M_PI*n/(N-1))+0.000624544650*cos(16*M_PI*n/(N-1))-
0.000019808998*cos(18*M_PI*n/(N-1))+0.000000132974*cos(20*M_PI*n/(N-1));
*overlap = 0.841;
break;
case WFUNC_BHARRIS:
for (n = 0; n < N; n++)
lut[n] = 0.35875-0.48829*cos(2*M_PI*n/(N-1))+0.14128*cos(4*M_PI*n/(N-1))-0.01168*cos(6*M_PI*n/(N-1));
*overlap = 0.661;
break;
case WFUNC_BNUTTALL:
for (n = 0; n < N; n++)
lut[n] = 0.3635819-0.4891775*cos(2*M_PI*n/(N-1))+0.1365995*cos(4*M_PI*n/(N-1))-0.0106411*cos(6*M_PI*n/(N-1));
*overlap = 0.661;
break;
case WFUNC_BHANN:
for (n = 0; n < N; n++)
lut[n] = 0.62-0.48*fabs(n/(double)(N-1)-.5)-0.38*cos(2*M_PI*n/(N-1));
*overlap = 0.5;
break;
case WFUNC_SINE:
for (n = 0; n < N; n++)
lut[n] = sin(M_PI*n/(N-1));
*overlap = 0.75;
break;
case WFUNC_NUTTALL:
for (n = 0; n < N; n++)
lut[n] = 0.355768-0.487396*cos(2*M_PI*n/(N-1))+0.144232*cos(4*M_PI*n/(N-1))-0.012604*cos(6*M_PI*n/(N-1));
*overlap = 0.663;
break;
case WFUNC_LANCZOS:
#define SINC(x) (!(x)) ? 1 : sin(M_PI * (x))/(M_PI * (x));
for (n = 0; n < N; n++)
lut[n] = SINC((2.*n)/(N-1)-1);
*overlap = 0.75;
break;
case WFUNC_GAUSS:
#define SQR(x) ((x)*(x))
for (n = 0; n < N; n++)
lut[n] = exp(-0.5 * SQR((n-(N-1)/2)/(0.4*(N-1)/2.f)));
*overlap = 0.75;
break;
case WFUNC_TUKEY:
for (n = 0; n < N; n++) {
float M = (N-1)/2.;
if (FFABS(n - M) >= 0.3 * M) {
lut[n] = 0.5 * (1 + cos((M_PI*(FFABS(n - M) - 0.3 * M))/((1 - 0.3) * M)));
} else {
lut[n] = 1;
}
}
*overlap = 0.33;
break;
case WFUNC_DOLPH: {
double b = cosh(7.6009022095419887 / (N-1)), sum, t, c, norm = 0;
int j;
for (c = 1 - 1 / (b*b), n = (N-1) / 2; n >= 0; --n) {
for (sum = !n, b = t = j = 1; j <= n && sum != t; b *= (n-j) * (1./j), ++j)
t = sum, sum += (b *= c * (N - n - j) * (1./j));
sum /= (N - 1 - n), sum /= (norm = norm ? norm : sum);
lut[n] = sum;
lut[N - 1 - n] = sum;
}
*overlap = 0.5;}
break;
case WFUNC_CAUCHY:
for (n = 0; n < N; n++) {
double x = 2 * ((n / (double)(N - 1)) - .5);
if (x <= -.5 || x >= .5) {
lut[n] = 0;
} else {
lut[n] = FFMIN(1, fabs(1/(1+4*16*x*x)));
}
}
*overlap = 0.75;
break;
case WFUNC_PARZEN:
for (n = 0; n < N; n++) {
double x = 2 * ((n / (double)(N - 1)) - .5);
if (x > 0.25 && x <= 0.5) {
lut[n] = -2 * powf(-1 + 2 * x, 3);
} else if (x >= -.5 && x < -.25) {
lut[n] = 2 * powf(1 + 2 * x, 3);
} else if (x >= -.25 && x < 0) {
lut[n] = 1 - 24 * x * x - 48 * x * x * x;
} else if (x >= 0 && x <= .25) {
lut[n] = 1 - 24 * x * x + 48 * x * x * x;
} else {
lut[n] = 0;
}
}
*overlap = 0.75;
break;
case WFUNC_POISSON:
for (n = 0; n < N; n++) {
double x = 2 * ((n / (double)(N - 1)) - .5);
if (x >= 0 && x <= .5) {
lut[n] = exp(-6*x);
} else if (x < 0 && x >= -.5) {
lut[n] = exp(6*x);
} else {
lut[n] = 0;
}
}
*overlap = 0.75;
break;
default:
av_assert0(0);
}
}
libavfilter/window_func.h
View file @ 039ebaa5
......@@ -22,6 +22,9 @@
#ifndef AVFILTER_WINDOW_FUNC_H
#define AVFILTER_WINDOW_FUNC_H
#include <math.h>
#include "libavutil/avassert.h"
enum WindowFunc { WFUNC_RECT, WFUNC_HANNING, WFUNC_HAMMING, WFUNC_BLACKMAN,
WFUNC_BARTLETT, WFUNC_WELCH, WFUNC_FLATTOP,
WFUNC_BHARRIS, WFUNC_BNUTTALL, WFUNC_SINE, WFUNC_NUTTALL,
......@@ -29,6 +32,159 @@ enum WindowFunc { WFUNC_RECT, WFUNC_HANNING, WFUNC_HAMMING, WFUNC_BLACKMAN,
WFUNC_DOLPH, WFUNC_CAUCHY, WFUNC_PARZEN, WFUNC_POISSON,
NB_WFUNC };
void ff_generate_window_func(float *lut, int N, int win_func, float *overlap);
static inline void generate_window_func(float *lut, int N, int win_func,
float *overlap)
{
int n;
switch (win_func) {
case WFUNC_RECT:
for (n = 0; n < N; n++)
lut[n] = 1.;
*overlap = 0.;
break;
case WFUNC_BARTLETT:
for (n = 0; n < N; n++)
lut[n] = 1.-fabs((n-(N-1)/2.)/((N-1)/2.));
*overlap = 0.5;
break;
case WFUNC_HANNING:
for (n = 0; n < N; n++)
lut[n] = .5*(1-cos(2*M_PI*n/(N-1)));
*overlap = 0.5;
break;
case WFUNC_HAMMING:
for (n = 0; n < N; n++)
lut[n] = .54-.46*cos(2*M_PI*n/(N-1));
*overlap = 0.5;
break;
case WFUNC_BLACKMAN:
for (n = 0; n < N; n++)
lut[n] = .42659-.49656*cos(2*M_PI*n/(N-1))+.076849*cos(4*M_PI*n/(N-1));
*overlap = 0.661;
break;
case WFUNC_WELCH:
for (n = 0; n < N; n++)
lut[n] = 1.-(n-(N-1)/2.)/((N-1)/2.)*(n-(N-1)/2.)/((N-1)/2.);
*overlap = 0.293;
break;
case WFUNC_FLATTOP:
for (n = 0; n < N; n++)
lut[n] = 1.-1.985844164102*cos( 2*M_PI*n/(N-1))+1.791176438506*cos( 4*M_PI*n/(N-1))-
1.282075284005*cos( 6*M_PI*n/(N-1))+0.667777530266*cos( 8*M_PI*n/(N-1))-
0.240160796576*cos(10*M_PI*n/(N-1))+0.056656381764*cos(12*M_PI*n/(N-1))-
0.008134974479*cos(14*M_PI*n/(N-1))+0.000624544650*cos(16*M_PI*n/(N-1))-
0.000019808998*cos(18*M_PI*n/(N-1))+0.000000132974*cos(20*M_PI*n/(N-1));
*overlap = 0.841;
break;
case WFUNC_BHARRIS:
for (n = 0; n < N; n++)
lut[n] = 0.35875-0.48829*cos(2*M_PI*n/(N-1))+0.14128*cos(4*M_PI*n/(N-1))-0.01168*cos(6*M_PI*n/(N-1));
*overlap = 0.661;
break;
case WFUNC_BNUTTALL:
for (n = 0; n < N; n++)
lut[n] = 0.3635819-0.4891775*cos(2*M_PI*n/(N-1))+0.1365995*cos(4*M_PI*n/(N-1))-0.0106411*cos(6*M_PI*n/(N-1));
*overlap = 0.661;
break;
case WFUNC_BHANN:
for (n = 0; n < N; n++)
lut[n] = 0.62-0.48*fabs(n/(double)(N-1)-.5)-0.38*cos(2*M_PI*n/(N-1));
*overlap = 0.5;
break;
case WFUNC_SINE:
for (n = 0; n < N; n++)
lut[n] = sin(M_PI*n/(N-1));
*overlap = 0.75;
break;
case WFUNC_NUTTALL:
for (n = 0; n < N; n++)
lut[n] = 0.355768-0.487396*cos(2*M_PI*n/(N-1))+0.144232*cos(4*M_PI*n/(N-1))-0.012604*cos(6*M_PI*n/(N-1));
*overlap = 0.663;
break;
case WFUNC_LANCZOS:
#define SINC(x) (!(x)) ? 1 : sin(M_PI * (x))/(M_PI * (x));
for (n = 0; n < N; n++)
lut[n] = SINC((2.*n)/(N-1)-1);
*overlap = 0.75;
break;
case WFUNC_GAUSS:
#define SQR(x) ((x)*(x))
for (n = 0; n < N; n++)
lut[n] = exp(-0.5 * SQR((n-(N-1)/2)/(0.4*(N-1)/2.f)));
*overlap = 0.75;
break;
case WFUNC_TUKEY:
for (n = 0; n < N; n++) {
float M = (N-1)/2.;
if (FFABS(n - M) >= 0.3 * M) {
lut[n] = 0.5 * (1 + cos((M_PI*(FFABS(n - M) - 0.3 * M))/((1 - 0.3) * M)));
} else {
lut[n] = 1;
}
}
*overlap = 0.33;
break;
case WFUNC_DOLPH: {
double b = cosh(7.6009022095419887 / (N-1)), sum, t, c, norm = 0;
int j;
for (c = 1 - 1 / (b*b), n = (N-1) / 2; n >= 0; --n) {
for (sum = !n, b = t = j = 1; j <= n && sum != t; b *= (n-j) * (1./j), ++j)
t = sum, sum += (b *= c * (N - n - j) * (1./j));
sum /= (N - 1 - n), sum /= (norm = norm ? norm : sum);
lut[n] = sum;
lut[N - 1 - n] = sum;
}
*overlap = 0.5;}
break;
case WFUNC_CAUCHY:
for (n = 0; n < N; n++) {
double x = 2 * ((n / (double)(N - 1)) - .5);
if (x <= -.5 || x >= .5) {
lut[n] = 0;
} else {
lut[n] = FFMIN(1, fabs(1/(1+4*16*x*x)));
}
}
*overlap = 0.75;
break;
case WFUNC_PARZEN:
for (n = 0; n < N; n++) {
double x = 2 * ((n / (double)(N - 1)) - .5);
if (x > 0.25 && x <= 0.5) {
lut[n] = -2 * powf(-1 + 2 * x, 3);
} else if (x >= -.5 && x < -.25) {
lut[n] = 2 * powf(1 + 2 * x, 3);
} else if (x >= -.25 && x < 0) {
lut[n] = 1 - 24 * x * x - 48 * x * x * x;
} else if (x >= 0 && x <= .25) {
lut[n] = 1 - 24 * x * x + 48 * x * x * x;
} else {
lut[n] = 0;
}
}
*overlap = 0.75;
break;
case WFUNC_POISSON:
for (n = 0; n < N; n++) {
double x = 2 * ((n / (double)(N - 1)) - .5);
if (x >= 0 && x <= .5) {
lut[n] = exp(-6*x);
} else if (x < 0 && x >= -.5) {
lut[n] = exp(6*x);
} else {
lut[n] = 0;
}
}
*overlap = 0.75;
break;
default:
av_assert0(0);
}
}
#endif /* AVFILTER_WINDOW_FUNC_H */
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