virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-23 12:43:46 +02:00
Code Issues Releases Activity

avfilter/af_dialoguenhance: add double-floating point sample format support

Browse Source
This commit is contained in:
Paul B Mahol 2023-12-04 22:17:20 +01:00
parent 704ef556fe
commit 9e74c7ae87
2 changed files with 300 additions and 203 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

229
libavfilter/af_dialoguenhance.c
View File

@ -26,7 +26,6 @@
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "window_func.h"
#include <float.h>
@ -38,8 +37,11 @@ typedef struct AudioDialogueEnhancementContext {
int fft_size;
int overlap;
float *window;
float prev_vad;
void *window;
float *window_float;
double *window_double;
float prev_vad_float;
double prev_vad_double;
AVFrame *in;
AVFrame *in_frame;
@ -49,6 +51,8 @@ typedef struct AudioDialogueEnhancementContext {
AVFrame *windowed_prev;
AVFrame *center_frame;
int (*de_stereo)(AVFilterContext *ctx, AVFrame *out);
AVTXContext *tx_ctx[2], *itx_ctx;
av_tx_fn tx_fn, itx_fn;
} AudioDialogueEnhanceContext;
@ -72,6 +76,7 @@ static int query_formats(AVFilterContext *ctx)
int ret;
if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_FLTP )) < 0 ||
(ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBLP )) < 0 ||
(ret = ff_set_common_formats (ctx , formats )) < 0 ||
(ret = ff_add_channel_layout (&in_layout , &(AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO)) < 0 ||
(ret = ff_channel_layouts_ref(in_layout, &ctx->inputs[0]->outcfg.channel_layouts)) < 0 ||
@ -82,20 +87,22 @@ static int query_formats(AVFilterContext *ctx)
return ff_set_common_all_samplerates(ctx);
}
#define DEPTH 32
#include "dialoguenhance_template.c"
#undef DEPTH
#define DEPTH 64
#include "dialoguenhance_template.c"
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
AudioDialogueEnhanceContext *s = ctx->priv;
float scale = 1.f, iscale, overlap;
int ret;
s->fft_size = inlink->sample_rate > 100000 ? 8192 : inlink->sample_rate > 50000 ? 4096 : 2048;
s->overlap = s->fft_size / 4;
s->window = av_calloc(s->fft_size, sizeof(*s->window));
if (!s->window)
return AVERROR(ENOMEM);
s->in_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
s->center_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
s->out_dist_frame = ff_get_audio_buffer(inlink, (s->fft_size + 2) * 2);
@ -106,202 +113,18 @@ static int config_input(AVFilterLink *inlink)
!s->out_dist_frame || !s->windowed_frame || !s->center_frame)
return AVERROR(ENOMEM);
generate_window_func(s->window, s->fft_size, WFUNC_SINE, &overlap);
iscale = 1.f / (s->fft_size * 1.5f);
ret = av_tx_init(&s->tx_ctx[0], &s->tx_fn, AV_TX_FLOAT_RDFT, 0, s->fft_size, &scale, 0);
if (ret < 0)
return ret;
ret = av_tx_init(&s->tx_ctx[1], &s->tx_fn, AV_TX_FLOAT_RDFT, 0, s->fft_size, &scale, 0);
if (ret < 0)
return ret;
ret = av_tx_init(&s->itx_ctx, &s->itx_fn, AV_TX_FLOAT_RDFT, 1, s->fft_size, &iscale, 0);
if (ret < 0)
return ret;
return 0;
}
static void apply_window(AudioDialogueEnhanceContext *s,
const float *in_frame, float *out_frame, const int add_to_out_frame)
{
const float *window = s->window;
if (add_to_out_frame) {
for (int i = 0; i < s->fft_size; i++)
out_frame[i] += in_frame[i] * window[i];
} else {
for (int i = 0; i < s->fft_size; i++)
out_frame[i] = in_frame[i] * window[i];
}
}
static float sqrf(float x)
{
return x * x;
}
static void get_centere(AVComplexFloat *left, AVComplexFloat *right,
AVComplexFloat *center, int N)
{
for (int i = 0; i < N; i++) {
const float l_re = left[i].re;
const float l_im = left[i].im;
const float r_re = right[i].re;
const float r_im = right[i].im;
const float a = 0.5f * (1.f - sqrtf((sqrf(l_re - r_re) + sqrf(l_im - r_im))/
(sqrf(l_re + r_re) + sqrf(l_im + r_im) + FLT_EPSILON)));
center[i].re = a * (l_re + r_re);
center[i].im = a * (l_im + r_im);
}
}
static float flux(float *curf, float *prevf, int N)
{
AVComplexFloat *cur = (AVComplexFloat *)curf;
AVComplexFloat *prev = (AVComplexFloat *)prevf;
float sum = 0.f;
for (int i = 0; i < N; i++) {
float c_re = cur[i].re;
float c_im = cur[i].im;
float p_re = prev[i].re;
float p_im = prev[i].im;
sum += sqrf(hypotf(c_re, c_im) - hypotf(p_re, p_im));
switch (inlink->format) {
case AV_SAMPLE_FMT_FLTP:
s->de_stereo = de_stereo_float;
ret = de_tx_init_float(ctx);
break;
case AV_SAMPLE_FMT_DBLP:
s->de_stereo = de_stereo_double;
ret = de_tx_init_double(ctx);
break;
}
return sum;
}
static float fluxlr(float *lf, float *lpf,
float *rf, float *rpf,
int N)
{
AVComplexFloat *l = (AVComplexFloat *)lf;
AVComplexFloat *lp = (AVComplexFloat *)lpf;
AVComplexFloat *r = (AVComplexFloat *)rf;
AVComplexFloat *rp = (AVComplexFloat *)rpf;
float sum = 0.f;
for (int i = 0; i < N; i++) {
float c_re = l[i].re - r[i].re;
float c_im = l[i].im - r[i].im;
float p_re = lp[i].re - rp[i].re;
float p_im = lp[i].im - rp[i].im;
sum += sqrf(hypotf(c_re, c_im) - hypotf(p_re, p_im));
}
return sum;
}
static float calc_vad(float fc, float flr, float a)
{
const float vad = a * (fc / (fc + flr) - 0.5f);
return av_clipf(vad, 0.f, 1.f);
}
static void get_final(float *c, float *l,
float *r, float vad, int N,
float original, float enhance)
{
AVComplexFloat *center = (AVComplexFloat *)c;
AVComplexFloat *left = (AVComplexFloat *)l;
AVComplexFloat *right = (AVComplexFloat *)r;
for (int i = 0; i < N; i++) {
float cP = sqrf(center[i].re) + sqrf(center[i].im);
float lrP = sqrf(left[i].re - right[i].re) + sqrf(left[i].im - right[i].im);
float G = cP / (cP + lrP + FLT_EPSILON);
float re, im;
re = center[i].re * (original + vad * G * enhance);
im = center[i].im * (original + vad * G * enhance);
center[i].re = re;
center[i].im = im;
}
}
static int de_stereo(AVFilterContext *ctx, AVFrame *out)
{
AudioDialogueEnhanceContext *s = ctx->priv;
float *center = (float *)s->center_frame->extended_data[0];
float *center_prev = (float *)s->center_frame->extended_data[1];
float *left_in = (float *)s->in_frame->extended_data[0];
float *right_in = (float *)s->in_frame->extended_data[1];
float *left_out = (float *)s->out_dist_frame->extended_data[0];
float *right_out = (float *)s->out_dist_frame->extended_data[1];
float *left_samples = (float *)s->in->extended_data[0];
float *right_samples = (float *)s->in->extended_data[1];
float *windowed_left = (float *)s->windowed_frame->extended_data[0];
float *windowed_right = (float *)s->windowed_frame->extended_data[1];
float *windowed_oleft = (float *)s->windowed_out->extended_data[0];
float *windowed_oright = (float *)s->windowed_out->extended_data[1];
float *windowed_pleft = (float *)s->windowed_prev->extended_data[0];
float *windowed_pright = (float *)s->windowed_prev->extended_data[1];
float *left_osamples = (float *)out->extended_data[0];
float *right_osamples = (float *)out->extended_data[1];
float *center_osamples = (float *)out->extended_data[2];
const int overlap = s->overlap;
const int offset = s->fft_size - overlap;
const int nb_samples = FFMIN(overlap, s->in->nb_samples);
float vad;
// shift in/out buffers
memmove(left_in, &left_in[overlap], offset * sizeof(float));
memmove(right_in, &right_in[overlap], offset * sizeof(float));
memmove(left_out, &left_out[overlap], offset * sizeof(float));
memmove(right_out, &right_out[overlap], offset * sizeof(float));
memcpy(&left_in[offset], left_samples, nb_samples * sizeof(float));
memcpy(&right_in[offset], right_samples, nb_samples * sizeof(float));
memset(&left_out[offset], 0, overlap * sizeof(float));
memset(&right_out[offset], 0, overlap * sizeof(float));
apply_window(s, left_in, windowed_left, 0);
apply_window(s, right_in, windowed_right, 0);
s->tx_fn(s->tx_ctx[0], windowed_oleft, windowed_left, sizeof(float));
s->tx_fn(s->tx_ctx[1], windowed_oright, windowed_right, sizeof(float));
get_centere((AVComplexFloat *)windowed_oleft,
(AVComplexFloat *)windowed_oright,
(AVComplexFloat *)center,
s->fft_size / 2 + 1);
vad = calc_vad(flux(center, center_prev, s->fft_size / 2 + 1),
fluxlr(windowed_oleft, windowed_pleft,
windowed_oright, windowed_pright, s->fft_size / 2 + 1), s->voice);
vad = vad * 0.1 + 0.9 * s->prev_vad;
s->prev_vad = vad;
memcpy(center_prev, center, s->fft_size * sizeof(float));
memcpy(windowed_pleft, windowed_oleft, s->fft_size * sizeof(float));
memcpy(windowed_pright, windowed_oright, s->fft_size * sizeof(float));
get_final(center, windowed_oleft, windowed_oright, vad, s->fft_size / 2 + 1,
s->original, s->enhance);
s->itx_fn(s->itx_ctx, windowed_oleft, center, sizeof(AVComplexFloat));
apply_window(s, windowed_oleft, left_out, 1);
memcpy(left_osamples, left_in, overlap * sizeof(float));
memcpy(right_osamples, right_in, overlap * sizeof(float));
if (ctx->is_disabled)
memset(center_osamples, 0, overlap * sizeof(float));
else
memcpy(center_osamples, left_out, overlap * sizeof(float));
return 0;
return ret;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
@ -319,7 +142,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
}
s->in = in;
de_stereo(ctx, out);
s->de_stereo(ctx, out);
av_frame_copy_props(out, in);
out->nb_samples = in->nb_samples;

274
libavfilter/dialoguenhance_template.c Normal file
View File

@ -0,0 +1,274 @@
/*
* 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 "libavutil/tx.h"
#include "avfilter.h"
#include "internal.h"
#include "audio.h"
#undef ctype
#undef ftype
#undef SQRT
#undef HYPOT
#undef SAMPLE_FORMAT
#undef TX_TYPE
#undef ONE
#undef ZERO
#undef HALF
#undef SIN
#undef CLIP
#undef EPSILON
#if DEPTH == 32
#define SAMPLE_FORMAT float
#define SQRT sqrtf
#define HYPOT hypotf
#define ctype AVComplexFloat
#define ftype float
#define TX_TYPE AV_TX_FLOAT_RDFT
#define ONE 1.f
#define ZERO 0.f
#define HALF 0.5f
#define SIN sinf
#define CLIP av_clipf
#define EPSILON FLT_EPSILON
#else
#define SAMPLE_FORMAT double
#define SQRT sqrt
#define HYPOT hypot
#define ctype AVComplexDouble
#define ftype double
#define TX_TYPE AV_TX_DOUBLE_RDFT
#define ONE 1.0
#define ZERO 0.0
#define HALF 0.5
#define SIN sin
#define CLIP av_clipd
#define EPSILON DBL_EPSILON
#endif
#define fn3(a,b) a##_##b
#define fn2(a,b) fn3(a,b)
#define fn(a) fn2(a, SAMPLE_FORMAT)
static int fn(de_tx_init)(AVFilterContext *ctx)
{
AudioDialogueEnhanceContext *s = ctx->priv;
ftype scale = ONE, iscale = ONE / (s->fft_size * 1.5f);
int ret;
s->window = av_calloc(s->fft_size, sizeof(ftype));
if (!s->window)
return AVERROR(ENOMEM);
fn(s->window) = s->window;
for (int n = 0; n < s->fft_size; n++)
fn(s->window)[n] = SIN(M_PI*n/(s->fft_size-1));
ret = av_tx_init(&s->tx_ctx[0], &s->tx_fn, TX_TYPE, 0, s->fft_size, &scale, 0);
if (ret < 0)
return ret;
ret = av_tx_init(&s->tx_ctx[1], &s->tx_fn, TX_TYPE, 0, s->fft_size, &scale, 0);
if (ret < 0)
return ret;
ret = av_tx_init(&s->itx_ctx, &s->itx_fn, TX_TYPE, 1, s->fft_size, &iscale, 0);
if (ret < 0)
return ret;
return 0;
}
static void fn(apply_window)(AudioDialogueEnhanceContext *s,
const ftype *in_frame, ftype *out_frame, const int add_to_out_frame)
{
const ftype *window = fn(s->window);
const int fft_size = s->fft_size;
if (add_to_out_frame) {
for (int i = 0; i < fft_size; i++)
out_frame[i] += in_frame[i] * window[i];
} else {
for (int i = 0; i < fft_size; i++)
out_frame[i] = in_frame[i] * window[i];
}
}
static ftype fn(sqr)(ftype x)
{
return x * x;
}
static void fn(get_centere)(ctype *left, ctype *right,
ctype *center, int N)
{
for (int i = 0; i < N; i++) {
const ftype l_re = left[i].re;
const ftype l_im = left[i].im;
const ftype r_re = right[i].re;
const ftype r_im = right[i].im;
const ftype a = HALF * (ONE - SQRT((fn(sqr)(l_re - r_re) + fn(sqr)(l_im - r_im))/
(fn(sqr)(l_re + r_re) + fn(sqr)(l_im + r_im) + EPSILON)));
center[i].re = a * (l_re + r_re);
center[i].im = a * (l_im + r_im);
}
}
static ftype fn(flux)(ftype *curf, ftype *prevf, int N)
{
ctype *cur = (ctype *)curf;
ctype *prev = (ctype *)prevf;
ftype sum = ZERO;
for (int i = 0; i < N; i++) {
ftype c_re = cur[i].re;
ftype c_im = cur[i].im;
ftype p_re = prev[i].re;
ftype p_im = prev[i].im;
sum += fn(sqr)(HYPOT(c_re, c_im) - HYPOT(p_re, p_im));
}
return sum;
}
static ftype fn(fluxlr)(ftype *lf, ftype *lpf,
ftype *rf, ftype *rpf,
int N)
{
ctype *l = (ctype *)lf;
ctype *lp = (ctype *)lpf;
ctype *r = (ctype *)rf;
ctype *rp = (ctype *)rpf;
ftype sum = ZERO;
for (int i = 0; i < N; i++) {
ftype c_re = l[i].re - r[i].re;
ftype c_im = l[i].im - r[i].im;
ftype p_re = lp[i].re - rp[i].re;
ftype p_im = lp[i].im - rp[i].im;
sum += fn(sqr)(HYPOT(c_re, c_im) - HYPOT(p_re, p_im));
}
return sum;
}
static ftype fn(calc_vad)(ftype fc, ftype flr, ftype a)
{
const ftype vad = a * (fc / (fc + flr) - HALF);
return CLIP(vad, ZERO, ONE);
}
static void fn(get_final)(ftype *c, ftype *l,
ftype *r, ftype vad, int N,
ftype original, ftype enhance)
{
ctype *center = (ctype *)c;
ctype *left = (ctype *)l;
ctype *right = (ctype *)r;
for (int i = 0; i < N; i++) {
ftype cP = fn(sqr)(center[i].re) + fn(sqr)(center[i].im);
ftype lrP = fn(sqr)(left[i].re - right[i].re) + fn(sqr)(left[i].im - right[i].im);
ftype G = cP / (cP + lrP + EPSILON);
ftype re, im;
re = center[i].re * (original + vad * G * enhance);
im = center[i].im * (original + vad * G * enhance);
center[i].re = re;
center[i].im = im;
}
}
static int fn(de_stereo)(AVFilterContext *ctx, AVFrame *out)
{
AudioDialogueEnhanceContext *s = ctx->priv;
ftype *center = (ftype *)s->center_frame->extended_data[0];
ftype *center_prev = (ftype *)s->center_frame->extended_data[1];
ftype *left_in = (ftype *)s->in_frame->extended_data[0];
ftype *right_in = (ftype *)s->in_frame->extended_data[1];
ftype *left_out = (ftype *)s->out_dist_frame->extended_data[0];
ftype *right_out = (ftype *)s->out_dist_frame->extended_data[1];
ftype *left_samples = (ftype *)s->in->extended_data[0];
ftype *right_samples = (ftype *)s->in->extended_data[1];
ftype *windowed_left = (ftype *)s->windowed_frame->extended_data[0];
ftype *windowed_right = (ftype *)s->windowed_frame->extended_data[1];
ftype *windowed_oleft = (ftype *)s->windowed_out->extended_data[0];
ftype *windowed_oright = (ftype *)s->windowed_out->extended_data[1];
ftype *windowed_pleft = (ftype *)s->windowed_prev->extended_data[0];
ftype *windowed_pright = (ftype *)s->windowed_prev->extended_data[1];
ftype *left_osamples = (ftype *)out->extended_data[0];
ftype *right_osamples = (ftype *)out->extended_data[1];
ftype *center_osamples = (ftype *)out->extended_data[2];
const int overlap = s->overlap;
const int offset = s->fft_size - overlap;
const int nb_samples = FFMIN(overlap, s->in->nb_samples);
ftype vad;
// shift in/out buffers
memmove(left_in, &left_in[overlap], offset * sizeof(ftype));
memmove(right_in, &right_in[overlap], offset * sizeof(ftype));
memmove(left_out, &left_out[overlap], offset * sizeof(ftype));
memmove(right_out, &right_out[overlap], offset * sizeof(ftype));
memcpy(&left_in[offset], left_samples, nb_samples * sizeof(ftype));
memcpy(&right_in[offset], right_samples, nb_samples * sizeof(ftype));
memset(&left_out[offset], 0, overlap * sizeof(ftype));
memset(&right_out[offset], 0, overlap * sizeof(ftype));
fn(apply_window)(s, left_in, windowed_left, 0);
fn(apply_window)(s, right_in, windowed_right, 0);
s->tx_fn(s->tx_ctx[0], windowed_oleft, windowed_left, sizeof(ftype));
s->tx_fn(s->tx_ctx[1], windowed_oright, windowed_right, sizeof(ftype));
fn(get_centere)((ctype *)windowed_oleft,
(ctype *)windowed_oright,
(ctype *)center,
s->fft_size / 2 + 1);
vad = fn(calc_vad)(fn(flux)(center, center_prev, s->fft_size / 2 + 1),
fn(fluxlr)(windowed_oleft, windowed_pleft,
windowed_oright, windowed_pright, s->fft_size / 2 + 1), s->voice);
vad = vad * 0.1 + 0.9 * fn(s->prev_vad);
fn(s->prev_vad) = vad;
memcpy(center_prev, center, s->fft_size * sizeof(ftype));
memcpy(windowed_pleft, windowed_oleft, s->fft_size * sizeof(ftype));
memcpy(windowed_pright, windowed_oright, s->fft_size * sizeof(ftype));
fn(get_final)(center, windowed_oleft, windowed_oright, vad, s->fft_size / 2 + 1,
s->original, s->enhance);
s->itx_fn(s->itx_ctx, windowed_oleft, center, sizeof(ctype));
fn(apply_window)(s, windowed_oleft, left_out, 1);
memcpy(left_osamples, left_in, overlap * sizeof(ftype));
memcpy(right_osamples, right_in, overlap * sizeof(ftype));
if (ctx->is_disabled)
memset(center_osamples, 0, overlap * sizeof(ftype));
else
memcpy(center_osamples, left_out, overlap * sizeof(ftype));
return 0;
}