mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
303 lines
10 KiB
C
303 lines
10 KiB
C
/*
|
|
* Copyright (C) 2001-2010 Krzysztof Foltman, Markus Schmidt, Thor Harald Johansen
|
|
*
|
|
* 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/channel_layout.h"
|
|
#include "libavutil/opt.h"
|
|
#include "avfilter.h"
|
|
#include "audio.h"
|
|
#include "formats.h"
|
|
|
|
typedef struct StereoToolsContext {
|
|
const AVClass *class;
|
|
|
|
int softclip;
|
|
int mute_l;
|
|
int mute_r;
|
|
int phase_l;
|
|
int phase_r;
|
|
int mode;
|
|
double slev;
|
|
double sbal;
|
|
double mlev;
|
|
double mpan;
|
|
double phase;
|
|
double base;
|
|
double delay;
|
|
double balance_in;
|
|
double balance_out;
|
|
double phase_sin_coef;
|
|
double phase_cos_coef;
|
|
double sc_level;
|
|
double inv_atan_shape;
|
|
double level_in;
|
|
double level_out;
|
|
|
|
double *buffer;
|
|
int length;
|
|
int pos;
|
|
} StereoToolsContext;
|
|
|
|
#define OFFSET(x) offsetof(StereoToolsContext, x)
|
|
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
|
|
static const AVOption stereotools_options[] = {
|
|
{ "level_in", "set level in", OFFSET(level_in), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
|
|
{ "level_out", "set level out", OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
|
|
{ "balance_in", "set balance in", OFFSET(balance_in), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
|
|
{ "balance_out", "set balance out", OFFSET(balance_out), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
|
|
{ "softclip", "enable softclip", OFFSET(softclip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
|
|
{ "mutel", "mute L", OFFSET(mute_l), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
|
|
{ "muter", "mute R", OFFSET(mute_r), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
|
|
{ "phasel", "phase L", OFFSET(phase_l), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
|
|
{ "phaser", "phase R", OFFSET(phase_r), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
|
|
{ "mode", "set stereo mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 6, A, "mode" },
|
|
{ "lr>lr", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "mode" },
|
|
{ "lr>ms", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "mode" },
|
|
{ "ms>lr", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, "mode" },
|
|
{ "lr>ll", 0, 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, A, "mode" },
|
|
{ "lr>rr", 0, 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, A, "mode" },
|
|
{ "lr>l+r", 0, 0, AV_OPT_TYPE_CONST, {.i64=5}, 0, 0, A, "mode" },
|
|
{ "lr>rl", 0, 0, AV_OPT_TYPE_CONST, {.i64=6}, 0, 0, A, "mode" },
|
|
{ "slev", "set side level", OFFSET(slev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
|
|
{ "sbal", "set side balance", OFFSET(sbal), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
|
|
{ "mlev", "set middle level", OFFSET(mlev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
|
|
{ "mpan", "set middle pan", OFFSET(mpan), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
|
|
{ "base", "set stereo base", OFFSET(base), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
|
|
{ "delay", "set delay", OFFSET(delay), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -20, 20, A },
|
|
{ "sclevel", "set S/C level", OFFSET(sc_level), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 100, A },
|
|
{ "phase", "set stereo phase", OFFSET(phase), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 360, A },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(stereotools);
|
|
|
|
static int query_formats(AVFilterContext *ctx)
|
|
{
|
|
AVFilterFormats *formats = NULL;
|
|
AVFilterChannelLayouts *layout = NULL;
|
|
|
|
ff_add_format(&formats, AV_SAMPLE_FMT_DBL);
|
|
ff_set_common_formats(ctx, formats);
|
|
ff_add_channel_layout(&layout, AV_CH_LAYOUT_STEREO);
|
|
ff_set_common_channel_layouts(ctx, layout);
|
|
|
|
formats = ff_all_samplerates();
|
|
if (!formats)
|
|
return AVERROR(ENOMEM);
|
|
|
|
return ff_set_common_samplerates(ctx, formats);
|
|
}
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
StereoToolsContext *s = ctx->priv;
|
|
|
|
s->length = 2 * inlink->sample_rate * 0.05;
|
|
s->buffer = av_calloc(s->length, sizeof(*s->buffer));
|
|
if (!s->buffer)
|
|
return AVERROR(ENOMEM);
|
|
|
|
s->inv_atan_shape = 1.0 / atan(s->sc_level);
|
|
s->phase_cos_coef = cos(s->phase / 180 * M_PI);
|
|
s->phase_sin_coef = sin(s->phase / 180 * M_PI);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
StereoToolsContext *s = ctx->priv;
|
|
const double *src = (const double *)in->data[0];
|
|
const double sb = s->base < 0 ? s->base * 0.5 : s->base;
|
|
const double sbal = 1 + s->sbal;
|
|
const double mpan = 1 + s->mpan;
|
|
const double slev = s->slev;
|
|
const double mlev = s->mlev;
|
|
const double balance_in = s->balance_in;
|
|
const double balance_out = s->balance_out;
|
|
const double level_in = s->level_in;
|
|
const double level_out = s->level_out;
|
|
const double sc_level = s->sc_level;
|
|
const double delay = s->delay;
|
|
const int length = s->length;
|
|
const int mute_l = floor(s->mute_l + 0.5);
|
|
const int mute_r = floor(s->mute_r + 0.5);
|
|
const int phase_l = floor(s->phase_l + 0.5);
|
|
const int phase_r = floor(s->phase_r + 0.5);
|
|
double *buffer = s->buffer;
|
|
AVFrame *out = NULL;
|
|
double *dst;
|
|
int nbuf = inlink->sample_rate * (FFABS(delay) / 1000.);
|
|
int n;
|
|
|
|
nbuf -= nbuf % 2;
|
|
if (av_frame_is_writable(in)) {
|
|
out = in;
|
|
} else {
|
|
AVFrame *out = ff_get_audio_buffer(inlink, in->nb_samples);
|
|
if (!out) {
|
|
av_frame_free(&in);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
av_frame_copy_props(out, in);
|
|
}
|
|
dst = (double *)out->data[0];
|
|
|
|
for (n = 0; n < in->nb_samples; n++, src += 2, dst += 2) {
|
|
double L = src[0], R = src[1], l, r, m, S;
|
|
|
|
L *= level_in;
|
|
R *= level_in;
|
|
|
|
L *= 1. - FFMAX(0., balance_in);
|
|
R *= 1. + FFMIN(0., balance_in);
|
|
|
|
if (s->softclip) {
|
|
R = s->inv_atan_shape * atan(R * sc_level);
|
|
L = s->inv_atan_shape * atan(L * sc_level);
|
|
}
|
|
|
|
switch (s->mode) {
|
|
case 0:
|
|
m = (L + R) * 0.5;
|
|
S = (L - R) * 0.5;
|
|
l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal);
|
|
r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal);
|
|
L = l;
|
|
R = r;
|
|
break;
|
|
case 1:
|
|
l = L * FFMIN(1., 2. - sbal);
|
|
r = R * FFMIN(1., sbal);
|
|
L = 0.5 * (l + r) * mlev;
|
|
R = 0.5 * (l - r) * slev;
|
|
break;
|
|
case 2:
|
|
l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal);
|
|
r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal);
|
|
L = l;
|
|
R = r;
|
|
break;
|
|
case 3:
|
|
R = L;
|
|
break;
|
|
case 4:
|
|
L = R;
|
|
break;
|
|
case 5:
|
|
L = (L + R) / 2;
|
|
R = L;
|
|
break;
|
|
case 6:
|
|
l = L;
|
|
L = R;
|
|
R = l;
|
|
m = (L + R) * 0.5;
|
|
S = (L - R) * 0.5;
|
|
l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal);
|
|
r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal);
|
|
L = l;
|
|
R = r;
|
|
break;
|
|
}
|
|
|
|
L *= 1. - mute_l;
|
|
R *= 1. - mute_r;
|
|
|
|
L *= (2. * (1. - phase_l)) - 1.;
|
|
R *= (2. * (1. - phase_r)) - 1.;
|
|
|
|
buffer[s->pos ] = L;
|
|
buffer[s->pos+1] = R;
|
|
|
|
if (delay > 0.) {
|
|
R = buffer[(s->pos - (int)nbuf + 1 + length) % length];
|
|
} else if (delay < 0.) {
|
|
L = buffer[(s->pos - (int)nbuf + length) % length];
|
|
}
|
|
|
|
l = L + sb * L - sb * R;
|
|
r = R + sb * R - sb * L;
|
|
|
|
L = l;
|
|
R = r;
|
|
|
|
l = L * s->phase_cos_coef - R * s->phase_sin_coef;
|
|
r = L * s->phase_sin_coef + R * s->phase_cos_coef;
|
|
|
|
L = l;
|
|
R = r;
|
|
|
|
s->pos = (s->pos + 2) % s->length;
|
|
|
|
L *= 1. - FFMAX(0., balance_out);
|
|
R *= 1. + FFMIN(0., balance_out);
|
|
|
|
L *= level_out;
|
|
R *= level_out;
|
|
|
|
dst[0] = L;
|
|
dst[1] = R;
|
|
}
|
|
|
|
if (out != in)
|
|
av_frame_free(&in);
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
StereoToolsContext *s = ctx->priv;
|
|
|
|
av_freep(&s->buffer);
|
|
}
|
|
|
|
static const AVFilterPad inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.filter_frame = filter_frame,
|
|
.config_props = config_input,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_af_stereotools = {
|
|
.name = "stereotools",
|
|
.description = NULL_IF_CONFIG_SMALL("Apply various stereo tools."),
|
|
.query_formats = query_formats,
|
|
.priv_size = sizeof(StereoToolsContext),
|
|
.priv_class = &stereotools_class,
|
|
.uninit = uninit,
|
|
.inputs = inputs,
|
|
.outputs = outputs,
|
|
};
|