mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
207 lines
7.0 KiB
207 lines
7.0 KiB
/* |
|
* Copyright (c) 2018 Chris Johnson |
|
* |
|
* Permission is hereby granted, free of charge, to any person obtaining a copy |
|
* of this software and associated documentation files (the "Software"), to deal |
|
* in the Software without restriction, including without limitation the rights |
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
|
* copies of the Software, and to permit persons to whom the Software is |
|
* furnished to do so, subject to the following conditions: |
|
* |
|
* The above copyright notice and this permission notice shall be included in all |
|
* copies or substantial portions of the Software. |
|
* |
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
|
* SOFTWARE. |
|
*/ |
|
|
|
#include "libavutil/channel_layout.h" |
|
#include "libavutil/mem.h" |
|
#include "libavutil/opt.h" |
|
#include "avfilter.h" |
|
#include "audio.h" |
|
#include "filters.h" |
|
|
|
typedef struct DeesserChannel { |
|
double s1, s2, s3; |
|
double m1, m2; |
|
double ratioA, ratioB; |
|
double iirSampleA, iirSampleB; |
|
int flip; |
|
} DeesserChannel; |
|
|
|
typedef struct DeesserContext { |
|
const AVClass *class; |
|
|
|
double intensity; |
|
double max; |
|
double frequency; |
|
int mode; |
|
|
|
DeesserChannel *chan; |
|
} DeesserContext; |
|
|
|
enum OutModes { |
|
IN_MODE, |
|
OUT_MODE, |
|
ESS_MODE, |
|
NB_MODES |
|
}; |
|
|
|
#define OFFSET(x) offsetof(DeesserContext, x) |
|
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
|
|
|
static const AVOption deesser_options[] = { |
|
{ "i", "set intensity", OFFSET(intensity), AV_OPT_TYPE_DOUBLE, {.dbl=0.0}, 0.0, 1.0, A }, |
|
{ "m", "set max deessing", OFFSET(max), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0.0, 1.0, A }, |
|
{ "f", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0.0, 1.0, A }, |
|
{ "s", "set output mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=OUT_MODE}, 0, NB_MODES-1, A, .unit = "mode" }, |
|
{ "i", "input", 0, AV_OPT_TYPE_CONST, {.i64=IN_MODE}, 0, 0, A, .unit = "mode" }, |
|
{ "o", "output", 0, AV_OPT_TYPE_CONST, {.i64=OUT_MODE}, 0, 0, A, .unit = "mode" }, |
|
{ "e", "ess", 0, AV_OPT_TYPE_CONST, {.i64=ESS_MODE}, 0, 0, A, .unit = "mode" }, |
|
{ NULL } |
|
}; |
|
|
|
AVFILTER_DEFINE_CLASS(deesser); |
|
|
|
static int config_input(AVFilterLink *inlink) |
|
{ |
|
AVFilterContext *ctx = inlink->dst; |
|
DeesserContext *s = ctx->priv; |
|
|
|
s->chan = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->chan)); |
|
if (!s->chan) |
|
return AVERROR(ENOMEM); |
|
|
|
for (int i = 0; i < inlink->ch_layout.nb_channels; i++) { |
|
DeesserChannel *chan = &s->chan[i]; |
|
|
|
chan->ratioA = chan->ratioB = 1.0; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
|
{ |
|
AVFilterContext *ctx = inlink->dst; |
|
AVFilterLink *outlink = ctx->outputs[0]; |
|
DeesserContext *s = ctx->priv; |
|
AVFrame *out; |
|
|
|
if (av_frame_is_writable(in)) { |
|
out = in; |
|
} else { |
|
out = ff_get_audio_buffer(outlink, in->nb_samples); |
|
if (!out) { |
|
av_frame_free(&in); |
|
return AVERROR(ENOMEM); |
|
} |
|
av_frame_copy_props(out, in); |
|
} |
|
|
|
for (int ch = 0; ch < inlink->ch_layout.nb_channels; ch++) { |
|
DeesserChannel *dec = &s->chan[ch]; |
|
double *src = (double *)in->extended_data[ch]; |
|
double *dst = (double *)out->extended_data[ch]; |
|
double overallscale = inlink->sample_rate < 44100 ? 44100.0 / inlink->sample_rate : inlink->sample_rate / 44100.0; |
|
double intensity = pow(s->intensity, 5) * (8192 / overallscale); |
|
double maxdess = 1.0 / pow(10.0, ((s->max - 1.0) * 48.0) / 20); |
|
double iirAmount = pow(s->frequency, 2) / overallscale; |
|
double offset; |
|
double sense; |
|
double recovery; |
|
double attackspeed; |
|
|
|
for (int i = 0; i < in->nb_samples; i++) { |
|
double sample = src[i]; |
|
|
|
dec->s3 = dec->s2; |
|
dec->s2 = dec->s1; |
|
dec->s1 = sample; |
|
dec->m1 = (dec->s1 - dec->s2) * ((dec->s1 - dec->s2) / 1.3); |
|
dec->m2 = (dec->s2 - dec->s3) * ((dec->s1 - dec->s2) / 1.3); |
|
sense = (dec->m1 - dec->m2) * ((dec->m1 - dec->m2) / 1.3); |
|
attackspeed = 7.0 + sense * 1024; |
|
|
|
sense = 1.0 + intensity * intensity * sense; |
|
sense = FFMIN(sense, intensity); |
|
recovery = 1.0 + (0.01 / sense); |
|
|
|
offset = 1.0 - fabs(sample); |
|
|
|
if (dec->flip) { |
|
dec->iirSampleA = (dec->iirSampleA * (1.0 - (offset * iirAmount))) + |
|
(sample * (offset * iirAmount)); |
|
if (dec->ratioA < sense) { |
|
dec->ratioA = ((dec->ratioA * attackspeed) + sense) / (attackspeed + 1.0); |
|
} else { |
|
dec->ratioA = 1.0 + ((dec->ratioA - 1.0) / recovery); |
|
} |
|
|
|
dec->ratioA = FFMIN(dec->ratioA, maxdess); |
|
sample = dec->iirSampleA + ((sample - dec->iirSampleA) / dec->ratioA); |
|
} else { |
|
dec->iirSampleB = (dec->iirSampleB * (1.0 - (offset * iirAmount))) + |
|
(sample * (offset * iirAmount)); |
|
if (dec->ratioB < sense) { |
|
dec->ratioB = ((dec->ratioB * attackspeed) + sense) / (attackspeed + 1.0); |
|
} else { |
|
dec->ratioB = 1.0 + ((dec->ratioB - 1.0) / recovery); |
|
} |
|
|
|
dec->ratioB = FFMIN(dec->ratioB, maxdess); |
|
sample = dec->iirSampleB + ((sample - dec->iirSampleB) / dec->ratioB); |
|
} |
|
|
|
dec->flip = !dec->flip; |
|
|
|
if (ctx->is_disabled) |
|
sample = src[i]; |
|
|
|
switch (s->mode) { |
|
case IN_MODE: dst[i] = src[i]; break; |
|
case OUT_MODE: dst[i] = sample; break; |
|
case ESS_MODE: dst[i] = src[i] - sample; break; |
|
} |
|
} |
|
} |
|
|
|
if (out != in) |
|
av_frame_free(&in); |
|
|
|
return ff_filter_frame(outlink, out); |
|
} |
|
|
|
static av_cold void uninit(AVFilterContext *ctx) |
|
{ |
|
DeesserContext *s = ctx->priv; |
|
|
|
av_freep(&s->chan); |
|
} |
|
|
|
static const AVFilterPad inputs[] = { |
|
{ |
|
.name = "default", |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
.filter_frame = filter_frame, |
|
.config_props = config_input, |
|
}, |
|
}; |
|
|
|
const AVFilter ff_af_deesser = { |
|
.name = "deesser", |
|
.description = NULL_IF_CONFIG_SMALL("Apply de-essing to the audio."), |
|
.priv_size = sizeof(DeesserContext), |
|
.priv_class = &deesser_class, |
|
.uninit = uninit, |
|
FILTER_INPUTS(inputs), |
|
FILTER_OUTPUTS(ff_audio_default_filterpad), |
|
FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_DBLP), |
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
|
};
|
|
|