FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/af_agate.c	Lines:	69	174	39.7 %
Date:	2021-04-14 23:45:22	Branches:	28	112	25.0 %


/*
 * Copyright (C) 2001-2010 Krzysztof Foltman, Markus Schmidt, Thor Harald Johansen, Damien Zammit
 *
 * 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
 */

/**
 * @file
 * Audio (Sidechain) Gate filter
 */

#include "libavutil/audio_fifo.h"
#include "libavutil/avassert.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
#include "filters.h"
#include "formats.h"
#include "hermite.h"

typedef struct AudioGateContext {
    const AVClass *class;

    double level_in;
    double level_sc;
    double attack;
    double release;
    double threshold;
    double ratio;
    double knee;
    double makeup;
    double range;
    int link;
    int detection;
    int mode;

    double thres;
    double knee_start;
    double knee_stop;
    double lin_knee_start;
    double lin_knee_stop;
    double lin_slope;
    double attack_coeff;
    double release_coeff;

    AVAudioFifo *fifo[2];
    int64_t pts;
} AudioGateContext;

#define OFFSET(x) offsetof(AudioGateContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

static const AVOption options[] = {
    { "level_in",  "set input level",        OFFSET(level_in),  AV_OPT_TYPE_DOUBLE, {.dbl=1},           0.015625,   64, A },
    { "mode",      "set mode",               OFFSET(mode),      AV_OPT_TYPE_INT,    {.i64=0},           0, 1, A, "mode" },
    {   "downward",0,                        0,                 AV_OPT_TYPE_CONST,  {.i64=0},           0, 0, A, "mode" },
    {   "upward",  0,                        0,                 AV_OPT_TYPE_CONST,  {.i64=1},           0, 0, A, "mode" },
    { "range",     "set max gain reduction", OFFSET(range),     AV_OPT_TYPE_DOUBLE, {.dbl=0.06125},     0, 1, A },
    { "threshold", "set threshold",          OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0.125},       0, 1, A },
    { "ratio",     "set ratio",              OFFSET(ratio),     AV_OPT_TYPE_DOUBLE, {.dbl=2},           1,  9000, A },
    { "attack",    "set attack",             OFFSET(attack),    AV_OPT_TYPE_DOUBLE, {.dbl=20},          0.01, 9000, A },
    { "release",   "set release",            OFFSET(release),   AV_OPT_TYPE_DOUBLE, {.dbl=250},         0.01, 9000, A },
    { "makeup",    "set makeup gain",        OFFSET(makeup),    AV_OPT_TYPE_DOUBLE, {.dbl=1},           1,   64, A },
    { "knee",      "set knee",               OFFSET(knee),      AV_OPT_TYPE_DOUBLE, {.dbl=2.828427125}, 1,    8, A },
    { "detection", "set detection",          OFFSET(detection), AV_OPT_TYPE_INT,    {.i64=1},           0,    1, A, "detection" },
    {   "peak",    0,                        0,                 AV_OPT_TYPE_CONST,  {.i64=0},           0,    0, A, "detection" },
    {   "rms",     0,                        0,                 AV_OPT_TYPE_CONST,  {.i64=1},           0,    0, A, "detection" },
    { "link",      "set link",               OFFSET(link),      AV_OPT_TYPE_INT,    {.i64=0},           0,    1, A, "link" },
    {   "average", 0,                        0,                 AV_OPT_TYPE_CONST,  {.i64=0},           0,    0, A, "link" },
    {   "maximum", 0,                        0,                 AV_OPT_TYPE_CONST,  {.i64=1},           0,    0, A, "link" },
    { "level_sc",  "set sidechain gain",     OFFSET(level_sc),  AV_OPT_TYPE_DOUBLE, {.dbl=1},           0.015625,   64, A },
    { NULL }
};

static int agate_config_input(AVFilterLink *inlink)
{
    AVFilterContext *ctx = inlink->dst;
    AudioGateContext *s = ctx->priv;
    double lin_threshold = s->threshold;
    double lin_knee_sqrt = sqrt(s->knee);

    if (s->detection)
        lin_threshold *= lin_threshold;

    s->attack_coeff  = FFMIN(1., 1. / (s->attack * inlink->sample_rate / 4000.));
    s->release_coeff = FFMIN(1., 1. / (s->release * inlink->sample_rate / 4000.));
    s->lin_knee_stop = lin_threshold * lin_knee_sqrt;
    s->lin_knee_start = lin_threshold / lin_knee_sqrt;
    s->thres = log(lin_threshold);
    s->knee_start = log(s->lin_knee_start);
    s->knee_stop = log(s->lin_knee_stop);

    return 0;
}

// A fake infinity value (because real infinity may break some hosts)
#define FAKE_INFINITY (65536.0 * 65536.0)

// Check for infinity (with appropriate-ish tolerance)
#define IS_FAKE_INFINITY(value) (fabs(value-FAKE_INFINITY) < 1.0)

static double output_gain(double lin_slope, double ratio, double thres,
                          double knee, double knee_start, double knee_stop,
                          double range, int mode)
{
    double slope = log(lin_slope);
    double tratio = ratio;
    double gain = 0.;
    double delta = 0.;

    if (IS_FAKE_INFINITY(ratio))
        tratio = 1000.;
    gain = (slope - thres) * tratio + thres;
    delta = tratio;

    if (mode) {
        if (knee > 1. && slope < knee_stop)
            gain = hermite_interpolation(slope, knee_stop, knee_start, ((knee_stop - thres) * tratio  + thres), knee_start, delta, 1.);
    } else {
        if (knee > 1. && slope > knee_start)
            gain = hermite_interpolation(slope, knee_start, knee_stop, ((knee_start - thres) * tratio  + thres), knee_stop, delta, 1.);
    }
    return FFMAX(range, exp(gain - slope));
}

static void gate(AudioGateContext *s,
                 const double *src, double *dst, const double *scsrc,
                 int nb_samples, double level_in, double level_sc,
                 AVFilterLink *inlink, AVFilterLink *sclink)
{
    const double makeup = s->makeup;
    const double attack_coeff = s->attack_coeff;
    const double release_coeff = s->release_coeff;
    int n, c;

    for (n = 0; n < nb_samples; n++, src += inlink->channels, dst += inlink->channels, scsrc += sclink->channels) {
        double abs_sample = fabs(scsrc[0] * level_sc), gain = 1.0;
        int detected;

        if (s->link == 1) {
            for (c = 1; c < sclink->channels; c++)
                abs_sample = FFMAX(fabs(scsrc[c] * level_sc), abs_sample);
        } else {
            for (c = 1; c < sclink->channels; c++)
                abs_sample += fabs(scsrc[c] * level_sc);

            abs_sample /= sclink->channels;
        }

        if (s->detection)
            abs_sample *= abs_sample;

        s->lin_slope += (abs_sample - s->lin_slope) * (abs_sample > s->lin_slope ? attack_coeff : release_coeff);

        if (s->mode)
            detected = s->lin_slope > s->lin_knee_start;
        else
            detected = s->lin_slope < s->lin_knee_stop;

        if (s->lin_slope > 0.0 && detected)
            gain = output_gain(s->lin_slope, s->ratio, s->thres,
                               s->knee, s->knee_start, s->knee_stop,
                               s->range, s->mode);

        for (c = 0; c < inlink->channels; c++)
            dst[c] = src[c] * level_in * gain * makeup;
    }
}

#if CONFIG_AGATE_FILTER

#define agate_options options
AVFILTER_DEFINE_CLASS(agate);

static int query_formats(AVFilterContext *ctx)
{
    AVFilterFormats *formats = NULL;
    AVFilterChannelLayouts *layouts;
    int ret;

    if ((ret = ff_add_format(&formats, AV_SAMPLE_FMT_DBL)) < 0)
        return ret;
    ret = ff_set_common_formats(ctx, formats);
    if (ret < 0)
        return ret;

    layouts = ff_all_channel_counts();
    if (!layouts)
        return AVERROR(ENOMEM);
    ret = ff_set_common_channel_layouts(ctx, layouts);
    if (ret < 0)
        return ret;

    formats = ff_all_samplerates();
    if (!formats)
        return AVERROR(ENOMEM);

    return ff_set_common_samplerates(ctx, formats);
}

static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
    const double *src = (const double *)in->data[0];
    AVFilterContext *ctx = inlink->dst;
    AVFilterLink *outlink = ctx->outputs[0];
    AudioGateContext *s = ctx->priv;
    AVFrame *out;
    double *dst;

    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);
    }
    dst = (double *)out->data[0];

    gate(s, src, dst, src, in->nb_samples,
         s->level_in, s->level_in, inlink, inlink);

    if (out != in)
        av_frame_free(&in);
    return ff_filter_frame(outlink, out);
}

static const AVFilterPad inputs[] = {
    {
        .name         = "default",
        .type         = AVMEDIA_TYPE_AUDIO,
        .filter_frame = filter_frame,
        .config_props = agate_config_input,
    },
    { NULL }
};

static const AVFilterPad outputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_AUDIO,
    },
    { NULL }
};

AVFilter ff_af_agate = {
    .name           = "agate",
    .description    = NULL_IF_CONFIG_SMALL("Audio gate."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(AudioGateContext),
    .priv_class     = &agate_class,
    .inputs         = inputs,
    .outputs        = outputs,
    .process_command = ff_filter_process_command,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};

#endif /* CONFIG_AGATE_FILTER */

#if CONFIG_SIDECHAINGATE_FILTER

#define sidechaingate_options options
AVFILTER_DEFINE_CLASS(sidechaingate);

static int activate(AVFilterContext *ctx)
{
    AudioGateContext *s = ctx->priv;
    AVFrame *out = NULL, *in[2] = { NULL };
    int ret, i, nb_samples;
    double *dst;

    FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
    if ((ret = ff_inlink_consume_frame(ctx->inputs[0], &in[0])) > 0) {
        av_audio_fifo_write(s->fifo[0], (void **)in[0]->extended_data,
                            in[0]->nb_samples);
        av_frame_free(&in[0]);
    }
    if (ret < 0)
        return ret;
    if ((ret = ff_inlink_consume_frame(ctx->inputs[1], &in[1])) > 0) {
        av_audio_fifo_write(s->fifo[1], (void **)in[1]->extended_data,
                            in[1]->nb_samples);
        av_frame_free(&in[1]);
    }
    if (ret < 0)
        return ret;

    nb_samples = FFMIN(av_audio_fifo_size(s->fifo[0]), av_audio_fifo_size(s->fifo[1]));
    if (nb_samples) {
        out = ff_get_audio_buffer(ctx->outputs[0], nb_samples);
        if (!out)
            return AVERROR(ENOMEM);
        for (i = 0; i < 2; i++) {
            in[i] = ff_get_audio_buffer(ctx->inputs[i], nb_samples);
            if (!in[i]) {
                av_frame_free(&in[0]);
                av_frame_free(&in[1]);
                av_frame_free(&out);
                return AVERROR(ENOMEM);
            }
            av_audio_fifo_read(s->fifo[i], (void **)in[i]->data, nb_samples);
        }

        dst = (double *)out->data[0];
        out->pts = s->pts;
        s->pts += av_rescale_q(nb_samples, (AVRational){1, ctx->outputs[0]->sample_rate}, ctx->outputs[0]->time_base);

        gate(s, (double *)in[0]->data[0], dst,
             (double *)in[1]->data[0], nb_samples,
             s->level_in, s->level_sc,
             ctx->inputs[0], ctx->inputs[1]);

        av_frame_free(&in[0]);
        av_frame_free(&in[1]);

        ret = ff_filter_frame(ctx->outputs[0], out);
        if (ret < 0)
            return ret;
    }
    FF_FILTER_FORWARD_STATUS(ctx->inputs[0], ctx->outputs[0]);
    FF_FILTER_FORWARD_STATUS(ctx->inputs[1], ctx->outputs[0]);
    if (ff_outlink_frame_wanted(ctx->outputs[0])) {
        if (!av_audio_fifo_size(s->fifo[0]))
            ff_inlink_request_frame(ctx->inputs[0]);
        if (!av_audio_fifo_size(s->fifo[1]))
            ff_inlink_request_frame(ctx->inputs[1]);
    }
    return 0;
}

static int scquery_formats(AVFilterContext *ctx)
{
    AVFilterFormats *formats;
    AVFilterChannelLayouts *layouts = NULL;
    static const enum AVSampleFormat sample_fmts[] = {
        AV_SAMPLE_FMT_DBL,
        AV_SAMPLE_FMT_NONE
    };
    int ret, i;

    if (!ctx->inputs[0]->incfg.channel_layouts ||
        !ctx->inputs[0]->incfg.channel_layouts->nb_channel_layouts) {
        av_log(ctx, AV_LOG_WARNING,
               "No channel layout for input 1\n");
            return AVERROR(EAGAIN);
    }

    if ((ret = ff_add_channel_layout(&layouts, ctx->inputs[0]->incfg.channel_layouts->channel_layouts[0])) < 0 ||
        (ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->incfg.channel_layouts)) < 0)
        return ret;

    for (i = 0; i < 2; i++) {
        layouts = ff_all_channel_counts();
        if ((ret = ff_channel_layouts_ref(layouts, &ctx->inputs[i]->outcfg.channel_layouts)) < 0)
            return ret;
    }

    formats = ff_make_format_list(sample_fmts);
    if ((ret = ff_set_common_formats(ctx, formats)) < 0)
        return ret;

    formats = ff_all_samplerates();
    return ff_set_common_samplerates(ctx, formats);
}

static int scconfig_output(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    AudioGateContext *s = ctx->priv;

    if (ctx->inputs[0]->sample_rate != ctx->inputs[1]->sample_rate) {
        av_log(ctx, AV_LOG_ERROR,
               "Inputs must have the same sample rate "
               "%d for in0 vs %d for in1\n",
               ctx->inputs[0]->sample_rate, ctx->inputs[1]->sample_rate);
        return AVERROR(EINVAL);
    }

    outlink->sample_rate = ctx->inputs[0]->sample_rate;
    outlink->time_base   = ctx->inputs[0]->time_base;
    outlink->channel_layout = ctx->inputs[0]->channel_layout;
    outlink->channels = ctx->inputs[0]->channels;

    s->fifo[0] = av_audio_fifo_alloc(ctx->inputs[0]->format, ctx->inputs[0]->channels, 1024);
    s->fifo[1] = av_audio_fifo_alloc(ctx->inputs[1]->format, ctx->inputs[1]->channels, 1024);
    if (!s->fifo[0] || !s->fifo[1])
        return AVERROR(ENOMEM);


    agate_config_input(ctx->inputs[0]);

    return 0;
}

static av_cold void uninit(AVFilterContext *ctx)
{
    AudioGateContext *s = ctx->priv;

    av_audio_fifo_free(s->fifo[0]);
    av_audio_fifo_free(s->fifo[1]);
}

static const AVFilterPad sidechaingate_inputs[] = {
    {
        .name           = "main",
        .type           = AVMEDIA_TYPE_AUDIO,
    },{
        .name           = "sidechain",
        .type           = AVMEDIA_TYPE_AUDIO,
    },
    { NULL }
};

static const AVFilterPad sidechaingate_outputs[] = {
    {
        .name          = "default",
        .type          = AVMEDIA_TYPE_AUDIO,
        .config_props  = scconfig_output,
    },
    { NULL }
};

AVFilter ff_af_sidechaingate = {
    .name           = "sidechaingate",
    .description    = NULL_IF_CONFIG_SMALL("Audio sidechain gate."),
    .priv_size      = sizeof(AudioGateContext),
    .priv_class     = &sidechaingate_class,
    .query_formats  = scquery_formats,
    .activate       = activate,
    .uninit         = uninit,
    .inputs         = sidechaingate_inputs,
    .outputs        = sidechaingate_outputs,
    .process_command = ff_filter_process_command,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};
#endif  /* CONFIG_SIDECHAINGATE_FILTER */


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (C) 2001-2010 Krzysztof Foltman, Markus Schmidt, Thor Harald Johansen, Damien Zammit
3			*
4			* This file is part of FFmpeg.
5			*
6			* FFmpeg is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10			*
11			* FFmpeg is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15			*
16			* You should have received a copy of the GNU Lesser General Public
17			* License along with FFmpeg; if not, write to the Free Software
18			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19			*/
20
21			/**
22			* @file
23			* Audio (Sidechain) Gate filter
24			*/
25
26			#include "libavutil/audio_fifo.h"
27			#include "libavutil/avassert.h"
28			#include "libavutil/channel_layout.h"
29			#include "libavutil/opt.h"
30			#include "avfilter.h"
31			#include "audio.h"
32			#include "filters.h"
33			#include "formats.h"
34			#include "hermite.h"
35
36			typedef struct AudioGateContext {
37			const AVClass *class;
38
39			double level_in;
40			double level_sc;
41			double attack;
42			double release;
43			double threshold;
44			double ratio;
45			double knee;
46			double makeup;
47			double range;
48			int link;
49			int detection;
50			int mode;
51
52			double thres;
53			double knee_start;
54			double knee_stop;
55			double lin_knee_start;
56			double lin_knee_stop;
57			double lin_slope;
58			double attack_coeff;
59			double release_coeff;
60
61			AVAudioFifo *fifo[2];
62			int64_t pts;
63			} AudioGateContext;
64
65			#define OFFSET(x) offsetof(AudioGateContext, x)
66			#define A AV_OPT_FLAG_AUDIO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_RUNTIME_PARAM
67
68			static const AVOption options[] = {
69			{ "level_in", "set input level", OFFSET(level_in), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
70			{ "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, A, "mode" },
71			{ "downward",0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "mode" },
72			{ "upward", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "mode" },
73			{ "range", "set max gain reduction", OFFSET(range), AV_OPT_TYPE_DOUBLE, {.dbl=0.06125}, 0, 1, A },
74			{ "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0.125}, 0, 1, A },
75			{ "ratio", "set ratio", OFFSET(ratio), AV_OPT_TYPE_DOUBLE, {.dbl=2}, 1, 9000, A },
76			{ "attack", "set attack", OFFSET(attack), AV_OPT_TYPE_DOUBLE, {.dbl=20}, 0.01, 9000, A },
77			{ "release", "set release", OFFSET(release), AV_OPT_TYPE_DOUBLE, {.dbl=250}, 0.01, 9000, A },
78			{ "makeup", "set makeup gain", OFFSET(makeup), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 64, A },
79			{ "knee", "set knee", OFFSET(knee), AV_OPT_TYPE_DOUBLE, {.dbl=2.828427125}, 1, 8, A },
80			{ "detection", "set detection", OFFSET(detection), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, A, "detection" },
81			{ "peak", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "detection" },
82			{ "rms", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "detection" },
83			{ "link", "set link", OFFSET(link), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, A, "link" },
84			{ "average", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "link" },
85			{ "maximum", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "link" },
86			{ "level_sc", "set sidechain gain", OFFSET(level_sc), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
87			{ NULL }
88			};
89
90		1	static int agate_config_input(AVFilterLink *inlink)
91			{
92		1	AVFilterContext *ctx = inlink->dst;
93		1	AudioGateContext *s = ctx->priv;
94		1	double lin_threshold = s->threshold;
95		1	double lin_knee_sqrt = sqrt(s->knee);
96
97	✓✗	1	if (s->detection)
98		1	lin_threshold *= lin_threshold;
99
100	✓✗	1	s->attack_coeff = FFMIN(1., 1. / (s->attack * inlink->sample_rate / 4000.));
101	✓✗	1	s->release_coeff = FFMIN(1., 1. / (s->release * inlink->sample_rate / 4000.));
102		1	s->lin_knee_stop = lin_threshold * lin_knee_sqrt;
103		1	s->lin_knee_start = lin_threshold / lin_knee_sqrt;
104		1	s->thres = log(lin_threshold);
105		1	s->knee_start = log(s->lin_knee_start);
106		1	s->knee_stop = log(s->lin_knee_stop);
107
108		1	return 0;
109			}
110
111			// A fake infinity value (because real infinity may break some hosts)
112			#define FAKE_INFINITY (65536.0 * 65536.0)
113
114			// Check for infinity (with appropriate-ish tolerance)
115			#define IS_FAKE_INFINITY(value) (fabs(value-FAKE_INFINITY) < 1.0)
116
117		1	static double output_gain(double lin_slope, double ratio, double thres,
118			double knee, double knee_start, double knee_stop,
119			double range, int mode)
120			{
121		1	double slope = log(lin_slope);
122		1	double tratio = ratio;
123		1	double gain = 0.;
124		1	double delta = 0.;
125
126	✗✓	1	if (IS_FAKE_INFINITY(ratio))
127			tratio = 1000.;
128		1	gain = (slope - thres) * tratio + thres;
129		1	delta = tratio;
130
131	✗✓	1	if (mode) {
132			if (knee > 1. && slope < knee_stop)
133			gain = hermite_interpolation(slope, knee_stop, knee_start, ((knee_stop - thres) * tratio + thres), knee_start, delta, 1.);
134			} else {
135	✗✓✗✗	1	if (knee > 1. && slope > knee_start)
136			gain = hermite_interpolation(slope, knee_start, knee_stop, ((knee_start - thres) * tratio + thres), knee_stop, delta, 1.);
137			}
138	✗✓	1	return FFMAX(range, exp(gain - slope));
139			}
140
141		259	static void gate(AudioGateContext *s,
142			const double src, double dst, const double *scsrc,
143			int nb_samples, double level_in, double level_sc,
144			AVFilterLink inlink, AVFilterLink sclink)
145			{
146		259	const double makeup = s->makeup;
147		259	const double attack_coeff = s->attack_coeff;
148		259	const double release_coeff = s->release_coeff;
149			int n, c;
150
151	✓✓	264859	for (n = 0; n < nb_samples; n++, src += inlink->channels, dst += inlink->channels, scsrc += sclink->channels) {
152		264600	double abs_sample = fabs(scsrc[0] * level_sc), gain = 1.0;
153			int detected;
154
155	✗✓	264600	if (s->link == 1) {
156			for (c = 1; c < sclink->channels; c++)
157			abs_sample = FFMAX(fabs(scsrc[c] * level_sc), abs_sample);
158			} else {
159	✓✓	529200	for (c = 1; c < sclink->channels; c++)
160		264600	abs_sample += fabs(scsrc[c] * level_sc);
161
162		264600	abs_sample /= sclink->channels;
163			}
164
165	✓✗	264600	if (s->detection)
166		264600	abs_sample *= abs_sample;
167
168	✓✓	264600	s->lin_slope += (abs_sample - s->lin_slope) * (abs_sample > s->lin_slope ? attack_coeff : release_coeff);
169
170	✗✓	264600	if (s->mode)
171			detected = s->lin_slope > s->lin_knee_start;
172			else
173		264600	detected = s->lin_slope < s->lin_knee_stop;
174
175	✓✗✓✓	264600	if (s->lin_slope > 0.0 && detected)
176		1	gain = output_gain(s->lin_slope, s->ratio, s->thres,
177			s->knee, s->knee_start, s->knee_stop,
178			s->range, s->mode);
179
180	✓✓	793800	for (c = 0; c < inlink->channels; c++)
181		529200	dst[c] = src[c] * level_in * gain * makeup;
182			}
183		259	}
184
185			#if CONFIG_AGATE_FILTER
186
187			#define agate_options options
188			AVFILTER_DEFINE_CLASS(agate);
189
190		1	static int query_formats(AVFilterContext *ctx)
191			{
192		1	AVFilterFormats *formats = NULL;
193			AVFilterChannelLayouts *layouts;
194			int ret;
195
196	✗✓	1	if ((ret = ff_add_format(&formats, AV_SAMPLE_FMT_DBL)) < 0)
197			return ret;
198		1	ret = ff_set_common_formats(ctx, formats);
199	✗✓	1	if (ret < 0)
200			return ret;
201
202		1	layouts = ff_all_channel_counts();
203	✗✓	1	if (!layouts)
204			return AVERROR(ENOMEM);
205		1	ret = ff_set_common_channel_layouts(ctx, layouts);
206	✗✓	1	if (ret < 0)
207			return ret;
208
209		1	formats = ff_all_samplerates();
210	✗✓	1	if (!formats)
211			return AVERROR(ENOMEM);
212
213		1	return ff_set_common_samplerates(ctx, formats);
214			}
215
216		259	static int filter_frame(AVFilterLink inlink, AVFrame in)
217			{
218		259	const double src = (const double )in->data[0];
219		259	AVFilterContext *ctx = inlink->dst;
220		259	AVFilterLink *outlink = ctx->outputs[0];
221		259	AudioGateContext *s = ctx->priv;
222			AVFrame *out;
223			double *dst;
224
225	✓✗	259	if (av_frame_is_writable(in)) {
226		259	out = in;
227			} else {
228			out = ff_get_audio_buffer(outlink, in->nb_samples);
229			if (!out) {
230			av_frame_free(&in);
231			return AVERROR(ENOMEM);
232			}
233			av_frame_copy_props(out, in);
234			}
235		259	dst = (double *)out->data[0];
236
237		259	gate(s, src, dst, src, in->nb_samples,
238			s->level_in, s->level_in, inlink, inlink);
239
240	✗✓	259	if (out != in)
241			av_frame_free(&in);
242		259	return ff_filter_frame(outlink, out);
243			}
244
245			static const AVFilterPad inputs[] = {
246			{
247			.name = "default",
248			.type = AVMEDIA_TYPE_AUDIO,
249			.filter_frame = filter_frame,
250			.config_props = agate_config_input,
251			},
252			{ NULL }
253			};
254
255			static const AVFilterPad outputs[] = {
256			{
257			.name = "default",
258			.type = AVMEDIA_TYPE_AUDIO,
259			},
260			{ NULL }
261			};
262
263			AVFilter ff_af_agate = {
264			.name = "agate",
265			.description = NULL_IF_CONFIG_SMALL("Audio gate."),
266			.query_formats = query_formats,
267			.priv_size = sizeof(AudioGateContext),
268			.priv_class = &agate_class,
269			.inputs = inputs,
270			.outputs = outputs,
271			.process_command = ff_filter_process_command,
272			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
273			};
274
275			#endif /* CONFIG_AGATE_FILTER */
276
277			#if CONFIG_SIDECHAINGATE_FILTER
278
279			#define sidechaingate_options options
280			AVFILTER_DEFINE_CLASS(sidechaingate);
281
282			static int activate(AVFilterContext *ctx)
283			{
284			AudioGateContext *s = ctx->priv;
285			AVFrame out = NULL, in[2] = { NULL };
286			int ret, i, nb_samples;
287			double *dst;
288
289			FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
290			if ((ret = ff_inlink_consume_frame(ctx->inputs[0], &in[0])) > 0) {
291			av_audio_fifo_write(s->fifo[0], (void **)in[0]->extended_data,
292			in[0]->nb_samples);
293			av_frame_free(&in[0]);
294			}
295			if (ret < 0)
296			return ret;
297			if ((ret = ff_inlink_consume_frame(ctx->inputs[1], &in[1])) > 0) {
298			av_audio_fifo_write(s->fifo[1], (void **)in[1]->extended_data,
299			in[1]->nb_samples);
300			av_frame_free(&in[1]);
301			}
302			if (ret < 0)
303			return ret;
304
305			nb_samples = FFMIN(av_audio_fifo_size(s->fifo[0]), av_audio_fifo_size(s->fifo[1]));
306			if (nb_samples) {
307			out = ff_get_audio_buffer(ctx->outputs[0], nb_samples);
308			if (!out)
309			return AVERROR(ENOMEM);
310			for (i = 0; i < 2; i++) {
311			in[i] = ff_get_audio_buffer(ctx->inputs[i], nb_samples);
312			if (!in[i]) {
313			av_frame_free(&in[0]);
314			av_frame_free(&in[1]);
315			av_frame_free(&out);
316			return AVERROR(ENOMEM);
317			}
318			av_audio_fifo_read(s->fifo[i], (void **)in[i]->data, nb_samples);
319			}
320
321			dst = (double *)out->data[0];
322			out->pts = s->pts;
323			s->pts += av_rescale_q(nb_samples, (AVRational){1, ctx->outputs[0]->sample_rate}, ctx->outputs[0]->time_base);
324
325			gate(s, (double *)in[0]->data[0], dst,
326			(double *)in[1]->data[0], nb_samples,
327			s->level_in, s->level_sc,
328			ctx->inputs[0], ctx->inputs[1]);
329
330			av_frame_free(&in[0]);
331			av_frame_free(&in[1]);
332
333			ret = ff_filter_frame(ctx->outputs[0], out);
334			if (ret < 0)
335			return ret;
336			}
337			FF_FILTER_FORWARD_STATUS(ctx->inputs[0], ctx->outputs[0]);
338			FF_FILTER_FORWARD_STATUS(ctx->inputs[1], ctx->outputs[0]);
339			if (ff_outlink_frame_wanted(ctx->outputs[0])) {
340			if (!av_audio_fifo_size(s->fifo[0]))
341			ff_inlink_request_frame(ctx->inputs[0]);
342			if (!av_audio_fifo_size(s->fifo[1]))
343			ff_inlink_request_frame(ctx->inputs[1]);
344			}
345			return 0;
346			}
347
348			static int scquery_formats(AVFilterContext *ctx)
349			{
350			AVFilterFormats *formats;
351			AVFilterChannelLayouts *layouts = NULL;
352			static const enum AVSampleFormat sample_fmts[] = {
353			AV_SAMPLE_FMT_DBL,
354			AV_SAMPLE_FMT_NONE
355			};
356			int ret, i;
357
358			if (!ctx->inputs[0]->incfg.channel_layouts \|\|
359			!ctx->inputs[0]->incfg.channel_layouts->nb_channel_layouts) {
360			av_log(ctx, AV_LOG_WARNING,
361			"No channel layout for input 1\n");
362			return AVERROR(EAGAIN);
363			}
364
365			if ((ret = ff_add_channel_layout(&layouts, ctx->inputs[0]->incfg.channel_layouts->channel_layouts[0])) < 0 \|\|
366			(ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->incfg.channel_layouts)) < 0)
367			return ret;
368
369			for (i = 0; i < 2; i++) {
370			layouts = ff_all_channel_counts();
371			if ((ret = ff_channel_layouts_ref(layouts, &ctx->inputs[i]->outcfg.channel_layouts)) < 0)
372			return ret;
373			}
374
375			formats = ff_make_format_list(sample_fmts);
376			if ((ret = ff_set_common_formats(ctx, formats)) < 0)
377			return ret;
378
379			formats = ff_all_samplerates();
380			return ff_set_common_samplerates(ctx, formats);
381			}
382
383			static int scconfig_output(AVFilterLink *outlink)
384			{
385			AVFilterContext *ctx = outlink->src;
386			AudioGateContext *s = ctx->priv;
387
388			if (ctx->inputs[0]->sample_rate != ctx->inputs[1]->sample_rate) {
389			av_log(ctx, AV_LOG_ERROR,
390			"Inputs must have the same sample rate "
391			"%d for in0 vs %d for in1\n",
392			ctx->inputs[0]->sample_rate, ctx->inputs[1]->sample_rate);
393			return AVERROR(EINVAL);
394			}
395
396			outlink->sample_rate = ctx->inputs[0]->sample_rate;
397			outlink->time_base = ctx->inputs[0]->time_base;
398			outlink->channel_layout = ctx->inputs[0]->channel_layout;
399			outlink->channels = ctx->inputs[0]->channels;
400
401			s->fifo[0] = av_audio_fifo_alloc(ctx->inputs[0]->format, ctx->inputs[0]->channels, 1024);
402			s->fifo[1] = av_audio_fifo_alloc(ctx->inputs[1]->format, ctx->inputs[1]->channels, 1024);
403			if (!s->fifo[0] \|\| !s->fifo[1])
404			return AVERROR(ENOMEM);
405
406
407			agate_config_input(ctx->inputs[0]);
408
409			return 0;
410			}
411
412			static av_cold void uninit(AVFilterContext *ctx)
413			{
414			AudioGateContext *s = ctx->priv;
415
416			av_audio_fifo_free(s->fifo[0]);
417			av_audio_fifo_free(s->fifo[1]);
418			}
419
420			static const AVFilterPad sidechaingate_inputs[] = {
421			{
422			.name = "main",
423			.type = AVMEDIA_TYPE_AUDIO,
424			},{
425			.name = "sidechain",
426			.type = AVMEDIA_TYPE_AUDIO,
427			},
428			{ NULL }
429			};
430
431			static const AVFilterPad sidechaingate_outputs[] = {
432			{
433			.name = "default",
434			.type = AVMEDIA_TYPE_AUDIO,
435			.config_props = scconfig_output,
436			},
437			{ NULL }
438			};
439
440			AVFilter ff_af_sidechaingate = {
441			.name = "sidechaingate",
442			.description = NULL_IF_CONFIG_SMALL("Audio sidechain gate."),
443			.priv_size = sizeof(AudioGateContext),
444			.priv_class = &sidechaingate_class,
445			.query_formats = scquery_formats,
446			.activate = activate,
447			.uninit = uninit,
448			.inputs = sidechaingate_inputs,
449			.outputs = sidechaingate_outputs,
450			.process_command = ff_filter_process_command,
451			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
452			};
453			#endif /* CONFIG_SIDECHAINGATE_FILTER */