FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/af_stereotools.c	Lines:	99	197	50.3 %
Date:	2021-04-14 23:45:22	Branches:	26	118	22.0 %


/*
 * 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;
    int bmode_in;
    int bmode_out;
    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|AV_OPT_FLAG_RUNTIME_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,         10, 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" },
    {     "ms>ll",   0,                  0,                   AV_OPT_TYPE_CONST,  {.i64=7},   0,          0, A, "mode" },
    {     "ms>rr",   0,                  0,                   AV_OPT_TYPE_CONST,  {.i64=8},   0,          0, A, "mode" },
    {     "ms>rl",   0,                  0,                   AV_OPT_TYPE_CONST,  {.i64=9},   0,          0, A, "mode" },
    {     "lr>l-r",  0,                  0,                   AV_OPT_TYPE_CONST,  {.i64=10},  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 },
    { "bmode_in",    "set balance in mode", OFFSET(bmode_in), AV_OPT_TYPE_INT,    {.i64=0},   0,          2, A, "bmode" },
    {     "balance",   0,                0,                   AV_OPT_TYPE_CONST,  {.i64=0},   0,          0, A, "bmode" },
    {     "amplitude", 0,                0,                   AV_OPT_TYPE_CONST,  {.i64=1},   0,          0, A, "bmode" },
    {     "power",     0,                0,                   AV_OPT_TYPE_CONST,  {.i64=2},   0,          0, A, "bmode" },
    { "bmode_out", "set balance out mode", OFFSET(bmode_out), AV_OPT_TYPE_INT,    {.i64=0},   0,          2, A, "bmode" },
    { NULL }
};

AVFILTER_DEFINE_CLASS(stereotools);

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

    if ((ret = ff_add_format                 (&formats, AV_SAMPLE_FMT_DBL  )) < 0 ||
        (ret = ff_set_common_formats         (ctx     , formats            )) < 0 ||
        (ret = ff_add_channel_layout         (&layout , AV_CH_LAYOUT_STEREO)) < 0 ||
        (ret = ff_set_common_channel_layouts (ctx     , layout             )) < 0)
        return ret;

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

static int config_input(AVFilterLink *inlink)
{
    AVFilterContext *ctx = inlink->dst;
    StereoToolsContext *s = ctx->priv;

    s->length = FFALIGN(inlink->sample_rate / 10, 2);
    if (!s->buffer)
        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 = s->mute_l;
    const int mute_r = s->mute_r;
    const int phase_l = s->phase_l;
    const int phase_r = s->phase_r;
    double *buffer = s->buffer;
    AVFrame *out;
    double *dst;
    int nbuf = inlink->sample_rate * (fabs(delay) / 1000.);
    int n;

    nbuf -= nbuf % 2;
    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];

    for (n = 0; n < in->nb_samples; n++, src += 2, dst += 2) {
        double L = src[0], R = src[1], l, r, m, S, gl, gr, gd;

        L *= level_in;
        R *= level_in;

        gl = 1. - FFMAX(0., balance_in);
        gr = 1. + FFMIN(0., balance_in);
        switch (s->bmode_in) {
        case 1:
            gd = gl - gr;
            gl = 1. + gd;
            gr = 1. - gd;
            break;
        case 2:
            if (balance_in < 0.) {
                gr = FFMAX(0.5, gr);
                gl = 1. / gr;
            } else if (balance_in > 0.) {
                gl = FFMAX(0.5, gl);
                gr = 1. / gl;
            }
            break;
        }
        L *= gl;
        R *= gr;

        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) * 0.5;
            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;
        case 7:
            l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal);
            L = l;
            R = l;
            break;
        case 8:
            r = L * mlev * FFMIN(1., mpan)      - R * slev * FFMIN(1., sbal);
            L = r;
            R = r;
            break;
        case 9:
            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 = r;
            R = l;
            break;
        case 10:
            L = (L - R) * 0.5;
            R = L;
            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;

        gl = 1. - FFMAX(0., balance_out);
        gr = 1. + FFMIN(0., balance_out);
        switch (s->bmode_out) {
        case 1:
            gd = gl - gr;
            gl = 1. + gd;
            gr = 1. - gd;
            break;
        case 2:
            if (balance_out < 0.) {
                gr = FFMAX(0.5, gr);
                gl = 1. / gr;
            } else if (balance_out > 0.) {
                gl = FFMAX(0.5, gl);
                gr = 1. / gl;
            }
            break;
        }
        L *= gl;
        R *= gr;


        L *= level_out;
        R *= level_out;

        if (ctx->is_disabled) {
            dst[0] = src[0];
            dst[1] = src[1];
        } else {
            dst[0] = L;
            dst[1] = R;
        }
    }

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

static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
                           char *res, int res_len, int flags)
{
    int ret;

    ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
    if (ret < 0)
        return ret;

    return config_input(ctx->inputs[0]);
}

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,
    .process_command = process_command,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (C) 2001-2010 Krzysztof Foltman, Markus Schmidt, Thor Harald Johansen
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			#include "libavutil/channel_layout.h"
22			#include "libavutil/opt.h"
23			#include "avfilter.h"
24			#include "audio.h"
25			#include "formats.h"
26
27			typedef struct StereoToolsContext {
28			const AVClass *class;
29
30			int softclip;
31			int mute_l;
32			int mute_r;
33			int phase_l;
34			int phase_r;
35			int mode;
36			int bmode_in;
37			int bmode_out;
38			double slev;
39			double sbal;
40			double mlev;
41			double mpan;
42			double phase;
43			double base;
44			double delay;
45			double balance_in;
46			double balance_out;
47			double phase_sin_coef;
48			double phase_cos_coef;
49			double sc_level;
50			double inv_atan_shape;
51			double level_in;
52			double level_out;
53
54			double *buffer;
55			int length;
56			int pos;
57			} StereoToolsContext;
58
59			#define OFFSET(x) offsetof(StereoToolsContext, x)
60			#define A AV_OPT_FLAG_AUDIO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM\|AV_OPT_FLAG_RUNTIME_PARAM
61
62			static const AVOption stereotools_options[] = {
63			{ "level_in", "set level in", OFFSET(level_in), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
64			{ "level_out", "set level out", OFFSET(level_out), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
65			{ "balance_in", "set balance in", OFFSET(balance_in), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
66			{ "balance_out", "set balance out", OFFSET(balance_out), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
67			{ "softclip", "enable softclip", OFFSET(softclip), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
68			{ "mutel", "mute L", OFFSET(mute_l), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
69			{ "muter", "mute R", OFFSET(mute_r), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
70			{ "phasel", "phase L", OFFSET(phase_l), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
71			{ "phaser", "phase R", OFFSET(phase_r), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, A },
72			{ "mode", "set stereo mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 10, A, "mode" },
73			{ "lr>lr", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "mode" },
74			{ "lr>ms", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "mode" },
75			{ "ms>lr", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, "mode" },
76			{ "lr>ll", 0, 0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, A, "mode" },
77			{ "lr>rr", 0, 0, AV_OPT_TYPE_CONST, {.i64=4}, 0, 0, A, "mode" },
78			{ "lr>l+r", 0, 0, AV_OPT_TYPE_CONST, {.i64=5}, 0, 0, A, "mode" },
79			{ "lr>rl", 0, 0, AV_OPT_TYPE_CONST, {.i64=6}, 0, 0, A, "mode" },
80			{ "ms>ll", 0, 0, AV_OPT_TYPE_CONST, {.i64=7}, 0, 0, A, "mode" },
81			{ "ms>rr", 0, 0, AV_OPT_TYPE_CONST, {.i64=8}, 0, 0, A, "mode" },
82			{ "ms>rl", 0, 0, AV_OPT_TYPE_CONST, {.i64=9}, 0, 0, A, "mode" },
83			{ "lr>l-r", 0, 0, AV_OPT_TYPE_CONST, {.i64=10}, 0, 0, A, "mode" },
84			{ "slev", "set side level", OFFSET(slev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
85			{ "sbal", "set side balance", OFFSET(sbal), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
86			{ "mlev", "set middle level", OFFSET(mlev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
87			{ "mpan", "set middle pan", OFFSET(mpan), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
88			{ "base", "set stereo base", OFFSET(base), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
89			{ "delay", "set delay", OFFSET(delay), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -20, 20, A },
90			{ "sclevel", "set S/C level", OFFSET(sc_level), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 100, A },
91			{ "phase", "set stereo phase", OFFSET(phase), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 360, A },
92			{ "bmode_in", "set balance in mode", OFFSET(bmode_in), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, A, "bmode" },
93			{ "balance", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "bmode" },
94			{ "amplitude", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "bmode" },
95			{ "power", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, "bmode" },
96			{ "bmode_out", "set balance out mode", OFFSET(bmode_out), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, A, "bmode" },
97			{ NULL }
98			};
99
100			AVFILTER_DEFINE_CLASS(stereotools);
101
102		1	static int query_formats(AVFilterContext *ctx)
103			{
104		1	AVFilterFormats *formats = NULL;
105		1	AVFilterChannelLayouts *layout = NULL;
106			int ret;
107
108	✓✗✓✗	2	if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBL )) < 0 \|\|
109	✓✗	2	(ret = ff_set_common_formats (ctx , formats )) < 0 \|\|
110	✗✓	2	(ret = ff_add_channel_layout (&layout , AV_CH_LAYOUT_STEREO)) < 0 \|\|
111		1	(ret = ff_set_common_channel_layouts (ctx , layout )) < 0)
112			return ret;
113
114		1	formats = ff_all_samplerates();
115		1	return ff_set_common_samplerates(ctx, formats);
116			}
117
118		1	static int config_input(AVFilterLink *inlink)
119			{
120		1	AVFilterContext *ctx = inlink->dst;
121		1	StereoToolsContext *s = ctx->priv;
122
123		1	s->length = FFALIGN(inlink->sample_rate / 10, 2);
124	✓✗	1	if (!s->buffer)
125		1	s->buffer = av_calloc(s->length, sizeof(*s->buffer));
126	✗✓	1	if (!s->buffer)
127			return AVERROR(ENOMEM);
128
129		1	s->inv_atan_shape = 1.0 / atan(s->sc_level);
130		1	s->phase_cos_coef = cos(s->phase / 180 * M_PI);
131		1	s->phase_sin_coef = sin(s->phase / 180 * M_PI);
132
133		1	return 0;
134			}
135
136		20	static int filter_frame(AVFilterLink inlink, AVFrame in)
137			{
138		20	AVFilterContext *ctx = inlink->dst;
139		20	AVFilterLink *outlink = ctx->outputs[0];
140		20	StereoToolsContext *s = ctx->priv;
141		20	const double src = (const double )in->data[0];
142	✗✓	20	const double sb = s->base < 0 ? s->base * 0.5 : s->base;
143		20	const double sbal = 1 + s->sbal;
144		20	const double mpan = 1 + s->mpan;
145		20	const double slev = s->slev;
146		20	const double mlev = s->mlev;
147		20	const double balance_in = s->balance_in;
148		20	const double balance_out = s->balance_out;
149		20	const double level_in = s->level_in;
150		20	const double level_out = s->level_out;
151		20	const double sc_level = s->sc_level;
152		20	const double delay = s->delay;
153		20	const int length = s->length;
154		20	const int mute_l = s->mute_l;
155		20	const int mute_r = s->mute_r;
156		20	const int phase_l = s->phase_l;
157		20	const int phase_r = s->phase_r;
158		20	double *buffer = s->buffer;
159			AVFrame *out;
160			double *dst;
161		20	int nbuf = inlink->sample_rate * (fabs(delay) / 1000.);
162			int n;
163
164		20	nbuf -= nbuf % 2;
165	✓✗	20	if (av_frame_is_writable(in)) {
166		20	out = in;
167			} else {
168			out = ff_get_audio_buffer(outlink, in->nb_samples);
169			if (!out) {
170			av_frame_free(&in);
171			return AVERROR(ENOMEM);
172			}
173			av_frame_copy_props(out, in);
174			}
175		20	dst = (double *)out->data[0];
176
177	✓✓	20500	for (n = 0; n < in->nb_samples; n++, src += 2, dst += 2) {
178		20480	double L = src[0], R = src[1], l, r, m, S, gl, gr, gd;
179
180		20480	L *= level_in;
181		20480	R *= level_in;
182
183	✗✓	20480	gl = 1. - FFMAX(0., balance_in);
184	✗✓	20480	gr = 1. + FFMIN(0., balance_in);
185	✗✗✓	20480	switch (s->bmode_in) {
186			case 1:
187			gd = gl - gr;
188			gl = 1. + gd;
189			gr = 1. - gd;
190			break;
191			case 2:
192			if (balance_in < 0.) {
193			gr = FFMAX(0.5, gr);
194			gl = 1. / gr;
195			} else if (balance_in > 0.) {
196			gl = FFMAX(0.5, gl);
197			gr = 1. / gl;
198			}
199			break;
200			}
201		20480	L *= gl;
202		20480	R *= gr;
203
204	✗✓	20480	if (s->softclip) {
205			R = s->inv_atan_shape * atan(R * sc_level);
206			L = s->inv_atan_shape * atan(L * sc_level);
207			}
208
209	✓✗✗✗ ✗✗✗✗ ✗✗✗✗	20480	switch (s->mode) {
210		20480	case 0:
211		20480	m = (L + R) * 0.5;
212		20480	S = (L - R) * 0.5;
213	✗✓✗✓	20480	l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal);
214	✗✓✗✓	20480	r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal);
215		20480	L = l;
216		20480	R = r;
217		20480	break;
218			case 1:
219			l = L * FFMIN(1., 2. - sbal);
220			r = R * FFMIN(1., sbal);
221			L = 0.5 * (l + r) * mlev;
222			R = 0.5 * (l - r) * slev;
223			break;
224			case 2:
225			l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal);
226			r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal);
227			L = l;
228			R = r;
229			break;
230			case 3:
231			R = L;
232			break;
233			case 4:
234			L = R;
235			break;
236			case 5:
237			L = (L + R) * 0.5;
238			R = L;
239			break;
240			case 6:
241			l = L;
242			L = R;
243			R = l;
244			m = (L + R) * 0.5;
245			S = (L - R) * 0.5;
246			l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal);
247			r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal);
248			L = l;
249			R = r;
250			break;
251			case 7:
252			l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal);
253			L = l;
254			R = l;
255			break;
256			case 8:
257			r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal);
258			L = r;
259			R = r;
260			break;
261			case 9:
262			l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal);
263			r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal);
264			L = r;
265			R = l;
266			break;
267			case 10:
268			L = (L - R) * 0.5;
269			R = L;
270			break;
271			}
272
273		20480	L *= 1. - mute_l;
274		20480	R *= 1. - mute_r;
275
276		20480	L = (2. (1. - phase_l)) - 1.;
277		20480	R = (2. (1. - phase_r)) - 1.;
278
279		20480	buffer[s->pos ] = L;
280		20480	buffer[s->pos+1] = R;
281
282	✗✓	20480	if (delay > 0.) {
283			R = buffer[(s->pos - (int)nbuf + 1 + length) % length];
284	✗✓	20480	} else if (delay < 0.) {
285			L = buffer[(s->pos - (int)nbuf + length) % length];
286			}
287
288		20480	l = L + sb * L - sb * R;
289		20480	r = R + sb * R - sb * L;
290
291		20480	L = l;
292		20480	R = r;
293
294		20480	l = L * s->phase_cos_coef - R * s->phase_sin_coef;
295		20480	r = L * s->phase_sin_coef + R * s->phase_cos_coef;
296
297		20480	L = l;
298		20480	R = r;
299
300		20480	s->pos = (s->pos + 2) % s->length;
301
302	✗✓	20480	gl = 1. - FFMAX(0., balance_out);
303	✗✓	20480	gr = 1. + FFMIN(0., balance_out);
304	✗✗✓	20480	switch (s->bmode_out) {
305			case 1:
306			gd = gl - gr;
307			gl = 1. + gd;
308			gr = 1. - gd;
309			break;
310			case 2:
311			if (balance_out < 0.) {
312			gr = FFMAX(0.5, gr);
313			gl = 1. / gr;
314			} else if (balance_out > 0.) {
315			gl = FFMAX(0.5, gl);
316			gr = 1. / gl;
317			}
318			break;
319			}
320		20480	L *= gl;
321		20480	R *= gr;
322
323
324		20480	L *= level_out;
325		20480	R *= level_out;
326
327	✗✓	20480	if (ctx->is_disabled) {
328			dst[0] = src[0];
329			dst[1] = src[1];
330			} else {
331		20480	dst[0] = L;
332		20480	dst[1] = R;
333			}
334			}
335
336	✗✓	20	if (out != in)
337			av_frame_free(&in);
338		20	return ff_filter_frame(outlink, out);
339			}
340
341			static int process_command(AVFilterContext ctx, const char cmd, const char *args,
342			char *res, int res_len, int flags)
343			{
344			int ret;
345
346			ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
347			if (ret < 0)
348			return ret;
349
350			return config_input(ctx->inputs[0]);
351			}
352
353		1	static av_cold void uninit(AVFilterContext *ctx)
354			{
355		1	StereoToolsContext *s = ctx->priv;
356
357		1	av_freep(&s->buffer);
358		1	}
359
360			static const AVFilterPad inputs[] = {
361			{
362			.name = "default",
363			.type = AVMEDIA_TYPE_AUDIO,
364			.filter_frame = filter_frame,
365			.config_props = config_input,
366			},
367			{ NULL }
368			};
369
370			static const AVFilterPad outputs[] = {
371			{
372			.name = "default",
373			.type = AVMEDIA_TYPE_AUDIO,
374			},
375			{ NULL }
376			};
377
378			AVFilter ff_af_stereotools = {
379			.name = "stereotools",
380			.description = NULL_IF_CONFIG_SMALL("Apply various stereo tools."),
381			.query_formats = query_formats,
382			.priv_size = sizeof(StereoToolsContext),
383			.priv_class = &stereotools_class,
384			.uninit = uninit,
385			.inputs = inputs,
386			.outputs = outputs,
387			.process_command = process_command,
388			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
389			};