FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/af_stereotools.c	Lines:	98	181	54.1 %
Date:	2020-09-25 14:59:26	Branches:	26	106	24.5 %


/*
 * 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

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,          8, 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" },
    { "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 = 2 * inlink->sample_rate * 0.05;
    if (s->length <= 1 || s->length & 1) {
        av_log(ctx, AV_LOG_ERROR, "sample rate is too small\n");
        return AVERROR(EINVAL);
    }
    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) / 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;
        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;
        }

        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;

        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,
};


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
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, 8, 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			{ "slev", "set side level", OFFSET(slev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
83			{ "sbal", "set side balance", OFFSET(sbal), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
84			{ "mlev", "set middle level", OFFSET(mlev), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0.015625, 64, A },
85			{ "mpan", "set middle pan", OFFSET(mpan), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
86			{ "base", "set stereo base", OFFSET(base), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -1, 1, A },
87			{ "delay", "set delay", OFFSET(delay), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -20, 20, A },
88			{ "sclevel", "set S/C level", OFFSET(sc_level), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 1, 100, A },
89			{ "phase", "set stereo phase", OFFSET(phase), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 360, A },
90			{ "bmode_in", "set balance in mode", OFFSET(bmode_in), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, A, "bmode" },
91			{ "balance", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, A, "bmode" },
92			{ "amplitude", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, A, "bmode" },
93			{ "power", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, A, "bmode" },
94			{ "bmode_out", "set balance out mode", OFFSET(bmode_out), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, A, "bmode" },
95			{ NULL }
96			};
97
98			AVFILTER_DEFINE_CLASS(stereotools);
99
100		1	static int query_formats(AVFilterContext *ctx)
101			{
102		1	AVFilterFormats *formats = NULL;
103		1	AVFilterChannelLayouts *layout = NULL;
104			int ret;
105
106	✓✗✓✗	2	if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_DBL )) < 0 \|\|
107	✓✗	2	(ret = ff_set_common_formats (ctx , formats )) < 0 \|\|
108	✗✓	2	(ret = ff_add_channel_layout (&layout , AV_CH_LAYOUT_STEREO)) < 0 \|\|
109		1	(ret = ff_set_common_channel_layouts (ctx , layout )) < 0)
110			return ret;
111
112		1	formats = ff_all_samplerates();
113		1	return ff_set_common_samplerates(ctx, formats);
114			}
115
116		1	static int config_input(AVFilterLink *inlink)
117			{
118		1	AVFilterContext *ctx = inlink->dst;
119		1	StereoToolsContext *s = ctx->priv;
120
121		1	s->length = 2 * inlink->sample_rate * 0.05;
122	✓✗✗✓	1	if (s->length <= 1 \|\| s->length & 1) {
123			av_log(ctx, AV_LOG_ERROR, "sample rate is too small\n");
124			return AVERROR(EINVAL);
125			}
126		1	s->buffer = av_calloc(s->length, sizeof(*s->buffer));
127	✗✓	1	if (!s->buffer)
128			return AVERROR(ENOMEM);
129
130		1	s->inv_atan_shape = 1.0 / atan(s->sc_level);
131		1	s->phase_cos_coef = cos(s->phase / 180 * M_PI);
132		1	s->phase_sin_coef = sin(s->phase / 180 * M_PI);
133
134		1	return 0;
135			}
136
137		20	static int filter_frame(AVFilterLink inlink, AVFrame in)
138			{
139		20	AVFilterContext *ctx = inlink->dst;
140		20	AVFilterLink *outlink = ctx->outputs[0];
141		20	StereoToolsContext *s = ctx->priv;
142		20	const double src = (const double )in->data[0];
143	✗✓	20	const double sb = s->base < 0 ? s->base * 0.5 : s->base;
144		20	const double sbal = 1 + s->sbal;
145		20	const double mpan = 1 + s->mpan;
146		20	const double slev = s->slev;
147		20	const double mlev = s->mlev;
148		20	const double balance_in = s->balance_in;
149		20	const double balance_out = s->balance_out;
150		20	const double level_in = s->level_in;
151		20	const double level_out = s->level_out;
152		20	const double sc_level = s->sc_level;
153		20	const double delay = s->delay;
154		20	const int length = s->length;
155		20	const int mute_l = s->mute_l;
156		20	const int mute_r = s->mute_r;
157		20	const int phase_l = s->phase_l;
158		20	const int phase_r = s->phase_r;
159		20	double *buffer = s->buffer;
160			AVFrame *out;
161			double *dst;
162		20	int nbuf = inlink->sample_rate * (fabs(delay) / 1000.);
163			int n;
164
165		20	nbuf -= nbuf % 2;
166	✓✗	20	if (av_frame_is_writable(in)) {
167		20	out = in;
168			} else {
169			out = ff_get_audio_buffer(outlink, in->nb_samples);
170			if (!out) {
171			av_frame_free(&in);
172			return AVERROR(ENOMEM);
173			}
174			av_frame_copy_props(out, in);
175			}
176		20	dst = (double *)out->data[0];
177
178	✓✓	20500	for (n = 0; n < in->nb_samples; n++, src += 2, dst += 2) {
179		20480	double L = src[0], R = src[1], l, r, m, S, gl, gr, gd;
180
181		20480	L *= level_in;
182		20480	R *= level_in;
183
184	✗✓	20480	gl = 1. - FFMAX(0., balance_in);
185	✗✓	20480	gr = 1. + FFMIN(0., balance_in);
186	✗✗✓	20480	switch (s->bmode_in) {
187			case 1:
188			gd = gl - gr;
189			gl = 1. + gd;
190			gr = 1. - gd;
191			break;
192			case 2:
193			if (balance_in < 0.) {
194			gr = FFMAX(0.5, gr);
195			gl = 1. / gr;
196			} else if (balance_in > 0.) {
197			gl = FFMAX(0.5, gl);
198			gr = 1. / gl;
199			}
200			break;
201			}
202		20480	L *= gl;
203		20480	R *= gr;
204
205	✗✓	20480	if (s->softclip) {
206			R = s->inv_atan_shape * atan(R * sc_level);
207			L = s->inv_atan_shape * atan(L * sc_level);
208			}
209
210	✓✗✗✗ ✗✗✗✗ ✗✗	20480	switch (s->mode) {
211		20480	case 0:
212		20480	m = (L + R) * 0.5;
213		20480	S = (L - R) * 0.5;
214	✗✓✗✓	20480	l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal);
215	✗✓✗✓	20480	r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal);
216		20480	L = l;
217		20480	R = r;
218		20480	break;
219			case 1:
220			l = L * FFMIN(1., 2. - sbal);
221			r = R * FFMIN(1., sbal);
222			L = 0.5 * (l + r) * mlev;
223			R = 0.5 * (l - r) * slev;
224			break;
225			case 2:
226			l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal);
227			r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal);
228			L = l;
229			R = r;
230			break;
231			case 3:
232			R = L;
233			break;
234			case 4:
235			L = R;
236			break;
237			case 5:
238			L = (L + R) / 2;
239			R = L;
240			break;
241			case 6:
242			l = L;
243			L = R;
244			R = l;
245			m = (L + R) * 0.5;
246			S = (L - R) * 0.5;
247			l = m * mlev * FFMIN(1., 2. - mpan) + S * slev * FFMIN(1., 2. - sbal);
248			r = m * mlev * FFMIN(1., mpan) - S * slev * FFMIN(1., sbal);
249			L = l;
250			R = r;
251			break;
252			case 7:
253			l = L * mlev * FFMIN(1., 2. - mpan) + R * slev * FFMIN(1., 2. - sbal);
254			L = l;
255			R = l;
256			break;
257			case 8:
258			r = L * mlev * FFMIN(1., mpan) - R * slev * FFMIN(1., sbal);
259			L = r;
260			R = r;
261			break;
262			}
263
264		20480	L *= 1. - mute_l;
265		20480	R *= 1. - mute_r;
266
267		20480	L = (2. (1. - phase_l)) - 1.;
268		20480	R = (2. (1. - phase_r)) - 1.;
269
270		20480	buffer[s->pos ] = L;
271		20480	buffer[s->pos+1] = R;
272
273	✗✓	20480	if (delay > 0.) {
274			R = buffer[(s->pos - (int)nbuf + 1 + length) % length];
275	✗✓	20480	} else if (delay < 0.) {
276			L = buffer[(s->pos - (int)nbuf + length) % length];
277			}
278
279		20480	l = L + sb * L - sb * R;
280		20480	r = R + sb * R - sb * L;
281
282		20480	L = l;
283		20480	R = r;
284
285		20480	l = L * s->phase_cos_coef - R * s->phase_sin_coef;
286		20480	r = L * s->phase_sin_coef + R * s->phase_cos_coef;
287
288		20480	L = l;
289		20480	R = r;
290
291		20480	s->pos = (s->pos + 2) % s->length;
292
293	✗✓	20480	gl = 1. - FFMAX(0., balance_out);
294	✗✓	20480	gr = 1. + FFMIN(0., balance_out);
295	✗✗✓	20480	switch (s->bmode_out) {
296			case 1:
297			gd = gl - gr;
298			gl = 1. + gd;
299			gr = 1. - gd;
300			break;
301			case 2:
302			if (balance_out < 0.) {
303			gr = FFMAX(0.5, gr);
304			gl = 1. / gr;
305			} else if (balance_out > 0.) {
306			gl = FFMAX(0.5, gl);
307			gr = 1. / gl;
308			}
309			break;
310			}
311		20480	L *= gl;
312		20480	R *= gr;
313
314
315		20480	L *= level_out;
316		20480	R *= level_out;
317
318		20480	dst[0] = L;
319		20480	dst[1] = R;
320			}
321
322	✗✓	20	if (out != in)
323			av_frame_free(&in);
324		20	return ff_filter_frame(outlink, out);
325			}
326
327		1	static av_cold void uninit(AVFilterContext *ctx)
328			{
329		1	StereoToolsContext *s = ctx->priv;
330
331		1	av_freep(&s->buffer);
332		1	}
333
334			static const AVFilterPad inputs[] = {
335			{
336			.name = "default",
337			.type = AVMEDIA_TYPE_AUDIO,
338			.filter_frame = filter_frame,
339			.config_props = config_input,
340			},
341			{ NULL }
342			};
343
344			static const AVFilterPad outputs[] = {
345			{
346			.name = "default",
347			.type = AVMEDIA_TYPE_AUDIO,
348			},
349			{ NULL }
350			};
351
352			AVFilter ff_af_stereotools = {
353			.name = "stereotools",
354			.description = NULL_IF_CONFIG_SMALL("Apply various stereo tools."),
355			.query_formats = query_formats,
356			.priv_size = sizeof(StereoToolsContext),
357			.priv_class = &stereotools_class,
358			.uninit = uninit,
359			.inputs = inputs,
360			.outputs = outputs,
361			};