FFmpeg coverage

GCC Code Coverage Report

Directory:	../../../ffmpeg/		Exec	Total	Coverage
File:	src/libavfilter/af_volume.c	Lines:	125	216	57.9 %
Date:	2021-04-15 16:04:23	Branches:	47	116	40.5 %


/*
 * Copyright (c) 2011 Stefano Sabatini
 * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
 *
 * 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 volume filter
 */

#include "libavutil/channel_layout.h"
#include "libavutil/common.h"
#include "libavutil/eval.h"
#include "libavutil/ffmath.h"
#include "libavutil/float_dsp.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/replaygain.h"

#include "audio.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "af_volume.h"

static const char * const precision_str[] = {
    "fixed", "float", "double"
};

static const char *const var_names[] = {
    "n",                   ///< frame number (starting at zero)
    "nb_channels",         ///< number of channels
    "nb_consumed_samples", ///< number of samples consumed by the filter
    "nb_samples",          ///< number of samples in the current frame
    "pos",                 ///< position in the file of the frame
    "pts",                 ///< frame presentation timestamp
    "sample_rate",         ///< sample rate
    "startpts",            ///< PTS at start of stream
    "startt",              ///< time at start of stream
    "t",                   ///< time in the file of the frame
    "tb",                  ///< timebase
    "volume",              ///< last set value
    NULL
};

#define OFFSET(x) offsetof(VolumeContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM
#define F AV_OPT_FLAG_FILTERING_PARAM
#define T AV_OPT_FLAG_RUNTIME_PARAM

static const AVOption volume_options[] = {
    { "volume", "set volume adjustment expression",
            OFFSET(volume_expr), AV_OPT_TYPE_STRING, { .str = "1.0" }, .flags = A|F|T },
    { "precision", "select mathematical precision",
            OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A|F, "precision" },
        { "fixed",  "select 8-bit fixed-point",     0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED  }, INT_MIN, INT_MAX, A|F, "precision" },
        { "float",  "select 32-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT  }, INT_MIN, INT_MAX, A|F, "precision" },
        { "double", "select 64-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A|F, "precision" },
    { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_ONCE}, 0, EVAL_MODE_NB-1, .flags = A|F, "eval" },
         { "once",  "eval volume expression once", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_ONCE},  .flags = A|F, .unit = "eval" },
         { "frame", "eval volume expression per-frame",                  0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = A|F, .unit = "eval" },
    { "replaygain", "Apply replaygain side data when present",
            OFFSET(replaygain), AV_OPT_TYPE_INT, { .i64 = REPLAYGAIN_DROP }, REPLAYGAIN_DROP, REPLAYGAIN_ALBUM, A|F, "replaygain" },
        { "drop",   "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP   }, 0, 0, A|F, "replaygain" },
        { "ignore", "replaygain side data is ignored", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_IGNORE }, 0, 0, A|F, "replaygain" },
        { "track",  "track gain is preferred",         0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_TRACK  }, 0, 0, A|F, "replaygain" },
        { "album",  "album gain is preferred",         0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_ALBUM  }, 0, 0, A|F, "replaygain" },
    { "replaygain_preamp", "Apply replaygain pre-amplification",
            OFFSET(replaygain_preamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, -15.0, 15.0, A|F },
    { "replaygain_noclip", "Apply replaygain clipping prevention",
            OFFSET(replaygain_noclip), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, A|F },
    { NULL }
};

AVFILTER_DEFINE_CLASS(volume);

static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
{
    int ret;
    AVExpr *old = NULL;

    if (*pexpr)
        old = *pexpr;
    ret = av_expr_parse(pexpr, expr, var_names,
                        NULL, NULL, NULL, NULL, 0, log_ctx);
    if (ret < 0) {
        av_log(log_ctx, AV_LOG_ERROR,
               "Error when evaluating the volume expression '%s'\n", expr);
        *pexpr = old;
        return ret;
    }

    av_expr_free(old);
    return 0;
}

static av_cold int init(AVFilterContext *ctx)
{
    VolumeContext *vol = ctx->priv;

    vol->fdsp = avpriv_float_dsp_alloc(0);
    if (!vol->fdsp)
        return AVERROR(ENOMEM);

    return set_expr(&vol->volume_pexpr, vol->volume_expr, ctx);
}

static av_cold void uninit(AVFilterContext *ctx)
{
    VolumeContext *vol = ctx->priv;
    av_expr_free(vol->volume_pexpr);
    av_opt_free(vol);
    av_freep(&vol->fdsp);
}

static int query_formats(AVFilterContext *ctx)
{
    VolumeContext *vol = ctx->priv;
    AVFilterFormats *formats = NULL;
    AVFilterChannelLayouts *layouts;
    static const enum AVSampleFormat sample_fmts[][7] = {
        [PRECISION_FIXED] = {
            AV_SAMPLE_FMT_U8,
            AV_SAMPLE_FMT_U8P,
            AV_SAMPLE_FMT_S16,
            AV_SAMPLE_FMT_S16P,
            AV_SAMPLE_FMT_S32,
            AV_SAMPLE_FMT_S32P,
            AV_SAMPLE_FMT_NONE
        },
        [PRECISION_FLOAT] = {
            AV_SAMPLE_FMT_FLT,
            AV_SAMPLE_FMT_FLTP,
            AV_SAMPLE_FMT_NONE
        },
        [PRECISION_DOUBLE] = {
            AV_SAMPLE_FMT_DBL,
            AV_SAMPLE_FMT_DBLP,
            AV_SAMPLE_FMT_NONE
        }
    };
    int 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_make_format_list(sample_fmts[vol->precision]);
    if (!formats)
        return AVERROR(ENOMEM);
    ret = ff_set_common_formats(ctx, formats);
    if (ret < 0)
        return ret;

    formats = ff_all_samplerates();
    if (!formats)
        return AVERROR(ENOMEM);
    return ff_set_common_samplerates(ctx, formats);
}

static inline void scale_samples_u8(uint8_t *dst, const uint8_t *src,
                                    int nb_samples, int volume)
{
    int i;
    for (i = 0; i < nb_samples; i++)
        dst[i] = av_clip_uint8(((((int64_t)src[i] - 128) * volume + 128) >> 8) + 128);
}

static inline void scale_samples_u8_small(uint8_t *dst, const uint8_t *src,
                                          int nb_samples, int volume)
{
    int i;
    for (i = 0; i < nb_samples; i++)
        dst[i] = av_clip_uint8((((src[i] - 128) * volume + 128) >> 8) + 128);
}

static inline void scale_samples_s16(uint8_t *dst, const uint8_t *src,
                                     int nb_samples, int volume)
{
    int i;
    int16_t *smp_dst       = (int16_t *)dst;
    const int16_t *smp_src = (const int16_t *)src;
    for (i = 0; i < nb_samples; i++)
        smp_dst[i] = av_clip_int16(((int64_t)smp_src[i] * volume + 128) >> 8);
}

static inline void scale_samples_s16_small(uint8_t *dst, const uint8_t *src,
                                           int nb_samples, int volume)
{
    int i;
    int16_t *smp_dst       = (int16_t *)dst;
    const int16_t *smp_src = (const int16_t *)src;
    for (i = 0; i < nb_samples; i++)
        smp_dst[i] = av_clip_int16((smp_src[i] * volume + 128) >> 8);
}

static inline void scale_samples_s32(uint8_t *dst, const uint8_t *src,
                                     int nb_samples, int volume)
{
    int i;
    int32_t *smp_dst       = (int32_t *)dst;
    const int32_t *smp_src = (const int32_t *)src;
    for (i = 0; i < nb_samples; i++)
        smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
}

static av_cold void volume_init(VolumeContext *vol)
{
    vol->samples_align = 1;

    switch (av_get_packed_sample_fmt(vol->sample_fmt)) {
    case AV_SAMPLE_FMT_U8:
        if (vol->volume_i < 0x1000000)
            vol->scale_samples = scale_samples_u8_small;
        else
            vol->scale_samples = scale_samples_u8;
        break;
    case AV_SAMPLE_FMT_S16:
        if (vol->volume_i < 0x10000)
            vol->scale_samples = scale_samples_s16_small;
        else
            vol->scale_samples = scale_samples_s16;
        break;
    case AV_SAMPLE_FMT_S32:
        vol->scale_samples = scale_samples_s32;
        break;
    case AV_SAMPLE_FMT_FLT:
        vol->samples_align = 4;
        break;
    case AV_SAMPLE_FMT_DBL:
        vol->samples_align = 8;
        break;
    }

    if (ARCH_X86)
        ff_volume_init_x86(vol);
}

static int set_volume(AVFilterContext *ctx)
{
    VolumeContext *vol = ctx->priv;

    vol->volume = av_expr_eval(vol->volume_pexpr, vol->var_values, NULL);
    if (isnan(vol->volume)) {
        if (vol->eval_mode == EVAL_MODE_ONCE) {
            av_log(ctx, AV_LOG_ERROR, "Invalid value NaN for volume\n");
            return AVERROR(EINVAL);
        } else {
            av_log(ctx, AV_LOG_WARNING, "Invalid value NaN for volume, setting to 0\n");
            vol->volume = 0;
        }
    }
    vol->var_values[VAR_VOLUME] = vol->volume;

    av_log(ctx, AV_LOG_VERBOSE, "n:%f t:%f pts:%f precision:%s ",
           vol->var_values[VAR_N], vol->var_values[VAR_T], vol->var_values[VAR_PTS],
           precision_str[vol->precision]);

    if (vol->precision == PRECISION_FIXED) {
        vol->volume_i = (int)(vol->volume * 256 + 0.5);
        vol->volume   = vol->volume_i / 256.0;
        av_log(ctx, AV_LOG_VERBOSE, "volume_i:%d/255 ", vol->volume_i);
    }
    av_log(ctx, AV_LOG_VERBOSE, "volume:%f volume_dB:%f\n",
           vol->volume, 20.0*log10(vol->volume));

    volume_init(vol);
    return 0;
}

static int config_output(AVFilterLink *outlink)
{
    AVFilterContext *ctx = outlink->src;
    VolumeContext *vol   = ctx->priv;
    AVFilterLink *inlink = ctx->inputs[0];

    vol->sample_fmt = inlink->format;
    vol->channels   = inlink->channels;
    vol->planes     = av_sample_fmt_is_planar(inlink->format) ? vol->channels : 1;

    vol->var_values[VAR_N] =
    vol->var_values[VAR_NB_CONSUMED_SAMPLES] =
    vol->var_values[VAR_NB_SAMPLES] =
    vol->var_values[VAR_POS] =
    vol->var_values[VAR_PTS] =
    vol->var_values[VAR_STARTPTS] =
    vol->var_values[VAR_STARTT] =
    vol->var_values[VAR_T] =
    vol->var_values[VAR_VOLUME] = NAN;

    vol->var_values[VAR_NB_CHANNELS] = inlink->channels;
    vol->var_values[VAR_TB]          = av_q2d(inlink->time_base);
    vol->var_values[VAR_SAMPLE_RATE] = inlink->sample_rate;

    av_log(inlink->src, AV_LOG_VERBOSE, "tb:%f sample_rate:%f nb_channels:%f\n",
           vol->var_values[VAR_TB],
           vol->var_values[VAR_SAMPLE_RATE],
           vol->var_values[VAR_NB_CHANNELS]);

    return set_volume(ctx);
}

static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
                           char *res, int res_len, int flags)
{
    VolumeContext *vol = ctx->priv;
    int ret = AVERROR(ENOSYS);

    if (!strcmp(cmd, "volume")) {
        if ((ret = set_expr(&vol->volume_pexpr, args, ctx)) < 0)
            return ret;
        if (vol->eval_mode == EVAL_MODE_ONCE)
            set_volume(ctx);
    }

    return ret;
}

static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
    AVFilterContext *ctx = inlink->dst;
    VolumeContext *vol    = inlink->dst->priv;
    AVFilterLink *outlink = inlink->dst->outputs[0];
    int nb_samples        = buf->nb_samples;
    AVFrame *out_buf;
    int64_t pos;
    AVFrameSideData *sd = av_frame_get_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
    int ret;

    if (sd && vol->replaygain != REPLAYGAIN_IGNORE) {
        if (vol->replaygain != REPLAYGAIN_DROP) {
            AVReplayGain *replaygain = (AVReplayGain*)sd->data;
            int32_t gain  = 100000;
            uint32_t peak = 100000;
            float g, p;

            if (vol->replaygain == REPLAYGAIN_TRACK &&
                replaygain->track_gain != INT32_MIN) {
                gain = replaygain->track_gain;

                if (replaygain->track_peak != 0)
                    peak = replaygain->track_peak;
            } else if (replaygain->album_gain != INT32_MIN) {
                gain = replaygain->album_gain;

                if (replaygain->album_peak != 0)
                    peak = replaygain->album_peak;
            } else {
                av_log(inlink->dst, AV_LOG_WARNING, "Both ReplayGain gain "
                       "values are unknown.\n");
            }
            g = gain / 100000.0f;
            p = peak / 100000.0f;

            av_log(inlink->dst, AV_LOG_VERBOSE,
                   "Using gain %f dB from replaygain side data.\n", g);

            vol->volume   = ff_exp10((g + vol->replaygain_preamp) / 20);
            if (vol->replaygain_noclip)
                vol->volume = FFMIN(vol->volume, 1.0 / p);
            vol->volume_i = (int)(vol->volume * 256 + 0.5);

            volume_init(vol);
        }
        av_frame_remove_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
    }

    if (isnan(vol->var_values[VAR_STARTPTS])) {
        vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
        vol->var_values[VAR_STARTT  ] = TS2T(buf->pts, inlink->time_base);
    }
    vol->var_values[VAR_PTS] = TS2D(buf->pts);
    vol->var_values[VAR_T  ] = TS2T(buf->pts, inlink->time_base);
    vol->var_values[VAR_N  ] = inlink->frame_count_out;

    pos = buf->pkt_pos;
    vol->var_values[VAR_POS] = pos == -1 ? NAN : pos;
    if (vol->eval_mode == EVAL_MODE_FRAME)
        set_volume(ctx);

    if (vol->volume == 1.0 || vol->volume_i == 256) {
        out_buf = buf;
        goto end;
    }

    /* do volume scaling in-place if input buffer is writable */
    if (av_frame_is_writable(buf)
            && (vol->precision != PRECISION_FIXED || vol->volume_i > 0)) {
        out_buf = buf;
    } else {
        out_buf = ff_get_audio_buffer(outlink, nb_samples);
        if (!out_buf) {
            av_frame_free(&buf);
            return AVERROR(ENOMEM);
        }
        ret = av_frame_copy_props(out_buf, buf);
        if (ret < 0) {
            av_frame_free(&out_buf);
            av_frame_free(&buf);
            return ret;
        }
    }

    if (vol->precision != PRECISION_FIXED || vol->volume_i > 0) {
        int p, plane_samples;

        if (av_sample_fmt_is_planar(buf->format))
            plane_samples = FFALIGN(nb_samples, vol->samples_align);
        else
            plane_samples = FFALIGN(nb_samples * vol->channels, vol->samples_align);

        if (vol->precision == PRECISION_FIXED) {
            for (p = 0; p < vol->planes; p++) {
                vol->scale_samples(out_buf->extended_data[p],
                                   buf->extended_data[p], plane_samples,
                                   vol->volume_i);
            }
        } else if (av_get_packed_sample_fmt(vol->sample_fmt) == AV_SAMPLE_FMT_FLT) {
            for (p = 0; p < vol->planes; p++) {
                vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p],
                                             (const float *)buf->extended_data[p],
                                             vol->volume, plane_samples);
            }
        } else {
            for (p = 0; p < vol->planes; p++) {
                vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p],
                                             (const double *)buf->extended_data[p],
                                             vol->volume, plane_samples);
            }
        }
    }

    emms_c();

    if (buf != out_buf)
        av_frame_free(&buf);

end:
    vol->var_values[VAR_NB_CONSUMED_SAMPLES] += out_buf->nb_samples;
    return ff_filter_frame(outlink, out_buf);
}

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

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

AVFilter ff_af_volume = {
    .name           = "volume",
    .description    = NULL_IF_CONFIG_SMALL("Change input volume."),
    .query_formats  = query_formats,
    .priv_size      = sizeof(VolumeContext),
    .priv_class     = &volume_class,
    .init           = init,
    .uninit         = uninit,
    .inputs         = avfilter_af_volume_inputs,
    .outputs        = avfilter_af_volume_outputs,
    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
    .process_command = process_command,
};


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2011 Stefano Sabatini
3			* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
4			*
5			* This file is part of FFmpeg.
6			*
7			* FFmpeg is free software; you can redistribute it and/or
8			* modify it under the terms of the GNU Lesser General Public
9			* License as published by the Free Software Foundation; either
10			* version 2.1 of the License, or (at your option) any later version.
11			*
12			* FFmpeg is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15			* Lesser General Public License for more details.
16			*
17			* You should have received a copy of the GNU Lesser General Public
18			* License along with FFmpeg; if not, write to the Free Software
19			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20			*/
21
22			/**
23			* @file
24			* audio volume filter
25			*/
26
27			#include "libavutil/channel_layout.h"
28			#include "libavutil/common.h"
29			#include "libavutil/eval.h"
30			#include "libavutil/ffmath.h"
31			#include "libavutil/float_dsp.h"
32			#include "libavutil/intreadwrite.h"
33			#include "libavutil/opt.h"
34			#include "libavutil/replaygain.h"
35
36			#include "audio.h"
37			#include "avfilter.h"
38			#include "formats.h"
39			#include "internal.h"
40			#include "af_volume.h"
41
42			static const char * const precision_str[] = {
43			"fixed", "float", "double"
44			};
45
46			static const char *const var_names[] = {
47			"n", ///< frame number (starting at zero)
48			"nb_channels", ///< number of channels
49			"nb_consumed_samples", ///< number of samples consumed by the filter
50			"nb_samples", ///< number of samples in the current frame
51			"pos", ///< position in the file of the frame
52			"pts", ///< frame presentation timestamp
53			"sample_rate", ///< sample rate
54			"startpts", ///< PTS at start of stream
55			"startt", ///< time at start of stream
56			"t", ///< time in the file of the frame
57			"tb", ///< timebase
58			"volume", ///< last set value
59			NULL
60			};
61
62			#define OFFSET(x) offsetof(VolumeContext, x)
63			#define A AV_OPT_FLAG_AUDIO_PARAM
64			#define F AV_OPT_FLAG_FILTERING_PARAM
65			#define T AV_OPT_FLAG_RUNTIME_PARAM
66
67			static const AVOption volume_options[] = {
68			{ "volume", "set volume adjustment expression",
69			OFFSET(volume_expr), AV_OPT_TYPE_STRING, { .str = "1.0" }, .flags = A\|F\|T },
70			{ "precision", "select mathematical precision",
71			OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A\|F, "precision" },
72			{ "fixed", "select 8-bit fixed-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED }, INT_MIN, INT_MAX, A\|F, "precision" },
73			{ "float", "select 32-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT }, INT_MIN, INT_MAX, A\|F, "precision" },
74			{ "double", "select 64-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A\|F, "precision" },
75			{ "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_ONCE}, 0, EVAL_MODE_NB-1, .flags = A\|F, "eval" },
76			{ "once", "eval volume expression once", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_ONCE}, .flags = A\|F, .unit = "eval" },
77			{ "frame", "eval volume expression per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = A\|F, .unit = "eval" },
78			{ "replaygain", "Apply replaygain side data when present",
79			OFFSET(replaygain), AV_OPT_TYPE_INT, { .i64 = REPLAYGAIN_DROP }, REPLAYGAIN_DROP, REPLAYGAIN_ALBUM, A\|F, "replaygain" },
80			{ "drop", "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP }, 0, 0, A\|F, "replaygain" },
81			{ "ignore", "replaygain side data is ignored", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_IGNORE }, 0, 0, A\|F, "replaygain" },
82			{ "track", "track gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_TRACK }, 0, 0, A\|F, "replaygain" },
83			{ "album", "album gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_ALBUM }, 0, 0, A\|F, "replaygain" },
84			{ "replaygain_preamp", "Apply replaygain pre-amplification",
85			OFFSET(replaygain_preamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, -15.0, 15.0, A\|F },
86			{ "replaygain_noclip", "Apply replaygain clipping prevention",
87			OFFSET(replaygain_noclip), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, A\|F },
88			{ NULL }
89			};
90
91			AVFILTER_DEFINE_CLASS(volume);
92
93		2	static int set_expr(AVExpr *pexpr, const char expr, void *log_ctx)
94			{
95			int ret;
96		2	AVExpr *old = NULL;
97
98	✗✓	2	if (*pexpr)
99			old = *pexpr;
100		2	ret = av_expr_parse(pexpr, expr, var_names,
101			NULL, NULL, NULL, NULL, 0, log_ctx);
102	✗✓	2	if (ret < 0) {
103			av_log(log_ctx, AV_LOG_ERROR,
104			"Error when evaluating the volume expression '%s'\n", expr);
105			*pexpr = old;
106			return ret;
107			}
108
109		2	av_expr_free(old);
110		2	return 0;
111			}
112
113		2	static av_cold int init(AVFilterContext *ctx)
114			{
115		2	VolumeContext *vol = ctx->priv;
116
117		2	vol->fdsp = avpriv_float_dsp_alloc(0);
118	✗✓	2	if (!vol->fdsp)
119			return AVERROR(ENOMEM);
120
121		2	return set_expr(&vol->volume_pexpr, vol->volume_expr, ctx);
122			}
123
124		2	static av_cold void uninit(AVFilterContext *ctx)
125			{
126		2	VolumeContext *vol = ctx->priv;
127		2	av_expr_free(vol->volume_pexpr);
128		2	av_opt_free(vol);
129		2	av_freep(&vol->fdsp);
130		2	}
131
132		2	static int query_formats(AVFilterContext *ctx)
133			{
134		2	VolumeContext *vol = ctx->priv;
135		2	AVFilterFormats *formats = NULL;
136			AVFilterChannelLayouts *layouts;
137			static const enum AVSampleFormat sample_fmts[][7] = {
138			[PRECISION_FIXED] = {
139			AV_SAMPLE_FMT_U8,
140			AV_SAMPLE_FMT_U8P,
141			AV_SAMPLE_FMT_S16,
142			AV_SAMPLE_FMT_S16P,
143			AV_SAMPLE_FMT_S32,
144			AV_SAMPLE_FMT_S32P,
145			AV_SAMPLE_FMT_NONE
146			},
147			[PRECISION_FLOAT] = {
148			AV_SAMPLE_FMT_FLT,
149			AV_SAMPLE_FMT_FLTP,
150			AV_SAMPLE_FMT_NONE
151			},
152			[PRECISION_DOUBLE] = {
153			AV_SAMPLE_FMT_DBL,
154			AV_SAMPLE_FMT_DBLP,
155			AV_SAMPLE_FMT_NONE
156			}
157			};
158			int ret;
159
160		2	layouts = ff_all_channel_counts();
161	✗✓	2	if (!layouts)
162			return AVERROR(ENOMEM);
163		2	ret = ff_set_common_channel_layouts(ctx, layouts);
164	✗✓	2	if (ret < 0)
165			return ret;
166
167		2	formats = ff_make_format_list(sample_fmts[vol->precision]);
168	✗✓	2	if (!formats)
169			return AVERROR(ENOMEM);
170		2	ret = ff_set_common_formats(ctx, formats);
171	✗✓	2	if (ret < 0)
172			return ret;
173
174		2	formats = ff_all_samplerates();
175	✗✓	2	if (!formats)
176			return AVERROR(ENOMEM);
177		2	return ff_set_common_samplerates(ctx, formats);
178			}
179
180			static inline void scale_samples_u8(uint8_t dst, const uint8_t src,
181			int nb_samples, int volume)
182			{
183			int i;
184			for (i = 0; i < nb_samples; i++)
185			dst[i] = av_clip_uint8(((((int64_t)src[i] - 128) * volume + 128) >> 8) + 128);
186			}
187
188			static inline void scale_samples_u8_small(uint8_t dst, const uint8_t src,
189			int nb_samples, int volume)
190			{
191			int i;
192			for (i = 0; i < nb_samples; i++)
193			dst[i] = av_clip_uint8((((src[i] - 128) * volume + 128) >> 8) + 128);
194			}
195
196			static inline void scale_samples_s16(uint8_t dst, const uint8_t src,
197			int nb_samples, int volume)
198			{
199			int i;
200			int16_t smp_dst = (int16_t )dst;
201			const int16_t smp_src = (const int16_t )src;
202			for (i = 0; i < nb_samples; i++)
203			smp_dst[i] = av_clip_int16(((int64_t)smp_src[i] * volume + 128) >> 8);
204			}
205
206		259	static inline void scale_samples_s16_small(uint8_t dst, const uint8_t src,
207			int nb_samples, int volume)
208			{
209			int i;
210		259	int16_t smp_dst = (int16_t )dst;
211		259	const int16_t smp_src = (const int16_t )src;
212	✓✓	529459	for (i = 0; i < nb_samples; i++)
213		529200	smp_dst[i] = av_clip_int16((smp_src[i] * volume + 128) >> 8);
214		259	}
215
216			static inline void scale_samples_s32(uint8_t dst, const uint8_t src,
217			int nb_samples, int volume)
218			{
219			int i;
220			int32_t smp_dst = (int32_t )dst;
221			const int32_t smp_src = (const int32_t )src;
222			for (i = 0; i < nb_samples; i++)
223			smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
224			}
225
226		2	static av_cold void volume_init(VolumeContext *vol)
227			{
228		2	vol->samples_align = 1;
229
230	✗✓✗✓ ✗✗	2	switch (av_get_packed_sample_fmt(vol->sample_fmt)) {
231			case AV_SAMPLE_FMT_U8:
232			if (vol->volume_i < 0x1000000)
233			vol->scale_samples = scale_samples_u8_small;
234			else
235			vol->scale_samples = scale_samples_u8;
236			break;
237		1	case AV_SAMPLE_FMT_S16:
238	✓✗	1	if (vol->volume_i < 0x10000)
239		1	vol->scale_samples = scale_samples_s16_small;
240			else
241			vol->scale_samples = scale_samples_s16;
242		1	break;
243			case AV_SAMPLE_FMT_S32:
244			vol->scale_samples = scale_samples_s32;
245			break;
246		1	case AV_SAMPLE_FMT_FLT:
247		1	vol->samples_align = 4;
248		1	break;
249			case AV_SAMPLE_FMT_DBL:
250			vol->samples_align = 8;
251			break;
252			}
253
254		2	if (ARCH_X86)
255		2	ff_volume_init_x86(vol);
256		2	}
257
258		2	static int set_volume(AVFilterContext *ctx)
259			{
260		2	VolumeContext *vol = ctx->priv;
261
262		2	vol->volume = av_expr_eval(vol->volume_pexpr, vol->var_values, NULL);
263	✗✓	2	if (isnan(vol->volume)) {
264			if (vol->eval_mode == EVAL_MODE_ONCE) {
265			av_log(ctx, AV_LOG_ERROR, "Invalid value NaN for volume\n");
266			return AVERROR(EINVAL);
267			} else {
268			av_log(ctx, AV_LOG_WARNING, "Invalid value NaN for volume, setting to 0\n");
269			vol->volume = 0;
270			}
271			}
272		2	vol->var_values[VAR_VOLUME] = vol->volume;
273
274		2	av_log(ctx, AV_LOG_VERBOSE, "n:%f t:%f pts:%f precision:%s ",
275			vol->var_values[VAR_N], vol->var_values[VAR_T], vol->var_values[VAR_PTS],
276		2	precision_str[vol->precision]);
277
278	✓✓	2	if (vol->precision == PRECISION_FIXED) {
279		1	vol->volume_i = (int)(vol->volume * 256 + 0.5);
280		1	vol->volume = vol->volume_i / 256.0;
281		1	av_log(ctx, AV_LOG_VERBOSE, "volume_i:%d/255 ", vol->volume_i);
282			}
283		2	av_log(ctx, AV_LOG_VERBOSE, "volume:%f volume_dB:%f\n",
284		2	vol->volume, 20.0*log10(vol->volume));
285
286		2	volume_init(vol);
287		2	return 0;
288			}
289
290		2	static int config_output(AVFilterLink *outlink)
291			{
292		2	AVFilterContext *ctx = outlink->src;
293		2	VolumeContext *vol = ctx->priv;
294		2	AVFilterLink *inlink = ctx->inputs[0];
295
296		2	vol->sample_fmt = inlink->format;
297		2	vol->channels = inlink->channels;
298	✓✓	2	vol->planes = av_sample_fmt_is_planar(inlink->format) ? vol->channels : 1;
299
300		2	vol->var_values[VAR_N] =
301		2	vol->var_values[VAR_NB_CONSUMED_SAMPLES] =
302		2	vol->var_values[VAR_NB_SAMPLES] =
303		2	vol->var_values[VAR_POS] =
304		2	vol->var_values[VAR_PTS] =
305		2	vol->var_values[VAR_STARTPTS] =
306		2	vol->var_values[VAR_STARTT] =
307		2	vol->var_values[VAR_T] =
308		2	vol->var_values[VAR_VOLUME] = NAN;
309
310		2	vol->var_values[VAR_NB_CHANNELS] = inlink->channels;
311		2	vol->var_values[VAR_TB] = av_q2d(inlink->time_base);
312		2	vol->var_values[VAR_SAMPLE_RATE] = inlink->sample_rate;
313
314		2	av_log(inlink->src, AV_LOG_VERBOSE, "tb:%f sample_rate:%f nb_channels:%f\n",
315			vol->var_values[VAR_TB],
316			vol->var_values[VAR_SAMPLE_RATE],
317			vol->var_values[VAR_NB_CHANNELS]);
318
319		2	return set_volume(ctx);
320			}
321
322			static int process_command(AVFilterContext ctx, const char cmd, const char *args,
323			char *res, int res_len, int flags)
324			{
325			VolumeContext *vol = ctx->priv;
326			int ret = AVERROR(ENOSYS);
327
328			if (!strcmp(cmd, "volume")) {
329			if ((ret = set_expr(&vol->volume_pexpr, args, ctx)) < 0)
330			return ret;
331			if (vol->eval_mode == EVAL_MODE_ONCE)
332			set_volume(ctx);
333			}
334
335			return ret;
336			}
337
338		300	static int filter_frame(AVFilterLink inlink, AVFrame buf)
339			{
340		300	AVFilterContext *ctx = inlink->dst;
341		300	VolumeContext *vol = inlink->dst->priv;
342		300	AVFilterLink *outlink = inlink->dst->outputs[0];
343		300	int nb_samples = buf->nb_samples;
344			AVFrame *out_buf;
345			int64_t pos;
346		300	AVFrameSideData *sd = av_frame_get_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
347			int ret;
348
349	✗✓✗✗	300	if (sd && vol->replaygain != REPLAYGAIN_IGNORE) {
350			if (vol->replaygain != REPLAYGAIN_DROP) {
351			AVReplayGain replaygain = (AVReplayGain)sd->data;
352			int32_t gain = 100000;
353			uint32_t peak = 100000;
354			float g, p;
355
356			if (vol->replaygain == REPLAYGAIN_TRACK &&
357			replaygain->track_gain != INT32_MIN) {
358			gain = replaygain->track_gain;
359
360			if (replaygain->track_peak != 0)
361			peak = replaygain->track_peak;
362			} else if (replaygain->album_gain != INT32_MIN) {
363			gain = replaygain->album_gain;
364
365			if (replaygain->album_peak != 0)
366			peak = replaygain->album_peak;
367			} else {
368			av_log(inlink->dst, AV_LOG_WARNING, "Both ReplayGain gain "
369			"values are unknown.\n");
370			}
371			g = gain / 100000.0f;
372			p = peak / 100000.0f;
373
374			av_log(inlink->dst, AV_LOG_VERBOSE,
375			"Using gain %f dB from replaygain side data.\n", g);
376
377			vol->volume = ff_exp10((g + vol->replaygain_preamp) / 20);
378			if (vol->replaygain_noclip)
379			vol->volume = FFMIN(vol->volume, 1.0 / p);
380			vol->volume_i = (int)(vol->volume * 256 + 0.5);
381
382			volume_init(vol);
383			}
384			av_frame_remove_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
385			}
386
387	✓✓	300	if (isnan(vol->var_values[VAR_STARTPTS])) {
388	✓✗	2	vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
389	✓✗	2	vol->var_values[VAR_STARTT ] = TS2T(buf->pts, inlink->time_base);
390			}
391	✓✗	300	vol->var_values[VAR_PTS] = TS2D(buf->pts);
392	✓✗	300	vol->var_values[VAR_T ] = TS2T(buf->pts, inlink->time_base);
393		300	vol->var_values[VAR_N ] = inlink->frame_count_out;
394
395		300	pos = buf->pkt_pos;
396	✓✓	300	vol->var_values[VAR_POS] = pos == -1 ? NAN : pos;
397	✗✓	300	if (vol->eval_mode == EVAL_MODE_FRAME)
398			set_volume(ctx);
399
400	✓✗✗✓	300	if (vol->volume == 1.0 \|\| vol->volume_i == 256) {
401			out_buf = buf;
402			goto end;
403			}
404
405			/* do volume scaling in-place if input buffer is writable */
406	✓✗	300	if (av_frame_is_writable(buf)
407	✓✓✓✗	300	&& (vol->precision != PRECISION_FIXED \|\| vol->volume_i > 0)) {
408		300	out_buf = buf;
409			} else {
410			out_buf = ff_get_audio_buffer(outlink, nb_samples);
411			if (!out_buf) {
412			av_frame_free(&buf);
413			return AVERROR(ENOMEM);
414			}
415			ret = av_frame_copy_props(out_buf, buf);
416			if (ret < 0) {
417			av_frame_free(&out_buf);
418			av_frame_free(&buf);
419			return ret;
420			}
421			}
422
423	✓✓✓✗	300	if (vol->precision != PRECISION_FIXED \|\| vol->volume_i > 0) {
424			int p, plane_samples;
425
426	✓✓	300	if (av_sample_fmt_is_planar(buf->format))
427		41	plane_samples = FFALIGN(nb_samples, vol->samples_align);
428			else
429		259	plane_samples = FFALIGN(nb_samples * vol->channels, vol->samples_align);
430
431	✓✓	300	if (vol->precision == PRECISION_FIXED) {
432	✓✓	518	for (p = 0; p < vol->planes; p++) {
433		259	vol->scale_samples(out_buf->extended_data[p],
434		259	buf->extended_data[p], plane_samples,
435			vol->volume_i);
436			}
437	✓✗	41	} else if (av_get_packed_sample_fmt(vol->sample_fmt) == AV_SAMPLE_FMT_FLT) {
438	✓✓	123	for (p = 0; p < vol->planes; p++) {
439		82	vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p],
440		82	(const float *)buf->extended_data[p],
441		82	vol->volume, plane_samples);
442			}
443			} else {
444			for (p = 0; p < vol->planes; p++) {
445			vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p],
446			(const double *)buf->extended_data[p],
447			vol->volume, plane_samples);
448			}
449			}
450			}
451
452		300	emms_c();
453
454	✓✗	300	if (buf != out_buf)
455			av_frame_free(&buf);
456
457		300	end:
458		300	vol->var_values[VAR_NB_CONSUMED_SAMPLES] += out_buf->nb_samples;
459		300	return ff_filter_frame(outlink, out_buf);
460			}
461
462			static const AVFilterPad avfilter_af_volume_inputs[] = {
463			{
464			.name = "default",
465			.type = AVMEDIA_TYPE_AUDIO,
466			.filter_frame = filter_frame,
467			},
468			{ NULL }
469			};
470
471			static const AVFilterPad avfilter_af_volume_outputs[] = {
472			{
473			.name = "default",
474			.type = AVMEDIA_TYPE_AUDIO,
475			.config_props = config_output,
476			},
477			{ NULL }
478			};
479
480			AVFilter ff_af_volume = {
481			.name = "volume",
482			.description = NULL_IF_CONFIG_SMALL("Change input volume."),
483			.query_formats = query_formats,
484			.priv_size = sizeof(VolumeContext),
485			.priv_class = &volume_class,
486			.init = init,
487			.uninit = uninit,
488			.inputs = avfilter_af_volume_inputs,
489			.outputs = avfilter_af_volume_outputs,
490			.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
491			.process_command = process_command,
492			};