GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/af_aderivative.c Lines: 0 58 0.0 %
Date: 2020-09-25 14:59:26 Branches: 0 50 0.0 %

Line Branch Exec Source
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/*
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "audio.h"
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#include "avfilter.h"
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#include "internal.h"
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typedef struct ADerivativeContext {
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    const AVClass *class;
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    AVFrame *prev;
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    void (*filter)(void **dst, void **prv, const void **src,
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                   int nb_samples, int channels);
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} ADerivativeContext;
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static int query_formats(AVFilterContext *ctx)
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{
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    AVFilterFormats *formats = NULL;
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    AVFilterChannelLayouts *layouts = NULL;
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    static const enum AVSampleFormat derivative_sample_fmts[] = {
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        AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_FLTP,
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        AV_SAMPLE_FMT_S32P, AV_SAMPLE_FMT_DBLP,
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        AV_SAMPLE_FMT_NONE
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    };
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    static const enum AVSampleFormat integral_sample_fmts[] = {
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        AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP,
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        AV_SAMPLE_FMT_NONE
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    };
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    int ret;
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    formats = ff_make_format_list(strcmp(ctx->filter->name, "aintegral") ?
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                                  derivative_sample_fmts : integral_sample_fmts);
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    if (!formats)
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        return AVERROR(ENOMEM);
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    ret = ff_set_common_formats(ctx, formats);
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    if (ret < 0)
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        return ret;
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    layouts = ff_all_channel_counts();
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    if (!layouts)
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        return AVERROR(ENOMEM);
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    ret = ff_set_common_channel_layouts(ctx, layouts);
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    if (ret < 0)
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        return ret;
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    formats = ff_all_samplerates();
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    return ff_set_common_samplerates(ctx, formats);
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}
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#define DERIVATIVE(name, type)                                          \
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static void aderivative_## name ##p(void **d, void **p, const void **s, \
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                                    int nb_samples, int channels)       \
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{                                                                       \
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    int n, c;                                                           \
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                                                                        \
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    for (c = 0; c < channels; c++) {                                    \
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        const type *src = s[c];                                         \
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        type *dst = d[c];                                               \
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        type *prv = p[c];                                               \
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                                                                        \
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        for (n = 0; n < nb_samples; n++) {                              \
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            const type current = src[n];                                \
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                                                                        \
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            dst[n] = current - prv[0];                                  \
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            prv[0] = current;                                           \
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        }                                                               \
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    }                                                                   \
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}
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DERIVATIVE(flt, float)
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DERIVATIVE(dbl, double)
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DERIVATIVE(s16, int16_t)
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DERIVATIVE(s32, int32_t)
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#define INTEGRAL(name, type)                                          \
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static void aintegral_## name ##p(void **d, void **p, const void **s, \
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                                  int nb_samples, int channels)       \
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{                                                                     \
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    int n, c;                                                         \
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                                                                      \
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    for (c = 0; c < channels; c++) {                                  \
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        const type *src = s[c];                                       \
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        type *dst = d[c];                                             \
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        type *prv = p[c];                                             \
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                                                                      \
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        for (n = 0; n < nb_samples; n++) {                            \
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            const type current = src[n];                              \
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                                                                      \
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            dst[n] = current + prv[0];                                \
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            prv[0] = dst[n];                                          \
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        }                                                             \
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    }                                                                 \
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}
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INTEGRAL(flt, float)
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INTEGRAL(dbl, double)
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static int config_input(AVFilterLink *inlink)
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{
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    AVFilterContext *ctx = inlink->dst;
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    ADerivativeContext *s = ctx->priv;
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    switch (inlink->format) {
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    case AV_SAMPLE_FMT_FLTP: s->filter = aderivative_fltp; break;
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    case AV_SAMPLE_FMT_DBLP: s->filter = aderivative_dblp; break;
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    case AV_SAMPLE_FMT_S32P: s->filter = aderivative_s32p; break;
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    case AV_SAMPLE_FMT_S16P: s->filter = aderivative_s16p; break;
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    }
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    if (strcmp(ctx->filter->name, "aintegral"))
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        return 0;
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    switch (inlink->format) {
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    case AV_SAMPLE_FMT_FLTP: s->filter = aintegral_fltp; break;
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    case AV_SAMPLE_FMT_DBLP: s->filter = aintegral_dblp; break;
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    }
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    return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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    AVFilterContext *ctx = inlink->dst;
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    ADerivativeContext *s = ctx->priv;
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    AVFilterLink *outlink = ctx->outputs[0];
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    AVFrame *out = ff_get_audio_buffer(outlink, in->nb_samples);
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    if (!out) {
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        av_frame_free(&in);
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        return AVERROR(ENOMEM);
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    }
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    av_frame_copy_props(out, in);
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    if (!s->prev) {
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        s->prev = ff_get_audio_buffer(inlink, 1);
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        if (!s->prev) {
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            av_frame_free(&in);
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            return AVERROR(ENOMEM);
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        }
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    }
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    s->filter((void **)out->extended_data, (void **)s->prev->extended_data, (const void **)in->extended_data,
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              in->nb_samples, in->channels);
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    av_frame_free(&in);
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    return ff_filter_frame(outlink, out);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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    ADerivativeContext *s = ctx->priv;
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    av_frame_free(&s->prev);
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}
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static const AVFilterPad aderivative_inputs[] = {
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    {
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        .name         = "default",
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        .type         = AVMEDIA_TYPE_AUDIO,
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        .filter_frame = filter_frame,
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        .config_props = config_input,
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    },
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    { NULL }
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};
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static const AVFilterPad aderivative_outputs[] = {
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    {
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        .name = "default",
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        .type = AVMEDIA_TYPE_AUDIO,
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    },
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    { NULL }
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};
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AVFilter ff_af_aderivative = {
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    .name          = "aderivative",
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    .description   = NULL_IF_CONFIG_SMALL("Compute derivative of input audio."),
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    .query_formats = query_formats,
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    .priv_size     = sizeof(ADerivativeContext),
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    .uninit        = uninit,
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    .inputs        = aderivative_inputs,
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    .outputs       = aderivative_outputs,
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};
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AVFilter ff_af_aintegral = {
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    .name          = "aintegral",
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    .description   = NULL_IF_CONFIG_SMALL("Compute integral of input audio."),
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    .query_formats = query_formats,
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    .priv_size     = sizeof(ADerivativeContext),
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    .uninit        = uninit,
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    .inputs        = aderivative_inputs,
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    .outputs       = aderivative_outputs,
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};