GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/avf_ahistogram.c Lines: 0 207 0.0 %
Date: 2020-09-25 23:16:12 Branches: 0 127 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2015 Paul B Mahol
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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 "libavutil/avassert.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "avfilter.h"
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#include "filters.h"
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#include "formats.h"
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#include "audio.h"
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#include "video.h"
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#include "internal.h"
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enum DisplayScale   { LINEAR, SQRT, CBRT, LOG, RLOG, NB_SCALES };
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enum AmplitudeScale { ALINEAR, ALOG, NB_ASCALES };
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enum SlideMode      { REPLACE, SCROLL, NB_SLIDES };
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enum DisplayMode    { SINGLE, SEPARATE, NB_DMODES };
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enum HistogramMode  { ACCUMULATE, CURRENT, NB_HMODES };
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typedef struct AudioHistogramContext {
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    const AVClass *class;
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    AVFrame *out;
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    int w, h;
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    AVRational frame_rate;
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    uint64_t *achistogram;
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    uint64_t *shistogram;
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    int ascale;
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    int scale;
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    float phisto;
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    int histogram_h;
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    int apos;
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    int ypos;
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    int slide;
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    int dmode;
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    int dchannels;
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    int count;
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    int frame_count;
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    float *combine_buffer;
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    AVFrame *in[101];
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    int first;
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    int nb_samples;
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} AudioHistogramContext;
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#define OFFSET(x) offsetof(AudioHistogramContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption ahistogram_options[] = {
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    { "dmode", "set method to display channels", OFFSET(dmode), AV_OPT_TYPE_INT, {.i64=SINGLE}, 0, NB_DMODES-1, FLAGS, "dmode" },
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        { "single", "all channels use single histogram", 0, AV_OPT_TYPE_CONST, {.i64=SINGLE},   0, 0, FLAGS, "dmode" },
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        { "separate", "each channel have own histogram", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "dmode" },
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    { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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    { "r",    "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="25"}, 0, INT_MAX, FLAGS },
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    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
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    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="hd720"}, 0, 0, FLAGS },
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    { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
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        { "log",  "logarithmic",         0, AV_OPT_TYPE_CONST, {.i64=LOG},    0, 0, FLAGS, "scale" },
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        { "sqrt", "square root",         0, AV_OPT_TYPE_CONST, {.i64=SQRT},   0, 0, FLAGS, "scale" },
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        { "cbrt", "cubic root",          0, AV_OPT_TYPE_CONST, {.i64=CBRT},   0, 0, FLAGS, "scale" },
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        { "lin",  "linear",              0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
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        { "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=RLOG},   0, 0, FLAGS, "scale" },
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    { "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=ALOG}, LINEAR, NB_ASCALES-1, FLAGS, "ascale" },
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        { "log",  "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=ALOG},    0, 0, FLAGS, "ascale" },
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        { "lin",  "linear",      0, AV_OPT_TYPE_CONST, {.i64=ALINEAR}, 0, 0, FLAGS, "ascale" },
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    { "acount", "how much frames to accumulate", OFFSET(count), AV_OPT_TYPE_INT, {.i64=1}, -1, 100, FLAGS },
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    { "rheight", "set histogram ratio of window height", OFFSET(phisto), AV_OPT_TYPE_FLOAT, {.dbl=0.10}, 0, 1, FLAGS },
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    { "slide", "set sonogram sliding", OFFSET(slide), AV_OPT_TYPE_INT, {.i64=REPLACE}, 0, NB_SLIDES-1, FLAGS, "slide" },
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        { "replace", "replace old rows with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE},    0, 0, FLAGS, "slide" },
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        { "scroll",  "scroll from top to bottom", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" },
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    { NULL }
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};
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AVFILTER_DEFINE_CLASS(ahistogram);
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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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    AVFilterLink *inlink = ctx->inputs[0];
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    AVFilterLink *outlink = ctx->outputs[0];
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    static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
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    static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE };
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    int ret = AVERROR(EINVAL);
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    formats = ff_make_format_list(sample_fmts);
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    if ((ret = ff_formats_ref         (formats, &inlink->outcfg.formats        )) < 0 ||
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        (layouts = ff_all_channel_counts()) == NULL ||
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        (ret = ff_channel_layouts_ref (layouts, &inlink->outcfg.channel_layouts)) < 0)
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        return ret;
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    formats = ff_all_samplerates();
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    if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
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        return ret;
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    formats = ff_make_format_list(pix_fmts);
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    if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
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        return ret;
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    return 0;
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}
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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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    AudioHistogramContext *s = ctx->priv;
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    s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
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    s->dchannels = s->dmode == SINGLE ? 1 : inlink->channels;
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    s->shistogram = av_calloc(s->w, s->dchannels * sizeof(*s->shistogram));
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    if (!s->shistogram)
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        return AVERROR(ENOMEM);
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    s->achistogram = av_calloc(s->w, s->dchannels * sizeof(*s->achistogram));
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    if (!s->achistogram)
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        return AVERROR(ENOMEM);
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    return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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    AudioHistogramContext *s = outlink->src->priv;
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    outlink->w = s->w;
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    outlink->h = s->h;
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    outlink->sample_aspect_ratio = (AVRational){1,1};
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    outlink->frame_rate = s->frame_rate;
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    s->histogram_h = s->h * s->phisto;
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    s->ypos = s->h * s->phisto;
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    if (s->dmode == SEPARATE) {
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        s->combine_buffer = av_malloc_array(outlink->w * 3, sizeof(*s->combine_buffer));
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        if (!s->combine_buffer)
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            return AVERROR(ENOMEM);
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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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    AVFilterLink *outlink = ctx->outputs[0];
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    AudioHistogramContext *s = ctx->priv;
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    const int H = s->histogram_h;
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    const int w = s->w;
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    int c, y, n, p, bin;
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    uint64_t acmax = 1;
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    AVFrame *clone;
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    if (!s->out || s->out->width  != outlink->w ||
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                   s->out->height != outlink->h) {
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        av_frame_free(&s->out);
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        s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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        if (!s->out) {
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            av_frame_free(&in);
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            return AVERROR(ENOMEM);
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        }
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        for (n = H; n < s->h; n++) {
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            memset(s->out->data[0] + n * s->out->linesize[0], 0, w);
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            memset(s->out->data[1] + n * s->out->linesize[0], 127, w);
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            memset(s->out->data[2] + n * s->out->linesize[0], 127, w);
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            memset(s->out->data[3] + n * s->out->linesize[0], 0, w);
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        }
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    }
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    if (s->dmode == SEPARATE) {
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        for (y = 0; y < w; y++) {
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            s->combine_buffer[3 * y    ] = 0;
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            s->combine_buffer[3 * y + 1] = 127.5;
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            s->combine_buffer[3 * y + 2] = 127.5;
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        }
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    }
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    for (n = 0; n < H; n++) {
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        memset(s->out->data[0] + n * s->out->linesize[0], 0, w);
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        memset(s->out->data[1] + n * s->out->linesize[0], 127, w);
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        memset(s->out->data[2] + n * s->out->linesize[0], 127, w);
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        memset(s->out->data[3] + n * s->out->linesize[0], 0, w);
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    }
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    s->out->pts = in->pts;
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    s->first = s->frame_count;
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    switch (s->ascale) {
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    case ALINEAR:
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        for (c = 0; c < inlink->channels; c++) {
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            const float *src = (const float *)in->extended_data[c];
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            uint64_t *achistogram = &s->achistogram[(s->dmode == SINGLE ? 0: c) * w];
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            for (n = 0; n < in->nb_samples; n++) {
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                bin = lrint(av_clipf(fabsf(src[n]), 0, 1) * (w - 1));
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                achistogram[bin]++;
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            }
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            if (s->in[s->first] && s->count >= 0) {
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                uint64_t *shistogram = &s->shistogram[(s->dmode == SINGLE ? 0: c) * w];
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                const float *src2 = (const float *)s->in[s->first]->extended_data[c];
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                for (n = 0; n < in->nb_samples; n++) {
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                    bin = lrint(av_clipf(fabsf(src2[n]), 0, 1) * (w - 1));
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                    shistogram[bin]++;
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                }
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            }
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        }
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        break;
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    case ALOG:
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        for (c = 0; c < inlink->channels; c++) {
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            const float *src = (const float *)in->extended_data[c];
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            uint64_t *achistogram = &s->achistogram[(s->dmode == SINGLE ? 0: c) * w];
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            for (n = 0; n < in->nb_samples; n++) {
232
                bin = lrint(av_clipf(1 + log10(fabsf(src[n])) / 6, 0, 1) * (w - 1));
233
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                achistogram[bin]++;
235
            }
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            if (s->in[s->first] && s->count >= 0) {
238
                uint64_t *shistogram = &s->shistogram[(s->dmode == SINGLE ? 0: c) * w];
239
                const float *src2 = (const float *)s->in[s->first]->extended_data[c];
240
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                for (n = 0; n < in->nb_samples; n++) {
242
                    bin = lrint(av_clipf(1 + log10(fabsf(src2[n])) / 6, 0, 1) * (w - 1));
243
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                    shistogram[bin]++;
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                }
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            }
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        }
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        break;
249
    }
250
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    av_frame_free(&s->in[s->frame_count]);
252
    s->in[s->frame_count] = in;
253
    s->frame_count++;
254
    if (s->frame_count > s->count)
255
        s->frame_count = 0;
256
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    for (n = 0; n < w * s->dchannels; n++) {
258
        acmax = FFMAX(s->achistogram[n] - s->shistogram[n], acmax);
259
    }
260
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    for (c = 0; c < s->dchannels; c++) {
262
        uint64_t *shistogram  = &s->shistogram[c * w];
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        uint64_t *achistogram = &s->achistogram[c * w];
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        float yf, uf, vf;
265
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        if (s->dmode == SEPARATE) {
267
            yf = 256.0f / s->dchannels;
268
            uf = yf * M_PI;
269
            vf = yf * M_PI;
270
            uf *= 0.5 * sin((2 * M_PI * c) / s->dchannels);
271
            vf *= 0.5 * cos((2 * M_PI * c) / s->dchannels);
272
        }
273
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        for (n = 0; n < w; n++) {
275
            double a, aa;
276
            int h;
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            a = achistogram[n] - shistogram[n];
279
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            switch (s->scale) {
281
            case LINEAR:
282
                aa = a / (double)acmax;
283
                break;
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            case SQRT:
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                aa = sqrt(a) / sqrt(acmax);
286
                break;
287
            case CBRT:
288
                aa = cbrt(a) / cbrt(acmax);
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                break;
290
            case LOG:
291
                aa = log2(a + 1) / log2(acmax + 1);
292
                break;
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            case RLOG:
294
                aa = 1. - log2(a + 1) / log2(acmax + 1);
295
                if (aa == 1.)
296
                    aa = 0;
297
                break;
298
            default:
299
                av_assert0(0);
300
            }
301
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            h = aa * (H - 1);
303
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            if (s->dmode == SINGLE) {
305
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                for (y = H - h; y < H; y++) {
307
                    s->out->data[0][y * s->out->linesize[0] + n] = 255;
308
                    s->out->data[3][y * s->out->linesize[0] + n] = 255;
309
                }
310
311
                if (s->h - H > 0) {
312
                    h = aa * 255;
313
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                    s->out->data[0][s->ypos * s->out->linesize[0] + n] = h;
315
                    s->out->data[1][s->ypos * s->out->linesize[1] + n] = 127;
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                    s->out->data[2][s->ypos * s->out->linesize[2] + n] = 127;
317
                    s->out->data[3][s->ypos * s->out->linesize[3] + n] = 255;
318
                }
319
            } else if (s->dmode == SEPARATE) {
320
                float *out = &s->combine_buffer[3 * n];
321
                int old;
322
323
                old = s->out->data[0][(H - h) * s->out->linesize[0] + n];
324
                for (y = H - h; y < H; y++) {
325
                    if (s->out->data[0][y * s->out->linesize[0] + n] != old)
326
                        break;
327
                    old = s->out->data[0][y * s->out->linesize[0] + n];
328
                    s->out->data[0][y * s->out->linesize[0] + n] = yf;
329
                    s->out->data[1][y * s->out->linesize[1] + n] = 128+uf;
330
                    s->out->data[2][y * s->out->linesize[2] + n] = 128+vf;
331
                    s->out->data[3][y * s->out->linesize[3] + n] = 255;
332
                }
333
334
                out[0] += aa * yf;
335
                out[1] += aa * uf;
336
                out[2] += aa * vf;
337
            }
338
        }
339
    }
340
341
    if (s->h - H > 0) {
342
        if (s->dmode == SEPARATE) {
343
            for (n = 0; n < w; n++) {
344
                float *cb = &s->combine_buffer[3 * n];
345
346
                s->out->data[0][s->ypos * s->out->linesize[0] + n] = cb[0];
347
                s->out->data[1][s->ypos * s->out->linesize[1] + n] = cb[1];
348
                s->out->data[2][s->ypos * s->out->linesize[2] + n] = cb[2];
349
                s->out->data[3][s->ypos * s->out->linesize[3] + n] = 255;
350
            }
351
        }
352
353
        if (s->slide == SCROLL) {
354
            for (p = 0; p < 4; p++) {
355
                for (y = s->h; y >= H + 1; y--) {
356
                    memmove(s->out->data[p] + (y  ) * s->out->linesize[p],
357
                            s->out->data[p] + (y-1) * s->out->linesize[p], w);
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                }
359
            }
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        }
361
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        s->ypos++;
363
        if (s->slide == SCROLL || s->ypos >= s->h)
364
            s->ypos = H;
365
    }
366
367
    clone = av_frame_clone(s->out);
368
    if (!clone)
369
        return AVERROR(ENOMEM);
370
371
    return ff_filter_frame(outlink, clone);
372
}
373
374
static int activate(AVFilterContext *ctx)
375
{
376
    AVFilterLink *inlink = ctx->inputs[0];
377
    AVFilterLink *outlink = ctx->outputs[0];
378
    AudioHistogramContext *s = ctx->priv;
379
    AVFrame *in;
380
    int ret;
381
382
    FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
383
384
    ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
385
    if (ret < 0)
386
        return ret;
387
    if (ret > 0)
388
        return filter_frame(inlink, in);
389
390
    FF_FILTER_FORWARD_STATUS(inlink, outlink);
391
    FF_FILTER_FORWARD_WANTED(outlink, inlink);
392
393
    return FFERROR_NOT_READY;
394
}
395
396
static av_cold void uninit(AVFilterContext *ctx)
397
{
398
    AudioHistogramContext *s = ctx->priv;
399
    int i;
400
401
    av_frame_free(&s->out);
402
    av_freep(&s->shistogram);
403
    av_freep(&s->achistogram);
404
    av_freep(&s->combine_buffer);
405
    for (i = 0; i < 101; i++)
406
        av_frame_free(&s->in[i]);
407
}
408
409
static const AVFilterPad ahistogram_inputs[] = {
410
    {
411
        .name         = "default",
412
        .type         = AVMEDIA_TYPE_AUDIO,
413
        .config_props = config_input,
414
    },
415
    { NULL }
416
};
417
418
static const AVFilterPad ahistogram_outputs[] = {
419
    {
420
        .name         = "default",
421
        .type         = AVMEDIA_TYPE_VIDEO,
422
        .config_props = config_output,
423
    },
424
    { NULL }
425
};
426
427
AVFilter ff_avf_ahistogram = {
428
    .name          = "ahistogram",
429
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to histogram video output."),
430
    .uninit        = uninit,
431
    .query_formats = query_formats,
432
    .priv_size     = sizeof(AudioHistogramContext),
433
    .activate      = activate,
434
    .inputs        = ahistogram_inputs,
435
    .outputs       = ahistogram_outputs,
436
    .priv_class    = &ahistogram_class,
437
};