GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/avf_showvolume.c Lines: 0 221 0.0 %
Date: 2020-09-25 23:16:12 Branches: 0 157 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/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/eval.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/xga_font_data.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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static const char *const var_names[] = {   "VOLUME",   "CHANNEL",   "PEAK",        NULL };
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enum                                   { VAR_VOLUME, VAR_CHANNEL, VAR_PEAK, VAR_VARS_NB };
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enum DisplayScale   { LINEAR, LOG, NB_DISPLAY_SCALE };
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typedef struct ShowVolumeContext {
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    const AVClass *class;
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    int w, h;
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    int b;
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    double f;
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    AVRational frame_rate;
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    char *color;
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    int orientation;
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    int step;
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    float bgopacity;
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    int mode;
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    int nb_samples;
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    AVFrame *out;
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    AVExpr *c_expr;
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    int draw_text;
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    int draw_volume;
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    double *values;
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    uint32_t *color_lut;
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    float *max;
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    float rms_factor;
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    int display_scale;
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    double draw_persistent_duration; /* in second */
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    uint8_t persistant_max_rgba[4];
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    int persistent_max_frames; /* number of frames to check max value */
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    float *max_persistent; /* max value for draw_persistent_max for each channel */
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    int *nb_frames_max_display; /* number of frame for each channel, for displaying the max value */
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    void (*meter)(float *src, int nb_samples, float *max, float factor);
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} ShowVolumeContext;
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#define OFFSET(x) offsetof(ShowVolumeContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption showvolume_options[] = {
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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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    { "b", "set border width",   OFFSET(b), AV_OPT_TYPE_INT, {.i64=1}, 0, 5, FLAGS },
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    { "w", "set channel width",  OFFSET(w), AV_OPT_TYPE_INT, {.i64=400}, 80, 8192, FLAGS },
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    { "h", "set channel height", OFFSET(h), AV_OPT_TYPE_INT, {.i64=20}, 1, 900, FLAGS },
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    { "f", "set fade",           OFFSET(f), AV_OPT_TYPE_DOUBLE, {.dbl=0.95}, 0, 1, FLAGS },
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    { "c", "set volume color expression", OFFSET(color), AV_OPT_TYPE_STRING, {.str="PEAK*255+floor((1-PEAK)*255)*256+0xff000000"}, 0, 0, FLAGS },
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    { "t", "display channel names", OFFSET(draw_text), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
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    { "v", "display volume value", OFFSET(draw_volume), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
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    { "dm", "duration for max value display", OFFSET(draw_persistent_duration), AV_OPT_TYPE_DOUBLE, {.dbl=0.}, 0, 9000, FLAGS},
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    { "dmc","set color of the max value line", OFFSET(persistant_max_rgba), AV_OPT_TYPE_COLOR, {.str = "orange"}, 0, 0, FLAGS },
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    { "o", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "orientation" },
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    {   "h", "horizontal", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "orientation" },
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    {   "v", "vertical",   0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "orientation" },
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    { "s", "set step size", OFFSET(step), AV_OPT_TYPE_INT, {.i64=0}, 0, 5, FLAGS },
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    { "p", "set background opacity", OFFSET(bgopacity), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, FLAGS },
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    { "m", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "mode" },
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    {   "p", "peak", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" },
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    {   "r", "rms",  0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" },
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    { "ds", "set display scale", OFFSET(display_scale), AV_OPT_TYPE_INT, {.i64=LINEAR}, LINEAR, NB_DISPLAY_SCALE - 1, FLAGS, "display_scale" },
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    {   "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "display_scale" },
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    {   "log", "log",  0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "display_scale" },
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    { NULL }
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};
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AVFILTER_DEFINE_CLASS(showvolume);
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static av_cold int init(AVFilterContext *ctx)
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{
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    ShowVolumeContext *s = ctx->priv;
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    int ret;
106
107
    if (s->color) {
108
        ret = av_expr_parse(&s->c_expr, s->color, var_names,
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                            NULL, NULL, NULL, NULL, 0, ctx);
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        if (ret < 0)
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            return ret;
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    }
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    return 0;
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}
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static int query_formats(AVFilterContext *ctx)
118
{
119
    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_RGBA, AV_PIX_FMT_NONE };
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    int ret;
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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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        return ret;
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    layouts = ff_all_channel_counts();
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    if ((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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139
    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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143
    return 0;
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}
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static void find_peak(float *src, int nb_samples, float *peak, float factor)
147
{
148
    int i;
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    *peak = 0;
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    for (i = 0; i < nb_samples; i++)
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        *peak = FFMAX(*peak, FFABS(src[i]));
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}
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static void find_rms(float *src, int nb_samples, float *rms, float factor)
156
{
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    int i;
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    for (i = 0; i < nb_samples; i++)
160
        *rms += factor * (src[i] * src[i] - *rms);
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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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    ShowVolumeContext *s = ctx->priv;
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168
    s->nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
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    s->values = av_calloc(inlink->channels * VAR_VARS_NB, sizeof(double));
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    if (!s->values)
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        return AVERROR(ENOMEM);
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    s->color_lut = av_calloc(s->w, sizeof(*s->color_lut) * inlink->channels);
174
    if (!s->color_lut)
175
        return AVERROR(ENOMEM);
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    s->max = av_calloc(inlink->channels, sizeof(*s->max));
178
    if (!s->max)
179
        return AVERROR(ENOMEM);
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    s->rms_factor = 10000. / inlink->sample_rate;
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183
    switch (s->mode) {
184
    case 0: s->meter = find_peak; break;
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    case 1: s->meter = find_rms;  break;
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    default: return AVERROR_BUG;
187
    }
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    if (s->draw_persistent_duration > 0.) {
190
        s->persistent_max_frames = (int) FFMAX(av_q2d(s->frame_rate) * s->draw_persistent_duration, 1.);
191
        s->max_persistent = av_calloc(inlink->channels * s->persistent_max_frames, sizeof(*s->max_persistent));
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        s->nb_frames_max_display = av_calloc(inlink->channels * s->persistent_max_frames, sizeof(*s->nb_frames_max_display));
193
    }
194
    return 0;
195
}
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static int config_output(AVFilterLink *outlink)
198
{
199
    ShowVolumeContext *s = outlink->src->priv;
200
    AVFilterLink *inlink = outlink->src->inputs[0];
201
    int ch;
202
203
    if (s->orientation) {
204
        outlink->h = s->w;
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        outlink->w = s->h * inlink->channels + (inlink->channels - 1) * s->b;
206
    } else {
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        outlink->w = s->w;
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        outlink->h = s->h * inlink->channels + (inlink->channels - 1) * s->b;
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    }
210
211
    outlink->sample_aspect_ratio = (AVRational){1,1};
212
    outlink->frame_rate = s->frame_rate;
213
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    for (ch = 0; ch < inlink->channels; ch++) {
215
        int i;
216
217
        for (i = 0; i < s->w; i++) {
218
            float max = i / (float)(s->w - 1);
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220
            s->values[ch * VAR_VARS_NB + VAR_PEAK] = max;
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            s->values[ch * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
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            s->values[ch * VAR_VARS_NB + VAR_CHANNEL] = ch;
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            s->color_lut[ch * s->w + i] = av_expr_eval(s->c_expr, &s->values[ch * VAR_VARS_NB], NULL);
224
        }
225
    }
226
227
    return 0;
228
}
229
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static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
231
{
232
    const uint8_t *font;
233
    int font_height;
234
    int i;
235
236
    font = avpriv_cga_font,   font_height =  8;
237
238
    for (i = 0; txt[i]; i++) {
239
        int char_y, mask;
240
241
        if (o) { /* vertical orientation */
242
            for (char_y = font_height - 1; char_y >= 0; char_y--) {
243
                uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x * 4;
244
                for (mask = 0x80; mask; mask >>= 1) {
245
                    if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
246
                        AV_WN32(&p[char_y * 4], ~AV_RN32(&p[char_y * 4]));
247
                    p += pic->linesize[0];
248
                }
249
            }
250
        } else { /* horizontal orientation */
251
            uint8_t *p = pic->data[0] + y * pic->linesize[0] + (x + i * 8) * 4;
252
            for (char_y = 0; char_y < font_height; char_y++) {
253
                for (mask = 0x80; mask; mask >>= 1) {
254
                    if (font[txt[i] * font_height + char_y] & mask)
255
                        AV_WN32(p, ~AV_RN32(p));
256
                    p += 4;
257
                }
258
                p += pic->linesize[0] - 8 * 4;
259
            }
260
        }
261
    }
262
}
263
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static void clear_picture(ShowVolumeContext *s, AVFilterLink *outlink)
265
{
266
    int i, j;
267
    const uint32_t bg = (uint32_t)(s->bgopacity * 255) << 24;
268
269
    for (i = 0; i < outlink->h; i++) {
270
        uint32_t *dst = (uint32_t *)(s->out->data[0] + i * s->out->linesize[0]);
271
        for (j = 0; j < outlink->w; j++)
272
            AV_WN32A(dst + j, bg);
273
    }
274
}
275
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static inline int calc_max_draw(ShowVolumeContext *s, AVFilterLink *outlink, float max)
277
{
278
    float max_val;
279
    if (s->display_scale == LINEAR) {
280
        max_val = max;
281
    } else { /* log */
282
        max_val = av_clipf(0.21 * log10(max) + 1, 0, 1);
283
    }
284
    if (s->orientation) { /* vertical */
285
        return outlink->h - outlink->h * max_val;
286
    } else { /* horizontal */
287
        return s->w * max_val;
288
    }
289
}
290
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static inline void calc_persistent_max(ShowVolumeContext *s, float max, int channel)
292
{
293
    /* update max value for persistent max display */
294
    if ((max >= s->max_persistent[channel]) || (s->nb_frames_max_display[channel] >= s->persistent_max_frames)) { /* update max value for display */
295
        s->max_persistent[channel] = max;
296
        s->nb_frames_max_display[channel] = 0;
297
    } else {
298
        s->nb_frames_max_display[channel] += 1; /* incremente display frame count */
299
    }
300
}
301
302
static inline void draw_max_line(ShowVolumeContext *s, int max_draw, int channel)
303
{
304
    int k;
305
    if (s->orientation) { /* vertical */
306
        uint8_t *dst = s->out->data[0] + max_draw * s->out->linesize[0] + channel * (s->b + s->h) * 4;
307
        for (k = 0; k < s->h; k++) {
308
            memcpy(dst + k * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
309
        }
310
    } else { /* horizontal */
311
        for (k = 0; k < s->h; k++) {
312
            uint8_t *dst = s->out->data[0] + (channel * s->h + channel * s->b + k) * s->out->linesize[0];
313
            memcpy(dst + max_draw * 4, s->persistant_max_rgba, sizeof(s->persistant_max_rgba));
314
        }
315
    }
316
}
317
318
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
319
{
320
    AVFilterContext *ctx = inlink->dst;
321
    AVFilterLink *outlink = ctx->outputs[0];
322
    ShowVolumeContext *s = ctx->priv;
323
    const int step = s->step;
324
    int c, j, k, max_draw;
325
    AVFrame *out;
326
327
    if (!s->out || s->out->width  != outlink->w ||
328
                   s->out->height != outlink->h) {
329
        av_frame_free(&s->out);
330
        s->out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
331
        if (!s->out) {
332
            av_frame_free(&insamples);
333
            return AVERROR(ENOMEM);
334
        }
335
        clear_picture(s, outlink);
336
    }
337
    s->out->pts = insamples->pts;
338
339
    if ((s->f < 1.) && (s->f > 0.)) {
340
        for (j = 0; j < outlink->h; j++) {
341
            uint8_t *dst = s->out->data[0] + j * s->out->linesize[0];
342
            const uint32_t alpha = s->bgopacity * 255;
343
344
            for (k = 0; k < outlink->w; k++) {
345
                dst[k * 4 + 0] = FFMAX(dst[k * 4 + 0] * s->f, 0);
346
                dst[k * 4 + 1] = FFMAX(dst[k * 4 + 1] * s->f, 0);
347
                dst[k * 4 + 2] = FFMAX(dst[k * 4 + 2] * s->f, 0);
348
                dst[k * 4 + 3] = FFMAX(dst[k * 4 + 3] * s->f, alpha);
349
            }
350
        }
351
    } else if (s->f == 0.) {
352
        clear_picture(s, outlink);
353
    }
354
355
    if (s->orientation) { /* vertical */
356
        for (c = 0; c < inlink->channels; c++) {
357
            float *src = (float *)insamples->extended_data[c];
358
            uint32_t *lut = s->color_lut + s->w * c;
359
            float max;
360
361
            s->meter(src, insamples->nb_samples, &s->max[c], s->rms_factor);
362
            max = s->max[c];
363
364
            s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
365
            max = av_clipf(max, 0, 1);
366
            max_draw = calc_max_draw(s, outlink, max);
367
368
            for (j = max_draw; j < s->w; j++) {
369
                uint8_t *dst = s->out->data[0] + j * s->out->linesize[0] + c * (s->b + s->h) * 4;
370
                for (k = 0; k < s->h; k++) {
371
                    AV_WN32A(&dst[k * 4], lut[s->w - j - 1]);
372
                    if (j & step)
373
                        j += step;
374
                }
375
            }
376
377
            if (s->h >= 8 && s->draw_text) {
378
                const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c));
379
                if (!channel_name)
380
                    continue;
381
                drawtext(s->out, c * (s->h + s->b) + (s->h - 10) / 2, outlink->h - 35, channel_name, 1);
382
            }
383
384
            if (s->draw_persistent_duration > 0.) {
385
                calc_persistent_max(s, max, c);
386
                max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
387
                draw_max_line(s, max_draw, c);
388
            }
389
        }
390
    } else { /* horizontal */
391
        for (c = 0; c < inlink->channels; c++) {
392
            float *src = (float *)insamples->extended_data[c];
393
            uint32_t *lut = s->color_lut + s->w * c;
394
            float max;
395
396
            s->meter(src, insamples->nb_samples, &s->max[c], s->rms_factor);
397
            max = s->max[c];
398
399
            s->values[c * VAR_VARS_NB + VAR_VOLUME] = 20.0 * log10(max);
400
            max = av_clipf(max, 0, 1);
401
            max_draw = calc_max_draw(s, outlink, max);
402
403
            for (j = 0; j < s->h; j++) {
404
                uint8_t *dst = s->out->data[0] + (c * s->h + c * s->b + j) * s->out->linesize[0];
405
406
                for (k = 0; k < max_draw; k++) {
407
                    AV_WN32A(dst + k * 4, lut[k]);
408
                    if (k & step)
409
                        k += step;
410
                }
411
            }
412
413
            if (s->h >= 8 && s->draw_text) {
414
                const char *channel_name = av_get_channel_name(av_channel_layout_extract_channel(insamples->channel_layout, c));
415
                if (!channel_name)
416
                    continue;
417
                drawtext(s->out, 2, c * (s->h + s->b) + (s->h - 8) / 2, channel_name, 0);
418
            }
419
420
            if (s->draw_persistent_duration > 0.) {
421
                calc_persistent_max(s, max, c);
422
                max_draw = FFMAX(0, calc_max_draw(s, outlink, s->max_persistent[c]) - 1);
423
                draw_max_line(s, max_draw, c);
424
            }
425
        }
426
    }
427
428
    av_frame_free(&insamples);
429
    out = av_frame_clone(s->out);
430
    if (!out)
431
        return AVERROR(ENOMEM);
432
    av_frame_make_writable(out);
433
434
    /* draw volume level */
435
    for (c = 0; c < inlink->channels && s->h >= 8 && s->draw_volume; c++) {
436
        char buf[16];
437
438
        if (s->orientation) { /* vertical */
439
            snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
440
            drawtext(out, c * (s->h + s->b) + (s->h - 8) / 2, 2, buf, 1);
441
        } else { /* horizontal */
442
            snprintf(buf, sizeof(buf), "%.2f", s->values[c * VAR_VARS_NB + VAR_VOLUME]);
443
            drawtext(out, FFMAX(0, s->w - 8 * (int)strlen(buf)), c * (s->h + s->b) + (s->h - 8) / 2, buf, 0);
444
        }
445
    }
446
447
    return ff_filter_frame(outlink, out);
448
}
449
450
static int activate(AVFilterContext *ctx)
451
{
452
    AVFilterLink *inlink = ctx->inputs[0];
453
    AVFilterLink *outlink = ctx->outputs[0];
454
    ShowVolumeContext *s = ctx->priv;
455
    AVFrame *in = NULL;
456
    int ret;
457
458
    FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
459
460
    ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
461
    if (ret < 0)
462
        return ret;
463
    if (ret > 0)
464
        return filter_frame(inlink, in);
465
466
    FF_FILTER_FORWARD_STATUS(inlink, outlink);
467
    FF_FILTER_FORWARD_WANTED(outlink, inlink);
468
469
    return FFERROR_NOT_READY;
470
}
471
472
static av_cold void uninit(AVFilterContext *ctx)
473
{
474
    ShowVolumeContext *s = ctx->priv;
475
476
    av_frame_free(&s->out);
477
    av_expr_free(s->c_expr);
478
    av_freep(&s->values);
479
    av_freep(&s->color_lut);
480
    av_freep(&s->max);
481
}
482
483
static const AVFilterPad showvolume_inputs[] = {
484
    {
485
        .name         = "default",
486
        .type         = AVMEDIA_TYPE_AUDIO,
487
        .config_props = config_input,
488
    },
489
    { NULL }
490
};
491
492
static const AVFilterPad showvolume_outputs[] = {
493
    {
494
        .name         = "default",
495
        .type         = AVMEDIA_TYPE_VIDEO,
496
        .config_props = config_output,
497
    },
498
    { NULL }
499
};
500
501
AVFilter ff_avf_showvolume = {
502
    .name          = "showvolume",
503
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio volume to video output."),
504
    .init          = init,
505
    .activate      = activate,
506
    .uninit        = uninit,
507
    .query_formats = query_formats,
508
    .priv_size     = sizeof(ShowVolumeContext),
509
    .inputs        = showvolume_inputs,
510
    .outputs       = showvolume_outputs,
511
    .priv_class    = &showvolume_class,
512
};