GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/avf_aphasemeter.c Lines: 65 130 50.0 %
Date: 2020-08-14 10:39:37 Branches: 25 76 32.9 %

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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/**
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 * @file
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 * audio to video multimedia aphasemeter filter
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 */
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#include "libavutil/avassert.h"
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#include "libavutil/channel_layout.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 "avfilter.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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typedef struct AudioPhaseMeterContext {
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    const AVClass *class;
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    AVFrame *out;
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    int do_video;
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    int w, h;
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    AVRational frame_rate;
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    int contrast[4];
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    uint8_t *mpc_str;
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    uint8_t mpc[4];
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    int draw_median_phase;
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} AudioPhaseMeterContext;
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#define OFFSET(x) offsetof(AudioPhaseMeterContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption aphasemeter_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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    { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
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    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="800x400"}, 0, 0, FLAGS },
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    { "rc", "set red contrast",   OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=2}, 0, 255, FLAGS },
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    { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=7}, 0, 255, FLAGS },
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    { "bc", "set blue contrast",  OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=1}, 0, 255, FLAGS },
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    { "mpc", "set median phase color", OFFSET(mpc_str), AV_OPT_TYPE_STRING, {.str = "none"}, 0, 0, FLAGS },
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    { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
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    { NULL }
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};
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AVFILTER_DEFINE_CLASS(aphasemeter);
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static int query_formats(AVFilterContext *ctx)
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{
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    AudioPhaseMeterContext *s = ctx->priv;
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    AVFilterFormats *formats = NULL;
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    AVFilterChannelLayouts *layout = 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_FLT, 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->out_formats        )) < 0 ||
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        (ret = ff_formats_ref         (formats, &outlink->in_formats        )) < 0 ||
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        (ret = ff_add_channel_layout  (&layout, AV_CH_LAYOUT_STEREO         )) < 0 ||
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        (ret = ff_channel_layouts_ref (layout , &inlink->out_channel_layouts)) < 0 ||
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        (ret = ff_channel_layouts_ref (layout , &outlink->in_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->out_samplerates)) < 0 ||
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        (ret = ff_formats_ref(formats, &outlink->in_samplerates)) < 0)
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        return ret;
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    if (s->do_video) {
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        AVFilterLink *outlink = ctx->outputs[1];
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        formats = ff_make_format_list(pix_fmts);
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        if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 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 config_input(AVFilterLink *inlink)
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{
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    AVFilterContext *ctx = inlink->dst;
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    AudioPhaseMeterContext *s = ctx->priv;
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    int nb_samples;
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    if (s->do_video) {
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        nb_samples = FFMAX(1, av_rescale(inlink->sample_rate, s->frame_rate.den, s->frame_rate.num));
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        inlink->partial_buf_size =
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        inlink->min_samples =
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        inlink->max_samples = nb_samples;
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    }
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    return 0;
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}
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static int config_video_output(AVFilterLink *outlink)
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{
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    AVFilterContext *ctx = outlink->src;
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    AudioPhaseMeterContext *s = ctx->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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    if (!strcmp(s->mpc_str, "none"))
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        s->draw_median_phase = 0;
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    else if (av_parse_color(s->mpc, s->mpc_str, -1, ctx) >= 0)
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        s->draw_median_phase = 1;
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    else
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        return AVERROR(EINVAL);
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    return 0;
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}
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static inline int get_x(float phase, int w)
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{
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  return (phase + 1.) / 2. * (w - 1);
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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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    AudioPhaseMeterContext *s = ctx->priv;
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    AVFilterLink *outlink = s->do_video ? ctx->outputs[1] : NULL;
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    AVFilterLink *aoutlink = ctx->outputs[0];
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    AVDictionary **metadata;
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    const int rc = s->contrast[0];
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    const int gc = s->contrast[1];
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    const int bc = s->contrast[2];
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    float fphase = 0;
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    AVFrame *out;
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    uint8_t *dst;
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    int i;
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    if (s->do_video && (!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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        out = s->out;
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        for (i = 0; i < outlink->h; i++)
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            memset(out->data[0] + i * out->linesize[0], 0, outlink->w * 4);
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    } else if (s->do_video) {
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        out = s->out;
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        for (i = outlink->h - 1; i >= 10; i--)
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            memmove(out->data[0] + (i  ) * out->linesize[0],
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                    out->data[0] + (i-1) * out->linesize[0],
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                    outlink->w * 4);
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        for (i = 0; i < outlink->w; i++)
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            AV_WL32(out->data[0] + i * 4, 0);
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    }
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    for (i = 0; i < in->nb_samples; i++) {
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        const float *src = (float *)in->data[0] + i * 2;
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        const float f = src[0] * src[1] / (src[0]*src[0] + src[1] * src[1]) * 2;
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        const float phase = isnan(f) ? 1 : f;
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        const int x = get_x(phase, s->w);
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        if (s->do_video) {
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            dst = out->data[0] + x * 4;
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            dst[0] = FFMIN(255, dst[0] + rc);
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            dst[1] = FFMIN(255, dst[1] + gc);
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            dst[2] = FFMIN(255, dst[2] + bc);
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            dst[3] = 255;
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        }
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        fphase += phase;
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    }
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    fphase /= in->nb_samples;
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    if (s->do_video) {
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        if (s->draw_median_phase) {
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            dst = out->data[0] + get_x(fphase, s->w) * 4;
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            AV_WL32(dst, AV_RL32(s->mpc));
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        }
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        for (i = 1; i < 10 && i < outlink->h; i++)
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            memcpy(out->data[0] + i * out->linesize[0], out->data[0], outlink->w * 4);
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    }
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    metadata = &in->metadata;
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    if (metadata) {
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        uint8_t value[128];
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        snprintf(value, sizeof(value), "%f", fphase);
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        av_dict_set(metadata, "lavfi.aphasemeter.phase", value, 0);
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    }
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    if (s->do_video) {
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        AVFrame *clone;
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        s->out->pts = in->pts;
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        clone = av_frame_clone(s->out);
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        if (!clone)
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            return AVERROR(ENOMEM);
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        ff_filter_frame(outlink, clone);
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    }
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    return ff_filter_frame(aoutlink, in);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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    AudioPhaseMeterContext *s = ctx->priv;
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    int i;
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    av_frame_free(&s->out);
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    for (i = 0; i < ctx->nb_outputs; i++)
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        av_freep(&ctx->output_pads[i].name);
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}
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static av_cold int init(AVFilterContext *ctx)
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{
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    AudioPhaseMeterContext *s = ctx->priv;
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    AVFilterPad pad;
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    int ret;
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    pad = (AVFilterPad){
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        .name         = av_strdup("out0"),
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        .type         = AVMEDIA_TYPE_AUDIO,
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    };
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    if (!pad.name)
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        return AVERROR(ENOMEM);
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    ret = ff_insert_outpad(ctx, 0, &pad);
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    if (ret < 0) {
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        av_freep(&pad.name);
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        return ret;
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    }
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    if (s->do_video) {
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        pad = (AVFilterPad){
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            .name         = av_strdup("out1"),
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            .type         = AVMEDIA_TYPE_VIDEO,
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            .config_props = config_video_output,
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        };
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        if (!pad.name)
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            return AVERROR(ENOMEM);
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        ret = ff_insert_outpad(ctx, 1, &pad);
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        if (ret < 0) {
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            av_freep(&pad.name);
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            return ret;
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        }
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    }
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    return 0;
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}
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static const AVFilterPad inputs[] = {
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    {
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        .name         = "default",
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        .type         = AVMEDIA_TYPE_AUDIO,
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        .config_props = config_input,
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        .filter_frame = filter_frame,
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    },
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    { NULL }
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};
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AVFilter ff_avf_aphasemeter = {
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    .name          = "aphasemeter",
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    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to phase meter video output."),
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    .init          = init,
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    .uninit        = uninit,
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    .query_formats = query_formats,
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    .priv_size     = sizeof(AudioPhaseMeterContext),
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    .inputs        = inputs,
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    .outputs       = NULL,
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    .priv_class    = &aphasemeter_class,
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    .flags         = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
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};