GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/avf_avectorscope.c Lines: 0 175 0.0 %
Date: 2020-08-14 10:39:37 Branches: 0 112 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2013 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 vectorscope 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/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 VectorScopeMode {
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    LISSAJOUS,
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    LISSAJOUS_XY,
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    POLAR,
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    MODE_NB,
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};
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enum VectorScopeDraw {
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    DOT,
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    LINE,
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    DRAW_NB,
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};
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enum VectorScopeScale {
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    LIN,
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    SQRT,
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    CBRT,
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    LOG,
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    SCALE_NB,
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};
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typedef struct AudioVectorScopeContext {
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    const AVClass *class;
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    AVFrame *outpicref;
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    int w, h;
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    int hw, hh;
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    int mode;
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    int draw;
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    int scale;
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    int contrast[4];
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    int fade[4];
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    double zoom;
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    int swap;
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    int mirror;
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    unsigned prev_x, prev_y;
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    AVRational frame_rate;
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    int nb_samples;
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} AudioVectorScopeContext;
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#define OFFSET(x) offsetof(AudioVectorScopeContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption avectorscope_options[] = {
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    { "mode", "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
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    { "m",    "set mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=LISSAJOUS}, 0, MODE_NB-1, FLAGS, "mode" },
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    { "lissajous",    "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS},    0, 0, FLAGS, "mode" },
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    { "lissajous_xy", "", 0, AV_OPT_TYPE_CONST, {.i64=LISSAJOUS_XY}, 0, 0, FLAGS, "mode" },
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    { "polar",        "", 0, AV_OPT_TYPE_CONST, {.i64=POLAR},        0, 0, FLAGS, "mode" },
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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="400x400"}, 0, 0, FLAGS },
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    { "s",    "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str="400x400"}, 0, 0, FLAGS },
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    { "rc", "set red contrast",   OFFSET(contrast[0]), AV_OPT_TYPE_INT, {.i64=40},  0, 255, FLAGS },
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    { "gc", "set green contrast", OFFSET(contrast[1]), AV_OPT_TYPE_INT, {.i64=160}, 0, 255, FLAGS },
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    { "bc", "set blue contrast",  OFFSET(contrast[2]), AV_OPT_TYPE_INT, {.i64=80},  0, 255, FLAGS },
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    { "ac", "set alpha contrast", OFFSET(contrast[3]), AV_OPT_TYPE_INT, {.i64=255}, 0, 255, FLAGS },
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    { "rf", "set red fade",       OFFSET(fade[0]), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, FLAGS },
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    { "gf", "set green fade",     OFFSET(fade[1]), AV_OPT_TYPE_INT, {.i64=10}, 0, 255, FLAGS },
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    { "bf", "set blue fade",      OFFSET(fade[2]), AV_OPT_TYPE_INT, {.i64=5},  0, 255, FLAGS },
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    { "af", "set alpha fade",     OFFSET(fade[3]), AV_OPT_TYPE_INT, {.i64=5},  0, 255, FLAGS },
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    { "zoom", "set zoom factor",  OFFSET(zoom), AV_OPT_TYPE_DOUBLE, {.dbl=1},  0, 10, FLAGS },
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    { "draw", "set draw mode", OFFSET(draw), AV_OPT_TYPE_INT, {.i64=DOT}, 0, DRAW_NB-1, FLAGS, "draw" },
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    { "dot",   "", 0, AV_OPT_TYPE_CONST, {.i64=DOT} , 0, 0, FLAGS, "draw" },
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    { "line",  "", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, "draw" },
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    { "scale", "set amplitude scale mode", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LIN}, 0, SCALE_NB-1, FLAGS, "scale" },
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    { "lin",   "linear",      0, AV_OPT_TYPE_CONST, {.i64=LIN},  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",  "cube root",   0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
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    { "log",   "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG},  0, 0, FLAGS, "scale" },
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    { "swap", "swap x axis with y axis", OFFSET(swap), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
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    { "mirror", "mirror axis", OFFSET(mirror), AV_OPT_TYPE_INT, {.i64=0}, 0, 3, FLAGS, "mirror" },
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    { "none",  "no mirror", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mirror" },
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    { "x",  "mirror x",     0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mirror" },
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    { "y",  "mirror y",     0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mirror" },
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    { "xy", "mirror both",  0, AV_OPT_TYPE_CONST, {.i64=3}, 0, 0, FLAGS, "mirror" },
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    { NULL }
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};
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AVFILTER_DEFINE_CLASS(avectorscope);
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static void draw_dot(AudioVectorScopeContext *s, unsigned x, unsigned y)
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{
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    const int linesize = s->outpicref->linesize[0];
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    uint8_t *dst;
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    if (s->zoom > 1) {
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        if (y >= s->h || x >= s->w)
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            return;
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    } else {
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        y = FFMIN(y, s->h - 1);
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        x = FFMIN(x, s->w - 1);
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    }
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    dst = &s->outpicref->data[0][y * linesize + x * 4];
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    dst[0] = FFMIN(dst[0] + s->contrast[0], 255);
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    dst[1] = FFMIN(dst[1] + s->contrast[1], 255);
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    dst[2] = FFMIN(dst[2] + s->contrast[2], 255);
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    dst[3] = FFMIN(dst[3] + s->contrast[3], 255);
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}
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static void draw_line(AudioVectorScopeContext *s, int x0, int y0, int x1, int y1)
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{
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    int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1;
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    int dy = FFABS(y1-y0), sy = y0 < y1 ? 1 : -1;
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    int err = (dx>dy ? dx : -dy) / 2, e2;
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    for (;;) {
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        draw_dot(s, x0, y0);
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        if (x0 == x1 && y0 == y1)
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            break;
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        e2 = err;
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        if (e2 >-dx) {
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            err -= dy;
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            x0 += sx;
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        }
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        if (e2 < dy) {
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            err += dx;
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            y0 += sy;
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        }
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    }
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}
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static void fade(AudioVectorScopeContext *s)
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{
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    const int linesize = s->outpicref->linesize[0];
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    int i, j;
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    if (s->fade[0] || s->fade[1] || s->fade[2]) {
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        uint8_t *d = s->outpicref->data[0];
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        for (i = 0; i < s->h; i++) {
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            for (j = 0; j < s->w*4; j+=4) {
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                d[j+0] = FFMAX(d[j+0] - s->fade[0], 0);
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                d[j+1] = FFMAX(d[j+1] - s->fade[1], 0);
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                d[j+2] = FFMAX(d[j+2] - s->fade[2], 0);
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                d[j+3] = FFMAX(d[j+3] - s->fade[3], 0);
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            }
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            d += linesize;
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        }
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    }
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}
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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 *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_S16, 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_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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        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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        return ret;
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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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    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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    AudioVectorScopeContext *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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    return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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    AudioVectorScopeContext *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->prev_x = s->hw = s->w / 2;
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    s->prev_y = s->hh = s->mode == POLAR ? s->h - 1 : s->h / 2;
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    return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
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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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    AudioVectorScopeContext *s = ctx->priv;
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    const int hw = s->hw;
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    const int hh = s->hh;
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    AVFrame *clone;
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    unsigned x, y;
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    unsigned prev_x = s->prev_x, prev_y = s->prev_y;
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    double zoom = s->zoom;
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    int i;
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    if (!s->outpicref || s->outpicref->width  != outlink->w ||
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                         s->outpicref->height != outlink->h) {
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        av_frame_free(&s->outpicref);
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        s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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        if (!s->outpicref) {
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            av_frame_free(&insamples);
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            return AVERROR(ENOMEM);
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        }
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        s->outpicref->sample_aspect_ratio = (AVRational){1,1};
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        for (i = 0; i < outlink->h; i++)
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            memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w * 4);
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    }
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    s->outpicref->pts = insamples->pts;
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    fade(s);
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    if (zoom < 1) {
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        float max = 0;
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        switch (insamples->format) {
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        case AV_SAMPLE_FMT_S16: {
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            int16_t *samples = (int16_t *)insamples->data[0];
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            for (i = 0; i < insamples->nb_samples * 2; i++) {
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                float sample = samples[i] / (float)INT16_MAX;
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                max = FFMAX(FFABS(sample), max);
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            }
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            }
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            break;
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        case AV_SAMPLE_FMT_FLT: {
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            float *samples = (float *)insamples->data[0];
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            for (i = 0; i < insamples->nb_samples * 2; i++) {
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                max = FFMAX(FFABS(samples[i]), max);
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            }
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            }
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            break;
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        default:
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            av_assert2(0);
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        }
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        zoom = 1. / max;
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    }
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    for (i = 0; i < insamples->nb_samples; i++) {
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        int16_t *samples = (int16_t *)insamples->data[0] + i * 2;
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        float *samplesf = (float *)insamples->data[0] + i * 2;
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        float src[2];
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        switch (insamples->format) {
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        case AV_SAMPLE_FMT_S16:
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            src[0] = samples[0] / (float)INT16_MAX;
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            src[1] = samples[1] / (float)INT16_MAX;
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            break;
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        case AV_SAMPLE_FMT_FLT:
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            src[0] = samplesf[0];
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            src[1] = samplesf[1];
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            break;
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        default:
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            av_assert2(0);
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        }
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        switch (s->scale) {
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        case SQRT:
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            src[0] = FFSIGN(src[0]) * sqrtf(FFABS(src[0]));
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            src[1] = FFSIGN(src[1]) * sqrtf(FFABS(src[1]));
315
            break;
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        case CBRT:
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            src[0] = FFSIGN(src[0]) * cbrtf(FFABS(src[0]));
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            src[1] = FFSIGN(src[1]) * cbrtf(FFABS(src[1]));
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            break;
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        case LOG:
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            src[0] = FFSIGN(src[0]) * logf(1 + FFABS(src[0])) / logf(2);
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            src[1] = FFSIGN(src[1]) * logf(1 + FFABS(src[1])) / logf(2);
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            break;
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        }
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        if (s->mirror & 1)
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            src[0] = -src[0];
328
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        if (s->mirror & 2)
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            src[1] = -src[1];
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        if (s->swap)
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            FFSWAP(float, src[0], src[1]);
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        if (s->mode == LISSAJOUS) {
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            x = ((src[1] - src[0]) * zoom / 2 + 1) * hw;
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            y = (1.0 - (src[0] + src[1]) * zoom / 2) * hh;
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        } else if (s->mode == LISSAJOUS_XY) {
339
            x = (src[1] * zoom + 1) * hw;
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            y = (src[0] * zoom + 1) * hh;
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        } else {
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            float sx, sy, cx, cy;
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            sx = src[1] * zoom;
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            sy = src[0] * zoom;
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            cx = sx * sqrtf(1 - 0.5 * sy * sy);
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            cy = sy * sqrtf(1 - 0.5 * sx * sx);
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            x = hw + hw * FFSIGN(cx + cy) * (cx - cy) * .7;
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            y = s->h - s->h * fabsf(cx + cy) * .7;
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        }
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        if (s->draw == DOT) {
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            draw_dot(s, x, y);
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        } else {
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            draw_line(s, x, y, prev_x, prev_y);
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        }
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        prev_x = x;
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        prev_y = y;
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    }
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    s->prev_x = x, s->prev_y = y;
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    av_frame_free(&insamples);
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    clone = av_frame_clone(s->outpicref);
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    if (!clone)
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        return AVERROR(ENOMEM);
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    return ff_filter_frame(outlink, clone);
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}
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static int activate(AVFilterContext *ctx)
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{
373
    AVFilterLink *inlink = ctx->inputs[0];
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    AVFilterLink *outlink = ctx->outputs[0];
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    AudioVectorScopeContext *s = ctx->priv;
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    AVFrame *in;
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    int ret;
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    FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
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    ret = ff_inlink_consume_samples(inlink, s->nb_samples, s->nb_samples, &in);
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    if (ret < 0)
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        return ret;
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    if (ret > 0)
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        return filter_frame(inlink, in);
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    FF_FILTER_FORWARD_STATUS(inlink, outlink);
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    FF_FILTER_FORWARD_WANTED(outlink, inlink);
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    return FFERROR_NOT_READY;
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}
392
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static av_cold void uninit(AVFilterContext *ctx)
394
{
395
    AudioVectorScopeContext *s = ctx->priv;
396
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    av_frame_free(&s->outpicref);
398
}
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static const AVFilterPad audiovectorscope_inputs[] = {
401
    {
402
        .name         = "default",
403
        .type         = AVMEDIA_TYPE_AUDIO,
404
        .config_props = config_input,
405
    },
406
    { NULL }
407
};
408
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static const AVFilterPad audiovectorscope_outputs[] = {
410
    {
411
        .name         = "default",
412
        .type         = AVMEDIA_TYPE_VIDEO,
413
        .config_props = config_output,
414
    },
415
    { NULL }
416
};
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AVFilter ff_avf_avectorscope = {
419
    .name          = "avectorscope",
420
    .description   = NULL_IF_CONFIG_SMALL("Convert input audio to vectorscope video output."),
421
    .uninit        = uninit,
422
    .query_formats = query_formats,
423
    .priv_size     = sizeof(AudioVectorScopeContext),
424
    .activate      = activate,
425
    .inputs        = audiovectorscope_inputs,
426
    .outputs       = audiovectorscope_outputs,
427
    .priv_class    = &avectorscope_class,
428
};