GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/vf_bitplanenoise.c Lines: 0 74 0.0 %
Date: 2020-10-23 17:01:47 Branches: 0 66 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2016 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/opt.h"
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#include "libavutil/imgutils.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct BPNContext {
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    const AVClass *class;
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    int bitplane;
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    int filter;
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    int nb_planes;
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    int planeheight[4];
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    int planewidth[4];
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    int depth;
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} BPNContext;
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#define OFFSET(x) offsetof(BPNContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption bitplanenoise_options[] = {
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    { "bitplane", "set bit plane to use for measuring noise",  OFFSET(bitplane), AV_OPT_TYPE_INT,  {.i64=1}, 1, 16, FLAGS},
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    { "filter",   "show noisy pixels",                         OFFSET(filter),   AV_OPT_TYPE_BOOL, {.i64=0}, 0,  1, FLAGS},
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    { NULL }
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};
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AVFILTER_DEFINE_CLASS(bitplanenoise);
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static int query_formats(AVFilterContext *ctx)
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{
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    static const enum AVPixelFormat pixfmts[] = {
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        AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P,
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        AV_PIX_FMT_YUV440P,
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        AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ411P,
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        AV_PIX_FMT_YUVJ440P,
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        AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV420P9,
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        AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV420P10,
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        AV_PIX_FMT_YUV440P10,
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        AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
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        AV_PIX_FMT_YUV440P12,
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        AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
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        AV_PIX_FMT_YUV444P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV420P16,
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        AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
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        AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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        AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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        AV_PIX_FMT_NONE
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    };
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    AVFilterFormats *formats = ff_make_format_list(pixfmts);
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    if (!formats)
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        return AVERROR(ENOMEM);
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    return ff_set_common_formats(ctx, formats);
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}
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static int config_input(AVFilterLink *inlink)
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{
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    const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
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    AVFilterContext *ctx = inlink->dst;
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    BPNContext *s = ctx->priv;
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    s->nb_planes = desc->nb_components;
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    s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
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    s->planeheight[0] = s->planeheight[3] = inlink->h;
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    s->planewidth[1]  = s->planewidth[2]  = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
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    s->planewidth[0]  = s->planewidth[3]  = inlink->w;
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    s->depth = desc->comp[0].depth;
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    return 0;
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}
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#define CHECK_BIT(x, a, b, c) { \
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    bit = (((val[(x)] & mask) == (val[(x) + (a)] & mask)) + \
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           ((val[(x)] & mask) == (val[(x) + (b)] & mask)) + \
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           ((val[(x)] & mask) == (val[(x) + (c)] & mask))) > 1; \
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    if (dst) \
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        dst[(x)] = factor * bit; \
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    stats[plane] += bit; }
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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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    BPNContext *s = ctx->priv;
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    const int mask = (1 << (s->bitplane - 1));
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    const int factor = (1 << s->depth) - 1;
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    float stats[4] = { 0 };
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    char metabuf[128];
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    int plane, y, x, bit;
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    AVFrame *out = s->filter ? NULL : in;
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    if (!out) {
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        out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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        if (!out) {
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            av_frame_free(&in);
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            return AVERROR(ENOMEM);
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        }
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        av_frame_copy_props(out, in);
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    }
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    if (s->depth <= 8) {
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        for (plane = 0; plane < s->nb_planes; plane++) {
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            const int linesize = s->planeheight[plane] > 1 ? in->linesize[plane] : 0;
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            const int dlinesize = out->linesize[plane];
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            uint8_t *val = in->data[plane];
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            uint8_t *dst = s->filter ? out->data[plane]: NULL;
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            for (y = 0; y < s->planeheight[plane] - 1; y++) {
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                CHECK_BIT(0, 1, 1 + linesize, linesize)
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                for (x = 1; x < s->planewidth[plane] - 1; x++) {
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                    CHECK_BIT(x, -1, 1, linesize)
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                }
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                CHECK_BIT(x, -1, -1 + linesize, linesize)
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                val += linesize;
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                if (dst)
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                    dst += dlinesize;
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            }
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            CHECK_BIT(0, 1, 1 - linesize, -linesize)
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            for (x = 1; x < s->planewidth[plane] - 1; x++) {
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                CHECK_BIT(x, -1, 1, -linesize)
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            }
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            CHECK_BIT(x, -1, -1 - linesize, -linesize)
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        }
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    } else {
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        for (plane = 0; plane < s->nb_planes; plane++) {
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            const int linesize = s->planeheight[plane] > 1 ? in->linesize[plane] / 2 : 0;
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            const int dlinesize = out->linesize[plane] / 2;
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            uint16_t *val = (uint16_t *)in->data[plane];
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            uint16_t *dst = s->filter ? (uint16_t *)out->data[plane] : NULL;
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            val = (uint16_t *)in->data[plane];
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            for (y = 0; y < s->planeheight[plane] - 1; y++) {
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                CHECK_BIT(0, 1, 1 + linesize, linesize)
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                for (x = 1; x < s->planewidth[plane] - 1; x++) {
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                    CHECK_BIT(x, -1, 1, linesize)
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                }
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                CHECK_BIT(x, -1, -1 + linesize, linesize)
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                val += linesize;
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                if (dst)
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                    dst += dlinesize;
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            }
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            CHECK_BIT(0, 1, 1 - linesize, -linesize)
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            for (x = 1; x < s->planewidth[plane] - 1; x++) {
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                CHECK_BIT(x, -1, 1, -linesize)
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            }
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            CHECK_BIT(x, -1, -1 -linesize, -linesize)
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        }
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    }
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    for (plane = 0; plane < s->nb_planes; plane++) {
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        char key[32];
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        stats[plane] /= s->planewidth[plane] * s->planeheight[plane];
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        snprintf(key, sizeof(key), "lavfi.bitplanenoise.%d.%d", plane, s->bitplane);
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        snprintf(metabuf, sizeof(metabuf), "%f", 1. - 2.* fabs((stats[plane] - 0.5)));
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        av_dict_set(&out->metadata, key, metabuf, 0);
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    }
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    if (out != in)
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        av_frame_free(&in);
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    return ff_filter_frame(outlink, out);
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}
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static const AVFilterPad inputs[] = {
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    {
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        .name           = "default",
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        .type           = AVMEDIA_TYPE_VIDEO,
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        .filter_frame   = filter_frame,
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        .config_props   = config_input,
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    },
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    { NULL }
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};
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static const AVFilterPad outputs[] = {
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    {
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        .name = "default",
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        .type = AVMEDIA_TYPE_VIDEO,
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    },
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    { NULL }
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};
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AVFilter ff_vf_bitplanenoise = {
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    .name           = "bitplanenoise",
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    .description    = NULL_IF_CONFIG_SMALL("Measure bit plane noise."),
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    .priv_size      = sizeof(BPNContext),
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    .query_formats  = query_formats,
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    .inputs         = inputs,
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    .outputs        = outputs,
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    .priv_class     = &bitplanenoise_class,
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    .flags          = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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};