vf_copy.c 1.93 KB
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/*
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 * This file is part of Libav.
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 *
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 * Libav is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
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 * Libav is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
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 * License along with Libav; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/**
 * @file
 * copy video filter
 */

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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
    AVFilterLink *outlink = inlink->dst->outputs[0];
    AVFrame *out = ff_get_video_buffer(outlink, in->width, in->height);

    if (!out) {
        av_frame_free(&in);
        return AVERROR(ENOMEM);
    }
    av_frame_copy_props(out, in);
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    av_frame_copy(out, in);
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    av_frame_free(&in);
    return ff_filter_frame(outlink, out);
}

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static const AVFilterPad avfilter_vf_copy_inputs[] = {
    {
        .name             = "default",
        .type             = AVMEDIA_TYPE_VIDEO,
        .get_video_buffer = ff_null_get_video_buffer,
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        .filter_frame     = filter_frame,
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    },
    { NULL }
};

static const AVFilterPad avfilter_vf_copy_outputs[] = {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
    },
    { NULL }
};

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AVFilter ff_vf_copy = {
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    .name      = "copy",
    .description = NULL_IF_CONFIG_SMALL("Copy the input video unchanged to the output."),

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    .inputs    = avfilter_vf_copy_inputs,
    .outputs   = avfilter_vf_copy_outputs,
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};