libavfilter/vf_copy.c

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * Libav is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 /**
  20  * @file
  21  * copy video filter
  22  */
  23
  24 #include "libavutil/imgutils.h"
  25 #include "libavutil/internal.h"
  26 #include "avfilter.h"
  27 #include "internal.h"
  28 #include "video.h"
  29
  30 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
  31 {
  32     AVFilterLink *outlink = inlink->dst->outputs[0];
  33     AVFrame *out = ff_get_video_buffer(outlink, in->width, in->height);
  34
  35     if (!out) {
  36         av_frame_free(&in);
  37         return AVERROR(ENOMEM);
  38     }
  39     av_frame_copy_props(out, in);
  40     av_image_copy(out->data, out->linesize, in->data, in->linesize,
  41                   in->format, in->width, in->height);
  42
  43     av_frame_free(&in);
  44     return ff_filter_frame(outlink, out);
  45 }
  46
  47 static const AVFilterPad avfilter_vf_copy_inputs[] = {
  48     {
  49         .name             = "default",
  50         .type             = AVMEDIA_TYPE_VIDEO,
  51         .get_video_buffer = ff_null_get_video_buffer,
  52         .filter_frame     = filter_frame,
  53     },
  54     { NULL }
  55 };
  56
  57 static const AVFilterPad avfilter_vf_copy_outputs[] = {
  58     {
  59         .name = "default",
  60         .type = AVMEDIA_TYPE_VIDEO,
  61     },
  62     { NULL }
  63 };
  64
  65 AVFilter avfilter_vf_copy = {
  66     .name      = "copy",
  67     .description = NULL_IF_CONFIG_SMALL("Copy the input video unchanged to the output."),
  68
  69     .inputs    = avfilter_vf_copy_inputs,
  70     .outputs   = avfilter_vf_copy_outputs,
  71 };