libavfilter/vf_split.c

   1 /*
   2  * Copyright (c) 2007 Bobby Bingham
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file
  23  * Video splitter
  24  */
  25
  26 #include "avfilter.h"
  27
  28 static void start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
  29 {
  30     avfilter_start_frame(inlink->dst->outputs[0],
  31                          avfilter_ref_buffer(picref, ~AV_PERM_WRITE));
  32     avfilter_start_frame(inlink->dst->outputs[1],
  33                          avfilter_ref_buffer(picref, ~AV_PERM_WRITE));
  34 }
  35
  36 static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
  37 {
  38     avfilter_draw_slice(inlink->dst->outputs[0], y, h, slice_dir);
  39     avfilter_draw_slice(inlink->dst->outputs[1], y, h, slice_dir);
  40 }
  41
  42 static void end_frame(AVFilterLink *inlink)
  43 {
  44     avfilter_end_frame(inlink->dst->outputs[0]);
  45     avfilter_end_frame(inlink->dst->outputs[1]);
  46
  47     avfilter_unref_buffer(inlink->cur_buf);
  48 }
  49
  50 AVFilter avfilter_vf_split = {
  51     .name      = "split",
  52     .description = NULL_IF_CONFIG_SMALL("Pass on the input to two outputs."),
  53
  54     .inputs    = (AVFilterPad[]) {{ .name            = "default",
  55                                     .type            = AVMEDIA_TYPE_VIDEO,
  56                                     .get_video_buffer= avfilter_null_get_video_buffer,
  57                                     .start_frame     = start_frame,
  58                                     .draw_slice      = draw_slice,
  59                                     .end_frame       = end_frame, },
  60                                   { .name = NULL}},
  61     .outputs   = (AVFilterPad[]) {{ .name            = "output1",
  62                                     .type            = AVMEDIA_TYPE_VIDEO, },
  63                                   { .name            = "output2",
  64                                     .type            = AVMEDIA_TYPE_VIDEO, },
  65                                   { .name = NULL}},
  66 };