Move destruction of the graph's filters to its own helper function.
[ffmpeg.git] / libavfilter / avfiltergraph.c
1 /*
2  * Filter graphs
3  * copyright (c) 2007 Bobby Bingham
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 #include "avfilter.h"
23 #include "avfiltergraph.h"
24
25 struct AVFilterGraph {
26     unsigned filter_count;
27     AVFilterContext **filters;
28 };
29
30 AVFilterGraph *avfilter_create_graph(void)
31 {
32     return av_mallocz(sizeof(AVFilterGraph));
33 }
34
35 static void destroy_graph_filters(AVFilterGraph *graph)
36 {
37     unsigned i;
38
39     for(i = 0; i < graph->filter_count; i ++)
40         avfilter_destroy(graph->filters[i]);
41     av_freep(&graph->filters);
42 }
43
44 void avfilter_destroy_graph(AVFilterGraph *graph)
45 {
46     destroy_graph_filters(graph);
47     av_free(graph);
48 }
49
50 void avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
51 {
52     graph->filters = av_realloc(graph->filters,
53                                 sizeof(AVFilterContext*) * ++graph->filter_count);
54     graph->filters[graph->filter_count - 1] = filter;
55 }
56