Split filter graphs out into their own source & header files.

Commited in SoC by Bobby Bingham on 2007-07-14 21:20:21

Originally committed as revision 12686 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavfilter/avfiltergraph.c

+/*
+ * Filter graphs
+ * copyright (c) 2007 Bobby Bingham
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * 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.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * 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
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avfilter.h"
+#include "avfiltergraph.h"
+
+struct AVFilterGraph {
+    unsigned filter_count;
+    AVFilterContext **filters;
+};
+
+AVFilterGraph *avfilter_create_graph(void)
+{
+    return av_mallocz(sizeof(AVFilterGraph));
+}
+
+void avfilter_destroy_graph(AVFilterGraph *graph)
+{
+    unsigned i;
+
+    for(i = 0; i < graph->filter_count; i ++)
+        avfilter_destroy(graph->filters[i]);
+    av_free(graph->filters);
+    av_free(graph);
+}
+
+void avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
+{
+    graph->filters = av_realloc(graph->filters,
+                                sizeof(AVFilterContext*) * ++graph->filter_count);
+    graph->filters[graph->filter_count - 1] = filter;
+}
+

libavfilter/avfiltergraph.h

+/*
+ * Filter graphs
+ * copyright (c) 2007 Bobby Bingham
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * 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.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * 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
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef FFMPEG_AVFILTER_GRAPH_H
+#define FFMPEG_AVFILTER_GRAPH_H
+
+#include "avfilter.h"
+
+typedef struct AVFilterGraph AVFilterGraph;
+
+/**
+ * Create a new filter graph
+ */
+AVFilterGraph *avfilter_create_graph(void);
+
+/**
+ * Destroy a filter graph, and any filters in it.
+ * @param graph The filter graph to destroy
+ */
+void avfilter_destroy_graph(AVFilterGraph *graph);
+
+/**
+ * Add an existing filter instance to a filter graph.
+ * @param graph  The filter graph
+ * @param filter The filter to be added
+ */
+void avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter);
+
+#endif  /* FFMPEG_AVFILTER_H */