Commit f8c77c82 authored by Vitor Sessak's avatar Vitor Sessak
Browse files

Move simple filter chain loading code over to the filter graph.

Commited in SoC by Bobby Bingham on 2007-07-14 22:26:37

Originally committed as revision 12688 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent ffcaef34
......@@ -19,6 +19,9 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <stddef.h>
#include "avfilter.h"
#include "avfiltergraph.h"
......@@ -54,3 +57,62 @@ void avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter)
graph->filters[graph->filter_count - 1] = filter;
}
static AVFilterContext *create_filter_with_args(char *filter)
{
AVFilterContext *ret;
char *name, *args;
name = filter;
if((args = strchr(filter, '='))) {
/* ensure we at least have a name */
if(args == filter)
return NULL;
*args ++ = 0;
}
av_log(NULL, AV_LOG_INFO, "creating filter \"%s\" with args \"%s\"\n",
name, args ? args : "(none)");
if((ret = avfilter_create_by_name(name, NULL))) {
if(avfilter_init_filter(ret, args)) {
av_log(NULL, AV_LOG_ERROR, "error initializing filter!\n");
avfilter_destroy(ret);
ret = NULL;
}
} else av_log(NULL, AV_LOG_ERROR, "error creating filter!\n");
return ret;
}
int avfilter_graph_load_chain(AVFilterGraph *graph,
unsigned count, char **filter_list,
AVFilterContext **first, AVFilterContext **last)
{
unsigned i;
AVFilterContext *filters[2] = {NULL,NULL};
for(i = 0; i < count; i ++) {
if(!(filters[1] = create_filter_with_args(filter_list[i])))
goto fail;
if(i == 0) {
if(first) *first = filters[1];
} else {
if(avfilter_link(filters[0], 0, filters[1], 0)) {
av_log(NULL, AV_LOG_ERROR, "error linking filters!\n");
goto fail;
}
}
avfilter_graph_add_filter(graph, filters[1]);
filters[0] = filters[1];
}
if(last) *last = filters[1];
return 0;
fail:
destroy_graph_filters(graph);
*first = *last = NULL;
return -1;
}
......@@ -44,4 +44,17 @@ void avfilter_destroy_graph(AVFilterGraph *graph);
*/
void avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter);
/**
* Loads the filter graph with a simple chain described by filters.
* @param graph The filter graph to load filters into
* @param count The number of filters to be created
* @param filters_list An array of strings describing the filters to be created.
* The format of each string is "name=params".
* @param first If non-NULL, will be set to the first filter in the chain.
* @param last If non-NULL, will be set to the last filter in the chain.
* @return 0 on success. -1 on error.
*/
int avfilter_graph_load_chain(AVFilterGraph *graph,
unsigned count, char **filter_list,
AVFilterContext **first, AVFilterContext **last);
#endif /* FFMPEG_AVFILTER_H */
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