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avfilter: Add command passing support

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2011-08-28 20:46:31 +02:00
parent 4becc86139
commit 1e5014c7c7
4 changed files with 83 additions and 1 deletions
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30
libavfilter/avfiltergraph.c
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@ -253,3 +253,33 @@ int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx)
return 0;
}
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags)
{
int i, r = AVERROR(ENOSYS);
if(!graph)
return r;
if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) {
r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST);
if(r != AVERROR(ENOSYS))
return r;
}
if(res_len && res)
res[0]= 0;
for (i = 0; i < graph->filter_count; i++) {
AVFilterContext *filter = graph->filters[i];
if(!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name)){
r = avfilter_process_command(filter, cmd, arg, res, res_len, flags);
if(r != AVERROR(ENOSYS)) {
if((flags & AVFILTER_CMD_FLAG_ONE) || r<0)
return r;
}
}
}
return r;
}