Make avfilter_graph_free() free not only the internal structures, but also the allocated graph, and set the graph pointer to NULL for increased safety. Simplify usage.
Showing the changes to libavfilter/avfiltergraph.c (1 of 4 files). Show all
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| @@ -32,14 +32,15 @@ AVFilterGraph *avfilter_graph_alloc(void) · 31 unmodified lines | ||
| 32 | 32 | return av_mallocz(sizeof(AVFilterGraph)); |
| 33 | 33 | } |
| 34 | 34 | |
| 35 | −void avfilter_graph_free(AVFilterGraph *graph) | |
| 35 | +void avfilter_graph_free(AVFilterGraph **graph) | |
| 36 | 36 | { |
| 37 | − if (!graph) | |
| 37 | + if (!*graph) | |
| 38 | 38 | return; |
| 39 | − for (; graph->filter_count > 0; graph->filter_count --) | |
| 40 | − avfilter_free(graph->filters[graph->filter_count - 1]); | |
| 41 | − av_freep(&graph->scale_sws_opts); | |
| 42 | − av_freep(&graph->filters); | |
| 39 | + for (; (*graph)->filter_count > 0; (*graph)->filter_count--) | |
| 40 | + avfilter_free((*graph)->filters[(*graph)->filter_count - 1]); | |
| 41 | + av_freep(&(*graph)->scale_sws_opts); | |
| 42 | + av_freep(&(*graph)->filters); | |
| 43 | + av_freep(graph); | |
| 43 | 44 | } |
| 44 | 45 | |
| 45 | 46 | int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) |