On Wed, Nov 06, 2013 at 08:04:58PM +0100, Diego Biurrun wrote:
> --- /dev/null
> +++ b/libavfilter/api-example.c
> @@ -0,0 +1,324 @@
> +static int init_filter_graph(AVFormatContext *ic, AVStream *audio_st)
> +{
> + // create new graph
> + filter_graph = avfilter_graph_alloc();
> + if (!filter_graph) {
> + av_log(NULL, AV_LOG_ERROR,
> + "Unable to create filter graph: out of memory\n");
> + return -1;
> + }
> +
> + err = avfilter_graph_create_filter(&abuffer_ctx, abuffer,
> + NULL, strbuf, NULL, filter_graph);
> + if (err < 0) {
> + av_log(NULL, AV_LOG_ERROR, "error initializing abuffer filter\n");
> + return err;
> + }
> + err = avfilter_graph_create_filter(&volume_ctx, volume, NULL,
> + strbuf, NULL, filter_graph);
> + if (err < 0) {
> + av_log(NULL, AV_LOG_ERROR, "error initializing volume filter\n");
> + return err;
> + }
> + err = avfilter_graph_create_filter(&aformat_ctx, aformat,
> + NULL, strbuf, NULL, filter_graph);
> + if (err < 0) {
> + av_log(NULL, AV_LOG_ERROR, "unable to create aformat filter\n");
> + return err;
> + }
> + err = avfilter_graph_create_filter(&abuffersink_ctx, abuffersink,
> + NULL, NULL, NULL, filter_graph);
> + if (err < 0) {
> + av_log(NULL, AV_LOG_ERROR, "unable to create aformat filter\n");
> + return err;
> + }
> +
> + if (err >= 0)
> + err = avfilter_link(abuffer_ctx, 0, volume_ctx, 0);
> + if (err >= 0)
> + err = avfilter_link(volume_ctx, 0, aformat_ctx, 0);
> + if (err >= 0)
> + err = avfilter_link(aformat_ctx, 0, abuffersink_ctx, 0);
> + if (err < 0) {
> + av_log(NULL, AV_LOG_ERROR, "error connecting filters\n");
> + return err;
> + }
> + err = avfilter_graph_config(filter_graph, NULL);
> + if (err < 0) {
> + av_log(NULL, AV_LOG_ERROR, "error configuring the filter graph\n");
> + return err;
> + }
> + return 0;
> +}
Do we care about properly cleaning up the memory allocation on errors
in this example program?
Diego
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