lavfi: add FF_*LINK_IDX convenience macros.

cb6a20fa · Nicolas George · 461f506f · cb6a20fa
Commit cb6a20fa authored Jul 19, 2012 by Nicolas George
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internal.h libavfilter/internal.h +8 -0

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--- a/libavfilter/internal.h
+++ b/libavfilter/internal.h
@@ -350,4 +350,12 @@ int ff_request_frame(AVFilterLink *link);
 AVFilterBufferRef *ff_copy_buffer_ref(AVFilterLink *outlink,
                                      AVFilterBufferRef *ref);

+/**
+ * Find the index of a link.
+ *
+ * I.e. find i such that link == ctx->(in|out)puts[i]
+ */
+#define FF_INLINK_IDX(link)  ((int)((link)->dstpad - (link)->dst->input_pads))
+#define FF_OUTLINK_IDX(link) ((int)((link)->srcpad - (link)->src->output_pads))
+
 #endif /* AVFILTER_INTERNAL_H */