int av_buffersink_get_buffer_ref(AVFilterContext *buffer_sink,
AVFilterBufferRef **bufref, int flags);
+
+/**
+ * Get the number of immediately available frames.
+ */
+int av_buffersink_poll_frame(AVFilterContext *ctx);
+
#if FF_API_OLD_VSINK_API
/**
* @deprecated Use av_buffersink_get_buffer_ref() instead.