vsrc_buffer: add flags param to av_vsrc_buffer_add_video_buffer_ref

The new flags parameter allows to specify if the video ref to add
should overwrite the cache, if the flag is not set vsrc_buffer will
complain and abort; otherwise it will clean the already cached video
ref before to overwrite it, thus avoiding a leak.

1 files changed, 10 insertions, 1 deletions

diff --git a/libavfilter/vsrc_buffer.h b/libavfilter/vsrc_buffer.h
index c717f3dae4..b661d414ea 100644
--- a/libavfilter/vsrc_buffer.h
+++ b/libavfilter/vsrc_buffer.h
@@ -29,12 +29,21 @@
 #include "avfilter.h"
 
 /**
+ * Tell av_vsrc_buffer_add_video_buffer_ref() to overwrite the already
+ * cached video buffer with the new added one, otherwise the function
+ * will complain and exit.
+ */
+#define AV_VSRC_BUF_FLAG_OVERWRITE 1
+
+/**
  * Add video buffer data in picref to buffer_src.
  *
  * @param buffer_src pointer to a buffer source context
+ * @param flags a combination of AV_VSRC_BUF_FLAG_* flags
  * @return >= 0 in case of success, a negative AVERROR code in case of
  * failure
  */
-int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_src, AVFilterBufferRef *picref);
+int av_vsrc_buffer_add_video_buffer_ref(AVFilterContext *buffer_src,
+                                        AVFilterBufferRef *picref, int flags);
 
 #endif /* AVFILTER_VSRC_BUFFER_H */