[FFmpeg-devel] [PATCH] Make avfilter_unref_buffer() return immediately if ref is NULL.

[Stefano Sabatini]

---
 libavfilter/avfilter.c |    2 ++
 libavfilter/avfilter.h |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index db254d6..e2a3ac9 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -70,6 +70,8 @@ AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
 
 void avfilter_unref_buffer(AVFilterBufferRef *ref)
 {
+    if (!ref)
+        return;
     if (!(--ref->buf->refcount))
         ref->buf->free(ref->buf);
     av_free(ref->video);
diff --git a/libavfilter/avfilter.h b/libavfilter/avfilter.h
index 5d34bee..b675216 100644
--- a/libavfilter/avfilter.h
+++ b/libavfilter/avfilter.h
@@ -171,6 +171,7 @@ AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask);
 /**
  * Remove a reference to a buffer. If this is the last reference to the
  * buffer, the buffer itself is also automatically freed.
+ * If ref is NULL, do nothing.
  *
  * @param ref reference to the buffer
  */
-- 
1.7.2.3