From e6b1c3bbe7082c71ea8ee8ac83698c156c9e4838 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Fri, 28 Dec 2012 09:54:29 +0100
Subject: pthread: make ff_thread_release_buffer idempotent.

I.e. don't do anything on already released frames.
---
 libavcodec/pthread.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'libavcodec/pthread.c')

diff --git a/libavcodec/pthread.c b/libavcodec/pthread.c
index 73d9da3f1c..cd44b8c73b 100644
--- a/libavcodec/pthread.c
+++ b/libavcodec/pthread.c
@@ -975,6 +975,9 @@ void ff_thread_release_buffer(AVCodecContext *avctx, AVFrame *f)
     PerThreadContext *p = avctx->thread_opaque;
     FrameThreadContext *fctx;
 
+    if (!f->data[0])
+        return;
+
     if (!(avctx->active_thread_type&FF_THREAD_FRAME)) {
         avctx->release_buffer(avctx, f);
         return;
-- 
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