pthread: make ff_thread_release_buffer idempotent.

I.e. don't do anything on already released frames.

pthread: make ff_thread_release_buffer idempotent.
I.e. don't do anything on already released frames.
e6b1c3bb · Anton Khirnov · 729b3714 · e6b1c3bb
Commit e6b1c3bb authored Dec 28, 2012 by Anton Khirnov
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libavcodec/pthread.c libavcodec/pthread.c +3 -0

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--- 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;