h264: check that DPB is allocated before accessing it in flush_dpb()

555000c7 · Anton Khirnov · d0a863ac · 555000c7
Commit 555000c7 authored Mar 10, 2013 by Anton Khirnov
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h264.c libavcodec/h264.c +3 -2

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--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -2623,8 +2623,9 @@ static void flush_dpb(AVCodecContext *avctx)

    flush_change(h);

-    for (i = 0; i < MAX_PICTURE_COUNT; i++)
-        unref_picture(h, &h->DPB[i]);
+    if (h->DPB)
+        for (i = 0; i < MAX_PICTURE_COUNT; i++)
+            unref_picture(h, &h->DPB[i]);
    h->cur_pic_ptr = NULL;
    unref_picture(h, &h->cur_pic);