[FFmpeg-cvslog] cavsdec: unref frame before referencing again

[Andreas Cadhalpun]

ffmpeg | branch: release/3.1 | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Thu Oct 20 22:14:22 2016 +0200| [72f1701c92f7f021d00c57f4f928efa719fcd53d] | committer: Andreas Cadhalpun

cavsdec: unref frame before referencing again

This fixes asserts (from commit 13aae8) in av_frame_ref and
av_frame_move_ref.

Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
(cherry picked from commit 1966ea012fd72abc8003e95dc3c8ad9e9f197913)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=72f1701c92f7f021d00c57f4f928efa719fcd53d
---

 libavcodec/cavsdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/cavsdec.c b/libavcodec/cavsdec.c
index 70ac6f8..fed7043 100644
--- a/libavcodec/cavsdec.c
+++ b/libavcodec/cavsdec.c
@@ -1217,6 +1217,8 @@ static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                 h->got_keyframe = 1;
             }
         case PIC_PB_START_CODE:
+            if (*got_frame)
+                av_frame_unref(data);
             *got_frame = 0;
             if (!h->got_keyframe)
                 break;