qsv: Skip the packet if decoding failure

MediaSDK may fail to decode some frame, just skip it.
Otherwise, it will keep decoding the failure packet repeatedly
without processing any packet afterwards.

Signed-off-by: Ruiling Song <ruiling.song@intel.com>
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

diff --git a/libavcodec/qsvdec_h2645.c b/libavcodec/qsvdec_h2645.c
index 83880dc085e2cfd55cad63f8ea1ab372013eebc1..78a7b613f9ae1fc5192becfb4845f7e694b06573 100644 (file)
--- a/libavcodec/qsvdec_h2645.c
+++ b/libavcodec/qsvdec_h2645.c
@@ -153,8 +153,12 @@ static int qsv_decode_frame(AVCodecContext *avctx, void *data,
         }
 
         ret = ff_qsv_process_data(avctx, &s->qsv, frame, got_frame, &s->buffer_pkt);
-        if (ret < 0)
+        if (ret < 0){
+            /* Drop buffer_pkt when failed to decode the packet. Otherwise,
+               the decoder will keep decoding the failure packet. */
+            av_packet_unref(&s->buffer_pkt);
             return ret;
+        }
 
         s->buffer_pkt.size -= ret;
         s->buffer_pkt.data += ret;