lavc/qsvdec: flush buffered data before reinit

Flush the buffered data in libmfx before video param reinit
in case the frames drop.

Cache the first frame causing the reinit and decode zero-size
pkt to flush the buffered pkt before reinit. After all the
buffered pkts being flushed, resume to reinit and decode.

Fix the issue in ticket #7399.

[V2]: Move the definition of zero_pkt to where it is exactly
used.

Signed-off-by: Linjie Fu <linjie.fu@intel.com>
Signed-off-by: Zhong Li <zhong.li@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libavcodec/qsvdec.h b/libavcodec/qsvdec.h
index 5b7b03a48b..111536caba 100644
--- a/libavcodec/qsvdec.h
+++ b/libavcodec/qsvdec.h
@@ -53,6 +53,8 @@ typedef struct QSVContext {
 
     AVFifoBuffer *async_fifo;
     int zero_consume_run;
+    int buffered_count;
+    int reinit_flag;
 
     // the internal parser and codec context for parsing the data
     AVCodecParserContext *parser;