[FFmpeg-cvslog] libavcodec/qsvdec.c: using queue count to unref frame

[Chen,Wenbin]

ffmpeg | branch: master | Chen,Wenbin <wenbin.chen at intel.com> | Fri Mar 12 10:44:06 2021 +0800| [e6b990e25d2b2f443faca10accc91e1e9b998e5a] | committer: Haihao Xiang

libavcodec/qsvdec.c: using queue count to unref frame

MSDK vc1 and av1 sometimes output frame into the same suface, but
ffmpeg-qsv assume the surface will be used only once, so it will
unref the frame when it receives the output surface. Now change
it to unref frame according to queue count.

Signed-off-by: Wenbin Chen <wenbin.chen at intel.com>
Signed-off-by: Haihao Xiang <haihao.xiang at intel.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e6b990e25d2b2f443faca10accc91e1e9b998e5a
---

 libavcodec/qsvdec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/qsvdec.c b/libavcodec/qsvdec.c
index 08370c8a0b..d9e0fef1f1 100644
--- a/libavcodec/qsvdec.c
+++ b/libavcodec/qsvdec.c
@@ -570,7 +570,7 @@ static int qsv_decode(AVCodecContext *avctx, QSVContext *q,
             return AVERROR_BUG;
         }
 
-        out_frame->queued = 1;
+        out_frame->queued += 1;
         av_fifo_generic_write(q->async_fifo, &out_frame, sizeof(out_frame), NULL);
         av_fifo_generic_write(q->async_fifo, &sync,      sizeof(sync),      NULL);
     } else {
@@ -583,7 +583,7 @@ static int qsv_decode(AVCodecContext *avctx, QSVContext *q,
 
         av_fifo_generic_read(q->async_fifo, &out_frame, sizeof(out_frame), NULL);
         av_fifo_generic_read(q->async_fifo, &sync,      sizeof(sync),      NULL);
-        out_frame->queued = 0;
+        out_frame->queued -= 1;
 
         if (avctx->pix_fmt != AV_PIX_FMT_QSV) {
             do {