Re: [FFmpeg-devel] [PATCH V2] libavcodec/qsvdec.c: using queue count to unref frame

["Xiang, Haihao" <haihao.xiang-at-intel.com@ffmpeg.org>]

On Fri, 2021-03-12 at 06:21 +0000, Xiang, Haihao wrote:
> On Fri, 2021-03-12 at 10:44 +0800, wenbin.chen@intel.com wrote:
> > From: "Chen,Wenbin" <wenbin.chen@intel.com>
> > 
> > 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@intel.com>
> > ---
> >  libavcodec/qsvdec.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git a/libavcodec/qsvdec.c b/libavcodec/qsvdec.c
> > index 5f2e641373..3abd7bd4a2 100644
> > --- a/libavcodec/qsvdec.c
> > +++ b/libavcodec/qsvdec.c
> > @@ -513,7 +513,7 @@ 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 {
> > @@ -526,7 +526,7 @@ 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 {
> 
> LGTM, thanks!

Applied, thx!

-Haihao

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