On Tue, Jul 17, 2018 at 12:00 AM Mark Thompson <s...@jkqxz.net> wrote:
> On 16/07/18 14:26, Maxym Dmytrychenko wrote: > > Not used VPP sessions, like for hwupload/hwdownload handling, > > can increase CPU utilization and this patch fixes it. > > thank you,Joe, for the contribution. > > > > Signed-off-by: Maxym Dmytrychenko <maxim....@gmail.com> > > --- > > libavutil/hwcontext_qsv.c | 35 ++++++++++++++++++++++++++--------- > > 1 file changed, 26 insertions(+), 9 deletions(-) > > This makes sense, but it looks like it might need some sort of 'once' > construction for thread-safety? > > I believe the current API intent is that performing simultaneous transfer > operations on different frames in the same frames context should be safe. > > good point! So far, I see pretty much always the same thread, so like single threaded usage, unless I am missing something. should we consider this implementation ok and to remember: if multithreading support - to be adjusted? > > > diff --git a/libavutil/hwcontext_qsv.c b/libavutil/hwcontext_qsv.c > > index b3eb4a3ea..3e6c38037 100644 > > --- a/libavutil/hwcontext_qsv.c > > +++ b/libavutil/hwcontext_qsv.c > > @@ -56,7 +56,9 @@ typedef struct QSVDeviceContext { > > > > typedef struct QSVFramesContext { > > mfxSession session_download; > > + int session_download_init; > > mfxSession session_upload; > > + int session_upload_init; > > > > AVBufferRef *child_frames_ref; > > mfxFrameSurface1 *surfaces_internal; > > @@ -146,13 +148,15 @@ static void qsv_frames_uninit(AVHWFramesContext > *ctx) > > MFXVideoVPP_Close(s->session_download); > > MFXClose(s->session_download); > > } > > - s->session_download = NULL; > > + s->session_download = NULL; > > + s->session_download_init = 0; > > > > if (s->session_upload) { > > MFXVideoVPP_Close(s->session_upload); > > MFXClose(s->session_upload); > > } > > - s->session_upload = NULL; > > + s->session_upload = NULL; > > + s->session_upload_init = 0; > > > > av_freep(&s->mem_ids); > > av_freep(&s->surface_ptrs); > > @@ -535,13 +539,10 @@ static int qsv_frames_init(AVHWFramesContext *ctx) > > s->mem_ids[i] = frames_hwctx->surfaces[i].Data.MemId; > > } > > > > - ret = qsv_init_internal_session(ctx, &s->session_download, 0); > > - if (ret < 0) > > - return ret; > > - > > - ret = qsv_init_internal_session(ctx, &s->session_upload, 1); > > - if (ret < 0) > > - return ret; > > + s->session_download = NULL; > > + s->session_upload = NULL; > > + s->session_download_init = 0; > > + s->session_upload_init = 0; > > > > return 0; > > } > > @@ -740,6 +741,14 @@ static int qsv_transfer_data_from(AVHWFramesContext > *ctx, AVFrame *dst, > > > > mfxSyncPoint sync = NULL; > > mfxStatus err; > > + int ret = -1; > > The initialisation is redundant? The -1 confused me, but I don't think > it's ever read anywhere. > > can change this, sure. > > + > > + if (!s->session_download_init) { > > + s->session_download_init = 1; > > + ret = qsv_init_internal_session(ctx, &s->session_download, 0); > > + if (ret < 0) > > + return ret; > > + } > > > > if (!s->session_download) { > > if (s->child_frames_ref) > > @@ -787,6 +796,14 @@ static int qsv_transfer_data_to(AVHWFramesContext > *ctx, AVFrame *dst, > > > > mfxSyncPoint sync = NULL; > > mfxStatus err; > > + int ret = -1; > Likewise this one. > > as above as well - can change. > > + > > + if (!s->session_upload_init) { > > + s->session_upload_init = 1; > > + ret = qsv_init_internal_session(ctx, &s->session_upload, 1); > > + if (ret < 0) > > + return ret; > > + } > > > > if (!s->session_upload) { > > if (s->child_frames_ref) > > > > Thanks, > > thank you for the review > - Mark > _______________________________________________ > libav-devel mailing list > libav-devel@libav.org > https://lists.libav.org/mailman/listinfo/libav-devel Max _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel