On Sat, Mar 18, 2017 at 09:56:04AM +0100, wm4 wrote: > From: Anton Khirnov <an...@khirnov.net> > > Certain hardware decoding APIs are not guaranteed to be thread-safe, so > having the user access decoded hardware surfaces while the decoder is > running in another thread can cause failures (this is mainly known to > happen with DXVA2). > > For such hwaccels, only allow the decoding thread to run while the user > is inside a lavc decode call (avcodec_send_packet/receive_frame). > > Merges Libav commit d4a91e65. > > Signed-off-by: wm4 <nfx...@googlemail.com> > --- > libavcodec/avcodec.h | 5 +++++ > libavcodec/hwaccel.h | 24 +++++++++++++++++++++ > libavcodec/pthread_frame.c | 52 > ++++++++++++++++++++++++++++++++++++++++------ > libavcodec/vaapi_h264.c | 2 ++ > libavcodec/vaapi_mpeg2.c | 2 ++ > libavcodec/vaapi_mpeg4.c | 3 +++ > libavcodec/vaapi_vc1.c | 3 +++ > libavcodec/vdpau_h264.c | 2 ++ > libavcodec/vdpau_hevc.c | 2 ++ > libavcodec/vdpau_mpeg12.c | 3 +++ > libavcodec/vdpau_mpeg4.c | 2 ++ > libavcodec/vdpau_vc1.c | 3 +++ > libavcodec/version.h | 2 +- > 13 files changed, 98 insertions(+), 7 deletions(-) > create mode 100644 libavcodec/hwaccel.h
breaks: ./ffmpeg -i tickets//4583/ffvp9_corruption.webm -f null - https://trac.ffmpeg.org/raw-attachment/ticket/4583/ffvp9_corruption.webm ... frame= 215 fps=0.0 q=-0.0 Lsize=N/A time=00:00:08.00 bitrate=N/A speed= 165x video:104kB audio:1500kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown pthread_mutex_unlock failed with error: Operation not permitted Aborted [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB If you drop bombs on a foreign country and kill a hundred thousand innocent people, expect your government to call the consequence "unprovoked inhuman terrorist attacks" and use it to justify dropping more bombs and killing more people. The technology changed, the idea is old.
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