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authorRonald S. Bultje <rsbultje@gmail.com>2017-04-03 10:24:05 -0400
committerMichael Niedermayer <michael@niedermayer.cc>2017-04-13 02:29:26 +0200
commitf4f3bf3c94a9aa485c09d0c03d68ca79a4785866 (patch)
tree91c033db9b6fd121b40c46cd0ef4a5b96cb01eda /libavcodec/ljpegenc.c
parent6557ea8e2bd768f5d82bce0fab28262437a292bf (diff)
downloadffmpeg-f4f3bf3c94a9aa485c09d0c03d68ca79a4785866.tar.gz
pthread_frame: allow per-field ThreadFrame owners.
This tries to handle cases where separate invocations of decode_frame() (each running in separate threads) write to respective fields in the same AVFrame->data[]. Having per-field owners makes interaction between readers (the referencing thread) and writers (the decoding thread) slightly more optimal if both accesses are field-based, since they will use the respective producer's thread objects (mutex/cond) instead of sharing the thread objects of the first field's producer. In practice, this fixes the following tsan-warning in fate-h264: WARNING: ThreadSanitizer: data race (pid=21615) Read of size 4 at 0x7d640000d9fc by thread T2 (mutexes: write M1006): #0 ff_thread_report_progress pthread_frame.c:569 (ffmpeg:x86_64+0x100f7cf54) [..] Previous write of size 4 at 0x7d640000d9fc by main thread (mutexes: write M1004): #0 update_context_from_user pthread_frame.c:335 (ffmpeg:x86_64+0x100f81abb) (cherry picked from commit 083300bea935d125b83f60d7030f78a7ffb0f3df) Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/ljpegenc.c')
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