These variables are shared between frame threads, but they are updated
post-setup_finished() if a EOB/EOS slice type occurs. Moving the EOB/EOS
slices to the next frame thread instance (by parsing them leading into
the next picture instead of trailing behind the last picture) effectively
prevents this race condition.
This fixes tsan failures on hevc-conformance-NoOutPrior_A_Qualcomm_1.
They may be available in hvcc style extradata.
Based on a patch by Hendrik Leppkes.
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: Aaron Levinson <alevinsn@aracnet.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Move it to hevc_ps as well. This is in preparation for a following patch.
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: Aaron Levinson <alevinsn@aracnet.com>
Signed-off-by: James Almer <jamrial@gmail.com>
Based on the H264 SEI implementation.
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Reviewed-by: Aaron Levinson <alevinsn@aracnet.com>
Signed-off-by: James Almer <jamrial@gmail.com>
* commit '86157e6db2':
hevc: decouple calling get_format() from exporting the SPS parameters
See 786032cad8 (which has been reverted
and replaced with Anton's version to reduce diffs between the two
projects).
Merged-by: Clément Bœsch <u@pkh.me>
Use ff_hevc_decode_extradata() instead, which correctly only tries
to decode parameter set NAL units and not any other NAL that may be
present in extradata.
Reviewed-by: nevcairiel
Signed-off-by: James Almer <jamrial@gmail.com>
Values from subsequent values are guaranteed to be identical (since
poc and nal_unit_type are checked to be the same between slices), so
this doesn't affect output in any way, but does resolve the remaining
reported race conditions (by tsan) in fate-hevc.
In practice, this fixes tsan warnings like this:
WARNING: ThreadSanitizer: data race (pid=25334)
Read of size 4 at 0x7d9c0001adcc by main thread (mutexes: write M1386):
#0 hevc_update_thread_context src/libavcodec/hevcdec.c:3310 (ffmpeg+0x000000b41c7c)
[..]
Previous write of size 4 at 0x7d9c0001adcc by thread T1 (mutexes: write M1383):
#0 hls_slice_header src/libavcodec/hevcdec.c:596 (ffmpeg+0x000000b43a22)
It should only be set after the decoder state has been fully initialized
for using that SPS.
Fixes possible invalid reads on get_format() failure.
CC: libav-stable@libav.org
This way they can be reused by other code without including the whole
decoder-specific hevcdec.h
Also, add the HEVC_ prefix to them, since similarly named values exist
for H.264 as well and are sometimes used in the same code.
