[FFmpeg-devel] [PATCH v1 2/4] lavc/hevcdec: do not let missing ref frames invovled in dpb process
Michael Niedermayer
michael at niedermayer.cc
Tue Jun 7 15:06:52 EEST 2022
On Tue, Jun 07, 2022 at 03:08:28PM +0800, Fei Wang wrote:
> From: Xu Guangxin <guangxin.xu at intel.com>
>
> We will generate a new frame for a missed reference. The frame can only
> be used for reference. We assign an invalid decode sequence to it, so
> it will not be involved in any dpb process.
>
> Tested-by: Fei Wang <fei.w.wang at intel.com>
> Signed-off-by: Xu Guangxin <guangxin.xu at intel.com>
> ---
> libavcodec/hevc_refs.c | 13 ++++++++++++-
> libavcodec/hevcdec.c | 4 ++--
> libavcodec/hevcdec.h | 3 +++
> 3 files changed, 17 insertions(+), 3 deletions(-)
This causes segfaults
Thread 9 "ffmpeg_g" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fffcc5ad700 (LWP 14108)]
0x00005555564b88c0 in ff_emu_edge_vfix19_sse ()
(gdb) bt
#0 0x00005555564b88c0 in ff_emu_edge_vfix19_sse ()
#1 0x00005555561c515c in emulated_edge_mc_avx2 ()
#2 0x0000555555d21bc8 in hls_prediction_unit.isra ()
#3 0x0000555555d2420b in hls_coding_quadtree ()
#4 0x0000555555d2338d in hls_coding_quadtree ()
#5 0x0000555555d25371 in hls_decode_entry ()
#6 0x0000555555bd77e5 in avcodec_default_execute ()
#7 0x0000555555d2a00f in hevc_decode_frame ()
#8 0x0000555555edc5a3 in frame_worker_thread ()
#9 0x00007ffff75fc6db in start_thread (arg=0x7fffcc5ad700) at pthread_create.c:463
#10 0x00007fffed17061f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
I do not agree with what you have to say, but I'll defend to the death your
right to say it. -- Voltaire
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