The comments to the function say that it does not implement the spec and
instead follows VTM.
This patch is quite likely not the right solution and more intended to show
the issue to people knowing the specific part of VTM ...
Fixes: signed integer overflow: 2147483392 + 256 cannot be represented in type 'int'
Fixes: 60505/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6216675924770816
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes: out of array access
Fixes: 60949/clusterfuzz-testcase-minimized-ffmpeg_dem_EVC_fuzzer-5959738853294080
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
To support more reference frames from different directions.
Signed-off-by: Fei Wang <fei.w.wang@intel.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>
Turn tracing into callbacks for each syntax element, with default
callbacks to match current trace_headers behaviour for debug. Move
the construction of bit strings into the trace callback, which
simplifies all of the read and write functions.
Signed-off-by: Fei Wang <fei.w.wang@intel.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>
from the specification:
For each OLS, there shall be at least one layer that is an output layer. In other words, for any value of i in the range of 0
to TotalNumOlss − 1, inclusive, the value of NumOutputLayersInOls[ i ] shall be greater than or equal to 1
Fixes: index 257 out of bounds for type 'uint8_t [257]'
Fixes: 61160/clusterfuzz-testcase-minimized-ffmpeg_BSF_VVC_METADATA_fuzzer-6709397181825024
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Fixes: out of array access
Fixes: 62164/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DCA_fuzzer-6041088751960064
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
The AVFrame of a decoder with the ordinary decode callback
is generically unreferenced on error.
Reviewed-by: James Zern <jzern@google.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Keeping an ever growing list of CPUs just to pass -march to the compiler and
enable fast_cmov is a waste of time. Every CPU we know has limitations is
already handled here, so just fallback to enabling everything when a passed in
argument is not one of those.
This will enable optimizations for CPU architectures released in the past 7 or
so years with supported GCC and clang compilers when used as argument in
configure, instead of silently ignoring them.
Signed-off-by: James Almer <jamrial@gmail.com>
ISO C++ forbids compound-literals. It's not available with MSVC.
This is a known issue from 10 years ago, and that's why there is a
av_get_time_base_q().
Since we have no plan to remove AV_TIME_BASE_Q, just make it
available in C++.
There are multiple choices:
1. Use C++11 syntax: AVRational{1, AV_TIME_BASE}
Users may still use C++98 to write new code. So no.
2. Use av_get_time_base_q().
It's for this purpose. But it's not compile time constants as
AV_TIME_BASE_Q in C.
So I choose av_make_q() as Anton's suggestion.
https://libav-devel.libav.narkive.com/ZQCWfTun/patch-0-2-fix-avutil-h-usage-from-c
Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
It is badly named (should have been -top_field_first, or at least -tff),
underdocumented and underspecified, and (most importantly) entirely
redundant with the setfield filter.
Merge three blocks with slightly inconsistent checks into one, treating
encoder input as interlaced when either:
* at least one of ilme/ildct flags is set
* the first frame in the stream is marked as interlaced
* the user specified the -top option
Stop modifying the frame passed to enc_open().
It was added in cb114ed464 with the comment
"This will allow fixing several bugs with the -shortest option".
Since
* there is no explanation of what these bugs are
* libavformat is not the place to work around ffmpeg CLI bugs
* there is no indication that this feature is actually in use
deprecate it without replacement.
Avoid using the deprecated functions ssh_try_publickey_from_file among
others in favor of symbols introduced in libssh 0.6.0 (Jan 2014) and
update configure to require this version.
Signed-off-by: Leo Izen <leo.izen@gmail.com>
Since 432adca5fe no decoder
looks at the slice_count and slice_offset fields at all,
so there is no reason to synchronize them between the worker
and the user thread.
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
When decoding non-keyframes, the decoding process expects
there to be two reference frames, the last one and the golden
one. The existence of the golden one is checked and in case
it is there, it is presumed that the last one exists as well.
This assumption is wrong in case of memory allocation failure,
namely in case the call to ff_thread_ref_frame() that sets
the last frame fails.
Fix this by actually performing a shuffle without creating
new references. This can't fail and has the advantage of
fewer implicit allocations.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
When decoding a keyframe, last_frame and golden_frame are
not used at all and (at least when starting decoding)
are not set at all. But due to code sharing pointer arithmetic
on the NULL data-pointers of these frames has nevertheless
been performed. This is undefined behaviour and causes e.g.
"runtime error: applying non-zero offset 173440 to null pointer"
from UBSan in the vp31, vp4, theora-coeff-level64 and theora-offset
FATE-tests.
Fix this by reusing the current frame for unavailable frames.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
It does not use ThreadFrames at all, so thread.h is the correct place.
bcb0faeaba was wrong.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
The '<' in ///< says that the comment pertains to the previous item
on the same line as the ///<.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Michael Niedermayer
Paul B Mahol
Fei Wang
Mark Thompson
James Almer
Damiano Galassi
Zhao Zhili
Nuo Mi
Andreas Rheinhardt
Anton Khirnov
Leo Izen