GB/T 17975.1
Information technology-Generic coding of moving pictures and associated audio
information-Part 1:Systems
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
GB/T 17975.1
Information technology-Generic coding of moving pictures and associated audio
information-Part 1:Systems
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
Reduces the risk of finding false frames that happens to have valid values and CRC.
Fixes ticket #9185 ffmpeg flac decoder incorrectly finds junk frame
https://trac.ffmpeg.org/ticket/9185
If a decoding error happens before frame side data is allocated, this assert may be
triggered. And since applying film grain is not enforced (we just warn it wasn't
applied and move on), we can just do that in such scenarios.
Fixes: Assertion failure
Fixes: clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5528650032742400
Signed-off-by: James Almer <jamrial@gmail.com>
MISB ST 0604 and ST 2101 require user data unregistered SEI messages
(precision timestamps and sensor identifiers) to be included. That
currently isn't supported for libx264. This patch adds support
for user data unregistered SEI messages in accordance with ISO/IEC
14496-10:2020(E) section D.1.7 (syntax) and D.2.7 (semantics).
This code is based on a similar change for libx265 (commit
1f58503013).
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Passing an uninitialized variable as argument to a function is
undefined behaviour (UB). The compiler can assume that UB does not
happen.
Hence, the compiler can assume that the variables are never
uninitialized when passed as argument, which means that the codepaths
that initializes them must be taken.
In ff_seek_frame_binary, this means that the compiler can assume
that the codepaths that initialize pos_min and pos_max are taken,
which means that the conditions "if (sti->index_entries)" and
"if (index >= 0)" can be optimized out.
Current Clang git versions (upcoming Clang 14) enabled an optimization
that does this, which broke the current version of this function
(which intentionally left the variables uninitialized, but silencing
warnings about being uninitialized). See [1] for discussion on
the matter.
[1] https://reviews.llvm.org/D105169#3069555
Signed-off-by: Martin Storsjö <martin@martin.st>
Don't use the loaded registers directly, avoiding stalls on in
order cores. Use vrhadd.u8 with q registers where easily possible.
Signed-off-by: Martin Storsjö <martin@martin.st>
Fixes: signed integer overflow: 1664525000 + 1013904223 cannot be represented in type 'int'
Fixes: 39865/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SPEEX_fuzzer-4979694508834816
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
VAAPI needs 2 output surface for film grain frame. One used for
reference and the other used for applying film grain and pushing
to downstream.
Signed-off-by: Fei Wang <fei.w.wang@intel.com>
For film grain clip, vaapi_av1 decoder will cache additional 8
surfaces that will be used to store frames which apply film grain.
So increase the pool size by plus 8 to avoid leak of surface.
Signed-off-by: Fei Wang <fei.w.wang@intel.com>
Defined in spec 5.9.24/5.9.25. Since function void
global_motion_params(AV1DecContext *s) already updates
gm type/params, the wminvalid parameter only need to get
the value from cur_frame.gm_invalid.
Signed-off-by: Tong Wu <tong1.wu@intel.com>
Since order_hint_bits_minus_1 range is 0~7, cur_frame_hint can be
most 128. And similar return value for cbs_av1_get_relative_dist.
So if plus them and use int8_t for the result may lose its precision.
Signed-off-by: Fei Wang <fei.w.wang@intel.com>
The condition (pos < len) is always true and the
rest of the OpenCL program code would not be read, while
the maximum number of "rb" is "len - pos - 1", and then, the
maximum number of the "pos" is "len - 1".
Fixes: trac.ffmpeg.org/ticket/9217
Similar in spirit and design to 66845cffc3, but slightly simpler due
to the lack of interlaced frames in HEVC. See that commit for more
details.
For the seed value, since no specification for this appears to exist, I
semi-arbitrarily decided to base it off the POC id alone, since there's
no analog of the idr_pic_id in HEVC's I-frames. This design is stable
across remuxes and seeks, but changes for adjacent frames with a period
that's typically long enough not to be noticeable, which makes it
satisfy all of the requirements that a film grain seed should have.
Tested with and without threading, using a patch to insert film grain
metadata artificially (for lack of real files containing film grain).
Preparation for metadata changes in the following patches. Saves
having to create an extra buffer.
Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
Limin Wang
Paul B Mahol
James Almer
Mattias Wadman
Brad Hards
Martin Storsjö
Gyan Doshi
Michael Niedermayer
Fei Wang
Tong Wu
Tsutomu Seki
Niklas Haas
Zane van Iperen
Wu Jianhua