This adds tons of code for no other benefit than making VideoToolbox
support conform with the new hwaccel API (using hw_device_ctx and
hw_frames_ctx).
Since VideoToolbox decoding does not actually require the user to
allocate frames, the new code does mostly nothing.
One benefit is that ffmpeg_videotoolbox.c can be dropped once generic
hwaccel support for ffmpeg.c is merged from Libav.
Does not consider VDA or VideoToolbox encoding.
Fun fact: the frame transfer functions are copied from vaapi, as the
mapping makes copying generic boilerplate. Mapping itself is not
exported by the VT code, because I don't know how to test.
Fixes the following warning:
libavutil/timecode.c:103:60: warning: '%02d' directive output may be truncated writing between 2 and 10 bytes into a region of size between 0 and 7
Purpose: libavutil/thread.h: Fixed g++ build error when ASSERT_LEVEL
is greater than 1. This is only relevant when thread.h is included by
C++ files. In this case, the relevant code is only defined if
HAVE_PTHREADS is defined as 1. Use configure --assert-level=2 to do
so.
Note: Issue discovered as a result of Coverity build failure. Cause
of build failure pinpointed by Hendrik Leppkes.
Comments:
-- libavutil/thread.h: Altered ASSERT_PTHREAD_NORET definition such
that it uses av_make_error_string instead of av_err2str().
av_err2str() uses a "parenthesized type followed by an initializer
list", which is apparently not valid C++. This issue started
occurring because thread.h is now included by the DeckLink C++
files. The alteration does the equivalent of what av_err2str()
does, but instead declares the character buffer as a local
variable.
Signed-off-by: Marton Balint <cus@passwd.hu>
Use AVBprint to implement av_strreplace
add av_strreplace test case TEST_STRREPLACE
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
This avoids potential undefined behavior in debug mode while still allowing
developers which want to check for potential additional overflows to do so
by manually enabling this.
Reviewed-by: wm4
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
USE_ATOMICS is only set if there is no thread implementation enabled, in
which case you can't expect any lock mechanism from FFmpeg.
This is also conflicting with the incoming use of stdatomic.
These values are defined to be 32bit in the specification,
so it makes more sense to store them as fixed width.
Based on a patch by Micahel Niedermayer <michael@niedermayer.cc>.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Reflects the actual code and silences a gcc warning:
ffprobe.c:1797:42: warning: passing argument 1 of 'av_spherical_tile_bounds' discards 'const' qualifier from pointer target type
This fixes building with clang for linux with PIC enabled.
This is cherrypicked from libav commit
8847eeaa14.
Signed-off-by: Martin Storsjö <martin@martin.st>
The Chen-Shapiro(CS) test was used to test normality for
Lagged Fibonacci PRNG.
Normality Hypothesis Test:
The null hypothesis formally tests if the population
the sample represents is normally-distributed. For
CS, when the normality hypothesis is True, the
distribution of QH will have a mean close to 1.
Information on CS can be found here:
http://www.stata-journal.com/sjpdf.html?articlenum=st0264http://www.originlab.com/doc/Origin-Help/NormalityTest-Algorithm
Signed-off-by: Thomas Turner <thomastdt@googlemail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This reverts commit faa9d29829.
This change became superfluous when support for C11 atomics was introduced.
Reverting it will make the removal of this implementation in an upcoming
merge conflict free.
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
The code modifying the buffer on big endian systems was removed.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>
Found a case where we use size==0, the other related commits
remain needed, and should be sufficient to fix the original issue
This reverts commit 7e4f32f4e4.
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Allow all struct fields to be accessed directly, as long as they're
public.
Before this change, many fields were "public", but could be accessed via
AVOption only. This meant they were effectively not public, but were
present for documentation purposes, which was incredibly confusing at
best.
The size 0 special case causes side data to be created which is
different and a special case if for any reasons size = 0 is passed
Fixes: multiple runtime error: null pointer passed as argument 1, which is declared to never be null
Fixes: 653/clusterfuzz-testcase-5773837415219200
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
wm4
James Almer
Michael Niedermayer
Clément Bœsch
Carl Eugen Hoyos
Aaron Levinson
Steven Liu
Paul B Mahol
Steve Lhomme
Clément Bœsch
Jun Zhao
Vittorio Giovara
Martin Storsjö
Thomas Turner
Mark Thompson
Micah Galizia