When targeting windows, the .arch directive isn't available.
So far, when building for windows, we've always used gas-preprocessor,
both when using msvc's armasm and when using clang. Lately, clang/llvm
has implemented the last missing piece (altmacro support) for building
our assembly without gas-preprocessor. This means that we now build
for arm/windows with clang without any extra compatibility layer.
Signed-off-by: Martin Storsjö <martin@martin.st>
This makes the currently semi-public avpriv_aac_parse_header() function
private to libavcodec and adds a proper public API function to return
the parts of the ADTS header required in libavformat.
Purpose: avdevice/decklink: Removed pthread dependency by replacing
semaphore used in code appropriately. Doing so makes it easier to
build ffmpeg using Visual C++ on Windows. This is a contination of
Kyle Schwarz's "avdevice/decklink: Remove pthread dependency" patch
that is available at https://patchwork.ffmpeg.org/patch/2654/ . This
patch wasn't accepted, and as far as I can tell, there was no
follow-up after it was rejected.
Notes: Used Visual Studio 2015 (with update 3) for this.
Comments:
-- configure: Eliminated pthreads dependency for decklink_indev_deps
and decklink_outdev_deps and replaced with threads dependency
-- libavdevice/decklink_common.cpp / .h:
a) Eliminated semaphore and replaced with a combination of a mutex,
condition variable, and a counter (frames_buffer_available_spots).
b) Removed include of pthread.h and semaphore.h and now using
libavutil/thread.h instead.
-- libavdevice/decklink_dec.cpp: Eliminated include of pthread.h and
semaphore.h.
-- libavdevice/decklink_enc.cpp:
a) Eliminated include of pthread.h and semaphore.h.
b) Replaced use of semaphore with the equivalent using a combination
of a mutex, condition variable, and a counter
(frames_buffer_available_spots). In theory, libavutil/thread.h and
the associated code could have been modified instead to add
cross-platform implementations of the sem_ functions, but an
inspection of the ffmpeg source base indicates that there are only
two cases in which semaphores are used (including this one that was
replaced), so it was deemed to not be worth the effort.
Signed-off-by: Marton Balint <cus@passwd.hu>
Made appropriate changes to be able to successfully
build C++ files using a Visual C++ build on Windows.
Based on an earlier patch by Kyle Schwarz.
Comments:
-- compat/w32pthreads.h: Made appropriate changes to w32pthreads.h to
get it to build when it is being included in a C++ file and built
with Visual C++. This is mostly a copy of Kyle Schwarz's patch as
described above.
-- configure:
a) Now calling set_ccvars CXX to cause the various CXX_ variables to
be setup properly. For example, with MSVC (Microsoft Visual C++),
this causes CXX_O to be set to -Fo$@ instead of using the default
value. The default value does not work with Visual C++. This
change will also have the impact of correcting CXX_O (and possibly
CXX_C) for other compilers, although this is really only relevant
for the Intel compiler, in addition to MSVC.
b) Now using cl for the C++ compiler for the MSVC toolchain. This is
currently only relevant for building the
Blackmagic/Decklink-related files under avdevice.
Signed-off-by: Hendrik Leppkes <h.leppkes@gmail.com>
Needed for the C+11 atomics. Also change add_cxxflags to check_cxxflags.
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Marton Balint <cus@passwd.hu>
This filter does not implement all features of MPEG7. Missing features:
- compression of signature files
- work only on (cropped) parts of the video
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Regression from 4563a86f01.
Both need stdint.h included before the respective x264.h and xavs.h.
Old require() used different, separate checks that didn't actually
need stdint.h to work. require2()'s (now require) check_func_headers()
does include stdint.h but only after the custom headers.
For libxavs this would also be consequently fixed by libav's
commit 20abcaa273 which wasn't merged yet.
The configure has the --disable-manpages option for this purpose, and
--disable-pod2man is currently ignored due to that. This is also
consistent with the other documentation options.
libnpp was erroneously grouped up with libfdk-aac and openssl to check
if --enable-nonfree wasn't passed only with --enable-gpl in
9f28db47ac. The latter two are compatible
with LGPL, libnpp is not.
Signed-off-by: James Almer <jamrial@gmail.com>
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>
Recent versions of macOS provide more POSIX API (in particular,
clock_gettime) than previous versions and recent Apple toolchains
provide all that API, even when targeting older releases without
said API. Disallow linking to functions which might not be available
at runtime.
To actually have an effect, either add
--extra-cflags="-mmacosx-version-min=10.11" (or any other version
prior to 10.12) or set MACOSX_DEPLOYMENT_TARGET=10.11 when running
configure.
As a workaround for libav versions without this fix, one can
also add --extra-cflags="-mmacosx-version-min=10.11
-Werror=partial-availability" while running configure.
The -no_weak_imports flag is new in Xcode 8; in Xcode 7 it is not
supported. This is not an issue since Xcode 7 only ships with the
10.11 macOS SDK, which lacks clock_gettime.
Bug-Id: 1033
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
SDL adds some "special" CFLAGS that interfere with building normal
binaries. Capture those CFLAGS separately and avoid adding them to
the general CFLAGS.
Previously, all link-time dependencies were added for all libraries,
resulting in bogus link-time dependencies since not all dependencies
are shared across libraries. Also, in some cases like libavutil, not
all dependencies were taken into account, resulting in some cases of
underlinking.
To address all this mess a machinery is added for tracking which
dependency belongs to which library component and then leveraged
to determine correct dependencies for all individual libraries.
Martin Storsjö
James Almer
Michael Niedermayer
Diego Biurrun
Luca Barbato
Paul B Mahol
Clément Bœsch
Aaron Levinson
Carl Eugen Hoyos
Mark Thompson
Clément Bœsch
Marton Balint
Rostislav Pehlivanov
Timo Rothenpieler
Gerion Entrup
Matthieu Bouron
Ricardo Constantino
wang-bin
Anton Khirnov