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pipewire-v4l2: the start of a v4l2 LD_PRELOAD library

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This commit is contained in:
Wim Taymans 2021-10-06 20:24:08 +02:00
parent 57b3fe537e
commit e68fd36f90
8 changed files with 910 additions and 0 deletions
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36
pipewire-v4l2/src/meson.build Normal file
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pipewire_v4l2_sources = [
'pipewire-v4l2.c',
'v4l2-func.c',
]
pipewire_v4l2_c_args = [
# Meson enables large file support unconditionally, which redirect file
# operations to 64-bit versions. This results in some symbols being
# renamed, for instance open() being renamed to open64(). As the V4L2
# adaptation wrapper needs to provide both 32-bit and 64-bit versions of
# file operations, disable transparent large file support.
'-U_FILE_OFFSET_BITS',
'-D_FILE_OFFSET_BITS=32',
'-D_LARGEFILE64_SOURCE',
'-fvisibility=hidden',
]
libv4l2_path = modules_install_dir / 'v4l2'
libv4l2_path_dlopen = modules_install_dir_dlopen / 'v4l2'
tools_config = configuration_data()
tools_config.set('LIBV4L2_PATH', libv4l2_path_dlopen)
configure_file(input : 'pw-v4l2.in',
output : 'pw-v4l2',
configuration : tools_config,
install_dir : pipewire_bindir)
pipewire_v4l2 = shared_library('pw-v4l2',
pipewire_v4l2_sources,
c_args : pipewire_v4l2_c_args,
include_directories : [configinc],
dependencies : [pipewire_dep, mathlib, dl_lib],
install : true,
install_dir : libv4l2_path,
)