Paul Elder
0ce8f2390b
Add libcamera V4L2 compatibility layer. This initial implementation supports the minimal set of V4L2 operations, which allows getting, setting, and enumerating formats, and streaming frames from a video device. Some data about the wrapped V4L2 video device are hardcoded. Add a build option named 'v4l2' and adjust the build system to selectively compile the V4L2 compatibility layer. For now we match the V4L2 device node to a libcamera camera based on a devnum that a pipeline handler may optionally map to a libcamera camera. Signed-off-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
32 lines
1.1 KiB
Meson
32 lines
1.1 KiB
Meson
v4l2_compat_sources = files([
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'v4l2_camera.cpp',
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'v4l2_camera_proxy.cpp',
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'v4l2_compat.cpp',
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'v4l2_compat_manager.cpp',
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])
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v4l2_compat_includes = [
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libcamera_includes,
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libcamera_internal_includes,
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]
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v4l2_compat_cpp_args = [
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# Meson enables large file support unconditionally, which redirect file
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# operations to 64-bit versions. This results in some symbols being
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# renamed, for instance open() being renamed to open64(). As the V4L2
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# adaptation wrapper needs to provide both 32-bit and 64-bit versions of
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# file operations, disable transparent large file support.
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'-U_FILE_OFFSET_BITS',
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'-D_FILE_OFFSET_BITS=32',
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'-fvisibility=hidden',
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]
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v4l2_compat = shared_library('v4l2-compat',
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v4l2_compat_sources,
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name_prefix : '',
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install : true,
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link_with : libcamera,
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include_directories : v4l2_compat_includes,
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dependencies : libcamera_deps,
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cpp_args : v4l2_compat_cpp_args)
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