summaryrefslogtreecommitdiff
path: root/include/linux/videodev2.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/videodev2.h')
0 files changed, 0 insertions, 0 deletions
1'>51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254
# SPDX-License-Identifier: CC0-1.0

project('libcamera', 'c', 'cpp',
    meson_version : '>= 0.56',
    version : '0.0.4',
    default_options : [
        'werror=true',
        'warning_level=2',
        'cpp_std=c++17',
    ],
    license : 'LGPL 2.1+')

# Generate version information. The libcamera_git_version variable contains the
# full version with git patch count and SHA1 (e.g. 1.2.3+211-c94a24f4), while
# the libcamera_version variable contains the major.minor.patch (e.g. 1.2.3)
# only. If the source tree isn't under git control, or if it matches the last
# git version tag, the build metadata (e.g. +211-c94a24f4) is omitted from
# libcamera_git_version.
libcamera_git_version = run_command('utils/gen-version.sh',
                                    meson.project_build_root(),
                                    meson.project_source_root(),
                                    check: false).stdout().strip()
if libcamera_git_version == ''
    libcamera_git_version = meson.project_version()
endif

libcamera_version = libcamera_git_version.split('+')[0]

# A shallow clone, or a clone without a reachable tag equivalent to the
# meson.project_version() could leave the project in a mis-described state.
# Produce a warning in this event, and fix to a best effort.
if libcamera_version != meson.project_version()
    warning('The sources disagree about the version: '
            + libcamera_version + ' != ' + meson.project_version())

    summary({'libcamera git version' : libcamera_git_version,
             'Source version match' : false,
            },
            bool_yn : true, section : 'Versions')

    # Replace the version components reported by git with the release version,
    # but keep all trailing information supplied by git.
    libcamera_git_version = (meson.project_version() +
                             libcamera_git_version.strip(libcamera_version))
    libcamera_version = meson.project_version()

    # Append a marker to show we have modified this version string
    libcamera_git_version += '-nvm'
endif

# Until we make ABI compatible releases, the full libcamera version is used as
# the soname. No ABI/API compatibility is guaranteed between releases (x.y.z).
#
# When automatic ABI based detection is used to increment the version, this
# will bump the minor number (x.y).
#
# When we declare a stable ABI/API we will provide a 1.0 release and the
# soversion at that point will be the 'major' release value (x).
libcamera_soversion = libcamera_version

summary({ 'Sources': libcamera_git_version, }, section : 'Versions')

# This script generates the .tarball-version file on a 'meson dist' command.
meson.add_dist_script('utils/run-dist.sh')

# Configure the build environment.
cc = meson.get_compiler('c')
cxx = meson.get_compiler('cpp')
config_h = configuration_data()

if cc.has_header_symbol('unistd.h', 'issetugid')
    config_h.set('HAVE_ISSETUGID', 1)
endif

if cc.has_header_symbol('locale.h', 'locale_t', prefix : '#define _GNU_SOURCE')
    config_h.set('HAVE_LOCALE_T', 1)
endif

if cc.has_header_symbol('stdlib.h', 'secure_getenv', prefix : '#define _GNU_SOURCE')
    config_h.set('HAVE_SECURE_GETENV', 1)
endif

common_arguments = [
    '-Wshadow',
    '-include', meson.current_build_dir() / 'config.h',
]

c_arguments = []
cpp_arguments = []

if cc.get_id() == 'clang'
    if cc.version().version_compare('<9')
        error('clang version is too old, libcamera requires 9.0 or newer')
    endif

    # Turn _FORTIFY_SOURCE by default on optimised builds (as it requires -O1
    # or higher). This is needed on clang only as gcc enables it by default.
    if get_option('optimization') != '0'
        common_arguments += [
            '-D_FORTIFY_SOURCE=2',
        ]
    endif

    # Use libc++ by default if available instead of libstdc++ when compiling
    # with clang.
    if cc.find_library('libc++', required: false).found()
        cpp_arguments += [
            '-stdlib=libc++',
        ]
    endif

    cpp_arguments += [
        '-Wextra-semi',
        '-Wthread-safety',
    ]
endif

if cc.get_id() == 'gcc'
    if cc.version().version_compare('<8')
        error('gcc version is too old, libcamera requires 8.0 or newer')
    endif

    # On gcc 8, the file system library is provided in a separate static
    # library.
    if cc.version().version_compare('<9')
        cpp_arguments += [
            '-lstdc++fs',
        ]
    endif

    # gcc 7.1 introduced processor-specific ABI breakages related to parameter
    # passing on ARM platforms. This generates a large number of messages
    # during compilation. Silence them.
    if host_machine.cpu_family() == 'arm'
        cpp_arguments += [
            '-Wno-psabi',
        ]
    endif
endif

# We use C99 designated initializers for arrays as C++ has no equivalent
# feature. Both gcc and clang support this extension, but recent
# versions of clang generate a warning that needs to be disabled.
if cc.has_argument('-Wno-c99-designator')
    common_arguments += [
        '-Wno-c99-designator',
    ]
endif

c_arguments += common_arguments
cpp_arguments += common_arguments

add_project_arguments(c_arguments, language : 'c')
add_project_arguments(cpp_arguments, language : 'cpp')
add_project_link_arguments(cpp_arguments, language : 'cpp')

libcamera_includes = include_directories('include')

# Sub-directories fill py_modules with their dependencies.
py_modules = []

# Libraries used by multiple components
liblttng = dependency('lttng-ust', required : get_option('tracing'))

# Pipeline handlers
#
pipelines = get_option('pipelines')

arch_arm = ['arm', 'aarch64']
arch_x86 = ['x86', 'x86_64']
pipelines_support = {
    'imx8-isi':     arch_arm,
    'ipu3':         arch_x86,
    'raspberrypi':  arch_arm,
    'rkisp1':       arch_arm,
    'simple':       arch_arm,
    'uvcvideo':     ['any'],
    'vimc':         ['test'],
}

if pipelines.contains('all')
    pipelines = pipelines_support.keys()
elif pipelines.contains('auto')
    host_cpu = host_machine.cpu_family()
    pipelines = []
    foreach pipeline, archs : pipelines_support
        if host_cpu in archs or 'any' in archs
            pipelines += pipeline
        endif
    endforeach
endif

# Tests require the vimc pipeline handler, include it automatically when tests
# are enabled.
if get_option('test')
    foreach pipeline, archs : pipelines_support
        if 'test' in archs and pipeline not in pipelines
            message('Enabling ' + pipeline + ' pipeline handler for tests')
            pipelines += pipeline
        endif
    endforeach
endif

# Utilities are parsed first to provide support for other components.
subdir('utils')

subdir('include')
subdir('src')

# The documentation and test components are optional and can be disabled
# through configuration values. They are enabled by default.

subdir('Documentation')
subdir('test')

if not meson.is_cross_build()
    kernel_version_req = '>= 5.0.0'
    kernel_version = run_command('uname', '-r', check: true).stdout().strip()
    if not kernel_version.version_compare(kernel_version_req)
        warning('The current running kernel version @0@ is too old to run libcamera.'
                .format(kernel_version))
        warning('If you intend to use libcamera on this machine, please upgrade to a kernel @0@.'
                .format(kernel_version_req))
    endif
endif

# Create a symlink from the build root to the source root. This is used when
# running libcamera from the build directory to locate resources in the source
# directory (such as IPA configuration files).
run_command('ln', '-fsT', meson.project_source_root(), meson.project_build_root() / 'source',
            check: true)

configure_file(output : 'config.h', configuration : config_h)

# Check for python installation and modules.
py_mod = import('python')
py_mod.find_installation('python3', modules: py_modules)

## Summarise Configurations
summary({
            'Enabled pipelines': pipelines,
            'Enabled IPA modules': enabled_ipa_modules,
            'Tracing support': tracing_enabled,
            'Android support': android_enabled,
            'GStreamer support': gst_enabled,
            'Python bindings': pycamera_enabled,
            'V4L2 emulation support': v4l2_enabled,
            'cam application': cam_enabled,
            'qcam application': qcam_enabled,
            'lc-compliance application': lc_compliance_enabled,
            'Unit tests': test_enabled,
        },
        section : 'Configuration',
        bool_yn : true)