# Copyright © 2018-2024, VideoLAN and dav1d authors # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # 1. Redistributions of source code must retain the above copyright notice, this # list of conditions and the following disclaimer. # # 2. Redistributions in binary form must reproduce the above copyright notice, # this list of conditions and the following disclaimer in the documentation # and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. project('dav1d', ['c'], version: '1.4.3', default_options: ['c_std=c99', 'warning_level=2', 'buildtype=release', 'b_ndebug=if-release'], meson_version: '>= 0.49.0') dav1d_soname_version = '7.0.0' dav1d_api_version_array = dav1d_soname_version.split('.') dav1d_api_version_major = dav1d_api_version_array[0] dav1d_api_version_minor = dav1d_api_version_array[1] dav1d_api_version_revision = dav1d_api_version_array[2] dav1d_src_root = meson.current_source_dir() cc = meson.get_compiler('c') # Configuratin data for config.h cdata = configuration_data() # Configuration data for config.asm cdata_asm = configuration_data() # Include directories dav1d_inc_dirs = include_directories(['.', 'include/dav1d', 'include']) # # Option handling # # Bitdepth option dav1d_bitdepths = get_option('bitdepths') foreach bitdepth : ['8', '16'] cdata.set10('CONFIG_@0@BPC'.format(bitdepth), dav1d_bitdepths.contains(bitdepth)) endforeach # ASM option is_asm_enabled = (get_option('enable_asm') == true and (host_machine.cpu_family() == 'aarch64' or host_machine.cpu_family().startswith('arm') or host_machine.cpu() == 'ppc64le' or host_machine.cpu_family().startswith('riscv') or host_machine.cpu_family().startswith('loongarch') or host_machine.cpu_family() == 'x86' or (host_machine.cpu_family() == 'x86_64' and cc.get_define('__ILP32__').strip() == ''))) cdata.set10('HAVE_ASM', is_asm_enabled) if is_asm_enabled and get_option('b_sanitize') == 'memory' error('asm causes false positive with memory sanitizer. Use \'-Denable_asm=false\'.') endif cdata.set10('TRIM_DSP_FUNCTIONS', get_option('trim_dsp') == 'true' or (get_option('trim_dsp') == 'if-release' and get_option('buildtype') == 'release')) # Logging option cdata.set10('CONFIG_LOG', get_option('logging')) cdata.set10('CONFIG_MACOS_KPERF', get_option('macos_kperf')) # # OS/Compiler checks and defines # # Arguments in test_args will be used even on feature tests test_args = [] optional_arguments = [] optional_link_arguments = [] if host_machine.system() in ['linux', 'gnu', 'emscripten'] test_args += '-D_GNU_SOURCE' add_project_arguments('-D_GNU_SOURCE', language: 'c') endif if host_machine.system() == 'windows' cdata.set('_WIN32_WINNT', '0x0601') cdata.set('UNICODE', 1) # Define to 1 for Unicode (Wide Chars) APIs cdata.set('_UNICODE', 1) # Define to 1 for Unicode (Wide Chars) APIs cdata.set('__USE_MINGW_ANSI_STDIO', 1) # Define to force use of MinGW printf cdata.set('_CRT_DECLARE_NONSTDC_NAMES', 1) # Define to get off_t from sys/types.h on MSVC if cc.has_function('fseeko', prefix : '#include ', args : test_args) cdata.set('_FILE_OFFSET_BITS', 64) # Not set by default by Meson on Windows else cdata.set('fseeko', '_fseeki64') cdata.set('ftello', '_ftelli64') endif if host_machine.cpu_family() == 'x86_64' if cc.get_argument_syntax() != 'msvc' optional_link_arguments += '-Wl,--dynamicbase,--nxcompat,--tsaware,--high-entropy-va' endif elif host_machine.cpu_family() == 'x86' or host_machine.cpu_family() == 'arm' if cc.get_argument_syntax() == 'msvc' optional_link_arguments += '/largeaddressaware' else optional_link_arguments += '-Wl,--dynamicbase,--nxcompat,--tsaware,--large-address-aware' endif endif # On Windows, we use a compatibility layer to emulate pthread thread_dependency = [] thread_compat_dep = declare_dependency(sources : files('src/win32/thread.c')) rt_dependency = [] rc_version_array = meson.project_version().split('.') winmod = import('windows') rc_data = configuration_data() rc_data.set('PROJECT_VERSION_MAJOR', rc_version_array[0]) rc_data.set('PROJECT_VERSION_MINOR', rc_version_array[1]) rc_data.set('PROJECT_VERSION_REVISION', rc_version_array[2]) rc_data.set('API_VERSION_MAJOR', dav1d_api_version_major) rc_data.set('API_VERSION_MINOR', dav1d_api_version_minor) rc_data.set('API_VERSION_REVISION', dav1d_api_version_revision) rc_data.set('COPYRIGHT_YEARS', '2018-2024') else thread_dependency = dependency('threads') thread_compat_dep = [] rt_dependency = [] if cc.has_function('clock_gettime', prefix : '#include ', args : test_args) cdata.set('HAVE_CLOCK_GETTIME', 1) elif host_machine.system() not in ['darwin', 'ios', 'tvos'] rt_dependency = cc.find_library('rt', required: false) if not cc.has_function('clock_gettime', prefix : '#include ', args : test_args, dependencies : rt_dependency) error('clock_gettime not found') endif cdata.set('HAVE_CLOCK_GETTIME', 1) endif if cc.has_function('posix_memalign', prefix : '#include ', args : test_args) cdata.set('HAVE_POSIX_MEMALIGN', 1) endif endif # check for fseeko on android. It is not always available if _FILE_OFFSET_BITS is defined to 64 have_fseeko = true if host_machine.system() == 'android' if not cc.has_function('fseeko', prefix : '#include ', args : test_args) if cc.has_function('fseeko', prefix : '#include ', args : test_args + ['-U_FILE_OFFSET_BITS']) warning('Files larger than 2 gigabytes might not be supported in the dav1d CLI tool.') add_project_arguments('-U_FILE_OFFSET_BITS', language: 'c') elif get_option('enable_tools') error('dav1d CLI tool needs fseeko()') else have_fseeko = false endif endif endif libdl_dependency = [] if host_machine.system() == 'linux' libdl_dependency = cc.find_library('dl', required : false) if cc.has_function('dlsym', prefix : '#include ', args : test_args, dependencies : libdl_dependency) cdata.set('HAVE_DLSYM', 1) endif endif libm_dependency = cc.find_library('m', required: false) # Header checks stdatomic_dependencies = [] if not cc.check_header('stdatomic.h') if cc.get_id() == 'msvc' # we have a custom replacement for MSVC stdatomic_dependencies += declare_dependency( include_directories : include_directories('include/compat/msvc'), ) elif cc.compiles('''int main() { int v = 0; return __atomic_fetch_add(&v, 1, __ATOMIC_SEQ_CST); }''', name : 'GCC-style atomics', args : test_args) stdatomic_dependencies += declare_dependency( include_directories : include_directories('include/compat/gcc'), ) else error('Atomics not supported') endif endif if host_machine.cpu_family().startswith('wasm') # enable atomics + bulk-memory features stdatomic_dependencies += thread_dependency.partial_dependency(compile_args: true) endif if cc.check_header('unistd.h') cdata.set('HAVE_UNISTD_H', 1) endif if cc.check_header('io.h') cdata.set('HAVE_IO_H', 1) endif if cc.check_header('pthread_np.h') cdata.set('HAVE_PTHREAD_NP_H', 1) test_args += '-DHAVE_PTHREAD_NP_H' endif # Function checks if not cc.has_function('getopt_long', prefix : '#include ', args : test_args) getopt_dependency = declare_dependency( sources: files('tools/compat/getopt.c'), include_directories : include_directories('include/compat'), ) else getopt_dependency = [] endif if (host_machine.cpu_family() == 'aarch64' or host_machine.cpu_family().startswith('arm') or host_machine.cpu_family().startswith('loongarch') or host_machine.cpu() == 'ppc64le' or host_machine.cpu_family().startswith('riscv')) if cc.has_function('getauxval', prefix : '#include ', args : test_args) cdata.set('HAVE_GETAUXVAL', 1) endif if cc.has_function('elf_aux_info', prefix : '#include ', args : test_args) cdata.set('HAVE_ELF_AUX_INFO', 1) endif endif pthread_np_prefix = ''' #include #ifdef HAVE_PTHREAD_NP_H #include #endif ''' if cc.has_function('pthread_getaffinity_np', prefix : pthread_np_prefix, args : test_args, dependencies : thread_dependency) cdata.set('HAVE_PTHREAD_GETAFFINITY_NP', 1) endif if cc.has_function('pthread_setaffinity_np', prefix : pthread_np_prefix, args : test_args, dependencies : thread_dependency) cdata.set('HAVE_PTHREAD_SETAFFINITY_NP', 1) endif if cc.compiles('int x = _Generic(0, default: 0);', name: '_Generic', args: test_args) cdata.set('HAVE_C11_GENERIC', 1) endif # Compiler flag tests if cc.has_argument('-fvisibility=hidden') add_project_arguments('-fvisibility=hidden', language: 'c') else warning('Compiler does not support -fvisibility=hidden, all symbols will be public!') endif # Compiler flags that should be set # But when the compiler does not supports them # it is not an error and silently tolerated if cc.get_argument_syntax() != 'msvc' optional_arguments += [ '-Wundef', '-Werror=vla', '-Wno-maybe-uninitialized', '-Wno-missing-field-initializers', '-Wno-unused-parameter', '-Wstrict-prototypes', '-Werror=missing-prototypes', '-Wshorten-64-to-32', ] if host_machine.cpu_family() == 'x86' optional_arguments += [ '-msse2', '-mfpmath=sse', ] endif else optional_arguments += [ '-wd4028', # parameter different from declaration '-wd4090', # broken with arrays of pointers '-wd4996' # use of POSIX functions ] endif if (get_option('buildtype') != 'debug' and get_option('buildtype') != 'plain') optional_arguments += '-fomit-frame-pointer' optional_arguments += '-ffast-math' endif if (host_machine.system() in ['darwin', 'ios', 'tvos'] and cc.get_id() == 'clang' and cc.version().startswith('11')) # Workaround for Xcode 11 -fstack-check bug, see #301 optional_arguments += '-fno-stack-check' endif if (host_machine.cpu_family() == 'aarch64' or host_machine.cpu_family().startswith('arm')) optional_arguments += '-fno-align-functions' endif add_project_arguments(cc.get_supported_arguments(optional_arguments), language : 'c') add_project_link_arguments(cc.get_supported_link_arguments(optional_link_arguments), language : 'c') # libFuzzer related things fuzzing_engine = get_option('fuzzing_engine') if fuzzing_engine == 'libfuzzer' if not cc.has_argument('-fsanitize=fuzzer') error('fuzzing_engine libfuzzer requires "-fsanitize=fuzzer"') endif fuzzer_args = ['-fsanitize=fuzzer-no-link', '-fsanitize=fuzzer'] add_project_arguments(cc.first_supported_argument(fuzzer_args), language : 'c') endif cdata.set10('ENDIANNESS_BIG', host_machine.endian() == 'big') if host_machine.cpu_family().startswith('x86') if get_option('stack_alignment') > 0 stack_alignment = get_option('stack_alignment') elif host_machine.cpu_family() == 'x86_64' or host_machine.system() in ['linux', 'darwin', 'ios', 'tvos'] stack_alignment = 16 else stack_alignment = 4 endif cdata_asm.set('STACK_ALIGNMENT', stack_alignment) endif cdata.set10('ARCH_AARCH64', host_machine.cpu_family() == 'aarch64' or host_machine.cpu() == 'arm64') cdata.set10('ARCH_ARM', host_machine.cpu_family().startswith('arm') and host_machine.cpu() != 'arm64') if (is_asm_enabled and (host_machine.cpu_family() == 'aarch64' or host_machine.cpu_family().startswith('arm'))) as_func_code = '''__asm__ ( ".func meson_test" ".endfunc" ); ''' have_as_func = cc.compiles(as_func_code) cdata.set10('HAVE_AS_FUNC', have_as_func) # fedora package build infrastructure uses a gcc specs file to enable # '-fPIE' by default. The chosen way only adds '-fPIE' to the C compiler # with integrated preprocessor. It is not added to the standalone # preprocessor or the preprocessing stage of '.S' files. So we have to # compile code to check if we have to define PIC for the arm asm to # avoid absolute relocations when building for example checkasm. check_pic_code = ''' #if defined(PIC) #error "PIC already defined" #elif !(defined(__PIC__) || defined(__pic__)) #error "no pic" #endif ''' if cc.compiles(check_pic_code) cdata.set('PIC', '3') endif if host_machine.cpu_family() == 'aarch64' have_as_arch = cc.compiles('''__asm__ (".arch armv8-a");''') cdata.set10('HAVE_AS_ARCH_DIRECTIVE', have_as_arch) as_arch_str = '' if have_as_arch as_arch_level = 'armv8-a' # Check what .arch levels are supported. In principle, we only # want to detect up to armv8.2-a here (binutils requires that # in order to enable i8mm). However, older Clang versions # (before Clang 17, and Xcode versions up to and including 15.0) # didn't support controlling dotprod/i8mm extensions via # .arch_extension, therefore try to enable a high enough .arch # level as well, to implicitly make them available via that. foreach arch : ['armv8.2-a', 'armv8.4-a', 'armv8.6-a'] if cc.compiles('__asm__ (".arch ' + arch + '\\n");') as_arch_level = arch endif endforeach # Clang versions before 17 also had a bug # (https://github.com/llvm/llvm-project/issues/32220) # causing a plain ".arch " to not have any effect unless it # had an extra "+" included - but it was activated on the # next ".arch_extension" directive instead. Check if we can include # "+crc" as dummy feature to make the .arch directive behave as # expected and take effect right away. if cc.compiles('__asm__ (".arch ' + as_arch_level + '+crc\\n");') as_arch_level = as_arch_level + '+crc' endif cdata.set('AS_ARCH_LEVEL', as_arch_level) as_arch_str = '".arch ' + as_arch_level + '\\n"' endif extensions = { 'dotprod': 'udot v0.4s, v0.16b, v0.16b', 'i8mm': 'usdot v0.4s, v0.16b, v0.16b', 'sve': 'whilelt p0.s, x0, x1', 'sve2': 'sqrdmulh z0.s, z0.s, z0.s', } foreach name, instr : extensions # Test for support for the various extensions. First test if # the assembler supports the .arch_extension directive for # enabling/disabling the extension, then separately check whether # the instructions themselves are supported. Even if .arch_extension # isn't supported, we may be able to assemble the instructions # if the .arch level includes support for them. code = '__asm__ (' + as_arch_str code += '".arch_extension ' + name + '\\n"' code += ');' supports_archext = cc.compiles(code) cdata.set10('HAVE_AS_ARCHEXT_' + name.to_upper() + '_DIRECTIVE', supports_archext) code = '__asm__ (' + as_arch_str if supports_archext code += '".arch_extension ' + name + '\\n"' endif code += '"' + instr + '\\n"' code += ');' supports_instr = cc.compiles(code, name: name.to_upper()) cdata.set10('HAVE_' + name.to_upper(), supports_instr) endforeach endif endif cdata.set10('ARCH_X86', host_machine.cpu_family().startswith('x86')) cdata.set10('ARCH_X86_64', host_machine.cpu_family() == 'x86_64') cdata.set10('ARCH_X86_32', host_machine.cpu_family() == 'x86') if host_machine.cpu_family().startswith('x86') cdata_asm.set('private_prefix', 'dav1d') cdata_asm.set10('ARCH_X86_64', host_machine.cpu_family() == 'x86_64') cdata_asm.set10('ARCH_X86_32', host_machine.cpu_family() == 'x86') cdata_asm.set10('PIC', true) # Convert SSE asm into (128-bit) AVX when compiler flags are set to use AVX instructions cdata_asm.set10('FORCE_VEX_ENCODING', cc.get_define('__AVX__').strip() != '') endif cdata.set10('ARCH_PPC64LE', host_machine.cpu() == 'ppc64le') cdata.set10('ARCH_RISCV', host_machine.cpu_family().startswith('riscv')) cdata.set10('ARCH_RV32', host_machine.cpu_family() == 'riscv32') cdata.set10('ARCH_RV64', host_machine.cpu_family() == 'riscv64') cdata.set10('ARCH_LOONGARCH', host_machine.cpu_family().startswith('loongarch')) cdata.set10('ARCH_LOONGARCH32', host_machine.cpu_family() == 'loongarch32') cdata.set10('ARCH_LOONGARCH64', host_machine.cpu_family() == 'loongarch64') # meson's cc.symbols_have_underscore_prefix() is unfortunately unrelieably # when additional flags like '-fprofile-instr-generate' are passed via CFLAGS # see following meson issue https://github.com/mesonbuild/meson/issues/5482 if (host_machine.system() in ['darwin', 'ios', 'tvos'] or (host_machine.system() == 'windows' and host_machine.cpu_family() == 'x86')) cdata.set10('PREFIX', true) cdata_asm.set10('PREFIX', true) endif # # ASM specific stuff # if is_asm_enabled and host_machine.cpu_family().startswith('x86') # NASM compiler support nasm = find_program('nasm') # check NASM version if nasm.found() nasm_r = run_command(nasm, '-v', check: true) out = nasm_r.stdout().strip().split() if out[1].to_lower() == 'version' if out[2].version_compare('<2.14') error('nasm 2.14 or later is required, found nasm @0@'.format(out[2])) endif else error('unexpected nasm version string: @0@'.format(nasm_r.stdout())) endif endif # Generate config.asm config_asm_target = configure_file(output: 'config.asm', output_format: 'nasm', configuration: cdata_asm) if host_machine.system() == 'windows' nasm_format = 'win' elif host_machine.system() in ['darwin', 'ios', 'tvos'] nasm_format = 'macho' else nasm_format = 'elf' endif if host_machine.cpu_family() == 'x86_64' nasm_format += '64' else nasm_format += '32' endif nasm_gen = generator(nasm, output: '@BASENAME@.obj', depfile: '@BASENAME@.obj.ndep', arguments: [ '-f', nasm_format, '-I', '@0@/src/'.format(dav1d_src_root), '-I', '@0@/'.format(meson.current_build_dir()), '-MQ', '@OUTPUT@', '-MF', '@DEPFILE@', '@EXTRA_ARGS@', '@INPUT@', '-o', '@OUTPUT@' ]) endif use_gaspp = false if (is_asm_enabled and (host_machine.cpu_family() == 'aarch64' or host_machine.cpu_family().startswith('arm')) and cc.get_argument_syntax() == 'msvc' and (cc.get_id() != 'clang-cl' or meson.version().version_compare('<0.58.0'))) gaspp = find_program('gas-preprocessor.pl') use_gaspp = true gaspp_gen = generator(gaspp, output: '@BASENAME@.obj', arguments: [ '-as-type', 'armasm', '-arch', host_machine.cpu_family(), '--', host_machine.cpu_family() == 'aarch64' ? 'armasm64' : 'armasm', '-nologo', '-I@0@'.format(dav1d_src_root), '-I@0@/'.format(meson.current_build_dir()), '@INPUT@', '-c', '-o', '@OUTPUT@' ]) endif if is_asm_enabled and host_machine.cpu_family().startswith('riscv') as_option_code = '''__asm__ ( ".option arch, +v\n" "vsetivli zero, 0, e8, m1, ta, ma" ); ''' if not cc.compiles(as_option_code, name : 'RISC-V Vector') error('Compiler doesn\'t support \'.option arch\' asm directive. Update to binutils>=2.38 or clang>=17 or use \'-Denable_asm=false\'.') endif endif # Generate config.h config_h_target = configure_file(output: 'config.h', configuration: cdata) # # Include subdir meson.build files # The order is important! subdir('include') subdir('doc') subdir('src') subdir('tools') subdir('examples') subdir('tests')