libx264/cci.20220602

from conan.tools.files import rename

from conans import ConanFile, tools, AutoToolsBuildEnvironment

import contextlib

import os

required_conan_version = ">=1.38.0"

class LibX264Conan(ConanFile):

    name = "libx264"

    url = "https://github.com/conan-io/conan-center-index"

    homepage = "https://www.videolan.org/developers/x264.html"

    description = "x264 is a free software library and application for encoding video streams into the " \

                  "H.264/MPEG-4 AVC compression format"

    topics = ("libx264", "video", "encoding")

    license = "GPL-2.0"

    settings = "os", "arch", "compiler", "build_type"

    options = {

        "shared": [True, False],

        "fPIC": [True, False],

        "bit_depth": [8, 10, "all"],

    }

    default_options = {

        "shared": False,

        "fPIC": True,

        "bit_depth": "all",

    }

    _autotools = None

    _override_env = {}

    @property

    def _is_msvc(self):

        return str(self.settings.compiler) in ["Visual Studio", "msvc"]

    @property

    def _source_subfolder(self):

        return "source_subfolder"

    @property

    def _settings_build(self):

        return getattr(self, "settings_build", self.settings)

    def config_options(self):

        if self.settings.os == "Windows":

            del self.options.fPIC

    def configure(self):

        if self.options.shared:

            del self.options.fPIC

        del self.settings.compiler.libcxx

        del self.settings.compiler.cppstd

    @property

    def _with_nasm(self):

        return self.settings.arch in ("x86", "x86_64")

    def build_requirements(self):

        if self._with_nasm:

            self.build_requires("nasm/2.15.05")

        if self._settings_build.os == "Windows" and not tools.get_env("CONAN_BASH_PATH"):

            self.build_requires("msys2/cci.latest")

    def source(self):

        tools.get(**self.conan_data["sources"][self.version],

                  destination=self._source_subfolder, strip_root=True)

    @contextlib.contextmanager

    def _build_context(self):

        with tools.vcvars(self) if self._is_msvc else tools.no_op():

            yield

    @property

    def env(self):

        ret = super(LibX264Conan, self).env

        ret.update(self._override_env)

        return ret

    def _configure_autotools(self):

        if self._autotools:

            return self._autotools

        self._autotools = AutoToolsBuildEnvironment(self, win_bash=tools.os_info.is_windows)

        self._autotools.libs = []

        extra_asflags = []

        extra_cflags = []

        extra_ldflags = []

        args = [

            "--bit-depth=%s" % str(self.options.bit_depth),

            "--disable-cli",

            "--prefix={}".format(tools.unix_path(self.package_folder)),

        ]

        if self.options.shared:

            args.append("--enable-shared")

        else:

            args.append("--enable-static")

        if self.options.get_safe("fPIC", self.settings.os != "Windows"):

            args.append("--enable-pic")

        if self.settings.build_type == "Debug":

            args.append("--enable-debug")

        if self.settings.os == "Macos" and self.settings.arch == "armv8":

            # bitstream-a.S:29:18: error: unknown token in expression

            extra_asflags.append("-arch arm64")

            extra_ldflags.append("-arch arm64")

            args.append("--host=aarch64-apple-darwin")

        if self._with_nasm:

            # FIXME: get using user_build_info

            self._override_env["AS"] = os.path.join(self.dependencies.build["nasm"].package_folder, "bin", "nasm{}".format(".exe" if tools.os_info.is_windows else "")).replace("\\", "/")

        if tools.cross_building(self):

            if self.settings.os == "Android":

                # the as of ndk does not work well for building libx264

                self._override_env["AS"] = os.environ["CC"]

                ndk_root = tools.unix_path(os.environ["NDK_ROOT"])

                arch = {

                    "armv7": "arm",

                    "armv8": "aarch64",

                    "x86": "i686",

                    "x86_64": "x86_64",

                }.get(str(self.settings.arch))

                abi = "androideabi" if self.settings.arch == "armv7" else "android"

                args.append("--cross-prefix={}".format("{}/bin/{}-linux-{}-".format(ndk_root, arch, abi)))

        if self._is_msvc:

            self._override_env["CC"] = "cl -nologo"

            extra_cflags.extend(self._autotools.flags)

            if not (self.settings.compiler == "Visual Studio" and tools.Version(self.settings.compiler.version) < "12"):

                extra_cflags.append("-FS")

        build_canonical_name = None

        host_canonical_name = None

        if self._is_msvc:

            # autotools does not know about the msvc canonical name(s)

            build_canonical_name = False

            host_canonical_name = False

        if extra_asflags:

            args.append("--extra-asflags={}".format(" ".join(extra_asflags)))

        if extra_cflags:

            args.append("--extra-cflags={}".format(" ".join(extra_cflags)))

        if extra_ldflags:

            args.append("--extra-ldflags={}".format(" ".join(extra_ldflags)))

        self._autotools.configure(args=args, vars=self._override_env, configure_dir=self._source_subfolder, build=build_canonical_name, host=host_canonical_name)

        return self._autotools

    def build(self):

        with self._build_context():

            # relocatable shared lib on macOS

            tools.replace_in_file(os.path.join(self._source_subfolder, "configure"),

                                  "-install_name \\$(DESTDIR)\\$(libdir)/",

                                  "-install_name @rpath/")

            autotools = self._configure_autotools()

            autotools.make()

    def package(self):

        self.copy(pattern="COPYING", src=self._source_subfolder, dst="licenses")

        with self._build_context():

            autotools = self._configure_autotools()

            autotools.install()

        tools.rmdir(os.path.join(self.package_folder, "lib", "pkgconfig"))

        if self._is_msvc:

            ext = ".dll.lib" if self.options.shared else ".lib"

            rename(self, os.path.join(self.package_folder, "lib", "libx264{}".format(ext)),

                         os.path.join(self.package_folder, "lib", "x264.lib"))

    def package_info(self):

        self.cpp_info.set_property("pkg_config_name", "x264")

        self.cpp_info.libs = ["x264"]

        if self._is_msvc and self.options.shared:

            self.cpp_info.defines.append("X264_API_IMPORTS")

        if self.settings.os in ("FreeBSD", "Linux"):

            self.cpp_info.system_libs.extend(["dl", "pthread", "m"])

        elif self.settings.os == "Android":

            self.cpp_info.system_libs.extend(["dl", "m"])

        # TODO: to remove in conan v2 once pkg_config generator removed

        self.cpp_info.names["pkg_config"] = "x264"