[DO-971] ffmpeg recipe with requirements (!9)

Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>
Reviewed-on: https://git.avroid.tech/Conan/conan_build/pulls/9

recipes/libx264/all/conandata.yml

@@ -0,0 +1,7 @@
+sources:
+  "cci.20240224":
+    url: "https://nexus.avroid.tech/repository/all-raw-proxy-code_videolan_org/videolan/x264/-/archive/7241d020118bb09cc0ad119d7bc9f630a1caad10/x264-7241d020118bb09cc0ad119d7bc9f630a1caad10.tar.bz2"
+    sha256: "5417c167a69cc19db044c227163f9b9b1dface9fca361a3e83d5417f8e304dd6"
+  "cci.20220602":
+    url: "https://nexus.avroid.tech/repository/all-raw-proxy-code_videolan_org/videolan/x264/-/archive/baee400fa9ced6f5481a728138fed6e867b0ff7f/x264-baee400fa9ced6f5481a728138fed6e867b0ff7f.tar.bz2"
+    sha256: "ce6623b8b289765daee04a297c2fd1a293cb2565a1749c76d66c8d72c7ddc1ab"

recipes/libx264/all/conanfile.py

@@ -0,0 +1,187 @@
+from conan import ConanFile
+from conan.tools.apple import is_apple_os, XCRun, fix_apple_shared_install_name
+from conan.tools.build import cross_building
+from conan.tools.env import Environment, VirtualBuildEnv
+from conan.tools.files import copy, rename, get, rmdir
+from conan.tools.gnu import Autotools, AutotoolsToolchain
+from conan.tools.layout import basic_layout
+from conan.tools.microsoft import is_msvc, unix_path
+import os
+
+required_conan_version = ">=1.57.0"
+
+
+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 = ("video", "encoding")
+    license = "GPL-2.0"
+
+    settings = "os", "arch", "compiler", "build_type"
+    options = {
+        "shared": [True, False],
+        "fPIC": [True, False],
+        "bit_depth": [8, 10, "all"],
+        "with_opencl": [True, False],
+        "with_asm": [True, False]
+    }
+    # The project by default enables opencl and asm, it can be opted-out
+    default_options = {
+        "shared": False,
+        "fPIC": True,
+        "bit_depth": "all",
+        "with_opencl": True,
+        "with_asm": True
+    }
+
+    def config_options(self):
+        if self.settings.os == "Windows":
+            del self.options.fPIC
+
+    def configure(self):
+        if self.options.shared:
+            self.options.rm_safe("fPIC")
+        self.settings.rm_safe("compiler.libcxx")
+        self.settings.rm_safe("compiler.cppstd")
+
+    @property
+    def _with_nasm(self):
+        return self.settings.arch in ("x86", "x86_64")
+
+    def layout(self):
+        basic_layout(self, src_folder="src")
+
+    def build_requirements(self):
+        if self._with_nasm:
+            self.tool_requires("nasm/[>=2.15.05]")
+        if self.settings_build.os == "Windows":
+            self.win_bash = True
+            if not self.conf.get("tools.microsoft.bash:path", check_type=str):
+                self.tool_requires("msys2/cci.latest")
+
+    def source(self):
+        get(self, **self.conan_data["sources"][self.version], strip_root=True)
+
+    def generate(self):
+        tc = AutotoolsToolchain(self)
+
+        extra_asflags = []
+        extra_cflags = []
+        extra_ldflags = []
+        args = {
+            "--bit-depth": self.options.bit_depth,
+            "--disable-cli": "",
+            "--sbindir": None,          # Not understood by configure
+            "--oldincludedir": None     # Not understood by configure
+        }
+        args["--disable-shared"] = None # --disable-shared is not understood
+        if self.options.shared:
+            args["--enable-shared"] = ""
+        else:
+            args["--enable-static"] = ""
+        if not self.options.with_opencl:
+            args["--disable-opencl"] = ""
+        if not self.options.with_asm:
+            args["--disable-asm"] = ""
+        if self.options.get_safe("fPIC", self.settings.os != "Windows"):
+            args["--enable-pic"] = ""
+        if self.settings.build_type == "Debug":
+            args["--enable-debug"] = ""
+
+        if is_apple_os(self) 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["--host"] = "aarch64-apple-darwin"
+            if self.settings.os != "Macos": # TODO not sure why this is != "Macos" ... shouldn't it be == ??
+                xcrun = XCRun(self)
+                platform_flags = ["-isysroot", xcrun.sdk_path]
+                apple_min_version_flag = AutotoolsToolchain(self).apple_min_version_flag
+                if apple_min_version_flag:
+                    platform_flags.append(apple_min_version_flag)
+                extra_asflags.extend(platform_flags)
+                extra_cflags.extend(platform_flags)
+                extra_ldflags.extend(platform_flags)
+
+        if self._with_nasm:
+            env = Environment()
+            env.define("AS", unix_path(self, os.path.join(self.dependencies.build["nasm"].package_folder, "bin", "nasm{}".format(".exe" if self.settings.os == "Windows" else ""))))
+            env.vars(self).save_script("conanbuild_nasm")
+
+        if cross_building(self):
+            if self.settings.os == "Android":
+                buildenv_vars = VirtualBuildEnv(self).vars()
+                ndk_root = self.conf.get("tools.android:ndk_path", buildenv_vars.get("NDK_ROOT"))
+
+                # INFO: Conan package android-ndk does not expose toolchain path. Looks fragile but follows always same for Android NDK
+                build_os = {"Linux": "linux", "Macos": "darwin", "Windows": "windows"}.get(str(self.settings_build.os))
+                toolchain = os.path.join(ndk_root, "toolchains", "llvm", "prebuilt", f"{build_os}-{self.settings_build.arch}")
+
+                sysroot = self.conf.get("tools.build:sysroot", buildenv_vars.get("SYSROOT", f"{toolchain}/sysroot"))
+                # INFO: x264 will look for strings appended to the cross prefix
+                cross_prefix = os.path.join(toolchain, "bin", "llvm-")
+
+                compilers_from_conf = self.conf.get("tools.build:compiler_executables", default={}, check_type=dict)
+
+                args["--build"] = None # --build is not recognized
+                args["--cross-prefix"] = cross_prefix
+                args["--sysroot"] = sysroot
+
+                # the as of ndk does not work well for building libx264
+                env = Environment()
+                cc_as = compilers_from_conf.get("c", buildenv_vars.get("AS", "clang"))
+                env.define("AS", cc_as)
+                env_vars = env.vars(self, scope="build")
+                env_vars.save_script("conanbuild_android")
+
+        if is_msvc(self):
+            env = Environment()
+            env.define("CC", "cl -nologo")
+            env.vars(self).save_script("conanbuild_msvc")
+
+        if is_msvc(self) or self.settings.os in ["iOS", "watchOS", "tvOS"]:
+            # autotools does not know about the msvc and Apple embedded OS canonical name(s)
+            args["--build"] = None
+            args["--host"] = None
+
+        # The finite-math-only optimization has no effect and can cause linking errors
+        # when linked against glibc >= 2.31
+        extra_cflags += ["-fno-finite-math-only"]
+
+        if extra_asflags:
+            args["--extra-asflags"] = " ".join(extra_asflags)
+        if extra_cflags:
+            args["--extra-cflags"] = " ".join(extra_cflags)
+        if extra_ldflags:
+            args["--extra-ldflags"] = " ".join(extra_ldflags)
+        tc.update_configure_args(args)
+        tc.generate()
+
+    def build(self):
+        autotools = Autotools(self)
+        autotools.configure()
+        autotools.make()
+
+    def package(self):
+        copy(self, pattern="COPYING", src=self.source_folder, dst=os.path.join(self.package_folder, "licenses"))
+        autotools = Autotools(self)
+        autotools.install()
+        rmdir(self, os.path.join(self.package_folder, "lib", "pkgconfig"))
+        if is_msvc(self):
+            ext = ".dll.lib" if self.options.shared else ".lib"
+            rename(self, os.path.join(self.package_folder, "lib", f"libx264{ext}"),
+                         os.path.join(self.package_folder, "lib", "x264.lib"))
+        fix_apple_shared_install_name(self)
+
+    def package_info(self):
+        self.cpp_info.set_property("pkg_config_name", "x264")
+        self.cpp_info.libs = ["x264"]
+        if is_msvc(self) 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"])

recipes/libx264/all/test_package/CMakeLists.txt

@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.1)
+project(test_package LANGUAGES C)
+
+find_package(libx264 REQUIRED CONFIG)
+
+add_executable(${PROJECT_NAME} test_package.c)
+target_link_libraries(${PROJECT_NAME} PRIVATE libx264::libx264)

recipes/libx264/all/test_package/conanfile.py

@@ -0,0 +1,26 @@
+from conan import ConanFile
+from conan.tools.build import can_run
+from conan.tools.cmake import cmake_layout, CMake
+import os
+
+
+class TestPackageConan(ConanFile):
+    settings = "os", "arch", "compiler", "build_type"
+    generators = "CMakeDeps", "CMakeToolchain", "VirtualRunEnv"
+    test_type = "explicit"
+
+    def layout(self):
+        cmake_layout(self)
+
+    def requirements(self):
+        self.requires(self.tested_reference_str)
+
+    def build(self):
+        cmake = CMake(self)
+        cmake.configure()
+        cmake.build()
+
+    def test(self):
+        if can_run(self):
+            bin_path = os.path.join(self.cpp.build.bindirs[0], "test_package")
+            self.run(bin_path, env="conanrun")

recipes/libx264/all/test_package/test_package.c

@@ -0,0 +1,16 @@
+#include <stdint.h>
+#include "x264.h"
+
+#include <stdlib.h>
+
+int main()
+{
+    x264_param_t preset;
+    x264_t *encoder;
+    x264_param_default_preset(&preset, "ultrafast", "zerolatency");
+    preset.i_width = 640;
+    preset.i_height = 480;
+    encoder = x264_encoder_open(&preset);
+    x264_encoder_close(encoder);
+    return EXIT_SUCCESS;
+}