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Add Bazel build support
Change-Id: Idf205997010a95f975dbd347e268e36c2072f797 Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/7745020 Reviewed-by: Wan-Teh Chang <wtc@google.com> Reviewed-by: richard winterton <rrwinterton@gmail.com> Commit-Queue: Frank Barchard <fbarchard@chromium.org>
This commit is contained in:
Frank Barchard
libyuv-scoped@luci-project-accounts.iam.gserviceaccount.com
parent
e034c41661
commit
0d8494abc0
217
BUILD.bazel
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217
BUILD.bazel
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# Copyright 2026 The LibYuv Project Authors. All rights reserved.
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#
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# Description:
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# The libyuv package provides implementation yuv image conversion, rotation
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# and scaling.
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load("@bazel_skylib//lib:selects.bzl", "selects")
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load(":libyuv.bzl", "libyuv_hdrs", "libyuv_neon_srcs", "libyuv_srcs", "libyuv_sve_srcs", "libyuv_test_srcs")
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# Detect if we are in Google's internal repository (where source files are
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# under files/) or open source (where source files are at the root).
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PREFIX = "files/" if len(native.glob(["files/source/*.cc"])) > 0 else ""
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# We support NEON for all arm processors, as we only support ARMv7a+.
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SUPPORTS_NEON_COPTS = [
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"-DLIBYUV_NEON",
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]
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# ARMv7a requires that we explicitly enable NEON. arm64 enables it implicitly.
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ENABLE_NEON_COPTS = [
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"-mfpu=neon",
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]
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ENABLE_NEON64_COPTS = [
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"-march=armv8-a+dotprod+i8mm",
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]
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NEON_COPTS = select({
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"@platforms//cpu:armv7": ENABLE_NEON_COPTS + SUPPORTS_NEON_COPTS,
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"@platforms//cpu:aarch64": ENABLE_NEON64_COPTS + SUPPORTS_NEON_COPTS,
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"//conditions:default": [],
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})
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SUPPORTS_SVE_COPTS = [
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"-DLIBYUV_SVE",
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]
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ENABLE_SVE_COPTS = [
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"-march=armv9-a+i8mm+sve2",
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]
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SVE_COPTS = select({
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"@platforms//cpu:aarch64": ENABLE_SVE_COPTS + SUPPORTS_SVE_COPTS,
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"//conditions:default": [],
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})
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PLATFORM_COPTS = select({
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"@platforms//os:android": ["-DHAVE_JPEG"],
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"@platforms//os:linux": ["-DHAVE_JPEG"],
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"@platforms//os:windows": ["-DHAVE_JPEG"],
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"@platforms//os:macos": ["-DHAVE_JPEG"],
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"//conditions:default": [],
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}) + [
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"-DLIBYUV_DISABLE_SME",
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"-DLIBYUV_USE_ABSL_FLAGS",
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"-DGOOGLE_COMMANDLINEFLAGS_FULL_API",
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]
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ALL_COPTS = PLATFORM_COPTS
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ALL_NEON_COPTS = NEON_COPTS + PLATFORM_COPTS
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ALL_SVE_COPTS = SVE_COPTS + PLATFORM_COPTS
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NEON_DEPS = select({
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"@platforms//cpu:armv7": [":libyuv_neon_impl"],
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"@platforms//cpu:aarch64": [":libyuv_neon_impl"],
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"//conditions:default": [],
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})
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SVE_DEPS = select({
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"@platforms//cpu:aarch64": [":libyuv_sve_impl"],
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"//conditions:default": [],
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})
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PLATFORM_DEPS = select({
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"@platforms//os:android": ["@libjpeg_turbo//:jpeg"],
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"@platforms//os:linux": ["@libjpeg_turbo//:jpeg"],
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"@platforms//os:windows": ["@libjpeg_turbo//:jpeg"],
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"@platforms//os:macos": ["@libjpeg_turbo//:jpeg"],
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"//conditions:default": [],
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})
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ALL_DEPS = NEON_DEPS + SVE_DEPS + PLATFORM_DEPS
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cc_library(
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name = "libyuv",
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hdrs = native.glob([PREFIX + "include/**/*.h"]),
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strip_include_prefix = PREFIX + "include",
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visibility = ["//visibility:public"],
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deps = [":libyuv_impl"],
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)
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cc_library(
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name = "libyuv_impl",
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srcs = libyuv_srcs(PREFIX),
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hdrs = libyuv_hdrs(PREFIX),
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copts = ALL_COPTS + selects.with_or({
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(
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"@platforms//os:android",
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"@platforms//os:ios",
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"@platforms//os:tvos",
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"@platforms//os:windows",
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"@platforms//os:macos",
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): [],
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"//conditions:default": [
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"-fomit-frame-pointer",
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],
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}) + selects.with_or({
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(
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"@platforms//os:android",
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"@platforms//os:ios",
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"@platforms//os:tvos",
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): ["-O2"],
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"//conditions:default": [],
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}),
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includes = [PREFIX + "include"],
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deps = ALL_DEPS,
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alwayslink = 1,
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)
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cc_library(
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name = "libyuv_neon_impl",
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srcs = libyuv_neon_srcs(PREFIX),
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copts = ALL_NEON_COPTS,
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includes = [PREFIX + "include"],
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visibility = ["//visibility:private"],
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alwayslink = 1,
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)
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cc_library(
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name = "libyuv_sve_impl",
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srcs = libyuv_sve_srcs(PREFIX),
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copts = ALL_SVE_COPTS,
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includes = [PREFIX + "include"],
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visibility = ["//visibility:private"],
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alwayslink = 1,
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)
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cc_test(
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name = "libyuv_test",
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srcs = libyuv_test_srcs(PREFIX),
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copts = ALL_COPTS + [
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"-Wno-unused-variable",
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],
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visibility = ["//visibility:public"],
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deps = [
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":libyuv",
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"@com_google_googletest//:gtest_main",
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"@com_google_absl//absl/flags:flag",
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"@com_google_absl//absl/flags:parse",
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],
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)
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cc_library(
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name = "psnr_lib",
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srcs = [PREFIX + "util/psnr.cc"],
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hdrs = [PREFIX + "util/psnr.h"],
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copts = PLATFORM_COPTS,
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visibility = ["//visibility:private"],
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)
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cc_library(
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name = "ssim_lib",
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srcs = [PREFIX + "util/ssim.cc"],
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hdrs = [PREFIX + "util/ssim.h"],
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visibility = ["//visibility:private"],
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)
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cc_binary(
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name = "psnr",
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srcs = [PREFIX + "util/psnr_main.cc"],
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copts = PLATFORM_COPTS + [
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"-Wframe-larger-than=64000",
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],
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deps = [
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":libyuv",
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":psnr_lib",
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":ssim_lib",
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],
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)
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cc_binary(
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name = "i444tonv12_eg",
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srcs = [PREFIX + "util/i444tonv12_eg.cc"],
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visibility = ["//visibility:public"],
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deps = [
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":libyuv",
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],
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)
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cc_binary(
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name = "cpuid",
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srcs = [PREFIX + "util/cpuid.c"],
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visibility = ["//visibility:public"],
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deps = [
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":libyuv",
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],
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)
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cc_binary(
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name = "yuvconstants",
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srcs = [PREFIX + "util/yuvconstants.c"],
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visibility = ["//visibility:public"],
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deps = [
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":libyuv",
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],
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)
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cc_binary(
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name = "yuvconvert",
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srcs = [PREFIX + "util/yuvconvert.cc"],
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visibility = ["//visibility:public"],
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deps = [
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":libyuv",
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],
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)
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14
WORKSPACE.bazel
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14
WORKSPACE.bazel
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workspace(name = "libyuv")
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android_sdk_repository(
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name = "androidsdk",
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# Bazel will automatically use the ANDROID_HOME environment variable.
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)
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android_ndk_repository(
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name = "androidndk",
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# Bazel will automatically use the ANDROID_NDK_HOME environment variable.
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)
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# Optional: If you need to fetch specific dependencies (e.g., GoogleTest, libjpeg-turbo)
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# you can define them here using http_archive.
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@ -43,6 +43,39 @@ To get just the source (not buildable):
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## Building the Library and Unittests
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### Bazel
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Libyuv can be built using [Bazel](https://bazel.build/).
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#### Android Prerequisites
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To build for Android using Bazel, you must have the Android SDK and NDK installed. Bazel will look for the following environment variables to locate them:
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* `ANDROID_HOME`: Set this to the path of your Android SDK.
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* `ANDROID_NDK_HOME`: Set this to the path of your Android NDK.
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Ensure these variables are set before running the Bazel Android build commands.
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**Android arm64:**
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bazel build -c opt --config=android_arm64 //:libyuv_test
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# Or, specifying standard open-source flags (if NDK is set up in workspace):
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bazel build -c opt --cpu=arm64-v8a --crosstool_top=//external:android/crosstool //:libyuv_test
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**Linux x86_64:**
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bazel build -c opt //:libyuv_test
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# Or, specifying a specific CPU architecture:
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bazel build -c opt --cpu=haswell //:libyuv_test
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Additional commonly used compiler options can be passed to Bazel via `--copt`:
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bazel build -c opt --config=android_arm64 \
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--copt=-DLIBYUV_UNLIMITED_DATA \
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--copt=-DLIBYUV_BIT_EXACT=1 \
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--copt=-DENABLE_ROW_TESTS \
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//:libyuv_test
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### Windows
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gn gen out\Release "--args=is_debug=false target_cpu=\"x64\""
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@ -251,6 +284,20 @@ See also https://www.ccoderun.ca/programming/2015-12-20_CrossCompiling/index.htm
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## Running Unittests
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### Bazel
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You can run the tests using Bazel's `test` command. This will build and run the test in an isolated environment:
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bazel test -c opt //:libyuv_test
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To pass specific arguments to the test binary (like a gtest filter), use `--test_arg`:
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bazel test -c opt //:libyuv_test --test_arg=--gtest_filter="*" --test_output=all
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Alternatively, you can run the compiled binary directly from the `bazel-bin` directory:
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./bazel-bin/libyuv_test --gtest_filter="*"
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### Windows
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out\Release\libyuv_unittest.exe --gtest_catch_exceptions=0 --gtest_filter="*"
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43
libyuv.bzl
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43
libyuv.bzl
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# Copyright 2026 The LibYuv Project Authors. All rights reserved.
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#
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# Shared target definitions for Bazel and Blaze builds.
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def libyuv_srcs(prefix = ""):
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return native.glob(
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[
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prefix + "source/*.cc",
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prefix + "include/libyuv/*.h",
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],
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exclude = [
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prefix + "source/*neon*.cc",
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prefix + "source/*sve*.cc",
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prefix + "source/*sme*.cc",
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],
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)
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def libyuv_hdrs(prefix = ""):
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return [
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prefix + "include/libyuv/compare.h",
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prefix + "include/libyuv/convert.h",
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prefix + "include/libyuv/convert_from_argb.h",
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prefix + "include/libyuv/cpu_id.h",
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prefix + "include/libyuv/row.h",
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]
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def libyuv_neon_srcs(prefix = ""):
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return native.glob([
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prefix + "source/*neon*.cc",
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prefix + "include/libyuv/*.h",
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])
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def libyuv_sve_srcs(prefix = ""):
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return native.glob([
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prefix + "source/*sve*.cc",
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prefix + "include/libyuv/*.h",
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])
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def libyuv_test_srcs(prefix = ""):
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return native.glob([
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prefix + "unit_test/*.cc",
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prefix + "unit_test/*.h",
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])
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