libyuv/BUILD.bazel

# Copyright 2026 The LibYuv Project Authors. All rights reserved.
#
# Description:
#   The libyuv package provides implementation yuv image conversion, rotation
#   and scaling.

load("@bazel_skylib//lib:selects.bzl", "selects")
load(":libyuv.bzl", "libyuv_hdrs", "libyuv_neon_srcs", "libyuv_srcs", "libyuv_sve_srcs", "libyuv_test_srcs")

# Detect if we are in Google's internal repository (where source files are
# under files/) or open source (where source files are at the root).
PREFIX = "files/" if len(native.glob(["files/source/*.cc"])) > 0 else ""

# We support NEON for all arm processors, as we only support ARMv7a+.
SUPPORTS_NEON_COPTS = [
    "-DLIBYUV_NEON",
]

# ARMv7a requires that we explicitly enable NEON. arm64 enables it implicitly.
ENABLE_NEON_COPTS = [
    "-mfpu=neon",
]

ENABLE_NEON64_COPTS = [
    "-march=armv8-a+dotprod+i8mm",
]

NEON_COPTS = select({
    "@platforms//cpu:armv7": ENABLE_NEON_COPTS + SUPPORTS_NEON_COPTS,
    "@platforms//cpu:aarch64": ENABLE_NEON64_COPTS + SUPPORTS_NEON_COPTS,
    "//conditions:default": [],
})

SUPPORTS_SVE_COPTS = [
    "-DLIBYUV_SVE",
]

ENABLE_SVE_COPTS = [
    "-march=armv9-a+i8mm+sve2",
]

SVE_COPTS = select({
    "@platforms//cpu:aarch64": ENABLE_SVE_COPTS + SUPPORTS_SVE_COPTS,
    "//conditions:default": [],
})

PLATFORM_COPTS = select({
    "@platforms//os:android": ["-DHAVE_JPEG"],
    "@platforms//os:linux": ["-DHAVE_JPEG"],
    "@platforms//os:windows": ["-DHAVE_JPEG"],
    "@platforms//os:macos": ["-DHAVE_JPEG"],
    "//conditions:default": [],
}) + [
    "-DLIBYUV_DISABLE_SME",
    "-DLIBYUV_USE_ABSL_FLAGS",
    "-DGOOGLE_COMMANDLINEFLAGS_FULL_API",
]

ALL_COPTS = PLATFORM_COPTS

ALL_NEON_COPTS = NEON_COPTS + PLATFORM_COPTS

ALL_SVE_COPTS = SVE_COPTS + PLATFORM_COPTS

NEON_DEPS = select({
    "@platforms//cpu:armv7": [":libyuv_neon_impl"],
    "@platforms//cpu:aarch64": [":libyuv_neon_impl"],
    "//conditions:default": [],
})

SVE_DEPS = select({
    "@platforms//cpu:aarch64": [":libyuv_sve_impl"],
    "//conditions:default": [],
})

PLATFORM_DEPS = select({
    "@platforms//os:android": ["@libjpeg_turbo//:jpeg"],
    "@platforms//os:linux": ["@libjpeg_turbo//:jpeg"],
    "@platforms//os:windows": ["@libjpeg_turbo//:jpeg"],
    "@platforms//os:macos": ["@libjpeg_turbo//:jpeg"],
    "//conditions:default": [],
})

ALL_DEPS = NEON_DEPS + SVE_DEPS + PLATFORM_DEPS

cc_library(
    name = "libyuv",
    hdrs = [
        PREFIX + "include/libyuv.h",
        # Headers included by libyuv.h.
        PREFIX + "include/libyuv/basic_types.h",
        PREFIX + "include/libyuv/compare.h",
        PREFIX + "include/libyuv/convert.h",
        PREFIX + "include/libyuv/convert_argb.h",
        PREFIX + "include/libyuv/convert_from.h",
        PREFIX + "include/libyuv/convert_from_argb.h",
        PREFIX + "include/libyuv/cpu_id.h",
        PREFIX + "include/libyuv/mjpeg_decoder.h",
        PREFIX + "include/libyuv/planar_functions.h",
        PREFIX + "include/libyuv/rotate.h",
        PREFIX + "include/libyuv/rotate_argb.h",
        PREFIX + "include/libyuv/row.h",  # Bug 553148013: Should be private.
        PREFIX + "include/libyuv/scale.h",
        PREFIX + "include/libyuv/scale_argb.h",
        PREFIX + "include/libyuv/scale_rgb.h",
        PREFIX + "include/libyuv/scale_uv.h",
        PREFIX + "include/libyuv/version.h",
        PREFIX + "include/libyuv/video_common.h",
        # Headers included by libyuv/row.h.
        PREFIX + "include/libyuv/cpu_support.h",  # Bug 553148013: Should be private.
    ],
    strip_include_prefix = PREFIX + "include",
    visibility = ["//visibility:public"],
    deps = [":libyuv_impl"],
)

cc_library(
    name = "libyuv_impl",
    srcs = libyuv_srcs(PREFIX),
    hdrs = libyuv_hdrs(PREFIX),
    copts = ALL_COPTS + selects.with_or({
        (
            "@platforms//os:android",
            "@platforms//os:ios",
            "@platforms//os:tvos",
            "@platforms//os:windows",
            "@platforms//os:macos",
        ): [],
        "//conditions:default": [
            "-fomit-frame-pointer",
        ],
    }) + selects.with_or({
        (
            "@platforms//os:android",
            "@platforms//os:ios",
            "@platforms//os:tvos",
        ): ["-O2"],
        "//conditions:default": [],
    }),
    includes = [PREFIX + "include"],
    deps = ALL_DEPS,
    alwayslink = 1,
)

cc_library(
    name = "libyuv_neon_impl",
    srcs = libyuv_neon_srcs(PREFIX),
    copts = ALL_NEON_COPTS,
    includes = [PREFIX + "include"],
    visibility = ["//visibility:private"],
    alwayslink = 1,
)

cc_library(
    name = "libyuv_sve_impl",
    srcs = libyuv_sve_srcs(PREFIX),
    copts = ALL_SVE_COPTS,
    includes = [PREFIX + "include"],
    visibility = ["//visibility:private"],
    alwayslink = 1,
)

cc_test(
    name = "libyuv_test",
    srcs = libyuv_test_srcs(PREFIX),
    copts = ALL_COPTS + [
        "-Wno-unused-variable",
    ],
    visibility = ["//visibility:public"],
    deps = [
        ":libyuv",
        "@com_google_googletest//:gtest_main",
        "@com_google_absl//absl/flags:flag",
        "@com_google_absl//absl/flags:parse",
    ],
)

cc_library(
    name = "psnr_lib",
    srcs = [PREFIX + "util/psnr.cc"],
    hdrs = [PREFIX + "util/psnr.h"],
    copts = PLATFORM_COPTS,
    visibility = ["//visibility:private"],
)

cc_library(
    name = "ssim_lib",
    srcs = [PREFIX + "util/ssim.cc"],
    hdrs = [PREFIX + "util/ssim.h"],
    visibility = ["//visibility:private"],
)

cc_binary(
    name = "psnr",
    srcs = [PREFIX + "util/psnr_main.cc"],
    copts = PLATFORM_COPTS + [
        "-Wframe-larger-than=64000",
    ],
    deps = [
        ":libyuv",
        ":psnr_lib",
        ":ssim_lib",
    ],
)

cc_binary(
    name = "i444tonv12_eg",
    srcs = [PREFIX + "util/i444tonv12_eg.cc"],
    visibility = ["//visibility:public"],
    deps = [
        ":libyuv",
    ],
)

cc_binary(
    name = "cpuid",
    srcs = [PREFIX + "util/cpuid.c"],
    visibility = ["//visibility:public"],
    deps = [
        ":libyuv",
    ],
)

cc_binary(
    name = "yuvconstants",
    srcs = [PREFIX + "util/yuvconstants.c"],
    visibility = ["//visibility:public"],
    deps = [
        ":libyuv",
    ],
)

cc_binary(
    name = "yuvconvert",
    srcs = [PREFIX + "util/yuvconvert.cc"],
    visibility = ["//visibility:public"],
    deps = [
        ":libyuv",
    ],
)