android10/frameworks/av/media/libeffects/downmix/Android.bp

// Multichannel downmix effect library
cc_library_shared {
    name: "libdownmix",

    vendor: true,
    srcs: ["EffectDownmix.c"],

    shared_libs: [
        "libcutils",
        "liblog",
    ],

    relative_install_path: "soundfx",

    cflags: [
        "-DBUILD_FLOAT",
        "-fvisibility=hidden",
        "-Wall",
        "-Werror",
    ],

    header_libs: [
        "libaudioeffects",
        "libhardware_headers",
    ],
    static_libs: ["libaudioutils" ],
}