liduanjun / android_vendor_google_emu-x86

android_vendor_google_emu-x86

This project provides scripts to extract (proprietary) files from the Android emulator images, for use in x86-based Android installations.

These files (mainly binaries) complement what is available in AOSP, and provide the following functionality:

• Widevine: DRM system from Google used in certain media streaming apps like Netflix. ChromeOS contains a HIDL HAL implementation that provides security level L3 (software decoding).
• libndk_translation: ARM on x86 native bridge by Google. Allows running apps built only for ARM platforms on x86-based devices.

Currently, this project extracts files suitable for Android 11.0 (R).

Usage

Extracting from Google Emulator images

This repository contains build scripts for the following two flashable ZIPs:

• Widevine (DRM used in some streaming apps)
• libndk_translation (used to run ARM apps on x86)

There are no pre-built ZIP packages provided by this project. However, building the ZIP should always produce the same file. Therefore its integrity can be verified using the checksums available in the release section.

Requirements

• Linux (e.g. Debian, Ubuntu, ...)
• curl or wget, rsync, zip, unzip
  • Debian/Ubuntu: sudo apt install curl rsync zip unzip binwalk (usually installed by default) Also need to install 7z from 7-zip.org

Building

1. Download the Source code as .tar.gz from the release section and unpack it.

2. Open a terminal and cd into your project folder, then run:

   git clone https://gitlab.com/android-generic/android_vendor_google_emu-x86 vendor/google/emu-x86

3. Then we need to run the update script

   $ . vendor/google/emu-x86/update.sh x86_64

   This will download the NDK Emulator image and extract the needed files from it for libndk & widevine.

Make files

board and target contain make files that can be used to bundle the proprietary files in an Android build.

• libndk_translaton: board/native_bridge_arm_on_x86.mk must be included from BoardConfig.mk even if a native bridge should be optionally installed. It configures the build system to build additional code needed to run ARM apps.

  • BoardConfig.mk: Always required.

    -include vendor/google/emu-x86/board/native_bridge_arm_on_x86.mk

  • device.mk: Do not advertise support for ARM ABI by default (for use when libndk_translation is not bundled):

    $(call inherit-product-if-exists, vendor/google/emu-x86/target/native_bridge_arm_on_x86.mk)

    Optional: Bundle libndk_translation directly with the Android build:

    $(call inherit-product-if-exists, vendor/google/emu-x86/target/libndk_translation.mk)

• Widevine: device.mk: Bundle Widevine directly with the Android build.

  $(call inherit-product-if-exists, vendor/google/emu-x86/target/widevine.mk)

License

Please see LICENSE.