1f66f30ccd
Issue: #1157 ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=164434768
79 lines
2.4 KiB
Markdown
79 lines
2.4 KiB
Markdown
# ExoPlayer VP9 extension #
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## Description ##
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The VP9 extension is a [Renderer][] implementation that helps you bundle libvpx
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(the VP9 decoding library) into your app and use it along with ExoPlayer to play
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VP9 video on Android devices.
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[Renderer]: https://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer2/Renderer.html
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## Build instructions ##
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To use this extension you need to clone the ExoPlayer repository and depend on
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its modules locally. Instructions for doing this can be found in ExoPlayer's
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[top level README][]. In addition, it's necessary to build the extension's
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native components as follows:
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* Set the following environment variables:
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```
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cd "<path to exoplayer checkout>"
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EXOPLAYER_ROOT="$(pwd)"
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VP9_EXT_PATH="${EXOPLAYER_ROOT}/extensions/vp9/src/main"
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```
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* Download the [Android NDK][] and set its location in an environment variable:
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```
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NDK_PATH="<path to Android NDK>"
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```
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* Fetch libvpx and libyuv:
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```
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cd "${VP9_EXT_PATH}/jni" && \
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git clone https://chromium.googlesource.com/webm/libvpx libvpx && \
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git clone https://chromium.googlesource.com/libyuv/libyuv libyuv
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```
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* Checkout the appropriate branches of libvpx and libyuv (the scripts and
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makefiles bundled in this repo are known to work only at these versions of the
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libraries - we will update this periodically as newer versions of
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libvpx/libyuv are released):
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```
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cd "${VP9_EXT_PATH}/jni/libvpx" && \
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git checkout tags/v1.6.1 -b v1.6.1 && \
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cd "${VP9_EXT_PATH}/jni/libyuv" && \
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git checkout 996a2bbd
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```
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* Run a script that generates necessary configuration files for libvpx:
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```
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cd ${VP9_EXT_PATH}/jni && \
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./generate_libvpx_android_configs.sh "${NDK_PATH}"
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```
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* Build the JNI native libraries from the command line:
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```
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cd "${VP9_EXT_PATH}"/jni && \
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${NDK_PATH}/ndk-build APP_ABI=all -j4
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```
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[top level README]: https://github.com/google/ExoPlayer/blob/release-v2/README.md
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[Android NDK]: https://developer.android.com/tools/sdk/ndk/index.html
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## Notes ##
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* Every time there is a change to the libvpx checkout:
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* Android config scripts should be re-generated by running
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`generate_libvpx_android_configs.sh`
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* Clean and re-build the project.
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* If you want to use your own version of libvpx or libyuv, place it in
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`${VP9_EXT_PATH}/jni/libvpx` or `${VP9_EXT_PATH}/jni/libyuv` respectively. But
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please note that `generate_libvpx_android_configs.sh` and the makefiles need
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to be modified to work with arbitrary versions of libvpx and libyuv.
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