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Add back missing libvpx build instructions

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PiperOrigin-RevId: 242094027
This commit is contained in:
andrewlewis 2019-04-05 10:29:48 +01:00 committed by Oliver Woodman
parent 9471d61183
commit d6244773ec
1 changed files with 20 additions and 0 deletions
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20
extensions/vp9/README.md
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@ -34,6 +34,22 @@ VP9_EXT_PATH="${EXOPLAYER_ROOT}/extensions/vp9/src/main"
NDK_PATH="<path to Android NDK>"
```
* Fetch libvpx:
```
cd "${VP9_EXT_PATH}/jni" && \
git clone https://chromium.googlesource.com/webm/libvpx libvpx
```
* Checkout the appropriate branch of libvpx (the scripts and makefiles bundled
in this repo are known to work only at specific versions of the library - we
will update this periodically as newer versions of libvpx are released):
```
cd "${VP9_EXT_PATH}/jni/libvpx" && \
git checkout tags/v1.7.0 -b v1.7.0
```
* Run a script that generates necessary configuration files for libvpx:
```
@ -58,6 +74,10 @@ ${NDK_PATH}/ndk-build APP_ABI=all -j4
* Android config scripts should be re-generated by running
`generate_libvpx_android_configs.sh`
* Clean and re-build the project.
* If you want to use your own version of libvpx, place it in
`${VP9_EXT_PATH}/jni/libvpx`. Please note that
`generate_libvpx_android_configs.sh` and the makefiles may need to be modified
to work with arbitrary versions of libvpx.
## Using the extension ##