| Pull the new libvpx checkout into external/libvpx/libvpx: |
| $ cd external/libvpx/ |
| $ rm -rf libvpx |
| $ git clone http://git.chromium.org/webm/libvpx.git |
| $ cd libvpx |
| $ git checkout <branch> |
| $ rm -rf .git* |
| |
| Enter the subdirectory for the relevant platform. For example, armv7-neon for |
| armv7 targets with neon extensions. We disable many features. Some for |
| functional reasons and some for aesthetic ones. |
| |
| Functional: |
| --force-target=$TARGET |
| The "Android" support in libvpx is targeted at the NDK and does not yet |
| include support for architectures such as MIPS. However, we can still generate |
| the necessary files for them. |
| --disable-runtime-cpu-detect |
| --disable-neon |
| The platform knows at build time what extensions are supported. |
| --sdk-path=$SDK_PATH |
| For configuration we do some compiler tests. It is much easier to accept them |
| than to work around them. This uses the compilers included in the NDK. |
| --enable-realtime-only |
| Reduce binary size when building the encoder. |
| |
| Aesthetic: |
| --disable-examples |
| --disable-docs |
| Skip unnecessary extra makefiles. |
| |
| Example: |
| $ cd external/libvpx/armv7a |
| $ ../libvpx/configure --target=armv7-android-gcc --disable-runtime-cpu-detect \ |
| --disable-neon --sdk-path=$ANDROID_NDK_ROOT --disable-vp8-encoder \ |
| --disable-examples --disable-docs |
| |
| Run 'make libvpx_srcs.txt' |
| This will generate a file listing all of the required sources. It will also |
| generate vpx_rtcd.h and vpx_version.h |
| |
| Remove the unused files leaving only: |
| libvpx_srcs.txt |
| vpx_config.c |
| vpx_config.h |
| vpx_rtcd.h |
| vpx_version.h |
