1 Pull the new libvpx checkout into external/libvpx/libvpx: 2 $ cd external/libvpx/ 3 $ rm -rf libvpx 4 $ git clone http://git.chromium.org/webm/libvpx.git 5 $ cd libvpx 6 $ git checkout <branch> 7 $ rm -rf .git* 8 9 Enter the subdirectory for the relevant platform. For example, armv7-neon for 10 armv7 targets with neon extensions. We disable many features. Some for 11 functional reasons and some for aesthetic ones. 12 13 Functional: 14 --force-target=$TARGET 15 The "Android" support in libvpx is targeted at the NDK and does not yet 16 include support for architectures such as MIPS. However, we can still generate 17 the necessary files for them. 18 --disable-runtime-cpu-detect 19 --disable-neon 20 The platform knows at build time what extensions are supported. 21 --sdk-path=$SDK_PATH 22 For configuration we do some compiler tests. It is much easier to accept them 23 than to work around them. This uses the compilers included in the NDK. 24 --enable-realtime-only 25 Reduce binary size when building the encoder. 26 27 Aesthetic: 28 --disable-examples 29 --disable-docs 30 Skip unnecessary extra makefiles. 31 32 Example: 33 $ cd external/libvpx/armv7a 34 $ ../libvpx/configure --target=armv7-android-gcc --disable-runtime-cpu-detect \ 35 --disable-neon --sdk-path=$ANDROID_NDK_ROOT --disable-vp9-encoder \ 36 --disable-examples --disable-docs 37 38 Run 'make libvpx_srcs.txt' 39 This will generate a file listing all of the required sources. It will also 40 generate vpx_rtcd.h and vpx_version.h 41 42 Remove the unused files leaving only: 43 libvpx_srcs.txt 44 vpx_config.c 45 vpx_config.h 46 vpx_scale_rtcd.h 47 vp8_rtcd.h 48 vp9_rtcd.h 49 vpx_version.h 50
