Caffe-Android-Lib (OpenCL)

Goal

Porting caffe OpenCL to android platform

Support

• Up-to-date caffe
• CPU & GPU
• No support for hdf5

Build

On local machine

Tested with XiaoMi 5, Android NDK r15c and cmake 3.5.1 on Ubuntu 16.06

Install NDK r15c

wget https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip
sudo unzip android-ndk-r15c-linux-x86_64.zip -d /etc

Download target libOpenCL.so from your Andriod device by adb. Normally under /vendor/lib64/libOpenCL.so

adb pull /vendor/lib64/libOpenCL.so  ~/

Start building

git clone --recursive https://github.com/quhezheng/caffe-android-lib.git
cd caffe-android-lib
export ANDROID_ABI=arm64-v8a
export NDK_ROOT=/etc/android-ndk-r15c  (or /your/path/to/ndk)
cp ~/libOpenCL.so android_lib/opencl-android/lib
./build.sh

There it will be *.so *.a libaray under caffe-android-lib/caffe/build/lib

NOTE: OpenBLAS

OpenBLAS is the only supported BLAS choice now, and the supported ABIs are the following:

• armeabi
• armeabi-v7a
• arm64-v8a (default)
• x86
• x86_64

Issues

Any comments, issues or PRs are welcomed. Thanks.

TODO

• Integrate using CMake's ExternalProject
• Support HDF5

Caffe-Android-Demo (App)

Goal

Demo Andriod app to run caffe on cell phone's GPU.

Support

• App to load caffe demo model to recognize picture (Camera)
• CPU & GPU
• Debug caffe C++ code on cell phone (PC as host)
• XiaoMi 5 (Tested by this repository)

Setup & Build

Link caffe native C++ code to Android project

cd caffe-android-lib/caffe-android-demo/app/caffe-opencl
./link.sh

Android studio 2.3.3

cd ~/Downloads
wget https://dl.google.com/dl/android/studio/ide-zips/2.3.3.0/android-studio-ide-162.4069837-linux.zip
sudo unzip android-studio-ide-162.4069837-linux.zip -d /etc

• start Android studio

cd /etc/android-studio/bin
./studio.sh

• click 'import project(Eclipse ADT, Gradle, etc.)', brown to 'caffe-android-lib/caffe-android-demo', click 'OK' to open the project. Wait a few minutes to finish gradle building...

• Build the project by menu 'Build -->Make Project'

• Collect *.so files into target lib

cd YOUR/PATH/OF/caffe-android-lib/caffe-android-demo/app
cp .externalNativeBuild/cmake/release/arm64-v8a/lib/libcaffe.so src/main/jniLibs
cp .externalNativeBuild/cmake/release/arm64-v8a/lib/libcaffe_jni.so src/main/jniLibs

Deploye Caffe Model on Cell Phone

Connect USB cable between your PC and Cell phone

# Download googlenet
cd YOUR/PATH/OF/caffe-android-lib/caffe
./scripts/download_model_binary.py models/bvlc_googlenet/
# push things to your device
adb shell mkdir -p /sdcard/caffe_mobile/
adb push models/bvlc_googlenet/ /sdcard/caffe_mobile/bvlc_googlenet/

Debug C++

• Connect USB cable between your PC and Cell phone
• Setup a break point in a C++ code file from inside Android studio. Click 'Debug' buton in Android studio...