This project is JACK Audio Connection Kit for Android. (See also http://jackaudio.org/)

• Runs on latest android 4.4.2 platform
• Based on latest official JACK2(jack-1.9.9.5)
• Support both ALSA and OpenSLES driver
• Support emulator

Samsung's Professional Audio SDK was based on JACK and is part of Samsung Mobile SDK. For more information, visit http://developer.samsung.com/samsung-mobile-sdk.

Notice : Source code was retrieved from Samsung's Open Source Release Center(OSRC). You can find them from 'MOBILE' menu -> 'Mobile Phone'. This repository(KimJeongYeon/jack2_android) only sync latest jack of OSRC, whereas personal development going on KimJeongYeon/jack2.

I will introduce how to build jack for android emulator using partial build way.

• Requirements
  • Get full source code of android using repo sync. For more information, please visit HERE.
  • 'alsa-lib' is required which was available in SM-N9005_KK_Opensource_Update7.zip.
  • Required root privilege.
• Download source code
  • Download source code from OSRC.
    • Search keyword 'SM-N9005' then download 'SM-N9005_KK_Opensource_Update7.zip' file.
    • unzip SM-N9005_KK_Opensource_Update7.zip, then tar -xvzf Platform.tar.gz.
  • Copy 'jack' and 'alsa-lib' directory from vendor/samsung/common/external to {YOUR_ANDROID_SOURCE_PATH}/vendor/samsung/common/external
    • $ cp -r vendor/samsung/common/external/alsa-lib {YOUR_ANDROID_SOURCE_PATH}/vendor/samsung/common/external
    • $ cp -r vendor/samsung/common/external/jack {YOUR_ANDROID_SOURCE_PATH}/vendor/samsung/common/external
  • Optionally, you able to get & build latest source code from git clone https://github.com/jackaudio/jack2.git.
• Build
  • Environment setup for android build:
    • $ cd {YOUR_ANDROID_SOURCE_PATH}/build
    • $ source envsetup.sh
    • $ lunch aosp_arm-eng
  • Build alsa-lib:
    • $ cd {YOUR_ANDROID_SOURCE_PATH}/vendor/samsung/common/external/alsa_lib
    • $ mma
  • Build jack:
    • $ cd {YOUR_ANDROID_SOURCE_PATH}/vendor/samsung/common/external/jack/android
    • $ mma
  • If build done successfully, binaries placed at '{YOUR_ANDROID_SOURCE_PATH}/out/target/product/generic/system'. Also, prebuilt binaries could be find HERE.

This project supports emulator which based on OpenSL ES as master driver with sound of course.

• Run emulator
  • If you didn't install Android SDK, visit http://developer.android.com/sdk/index.html and install latest one.
  • $ {YOUR_SDK_PATH}/tools/emulator -avd {YOUR\_AVD\_NAME} -wipe-data
• Install binaries
  • From source code build:
    • $ cd {YOUR_ANDROID_SOURCE_PATH}/out/target/product/generic/system
  • From prebuilt binary:
    • $ git clone https://github.com/KimJeongYeon/jack2_android.git
    • $ tar -xvzf ./jack2_android/binaries/jack2_android_binary_XXXXXXXX.tar.gz
    • $ cd jack2_android_binary_xxxxxxxx
  • Push binaries to your emulator device using script:
    • $ copy_target.sh

#!/bin/sh

########################################
# push files to target
#
# how to run in adb shell:
#  > androidshmservice &
#  > jackd -S -v -d opensles -C 0 -P 2 -r 44100 -p 1024 &
#  > jack_simple_client &
########################################

COPY_PATH="."

adb shell mount -o remount,rw /system

adb shell mkdir /data/misc/jack
adb shell mkdir /system/lib/jack

adb push $COPY_PATH/lib/jack/jack_alsa.so /system/lib/jack
adb push $COPY_PATH/lib/jack/jack_dummy.so /system/lib/jack
adb push $COPY_PATH/lib/jack/jack_goldfish.so /system/lib/jack
adb push $COPY_PATH/lib/jack/jack_loopback.so /system/lib/jack
adb push $COPY_PATH/lib/jack/jack_net.so /system/lib/jack
adb push $COPY_PATH/lib/jack/jack_opensles.so /system/lib/jack
adb push $COPY_PATH/lib/jack/netmanager.so /system/lib/jack
adb push $COPY_PATH/lib/jack/profiler.so /system/lib/jack
adb push $COPY_PATH/lib/jack/in.so /system/lib/jack
adb push $COPY_PATH/lib/jack/out.so /system/lib/jack
adb push $COPY_PATH/lib/jack/inprocess.so /system/lib/jack

adb push $COPY_PATH/lib/libasound.so /system/lib
adb push $COPY_PATH/lib/libfluidsynth.so /system/lib
adb push $COPY_PATH/lib/libglib-2.0.so /system/lib
adb push $COPY_PATH/lib/libgthread-2.0.so /system/lib
adb push $COPY_PATH/lib/libjack.so /system/lib
adb push $COPY_PATH/lib/libjackserver.so /system/lib
adb push $COPY_PATH/lib/libjackshm.so /system/lib

adb push $COPY_PATH/bin/androidshmservice /system/bin
adb push $COPY_PATH/bin/shmservicedump /system/bin
adb push $COPY_PATH/bin/shmservicetest /system/bin
adb push $COPY_PATH/bin/jackd /system/bin

adb shell chmod 775 /system/bin/androidshmservice
adb shell chmod 775 /system/bin/shmservicedump
adb shell chmod 775 /system/bin/shmservicetest
adb shell chmod 775 /system/bin/jackd

adb push $COPY_PATH/xbin/jack_* /system/xbin
adb shell chmod 775 /system/xbin/jack_*

run adb shell then,

root@generic:/ # androidshmservice &
[1] 1249
root@generic:/ # 
root@generic:/ # jackd -S -v -d opensles -C 0 -P 2 -r 44100 -p 1024 &
[2] 1253
root@generic:/ # jackdmp 1.9.10
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2014 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details

root@generic:/ # 
root@generic:/ # jack_simple_client &
[3] 1263
root@generic:/ # jack_lsp -c
system:playback_1
   jack_simple_client:output1
system:playback_2
   jack_simple_client:output2
jack_simple_client:output1
   system:playback_1
jack_simple_client:output2
   system:playback_2
this signal is 10