libffplay

Use (old) Android Camera API and ffmpeg libs to send audio/video streams from Android device to media server.

Build Order:

1. Get sources

$ git clone https://github.com/amyznikov/libffplay.git

2. Enter root directoty

$ cd libffplay/

3. Get external submodules

$ git submodule init && git submodule update

4. Build submodules

It is mandatory to run the script 'build-modules' from inside of libffplay/external directory, because of it uses relative path names:

$ cd external && ./build-modules

By default this script will build libraries for android-15 platform (Android 4.0.3 devices). To change target platfom, open the script in a text editor and change target platform as desired.

After successfull build, prebuilt module binaries and headers will installed into libffplay/external/sysroot directory.

5. Now build libffplay main dynamic library

$ cd libffplay/src

$ make all

By default, target platform is android-15 platform (Android 4.0.3 devices). To change target platform, open Makefile in text editor and set desired platform in APP_PLATFORM= variable.

Warning: Make sure the submodules and libffplay.so are set to build for the same android platform!

6. Install libffplay into some location where application projects can find it.

By default, make install will install prebuilt shared library into NDK folder $(ndk_root)/special-is/lib/ffplay. To change target folder, pass prefix=/your/path/here to make install command:

$ make install prefix=/my/preferable/path

Prebuilt library directory structure is as follows:

$ tree /opt/android-ndk/special-is/lib/ffplay
/opt/android-ndk/special-is/lib/ffplay
├── Android.mk
├── armeabi-v7a
│   └── libffplay.so
└── ffplay
    └── com
        └── sis
            └── ffplay
                ├── CameraPreview.java
                └── log.java

To use the library in application, add to application project source path to $(ndk_root)/special-is/lib/ffplay/ffplay, add NDK support, and import ffplay module in Android.mk, like follows:

$ cat /home/projects/CameraDemo/jni/Android.mk 
  LOCAL_PATH := $(call my-dir)
  include $(CLEAR_VARS)
  SPECIALISDIR  := $(ANDROID_NDK)/special-is
  $(call import-add-path,$(SPECIALISDIR)/lib)
  $(call import-module,ffplay)
  
$ cat /home/projects/CameraDemo/jni/Application.mk 
  APP_MODULES           := ffplay
  APP_ABI               := armeabi-v7a
  APP_PLATFORM          := android-15
  APP_OPTIM             := release
  APP_DEBUGGABLE        := false

To use libffplay with ant, use custom_rules.xml to import java source directory and precompiled binaries into project:

$ cat custom_rules.xml
<?xml version="1.0" encoding="UTF-8"?>
<project>

  <property environment="env" />
  <property name="specialis.dir" value="${env.ANDROID_NDK}/special-is"/>
  <property name="source.dir" value="src;${specialis.dir}/lib/ffplay/ffplay"/>

  <target name="-pre-build">
    <copy todir="${jar.libs.dir}/armeabi-v7a">
     <fileset dir="${specialis.dir}/lib/ffplay/armeabi-v7a" includes="*.so" />
    </copy>
  </target>
</project>

See https://github.com/amyznikov/CameraDemo as some simple example.