Re-implementation of Android's MediaPlayer and audio effect classes based on OpenSL ES APIs.
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Re-implementation of Android's MediaPlayer and audio effect classes based on OpenSL ES APIs.

Android Arsenal


I decided to develop this library to solve these frustrations.



  • Provides both C++ and Java API sets
  • Smooth fade in/out when starts/pauses playback
  • High quality resampler
  • 10 bands graphic equalizer & pre. amplifier
  • High quality Visualizer class (floating point, stereo, 32k samples/capture, 60 sampling/second)


  • Does not support video playback, audio only ( Please use MediaPlayer or ExoPlayer for video playback)
  • Consumes more CPU resources than standard MediaPlayer and other AudioTrack/OpenSL based audio player products (ex. PowerAmp)


  • Highly compatibility with standard MediaPlayer and audio effect classes
  • Implements a lot of workarounds, more better behavior and well-tested (Standard* prefixed API classes)
  • Provides Hybrid media player factory which is a player using OpenSL ES for decoding audio and using AudioTrack for playback. This is the most recommended MediaPlayer because it provides more tolerance for audio glitches than OpenSLMediaPlayer but it can use all features of OpenSLMediaPlayer!
  • Provides some compatibility class or methods for older devices
  • NEON/SSE optimized

Target platforms

  • Android API level 14+ (since this library depends decoding feature introduced from API level 14)

Latest version

  • Version 0.7.5 (May 6, 2017)

Demo application (pre-built example apps)

See GitHub Pages site of this project.

Getting started

Use pre-built library (for Android Studio only)

  1. Add these lines to build.gradle of your project
dependencies {
    compile ''
  1. That's all ;)

Build from source

If you want to build this library from source, please refer to this article.


Refer to Wiki and JavaDoc.


  • More optimize
  • Improve JavaDoc comments


This library is licensed under the Apache Software License, Version 2.0, and contains some source code files delivered from product of Android Open Source Project (AOSP). See for details.

Note that this library uses some third party libraries, so you also have to take care of their licenses.

License of OpenSLMediaPlayer (this library)

See LICENSE for full of the license text.

Copyright (C) 2014-2015 Haruki Hasegawa

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
See the License for the specific language governing permissions and
limitations under the License.

License of dependent libraries

cxxdasp, cxxporthelper, OpenSL ES CXX

These libraries are licensed under the Apache Software License, Version 2.0.


This library is licensed under the FFTPACK5 Software License.


This library is licensed under the BSD 3-Clause license.