AudioTrackMp3Player

Extremely simple network mp3 music player for Android using AudioTrack and jlayer.

Steps

1. Include jlayer library into your project.

jlayer directory in this demo: /app/libs/jl1.0.1.jar

2. Create a Decoder from jlayer java library.

    Decoder mDecoder = new Decoder();
   

3. Build an InputStream of your mp3 url source and feed it into BitStream.

    InputStream in = new URL("http://icecast.omroep.nl:80/radio1-sb-mp3")
            .openConnection()
            .getInputStream();
    Bitstream bitstream = new Bitstream(in);
   

4. Create an AudioTrack instance.

    final int sampleRate = 44100;
    final int minBufferSize = AudioTrack.getMinBufferSize(sampleRate,
            AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT);
   
    AudioTrack mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
            sampleRate,
            AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT,
            minBufferSize,
            AudioTrack.MODE_STREAM);
   

5. Decode the coming mp3 stream by Decoder and feed PCM chunks to AudioTrack.

    Header header;
    while (framesReaded-- > 0 && (header = bitstream.readFrame()) != null) {
        SampleBuffer sampleBuffer = (SampleBuffer) mDecoder.decodeFrame(header, bitstream);
        short[] buffer = sampleBuffer.getBuffer();
        mAudioTrack.write(buffer, 0, buffer.length);
        bitstream.closeFrame();
    }