public interface Speaker {

	public void init();
	public boolean startPlayback();
	public boolean stopPlayback();
	public boolean getPlaybackState();
	public boolean setVolume(float _percent);
	public float getVolume();
	public int getPosition();
	public void setPosition(int _mSec);
	public void loadData(short _samples[], int _offs, int _len);
	public void clearData();
	public void registerCallback(SpeakerCallback _cb);

	capability Initialize {
		description = "Initialize object";
		method = "init()";
		method = "registerCallback(SpeakerCallback _cb)";
	}

	capability Playback {
		description = "Manage playback";
		method = "startPlayback()";
		method = "stopPlayback()";
		method = "getPlaybackState()";
	}

	capability Volume {
		description = "Manage volume";
		method = "setVolume(float _percent)";
		method = "getVolume()";
	}

	capability Position {
		description = "Manage position in the song";
		method = "getPosition()";
		method = "setPosition(int _mSec)";
	}

	capability Data {
		description = "Manage song data";
		method = "loadData(short _samples[], int _offs, int _len)";
		method = "clearData()";
	}
}