Mixer.java

package Roguelike.Sound;

import Roguelike.Global;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.audio.Music;

public class Mixer
{
	String musicName;
	Music music;
	float volume;

	String mixName;
	Music mix;
	float mixTime;
	float time;

	public Mixer(String musicName, float volume)
	{
		this.musicName = musicName;
		this.volume = volume;

		music = Gdx.audio.newMusic(Gdx.files.internal("Music/"+musicName+".ogg"));
		music.play();
		music.setLooping(true);
		music.setVolume( volume * Global.MusicVolume);
	}

	public void mix(String mixName, float time)
	{
		if (musicName.equals(mixName)) { return; }

		this.mixName = mixName;
		mix = Gdx.audio.newMusic(Gdx.files.internal("Music/"+mixName+".ogg"));

		try
		{
			mix.play();
			mix.setLooping(true);
			mix.setVolume(0);
			mixTime = time;
			this.time = 0;
		}
		catch (Exception e)
		{
			musicName = mixName;
			music.stop();
			music.dispose();
			music = mix;
			mix = null;

			music.play();
			music.setLooping( true );

			float actualVolume = volume * Global.MusicVolume;
			music.setVolume(actualVolume);
		}
	}

	public void update(float delta)
	{
		if (mix != null)
		{
			time += delta;

			float actualVolume = volume * Global.MusicVolume;

			float vol = actualVolume * (time / mixTime);
			mix.setVolume(vol);
			music.setVolume(actualVolume-vol);

			if (time >= mixTime)
			{
				musicName = mixName;
				music.stop();
				music.dispose();
				music = mix;
				mix = null;
				music.setVolume(actualVolume);
			}
		}
	}

	public void updateVolume()
	{
		if (mix == null)
		{
			music.setVolume( volume * Global.MusicVolume );
		}
	}
}