com.github.bloodshura.x.assets.sound.codec.MidiCodec Maven / Gradle / Ivy

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An API for reading, writing and manipulating fonts, images and sounds.
There is a newer version: 1.1.0
/*
 * Copyright (c) 2013-2018, João Vitor Verona Biazibetti - All Rights Reserved
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see .
 *
 * https://www.github.com/BloodShura
 */

package com.github.bloodshura.x.assets.sound.codec;

import com.github.bloodshura.x.assets.sound.Sound;
import com.github.bloodshura.x.assets.sound.Sound.PlayMode;
import com.github.bloodshura.x.assets.sound.exception.SoundException;

import javax.annotation.Nonnull;
import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Sequence;
import javax.sound.midi.Sequencer;
import java.io.IOException;
import java.time.Duration;
import java.util.concurrent.TimeUnit;

public class MidiCodec implements SoundCodec {
	private Sequence sequence;
	private Sequencer sequencer;
	private final Sound sound;

	public MidiCodec(@Nonnull Sound sound) {
		this.sound = sound;
	}

	@Nonnull
	@Override
	public Duration getDuration() {
		return Duration.ofNanos(TimeUnit.MICROSECONDS.toNanos(sequence.getMicrosecondLength()));
	}

	@Deprecated
	@Override
	public double getGain() {
		return 1.0D;
	}

	@Deprecated
	@Override
	public double getPitch() {
		return 1.0D;
	}

	@Nonnull
	@Override
	public Duration getPosition() {
		if (isPlaying()) {
			return Duration.ofNanos(TimeUnit.MICROSECONDS.toNanos(sequencer.getMicrosecondPosition()));
		}

		return null;
	}

	@Override
	public boolean isPlaying() {
		return sequencer.getSequence() == sequence && sequencer.isRunning();
	}

	@Override
	public boolean isSetUp() {
		return sequence != null && sequencer != null;
	}

	@Override
	public void play(@Nonnull PlayMode playMode) throws SoundException {
		if (!isPlaying()) {
			try {
				sequencer.setSequence(sequence);
				sequencer.setLoopCount(playMode == PlayMode.LOOP ? Integer.MAX_VALUE : 0);
				sequencer.start();
			}
			catch (InvalidMidiDataException exception) {
				throw new SoundException(exception.getMessage());
			}
		}
	}

	@Deprecated
	@Override
	public void setGain(double gain) throws UnsupportedOperationException {
		throw new UnsupportedOperationException();
	}

	@Deprecated
	@Override
	public void setPitch(double pitch) throws UnsupportedOperationException {
		throw new UnsupportedOperationException();
	}

	@Override
	public void setPosition(@Nonnull Duration duration) {
		sequencer.setMicrosecondPosition(TimeUnit.NANOSECONDS.toMicros(duration.toNanos()));
	}

	@Override
	public void setup() throws IOException {
		try {
			this.sequence = MidiSystem.getSequence(sound.newInputStream());
			this.sequencer = MidiSystem.getSequencer();

			sequencer.open();
		}
		catch (InvalidMidiDataException | MidiUnavailableException exception) {
			// These exceptions are only constructable with message, without cause, so no need to pass it.
			throw new IOException(exception.getMessage());
		}
	}

	@Override
	public void stop() {
		if (isPlaying()) {
			sequencer.stop();
		}
	}
}