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MemMusic.java
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MemMusic.java
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/*
* Copyright (c) 2012, Finn Kuusisto
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package kuusisto.tinysound.internal;
import kuusisto.tinysound.Music;
import kuusisto.tinysound.TinySound;
/**
* The MemMusic class is an implementation of the Music interface that stores
* all audio data in memory for low latency.
*
* @author Finn Kuusisto
*/
public class MemMusic implements Music {
private byte[] left;
private byte[] right;
private Mixer mixer;
private MusicReference reference;
/**
* Construct a new MemMusic with the given music data and the Mixer with
* which to register this MemMusic.
* @param left left channel of music data
* @param right right channel of music data
* @param mixer Mixer with which this Music is registered
*/
public MemMusic(byte[] left, byte[] right, Mixer mixer) {
this.left = left;
this.right = right;
this.mixer = mixer;
this.reference = new MemMusicReference(this.left, this.right, false,
false, 0, 0, 1.0);
this.mixer.registerMusicReference(this.reference);
}
/**
* Play this MemMusic and loop if specified.
* @param loop if this MemMusic should loop
*/
@Override
public void play(boolean loop) {
this.reference.setLoop(loop);
this.reference.setPlaying(true);
}
/**
* Play this MemMusic at the specified volume and loop if specified.
* @param loop if this MemMusic should loop
* @param volume the volume to play the this Music
*/
@Override
public void play(boolean loop, double volume) {
this.setLoop(loop);
this.setVolume(volume);
this.reference.setPlaying(true);
}
/**
* Stop playing this MemMusic and set its position to the beginning.
*/
@Override
public void stop() {
this.reference.setPlaying(false);
this.rewind();
}
/**
* Stop playing this MemMusic and keep its current position.
*/
@Override
public void pause() {
this.reference.setPlaying(false);
}
/**
* Play this MemMusic from its current position.
*/
@Override
public void resume() {
this.reference.setPlaying(true);
}
/**
* Set this MemMusic's position to the beginning.
*/
@Override
public void rewind() {
this.reference.setPosition(0);
}
/**
* Set this MemMusic's position to the loop position.
*/
@Override
public void rewindToLoopPosition() {
long byteIndex = this.reference.getLoopPosition();
this.reference.setPosition(byteIndex);
}
/**
* Determine if this MemMusic is playing.
* @return true if this MemMusic is playing
*/
@Override
public boolean playing() {
return this.reference.getPlaying();
}
/**
* Determine if this MemMusic has reached its end and is done playing.
* @return true if this MemMusic has reached the end and is done playing
*/
@Override
public boolean done() {
return this.reference.done();
}
/**
* Determine if this MemMusic will loop.
* @return true if this MemMusic will loop
*/
@Override
public boolean loop() {
return this.reference.getLoop();
}
/**
* Set whether this MemMusic will loop.
* @param loop whether this MemMusic will loop
*/
@Override
public void setLoop(boolean loop) {
this.reference.setLoop(loop);
}
/**
* Get the loop position of this MemMusic by sample frame.
* @return loop position by sample frame
*/
@Override
public int getLoopPositionByFrame() {
int bytesPerChannelForFrame = TinySound.FORMAT.getFrameSize() /
TinySound.FORMAT.getChannels();
long byteIndex = this.reference.getLoopPosition();
return (int)(byteIndex / bytesPerChannelForFrame);
}
/**
* Get the loop position of this MemMusic by seconds.
* @return loop position by seconds
*/
@Override
public double getLoopPositionBySeconds() {
int bytesPerChannelForFrame = TinySound.FORMAT.getFrameSize() /
TinySound.FORMAT.getChannels();
long byteIndex = this.reference.getLoopPosition();
return (byteIndex / (TinySound.FORMAT.getFrameRate() *
bytesPerChannelForFrame));
}
/**
* Set the loop position of this MemMusic by sample frame.
* @param frameIndex sample frame loop position to set
*/
@Override
public void setLoopPositionByFrame(int frameIndex) {
//get the byte index for a channel
int bytesPerChannelForFrame = TinySound.FORMAT.getFrameSize() /
TinySound.FORMAT.getChannels();
long byteIndex = (long)(frameIndex * bytesPerChannelForFrame);
this.reference.setLoopPosition(byteIndex);
}
/**
* Set the loop position of this MemMusic by seconds.
* @param seconds loop position to set by seconds
*/
@Override
public void setLoopPositionBySeconds(double seconds) {
//get the byte index for a channel
int bytesPerChannelForFrame = TinySound.FORMAT.getFrameSize() /
TinySound.FORMAT.getChannels();
long byteIndex = (long)(seconds * TinySound.FORMAT.getFrameRate() *
bytesPerChannelForFrame);
this.reference.setLoopPosition(byteIndex);
}
/**
* Get the volume of this MemMusic.
* @return volume of this MemMusic
*/
@Override
public double getVolume() {
return this.reference.getVolume();
}
/**
* Set the volume of this MemMusic.
* @param volume the desired volume of this MemMusic
*/
@Override
public void setVolume(double volume) {
if (volume >= 0.0) {
this.reference.setVolume(volume);
}
}
/**
* Unload this MemMusic from the system. Attempts to use this MemMusic
* after unloading will result in error.
*/
@Override
public void unload() {
//unregister the reference
this.mixer.unRegisterMusicReference(this.reference);
this.reference.dispose();
this.mixer = null;
this.left = null;
this.right = null;
this.reference = null;
}
/////////////
//Reference//
/////////////
/**
* The MemMusicReference is an implementation of the MusicReference
* interface.
*
* @author Finn Kuusisto
*/
private static class MemMusicReference implements MusicReference {
private byte[] left;
private byte[] right;
private boolean playing;
private boolean loop;
private int loopPosition;
private int position;
private double volume;
/**
* Construct a new MemMusicReference with the given audio data and
* settings.
* @param left left channel of music data
* @param right right channel of music data
* @param playing true if the music should be playing
* @param loop true if the music should loop
* @param loopPosition byte index of the loop position in music data
* @param position byte index position in music data
* @param volume volume to play the music
*/
public MemMusicReference(byte[] left, byte[] right, boolean playing,
boolean loop, int loopPosition, int position, double volume) {
this.left = left;
this.right = right;
this.playing = playing;
this.loop = loop;
this.loopPosition = loopPosition;
this.position = position;
this.volume = volume;
}
/**
* Get the playing setting of this MemMusicReference.
* @return true if this MemMusicReference is set to play
*/
@Override
public synchronized boolean getPlaying() {
return this.playing;
}
/**
* Get the loop setting of this MemMusicReference.
* @return true if this MemMusicReference is set to loop
*/
@Override
public synchronized boolean getLoop() {
return this.loop;
}
/**
* Get the byte index of this MemMusicReference.
* @return byte index of this MemMusicReference
*/
@Override
public synchronized long getPosition() {
return this.position;
}
/**
* Get the loop-position byte index of this MemMusicReference.
* @return loop-position byte index of this MemMusicReference
*/
@Override
public synchronized long getLoopPosition() {
return this.loopPosition;
}
/**
* Get the volume of this MemMusicReference.
* @return volume of this MemMusicReference
*/
@Override
public synchronized double getVolume() {
return this.volume;
}
/**
* Set whether this MemMusicReference is playing.
* @param playing whether this MemMusicReference is playing
*/
@Override
public synchronized void setPlaying(boolean playing) {
this.playing = playing;
}
/**
* Set whether this MemMusicReference will loop.
* @param loop whether this MemMusicReference will loop
*/
@Override
public synchronized void setLoop(boolean loop) {
this.loop = loop;
}
/**
* Set the byte index of this MemMusicReference.
* @param position the byte index to set
*/
@Override
public synchronized void setPosition(long position) {
if (position >= 0 && position < this.left.length) {
this.position = (int)position;
}
}
/**
* Set the loop-position byte index of this MemMusicReference.
* @param loopPosition the loop-position byte index to set
*/
@Override
public synchronized void setLoopPosition(long loopPosition) {
if (loopPosition >= 0 && loopPosition < this.left.length) {
this.loopPosition = (int)loopPosition;
}
}
/**
* Set the volume of this MemMusicReference.
* @param volume the desired volume of this MemMusicReference
*/
@Override
public synchronized void setVolume(double volume) {
this.volume = volume;
}
/**
* Get the number of bytes remaining for each channel until the end of
* this MemMusicReference.
* @return number of bytes remaining for each channel
*/
@Override
public synchronized long bytesAvailable() {
return this.left.length - this.position;
}
/**
* Determine if there are no bytes remaining and play has stopped.
* @return true if there are no bytes remaining and the reference is no
* longer playing
*/
@Override
public synchronized boolean done() {
long available = this.left.length - this.position;
return available <= 0 && !this.playing;
}
/**
* Skip a specified number of bytes of the audio data.
* @param num number of bytes to skip
*/
@Override
public synchronized void skipBytes(long num) {
for (int i = 0; i < num; i++) {
this.position++;
//wrap if looping, stop otherwise
if (this.position >= this.left.length) {
if (this.loop) {
this.position = this.loopPosition;
}
else {
this.playing = false;
}
}
}
}
/**
* Get the next two bytes from the music data in the specified
* endianness.
* @param data length-2 array to write in next two bytes from each
* channel
* @param bigEndian true if the bytes should be read big-endian
*/
@Override
public synchronized void nextTwoBytes(int[] data, boolean bigEndian) {
if (bigEndian) {
//left
data[0] = ((this.left[this.position] << 8) |
(this.left[this.position + 1] & 0xFF));
//right
data[1] = ((this.right[this.position] << 8) |
(this.right[this.position + 1] & 0xFF));
}
else {
//left
data[0] = ((this.left[this.position + 1] << 8) |
(this.left[this.position] & 0xFF));
//right
data[1] = ((this.right[this.position + 1] << 8) |
(this.right[this.position] & 0xFF));
}
this.position += 2;
//wrap if looping, stop otherwise
if (this.position >= this.left.length) {
if (this.loop) {
this.position = this.loopPosition;
}
else {
this.playing = false;
}
}
}
/**
* Does any cleanup necessary to dispose of resources in use by this
* MemMusicReference.
*/
@Override
public synchronized void dispose() {
this.playing = false;
this.position = this.left.length + 1;
this.left = null;
this.right = null;
}
}
}