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SoundSequence.java
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111 lines (99 loc) · 4.44 KB
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/*
Copyright (c) 2008, Interactive Pulp, LLC
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.
* Neither the name of Interactive Pulp, LLC nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
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 OWNER 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 pulpcore.sound;
import java.util.ArrayList;
import pulpcore.Build;
import pulpcore.CoreSystem;
/**
A SoundSequence is a immutable sequence of sampled sounds that can be played together
smoothly with no skips or breaks between sounds. The sounds can be a mix of mono and
stereo Sounds, or other SoundSequences.
<p>
All sounds in a sequence must have the sample sample rate.
*/
public final class SoundSequence extends Sound {
private ArrayList children = new ArrayList();
private int numFrames;
/**
@throws IllegalArgumentException if not all sounds in the sequence have the same
sample rate.
*/
public SoundSequence(Sound[] sounds) {
super(sounds[0].getSampleRate());
for (int i = 0; i < sounds.length; i++) {
if (sounds[i].getSampleRate() != getSampleRate()) {
if (Build.DEBUG) {
CoreSystem.print("The first sound (sound[0]) in SoundSequence is " +
getSampleRate() + "Hz, but sound[" + i + "] is " +
sounds[i].getSampleRate() + "Hz.");
}
throw new IllegalArgumentException();
}
if (sounds[i] instanceof SoundSequence) {
children.addAll(((SoundSequence)sounds[i]).children);
}
else if (sounds[i] != null) {
children.add(sounds[i]);
}
}
numFrames = 0;
for (int i = 0; i < children.size(); i++) {
numFrames += ((Sound)children.get(i)).getNumFrames();
}
}
public int getNumFrames() {
return numFrames;
}
public void getSamples(byte[] dest, int destOffset, int destChannels,
int srcFrame, int numFrames)
{
int destFrameSize = getSampleSize() * destChannels;
int childIndex = 0;
int childFrame = 0;
while (childIndex < children.size() && numFrames > 0) {
Sound child = (Sound)children.get(childIndex);
int childNumFrames = child.getNumFrames();
if (srcFrame >= childFrame + childNumFrames) {
childIndex++;
childFrame += childNumFrames;
}
else {
int childSrcFrame = srcFrame - childFrame;
int framesToGet = Math.min(numFrames, childNumFrames - childSrcFrame);
child.getSamples(dest, destOffset, destChannels, childSrcFrame, framesToGet);
destOffset += framesToGet * destFrameSize;
srcFrame += framesToGet;
numFrames -= framesToGet;
}
}
if (numFrames > 0) {
int length = numFrames * destFrameSize;
for (int i = 0; i < length; i++) {
dest[destOffset++] = 0;
}
}
}
}