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/*
* Copyright 2010 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.data;
import com.jsyn.engine.SynthesisEngine;
import com.jsyn.unitgen.FixedRateMonoReader;
import com.jsyn.unitgen.FixedRateStereoReader;
import com.jsyn.unitgen.VariableRateMonoReader;
import com.jsyn.unitgen.VariableRateStereoReader;
import com.jsyn.util.SampleLoader;
/**
* Store multi-channel short audio data in an interleaved buffer.
*
* @author Phil Burk (C) 2010 Mobileer Inc
* @see SampleLoader
* @see FixedRateMonoReader
* @see FixedRateStereoReader
* @see VariableRateMonoReader
* @see VariableRateStereoReader
*/
public class ShortSample extends AudioSample {
private short[] buffer;
public ShortSample() {
}
public ShortSample(int numFrames, int channelsPerFrame) {
allocate(numFrames, channelsPerFrame);
}
/** Constructor for mono samples with data. */
public ShortSample(short[] data) {
this(data.length, 1);
write(data);
}
/** Constructor for multi-channel samples with data. */
public ShortSample(short[] data, int channelsPerFrame) {
this(data.length / channelsPerFrame, channelsPerFrame);
write(data);
}
@Override
public void allocate(int numFrames, int channelsPerFrame) {
buffer = new short[numFrames * channelsPerFrame];
this.numFrames = numFrames;
this.channelsPerFrame = channelsPerFrame;
}
/**
* Note that in a stereo sample, a frame has two values.
*
* @param startFrame index of frame in the sample
* @param data data to be written
* @param startIndex index of first value in array
* @param numFrames
*/
public void write(int startFrame, short[] data, int startIndex, int numFrames) {
int numSamplesToWrite = numFrames * channelsPerFrame;
int firstSampleIndexToWrite = startFrame * channelsPerFrame;
System.arraycopy(data, startIndex, buffer, firstSampleIndexToWrite, numSamplesToWrite);
}
/**
* Note that in a stereo sample, a frame has two values.
*
* @param startFrame index of frame in the sample
* @param data array to receive the data from the sample
* @param startIndex index of first location in array to start filling
* @param numFrames
*/
public void read(int startFrame, short[] data, int startIndex, int numFrames) {
int numSamplesToRead = numFrames * channelsPerFrame;
int firstSampleIndexToRead = startFrame * channelsPerFrame;
System.arraycopy(buffer, firstSampleIndexToRead, data, startIndex, numSamplesToRead);
}
public void write(short[] data) {
write(0, data, 0, data.length);
}
public void read(short[] data) {
read(0, data, 0, data.length);
}
public short readShort(int index) {
return buffer[index];
}
public void writeShort(int index, short value) {
buffer[index] = value;
}
/** Read a sample converted to a double in the range -1.0 to almost 1.0. */
@Override
public double readDouble(int index) {
return SynthesisEngine.convertShortToDouble(buffer[index]);
}
/**
* Write a double that will be clipped to the range -1.0 to almost 1.0 and converted to a short.
*/
@Override
public void writeDouble(int index, double value) {
buffer[index] = SynthesisEngine.convertDoubleToShort(value);
}
}
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