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Diffstat (limited to 'src/com/jsyn/data/ShortSample.java')
-rw-r--r-- | src/com/jsyn/data/ShortSample.java | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/com/jsyn/data/ShortSample.java b/src/com/jsyn/data/ShortSample.java new file mode 100644 index 0000000..4a4110e --- /dev/null +++ b/src/com/jsyn/data/ShortSample.java @@ -0,0 +1,123 @@ +/* + * 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); + } + +} |