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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);
+ }
+
+}