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/*
* Copyright 2009 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.unitgen;
/**
* Simple non-interpolating delay. The delay line must be allocated by calling allocate(n).
*
* @author Phil Burk (C) 2009 Mobileer Inc
* @version 016
* @see InterpolatingDelay
*/
public class Delay extends UnitFilter {
private float[] buffer;
private int cursor;
private int numSamples;
/**
* Allocate an internal array for the delay line.
*
* @param numSamples
*/
public void allocate(int numSamples) {
this.numSamples = numSamples;
buffer = new float[numSamples];
}
@Override
public void generate(int start, int limit) {
double[] inputs = input.getValues();
double[] outputs = output.getValues();
for (int i = start; i < limit; i++) {
outputs[i] = buffer[cursor];
buffer[cursor] = (float) inputs[i];
cursor += 1;
if (cursor >= numSamples) {
cursor = 0;
}
}
}
}
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