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-rw-r--r--src/main/java/com/jsyn/unitgen/Delay.java57
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diff --git a/src/main/java/com/jsyn/unitgen/Delay.java b/src/main/java/com/jsyn/unitgen/Delay.java
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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;
+ }
+ }
+ }
+
+}