1 files changed, 57 insertions, 0 deletions
diff --git a/src/main/java/com/jsyn/unitgen/Delay.java b/src/main/java/com/jsyn/unitgen/Delay.java
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+++ 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;
+            }
+        }
+    }
+
+}