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Diffstat (limited to 'src/main/java/com/jsyn/unitgen/Delay.java')
-rw-r--r-- | src/main/java/com/jsyn/unitgen/Delay.java | 57 |
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 new file mode 100644 index 0000000..aa450a9 --- /dev/null +++ b/src/main/java/com/jsyn/unitgen/Delay.java @@ -0,0 +1,57 @@ +/* + * 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; + } + } + } + +} |