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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;
import com.jsyn.util.AudioStreamReader;
public class TestDelay extends NonRealTimeTestCase {
public void testFloor() {
double x = -7.3;
int n = (int) Math.floor(x);
assertEquals("int", -8, n);
}
public void checkInterpolatingDelay(int maxFrames, double delayFrames)
throws InterruptedException {
synthesisEngine.start();
System.out.printf("test delayFrames = %7.5f\n", delayFrames);
InterpolatingDelay delay = new InterpolatingDelay();
synthesisEngine.add(delay);
delay.allocate(maxFrames);
delay.delay.set(delayFrames / 44100.0);
SawtoothOscillator osc = new SawtoothOscillator();
synthesisEngine.add(osc);
osc.frequency.set(synthesisEngine.getFrameRate() / 4.0);
osc.amplitude.set(1.0);
osc.output.connect(delay.input);
int samplesPerFrame = 1;
AudioStreamReader reader = new AudioStreamReader(synthesisEngine, samplesPerFrame);
delay.output.connect(reader.getInput());
delay.start();
for (int i = 0; i < (3 * maxFrames); i++) {
if (reader.available() == 0) {
synthesisEngine.sleepFor(0.01);
}
double actual = reader.read();
double expected = 1 + i - delayFrames;
if (expected < 0.0) {
expected = 0.0;
}
// System.out.printf( "[%d] expected = %7.3f, delayed = %7.3f\n", i, expected, actual );
// assertEquals("delayed output", expected, actual, 0.00001);
}
}
public void testSmall() throws InterruptedException {
checkInterpolatingDelay(40, 7.0);
}
public void testEven() throws InterruptedException {
checkInterpolatingDelay(44100, 13671.0);
}
public void testInterpolatingDelay() throws InterruptedException {
checkInterpolatingDelay(44100, 13671.4);
}
}
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