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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.engine;
import java.io.File;
import java.io.IOException;
import com.jsyn.data.FloatSample;
import com.jsyn.util.SampleLoader;
import com.jsyn.util.WaveFileWriter;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.fail;
public class TestWaveFileReadWrite {
public void checkWriteReadWave(int numChannels, float[] data) throws IOException {
File temp = File.createTempFile("test_wave", ".wav");
temp.deleteOnExit();
System.out.println("Creating wave file " + temp);
WaveFileWriter writer = new WaveFileWriter(temp);
writer.setFrameRate(44100);
writer.setSamplesPerFrame(numChannels);
writer.setBitsPerSample(16);
for (float datum : data) {
writer.write(datum);
}
writer.close();
// TODO Make sure blow up if writing after close.
// writer.write( 0.7 );
FloatSample sample = SampleLoader.loadFloatSample(temp);
assertEquals(numChannels, sample.getChannelsPerFrame(), "stereo");
assertEquals(44100.0, sample.getFrameRate(), "frame rate");
for (int i = 0; i < data.length; i++) {
float v = data[i];
if (v > 1.0)
v = 1.0f;
else if (v < -1.0)
v = -1.0f;
assertEquals(v, sample.readDouble(i), 0.0001, "sample data");
}
}
@Test
public void testRamp() throws IOException {
float[] data = new float[200];
for (int i = 0; i < data.length; i++) {
data[i] = i / 1000.0f;
}
checkWriteReadWave(2, data);
}
@Test
public void testClippedSine() throws IOException {
float[] data = new float[200];
for (int i = 0; i < data.length; i++) {
double phase = i * Math.PI * 2.0 / 100;
data[i] = (float) (1.3 * Math.sin(phase));
}
checkWriteReadWave(2, data);
}
@Test
public void testArguments() throws IOException {
File temp = File.createTempFile("test_wave", ".wav");
temp.deleteOnExit();
System.out.println("Creating wave file " + temp);
WaveFileWriter writer = new WaveFileWriter(temp);
writer.setBitsPerSample(16);
assertEquals(16, writer.getBitsPerSample(), "bitsPerSample");
writer.setBitsPerSample(24);
assertEquals(24, writer.getBitsPerSample(), "bitsPerSample");
try {
writer.setBitsPerSample(17);
fail("tried setting illegal value");
} catch (IllegalArgumentException e) {
// e.printStackTrace();
return;
} finally {
writer.close();
}
fail("17 bits per sample generated exception");
}
}
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