1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*
* 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 javax.sound.sampled.UnsupportedAudioFileException;
import junit.framework.TestCase;
import com.jsyn.data.FloatSample;
import com.jsyn.util.SampleLoader;
import com.jsyn.util.WaveFileWriter;
public class TestWaveFileReadWrite extends TestCase {
public void checkWriteReadWave(int numChannels, float[] data) throws IOException,
UnsupportedAudioFileException {
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 (int i = 0; i < data.length; i++) {
writer.write(data[i]);
}
writer.close();
// TODO Make sure blow up if writing after close.
// writer.write( 0.7 );
FloatSample sample = SampleLoader.loadFloatSample(temp);
assertEquals("stereo", numChannels, sample.getChannelsPerFrame());
assertEquals("frame rate", 44100.0, sample.getFrameRate());
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("sample data", v, sample.readDouble(i), 0.0001);
}
}
public void testRamp() throws IOException, UnsupportedAudioFileException {
float[] data = new float[200];
for (int i = 0; i < data.length; i++) {
data[i] = i / 1000.0f;
}
checkWriteReadWave(2, data);
}
public void testClippedSine() throws IOException, UnsupportedAudioFileException {
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);
}
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("bitsPerSample", 16, writer.getBitsPerSample());
writer.setBitsPerSample(24);
assertEquals("bitsPerSample", 24, writer.getBitsPerSample());
boolean caughtIt = false;
try {
writer.setBitsPerSample(17);
assertTrue("tried setting illegal value", false);
} catch (IllegalArgumentException e) {
// e.printStackTrace();
caughtIt = true;
}
assertTrue("17 generated exception", caughtIt);
writer.close();
}
}
|
