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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* TFormatConversionProvider.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 1999, 2000 by Matthias Pfisterer
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
|<--- this code is formatted to fit into 80 columns --->|
*/
package org.tritonus.share.sampled.convert;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.spi.FormatConversionProvider;
import org.tritonus.share.TDebug;
import org.tritonus.share.sampled.AudioFormats;
/** Base class for all conversion providers of Tritonus.
*
* @author Matthias Pfisterer
*/
public abstract class TFormatConversionProvider
extends FormatConversionProvider
{
protected static final AudioFormat.Encoding[] EMPTY_ENCODING_ARRAY = new AudioFormat.Encoding[0];
protected static final AudioFormat[] EMPTY_FORMAT_ARRAY = new AudioFormat[0];
// $$fb2000-10-04: use AudioSystem.NOT_SPECIFIED for all fields.
public AudioInputStream getAudioInputStream(AudioFormat.Encoding targetEncoding, AudioInputStream audioInputStream)
{
AudioFormat sourceFormat = audioInputStream.getFormat();
AudioFormat targetFormat = new AudioFormat(
targetEncoding,
AudioSystem.NOT_SPECIFIED, // sample rate
AudioSystem.NOT_SPECIFIED, // sample size in bits
AudioSystem.NOT_SPECIFIED, // channels
AudioSystem.NOT_SPECIFIED, // frame size
AudioSystem.NOT_SPECIFIED, // frame rate
sourceFormat.isBigEndian()); // big endian
if (TDebug.TraceAudioConverter)
{
TDebug.out("TFormatConversionProvider.getAudioInputStream(AudioFormat.Encoding, AudioInputStream):");
TDebug.out("trying to convert to " + targetFormat);
}
return getAudioInputStream(targetFormat, audioInputStream);
}
/**
* WARNING: this method uses <code>getTargetFormats(AudioFormat.Encoding, AudioFormat)</code>
* which may create infinite loops if the latter is overwritten.
* <p>
* This method is overwritten here to make use of org.tritonus.share.sampled.AudioFormats.matches
* and is considered temporary until AudioFormat.matches is corrected in the JavaSound API.
*/
/* $$mp: if we decide to use getMatchingFormat(), this method should be
implemented by simply calling getMatchingFormat() and comparing the
result against null.
*/
public boolean isConversionSupported(
AudioFormat targetFormat,
AudioFormat sourceFormat)
{
if (TDebug.TraceAudioConverter)
{
TDebug.out(">TFormatConversionProvider.isConversionSupported(AudioFormat, AudioFormat):");
TDebug.out("class: "+getClass().getName());
TDebug.out("checking if conversion possible");
TDebug.out("from: " + sourceFormat);
TDebug.out("to: " + targetFormat);
}
AudioFormat[] aTargetFormats = getTargetFormats(targetFormat.getEncoding(), sourceFormat);
for (int i = 0; i < aTargetFormats.length; i++)
{
if (TDebug.TraceAudioConverter)
{
TDebug.out("checking against possible target format: " + aTargetFormats[i]);
}
if (aTargetFormats[i] != null
&& AudioFormats.matches(aTargetFormats[i], targetFormat))
{
if (TDebug.TraceAudioConverter)
{
TDebug.out("<result=true");
}
return true;
}
}
if (TDebug.TraceAudioConverter) {
TDebug.out("<result=false");
}
return false;
}
/**
* WARNING: this method uses <code>getTargetFormats(AudioFormat.Encoding, AudioFormat)</code>
* which may create infinite loops if the latter is overwritten.
* <p>
* This method is overwritten here to make use of org.tritonus.share.sampled.AudioFormats.matches
* and is considered temporary until AudioFormat.matches is corrected in the JavaSound API.
*/
public AudioFormat getMatchingFormat(
AudioFormat targetFormat,
AudioFormat sourceFormat)
{
if (TDebug.TraceAudioConverter)
{
TDebug.out(">TFormatConversionProvider.isConversionSupported(AudioFormat, AudioFormat):");
TDebug.out("class: "+getClass().getName());
TDebug.out("checking if conversion possible");
TDebug.out("from: " + sourceFormat);
TDebug.out("to: " + targetFormat);
}
AudioFormat[] aTargetFormats = getTargetFormats(targetFormat.getEncoding(), sourceFormat);
for (int i = 0; i < aTargetFormats.length; i++)
{
if (TDebug.TraceAudioConverter)
{
TDebug.out("checking against possible target format: " + aTargetFormats[i]);
}
if (aTargetFormats[i] != null
&& AudioFormats.matches(aTargetFormats[i], targetFormat))
{
if (TDebug.TraceAudioConverter)
{
TDebug.out("<result=true");
}
return aTargetFormats[i];
}
}
if (TDebug.TraceAudioConverter) {
TDebug.out("<result=false");
}
return null;
}
}
/*** TFormatConversionProvider.java ***/
|
