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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* SkipTest.java
*/
/*
* Copyright (c) 1999, 2000 by Matthias Pfisterer <Matthias.Pfisterer@gmx.de>
*
*
* 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.
*
*/
import java.io.InputStream;
import java.io.IOException;
import java.io.FileNotFoundException;
import java.io.File;
import java.net.URL;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
public class SkipTest
{
private static final int LOAD_METHOD_STREAM = 1;
private static final int LOAD_METHOD_FILE = 2;
private static final int LOAD_METHOD_URL = 3;
public static void main(String[] args)
{
if (args.length == 0)
{
printUsageAndExit();
}
int nLoadMethod = LOAD_METHOD_FILE;
boolean bCheckAudioInputStream = false;
int nCurrentArg = 0;
while (nCurrentArg < args.length)
{
if (args[nCurrentArg].equals("-h"))
{
printUsageAndExit();
}
/*
else if (args[nCurrentArg].equals("-s"))
{
nLoadMethod = LOAD_METHOD_STREAM;
}
else if (args[nCurrentArg].equals("-f"))
{
nLoadMethod = LOAD_METHOD_FILE;
}
else if (args[nCurrentArg].equals("-u"))
{
nLoadMethod = LOAD_METHOD_URL;
}
else if (args[nCurrentArg].equals("-i"))
{
bCheckAudioInputStream = true;
}
*/
nCurrentArg++;
}
bCheckAudioInputStream = true;
String strSource = args[nCurrentArg - 2];
long lSkip = Long.parseLong(args[nCurrentArg - 1]);
String strFilename = null;
AudioFileFormat aff = null;
AudioInputStream ais = null;
try
{
switch (nLoadMethod)
{
case LOAD_METHOD_STREAM:
InputStream inputStream = System.in;
aff = AudioSystem.getAudioFileFormat(inputStream);
strFilename = "<standard input>";
if (bCheckAudioInputStream)
{
ais = AudioSystem.getAudioInputStream(inputStream);
}
break;
case LOAD_METHOD_FILE:
File file = new File(strSource);
aff = AudioSystem.getAudioFileFormat(file);
strFilename = file.getCanonicalPath();
if (bCheckAudioInputStream)
{
ais = AudioSystem.getAudioInputStream(file);
}
break;
case LOAD_METHOD_URL:
URL url = new URL(strSource);
aff = AudioSystem.getAudioFileFormat(url);
strFilename = url.toString();
if (bCheckAudioInputStream)
{
ais = AudioSystem.getAudioInputStream(url);
}
break;
}
}
catch (Exception e)
{
e.printStackTrace();
System.exit(1);
}
if (aff == null)
{
System.out.println("Cannot determine format");
}
else
{
/*
AudioFormat format = aff.getFormat();
System.out.println("---------------------------------------------------------------------------");
System.out.println("Source: " + strFilename);
System.out.println("Type: " + aff.getType());
System.out.println("AudioFormat: " + format);
System.out.println("---------------------------------------------------------------------------");
String strAudioLength = null;
if (aff.getFrameLength() != AudioSystem.NOT_SPECIFIED)
{
strAudioLength = "" + aff.getFrameLength() + " frames (= " + aff.getFrameLength() * format.getFrameSize() + " bytes)";
}
else
{
strAudioLength = "unknown";
}
System.out.println("Length of audio data: " + strAudioLength);
String strFileLength = null;
if (aff.getByteLength() != AudioSystem.NOT_SPECIFIED)
{
strFileLength = "" + aff.getByteLength() + " bytes)";
}
else
{
strFileLength = "unknown";
}
System.out.println("Total length of file (including headers): " + strFileLength);
*/
if (bCheckAudioInputStream)
{
// System.out.println("[AudioInputStream says:] Length of audio data: " + ais.getFrameLength() + " frames (= " + ais.getFrameLength() * ais.getFormat().getFrameSize() + " bytes)");
System.out.println("frame length: " + ais.getFrameLength());
System.out.println("frame size: " + ais.getFormat().getFrameSize());
System.out.println("AIS class:" + ais);
System.out.println("now skipping...");
long lSkipped = 0;
try
{
lSkipped = ais.skip(lSkip);
}
catch (IOException e)
{
e.printStackTrace();
}
System.out.println("skipped: " + lSkipped);
}
System.out.println("---------------------------------------------------------------------------");
}
}
private static void printUsageAndExit()
{
System.out.println("SkipTest: usage:");
System.out.println("\tjava SkipTest <audiofile> <skip>");
System.exit(1);
}
}
/*** SkipTest.java ***/
|
