1 /*GstAudioFileReader -- GNU Classpath GStreamer AudioFileReader. 2 Copyright (C) 2007 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 package gnu.javax.sound.sampled.gstreamer.io; 39 40 import gnu.java.lang.CPStringBuilder; 41 42 import gnu.javax.sound.sampled.gstreamer.GStreamerMixer; 43 44 import java.io.BufferedInputStream; 45 import java.io.File; 46 import java.io.FileInputStream; 47 import java.io.IOException; 48 import java.io.InputStream; 49 import java.net.URL; 50 import javax.sound.sampled.AudioFileFormat; 51 import javax.sound.sampled.AudioFormat; 52 import javax.sound.sampled.AudioInputStream; 53 import javax.sound.sampled.AudioSystem; 54 import javax.sound.sampled.UnsupportedAudioFileException; 55 import javax.sound.sampled.spi.AudioFileReader; 56 57 /** 58 * An implementation of a general AudioFileReader. Uses GStreamer to 59 * parse and retrieve informations about the file passed as input. 60 * 61 * @author Mario Torre <neugens@limasoftware.net> 62 */ 63 public class GstAudioFileReader 64 extends AudioFileReader 65 { 66 @Override getAudioFileFormat(File file)67 public AudioFileFormat getAudioFileFormat(File file) 68 throws UnsupportedAudioFileException, IOException 69 { 70 CPStringBuilder name = new CPStringBuilder(file.getName()); 71 String _name = name.substring(name.lastIndexOf(".") + 1); 72 73 return getAudioFileFormat( 74 new BufferedInputStream(new FileInputStream(file)), _name); 75 } 76 77 @Override getAudioFileFormat(InputStream is)78 public AudioFileFormat getAudioFileFormat(InputStream is) 79 throws UnsupportedAudioFileException, IOException 80 { 81 return getAudioFileFormat(is, null); 82 } 83 getAudioFileFormat(InputStream is, String extension)84 private AudioFileFormat getAudioFileFormat(InputStream is, String extension) 85 throws UnsupportedAudioFileException 86 { 87 AudioFormat format = null; 88 try 89 { 90 format = GstAudioFileReaderNativePeer.getAudioFormat(is); 91 } 92 catch (Exception e) 93 { 94 UnsupportedAudioFileException ex = 95 new UnsupportedAudioFileException("Unsupported encoding."); 96 97 ex.initCause(ex.getCause()); 98 throw ex; 99 } 100 101 if (format == null) 102 throw new UnsupportedAudioFileException("Unsupported encoding."); 103 104 String name = format.getProperty(GStreamerMixer.GST_DECODER).toString(); 105 106 if (extension == null) 107 { 108 extension = 109 format.getProperty(GStreamerMixer.GST_FILE_EXTENSION).toString(); 110 } 111 112 AudioFileFormat.Type type = 113 new AudioFileFormat.Type(name, extension); 114 115 // TODO: we should calculate this in some way. We don't need it, but 116 // application may want to use this data. 117 return new AudioFileFormat(type, format, AudioSystem.NOT_SPECIFIED); 118 } 119 120 @Override getAudioFileFormat(URL url)121 public AudioFileFormat getAudioFileFormat(URL url) 122 throws UnsupportedAudioFileException, IOException 123 { 124 return getAudioFileFormat(new BufferedInputStream(url.openStream())); 125 } 126 127 @Override getAudioInputStream(File file)128 public AudioInputStream getAudioInputStream(File file) 129 throws UnsupportedAudioFileException, IOException 130 { 131 InputStream stream = new FileInputStream(file); 132 long length = file.length(); 133 134 AudioFormat format = null; 135 136 try 137 { 138 format = GstAudioFileReaderNativePeer.getAudioFormat(file); 139 } 140 catch (Exception e) 141 { 142 UnsupportedAudioFileException ex = 143 new UnsupportedAudioFileException("Unsupported encoding."); 144 145 ex.initCause(ex.getCause()); 146 throw ex; 147 } 148 149 // get the header size 150 if (format == null) 151 throw new UnsupportedAudioFileException("Unsupported encoding."); 152 153 return new AudioInputStream(stream, format, length); 154 } 155 156 @Override getAudioInputStream(InputStream is)157 public AudioInputStream getAudioInputStream(InputStream is) 158 throws UnsupportedAudioFileException, IOException 159 { 160 AudioFormat format = null; 161 162 try 163 { 164 format = GstAudioFileReaderNativePeer.getAudioFormat(is); 165 } 166 catch (Exception e) 167 { 168 // TODO Auto-generated catch block 169 e.printStackTrace(); 170 } 171 172 // get the header size 173 if (format == null) 174 throw new UnsupportedAudioFileException("Unsupported encoding."); 175 176 return new AudioInputStream(is, format, AudioSystem.NOT_SPECIFIED); 177 } 178 179 @Override getAudioInputStream(URL url)180 public AudioInputStream getAudioInputStream(URL url) 181 throws UnsupportedAudioFileException, IOException 182 { 183 return getAudioInputStream(new BufferedInputStream(url.openStream())); 184 } 185 } 186