1 /* 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.media.sound; 27 28 import java.io.BufferedInputStream; 29 import java.io.DataInputStream; 30 import java.io.File; 31 import java.io.FileInputStream; 32 import java.io.IOException; 33 import java.io.InputStream; 34 import java.net.URL; 35 36 import javax.sound.sampled.AudioFileFormat; 37 import javax.sound.sampled.AudioFormat; 38 import javax.sound.sampled.AudioInputStream; 39 import javax.sound.sampled.AudioSystem; 40 import javax.sound.sampled.UnsupportedAudioFileException; 41 42 43 /** 44 * AU file reader. 45 * 46 * @author Kara Kytle 47 * @author Jan Borgersen 48 * @author Florian Bomers 49 */ 50 public final class AuFileReader extends SunFileReader { 51 52 // METHODS TO IMPLEMENT AudioFileReader 53 54 /** 55 * Obtains the audio file format of the input stream provided. The stream must 56 * point to valid audio file data. In general, audio file providers may 57 * need to read some data from the stream before determining whether they 58 * support it. These parsers must 59 * be able to mark the stream, read enough data to determine whether they 60 * support the stream, and, if not, reset the stream's read pointer to its original 61 * position. If the input stream does not support this, this method may fail 62 * with an IOException. 63 * @param stream the input stream from which file format information should be 64 * extracted 65 * @return an <code>AudioFileFormat</code> object describing the audio file format 66 * @throws UnsupportedAudioFileException if the stream does not point to valid audio 67 * file data recognized by the system 68 * @throws IOException if an I/O exception occurs 69 * @see InputStream#markSupported 70 * @see InputStream#mark 71 */ getAudioFileFormat(InputStream stream)72 public AudioFileFormat getAudioFileFormat(InputStream stream) throws UnsupportedAudioFileException, IOException { 73 74 AudioFormat format = null; 75 AuFileFormat fileFormat = null; 76 int maxReadLength = 28; 77 boolean bigendian = false; 78 int magic = -1; 79 int headerSize = -1; 80 int dataSize = -1; 81 int encoding_local = -1; 82 int sampleRate = -1; 83 int frameRate = -1; 84 int frameSize = -1; 85 int channels = -1; 86 final int sampleSizeInBits; 87 int length = 0; 88 int nread = 0; 89 AudioFormat.Encoding encoding = null; 90 91 DataInputStream dis = new DataInputStream( stream ); 92 93 dis.mark(maxReadLength); 94 95 magic = dis.readInt(); 96 97 if (! (magic == AuFileFormat.AU_SUN_MAGIC) || (magic == AuFileFormat.AU_DEC_MAGIC) || 98 (magic == AuFileFormat.AU_SUN_INV_MAGIC) || (magic == AuFileFormat.AU_DEC_INV_MAGIC) ) { 99 100 // not AU, reset the stream, place into exception, throw exception 101 dis.reset(); 102 throw new UnsupportedAudioFileException("not an AU file"); 103 } 104 105 if ((magic == AuFileFormat.AU_SUN_MAGIC) || (magic == AuFileFormat.AU_DEC_MAGIC)) { 106 bigendian = true; // otherwise little-endian 107 } 108 109 headerSize = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; 110 dataSize = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; 111 encoding_local = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; 112 sampleRate = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; 113 channels = (bigendian==true ? dis.readInt() : rllong(dis) ); nread += 4; 114 if (channels <= 0) { 115 dis.reset(); 116 throw new UnsupportedAudioFileException("Invalid number of channels"); 117 } 118 119 frameRate = sampleRate; 120 121 switch (encoding_local) { 122 case AuFileFormat.AU_ULAW_8: 123 encoding = AudioFormat.Encoding.ULAW; 124 sampleSizeInBits = 8; 125 break; 126 case AuFileFormat.AU_ALAW_8: 127 encoding = AudioFormat.Encoding.ALAW; 128 sampleSizeInBits = 8; 129 break; 130 case AuFileFormat.AU_LINEAR_8: 131 // $$jb: 04.29.99: 8bit linear is *signed*, not *unsigned* 132 encoding = AudioFormat.Encoding.PCM_SIGNED; 133 sampleSizeInBits = 8; 134 break; 135 case AuFileFormat.AU_LINEAR_16: 136 encoding = AudioFormat.Encoding.PCM_SIGNED; 137 sampleSizeInBits = 16; 138 break; 139 case AuFileFormat.AU_LINEAR_24: 140 encoding = AudioFormat.Encoding.PCM_SIGNED; 141 142 sampleSizeInBits = 24; 143 break; 144 case AuFileFormat.AU_LINEAR_32: 145 encoding = AudioFormat.Encoding.PCM_SIGNED; 146 147 sampleSizeInBits = 32; 148 break; 149 // $jb: 03.19.99: we don't support these ... 150 /* case AuFileFormat.AU_FLOAT: 151 encoding = new AudioFormat.FLOAT; 152 sampleSizeInBits = 32; 153 break; 154 case AuFileFormat.AU_DOUBLE: 155 encoding = new AudioFormat.DOUBLE; 156 sampleSizeInBits = 8; 157 break; 158 case AuFileFormat.AU_ADPCM_G721: 159 encoding = new AudioFormat.G721_ADPCM; 160 sampleSizeInBits = 16; 161 break; 162 case AuFileFormat.AU_ADPCM_G723_3: 163 encoding = new AudioFormat.G723_3; 164 sampleSize = 24; 165 SamplePerUnit = 8; 166 break; 167 case AuFileFormat.AU_ADPCM_G723_5: 168 encoding = new AudioFormat.G723_5; 169 sampleSize = 40; 170 SamplePerUnit = 8; 171 break; 172 */ 173 default: 174 // unsupported filetype, throw exception 175 dis.reset(); 176 throw new UnsupportedAudioFileException("not a valid AU file"); 177 } 178 179 frameSize = calculatePCMFrameSize(sampleSizeInBits, channels); 180 //$$fb 2002-11-02: fix for 4629669: AU file reader: problems with empty files 181 if( dataSize < 0 ) { 182 length = AudioSystem.NOT_SPECIFIED; 183 } else { 184 //$$fb 2003-10-20: fix for 4940459: AudioInputStream.getFrameLength() returns 0 instead of NOT_SPECIFIED 185 length = dataSize / frameSize; 186 } 187 188 format = new AudioFormat( encoding, (float)sampleRate, sampleSizeInBits, 189 channels, frameSize, (float)frameRate, bigendian); 190 191 fileFormat = new AuFileFormat( AudioFileFormat.Type.AU, dataSize+headerSize, 192 format, length); 193 194 dis.reset(); // Throws IOException 195 return fileFormat; 196 197 } 198 199 200 /** 201 * Obtains the audio file format of the URL provided. The URL must 202 * point to valid audio file data. 203 * @param url the URL from which file format information should be 204 * extracted 205 * @return an <code>AudioFileFormat</code> object describing the audio file format 206 * @throws UnsupportedAudioFileException if the URL does not point to valid audio 207 * file data recognized by the system 208 * @throws IOException if an I/O exception occurs 209 */ getAudioFileFormat(URL url)210 public AudioFileFormat getAudioFileFormat(URL url) throws UnsupportedAudioFileException, IOException { 211 212 InputStream urlStream = null; 213 BufferedInputStream bis = null; 214 AudioFileFormat fileFormat = null; 215 AudioFormat format = null; 216 217 urlStream = url.openStream(); // throws IOException 218 219 try { 220 bis = new BufferedInputStream( urlStream, bisBufferSize ); 221 222 fileFormat = getAudioFileFormat( bis ); // throws UnsupportedAudioFileException 223 } finally { 224 urlStream.close(); 225 } 226 227 return fileFormat; 228 } 229 230 231 /** 232 * Obtains the audio file format of the File provided. The File must 233 * point to valid audio file data. 234 * @param file the File from which file format information should be 235 * extracted 236 * @return an <code>AudioFileFormat</code> object describing the audio file format 237 * @throws UnsupportedAudioFileException if the File does not point to valid audio 238 * file data recognized by the system 239 * @throws IOException if an I/O exception occurs 240 */ getAudioFileFormat(File file)241 public AudioFileFormat getAudioFileFormat(File file) throws UnsupportedAudioFileException, IOException { 242 243 FileInputStream fis = null; 244 BufferedInputStream bis = null; 245 AudioFileFormat fileFormat = null; 246 AudioFormat format = null; 247 248 fis = new FileInputStream( file ); // throws IOException 249 // part of fix for 4325421 250 try { 251 bis = new BufferedInputStream( fis, bisBufferSize ); 252 fileFormat = getAudioFileFormat( bis ); // throws UnsupportedAudioFileException 253 } finally { 254 fis.close(); 255 } 256 257 return fileFormat; 258 } 259 260 261 /** 262 * Obtains an audio stream from the input stream provided. The stream must 263 * point to valid audio file data. In general, audio file providers may 264 * need to read some data from the stream before determining whether they 265 * support it. These parsers must 266 * be able to mark the stream, read enough data to determine whether they 267 * support the stream, and, if not, reset the stream's read pointer to its original 268 * position. If the input stream does not support this, this method may fail 269 * with an IOException. 270 * @param stream the input stream from which the <code>AudioInputStream</code> should be 271 * constructed 272 * @return an <code>AudioInputStream</code> object based on the audio file data contained 273 * in the input stream. 274 * @throws UnsupportedAudioFileException if the stream does not point to valid audio 275 * file data recognized by the system 276 * @throws IOException if an I/O exception occurs 277 * @see InputStream#markSupported 278 * @see InputStream#mark 279 */ getAudioInputStream(InputStream stream)280 public AudioInputStream getAudioInputStream(InputStream stream) throws UnsupportedAudioFileException, IOException { 281 282 DataInputStream dis = null; 283 int headerSize; 284 AudioFileFormat fileFormat = null; 285 AudioFormat format = null; 286 287 288 fileFormat = getAudioFileFormat( stream ); // throws UnsupportedAudioFileException, IOException 289 290 // if we passed this call, we have an AU file. 291 292 format = fileFormat.getFormat(); 293 294 dis = new DataInputStream(stream); 295 296 // now seek past the header 297 298 dis.readInt(); // magic 299 headerSize = (format.isBigEndian()==true ? dis.readInt() : rllong(dis) ); 300 dis.skipBytes( headerSize - 8 ); 301 302 303 // we've got everything, and the stream should be at the 304 // beginning of the data chunk, so return an AudioInputStream. 305 306 return new AudioInputStream(dis, format, fileFormat.getFrameLength()); 307 } 308 309 310 /** 311 * Obtains an audio stream from the URL provided. The URL must 312 * point to valid audio file data. 313 * @param url the URL for which the <code>AudioInputStream</code> should be 314 * constructed 315 * @return an <code>AudioInputStream</code> object based on the audio file data pointed 316 * to by the URL 317 * @throws UnsupportedAudioFileException if the URL does not point to valid audio 318 * file data recognized by the system 319 * @throws IOException if an I/O exception occurs 320 */ getAudioInputStream(URL url)321 public AudioInputStream getAudioInputStream(URL url) throws UnsupportedAudioFileException, IOException { 322 323 InputStream urlStream = null; 324 BufferedInputStream bis = null; 325 AudioFileFormat fileFormat = null; 326 327 urlStream = url.openStream(); // throws IOException 328 AudioInputStream result = null; 329 try { 330 bis = new BufferedInputStream( urlStream, bisBufferSize ); 331 result = getAudioInputStream( (InputStream)bis ); 332 } finally { 333 if (result == null) { 334 urlStream.close(); 335 } 336 } 337 return result; 338 } 339 340 341 /** 342 * Obtains an audio stream from the File provided. The File must 343 * point to valid audio file data. 344 * @param file the File for which the <code>AudioInputStream</code> should be 345 * constructed 346 * @return an <code>AudioInputStream</code> object based on the audio file data pointed 347 * to by the File 348 * @throws UnsupportedAudioFileException if the File does not point to valid audio 349 * file data recognized by the system 350 * @throws IOException if an I/O exception occurs 351 */ getAudioInputStream(File file)352 public AudioInputStream getAudioInputStream(File file) throws UnsupportedAudioFileException, IOException { 353 354 FileInputStream fis = null; 355 BufferedInputStream bis = null; 356 AudioFileFormat fileFormat = null; 357 358 fis = new FileInputStream( file ); // throws IOException 359 AudioInputStream result = null; 360 // part of fix for 4325421 361 try { 362 bis = new BufferedInputStream( fis, bisBufferSize ); 363 result = getAudioInputStream( (InputStream)bis ); 364 } finally { 365 if (result == null) { 366 fis.close(); 367 } 368 } 369 370 return result; 371 } 372 } 373