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| 1 | /* | ||
| 2 | * Copyright (c) 1999, 2011, 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 javax.sound.sampled; | ||
| 27 | |||
| 28 | import java.io.File; | ||
| 29 | import java.io.InputStream; | ||
| 30 | import java.io.IOException; | ||
| 31 | import java.io.OutputStream; | ||
| 32 | import java.net.URL; | ||
| 33 | |||
| 34 | import java.util.HashSet; | ||
| 35 | import java.util.List; | ||
| 36 | import java.util.Set; | ||
| 37 | import java.util.Vector; | ||
| 38 | import java.util.ArrayList; | ||
| 39 | |||
| 40 | import javax.sound.sampled.spi.AudioFileWriter; | ||
| 41 | import javax.sound.sampled.spi.AudioFileReader; | ||
| 42 | import javax.sound.sampled.spi.FormatConversionProvider; | ||
| 43 | import javax.sound.sampled.spi.MixerProvider; | ||
| 44 | |||
| 45 | import com.sun.media.sound.JDK13Services; | ||
| 46 | |||
| 47 | /* $fb TODO: | ||
| 48 | * - consistent usage of (typed) collections | ||
| 49 | */ | ||
| 50 | |||
| 51 | |||
| 52 | /** | ||
| 53 | * The <code>AudioSystem</code> class acts as the entry point to the | ||
| 54 | * sampled-audio system resources. This class lets you query and | ||
| 55 | * access the mixers that are installed on the system. | ||
| 56 | * <code>AudioSystem</code> includes a number of | ||
| 57 | * methods for converting audio data between different formats, and for | ||
| 58 | * translating between audio files and streams. It also provides a method | ||
| 59 | * for obtaining a <code>{@link Line}</code> directly from the | ||
| 60 | * <code>AudioSystem</code> without dealing explicitly | ||
| 61 | * with mixers. | ||
| 62 | * | ||
| 63 | * <p>Properties can be used to specify the default mixer | ||
| 64 | * for specific line types. | ||
| 65 | * Both system properties and a properties file are considered. | ||
| 66 | * In the Oracle reference implementation, the properties file is | ||
| 67 | * "lib/sound.properties" in the JRE | ||
| 68 | * directory. If a property exists both as a system property and in the | ||
| 69 | * properties file, the system property takes precedence. If none is | ||
| 70 | * specified, a suitable default is chosen among the available devices. | ||
| 71 | * The syntax of the properties file is specified in | ||
| 72 | * {@link java.util.Properties#load(InputStream) Properties.load}. The | ||
| 73 | * following table lists the available property keys and which methods | ||
| 74 | * consider them: | ||
| 75 | * | ||
| 76 | * <table border=0> | ||
| 77 | * <tr> | ||
| 78 | * <th>Property Key</th> | ||
| 79 | * <th>Interface</th> | ||
| 80 | * <th>Affected Method(s)</th> | ||
| 81 | * </tr> | ||
| 82 | * <tr> | ||
| 83 | * <td><code>javax.sound.sampled.Clip</code></td> | ||
| 84 | * <td>{@link Clip}</td> | ||
| 85 | * <td>{@link #getLine}, {@link #getClip}</td> | ||
| 86 | * </tr> | ||
| 87 | * <tr> | ||
| 88 | * <td><code>javax.sound.sampled.Port</code></td> | ||
| 89 | * <td>{@link Port}</td> | ||
| 90 | * <td>{@link #getLine}</td> | ||
| 91 | * </tr> | ||
| 92 | * <tr> | ||
| 93 | * <td><code>javax.sound.sampled.SourceDataLine</code></td> | ||
| 94 | * <td>{@link SourceDataLine}</td> | ||
| 95 | * <td>{@link #getLine}, {@link #getSourceDataLine}</td> | ||
| 96 | * </tr> | ||
| 97 | * <tr> | ||
| 98 | * <td><code>javax.sound.sampled.TargetDataLine</code></td> | ||
| 99 | * <td>{@link TargetDataLine}</td> | ||
| 100 | * <td>{@link #getLine}, {@link #getTargetDataLine}</td> | ||
| 101 | * </tr> | ||
| 102 | * </table> | ||
| 103 | * | ||
| 104 | * The property value consists of the provider class name | ||
| 105 | * and the mixer name, separated by the hash mark ("#"). | ||
| 106 | * The provider class name is the fully-qualified | ||
| 107 | * name of a concrete {@link javax.sound.sampled.spi.MixerProvider | ||
| 108 | * mixer provider} class. The mixer name is matched against | ||
| 109 | * the <code>String</code> returned by the <code>getName</code> | ||
| 110 | * method of <code>Mixer.Info</code>. | ||
| 111 | * Either the class name, or the mixer name may be omitted. | ||
| 112 | * If only the class name is specified, the trailing hash mark | ||
| 113 | * is optional. | ||
| 114 | * | ||
| 115 | * <p>If the provider class is specified, and it can be | ||
| 116 | * successully retrieved from the installed providers, the list of | ||
| 117 | * <code>Mixer.Info</code> objects is retrieved | ||
| 118 | * from the provider. Otherwise, or when these mixers | ||
| 119 | * do not provide a subsequent match, the list is retrieved | ||
| 120 | * from {@link #getMixerInfo} to contain | ||
| 121 | * all available <code>Mixer.Info</code> objects. | ||
| 122 | * | ||
| 123 | * <p>If a mixer name is specified, the resulting list of | ||
| 124 | * <code>Mixer.Info</code> objects is searched: | ||
| 125 | * the first one with a matching name, and whose | ||
| 126 | * <code>Mixer</code> provides the | ||
| 127 | * respective line interface, will be returned. | ||
| 128 | * If no matching <code>Mixer.Info</code> object | ||
| 129 | * is found, or the mixer name is not specified, | ||
| 130 | * the first mixer from the resulting | ||
| 131 | * list, which provides the respective line | ||
| 132 | * interface, will be returned. | ||
| 133 | * | ||
| 134 | * For example, the property <code>javax.sound.sampled.Clip</code> | ||
| 135 | * with a value | ||
| 136 | * <code>"com.sun.media.sound.MixerProvider#SunClip"</code> | ||
| 137 | * will have the following consequences when | ||
| 138 | * <code>getLine</code> is called requesting a <code>Clip</code> | ||
| 139 | * instance: | ||
| 140 | * if the class <code>com.sun.media.sound.MixerProvider</code> exists | ||
| 141 | * in the list of installed mixer providers, | ||
| 142 | * the first <code>Clip</code> from the first mixer with name | ||
| 143 | * <code>"SunClip"</code> will be returned. If it cannot | ||
| 144 | * be found, the first <code>Clip</code> from the first mixer | ||
| 145 | * of the specified provider will be returned, regardless of name. | ||
| 146 | * If there is none, the first <code>Clip</code> from the first | ||
| 147 | * <code>Mixer</code> with name | ||
| 148 | * <code>"SunClip"</code> in the list of all mixers | ||
| 149 | * (as returned by <code>getMixerInfo</code>) will be returned, | ||
| 150 | * or, if not found, the first <code>Clip</code> of the first | ||
| 151 | * <code>Mixer</code>that can be found in the list of all | ||
| 152 | * mixers is returned. | ||
| 153 | * If that fails, too, an <code>IllegalArgumentException</code> | ||
| 154 | * is thrown. | ||
| 155 | * | ||
| 156 | * @author Kara Kytle | ||
| 157 | * @author Florian Bomers | ||
| 158 | * @author Matthias Pfisterer | ||
| 159 | * @author Kevin P. Smith | ||
| 160 | * | ||
| 161 | * @see AudioFormat | ||
| 162 | * @see AudioInputStream | ||
| 163 | * @see Mixer | ||
| 164 | * @see Line | ||
| 165 | * @see Line.Info | ||
| 166 | * @since 1.3 | ||
| 167 | */ | ||
| 168 | public class AudioSystem { | ||
| 169 | |||
| 170 | /** | ||
| 171 | * An integer that stands for an unknown numeric value. | ||
| 172 | * This value is appropriate only for signed quantities that do not | ||
| 173 | * normally take negative values. Examples include file sizes, frame | ||
| 174 | * sizes, buffer sizes, and sample rates. | ||
| 175 | * A number of Java Sound constructors accept | ||
| 176 | * a value of <code>NOT_SPECIFIED</code> for such parameters. Other | ||
| 177 | * methods may also accept or return this value, as documented. | ||
| 178 | */ | ||
| 179 | public static final int NOT_SPECIFIED = -1; | ||
| 180 | |||
| 181 | /** | ||
| 182 | * Private no-args constructor for ensuring against instantiation. | ||
| 183 | */ | ||
| 184 | private AudioSystem() { | ||
| 185 | } | ||
| 186 | |||
| 187 | |||
| 188 | /** | ||
| 189 | * Obtains an array of mixer info objects that represents | ||
| 190 | * the set of audio mixers that are currently installed on the system. | ||
| 191 | * @return an array of info objects for the currently installed mixers. If no mixers | ||
| 192 | * are available on the system, an array of length 0 is returned. | ||
| 193 | * @see #getMixer | ||
| 194 | */ | ||
| 195 | public static Mixer.Info[] getMixerInfo() { | ||
| 196 | |||
| 197 | List infos = getMixerInfoList(); | ||
| 198 | Mixer.Info[] allInfos = (Mixer.Info[]) infos.toArray(new Mixer.Info[infos.size()]); | ||
| 199 | return allInfos; | ||
| 200 | } | ||
| 201 | |||
| 202 | |||
| 203 | /** | ||
| 204 | * Obtains the requested audio mixer. | ||
| 205 | * @param info a <code>Mixer.Info</code> object representing the desired | ||
| 206 | * mixer, or <code>null</code> for the system default mixer | ||
| 207 | * @return the requested mixer | ||
| 208 | * @throws SecurityException if the requested mixer | ||
| 209 | * is unavailable because of security restrictions | ||
| 210 | * @throws IllegalArgumentException if the info object does not represent | ||
| 211 | * a mixer installed on the system | ||
| 212 | * @see #getMixerInfo | ||
| 213 | */ | ||
| 214 | public static Mixer getMixer(Mixer.Info info) { | ||
| 215 | |||
| 216 | Mixer mixer = null; | ||
| 217 | List providers = getMixerProviders(); | ||
| 218 | |||
| 219 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 220 | |||
| 221 | try { | ||
| 222 | return ((MixerProvider)providers.get(i)).getMixer(info); | ||
| 223 | |||
| 224 | } catch (IllegalArgumentException e) { | ||
| 225 | } catch (NullPointerException e) { | ||
| 226 | // $$jb 08.20.99: If the strings in the info object aren't | ||
| 227 | // set, then Netscape (using jdk1.1.5) tends to throw | ||
| 228 | // NPE's when doing some string manipulation. This is | ||
| 229 | // probably not the best fix, but is solves the problem | ||
| 230 | // of the NPE in Netscape using local classes | ||
| 231 | // $$jb 11.01.99: Replacing this patch. | ||
| 232 | } | ||
| 233 | } | ||
| 234 | |||
| 235 | //$$fb if looking for default mixer, and not found yet, add a round of looking | ||
| 236 | if (info == null) { | ||
| 237 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 238 | try { | ||
| 239 | MixerProvider provider = (MixerProvider) providers.get(i); | ||
| 240 | Mixer.Info[] infos = provider.getMixerInfo(); | ||
| 241 | // start from 0 to last device (do not reverse this order) | ||
| 242 | for (int ii = 0; ii < infos.length; ii++) { | ||
| 243 | try { | ||
| 244 | return provider.getMixer(infos[ii]); | ||
| 245 | } catch (IllegalArgumentException e) { | ||
| 246 | // this is not a good default device :) | ||
| 247 | } | ||
| 248 | } | ||
| 249 | } catch (IllegalArgumentException e) { | ||
| 250 | } catch (NullPointerException e) { | ||
| 251 | } | ||
| 252 | } | ||
| 253 | } | ||
| 254 | |||
| 255 | |||
| 256 | throw new IllegalArgumentException("Mixer not supported: " | ||
| 257 | + (info!=null?info.toString():"null")); | ||
| 258 | } | ||
| 259 | |||
| 260 | |||
| 261 | //$$fb 2002-11-26: fix for 4757930: DOC: AudioSystem.getTarget/SourceLineInfo() is ambiguous | ||
| 262 | /** | ||
| 263 | * Obtains information about all source lines of a particular type that are supported | ||
| 264 | * by the installed mixers. | ||
| 265 | * @param info a <code>Line.Info</code> object that specifies the kind of | ||
| 266 | * lines about which information is requested | ||
| 267 | * @return an array of <code>Line.Info</code> objects describing source lines matching | ||
| 268 | * the type requested. If no matching source lines are supported, an array of length 0 | ||
| 269 | * is returned. | ||
| 270 | * | ||
| 271 | * @see Mixer#getSourceLineInfo(Line.Info) | ||
| 272 | */ | ||
| 273 | public static Line.Info[] getSourceLineInfo(Line.Info info) { | ||
| 274 | |||
| 275 | Vector vector = new Vector(); | ||
| 276 | Line.Info[] currentInfoArray; | ||
| 277 | |||
| 278 | Mixer mixer; | ||
| 279 | Line.Info fullInfo = null; | ||
| 280 | Mixer.Info[] infoArray = getMixerInfo(); | ||
| 281 | |||
| 282 | for (int i = 0; i < infoArray.length; i++) { | ||
| 283 | |||
| 284 | mixer = getMixer(infoArray[i]); | ||
| 285 | |||
| 286 | currentInfoArray = mixer.getSourceLineInfo(info); | ||
| 287 | for (int j = 0; j < currentInfoArray.length; j++) { | ||
| 288 | vector.addElement(currentInfoArray[j]); | ||
| 289 | } | ||
| 290 | } | ||
| 291 | |||
| 292 | Line.Info[] returnedArray = new Line.Info[vector.size()]; | ||
| 293 | |||
| 294 | for (int i = 0; i < returnedArray.length; i++) { | ||
| 295 | returnedArray[i] = (Line.Info)vector.get(i); | ||
| 296 | } | ||
| 297 | |||
| 298 | return returnedArray; | ||
| 299 | } | ||
| 300 | |||
| 301 | |||
| 302 | /** | ||
| 303 | * Obtains information about all target lines of a particular type that are supported | ||
| 304 | * by the installed mixers. | ||
| 305 | * @param info a <code>Line.Info</code> object that specifies the kind of | ||
| 306 | * lines about which information is requested | ||
| 307 | * @return an array of <code>Line.Info</code> objects describing target lines matching | ||
| 308 | * the type requested. If no matching target lines are supported, an array of length 0 | ||
| 309 | * is returned. | ||
| 310 | * | ||
| 311 | * @see Mixer#getTargetLineInfo(Line.Info) | ||
| 312 | */ | ||
| 313 | public static Line.Info[] getTargetLineInfo(Line.Info info) { | ||
| 314 | |||
| 315 | Vector vector = new Vector(); | ||
| 316 | Line.Info[] currentInfoArray; | ||
| 317 | |||
| 318 | Mixer mixer; | ||
| 319 | Line.Info fullInfo = null; | ||
| 320 | Mixer.Info[] infoArray = getMixerInfo(); | ||
| 321 | |||
| 322 | for (int i = 0; i < infoArray.length; i++) { | ||
| 323 | |||
| 324 | mixer = getMixer(infoArray[i]); | ||
| 325 | |||
| 326 | currentInfoArray = mixer.getTargetLineInfo(info); | ||
| 327 | for (int j = 0; j < currentInfoArray.length; j++) { | ||
| 328 | vector.addElement(currentInfoArray[j]); | ||
| 329 | } | ||
| 330 | } | ||
| 331 | |||
| 332 | Line.Info[] returnedArray = new Line.Info[vector.size()]; | ||
| 333 | |||
| 334 | for (int i = 0; i < returnedArray.length; i++) { | ||
| 335 | returnedArray[i] = (Line.Info)vector.get(i); | ||
| 336 | } | ||
| 337 | |||
| 338 | return returnedArray; | ||
| 339 | } | ||
| 340 | |||
| 341 | |||
| 342 | /** | ||
| 343 | * Indicates whether the system supports any lines that match | ||
| 344 | * the specified <code>Line.Info</code> object. A line is supported if | ||
| 345 | * any installed mixer supports it. | ||
| 346 | * @param info a <code>Line.Info</code> object describing the line for which support is queried | ||
| 347 | * @return <code>true</code> if at least one matching line is | ||
| 348 | * supported, otherwise <code>false</code> | ||
| 349 | * | ||
| 350 | * @see Mixer#isLineSupported(Line.Info) | ||
| 351 | */ | ||
| 352 | public static boolean isLineSupported(Line.Info info) { | ||
| 353 | |||
| 354 | Mixer mixer; | ||
| 355 | Mixer.Info[] infoArray = getMixerInfo(); | ||
| 356 | |||
| 357 | for (int i = 0; i < infoArray.length; i++) { | ||
| 358 | |||
| 359 | if( infoArray[i] != null ) { | ||
| 360 | mixer = getMixer(infoArray[i]); | ||
| 361 | if (mixer.isLineSupported(info)) { | ||
| 362 | return true; | ||
| 363 | } | ||
| 364 | } | ||
| 365 | } | ||
| 366 | |||
| 367 | return false; | ||
| 368 | } | ||
| 369 | |||
| 370 | /** | ||
| 371 | * Obtains a line that matches the description in the specified | ||
| 372 | * <code>Line.Info</code> object. | ||
| 373 | * | ||
| 374 | * <p>If a <code>DataLine</code> is requested, and <code>info</code> | ||
| 375 | * is an instance of <code>DataLine.Info</code> specifying at least | ||
| 376 | * one fully qualified audio format, the last one | ||
| 377 | * will be used as the default format of the returned | ||
| 378 | * <code>DataLine</code>. | ||
| 379 | * | ||
| 380 | * <p>If system properties | ||
| 381 | * <code>javax.sound.sampled.Clip</code>, | ||
| 382 | * <code>javax.sound.sampled.Port</code>, | ||
| 383 | * <code>javax.sound.sampled.SourceDataLine</code> and | ||
| 384 | * <code>javax.sound.sampled.TargetDataLine</code> are defined | ||
| 385 | * or they are defined in the file "sound.properties", | ||
| 386 | * they are used to retrieve default lines. | ||
| 387 | * For details, refer to the {@link AudioSystem class description}. | ||
| 388 | * | ||
| 389 | * If the respective property is not set, or the mixer | ||
| 390 | * requested in the property is not installed or does not provide the | ||
| 391 | * requested line, all installed mixers are queried for the | ||
| 392 | * requested line type. A Line will be returned from the first mixer | ||
| 393 | * providing the requested line type. | ||
| 394 | * | ||
| 395 | * @param info a <code>Line.Info</code> object describing the desired kind of line | ||
| 396 | * @return a line of the requested kind | ||
| 397 | * | ||
| 398 | * @throws LineUnavailableException if a matching line | ||
| 399 | * is not available due to resource restrictions | ||
| 400 | * @throws SecurityException if a matching line | ||
| 401 | * is not available due to security restrictions | ||
| 402 | * @throws IllegalArgumentException if the system does not | ||
| 403 | * support at least one line matching the specified | ||
| 404 | * <code>Line.Info</code> object | ||
| 405 | * through any installed mixer | ||
| 406 | */ | ||
| 407 | public static Line getLine(Line.Info info) throws LineUnavailableException { | ||
| 408 | LineUnavailableException lue = null; | ||
| 409 | List providers = getMixerProviders(); | ||
| 410 | |||
| 411 | |||
| 412 | // 1: try from default mixer for this line class | ||
| 413 | try { | ||
| 414 | Mixer mixer = getDefaultMixer(providers, info); | ||
| 415 | if (mixer != null && mixer.isLineSupported(info)) { | ||
| 416 | return mixer.getLine(info); | ||
| 417 | } | ||
| 418 | } catch (LineUnavailableException e) { | ||
| 419 | lue = e; | ||
| 420 | } catch (IllegalArgumentException iae) { | ||
| 421 | // must not happen... but better to catch it here, | ||
| 422 | // if plug-ins are badly written | ||
| 423 | } | ||
| 424 | |||
| 425 | |||
| 426 | // 2: if that doesn't work, try to find any mixing mixer | ||
| 427 | for(int i = 0; i < providers.size(); i++) { | ||
| 428 | MixerProvider provider = (MixerProvider) providers.get(i); | ||
| 429 | Mixer.Info[] infos = provider.getMixerInfo(); | ||
| 430 | |||
| 431 | for (int j = 0; j < infos.length; j++) { | ||
| 432 | try { | ||
| 433 | Mixer mixer = provider.getMixer(infos[j]); | ||
| 434 | // see if this is an appropriate mixer which can mix | ||
| 435 | if (isAppropriateMixer(mixer, info, true)) { | ||
| 436 | return mixer.getLine(info); | ||
| 437 | } | ||
| 438 | } catch (LineUnavailableException e) { | ||
| 439 | lue = e; | ||
| 440 | } catch (IllegalArgumentException iae) { | ||
| 441 | // must not happen... but better to catch it here, | ||
| 442 | // if plug-ins are badly written | ||
| 443 | } | ||
| 444 | } | ||
| 445 | } | ||
| 446 | |||
| 447 | |||
| 448 | // 3: if that didn't work, try to find any non-mixing mixer | ||
| 449 | for(int i = 0; i < providers.size(); i++) { | ||
| 450 | MixerProvider provider = (MixerProvider) providers.get(i); | ||
| 451 | Mixer.Info[] infos = provider.getMixerInfo(); | ||
| 452 | for (int j = 0; j < infos.length; j++) { | ||
| 453 | try { | ||
| 454 | Mixer mixer = provider.getMixer(infos[j]); | ||
| 455 | // see if this is an appropriate mixer which can mix | ||
| 456 | if (isAppropriateMixer(mixer, info, false)) { | ||
| 457 | return mixer.getLine(info); | ||
| 458 | } | ||
| 459 | } catch (LineUnavailableException e) { | ||
| 460 | lue = e; | ||
| 461 | } catch (IllegalArgumentException iae) { | ||
| 462 | // must not happen... but better to catch it here, | ||
| 463 | // if plug-ins are badly written | ||
| 464 | } | ||
| 465 | } | ||
| 466 | } | ||
| 467 | |||
| 468 | // if this line was supported but was not available, throw the last | ||
| 469 | // LineUnavailableException we got (??). | ||
| 470 | if (lue != null) { | ||
| 471 | throw lue; | ||
| 472 | } | ||
| 473 | |||
| 474 | // otherwise, the requested line was not supported, so throw | ||
| 475 | // an Illegal argument exception | ||
| 476 | throw new IllegalArgumentException("No line matching " + | ||
| 477 | info.toString() + " is supported."); | ||
| 478 | } | ||
| 479 | |||
| 480 | |||
| 481 | /** | ||
| 482 | * Obtains a clip that can be used for playing back | ||
| 483 | * an audio file or an audio stream. The returned clip | ||
| 484 | * will be provided by the default system mixer, or, | ||
| 485 | * if not possible, by any other mixer installed in the | ||
| 486 | * system that supports a <code>Clip</code> | ||
| 487 | * object. | ||
| 488 | * | ||
| 489 | * <p>The returned clip must be opened with the | ||
| 490 | * <code>open(AudioFormat)</code> or | ||
| 491 | * <code>open(AudioInputStream)</code> method. | ||
| 492 | * | ||
| 493 | * <p>This is a high-level method that uses <code>getMixer</code> | ||
| 494 | * and <code>getLine</code> internally. | ||
| 495 | * | ||
| 496 | * <p>If the system property | ||
| 497 | * <code>javax.sound.sampled.Clip</code> | ||
| 498 | * is defined or it is defined in the file "sound.properties", | ||
| 499 | * it is used to retrieve the default clip. | ||
| 500 | * For details, refer to the {@link AudioSystem class description}. | ||
| 501 | * | ||
| 502 | * @return the desired clip object | ||
| 503 | * | ||
| 504 | * @throws LineUnavailableException if a clip object | ||
| 505 | * is not available due to resource restrictions | ||
| 506 | * @throws SecurityException if a clip object | ||
| 507 | * is not available due to security restrictions | ||
| 508 | * @throws IllegalArgumentException if the system does not | ||
| 509 | * support at least one clip instance through any installed mixer | ||
| 510 | * | ||
| 511 | * @see #getClip(Mixer.Info) | ||
| 512 | * @since 1.5 | ||
| 513 | */ | ||
| 514 | public static Clip getClip() throws LineUnavailableException{ | ||
| 515 | AudioFormat format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, | ||
| 516 | AudioSystem.NOT_SPECIFIED, | ||
| 517 | 16, 2, 4, | ||
| 518 | AudioSystem.NOT_SPECIFIED, true); | ||
| 519 | DataLine.Info info = new DataLine.Info(Clip.class, format); | ||
| 520 | return (Clip) AudioSystem.getLine(info); | ||
| 521 | } | ||
| 522 | |||
| 523 | |||
| 524 | /** | ||
| 525 | * Obtains a clip from the specified mixer that can be | ||
| 526 | * used for playing back an audio file or an audio stream. | ||
| 527 | * | ||
| 528 | * <p>The returned clip must be opened with the | ||
| 529 | * <code>open(AudioFormat)</code> or | ||
| 530 | * <code>open(AudioInputStream)</code> method. | ||
| 531 | * | ||
| 532 | * <p>This is a high-level method that uses <code>getMixer</code> | ||
| 533 | * and <code>getLine</code> internally. | ||
| 534 | * | ||
| 535 | * @param mixerInfo a <code>Mixer.Info</code> object representing the | ||
| 536 | * desired mixer, or <code>null</code> for the system default mixer | ||
| 537 | * @return a clip object from the specified mixer | ||
| 538 | * | ||
| 539 | * @throws LineUnavailableException if a clip | ||
| 540 | * is not available from this mixer due to resource restrictions | ||
| 541 | * @throws SecurityException if a clip | ||
| 542 | * is not available from this mixer due to security restrictions | ||
| 543 | * @throws IllegalArgumentException if the system does not | ||
| 544 | * support at least one clip through the specified mixer | ||
| 545 | * | ||
| 546 | * @see #getClip() | ||
| 547 | * @since 1.5 | ||
| 548 | */ | ||
| 549 | public static Clip getClip(Mixer.Info mixerInfo) throws LineUnavailableException{ | ||
| 550 | AudioFormat format = new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, | ||
| 551 | AudioSystem.NOT_SPECIFIED, | ||
| 552 | 16, 2, 4, | ||
| 553 | AudioSystem.NOT_SPECIFIED, true); | ||
| 554 | DataLine.Info info = new DataLine.Info(Clip.class, format); | ||
| 555 | Mixer mixer = AudioSystem.getMixer(mixerInfo); | ||
| 556 | return (Clip) mixer.getLine(info); | ||
| 557 | } | ||
| 558 | |||
| 559 | |||
| 560 | /** | ||
| 561 | * Obtains a source data line that can be used for playing back | ||
| 562 | * audio data in the format specified by the | ||
| 563 | * <code>AudioFormat</code> object. The returned line | ||
| 564 | * will be provided by the default system mixer, or, | ||
| 565 | * if not possible, by any other mixer installed in the | ||
| 566 | * system that supports a matching | ||
| 567 | * <code>SourceDataLine</code> object. | ||
| 568 | * | ||
| 569 | * <p>The returned line should be opened with the | ||
| 570 | * <code>open(AudioFormat)</code> or | ||
| 571 | * <code>open(AudioFormat, int)</code> method. | ||
| 572 | * | ||
| 573 | * <p>This is a high-level method that uses <code>getMixer</code> | ||
| 574 | * and <code>getLine</code> internally. | ||
| 575 | * | ||
| 576 | * <p>The returned <code>SourceDataLine</code>'s default | ||
| 577 | * audio format will be initialized with <code>format</code>. | ||
| 578 | * | ||
| 579 | * <p>If the system property | ||
| 580 | * <code>javax.sound.sampled.SourceDataLine</code> | ||
| 581 | * is defined or it is defined in the file "sound.properties", | ||
| 582 | * it is used to retrieve the default source data line. | ||
| 583 | * For details, refer to the {@link AudioSystem class description}. | ||
| 584 | * | ||
| 585 | * @param format an <code>AudioFormat</code> object specifying | ||
| 586 | * the supported audio format of the returned line, | ||
| 587 | * or <code>null</code> for any audio format | ||
| 588 | * @return the desired <code>SourceDataLine</code> object | ||
| 589 | * | ||
| 590 | * @throws LineUnavailableException if a matching source data line | ||
| 591 | * is not available due to resource restrictions | ||
| 592 | * @throws SecurityException if a matching source data line | ||
| 593 | * is not available due to security restrictions | ||
| 594 | * @throws IllegalArgumentException if the system does not | ||
| 595 | * support at least one source data line supporting the | ||
| 596 | * specified audio format through any installed mixer | ||
| 597 | * | ||
| 598 | * @see #getSourceDataLine(AudioFormat, Mixer.Info) | ||
| 599 | * @since 1.5 | ||
| 600 | */ | ||
| 601 | public static SourceDataLine getSourceDataLine(AudioFormat format) | ||
| 602 | throws LineUnavailableException{ | ||
| 603 | DataLine.Info info = new DataLine.Info(SourceDataLine.class, format); | ||
| 604 | return (SourceDataLine) AudioSystem.getLine(info); | ||
| 605 | } | ||
| 606 | |||
| 607 | |||
| 608 | /** | ||
| 609 | * Obtains a source data line that can be used for playing back | ||
| 610 | * audio data in the format specified by the | ||
| 611 | * <code>AudioFormat</code> object, provided by the mixer | ||
| 612 | * specified by the <code>Mixer.Info</code> object. | ||
| 613 | * | ||
| 614 | * <p>The returned line should be opened with the | ||
| 615 | * <code>open(AudioFormat)</code> or | ||
| 616 | * <code>open(AudioFormat, int)</code> method. | ||
| 617 | * | ||
| 618 | * <p>This is a high-level method that uses <code>getMixer</code> | ||
| 619 | * and <code>getLine</code> internally. | ||
| 620 | * | ||
| 621 | * <p>The returned <code>SourceDataLine</code>'s default | ||
| 622 | * audio format will be initialized with <code>format</code>. | ||
| 623 | * | ||
| 624 | * @param format an <code>AudioFormat</code> object specifying | ||
| 625 | * the supported audio format of the returned line, | ||
| 626 | * or <code>null</code> for any audio format | ||
| 627 | * @param mixerinfo a <code>Mixer.Info</code> object representing | ||
| 628 | * the desired mixer, or <code>null</code> for the system | ||
| 629 | * default mixer | ||
| 630 | * @return the desired <code>SourceDataLine</code> object | ||
| 631 | * | ||
| 632 | * @throws LineUnavailableException if a matching source data | ||
| 633 | * line is not available from the specified mixer due | ||
| 634 | * to resource restrictions | ||
| 635 | * @throws SecurityException if a matching source data line | ||
| 636 | * is not available from the specified mixer due to | ||
| 637 | * security restrictions | ||
| 638 | * @throws IllegalArgumentException if the specified mixer does | ||
| 639 | * not support at least one source data line supporting | ||
| 640 | * the specified audio format | ||
| 641 | * | ||
| 642 | * @see #getSourceDataLine(AudioFormat) | ||
| 643 | * @since 1.5 | ||
| 644 | */ | ||
| 645 | public static SourceDataLine getSourceDataLine(AudioFormat format, | ||
| 646 | Mixer.Info mixerinfo) | ||
| 647 | throws LineUnavailableException{ | ||
| 648 | DataLine.Info info = new DataLine.Info(SourceDataLine.class, format); | ||
| 649 | Mixer mixer = AudioSystem.getMixer(mixerinfo); | ||
| 650 | return (SourceDataLine) mixer.getLine(info); | ||
| 651 | } | ||
| 652 | |||
| 653 | |||
| 654 | /** | ||
| 655 | * Obtains a target data line that can be used for recording | ||
| 656 | * audio data in the format specified by the | ||
| 657 | * <code>AudioFormat</code> object. The returned line | ||
| 658 | * will be provided by the default system mixer, or, | ||
| 659 | * if not possible, by any other mixer installed in the | ||
| 660 | * system that supports a matching | ||
| 661 | * <code>TargetDataLine</code> object. | ||
| 662 | * | ||
| 663 | * <p>The returned line should be opened with the | ||
| 664 | * <code>open(AudioFormat)</code> or | ||
| 665 | * <code>open(AudioFormat, int)</code> method. | ||
| 666 | * | ||
| 667 | * <p>This is a high-level method that uses <code>getMixer</code> | ||
| 668 | * and <code>getLine</code> internally. | ||
| 669 | * | ||
| 670 | * <p>The returned <code>TargetDataLine</code>'s default | ||
| 671 | * audio format will be initialized with <code>format</code>. | ||
| 672 | * | ||
| 673 | * <p>If the system property | ||
| 674 | * {@code javax.sound.sampled.TargetDataLine} | ||
| 675 | * is defined or it is defined in the file "sound.properties", | ||
| 676 | * it is used to retrieve the default target data line. | ||
| 677 | * For details, refer to the {@link AudioSystem class description}. | ||
| 678 | * | ||
| 679 | * @param format an <code>AudioFormat</code> object specifying | ||
| 680 | * the supported audio format of the returned line, | ||
| 681 | * or <code>null</code> for any audio format | ||
| 682 | * @return the desired <code>TargetDataLine</code> object | ||
| 683 | * | ||
| 684 | * @throws LineUnavailableException if a matching target data line | ||
| 685 | * is not available due to resource restrictions | ||
| 686 | * @throws SecurityException if a matching target data line | ||
| 687 | * is not available due to security restrictions | ||
| 688 | * @throws IllegalArgumentException if the system does not | ||
| 689 | * support at least one target data line supporting the | ||
| 690 | * specified audio format through any installed mixer | ||
| 691 | * | ||
| 692 | * @see #getTargetDataLine(AudioFormat, Mixer.Info) | ||
| 693 | * @see AudioPermission | ||
| 694 | * @since 1.5 | ||
| 695 | */ | ||
| 696 | public static TargetDataLine getTargetDataLine(AudioFormat format) | ||
| 697 | throws LineUnavailableException{ | ||
| 698 | |||
| 699 | DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); | ||
| 700 | return (TargetDataLine) AudioSystem.getLine(info); | ||
| 701 | } | ||
| 702 | |||
| 703 | |||
| 704 | |||
| 705 | /** | ||
| 706 | * Obtains a target data line that can be used for recording | ||
| 707 | * audio data in the format specified by the | ||
| 708 | * <code>AudioFormat</code> object, provided by the mixer | ||
| 709 | * specified by the <code>Mixer.Info</code> object. | ||
| 710 | * | ||
| 711 | * <p>The returned line should be opened with the | ||
| 712 | * <code>open(AudioFormat)</code> or | ||
| 713 | * <code>open(AudioFormat, int)</code> method. | ||
| 714 | * | ||
| 715 | * <p>This is a high-level method that uses <code>getMixer</code> | ||
| 716 | * and <code>getLine</code> internally. | ||
| 717 | * | ||
| 718 | * <p>The returned <code>TargetDataLine</code>'s default | ||
| 719 | * audio format will be initialized with <code>format</code>. | ||
| 720 | * | ||
| 721 | * @param format an <code>AudioFormat</code> object specifying | ||
| 722 | * the supported audio format of the returned line, | ||
| 723 | * or <code>null</code> for any audio format | ||
| 724 | * @param mixerinfo a <code>Mixer.Info</code> object representing the | ||
| 725 | * desired mixer, or <code>null</code> for the system default mixer | ||
| 726 | * @return the desired <code>TargetDataLine</code> object | ||
| 727 | * | ||
| 728 | * @throws LineUnavailableException if a matching target data | ||
| 729 | * line is not available from the specified mixer due | ||
| 730 | * to resource restrictions | ||
| 731 | * @throws SecurityException if a matching target data line | ||
| 732 | * is not available from the specified mixer due to | ||
| 733 | * security restrictions | ||
| 734 | * @throws IllegalArgumentException if the specified mixer does | ||
| 735 | * not support at least one target data line supporting | ||
| 736 | * the specified audio format | ||
| 737 | * | ||
| 738 | * @see #getTargetDataLine(AudioFormat) | ||
| 739 | * @see AudioPermission | ||
| 740 | * @since 1.5 | ||
| 741 | */ | ||
| 742 | public static TargetDataLine getTargetDataLine(AudioFormat format, | ||
| 743 | Mixer.Info mixerinfo) | ||
| 744 | throws LineUnavailableException { | ||
| 745 | |||
| 746 | DataLine.Info info = new DataLine.Info(TargetDataLine.class, format); | ||
| 747 | Mixer mixer = AudioSystem.getMixer(mixerinfo); | ||
| 748 | return (TargetDataLine) mixer.getLine(info); | ||
| 749 | } | ||
| 750 | |||
| 751 | |||
| 752 | // $$fb 2002-04-12: fix for 4662082: behavior of AudioSystem.getTargetEncodings() methods doesn't match the spec | ||
| 753 | /** | ||
| 754 | * Obtains the encodings that the system can obtain from an | ||
| 755 | * audio input stream with the specified encoding using the set | ||
| 756 | * of installed format converters. | ||
| 757 | * @param sourceEncoding the encoding for which conversion support | ||
| 758 | * is queried | ||
| 759 | * @return array of encodings. If <code>sourceEncoding</code>is not supported, | ||
| 760 | * an array of length 0 is returned. Otherwise, the array will have a length | ||
| 761 | * of at least 1, representing <code>sourceEncoding</code> (no conversion). | ||
| 762 | */ | ||
| 763 | public static AudioFormat.Encoding[] getTargetEncodings(AudioFormat.Encoding sourceEncoding) { | ||
| 764 | |||
| 765 | List codecs = getFormatConversionProviders(); | ||
| 766 | Vector encodings = new Vector(); | ||
| 767 | |||
| 768 | AudioFormat.Encoding encs[] = null; | ||
| 769 | |||
| 770 | // gather from all the codecs | ||
| 771 | for(int i=0; i<codecs.size(); i++ ) { | ||
| 772 | FormatConversionProvider codec = (FormatConversionProvider) codecs.get(i); | ||
| 773 | if( codec.isSourceEncodingSupported( sourceEncoding ) ) { | ||
| 774 | encs = codec.getTargetEncodings(); | ||
| 775 | for (int j = 0; j < encs.length; j++) { | ||
| 776 | encodings.addElement( encs[j] ); | ||
| 777 | } | ||
| 778 | } | ||
| 779 | } | ||
| 780 | AudioFormat.Encoding encs2[] = (AudioFormat.Encoding[]) encodings.toArray(new AudioFormat.Encoding[0]); | ||
| 781 | return encs2; | ||
| 782 | } | ||
| 783 | |||
| 784 | |||
| 785 | |||
| 786 | // $$fb 2002-04-12: fix for 4662082: behavior of AudioSystem.getTargetEncodings() methods doesn't match the spec | ||
| 787 | /** | ||
| 788 | * Obtains the encodings that the system can obtain from an | ||
| 789 | * audio input stream with the specified format using the set | ||
| 790 | * of installed format converters. | ||
| 791 | * @param sourceFormat the audio format for which conversion | ||
| 792 | * is queried | ||
| 793 | * @return array of encodings. If <code>sourceFormat</code>is not supported, | ||
| 794 | * an array of length 0 is returned. Otherwise, the array will have a length | ||
| 795 | * of at least 1, representing the encoding of <code>sourceFormat</code> (no conversion). | ||
| 796 | */ | ||
| 797 | public static AudioFormat.Encoding[] getTargetEncodings(AudioFormat sourceFormat) { | ||
| 798 | |||
| 799 | |||
| 800 | List codecs = getFormatConversionProviders(); | ||
| 801 | Vector encodings = new Vector(); | ||
| 802 | |||
| 803 | int size = 0; | ||
| 804 | int index = 0; | ||
| 805 | AudioFormat.Encoding encs[] = null; | ||
| 806 | |||
| 807 | // gather from all the codecs | ||
| 808 | |||
| 809 | for(int i=0; i<codecs.size(); i++ ) { | ||
| 810 | encs = ((FormatConversionProvider) codecs.get(i)).getTargetEncodings(sourceFormat); | ||
| 811 | size += encs.length; | ||
| 812 | encodings.addElement( encs ); | ||
| 813 | } | ||
| 814 | |||
| 815 | // now build a new array | ||
| 816 | |||
| 817 | AudioFormat.Encoding encs2[] = new AudioFormat.Encoding[size]; | ||
| 818 | for(int i=0; i<encodings.size(); i++ ) { | ||
| 819 | encs = (AudioFormat.Encoding [])(encodings.get(i)); | ||
| 820 | for(int j=0; j<encs.length; j++ ) { | ||
| 821 | encs2[index++] = encs[j]; | ||
| 822 | } | ||
| 823 | } | ||
| 824 | return encs2; | ||
| 825 | } | ||
| 826 | |||
| 827 | |||
| 828 | /** | ||
| 829 | * Indicates whether an audio input stream of the specified encoding | ||
| 830 | * can be obtained from an audio input stream that has the specified | ||
| 831 | * format. | ||
| 832 | * @param targetEncoding the desired encoding after conversion | ||
| 833 | * @param sourceFormat the audio format before conversion | ||
| 834 | * @return <code>true</code> if the conversion is supported, | ||
| 835 | * otherwise <code>false</code> | ||
| 836 | */ | ||
| 837 | public static boolean isConversionSupported(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat) { | ||
| 838 | |||
| 839 | |||
| 840 | List codecs = getFormatConversionProviders(); | ||
| 841 | |||
| 842 | for(int i=0; i<codecs.size(); i++ ) { | ||
| 843 | FormatConversionProvider codec = (FormatConversionProvider) codecs.get(i); | ||
| 844 | if(codec.isConversionSupported(targetEncoding,sourceFormat) ) { | ||
| 845 | return true; | ||
| 846 | } | ||
| 847 | } | ||
| 848 | return false; | ||
| 849 | } | ||
| 850 | |||
| 851 | |||
| 852 | /** | ||
| 853 | * Obtains an audio input stream of the indicated encoding, by converting the | ||
| 854 | * provided audio input stream. | ||
| 855 | * @param targetEncoding the desired encoding after conversion | ||
| 856 | * @param sourceStream the stream to be converted | ||
| 857 | * @return an audio input stream of the indicated encoding | ||
| 858 | * @throws IllegalArgumentException if the conversion is not supported | ||
| 859 | * @see #getTargetEncodings(AudioFormat.Encoding) | ||
| 860 | * @see #getTargetEncodings(AudioFormat) | ||
| 861 | * @see #isConversionSupported(AudioFormat.Encoding, AudioFormat) | ||
| 862 | * @see #getAudioInputStream(AudioFormat, AudioInputStream) | ||
| 863 | */ | ||
| 864 | public static AudioInputStream getAudioInputStream(AudioFormat.Encoding targetEncoding, | ||
| 865 | AudioInputStream sourceStream) { | ||
| 866 | |||
| 867 | List codecs = getFormatConversionProviders(); | ||
| 868 | |||
| 869 | for(int i = 0; i < codecs.size(); i++) { | ||
| 870 | FormatConversionProvider codec = (FormatConversionProvider) codecs.get(i); | ||
| 871 | if( codec.isConversionSupported( targetEncoding, sourceStream.getFormat() ) ) { | ||
| 872 | return codec.getAudioInputStream( targetEncoding, sourceStream ); | ||
| 873 | } | ||
| 874 | } | ||
| 875 | // we ran out of options, throw an exception | ||
| 876 | throw new IllegalArgumentException("Unsupported conversion: " + targetEncoding + " from " + sourceStream.getFormat()); | ||
| 877 | } | ||
| 878 | |||
| 879 | |||
| 880 | /** | ||
| 881 | * Obtains the formats that have a particular encoding and that the system can | ||
| 882 | * obtain from a stream of the specified format using the set of | ||
| 883 | * installed format converters. | ||
| 884 | * @param targetEncoding the desired encoding after conversion | ||
| 885 | * @param sourceFormat the audio format before conversion | ||
| 886 | * @return array of formats. If no formats of the specified | ||
| 887 | * encoding are supported, an array of length 0 is returned. | ||
| 888 | */ | ||
| 889 | public static AudioFormat[] getTargetFormats(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat) { | ||
| 890 | |||
| 891 | List codecs = getFormatConversionProviders(); | ||
| 892 | Vector formats = new Vector(); | ||
| 893 | |||
| 894 | int size = 0; | ||
| 895 | int index = 0; | ||
| 896 | AudioFormat fmts[] = null; | ||
| 897 | |||
| 898 | // gather from all the codecs | ||
| 899 | |||
| 900 | for(int i=0; i<codecs.size(); i++ ) { | ||
| 901 | FormatConversionProvider codec = (FormatConversionProvider) codecs.get(i); | ||
| 902 | fmts = codec.getTargetFormats(targetEncoding, sourceFormat); | ||
| 903 | size += fmts.length; | ||
| 904 | formats.addElement( fmts ); | ||
| 905 | } | ||
| 906 | |||
| 907 | // now build a new array | ||
| 908 | |||
| 909 | AudioFormat fmts2[] = new AudioFormat[size]; | ||
| 910 | for(int i=0; i<formats.size(); i++ ) { | ||
| 911 | fmts = (AudioFormat [])(formats.get(i)); | ||
| 912 | for(int j=0; j<fmts.length; j++ ) { | ||
| 913 | fmts2[index++] = fmts[j]; | ||
| 914 | } | ||
| 915 | } | ||
| 916 | return fmts2; | ||
| 917 | } | ||
| 918 | |||
| 919 | |||
| 920 | /** | ||
| 921 | * Indicates whether an audio input stream of a specified format | ||
| 922 | * can be obtained from an audio input stream of another specified format. | ||
| 923 | * @param targetFormat the desired audio format after conversion | ||
| 924 | * @param sourceFormat the audio format before conversion | ||
| 925 | * @return <code>true</code> if the conversion is supported, | ||
| 926 | * otherwise <code>false</code> | ||
| 927 | */ | ||
| 928 | |||
| 929 | public static boolean isConversionSupported(AudioFormat targetFormat, AudioFormat sourceFormat) { | ||
| 930 | |||
| 931 | List codecs = getFormatConversionProviders(); | ||
| 932 | |||
| 933 | for(int i=0; i<codecs.size(); i++ ) { | ||
| 934 | FormatConversionProvider codec = (FormatConversionProvider) codecs.get(i); | ||
| 935 | if(codec.isConversionSupported(targetFormat, sourceFormat) ) { | ||
| 936 | return true; | ||
| 937 | } | ||
| 938 | } | ||
| 939 | return false; | ||
| 940 | } | ||
| 941 | |||
| 942 | |||
| 943 | /** | ||
| 944 | * Obtains an audio input stream of the indicated format, by converting the | ||
| 945 | * provided audio input stream. | ||
| 946 | * @param targetFormat the desired audio format after conversion | ||
| 947 | * @param sourceStream the stream to be converted | ||
| 948 | * @return an audio input stream of the indicated format | ||
| 949 | * @throws IllegalArgumentException if the conversion is not supported | ||
| 950 | * #see #getTargetEncodings(AudioFormat) | ||
| 951 | * @see #getTargetFormats(AudioFormat.Encoding, AudioFormat) | ||
| 952 | * @see #isConversionSupported(AudioFormat, AudioFormat) | ||
| 953 | * @see #getAudioInputStream(AudioFormat.Encoding, AudioInputStream) | ||
| 954 | */ | ||
| 955 | public static AudioInputStream getAudioInputStream(AudioFormat targetFormat, | ||
| 956 | AudioInputStream sourceStream) { | ||
| 957 | |||
| 958 | if (sourceStream.getFormat().matches(targetFormat)) { | ||
| 959 | return sourceStream; | ||
| 960 | } | ||
| 961 | |||
| 962 | List codecs = getFormatConversionProviders(); | ||
| 963 | |||
| 964 | for(int i = 0; i < codecs.size(); i++) { | ||
| 965 | FormatConversionProvider codec = (FormatConversionProvider) codecs.get(i); | ||
| 966 | if(codec.isConversionSupported(targetFormat,sourceStream.getFormat()) ) { | ||
| 967 | return codec.getAudioInputStream(targetFormat,sourceStream); | ||
| 968 | } | ||
| 969 | } | ||
| 970 | |||
| 971 | // we ran out of options... | ||
| 972 | throw new IllegalArgumentException("Unsupported conversion: " + targetFormat + " from " + sourceStream.getFormat()); | ||
| 973 | } | ||
| 974 | |||
| 975 | |||
| 976 | /** | ||
| 977 | * Obtains the audio file format of the provided input stream. The stream must | ||
| 978 | * point to valid audio file data. The implementation of this method may require | ||
| 979 | * multiple parsers to examine the stream to determine whether they support it. | ||
| 980 | * These parsers must be able to mark the stream, read enough data to determine whether they | ||
| 981 | * support the stream, and, if not, reset the stream's read pointer to its original | ||
| 982 | * position. If the input stream does not support these operations, this method may fail | ||
| 983 | * with an <code>IOException</code>. | ||
| 984 | * @param stream the input stream from which file format information should be | ||
| 985 | * extracted | ||
| 986 | * @return an <code>AudioFileFormat</code> object describing the stream's audio file format | ||
| 987 | * @throws UnsupportedAudioFileException if the stream does not point to valid audio | ||
| 988 | * file data recognized by the system | ||
| 989 | * @throws IOException if an input/output exception occurs | ||
| 990 | * @see InputStream#markSupported | ||
| 991 | * @see InputStream#mark | ||
| 992 | */ | ||
| 993 | public static AudioFileFormat getAudioFileFormat(InputStream stream) | ||
| 994 | throws UnsupportedAudioFileException, IOException { | ||
| 995 | |||
| 996 | List providers = getAudioFileReaders(); | ||
| 997 | AudioFileFormat format = null; | ||
| 998 | |||
| 999 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 1000 | AudioFileReader reader = (AudioFileReader) providers.get(i); | ||
| 1001 | try { | ||
| 1002 | format = reader.getAudioFileFormat( stream ); // throws IOException | ||
| 1003 | break; | ||
| 1004 | } catch (UnsupportedAudioFileException e) { | ||
| 1005 | continue; | ||
| 1006 | } | ||
| 1007 | } | ||
| 1008 | |||
| 1009 | if( format==null ) { | ||
| 1010 | throw new UnsupportedAudioFileException("file is not a supported file type"); | ||
| 1011 | } else { | ||
| 1012 | return format; | ||
| 1013 | } | ||
| 1014 | } | ||
| 1015 | |||
| 1016 | /** | ||
| 1017 | * Obtains the audio file format of the specified URL. The URL must | ||
| 1018 | * point to valid audio file data. | ||
| 1019 | * @param url the URL from which file format information should be | ||
| 1020 | * extracted | ||
| 1021 | * @return an <code>AudioFileFormat</code> object describing the audio file format | ||
| 1022 | * @throws UnsupportedAudioFileException if the URL does not point to valid audio | ||
| 1023 | * file data recognized by the system | ||
| 1024 | * @throws IOException if an input/output exception occurs | ||
| 1025 | */ | ||
| 1026 | public static AudioFileFormat getAudioFileFormat(URL url) | ||
| 1027 | throws UnsupportedAudioFileException, IOException { | ||
| 1028 | |||
| 1029 | List providers = getAudioFileReaders(); | ||
| 1030 | AudioFileFormat format = null; | ||
| 1031 | |||
| 1032 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 1033 | AudioFileReader reader = (AudioFileReader) providers.get(i); | ||
| 1034 | try { | ||
| 1035 | format = reader.getAudioFileFormat( url ); // throws IOException | ||
| 1036 | break; | ||
| 1037 | } catch (UnsupportedAudioFileException e) { | ||
| 1038 | continue; | ||
| 1039 | } | ||
| 1040 | } | ||
| 1041 | |||
| 1042 | if( format==null ) { | ||
| 1043 | throw new UnsupportedAudioFileException("file is not a supported file type"); | ||
| 1044 | } else { | ||
| 1045 | return format; | ||
| 1046 | } | ||
| 1047 | } | ||
| 1048 | |||
| 1049 | /** | ||
| 1050 | * Obtains the audio file format of the specified <code>File</code>. The <code>File</code> must | ||
| 1051 | * point to valid audio file data. | ||
| 1052 | * @param file the <code>File</code> from which file format information should be | ||
| 1053 | * extracted | ||
| 1054 | * @return an <code>AudioFileFormat</code> object describing the audio file format | ||
| 1055 | * @throws UnsupportedAudioFileException if the <code>File</code> does not point to valid audio | ||
| 1056 | * file data recognized by the system | ||
| 1057 | * @throws IOException if an I/O exception occurs | ||
| 1058 | */ | ||
| 1059 | public static AudioFileFormat getAudioFileFormat(File file) | ||
| 1060 | throws UnsupportedAudioFileException, IOException { | ||
| 1061 | |||
| 1062 | List providers = getAudioFileReaders(); | ||
| 1063 | AudioFileFormat format = null; | ||
| 1064 | |||
| 1065 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 1066 | AudioFileReader reader = (AudioFileReader) providers.get(i); | ||
| 1067 | try { | ||
| 1068 | format = reader.getAudioFileFormat( file ); // throws IOException | ||
| 1069 | break; | ||
| 1070 | } catch (UnsupportedAudioFileException e) { | ||
| 1071 | continue; | ||
| 1072 | } | ||
| 1073 | } | ||
| 1074 | |||
| 1075 | if( format==null ) { | ||
| 1076 | throw new UnsupportedAudioFileException("file is not a supported file type"); | ||
| 1077 | } else { | ||
| 1078 | return format; | ||
| 1079 | } | ||
| 1080 | } | ||
| 1081 | |||
| 1082 | |||
| 1083 | /** | ||
| 1084 | * Obtains an audio input stream from the provided input stream. The stream must | ||
| 1085 | * point to valid audio file data. The implementation of this method may | ||
| 1086 | * require multiple parsers to | ||
| 1087 | * examine the stream to determine whether they support it. These parsers must | ||
| 1088 | * be able to mark the stream, read enough data to determine whether they | ||
| 1089 | * support the stream, and, if not, reset the stream's read pointer to its original | ||
| 1090 | * position. If the input stream does not support these operation, this method may fail | ||
| 1091 | * with an <code>IOException</code>. | ||
| 1092 | * @param stream the input stream from which the <code>AudioInputStream</code> should be | ||
| 1093 | * constructed | ||
| 1094 | * @return an <code>AudioInputStream</code> object based on the audio file data contained | ||
| 1095 | * in the input stream. | ||
| 1096 | * @throws UnsupportedAudioFileException if the stream does not point to valid audio | ||
| 1097 | * file data recognized by the system | ||
| 1098 | * @throws IOException if an I/O exception occurs | ||
| 1099 | * @see InputStream#markSupported | ||
| 1100 | * @see InputStream#mark | ||
| 1101 | */ | ||
| 1102 | public static AudioInputStream getAudioInputStream(InputStream stream) | ||
| 1103 | throws UnsupportedAudioFileException, IOException { | ||
| 1104 | |||
| 1105 | List providers = getAudioFileReaders(); | ||
| 1106 | AudioInputStream audioStream = null; | ||
| 1107 | |||
| 1108 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 1109 | AudioFileReader reader = (AudioFileReader) providers.get(i); | ||
| 1110 | try { | ||
| 1111 | audioStream = reader.getAudioInputStream( stream ); // throws IOException | ||
| 1112 | break; | ||
| 1113 | } catch (UnsupportedAudioFileException e) { | ||
| 1114 | continue; | ||
| 1115 | } | ||
| 1116 | } | ||
| 1117 | |||
| 1118 | if( audioStream==null ) { | ||
| 1119 | throw new UnsupportedAudioFileException("could not get audio input stream from input stream"); | ||
| 1120 | } else { | ||
| 1121 | return audioStream; | ||
| 1122 | } | ||
| 1123 | } | ||
| 1124 | |||
| 1125 | /** | ||
| 1126 | * Obtains an audio input stream from the URL provided. The URL must | ||
| 1127 | * point to valid audio file data. | ||
| 1128 | * @param url the URL for which the <code>AudioInputStream</code> should be | ||
| 1129 | * constructed | ||
| 1130 | * @return an <code>AudioInputStream</code> object based on the audio file data pointed | ||
| 1131 | * to by the URL | ||
| 1132 | * @throws UnsupportedAudioFileException if the URL does not point to valid audio | ||
| 1133 | * file data recognized by the system | ||
| 1134 | * @throws IOException if an I/O exception occurs | ||
| 1135 | */ | ||
| 1136 | public static AudioInputStream getAudioInputStream(URL url) | ||
| 1137 | throws UnsupportedAudioFileException, IOException { | ||
| 1138 | |||
| 1139 | List providers = getAudioFileReaders(); | ||
| 1140 | AudioInputStream audioStream = null; | ||
| 1141 | |||
| 1142 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 1143 | AudioFileReader reader = (AudioFileReader) providers.get(i); | ||
| 1144 | try { | ||
| 1145 | audioStream = reader.getAudioInputStream( url ); // throws IOException | ||
| 1146 | break; | ||
| 1147 | } catch (UnsupportedAudioFileException e) { | ||
| 1148 | continue; | ||
| 1149 | } | ||
| 1150 | } | ||
| 1151 | |||
| 1152 | if( audioStream==null ) { | ||
| 1153 | throw new UnsupportedAudioFileException("could not get audio input stream from input URL"); | ||
| 1154 | } else { | ||
| 1155 | return audioStream; | ||
| 1156 | } | ||
| 1157 | } | ||
| 1158 | |||
| 1159 | /** | ||
| 1160 | * Obtains an audio input stream from the provided <code>File</code>. The <code>File</code> must | ||
| 1161 | * point to valid audio file data. | ||
| 1162 | * @param file the <code>File</code> for which the <code>AudioInputStream</code> should be | ||
| 1163 | * constructed | ||
| 1164 | * @return an <code>AudioInputStream</code> object based on the audio file data pointed | ||
| 1165 | * to by the <code>File</code> | ||
| 1166 | * @throws UnsupportedAudioFileException if the <code>File</code> does not point to valid audio | ||
| 1167 | * file data recognized by the system | ||
| 1168 | * @throws IOException if an I/O exception occurs | ||
| 1169 | */ | ||
| 1170 | public static AudioInputStream getAudioInputStream(File file) | ||
| 1171 | throws UnsupportedAudioFileException, IOException { | ||
| 1172 | |||
| 1173 | List providers = getAudioFileReaders(); | ||
| 1174 | AudioInputStream audioStream = null; | ||
| 1175 | |||
| 1176 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 1177 | AudioFileReader reader = (AudioFileReader) providers.get(i); | ||
| 1178 | try { | ||
| 1179 | audioStream = reader.getAudioInputStream( file ); // throws IOException | ||
| 1180 | break; | ||
| 1181 | } catch (UnsupportedAudioFileException e) { | ||
| 1182 | continue; | ||
| 1183 | } | ||
| 1184 | } | ||
| 1185 | |||
| 1186 | if( audioStream==null ) { | ||
| 1187 | throw new UnsupportedAudioFileException("could not get audio input stream from input file"); | ||
| 1188 | } else { | ||
| 1189 | return audioStream; | ||
| 1190 | } | ||
| 1191 | } | ||
| 1192 | |||
| 1193 | |||
| 1194 | /** | ||
| 1195 | * Obtains the file types for which file writing support is provided by the system. | ||
| 1196 | * @return array of unique file types. If no file types are supported, | ||
| 1197 | * an array of length 0 is returned. | ||
| 1198 | */ | ||
| 1199 | public static AudioFileFormat.Type[] getAudioFileTypes() { | ||
| 1200 | List providers = getAudioFileWriters(); | ||
| 1201 | Set returnTypesSet = new HashSet(); | ||
| 1202 | |||
| 1203 | for(int i=0; i < providers.size(); i++) { | ||
| 1204 | AudioFileWriter writer = (AudioFileWriter) providers.get(i); | ||
| 1205 | AudioFileFormat.Type[] fileTypes = writer.getAudioFileTypes(); | ||
| 1206 | for(int j=0; j < fileTypes.length; j++) { | ||
| 1207 | returnTypesSet.add(fileTypes[j]); | ||
| 1208 | } | ||
| 1209 | } | ||
| 1210 | AudioFileFormat.Type returnTypes[] = (AudioFileFormat.Type[]) | ||
| 1211 | returnTypesSet.toArray(new AudioFileFormat.Type[0]); | ||
| 1212 | return returnTypes; | ||
| 1213 | } | ||
| 1214 | |||
| 1215 | |||
| 1216 | /** | ||
| 1217 | * Indicates whether file writing support for the specified file type is provided | ||
| 1218 | * by the system. | ||
| 1219 | * @param fileType the file type for which write capabilities are queried | ||
| 1220 | * @return <code>true</code> if the file type is supported, | ||
| 1221 | * otherwise <code>false</code> | ||
| 1222 | */ | ||
| 1223 | public static boolean isFileTypeSupported(AudioFileFormat.Type fileType) { | ||
| 1224 | |||
| 1225 | List providers = getAudioFileWriters(); | ||
| 1226 | |||
| 1227 | for(int i=0; i < providers.size(); i++) { | ||
| 1228 | AudioFileWriter writer = (AudioFileWriter) providers.get(i); | ||
| 1229 | if (writer.isFileTypeSupported(fileType)) { | ||
| 1230 | return true; | ||
| 1231 | } | ||
| 1232 | } | ||
| 1233 | return false; | ||
| 1234 | } | ||
| 1235 | |||
| 1236 | |||
| 1237 | /** | ||
| 1238 | * Obtains the file types that the system can write from the | ||
| 1239 | * audio input stream specified. | ||
| 1240 | * @param stream the audio input stream for which audio file type support | ||
| 1241 | * is queried | ||
| 1242 | * @return array of file types. If no file types are supported, | ||
| 1243 | * an array of length 0 is returned. | ||
| 1244 | */ | ||
| 1245 | public static AudioFileFormat.Type[] getAudioFileTypes(AudioInputStream stream) { | ||
| 1246 | List providers = getAudioFileWriters(); | ||
| 1247 | Set returnTypesSet = new HashSet(); | ||
| 1248 | |||
| 1249 | for(int i=0; i < providers.size(); i++) { | ||
| 1250 | AudioFileWriter writer = (AudioFileWriter) providers.get(i); | ||
| 1251 | AudioFileFormat.Type[] fileTypes = writer.getAudioFileTypes(stream); | ||
| 1252 | for(int j=0; j < fileTypes.length; j++) { | ||
| 1253 | returnTypesSet.add(fileTypes[j]); | ||
| 1254 | } | ||
| 1255 | } | ||
| 1256 | AudioFileFormat.Type returnTypes[] = (AudioFileFormat.Type[]) | ||
| 1257 | returnTypesSet.toArray(new AudioFileFormat.Type[0]); | ||
| 1258 | return returnTypes; | ||
| 1259 | } | ||
| 1260 | |||
| 1261 | |||
| 1262 | /** | ||
| 1263 | * Indicates whether an audio file of the specified file type can be written | ||
| 1264 | * from the indicated audio input stream. | ||
| 1265 | * @param fileType the file type for which write capabilities are queried | ||
| 1266 | * @param stream the stream for which file-writing support is queried | ||
| 1267 | * @return <code>true</code> if the file type is supported for this audio input stream, | ||
| 1268 | * otherwise <code>false</code> | ||
| 1269 | */ | ||
| 1270 | public static boolean isFileTypeSupported(AudioFileFormat.Type fileType, | ||
| 1271 | AudioInputStream stream) { | ||
| 1272 | |||
| 1273 | List providers = getAudioFileWriters(); | ||
| 1274 | |||
| 1275 | for(int i=0; i < providers.size(); i++) { | ||
| 1276 | AudioFileWriter writer = (AudioFileWriter) providers.get(i); | ||
| 1277 | if(writer.isFileTypeSupported(fileType, stream)) { | ||
| 1278 | return true; | ||
| 1279 | } | ||
| 1280 | } | ||
| 1281 | return false; | ||
| 1282 | } | ||
| 1283 | |||
| 1284 | |||
| 1285 | /** | ||
| 1286 | * Writes a stream of bytes representing an audio file of the specified file type | ||
| 1287 | * to the output stream provided. Some file types require that | ||
| 1288 | * the length be written into the file header; such files cannot be written from | ||
| 1289 | * start to finish unless the length is known in advance. An attempt | ||
| 1290 | * to write a file of such a type will fail with an IOException if the length in | ||
| 1291 | * the audio file type is <code>AudioSystem.NOT_SPECIFIED</code>. | ||
| 1292 | * | ||
| 1293 | * @param stream the audio input stream containing audio data to be | ||
| 1294 | * written to the file | ||
| 1295 | * @param fileType the kind of audio file to write | ||
| 1296 | * @param out the stream to which the file data should be written | ||
| 1297 | * @return the number of bytes written to the output stream | ||
| 1298 | * @throws IOException if an input/output exception occurs | ||
| 1299 | * @throws IllegalArgumentException if the file type is not supported by | ||
| 1300 | * the system | ||
| 1301 | * @see #isFileTypeSupported | ||
| 1302 | * @see #getAudioFileTypes | ||
| 1303 | */ | ||
| 1304 | public static int write(AudioInputStream stream, AudioFileFormat.Type fileType, | ||
| 1305 | OutputStream out) throws IOException { | ||
| 1306 | |||
| 1307 | List providers = getAudioFileWriters(); | ||
| 1308 | int bytesWritten = 0; | ||
| 1309 | boolean flag = false; | ||
| 1310 | |||
| 1311 | for(int i=0; i < providers.size(); i++) { | ||
| 1312 | AudioFileWriter writer = (AudioFileWriter) providers.get(i); | ||
| 1313 | try { | ||
| 1314 | bytesWritten = writer.write( stream, fileType, out ); // throws IOException | ||
| 1315 | flag = true; | ||
| 1316 | break; | ||
| 1317 | } catch (IllegalArgumentException e) { | ||
| 1318 | // thrown if this provider cannot write the sequence, try the next | ||
| 1319 | continue; | ||
| 1320 | } | ||
| 1321 | } | ||
| 1322 | if(!flag) { | ||
| 1323 | throw new IllegalArgumentException("could not write audio file: file type not supported: " + fileType); | ||
| 1324 | } else { | ||
| 1325 | return bytesWritten; | ||
| 1326 | } | ||
| 1327 | } | ||
| 1328 | |||
| 1329 | |||
| 1330 | /** | ||
| 1331 | * Writes a stream of bytes representing an audio file of the specified file type | ||
| 1332 | * to the external file provided. | ||
| 1333 | * @param stream the audio input stream containing audio data to be | ||
| 1334 | * written to the file | ||
| 1335 | * @param fileType the kind of audio file to write | ||
| 1336 | * @param out the external file to which the file data should be written | ||
| 1337 | * @return the number of bytes written to the file | ||
| 1338 | * @throws IOException if an I/O exception occurs | ||
| 1339 | * @throws IllegalArgumentException if the file type is not supported by | ||
| 1340 | * the system | ||
| 1341 | * @see #isFileTypeSupported | ||
| 1342 | * @see #getAudioFileTypes | ||
| 1343 | */ | ||
| 1344 | public static int write(AudioInputStream stream, AudioFileFormat.Type fileType, | ||
| 1345 | File out) throws IOException { | ||
| 1346 | |||
| 1347 | List providers = getAudioFileWriters(); | ||
| 1348 | int bytesWritten = 0; | ||
| 1349 | boolean flag = false; | ||
| 1350 | |||
| 1351 | for(int i=0; i < providers.size(); i++) { | ||
| 1352 | AudioFileWriter writer = (AudioFileWriter) providers.get(i); | ||
| 1353 | try { | ||
| 1354 | bytesWritten = writer.write( stream, fileType, out ); // throws IOException | ||
| 1355 | flag = true; | ||
| 1356 | break; | ||
| 1357 | } catch (IllegalArgumentException e) { | ||
| 1358 | // thrown if this provider cannot write the sequence, try the next | ||
| 1359 | continue; | ||
| 1360 | } | ||
| 1361 | } | ||
| 1362 | if (!flag) { | ||
| 1363 | throw new IllegalArgumentException("could not write audio file: file type not supported: " + fileType); | ||
| 1364 | } else { | ||
| 1365 | return bytesWritten; | ||
| 1366 | } | ||
| 1367 | } | ||
| 1368 | |||
| 1369 | |||
| 1370 | // METHODS FOR INTERNAL IMPLEMENTATION USE | ||
| 1371 | |||
| 1372 | /** | ||
| 1373 | * Obtains the set of MixerProviders on the system. | ||
| 1374 | */ | ||
| 1375 | private static List getMixerProviders() { | ||
| 1376 | return getProviders(MixerProvider.class); | ||
| 1377 | } | ||
| 1378 | |||
| 1379 | |||
| 1380 | /** | ||
| 1381 | * Obtains the set of format converters (codecs, transcoders, etc.) | ||
| 1382 | * that are currently installed on the system. | ||
| 1383 | * @return an array of | ||
| 1384 | * {@link javax.sound.sampled.spi.FormatConversionProvider | ||
| 1385 | * FormatConversionProvider} | ||
| 1386 | * objects representing the available format converters. If no format | ||
| 1387 | * converters readers are available on the system, an array of length 0 is | ||
| 1388 | * returned. | ||
| 1389 | */ | ||
| 1390 | private static List getFormatConversionProviders() { | ||
| 1391 | return getProviders(FormatConversionProvider.class); | ||
| 1392 | } | ||
| 1393 | |||
| 1394 | |||
| 1395 | /** | ||
| 1396 | * Obtains the set of audio file readers that are currently installed on the system. | ||
| 1397 | * @return a List of | ||
| 1398 | * {@link javax.sound.sampled.spi.AudioFileReader | ||
| 1399 | * AudioFileReader} | ||
| 1400 | * objects representing the installed audio file readers. If no audio file | ||
| 1401 | * readers are available on the system, an empty List is returned. | ||
| 1402 | */ | ||
| 1403 | private static List getAudioFileReaders() { | ||
| 1404 | return getProviders(AudioFileReader.class); | ||
| 1405 | } | ||
| 1406 | |||
| 1407 | |||
| 1408 | /** | ||
| 1409 | * Obtains the set of audio file writers that are currently installed on the system. | ||
| 1410 | * @return a List of | ||
| 1411 | * {@link javax.sound.samples.spi.AudioFileWriter AudioFileWriter} | ||
| 1412 | * objects representing the available audio file writers. If no audio file | ||
| 1413 | * writers are available on the system, an empty List is returned. | ||
| 1414 | */ | ||
| 1415 | private static List getAudioFileWriters() { | ||
| 1416 | return getProviders(AudioFileWriter.class); | ||
| 1417 | } | ||
| 1418 | |||
| 1419 | |||
| 1420 | |||
| 1421 | /** Attempts to locate and return a default Mixer that provides lines | ||
| 1422 | * of the specified type. | ||
| 1423 | * | ||
| 1424 | * @param providers the installed mixer providers | ||
| 1425 | * @param info The requested line type | ||
| 1426 | * TargetDataLine.class, Clip.class or Port.class. | ||
| 1427 | * @return a Mixer that matches the requirements, or null if no default mixer found | ||
| 1428 | */ | ||
| 1429 | private static Mixer getDefaultMixer(List providers, Line.Info info) { | ||
| 1430 | Class lineClass = info.getLineClass(); | ||
| 1431 | String providerClassName = JDK13Services.getDefaultProviderClassName(lineClass); | ||
| 1432 | String instanceName = JDK13Services.getDefaultInstanceName(lineClass); | ||
| 1433 | Mixer mixer; | ||
| 1434 | |||
| 1435 | if (providerClassName != null) { | ||
| 1436 | MixerProvider defaultProvider = getNamedProvider(providerClassName, providers); | ||
| 1437 | if (defaultProvider != null) { | ||
| 1438 | if (instanceName != null) { | ||
| 1439 | mixer = getNamedMixer(instanceName, defaultProvider, info); | ||
| 1440 | if (mixer != null) { | ||
| 1441 | return mixer; | ||
| 1442 | } | ||
| 1443 | } else { | ||
| 1444 | mixer = getFirstMixer(defaultProvider, info, | ||
| 1445 | false /* mixing not required*/); | ||
| 1446 | if (mixer != null) { | ||
| 1447 | return mixer; | ||
| 1448 | } | ||
| 1449 | } | ||
| 1450 | |||
| 1451 | } | ||
| 1452 | } | ||
| 1453 | |||
| 1454 | /* Provider class not specified or | ||
| 1455 | provider class cannot be found, or | ||
| 1456 | provider class and instance specified and instance cannot be found or is not appropriate */ | ||
| 1457 | if (instanceName != null) { | ||
| 1458 | mixer = getNamedMixer(instanceName, providers, info); | ||
| 1459 | if (mixer != null) { | ||
| 1460 | return mixer; | ||
| 1461 | } | ||
| 1462 | } | ||
| 1463 | |||
| 1464 | |||
| 1465 | /* No default are specified, or if something is specified, everything | ||
| 1466 | failed. */ | ||
| 1467 | return null; | ||
| 1468 | } | ||
| 1469 | |||
| 1470 | |||
| 1471 | |||
| 1472 | /** Return a MixerProvider of a given class from the list of | ||
| 1473 | MixerProviders. | ||
| 1474 | |||
| 1475 | This method never requires the returned Mixer to do mixing. | ||
| 1476 | @param providerClassName The class name of the provider to be returned. | ||
| 1477 | @param providers The list of MixerProviders that is searched. | ||
| 1478 | @return A MixerProvider of the requested class, or null if none is | ||
| 1479 | found. | ||
| 1480 | */ | ||
| 1481 | private static MixerProvider getNamedProvider(String providerClassName, | ||
| 1482 | List providers) { | ||
| 1483 | for(int i = 0; i < providers.size(); i++) { | ||
| 1484 | MixerProvider provider = (MixerProvider) providers.get(i); | ||
| 1485 | if (provider.getClass().getName().equals(providerClassName)) { | ||
| 1486 | return provider; | ||
| 1487 | } | ||
| 1488 | } | ||
| 1489 | return null; | ||
| 1490 | } | ||
| 1491 | |||
| 1492 | |||
| 1493 | /** Return a Mixer with a given name from a given MixerProvider. | ||
| 1494 | This method never requires the returned Mixer to do mixing. | ||
| 1495 | @param mixerName The name of the Mixer to be returned. | ||
| 1496 | @param provider The MixerProvider to check for Mixers. | ||
| 1497 | @param info The type of line the returned Mixer is required to | ||
| 1498 | support. | ||
| 1499 | |||
| 1500 | @return A Mixer matching the requirements, or null if none is found. | ||
| 1501 | */ | ||
| 1502 | private static Mixer getNamedMixer(String mixerName, | ||
| 1503 | MixerProvider provider, | ||
| 1504 | Line.Info info) { | ||
| 1505 | Mixer.Info[] infos = provider.getMixerInfo(); | ||
| 1506 | for (int i = 0; i < infos.length; i++) { | ||
| 1507 | if (infos[i].getName().equals(mixerName)) { | ||
| 1508 | Mixer mixer = provider.getMixer(infos[i]); | ||
| 1509 | if (isAppropriateMixer(mixer, info, false)) { | ||
| 1510 | return mixer; | ||
| 1511 | } | ||
| 1512 | } | ||
| 1513 | } | ||
| 1514 | return null; | ||
| 1515 | } | ||
| 1516 | |||
| 1517 | |||
| 1518 | /** From a List of MixerProviders, return a Mixer with a given name. | ||
| 1519 | This method never requires the returned Mixer to do mixing. | ||
| 1520 | @param mixerName The name of the Mixer to be returned. | ||
| 1521 | @param providers The List of MixerProviders to check for Mixers. | ||
| 1522 | @param info The type of line the returned Mixer is required to | ||
| 1523 | support. | ||
| 1524 | @return A Mixer matching the requirements, or null if none is found. | ||
| 1525 | */ | ||
| 1526 | private static Mixer getNamedMixer(String mixerName, | ||
| 1527 | List providers, | ||
| 1528 | Line.Info info) { | ||
| 1529 | for(int i = 0; i < providers.size(); i++) { | ||
| 1530 | MixerProvider provider = (MixerProvider) providers.get(i); | ||
| 1531 | Mixer mixer = getNamedMixer(mixerName, provider, info); | ||
| 1532 | if (mixer != null) { | ||
| 1533 | return mixer; | ||
| 1534 | } | ||
| 1535 | } | ||
| 1536 | return null; | ||
| 1537 | } | ||
| 1538 | |||
| 1539 | |||
| 1540 | /** From a given MixerProvider, return the first appropriate Mixer. | ||
| 1541 | @param provider The MixerProvider to check for Mixers. | ||
| 1542 | @param info The type of line the returned Mixer is required to | ||
| 1543 | support. | ||
| 1544 | @param isMixingRequired If true, only Mixers that support mixing are | ||
| 1545 | returned for line types of SourceDataLine and Clip. | ||
| 1546 | |||
| 1547 | @return A Mixer that is considered appropriate, or null | ||
| 1548 | if none is found. | ||
| 1549 | */ | ||
| 1550 | private static Mixer getFirstMixer(MixerProvider provider, | ||
| 1551 | Line.Info info, | ||
| 1552 | boolean isMixingRequired) { | ||
| 1553 | Mixer.Info[] infos = provider.getMixerInfo(); | ||
| 1554 | for (int j = 0; j < infos.length; j++) { | ||
| 1555 | Mixer mixer = provider.getMixer(infos[j]); | ||
| 1556 | if (isAppropriateMixer(mixer, info, isMixingRequired)) { | ||
| 1557 | return mixer; | ||
| 1558 | } | ||
| 1559 | } | ||
| 1560 | return null; | ||
| 1561 | } | ||
| 1562 | |||
| 1563 | |||
| 1564 | /** Checks if a Mixer is appropriate. | ||
| 1565 | A Mixer is considered appropriate if it support the given line type. | ||
| 1566 | If isMixingRequired is true and the line type is an output one | ||
| 1567 | (SourceDataLine, Clip), the mixer is appropriate if it supports | ||
| 1568 | at least 2 (concurrent) lines of the given type. | ||
| 1569 | |||
| 1570 | @return true if the mixer is considered appropriate according to the | ||
| 1571 | rules given above, false otherwise. | ||
| 1572 | */ | ||
| 1573 | private static boolean isAppropriateMixer(Mixer mixer, | ||
| 1574 | Line.Info lineInfo, | ||
| 1575 | boolean isMixingRequired) { | ||
| 1576 | if (! mixer.isLineSupported(lineInfo)) { | ||
| 1577 | return false; | ||
| 1578 | } | ||
| 1579 | Class lineClass = lineInfo.getLineClass(); | ||
| 1580 | if (isMixingRequired | ||
| 1581 | && (SourceDataLine.class.isAssignableFrom(lineClass) || | ||
| 1582 | Clip.class.isAssignableFrom(lineClass))) { | ||
| 1583 | int maxLines = mixer.getMaxLines(lineInfo); | ||
| 1584 | return ((maxLines == NOT_SPECIFIED) || (maxLines > 1)); | ||
| 1585 | } | ||
| 1586 | return true; | ||
| 1587 | } | ||
| 1588 | |||
| 1589 | |||
| 1590 | |||
| 1591 | /** | ||
| 1592 | * Like getMixerInfo, but return List | ||
| 1593 | */ | ||
| 1594 | private static List getMixerInfoList() { | ||
| 1595 | List providers = getMixerProviders(); | ||
| 1596 | return getMixerInfoList(providers); | ||
| 1597 | } | ||
| 1598 | |||
| 1599 | |||
| 1600 | /** | ||
| 1601 | * Like getMixerInfo, but return List | ||
| 1602 | */ | ||
| 1603 | private static List getMixerInfoList(List providers) { | ||
| 1604 | List infos = new ArrayList(); | ||
| 1605 | |||
| 1606 | Mixer.Info[] someInfos; // per-mixer | ||
| 1607 | Mixer.Info[] allInfos; // for all mixers | ||
| 1608 | |||
| 1609 | for(int i = 0; i < providers.size(); i++ ) { | ||
| 1610 | someInfos = (Mixer.Info[]) | ||
| 1611 | ((MixerProvider)providers.get(i)).getMixerInfo(); | ||
| 1612 | |||
| 1613 | for (int j = 0; j < someInfos.length; j++) { | ||
| 1614 | infos.add(someInfos[j]); | ||
| 1615 | } | ||
| 1616 | } | ||
| 1617 | |||
| 1618 | return infos; | ||
| 1619 | } | ||
| 1620 | |||
| 1621 | |||
| 1622 | /** | ||
| 1623 | * Obtains the set of services currently installed on the system | ||
| 1624 | * using sun.misc.Service, the SPI mechanism in 1.3. | ||
| 1625 | * @return a List of instances of providers for the requested service. | ||
| 1626 | * If no providers are available, a vector of length 0 will be returned. | ||
| 1627 | */ | ||
| 1628 | private static List getProviders(Class providerClass) { | ||
| 1629 | return JDK13Services.getProviders(providerClass); | ||
| 1630 | } | ||
| 1631 | } | ||