J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2007 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.media.sound; |
| 27 | |
| 28 | import java.util.Vector; |
| 29 | |
| 30 | import javax.sound.sampled.AudioFormat; |
| 31 | import javax.sound.sampled.AudioSystem; |
| 32 | import javax.sound.sampled.Control; |
| 33 | import javax.sound.sampled.DataLine; |
| 34 | import javax.sound.sampled.LineEvent; |
| 35 | import javax.sound.sampled.LineUnavailableException; |
| 36 | import javax.sound.sampled.Mixer; |
| 37 | |
| 38 | |
| 39 | /** |
| 40 | * AbstractDataLine |
| 41 | * |
| 42 | * @author Kara Kytle |
| 43 | */ |
| 44 | abstract class AbstractDataLine extends AbstractLine implements DataLine { |
| 45 | |
| 46 | // DEFAULTS |
| 47 | |
| 48 | // default format |
| 49 | protected /*final*/ AudioFormat defaultFormat; |
| 50 | |
| 51 | // default buffer size in bytes |
| 52 | protected /*final*/ int defaultBufferSize; |
| 53 | |
| 54 | // the lock for synchronization |
| 55 | protected Object lock = new Object(); |
| 56 | |
| 57 | // STATE |
| 58 | |
| 59 | // current format |
| 60 | protected AudioFormat format; |
| 61 | |
| 62 | // current buffer size in bytes |
| 63 | protected int bufferSize; |
| 64 | |
| 65 | protected boolean running = false; |
| 66 | private boolean started = false; |
| 67 | private boolean active = false; |
| 68 | |
| 69 | |
| 70 | /** |
| 71 | * Constructs a new AbstractLine. |
| 72 | */ |
| 73 | protected AbstractDataLine(DataLine.Info info, AbstractMixer mixer, Control[] controls) { |
| 74 | this(info, mixer, controls, null, AudioSystem.NOT_SPECIFIED); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * Constructs a new AbstractLine. |
| 79 | */ |
| 80 | protected AbstractDataLine(DataLine.Info info, AbstractMixer mixer, Control[] controls, AudioFormat format, int bufferSize) { |
| 81 | |
| 82 | super(info, mixer, controls); |
| 83 | |
| 84 | // record the default values |
| 85 | if (format != null) { |
| 86 | defaultFormat = format; |
| 87 | } else { |
| 88 | // default CD-quality |
| 89 | defaultFormat = new AudioFormat(44100.0f, 16, 2, true, Platform.isBigEndian()); |
| 90 | } |
| 91 | if (bufferSize > 0) { |
| 92 | defaultBufferSize = bufferSize; |
| 93 | } else { |
| 94 | // 0.5 seconds buffer |
| 95 | defaultBufferSize = ((int) (defaultFormat.getFrameRate() / 2)) * defaultFormat.getFrameSize(); |
| 96 | } |
| 97 | |
| 98 | // set the initial values to the defaults |
| 99 | this.format = defaultFormat; |
| 100 | this.bufferSize = defaultBufferSize; |
| 101 | } |
| 102 | |
| 103 | |
| 104 | // DATA LINE METHODS |
| 105 | |
| 106 | public void open(AudioFormat format, int bufferSize) throws LineUnavailableException { |
| 107 | //$$fb 2001-10-09: Bug #4517739: avoiding deadlock by synchronizing to mixer ! |
| 108 | synchronized (mixer) { |
| 109 | if (Printer.trace) Printer.trace("> AbstractDataLine.open(format, bufferSize) (class: "+getClass().getName()); |
| 110 | |
| 111 | // if the line is not currently open, try to open it with this format and buffer size |
| 112 | if (!isOpen()) { |
| 113 | // make sure that the format is specified correctly |
| 114 | // $$fb part of fix for 4679187: Clip.open() throws unexpected Exceptions |
| 115 | Toolkit.isFullySpecifiedAudioFormat(format); |
| 116 | |
| 117 | if (Printer.debug) Printer.debug(" need to open the mixer..."); |
| 118 | // reserve mixer resources for this line |
| 119 | //mixer.open(this, format, bufferSize); |
| 120 | mixer.open(this); |
| 121 | |
| 122 | try { |
| 123 | // open the data line. may throw LineUnavailableException. |
| 124 | implOpen(format, bufferSize); |
| 125 | |
| 126 | // if we succeeded, set the open state to true and send events |
| 127 | setOpen(true); |
| 128 | |
| 129 | } catch (LineUnavailableException e) { |
| 130 | // release mixer resources for this line and then throw the exception |
| 131 | mixer.close(this); |
| 132 | throw e; |
| 133 | } |
| 134 | } else { |
| 135 | if (Printer.debug) Printer.debug(" dataline already open"); |
| 136 | |
| 137 | // if the line is already open and the requested format differs from the |
| 138 | // current settings, throw an IllegalStateException |
| 139 | //$$fb 2002-04-02: fix for 4661602: Buffersize is checked when re-opening line |
| 140 | if (!format.matches(getFormat())) { |
| 141 | throw new IllegalStateException("Line is already open with format " + getFormat() + |
| 142 | " and bufferSize " + getBufferSize()); |
| 143 | } |
| 144 | //$$fb 2002-07-26: allow changing the buffersize of already open lines |
| 145 | if (bufferSize > 0) { |
| 146 | setBufferSize(bufferSize); |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | if (Printer.trace) Printer.trace("< AbstractDataLine.open(format, bufferSize) completed"); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | |
| 155 | public void open(AudioFormat format) throws LineUnavailableException { |
| 156 | open(format, AudioSystem.NOT_SPECIFIED); |
| 157 | } |
| 158 | |
| 159 | |
| 160 | /** |
| 161 | * This implementation always returns 0. |
| 162 | */ |
| 163 | public int available() { |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | |
| 168 | /** |
| 169 | * This implementation does nothing. |
| 170 | */ |
| 171 | public void drain() { |
| 172 | if (Printer.trace) Printer.trace("AbstractDataLine: drain"); |
| 173 | } |
| 174 | |
| 175 | |
| 176 | /** |
| 177 | * This implementation does nothing. |
| 178 | */ |
| 179 | public void flush() { |
| 180 | if (Printer.trace) Printer.trace("AbstractDataLine: flush"); |
| 181 | } |
| 182 | |
| 183 | |
| 184 | public void start() { |
| 185 | //$$fb 2001-10-09: Bug #4517739: avoiding deadlock by synchronizing to mixer ! |
| 186 | synchronized(mixer) { |
| 187 | if (Printer.trace) Printer.trace("> "+getClass().getName()+".start() - AbstractDataLine"); |
| 188 | |
| 189 | // $$kk: 06.06.99: if not open, this doesn't work....??? |
| 190 | if (isOpen()) { |
| 191 | |
| 192 | if (!isStartedRunning()) { |
| 193 | mixer.start(this); |
| 194 | implStart(); |
| 195 | running = true; |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | synchronized(lock) { |
| 201 | lock.notifyAll(); |
| 202 | } |
| 203 | |
| 204 | if (Printer.trace) Printer.trace("< "+getClass().getName()+".start() - AbstractDataLine"); |
| 205 | } |
| 206 | |
| 207 | |
| 208 | public void stop() { |
| 209 | |
| 210 | //$$fb 2001-10-09: Bug #4517739: avoiding deadlock by synchronizing to mixer ! |
| 211 | synchronized(mixer) { |
| 212 | if (Printer.trace) Printer.trace("> "+getClass().getName()+".stop() - AbstractDataLine"); |
| 213 | |
| 214 | // $$kk: 06.06.99: if not open, this doesn't work. |
| 215 | if (isOpen()) { |
| 216 | |
| 217 | if (isStartedRunning()) { |
| 218 | |
| 219 | implStop(); |
| 220 | mixer.stop(this); |
| 221 | |
| 222 | running = false; |
| 223 | |
| 224 | // $$kk: 11.10.99: this is not exactly correct, but will probably work |
| 225 | if (started && (!isActive())) { |
| 226 | setStarted(false); |
| 227 | } |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | synchronized(lock) { |
| 233 | lock.notifyAll(); |
| 234 | } |
| 235 | |
| 236 | if (Printer.trace) Printer.trace("< "+getClass().getName()+".stop() - AbstractDataLine"); |
| 237 | } |
| 238 | |
| 239 | // $$jb: 12.10.99: The official API for this is isRunning(). |
| 240 | // Per the denied RFE 4297981, |
| 241 | // the change to isStarted() is technically an unapproved API change. |
| 242 | // The 'started' variable is false when playback of data stops. |
| 243 | // It is changed throughout the implementation with setStarted(). |
| 244 | // This state is what should be returned by isRunning() in the API. |
| 245 | // Note that the 'running' variable is true between calls to |
| 246 | // start() and stop(). This state is accessed now through the |
| 247 | // isStartedRunning() method, defined below. I have not changed |
| 248 | // the variable names at this point, since 'running' is accessed |
| 249 | // in MixerSourceLine and MixerClip, and I want to touch as little |
| 250 | // code as possible to change isStarted() back to isRunning(). |
| 251 | |
| 252 | public boolean isRunning() { |
| 253 | return started; |
| 254 | } |
| 255 | |
| 256 | public boolean isActive() { |
| 257 | return active; |
| 258 | } |
| 259 | |
| 260 | |
| 261 | public long getMicrosecondPosition() { |
| 262 | |
| 263 | long microseconds = getLongFramePosition(); |
| 264 | if (microseconds != AudioSystem.NOT_SPECIFIED) { |
| 265 | microseconds = Toolkit.frames2micros(getFormat(), microseconds); |
| 266 | } |
| 267 | return microseconds; |
| 268 | } |
| 269 | |
| 270 | |
| 271 | public AudioFormat getFormat() { |
| 272 | return format; |
| 273 | } |
| 274 | |
| 275 | |
| 276 | public int getBufferSize() { |
| 277 | return bufferSize; |
| 278 | } |
| 279 | |
| 280 | /** |
| 281 | * This implementation does NOT change the buffer size |
| 282 | */ |
| 283 | public int setBufferSize(int newSize) { |
| 284 | return getBufferSize(); |
| 285 | } |
| 286 | |
| 287 | /** |
| 288 | * This implementation returns AudioSystem.NOT_SPECIFIED. |
| 289 | */ |
| 290 | public float getLevel() { |
| 291 | return (float)AudioSystem.NOT_SPECIFIED; |
| 292 | } |
| 293 | |
| 294 | |
| 295 | // HELPER METHODS |
| 296 | |
| 297 | /** |
| 298 | * running is true after start is called and before stop is called, |
| 299 | * regardless of whether data is actually being presented. |
| 300 | */ |
| 301 | // $$jb: 12.10.99: calling this method isRunning() conflicts with |
| 302 | // the official API that was once called isStarted(). Since we |
| 303 | // use this method throughout the implementation, I am renaming |
| 304 | // it to isStartedRunning(). This is part of backing out the |
| 305 | // change denied in RFE 4297981. |
| 306 | |
| 307 | protected boolean isStartedRunning() { |
| 308 | return running; |
| 309 | } |
| 310 | |
| 311 | /** |
| 312 | * This method sets the active state and generates |
| 313 | * events if it changes. |
| 314 | */ |
| 315 | protected void setActive(boolean active) { |
| 316 | |
| 317 | if (Printer.trace) Printer.trace("> AbstractDataLine: setActive(" + active + ")"); |
| 318 | |
| 319 | //boolean sendEvents = false; |
| 320 | //long position = getLongFramePosition(); |
| 321 | |
| 322 | synchronized (this) { |
| 323 | |
| 324 | //if (Printer.debug) Printer.debug(" AbstractDataLine: setActive: this.active: " + this.active); |
| 325 | //if (Printer.debug) Printer.debug(" active: " + active); |
| 326 | |
| 327 | if (this.active != active) { |
| 328 | this.active = active; |
| 329 | //sendEvents = true; |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | //if (Printer.debug) Printer.debug(" this.active: " + this.active); |
| 334 | //if (Printer.debug) Printer.debug(" sendEvents: " + sendEvents); |
| 335 | |
| 336 | |
| 337 | // $$kk: 11.19.99: take ACTIVE / INACTIVE / EOM events out; |
| 338 | // putting them in is technically an API change. |
| 339 | // do not generate ACTIVE / INACTIVE events for now |
| 340 | // if (sendEvents) { |
| 341 | // |
| 342 | // if (active) { |
| 343 | // sendEvents(new LineEvent(this, LineEvent.Type.ACTIVE, position)); |
| 344 | // } else { |
| 345 | // sendEvents(new LineEvent(this, LineEvent.Type.INACTIVE, position)); |
| 346 | // } |
| 347 | //} |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * This method sets the started state and generates |
| 352 | * events if it changes. |
| 353 | */ |
| 354 | protected void setStarted(boolean started) { |
| 355 | |
| 356 | if (Printer.trace) Printer.trace("> AbstractDataLine: setStarted(" + started + ")"); |
| 357 | |
| 358 | boolean sendEvents = false; |
| 359 | long position = getLongFramePosition(); |
| 360 | |
| 361 | synchronized (this) { |
| 362 | |
| 363 | //if (Printer.debug) Printer.debug(" AbstractDataLine: setStarted: this.started: " + this.started); |
| 364 | //if (Printer.debug) Printer.debug(" started: " + started); |
| 365 | |
| 366 | if (this.started != started) { |
| 367 | this.started = started; |
| 368 | sendEvents = true; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | //if (Printer.debug) Printer.debug(" this.started: " + this.started); |
| 373 | //if (Printer.debug) Printer.debug(" sendEvents: " + sendEvents); |
| 374 | |
| 375 | if (sendEvents) { |
| 376 | |
| 377 | if (started) { |
| 378 | sendEvents(new LineEvent(this, LineEvent.Type.START, position)); |
| 379 | } else { |
| 380 | sendEvents(new LineEvent(this, LineEvent.Type.STOP, position)); |
| 381 | } |
| 382 | } |
| 383 | if (Printer.trace) Printer.trace("< AbstractDataLine: setStarted completed"); |
| 384 | } |
| 385 | |
| 386 | |
| 387 | /** |
| 388 | * This method generates a STOP event and sets the started state to false. |
| 389 | * It is here for historic reasons when an EOM event existed. |
| 390 | */ |
| 391 | protected void setEOM() { |
| 392 | |
| 393 | if (Printer.trace) Printer.trace("> AbstractDataLine: setEOM()"); |
| 394 | //$$fb 2002-04-21: sometimes, 2 STOP events are generated. |
| 395 | // better use setStarted() to send STOP event. |
| 396 | setStarted(false); |
| 397 | if (Printer.trace) Printer.trace("< AbstractDataLine: setEOM() completed"); |
| 398 | } |
| 399 | |
| 400 | |
| 401 | |
| 402 | |
| 403 | // OVERRIDES OF ABSTRACT LINE METHODS |
| 404 | |
| 405 | /** |
| 406 | * Try to open the line with the current format and buffer size values. |
| 407 | * If the line is not open, these will be the defaults. If the |
| 408 | * line is open, this should return quietly because the values |
| 409 | * requested will match the current ones. |
| 410 | */ |
| 411 | public void open() throws LineUnavailableException { |
| 412 | |
| 413 | if (Printer.trace) Printer.trace("> "+getClass().getName()+".open() - AbstractDataLine"); |
| 414 | |
| 415 | // this may throw a LineUnavailableException. |
| 416 | open(format, bufferSize); |
| 417 | if (Printer.trace) Printer.trace("< "+getClass().getName()+".open() - AbstractDataLine"); |
| 418 | } |
| 419 | |
| 420 | |
| 421 | /** |
| 422 | * This should also stop the line. The closed line should not be running or active. |
| 423 | * After we close the line, we reset the format and buffer size to the defaults. |
| 424 | */ |
| 425 | public void close() { |
| 426 | //$$fb 2001-10-09: Bug #4517739: avoiding deadlock by synchronizing to mixer ! |
| 427 | synchronized (mixer) { |
| 428 | if (Printer.trace) Printer.trace("> "+getClass().getName()+".close() - in AbstractDataLine."); |
| 429 | |
| 430 | if (isOpen()) { |
| 431 | |
| 432 | // stop |
| 433 | stop(); |
| 434 | |
| 435 | // set the open state to false and send events |
| 436 | setOpen(false); |
| 437 | |
| 438 | // close resources for this line |
| 439 | implClose(); |
| 440 | |
| 441 | // release mixer resources for this line |
| 442 | mixer.close(this); |
| 443 | |
| 444 | // reset format and buffer size to the defaults |
| 445 | format = defaultFormat; |
| 446 | bufferSize = defaultBufferSize; |
| 447 | } |
| 448 | } |
| 449 | if (Printer.trace) Printer.trace("< "+getClass().getName()+".close() - in AbstractDataLine"); |
| 450 | } |
| 451 | |
| 452 | |
| 453 | // IMPLEMENTATIONS OF ABSTRACT LINE ABSTRACE METHODS |
| 454 | |
| 455 | |
| 456 | // ABSTRACT METHODS |
| 457 | |
| 458 | abstract void implOpen(AudioFormat format, int bufferSize) throws LineUnavailableException; |
| 459 | abstract void implClose(); |
| 460 | |
| 461 | abstract void implStart(); |
| 462 | abstract void implStop(); |
| 463 | } |