Bjorn Bringert | 50e657b | 2011-03-08 16:00:40 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| 5 | * use this file except in compliance with the License. You may obtain a copy of |
| 6 | * the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| 12 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 13 | * License for the specific language governing permissions and limitations under |
| 14 | * the License. |
| 15 | */ |
| 16 | package android.speech.tts; |
| 17 | |
| 18 | import android.app.Service; |
| 19 | import android.content.Intent; |
| 20 | import android.net.Uri; |
| 21 | import android.os.Bundle; |
| 22 | import android.os.ConditionVariable; |
| 23 | import android.os.Handler; |
| 24 | import android.os.HandlerThread; |
| 25 | import android.os.IBinder; |
| 26 | import android.os.Looper; |
| 27 | import android.os.Message; |
| 28 | import android.os.MessageQueue; |
| 29 | import android.os.RemoteCallbackList; |
| 30 | import android.os.RemoteException; |
| 31 | import android.provider.Settings; |
| 32 | import android.speech.tts.TextToSpeech.Engine; |
| 33 | import android.text.TextUtils; |
| 34 | import android.util.Log; |
| 35 | |
| 36 | import java.io.File; |
| 37 | import java.io.IOException; |
| 38 | import java.util.HashMap; |
| 39 | import java.util.Locale; |
| 40 | |
| 41 | |
| 42 | /** |
| 43 | * Abstract base class for TTS engine implementations. |
Bjorn Bringert | 50e657b | 2011-03-08 16:00:40 +0000 | [diff] [blame] | 44 | */ |
| 45 | public abstract class TextToSpeechService extends Service { |
| 46 | |
| 47 | private static final boolean DBG = false; |
| 48 | private static final String TAG = "TextToSpeechService"; |
| 49 | |
| 50 | private static final int MAX_SPEECH_ITEM_CHAR_LENGTH = 4000; |
| 51 | private static final String SYNTH_THREAD_NAME = "SynthThread"; |
| 52 | |
| 53 | private SynthHandler mSynthHandler; |
| 54 | |
| 55 | private CallbackMap mCallbacks; |
| 56 | |
| 57 | @Override |
| 58 | public void onCreate() { |
| 59 | if (DBG) Log.d(TAG, "onCreate()"); |
| 60 | super.onCreate(); |
| 61 | |
| 62 | SynthThread synthThread = new SynthThread(); |
| 63 | synthThread.start(); |
| 64 | mSynthHandler = new SynthHandler(synthThread.getLooper()); |
| 65 | |
| 66 | mCallbacks = new CallbackMap(); |
| 67 | |
| 68 | // Load default language |
| 69 | onLoadLanguage(getDefaultLanguage(), getDefaultCountry(), getDefaultVariant()); |
| 70 | } |
| 71 | |
| 72 | @Override |
| 73 | public void onDestroy() { |
| 74 | if (DBG) Log.d(TAG, "onDestroy()"); |
| 75 | |
| 76 | // Tell the synthesizer to stop |
| 77 | mSynthHandler.quit(); |
| 78 | |
| 79 | // Unregister all callbacks. |
| 80 | mCallbacks.kill(); |
| 81 | |
| 82 | super.onDestroy(); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Checks whether the engine supports a given language. |
| 87 | * |
| 88 | * Can be called on multiple threads. |
| 89 | * |
| 90 | * @param lang ISO-3 language code. |
| 91 | * @param country ISO-3 country code. May be empty or null. |
| 92 | * @param variant Language variant. May be empty or null. |
| 93 | * @return Code indicating the support status for the locale. |
| 94 | * One of {@link TextToSpeech#LANG_AVAILABLE}, |
| 95 | * {@link TextToSpeech#LANG_COUNTRY_AVAILABLE}, |
| 96 | * {@link TextToSpeech#LANG_COUNTRY_VAR_AVAILABLE}, |
| 97 | * {@link TextToSpeech#LANG_MISSING_DATA} |
| 98 | * {@link TextToSpeech#LANG_NOT_SUPPORTED}. |
| 99 | */ |
| 100 | protected abstract int onIsLanguageAvailable(String lang, String country, String variant); |
| 101 | |
| 102 | /** |
| 103 | * Returns the language, country and variant currently being used by the TTS engine. |
| 104 | * |
| 105 | * Can be called on multiple threads. |
| 106 | * |
| 107 | * @return A 3-element array, containing language (ISO 3-letter code), |
| 108 | * country (ISO 3-letter code) and variant used by the engine. |
| 109 | * The country and variant may be {@code ""}. If country is empty, then variant must |
| 110 | * be empty too. |
| 111 | * @see Locale#getISO3Language() |
| 112 | * @see Locale#getISO3Country() |
| 113 | * @see Locale#getVariant() |
| 114 | */ |
| 115 | protected abstract String[] onGetLanguage(); |
| 116 | |
| 117 | /** |
| 118 | * Notifies the engine that it should load a speech synthesis language. There is no guarantee |
| 119 | * that this method is always called before the language is used for synthesis. It is merely |
| 120 | * a hint to the engine that it will probably get some synthesis requests for this language |
| 121 | * at some point in the future. |
| 122 | * |
| 123 | * Can be called on multiple threads. |
| 124 | * |
| 125 | * @param lang ISO-3 language code. |
| 126 | * @param country ISO-3 country code. May be empty or null. |
| 127 | * @param variant Language variant. May be empty or null. |
| 128 | * @return Code indicating the support status for the locale. |
| 129 | * One of {@link TextToSpeech#LANG_AVAILABLE}, |
| 130 | * {@link TextToSpeech#LANG_COUNTRY_AVAILABLE}, |
| 131 | * {@link TextToSpeech#LANG_COUNTRY_VAR_AVAILABLE}, |
| 132 | * {@link TextToSpeech#LANG_MISSING_DATA} |
| 133 | * {@link TextToSpeech#LANG_NOT_SUPPORTED}. |
| 134 | */ |
| 135 | protected abstract int onLoadLanguage(String lang, String country, String variant); |
| 136 | |
| 137 | /** |
| 138 | * Notifies the service that it should stop any in-progress speech synthesis. |
| 139 | * This method can be called even if no speech synthesis is currently in progress. |
| 140 | * |
| 141 | * Can be called on multiple threads, but not on the synthesis thread. |
| 142 | */ |
| 143 | protected abstract void onStop(); |
| 144 | |
| 145 | /** |
| 146 | * Tells the service to synthesize speech from the given text. This method should |
| 147 | * block until the synthesis is finished. |
| 148 | * |
| 149 | * Called on the synthesis thread. |
| 150 | * |
Bjorn Bringert | 360eb16 | 2011-04-19 09:20:35 +0100 | [diff] [blame] | 151 | * @param request The synthesis request. The method should use the methods in the request |
| 152 | * object to communicate the results of the synthesis. |
Bjorn Bringert | 50e657b | 2011-03-08 16:00:40 +0000 | [diff] [blame] | 153 | */ |
Bjorn Bringert | 360eb16 | 2011-04-19 09:20:35 +0100 | [diff] [blame] | 154 | protected abstract void onSynthesizeText(SynthesisRequest request); |
Bjorn Bringert | 50e657b | 2011-03-08 16:00:40 +0000 | [diff] [blame] | 155 | |
| 156 | private boolean areDefaultsEnforced() { |
| 157 | return getSecureSettingInt(Settings.Secure.TTS_USE_DEFAULTS, |
| 158 | TextToSpeech.Engine.USE_DEFAULTS) == 1; |
| 159 | } |
| 160 | |
| 161 | private int getDefaultSpeechRate() { |
| 162 | return getSecureSettingInt(Settings.Secure.TTS_DEFAULT_RATE, Engine.DEFAULT_RATE); |
| 163 | } |
| 164 | |
| 165 | private String getDefaultLanguage() { |
| 166 | return getSecureSettingString(Settings.Secure.TTS_DEFAULT_LANG, |
| 167 | Locale.getDefault().getISO3Language()); |
| 168 | } |
| 169 | |
| 170 | private String getDefaultCountry() { |
| 171 | return getSecureSettingString(Settings.Secure.TTS_DEFAULT_COUNTRY, |
| 172 | Locale.getDefault().getISO3Country()); |
| 173 | } |
| 174 | |
| 175 | private String getDefaultVariant() { |
| 176 | return getSecureSettingString(Settings.Secure.TTS_DEFAULT_VARIANT, |
| 177 | Locale.getDefault().getVariant()); |
| 178 | } |
| 179 | |
| 180 | private int getSecureSettingInt(String name, int defaultValue) { |
| 181 | return Settings.Secure.getInt(getContentResolver(), name, defaultValue); |
| 182 | } |
| 183 | |
| 184 | private String getSecureSettingString(String name, String defaultValue) { |
| 185 | String value = Settings.Secure.getString(getContentResolver(), name); |
| 186 | return value != null ? value : defaultValue; |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * Synthesizer thread. This thread is used to run {@link SynthHandler}. |
| 191 | */ |
| 192 | private class SynthThread extends HandlerThread implements MessageQueue.IdleHandler { |
| 193 | |
| 194 | private boolean mFirstIdle = true; |
| 195 | |
| 196 | public SynthThread() { |
| 197 | super(SYNTH_THREAD_NAME, android.os.Process.THREAD_PRIORITY_AUDIO); |
| 198 | } |
| 199 | |
| 200 | @Override |
| 201 | protected void onLooperPrepared() { |
| 202 | getLooper().getQueue().addIdleHandler(this); |
| 203 | } |
| 204 | |
| 205 | @Override |
| 206 | public boolean queueIdle() { |
| 207 | if (mFirstIdle) { |
| 208 | mFirstIdle = false; |
| 209 | } else { |
| 210 | broadcastTtsQueueProcessingCompleted(); |
| 211 | } |
| 212 | return true; |
| 213 | } |
| 214 | |
| 215 | private void broadcastTtsQueueProcessingCompleted() { |
| 216 | Intent i = new Intent(TextToSpeech.ACTION_TTS_QUEUE_PROCESSING_COMPLETED); |
| 217 | if (DBG) Log.d(TAG, "Broadcasting: " + i); |
| 218 | sendBroadcast(i); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | private class SynthHandler extends Handler { |
| 223 | |
| 224 | private SpeechItem mCurrentSpeechItem = null; |
| 225 | |
| 226 | public SynthHandler(Looper looper) { |
| 227 | super(looper); |
| 228 | } |
| 229 | |
| 230 | private void dispatchUtteranceCompleted(SpeechItem item) { |
| 231 | String utteranceId = item.getUtteranceId(); |
| 232 | if (!TextUtils.isEmpty(utteranceId)) { |
| 233 | mCallbacks.dispatchUtteranceCompleted(item.getCallingApp(), utteranceId); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | private synchronized SpeechItem getCurrentSpeechItem() { |
| 238 | return mCurrentSpeechItem; |
| 239 | } |
| 240 | |
| 241 | private synchronized SpeechItem setCurrentSpeechItem(SpeechItem speechItem) { |
| 242 | SpeechItem old = mCurrentSpeechItem; |
| 243 | mCurrentSpeechItem = speechItem; |
| 244 | return old; |
| 245 | } |
| 246 | |
| 247 | public boolean isSpeaking() { |
| 248 | return getCurrentSpeechItem() != null; |
| 249 | } |
| 250 | |
| 251 | public void quit() { |
| 252 | // Don't process any more speech items |
| 253 | getLooper().quit(); |
| 254 | // Stop the current speech item |
| 255 | SpeechItem current = setCurrentSpeechItem(null); |
| 256 | if (current != null) { |
| 257 | current.stop(); |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | /** |
| 262 | * Adds a speech item to the queue. |
| 263 | * |
| 264 | * Called on a service binder thread. |
| 265 | */ |
| 266 | public int enqueueSpeechItem(int queueMode, final SpeechItem speechItem) { |
| 267 | if (!speechItem.isValid()) { |
| 268 | return TextToSpeech.ERROR; |
| 269 | } |
| 270 | // TODO: The old code also supported the undocumented queueMode == 2, |
| 271 | // which clears out all pending items from the calling app, as well as all |
| 272 | // non-file items from other apps. |
| 273 | if (queueMode == TextToSpeech.QUEUE_FLUSH) { |
| 274 | stop(speechItem.getCallingApp()); |
| 275 | } |
| 276 | Runnable runnable = new Runnable() { |
| 277 | @Override |
| 278 | public void run() { |
| 279 | setCurrentSpeechItem(speechItem); |
| 280 | if (speechItem.play() == TextToSpeech.SUCCESS) { |
| 281 | dispatchUtteranceCompleted(speechItem); |
| 282 | } |
| 283 | setCurrentSpeechItem(null); |
| 284 | } |
| 285 | }; |
| 286 | Message msg = Message.obtain(this, runnable); |
| 287 | // The obj is used to remove all callbacks from the given app in stop(String). |
| 288 | msg.obj = speechItem.getCallingApp(); |
| 289 | if (sendMessage(msg)) { |
| 290 | return TextToSpeech.SUCCESS; |
| 291 | } else { |
| 292 | Log.w(TAG, "SynthThread has quit"); |
| 293 | return TextToSpeech.ERROR; |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | /** |
| 298 | * Stops all speech output and removes any utterances still in the queue for |
| 299 | * the calling app. |
| 300 | * |
| 301 | * Called on a service binder thread. |
| 302 | */ |
| 303 | public int stop(String callingApp) { |
| 304 | if (TextUtils.isEmpty(callingApp)) { |
| 305 | return TextToSpeech.ERROR; |
| 306 | } |
| 307 | removeCallbacksAndMessages(callingApp); |
| 308 | SpeechItem current = setCurrentSpeechItem(null); |
| 309 | if (current != null && TextUtils.equals(callingApp, current.getCallingApp())) { |
| 310 | current.stop(); |
| 311 | } |
| 312 | return TextToSpeech.SUCCESS; |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | /** |
| 317 | * An item in the synth thread queue. |
| 318 | */ |
| 319 | private static abstract class SpeechItem { |
| 320 | private final String mCallingApp; |
| 321 | private final Bundle mParams; |
| 322 | private boolean mStarted = false; |
| 323 | private boolean mStopped = false; |
| 324 | |
| 325 | public SpeechItem(String callingApp, Bundle params) { |
| 326 | mCallingApp = callingApp; |
| 327 | mParams = params; |
| 328 | } |
| 329 | |
| 330 | public String getCallingApp() { |
| 331 | return mCallingApp; |
| 332 | } |
| 333 | |
| 334 | /** |
| 335 | * Checker whether the item is valid. If this method returns false, the item should not |
| 336 | * be played. |
| 337 | */ |
| 338 | public abstract boolean isValid(); |
| 339 | |
| 340 | /** |
| 341 | * Plays the speech item. Blocks until playback is finished. |
| 342 | * Must not be called more than once. |
| 343 | * |
| 344 | * Only called on the synthesis thread. |
| 345 | * |
| 346 | * @return {@link TextToSpeech#SUCCESS} or {@link TextToSpeech#ERROR}. |
| 347 | */ |
| 348 | public int play() { |
| 349 | synchronized (this) { |
| 350 | if (mStarted) { |
| 351 | throw new IllegalStateException("play() called twice"); |
| 352 | } |
| 353 | mStarted = true; |
| 354 | } |
| 355 | return playImpl(); |
| 356 | } |
| 357 | |
| 358 | /** |
| 359 | * Stops the speech item. |
| 360 | * Must not be called more than once. |
| 361 | * |
| 362 | * Can be called on multiple threads, but not on the synthesis thread. |
| 363 | */ |
| 364 | public void stop() { |
| 365 | synchronized (this) { |
| 366 | if (mStopped) { |
| 367 | throw new IllegalStateException("stop() called twice"); |
| 368 | } |
| 369 | mStopped = true; |
| 370 | } |
| 371 | stopImpl(); |
| 372 | } |
| 373 | |
| 374 | protected abstract int playImpl(); |
| 375 | |
| 376 | protected abstract void stopImpl(); |
| 377 | |
| 378 | public int getStreamType() { |
| 379 | return getIntParam(Engine.KEY_PARAM_STREAM, Engine.DEFAULT_STREAM); |
| 380 | } |
| 381 | |
| 382 | public float getVolume() { |
| 383 | return getFloatParam(Engine.KEY_PARAM_VOLUME, Engine.DEFAULT_VOLUME); |
| 384 | } |
| 385 | |
| 386 | public float getPan() { |
| 387 | return getFloatParam(Engine.KEY_PARAM_PAN, Engine.DEFAULT_PAN); |
| 388 | } |
| 389 | |
| 390 | public String getUtteranceId() { |
| 391 | return getStringParam(Engine.KEY_PARAM_UTTERANCE_ID, null); |
| 392 | } |
| 393 | |
| 394 | protected String getStringParam(String key, String defaultValue) { |
| 395 | return mParams == null ? defaultValue : mParams.getString(key, defaultValue); |
| 396 | } |
| 397 | |
| 398 | protected int getIntParam(String key, int defaultValue) { |
| 399 | return mParams == null ? defaultValue : mParams.getInt(key, defaultValue); |
| 400 | } |
| 401 | |
| 402 | protected float getFloatParam(String key, float defaultValue) { |
| 403 | return mParams == null ? defaultValue : mParams.getFloat(key, defaultValue); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | private class SynthesisSpeechItem extends SpeechItem { |
| 408 | private final String mText; |
| 409 | private SynthesisRequest mSynthesisRequest; |
| 410 | |
| 411 | public SynthesisSpeechItem(String callingApp, Bundle params, String text) { |
| 412 | super(callingApp, params); |
| 413 | mText = text; |
| 414 | } |
| 415 | |
| 416 | public String getText() { |
| 417 | return mText; |
| 418 | } |
| 419 | |
| 420 | @Override |
| 421 | public boolean isValid() { |
| 422 | if (TextUtils.isEmpty(mText)) { |
| 423 | Log.w(TAG, "Got empty text"); |
| 424 | return false; |
| 425 | } |
| 426 | if (mText.length() >= MAX_SPEECH_ITEM_CHAR_LENGTH){ |
| 427 | Log.w(TAG, "Text too long: " + mText.length() + " chars"); |
| 428 | return false; |
| 429 | } |
| 430 | return true; |
| 431 | } |
| 432 | |
| 433 | @Override |
| 434 | protected int playImpl() { |
| 435 | SynthesisRequest synthesisRequest; |
| 436 | synchronized (this) { |
| 437 | mSynthesisRequest = createSynthesisRequest(); |
| 438 | synthesisRequest = mSynthesisRequest; |
| 439 | } |
| 440 | setRequestParams(synthesisRequest); |
Bjorn Bringert | 360eb16 | 2011-04-19 09:20:35 +0100 | [diff] [blame] | 441 | TextToSpeechService.this.onSynthesizeText(synthesisRequest); |
| 442 | return synthesisRequest.isDone() ? TextToSpeech.SUCCESS : TextToSpeech.ERROR; |
Bjorn Bringert | 50e657b | 2011-03-08 16:00:40 +0000 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | protected SynthesisRequest createSynthesisRequest() { |
| 446 | return new PlaybackSynthesisRequest(mText, getStreamType(), getVolume(), getPan()); |
| 447 | } |
| 448 | |
| 449 | private void setRequestParams(SynthesisRequest request) { |
| 450 | if (areDefaultsEnforced()) { |
| 451 | request.setLanguage(getDefaultLanguage(), getDefaultCountry(), getDefaultVariant()); |
| 452 | request.setSpeechRate(getDefaultSpeechRate()); |
| 453 | } else { |
| 454 | request.setLanguage(getLanguage(), getCountry(), getVariant()); |
| 455 | request.setSpeechRate(getSpeechRate()); |
| 456 | } |
| 457 | request.setPitch(getPitch()); |
| 458 | } |
| 459 | |
| 460 | @Override |
| 461 | protected void stopImpl() { |
| 462 | SynthesisRequest synthesisRequest; |
| 463 | synchronized (this) { |
| 464 | synthesisRequest = mSynthesisRequest; |
| 465 | } |
| 466 | synthesisRequest.stop(); |
| 467 | TextToSpeechService.this.onStop(); |
| 468 | } |
| 469 | |
| 470 | public String getLanguage() { |
| 471 | return getStringParam(Engine.KEY_PARAM_LANGUAGE, getDefaultLanguage()); |
| 472 | } |
| 473 | |
| 474 | private boolean hasLanguage() { |
| 475 | return !TextUtils.isEmpty(getStringParam(Engine.KEY_PARAM_LANGUAGE, null)); |
| 476 | } |
| 477 | |
| 478 | private String getCountry() { |
| 479 | if (!hasLanguage()) return getDefaultCountry(); |
| 480 | return getStringParam(Engine.KEY_PARAM_COUNTRY, ""); |
| 481 | } |
| 482 | |
| 483 | private String getVariant() { |
| 484 | if (!hasLanguage()) return getDefaultVariant(); |
| 485 | return getStringParam(Engine.KEY_PARAM_VARIANT, ""); |
| 486 | } |
| 487 | |
| 488 | private int getSpeechRate() { |
| 489 | return getIntParam(Engine.KEY_PARAM_RATE, getDefaultSpeechRate()); |
| 490 | } |
| 491 | |
| 492 | private int getPitch() { |
| 493 | return getIntParam(Engine.KEY_PARAM_PITCH, Engine.DEFAULT_PITCH); |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | private class SynthesisToFileSpeechItem extends SynthesisSpeechItem { |
| 498 | private final File mFile; |
| 499 | |
| 500 | public SynthesisToFileSpeechItem(String callingApp, Bundle params, String text, |
| 501 | File file) { |
| 502 | super(callingApp, params, text); |
| 503 | mFile = file; |
| 504 | } |
| 505 | |
| 506 | @Override |
| 507 | public boolean isValid() { |
| 508 | if (!super.isValid()) { |
| 509 | return false; |
| 510 | } |
| 511 | return checkFile(mFile); |
| 512 | } |
| 513 | |
| 514 | @Override |
| 515 | protected SynthesisRequest createSynthesisRequest() { |
| 516 | return new FileSynthesisRequest(getText(), mFile); |
| 517 | } |
| 518 | |
| 519 | /** |
| 520 | * Checks that the given file can be used for synthesis output. |
| 521 | */ |
| 522 | private boolean checkFile(File file) { |
| 523 | try { |
| 524 | if (file.exists()) { |
| 525 | Log.v(TAG, "File " + file + " exists, deleting."); |
| 526 | if (!file.delete()) { |
| 527 | Log.e(TAG, "Failed to delete " + file); |
| 528 | return false; |
| 529 | } |
| 530 | } |
| 531 | if (!file.createNewFile()) { |
| 532 | Log.e(TAG, "Can't create file " + file); |
| 533 | return false; |
| 534 | } |
| 535 | if (!file.delete()) { |
| 536 | Log.e(TAG, "Failed to delete " + file); |
| 537 | return false; |
| 538 | } |
| 539 | return true; |
| 540 | } catch (IOException e) { |
| 541 | Log.e(TAG, "Can't use " + file + " due to exception " + e); |
| 542 | return false; |
| 543 | } |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | private class AudioSpeechItem extends SpeechItem { |
| 548 | |
| 549 | private final BlockingMediaPlayer mPlayer; |
| 550 | |
| 551 | public AudioSpeechItem(String callingApp, Bundle params, Uri uri) { |
| 552 | super(callingApp, params); |
| 553 | mPlayer = new BlockingMediaPlayer(TextToSpeechService.this, uri, getStreamType()); |
| 554 | } |
| 555 | |
| 556 | @Override |
| 557 | public boolean isValid() { |
| 558 | return true; |
| 559 | } |
| 560 | |
| 561 | @Override |
| 562 | protected int playImpl() { |
| 563 | return mPlayer.startAndWait() ? TextToSpeech.SUCCESS : TextToSpeech.ERROR; |
| 564 | } |
| 565 | |
| 566 | @Override |
| 567 | protected void stopImpl() { |
| 568 | mPlayer.stop(); |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | private class SilenceSpeechItem extends SpeechItem { |
| 573 | private final long mDuration; |
| 574 | private final ConditionVariable mDone; |
| 575 | |
| 576 | public SilenceSpeechItem(String callingApp, Bundle params, long duration) { |
| 577 | super(callingApp, params); |
| 578 | mDuration = duration; |
| 579 | mDone = new ConditionVariable(); |
| 580 | } |
| 581 | |
| 582 | @Override |
| 583 | public boolean isValid() { |
| 584 | return true; |
| 585 | } |
| 586 | |
| 587 | @Override |
| 588 | protected int playImpl() { |
| 589 | boolean aborted = mDone.block(mDuration); |
| 590 | return aborted ? TextToSpeech.ERROR : TextToSpeech.SUCCESS; |
| 591 | } |
| 592 | |
| 593 | @Override |
| 594 | protected void stopImpl() { |
| 595 | mDone.open(); |
| 596 | } |
| 597 | } |
| 598 | |
| 599 | @Override |
| 600 | public IBinder onBind(Intent intent) { |
| 601 | if (TextToSpeech.Engine.INTENT_ACTION_TTS_SERVICE.equals(intent.getAction())) { |
| 602 | return mBinder; |
| 603 | } |
| 604 | return null; |
| 605 | } |
| 606 | |
| 607 | /** |
| 608 | * Binder returned from {@code #onBind(Intent)}. The methods in this class can be |
| 609 | * called called from several different threads. |
| 610 | */ |
| 611 | private final ITextToSpeechService.Stub mBinder = new ITextToSpeechService.Stub() { |
| 612 | |
| 613 | public int speak(String callingApp, String text, int queueMode, Bundle params) { |
| 614 | SpeechItem item = new SynthesisSpeechItem(callingApp, params, text); |
| 615 | return mSynthHandler.enqueueSpeechItem(queueMode, item); |
| 616 | } |
| 617 | |
| 618 | public int synthesizeToFile(String callingApp, String text, String filename, |
| 619 | Bundle params) { |
| 620 | File file = new File(filename); |
| 621 | SpeechItem item = new SynthesisToFileSpeechItem(callingApp, params, text, file); |
| 622 | return mSynthHandler.enqueueSpeechItem(TextToSpeech.QUEUE_ADD, item); |
| 623 | } |
| 624 | |
| 625 | public int playAudio(String callingApp, Uri audioUri, int queueMode, Bundle params) { |
| 626 | SpeechItem item = new AudioSpeechItem(callingApp, params, audioUri); |
| 627 | return mSynthHandler.enqueueSpeechItem(queueMode, item); |
| 628 | } |
| 629 | |
| 630 | public int playSilence(String callingApp, long duration, int queueMode, Bundle params) { |
| 631 | SpeechItem item = new SilenceSpeechItem(callingApp, params, duration); |
| 632 | return mSynthHandler.enqueueSpeechItem(queueMode, item); |
| 633 | } |
| 634 | |
| 635 | public boolean isSpeaking() { |
| 636 | return mSynthHandler.isSpeaking(); |
| 637 | } |
| 638 | |
| 639 | public int stop(String callingApp) { |
| 640 | return mSynthHandler.stop(callingApp); |
| 641 | } |
| 642 | |
| 643 | public String[] getLanguage() { |
| 644 | return onGetLanguage(); |
| 645 | } |
| 646 | |
| 647 | public int isLanguageAvailable(String lang, String country, String variant) { |
| 648 | return onIsLanguageAvailable(lang, country, variant); |
| 649 | } |
| 650 | |
| 651 | public int loadLanguage(String lang, String country, String variant) { |
| 652 | return onLoadLanguage(lang, country, variant); |
| 653 | } |
| 654 | |
| 655 | public void setCallback(String packageName, ITextToSpeechCallback cb) { |
| 656 | mCallbacks.setCallback(packageName, cb); |
| 657 | } |
| 658 | }; |
| 659 | |
| 660 | private class CallbackMap extends RemoteCallbackList<ITextToSpeechCallback> { |
| 661 | |
| 662 | private final HashMap<String, ITextToSpeechCallback> mAppToCallback |
| 663 | = new HashMap<String, ITextToSpeechCallback>(); |
| 664 | |
| 665 | public void setCallback(String packageName, ITextToSpeechCallback cb) { |
| 666 | synchronized (mAppToCallback) { |
| 667 | ITextToSpeechCallback old; |
| 668 | if (cb != null) { |
| 669 | register(cb, packageName); |
| 670 | old = mAppToCallback.put(packageName, cb); |
| 671 | } else { |
| 672 | old = mAppToCallback.remove(packageName); |
| 673 | } |
| 674 | if (old != null && old != cb) { |
| 675 | unregister(old); |
| 676 | } |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | public void dispatchUtteranceCompleted(String packageName, String utteranceId) { |
| 681 | ITextToSpeechCallback cb; |
| 682 | synchronized (mAppToCallback) { |
| 683 | cb = mAppToCallback.get(packageName); |
| 684 | } |
| 685 | if (cb == null) return; |
| 686 | try { |
| 687 | cb.utteranceCompleted(utteranceId); |
| 688 | } catch (RemoteException e) { |
| 689 | Log.e(TAG, "Callback failed: " + e); |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | @Override |
| 694 | public void onCallbackDied(ITextToSpeechCallback callback, Object cookie) { |
| 695 | String packageName = (String) cookie; |
| 696 | synchronized (mAppToCallback) { |
| 697 | mAppToCallback.remove(packageName); |
| 698 | } |
| 699 | mSynthHandler.stop(packageName); |
| 700 | } |
| 701 | |
| 702 | @Override |
| 703 | public void kill() { |
| 704 | synchronized (mAppToCallback) { |
| 705 | mAppToCallback.clear(); |
| 706 | super.kill(); |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | } |
| 711 | |
| 712 | } |