diff options
Diffstat (limited to 'core/java/android/speech/tts/TextToSpeech.java')
| -rwxr-xr-x | core/java/android/speech/tts/TextToSpeech.java | 1199 |
1 files changed, 537 insertions, 662 deletions
diff --git a/core/java/android/speech/tts/TextToSpeech.java b/core/java/android/speech/tts/TextToSpeech.java index 95830ec..2add7b5 100755 --- a/core/java/android/speech/tts/TextToSpeech.java +++ b/core/java/android/speech/tts/TextToSpeech.java @@ -1,5 +1,5 @@ /* - * Copyright (C) 2009 Google Inc. + * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of @@ -15,22 +15,31 @@ */ package android.speech.tts; -import android.speech.tts.ITts; -import android.speech.tts.ITtsCallback; - import android.annotation.SdkConstant; import android.annotation.SdkConstant.SdkConstantType; import android.content.ComponentName; +import android.content.ContentResolver; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; +import android.content.pm.PackageManager; +import android.content.pm.ResolveInfo; +import android.content.pm.ServiceInfo; import android.media.AudioManager; +import android.net.Uri; +import android.os.Bundle; import android.os.IBinder; import android.os.RemoteException; +import android.provider.Settings; +import android.text.TextUtils; import android.util.Log; +import java.util.ArrayList; +import java.util.Collections; import java.util.HashMap; +import java.util.List; import java.util.Locale; +import java.util.Map; /** * @@ -49,11 +58,11 @@ public class TextToSpeech { /** * Denotes a successful operation. */ - public static final int SUCCESS = 0; + public static final int SUCCESS = 0; /** * Denotes a generic operation failure. */ - public static final int ERROR = -1; + public static final int ERROR = -1; /** * Queue mode where all entries in the playback queue (media to be played @@ -65,20 +74,17 @@ public class TextToSpeech { */ public static final int QUEUE_ADD = 1; - /** * Denotes the language is available exactly as specified by the locale. */ public static final int LANG_COUNTRY_VAR_AVAILABLE = 2; - /** * Denotes the language is available for the language and country specified * by the locale, but not the variant. */ public static final int LANG_COUNTRY_AVAILABLE = 1; - /** * Denotes the language is available for the language by the locale, * but not the country and variant. @@ -95,7 +101,6 @@ public class TextToSpeech { */ public static final int LANG_NOT_SUPPORTED = -2; - /** * Broadcast Action: The TextToSpeech synthesizer has completed processing * of all the text in the speech queue. @@ -104,7 +109,6 @@ public class TextToSpeech { public static final String ACTION_TTS_QUEUE_PROCESSING_COMPLETED = "android.speech.tts.TTS_QUEUE_PROCESSING_COMPLETED"; - /** * Interface definition of a callback to be invoked indicating the completion of the * TextToSpeech engine initialization. @@ -112,103 +116,117 @@ public class TextToSpeech { public interface OnInitListener { /** * Called to signal the completion of the TextToSpeech engine initialization. + * * @param status {@link TextToSpeech#SUCCESS} or {@link TextToSpeech#ERROR}. */ public void onInit(int status); } /** - * Interface definition of a callback to be invoked indicating the TextToSpeech engine has - * completed synthesizing an utterance with an utterance ID set. - * + * Listener that will be called when the TTS service has + * completed synthesizing an utterance. This is only called if the utterance + * has an utterance ID (see {@link TextToSpeech.Engine#KEY_PARAM_UTTERANCE_ID}). */ public interface OnUtteranceCompletedListener { /** - * Called to signal the completion of the synthesis of the utterance that was identified - * with the string parameter. This identifier is the one originally passed in the - * parameter hashmap of the synthesis request in - * {@link TextToSpeech#speak(String, int, HashMap)} or - * {@link TextToSpeech#synthesizeToFile(String, HashMap, String)} with the - * {@link TextToSpeech.Engine#KEY_PARAM_UTTERANCE_ID} key. + * Called when an utterance has been synthesized. + * * @param utteranceId the identifier of the utterance. */ public void onUtteranceCompleted(String utteranceId); } - /** - * Internal constants for the TextToSpeech functionality - * + * Constants and parameter names for controlling text-to-speech. */ public class Engine { - // default values for a TTS engine when settings are not found in the provider + /** - * {@hide} + * Default speech rate. + * @hide */ - public static final int DEFAULT_RATE = 100; // 1x + public static final int DEFAULT_RATE = 100; + /** - * {@hide} + * Default pitch. + * @hide */ - public static final int DEFAULT_PITCH = 100;// 1x + public static final int DEFAULT_PITCH = 100; + /** - * {@hide} + * Default volume. + * @hide */ public static final float DEFAULT_VOLUME = 1.0f; + /** - * {@hide} - */ - protected static final String DEFAULT_VOLUME_STRING = "1.0"; - /** - * {@hide} + * Default pan (centered). + * @hide */ public static final float DEFAULT_PAN = 0.0f; - /** - * {@hide} - */ - protected static final String DEFAULT_PAN_STRING = "0.0"; /** - * {@hide} + * Default value for {@link Settings.Secure#TTS_USE_DEFAULTS}. + * @hide */ public static final int USE_DEFAULTS = 0; // false + /** - * {@hide} + * Package name of the default TTS engine. + * + * TODO: This should come from a system property + * + * @hide */ - public static final String DEFAULT_SYNTH = "com.svox.pico"; + public static final String DEFAULT_ENGINE = "com.svox.pico"; - // default values for rendering /** * Default audio stream used when playing synthesized speech. */ public static final int DEFAULT_STREAM = AudioManager.STREAM_MUSIC; - // return codes for a TTS engine's check data activity /** * Indicates success when checking the installation status of the resources used by the * TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent. */ public static final int CHECK_VOICE_DATA_PASS = 1; + /** * Indicates failure when checking the installation status of the resources used by the * TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent. */ public static final int CHECK_VOICE_DATA_FAIL = 0; + /** * Indicates erroneous data when checking the installation status of the resources used by * the TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent. */ public static final int CHECK_VOICE_DATA_BAD_DATA = -1; + /** * Indicates missing resources when checking the installation status of the resources used * by the TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent. */ public static final int CHECK_VOICE_DATA_MISSING_DATA = -2; + /** * Indicates missing storage volume when checking the installation status of the resources * used by the TextToSpeech engine with the {@link #ACTION_CHECK_TTS_DATA} intent. */ public static final int CHECK_VOICE_DATA_MISSING_VOLUME = -3; + /** + * Intent for starting a TTS service. Services that handle this intent must + * extend {@link TextToSpeechService}. Normal applications should not use this intent + * directly, instead they should talk to the TTS service using the the methods in this + * class. + * + * @hide Pending API council approval + */ + @SdkConstant(SdkConstantType.SERVICE_ACTION) + public static final String INTENT_ACTION_TTS_SERVICE = + "android.intent.action.TTS_SERVICE"; + // intents to ask engine to install data or check its data /** * Activity Action: Triggers the platform TextToSpeech engine to @@ -231,6 +249,7 @@ public class TextToSpeech { @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION) public static final String ACTION_TTS_DATA_INSTALLED = "android.speech.tts.engine.TTS_DATA_INSTALLED"; + /** * Activity Action: Starts the activity from the platform TextToSpeech * engine to verify the proper installation and availability of the @@ -258,23 +277,36 @@ public class TextToSpeech { public static final String ACTION_CHECK_TTS_DATA = "android.speech.tts.engine.CHECK_TTS_DATA"; + /** + * Activity intent for getting some sample text to use for demonstrating TTS. + * + * @hide This intent was used by engines written against the old API. + * Not sure if it should be exposed. + */ + @SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION) + public static final String ACTION_GET_SAMPLE_TEXT = + "android.speech.tts.engine.GET_SAMPLE_TEXT"; + // extras for a TTS engine's check data activity /** * Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent where * the TextToSpeech engine specifies the path to its resources. */ public static final String EXTRA_VOICE_DATA_ROOT_DIRECTORY = "dataRoot"; + /** * Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent where * the TextToSpeech engine specifies the file names of its resources under the * resource path. */ public static final String EXTRA_VOICE_DATA_FILES = "dataFiles"; + /** * Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent where * the TextToSpeech engine specifies the locale associated with each resource file. */ public static final String EXTRA_VOICE_DATA_FILES_INFO = "dataFilesInfo"; + /** * Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent where * the TextToSpeech engine returns an ArrayList<String> of all the available voices. @@ -282,6 +314,7 @@ public class TextToSpeech { * optional (ie, "eng" or "eng-USA" or "eng-USA-FEMALE"). */ public static final String EXTRA_AVAILABLE_VOICES = "availableVoices"; + /** * Extra information received with the {@link #ACTION_CHECK_TTS_DATA} intent where * the TextToSpeech engine returns an ArrayList<String> of all the unavailable voices. @@ -289,6 +322,7 @@ public class TextToSpeech { * optional (ie, "eng" or "eng-USA" or "eng-USA-FEMALE"). */ public static final String EXTRA_UNAVAILABLE_VOICES = "unavailableVoices"; + /** * Extra information sent with the {@link #ACTION_CHECK_TTS_DATA} intent where the * caller indicates to the TextToSpeech engine which specific sets of voice data to @@ -311,134 +345,87 @@ public class TextToSpeech { // keys for the parameters passed with speak commands. Hidden keys are used internally // to maintain engine state for each TextToSpeech instance. /** - * {@hide} + * @hide */ public static final String KEY_PARAM_RATE = "rate"; + /** - * {@hide} + * @hide */ public static final String KEY_PARAM_LANGUAGE = "language"; + /** - * {@hide} + * @hide */ public static final String KEY_PARAM_COUNTRY = "country"; + /** - * {@hide} + * @hide */ public static final String KEY_PARAM_VARIANT = "variant"; + /** - * {@hide} + * @hide */ public static final String KEY_PARAM_ENGINE = "engine"; + /** - * {@hide} + * @hide */ public static final String KEY_PARAM_PITCH = "pitch"; + /** * Parameter key to specify the audio stream type to be used when speaking text - * or playing back a file. + * or playing back a file. The value should be one of the STREAM_ constants + * defined in {@link AudioManager}. + * * @see TextToSpeech#speak(String, int, HashMap) * @see TextToSpeech#playEarcon(String, int, HashMap) */ public static final String KEY_PARAM_STREAM = "streamType"; + /** * Parameter key to identify an utterance in the * {@link TextToSpeech.OnUtteranceCompletedListener} after text has been * spoken, a file has been played back or a silence duration has elapsed. + * * @see TextToSpeech#speak(String, int, HashMap) * @see TextToSpeech#playEarcon(String, int, HashMap) * @see TextToSpeech#synthesizeToFile(String, HashMap, String) */ public static final String KEY_PARAM_UTTERANCE_ID = "utteranceId"; + /** * Parameter key to specify the speech volume relative to the current stream type * volume used when speaking text. Volume is specified as a float ranging from 0 to 1 * where 0 is silence, and 1 is the maximum volume (the default behavior). + * * @see TextToSpeech#speak(String, int, HashMap) * @see TextToSpeech#playEarcon(String, int, HashMap) */ public static final String KEY_PARAM_VOLUME = "volume"; + /** * Parameter key to specify how the speech is panned from left to right when speaking text. * Pan is specified as a float ranging from -1 to +1 where -1 maps to a hard-left pan, * 0 to center (the default behavior), and +1 to hard-right. + * * @see TextToSpeech#speak(String, int, HashMap) * @see TextToSpeech#playEarcon(String, int, HashMap) */ public static final String KEY_PARAM_PAN = "pan"; - // key positions in the array of cached parameters - /** - * {@hide} - */ - protected static final int PARAM_POSITION_RATE = 0; - /** - * {@hide} - */ - protected static final int PARAM_POSITION_LANGUAGE = 2; - /** - * {@hide} - */ - protected static final int PARAM_POSITION_COUNTRY = 4; - /** - * {@hide} - */ - protected static final int PARAM_POSITION_VARIANT = 6; - /** - * {@hide} - */ - protected static final int PARAM_POSITION_STREAM = 8; - /** - * {@hide} - */ - protected static final int PARAM_POSITION_UTTERANCE_ID = 10; - - /** - * {@hide} - */ - protected static final int PARAM_POSITION_ENGINE = 12; - - /** - * {@hide} - */ - protected static final int PARAM_POSITION_PITCH = 14; - - /** - * {@hide} - */ - protected static final int PARAM_POSITION_VOLUME = 16; - - /** - * {@hide} - */ - protected static final int PARAM_POSITION_PAN = 18; - - - /** - * {@hide} - * Total number of cached speech parameters. - * This number should be equal to (max param position/2) + 1. - */ - protected static final int NB_CACHED_PARAMS = 10; } - /** - * Connection needed for the TTS. - */ - private ServiceConnection mServiceConnection; - - private ITts mITts = null; - private ITtsCallback mITtscallback = null; - private Context mContext = null; - private String mPackageName = ""; - private OnInitListener mInitListener = null; - private boolean mStarted = false; + private final Context mContext; + private Connection mServiceConnection; + private OnInitListener mInitListener; private final Object mStartLock = new Object(); - /** - * Used to store the cached parameters sent along with each synthesis request to the - * TTS service. - */ - private String[] mCachedParams; + + private String mRequestedEngine; + private final Map<String, Uri> mEarcons; + private final Map<String, Uri> mUtterances; + private final Bundle mParams = new Bundle(); /** * The constructor for the TextToSpeech class. @@ -451,84 +438,98 @@ public class TextToSpeech { * TextToSpeech engine has initialized. */ public TextToSpeech(Context context, OnInitListener listener) { + this(context, listener, null); + } + + /** + * @hide pending approval + */ + public TextToSpeech(Context context, OnInitListener listener, String engine) { mContext = context; - mPackageName = mContext.getPackageName(); mInitListener = listener; + mRequestedEngine = engine; - mCachedParams = new String[2*Engine.NB_CACHED_PARAMS]; // store key and value - mCachedParams[Engine.PARAM_POSITION_RATE] = Engine.KEY_PARAM_RATE; - mCachedParams[Engine.PARAM_POSITION_LANGUAGE] = Engine.KEY_PARAM_LANGUAGE; - mCachedParams[Engine.PARAM_POSITION_COUNTRY] = Engine.KEY_PARAM_COUNTRY; - mCachedParams[Engine.PARAM_POSITION_VARIANT] = Engine.KEY_PARAM_VARIANT; - mCachedParams[Engine.PARAM_POSITION_STREAM] = Engine.KEY_PARAM_STREAM; - mCachedParams[Engine.PARAM_POSITION_UTTERANCE_ID] = Engine.KEY_PARAM_UTTERANCE_ID; - mCachedParams[Engine.PARAM_POSITION_ENGINE] = Engine.KEY_PARAM_ENGINE; - mCachedParams[Engine.PARAM_POSITION_PITCH] = Engine.KEY_PARAM_PITCH; - mCachedParams[Engine.PARAM_POSITION_VOLUME] = Engine.KEY_PARAM_VOLUME; - mCachedParams[Engine.PARAM_POSITION_PAN] = Engine.KEY_PARAM_PAN; - - // Leave all defaults that are shown in Settings uninitialized/at the default - // so that the values set in Settings will take effect if the application does - // not try to change these settings itself. - mCachedParams[Engine.PARAM_POSITION_RATE + 1] = ""; - mCachedParams[Engine.PARAM_POSITION_LANGUAGE + 1] = ""; - mCachedParams[Engine.PARAM_POSITION_COUNTRY + 1] = ""; - mCachedParams[Engine.PARAM_POSITION_VARIANT + 1] = ""; - mCachedParams[Engine.PARAM_POSITION_STREAM + 1] = - String.valueOf(Engine.DEFAULT_STREAM); - mCachedParams[Engine.PARAM_POSITION_UTTERANCE_ID + 1] = ""; - mCachedParams[Engine.PARAM_POSITION_ENGINE + 1] = ""; - mCachedParams[Engine.PARAM_POSITION_PITCH + 1] = "100"; - mCachedParams[Engine.PARAM_POSITION_VOLUME + 1] = Engine.DEFAULT_VOLUME_STRING; - mCachedParams[Engine.PARAM_POSITION_PAN + 1] = Engine.DEFAULT_PAN_STRING; + mEarcons = new HashMap<String, Uri>(); + mUtterances = new HashMap<String, Uri>(); initTts(); } + private String getPackageName() { + return mContext.getPackageName(); + } - private void initTts() { - mStarted = false; - - // Initialize the TTS, run the callback after the binding is successful - mServiceConnection = new ServiceConnection() { - public void onServiceConnected(ComponentName name, IBinder service) { - synchronized(mStartLock) { - mITts = ITts.Stub.asInterface(service); - mStarted = true; - // Cache the default engine and current language - setEngineByPackageName(getDefaultEngine()); - setLanguage(getLanguage()); - if (mInitListener != null) { - // TODO manage failures and missing resources - mInitListener.onInit(SUCCESS); - } - } + private <R> R runActionNoReconnect(Action<R> action, R errorResult, String method) { + return runAction(action, errorResult, method, false); + } + + private <R> R runAction(Action<R> action, R errorResult, String method) { + return runAction(action, errorResult, method, true); + } + + private <R> R runAction(Action<R> action, R errorResult, String method, boolean reconnect) { + synchronized (mStartLock) { + if (mServiceConnection == null) { + Log.w(TAG, method + " failed: not bound to TTS engine"); + return errorResult; } + return mServiceConnection.runAction(action, errorResult, method, reconnect); + } + } - public void onServiceDisconnected(ComponentName name) { - synchronized(mStartLock) { - mITts = null; - mInitListener = null; - mStarted = false; - } + private int initTts() { + String defaultEngine = getDefaultEngine(); + String engine = defaultEngine; + if (!areDefaultsEnforced() && !TextUtils.isEmpty(mRequestedEngine) + && isEngineEnabled(engine)) { + engine = mRequestedEngine; + } + + // Try requested engine + if (connectToEngine(engine)) { + return SUCCESS; + } + + // Fall back to user's default engine if different from the already tested one + if (!engine.equals(defaultEngine)) { + if (connectToEngine(defaultEngine)) { + return SUCCESS; } - }; + } - Intent intent = new Intent("android.intent.action.START_TTS_SERVICE"); - intent.addCategory("android.intent.category.TTS"); - boolean bound = mContext.bindService(intent, mServiceConnection, Context.BIND_AUTO_CREATE); - if (!bound) { - Log.e("TextToSpeech.java", "initTts() failed to bind to service"); - if (mInitListener != null) { - mInitListener.onInit(ERROR); + // Fall back to the hardcoded default if different from the two above + if (!defaultEngine.equals(Engine.DEFAULT_ENGINE) + && !engine.equals(Engine.DEFAULT_ENGINE)) { + if (connectToEngine(Engine.DEFAULT_ENGINE)) { + return SUCCESS; } + } + + return ERROR; + } + + private boolean connectToEngine(String engine) { + Connection connection = new Connection(); + Intent intent = new Intent(Engine.INTENT_ACTION_TTS_SERVICE); + intent.setPackage(engine); + boolean bound = mContext.bindService(intent, connection, Context.BIND_AUTO_CREATE); + if (!bound) { + Log.e(TAG, "Failed to bind to " + engine); + dispatchOnInit(ERROR); + return false; } else { - // initialization listener will be called inside ServiceConnection - Log.i("TextToSpeech.java", "initTts() successfully bound to service"); + return true; } - // TODO handle plugin failures } + private void dispatchOnInit(int result) { + synchronized (mStartLock) { + if (mInitListener != null) { + mInitListener.onInit(result); + mInitListener = null; + } + } + } /** * Releases the resources used by the TextToSpeech engine. @@ -536,15 +537,17 @@ public class TextToSpeech { * so the TextToSpeech engine can be cleanly stopped. */ public void shutdown() { - try { - mContext.unbindService(mServiceConnection); - } catch (IllegalArgumentException e) { - // Do nothing and fail silently since an error here indicates that - // binding never succeeded in the first place. - } + runActionNoReconnect(new Action<Void>() { + @Override + public Void run(ITextToSpeechService service) throws RemoteException { + service.setCallback(getPackageName(), null); + service.stop(getPackageName()); + mServiceConnection.disconnect(); + return null; + } + }, null, "shutdown"); } - /** * Adds a mapping between a string of text and a sound resource in a * package. After a call to this method, subsequent calls to @@ -573,21 +576,9 @@ public class TextToSpeech { * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. */ public int addSpeech(String text, String packagename, int resourceId) { - synchronized(mStartLock) { - if (!mStarted) { - return ERROR; - } - try { - mITts.addSpeech(mPackageName, text, packagename, resourceId); - return SUCCESS; - } catch (RemoteException e) { - restart("addSpeech", e); - } catch (NullPointerException e) { - restart("addSpeech", e); - } catch (IllegalStateException e) { - restart("addSpeech", e); - } - return ERROR; + synchronized (mStartLock) { + mUtterances.put(text, makeResourceUri(packagename, resourceId)); + return SUCCESS; } } @@ -608,20 +599,8 @@ public class TextToSpeech { */ public int addSpeech(String text, String filename) { synchronized (mStartLock) { - if (!mStarted) { - return ERROR; - } - try { - mITts.addSpeechFile(mPackageName, text, filename); - return SUCCESS; - } catch (RemoteException e) { - restart("addSpeech", e); - } catch (NullPointerException e) { - restart("addSpeech", e); - } catch (IllegalStateException e) { - restart("addSpeech", e); - } - return ERROR; + mUtterances.put(text, Uri.parse(filename)); + return SUCCESS; } } @@ -653,24 +632,11 @@ public class TextToSpeech { */ public int addEarcon(String earcon, String packagename, int resourceId) { synchronized(mStartLock) { - if (!mStarted) { - return ERROR; - } - try { - mITts.addEarcon(mPackageName, earcon, packagename, resourceId); - return SUCCESS; - } catch (RemoteException e) { - restart("addEarcon", e); - } catch (NullPointerException e) { - restart("addEarcon", e); - } catch (IllegalStateException e) { - restart("addEarcon", e); - } - return ERROR; + mEarcons.put(earcon, makeResourceUri(packagename, resourceId)); + return SUCCESS; } } - /** * Adds a mapping between a string of text and a sound file. * Use this to add custom earcons. @@ -687,312 +653,199 @@ public class TextToSpeech { * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. */ public int addEarcon(String earcon, String filename) { - synchronized (mStartLock) { - if (!mStarted) { - return ERROR; - } - try { - mITts.addEarconFile(mPackageName, earcon, filename); - return SUCCESS; - } catch (RemoteException e) { - restart("addEarcon", e); - } catch (NullPointerException e) { - restart("addEarcon", e); - } catch (IllegalStateException e) { - restart("addEarcon", e); - } - return ERROR; + synchronized(mStartLock) { + mEarcons.put(earcon, Uri.parse(filename)); + return SUCCESS; } } + private Uri makeResourceUri(String packageName, int resourceId) { + return new Uri.Builder() + .scheme(ContentResolver.SCHEME_ANDROID_RESOURCE) + .encodedAuthority(packageName) + .appendEncodedPath(String.valueOf(resourceId)) + .build(); + } /** * Speaks the string using the specified queuing strategy and speech * parameters. * - * @param text - * The string of text to be spoken. - * @param queueMode - * The queuing strategy to use. - * {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}. - * @param params - * The list of parameters to be used. Can be null if no parameters are given. - * They are specified using a (key, value) pair, where the key can be - * {@link Engine#KEY_PARAM_STREAM} or - * {@link Engine#KEY_PARAM_UTTERANCE_ID}. + * @param text The string of text to be spoken. + * @param queueMode The queuing strategy to use, {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}. + * @param params Parameters for the request. Can be null. + * Supported parameter names: + * {@link Engine#KEY_PARAM_STREAM}, + * {@link Engine#KEY_PARAM_UTTERANCE_ID}, + * {@link Engine#KEY_PARAM_VOLUME}, + * {@link Engine#KEY_PARAM_PAN}. * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ - public int speak(String text, int queueMode, HashMap<String,String> params) - { - synchronized (mStartLock) { - int result = ERROR; - Log.i("TextToSpeech.java - speak", "speak text of length " + text.length()); - if (!mStarted) { - Log.e("TextToSpeech.java - speak", "service isn't started"); - return result; - } - try { - if ((params != null) && (!params.isEmpty())) { - setCachedParam(params, Engine.KEY_PARAM_STREAM, Engine.PARAM_POSITION_STREAM); - setCachedParam(params, Engine.KEY_PARAM_UTTERANCE_ID, - Engine.PARAM_POSITION_UTTERANCE_ID); - setCachedParam(params, Engine.KEY_PARAM_ENGINE, Engine.PARAM_POSITION_ENGINE); - setCachedParam(params, Engine.KEY_PARAM_VOLUME, Engine.PARAM_POSITION_VOLUME); - setCachedParam(params, Engine.KEY_PARAM_PAN, Engine.PARAM_POSITION_PAN); + public int speak(final String text, final int queueMode, final HashMap<String, String> params) { + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + Uri utteranceUri = mUtterances.get(text); + if (utteranceUri != null) { + return service.playAudio(getPackageName(), utteranceUri, queueMode, + getParams(params)); + } else { + return service.speak(getPackageName(), text, queueMode, getParams(params)); } - result = mITts.speak(mPackageName, text, queueMode, mCachedParams); - } catch (RemoteException e) { - restart("speak", e); - } catch (NullPointerException e) { - restart("speak", e); - } catch (IllegalStateException e) { - restart("speak", e); - } finally { - resetCachedParams(); } - return result; - } + }, ERROR, "speak"); } - /** * Plays the earcon using the specified queueing mode and parameters. + * The earcon must already have been added with {@link #addEarcon(String, String)} or + * {@link #addEarcon(String, String, int)}. * - * @param earcon - * The earcon that should be played - * @param queueMode - * {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}. - * @param params - * The list of parameters to be used. Can be null if no parameters are given. - * They are specified using a (key, value) pair, where the key can be - * {@link Engine#KEY_PARAM_STREAM} or + * @param earcon The earcon that should be played + * @param queueMode {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}. + * @param params Parameters for the request. Can be null. + * Supported parameter names: + * {@link Engine#KEY_PARAM_STREAM}, * {@link Engine#KEY_PARAM_UTTERANCE_ID}. * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ - public int playEarcon(String earcon, int queueMode, - HashMap<String,String> params) { - synchronized (mStartLock) { - int result = ERROR; - if (!mStarted) { - return result; - } - try { - if ((params != null) && (!params.isEmpty())) { - String extra = params.get(Engine.KEY_PARAM_STREAM); - if (extra != null) { - mCachedParams[Engine.PARAM_POSITION_STREAM + 1] = extra; - } - setCachedParam(params, Engine.KEY_PARAM_STREAM, Engine.PARAM_POSITION_STREAM); - setCachedParam(params, Engine.KEY_PARAM_UTTERANCE_ID, - Engine.PARAM_POSITION_UTTERANCE_ID); + public int playEarcon(final String earcon, final int queueMode, + final HashMap<String, String> params) { + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + Uri earconUri = mEarcons.get(earcon); + if (earconUri == null) { + return ERROR; } - result = mITts.playEarcon(mPackageName, earcon, queueMode, null); - } catch (RemoteException e) { - restart("playEarcon", e); - } catch (NullPointerException e) { - restart("playEarcon", e); - } catch (IllegalStateException e) { - restart("playEarcon", e); - } finally { - resetCachedParams(); + return service.playAudio(getPackageName(), earconUri, queueMode, + getParams(params)); } - return result; - } + }, ERROR, "playEarcon"); } /** * Plays silence for the specified amount of time using the specified * queue mode. * - * @param durationInMs - * A long that indicates how long the silence should last. - * @param queueMode - * {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}. - * @param params - * The list of parameters to be used. Can be null if no parameters are given. - * They are specified using a (key, value) pair, where the key can be + * @param durationInMs The duration of the silence. + * @param queueMode {@link #QUEUE_ADD} or {@link #QUEUE_FLUSH}. + * @param params Parameters for the request. Can be null. + * Supported parameter names: * {@link Engine#KEY_PARAM_UTTERANCE_ID}. * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ - public int playSilence(long durationInMs, int queueMode, HashMap<String,String> params) { - synchronized (mStartLock) { - int result = ERROR; - if (!mStarted) { - return result; - } - try { - if ((params != null) && (!params.isEmpty())) { - setCachedParam(params, Engine.KEY_PARAM_UTTERANCE_ID, - Engine.PARAM_POSITION_UTTERANCE_ID); - } - result = mITts.playSilence(mPackageName, durationInMs, queueMode, mCachedParams); - } catch (RemoteException e) { - restart("playSilence", e); - } catch (NullPointerException e) { - restart("playSilence", e); - } catch (IllegalStateException e) { - restart("playSilence", e); - } finally { - resetCachedParams(); + public int playSilence(final long durationInMs, final int queueMode, + final HashMap<String, String> params) { + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + return service.playSilence(getPackageName(), durationInMs, queueMode, + getParams(params)); } - return result; - } + }, ERROR, "playSilence"); } - /** - * Returns whether or not the TextToSpeech engine is busy speaking. + * Checks whether the TTS engine is busy speaking. * - * @return Whether or not the TextToSpeech engine is busy speaking. + * @return {@code true} if the TTS engine is speaking. */ public boolean isSpeaking() { - synchronized (mStartLock) { - if (!mStarted) { - return false; - } - try { - return mITts.isSpeaking(); - } catch (RemoteException e) { - restart("isSpeaking", e); - } catch (NullPointerException e) { - restart("isSpeaking", e); - } catch (IllegalStateException e) { - restart("isSpeaking", e); + return runAction(new Action<Boolean>() { + @Override + public Boolean run(ITextToSpeechService service) throws RemoteException { + return service.isSpeaking(); } - return false; - } + }, false, "isSpeaking"); } - /** * Interrupts the current utterance (whether played or rendered to file) and discards other * utterances in the queue. * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ public int stop() { - synchronized (mStartLock) { - int result = ERROR; - if (!mStarted) { - return result; + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + return service.stop(getPackageName()); } - try { - result = mITts.stop(mPackageName); - } catch (RemoteException e) { - restart("stop", e); - } catch (NullPointerException e) { - restart("stop", e); - } catch (IllegalStateException e) { - restart("stop", e); - } - return result; - } + }, ERROR, "stop"); } - /** - * Sets the speech rate for the TextToSpeech engine. + * Sets the speech rate. * * This has no effect on any pre-recorded speech. * - * @param speechRate - * The speech rate for the TextToSpeech engine. 1 is the normal speed, - * lower values slow down the speech (0.5 is half the normal speech rate), - * greater values accelerate it (2 is twice the normal speech rate). + * @param speechRate Speech rate. {@code 1.0} is the normal speech rate, + * lower values slow down the speech ({@code 0.5} is half the normal speech rate), + * greater values accelerate it ({@code 2.0} is twice the normal speech rate). * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ public int setSpeechRate(float speechRate) { - synchronized (mStartLock) { - int result = ERROR; - if (!mStarted) { - return result; - } - try { - if (speechRate > 0) { - int rate = (int)(speechRate*100); - mCachedParams[Engine.PARAM_POSITION_RATE + 1] = String.valueOf(rate); - // the rate is not set here, instead it is cached so it will be associated - // with all upcoming utterances. - if (speechRate > 0.0f) { - result = SUCCESS; - } else { - result = ERROR; - } + if (speechRate > 0.0f) { + int intRate = (int)(speechRate * 100); + if (intRate > 0) { + synchronized (mStartLock) { + mParams.putInt(Engine.KEY_PARAM_RATE, intRate); } - } catch (NullPointerException e) { - restart("setSpeechRate", e); - } catch (IllegalStateException e) { - restart("setSpeechRate", e); + return SUCCESS; } - return result; } + return ERROR; } - /** * Sets the speech pitch for the TextToSpeech engine. * * This has no effect on any pre-recorded speech. * - * @param pitch - * The pitch for the TextToSpeech engine. 1 is the normal pitch, + * @param pitch Speech pitch. {@code 1.0} is the normal pitch, * lower values lower the tone of the synthesized voice, * greater values increase it. * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ public int setPitch(float pitch) { - synchronized (mStartLock) { - int result = ERROR; - if (!mStarted) { - return result; - } - try { - // the pitch is not set here, instead it is cached so it will be associated - // with all upcoming utterances. - if (pitch > 0) { - int p = (int)(pitch*100); - mCachedParams[Engine.PARAM_POSITION_PITCH + 1] = String.valueOf(p); - result = SUCCESS; + if (pitch > 0.0f) { + int intPitch = (int)(pitch * 100); + if (intPitch > 0) { + synchronized (mStartLock) { + mParams.putInt(Engine.KEY_PARAM_PITCH, intPitch); } - } catch (NullPointerException e) { - restart("setPitch", e); - } catch (IllegalStateException e) { - restart("setPitch", e); + return SUCCESS; } - return result; } + return ERROR; } - /** - * Sets the language for the TextToSpeech engine. - * The TextToSpeech engine will try to use the closest match to the specified + * Sets the text-to-speech language. + * The TTS engine will try to use the closest match to the specified * language as represented by the Locale, but there is no guarantee that the exact same Locale * will be used. Use {@link #isLanguageAvailable(Locale)} to check the level of support * before choosing the language to use for the next utterances. * - * @param loc - * The locale describing the language to be used. + * @param loc The locale describing the language to be used. * - * @return code indicating the support status for the locale. See {@link #LANG_AVAILABLE}, + * @return Code indicating the support status for the locale. See {@link #LANG_AVAILABLE}, * {@link #LANG_COUNTRY_AVAILABLE}, {@link #LANG_COUNTRY_VAR_AVAILABLE}, * {@link #LANG_MISSING_DATA} and {@link #LANG_NOT_SUPPORTED}. */ - public int setLanguage(Locale loc) { - synchronized (mStartLock) { - int result = LANG_NOT_SUPPORTED; - if (!mStarted) { - return result; - } - if (loc == null) { - return result; - } - try { + public int setLanguage(final Locale loc) { + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + if (loc == null) { + return LANG_NOT_SUPPORTED; + } String language = loc.getISO3Language(); String country = loc.getISO3Country(); String variant = loc.getVariant(); @@ -1000,294 +853,316 @@ public class TextToSpeech { // the available parts. // Note that the language is not actually set here, instead it is cached so it // will be associated with all upcoming utterances. - result = mITts.isLanguageAvailable(language, country, variant, mCachedParams); + int result = service.loadLanguage(language, country, variant); if (result >= LANG_AVAILABLE){ - mCachedParams[Engine.PARAM_POSITION_LANGUAGE + 1] = language; - if (result >= LANG_COUNTRY_AVAILABLE){ - mCachedParams[Engine.PARAM_POSITION_COUNTRY + 1] = country; - } else { - mCachedParams[Engine.PARAM_POSITION_COUNTRY + 1] = ""; - } - if (result >= LANG_COUNTRY_VAR_AVAILABLE){ - mCachedParams[Engine.PARAM_POSITION_VARIANT + 1] = variant; - } else { - mCachedParams[Engine.PARAM_POSITION_VARIANT + 1] = ""; + if (result < LANG_COUNTRY_VAR_AVAILABLE) { + variant = ""; + if (result < LANG_COUNTRY_AVAILABLE) { + country = ""; + } } + mParams.putString(Engine.KEY_PARAM_LANGUAGE, language); + mParams.putString(Engine.KEY_PARAM_COUNTRY, country); + mParams.putString(Engine.KEY_PARAM_VARIANT, variant); } - } catch (RemoteException e) { - restart("setLanguage", e); - } catch (NullPointerException e) { - restart("setLanguage", e); - } catch (IllegalStateException e) { - restart("setLanguage", e); + return result; } - return result; - } + }, LANG_NOT_SUPPORTED, "setLanguage"); } - /** * Returns a Locale instance describing the language currently being used by the TextToSpeech * engine. + * * @return language, country (if any) and variant (if any) used by the engine stored in a Locale - * instance, or null is the TextToSpeech engine has failed. + * instance, or {@code null} on error. */ public Locale getLanguage() { - synchronized (mStartLock) { - if (!mStarted) { - return null; - } - try { - // Only do a call to the native synth if there is nothing in the cached params - if (mCachedParams[Engine.PARAM_POSITION_LANGUAGE + 1].length() < 1){ - String[] locStrings = mITts.getLanguage(); - if ((locStrings != null) && (locStrings.length == 3)) { - return new Locale(locStrings[0], locStrings[1], locStrings[2]); - } else { - return null; - } - } else { - return new Locale(mCachedParams[Engine.PARAM_POSITION_LANGUAGE + 1], - mCachedParams[Engine.PARAM_POSITION_COUNTRY + 1], - mCachedParams[Engine.PARAM_POSITION_VARIANT + 1]); + return runAction(new Action<Locale>() { + @Override + public Locale run(ITextToSpeechService service) throws RemoteException { + String[] locStrings = service.getLanguage(); + if (locStrings != null && locStrings.length == 3) { + return new Locale(locStrings[0], locStrings[1], locStrings[2]); } - } catch (RemoteException e) { - restart("getLanguage", e); - } catch (NullPointerException e) { - restart("getLanguage", e); - } catch (IllegalStateException e) { - restart("getLanguage", e); + return null; } - return null; - } + }, null, "getLanguage"); } /** * Checks if the specified language as represented by the Locale is available and supported. * - * @param loc - * The Locale describing the language to be used. + * @param loc The Locale describing the language to be used. * - * @return code indicating the support status for the locale. See {@link #LANG_AVAILABLE}, + * @return Code indicating the support status for the locale. See {@link #LANG_AVAILABLE}, * {@link #LANG_COUNTRY_AVAILABLE}, {@link #LANG_COUNTRY_VAR_AVAILABLE}, * {@link #LANG_MISSING_DATA} and {@link #LANG_NOT_SUPPORTED}. */ - public int isLanguageAvailable(Locale loc) { - synchronized (mStartLock) { - int result = LANG_NOT_SUPPORTED; - if (!mStarted) { - return result; + public int isLanguageAvailable(final Locale loc) { + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + return service.isLanguageAvailable(loc.getISO3Language(), + loc.getISO3Country(), loc.getVariant()); } - try { - result = mITts.isLanguageAvailable(loc.getISO3Language(), - loc.getISO3Country(), loc.getVariant(), mCachedParams); - } catch (RemoteException e) { - restart("isLanguageAvailable", e); - } catch (NullPointerException e) { - restart("isLanguageAvailable", e); - } catch (IllegalStateException e) { - restart("isLanguageAvailable", e); - } - return result; - } + }, LANG_NOT_SUPPORTED, "isLanguageAvailable"); } - /** * Synthesizes the given text to a file using the specified parameters. * - * @param text - * The String of text that should be synthesized - * @param params - * The list of parameters to be used. Can be null if no parameters are given. - * They are specified using a (key, value) pair, where the key can be + * @param text Thetext that should be synthesized + * @param params Parameters for the request. Can be null. + * Supported parameter names: * {@link Engine#KEY_PARAM_UTTERANCE_ID}. - * @param filename - * The string that gives the full output filename; it should be + * @param filename Absolute file filename to write the generated audio data to.It should be * something like "/sdcard/myappsounds/mysound.wav". * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ - public int synthesizeToFile(String text, HashMap<String,String> params, - String filename) { - Log.i("TextToSpeech.java", "synthesizeToFile()"); - synchronized (mStartLock) { - int result = ERROR; - Log.i("TextToSpeech.java - synthesizeToFile", "synthesizeToFile text of length " - + text.length()); - if (!mStarted) { - Log.e("TextToSpeech.java - synthesizeToFile", "service isn't started"); - return result; + public int synthesizeToFile(final String text, final HashMap<String, String> params, + final String filename) { + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + return service.synthesizeToFile(getPackageName(), text, filename, + getParams(params)); } - try { - if ((params != null) && (!params.isEmpty())) { - // no need to read the stream type here - setCachedParam(params, Engine.KEY_PARAM_UTTERANCE_ID, - Engine.PARAM_POSITION_UTTERANCE_ID); - setCachedParam(params, Engine.KEY_PARAM_ENGINE, Engine.PARAM_POSITION_ENGINE); - } - result = mITts.synthesizeToFile(mPackageName, text, mCachedParams, filename) ? - SUCCESS : ERROR; - } catch (RemoteException e) { - restart("synthesizeToFile", e); - } catch (NullPointerException e) { - restart("synthesizeToFile", e); - } catch (IllegalStateException e) { - restart("synthesizeToFile", e); - } finally { - resetCachedParams(); - } - return result; + }, ERROR, "synthesizeToFile"); + } + + private Bundle getParams(HashMap<String, String> params) { + if (params != null && !params.isEmpty()) { + Bundle bundle = new Bundle(mParams); + copyIntParam(bundle, params, Engine.KEY_PARAM_STREAM); + copyStringParam(bundle, params, Engine.KEY_PARAM_UTTERANCE_ID); + copyFloatParam(bundle, params, Engine.KEY_PARAM_VOLUME); + copyFloatParam(bundle, params, Engine.KEY_PARAM_PAN); + return bundle; + } else { + return mParams; } } + private void copyStringParam(Bundle bundle, HashMap<String, String> params, String key) { + String value = params.get(key); + if (value != null) { + bundle.putString(key, value); + } + } - /** - * Convenience method to reset the cached parameters to the current default values - * if they are not persistent between calls to the service. - */ - private void resetCachedParams() { - mCachedParams[Engine.PARAM_POSITION_STREAM + 1] = - String.valueOf(Engine.DEFAULT_STREAM); - mCachedParams[Engine.PARAM_POSITION_UTTERANCE_ID+ 1] = ""; - mCachedParams[Engine.PARAM_POSITION_VOLUME + 1] = Engine.DEFAULT_VOLUME_STRING; - mCachedParams[Engine.PARAM_POSITION_PAN + 1] = Engine.DEFAULT_PAN_STRING; + private void copyIntParam(Bundle bundle, HashMap<String, String> params, String key) { + String valueString = params.get(key); + if (!TextUtils.isEmpty(valueString)) { + try { + int value = Integer.parseInt(valueString); + bundle.putInt(key, value); + } catch (NumberFormatException ex) { + // don't set the value in the bundle + } + } } - /** - * Convenience method to save a parameter in the cached parameter array, at the given index, - * for a property saved in the given hashmap. - */ - private void setCachedParam(HashMap<String,String> params, String key, int keyIndex) { - String extra = params.get(key); - if (extra != null) { - mCachedParams[keyIndex+1] = extra; + private void copyFloatParam(Bundle bundle, HashMap<String, String> params, String key) { + String valueString = params.get(key); + if (!TextUtils.isEmpty(valueString)) { + try { + float value = Float.parseFloat(valueString); + bundle.putFloat(key, value); + } catch (NumberFormatException ex) { + // don't set the value in the bundle + } } } /** - * Sets the OnUtteranceCompletedListener that will fire when an utterance completes. + * Sets the listener that will be notified when synthesis of an utterance completes. * - * @param listener - * The OnUtteranceCompletedListener + * @param listener The listener to use. * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ - public int setOnUtteranceCompletedListener( - final OnUtteranceCompletedListener listener) { - synchronized (mStartLock) { - int result = ERROR; - if (!mStarted) { - return result; - } - mITtscallback = new ITtsCallback.Stub() { - public void utteranceCompleted(String utteranceId) throws RemoteException { - if (listener != null) { - listener.onUtteranceCompleted(utteranceId); + public int setOnUtteranceCompletedListener(final OnUtteranceCompletedListener listener) { + return runAction(new Action<Integer>() { + @Override + public Integer run(ITextToSpeechService service) throws RemoteException { + ITextToSpeechCallback.Stub callback = new ITextToSpeechCallback.Stub() { + public void utteranceCompleted(String utteranceId) { + if (listener != null) { + listener.onUtteranceCompleted(utteranceId); + } } - } - }; - try { - result = mITts.registerCallback(mPackageName, mITtscallback); - } catch (RemoteException e) { - restart("registerCallback", e); - } catch (NullPointerException e) { - restart("registerCallback", e); - } catch (IllegalStateException e) { - restart("registerCallback", e); + }; + service.setCallback(getPackageName(), callback); + return SUCCESS; } - return result; - } + }, ERROR, "setOnUtteranceCompletedListener"); } /** - * Sets the speech synthesis engine to be used by its packagename. + * Sets the TTS engine to use. * - * @param enginePackageName - * The packagename for the synthesis engine (ie, "com.svox.pico") + * @param enginePackageName The package name for the synthesis engine (e.g. "com.svox.pico") * - * @return Code indicating success or failure. See {@link #ERROR} and {@link #SUCCESS}. + * @return {@link #ERROR} or {@link #SUCCESS}. */ + // TODO: add @Deprecated{This method does not tell the caller when the new engine + // has been initialized. You should create a new TextToSpeech object with the new + // engine instead.} public int setEngineByPackageName(String enginePackageName) { - synchronized (mStartLock) { - int result = TextToSpeech.ERROR; - if (!mStarted) { - return result; - } - try { - result = mITts.setEngineByPackageName(enginePackageName); - if (result == TextToSpeech.SUCCESS){ - mCachedParams[Engine.PARAM_POSITION_ENGINE + 1] = enginePackageName; - } - } catch (RemoteException e) { - restart("setEngineByPackageName", e); - } catch (NullPointerException e) { - restart("setEngineByPackageName", e); - } catch (IllegalStateException e) { - restart("setEngineByPackageName", e); - } - return result; - } + mRequestedEngine = enginePackageName; + return initTts(); } - /** - * Gets the packagename of the default speech synthesis engine. + * Gets the package name of the default speech synthesis engine. * - * @return Packagename of the TTS engine that the user has chosen as their default. + * @return Package name of the TTS engine that the user has chosen as their default. */ public String getDefaultEngine() { - synchronized (mStartLock) { - String engineName = ""; - if (!mStarted) { - return engineName; - } - try { - engineName = mITts.getDefaultEngine(); - } catch (RemoteException e) { - restart("getDefaultEngine", e); - } catch (NullPointerException e) { - restart("getDefaultEngine", e); - } catch (IllegalStateException e) { - restart("getDefaultEngine", e); + String engine = Settings.Secure.getString(mContext.getContentResolver(), + Settings.Secure.TTS_DEFAULT_SYNTH); + return engine != null ? engine : Engine.DEFAULT_ENGINE; + } + + /** + * Checks whether the user's settings should override settings requested by the calling + * application. + */ + public boolean areDefaultsEnforced() { + return Settings.Secure.getInt(mContext.getContentResolver(), + Settings.Secure.TTS_USE_DEFAULTS, Engine.USE_DEFAULTS) == 1; + } + + private boolean isEngineEnabled(String engine) { + if (Engine.DEFAULT_ENGINE.equals(engine)) { + return true; + } + for (String enabled : getEnabledEngines()) { + if (engine.equals(enabled)) { + return true; } - return engineName; } + return false; } + private String[] getEnabledEngines() { + String str = Settings.Secure.getString(mContext.getContentResolver(), + Settings.Secure.TTS_ENABLED_PLUGINS); + if (TextUtils.isEmpty(str)) { + return new String[0]; + } + return str.split(" "); + } /** - * Returns whether or not the user is forcing their defaults to override the - * Text-To-Speech settings set by applications. + * Gets a list of all installed TTS engines. * - * @return Whether or not defaults are enforced. + * @return A list of engine info objects. The list can be empty, but will never by {@code null}. + * + * @hide Pending approval */ - public boolean areDefaultsEnforced() { - synchronized (mStartLock) { - boolean defaultsEnforced = false; - if (!mStarted) { - return defaultsEnforced; + public List<EngineInfo> getEngines() { + PackageManager pm = mContext.getPackageManager(); + Intent intent = new Intent(Engine.INTENT_ACTION_TTS_SERVICE); + List<ResolveInfo> resolveInfos = pm.queryIntentServices(intent, 0); + if (resolveInfos == null) return Collections.emptyList(); + List<EngineInfo> engines = new ArrayList<EngineInfo>(resolveInfos.size()); + for (ResolveInfo resolveInfo : resolveInfos) { + ServiceInfo service = resolveInfo.serviceInfo; + if (service != null) { + EngineInfo engine = new EngineInfo(); + // Using just the package name isn't great, since it disallows having + // multiple engines in the same package, but that's what the existing API does. + engine.name = service.packageName; + CharSequence label = service.loadLabel(pm); + engine.label = TextUtils.isEmpty(label) ? engine.name : label.toString(); + engine.icon = service.getIconResource(); + engines.add(engine); } + } + return engines; + } + + private class Connection implements ServiceConnection { + private ITextToSpeechService mService; + + public void onServiceConnected(ComponentName name, IBinder service) { + Log.i(TAG, "Connected to " + name); + synchronized(mStartLock) { + if (mServiceConnection != null) { + // Disconnect any previous service connection + mServiceConnection.disconnect(); + } + mServiceConnection = this; + mService = ITextToSpeechService.Stub.asInterface(service); + dispatchOnInit(SUCCESS); + } + } + + public void onServiceDisconnected(ComponentName name) { + synchronized(mStartLock) { + mService = null; + // If this is the active connection, clear it + if (mServiceConnection == this) { + mServiceConnection = null; + } + } + } + + public void disconnect() { + mContext.unbindService(this); + } + + public <R> R runAction(Action<R> action, R errorResult, String method, boolean reconnect) { try { - defaultsEnforced = mITts.areDefaultsEnforced(); - } catch (RemoteException e) { - restart("areDefaultsEnforced", e); - } catch (NullPointerException e) { - restart("areDefaultsEnforced", e); - } catch (IllegalStateException e) { - restart("areDefaultsEnforced", e); + synchronized (mStartLock) { + if (mService == null) { + Log.w(TAG, method + " failed: not connected to TTS engine"); + return errorResult; + } + return action.run(mService); + } + } catch (RemoteException ex) { + Log.e(TAG, method + " failed", ex); + if (reconnect) { + disconnect(); + initTts(); + } + return errorResult; } - return defaultsEnforced; } } + private interface Action<R> { + R run(ITextToSpeechService service) throws RemoteException; + } + /** - * Restarts the TTS after a failure. + * Information about an installed text-to-speech engine. + * + * @see TextToSpeech#getEngines + * @hide Pending approval */ - private void restart(String method, Exception e) { - // TTS died; restart it. - Log.e(TAG, method, e); - mStarted = false; - initTts(); + public static class EngineInfo { + /** + * Engine package name.. + */ + public String name; + /** + * Localized label for the engine. + */ + public String label; + /** + * Icon for the engine. + */ + public int icon; + + @Override + public String toString() { + return "EngineInfo{name=" + name + "}"; + } + } } |