| /* |
| * Copyright (C) 2009 Google Inc. |
| * |
| * 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 |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package android.speech.tts; |
| |
| import android.speech.tts.ITts; |
| import android.speech.tts.ITtsCallback; |
| |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.util.HashMap; |
| import java.util.Locale; |
| |
| /** |
| * |
| * Synthesizes speech from text. |
| * |
| * {@hide} |
| */ |
| //TODO #TTS# review + complete javadoc + add links to constants |
| public class TextToSpeech { |
| |
| /** |
| * Denotes a successful operation. |
| */ |
| public static final int TTS_SUCCESS = 0; |
| /** |
| * Denotes a generic operation failure. |
| */ |
| public static final int TTS_ERROR = -1; |
| /** |
| * Denotes a failure due to a missing resource. |
| */ |
| public static final int TTS_ERROR_MISSING_RESOURCE = -2; |
| |
| /** |
| * Queue mode where all entries in the playback queue (media to be played |
| * and text to be synthesized) are dropped and replaced by the new entry. |
| */ |
| public static final int TTS_QUEUE_FLUSH = 0; |
| /** |
| * Queue mode where the new entry is added at the end of the playback queue. |
| */ |
| public static final int TTS_QUEUE_ADD = 1; |
| |
| /** |
| * Called when the TTS has initialized. |
| * |
| * The InitListener must implement the onInit function. onInit is passed a |
| * status code indicating the result of the TTS initialization. |
| */ |
| public interface OnInitListener { |
| public void onInit(int status); |
| } |
| |
| /** |
| * Called when the TTS has finished speaking by itself (speaking |
| * finished without being canceled). |
| * |
| */ |
| public interface OnSpeechCompletedListener { |
| public void onSpeechCompleted(); |
| } |
| |
| /** |
| * Internal constants for the TTS functionality |
| * |
| * {@hide} |
| */ |
| public class Engine { |
| // default values for a TTS engine when settings are not found in the provider |
| public static final int FALLBACK_TTS_DEFAULT_RATE = 100; // 1x |
| public static final int FALLBACK_TTS_DEFAULT_PITCH = 100;// 1x |
| public static final int FALLBACK_TTS_USE_DEFAULTS = 0; // false |
| public static final String FALLBACK_TTS_DEFAULT_LANG = "eng"; |
| public static final String FALLBACK_TTS_DEFAULT_COUNTRY = ""; |
| public static final String FALLBACK_TTS_DEFAULT_VARIANT = ""; |
| |
| // return codes for a TTS engine's check data activity |
| public static final int CHECK_VOICE_DATA_PASS = 1; |
| public static final int CHECK_VOICE_DATA_FAIL = 0; |
| public static final int CHECK_VOICE_DATA_BAD_DATA = -1; |
| public static final int CHECK_VOICE_DATA_MISSING_DATA = -2; |
| public static final int CHECK_VOICE_DATA_MISSING_DATA_NO_SDCARD = -3; |
| } |
| |
| /** |
| * Connection needed for the TTS. |
| */ |
| private ServiceConnection mServiceConnection; |
| |
| private ITts mITts = null; |
| private Context mContext = null; |
| private OnInitListener mInitListener = null; |
| private boolean mStarted = false; |
| private final Object mStartLock = new Object(); |
| private ITtsCallback mITtsCallback; |
| private OnSpeechCompletedListener mSpeechCompListener = null; |
| private final Object mSpeechCompListenerLock = new Object(); |
| |
| |
| |
| /** |
| * The constructor for the TTS. |
| * |
| * @param context |
| * The context |
| * @param listener |
| * The InitListener that will be called when the TTS has |
| * initialized successfully. |
| */ |
| public TextToSpeech(Context context, OnInitListener listener) { |
| mContext = context; |
| mInitListener = listener; |
| initTts(); |
| } |
| |
| |
| public void setOnSpeechCompletedListener(final OnSpeechCompletedListener listener) { |
| synchronized(mSpeechCompListenerLock) { |
| mSpeechCompListener = listener; |
| } |
| } |
| |
| |
| private boolean dataFilesCheck() { |
| // TODO #TTS# config manager will be in settings |
| Log.i("TTS_FIXME", "FIXME in Tts: config manager will be in settings"); |
| // TODO #TTS# implement checking of the correct installation of |
| // the data files. |
| |
| return true; |
| } |
| |
| |
| 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); |
| try { |
| mITtsCallback = new ITtsCallback.Stub() { |
| public void markReached(String mark) |
| throws RemoteException { |
| // call the listener of that event, but not |
| // while locked. |
| OnSpeechCompletedListener listener = null; |
| synchronized(mSpeechCompListenerLock) { |
| listener = mSpeechCompListener; |
| } |
| if (listener != null) { |
| listener.onSpeechCompleted(); |
| } |
| } |
| }; |
| mITts.registerCallback(mITtsCallback); |
| |
| } catch (RemoteException e) { |
| initTts(); |
| return; |
| } |
| |
| mStarted = true; |
| // The callback can become null if the Android OS decides to |
| // restart the TTS process as well as whatever is using it. |
| // In such cases, do nothing - the error handling from the |
| // speaking calls will kick in and force a proper restart of |
| // the TTS. |
| if (mInitListener != null) { |
| // TODO manage failures and missing resources |
| mInitListener.onInit(TTS_SUCCESS); |
| } |
| } |
| } |
| |
| public void onServiceDisconnected(ComponentName name) { |
| synchronized(mStartLock) { |
| mITts = null; |
| mInitListener = null; |
| mStarted = false; |
| } |
| } |
| }; |
| |
| Intent intent = new Intent("android.intent.action.USE_TTS"); |
| intent.addCategory("android.intent.category.TTS"); |
| mContext.bindService(intent, mServiceConnection, |
| Context.BIND_AUTO_CREATE); |
| // TODO handle case where the binding works (should always work) but |
| // the plugin fails |
| } |
| |
| |
| /** |
| * Shuts down the TTS. It is good practice to call this in the onDestroy |
| * method of the Activity that is using the TTS so that the TTS is stopped |
| * cleanly. |
| */ |
| 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. |
| } |
| } |
| |
| |
| /** |
| * Adds a mapping between a string of text and a sound resource in a |
| * package. |
| * |
| * @see #TTS.speak(String text, int queueMode, String[] params) |
| * |
| * @param text |
| * Example: <b><code>"south_south_east"</code></b><br/> |
| * |
| * @param packagename |
| * Pass the packagename of the application that contains the |
| * resource. If the resource is in your own application (this is |
| * the most common case), then put the packagename of your |
| * application here.<br/> |
| * Example: <b>"com.google.marvin.compass"</b><br/> |
| * The packagename can be found in the AndroidManifest.xml of |
| * your application. |
| * <p> |
| * <code><manifest xmlns:android="..." |
| * package="<b>com.google.marvin.compass</b>"></code> |
| * </p> |
| * |
| * @param resourceId |
| * Example: <b><code>R.raw.south_south_east</code></b> |
| */ |
| public void addSpeech(String text, String packagename, int resourceId) { |
| synchronized(mStartLock) { |
| if (!mStarted) { |
| return; |
| } |
| try { |
| mITts.addSpeech(text, packagename, resourceId); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (NullPointerException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (IllegalStateException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| } |
| } |
| |
| |
| /** |
| * Adds a mapping between a string of text and a sound file. Using this, it |
| * is possible to add custom pronounciations for text. |
| * |
| * @param text |
| * The string of text |
| * @param filename |
| * The full path to the sound file (for example: |
| * "/sdcard/mysounds/hello.wav") |
| */ |
| public void addSpeech(String text, String filename) { |
| synchronized (mStartLock) { |
| if (!mStarted) { |
| return; |
| } |
| try { |
| mITts.addSpeechFile(text, filename); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (NullPointerException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (IllegalStateException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| } |
| } |
| |
| |
| /** |
| * Speaks the string using the specified queuing strategy and speech |
| * parameters. Note that the speech parameters are not universally supported |
| * by all engines and will be treated as a hint. The TTS library will try to |
| * fulfill these parameters as much as possible, but there is no guarantee |
| * that the voice used will have the properties specified. |
| * |
| * @param text |
| * The string of text to be spoken. |
| * @param queueMode |
| * The queuing strategy to use. |
| * See TTS_QUEUE_ADD and TTS_QUEUE_FLUSH. |
| * @param params |
| * The hashmap of speech parameters to be used. |
| */ |
| public void speak(String text, int queueMode, HashMap<String,String> params) |
| { |
| synchronized (mStartLock) { |
| Log.i("TTS received: ", text); |
| if (!mStarted) { |
| return; |
| } |
| try { |
| // TODO support extra parameters, passing null for the moment |
| mITts.speak(text, queueMode, null); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (NullPointerException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (IllegalStateException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| } |
| } |
| |
| |
| /** |
| * Plays the earcon using the specified queueing mode and parameters. |
| * |
| * @param earcon |
| * The earcon that should be played |
| * @param queueMode |
| * See TTS_QUEUE_ADD and TTS_QUEUE_FLUSH. |
| * @param params |
| * The hashmap of parameters to be used. |
| */ |
| public void playEarcon(String earcon, int queueMode, |
| HashMap<String,String> params) { |
| synchronized (mStartLock) { |
| if (!mStarted) { |
| return; |
| } |
| try { |
| // TODO support extra parameters, passing null for the moment |
| mITts.playEarcon(earcon, queueMode, null); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (NullPointerException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (IllegalStateException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| } |
| } |
| |
| |
| public void playSilence(long durationInMs, int queueMode) { |
| // TODO implement, already present in TTS service |
| } |
| |
| |
| /** |
| * Returns whether or not the TTS is busy speaking. |
| * |
| * @return Whether or not the TTS is busy speaking. |
| */ |
| public boolean isSpeaking() { |
| synchronized (mStartLock) { |
| if (!mStarted) { |
| return false; |
| } |
| try { |
| return mITts.isSpeaking(); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (NullPointerException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (IllegalStateException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| return false; |
| } |
| } |
| |
| |
| /** |
| * Stops speech from the TTS. |
| */ |
| public void stop() { |
| synchronized (mStartLock) { |
| if (!mStarted) { |
| return; |
| } |
| try { |
| mITts.stop(); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (NullPointerException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (IllegalStateException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| } |
| } |
| |
| |
| |
| /** |
| * Sets the speech rate for the TTS engine. |
| * |
| * Note that the speech rate is not universally supported by all engines and |
| * will be treated as a hint. The TTS library will try to use the specified |
| * speech rate, but there is no guarantee. |
| * This has no effect on any pre-recorded speech. |
| * |
| * @param speechRate |
| * The speech rate for the TTS 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). |
| */ |
| public void setSpeechRate(float speechRate) { |
| synchronized (mStartLock) { |
| if (!mStarted) { |
| return; |
| } |
| try { |
| if (speechRate > 0) { |
| mITts.setSpeechRate((int)(speechRate*100)); |
| } |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| } |
| } |
| |
| |
| /** |
| * Sets the language for the TTS engine. |
| * |
| * Note that the language is not universally supported by all engines and |
| * will be treated as a hint. The TTS library will try to use the specified |
| * language as represented by the Locale, but there is no guarantee. |
| * |
| * @param loc |
| * The locale describing the language to be used. |
| */ |
| public void setLanguage(Locale loc) { |
| synchronized (mStartLock) { |
| if (!mStarted) { |
| return; |
| } |
| try { |
| mITts.setLanguage(loc.getISO3Language(), loc.getISO3Country(), loc.getVariant()); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| } |
| } |
| |
| |
| /** |
| * Speaks the given text using the specified queueing mode and parameters. |
| * |
| * @param text |
| * The String of text that should be synthesized |
| * @param params |
| * A hashmap of parameters. |
| * @param filename |
| * The string that gives the full output filename; it should be |
| * something like "/sdcard/myappsounds/mysound.wav". |
| * @return A boolean that indicates if the synthesis succeeded |
| */ |
| public boolean synthesizeToFile(String text, HashMap<String,String> params, |
| String filename) { |
| synchronized (mStartLock) { |
| if (!mStarted) { |
| return false; |
| } |
| try { |
| // TODO support extra parameters, passing null for the moment |
| return mITts.synthesizeToFile(text, null, filename); |
| } catch (RemoteException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (NullPointerException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } catch (IllegalStateException e) { |
| // TTS died; restart it. |
| mStarted = false; |
| initTts(); |
| } |
| return false; |
| } |
| } |
| |
| |
| } |