| /* |
| * Copyright (C) 2010 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 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 com.android.voicedialer; |
| |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.bluetooth.BluetoothAdapter; |
| import android.bluetooth.BluetoothDevice; |
| import android.bluetooth.BluetoothHeadset; |
| import android.bluetooth.BluetoothProfile; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.DialogInterface; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.media.AudioManager; |
| import android.media.ToneGenerator; |
| import android.os.Bundle; |
| import android.os.Handler; |
| import android.os.PowerManager; |
| import android.os.PowerManager.WakeLock; |
| import android.os.SystemProperties; |
| import android.os.Vibrator; |
| import android.speech.tts.TextToSpeech; |
| import android.util.Log; |
| import android.view.View; |
| import android.view.WindowManager; |
| import android.widget.TextView; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.HashMap; |
| import java.util.List; |
| |
| /** |
| * TODO: get rid of the anonymous classes |
| * |
| * This class is the user interface of the VoiceDialer application. |
| * It begins in the INITIALIZING state. |
| * |
| * INITIALIZING : |
| * This transitions out on events from TTS and the BluetoothHeadset |
| * once TTS initialized and SCO channel set up: |
| * * prompt the user "speak now" |
| * * transition to the SPEAKING_GREETING state |
| * |
| * SPEAKING_GREETING: |
| * This transitions out only on events from TTS or the fallback runnable |
| * once the greeting utterance completes: |
| * * begin listening for the command using the {@link CommandRecognizerEngine} |
| * * transition to the WAITING_FOR_COMMAND state |
| * |
| * WAITING_FOR_COMMAND : |
| * This transitions out only on events from the recognizer |
| * on RecognitionFailure or RecognitionError: |
| * * begin speaking "try again." |
| * * transition to state SPEAKING_TRY_AGAIN |
| * on RecognitionSuccess: |
| * single result: |
| * * begin speaking the sentence describing the intent |
| * * transition to the SPEAKING_CHOSEN_ACTION |
| * multiple results: |
| * * begin speaking each of the choices in order |
| * * transition to the SPEAKING_CHOICES state |
| * |
| * SPEAKING_TRY_AGAIN: |
| * This transitions out only on events from TTS or the fallback runnable |
| * once the try again utterance completes: |
| * * begin listening for the command using the {@link CommandRecognizerEngine} |
| * * transition to the LISTENING_FOR_COMMAND state |
| * |
| * SPEAKING_CHOSEN_ACTION: |
| * This transitions out only on events from TTS or the fallback runnable |
| * once the utterance completes: |
| * * dispatch the intent that was chosen |
| * * transition to the EXITING state |
| * * finish the activity |
| * |
| * SPEAKING_CHOICES: |
| * This transitions out only on events from TTS or the fallback runnable |
| * once the utterance completes: |
| * * begin listening for the user's choice using the |
| * {@link PhoneTypeChoiceRecognizerEngine} |
| * * transition to the WAITING_FOR_CHOICE state. |
| * |
| * WAITING_FOR_CHOICE: |
| * This transitions out only on events from the recognizer |
| * on RecognitionFailure or RecognitionError: |
| * * begin speaking the "invalid choice" message, along with the list |
| * of choices |
| * * transition to the SPEAKING_CHOICES state |
| * on RecognitionSuccess: |
| * if the result is "try again", prompt the user to say a command, begin |
| * listening for the command, and transition back to the WAITING_FOR_COMMAND |
| * state. |
| * if the result is "exit", then being speaking the "goodbye" message and |
| * transition to the SPEAKING_GOODBYE state. |
| * if the result is a valid choice, begin speaking the action chosen,initiate |
| * the command the user has choose and exit. |
| * if not a valid choice, speak the "invalid choice" message, begin |
| * speaking the choices in order again, transition to the |
| * SPEAKING_CHOICES |
| * |
| * SPEAKING_GOODBYE: |
| * This transitions out only on events from TTS or the fallback runnable |
| * after a time out, finish the activity. |
| * |
| */ |
| |
| public class VoiceDialerActivity extends Activity { |
| |
| private static final String TAG = "VoiceDialerActivity"; |
| |
| private static final String MICROPHONE_EXTRA = "microphone"; |
| private static final String CONTACTS_EXTRA = "contacts"; |
| |
| private static final String SPEAK_NOW_UTTERANCE = "speak_now"; |
| private static final String TRY_AGAIN_UTTERANCE = "try_again"; |
| private static final String CHOSEN_ACTION_UTTERANCE = "chose_action"; |
| private static final String GOODBYE_UTTERANCE = "goodbye"; |
| private static final String CHOICES_UTTERANCE = "choices"; |
| |
| private static final int FIRST_UTTERANCE_DELAY = 300; |
| private static final int MAX_TTS_DELAY = 6000; |
| private static final int EXIT_DELAY = 2000; |
| |
| private static final int BLUETOOTH_SAMPLE_RATE = 8000; |
| private static final int REGULAR_SAMPLE_RATE = 11025; |
| |
| private static final int INITIALIZING = 0; |
| private static final int SPEAKING_GREETING = 1; |
| private static final int WAITING_FOR_COMMAND = 2; |
| private static final int SPEAKING_TRY_AGAIN = 3; |
| private static final int SPEAKING_CHOICES = 4; |
| private static final int WAITING_FOR_CHOICE = 5; |
| private static final int WAITING_FOR_DIALOG_CHOICE = 6; |
| private static final int SPEAKING_CHOSEN_ACTION = 7; |
| private static final int SPEAKING_GOODBYE = 8; |
| private static final int EXITING = 9; |
| |
| private static final CommandRecognizerEngine mCommandEngine = |
| new CommandRecognizerEngine(); |
| private static final PhoneTypeChoiceRecognizerEngine mPhoneTypeChoiceEngine = |
| new PhoneTypeChoiceRecognizerEngine(); |
| private CommandRecognizerClient mCommandClient; |
| private ChoiceRecognizerClient mChoiceClient; |
| private ToneGenerator mToneGenerator; |
| private Handler mHandler; |
| private Thread mRecognizerThread = null; |
| private AudioManager mAudioManager; |
| private BluetoothHeadset mBluetoothHeadset; |
| private BluetoothDevice mBluetoothDevice; |
| private BluetoothAdapter mAdapter; |
| private TextToSpeech mTts; |
| private HashMap<String, String> mTtsParams; |
| private VoiceDialerBroadcastReceiver mReceiver; |
| private boolean mWaitingForTts; |
| private boolean mWaitingForScoConnection; |
| private Intent[] mAvailableChoices; |
| private Intent mChosenAction; |
| private int mBluetoothVoiceVolume; |
| private int mState; |
| private AlertDialog mAlertDialog; |
| private Runnable mFallbackRunnable; |
| private boolean mUsingBluetooth = false; |
| private int mSampleRate; |
| private WakeLock mWakeLock; |
| |
| @Override |
| protected void onCreate(Bundle icicle) { |
| super.onCreate(icicle); |
| // TODO: All of this state management and holding of |
| // connections to the TTS engine and recognizer really |
| // belongs in a service. The activity can be stopped or deleted |
| // and recreated for lots of reasons. |
| // It's way too late in the ICS release cycle for a change |
| // like this now though. |
| // MHibdon Sept 20 2011 |
| mHandler = new Handler(); |
| mAudioManager = (AudioManager)getSystemService(AUDIO_SERVICE); |
| mToneGenerator = new ToneGenerator(AudioManager.STREAM_RING, |
| ToneGenerator.MAX_VOLUME); |
| |
| acquireWakeLock(this); |
| |
| mState = INITIALIZING; |
| mChosenAction = null; |
| mAudioManager.requestAudioFocus( |
| null, AudioManager.STREAM_MUSIC, |
| AudioManager.AUDIOFOCUS_GAIN_TRANSIENT); |
| |
| // set this flag so this activity will stay in front of the keyguard |
| int flags = WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED; |
| getWindow().addFlags(flags); |
| |
| // open main window |
| setTheme(android.R.style.Theme_Dialog); |
| setTitle(R.string.title); |
| setContentView(R.layout.voice_dialing); |
| findViewById(R.id.microphone_view).setVisibility(View.INVISIBLE); |
| findViewById(R.id.retry_view).setVisibility(View.INVISIBLE); |
| findViewById(R.id.microphone_loading_view).setVisibility(View.VISIBLE); |
| if (RecognizerLogger.isEnabled(this)) { |
| ((TextView) findViewById(R.id.substate)).setText(R.string.logging_enabled); |
| } |
| |
| // Get handle to BluetoothHeadset object |
| IntentFilter audioStateFilter; |
| audioStateFilter = new IntentFilter(); |
| audioStateFilter.addAction(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED); |
| audioStateFilter.addAction(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED); |
| mReceiver = new VoiceDialerBroadcastReceiver(); |
| registerReceiver(mReceiver, audioStateFilter); |
| |
| mCommandEngine.setContactsFile(newFile(getArg(CONTACTS_EXTRA))); |
| mCommandEngine.setMinimizeResults(true); |
| mCommandEngine.setAllowOpenEntries(false); |
| mCommandClient = new CommandRecognizerClient(); |
| mChoiceClient = new ChoiceRecognizerClient(); |
| |
| mAdapter = BluetoothAdapter.getDefaultAdapter(); |
| if (BluetoothHeadset.isBluetoothVoiceDialingEnabled(this) && mAdapter != null) { |
| if (!mAdapter.getProfileProxy(this, mBluetoothHeadsetServiceListener, |
| BluetoothProfile.HEADSET)) { |
| Log.e(TAG, "Getting Headset Proxy failed"); |
| } |
| |
| } else { |
| mUsingBluetooth = false; |
| if (false) Log.d(TAG, "bluetooth unavailable"); |
| mSampleRate = REGULAR_SAMPLE_RATE; |
| mCommandEngine.setMinimizeResults(false); |
| mCommandEngine.setAllowOpenEntries(true); |
| |
| // we're not using bluetooth apparently, just start listening. |
| listenForCommand(); |
| } |
| |
| } |
| |
| class ErrorRunnable implements Runnable { |
| private int mErrorMsg; |
| public ErrorRunnable(int errorMsg) { |
| mErrorMsg = errorMsg; |
| } |
| |
| public void run() { |
| // put up an error and exit |
| mHandler.removeCallbacks(mMicFlasher); |
| ((TextView)findViewById(R.id.state)).setText(R.string.failure); |
| ((TextView)findViewById(R.id.substate)).setText(mErrorMsg); |
| ((TextView)findViewById(R.id.substate)).setText( |
| R.string.headset_connection_lost); |
| findViewById(R.id.microphone_view).setVisibility(View.INVISIBLE); |
| findViewById(R.id.retry_view).setVisibility(View.VISIBLE); |
| |
| |
| if (!mUsingBluetooth) { |
| playSound(ToneGenerator.TONE_PROP_NACK); |
| } |
| } |
| } |
| |
| class OnTtsCompletionRunnable implements Runnable { |
| private boolean mFallback; |
| |
| OnTtsCompletionRunnable(boolean fallback) { |
| mFallback = fallback; |
| } |
| |
| public void run() { |
| if (mFallback) { |
| Log.e(TAG, "utterance completion not delivered, using fallback"); |
| } |
| Log.d(TAG, "onTtsCompletionRunnable"); |
| if (mState == SPEAKING_GREETING || mState == SPEAKING_TRY_AGAIN) { |
| listenForCommand(); |
| } else if (mState == SPEAKING_CHOICES) { |
| listenForChoice(); |
| } else if (mState == SPEAKING_GOODBYE) { |
| mState = EXITING; |
| finish(); |
| } else if (mState == SPEAKING_CHOSEN_ACTION) { |
| mState = EXITING; |
| startActivityHelp(mChosenAction); |
| finish(); |
| } |
| } |
| } |
| |
| class GreetingRunnable implements Runnable { |
| public void run() { |
| mState = SPEAKING_GREETING; |
| mTtsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, |
| SPEAK_NOW_UTTERANCE); |
| mTts.speak(getString(R.string.speak_now_tts), |
| TextToSpeech.QUEUE_FLUSH, |
| mTtsParams); |
| // Normally, we will begin listening for the command after the |
| // utterance completes. As a fallback in case the utterance |
| // does not complete, post a delayed runnable to fire |
| // the intent. |
| mFallbackRunnable = new OnTtsCompletionRunnable(true); |
| mHandler.postDelayed(mFallbackRunnable, MAX_TTS_DELAY); |
| } |
| } |
| |
| class TtsInitListener implements TextToSpeech.OnInitListener { |
| public void onInit(int status) { |
| // status can be either TextToSpeech.SUCCESS or TextToSpeech.ERROR. |
| if (false) Log.d(TAG, "onInit for tts"); |
| if (status != TextToSpeech.SUCCESS) { |
| // Initialization failed. |
| Log.e(TAG, "Could not initialize TextToSpeech."); |
| mHandler.post(new ErrorRunnable(R.string.recognition_error)); |
| exitActivity(); |
| return; |
| } |
| |
| if (mTts == null) { |
| Log.e(TAG, "null tts"); |
| mHandler.post(new ErrorRunnable(R.string.recognition_error)); |
| exitActivity(); |
| return; |
| } |
| |
| mTts.setOnUtteranceCompletedListener(new OnUtteranceCompletedListener()); |
| |
| // The TTS engine has been successfully initialized. |
| mWaitingForTts = false; |
| |
| // TTS over bluetooth is really loud, |
| // Limit volume to -18dB. Stream volume range represents approximately 50dB |
| // (See AudioSystem.cpp linearToLog()) so the number of steps corresponding |
| // to 18dB is 18 / (50 / maxSteps). |
| mBluetoothVoiceVolume = mAudioManager.getStreamVolume( |
| AudioManager.STREAM_BLUETOOTH_SCO); |
| int maxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_BLUETOOTH_SCO); |
| int volume = maxVolume - ((18 / (50/maxVolume)) + 1); |
| if (mBluetoothVoiceVolume > volume) { |
| mAudioManager.setStreamVolume(AudioManager.STREAM_BLUETOOTH_SCO, volume, 0); |
| } |
| |
| if (mWaitingForScoConnection) { |
| // the bluetooth connection is not up yet, still waiting. |
| } else { |
| // we now have SCO connection and TTS, so we can start. |
| mHandler.postDelayed(new GreetingRunnable(), FIRST_UTTERANCE_DELAY); |
| } |
| } |
| } |
| |
| class OnUtteranceCompletedListener |
| implements TextToSpeech.OnUtteranceCompletedListener { |
| public void onUtteranceCompleted(String utteranceId) { |
| if (false) Log.d(TAG, "onUtteranceCompleted " + utteranceId); |
| // since the utterance has completed, we no longer need the fallback. |
| mHandler.removeCallbacks(mFallbackRunnable); |
| mFallbackRunnable = null; |
| mHandler.post(new OnTtsCompletionRunnable(false)); |
| } |
| } |
| |
| private void updateBluetoothParameters(boolean connected) { |
| if (connected) { |
| if (false) Log.d(TAG, "using bluetooth"); |
| mUsingBluetooth = true; |
| |
| mBluetoothHeadset.startVoiceRecognition(mBluetoothDevice); |
| |
| mSampleRate = BLUETOOTH_SAMPLE_RATE; |
| mCommandEngine.setMinimizeResults(true); |
| mCommandEngine.setAllowOpenEntries(false); |
| |
| // we can't start recognizing until we get connected to the BluetoothHeadset |
| // and have a connected audio state. We will listen for these |
| // states to change. |
| mWaitingForScoConnection = true; |
| |
| // initialize the text to speech system |
| mWaitingForTts = true; |
| mTts = new TextToSpeech(VoiceDialerActivity.this, new TtsInitListener()); |
| mTtsParams = new HashMap<String, String>(); |
| mTtsParams.put(TextToSpeech.Engine.KEY_PARAM_STREAM, |
| String.valueOf(AudioManager.STREAM_VOICE_CALL)); |
| // we need to wait for the TTS system and the SCO connection |
| // before we can start listening. |
| } else { |
| if (false) Log.d(TAG, "not using bluetooth"); |
| mUsingBluetooth = false; |
| mSampleRate = REGULAR_SAMPLE_RATE; |
| mCommandEngine.setMinimizeResults(false); |
| mCommandEngine.setAllowOpenEntries(true); |
| |
| // we're not using bluetooth apparently, just start listening. |
| listenForCommand(); |
| } |
| } |
| |
| private BluetoothProfile.ServiceListener mBluetoothHeadsetServiceListener = |
| new BluetoothProfile.ServiceListener() { |
| public void onServiceConnected(int profile, BluetoothProfile proxy) { |
| if (false) Log.d(TAG, "onServiceConnected"); |
| mBluetoothHeadset = (BluetoothHeadset) proxy; |
| |
| List<BluetoothDevice> deviceList = mBluetoothHeadset.getConnectedDevices(); |
| |
| if (deviceList.size() > 0) { |
| mBluetoothDevice = deviceList.get(0); |
| int state = mBluetoothHeadset.getConnectionState(mBluetoothDevice); |
| if (false) Log.d(TAG, "headset status " + state); |
| |
| // We are already connnected to a headset |
| if (state == BluetoothHeadset.STATE_CONNECTED) { |
| updateBluetoothParameters(true); |
| return; |
| } |
| } |
| updateBluetoothParameters(false); |
| } |
| |
| public void onServiceDisconnected(int profile) { |
| mBluetoothHeadset = null; |
| } |
| }; |
| |
| private class VoiceDialerBroadcastReceiver extends BroadcastReceiver { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| String action = intent.getAction(); |
| if (action.equals(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED)) { |
| |
| BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); |
| int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE, -1); |
| |
| if (false) Log.d(TAG, "HEADSET STATE -> " + state); |
| |
| if (state == BluetoothProfile.STATE_CONNECTED) { |
| if (device == null) { |
| return; |
| } |
| mBluetoothDevice = device; |
| updateBluetoothParameters(true); |
| } else if (state == BluetoothProfile.STATE_DISCONNECTED) { |
| mBluetoothDevice = null; |
| updateBluetoothParameters(false); |
| } |
| } else if (action.equals(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED)) { |
| int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE, -1); |
| int prevState = intent.getIntExtra(BluetoothProfile.EXTRA_PREVIOUS_STATE, -1); |
| if (state == BluetoothHeadset.STATE_AUDIO_CONNECTED && |
| mWaitingForScoConnection) { |
| // SCO channel has just become available. |
| mWaitingForScoConnection = false; |
| if (mWaitingForTts) { |
| // still waiting for the TTS to be set up. |
| } else { |
| // we now have SCO connection and TTS, so we can start. |
| mHandler.postDelayed(new GreetingRunnable(), FIRST_UTTERANCE_DELAY); |
| } |
| } else if (prevState == BluetoothHeadset.STATE_AUDIO_CONNECTED) { |
| if (!mWaitingForScoConnection) { |
| // apparently our connection to the headset has dropped. |
| // we won't be able to continue voicedialing. |
| if (false) Log.d(TAG, "lost sco connection"); |
| |
| mHandler.post(new ErrorRunnable( |
| R.string.headset_connection_lost)); |
| |
| exitActivity(); |
| } |
| } |
| } |
| } |
| } |
| |
| private void askToTryAgain() { |
| // get work off UAPI thread |
| mHandler.post(new Runnable() { |
| public void run() { |
| if (mAlertDialog != null) { |
| mAlertDialog.dismiss(); |
| } |
| |
| mHandler.removeCallbacks(mMicFlasher); |
| ((TextView)findViewById(R.id.state)).setText(R.string.please_try_again); |
| findViewById(R.id.state).setVisibility(View.VISIBLE); |
| findViewById(R.id.microphone_view).setVisibility(View.INVISIBLE); |
| findViewById(R.id.retry_view).setVisibility(View.VISIBLE); |
| |
| if (mUsingBluetooth) { |
| mState = SPEAKING_TRY_AGAIN; |
| mTtsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, |
| TRY_AGAIN_UTTERANCE); |
| mTts.speak(getString(R.string.no_results_tts), |
| TextToSpeech.QUEUE_FLUSH, |
| mTtsParams); |
| |
| // Normally, the we will start listening after the |
| // utterance completes. As a fallback in case the utterance |
| // does not complete, post a delayed runnable to fire |
| // the intent. |
| mFallbackRunnable = new OnTtsCompletionRunnable(true); |
| mHandler.postDelayed(mFallbackRunnable, MAX_TTS_DELAY); |
| } else { |
| try { |
| Thread.sleep(playSound(ToneGenerator.TONE_PROP_NACK)); |
| } catch (InterruptedException e) { |
| } |
| // we are not using tts, so we just start listening again. |
| listenForCommand(); |
| } |
| } |
| }); |
| } |
| |
| private void performChoice() { |
| if (mUsingBluetooth) { |
| String sentenceSpoken = spaceOutDigits( |
| mChosenAction.getStringExtra( |
| RecognizerEngine.SENTENCE_EXTRA)); |
| |
| mState = SPEAKING_CHOSEN_ACTION; |
| mTtsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, |
| CHOSEN_ACTION_UTTERANCE); |
| mTts.speak(sentenceSpoken, |
| TextToSpeech.QUEUE_FLUSH, |
| mTtsParams); |
| |
| // Normally, the intent will be dispatched after the |
| // utterance completes. As a fallback in case the utterance |
| // does not complete, post a delayed runnable to fire |
| // the intent. |
| mFallbackRunnable = new OnTtsCompletionRunnable(true); |
| mHandler.postDelayed(mFallbackRunnable, MAX_TTS_DELAY); |
| } else { |
| // just dispatch the intent |
| startActivityHelp(mChosenAction); |
| finish(); |
| } |
| } |
| |
| private void waitForChoice() { |
| if (mUsingBluetooth) { |
| // We are running in bluetooth mode, and we have |
| // multiple matches. Speak the choices and let |
| // the user choose. |
| |
| // We will not start listening until the utterance |
| // of the choice list completes. |
| speakChoices(); |
| |
| // Normally, listening will begin after the |
| // utterance completes. As a fallback in case the utterance |
| // does not complete, post a delayed runnable to begin |
| // listening. |
| mFallbackRunnable = new OnTtsCompletionRunnable(true); |
| mHandler.postDelayed(mFallbackRunnable, MAX_TTS_DELAY); |
| } else { |
| // We are not running in bluetooth mode, so all |
| // we need to do is wait for the user to select |
| // a choice from the alert dialog. We will wait |
| // indefinitely for this. |
| mState = WAITING_FOR_DIALOG_CHOICE; |
| } |
| } |
| |
| private class CommandRecognizerClient implements RecognizerClient { |
| static final int MIN_VOLUME_TO_SKIP = 2; |
| /** |
| * Called by the {@link RecognizerEngine} when the microphone is started. |
| */ |
| public void onMicrophoneStart(InputStream mic) { |
| if (false) Log.d(TAG, "onMicrophoneStart"); |
| |
| if (!mUsingBluetooth) { |
| playSound(ToneGenerator.TONE_PROP_BEEP); |
| |
| int ringVolume = mAudioManager.getStreamVolume( |
| AudioManager.STREAM_RING); |
| Log.d(TAG, "ringVolume " + ringVolume); |
| |
| if (ringVolume >= MIN_VOLUME_TO_SKIP) { |
| // now we're playing a sound, and corrupting the input sample. |
| // So we need to pull that junk off of the input stream so that the |
| // recognizer won't see it. |
| try { |
| skipBeep(mic); |
| } catch (java.io.IOException e) { |
| Log.e(TAG, "IOException " + e); |
| } |
| } else { |
| if (false) Log.d(TAG, "no tone"); |
| } |
| } |
| |
| mHandler.post(new Runnable() { |
| public void run() { |
| findViewById(R.id.retry_view).setVisibility(View.INVISIBLE); |
| findViewById(R.id.microphone_loading_view).setVisibility( |
| View.INVISIBLE); |
| ((TextView)findViewById(R.id.state)).setText(R.string.listening); |
| mHandler.post(mMicFlasher); |
| } |
| }); |
| } |
| |
| /** |
| * Beep detection |
| */ |
| private static final int START_WINDOW_MS = 500; // Beep detection window duration in ms |
| private static final int SINE_FREQ = 400; // base sine frequency on beep |
| private static final int NUM_PERIODS_BLOCK = 10; // number of sine periods in one energy averaging block |
| private static final int THRESHOLD = 8; // absolute pseudo energy threshold |
| private static final int START = 0; // beep detection start |
| private static final int RISING = 1; // beep rising edge start |
| private static final int TOP = 2; // beep constant energy detected |
| |
| void skipBeep(InputStream is) throws IOException { |
| int sampleCount = ((mSampleRate / SINE_FREQ) * NUM_PERIODS_BLOCK); |
| int blockSize = 2 * sampleCount; // energy averaging block |
| |
| if (is == null || blockSize == 0) { |
| return; |
| } |
| |
| byte[] buf = new byte[blockSize]; |
| int maxBytes = 2 * ((START_WINDOW_MS * mSampleRate) / 1000); |
| maxBytes = ((maxBytes-1) / blockSize + 1) * blockSize; |
| |
| int count = 0; |
| int state = START; // detection state |
| long prevE = 0; // previous pseudo energy |
| long peak = 0; |
| int threshold = THRESHOLD*sampleCount; // absolute energy threshold |
| Log.d(TAG, "blockSize " + blockSize); |
| |
| while (count < maxBytes) { |
| int cnt = 0; |
| while (cnt < blockSize) { |
| int n = is.read(buf, cnt, blockSize-cnt); |
| if (n < 0) { |
| throw new java.io.IOException(); |
| } |
| cnt += n; |
| } |
| |
| // compute pseudo energy |
| cnt = blockSize; |
| long sumx = 0; |
| long sumxx = 0; |
| while (cnt >= 2) { |
| short smp = (short)((buf[cnt - 1] << 8) + (buf[cnt - 2] & 0xFF)); |
| sumx += smp; |
| sumxx += smp*smp; |
| cnt -= 2; |
| } |
| long energy = (sumxx*sampleCount - sumx*sumx)/(sampleCount*sampleCount); |
| Log.d(TAG, "sumx " + sumx + " sumxx " + sumxx + " ee " + energy); |
| |
| switch (state) { |
| case START: |
| if (energy > threshold && energy > (prevE * 2) && prevE != 0) { |
| // rising edge if energy doubled and > abs threshold |
| state = RISING; |
| if (false) Log.d(TAG, "start RISING: " + count +" time: "+ (((1000*count)/2)/mSampleRate)); |
| } |
| break; |
| case RISING: |
| if (energy < threshold || energy < (prevE / 2)){ |
| // energy fell back below half of previous, back to start |
| if (false) Log.d(TAG, "back to START: " + count +" time: "+ (((1000*count)/2)/mSampleRate)); |
| peak = 0; |
| state = START; |
| } else if (energy > (prevE / 2) && energy < (prevE * 2)) { |
| // Start of constant energy |
| if (false) Log.d(TAG, "start TOP: " + count +" time: "+ (((1000*count)/2)/mSampleRate)); |
| if (peak < energy) { |
| peak = energy; |
| } |
| state = TOP; |
| } |
| break; |
| case TOP: |
| if (energy < threshold || energy < (peak / 2)) { |
| // e went to less than half of the peak |
| if (false) Log.d(TAG, "end TOP: " + count +" time: "+ (((1000*count)/2)/mSampleRate)); |
| return; |
| } |
| break; |
| } |
| prevE = energy; |
| count += blockSize; |
| } |
| if (false) Log.d(TAG, "no beep detected, timed out"); |
| } |
| |
| /** |
| * Called by the {@link RecognizerEngine} if the recognizer fails. |
| */ |
| public void onRecognitionFailure(final String msg) { |
| if (false) Log.d(TAG, "onRecognitionFailure " + msg); |
| // we had zero results. Just try again. |
| askToTryAgain(); |
| } |
| |
| /** |
| * Called by the {@link RecognizerEngine} on an internal error. |
| */ |
| public void onRecognitionError(final String msg) { |
| if (false) Log.d(TAG, "onRecognitionError " + msg); |
| mHandler.post(new ErrorRunnable(R.string.recognition_error)); |
| exitActivity(); |
| } |
| |
| /** |
| * Called by the {@link RecognizerEngine} when is succeeds. If there is |
| * only one item, then the Intent is dispatched immediately. |
| * If there are more, then an AlertDialog is displayed and the user is |
| * prompted to select. |
| * @param intents a list of Intents corresponding to the sentences. |
| */ |
| public void onRecognitionSuccess(final Intent[] intents) { |
| if (false) Log.d(TAG, "CommandRecognizerClient onRecognitionSuccess " + |
| intents.length); |
| if (mState != WAITING_FOR_COMMAND) { |
| if (false) Log.d(TAG, "not waiting for command, ignoring"); |
| return; |
| } |
| |
| // store the intents in a member variable so that we can access it |
| // later when the user chooses which action to perform. |
| mAvailableChoices = intents; |
| |
| mHandler.post(new Runnable() { |
| public void run() { |
| if (!mUsingBluetooth) { |
| playSound(ToneGenerator.TONE_PROP_ACK); |
| } |
| mHandler.removeCallbacks(mMicFlasher); |
| |
| String[] sentences = new String[intents.length]; |
| for (int i = 0; i < intents.length; i++) { |
| sentences[i] = intents[i].getStringExtra( |
| RecognizerEngine.SENTENCE_EXTRA); |
| } |
| |
| if (intents.length == 0) { |
| onRecognitionFailure("zero intents"); |
| return; |
| } |
| |
| if (intents.length > 0) { |
| // see if we the response was "exit" or "cancel". |
| String value = intents[0].getStringExtra( |
| RecognizerEngine.SEMANTIC_EXTRA); |
| if (false) Log.d(TAG, "value " + value); |
| if ("X".equals(value)) { |
| exitActivity(); |
| return; |
| } |
| } |
| |
| if (mUsingBluetooth && |
| (intents.length == 1 || |
| !Intent.ACTION_CALL_PRIVILEGED.equals( |
| intents[0].getAction()))) { |
| // When we're running in bluetooth mode, we expect |
| // that the user is not looking at the screen and cannot |
| // interact with the device in any way besides voice |
| // commands. In this case we need to minimize how many |
| // interactions the user has to perform in order to call |
| // someone. |
| // So if there is only one match, instead of making the |
| // user confirm, we just assume it's correct, speak |
| // the choice over TTS, and then dispatch it. |
| // If there are multiple matches for some intent type |
| // besides "call", it's too difficult for the user to |
| // explain which one they meant, so we just take the highest |
| // confidence match and dispatch that. |
| |
| // Speak the sentence for the action we are about |
| // to dispatch so that the user knows what is happening. |
| mChosenAction = intents[0]; |
| performChoice(); |
| |
| return; |
| } else { |
| // Either we are not running in bluetooth mode, |
| // or we had multiple matches. Either way, we need |
| // the user to confirm the choice. |
| // Put up a dialog from which the user can select |
| // his/her choice. |
| DialogInterface.OnCancelListener cancelListener = |
| new DialogInterface.OnCancelListener() { |
| |
| public void onCancel(DialogInterface dialog) { |
| if (false) { |
| Log.d(TAG, "cancelListener.onCancel"); |
| } |
| dialog.dismiss(); |
| finish(); |
| } |
| }; |
| |
| DialogInterface.OnClickListener clickListener = |
| new DialogInterface.OnClickListener() { |
| |
| public void onClick(DialogInterface dialog, int which) { |
| if (false) { |
| Log.d(TAG, "clickListener.onClick " + which); |
| } |
| startActivityHelp(intents[which]); |
| dialog.dismiss(); |
| finish(); |
| } |
| }; |
| |
| DialogInterface.OnClickListener negativeListener = |
| new DialogInterface.OnClickListener() { |
| |
| public void onClick(DialogInterface dialog, int which) { |
| if (false) { |
| Log.d(TAG, "negativeListener.onClick " + |
| which); |
| } |
| dialog.dismiss(); |
| finish(); |
| } |
| }; |
| |
| mAlertDialog = |
| new AlertDialog.Builder(VoiceDialerActivity.this, |
| AlertDialog.THEME_HOLO_DARK) |
| .setTitle(R.string.title) |
| .setItems(sentences, clickListener) |
| .setOnCancelListener(cancelListener) |
| .setNegativeButton(android.R.string.cancel, |
| negativeListener) |
| .show(); |
| |
| waitForChoice(); |
| } |
| } |
| }); |
| } |
| } |
| |
| private class ChoiceRecognizerClient implements RecognizerClient { |
| public void onRecognitionSuccess(final Intent[] intents) { |
| if (false) Log.d(TAG, "ChoiceRecognizerClient onRecognitionSuccess"); |
| if (mState != WAITING_FOR_CHOICE) { |
| if (false) Log.d(TAG, "not waiting for choice, ignoring"); |
| return; |
| } |
| |
| if (mAlertDialog != null) { |
| mAlertDialog.dismiss(); |
| } |
| |
| // disregard all but the first intent. |
| if (intents.length > 0) { |
| String value = intents[0].getStringExtra( |
| RecognizerEngine.SEMANTIC_EXTRA); |
| if (false) Log.d(TAG, "value " + value); |
| if ("R".equals(value)) { |
| if (mUsingBluetooth) { |
| mHandler.post(new GreetingRunnable()); |
| } else { |
| listenForCommand(); |
| } |
| } else if ("X".equals(value)) { |
| exitActivity(); |
| } else { |
| // it's a phone type response |
| mChosenAction = null; |
| for (int i = 0; i < mAvailableChoices.length; i++) { |
| if (value.equalsIgnoreCase( |
| mAvailableChoices[i].getStringExtra( |
| CommandRecognizerEngine.PHONE_TYPE_EXTRA))) { |
| mChosenAction = mAvailableChoices[i]; |
| } |
| } |
| |
| if (mChosenAction != null) { |
| performChoice(); |
| } else { |
| // invalid choice |
| if (false) Log.d(TAG, "invalid choice" + value); |
| |
| if (mUsingBluetooth) { |
| mTtsParams.remove(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID); |
| mTts.speak(getString(R.string.invalid_choice_tts), |
| TextToSpeech.QUEUE_FLUSH, |
| mTtsParams); |
| } |
| waitForChoice(); |
| } |
| } |
| } |
| } |
| |
| public void onRecognitionFailure(String msg) { |
| if (false) Log.d(TAG, "ChoiceRecognizerClient onRecognitionFailure"); |
| exitActivity(); |
| } |
| |
| public void onRecognitionError(String err) { |
| if (false) Log.d(TAG, "ChoiceRecognizerClient onRecognitionError"); |
| mHandler.post(new ErrorRunnable(R.string.recognition_error)); |
| exitActivity(); |
| } |
| |
| public void onMicrophoneStart(InputStream mic) { |
| if (false) Log.d(TAG, "ChoiceRecognizerClient onMicrophoneStart"); |
| } |
| } |
| |
| private void speakChoices() { |
| if (false) Log.d(TAG, "speakChoices"); |
| mState = SPEAKING_CHOICES; |
| |
| String sentenceSpoken = spaceOutDigits( |
| mAvailableChoices[0].getStringExtra( |
| RecognizerEngine.SENTENCE_EXTRA)); |
| |
| // When we have multiple choices, they will be of the form |
| // "call jack jones at home", "call jack jones on mobile". |
| // Speak the entire first sentence, then the last word from each |
| // of the remaining sentences. This will come out to something |
| // like "call jack jones at home mobile or work". |
| StringBuilder builder = new StringBuilder(); |
| builder.append(sentenceSpoken); |
| |
| int count = mAvailableChoices.length; |
| for (int i=1; i < count; i++) { |
| if (i == count-1) { |
| builder.append(" or "); |
| } else { |
| builder.append(" "); |
| } |
| String tmpSentence = mAvailableChoices[i].getStringExtra( |
| RecognizerEngine.SENTENCE_EXTRA); |
| String[] words = tmpSentence.trim().split(" "); |
| builder.append(words[words.length-1]); |
| } |
| mTtsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, |
| CHOICES_UTTERANCE); |
| mTts.speak(builder.toString(), |
| TextToSpeech.QUEUE_ADD, |
| mTtsParams); |
| } |
| |
| |
| private static String spaceOutDigits(String sentenceDisplay) { |
| // if we have a sentence of the form "dial 123 456 7890", |
| // we need to insert a space between each digit, otherwise |
| // the TTS engine will say "dial one hundred twenty three...." |
| // When there already is a space, we also insert a comma, |
| // so that it pauses between sections. For the displayable |
| // sentence "dial 123 456 7890" it will speak |
| // "dial 1 2 3, 4 5 6, 7 8 9 0" |
| char buffer[] = sentenceDisplay.toCharArray(); |
| StringBuilder builder = new StringBuilder(); |
| boolean buildingNumber = false; |
| int l = sentenceDisplay.length(); |
| for (int index = 0; index < l; index++) { |
| char c = buffer[index]; |
| if (Character.isDigit(c)) { |
| if (buildingNumber) { |
| builder.append(" "); |
| } |
| buildingNumber = true; |
| builder.append(c); |
| } else if (c == ' ') { |
| if (buildingNumber) { |
| builder.append(","); |
| } else { |
| builder.append(" "); |
| } |
| } else { |
| buildingNumber = false; |
| builder.append(c); |
| } |
| } |
| return builder.toString(); |
| } |
| |
| private void startActivityHelp(Intent intent) { |
| startActivity(intent); |
| } |
| |
| private void listenForCommand() { |
| if (false) Log.d(TAG, "" |
| + "Command(): MICROPHONE_EXTRA: "+getArg(MICROPHONE_EXTRA)+ |
| ", CONTACTS_EXTRA: "+getArg(CONTACTS_EXTRA)); |
| |
| mState = WAITING_FOR_COMMAND; |
| mRecognizerThread = new Thread() { |
| public void run() { |
| mCommandEngine.recognize(mCommandClient, |
| VoiceDialerActivity.this, |
| newFile(getArg(MICROPHONE_EXTRA)), |
| mSampleRate); |
| } |
| }; |
| mRecognizerThread.start(); |
| } |
| |
| private void listenForChoice() { |
| if (false) Log.d(TAG, "listenForChoice(): MICROPHONE_EXTRA: " + |
| getArg(MICROPHONE_EXTRA)); |
| |
| mState = WAITING_FOR_CHOICE; |
| mRecognizerThread = new Thread() { |
| public void run() { |
| mPhoneTypeChoiceEngine.recognize(mChoiceClient, |
| VoiceDialerActivity.this, |
| newFile(getArg(MICROPHONE_EXTRA)), mSampleRate); |
| } |
| }; |
| mRecognizerThread.start(); |
| } |
| |
| private void exitActivity() { |
| synchronized(this) { |
| if (mState != EXITING) { |
| if (false) Log.d(TAG, "exitActivity"); |
| mState = SPEAKING_GOODBYE; |
| if (mUsingBluetooth) { |
| mTtsParams.put(TextToSpeech.Engine.KEY_PARAM_UTTERANCE_ID, |
| GOODBYE_UTTERANCE); |
| mTts.speak(getString(R.string.goodbye_tts), |
| TextToSpeech.QUEUE_FLUSH, |
| mTtsParams); |
| // Normally, the activity will finish() after the |
| // utterance completes. As a fallback in case the utterance |
| // does not complete, post a delayed runnable finish the |
| // activity. |
| mFallbackRunnable = new OnTtsCompletionRunnable(true); |
| mHandler.postDelayed(mFallbackRunnable, MAX_TTS_DELAY); |
| } else { |
| mHandler.postDelayed(new Runnable() { |
| public void run() { |
| finish(); |
| } |
| }, EXIT_DELAY); |
| } |
| } |
| } |
| } |
| |
| private String getArg(String name) { |
| if (name == null) return null; |
| String arg = getIntent().getStringExtra(name); |
| if (arg != null) return arg; |
| arg = SystemProperties.get("app.voicedialer." + name); |
| return arg != null && arg.length() > 0 ? arg : null; |
| } |
| |
| private static File newFile(String name) { |
| return name != null ? new File(name) : null; |
| } |
| |
| private int playSound(int toneType) { |
| int msecDelay = 1; |
| |
| // use the MediaPlayer to prompt the user |
| if (mToneGenerator != null) { |
| mToneGenerator.startTone(toneType); |
| msecDelay = StrictMath.max(msecDelay, 300); |
| } |
| // use the Vibrator to prompt the user |
| if (mAudioManager != null && |
| mAudioManager.shouldVibrate(AudioManager.VIBRATE_TYPE_RINGER)) { |
| final int VIBRATOR_TIME = 150; |
| final int VIBRATOR_GUARD_TIME = 150; |
| Vibrator vibrator = new Vibrator(); |
| vibrator.vibrate(VIBRATOR_TIME); |
| msecDelay = StrictMath.max(msecDelay, |
| VIBRATOR_TIME + VIBRATOR_GUARD_TIME); |
| } |
| |
| |
| return msecDelay; |
| } |
| |
| protected void onDestroy() { |
| synchronized(this) { |
| mState = EXITING; |
| } |
| |
| if (mAlertDialog != null) { |
| mAlertDialog.dismiss(); |
| } |
| |
| // set the volume back to the level it was before we started. |
| mAudioManager.setStreamVolume(AudioManager.STREAM_BLUETOOTH_SCO, |
| mBluetoothVoiceVolume, 0); |
| mAudioManager.abandonAudioFocus(null); |
| |
| // shut down bluetooth, if it exists |
| if (mBluetoothHeadset != null) { |
| mBluetoothHeadset.stopVoiceRecognition(mBluetoothDevice); |
| mAdapter.closeProfileProxy(BluetoothProfile.HEADSET, mBluetoothHeadset); |
| mBluetoothHeadset = null; |
| } |
| |
| // shut down recognizer and wait for the thread to complete |
| if (mRecognizerThread != null) { |
| mRecognizerThread.interrupt(); |
| try { |
| mRecognizerThread.join(); |
| } catch (InterruptedException e) { |
| if (false) Log.d(TAG, "onStop mRecognizerThread.join exception " + e); |
| } |
| mRecognizerThread = null; |
| } |
| |
| // clean up UI |
| mHandler.removeCallbacks(mMicFlasher); |
| mHandler.removeMessages(0); |
| |
| if (mTts != null) { |
| mTts.stop(); |
| mTts.shutdown(); |
| mTts = null; |
| } |
| unregisterReceiver(mReceiver); |
| |
| super.onDestroy(); |
| |
| releaseWakeLock(); |
| } |
| |
| private void acquireWakeLock(Context context) { |
| if (mWakeLock == null) { |
| PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE); |
| mWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, |
| "VoiceDialer"); |
| mWakeLock.acquire(); |
| } |
| } |
| |
| private void releaseWakeLock() { |
| if (mWakeLock != null) { |
| mWakeLock.release(); |
| mWakeLock = null; |
| } |
| } |
| |
| private Runnable mMicFlasher = new Runnable() { |
| int visible = View.VISIBLE; |
| |
| public void run() { |
| findViewById(R.id.microphone_view).setVisibility(visible); |
| findViewById(R.id.state).setVisibility(visible); |
| visible = visible == View.VISIBLE ? View.INVISIBLE : View.VISIBLE; |
| mHandler.postDelayed(this, 750); |
| } |
| }; |
| } |
