AudioService.java revision dde68c64fd8e97a592633ec4c09283ec928e5697 
1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.media;
18
19import android.app.ActivityManagerNative;
20import android.bluetooth.BluetoothA2dp;
21import android.bluetooth.BluetoothAdapter;
22import android.bluetooth.BluetoothClass;
23import android.bluetooth.BluetoothDevice;
24import android.bluetooth.BluetoothHeadset;
25import android.bluetooth.BluetoothProfile;
26import android.content.BroadcastReceiver;
27import android.content.ComponentName;
28import android.content.ContentResolver;
29import android.content.Context;
30import android.content.Intent;
31import android.content.IntentFilter;
32import android.content.pm.PackageManager;
33import android.database.ContentObserver;
34import android.media.MediaPlayer.OnCompletionListener;
35import android.media.MediaPlayer.OnErrorListener;
36import android.os.Binder;
37import android.os.Environment;
38import android.os.Handler;
39import android.os.IBinder;
40import android.os.Looper;
41import android.os.Message;
42import android.os.RemoteException;
43import android.os.ServiceManager;
44import android.os.SystemProperties;
45import android.provider.Settings;
46import android.provider.Settings.System;
47import android.telephony.PhoneStateListener;
48import android.telephony.TelephonyManager;
49import android.util.Log;
50import android.view.KeyEvent;
51import android.view.VolumePanel;
52
53import com.android.internal.telephony.ITelephony;
54
55import java.io.FileDescriptor;
56import java.io.IOException;
57import java.io.PrintWriter;
58import java.util.ArrayList;
59import java.util.HashMap;
60import java.util.Iterator;
61import java.util.List;
62import java.util.Map;
63import java.util.NoSuchElementException;
64import java.util.Set;
65import java.util.Stack;
66
67/**
68 * The implementation of the volume manager service.
69 * <p>
70 * This implementation focuses on delivering a responsive UI. Most methods are
71 * asynchronous to external calls. For example, the task of setting a volume
72 * will update our internal state, but in a separate thread will set the system
73 * volume and later persist to the database. Similarly, setting the ringer mode
74 * will update the state and broadcast a change and in a separate thread later
75 * persist the ringer mode.
76 *
77 * @hide
78 */
79public class AudioService extends IAudioService.Stub {
80
81    private static final String TAG = "AudioService";
82
83    /** How long to delay before persisting a change in volume/ringer mode. */
84    private static final int PERSIST_DELAY = 3000;
85
86    private Context mContext;
87    private ContentResolver mContentResolver;
88    private boolean mVoiceCapable;
89
90    /** The UI */
91    private VolumePanel mVolumePanel;
92
93    // sendMsg() flags
94    /** Used when a message should be shared across all stream types. */
95    private static final int SHARED_MSG = -1;
96    /** If the msg is already queued, replace it with this one. */
97    private static final int SENDMSG_REPLACE = 0;
98    /** If the msg is already queued, ignore this one and leave the old. */
99    private static final int SENDMSG_NOOP = 1;
100    /** If the msg is already queued, queue this one and leave the old. */
101    private static final int SENDMSG_QUEUE = 2;
102
103    // AudioHandler message.whats
104    private static final int MSG_SET_SYSTEM_VOLUME = 0;
105    private static final int MSG_PERSIST_VOLUME = 1;
106    private static final int MSG_PERSIST_RINGER_MODE = 3;
107    private static final int MSG_PERSIST_VIBRATE_SETTING = 4;
108    private static final int MSG_MEDIA_SERVER_DIED = 5;
109    private static final int MSG_MEDIA_SERVER_STARTED = 6;
110    private static final int MSG_PLAY_SOUND_EFFECT = 7;
111    private static final int MSG_BTA2DP_DOCK_TIMEOUT = 8;
112    private static final int MSG_LOAD_SOUND_EFFECTS = 9;
113
114    private static final int BTA2DP_DOCK_TIMEOUT_MILLIS = 8000;
115
116    /** @see AudioSystemThread */
117    private AudioSystemThread mAudioSystemThread;
118    /** @see AudioHandler */
119    private AudioHandler mAudioHandler;
120    /** @see VolumeStreamState */
121    private VolumeStreamState[] mStreamStates;
122    private SettingsObserver mSettingsObserver;
123
124    private int mMode;
125    private Object mSettingsLock = new Object();
126    private boolean mMediaServerOk;
127
128    private SoundPool mSoundPool;
129    private Object mSoundEffectsLock = new Object();
130    private static final int NUM_SOUNDPOOL_CHANNELS = 4;
131    private static final int SOUND_EFFECT_VOLUME = 1000;
132
133    /* Sound effect file names  */
134    private static final String SOUND_EFFECTS_PATH = "/media/audio/ui/";
135    private static final String[] SOUND_EFFECT_FILES = new String[] {
136        "Effect_Tick.ogg",
137        "KeypressStandard.ogg",
138        "KeypressSpacebar.ogg",
139        "KeypressDelete.ogg",
140        "KeypressReturn.ogg"
141    };
142
143    /* Sound effect file name mapping sound effect id (AudioManager.FX_xxx) to
144     * file index in SOUND_EFFECT_FILES[] (first column) and indicating if effect
145     * uses soundpool (second column) */
146    private int[][] SOUND_EFFECT_FILES_MAP = new int[][] {
147        {0, -1},  // FX_KEY_CLICK
148        {0, -1},  // FX_FOCUS_NAVIGATION_UP
149        {0, -1},  // FX_FOCUS_NAVIGATION_DOWN
150        {0, -1},  // FX_FOCUS_NAVIGATION_LEFT
151        {0, -1},  // FX_FOCUS_NAVIGATION_RIGHT
152        {1, -1},  // FX_KEYPRESS_STANDARD
153        {2, -1},  // FX_KEYPRESS_SPACEBAR
154        {3, -1},  // FX_FOCUS_DELETE
155        {4, -1}   // FX_FOCUS_RETURN
156    };
157
158   /** @hide Maximum volume index values for audio streams */
159    private int[] MAX_STREAM_VOLUME = new int[] {
160        5,  // STREAM_VOICE_CALL
161        7,  // STREAM_SYSTEM
162        7,  // STREAM_RING
163        15, // STREAM_MUSIC
164        7,  // STREAM_ALARM
165        7,  // STREAM_NOTIFICATION
166        15, // STREAM_BLUETOOTH_SCO
167        7,  // STREAM_SYSTEM_ENFORCED
168        15, // STREAM_DTMF
169        15  // STREAM_TTS
170    };
171    /* STREAM_VOLUME_ALIAS[] indicates for each stream if it uses the volume settings
172     * of another stream: This avoids multiplying the volume settings for hidden
173     * stream types that follow other stream behavior for volume settings
174     * NOTE: do not create loops in aliases! */
175    private int[] STREAM_VOLUME_ALIAS = new int[] {
176        AudioSystem.STREAM_VOICE_CALL,  // STREAM_VOICE_CALL
177        AudioSystem.STREAM_SYSTEM,  // STREAM_SYSTEM
178        AudioSystem.STREAM_RING,  // STREAM_RING
179        AudioSystem.STREAM_MUSIC, // STREAM_MUSIC
180        AudioSystem.STREAM_ALARM,  // STREAM_ALARM
181        AudioSystem.STREAM_NOTIFICATION,  // STREAM_NOTIFICATION
182        AudioSystem.STREAM_BLUETOOTH_SCO, // STREAM_BLUETOOTH_SCO
183        AudioSystem.STREAM_SYSTEM,  // STREAM_SYSTEM_ENFORCED
184        AudioSystem.STREAM_VOICE_CALL, // STREAM_DTMF
185        AudioSystem.STREAM_MUSIC  // STREAM_TTS
186    };
187
188    private AudioSystem.ErrorCallback mAudioSystemCallback = new AudioSystem.ErrorCallback() {
189        public void onError(int error) {
190            switch (error) {
191            case AudioSystem.AUDIO_STATUS_SERVER_DIED:
192                if (mMediaServerOk) {
193                    sendMsg(mAudioHandler, MSG_MEDIA_SERVER_DIED, SHARED_MSG, SENDMSG_NOOP, 0, 0,
194                            null, 1500);
195                    mMediaServerOk = false;
196                }
197                break;
198            case AudioSystem.AUDIO_STATUS_OK:
199                if (!mMediaServerOk) {
200                    sendMsg(mAudioHandler, MSG_MEDIA_SERVER_STARTED, SHARED_MSG, SENDMSG_NOOP, 0, 0,
201                            null, 0);
202                    mMediaServerOk = true;
203                }
204                break;
205            default:
206                break;
207            }
208       }
209    };
210
211    /**
212     * Current ringer mode from one of {@link AudioManager#RINGER_MODE_NORMAL},
213     * {@link AudioManager#RINGER_MODE_SILENT}, or
214     * {@link AudioManager#RINGER_MODE_VIBRATE}.
215     */
216    private int mRingerMode;
217
218    /** @see System#MODE_RINGER_STREAMS_AFFECTED */
219    private int mRingerModeAffectedStreams;
220
221    // Streams currently muted by ringer mode
222    private int mRingerModeMutedStreams;
223
224    /** @see System#MUTE_STREAMS_AFFECTED */
225    private int mMuteAffectedStreams;
226
227    /**
228     * Has multiple bits per vibrate type to indicate the type's vibrate
229     * setting. See {@link #setVibrateSetting(int, int)}.
230     * <p>
231     * NOTE: This is not the final decision of whether vibrate is on/off for the
232     * type since it depends on the ringer mode. See {@link #shouldVibrate(int)}.
233     */
234    private int mVibrateSetting;
235
236    /** @see System#NOTIFICATIONS_USE_RING_VOLUME */
237    private int mNotificationsUseRingVolume;
238
239    // Broadcast receiver for device connections intent broadcasts
240    private final BroadcastReceiver mReceiver = new AudioServiceBroadcastReceiver();
241
242    //  Broadcast receiver for media button broadcasts (separate from mReceiver to
243    //  independently change its priority)
244    private final BroadcastReceiver mMediaButtonReceiver = new MediaButtonBroadcastReceiver();
245
246    // Used to alter media button redirection when the phone is ringing.
247    private boolean mIsRinging = false;
248
249    // Devices currently connected
250    private HashMap <Integer, String> mConnectedDevices = new HashMap <Integer, String>();
251
252    // Forced device usage for communications
253    private int mForcedUseForComm;
254
255    // List of binder death handlers for setMode() client processes.
256    // The last process to have called setMode() is at the top of the list.
257    private ArrayList <SetModeDeathHandler> mSetModeDeathHandlers = new ArrayList <SetModeDeathHandler>();
258
259    // List of clients having issued a SCO start request
260    private ArrayList <ScoClient> mScoClients = new ArrayList <ScoClient>();
261
262    // BluetoothHeadset API to control SCO connection
263    private BluetoothHeadset mBluetoothHeadset;
264
265    // Bluetooth headset device
266    private BluetoothDevice mBluetoothHeadsetDevice;
267
268    // Indicate if SCO audio connection is currently active and if the initiator is
269    // audio service (internal) or bluetooth headset (external)
270    private int mScoAudioState;
271    // SCO audio state is not active
272    private static final int SCO_STATE_INACTIVE = 0;
273    // SCO audio state is active or starting due to a local request to start a virtual call
274    private static final int SCO_STATE_ACTIVE_INTERNAL = 1;
275    // SCO audio state is active due to an action in BT handsfree (either voice recognition or
276    // in call audio)
277    private static final int SCO_STATE_ACTIVE_EXTERNAL = 2;
278
279    // true if boot sequence has been completed
280    private boolean mBootCompleted;
281    // listener for SoundPool sample load completion indication
282    private SoundPoolCallback mSoundPoolCallBack;
283    // thread for SoundPool listener
284    private SoundPoolListenerThread mSoundPoolListenerThread;
285    // message looper for SoundPool listener
286    private Looper mSoundPoolLooper = null;
287
288    ///////////////////////////////////////////////////////////////////////////
289    // Construction
290    ///////////////////////////////////////////////////////////////////////////
291
292    /** @hide */
293    public AudioService(Context context) {
294        mContext = context;
295        mContentResolver = context.getContentResolver();
296        mVoiceCapable = mContext.getResources().getBoolean(
297                com.android.internal.R.bool.config_voice_capable);
298
299       // Intialized volume
300        MAX_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL] = SystemProperties.getInt(
301            "ro.config.vc_call_vol_steps",
302           MAX_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL]);
303
304        mVolumePanel = new VolumePanel(context, this);
305        mSettingsObserver = new SettingsObserver();
306        mForcedUseForComm = AudioSystem.FORCE_NONE;
307        createAudioSystemThread();
308        readPersistedSettings();
309        createStreamStates();
310        // Call setMode() to initialize mSetModeDeathHandlers
311        mMode = AudioSystem.MODE_INVALID;
312        setMode(AudioSystem.MODE_NORMAL, null);
313        mMediaServerOk = true;
314
315        // Call setRingerModeInt() to apply correct mute
316        // state on streams affected by ringer mode.
317        mRingerModeMutedStreams = 0;
318        setRingerModeInt(getRingerMode(), false);
319
320        AudioSystem.setErrorCallback(mAudioSystemCallback);
321
322        mBluetoothHeadsetDevice = null;
323        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
324        if (adapter != null) {
325            adapter.getProfileProxy(mContext, mBluetoothProfileServiceListener,
326                                    BluetoothProfile.HEADSET);
327        }
328
329        // Register for device connection intent broadcasts.
330        IntentFilter intentFilter =
331                new IntentFilter(Intent.ACTION_HEADSET_PLUG);
332
333        intentFilter.addAction(BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED);
334        intentFilter.addAction(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED);
335        intentFilter.addAction(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED);
336        intentFilter.addAction(Intent.ACTION_DOCK_EVENT);
337        intentFilter.addAction(Intent.ACTION_USB_ANLG_HEADSET_PLUG);
338        intentFilter.addAction(Intent.ACTION_USB_DGTL_HEADSET_PLUG);
339        intentFilter.addAction(Intent.ACTION_HDMI_AUDIO_PLUG);
340        intentFilter.addAction(Intent.ACTION_BOOT_COMPLETED);
341        context.registerReceiver(mReceiver, intentFilter);
342
343        // Register for media button intent broadcasts.
344        intentFilter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);
345        intentFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
346        context.registerReceiver(mMediaButtonReceiver, intentFilter);
347
348        // Register for phone state monitoring
349        TelephonyManager tmgr = (TelephonyManager)
350                context.getSystemService(Context.TELEPHONY_SERVICE);
351        tmgr.listen(mPhoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
352    }
353
354    private void createAudioSystemThread() {
355        mAudioSystemThread = new AudioSystemThread();
356        mAudioSystemThread.start();
357        waitForAudioHandlerCreation();
358    }
359
360    /** Waits for the volume handler to be created by the other thread. */
361    private void waitForAudioHandlerCreation() {
362        synchronized(this) {
363            while (mAudioHandler == null) {
364                try {
365                    // Wait for mAudioHandler to be set by the other thread
366                    wait();
367                } catch (InterruptedException e) {
368                    Log.e(TAG, "Interrupted while waiting on volume handler.");
369                }
370            }
371        }
372    }
373
374    private void createStreamStates() {
375        int numStreamTypes = AudioSystem.getNumStreamTypes();
376        VolumeStreamState[] streams = mStreamStates = new VolumeStreamState[numStreamTypes];
377
378        for (int i = 0; i < numStreamTypes; i++) {
379            streams[i] = new VolumeStreamState(System.VOLUME_SETTINGS[STREAM_VOLUME_ALIAS[i]], i);
380        }
381
382        // Correct stream index values for streams with aliases
383        for (int i = 0; i < numStreamTypes; i++) {
384            if (STREAM_VOLUME_ALIAS[i] != i) {
385                int index = rescaleIndex(streams[i].mIndex, STREAM_VOLUME_ALIAS[i], i);
386                streams[i].mIndex = streams[i].getValidIndex(index);
387                setStreamVolumeIndex(i, index);
388                index = rescaleIndex(streams[i].mLastAudibleIndex, STREAM_VOLUME_ALIAS[i], i);
389                streams[i].mLastAudibleIndex = streams[i].getValidIndex(index);
390            }
391        }
392    }
393
394    private void readPersistedSettings() {
395        final ContentResolver cr = mContentResolver;
396
397        mRingerMode = System.getInt(cr, System.MODE_RINGER, AudioManager.RINGER_MODE_NORMAL);
398
399        mVibrateSetting = System.getInt(cr, System.VIBRATE_ON, 0);
400
401        mRingerModeAffectedStreams = Settings.System.getInt(cr,
402                Settings.System.MODE_RINGER_STREAMS_AFFECTED,
403                ((1 << AudioSystem.STREAM_RING)|(1 << AudioSystem.STREAM_NOTIFICATION)|
404                 (1 << AudioSystem.STREAM_SYSTEM)|(1 << AudioSystem.STREAM_SYSTEM_ENFORCED)));
405
406        mMuteAffectedStreams = System.getInt(cr,
407                System.MUTE_STREAMS_AFFECTED,
408                ((1 << AudioSystem.STREAM_MUSIC)|(1 << AudioSystem.STREAM_RING)|(1 << AudioSystem.STREAM_SYSTEM)));
409
410        mNotificationsUseRingVolume = System.getInt(cr,
411                Settings.System.NOTIFICATIONS_USE_RING_VOLUME, 1);
412
413        if (mNotificationsUseRingVolume == 1) {
414            STREAM_VOLUME_ALIAS[AudioSystem.STREAM_NOTIFICATION] = AudioSystem.STREAM_RING;
415        }
416        // Each stream will read its own persisted settings
417
418        // Broadcast the sticky intent
419        broadcastRingerMode();
420
421        // Broadcast vibrate settings
422        broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_RINGER);
423        broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_NOTIFICATION);
424    }
425
426    private void setStreamVolumeIndex(int stream, int index) {
427        AudioSystem.setStreamVolumeIndex(stream, (index + 5)/10);
428    }
429
430    private int rescaleIndex(int index, int srcStream, int dstStream) {
431        return (index * mStreamStates[dstStream].getMaxIndex() + mStreamStates[srcStream].getMaxIndex() / 2) / mStreamStates[srcStream].getMaxIndex();
432    }
433
434    ///////////////////////////////////////////////////////////////////////////
435    // IPC methods
436    ///////////////////////////////////////////////////////////////////////////
437
438    /** @see AudioManager#adjustVolume(int, int) */
439    public void adjustVolume(int direction, int flags) {
440        adjustSuggestedStreamVolume(direction, AudioManager.USE_DEFAULT_STREAM_TYPE, flags);
441    }
442
443    /** @see AudioManager#adjustVolume(int, int, int) */
444    public void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags) {
445
446        int streamType = getActiveStreamType(suggestedStreamType);
447
448        // Don't play sound on other streams
449        if (streamType != AudioSystem.STREAM_RING && (flags & AudioManager.FLAG_PLAY_SOUND) != 0) {
450            flags &= ~AudioManager.FLAG_PLAY_SOUND;
451        }
452
453        adjustStreamVolume(streamType, direction, flags);
454    }
455
456    /** @see AudioManager#adjustStreamVolume(int, int, int) */
457    public void adjustStreamVolume(int streamType, int direction, int flags) {
458        ensureValidDirection(direction);
459        ensureValidStreamType(streamType);
460
461
462        VolumeStreamState streamState = mStreamStates[STREAM_VOLUME_ALIAS[streamType]];
463        final int oldIndex = (streamState.muteCount() != 0) ? streamState.mLastAudibleIndex : streamState.mIndex;
464        boolean adjustVolume = true;
465
466        // If either the client forces allowing ringer modes for this adjustment,
467        // or the stream type is one that is affected by ringer modes
468        if ((flags & AudioManager.FLAG_ALLOW_RINGER_MODES) != 0
469                || streamType == AudioSystem.STREAM_RING) {
470            // Check if the ringer mode changes with this volume adjustment. If
471            // it does, it will handle adjusting the volume, so we won't below
472            adjustVolume = checkForRingerModeChange(oldIndex, direction);
473        }
474
475        // If stream is muted, adjust last audible index only
476        int index;
477        if (streamState.muteCount() != 0) {
478            if (adjustVolume) {
479                streamState.adjustLastAudibleIndex(direction);
480                // Post a persist volume msg
481                sendMsg(mAudioHandler, MSG_PERSIST_VOLUME, streamType,
482                        SENDMSG_REPLACE, 0, 1, streamState, PERSIST_DELAY);
483            }
484            index = streamState.mLastAudibleIndex;
485        } else {
486            if (adjustVolume && streamState.adjustIndex(direction)) {
487                // Post message to set system volume (it in turn will post a message
488                // to persist). Do not change volume if stream is muted.
489                sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, STREAM_VOLUME_ALIAS[streamType], SENDMSG_NOOP, 0, 0,
490                        streamState, 0);
491            }
492            index = streamState.mIndex;
493        }
494        // UI
495        mVolumePanel.postVolumeChanged(streamType, flags);
496        // Broadcast Intent
497        sendVolumeUpdate(streamType, oldIndex, index);
498    }
499
500    /** @see AudioManager#setStreamVolume(int, int, int) */
501    public void setStreamVolume(int streamType, int index, int flags) {
502        ensureValidStreamType(streamType);
503        VolumeStreamState streamState = mStreamStates[STREAM_VOLUME_ALIAS[streamType]];
504
505        final int oldIndex = (streamState.muteCount() != 0) ? streamState.mLastAudibleIndex : streamState.mIndex;
506
507        index = rescaleIndex(index * 10, streamType, STREAM_VOLUME_ALIAS[streamType]);
508        setStreamVolumeInt(STREAM_VOLUME_ALIAS[streamType], index, false, true);
509
510        index = (streamState.muteCount() != 0) ? streamState.mLastAudibleIndex : streamState.mIndex;
511
512        // UI, etc.
513        mVolumePanel.postVolumeChanged(streamType, flags);
514        // Broadcast Intent
515        sendVolumeUpdate(streamType, oldIndex, index);
516    }
517
518    private void sendVolumeUpdate(int streamType, int oldIndex, int index) {
519        oldIndex = (oldIndex + 5) / 10;
520        index = (index + 5) / 10;
521
522        Intent intent = new Intent(AudioManager.VOLUME_CHANGED_ACTION);
523        intent.putExtra(AudioManager.EXTRA_VOLUME_STREAM_TYPE, streamType);
524        intent.putExtra(AudioManager.EXTRA_VOLUME_STREAM_VALUE, index);
525        intent.putExtra(AudioManager.EXTRA_PREV_VOLUME_STREAM_VALUE, oldIndex);
526
527        mContext.sendBroadcast(intent);
528    }
529
530    /**
531     * Sets the stream state's index, and posts a message to set system volume.
532     * This will not call out to the UI. Assumes a valid stream type.
533     *
534     * @param streamType Type of the stream
535     * @param index Desired volume index of the stream
536     * @param force If true, set the volume even if the desired volume is same
537     * as the current volume.
538     * @param lastAudible If true, stores new index as last audible one
539     */
540    private void setStreamVolumeInt(int streamType, int index, boolean force, boolean lastAudible) {
541        VolumeStreamState streamState = mStreamStates[streamType];
542
543        // If stream is muted, set last audible index only
544        if (streamState.muteCount() != 0) {
545            // Do not allow last audible index to be 0
546            if (index != 0) {
547                streamState.setLastAudibleIndex(index);
548                // Post a persist volume msg
549                sendMsg(mAudioHandler, MSG_PERSIST_VOLUME, streamType,
550                        SENDMSG_REPLACE, 0, 1, streamState, PERSIST_DELAY);
551            }
552        } else {
553            if (streamState.setIndex(index, lastAudible) || force) {
554                // Post message to set system volume (it in turn will post a message
555                // to persist).
556                sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, streamType, SENDMSG_NOOP, 0, 0,
557                        streamState, 0);
558            }
559        }
560    }
561
562    /** @see AudioManager#setStreamSolo(int, boolean) */
563    public void setStreamSolo(int streamType, boolean state, IBinder cb) {
564        for (int stream = 0; stream < mStreamStates.length; stream++) {
565            if (!isStreamAffectedByMute(stream) || stream == streamType) continue;
566            // Bring back last audible volume
567            mStreamStates[stream].mute(cb, state);
568         }
569    }
570
571    /** @see AudioManager#setStreamMute(int, boolean) */
572    public void setStreamMute(int streamType, boolean state, IBinder cb) {
573        if (isStreamAffectedByMute(streamType)) {
574            mStreamStates[streamType].mute(cb, state);
575        }
576    }
577
578    /** @see AudioManager#getStreamVolume(int) */
579    public int getStreamVolume(int streamType) {
580        ensureValidStreamType(streamType);
581        return (mStreamStates[streamType].mIndex + 5) / 10;
582    }
583
584    /** @see AudioManager#getStreamMaxVolume(int) */
585    public int getStreamMaxVolume(int streamType) {
586        ensureValidStreamType(streamType);
587        return (mStreamStates[streamType].getMaxIndex() + 5) / 10;
588    }
589
590    /** @see AudioManager#getRingerMode() */
591    public int getRingerMode() {
592        return mRingerMode;
593    }
594
595    /** @see AudioManager#setRingerMode(int) */
596    public void setRingerMode(int ringerMode) {
597        synchronized (mSettingsLock) {
598            if (ringerMode != mRingerMode) {
599                setRingerModeInt(ringerMode, true);
600                // Send sticky broadcast
601                broadcastRingerMode();
602            }
603        }
604    }
605
606    private void setRingerModeInt(int ringerMode, boolean persist) {
607        mRingerMode = ringerMode;
608
609        // Mute stream if not previously muted by ringer mode and ringer mode
610        // is not RINGER_MODE_NORMAL and stream is affected by ringer mode.
611        // Unmute stream if previously muted by ringer mode and ringer mode
612        // is RINGER_MODE_NORMAL or stream is not affected by ringer mode.
613        int numStreamTypes = AudioSystem.getNumStreamTypes();
614        for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
615            if (isStreamMutedByRingerMode(streamType)) {
616                if (!isStreamAffectedByRingerMode(streamType) ||
617                    mRingerMode == AudioManager.RINGER_MODE_NORMAL) {
618                    mStreamStates[streamType].mute(null, false);
619                    mRingerModeMutedStreams &= ~(1 << streamType);
620                }
621            } else {
622                if (isStreamAffectedByRingerMode(streamType) &&
623                    mRingerMode != AudioManager.RINGER_MODE_NORMAL) {
624                   mStreamStates[streamType].mute(null, true);
625                   mRingerModeMutedStreams |= (1 << streamType);
626               }
627            }
628        }
629
630        // Post a persist ringer mode msg
631        if (persist) {
632            sendMsg(mAudioHandler, MSG_PERSIST_RINGER_MODE, SHARED_MSG,
633                    SENDMSG_REPLACE, 0, 0, null, PERSIST_DELAY);
634        }
635    }
636
637    /** @see AudioManager#shouldVibrate(int) */
638    public boolean shouldVibrate(int vibrateType) {
639
640        switch (getVibrateSetting(vibrateType)) {
641
642            case AudioManager.VIBRATE_SETTING_ON:
643                return mRingerMode != AudioManager.RINGER_MODE_SILENT;
644
645            case AudioManager.VIBRATE_SETTING_ONLY_SILENT:
646                return mRingerMode == AudioManager.RINGER_MODE_VIBRATE;
647
648            case AudioManager.VIBRATE_SETTING_OFF:
649                // return false, even for incoming calls
650                return false;
651
652            default:
653                return false;
654        }
655    }
656
657    /** @see AudioManager#getVibrateSetting(int) */
658    public int getVibrateSetting(int vibrateType) {
659        return (mVibrateSetting >> (vibrateType * 2)) & 3;
660    }
661
662    /** @see AudioManager#setVibrateSetting(int, int) */
663    public void setVibrateSetting(int vibrateType, int vibrateSetting) {
664
665        mVibrateSetting = getValueForVibrateSetting(mVibrateSetting, vibrateType, vibrateSetting);
666
667        // Broadcast change
668        broadcastVibrateSetting(vibrateType);
669
670        // Post message to set ringer mode (it in turn will post a message
671        // to persist)
672        sendMsg(mAudioHandler, MSG_PERSIST_VIBRATE_SETTING, SHARED_MSG, SENDMSG_NOOP, 0, 0,
673                null, 0);
674    }
675
676    /**
677     * @see #setVibrateSetting(int, int)
678     */
679    public static int getValueForVibrateSetting(int existingValue, int vibrateType,
680            int vibrateSetting) {
681
682        // First clear the existing setting. Each vibrate type has two bits in
683        // the value. Note '3' is '11' in binary.
684        existingValue &= ~(3 << (vibrateType * 2));
685
686        // Set into the old value
687        existingValue |= (vibrateSetting & 3) << (vibrateType * 2);
688
689        return existingValue;
690    }
691
692    private class SetModeDeathHandler implements IBinder.DeathRecipient {
693        private IBinder mCb; // To be notified of client's death
694        private int mMode = AudioSystem.MODE_NORMAL; // Current mode set by this client
695
696        SetModeDeathHandler(IBinder cb) {
697            mCb = cb;
698        }
699
700        public void binderDied() {
701            synchronized(mSetModeDeathHandlers) {
702                Log.w(TAG, "setMode() client died");
703                int index = mSetModeDeathHandlers.indexOf(this);
704                if (index < 0) {
705                    Log.w(TAG, "unregistered setMode() client died");
706                } else {
707                    mSetModeDeathHandlers.remove(this);
708                    // If dead client was a the top of client list,
709                    // apply next mode in the stack
710                    if (index == 0) {
711                        // mSetModeDeathHandlers is never empty as the initial entry
712                        // created when AudioService starts is never removed
713                        SetModeDeathHandler hdlr = mSetModeDeathHandlers.get(0);
714                        int mode = hdlr.getMode();
715                        if (AudioService.this.mMode != mode) {
716                            if (AudioSystem.setPhoneState(mode) == AudioSystem.AUDIO_STATUS_OK) {
717                                AudioService.this.mMode = mode;
718                                if (mode != AudioSystem.MODE_NORMAL) {
719                                    synchronized(mScoClients) {
720                                        checkScoAudioState();
721                                        if (mScoAudioState == SCO_STATE_ACTIVE_EXTERNAL) {
722                                            mBluetoothHeadset.stopVoiceRecognition(
723                                                    mBluetoothHeadsetDevice);
724                                            mBluetoothHeadset.stopScoUsingVirtualVoiceCall(
725                                                    mBluetoothHeadsetDevice);
726                                        } else {
727                                            clearAllScoClients(mCb, true);
728                                        }
729                                    }
730                                }
731                            }
732                        }
733                    }
734                }
735            }
736        }
737
738        public void setMode(int mode) {
739            mMode = mode;
740        }
741
742        public int getMode() {
743            return mMode;
744        }
745
746        public IBinder getBinder() {
747            return mCb;
748        }
749    }
750
751    /** @see AudioManager#setMode(int) */
752    public void setMode(int mode, IBinder cb) {
753        if (!checkAudioSettingsPermission("setMode()")) {
754            return;
755        }
756
757        if (mode < AudioSystem.MODE_CURRENT || mode >= AudioSystem.NUM_MODES) {
758            return;
759        }
760
761        synchronized (mSettingsLock) {
762            if (mode == AudioSystem.MODE_CURRENT) {
763                mode = mMode;
764            }
765            if (mode != mMode) {
766
767                // automatically handle audio focus for mode changes
768                handleFocusForCalls(mMode, mode);
769
770                if (AudioSystem.setPhoneState(mode) == AudioSystem.AUDIO_STATUS_OK) {
771                    mMode = mode;
772
773                    synchronized(mSetModeDeathHandlers) {
774                        SetModeDeathHandler hdlr = null;
775                        Iterator iter = mSetModeDeathHandlers.iterator();
776                        while (iter.hasNext()) {
777                            SetModeDeathHandler h = (SetModeDeathHandler)iter.next();
778                            if (h.getBinder() == cb) {
779                                hdlr = h;
780                                // Remove from client list so that it is re-inserted at top of list
781                                iter.remove();
782                                break;
783                            }
784                        }
785                        if (hdlr == null) {
786                            hdlr = new SetModeDeathHandler(cb);
787                            // cb is null when setMode() is called by AudioService constructor
788                            if (cb != null) {
789                                // Register for client death notification
790                                try {
791                                    cb.linkToDeath(hdlr, 0);
792                                } catch (RemoteException e) {
793                                    // Client has died!
794                                    Log.w(TAG, "setMode() could not link to "+cb+" binder death");
795                                }
796                            }
797                        }
798                        // Last client to call setMode() is always at top of client list
799                        // as required by SetModeDeathHandler.binderDied()
800                        mSetModeDeathHandlers.add(0, hdlr);
801                        hdlr.setMode(mode);
802                    }
803
804                    // when entering RINGTONE, IN_CALL or IN_COMMUNICATION mode, clear all
805                    // SCO connections not started by the application changing the mode
806                    if (mode != AudioSystem.MODE_NORMAL) {
807                        synchronized(mScoClients) {
808                            checkScoAudioState();
809                            if (mScoAudioState == SCO_STATE_ACTIVE_EXTERNAL) {
810                                mBluetoothHeadset.stopVoiceRecognition(mBluetoothHeadsetDevice);
811                                mBluetoothHeadset.stopScoUsingVirtualVoiceCall(
812                                    mBluetoothHeadsetDevice);
813                            } else {
814                                clearAllScoClients(cb, true);
815                            }
816                        }
817                    }
818                }
819            }
820            int streamType = getActiveStreamType(AudioManager.USE_DEFAULT_STREAM_TYPE);
821            int index = mStreamStates[STREAM_VOLUME_ALIAS[streamType]].mIndex;
822            setStreamVolumeInt(STREAM_VOLUME_ALIAS[streamType], index, true, false);
823        }
824    }
825
826    /** pre-condition: oldMode != newMode */
827    private void handleFocusForCalls(int oldMode, int newMode) {
828        // if ringing
829        if (newMode == AudioSystem.MODE_RINGTONE) {
830            // if not ringing silently
831            int ringVolume = AudioService.this.getStreamVolume(AudioManager.STREAM_RING);
832            if (ringVolume > 0) {
833                // request audio focus for the communication focus entry
834                requestAudioFocus(AudioManager.STREAM_RING,
835                        AudioManager.AUDIOFOCUS_GAIN_TRANSIENT,
836                        null, null /* both allowed to be null only for this clientId */,
837                        IN_VOICE_COMM_FOCUS_ID /*clientId*/);
838
839            }
840        }
841        // if entering call
842        else if ((newMode == AudioSystem.MODE_IN_CALL)
843                || (newMode == AudioSystem.MODE_IN_COMMUNICATION)) {
844            // request audio focus for the communication focus entry
845            // (it's ok if focus was already requested during ringing)
846            requestAudioFocus(AudioManager.STREAM_RING,
847                    AudioManager.AUDIOFOCUS_GAIN_TRANSIENT,
848                    null, null /* both allowed to be null only for this clientId */,
849                    IN_VOICE_COMM_FOCUS_ID /*clientId*/);
850        }
851        // if exiting call
852        else if (newMode == AudioSystem.MODE_NORMAL) {
853            // abandon audio focus for communication focus entry
854            abandonAudioFocus(null, IN_VOICE_COMM_FOCUS_ID);
855        }
856    }
857
858    /** @see AudioManager#getMode() */
859    public int getMode() {
860        return mMode;
861    }
862
863    /** @see AudioManager#playSoundEffect(int) */
864    public void playSoundEffect(int effectType) {
865        sendMsg(mAudioHandler, MSG_PLAY_SOUND_EFFECT, SHARED_MSG, SENDMSG_NOOP,
866                effectType, -1, null, 0);
867    }
868
869    /** @see AudioManager#playSoundEffect(int, float) */
870    public void playSoundEffectVolume(int effectType, float volume) {
871        loadSoundEffects();
872        sendMsg(mAudioHandler, MSG_PLAY_SOUND_EFFECT, SHARED_MSG, SENDMSG_NOOP,
873                effectType, (int) (volume * 1000), null, 0);
874    }
875
876    /**
877     * Loads samples into the soundpool.
878     * This method must be called at when sound effects are enabled
879     */
880    public boolean loadSoundEffects() {
881        int status;
882
883        synchronized (mSoundEffectsLock) {
884            if (!mBootCompleted) {
885                Log.w(TAG, "loadSoundEffects() called before boot complete");
886                return false;
887            }
888
889            if (mSoundPool != null) {
890                return true;
891            }
892            mSoundPool = new SoundPool(NUM_SOUNDPOOL_CHANNELS, AudioSystem.STREAM_SYSTEM, 0);
893            if (mSoundPool == null) {
894                Log.w(TAG, "loadSoundEffects() could not allocate sound pool");
895                return false;
896            }
897
898            try {
899                mSoundPoolCallBack = null;
900                mSoundPoolListenerThread = new SoundPoolListenerThread();
901                mSoundPoolListenerThread.start();
902                // Wait for mSoundPoolCallBack to be set by the other thread
903                mSoundEffectsLock.wait();
904            } catch (InterruptedException e) {
905                Log.w(TAG, "Interrupted while waiting sound pool listener thread.");
906            }
907
908            if (mSoundPoolCallBack == null) {
909                Log.w(TAG, "loadSoundEffects() could not create SoundPool listener or thread");
910                if (mSoundPoolLooper != null) {
911                    mSoundPoolLooper.quit();
912                    mSoundPoolLooper = null;
913                }
914                mSoundPoolListenerThread = null;
915                mSoundPool.release();
916                mSoundPool = null;
917                return false;
918            }
919            /*
920             * poolId table: The value -1 in this table indicates that corresponding
921             * file (same index in SOUND_EFFECT_FILES[] has not been loaded.
922             * Once loaded, the value in poolId is the sample ID and the same
923             * sample can be reused for another effect using the same file.
924             */
925            int[] poolId = new int[SOUND_EFFECT_FILES.length];
926            for (int fileIdx = 0; fileIdx < SOUND_EFFECT_FILES.length; fileIdx++) {
927                poolId[fileIdx] = -1;
928            }
929            /*
930             * Effects whose value in SOUND_EFFECT_FILES_MAP[effect][1] is -1 must be loaded.
931             * If load succeeds, value in SOUND_EFFECT_FILES_MAP[effect][1] is > 0:
932             * this indicates we have a valid sample loaded for this effect.
933             */
934
935            int lastSample = 0;
936            for (int effect = 0; effect < AudioManager.NUM_SOUND_EFFECTS; effect++) {
937                // Do not load sample if this effect uses the MediaPlayer
938                if (SOUND_EFFECT_FILES_MAP[effect][1] == 0) {
939                    continue;
940                }
941                if (poolId[SOUND_EFFECT_FILES_MAP[effect][0]] == -1) {
942                    String filePath = Environment.getRootDirectory()
943                            + SOUND_EFFECTS_PATH
944                            + SOUND_EFFECT_FILES[SOUND_EFFECT_FILES_MAP[effect][0]];
945                    int sampleId = mSoundPool.load(filePath, 0);
946                    if (sampleId <= 0) {
947                        Log.w(TAG, "Soundpool could not load file: "+filePath);
948                    } else {
949                        SOUND_EFFECT_FILES_MAP[effect][1] = sampleId;
950                        poolId[SOUND_EFFECT_FILES_MAP[effect][0]] = sampleId;
951                        lastSample = sampleId;
952                    }
953                } else {
954                    SOUND_EFFECT_FILES_MAP[effect][1] = poolId[SOUND_EFFECT_FILES_MAP[effect][0]];
955                }
956            }
957            // wait for all samples to be loaded
958            if (lastSample != 0) {
959                mSoundPoolCallBack.setLastSample(lastSample);
960
961                try {
962                    mSoundEffectsLock.wait();
963                    status = mSoundPoolCallBack.status();
964                } catch (java.lang.InterruptedException e) {
965                    Log.w(TAG, "Interrupted while waiting sound pool callback.");
966                    status = -1;
967                }
968            } else {
969                status = -1;
970            }
971
972            if (mSoundPoolLooper != null) {
973                mSoundPoolLooper.quit();
974                mSoundPoolLooper = null;
975            }
976            mSoundPoolListenerThread = null;
977            if (status != 0) {
978                Log.w(TAG,
979                        "loadSoundEffects(), Error "
980                                + ((lastSample != 0) ? mSoundPoolCallBack.status() : -1)
981                                + " while loading samples");
982                for (int effect = 0; effect < AudioManager.NUM_SOUND_EFFECTS; effect++) {
983                    if (SOUND_EFFECT_FILES_MAP[effect][1] > 0) {
984                        SOUND_EFFECT_FILES_MAP[effect][1] = -1;
985                    }
986                }
987
988                mSoundPool.release();
989                mSoundPool = null;
990            }
991        }
992        return (status == 0);
993    }
994
995    /**
996     *  Unloads samples from the sound pool.
997     *  This method can be called to free some memory when
998     *  sound effects are disabled.
999     */
1000    public void unloadSoundEffects() {
1001        synchronized (mSoundEffectsLock) {
1002            if (mSoundPool == null) {
1003                return;
1004            }
1005
1006            mAudioHandler.removeMessages(MSG_LOAD_SOUND_EFFECTS);
1007            mAudioHandler.removeMessages(MSG_PLAY_SOUND_EFFECT);
1008
1009            int[] poolId = new int[SOUND_EFFECT_FILES.length];
1010            for (int fileIdx = 0; fileIdx < SOUND_EFFECT_FILES.length; fileIdx++) {
1011                poolId[fileIdx] = 0;
1012            }
1013
1014            for (int effect = 0; effect < AudioManager.NUM_SOUND_EFFECTS; effect++) {
1015                if (SOUND_EFFECT_FILES_MAP[effect][1] <= 0) {
1016                    continue;
1017                }
1018                if (poolId[SOUND_EFFECT_FILES_MAP[effect][0]] == 0) {
1019                    mSoundPool.unload(SOUND_EFFECT_FILES_MAP[effect][1]);
1020                    SOUND_EFFECT_FILES_MAP[effect][1] = -1;
1021                    poolId[SOUND_EFFECT_FILES_MAP[effect][0]] = -1;
1022                }
1023            }
1024            mSoundPool.release();
1025            mSoundPool = null;
1026        }
1027    }
1028
1029    class SoundPoolListenerThread extends Thread {
1030        public SoundPoolListenerThread() {
1031            super("SoundPoolListenerThread");
1032        }
1033
1034        @Override
1035        public void run() {
1036
1037            Looper.prepare();
1038            mSoundPoolLooper = Looper.myLooper();
1039
1040            synchronized (mSoundEffectsLock) {
1041                if (mSoundPool != null) {
1042                    mSoundPoolCallBack = new SoundPoolCallback();
1043                    mSoundPool.setOnLoadCompleteListener(mSoundPoolCallBack);
1044                }
1045                mSoundEffectsLock.notify();
1046            }
1047            Looper.loop();
1048        }
1049    }
1050
1051    private final class SoundPoolCallback implements
1052            android.media.SoundPool.OnLoadCompleteListener {
1053
1054        int mStatus;
1055        int mLastSample;
1056
1057        public int status() {
1058            return mStatus;
1059        }
1060
1061        public void setLastSample(int sample) {
1062            mLastSample = sample;
1063        }
1064
1065        public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
1066            synchronized (mSoundEffectsLock) {
1067                if (status != 0) {
1068                    mStatus = status;
1069                }
1070                if (sampleId == mLastSample) {
1071                    mSoundEffectsLock.notify();
1072                }
1073            }
1074        }
1075    }
1076
1077    /** @see AudioManager#reloadAudioSettings() */
1078    public void reloadAudioSettings() {
1079        // restore ringer mode, ringer mode affected streams, mute affected streams and vibrate settings
1080        readPersistedSettings();
1081
1082        // restore volume settings
1083        int numStreamTypes = AudioSystem.getNumStreamTypes();
1084        for (int streamType = 0; streamType < numStreamTypes; streamType++) {
1085            VolumeStreamState streamState = mStreamStates[streamType];
1086
1087            String settingName = System.VOLUME_SETTINGS[STREAM_VOLUME_ALIAS[streamType]];
1088            String lastAudibleSettingName = settingName + System.APPEND_FOR_LAST_AUDIBLE;
1089            int index = Settings.System.getInt(mContentResolver,
1090                                           settingName,
1091                                           AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
1092            if (STREAM_VOLUME_ALIAS[streamType] != streamType) {
1093                index = rescaleIndex(index * 10, STREAM_VOLUME_ALIAS[streamType], streamType);
1094            } else {
1095                index *= 10;
1096            }
1097            streamState.mIndex = streamState.getValidIndex(index);
1098
1099            index = (index + 5) / 10;
1100            index = Settings.System.getInt(mContentResolver,
1101                                            lastAudibleSettingName,
1102                                            (index > 0) ? index : AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
1103            if (STREAM_VOLUME_ALIAS[streamType] != streamType) {
1104                index = rescaleIndex(index * 10, STREAM_VOLUME_ALIAS[streamType], streamType);
1105            } else {
1106                index *= 10;
1107            }
1108            streamState.mLastAudibleIndex = streamState.getValidIndex(index);
1109
1110            // unmute stream that was muted but is not affect by mute anymore
1111            if (streamState.muteCount() != 0 && !isStreamAffectedByMute(streamType)) {
1112                int size = streamState.mDeathHandlers.size();
1113                for (int i = 0; i < size; i++) {
1114                    streamState.mDeathHandlers.get(i).mMuteCount = 1;
1115                    streamState.mDeathHandlers.get(i).mute(false);
1116                }
1117            }
1118            // apply stream volume
1119            if (streamState.muteCount() == 0) {
1120                setStreamVolumeIndex(streamType, streamState.mIndex);
1121            }
1122        }
1123
1124        // apply new ringer mode
1125        setRingerModeInt(getRingerMode(), false);
1126    }
1127
1128    /** @see AudioManager#setSpeakerphoneOn() */
1129    public void setSpeakerphoneOn(boolean on){
1130        if (!checkAudioSettingsPermission("setSpeakerphoneOn()")) {
1131            return;
1132        }
1133        if (on) {
1134            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_SPEAKER);
1135            mForcedUseForComm = AudioSystem.FORCE_SPEAKER;
1136        } else {
1137            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_NONE);
1138            mForcedUseForComm = AudioSystem.FORCE_NONE;
1139        }
1140    }
1141
1142    /** @see AudioManager#isSpeakerphoneOn() */
1143    public boolean isSpeakerphoneOn() {
1144        if (mForcedUseForComm == AudioSystem.FORCE_SPEAKER) {
1145            return true;
1146        } else {
1147            return false;
1148        }
1149    }
1150
1151    /** @see AudioManager#setBluetoothScoOn() */
1152    public void setBluetoothScoOn(boolean on){
1153        if (!checkAudioSettingsPermission("setBluetoothScoOn()")) {
1154            return;
1155        }
1156        if (on) {
1157            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_BT_SCO);
1158            AudioSystem.setForceUse(AudioSystem.FOR_RECORD, AudioSystem.FORCE_BT_SCO);
1159            mForcedUseForComm = AudioSystem.FORCE_BT_SCO;
1160        } else {
1161            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_NONE);
1162            AudioSystem.setForceUse(AudioSystem.FOR_RECORD, AudioSystem.FORCE_NONE);
1163            mForcedUseForComm = AudioSystem.FORCE_NONE;
1164        }
1165    }
1166
1167    /** @see AudioManager#isBluetoothScoOn() */
1168    public boolean isBluetoothScoOn() {
1169        if (mForcedUseForComm == AudioSystem.FORCE_BT_SCO) {
1170            return true;
1171        } else {
1172            return false;
1173        }
1174    }
1175
1176    /** @see AudioManager#startBluetoothSco() */
1177    public void startBluetoothSco(IBinder cb){
1178        if (!checkAudioSettingsPermission("startBluetoothSco()")) {
1179            return;
1180        }
1181        ScoClient client = getScoClient(cb);
1182        client.incCount();
1183    }
1184
1185    /** @see AudioManager#stopBluetoothSco() */
1186    public void stopBluetoothSco(IBinder cb){
1187        if (!checkAudioSettingsPermission("stopBluetoothSco()")) {
1188            return;
1189        }
1190        ScoClient client = getScoClient(cb);
1191        client.decCount();
1192    }
1193
1194    private class ScoClient implements IBinder.DeathRecipient {
1195        private IBinder mCb; // To be notified of client's death
1196        private int mStartcount; // number of SCO connections started by this client
1197
1198        ScoClient(IBinder cb) {
1199            mCb = cb;
1200            mStartcount = 0;
1201        }
1202
1203        public void binderDied() {
1204            synchronized(mScoClients) {
1205                Log.w(TAG, "SCO client died");
1206                int index = mScoClients.indexOf(this);
1207                if (index < 0) {
1208                    Log.w(TAG, "unregistered SCO client died");
1209                } else {
1210                    clearCount(true);
1211                    mScoClients.remove(this);
1212                }
1213            }
1214        }
1215
1216        public void incCount() {
1217            synchronized(mScoClients) {
1218                requestScoState(BluetoothHeadset.STATE_AUDIO_CONNECTED);
1219                if (mStartcount == 0) {
1220                    try {
1221                        mCb.linkToDeath(this, 0);
1222                    } catch (RemoteException e) {
1223                        // client has already died!
1224                        Log.w(TAG, "ScoClient  incCount() could not link to "+mCb+" binder death");
1225                    }
1226                }
1227                mStartcount++;
1228            }
1229        }
1230
1231        public void decCount() {
1232            synchronized(mScoClients) {
1233                if (mStartcount == 0) {
1234                    Log.w(TAG, "ScoClient.decCount() already 0");
1235                } else {
1236                    mStartcount--;
1237                    if (mStartcount == 0) {
1238                        try {
1239                            mCb.unlinkToDeath(this, 0);
1240                        } catch (NoSuchElementException e) {
1241                            Log.w(TAG, "decCount() going to 0 but not registered to binder");
1242                        }
1243                    }
1244                    requestScoState(BluetoothHeadset.STATE_AUDIO_DISCONNECTED);
1245                }
1246            }
1247        }
1248
1249        public void clearCount(boolean stopSco) {
1250            synchronized(mScoClients) {
1251                if (mStartcount != 0) {
1252                    try {
1253                        mCb.unlinkToDeath(this, 0);
1254                    } catch (NoSuchElementException e) {
1255                        Log.w(TAG, "clearCount() mStartcount: "+mStartcount+" != 0 but not registered to binder");
1256                    }
1257                }
1258                mStartcount = 0;
1259                if (stopSco) {
1260                    requestScoState(BluetoothHeadset.STATE_AUDIO_DISCONNECTED);
1261                }
1262            }
1263        }
1264
1265        public int getCount() {
1266            return mStartcount;
1267        }
1268
1269        public IBinder getBinder() {
1270            return mCb;
1271        }
1272
1273        public int totalCount() {
1274            synchronized(mScoClients) {
1275                int count = 0;
1276                int size = mScoClients.size();
1277                for (int i = 0; i < size; i++) {
1278                    count += mScoClients.get(i).getCount();
1279                }
1280                return count;
1281            }
1282        }
1283
1284        private void requestScoState(int state) {
1285            if (mBluetoothHeadset == null) {
1286                return;
1287            }
1288
1289            checkScoAudioState();
1290
1291            if (totalCount() == 0 &&
1292                mBluetoothHeadsetDevice != null) {
1293                // Accept SCO audio activation only in NORMAL audio mode or if the mode is
1294                // currently controlled by the same client.
1295                if ((AudioService.this.mMode == AudioSystem.MODE_NORMAL ||
1296                        mSetModeDeathHandlers.get(0).getBinder() == mCb) &&
1297                        state == BluetoothHeadset.STATE_AUDIO_CONNECTED &&
1298                        mScoAudioState == SCO_STATE_INACTIVE) {
1299                    mScoAudioState = SCO_STATE_ACTIVE_INTERNAL;
1300                    mBluetoothHeadset.startScoUsingVirtualVoiceCall(mBluetoothHeadsetDevice);
1301                } else if (state == BluetoothHeadset.STATE_AUDIO_DISCONNECTED &&
1302                        mScoAudioState == SCO_STATE_ACTIVE_INTERNAL){
1303                    mBluetoothHeadset.stopScoUsingVirtualVoiceCall(mBluetoothHeadsetDevice);
1304                }
1305            }
1306        }
1307    }
1308
1309    private void checkScoAudioState() {
1310        if (mBluetoothHeadset != null && mBluetoothHeadsetDevice != null &&
1311                mScoAudioState != SCO_STATE_ACTIVE_INTERNAL &&
1312                mBluetoothHeadset.getAudioState(mBluetoothHeadsetDevice)
1313                != BluetoothHeadset.STATE_AUDIO_DISCONNECTED) {
1314            mScoAudioState = SCO_STATE_ACTIVE_EXTERNAL;
1315        }
1316    }
1317
1318    public ScoClient getScoClient(IBinder cb) {
1319        synchronized(mScoClients) {
1320            ScoClient client;
1321            int size = mScoClients.size();
1322            for (int i = 0; i < size; i++) {
1323                client = mScoClients.get(i);
1324                if (client.getBinder() == cb)
1325                    return client;
1326            }
1327            client = new ScoClient(cb);
1328            mScoClients.add(client);
1329            return client;
1330        }
1331    }
1332
1333    public void clearAllScoClients(IBinder exceptBinder, boolean stopSco) {
1334        synchronized(mScoClients) {
1335            int size = mScoClients.size();
1336            for (int i = 0; i < size; i++) {
1337                if (mScoClients.get(i).getBinder() != exceptBinder)
1338                    mScoClients.get(i).clearCount(stopSco);
1339            }
1340        }
1341    }
1342
1343    private BluetoothProfile.ServiceListener mBluetoothProfileServiceListener =
1344        new BluetoothProfile.ServiceListener() {
1345        public void onServiceConnected(int profile, BluetoothProfile proxy) {
1346            synchronized (mScoClients) {
1347                mBluetoothHeadset = (BluetoothHeadset) proxy;
1348                List<BluetoothDevice> deviceList = mBluetoothHeadset.getConnectedDevices();
1349                if (deviceList.size() > 0) {
1350                    mBluetoothHeadsetDevice = deviceList.get(0);
1351                } else {
1352                    mBluetoothHeadsetDevice = null;
1353                }
1354            }
1355        }
1356        public void onServiceDisconnected(int profile) {
1357            synchronized (mScoClients) {
1358                if (mBluetoothHeadset != null) {
1359                    List<BluetoothDevice> devices = mBluetoothHeadset.getConnectedDevices();
1360                    if (devices.size() == 0) {
1361                        mBluetoothHeadsetDevice = null;
1362                        clearAllScoClients(null, false);
1363                        mScoAudioState = SCO_STATE_INACTIVE;
1364                    }
1365                    mBluetoothHeadset = null;
1366                }
1367            }
1368        }
1369    };
1370
1371    ///////////////////////////////////////////////////////////////////////////
1372    // Internal methods
1373    ///////////////////////////////////////////////////////////////////////////
1374
1375    /**
1376     * Checks if the adjustment should change ringer mode instead of just
1377     * adjusting volume. If so, this will set the proper ringer mode and volume
1378     * indices on the stream states.
1379     */
1380    private boolean checkForRingerModeChange(int oldIndex, int direction) {
1381        boolean adjustVolumeIndex = true;
1382        int newRingerMode = mRingerMode;
1383
1384        if (mRingerMode == AudioManager.RINGER_MODE_NORMAL) {
1385            // audible mode, at the bottom of the scale
1386            if (direction == AudioManager.ADJUST_LOWER
1387                    && (oldIndex + 5) / 10 == 1) {
1388                // "silent mode", but which one?
1389                newRingerMode = System.getInt(mContentResolver, System.VIBRATE_IN_SILENT, 1) == 1
1390                    ? AudioManager.RINGER_MODE_VIBRATE
1391                    : AudioManager.RINGER_MODE_SILENT;
1392            }
1393        } else {
1394            if (direction == AudioManager.ADJUST_RAISE) {
1395                // exiting silent mode
1396                newRingerMode = AudioManager.RINGER_MODE_NORMAL;
1397            } else {
1398                // prevent last audible index to reach 0
1399                adjustVolumeIndex = false;
1400            }
1401        }
1402
1403        if (newRingerMode != mRingerMode) {
1404            setRingerMode(newRingerMode);
1405
1406            /*
1407             * If we are changing ringer modes, do not increment/decrement the
1408             * volume index. Instead, the handler for the message above will
1409             * take care of changing the index.
1410             */
1411            adjustVolumeIndex = false;
1412        }
1413
1414        return adjustVolumeIndex;
1415    }
1416
1417    public boolean isStreamAffectedByRingerMode(int streamType) {
1418        return (mRingerModeAffectedStreams & (1 << streamType)) != 0;
1419    }
1420
1421    private boolean isStreamMutedByRingerMode(int streamType) {
1422        return (mRingerModeMutedStreams & (1 << streamType)) != 0;
1423    }
1424
1425    public boolean isStreamAffectedByMute(int streamType) {
1426        return (mMuteAffectedStreams & (1 << streamType)) != 0;
1427    }
1428
1429    private void ensureValidDirection(int direction) {
1430        if (direction < AudioManager.ADJUST_LOWER || direction > AudioManager.ADJUST_RAISE) {
1431            throw new IllegalArgumentException("Bad direction " + direction);
1432        }
1433    }
1434
1435    private void ensureValidStreamType(int streamType) {
1436        if (streamType < 0 || streamType >= mStreamStates.length) {
1437            throw new IllegalArgumentException("Bad stream type " + streamType);
1438        }
1439    }
1440
1441    private int getActiveStreamType(int suggestedStreamType) {
1442        boolean isOffhook = false;
1443        try {
1444            ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
1445            if (phone != null) isOffhook = phone.isOffhook();
1446        } catch (RemoteException e) {
1447            Log.w(TAG, "Couldn't connect to phone service", e);
1448        }
1449
1450        if (AudioSystem.getForceUse(AudioSystem.FOR_COMMUNICATION) == AudioSystem.FORCE_BT_SCO) {
1451            // Log.v(TAG, "getActiveStreamType: Forcing STREAM_BLUETOOTH_SCO...");
1452            return AudioSystem.STREAM_BLUETOOTH_SCO;
1453        } else if (isOffhook || AudioSystem.isStreamActive(AudioSystem.STREAM_VOICE_CALL)) {
1454            // Log.v(TAG, "getActiveStreamType: Forcing STREAM_VOICE_CALL...");
1455            return AudioSystem.STREAM_VOICE_CALL;
1456        } else if (AudioSystem.isStreamActive(AudioSystem.STREAM_MUSIC)) {
1457            // Log.v(TAG, "getActiveStreamType: Forcing STREAM_MUSIC...");
1458            return AudioSystem.STREAM_MUSIC;
1459        } else if (suggestedStreamType == AudioManager.USE_DEFAULT_STREAM_TYPE) {
1460            if (mVoiceCapable) {
1461                // Log.v(TAG, "getActiveStreamType: Forcing STREAM_RING..."
1462                //        + " b/c USE_DEFAULT_STREAM_TYPE...");
1463                return AudioSystem.STREAM_RING;
1464            } else {
1465                // Log.v(TAG, "getActiveStreamType: Forcing STREAM_MUSIC "
1466                //        + " b/c USE_DEFAULT_STREAM_TYPE...");
1467                return AudioSystem.STREAM_MUSIC;
1468            }
1469        } else {
1470            // Log.v(TAG, "getActiveStreamType: Returning suggested type " + suggestedStreamType);
1471            return suggestedStreamType;
1472        }
1473    }
1474
1475    private void broadcastRingerMode() {
1476        // Send sticky broadcast
1477        Intent broadcast = new Intent(AudioManager.RINGER_MODE_CHANGED_ACTION);
1478        broadcast.putExtra(AudioManager.EXTRA_RINGER_MODE, mRingerMode);
1479        broadcast.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT
1480                | Intent.FLAG_RECEIVER_REPLACE_PENDING);
1481        long origCallerIdentityToken = Binder.clearCallingIdentity();
1482        mContext.sendStickyBroadcast(broadcast);
1483        Binder.restoreCallingIdentity(origCallerIdentityToken);
1484    }
1485
1486    private void broadcastVibrateSetting(int vibrateType) {
1487        // Send broadcast
1488        if (ActivityManagerNative.isSystemReady()) {
1489            Intent broadcast = new Intent(AudioManager.VIBRATE_SETTING_CHANGED_ACTION);
1490            broadcast.putExtra(AudioManager.EXTRA_VIBRATE_TYPE, vibrateType);
1491            broadcast.putExtra(AudioManager.EXTRA_VIBRATE_SETTING, getVibrateSetting(vibrateType));
1492            mContext.sendBroadcast(broadcast);
1493        }
1494    }
1495
1496    // Message helper methods
1497    private static int getMsg(int baseMsg, int streamType) {
1498        return (baseMsg & 0xffff) | streamType << 16;
1499    }
1500
1501    private static int getMsgBase(int msg) {
1502        return msg & 0xffff;
1503    }
1504
1505    private static void sendMsg(Handler handler, int baseMsg, int streamType,
1506            int existingMsgPolicy, int arg1, int arg2, Object obj, int delay) {
1507        int msg = (streamType == SHARED_MSG) ? baseMsg : getMsg(baseMsg, streamType);
1508
1509        if (existingMsgPolicy == SENDMSG_REPLACE) {
1510            handler.removeMessages(msg);
1511        } else if (existingMsgPolicy == SENDMSG_NOOP && handler.hasMessages(msg)) {
1512            return;
1513        }
1514
1515        handler
1516                .sendMessageDelayed(handler.obtainMessage(msg, arg1, arg2, obj), delay);
1517    }
1518
1519    boolean checkAudioSettingsPermission(String method) {
1520        if (mContext.checkCallingOrSelfPermission("android.permission.MODIFY_AUDIO_SETTINGS")
1521                == PackageManager.PERMISSION_GRANTED) {
1522            return true;
1523        }
1524        String msg = "Audio Settings Permission Denial: " + method + " from pid="
1525                + Binder.getCallingPid()
1526                + ", uid=" + Binder.getCallingUid();
1527        Log.w(TAG, msg);
1528        return false;
1529    }
1530
1531
1532    ///////////////////////////////////////////////////////////////////////////
1533    // Inner classes
1534    ///////////////////////////////////////////////////////////////////////////
1535
1536    public class VolumeStreamState {
1537        private final int mStreamType;
1538
1539        private String mVolumeIndexSettingName;
1540        private String mLastAudibleVolumeIndexSettingName;
1541        private int mIndexMax;
1542        private int mIndex;
1543        private int mLastAudibleIndex;
1544        private ArrayList<VolumeDeathHandler> mDeathHandlers; //handles mute/solo requests client death
1545
1546        private VolumeStreamState(String settingName, int streamType) {
1547
1548            setVolumeIndexSettingName(settingName);
1549
1550            mStreamType = streamType;
1551
1552            final ContentResolver cr = mContentResolver;
1553            mIndexMax = MAX_STREAM_VOLUME[streamType];
1554            mIndex = Settings.System.getInt(cr,
1555                                            mVolumeIndexSettingName,
1556                                            AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
1557            mLastAudibleIndex = Settings.System.getInt(cr,
1558                                                       mLastAudibleVolumeIndexSettingName,
1559                                                       (mIndex > 0) ? mIndex : AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
1560            AudioSystem.initStreamVolume(streamType, 0, mIndexMax);
1561            mIndexMax *= 10;
1562            mIndex = getValidIndex(10 * mIndex);
1563            mLastAudibleIndex = getValidIndex(10 * mLastAudibleIndex);
1564            setStreamVolumeIndex(streamType, mIndex);
1565            mDeathHandlers = new ArrayList<VolumeDeathHandler>();
1566        }
1567
1568        public void setVolumeIndexSettingName(String settingName) {
1569            mVolumeIndexSettingName = settingName;
1570            mLastAudibleVolumeIndexSettingName = settingName + System.APPEND_FOR_LAST_AUDIBLE;
1571        }
1572
1573        public boolean adjustIndex(int deltaIndex) {
1574            return setIndex(mIndex + deltaIndex * 10, true);
1575        }
1576
1577        public boolean setIndex(int index, boolean lastAudible) {
1578            int oldIndex = mIndex;
1579            mIndex = getValidIndex(index);
1580
1581            if (oldIndex != mIndex) {
1582                if (lastAudible) {
1583                    mLastAudibleIndex = mIndex;
1584                }
1585                // Apply change to all streams using this one as alias
1586                int numStreamTypes = AudioSystem.getNumStreamTypes();
1587                for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
1588                    if (streamType != mStreamType && STREAM_VOLUME_ALIAS[streamType] == mStreamType) {
1589                        mStreamStates[streamType].setIndex(rescaleIndex(mIndex, mStreamType, streamType), lastAudible);
1590                    }
1591                }
1592                return true;
1593            } else {
1594                return false;
1595            }
1596        }
1597
1598        public void setLastAudibleIndex(int index) {
1599            mLastAudibleIndex = getValidIndex(index);
1600        }
1601
1602        public void adjustLastAudibleIndex(int deltaIndex) {
1603            setLastAudibleIndex(mLastAudibleIndex + deltaIndex * 10);
1604        }
1605
1606        public int getMaxIndex() {
1607            return mIndexMax;
1608        }
1609
1610        public void mute(IBinder cb, boolean state) {
1611            VolumeDeathHandler handler = getDeathHandler(cb, state);
1612            if (handler == null) {
1613                Log.e(TAG, "Could not get client death handler for stream: "+mStreamType);
1614                return;
1615            }
1616            handler.mute(state);
1617        }
1618
1619        private int getValidIndex(int index) {
1620            if (index < 0) {
1621                return 0;
1622            } else if (index > mIndexMax) {
1623                return mIndexMax;
1624            }
1625
1626            return index;
1627        }
1628
1629        private class VolumeDeathHandler implements IBinder.DeathRecipient {
1630            private IBinder mICallback; // To be notified of client's death
1631            private int mMuteCount; // Number of active mutes for this client
1632
1633            VolumeDeathHandler(IBinder cb) {
1634                mICallback = cb;
1635            }
1636
1637            public void mute(boolean state) {
1638                synchronized(mDeathHandlers) {
1639                    if (state) {
1640                        if (mMuteCount == 0) {
1641                            // Register for client death notification
1642                            try {
1643                                // mICallback can be 0 if muted by AudioService
1644                                if (mICallback != null) {
1645                                    mICallback.linkToDeath(this, 0);
1646                                }
1647                                mDeathHandlers.add(this);
1648                                // If the stream is not yet muted by any client, set lvel to 0
1649                                if (muteCount() == 0) {
1650                                    setIndex(0, false);
1651                                    sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, mStreamType, SENDMSG_NOOP, 0, 0,
1652                                            VolumeStreamState.this, 0);
1653                                }
1654                            } catch (RemoteException e) {
1655                                // Client has died!
1656                                binderDied();
1657                                mDeathHandlers.notify();
1658                                return;
1659                            }
1660                        } else {
1661                            Log.w(TAG, "stream: "+mStreamType+" was already muted by this client");
1662                        }
1663                        mMuteCount++;
1664                    } else {
1665                        if (mMuteCount == 0) {
1666                            Log.e(TAG, "unexpected unmute for stream: "+mStreamType);
1667                        } else {
1668                            mMuteCount--;
1669                            if (mMuteCount == 0) {
1670                                // Unregistr from client death notification
1671                                mDeathHandlers.remove(this);
1672                                // mICallback can be 0 if muted by AudioService
1673                                if (mICallback != null) {
1674                                    mICallback.unlinkToDeath(this, 0);
1675                                }
1676                                if (muteCount() == 0) {
1677                                    // If the stream is not muted any more, restore it's volume if
1678                                    // ringer mode allows it
1679                                    if (!isStreamAffectedByRingerMode(mStreamType) || mRingerMode == AudioManager.RINGER_MODE_NORMAL) {
1680                                        setIndex(mLastAudibleIndex, false);
1681                                        sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, mStreamType, SENDMSG_NOOP, 0, 0,
1682                                                VolumeStreamState.this, 0);
1683                                    }
1684                                }
1685                            }
1686                        }
1687                    }
1688                    mDeathHandlers.notify();
1689                }
1690            }
1691
1692            public void binderDied() {
1693                Log.w(TAG, "Volume service client died for stream: "+mStreamType);
1694                if (mMuteCount != 0) {
1695                    // Reset all active mute requests from this client.
1696                    mMuteCount = 1;
1697                    mute(false);
1698                }
1699            }
1700        }
1701
1702        private int muteCount() {
1703            int count = 0;
1704            int size = mDeathHandlers.size();
1705            for (int i = 0; i < size; i++) {
1706                count += mDeathHandlers.get(i).mMuteCount;
1707            }
1708            return count;
1709        }
1710
1711        private VolumeDeathHandler getDeathHandler(IBinder cb, boolean state) {
1712            synchronized(mDeathHandlers) {
1713                VolumeDeathHandler handler;
1714                int size = mDeathHandlers.size();
1715                for (int i = 0; i < size; i++) {
1716                    handler = mDeathHandlers.get(i);
1717                    if (cb == handler.mICallback) {
1718                        return handler;
1719                    }
1720                }
1721                // If this is the first mute request for this client, create a new
1722                // client death handler. Otherwise, it is an out of sequence unmute request.
1723                if (state) {
1724                    handler = new VolumeDeathHandler(cb);
1725                } else {
1726                    Log.w(TAG, "stream was not muted by this client");
1727                    handler = null;
1728                }
1729                return handler;
1730            }
1731        }
1732    }
1733
1734    /** Thread that handles native AudioSystem control. */
1735    private class AudioSystemThread extends Thread {
1736        AudioSystemThread() {
1737            super("AudioService");
1738        }
1739
1740        @Override
1741        public void run() {
1742            // Set this thread up so the handler will work on it
1743            Looper.prepare();
1744
1745            synchronized(AudioService.this) {
1746                mAudioHandler = new AudioHandler();
1747
1748                // Notify that the handler has been created
1749                AudioService.this.notify();
1750            }
1751
1752            // Listen for volume change requests that are set by VolumePanel
1753            Looper.loop();
1754        }
1755    }
1756
1757    /** Handles internal volume messages in separate volume thread. */
1758    private class AudioHandler extends Handler {
1759
1760        private void setSystemVolume(VolumeStreamState streamState) {
1761
1762            // Adjust volume
1763            setStreamVolumeIndex(streamState.mStreamType, streamState.mIndex);
1764
1765            // Apply change to all streams using this one as alias
1766            int numStreamTypes = AudioSystem.getNumStreamTypes();
1767            for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
1768                if (streamType != streamState.mStreamType &&
1769                    STREAM_VOLUME_ALIAS[streamType] == streamState.mStreamType) {
1770                    setStreamVolumeIndex(streamType, mStreamStates[streamType].mIndex);
1771                }
1772            }
1773
1774            // Post a persist volume msg
1775            sendMsg(mAudioHandler, MSG_PERSIST_VOLUME, streamState.mStreamType,
1776                    SENDMSG_REPLACE, 1, 1, streamState, PERSIST_DELAY);
1777        }
1778
1779        private void persistVolume(VolumeStreamState streamState, boolean current, boolean lastAudible) {
1780            if (current) {
1781                System.putInt(mContentResolver, streamState.mVolumeIndexSettingName,
1782                              (streamState.mIndex + 5)/ 10);
1783            }
1784            if (lastAudible) {
1785                System.putInt(mContentResolver, streamState.mLastAudibleVolumeIndexSettingName,
1786                    (streamState.mLastAudibleIndex + 5) / 10);
1787            }
1788        }
1789
1790        private void persistRingerMode() {
1791            System.putInt(mContentResolver, System.MODE_RINGER, mRingerMode);
1792        }
1793
1794        private void persistVibrateSetting() {
1795            System.putInt(mContentResolver, System.VIBRATE_ON, mVibrateSetting);
1796        }
1797
1798        private void playSoundEffect(int effectType, int volume) {
1799            synchronized (mSoundEffectsLock) {
1800                if (mSoundPool == null) {
1801                    return;
1802                }
1803                float volFloat;
1804                // use STREAM_MUSIC volume attenuated by 3 dB if volume is not specified by caller
1805                if (volume < 0) {
1806                    // Same linear to log conversion as in native AudioSystem::linearToLog() (AudioSystem.cpp)
1807                    float dBPerStep = (float)((0.5 * 100) / MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC]);
1808                    int musicVolIndex = (mStreamStates[AudioSystem.STREAM_MUSIC].mIndex + 5) / 10;
1809                    float musicVoldB = dBPerStep * (musicVolIndex - MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC]);
1810                    volFloat = (float)Math.pow(10, (musicVoldB - 3)/20);
1811                } else {
1812                    volFloat = (float) volume / 1000.0f;
1813                }
1814
1815                if (SOUND_EFFECT_FILES_MAP[effectType][1] > 0) {
1816                    mSoundPool.play(SOUND_EFFECT_FILES_MAP[effectType][1], volFloat, volFloat, 0, 0, 1.0f);
1817                } else {
1818                    MediaPlayer mediaPlayer = new MediaPlayer();
1819                    if (mediaPlayer != null) {
1820                        try {
1821                            String filePath = Environment.getRootDirectory() + SOUND_EFFECTS_PATH + SOUND_EFFECT_FILES[SOUND_EFFECT_FILES_MAP[effectType][0]];
1822                            mediaPlayer.setDataSource(filePath);
1823                            mediaPlayer.setAudioStreamType(AudioSystem.STREAM_SYSTEM);
1824                            mediaPlayer.prepare();
1825                            mediaPlayer.setVolume(volFloat, volFloat);
1826                            mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
1827                                public void onCompletion(MediaPlayer mp) {
1828                                    cleanupPlayer(mp);
1829                                }
1830                            });
1831                            mediaPlayer.setOnErrorListener(new OnErrorListener() {
1832                                public boolean onError(MediaPlayer mp, int what, int extra) {
1833                                    cleanupPlayer(mp);
1834                                    return true;
1835                                }
1836                            });
1837                            mediaPlayer.start();
1838                        } catch (IOException ex) {
1839                            Log.w(TAG, "MediaPlayer IOException: "+ex);
1840                        } catch (IllegalArgumentException ex) {
1841                            Log.w(TAG, "MediaPlayer IllegalArgumentException: "+ex);
1842                        } catch (IllegalStateException ex) {
1843                            Log.w(TAG, "MediaPlayer IllegalStateException: "+ex);
1844                        }
1845                    }
1846                }
1847            }
1848        }
1849
1850        private void cleanupPlayer(MediaPlayer mp) {
1851            if (mp != null) {
1852                try {
1853                    mp.stop();
1854                    mp.release();
1855                } catch (IllegalStateException ex) {
1856                    Log.w(TAG, "MediaPlayer IllegalStateException: "+ex);
1857                }
1858            }
1859        }
1860
1861        @Override
1862        public void handleMessage(Message msg) {
1863            int baseMsgWhat = getMsgBase(msg.what);
1864
1865            switch (baseMsgWhat) {
1866
1867                case MSG_SET_SYSTEM_VOLUME:
1868                    setSystemVolume((VolumeStreamState) msg.obj);
1869                    break;
1870
1871                case MSG_PERSIST_VOLUME:
1872                    persistVolume((VolumeStreamState) msg.obj, (msg.arg1 != 0), (msg.arg2 != 0));
1873                    break;
1874
1875                case MSG_PERSIST_RINGER_MODE:
1876                    persistRingerMode();
1877                    break;
1878
1879                case MSG_PERSIST_VIBRATE_SETTING:
1880                    persistVibrateSetting();
1881                    break;
1882
1883                case MSG_MEDIA_SERVER_DIED:
1884                    // Force creation of new IAudioflinger interface
1885                    if (!mMediaServerOk) {
1886                        Log.e(TAG, "Media server died.");
1887                        AudioSystem.isStreamActive(AudioSystem.STREAM_MUSIC);
1888                        sendMsg(mAudioHandler, MSG_MEDIA_SERVER_DIED, SHARED_MSG, SENDMSG_NOOP, 0, 0,
1889                                null, 500);
1890                    }
1891                    break;
1892
1893                case MSG_MEDIA_SERVER_STARTED:
1894                    Log.e(TAG, "Media server started.");
1895                    // indicate to audio HAL that we start the reconfiguration phase after a media
1896                    // server crash
1897                    // Note that MSG_MEDIA_SERVER_STARTED message is only received when the media server
1898                    // process restarts after a crash, not the first time it is started.
1899                    AudioSystem.setParameters("restarting=true");
1900
1901                    // Restore device connection states
1902                    Set set = mConnectedDevices.entrySet();
1903                    Iterator i = set.iterator();
1904                    while(i.hasNext()){
1905                        Map.Entry device = (Map.Entry)i.next();
1906                        AudioSystem.setDeviceConnectionState(((Integer)device.getKey()).intValue(),
1907                                                             AudioSystem.DEVICE_STATE_AVAILABLE,
1908                                                             (String)device.getValue());
1909                    }
1910
1911                    // Restore call state
1912                    AudioSystem.setPhoneState(mMode);
1913
1914                    // Restore forced usage for communcations and record
1915                    AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, mForcedUseForComm);
1916                    AudioSystem.setForceUse(AudioSystem.FOR_RECORD, mForcedUseForComm);
1917
1918                    // Restore stream volumes
1919                    int numStreamTypes = AudioSystem.getNumStreamTypes();
1920                    for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
1921                        int index;
1922                        VolumeStreamState streamState = mStreamStates[streamType];
1923                        AudioSystem.initStreamVolume(streamType, 0, (streamState.mIndexMax + 5) / 10);
1924                        if (streamState.muteCount() == 0) {
1925                            index = streamState.mIndex;
1926                        } else {
1927                            index = 0;
1928                        }
1929                        setStreamVolumeIndex(streamType, index);
1930                    }
1931
1932                    // Restore ringer mode
1933                    setRingerModeInt(getRingerMode(), false);
1934
1935                    // indicate the end of reconfiguration phase to audio HAL
1936                    AudioSystem.setParameters("restarting=false");
1937                    break;
1938
1939                case MSG_LOAD_SOUND_EFFECTS:
1940                    loadSoundEffects();
1941                    break;
1942
1943                case MSG_PLAY_SOUND_EFFECT:
1944                    playSoundEffect(msg.arg1, msg.arg2);
1945                    break;
1946
1947                case MSG_BTA2DP_DOCK_TIMEOUT:
1948                    // msg.obj  == address of BTA2DP device
1949                    makeA2dpDeviceUnavailableNow( (String) msg.obj );
1950                    break;
1951            }
1952        }
1953    }
1954
1955    private class SettingsObserver extends ContentObserver {
1956
1957        SettingsObserver() {
1958            super(new Handler());
1959            mContentResolver.registerContentObserver(Settings.System.getUriFor(
1960                Settings.System.MODE_RINGER_STREAMS_AFFECTED), false, this);
1961            mContentResolver.registerContentObserver(Settings.System.getUriFor(
1962                    Settings.System.NOTIFICATIONS_USE_RING_VOLUME), false, this);
1963        }
1964
1965        @Override
1966        public void onChange(boolean selfChange) {
1967            super.onChange(selfChange);
1968            synchronized (mSettingsLock) {
1969                int ringerModeAffectedStreams = Settings.System.getInt(mContentResolver,
1970                        Settings.System.MODE_RINGER_STREAMS_AFFECTED,
1971                        0);
1972                if (ringerModeAffectedStreams != mRingerModeAffectedStreams) {
1973                    /*
1974                     * Ensure all stream types that should be affected by ringer mode
1975                     * are in the proper state.
1976                     */
1977                    mRingerModeAffectedStreams = ringerModeAffectedStreams;
1978                    setRingerModeInt(getRingerMode(), false);
1979                }
1980
1981                int notificationsUseRingVolume = Settings.System.getInt(mContentResolver,
1982                        Settings.System.NOTIFICATIONS_USE_RING_VOLUME,
1983                        1);
1984                if (notificationsUseRingVolume != mNotificationsUseRingVolume) {
1985                    mNotificationsUseRingVolume = notificationsUseRingVolume;
1986                    if (mNotificationsUseRingVolume == 1) {
1987                        STREAM_VOLUME_ALIAS[AudioSystem.STREAM_NOTIFICATION] = AudioSystem.STREAM_RING;
1988                        mStreamStates[AudioSystem.STREAM_NOTIFICATION].setVolumeIndexSettingName(
1989                                System.VOLUME_SETTINGS[AudioSystem.STREAM_RING]);
1990                    } else {
1991                        STREAM_VOLUME_ALIAS[AudioSystem.STREAM_NOTIFICATION] = AudioSystem.STREAM_NOTIFICATION;
1992                        mStreamStates[AudioSystem.STREAM_NOTIFICATION].setVolumeIndexSettingName(
1993                                System.VOLUME_SETTINGS[AudioSystem.STREAM_NOTIFICATION]);
1994                        // Persist notification volume volume as it was not persisted while aliased to ring volume
1995                        //  and persist with no delay as there might be registered observers of the persisted
1996                        //  notification volume.
1997                        sendMsg(mAudioHandler, MSG_PERSIST_VOLUME, AudioSystem.STREAM_NOTIFICATION,
1998                                SENDMSG_REPLACE, 1, 1, mStreamStates[AudioSystem.STREAM_NOTIFICATION], 0);
1999                    }
2000                }
2001            }
2002        }
2003    }
2004
2005    private void makeA2dpDeviceAvailable(String address) {
2006        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP,
2007                AudioSystem.DEVICE_STATE_AVAILABLE,
2008                address);
2009        // Reset A2DP suspend state each time a new sink is connected
2010        AudioSystem.setParameters("A2dpSuspended=false");
2011        mConnectedDevices.put( new Integer(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP),
2012                address);
2013    }
2014
2015    private void makeA2dpDeviceUnavailableNow(String address) {
2016        Intent noisyIntent = new Intent(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
2017        mContext.sendBroadcast(noisyIntent);
2018        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP,
2019                AudioSystem.DEVICE_STATE_UNAVAILABLE,
2020                address);
2021        mConnectedDevices.remove(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP);
2022    }
2023
2024    private void makeA2dpDeviceUnavailableLater(String address) {
2025        // prevent any activity on the A2DP audio output to avoid unwanted
2026        // reconnection of the sink.
2027        AudioSystem.setParameters("A2dpSuspended=true");
2028        // the device will be made unavailable later, so consider it disconnected right away
2029        mConnectedDevices.remove(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP);
2030        // send the delayed message to make the device unavailable later
2031        Message msg = mAudioHandler.obtainMessage(MSG_BTA2DP_DOCK_TIMEOUT, address);
2032        mAudioHandler.sendMessageDelayed(msg, BTA2DP_DOCK_TIMEOUT_MILLIS);
2033
2034    }
2035
2036    private void cancelA2dpDeviceTimeout() {
2037        mAudioHandler.removeMessages(MSG_BTA2DP_DOCK_TIMEOUT);
2038    }
2039
2040    private boolean hasScheduledA2dpDockTimeout() {
2041        return mAudioHandler.hasMessages(MSG_BTA2DP_DOCK_TIMEOUT);
2042    }
2043
2044    /* cache of the address of the last dock the device was connected to */
2045    private String mDockAddress;
2046
2047    /**
2048     * Receiver for misc intent broadcasts the Phone app cares about.
2049     */
2050    private class AudioServiceBroadcastReceiver extends BroadcastReceiver {
2051        @Override
2052        public void onReceive(Context context, Intent intent) {
2053            String action = intent.getAction();
2054
2055            if (action.equals(Intent.ACTION_DOCK_EVENT)) {
2056                int dockState = intent.getIntExtra(Intent.EXTRA_DOCK_STATE,
2057                        Intent.EXTRA_DOCK_STATE_UNDOCKED);
2058                int config;
2059                switch (dockState) {
2060                    case Intent.EXTRA_DOCK_STATE_DESK:
2061                        config = AudioSystem.FORCE_BT_DESK_DOCK;
2062                        break;
2063                    case Intent.EXTRA_DOCK_STATE_CAR:
2064                        config = AudioSystem.FORCE_BT_CAR_DOCK;
2065                        break;
2066                    case Intent.EXTRA_DOCK_STATE_LE_DESK:
2067                        config = AudioSystem.FORCE_ANALOG_DOCK;
2068                        break;
2069                    case Intent.EXTRA_DOCK_STATE_HE_DESK:
2070                        config = AudioSystem.FORCE_DIGITAL_DOCK;
2071                        break;
2072                    case Intent.EXTRA_DOCK_STATE_UNDOCKED:
2073                    default:
2074                        config = AudioSystem.FORCE_NONE;
2075                }
2076                AudioSystem.setForceUse(AudioSystem.FOR_DOCK, config);
2077            } else if (action.equals(BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED)) {
2078                int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE,
2079                                               BluetoothProfile.STATE_DISCONNECTED);
2080                BluetoothDevice btDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
2081                String address = btDevice.getAddress();
2082                boolean isConnected =
2083                    (mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP) &&
2084                     mConnectedDevices.get(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP).equals(address));
2085
2086                if (isConnected && state != BluetoothProfile.STATE_CONNECTED) {
2087                    if (btDevice.isBluetoothDock()) {
2088                        if (state == BluetoothProfile.STATE_DISCONNECTED) {
2089                            // introduction of a delay for transient disconnections of docks when
2090                            // power is rapidly turned off/on, this message will be canceled if
2091                            // we reconnect the dock under a preset delay
2092                            makeA2dpDeviceUnavailableLater(address);
2093                            // the next time isConnected is evaluated, it will be false for the dock
2094                        }
2095                    } else {
2096                        makeA2dpDeviceUnavailableNow(address);
2097                    }
2098                } else if (!isConnected && state == BluetoothProfile.STATE_CONNECTED) {
2099                    if (btDevice.isBluetoothDock()) {
2100                        // this could be a reconnection after a transient disconnection
2101                        cancelA2dpDeviceTimeout();
2102                        mDockAddress = address;
2103                    } else {
2104                        // this could be a connection of another A2DP device before the timeout of
2105                        // a dock: cancel the dock timeout, and make the dock unavailable now
2106                        if(hasScheduledA2dpDockTimeout()) {
2107                            cancelA2dpDeviceTimeout();
2108                            makeA2dpDeviceUnavailableNow(mDockAddress);
2109                        }
2110                    }
2111                    makeA2dpDeviceAvailable(address);
2112                }
2113            } else if (action.equals(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED)) {
2114                int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE,
2115                                               BluetoothProfile.STATE_DISCONNECTED);
2116                int device = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO;
2117                BluetoothDevice btDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
2118                String address = null;
2119                if (btDevice != null) {
2120                    address = btDevice.getAddress();
2121                    BluetoothClass btClass = btDevice.getBluetoothClass();
2122                    if (btClass != null) {
2123                        switch (btClass.getDeviceClass()) {
2124                        case BluetoothClass.Device.AUDIO_VIDEO_WEARABLE_HEADSET:
2125                        case BluetoothClass.Device.AUDIO_VIDEO_HANDSFREE:
2126                            device = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
2127                            break;
2128                        case BluetoothClass.Device.AUDIO_VIDEO_CAR_AUDIO:
2129                            device = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
2130                            break;
2131                        }
2132                    }
2133                }
2134
2135                boolean isConnected = (mConnectedDevices.containsKey(device) &&
2136                                       mConnectedDevices.get(device).equals(address));
2137
2138                synchronized (mScoClients) {
2139                    if (isConnected && state != BluetoothProfile.STATE_CONNECTED) {
2140                        AudioSystem.setDeviceConnectionState(device,
2141                                                             AudioSystem.DEVICE_STATE_UNAVAILABLE,
2142                                                             address);
2143                        mConnectedDevices.remove(device);
2144                        mBluetoothHeadsetDevice = null;
2145                        clearAllScoClients(null, false);
2146                        mScoAudioState = SCO_STATE_INACTIVE;
2147                    } else if (!isConnected && state == BluetoothProfile.STATE_CONNECTED) {
2148                        AudioSystem.setDeviceConnectionState(device,
2149                                                             AudioSystem.DEVICE_STATE_AVAILABLE,
2150                                                             address);
2151                        mConnectedDevices.put(new Integer(device), address);
2152                        mBluetoothHeadsetDevice = btDevice;
2153                    }
2154                }
2155            } else if (action.equals(Intent.ACTION_HEADSET_PLUG)) {
2156                int state = intent.getIntExtra("state", 0);
2157                int microphone = intent.getIntExtra("microphone", 0);
2158
2159                if (microphone != 0) {
2160                    boolean isConnected =
2161                        mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_WIRED_HEADSET);
2162                    if (state == 0 && isConnected) {
2163                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADSET,
2164                                AudioSystem.DEVICE_STATE_UNAVAILABLE,
2165                                "");
2166                        mConnectedDevices.remove(AudioSystem.DEVICE_OUT_WIRED_HEADSET);
2167                    } else if (state == 1 && !isConnected)  {
2168                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADSET,
2169                                AudioSystem.DEVICE_STATE_AVAILABLE,
2170                                "");
2171                        mConnectedDevices.put(
2172                                new Integer(AudioSystem.DEVICE_OUT_WIRED_HEADSET), "");
2173                    }
2174                } else {
2175                    boolean isConnected =
2176                        mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE);
2177                    if (state == 0 && isConnected) {
2178                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE,
2179                                AudioSystem.DEVICE_STATE_UNAVAILABLE,
2180                                "");
2181                        mConnectedDevices.remove(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE);
2182                    } else if (state == 1 && !isConnected)  {
2183                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE,
2184                                AudioSystem.DEVICE_STATE_AVAILABLE,
2185                                "");
2186                        mConnectedDevices.put(
2187                                new Integer(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE), "");
2188                    }
2189                }
2190            } else if (action.equals(Intent.ACTION_USB_ANLG_HEADSET_PLUG)) {
2191                int state = intent.getIntExtra("state", 0);
2192                Log.v(TAG, "Broadcast Receiver: Got ACTION_USB_ANLG_HEADSET_PLUG, state = "+state);
2193                boolean isConnected =
2194                    mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_ANLG_DOCK_HEADSET);
2195                if (state == 0 && isConnected) {
2196                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_ANLG_DOCK_HEADSET,
2197                                                         AudioSystem.DEVICE_STATE_UNAVAILABLE, "");
2198                    mConnectedDevices.remove(AudioSystem.DEVICE_OUT_ANLG_DOCK_HEADSET);
2199                } else if (state == 1 && !isConnected)  {
2200                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_ANLG_DOCK_HEADSET,
2201                                                         AudioSystem.DEVICE_STATE_AVAILABLE, "");
2202                    mConnectedDevices.put(
2203                            new Integer(AudioSystem.DEVICE_OUT_ANLG_DOCK_HEADSET), "");
2204                }
2205            } else if (action.equals(Intent.ACTION_HDMI_AUDIO_PLUG)) {
2206                int state = intent.getIntExtra("state", 0);
2207                Log.v(TAG, "Broadcast Receiver: Got ACTION_HDMI_AUDIO_PLUG, state = "+state);
2208                boolean isConnected =
2209                    mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_AUX_DIGITAL);
2210                if (state == 0 && isConnected) {
2211                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_AUX_DIGITAL,
2212                                                         AudioSystem.DEVICE_STATE_UNAVAILABLE, "");
2213                    mConnectedDevices.remove(AudioSystem.DEVICE_OUT_AUX_DIGITAL);
2214                } else if (state == 1 && !isConnected)  {
2215                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_AUX_DIGITAL,
2216                                                         AudioSystem.DEVICE_STATE_AVAILABLE, "");
2217                    mConnectedDevices.put( new Integer(AudioSystem.DEVICE_OUT_AUX_DIGITAL), "");
2218                }
2219            } else if (action.equals(Intent.ACTION_USB_DGTL_HEADSET_PLUG)) {
2220                int state = intent.getIntExtra("state", 0);
2221                Log.v(TAG, "Broadcast Receiver: Got ACTION_USB_DGTL_HEADSET_PLUG, state = "+state);
2222                boolean isConnected =
2223                    mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_DGTL_DOCK_HEADSET);
2224                if (state == 0 && isConnected) {
2225                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_DGTL_DOCK_HEADSET,
2226                                                         AudioSystem.DEVICE_STATE_UNAVAILABLE, "");
2227                    mConnectedDevices.remove(AudioSystem.DEVICE_OUT_DGTL_DOCK_HEADSET);
2228                } else if (state == 1 && !isConnected)  {
2229                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_DGTL_DOCK_HEADSET,
2230                                                         AudioSystem.DEVICE_STATE_AVAILABLE, "");
2231                    mConnectedDevices.put(
2232                            new Integer(AudioSystem.DEVICE_OUT_DGTL_DOCK_HEADSET), "");
2233                }
2234            } else if (action.equals(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED)) {
2235                boolean broadcast = false;
2236                int audioState = AudioManager.SCO_AUDIO_STATE_ERROR;
2237                synchronized (mScoClients) {
2238                    int btState = intent.getIntExtra(BluetoothProfile.EXTRA_STATE, -1);
2239                    if (!mScoClients.isEmpty() && mScoAudioState == SCO_STATE_ACTIVE_INTERNAL) {
2240                        broadcast = true;
2241                    }
2242                    switch (btState) {
2243                    case BluetoothHeadset.STATE_AUDIO_CONNECTED:
2244                        audioState = AudioManager.SCO_AUDIO_STATE_CONNECTED;
2245                        if (mScoAudioState != SCO_STATE_ACTIVE_INTERNAL) {
2246                            mScoAudioState = SCO_STATE_ACTIVE_EXTERNAL;
2247                        }
2248                        break;
2249                    case BluetoothHeadset.STATE_AUDIO_DISCONNECTED:
2250                        audioState = AudioManager.SCO_AUDIO_STATE_DISCONNECTED;
2251                        mScoAudioState = SCO_STATE_INACTIVE;
2252                        break;
2253                    case BluetoothHeadset.STATE_AUDIO_CONNECTING:
2254                        if (mScoAudioState != SCO_STATE_ACTIVE_INTERNAL) {
2255                            mScoAudioState = SCO_STATE_ACTIVE_EXTERNAL;
2256                        }
2257                    default:
2258                        // do not broadcast CONNECTING or invalid state
2259                        broadcast = false;
2260                        break;
2261                    }
2262                }
2263                if (broadcast) {
2264                    Intent newIntent = new Intent(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED);
2265                    newIntent.putExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, audioState);
2266                    mContext.sendStickyBroadcast(newIntent);
2267                }
2268            } else if (action.equals(Intent.ACTION_BOOT_COMPLETED)) {
2269                mBootCompleted = true;
2270                sendMsg(mAudioHandler, MSG_LOAD_SOUND_EFFECTS, SHARED_MSG, SENDMSG_NOOP,
2271                        0, 0, null, 0);
2272                Intent newIntent = new Intent(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED);
2273                newIntent.putExtra(AudioManager.EXTRA_SCO_AUDIO_STATE,
2274                        AudioManager.SCO_AUDIO_STATE_DISCONNECTED);
2275                mContext.sendStickyBroadcast(newIntent);
2276            }
2277        }
2278    }
2279
2280    //==========================================================================================
2281    // AudioFocus
2282    //==========================================================================================
2283
2284    /* constant to identify focus stack entry that is used to hold the focus while the phone
2285     * is ringing or during a call
2286     */
2287    private final static String IN_VOICE_COMM_FOCUS_ID = "AudioFocus_For_Phone_Ring_And_Calls";
2288
2289    private final static Object mAudioFocusLock = new Object();
2290
2291    private final static Object mRingingLock = new Object();
2292
2293    private PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
2294        @Override
2295        public void onCallStateChanged(int state, String incomingNumber) {
2296            if (state == TelephonyManager.CALL_STATE_RINGING) {
2297                //Log.v(TAG, " CALL_STATE_RINGING");
2298                synchronized(mRingingLock) {
2299                    mIsRinging = true;
2300                }
2301            } else if ((state == TelephonyManager.CALL_STATE_OFFHOOK)
2302                    || (state == TelephonyManager.CALL_STATE_IDLE)) {
2303                synchronized(mRingingLock) {
2304                    mIsRinging = false;
2305                }
2306            }
2307        }
2308    };
2309
2310    private void notifyTopOfAudioFocusStack() {
2311        // notify the top of the stack it gained focus
2312        if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
2313            if (canReassignAudioFocus()) {
2314                try {
2315                    mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(
2316                            AudioManager.AUDIOFOCUS_GAIN, mFocusStack.peek().mClientId);
2317                } catch (RemoteException e) {
2318                    Log.e(TAG, "Failure to signal gain of audio control focus due to "+ e);
2319                    e.printStackTrace();
2320                }
2321            }
2322        }
2323    }
2324
2325    private static class FocusStackEntry {
2326        public int mStreamType = -1;// no stream type
2327        public boolean mIsTransportControlReceiver = false;
2328        public IAudioFocusDispatcher mFocusDispatcher = null;
2329        public IBinder mSourceRef = null;
2330        public String mClientId;
2331        public int mFocusChangeType;
2332
2333        public FocusStackEntry() {
2334        }
2335
2336        public FocusStackEntry(int streamType, int duration, boolean isTransportControlReceiver,
2337                IAudioFocusDispatcher afl, IBinder source, String id) {
2338            mStreamType = streamType;
2339            mIsTransportControlReceiver = isTransportControlReceiver;
2340            mFocusDispatcher = afl;
2341            mSourceRef = source;
2342            mClientId = id;
2343            mFocusChangeType = duration;
2344        }
2345    }
2346
2347    private Stack<FocusStackEntry> mFocusStack = new Stack<FocusStackEntry>();
2348
2349    /**
2350     * Helper function:
2351     * Display in the log the current entries in the audio focus stack
2352     */
2353    private void dumpFocusStack(PrintWriter pw) {
2354        pw.println("\nAudio Focus stack entries:");
2355        synchronized(mAudioFocusLock) {
2356            Iterator<FocusStackEntry> stackIterator = mFocusStack.iterator();
2357            while(stackIterator.hasNext()) {
2358                FocusStackEntry fse = stackIterator.next();
2359                pw.println("     source:" + fse.mSourceRef + " -- client: " + fse.mClientId
2360                        + " -- duration: " +fse.mFocusChangeType);
2361            }
2362        }
2363    }
2364
2365    /**
2366     * Helper function:
2367     * Remove a focus listener from the focus stack.
2368     * @param focusListenerToRemove the focus listener
2369     * @param signal if true and the listener was at the top of the focus stack, i.e. it was holding
2370     *   focus, notify the next item in the stack it gained focus.
2371     */
2372    private void removeFocusStackEntry(String clientToRemove, boolean signal) {
2373        // is the current top of the focus stack abandoning focus? (because of death or request)
2374        if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientToRemove))
2375        {
2376            //Log.i(TAG, "   removeFocusStackEntry() removing top of stack");
2377            mFocusStack.pop();
2378            if (signal) {
2379                // notify the new top of the stack it gained focus
2380                notifyTopOfAudioFocusStack();
2381            }
2382        } else {
2383            // focus is abandoned by a client that's not at the top of the stack,
2384            // no need to update focus.
2385            Iterator<FocusStackEntry> stackIterator = mFocusStack.iterator();
2386            while(stackIterator.hasNext()) {
2387                FocusStackEntry fse = (FocusStackEntry)stackIterator.next();
2388                if(fse.mClientId.equals(clientToRemove)) {
2389                    Log.i(TAG, " AudioFocus  abandonAudioFocus(): removing entry for "
2390                            + fse.mClientId);
2391                    mFocusStack.remove(fse);
2392                }
2393            }
2394        }
2395    }
2396
2397    /**
2398     * Helper function:
2399     * Remove focus listeners from the focus stack for a particular client.
2400     */
2401    private void removeFocusStackEntryForClient(IBinder cb) {
2402        // is the owner of the audio focus part of the client to remove?
2403        boolean isTopOfStackForClientToRemove = !mFocusStack.isEmpty() &&
2404                mFocusStack.peek().mSourceRef.equals(cb);
2405        Iterator<FocusStackEntry> stackIterator = mFocusStack.iterator();
2406        while(stackIterator.hasNext()) {
2407            FocusStackEntry fse = (FocusStackEntry)stackIterator.next();
2408            if(fse.mSourceRef.equals(cb)) {
2409                Log.i(TAG, " AudioFocus  abandonAudioFocus(): removing entry for "
2410                        + fse.mClientId);
2411                mFocusStack.remove(fse);
2412            }
2413        }
2414        if (isTopOfStackForClientToRemove) {
2415            // we removed an entry at the top of the stack:
2416            //  notify the new top of the stack it gained focus.
2417            notifyTopOfAudioFocusStack();
2418        }
2419    }
2420
2421    /**
2422     * Helper function:
2423     * Returns true if the system is in a state where the focus can be reevaluated, false otherwise.
2424     */
2425    private boolean canReassignAudioFocus() {
2426        // focus requests are rejected during a phone call or when the phone is ringing
2427        // this is equivalent to IN_VOICE_COMM_FOCUS_ID having the focus
2428        if (!mFocusStack.isEmpty() && IN_VOICE_COMM_FOCUS_ID.equals(mFocusStack.peek().mClientId)) {
2429            return false;
2430        }
2431        return true;
2432    }
2433
2434    /**
2435     * Inner class to monitor audio focus client deaths, and remove them from the audio focus
2436     * stack if necessary.
2437     */
2438    private class AudioFocusDeathHandler implements IBinder.DeathRecipient {
2439        private IBinder mCb; // To be notified of client's death
2440
2441        AudioFocusDeathHandler(IBinder cb) {
2442            mCb = cb;
2443        }
2444
2445        public void binderDied() {
2446            synchronized(mAudioFocusLock) {
2447                Log.w(TAG, "  AudioFocus   audio focus client died");
2448                removeFocusStackEntryForClient(mCb);
2449            }
2450        }
2451
2452        public IBinder getBinder() {
2453            return mCb;
2454        }
2455    }
2456
2457
2458    /** @see AudioManager#requestAudioFocus(IAudioFocusDispatcher, int, int) */
2459    public int requestAudioFocus(int mainStreamType, int focusChangeHint, IBinder cb,
2460            IAudioFocusDispatcher fd, String clientId) {
2461        Log.i(TAG, " AudioFocus  requestAudioFocus() from " + clientId);
2462        // the main stream type for the audio focus request is currently not used. It may
2463        // potentially be used to handle multiple stream type-dependent audio focuses.
2464
2465        // we need a valid binder callback for clients other than the AudioService's phone
2466        // state listener
2467        if (!IN_VOICE_COMM_FOCUS_ID.equals(clientId) && ((cb == null) || !cb.pingBinder())) {
2468            Log.i(TAG, " AudioFocus  DOA client for requestAudioFocus(), exiting");
2469            return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
2470        }
2471
2472        synchronized(mAudioFocusLock) {
2473            if (!canReassignAudioFocus()) {
2474                return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
2475            }
2476
2477            if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientId)) {
2478                // if focus is already owned by this client and the reason for acquiring the focus
2479                // hasn't changed, don't do anything
2480                if (mFocusStack.peek().mFocusChangeType == focusChangeHint) {
2481                    return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
2482                }
2483                // the reason for the audio focus request has changed: remove the current top of
2484                // stack and respond as if we had a new focus owner
2485                mFocusStack.pop();
2486            }
2487
2488            // notify current top of stack it is losing focus
2489            if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
2490                try {
2491                    mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(
2492                            -1 * focusChangeHint, // loss and gain codes are inverse of each other
2493                            mFocusStack.peek().mClientId);
2494                } catch (RemoteException e) {
2495                    Log.e(TAG, " Failure to signal loss of focus due to "+ e);
2496                    e.printStackTrace();
2497                }
2498            }
2499
2500            // focus requester might already be somewhere below in the stack, remove it
2501            removeFocusStackEntry(clientId, false);
2502
2503            // push focus requester at the top of the audio focus stack
2504            mFocusStack.push(new FocusStackEntry(mainStreamType, focusChangeHint, false, fd, cb,
2505                    clientId));
2506        }//synchronized(mAudioFocusLock)
2507
2508        // handle the potential premature death of the new holder of the focus
2509        // (premature death == death before abandoning focus) for a client which is not the
2510        // AudioService's phone state listener
2511        if (!IN_VOICE_COMM_FOCUS_ID.equals(clientId)) {
2512            // Register for client death notification
2513            AudioFocusDeathHandler afdh = new AudioFocusDeathHandler(cb);
2514            try {
2515                cb.linkToDeath(afdh, 0);
2516            } catch (RemoteException e) {
2517                // client has already died!
2518                Log.w(TAG, "AudioFocus  requestAudioFocus() could not link to "+cb+" binder death");
2519            }
2520        }
2521
2522        return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
2523    }
2524
2525    /** @see AudioManager#abandonAudioFocus(IAudioFocusDispatcher) */
2526    public int abandonAudioFocus(IAudioFocusDispatcher fl, String clientId) {
2527        Log.i(TAG, " AudioFocus  abandonAudioFocus() from " + clientId);
2528        try {
2529            // this will take care of notifying the new focus owner if needed
2530            synchronized(mAudioFocusLock) {
2531                removeFocusStackEntry(clientId, true);
2532            }
2533        } catch (java.util.ConcurrentModificationException cme) {
2534            // Catching this exception here is temporary. It is here just to prevent
2535            // a crash seen when the "Silent" notification is played. This is believed to be fixed
2536            // but this try catch block is left just to be safe.
2537            Log.e(TAG, "FATAL EXCEPTION AudioFocus  abandonAudioFocus() caused " + cme);
2538            cme.printStackTrace();
2539        }
2540
2541        return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
2542    }
2543
2544
2545    public void unregisterAudioFocusClient(String clientId) {
2546        synchronized(mAudioFocusLock) {
2547            removeFocusStackEntry(clientId, false);
2548        }
2549    }
2550
2551
2552    //==========================================================================================
2553    // RemoteControl
2554    //==========================================================================================
2555    /**
2556     * Receiver for media button intents. Handles the dispatching of the media button event
2557     * to one of the registered listeners, or if there was none, resumes the intent broadcast
2558     * to the rest of the system.
2559     */
2560    private class MediaButtonBroadcastReceiver extends BroadcastReceiver {
2561        @Override
2562        public void onReceive(Context context, Intent intent) {
2563            String action = intent.getAction();
2564            if (!Intent.ACTION_MEDIA_BUTTON.equals(action)) {
2565                return;
2566            }
2567            KeyEvent event = (KeyEvent) intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
2568            if (event != null) {
2569                // if in a call or ringing, do not break the current phone app behavior
2570                // TODO modify this to let the phone app specifically get the RC focus
2571                //      add modify the phone app to take advantage of the new API
2572                synchronized(mRingingLock) {
2573                    if (mIsRinging || (getMode() == AudioSystem.MODE_IN_CALL) ||
2574                            (getMode() == AudioSystem.MODE_IN_COMMUNICATION) ||
2575                            (getMode() == AudioSystem.MODE_RINGTONE) ) {
2576                        return;
2577                    }
2578                }
2579                synchronized(mRCStack) {
2580                    if (!mRCStack.empty()) {
2581                        // create a new intent specifically aimed at the current registered listener
2582                        Intent targetedIntent = new Intent(Intent.ACTION_MEDIA_BUTTON);
2583                        targetedIntent.putExtras(intent.getExtras());
2584                        targetedIntent.setComponent(mRCStack.peek().mReceiverComponent);
2585                        // trap the current broadcast
2586                        abortBroadcast();
2587                        //Log.v(TAG, " Sending intent" + targetedIntent);
2588                        context.sendBroadcast(targetedIntent, null);
2589                    }
2590                }
2591            }
2592        }
2593    }
2594
2595    private static class RemoteControlStackEntry {
2596        public ComponentName mReceiverComponent;// always non null
2597        // TODO implement registration expiration?
2598        //public int mRegistrationTime;
2599
2600        public RemoteControlStackEntry() {
2601        }
2602
2603        public RemoteControlStackEntry(ComponentName r) {
2604            mReceiverComponent = r;
2605        }
2606    }
2607
2608    private Stack<RemoteControlStackEntry> mRCStack = new Stack<RemoteControlStackEntry>();
2609
2610    /**
2611     * Helper function:
2612     * Display in the log the current entries in the remote control focus stack
2613     */
2614    private void dumpRCStack(PrintWriter pw) {
2615        pw.println("\nRemote Control stack entries:");
2616        synchronized(mRCStack) {
2617            Iterator<RemoteControlStackEntry> stackIterator = mRCStack.iterator();
2618            while(stackIterator.hasNext()) {
2619                RemoteControlStackEntry fse = stackIterator.next();
2620                pw.println("     receiver:" + fse.mReceiverComponent);
2621            }
2622        }
2623    }
2624
2625    /**
2626     * Helper function:
2627     * Set the new remote control receiver at the top of the RC focus stack
2628     */
2629    private void pushMediaButtonReceiver(ComponentName newReceiver) {
2630        // already at top of stack?
2631        if (!mRCStack.empty() && mRCStack.peek().mReceiverComponent.equals(newReceiver)) {
2632            return;
2633        }
2634        Iterator<RemoteControlStackEntry> stackIterator = mRCStack.iterator();
2635        while(stackIterator.hasNext()) {
2636            RemoteControlStackEntry rcse = (RemoteControlStackEntry)stackIterator.next();
2637            if(rcse.mReceiverComponent.equals(newReceiver)) {
2638                mRCStack.remove(rcse);
2639                break;
2640            }
2641        }
2642        mRCStack.push(new RemoteControlStackEntry(newReceiver));
2643    }
2644
2645    /**
2646     * Helper function:
2647     * Remove the remote control receiver from the RC focus stack
2648     */
2649    private void removeMediaButtonReceiver(ComponentName newReceiver) {
2650        Iterator<RemoteControlStackEntry> stackIterator = mRCStack.iterator();
2651        while(stackIterator.hasNext()) {
2652            RemoteControlStackEntry rcse = (RemoteControlStackEntry)stackIterator.next();
2653            if(rcse.mReceiverComponent.equals(newReceiver)) {
2654                mRCStack.remove(rcse);
2655                break;
2656            }
2657        }
2658    }
2659
2660
2661    /** see AudioManager.registerMediaButtonEventReceiver(ComponentName eventReceiver) */
2662    public void registerMediaButtonEventReceiver(ComponentName eventReceiver) {
2663        Log.i(TAG, "  Remote Control   registerMediaButtonEventReceiver() for " + eventReceiver);
2664
2665        synchronized(mRCStack) {
2666            pushMediaButtonReceiver(eventReceiver);
2667        }
2668    }
2669
2670    /** see AudioManager.unregisterMediaButtonEventReceiver(ComponentName eventReceiver) */
2671    public void unregisterMediaButtonEventReceiver(ComponentName eventReceiver) {
2672        Log.i(TAG, "  Remote Control   unregisterMediaButtonEventReceiver() for " + eventReceiver);
2673
2674        synchronized(mRCStack) {
2675            removeMediaButtonReceiver(eventReceiver);
2676        }
2677    }
2678
2679
2680    @Override
2681    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
2682        // TODO probably a lot more to do here than just the audio focus and remote control stacks
2683        dumpFocusStack(pw);
2684        dumpRCStack(pw);
2685    }
2686
2687
2688}
2689