AudioService.java revision 078fd47e91d495175927d1a4a8b9aad039a7ba4e 
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.content.BroadcastReceiver;
21import android.content.ComponentName;
22import android.content.ContentResolver;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentFilter;
26import android.bluetooth.BluetoothA2dp;
27import android.bluetooth.BluetoothClass;
28import android.bluetooth.BluetoothDevice;
29import android.bluetooth.BluetoothHeadset;
30import android.content.pm.PackageManager;
31import android.database.ContentObserver;
32import android.media.MediaPlayer.OnCompletionListener;
33import android.media.MediaPlayer.OnErrorListener;
34import android.os.Binder;
35import android.os.Environment;
36import android.os.Handler;
37import android.os.IBinder;
38import android.os.Looper;
39import android.os.Message;
40import android.os.RemoteException;
41import android.os.ServiceManager;
42import android.provider.Settings;
43import android.provider.Settings.System;
44import android.util.Log;
45import android.view.KeyEvent;
46import android.view.VolumePanel;
47import android.os.SystemProperties;
48
49import com.android.internal.telephony.ITelephony;
50
51import java.io.FileDescriptor;
52import java.io.IOException;
53import java.io.PrintWriter;
54import java.util.ArrayList;
55import java.util.HashMap;
56import java.util.Iterator;
57import java.util.Map;
58import java.util.Set;
59import java.util.Stack;
60
61/**
62 * The implementation of the volume manager service.
63 * <p>
64 * This implementation focuses on delivering a responsive UI. Most methods are
65 * asynchronous to external calls. For example, the task of setting a volume
66 * will update our internal state, but in a separate thread will set the system
67 * volume and later persist to the database. Similarly, setting the ringer mode
68 * will update the state and broadcast a change and in a separate thread later
69 * persist the ringer mode.
70 *
71 * @hide
72 */
73public class AudioService extends IAudioService.Stub {
74
75    private static final String TAG = "AudioService";
76
77    /** How long to delay before persisting a change in volume/ringer mode. */
78    private static final int PERSIST_DELAY = 3000;
79
80    private Context mContext;
81    private ContentResolver mContentResolver;
82
83
84    /** The UI */
85    private VolumePanel mVolumePanel;
86
87    // sendMsg() flags
88    /** Used when a message should be shared across all stream types. */
89    private static final int SHARED_MSG = -1;
90    /** If the msg is already queued, replace it with this one. */
91    private static final int SENDMSG_REPLACE = 0;
92    /** If the msg is already queued, ignore this one and leave the old. */
93    private static final int SENDMSG_NOOP = 1;
94    /** If the msg is already queued, queue this one and leave the old. */
95    private static final int SENDMSG_QUEUE = 2;
96
97    // AudioHandler message.whats
98    private static final int MSG_SET_SYSTEM_VOLUME = 0;
99    private static final int MSG_PERSIST_VOLUME = 1;
100    private static final int MSG_PERSIST_RINGER_MODE = 3;
101    private static final int MSG_PERSIST_VIBRATE_SETTING = 4;
102    private static final int MSG_MEDIA_SERVER_DIED = 5;
103    private static final int MSG_MEDIA_SERVER_STARTED = 6;
104    private static final int MSG_PLAY_SOUND_EFFECT = 7;
105
106    /** @see AudioSystemThread */
107    private AudioSystemThread mAudioSystemThread;
108    /** @see AudioHandler */
109    private AudioHandler mAudioHandler;
110    /** @see VolumeStreamState */
111    private VolumeStreamState[] mStreamStates;
112    private SettingsObserver mSettingsObserver;
113
114    private int mMode;
115    private Object mSettingsLock = new Object();
116    private boolean mMediaServerOk;
117
118    private SoundPool mSoundPool;
119    private Object mSoundEffectsLock = new Object();
120    private static final int NUM_SOUNDPOOL_CHANNELS = 4;
121    private static final int SOUND_EFFECT_VOLUME = 1000;
122
123    /* Sound effect file names  */
124    private static final String SOUND_EFFECTS_PATH = "/media/audio/ui/";
125    private static final String[] SOUND_EFFECT_FILES = new String[] {
126        "Effect_Tick.ogg",
127        "KeypressStandard.ogg",
128        "KeypressSpacebar.ogg",
129        "KeypressDelete.ogg",
130        "KeypressReturn.ogg"
131    };
132
133    /* Sound effect file name mapping sound effect id (AudioManager.FX_xxx) to
134     * file index in SOUND_EFFECT_FILES[] (first column) and indicating if effect
135     * uses soundpool (second column) */
136    private int[][] SOUND_EFFECT_FILES_MAP = new int[][] {
137        {0, -1},  // FX_KEY_CLICK
138        {0, -1},  // FX_FOCUS_NAVIGATION_UP
139        {0, -1},  // FX_FOCUS_NAVIGATION_DOWN
140        {0, -1},  // FX_FOCUS_NAVIGATION_LEFT
141        {0, -1},  // FX_FOCUS_NAVIGATION_RIGHT
142        {1, -1},  // FX_KEYPRESS_STANDARD
143        {2, -1},  // FX_KEYPRESS_SPACEBAR
144        {3, -1},  // FX_FOCUS_DELETE
145        {4, -1}   // FX_FOCUS_RETURN
146    };
147
148   /** @hide Maximum volume index values for audio streams */
149    private int[] MAX_STREAM_VOLUME = new int[] {
150        5,  // STREAM_VOICE_CALL
151        7,  // STREAM_SYSTEM
152        7,  // STREAM_RING
153        15, // STREAM_MUSIC
154        7,  // STREAM_ALARM
155        7,  // STREAM_NOTIFICATION
156        15, // STREAM_BLUETOOTH_SCO
157        7,  // STREAM_SYSTEM_ENFORCED
158        15, // STREAM_DTMF
159        15  // STREAM_TTS
160    };
161    /* STREAM_VOLUME_ALIAS[] indicates for each stream if it uses the volume settings
162     * of another stream: This avoids multiplying the volume settings for hidden
163     * stream types that follow other stream behavior for volume settings
164     * NOTE: do not create loops in aliases! */
165    private int[] STREAM_VOLUME_ALIAS = new int[] {
166        AudioSystem.STREAM_VOICE_CALL,  // STREAM_VOICE_CALL
167        AudioSystem.STREAM_SYSTEM,  // STREAM_SYSTEM
168        AudioSystem.STREAM_RING,  // STREAM_RING
169        AudioSystem.STREAM_MUSIC, // STREAM_MUSIC
170        AudioSystem.STREAM_ALARM,  // STREAM_ALARM
171        AudioSystem.STREAM_NOTIFICATION,  // STREAM_NOTIFICATION
172        AudioSystem.STREAM_BLUETOOTH_SCO, // STREAM_BLUETOOTH_SCO
173        AudioSystem.STREAM_SYSTEM,  // STREAM_SYSTEM_ENFORCED
174        AudioSystem.STREAM_VOICE_CALL, // STREAM_DTMF
175        AudioSystem.STREAM_MUSIC  // STREAM_TTS
176    };
177
178    private AudioSystem.ErrorCallback mAudioSystemCallback = new AudioSystem.ErrorCallback() {
179        public void onError(int error) {
180            switch (error) {
181            case AudioSystem.AUDIO_STATUS_SERVER_DIED:
182                if (mMediaServerOk) {
183                    sendMsg(mAudioHandler, MSG_MEDIA_SERVER_DIED, SHARED_MSG, SENDMSG_NOOP, 0, 0,
184                            null, 1500);
185                    mMediaServerOk = false;
186                }
187                break;
188            case AudioSystem.AUDIO_STATUS_OK:
189                if (!mMediaServerOk) {
190                    sendMsg(mAudioHandler, MSG_MEDIA_SERVER_STARTED, SHARED_MSG, SENDMSG_NOOP, 0, 0,
191                            null, 0);
192                    mMediaServerOk = true;
193                }
194                break;
195            default:
196                break;
197            }
198       }
199    };
200
201    /**
202     * Current ringer mode from one of {@link AudioManager#RINGER_MODE_NORMAL},
203     * {@link AudioManager#RINGER_MODE_SILENT}, or
204     * {@link AudioManager#RINGER_MODE_VIBRATE}.
205     */
206    private int mRingerMode;
207
208    /** @see System#MODE_RINGER_STREAMS_AFFECTED */
209    private int mRingerModeAffectedStreams;
210
211    /** @see System#MUTE_STREAMS_AFFECTED */
212    private int mMuteAffectedStreams;
213
214    /**
215     * Has multiple bits per vibrate type to indicate the type's vibrate
216     * setting. See {@link #setVibrateSetting(int, int)}.
217     * <p>
218     * NOTE: This is not the final decision of whether vibrate is on/off for the
219     * type since it depends on the ringer mode. See {@link #shouldVibrate(int)}.
220     */
221    private int mVibrateSetting;
222
223    /** @see System#NOTIFICATIONS_USE_RING_VOLUME */
224    private int mNotificationsUseRingVolume;
225
226    // Broadcast receiver for device connections intent broadcasts
227    private final BroadcastReceiver mReceiver = new AudioServiceBroadcastReceiver();
228
229    //  Broadcast receiver for media button broadcasts (separate from mReceiver to
230    //  independently change its priority)
231    private final BroadcastReceiver mMediaButtonReceiver = new MediaButtonBroadcastReceiver();
232
233    // Devices currently connected
234    private HashMap <Integer, String> mConnectedDevices = new HashMap <Integer, String>();
235
236    // Forced device usage for communications
237    private int mForcedUseForComm;
238
239    // List of binder death handlers for setMode() client processes.
240    // The last process to have called setMode() is at the top of the list.
241    private ArrayList <SetModeDeathHandler> mSetModeDeathHandlers = new ArrayList <SetModeDeathHandler>();
242
243    // List of clients having issued a SCO start request
244    private ArrayList <ScoClient> mScoClients = new ArrayList <ScoClient>();
245
246    // BluetoothHeadset API to control SCO connection
247    private BluetoothHeadset mBluetoothHeadset;
248
249    // Bluetooth headset connection state
250    private boolean mBluetoothHeadsetConnected;
251
252    ///////////////////////////////////////////////////////////////////////////
253    // Construction
254    ///////////////////////////////////////////////////////////////////////////
255
256    /** @hide */
257    public AudioService(Context context) {
258        mContext = context;
259        mContentResolver = context.getContentResolver();
260
261       // Intialized volume
262        MAX_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL] = SystemProperties.getInt(
263            "ro.config.vc_call_vol_steps",
264           MAX_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL]);
265
266        mVolumePanel = new VolumePanel(context, this);
267        mSettingsObserver = new SettingsObserver();
268        mForcedUseForComm = AudioSystem.FORCE_NONE;
269        createAudioSystemThread();
270        readPersistedSettings();
271        createStreamStates();
272        // Call setMode() to initialize mSetModeDeathHandlers
273        mMode = AudioSystem.MODE_INVALID;
274        setMode(AudioSystem.MODE_NORMAL, null);
275        mMediaServerOk = true;
276        AudioSystem.setErrorCallback(mAudioSystemCallback);
277        loadSoundEffects();
278
279        mBluetoothHeadsetConnected = false;
280        mBluetoothHeadset = new BluetoothHeadset(context,
281                                                 mBluetoothHeadsetServiceListener);
282
283        // Register for device connection intent broadcasts.
284        IntentFilter intentFilter =
285                new IntentFilter(Intent.ACTION_HEADSET_PLUG);
286        intentFilter.addAction(BluetoothA2dp.ACTION_SINK_STATE_CHANGED);
287        intentFilter.addAction(BluetoothHeadset.ACTION_STATE_CHANGED);
288        intentFilter.addAction(Intent.ACTION_DOCK_EVENT);
289        intentFilter.addAction(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED);
290        context.registerReceiver(mReceiver, intentFilter);
291
292        // Register for media button intent broadcasts.
293        intentFilter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);
294        intentFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
295        context.registerReceiver(mMediaButtonReceiver, intentFilter);
296    }
297
298    private void createAudioSystemThread() {
299        mAudioSystemThread = new AudioSystemThread();
300        mAudioSystemThread.start();
301        waitForAudioHandlerCreation();
302    }
303
304    /** Waits for the volume handler to be created by the other thread. */
305    private void waitForAudioHandlerCreation() {
306        synchronized(this) {
307            while (mAudioHandler == null) {
308                try {
309                    // Wait for mAudioHandler to be set by the other thread
310                    wait();
311                } catch (InterruptedException e) {
312                    Log.e(TAG, "Interrupted while waiting on volume handler.");
313                }
314            }
315        }
316    }
317
318    private void createStreamStates() {
319        int numStreamTypes = AudioSystem.getNumStreamTypes();
320        VolumeStreamState[] streams = mStreamStates = new VolumeStreamState[numStreamTypes];
321
322        for (int i = 0; i < numStreamTypes; i++) {
323            streams[i] = new VolumeStreamState(System.VOLUME_SETTINGS[STREAM_VOLUME_ALIAS[i]], i);
324        }
325
326        // Correct stream index values for streams with aliases
327        for (int i = 0; i < numStreamTypes; i++) {
328            if (STREAM_VOLUME_ALIAS[i] != i) {
329                int index = rescaleIndex(streams[i].mIndex, STREAM_VOLUME_ALIAS[i], i);
330                streams[i].mIndex = streams[i].getValidIndex(index);
331                setStreamVolumeIndex(i, index);
332                index = rescaleIndex(streams[i].mLastAudibleIndex, STREAM_VOLUME_ALIAS[i], i);
333                streams[i].mLastAudibleIndex = streams[i].getValidIndex(index);
334            }
335        }
336    }
337
338    private void readPersistedSettings() {
339        final ContentResolver cr = mContentResolver;
340
341        mRingerMode = System.getInt(cr, System.MODE_RINGER, AudioManager.RINGER_MODE_NORMAL);
342
343        mVibrateSetting = System.getInt(cr, System.VIBRATE_ON, 0);
344
345        mRingerModeAffectedStreams = Settings.System.getInt(cr,
346                Settings.System.MODE_RINGER_STREAMS_AFFECTED,
347                ((1 << AudioSystem.STREAM_RING)|(1 << AudioSystem.STREAM_NOTIFICATION)|
348                 (1 << AudioSystem.STREAM_SYSTEM)|(1 << AudioSystem.STREAM_SYSTEM_ENFORCED)));
349
350        mMuteAffectedStreams = System.getInt(cr,
351                System.MUTE_STREAMS_AFFECTED,
352                ((1 << AudioSystem.STREAM_MUSIC)|(1 << AudioSystem.STREAM_RING)|(1 << AudioSystem.STREAM_SYSTEM)));
353
354        mNotificationsUseRingVolume = System.getInt(cr,
355                Settings.System.NOTIFICATIONS_USE_RING_VOLUME, 1);
356
357        if (mNotificationsUseRingVolume == 1) {
358            STREAM_VOLUME_ALIAS[AudioSystem.STREAM_NOTIFICATION] = AudioSystem.STREAM_RING;
359        }
360        // Each stream will read its own persisted settings
361
362        // Broadcast the sticky intent
363        broadcastRingerMode();
364
365        // Broadcast vibrate settings
366        broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_RINGER);
367        broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_NOTIFICATION);
368    }
369
370    private void setStreamVolumeIndex(int stream, int index) {
371        AudioSystem.setStreamVolumeIndex(stream, (index + 5)/10);
372    }
373
374    private int rescaleIndex(int index, int srcStream, int dstStream) {
375        return (index * mStreamStates[dstStream].getMaxIndex() + mStreamStates[srcStream].getMaxIndex() / 2) / mStreamStates[srcStream].getMaxIndex();
376    }
377
378    ///////////////////////////////////////////////////////////////////////////
379    // IPC methods
380    ///////////////////////////////////////////////////////////////////////////
381
382    /** @see AudioManager#adjustVolume(int, int) */
383    public void adjustVolume(int direction, int flags) {
384        adjustSuggestedStreamVolume(direction, AudioManager.USE_DEFAULT_STREAM_TYPE, flags);
385    }
386
387    /** @see AudioManager#adjustVolume(int, int, int) */
388    public void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags) {
389
390        int streamType = getActiveStreamType(suggestedStreamType);
391
392        // Don't play sound on other streams
393        if (streamType != AudioSystem.STREAM_RING && (flags & AudioManager.FLAG_PLAY_SOUND) != 0) {
394            flags &= ~AudioManager.FLAG_PLAY_SOUND;
395        }
396
397        adjustStreamVolume(streamType, direction, flags);
398    }
399
400    /** @see AudioManager#adjustStreamVolume(int, int, int) */
401    public void adjustStreamVolume(int streamType, int direction, int flags) {
402        ensureValidDirection(direction);
403        ensureValidStreamType(streamType);
404
405
406        VolumeStreamState streamState = mStreamStates[STREAM_VOLUME_ALIAS[streamType]];
407        final int oldIndex = streamState.mIndex;
408        boolean adjustVolume = true;
409
410        // If either the client forces allowing ringer modes for this adjustment,
411        // or the stream type is one that is affected by ringer modes
412        if ((flags & AudioManager.FLAG_ALLOW_RINGER_MODES) != 0
413                || streamType == AudioSystem.STREAM_RING) {
414            // Check if the ringer mode changes with this volume adjustment. If
415            // it does, it will handle adjusting the volume, so we won't below
416            adjustVolume = checkForRingerModeChange(oldIndex, direction);
417        }
418
419        if (adjustVolume && streamState.adjustIndex(direction)) {
420            // Post message to set system volume (it in turn will post a message
421            // to persist). Do not change volume if stream is muted.
422            if (streamState.muteCount() == 0) {
423                sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, STREAM_VOLUME_ALIAS[streamType], SENDMSG_NOOP, 0, 0,
424                        streamState, 0);
425            }
426        }
427
428        // UI
429        mVolumePanel.postVolumeChanged(streamType, flags);
430        // Broadcast Intent
431        sendVolumeUpdate(streamType, oldIndex, streamState.mIndex);
432    }
433
434    /** @see AudioManager#setStreamVolume(int, int, int) */
435    public void setStreamVolume(int streamType, int index, int flags) {
436        ensureValidStreamType(streamType);
437
438        final int oldIndex = mStreamStates[STREAM_VOLUME_ALIAS[streamType]].mIndex;
439
440        index = rescaleIndex(index * 10, streamType, STREAM_VOLUME_ALIAS[streamType]);
441        setStreamVolumeInt(STREAM_VOLUME_ALIAS[streamType], index, false, true);
442
443        // UI, etc.
444        mVolumePanel.postVolumeChanged(streamType, flags);
445        // Broadcast Intent
446        sendVolumeUpdate(streamType, oldIndex, index);
447    }
448
449    private void sendVolumeUpdate(int streamType, int oldIndex, int index) {
450        oldIndex = (oldIndex + 5) / 10;
451        index = (index + 5) / 10;
452
453        Intent intent = new Intent(AudioManager.VOLUME_CHANGED_ACTION);
454        intent.putExtra(AudioManager.EXTRA_VOLUME_STREAM_TYPE, streamType);
455        intent.putExtra(AudioManager.EXTRA_VOLUME_STREAM_VALUE, index);
456        intent.putExtra(AudioManager.EXTRA_PREV_VOLUME_STREAM_VALUE, oldIndex);
457
458        mContext.sendBroadcast(intent);
459    }
460
461    /**
462     * Sets the stream state's index, and posts a message to set system volume.
463     * This will not call out to the UI. Assumes a valid stream type.
464     *
465     * @param streamType Type of the stream
466     * @param index Desired volume index of the stream
467     * @param force If true, set the volume even if the desired volume is same
468     * as the current volume.
469     * @param lastAudible If true, stores new index as last audible one
470     */
471    private void setStreamVolumeInt(int streamType, int index, boolean force, boolean lastAudible) {
472        VolumeStreamState streamState = mStreamStates[streamType];
473        if (streamState.setIndex(index, lastAudible) || force) {
474            // Post message to set system volume (it in turn will post a message
475            // to persist).
476            // If stream is muted or we are in silent mode and stream is affected by ringer mode
477            // and the new volume is not 0, just persist the new volume but do not change
478            // current value
479            if (streamState.muteCount() == 0 &&
480                (mRingerMode == AudioManager.RINGER_MODE_NORMAL ||
481                !isStreamAffectedByRingerMode(streamType) ||
482                index == 0)) {
483                sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, streamType, SENDMSG_NOOP, 0, 0,
484                        streamState, 0);
485            } else {
486                // Post a persist volume msg
487                sendMsg(mAudioHandler, MSG_PERSIST_VOLUME, streamType,
488                        SENDMSG_REPLACE, 0, 1, streamState, PERSIST_DELAY);
489            }
490        }
491    }
492
493    /** @see AudioManager#setStreamSolo(int, boolean) */
494    public void setStreamSolo(int streamType, boolean state, IBinder cb) {
495        for (int stream = 0; stream < mStreamStates.length; stream++) {
496            if (!isStreamAffectedByMute(stream) || stream == streamType) continue;
497            // Bring back last audible volume
498            mStreamStates[stream].mute(cb, state);
499         }
500    }
501
502    /** @see AudioManager#setStreamMute(int, boolean) */
503    public void setStreamMute(int streamType, boolean state, IBinder cb) {
504        if (isStreamAffectedByMute(streamType)) {
505            mStreamStates[streamType].mute(cb, state);
506        }
507    }
508
509    /** @see AudioManager#getStreamVolume(int) */
510    public int getStreamVolume(int streamType) {
511        ensureValidStreamType(streamType);
512        return (mStreamStates[streamType].mIndex + 5) / 10;
513    }
514
515    /** @see AudioManager#getStreamMaxVolume(int) */
516    public int getStreamMaxVolume(int streamType) {
517        ensureValidStreamType(streamType);
518        return (mStreamStates[streamType].getMaxIndex() + 5) / 10;
519    }
520
521    /** @see AudioManager#getRingerMode() */
522    public int getRingerMode() {
523        return mRingerMode;
524    }
525
526    /** @see AudioManager#setRingerMode(int) */
527    public void setRingerMode(int ringerMode) {
528        synchronized (mSettingsLock) {
529            if (ringerMode != mRingerMode) {
530                setRingerModeInt(ringerMode, true);
531                // Send sticky broadcast
532                broadcastRingerMode();
533            }
534        }
535    }
536
537    private void setRingerModeInt(int ringerMode, boolean persist) {
538        mRingerMode = ringerMode;
539
540        // Adjust volumes via posting message
541        int numStreamTypes = AudioSystem.getNumStreamTypes();
542        if (mRingerMode == AudioManager.RINGER_MODE_NORMAL) {
543            for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
544                if (!isStreamAffectedByRingerMode(streamType)) continue;
545                // Bring back last audible volume
546                setStreamVolumeInt(streamType, mStreamStates[streamType].mLastAudibleIndex,
547                                   true, false);
548            }
549        } else {
550            for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
551                if (isStreamAffectedByRingerMode(streamType)) {
552                    // Either silent or vibrate, either way volume is 0
553                    setStreamVolumeInt(streamType, 0, false, false);
554                } else {
555                    // restore stream volume in the case the stream changed from affected
556                    // to non affected by ringer mode. Does not arm to do it for streams that
557                    // are not affected as well.
558                    setStreamVolumeInt(streamType, mStreamStates[streamType].mLastAudibleIndex,
559                            true, false);
560                }
561            }
562        }
563
564        // Post a persist ringer mode msg
565        if (persist) {
566            sendMsg(mAudioHandler, MSG_PERSIST_RINGER_MODE, SHARED_MSG,
567                    SENDMSG_REPLACE, 0, 0, null, PERSIST_DELAY);
568        }
569    }
570
571    /** @see AudioManager#shouldVibrate(int) */
572    public boolean shouldVibrate(int vibrateType) {
573
574        switch (getVibrateSetting(vibrateType)) {
575
576            case AudioManager.VIBRATE_SETTING_ON:
577                return mRingerMode != AudioManager.RINGER_MODE_SILENT;
578
579            case AudioManager.VIBRATE_SETTING_ONLY_SILENT:
580                return mRingerMode == AudioManager.RINGER_MODE_VIBRATE;
581
582            case AudioManager.VIBRATE_SETTING_OFF:
583                // Phone ringer should always vibrate in vibrate mode
584                if (vibrateType == AudioManager.VIBRATE_TYPE_RINGER) {
585                    return mRingerMode == AudioManager.RINGER_MODE_VIBRATE;
586                }
587
588            default:
589                return false;
590        }
591    }
592
593    /** @see AudioManager#getVibrateSetting(int) */
594    public int getVibrateSetting(int vibrateType) {
595        return (mVibrateSetting >> (vibrateType * 2)) & 3;
596    }
597
598    /** @see AudioManager#setVibrateSetting(int, int) */
599    public void setVibrateSetting(int vibrateType, int vibrateSetting) {
600
601        mVibrateSetting = getValueForVibrateSetting(mVibrateSetting, vibrateType, vibrateSetting);
602
603        // Broadcast change
604        broadcastVibrateSetting(vibrateType);
605
606        // Post message to set ringer mode (it in turn will post a message
607        // to persist)
608        sendMsg(mAudioHandler, MSG_PERSIST_VIBRATE_SETTING, SHARED_MSG, SENDMSG_NOOP, 0, 0,
609                null, 0);
610    }
611
612    /**
613     * @see #setVibrateSetting(int, int)
614     */
615    public static int getValueForVibrateSetting(int existingValue, int vibrateType,
616            int vibrateSetting) {
617
618        // First clear the existing setting. Each vibrate type has two bits in
619        // the value. Note '3' is '11' in binary.
620        existingValue &= ~(3 << (vibrateType * 2));
621
622        // Set into the old value
623        existingValue |= (vibrateSetting & 3) << (vibrateType * 2);
624
625        return existingValue;
626    }
627
628    private class SetModeDeathHandler implements IBinder.DeathRecipient {
629        private IBinder mCb; // To be notified of client's death
630        private int mMode = AudioSystem.MODE_NORMAL; // Current mode set by this client
631
632        SetModeDeathHandler(IBinder cb) {
633            mCb = cb;
634        }
635
636        public void binderDied() {
637            synchronized(mSetModeDeathHandlers) {
638                Log.w(TAG, "setMode() client died");
639                int index = mSetModeDeathHandlers.indexOf(this);
640                if (index < 0) {
641                    Log.w(TAG, "unregistered setMode() client died");
642                } else {
643                    mSetModeDeathHandlers.remove(this);
644                    // If dead client was a the top of client list,
645                    // apply next mode in the stack
646                    if (index == 0) {
647                        // mSetModeDeathHandlers is never empty as the initial entry
648                        // created when AudioService starts is never removed
649                        SetModeDeathHandler hdlr = mSetModeDeathHandlers.get(0);
650                        int mode = hdlr.getMode();
651                        if (AudioService.this.mMode != mode) {
652                            if (AudioSystem.setPhoneState(mode) == AudioSystem.AUDIO_STATUS_OK) {
653                                AudioService.this.mMode = mode;
654                            }
655                        }
656                    }
657                }
658            }
659        }
660
661        public void setMode(int mode) {
662            mMode = mode;
663        }
664
665        public int getMode() {
666            return mMode;
667        }
668
669        public IBinder getBinder() {
670            return mCb;
671        }
672    }
673
674    /** @see AudioManager#setMode(int) */
675    public void setMode(int mode, IBinder cb) {
676        if (!checkAudioSettingsPermission("setMode()")) {
677            return;
678        }
679
680        if (mode < AudioSystem.MODE_CURRENT || mode > AudioSystem.MODE_IN_CALL) {
681            return;
682        }
683
684        synchronized (mSettingsLock) {
685            if (mode == AudioSystem.MODE_CURRENT) {
686                mode = mMode;
687            }
688            if (mode != mMode) {
689                if (AudioSystem.setPhoneState(mode) == AudioSystem.AUDIO_STATUS_OK) {
690                    mMode = mode;
691
692                    synchronized(mSetModeDeathHandlers) {
693                        SetModeDeathHandler hdlr = null;
694                        Iterator iter = mSetModeDeathHandlers.iterator();
695                        while (iter.hasNext()) {
696                            SetModeDeathHandler h = (SetModeDeathHandler)iter.next();
697                            if (h.getBinder() == cb) {
698                                hdlr = h;
699                                // Remove from client list so that it is re-inserted at top of list
700                                iter.remove();
701                                break;
702                            }
703                        }
704                        if (hdlr == null) {
705                            hdlr = new SetModeDeathHandler(cb);
706                            // cb is null when setMode() is called by AudioService constructor
707                            if (cb != null) {
708                                // Register for client death notification
709                                try {
710                                    cb.linkToDeath(hdlr, 0);
711                                } catch (RemoteException e) {
712                                    // Client has died!
713                                    Log.w(TAG, "setMode() could not link to "+cb+" binder death");
714                                }
715                            }
716                        }
717                        // Last client to call setMode() is always at top of client list
718                        // as required by SetModeDeathHandler.binderDied()
719                        mSetModeDeathHandlers.add(0, hdlr);
720                        hdlr.setMode(mode);
721                    }
722
723                    if (mode != AudioSystem.MODE_NORMAL) {
724                        clearAllScoClients();
725                    }
726                }
727            }
728            int streamType = getActiveStreamType(AudioManager.USE_DEFAULT_STREAM_TYPE);
729            int index = mStreamStates[STREAM_VOLUME_ALIAS[streamType]].mIndex;
730            setStreamVolumeInt(STREAM_VOLUME_ALIAS[streamType], index, true, true);
731        }
732    }
733
734    /** @see AudioManager#getMode() */
735    public int getMode() {
736        return mMode;
737    }
738
739    /** @see AudioManager#playSoundEffect(int) */
740    public void playSoundEffect(int effectType) {
741        sendMsg(mAudioHandler, MSG_PLAY_SOUND_EFFECT, SHARED_MSG, SENDMSG_NOOP,
742                effectType, -1, null, 0);
743    }
744
745    /** @see AudioManager#playSoundEffect(int, float) */
746    public void playSoundEffectVolume(int effectType, float volume) {
747        loadSoundEffects();
748        sendMsg(mAudioHandler, MSG_PLAY_SOUND_EFFECT, SHARED_MSG, SENDMSG_NOOP,
749                effectType, (int) (volume * 1000), null, 0);
750    }
751
752    /**
753     * Loads samples into the soundpool.
754     * This method must be called at when sound effects are enabled
755     */
756    public boolean loadSoundEffects() {
757        synchronized (mSoundEffectsLock) {
758            if (mSoundPool != null) {
759                return true;
760            }
761            mSoundPool = new SoundPool(NUM_SOUNDPOOL_CHANNELS, AudioSystem.STREAM_SYSTEM, 0);
762            if (mSoundPool == null) {
763                return false;
764            }
765            /*
766             * poolId table: The value -1 in this table indicates that corresponding
767             * file (same index in SOUND_EFFECT_FILES[] has not been loaded.
768             * Once loaded, the value in poolId is the sample ID and the same
769             * sample can be reused for another effect using the same file.
770             */
771            int[] poolId = new int[SOUND_EFFECT_FILES.length];
772            for (int fileIdx = 0; fileIdx < SOUND_EFFECT_FILES.length; fileIdx++) {
773                poolId[fileIdx] = -1;
774            }
775            /*
776             * Effects whose value in SOUND_EFFECT_FILES_MAP[effect][1] is -1 must be loaded.
777             * If load succeeds, value in SOUND_EFFECT_FILES_MAP[effect][1] is > 0:
778             * this indicates we have a valid sample loaded for this effect.
779             */
780            for (int effect = 0; effect < AudioManager.NUM_SOUND_EFFECTS; effect++) {
781                // Do not load sample if this effect uses the MediaPlayer
782                if (SOUND_EFFECT_FILES_MAP[effect][1] == 0) {
783                    continue;
784                }
785                if (poolId[SOUND_EFFECT_FILES_MAP[effect][0]] == -1) {
786                    String filePath = Environment.getRootDirectory() + SOUND_EFFECTS_PATH + SOUND_EFFECT_FILES[SOUND_EFFECT_FILES_MAP[effect][0]];
787                    int sampleId = mSoundPool.load(filePath, 0);
788                    SOUND_EFFECT_FILES_MAP[effect][1] = sampleId;
789                    poolId[SOUND_EFFECT_FILES_MAP[effect][0]] = sampleId;
790                    if (sampleId <= 0) {
791                        Log.w(TAG, "Soundpool could not load file: "+filePath);
792                    }
793                } else {
794                    SOUND_EFFECT_FILES_MAP[effect][1] = poolId[SOUND_EFFECT_FILES_MAP[effect][0]];
795                }
796            }
797        }
798
799        return true;
800    }
801
802    /**
803     *  Unloads samples from the sound pool.
804     *  This method can be called to free some memory when
805     *  sound effects are disabled.
806     */
807    public void unloadSoundEffects() {
808        synchronized (mSoundEffectsLock) {
809            if (mSoundPool == null) {
810                return;
811            }
812            int[] poolId = new int[SOUND_EFFECT_FILES.length];
813            for (int fileIdx = 0; fileIdx < SOUND_EFFECT_FILES.length; fileIdx++) {
814                poolId[fileIdx] = 0;
815            }
816
817            for (int effect = 0; effect < AudioManager.NUM_SOUND_EFFECTS; effect++) {
818                if (SOUND_EFFECT_FILES_MAP[effect][1] <= 0) {
819                    continue;
820                }
821                if (poolId[SOUND_EFFECT_FILES_MAP[effect][0]] == 0) {
822                    mSoundPool.unload(SOUND_EFFECT_FILES_MAP[effect][1]);
823                    SOUND_EFFECT_FILES_MAP[effect][1] = -1;
824                    poolId[SOUND_EFFECT_FILES_MAP[effect][0]] = -1;
825                }
826            }
827            mSoundPool = null;
828        }
829    }
830
831    /** @see AudioManager#reloadAudioSettings() */
832    public void reloadAudioSettings() {
833        // restore ringer mode, ringer mode affected streams, mute affected streams and vibrate settings
834        readPersistedSettings();
835
836        // restore volume settings
837        int numStreamTypes = AudioSystem.getNumStreamTypes();
838        for (int streamType = 0; streamType < numStreamTypes; streamType++) {
839            VolumeStreamState streamState = mStreamStates[streamType];
840
841            String settingName = System.VOLUME_SETTINGS[STREAM_VOLUME_ALIAS[streamType]];
842            String lastAudibleSettingName = settingName + System.APPEND_FOR_LAST_AUDIBLE;
843            int index = Settings.System.getInt(mContentResolver,
844                                           settingName,
845                                           AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
846            if (STREAM_VOLUME_ALIAS[streamType] != streamType) {
847                index = rescaleIndex(index * 10, STREAM_VOLUME_ALIAS[streamType], streamType);
848            } else {
849                index *= 10;
850            }
851            streamState.mIndex = streamState.getValidIndex(index);
852
853            index = (index + 5) / 10;
854            index = Settings.System.getInt(mContentResolver,
855                                            lastAudibleSettingName,
856                                            (index > 0) ? index : AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
857            if (STREAM_VOLUME_ALIAS[streamType] != streamType) {
858                index = rescaleIndex(index * 10, STREAM_VOLUME_ALIAS[streamType], streamType);
859            } else {
860                index *= 10;
861            }
862            streamState.mLastAudibleIndex = streamState.getValidIndex(index);
863
864            // unmute stream that whas muted but is not affect by mute anymore
865            if (streamState.muteCount() != 0 && !isStreamAffectedByMute(streamType)) {
866                int size = streamState.mDeathHandlers.size();
867                for (int i = 0; i < size; i++) {
868                    streamState.mDeathHandlers.get(i).mMuteCount = 1;
869                    streamState.mDeathHandlers.get(i).mute(false);
870                }
871            }
872            // apply stream volume
873            if (streamState.muteCount() == 0) {
874                setStreamVolumeIndex(streamType, streamState.mIndex);
875            }
876        }
877
878        // apply new ringer mode
879        setRingerModeInt(getRingerMode(), false);
880    }
881
882    /** @see AudioManager#setSpeakerphoneOn() */
883    public void setSpeakerphoneOn(boolean on){
884        if (!checkAudioSettingsPermission("setSpeakerphoneOn()")) {
885            return;
886        }
887        if (on) {
888            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_SPEAKER);
889            mForcedUseForComm = AudioSystem.FORCE_SPEAKER;
890        } else {
891            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_NONE);
892            mForcedUseForComm = AudioSystem.FORCE_NONE;
893        }
894    }
895
896    /** @see AudioManager#isSpeakerphoneOn() */
897    public boolean isSpeakerphoneOn() {
898        if (mForcedUseForComm == AudioSystem.FORCE_SPEAKER) {
899            return true;
900        } else {
901            return false;
902        }
903    }
904
905    /** @see AudioManager#setBluetoothScoOn() */
906    public void setBluetoothScoOn(boolean on){
907        if (!checkAudioSettingsPermission("setBluetoothScoOn()")) {
908            return;
909        }
910        if (on) {
911            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_BT_SCO);
912            AudioSystem.setForceUse(AudioSystem.FOR_RECORD, AudioSystem.FORCE_BT_SCO);
913            mForcedUseForComm = AudioSystem.FORCE_BT_SCO;
914        } else {
915            AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, AudioSystem.FORCE_NONE);
916            AudioSystem.setForceUse(AudioSystem.FOR_RECORD, AudioSystem.FORCE_NONE);
917            mForcedUseForComm = AudioSystem.FORCE_NONE;
918        }
919    }
920
921    /** @see AudioManager#isBluetoothScoOn() */
922    public boolean isBluetoothScoOn() {
923        if (mForcedUseForComm == AudioSystem.FORCE_BT_SCO) {
924            return true;
925        } else {
926            return false;
927        }
928    }
929
930    /** @see AudioManager#startBluetoothSco() */
931    public void startBluetoothSco(IBinder cb){
932        if (!checkAudioSettingsPermission("startBluetoothSco()")) {
933            return;
934        }
935        ScoClient client = getScoClient(cb);
936        client.incCount();
937    }
938
939    /** @see AudioManager#stopBluetoothSco() */
940    public void stopBluetoothSco(IBinder cb){
941        if (!checkAudioSettingsPermission("stopBluetoothSco()")) {
942            return;
943        }
944        ScoClient client = getScoClient(cb);
945        client.decCount();
946    }
947
948    private class ScoClient implements IBinder.DeathRecipient {
949        private IBinder mCb; // To be notified of client's death
950        private int mStartcount; // number of SCO connections started by this client
951
952        ScoClient(IBinder cb) {
953            mCb = cb;
954            mStartcount = 0;
955        }
956
957        public void binderDied() {
958            synchronized(mScoClients) {
959                Log.w(TAG, "SCO client died");
960                int index = mScoClients.indexOf(this);
961                if (index < 0) {
962                    Log.w(TAG, "unregistered SCO client died");
963                } else {
964                    clearCount(true);
965                    mScoClients.remove(this);
966                }
967            }
968        }
969
970        public void incCount() {
971            synchronized(mScoClients) {
972                requestScoState(BluetoothHeadset.AUDIO_STATE_CONNECTED);
973                if (mStartcount == 0) {
974                    try {
975                        mCb.linkToDeath(this, 0);
976                    } catch (RemoteException e) {
977                        // client has already died!
978                        Log.w(TAG, "ScoClient  incCount() could not link to "+mCb+" binder death");
979                    }
980                }
981                mStartcount++;
982            }
983        }
984
985        public void decCount() {
986            synchronized(mScoClients) {
987                if (mStartcount == 0) {
988                    Log.w(TAG, "ScoClient.decCount() already 0");
989                } else {
990                    mStartcount--;
991                    if (mStartcount == 0) {
992                        mCb.unlinkToDeath(this, 0);
993                    }
994                    requestScoState(BluetoothHeadset.AUDIO_STATE_DISCONNECTED);
995                }
996            }
997        }
998
999        public void clearCount(boolean stopSco) {
1000            synchronized(mScoClients) {
1001                mStartcount = 0;
1002                mCb.unlinkToDeath(this, 0);
1003                if (stopSco) {
1004                    requestScoState(BluetoothHeadset.AUDIO_STATE_DISCONNECTED);
1005                }
1006            }
1007        }
1008
1009        public int getCount() {
1010            return mStartcount;
1011        }
1012
1013        public IBinder getBinder() {
1014            return mCb;
1015        }
1016
1017        public int totalCount() {
1018            synchronized(mScoClients) {
1019                int count = 0;
1020                int size = mScoClients.size();
1021                for (int i = 0; i < size; i++) {
1022                    count += mScoClients.get(i).getCount();
1023                }
1024                return count;
1025            }
1026        }
1027
1028        private void requestScoState(int state) {
1029            if (totalCount() == 0 &&
1030                mBluetoothHeadsetConnected &&
1031                AudioService.this.mMode == AudioSystem.MODE_NORMAL) {
1032                if (state == BluetoothHeadset.AUDIO_STATE_CONNECTED) {
1033                    mBluetoothHeadset.startVoiceRecognition();
1034                } else {
1035                    mBluetoothHeadset.stopVoiceRecognition();
1036                }
1037            }
1038        }
1039    }
1040
1041    public ScoClient getScoClient(IBinder cb) {
1042        synchronized(mScoClients) {
1043            ScoClient client;
1044            int size = mScoClients.size();
1045            for (int i = 0; i < size; i++) {
1046                client = mScoClients.get(i);
1047                if (client.getBinder() == cb)
1048                    return client;
1049            }
1050            client = new ScoClient(cb);
1051            mScoClients.add(client);
1052            return client;
1053        }
1054    }
1055
1056    public void clearAllScoClients() {
1057        synchronized(mScoClients) {
1058            int size = mScoClients.size();
1059            for (int i = 0; i < size; i++) {
1060                mScoClients.get(i).clearCount(false);
1061            }
1062        }
1063    }
1064
1065    private BluetoothHeadset.ServiceListener mBluetoothHeadsetServiceListener =
1066        new BluetoothHeadset.ServiceListener() {
1067        public void onServiceConnected() {
1068            if (mBluetoothHeadset != null &&
1069                mBluetoothHeadset.getState() == BluetoothHeadset.STATE_CONNECTED) {
1070                mBluetoothHeadsetConnected = true;
1071            }
1072        }
1073        public void onServiceDisconnected() {
1074            if (mBluetoothHeadset != null &&
1075                mBluetoothHeadset.getState() == BluetoothHeadset.STATE_DISCONNECTED) {
1076                mBluetoothHeadsetConnected = false;
1077                clearAllScoClients();
1078            }
1079        }
1080    };
1081
1082    ///////////////////////////////////////////////////////////////////////////
1083    // Internal methods
1084    ///////////////////////////////////////////////////////////////////////////
1085
1086    /**
1087     * Checks if the adjustment should change ringer mode instead of just
1088     * adjusting volume. If so, this will set the proper ringer mode and volume
1089     * indices on the stream states.
1090     */
1091    private boolean checkForRingerModeChange(int oldIndex, int direction) {
1092        boolean adjustVolumeIndex = true;
1093        int newRingerMode = mRingerMode;
1094
1095        if (mRingerMode == AudioManager.RINGER_MODE_NORMAL) {
1096            // audible mode, at the bottom of the scale
1097            if (direction == AudioManager.ADJUST_LOWER
1098                    && (oldIndex + 5) / 10 == 1) {
1099                // "silent mode", but which one?
1100                newRingerMode = System.getInt(mContentResolver, System.VIBRATE_IN_SILENT, 1) == 1
1101                    ? AudioManager.RINGER_MODE_VIBRATE
1102                    : AudioManager.RINGER_MODE_SILENT;
1103            }
1104        } else {
1105            if (direction == AudioManager.ADJUST_RAISE) {
1106                // exiting silent mode
1107                newRingerMode = AudioManager.RINGER_MODE_NORMAL;
1108            }
1109        }
1110
1111        if (newRingerMode != mRingerMode) {
1112            setRingerMode(newRingerMode);
1113
1114            /*
1115             * If we are changing ringer modes, do not increment/decrement the
1116             * volume index. Instead, the handler for the message above will
1117             * take care of changing the index.
1118             */
1119            adjustVolumeIndex = false;
1120        }
1121
1122        return adjustVolumeIndex;
1123    }
1124
1125    public boolean isStreamAffectedByRingerMode(int streamType) {
1126        return (mRingerModeAffectedStreams & (1 << streamType)) != 0;
1127    }
1128
1129    public boolean isStreamAffectedByMute(int streamType) {
1130        return (mMuteAffectedStreams & (1 << streamType)) != 0;
1131    }
1132
1133    private void ensureValidDirection(int direction) {
1134        if (direction < AudioManager.ADJUST_LOWER || direction > AudioManager.ADJUST_RAISE) {
1135            throw new IllegalArgumentException("Bad direction " + direction);
1136        }
1137    }
1138
1139    private void ensureValidStreamType(int streamType) {
1140        if (streamType < 0 || streamType >= mStreamStates.length) {
1141            throw new IllegalArgumentException("Bad stream type " + streamType);
1142        }
1143    }
1144
1145    private int getActiveStreamType(int suggestedStreamType) {
1146        boolean isOffhook = false;
1147        try {
1148            ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
1149            if (phone != null) isOffhook = phone.isOffhook();
1150        } catch (RemoteException e) {
1151            Log.w(TAG, "Couldn't connect to phone service", e);
1152        }
1153
1154        if (AudioSystem.getForceUse(AudioSystem.FOR_COMMUNICATION) == AudioSystem.FORCE_BT_SCO) {
1155            // Log.v(TAG, "getActiveStreamType: Forcing STREAM_BLUETOOTH_SCO...");
1156            return AudioSystem.STREAM_BLUETOOTH_SCO;
1157        } else if (isOffhook || AudioSystem.isStreamActive(AudioSystem.STREAM_VOICE_CALL)) {
1158            // Log.v(TAG, "getActiveStreamType: Forcing STREAM_VOICE_CALL...");
1159            return AudioSystem.STREAM_VOICE_CALL;
1160        } else if (AudioSystem.isStreamActive(AudioSystem.STREAM_MUSIC)) {
1161            // Log.v(TAG, "getActiveStreamType: Forcing STREAM_MUSIC...");
1162            return AudioSystem.STREAM_MUSIC;
1163        } else if (suggestedStreamType == AudioManager.USE_DEFAULT_STREAM_TYPE) {
1164            // Log.v(TAG, "getActiveStreamType: Forcing STREAM_RING...");
1165            return AudioSystem.STREAM_RING;
1166        } else {
1167            // Log.v(TAG, "getActiveStreamType: Returning suggested type " + suggestedStreamType);
1168            return suggestedStreamType;
1169        }
1170    }
1171
1172    private void broadcastRingerMode() {
1173        // Send sticky broadcast
1174        Intent broadcast = new Intent(AudioManager.RINGER_MODE_CHANGED_ACTION);
1175        broadcast.putExtra(AudioManager.EXTRA_RINGER_MODE, mRingerMode);
1176        broadcast.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT
1177                | Intent.FLAG_RECEIVER_REPLACE_PENDING);
1178        long origCallerIdentityToken = Binder.clearCallingIdentity();
1179        mContext.sendStickyBroadcast(broadcast);
1180        Binder.restoreCallingIdentity(origCallerIdentityToken);
1181    }
1182
1183    private void broadcastVibrateSetting(int vibrateType) {
1184        // Send broadcast
1185        if (ActivityManagerNative.isSystemReady()) {
1186            Intent broadcast = new Intent(AudioManager.VIBRATE_SETTING_CHANGED_ACTION);
1187            broadcast.putExtra(AudioManager.EXTRA_VIBRATE_TYPE, vibrateType);
1188            broadcast.putExtra(AudioManager.EXTRA_VIBRATE_SETTING, getVibrateSetting(vibrateType));
1189            mContext.sendBroadcast(broadcast);
1190        }
1191    }
1192
1193    // Message helper methods
1194    private static int getMsg(int baseMsg, int streamType) {
1195        return (baseMsg & 0xffff) | streamType << 16;
1196    }
1197
1198    private static int getMsgBase(int msg) {
1199        return msg & 0xffff;
1200    }
1201
1202    private static void sendMsg(Handler handler, int baseMsg, int streamType,
1203            int existingMsgPolicy, int arg1, int arg2, Object obj, int delay) {
1204        int msg = (streamType == SHARED_MSG) ? baseMsg : getMsg(baseMsg, streamType);
1205
1206        if (existingMsgPolicy == SENDMSG_REPLACE) {
1207            handler.removeMessages(msg);
1208        } else if (existingMsgPolicy == SENDMSG_NOOP && handler.hasMessages(msg)) {
1209            return;
1210        }
1211
1212        handler
1213                .sendMessageDelayed(handler.obtainMessage(msg, arg1, arg2, obj), delay);
1214    }
1215
1216    boolean checkAudioSettingsPermission(String method) {
1217        if (mContext.checkCallingOrSelfPermission("android.permission.MODIFY_AUDIO_SETTINGS")
1218                == PackageManager.PERMISSION_GRANTED) {
1219            return true;
1220        }
1221        String msg = "Audio Settings Permission Denial: " + method + " from pid="
1222                + Binder.getCallingPid()
1223                + ", uid=" + Binder.getCallingUid();
1224        Log.w(TAG, msg);
1225        return false;
1226    }
1227
1228
1229    ///////////////////////////////////////////////////////////////////////////
1230    // Inner classes
1231    ///////////////////////////////////////////////////////////////////////////
1232
1233    public class VolumeStreamState {
1234        private final int mStreamType;
1235
1236        private String mVolumeIndexSettingName;
1237        private String mLastAudibleVolumeIndexSettingName;
1238        private int mIndexMax;
1239        private int mIndex;
1240        private int mLastAudibleIndex;
1241        private ArrayList<VolumeDeathHandler> mDeathHandlers; //handles mute/solo requests client death
1242
1243        private VolumeStreamState(String settingName, int streamType) {
1244
1245            setVolumeIndexSettingName(settingName);
1246
1247            mStreamType = streamType;
1248
1249            final ContentResolver cr = mContentResolver;
1250            mIndexMax = MAX_STREAM_VOLUME[streamType];
1251            mIndex = Settings.System.getInt(cr,
1252                                            mVolumeIndexSettingName,
1253                                            AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
1254            mLastAudibleIndex = Settings.System.getInt(cr,
1255                                                       mLastAudibleVolumeIndexSettingName,
1256                                                       (mIndex > 0) ? mIndex : AudioManager.DEFAULT_STREAM_VOLUME[streamType]);
1257            AudioSystem.initStreamVolume(streamType, 0, mIndexMax);
1258            mIndexMax *= 10;
1259            mIndex = getValidIndex(10 * mIndex);
1260            mLastAudibleIndex = getValidIndex(10 * mLastAudibleIndex);
1261            setStreamVolumeIndex(streamType, mIndex);
1262            mDeathHandlers = new ArrayList<VolumeDeathHandler>();
1263        }
1264
1265        public void setVolumeIndexSettingName(String settingName) {
1266            mVolumeIndexSettingName = settingName;
1267            mLastAudibleVolumeIndexSettingName = settingName + System.APPEND_FOR_LAST_AUDIBLE;
1268        }
1269
1270        public boolean adjustIndex(int deltaIndex) {
1271            return setIndex(mIndex + deltaIndex * 10, true);
1272        }
1273
1274        public boolean setIndex(int index, boolean lastAudible) {
1275            int oldIndex = mIndex;
1276            mIndex = getValidIndex(index);
1277
1278            if (oldIndex != mIndex) {
1279                if (lastAudible) {
1280                    mLastAudibleIndex = mIndex;
1281                }
1282                // Apply change to all streams using this one as alias
1283                int numStreamTypes = AudioSystem.getNumStreamTypes();
1284                for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
1285                    if (streamType != mStreamType && STREAM_VOLUME_ALIAS[streamType] == mStreamType) {
1286                        mStreamStates[streamType].setIndex(rescaleIndex(mIndex, mStreamType, streamType), lastAudible);
1287                    }
1288                }
1289                return true;
1290            } else {
1291                return false;
1292            }
1293        }
1294
1295        public int getMaxIndex() {
1296            return mIndexMax;
1297        }
1298
1299        public void mute(IBinder cb, boolean state) {
1300            VolumeDeathHandler handler = getDeathHandler(cb, state);
1301            if (handler == null) {
1302                Log.e(TAG, "Could not get client death handler for stream: "+mStreamType);
1303                return;
1304            }
1305            handler.mute(state);
1306        }
1307
1308        private int getValidIndex(int index) {
1309            if (index < 0) {
1310                return 0;
1311            } else if (index > mIndexMax) {
1312                return mIndexMax;
1313            }
1314
1315            return index;
1316        }
1317
1318        private class VolumeDeathHandler implements IBinder.DeathRecipient {
1319            private IBinder mICallback; // To be notified of client's death
1320            private int mMuteCount; // Number of active mutes for this client
1321
1322            VolumeDeathHandler(IBinder cb) {
1323                mICallback = cb;
1324            }
1325
1326            public void mute(boolean state) {
1327                synchronized(mDeathHandlers) {
1328                    if (state) {
1329                        if (mMuteCount == 0) {
1330                            // Register for client death notification
1331                            try {
1332                                mICallback.linkToDeath(this, 0);
1333                                mDeathHandlers.add(this);
1334                                // If the stream is not yet muted by any client, set lvel to 0
1335                                if (muteCount() == 0) {
1336                                    setIndex(0, false);
1337                                    sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, mStreamType, SENDMSG_NOOP, 0, 0,
1338                                            VolumeStreamState.this, 0);
1339                                }
1340                            } catch (RemoteException e) {
1341                                // Client has died!
1342                                binderDied();
1343                                mDeathHandlers.notify();
1344                                return;
1345                            }
1346                        } else {
1347                            Log.w(TAG, "stream: "+mStreamType+" was already muted by this client");
1348                        }
1349                        mMuteCount++;
1350                    } else {
1351                        if (mMuteCount == 0) {
1352                            Log.e(TAG, "unexpected unmute for stream: "+mStreamType);
1353                        } else {
1354                            mMuteCount--;
1355                            if (mMuteCount == 0) {
1356                                // Unregistr from client death notification
1357                                mDeathHandlers.remove(this);
1358                                mICallback.unlinkToDeath(this, 0);
1359                                if (muteCount() == 0) {
1360                                    // If the stream is not mut any more, restore it's volume if
1361                                    // ringer mode allows it
1362                                    if (!isStreamAffectedByRingerMode(mStreamType) || mRingerMode == AudioManager.RINGER_MODE_NORMAL) {
1363                                        setIndex(mLastAudibleIndex, false);
1364                                        sendMsg(mAudioHandler, MSG_SET_SYSTEM_VOLUME, mStreamType, SENDMSG_NOOP, 0, 0,
1365                                                VolumeStreamState.this, 0);
1366                                    }
1367                                }
1368                            }
1369                        }
1370                    }
1371                    mDeathHandlers.notify();
1372                }
1373            }
1374
1375            public void binderDied() {
1376                Log.w(TAG, "Volume service client died for stream: "+mStreamType);
1377                if (mMuteCount != 0) {
1378                    // Reset all active mute requests from this client.
1379                    mMuteCount = 1;
1380                    mute(false);
1381                }
1382            }
1383        }
1384
1385        private int muteCount() {
1386            int count = 0;
1387            int size = mDeathHandlers.size();
1388            for (int i = 0; i < size; i++) {
1389                count += mDeathHandlers.get(i).mMuteCount;
1390            }
1391            return count;
1392        }
1393
1394        private VolumeDeathHandler getDeathHandler(IBinder cb, boolean state) {
1395            synchronized(mDeathHandlers) {
1396                VolumeDeathHandler handler;
1397                int size = mDeathHandlers.size();
1398                for (int i = 0; i < size; i++) {
1399                    handler = mDeathHandlers.get(i);
1400                    if (cb.equals(handler.mICallback)) {
1401                        return handler;
1402                    }
1403                }
1404                // If this is the first mute request for this client, create a new
1405                // client death handler. Otherwise, it is an out of sequence unmute request.
1406                if (state) {
1407                    handler = new VolumeDeathHandler(cb);
1408                } else {
1409                    Log.w(TAG, "stream was not muted by this client");
1410                    handler = null;
1411                }
1412                return handler;
1413            }
1414        }
1415    }
1416
1417    /** Thread that handles native AudioSystem control. */
1418    private class AudioSystemThread extends Thread {
1419        AudioSystemThread() {
1420            super("AudioService");
1421        }
1422
1423        @Override
1424        public void run() {
1425            // Set this thread up so the handler will work on it
1426            Looper.prepare();
1427
1428            synchronized(AudioService.this) {
1429                mAudioHandler = new AudioHandler();
1430
1431                // Notify that the handler has been created
1432                AudioService.this.notify();
1433            }
1434
1435            // Listen for volume change requests that are set by VolumePanel
1436            Looper.loop();
1437        }
1438    }
1439
1440    /** Handles internal volume messages in separate volume thread. */
1441    private class AudioHandler extends Handler {
1442
1443        private void setSystemVolume(VolumeStreamState streamState) {
1444
1445            // Adjust volume
1446            setStreamVolumeIndex(streamState.mStreamType, streamState.mIndex);
1447
1448            // Apply change to all streams using this one as alias
1449            int numStreamTypes = AudioSystem.getNumStreamTypes();
1450            for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
1451                if (streamType != streamState.mStreamType &&
1452                    STREAM_VOLUME_ALIAS[streamType] == streamState.mStreamType) {
1453                    setStreamVolumeIndex(streamType, mStreamStates[streamType].mIndex);
1454                }
1455            }
1456
1457            // Post a persist volume msg
1458            sendMsg(mAudioHandler, MSG_PERSIST_VOLUME, streamState.mStreamType,
1459                    SENDMSG_REPLACE, 1, 1, streamState, PERSIST_DELAY);
1460        }
1461
1462        private void persistVolume(VolumeStreamState streamState, boolean current, boolean lastAudible) {
1463            if (current) {
1464                System.putInt(mContentResolver, streamState.mVolumeIndexSettingName,
1465                              (streamState.mIndex + 5)/ 10);
1466            }
1467            if (lastAudible) {
1468                System.putInt(mContentResolver, streamState.mLastAudibleVolumeIndexSettingName,
1469                    (streamState.mLastAudibleIndex + 5) / 10);
1470            }
1471        }
1472
1473        private void persistRingerMode() {
1474            System.putInt(mContentResolver, System.MODE_RINGER, mRingerMode);
1475        }
1476
1477        private void persistVibrateSetting() {
1478            System.putInt(mContentResolver, System.VIBRATE_ON, mVibrateSetting);
1479        }
1480
1481        private void playSoundEffect(int effectType, int volume) {
1482            synchronized (mSoundEffectsLock) {
1483                if (mSoundPool == null) {
1484                    return;
1485                }
1486                float volFloat;
1487                // use STREAM_MUSIC volume attenuated by 3 dB if volume is not specified by caller
1488                if (volume < 0) {
1489                    // Same linear to log conversion as in native AudioSystem::linearToLog() (AudioSystem.cpp)
1490                    float dBPerStep = (float)((0.5 * 100) / MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC]);
1491                    int musicVolIndex = (mStreamStates[AudioSystem.STREAM_MUSIC].mIndex + 5) / 10;
1492                    float musicVoldB = dBPerStep * (musicVolIndex - MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC]);
1493                    volFloat = (float)Math.pow(10, (musicVoldB - 3)/20);
1494                } else {
1495                    volFloat = (float) volume / 1000.0f;
1496                }
1497
1498                if (SOUND_EFFECT_FILES_MAP[effectType][1] > 0) {
1499                    mSoundPool.play(SOUND_EFFECT_FILES_MAP[effectType][1], volFloat, volFloat, 0, 0, 1.0f);
1500                } else {
1501                    MediaPlayer mediaPlayer = new MediaPlayer();
1502                    if (mediaPlayer != null) {
1503                        try {
1504                            String filePath = Environment.getRootDirectory() + SOUND_EFFECTS_PATH + SOUND_EFFECT_FILES[SOUND_EFFECT_FILES_MAP[effectType][0]];
1505                            mediaPlayer.setDataSource(filePath);
1506                            mediaPlayer.setAudioStreamType(AudioSystem.STREAM_SYSTEM);
1507                            mediaPlayer.prepare();
1508                            mediaPlayer.setVolume(volFloat, volFloat);
1509                            mediaPlayer.setOnCompletionListener(new OnCompletionListener() {
1510                                public void onCompletion(MediaPlayer mp) {
1511                                    cleanupPlayer(mp);
1512                                }
1513                            });
1514                            mediaPlayer.setOnErrorListener(new OnErrorListener() {
1515                                public boolean onError(MediaPlayer mp, int what, int extra) {
1516                                    cleanupPlayer(mp);
1517                                    return true;
1518                                }
1519                            });
1520                            mediaPlayer.start();
1521                        } catch (IOException ex) {
1522                            Log.w(TAG, "MediaPlayer IOException: "+ex);
1523                        } catch (IllegalArgumentException ex) {
1524                            Log.w(TAG, "MediaPlayer IllegalArgumentException: "+ex);
1525                        } catch (IllegalStateException ex) {
1526                            Log.w(TAG, "MediaPlayer IllegalStateException: "+ex);
1527                        }
1528                    }
1529                }
1530            }
1531        }
1532
1533        private void cleanupPlayer(MediaPlayer mp) {
1534            if (mp != null) {
1535                try {
1536                    mp.stop();
1537                    mp.release();
1538                } catch (IllegalStateException ex) {
1539                    Log.w(TAG, "MediaPlayer IllegalStateException: "+ex);
1540                }
1541            }
1542        }
1543
1544        @Override
1545        public void handleMessage(Message msg) {
1546            int baseMsgWhat = getMsgBase(msg.what);
1547
1548            switch (baseMsgWhat) {
1549
1550                case MSG_SET_SYSTEM_VOLUME:
1551                    setSystemVolume((VolumeStreamState) msg.obj);
1552                    break;
1553
1554                case MSG_PERSIST_VOLUME:
1555                    persistVolume((VolumeStreamState) msg.obj, (msg.arg1 != 0), (msg.arg2 != 0));
1556                    break;
1557
1558                case MSG_PERSIST_RINGER_MODE:
1559                    persistRingerMode();
1560                    break;
1561
1562                case MSG_PERSIST_VIBRATE_SETTING:
1563                    persistVibrateSetting();
1564                    break;
1565
1566                case MSG_MEDIA_SERVER_DIED:
1567                    // Force creation of new IAudioflinger interface
1568                    if (!mMediaServerOk) {
1569                        Log.e(TAG, "Media server died.");
1570                        AudioSystem.isStreamActive(AudioSystem.STREAM_MUSIC);
1571                        sendMsg(mAudioHandler, MSG_MEDIA_SERVER_DIED, SHARED_MSG, SENDMSG_NOOP, 0, 0,
1572                                null, 500);
1573                    }
1574                    break;
1575
1576                case MSG_MEDIA_SERVER_STARTED:
1577                    Log.e(TAG, "Media server started.");
1578                    // Restore device connection states
1579                    Set set = mConnectedDevices.entrySet();
1580                    Iterator i = set.iterator();
1581                    while(i.hasNext()){
1582                        Map.Entry device = (Map.Entry)i.next();
1583                        AudioSystem.setDeviceConnectionState(((Integer)device.getKey()).intValue(),
1584                                                             AudioSystem.DEVICE_STATE_AVAILABLE,
1585                                                             (String)device.getValue());
1586                    }
1587
1588                    // Restore call state
1589                    AudioSystem.setPhoneState(mMode);
1590
1591                    // Restore forced usage for communcations and record
1592                    AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, mForcedUseForComm);
1593                    AudioSystem.setForceUse(AudioSystem.FOR_RECORD, mForcedUseForComm);
1594
1595                    // Restore stream volumes
1596                    int numStreamTypes = AudioSystem.getNumStreamTypes();
1597                    for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
1598                        int index;
1599                        VolumeStreamState streamState = mStreamStates[streamType];
1600                        AudioSystem.initStreamVolume(streamType, 0, (streamState.mIndexMax + 5) / 10);
1601                        if (streamState.muteCount() == 0) {
1602                            index = streamState.mIndex;
1603                        } else {
1604                            index = 0;
1605                        }
1606                        setStreamVolumeIndex(streamType, index);
1607                    }
1608
1609                    // Restore ringer mode
1610                    setRingerModeInt(getRingerMode(), false);
1611                    break;
1612
1613                case MSG_PLAY_SOUND_EFFECT:
1614                    playSoundEffect(msg.arg1, msg.arg2);
1615                    break;
1616            }
1617        }
1618    }
1619
1620    private class SettingsObserver extends ContentObserver {
1621
1622        SettingsObserver() {
1623            super(new Handler());
1624            mContentResolver.registerContentObserver(Settings.System.getUriFor(
1625                Settings.System.MODE_RINGER_STREAMS_AFFECTED), false, this);
1626            mContentResolver.registerContentObserver(Settings.System.getUriFor(
1627                    Settings.System.NOTIFICATIONS_USE_RING_VOLUME), false, this);
1628        }
1629
1630        @Override
1631        public void onChange(boolean selfChange) {
1632            super.onChange(selfChange);
1633            synchronized (mSettingsLock) {
1634                int ringerModeAffectedStreams = Settings.System.getInt(mContentResolver,
1635                        Settings.System.MODE_RINGER_STREAMS_AFFECTED,
1636                        0);
1637                if (ringerModeAffectedStreams != mRingerModeAffectedStreams) {
1638                    /*
1639                     * Ensure all stream types that should be affected by ringer mode
1640                     * are in the proper state.
1641                     */
1642                    mRingerModeAffectedStreams = ringerModeAffectedStreams;
1643                    setRingerModeInt(getRingerMode(), false);
1644                }
1645
1646                int notificationsUseRingVolume = Settings.System.getInt(mContentResolver,
1647                        Settings.System.NOTIFICATIONS_USE_RING_VOLUME,
1648                        1);
1649                if (notificationsUseRingVolume != mNotificationsUseRingVolume) {
1650                    mNotificationsUseRingVolume = notificationsUseRingVolume;
1651                    if (mNotificationsUseRingVolume == 1) {
1652                        STREAM_VOLUME_ALIAS[AudioSystem.STREAM_NOTIFICATION] = AudioSystem.STREAM_RING;
1653                        mStreamStates[AudioSystem.STREAM_NOTIFICATION].setVolumeIndexSettingName(
1654                                System.VOLUME_SETTINGS[AudioSystem.STREAM_RING]);
1655                    } else {
1656                        STREAM_VOLUME_ALIAS[AudioSystem.STREAM_NOTIFICATION] = AudioSystem.STREAM_NOTIFICATION;
1657                        mStreamStates[AudioSystem.STREAM_NOTIFICATION].setVolumeIndexSettingName(
1658                                System.VOLUME_SETTINGS[AudioSystem.STREAM_NOTIFICATION]);
1659                        // Persist notification volume volume as it was not persisted while aliased to ring volume
1660                        //  and persist with no delay as there might be registered observers of the persisted
1661                        //  notification volume.
1662                        sendMsg(mAudioHandler, MSG_PERSIST_VOLUME, AudioSystem.STREAM_NOTIFICATION,
1663                                SENDMSG_REPLACE, 1, 1, mStreamStates[AudioSystem.STREAM_NOTIFICATION], 0);
1664                    }
1665                }
1666            }
1667        }
1668    }
1669
1670    /**
1671     * Receiver for misc intent broadcasts the Phone app cares about.
1672     */
1673    private class AudioServiceBroadcastReceiver extends BroadcastReceiver {
1674        @Override
1675        public void onReceive(Context context, Intent intent) {
1676            String action = intent.getAction();
1677
1678            if (action.equals(Intent.ACTION_DOCK_EVENT)) {
1679                int dockState = intent.getIntExtra(Intent.EXTRA_DOCK_STATE,
1680                        Intent.EXTRA_DOCK_STATE_UNDOCKED);
1681                int config;
1682                switch (dockState) {
1683                    case Intent.EXTRA_DOCK_STATE_DESK:
1684                        config = AudioSystem.FORCE_BT_DESK_DOCK;
1685                        break;
1686                    case Intent.EXTRA_DOCK_STATE_CAR:
1687                        config = AudioSystem.FORCE_BT_CAR_DOCK;
1688                        break;
1689                    case Intent.EXTRA_DOCK_STATE_UNDOCKED:
1690                    default:
1691                        config = AudioSystem.FORCE_NONE;
1692                }
1693                AudioSystem.setForceUse(AudioSystem.FOR_DOCK, config);
1694            } else if (action.equals(BluetoothA2dp.ACTION_SINK_STATE_CHANGED)) {
1695                int state = intent.getIntExtra(BluetoothA2dp.EXTRA_SINK_STATE,
1696                                               BluetoothA2dp.STATE_DISCONNECTED);
1697                BluetoothDevice btDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
1698                String address = btDevice.getAddress();
1699                boolean isConnected = (mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP) &&
1700                                       ((String)mConnectedDevices.get(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP)).equals(address));
1701
1702                if (isConnected &&
1703                    state != BluetoothA2dp.STATE_CONNECTED && state != BluetoothA2dp.STATE_PLAYING) {
1704                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP,
1705                            AudioSystem.DEVICE_STATE_UNAVAILABLE,
1706                            address);
1707                    mConnectedDevices.remove(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP);
1708                } else if (!isConnected &&
1709                             (state == BluetoothA2dp.STATE_CONNECTED ||
1710                              state == BluetoothA2dp.STATE_PLAYING)) {
1711                    AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP,
1712                                                         AudioSystem.DEVICE_STATE_AVAILABLE,
1713                                                         address);
1714                    // Reset A2DP suspend state each time a new sink is connected
1715                    AudioSystem.setParameters("A2dpSuspended=false");
1716                    mConnectedDevices.put( new Integer(AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP),
1717                            address);
1718                }
1719            } else if (action.equals(BluetoothHeadset.ACTION_STATE_CHANGED)) {
1720                int state = intent.getIntExtra(BluetoothHeadset.EXTRA_STATE,
1721                                               BluetoothHeadset.STATE_ERROR);
1722                int device = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO;
1723                BluetoothDevice btDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
1724                String address = null;
1725                if (btDevice != null) {
1726                    address = btDevice.getAddress();
1727                    BluetoothClass btClass = btDevice.getBluetoothClass();
1728                    if (btClass != null) {
1729                        switch (btClass.getDeviceClass()) {
1730                        case BluetoothClass.Device.AUDIO_VIDEO_WEARABLE_HEADSET:
1731                        case BluetoothClass.Device.AUDIO_VIDEO_HANDSFREE:
1732                            device = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
1733                            break;
1734                        case BluetoothClass.Device.AUDIO_VIDEO_CAR_AUDIO:
1735                            device = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
1736                            break;
1737                        }
1738                    }
1739                }
1740
1741                boolean isConnected = (mConnectedDevices.containsKey(device) &&
1742                                       ((String)mConnectedDevices.get(device)).equals(address));
1743
1744                if (isConnected && state != BluetoothHeadset.STATE_CONNECTED) {
1745                    AudioSystem.setDeviceConnectionState(device,
1746                                                         AudioSystem.DEVICE_STATE_UNAVAILABLE,
1747                                                         address);
1748                    mConnectedDevices.remove(device);
1749                    mBluetoothHeadsetConnected = false;
1750                    clearAllScoClients();
1751                } else if (!isConnected && state == BluetoothHeadset.STATE_CONNECTED) {
1752                    AudioSystem.setDeviceConnectionState(device,
1753                                                         AudioSystem.DEVICE_STATE_AVAILABLE,
1754                                                         address);
1755                    mConnectedDevices.put(new Integer(device), address);
1756                    mBluetoothHeadsetConnected = true;
1757                }
1758            } else if (action.equals(Intent.ACTION_HEADSET_PLUG)) {
1759                int state = intent.getIntExtra("state", 0);
1760                int microphone = intent.getIntExtra("microphone", 0);
1761
1762                if (microphone != 0) {
1763                    boolean isConnected = mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_WIRED_HEADSET);
1764                    if (state == 0 && isConnected) {
1765                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADSET,
1766                                AudioSystem.DEVICE_STATE_UNAVAILABLE,
1767                                "");
1768                        mConnectedDevices.remove(AudioSystem.DEVICE_OUT_WIRED_HEADSET);
1769                    } else if (state == 1 && !isConnected)  {
1770                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADSET,
1771                                AudioSystem.DEVICE_STATE_AVAILABLE,
1772                                "");
1773                        mConnectedDevices.put( new Integer(AudioSystem.DEVICE_OUT_WIRED_HEADSET), "");
1774                    }
1775                } else {
1776                    boolean isConnected = mConnectedDevices.containsKey(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE);
1777                    if (state == 0 && isConnected) {
1778                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE,
1779                                AudioSystem.DEVICE_STATE_UNAVAILABLE,
1780                                "");
1781                        mConnectedDevices.remove(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE);
1782                    } else if (state == 1 && !isConnected)  {
1783                        AudioSystem.setDeviceConnectionState(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE,
1784                                AudioSystem.DEVICE_STATE_AVAILABLE,
1785                                "");
1786                        mConnectedDevices.put( new Integer(AudioSystem.DEVICE_OUT_WIRED_HEADPHONE), "");
1787                    }
1788                }
1789            } else if (action.equals(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED)) {
1790                int state = intent.getIntExtra(BluetoothHeadset.EXTRA_AUDIO_STATE,
1791                                               BluetoothHeadset.STATE_ERROR);
1792                synchronized (mScoClients) {
1793                    if (!mScoClients.isEmpty()) {
1794                        switch (state) {
1795                        case BluetoothHeadset.AUDIO_STATE_CONNECTED:
1796                            state = AudioManager.SCO_AUDIO_STATE_CONNECTED;
1797                            break;
1798                        case BluetoothHeadset.AUDIO_STATE_DISCONNECTED:
1799                            state = AudioManager.SCO_AUDIO_STATE_DISCONNECTED;
1800                            break;
1801                        default:
1802                            state = AudioManager.SCO_AUDIO_STATE_ERROR;
1803                            break;
1804                        }
1805                        if (state != AudioManager.SCO_AUDIO_STATE_ERROR) {
1806                            Intent newIntent = new Intent(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED);
1807                            newIntent.putExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, state);
1808                            mContext.sendStickyBroadcast(newIntent);
1809                        }
1810                    }
1811                }
1812            }
1813        }
1814    }
1815
1816    //==========================================================================================
1817    // AudioFocus
1818    //==========================================================================================
1819    private static class FocusStackEntry {
1820        public int mStreamType = -1;// no stream type
1821        public boolean mIsTransportControlReceiver = false;
1822        public IAudioFocusDispatcher mFocusDispatcher = null;
1823        public IBinder mSourceRef = null;
1824        public String mClientId;
1825        public int mFocusChangeType;
1826
1827        public FocusStackEntry() {
1828        }
1829
1830        public FocusStackEntry(int streamType, int duration, boolean isTransportControlReceiver,
1831                IAudioFocusDispatcher afl, IBinder source, String id) {
1832            mStreamType = streamType;
1833            mIsTransportControlReceiver = isTransportControlReceiver;
1834            mFocusDispatcher = afl;
1835            mSourceRef = source;
1836            mClientId = id;
1837            mFocusChangeType = duration;
1838        }
1839    }
1840
1841    private Stack<FocusStackEntry> mFocusStack = new Stack<FocusStackEntry>();
1842
1843    /**
1844     * Helper function:
1845     * Display in the log the current entries in the audio focus stack
1846     */
1847    private void dumpFocusStack(PrintWriter pw) {
1848        pw.println("Audio Focus stack entries:");
1849        synchronized(mFocusStack) {
1850            Iterator<FocusStackEntry> stackIterator = mFocusStack.iterator();
1851            while(stackIterator.hasNext()) {
1852                FocusStackEntry fse = stackIterator.next();
1853                pw.println("     source:" + fse.mSourceRef + " -- client: " + fse.mClientId
1854                        + " -- duration: " +fse.mFocusChangeType);
1855            }
1856        }
1857    }
1858
1859    /**
1860     * Helper function:
1861     * Remove a focus listener from the focus stack.
1862     * @param focusListenerToRemove the focus listener
1863     * @param signal if true and the listener was at the top of the focus stack, i.e. it was holding
1864     *   focus, notify the next item in the stack it gained focus.
1865     */
1866    private void removeFocusStackEntry(String clientToRemove, boolean signal) {
1867        // is the current top of the focus stack abandoning focus? (because of death or request)
1868        if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientToRemove))
1869        {
1870            //Log.i(TAG, "   removeFocusStackEntry() removing top of stack");
1871            mFocusStack.pop();
1872            if (signal) {
1873                // notify the new top of the stack it gained focus
1874                if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)
1875                        && canReassignAudioFocus()) {
1876                    try {
1877                        mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(
1878                                AudioManager.AUDIOFOCUS_GAIN, mFocusStack.peek().mClientId);
1879                    } catch (RemoteException e) {
1880                        Log.e(TAG, " Failure to signal gain of focus due to "+ e);
1881                        e.printStackTrace();
1882                    }
1883                }
1884            }
1885        } else {
1886            // focus is abandoned by a client that's not at the top of the stack,
1887            // no need to update focus.
1888            Iterator<FocusStackEntry> stackIterator = mFocusStack.iterator();
1889            while(stackIterator.hasNext()) {
1890                FocusStackEntry fse = (FocusStackEntry)stackIterator.next();
1891                if(fse.mClientId.equals(clientToRemove)) {
1892                    Log.i(TAG, " AudioFocus  abandonAudioFocus(): removing entry for "
1893                            + fse.mClientId);
1894                    mFocusStack.remove(fse);
1895                }
1896            }
1897        }
1898    }
1899
1900    /**
1901     * Helper function:
1902     * Remove focus listeners from the focus stack for a particular client.
1903     */
1904    private void removeFocusStackEntryForClient(IBinder cb) {
1905        // focus is abandoned by a client that's not at the top of the stack,
1906        // no need to update focus.
1907        Iterator<FocusStackEntry> stackIterator = mFocusStack.iterator();
1908        while(stackIterator.hasNext()) {
1909            FocusStackEntry fse = (FocusStackEntry)stackIterator.next();
1910            if(fse.mSourceRef.equals(cb)) {
1911                Log.i(TAG, " AudioFocus  abandonAudioFocus(): removing entry for "
1912                        + fse.mClientId);
1913                mFocusStack.remove(fse);
1914            }
1915        }
1916    }
1917
1918    /**
1919     * Helper function:
1920     * Returns true if the system is in a state where the focus can be reevaluated, false otherwise.
1921     */
1922    private boolean canReassignAudioFocus() {
1923        // focus requests are rejected during a phone call
1924        if (getMode() == AudioSystem.MODE_IN_CALL) {
1925            Log.i(TAG, " AudioFocus  can't be reassigned during a call, exiting");
1926            return false;
1927        }
1928        return true;
1929    }
1930
1931    /**
1932     * Inner class to monitor audio focus client deaths, and remove them from the audio focus
1933     * stack if necessary.
1934     */
1935    private class AudioFocusDeathHandler implements IBinder.DeathRecipient {
1936        private IBinder mCb; // To be notified of client's death
1937
1938        AudioFocusDeathHandler(IBinder cb) {
1939            mCb = cb;
1940        }
1941
1942        public void binderDied() {
1943            synchronized(mFocusStack) {
1944                Log.w(TAG, "  AudioFocus   audio focus client died");
1945                removeFocusStackEntryForClient(mCb);
1946            }
1947        }
1948
1949        public IBinder getBinder() {
1950            return mCb;
1951        }
1952    }
1953
1954
1955    /** @see AudioManager#requestAudioFocus(IAudioFocusDispatcher, int, int) */
1956    public int requestAudioFocus(int mainStreamType, int focusChangeHint, IBinder cb,
1957            IAudioFocusDispatcher fd, String clientId) {
1958        Log.i(TAG, " AudioFocus  requestAudioFocus() from " + clientId);
1959        // the main stream type for the audio focus request is currently not used. It may
1960        // potentially be used to handle multiple stream type-dependent audio focuses.
1961
1962        if ((cb == null) || !cb.pingBinder()) {
1963            Log.i(TAG, " AudioFocus  DOA client for requestAudioFocus(), exiting");
1964            return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
1965        }
1966
1967        if (!canReassignAudioFocus()) {
1968            return AudioManager.AUDIOFOCUS_REQUEST_FAILED;
1969        }
1970
1971        synchronized(mFocusStack) {
1972            if (!mFocusStack.empty() && mFocusStack.peek().mClientId.equals(clientId)) {
1973                mFocusStack.peek().mFocusChangeType = focusChangeHint;
1974                // if focus is already owned by this client, don't do anything
1975                return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
1976            }
1977
1978            // notify current top of stack it is losing focus
1979            if (!mFocusStack.empty() && (mFocusStack.peek().mFocusDispatcher != null)) {
1980                try {
1981                    mFocusStack.peek().mFocusDispatcher.dispatchAudioFocusChange(
1982                            -1 * focusChangeHint, // loss and gain codes are inverse of each other
1983                            mFocusStack.peek().mClientId);
1984                } catch (RemoteException e) {
1985                    Log.e(TAG, " Failure to signal loss of focus due to "+ e);
1986                    e.printStackTrace();
1987                }
1988            }
1989
1990            // push focus requester at the top of the audio focus stack
1991            mFocusStack.push(new FocusStackEntry(mainStreamType, focusChangeHint, false, fd, cb,
1992                    clientId));
1993        }//synchronized(mFocusStack)
1994
1995        // handle the potential premature death of the new holder of the focus
1996        // (premature death == death before abandoning focus)
1997        // Register for client death notification
1998        AudioFocusDeathHandler afdh = new AudioFocusDeathHandler(cb);
1999        try {
2000            cb.linkToDeath(afdh, 0);
2001        } catch (RemoteException e) {
2002            // client has already died!
2003            Log.w(TAG, " AudioFocus  requestAudioFocus() could not link to "+cb+" binder death");
2004        }
2005
2006        return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
2007    }
2008
2009    /** @see AudioManager#abandonAudioFocus(IAudioFocusDispatcher) */
2010    public int abandonAudioFocus(IAudioFocusDispatcher fl, String clientId) {
2011        Log.i(TAG, " AudioFocus  abandonAudioFocus() from " + clientId);
2012
2013        // this will take care of notifying the new focus owner if needed
2014        removeFocusStackEntry(clientId, true);
2015
2016        return AudioManager.AUDIOFOCUS_REQUEST_GRANTED;
2017    }
2018
2019
2020    public void unregisterAudioFocusClient(String clientId) {
2021        removeFocusStackEntry(clientId, false);
2022    }
2023
2024
2025    //==========================================================================================
2026    // RemoteControl
2027    //==========================================================================================
2028    /**
2029     * Receiver for media button intents. Handles the dispatching of the media button event
2030     * to one of the registered listeners, or if there was none, resumes the intent broadcast
2031     * to the rest of the system.
2032     */
2033    private class MediaButtonBroadcastReceiver extends BroadcastReceiver {
2034        @Override
2035        public void onReceive(Context context, Intent intent) {
2036            String action = intent.getAction();
2037            if (!Intent.ACTION_MEDIA_BUTTON.equals(action)) {
2038                return;
2039            }
2040            KeyEvent event = (KeyEvent) intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);
2041            if (event != null) {
2042                // if in a call or ringing, do not break the current phone app behavior
2043                // TODO modify this to let the phone app specifically get the RC focus
2044                //      add modify the phone app to take advantage of the new API
2045                if ((getMode() == AudioSystem.MODE_IN_CALL) ||
2046                        (getMode() == AudioSystem.MODE_RINGTONE)) {
2047                    return;
2048                }
2049                synchronized(mRCStack) {
2050                    if (!mRCStack.empty()) {
2051                        // create a new intent specifically aimed at the current registered listener
2052                        Intent targetedIntent = new Intent(Intent.ACTION_MEDIA_BUTTON);
2053                        targetedIntent.putExtras(intent.getExtras());
2054                        targetedIntent.setComponent(mRCStack.peek().mReceiverComponent);
2055                        // trap the current broadcast
2056                        abortBroadcast();
2057                        //Log.v(TAG, " Sending intent" + targetedIntent);
2058                        context.sendBroadcast(targetedIntent, null);
2059                    }
2060                }
2061            }
2062        }
2063    }
2064
2065    private static class RemoteControlStackEntry {
2066        public ComponentName mReceiverComponent;// always non null
2067        // TODO implement registration expiration?
2068        //public int mRegistrationTime;
2069
2070        public RemoteControlStackEntry() {
2071        }
2072
2073        public RemoteControlStackEntry(ComponentName r) {
2074            mReceiverComponent = r;
2075        }
2076    }
2077
2078    private Stack<RemoteControlStackEntry> mRCStack = new Stack<RemoteControlStackEntry>();
2079
2080    /**
2081     * Helper function:
2082     * Display in the log the current entries in the remote control focus stack
2083     */
2084    private void dumpRCStack(PrintWriter pw) {
2085        pw.println("Remote Control stack entries:");
2086        synchronized(mRCStack) {
2087            Iterator<RemoteControlStackEntry> stackIterator = mRCStack.iterator();
2088            while(stackIterator.hasNext()) {
2089                RemoteControlStackEntry fse = stackIterator.next();
2090                pw.println("     receiver:" + fse.mReceiverComponent);
2091            }
2092        }
2093    }
2094
2095    /**
2096     * Helper function:
2097     * Set the new remote control receiver at the top of the RC focus stack
2098     */
2099    private void pushMediaButtonReceiver(ComponentName newReceiver) {
2100        // already at top of stack?
2101        if (!mRCStack.empty() && mRCStack.peek().mReceiverComponent.equals(newReceiver)) {
2102            return;
2103        }
2104        Iterator<RemoteControlStackEntry> stackIterator = mRCStack.iterator();
2105        while(stackIterator.hasNext()) {
2106            RemoteControlStackEntry rcse = (RemoteControlStackEntry)stackIterator.next();
2107            if(rcse.mReceiverComponent.equals(newReceiver)) {
2108                mRCStack.remove(rcse);
2109                break;
2110            }
2111        }
2112        mRCStack.push(new RemoteControlStackEntry(newReceiver));
2113    }
2114
2115    /**
2116     * Helper function:
2117     * Remove the remote control receiver from the RC focus stack
2118     */
2119    private void removeMediaButtonReceiver(ComponentName newReceiver) {
2120        Iterator<RemoteControlStackEntry> stackIterator = mRCStack.iterator();
2121        while(stackIterator.hasNext()) {
2122            RemoteControlStackEntry rcse = (RemoteControlStackEntry)stackIterator.next();
2123            if(rcse.mReceiverComponent.equals(newReceiver)) {
2124                mRCStack.remove(rcse);
2125                break;
2126            }
2127        }
2128    }
2129
2130
2131    /** see AudioManager.registerMediaButtonEventReceiver(ComponentName eventReceiver) */
2132    public void registerMediaButtonEventReceiver(ComponentName eventReceiver) {
2133        Log.i(TAG, "  Remote Control   registerMediaButtonEventReceiver() for " + eventReceiver);
2134
2135        synchronized(mRCStack) {
2136            pushMediaButtonReceiver(eventReceiver);
2137        }
2138    }
2139
2140    /** see AudioManager.unregisterMediaButtonEventReceiver(ComponentName eventReceiver) */
2141    public void unregisterMediaButtonEventReceiver(ComponentName eventReceiver) {
2142        Log.i(TAG, "  Remote Control   registerMediaButtonEventReceiver() for " + eventReceiver);
2143
2144        synchronized(mRCStack) {
2145            removeMediaButtonReceiver(eventReceiver);
2146        }
2147    }
2148
2149
2150    @Override
2151    protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
2152        // TODO probably a lot more to do here than just the audio focus and remote control stacks
2153        dumpFocusStack(pw);
2154        dumpRCStack(pw);
2155    }
2156
2157
2158}
2159