xref: /frameworks/base/services/core/java/com/android/server/audio/AudioService.java

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.server.audio;

import static android.Manifest.permission.REMOTE_AUDIO_PLAYBACK;
import static android.media.AudioManager.RINGER_MODE_NORMAL;
import static android.media.AudioManager.RINGER_MODE_SILENT;
import static android.media.AudioManager.RINGER_MODE_VIBRATE;
import static android.os.Process.FIRST_APPLICATION_UID;

import android.Manifest;
import android.app.ActivityManager;
import android.app.ActivityManagerInternal;
import android.app.ActivityManagerNative;
import android.app.AppGlobals;
import android.app.AppOpsManager;
import android.app.NotificationManager;
import android.bluetooth.BluetoothA2dp;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothClass;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothHeadset;
import android.bluetooth.BluetoothProfile;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.UserInfo;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.database.ContentObserver;
import android.hardware.hdmi.HdmiControlManager;
import android.hardware.hdmi.HdmiPlaybackClient;
import android.hardware.hdmi.HdmiTvClient;
import android.hardware.usb.UsbManager;
import android.media.AudioAttributes;
import android.media.AudioDevicePort;
import android.media.AudioSystem;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioManagerInternal;
import android.media.AudioPort;
import android.media.AudioRecordingConfiguration;
import android.media.AudioRoutesInfo;
import android.media.IAudioFocusDispatcher;
import android.media.IAudioRoutesObserver;
import android.media.IAudioService;
import android.media.IRecordingConfigDispatcher;
import android.media.IRingtonePlayer;
import android.media.IVolumeController;
import android.media.MediaPlayer;
import android.media.SoundPool;
import android.media.VolumePolicy;
import android.media.MediaPlayer.OnCompletionListener;
import android.media.MediaPlayer.OnErrorListener;
import android.media.audiopolicy.AudioMix;
import android.media.audiopolicy.AudioPolicy;
import android.media.audiopolicy.AudioPolicyConfig;
import android.media.audiopolicy.IAudioPolicyCallback;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.IBinder;
import android.os.Looper;
import android.os.Message;
import android.os.PowerManager;
import android.os.RemoteCallbackList;
import android.os.RemoteException;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.os.UserHandle;
import android.os.UserManager;
import android.os.UserManagerInternal;
import android.os.UserManagerInternal.UserRestrictionsListener;
import android.os.Vibrator;
import android.provider.Settings;
import android.provider.Settings.System;
import android.telecom.TelecomManager;
import android.text.TextUtils;
import android.util.AndroidRuntimeException;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.Log;
import android.util.MathUtils;
import android.util.Slog;
import android.util.SparseIntArray;
import android.view.KeyEvent;
import android.view.accessibility.AccessibilityManager;

import com.android.internal.util.XmlUtils;
import com.android.server.EventLogTags;
import com.android.server.LocalServices;
import com.android.server.SystemService;
import com.android.server.pm.UserManagerService;

import org.xmlpull.v1.XmlPullParserException;

import java.io.FileDescriptor;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.Objects;

/**
 * The implementation of the volume manager service.
 * <p>
 * This implementation focuses on delivering a responsive UI. Most methods are
 * asynchronous to external calls. For example, the task of setting a volume
 * will update our internal state, but in a separate thread will set the system
 * volume and later persist to the database. Similarly, setting the ringer mode
 * will update the state and broadcast a change and in a separate thread later
 * persist the ringer mode.
 *
 * @hide
 */
public class AudioService extends IAudioService.Stub {

    private static final String TAG = "AudioService";

    /** Debug audio mode */
    protected static final boolean DEBUG_MODE = Log.isLoggable(TAG + ".MOD", Log.DEBUG);

    /** Debug audio policy feature */
    protected static final boolean DEBUG_AP = Log.isLoggable(TAG + ".AP", Log.DEBUG);

    /** Debug volumes */
    protected static final boolean DEBUG_VOL = Log.isLoggable(TAG + ".VOL", Log.DEBUG);

    /** debug calls to devices APIs */
    protected static final boolean DEBUG_DEVICES = Log.isLoggable(TAG + ".DEVICES", Log.DEBUG);

    /** How long to delay before persisting a change in volume/ringer mode. */
    private static final int PERSIST_DELAY = 500;

    /** How long to delay after a volume down event before unmuting a stream */
    private static final int UNMUTE_STREAM_DELAY = 350;

    /**
     * Only used in the result from {@link #checkForRingerModeChange(int, int, int)}
     */
    private static final int FLAG_ADJUST_VOLUME = 1;

    private final Context mContext;
    private final ContentResolver mContentResolver;
    private final AppOpsManager mAppOps;

    // the platform type affects volume and silent mode behavior
    private final int mPlatformType;

    private boolean isPlatformVoice() {
        return mPlatformType == AudioSystem.PLATFORM_VOICE;
    }

    private boolean isPlatformTelevision() {
        return mPlatformType == AudioSystem.PLATFORM_TELEVISION;
    }

    /** The controller for the volume UI. */
    private final VolumeController mVolumeController = new VolumeController();
    private final ControllerService mControllerService = new ControllerService();

    // sendMsg() flags
    /** If the msg is already queued, replace it with this one. */
    private static final int SENDMSG_REPLACE = 0;
    /** If the msg is already queued, ignore this one and leave the old. */
    private static final int SENDMSG_NOOP = 1;
    /** If the msg is already queued, queue this one and leave the old. */
    private static final int SENDMSG_QUEUE = 2;

    // AudioHandler messages
    private static final int MSG_SET_DEVICE_VOLUME = 0;
    private static final int MSG_PERSIST_VOLUME = 1;
    private static final int MSG_PERSIST_RINGER_MODE = 3;
    private static final int MSG_AUDIO_SERVER_DIED = 4;
    private static final int MSG_PLAY_SOUND_EFFECT = 5;
    private static final int MSG_BTA2DP_DOCK_TIMEOUT = 6;
    private static final int MSG_LOAD_SOUND_EFFECTS = 7;
    private static final int MSG_SET_FORCE_USE = 8;
    private static final int MSG_BT_HEADSET_CNCT_FAILED = 9;
    private static final int MSG_SET_ALL_VOLUMES = 10;
    private static final int MSG_REPORT_NEW_ROUTES = 12;
    private static final int MSG_SET_FORCE_BT_A2DP_USE = 13;
    private static final int MSG_CHECK_MUSIC_ACTIVE = 14;
    private static final int MSG_BROADCAST_AUDIO_BECOMING_NOISY = 15;
    private static final int MSG_CONFIGURE_SAFE_MEDIA_VOLUME = 16;
    private static final int MSG_CONFIGURE_SAFE_MEDIA_VOLUME_FORCED = 17;
    private static final int MSG_PERSIST_SAFE_VOLUME_STATE = 18;
    private static final int MSG_BROADCAST_BT_CONNECTION_STATE = 19;
    private static final int MSG_UNLOAD_SOUND_EFFECTS = 20;
    private static final int MSG_SYSTEM_READY = 21;
    private static final int MSG_PERSIST_MUSIC_ACTIVE_MS = 22;
    private static final int MSG_UNMUTE_STREAM = 24;
    private static final int MSG_DYN_POLICY_MIX_STATE_UPDATE = 25;
    private static final int MSG_INDICATE_SYSTEM_READY = 26;
    // start of messages handled under wakelock
    //   these messages can only be queued, i.e. sent with queueMsgUnderWakeLock(),
    //   and not with sendMsg(..., ..., SENDMSG_QUEUE, ...)
    private static final int MSG_SET_WIRED_DEVICE_CONNECTION_STATE = 100;
    private static final int MSG_SET_A2DP_SRC_CONNECTION_STATE = 101;
    private static final int MSG_SET_A2DP_SINK_CONNECTION_STATE = 102;
    // end of messages handled under wakelock

    private static final int BTA2DP_DOCK_TIMEOUT_MILLIS = 8000;
    // Timeout for connection to bluetooth headset service
    private static final int BT_HEADSET_CNCT_TIMEOUT_MS = 3000;

    // retry delay in case of failure to indicate system ready to AudioFlinger
    private static final int INDICATE_SYSTEM_READY_RETRY_DELAY_MS = 1000;

    /** @see AudioSystemThread */
    private AudioSystemThread mAudioSystemThread;
    /** @see AudioHandler */
    private AudioHandler mAudioHandler;
    /** @see VolumeStreamState */
    private VolumeStreamState[] mStreamStates;
    private SettingsObserver mSettingsObserver;

    private int mMode = AudioSystem.MODE_NORMAL;
    // protects mRingerMode
    private final Object mSettingsLock = new Object();

    private SoundPool mSoundPool;
    private final Object mSoundEffectsLock = new Object();
    private static final int NUM_SOUNDPOOL_CHANNELS = 4;

    /* Sound effect file names  */
    private static final String SOUND_EFFECTS_PATH = "/media/audio/ui/";
    private static final List<String> SOUND_EFFECT_FILES = new ArrayList<String>();

    /* Sound effect file name mapping sound effect id (AudioManager.FX_xxx) to
     * file index in SOUND_EFFECT_FILES[] (first column) and indicating if effect
     * uses soundpool (second column) */
    private final int[][] SOUND_EFFECT_FILES_MAP = new int[AudioManager.NUM_SOUND_EFFECTS][2];

   /** Maximum volume index values for audio streams */
    private static int[] MAX_STREAM_VOLUME = new int[] {
        5,  // STREAM_VOICE_CALL
        7,  // STREAM_SYSTEM
        7,  // STREAM_RING
        15, // STREAM_MUSIC
        7,  // STREAM_ALARM
        7,  // STREAM_NOTIFICATION
        15, // STREAM_BLUETOOTH_SCO
        7,  // STREAM_SYSTEM_ENFORCED
        15, // STREAM_DTMF
        15  // STREAM_TTS
    };

    /** Minimum volume index values for audio streams */
    private static int[] MIN_STREAM_VOLUME = new int[] {
        1,  // STREAM_VOICE_CALL
        0,  // STREAM_SYSTEM
        0,  // STREAM_RING
        0,  // STREAM_MUSIC
        0,  // STREAM_ALARM
        0,  // STREAM_NOTIFICATION
        0,  // STREAM_BLUETOOTH_SCO
        0,  // STREAM_SYSTEM_ENFORCED
        0,  // STREAM_DTMF
        0   // STREAM_TTS
    };

    /* mStreamVolumeAlias[] indicates for each stream if it uses the volume settings
     * of another stream: This avoids multiplying the volume settings for hidden
     * stream types that follow other stream behavior for volume settings
     * NOTE: do not create loops in aliases!
     * Some streams alias to different streams according to device category (phone or tablet) or
     * use case (in call vs off call...). See updateStreamVolumeAlias() for more details.
     *  mStreamVolumeAlias contains STREAM_VOLUME_ALIAS_VOICE aliases for a voice capable device
     *  (phone), STREAM_VOLUME_ALIAS_TELEVISION for a television or set-top box and
     *  STREAM_VOLUME_ALIAS_DEFAULT for other devices (e.g. tablets).*/
    private final int[] STREAM_VOLUME_ALIAS_VOICE = new int[] {
        AudioSystem.STREAM_VOICE_CALL,      // STREAM_VOICE_CALL
        AudioSystem.STREAM_RING,            // STREAM_SYSTEM
        AudioSystem.STREAM_RING,            // STREAM_RING
        AudioSystem.STREAM_MUSIC,           // STREAM_MUSIC
        AudioSystem.STREAM_ALARM,           // STREAM_ALARM
        AudioSystem.STREAM_RING,            // STREAM_NOTIFICATION
        AudioSystem.STREAM_BLUETOOTH_SCO,   // STREAM_BLUETOOTH_SCO
        AudioSystem.STREAM_RING,            // STREAM_SYSTEM_ENFORCED
        AudioSystem.STREAM_RING,            // STREAM_DTMF
        AudioSystem.STREAM_MUSIC            // STREAM_TTS
    };
    private final int[] STREAM_VOLUME_ALIAS_TELEVISION = new int[] {
        AudioSystem.STREAM_MUSIC,       // STREAM_VOICE_CALL
        AudioSystem.STREAM_MUSIC,       // STREAM_SYSTEM
        AudioSystem.STREAM_MUSIC,       // STREAM_RING
        AudioSystem.STREAM_MUSIC,       // STREAM_MUSIC
        AudioSystem.STREAM_MUSIC,       // STREAM_ALARM
        AudioSystem.STREAM_MUSIC,       // STREAM_NOTIFICATION
        AudioSystem.STREAM_MUSIC,       // STREAM_BLUETOOTH_SCO
        AudioSystem.STREAM_MUSIC,       // STREAM_SYSTEM_ENFORCED
        AudioSystem.STREAM_MUSIC,       // STREAM_DTMF
        AudioSystem.STREAM_MUSIC        // STREAM_TTS
    };
    private final int[] STREAM_VOLUME_ALIAS_DEFAULT = new int[] {
        AudioSystem.STREAM_VOICE_CALL,      // STREAM_VOICE_CALL
        AudioSystem.STREAM_RING,            // STREAM_SYSTEM
        AudioSystem.STREAM_RING,            // STREAM_RING
        AudioSystem.STREAM_MUSIC,           // STREAM_MUSIC
        AudioSystem.STREAM_ALARM,           // STREAM_ALARM
        AudioSystem.STREAM_RING,            // STREAM_NOTIFICATION
        AudioSystem.STREAM_BLUETOOTH_SCO,   // STREAM_BLUETOOTH_SCO
        AudioSystem.STREAM_RING,            // STREAM_SYSTEM_ENFORCED
        AudioSystem.STREAM_RING,            // STREAM_DTMF
        AudioSystem.STREAM_MUSIC            // STREAM_TTS
    };
    private int[] mStreamVolumeAlias;

    /**
     * Map AudioSystem.STREAM_* constants to app ops.  This should be used
     * after mapping through mStreamVolumeAlias.
     */
    private static final int[] STREAM_VOLUME_OPS = new int[] {
        AppOpsManager.OP_AUDIO_VOICE_VOLUME,            // STREAM_VOICE_CALL
        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_SYSTEM
        AppOpsManager.OP_AUDIO_RING_VOLUME,             // STREAM_RING
        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_MUSIC
        AppOpsManager.OP_AUDIO_ALARM_VOLUME,            // STREAM_ALARM
        AppOpsManager.OP_AUDIO_NOTIFICATION_VOLUME,     // STREAM_NOTIFICATION
        AppOpsManager.OP_AUDIO_BLUETOOTH_VOLUME,        // STREAM_BLUETOOTH_SCO
        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_SYSTEM_ENFORCED
        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_DTMF
        AppOpsManager.OP_AUDIO_MEDIA_VOLUME,            // STREAM_TTS
    };

    private final boolean mUseFixedVolume;

    private final AudioSystem.ErrorCallback mAudioSystemCallback = new AudioSystem.ErrorCallback() {
        public void onError(int error) {
            switch (error) {
            case AudioSystem.AUDIO_STATUS_SERVER_DIED:
                sendMsg(mAudioHandler, MSG_AUDIO_SERVER_DIED,
                        SENDMSG_NOOP, 0, 0, null, 0);
                break;
            default:
                break;
            }
        }
    };

    /**
     * Current ringer mode from one of {@link AudioManager#RINGER_MODE_NORMAL},
     * {@link AudioManager#RINGER_MODE_SILENT}, or
     * {@link AudioManager#RINGER_MODE_VIBRATE}.
     */
    // protected by mSettingsLock
    private int mRingerMode;  // internal ringer mode, affects muting of underlying streams
    private int mRingerModeExternal = -1;  // reported ringer mode to outside clients (AudioManager)

    /** @see System#MODE_RINGER_STREAMS_AFFECTED */
    private int mRingerModeAffectedStreams = 0;

    // Streams currently muted by ringer mode
    private int mRingerModeMutedStreams;

    /** Streams that can be muted. Do not resolve to aliases when checking.
     * @see System#MUTE_STREAMS_AFFECTED */
    private int mMuteAffectedStreams;

    /**
     * NOTE: setVibrateSetting(), getVibrateSetting(), shouldVibrate() are deprecated.
     * mVibrateSetting is just maintained during deprecation period but vibration policy is
     * now only controlled by mHasVibrator and mRingerMode
     */
    private int mVibrateSetting;

    // Is there a vibrator
    private final boolean mHasVibrator;

    // Broadcast receiver for device connections intent broadcasts
    private final BroadcastReceiver mReceiver = new AudioServiceBroadcastReceiver();

    /** Interface for UserManagerService. */
    private final UserManagerInternal mUserManagerInternal;

    private final UserRestrictionsListener mUserRestrictionsListener =
            new AudioServiceUserRestrictionsListener();

    // Devices currently connected
    // Use makeDeviceListKey() to make a unique key for this list.
    private class DeviceListSpec {
        int mDeviceType;
        String mDeviceName;
        String mDeviceAddress;

        public DeviceListSpec(int deviceType, String deviceName, String deviceAddress) {
            mDeviceType = deviceType;
            mDeviceName = deviceName;
            mDeviceAddress = deviceAddress;
        }

        public String toString() {
            return "[type:0x" + Integer.toHexString(mDeviceType) + " name:" + mDeviceName
                    + " address:" + mDeviceAddress + "]";
        }
    }

    // Generate a unique key for the mConnectedDevices List by composing the device "type"
    // and the "address" associated with a specific instance of that device type
    private String makeDeviceListKey(int device, String deviceAddress) {
        return "0x" + Integer.toHexString(device) + ":" + deviceAddress;
    }

    private final ArrayMap<String, DeviceListSpec> mConnectedDevices = new ArrayMap<>();

    // Forced device usage for communications
    private int mForcedUseForComm;

    // List of binder death handlers for setMode() client processes.
    // The last process to have called setMode() is at the top of the list.
    private final ArrayList <SetModeDeathHandler> mSetModeDeathHandlers = new ArrayList <SetModeDeathHandler>();

    // List of clients having issued a SCO start request
    private final ArrayList <ScoClient> mScoClients = new ArrayList <ScoClient>();

    // BluetoothHeadset API to control SCO connection
    private BluetoothHeadset mBluetoothHeadset;

    // Bluetooth headset device
    private BluetoothDevice mBluetoothHeadsetDevice;

    // Indicate if SCO audio connection is currently active and if the initiator is
    // audio service (internal) or bluetooth headset (external)
    private int mScoAudioState;
    // SCO audio state is not active
    private static final int SCO_STATE_INACTIVE = 0;
    // SCO audio activation request waiting for headset service to connect
    private static final int SCO_STATE_ACTIVATE_REQ = 1;
    // SCO audio state is active or starting due to a request from AudioManager API
    private static final int SCO_STATE_ACTIVE_INTERNAL = 3;
    // SCO audio deactivation request waiting for headset service to connect
    private static final int SCO_STATE_DEACTIVATE_REQ = 5;

    // SCO audio state is active due to an action in BT handsfree (either voice recognition or
    // in call audio)
    private static final int SCO_STATE_ACTIVE_EXTERNAL = 2;
    // Deactivation request for all SCO connections (initiated by audio mode change)
    // waiting for headset service to connect
    private static final int SCO_STATE_DEACTIVATE_EXT_REQ = 4;

    // Indicates the mode used for SCO audio connection. The mode is virtual call if the request
    // originated from an app targeting an API version before JB MR2 and raw audio after that.
    private int mScoAudioMode;
    // SCO audio mode is undefined
    private static final int SCO_MODE_UNDEFINED = -1;
    // SCO audio mode is virtual voice call (BluetoothHeadset.startScoUsingVirtualVoiceCall())
    private static final int SCO_MODE_VIRTUAL_CALL = 0;
    // SCO audio mode is raw audio (BluetoothHeadset.connectAudio())
    private static final int SCO_MODE_RAW = 1;
    // SCO audio mode is Voice Recognition (BluetoothHeadset.startVoiceRecognition())
    private static final int SCO_MODE_VR = 2;

    private static final int SCO_MODE_MAX = 2;

    // Current connection state indicated by bluetooth headset
    private int mScoConnectionState;

    // true if boot sequence has been completed
    private boolean mSystemReady;
    // true if Intent.ACTION_USER_SWITCHED has ever been received
    private boolean mUserSwitchedReceived;
    // listener for SoundPool sample load completion indication
    private SoundPoolCallback mSoundPoolCallBack;
    // thread for SoundPool listener
    private SoundPoolListenerThread mSoundPoolListenerThread;
    // message looper for SoundPool listener
    private Looper mSoundPoolLooper = null;
    // volume applied to sound played with playSoundEffect()
    private static int sSoundEffectVolumeDb;
    // previous volume adjustment direction received by checkForRingerModeChange()
    private int mPrevVolDirection = AudioManager.ADJUST_SAME;
    // mVolumeControlStream is set by VolumePanel to temporarily force the stream type which volume
    // is controlled by Vol keys.
    private int  mVolumeControlStream = -1;
    private final Object mForceControlStreamLock = new Object();
    // VolumePanel is currently the only client of forceVolumeControlStream() and runs in system
    // server process so in theory it is not necessary to monitor the client death.
    // However it is good to be ready for future evolutions.
    private ForceControlStreamClient mForceControlStreamClient = null;
    // Used to play ringtones outside system_server
    private volatile IRingtonePlayer mRingtonePlayer;

    private int mDeviceOrientation = Configuration.ORIENTATION_UNDEFINED;

    // Request to override default use of A2DP for media.
    private boolean mBluetoothA2dpEnabled;
    private final Object mBluetoothA2dpEnabledLock = new Object();

    // Monitoring of audio routes.  Protected by mCurAudioRoutes.
    final AudioRoutesInfo mCurAudioRoutes = new AudioRoutesInfo();
    final RemoteCallbackList<IAudioRoutesObserver> mRoutesObservers
            = new RemoteCallbackList<IAudioRoutesObserver>();

    // Devices for which the volume is fixed and VolumePanel slider should be disabled
    int mFixedVolumeDevices = AudioSystem.DEVICE_OUT_HDMI |
            AudioSystem.DEVICE_OUT_DGTL_DOCK_HEADSET |
            AudioSystem.DEVICE_OUT_ANLG_DOCK_HEADSET |
            AudioSystem.DEVICE_OUT_HDMI_ARC |
            AudioSystem.DEVICE_OUT_SPDIF |
            AudioSystem.DEVICE_OUT_AUX_LINE;
    int mFullVolumeDevices = 0;

    // TODO merge orientation and rotation
    private final boolean mMonitorOrientation;
    private final boolean mMonitorRotation;

    private boolean mDockAudioMediaEnabled = true;

    private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;

    // Used when safe volume warning message display is requested by setStreamVolume(). In this
    // case, the new requested volume, stream type and device are stored in mPendingVolumeCommand
    // and used later when/if disableSafeMediaVolume() is called.
    private StreamVolumeCommand mPendingVolumeCommand;

    private PowerManager.WakeLock mAudioEventWakeLock;

    private final MediaFocusControl mMediaFocusControl;

    // Reference to BluetoothA2dp to query for AbsoluteVolume.
    private BluetoothA2dp mA2dp;
    // lock always taken synchronized on mConnectedDevices
    private final Object mA2dpAvrcpLock = new Object();
    // If absolute volume is supported in AVRCP device
    private boolean mAvrcpAbsVolSupported = false;

    private static Long mLastDeviceConnectMsgTime = new Long(0);

    private NotificationManager mNm;
    private AudioManagerInternal.RingerModeDelegate mRingerModeDelegate;
    private VolumePolicy mVolumePolicy = VolumePolicy.DEFAULT;
    private long mLoweredFromNormalToVibrateTime;

    // Intent "extra" data keys.
    public static final String CONNECT_INTENT_KEY_PORT_NAME = "portName";
    public static final String CONNECT_INTENT_KEY_STATE = "state";
    public static final String CONNECT_INTENT_KEY_ADDRESS = "address";
    public static final String CONNECT_INTENT_KEY_HAS_PLAYBACK = "hasPlayback";
    public static final String CONNECT_INTENT_KEY_HAS_CAPTURE = "hasCapture";
    public static final String CONNECT_INTENT_KEY_HAS_MIDI = "hasMIDI";
    public static final String CONNECT_INTENT_KEY_DEVICE_CLASS = "class";

    // Defines the format for the connection "address" for ALSA devices
    public static String makeAlsaAddressString(int card, int device) {
        return "card=" + card + ";device=" + device + ";";
    }

    public static final class Lifecycle extends SystemService {
        private AudioService mService;

        public Lifecycle(Context context) {
            super(context);
            mService = new AudioService(context);
        }

        @Override
        public void onStart() {
            publishBinderService(Context.AUDIO_SERVICE, mService);
        }

        @Override
        public void onBootPhase(int phase) {
            if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY) {
                mService.systemReady();
            }
        }
    }

    ///////////////////////////////////////////////////////////////////////////
    // Construction
    ///////////////////////////////////////////////////////////////////////////

    /** @hide */
    public AudioService(Context context) {
        mContext = context;
        mContentResolver = context.getContentResolver();
        mAppOps = (AppOpsManager)context.getSystemService(Context.APP_OPS_SERVICE);

        mPlatformType = AudioSystem.getPlatformType(context);

        mUserManagerInternal = LocalServices.getService(UserManagerInternal.class);

        PowerManager pm = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
        mAudioEventWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "handleAudioEvent");

        Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
        mHasVibrator = vibrator == null ? false : vibrator.hasVibrator();

        // Initialize volume
        int maxVolume = SystemProperties.getInt("ro.config.vc_call_vol_steps",
                MAX_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL]);
        if (maxVolume != MAX_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL]) {
            MAX_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL] = maxVolume;
            AudioSystem.DEFAULT_STREAM_VOLUME[AudioSystem.STREAM_VOICE_CALL] = (maxVolume * 3) / 4;
        }
        maxVolume = SystemProperties.getInt("ro.config.media_vol_steps",
                MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC]);
        if (maxVolume != MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC]) {
            MAX_STREAM_VOLUME[AudioSystem.STREAM_MUSIC] = maxVolume;
            AudioSystem.DEFAULT_STREAM_VOLUME[AudioSystem.STREAM_MUSIC] = (maxVolume * 3) / 4;
        }

        sSoundEffectVolumeDb = context.getResources().getInteger(
                com.android.internal.R.integer.config_soundEffectVolumeDb);

        mForcedUseForComm = AudioSystem.FORCE_NONE;

        createAudioSystemThread();

        AudioSystem.setErrorCallback(mAudioSystemCallback);

        boolean cameraSoundForced = readCameraSoundForced();
        mCameraSoundForced = new Boolean(cameraSoundForced);
        sendMsg(mAudioHandler,
                MSG_SET_FORCE_USE,
                SENDMSG_QUEUE,
                AudioSystem.FOR_SYSTEM,
                cameraSoundForced ?
                        AudioSystem.FORCE_SYSTEM_ENFORCED : AudioSystem.FORCE_NONE,
                null,
                0);

        mSafeMediaVolumeState = new Integer(Settings.Global.getInt(mContentResolver,
                                                        Settings.Global.AUDIO_SAFE_VOLUME_STATE,
                                                        SAFE_MEDIA_VOLUME_NOT_CONFIGURED));
        // The default safe volume index read here will be replaced by the actual value when
        // the mcc is read by onConfigureSafeVolume()
        mSafeMediaVolumeIndex = mContext.getResources().getInteger(
                com.android.internal.R.integer.config_safe_media_volume_index) * 10;

        mUseFixedVolume = mContext.getResources().getBoolean(
                com.android.internal.R.bool.config_useFixedVolume);

        // must be called before readPersistedSettings() which needs a valid mStreamVolumeAlias[]
        // array initialized by updateStreamVolumeAlias()
        updateStreamVolumeAlias(false /*updateVolumes*/, TAG);
        readPersistedSettings();
        readUserRestrictions();
        mSettingsObserver = new SettingsObserver();
        createStreamStates();

        mMediaFocusControl = new MediaFocusControl(mContext);

        readAndSetLowRamDevice();

        // Call setRingerModeInt() to apply correct mute
        // state on streams affected by ringer mode.
        mRingerModeMutedStreams = 0;
        setRingerModeInt(getRingerModeInternal(), false);

        // Register for device connection intent broadcasts.
        IntentFilter intentFilter =
                new IntentFilter(BluetoothHeadset.ACTION_AUDIO_STATE_CHANGED);
        intentFilter.addAction(BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED);
        intentFilter.addAction(Intent.ACTION_DOCK_EVENT);
        intentFilter.addAction(Intent.ACTION_SCREEN_ON);
        intentFilter.addAction(Intent.ACTION_SCREEN_OFF);
        intentFilter.addAction(Intent.ACTION_USER_SWITCHED);
        intentFilter.addAction(Intent.ACTION_USER_BACKGROUND);
        intentFilter.addAction(Intent.ACTION_USER_FOREGROUND);
        intentFilter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
        intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);

        intentFilter.addAction(Intent.ACTION_CONFIGURATION_CHANGED);
        // TODO merge orientation and rotation
        mMonitorOrientation = SystemProperties.getBoolean("ro.audio.monitorOrientation", false);
        if (mMonitorOrientation) {
            Log.v(TAG, "monitoring device orientation");
            // initialize orientation in AudioSystem
            setOrientationForAudioSystem();
        }
        mMonitorRotation = SystemProperties.getBoolean("ro.audio.monitorRotation", false);
        if (mMonitorRotation) {
            RotationHelper.init(mContext, mAudioHandler);
        }

        context.registerReceiverAsUser(mReceiver, UserHandle.ALL, intentFilter, null, null);

        LocalServices.addService(AudioManagerInternal.class, new AudioServiceInternal());

        mUserManagerInternal.addUserRestrictionsListener(mUserRestrictionsListener);

        mRecordMonitor.initMonitor();
    }

    public void systemReady() {
        sendMsg(mAudioHandler, MSG_SYSTEM_READY, SENDMSG_QUEUE,
                0, 0, null, 0);
    }

    public void onSystemReady() {
        mSystemReady = true;
        sendMsg(mAudioHandler, MSG_LOAD_SOUND_EFFECTS, SENDMSG_QUEUE,
                0, 0, null, 0);

        mScoConnectionState = AudioManager.SCO_AUDIO_STATE_ERROR;
        resetBluetoothSco();
        getBluetoothHeadset();
        //FIXME: this is to maintain compatibility with deprecated intent
        // AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED. Remove when appropriate.
        Intent newIntent = new Intent(AudioManager.ACTION_SCO_AUDIO_STATE_CHANGED);
        newIntent.putExtra(AudioManager.EXTRA_SCO_AUDIO_STATE,
                AudioManager.SCO_AUDIO_STATE_DISCONNECTED);
        sendStickyBroadcastToAll(newIntent);

        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
        if (adapter != null) {
            adapter.getProfileProxy(mContext, mBluetoothProfileServiceListener,
                                    BluetoothProfile.A2DP);
        }

        mHdmiManager =
                (HdmiControlManager) mContext.getSystemService(Context.HDMI_CONTROL_SERVICE);
        if (mHdmiManager != null) {
            synchronized (mHdmiManager) {
                mHdmiTvClient = mHdmiManager.getTvClient();
                if (mHdmiTvClient != null) {
                    mFixedVolumeDevices &= ~AudioSystem.DEVICE_ALL_HDMI_SYSTEM_AUDIO_AND_SPEAKER;
                }
                mHdmiPlaybackClient = mHdmiManager.getPlaybackClient();
                mHdmiCecSink = false;
            }
        }

        mNm = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);

        sendMsg(mAudioHandler,
                MSG_CONFIGURE_SAFE_MEDIA_VOLUME_FORCED,
                SENDMSG_REPLACE,
                0,
                0,
                TAG,
                SAFE_VOLUME_CONFIGURE_TIMEOUT_MS);

        StreamOverride.init(mContext);
        mControllerService.init();
        onIndicateSystemReady();
    }

    void onIndicateSystemReady() {
        if (AudioSystem.systemReady() == AudioSystem.SUCCESS) {
            return;
        }
        sendMsg(mAudioHandler,
                MSG_INDICATE_SYSTEM_READY,
                SENDMSG_REPLACE,
                0,
                0,
                null,
                INDICATE_SYSTEM_READY_RETRY_DELAY_MS);
    }

    public void onAudioServerDied() {
        if (!mSystemReady ||
                (AudioSystem.checkAudioFlinger() != AudioSystem.AUDIO_STATUS_OK)) {
            Log.e(TAG, "Audioserver died.");
            sendMsg(mAudioHandler, MSG_AUDIO_SERVER_DIED, SENDMSG_NOOP, 0, 0,
                    null, 500);
            return;
        }
        Log.e(TAG, "Audioserver started.");

        // indicate to audio HAL that we start the reconfiguration phase after a media
        // server crash
        // Note that we only execute this when the media server
        // process restarts after a crash, not the first time it is started.
        AudioSystem.setParameters("restarting=true");

        readAndSetLowRamDevice();

        // Restore device connection states
        synchronized (mConnectedDevices) {
            for (int i = 0; i < mConnectedDevices.size(); i++) {
                DeviceListSpec spec = mConnectedDevices.valueAt(i);
                AudioSystem.setDeviceConnectionState(
                                                spec.mDeviceType,
                                                AudioSystem.DEVICE_STATE_AVAILABLE,
                                                spec.mDeviceAddress,
                                                spec.mDeviceName);
            }
        }
        // Restore call state
        AudioSystem.setPhoneState(mMode);

        // Restore forced usage for communcations and record
        AudioSystem.setForceUse(AudioSystem.FOR_COMMUNICATION, mForcedUseForComm);
        AudioSystem.setForceUse(AudioSystem.FOR_RECORD, mForcedUseForComm);
        AudioSystem.setForceUse(AudioSystem.FOR_SYSTEM, mCameraSoundForced ?
                        AudioSystem.FORCE_SYSTEM_ENFORCED : AudioSystem.FORCE_NONE);

        // Restore stream volumes
        int numStreamTypes = AudioSystem.getNumStreamTypes();
        for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
            VolumeStreamState streamState = mStreamStates[streamType];
            AudioSystem.initStreamVolume(
                streamType, streamState.mIndexMin / 10, streamState.mIndexMax / 10);

            streamState.applyAllVolumes();
        }

        // Restore mono mode
        updateMasterMono(mContentResolver);

        // Restore ringer mode
        setRingerModeInt(getRingerModeInternal(), false);

        // Reset device orientation (if monitored for this device)
        if (mMonitorOrientation) {
            setOrientationForAudioSystem();
        }
        if (mMonitorRotation) {
            RotationHelper.updateOrientation();
        }

        synchronized (mBluetoothA2dpEnabledLock) {
            AudioSystem.setForceUse(AudioSystem.FOR_MEDIA,
                    mBluetoothA2dpEnabled ?
                            AudioSystem.FORCE_NONE : AudioSystem.FORCE_NO_BT_A2DP);
        }

        synchronized (mSettingsLock) {
            AudioSystem.setForceUse(AudioSystem.FOR_DOCK,
                    mDockAudioMediaEnabled ?
                            AudioSystem.FORCE_ANALOG_DOCK : AudioSystem.FORCE_NONE);
            sendEncodedSurroundMode(mContentResolver);
        }
        if (mHdmiManager != null) {
            synchronized (mHdmiManager) {
                if (mHdmiTvClient != null) {
                    setHdmiSystemAudioSupported(mHdmiSystemAudioSupported);
                }
            }
        }

        synchronized (mAudioPolicies) {
            for (AudioPolicyProxy policy : mAudioPolicies.values()) {
                policy.connectMixes();
            }
        }

        onIndicateSystemReady();
        // indicate the end of reconfiguration phase to audio HAL
        AudioSystem.setParameters("restarting=false");
    }

    private void createAudioSystemThread() {
        mAudioSystemThread = new AudioSystemThread();
        mAudioSystemThread.start();
        waitForAudioHandlerCreation();
    }

    /** Waits for the volume handler to be created by the other thread. */
    private void waitForAudioHandlerCreation() {
        synchronized(this) {
            while (mAudioHandler == null) {
                try {
                    // Wait for mAudioHandler to be set by the other thread
                    wait();
                } catch (InterruptedException e) {
                    Log.e(TAG, "Interrupted while waiting on volume handler.");
                }
            }
        }
    }

    private void checkAllAliasStreamVolumes() {
        synchronized (VolumeStreamState.class) {
            int numStreamTypes = AudioSystem.getNumStreamTypes();
            for (int streamType = 0; streamType < numStreamTypes; streamType++) {
                if (streamType != mStreamVolumeAlias[streamType]) {
                    mStreamStates[streamType].
                                    setAllIndexes(mStreamStates[mStreamVolumeAlias[streamType]],
                                            TAG);
                }
                // apply stream volume
                if (!mStreamStates[streamType].mIsMuted) {
                    mStreamStates[streamType].applyAllVolumes();
                }
            }
        }
    }

    private void checkAllFixedVolumeDevices()
    {
        int numStreamTypes = AudioSystem.getNumStreamTypes();
        for (int streamType = 0; streamType < numStreamTypes; streamType++) {
            mStreamStates[streamType].checkFixedVolumeDevices();
        }
    }

    private void checkAllFixedVolumeDevices(int streamType) {
        mStreamStates[streamType].checkFixedVolumeDevices();
    }

    private void checkMuteAffectedStreams() {
        // any stream with a min level > 0 is not muteable by definition
        for (int i = 0; i < mStreamStates.length; i++) {
            final VolumeStreamState vss = mStreamStates[i];
            if (vss.mIndexMin > 0) {
                mMuteAffectedStreams &= ~(1 << vss.mStreamType);
            }
        }
    }

    private void createStreamStates() {
        int numStreamTypes = AudioSystem.getNumStreamTypes();
        VolumeStreamState[] streams = mStreamStates = new VolumeStreamState[numStreamTypes];

        for (int i = 0; i < numStreamTypes; i++) {
            streams[i] = new VolumeStreamState(System.VOLUME_SETTINGS[mStreamVolumeAlias[i]], i);
        }

        checkAllFixedVolumeDevices();
        checkAllAliasStreamVolumes();
        checkMuteAffectedStreams();
    }

    private void dumpStreamStates(PrintWriter pw) {
        pw.println("\nStream volumes (device: index)");
        int numStreamTypes = AudioSystem.getNumStreamTypes();
        for (int i = 0; i < numStreamTypes; i++) {
            pw.println("- " + AudioSystem.STREAM_NAMES[i] + ":");
            mStreamStates[i].dump(pw);
            pw.println("");
        }
        pw.print("\n- mute affected streams = 0x");
        pw.println(Integer.toHexString(mMuteAffectedStreams));
    }

    private void updateStreamVolumeAlias(boolean updateVolumes, String caller) {
        int dtmfStreamAlias;

        switch (mPlatformType) {
        case AudioSystem.PLATFORM_VOICE:
            mStreamVolumeAlias = STREAM_VOLUME_ALIAS_VOICE;
            dtmfStreamAlias = AudioSystem.STREAM_RING;
            break;
        case AudioSystem.PLATFORM_TELEVISION:
            mStreamVolumeAlias = STREAM_VOLUME_ALIAS_TELEVISION;
            dtmfStreamAlias = AudioSystem.STREAM_MUSIC;
            break;
        default:
            mStreamVolumeAlias = STREAM_VOLUME_ALIAS_DEFAULT;
            dtmfStreamAlias = AudioSystem.STREAM_MUSIC;
        }

        if (isPlatformTelevision()) {
            mRingerModeAffectedStreams = 0;
        } else {
            if (isInCommunication()) {
                dtmfStreamAlias = AudioSystem.STREAM_VOICE_CALL;
                mRingerModeAffectedStreams &= ~(1 << AudioSystem.STREAM_DTMF);
            } else {
                mRingerModeAffectedStreams |= (1 << AudioSystem.STREAM_DTMF);
            }
        }

        mStreamVolumeAlias[AudioSystem.STREAM_DTMF] = dtmfStreamAlias;
        if (updateVolumes) {
            mStreamStates[AudioSystem.STREAM_DTMF].setAllIndexes(mStreamStates[dtmfStreamAlias],
                    caller);
            // apply stream mute states according to new value of mRingerModeAffectedStreams
            setRingerModeInt(getRingerModeInternal(), false);
            sendMsg(mAudioHandler,
                    MSG_SET_ALL_VOLUMES,
                    SENDMSG_QUEUE,
                    0,
                    0,
                    mStreamStates[AudioSystem.STREAM_DTMF], 0);
        }
    }

    private void readDockAudioSettings(ContentResolver cr)
    {
        mDockAudioMediaEnabled = Settings.Global.getInt(
                                        cr, Settings.Global.DOCK_AUDIO_MEDIA_ENABLED, 0) == 1;

        sendMsg(mAudioHandler,
                MSG_SET_FORCE_USE,
                SENDMSG_QUEUE,
                AudioSystem.FOR_DOCK,
                mDockAudioMediaEnabled ?
                        AudioSystem.FORCE_ANALOG_DOCK : AudioSystem.FORCE_NONE,
                null,
                0);
    }


    private void updateMasterMono(ContentResolver cr)
    {
        final boolean masterMono = System.getIntForUser(
                cr, System.MASTER_MONO, 0 /* default */, UserHandle.USER_CURRENT) == 1;
        if (DEBUG_VOL) {
            Log.d(TAG, String.format("Master mono %b", masterMono));
        }
        AudioSystem.setMasterMono(masterMono);
    }

    private void sendEncodedSurroundMode(ContentResolver cr)
    {
        int encodedSurroundMode = Settings.Global.getInt(
                cr, Settings.Global.ENCODED_SURROUND_OUTPUT,
                Settings.Global.ENCODED_SURROUND_OUTPUT_AUTO);
        sendEncodedSurroundMode(encodedSurroundMode);
    }

    private void sendEncodedSurroundMode(int encodedSurroundMode)
    {
        // initialize to guaranteed bad value
        int forceSetting = AudioSystem.NUM_FORCE_CONFIG;
        switch (encodedSurroundMode) {
            case Settings.Global.ENCODED_SURROUND_OUTPUT_AUTO:
                forceSetting = AudioSystem.FORCE_NONE;
                break;
            case Settings.Global.ENCODED_SURROUND_OUTPUT_NEVER:
                forceSetting = AudioSystem.FORCE_ENCODED_SURROUND_NEVER;
                break;
            case Settings.Global.ENCODED_SURROUND_OUTPUT_ALWAYS:
                forceSetting = AudioSystem.FORCE_ENCODED_SURROUND_ALWAYS;
                break;
            default:
                Log.e(TAG, "updateSurroundSoundSettings: illegal value "
                        + encodedSurroundMode);
                break;
        }
        if (forceSetting != AudioSystem.NUM_FORCE_CONFIG) {
            sendMsg(mAudioHandler,
                    MSG_SET_FORCE_USE,
                    SENDMSG_QUEUE,
                    AudioSystem.FOR_ENCODED_SURROUND,
                    forceSetting,
                    null,
                    0);
        }
    }

    private void readPersistedSettings() {
        final ContentResolver cr = mContentResolver;

        int ringerModeFromSettings =
                Settings.Global.getInt(
                        cr, Settings.Global.MODE_RINGER, AudioManager.RINGER_MODE_NORMAL);
        int ringerMode = ringerModeFromSettings;
        // sanity check in case the settings are restored from a device with incompatible
        // ringer modes
        if (!isValidRingerMode(ringerMode)) {
            ringerMode = AudioManager.RINGER_MODE_NORMAL;
        }
        if ((ringerMode == AudioManager.RINGER_MODE_VIBRATE) && !mHasVibrator) {
            ringerMode = AudioManager.RINGER_MODE_SILENT;
        }
        if (ringerMode != ringerModeFromSettings) {
            Settings.Global.putInt(cr, Settings.Global.MODE_RINGER, ringerMode);
        }
        if (mUseFixedVolume || isPlatformTelevision()) {
            ringerMode = AudioManager.RINGER_MODE_NORMAL;
        }
        synchronized(mSettingsLock) {
            mRingerMode = ringerMode;
            if (mRingerModeExternal == -1) {
                mRingerModeExternal = mRingerMode;
            }

            // System.VIBRATE_ON is not used any more but defaults for mVibrateSetting
            // are still needed while setVibrateSetting() and getVibrateSetting() are being
            // deprecated.
            mVibrateSetting = AudioSystem.getValueForVibrateSetting(0,
                                            AudioManager.VIBRATE_TYPE_NOTIFICATION,
                                            mHasVibrator ? AudioManager.VIBRATE_SETTING_ONLY_SILENT
                                                            : AudioManager.VIBRATE_SETTING_OFF);
            mVibrateSetting = AudioSystem.getValueForVibrateSetting(mVibrateSetting,
                                            AudioManager.VIBRATE_TYPE_RINGER,
                                            mHasVibrator ? AudioManager.VIBRATE_SETTING_ONLY_SILENT
                                                            : AudioManager.VIBRATE_SETTING_OFF);

            updateRingerModeAffectedStreams();
            readDockAudioSettings(cr);
            sendEncodedSurroundMode(cr);
        }

        mMuteAffectedStreams = System.getIntForUser(cr,
                System.MUTE_STREAMS_AFFECTED, AudioSystem.DEFAULT_MUTE_STREAMS_AFFECTED,
                UserHandle.USER_CURRENT);

        updateMasterMono(cr);

        // Each stream will read its own persisted settings

        // Broadcast the sticky intents
        broadcastRingerMode(AudioManager.RINGER_MODE_CHANGED_ACTION, mRingerModeExternal);
        broadcastRingerMode(AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION, mRingerMode);

        // Broadcast vibrate settings
        broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_RINGER);
        broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_NOTIFICATION);

        // Load settings for the volume controller
        mVolumeController.loadSettings(cr);
    }

    private void readUserRestrictions() {
        final int currentUser = getCurrentUserId();

        // Check the current user restriction.
        boolean masterMute =
                mUserManagerInternal.getUserRestriction(currentUser,
                        UserManager.DISALLLOW_UNMUTE_DEVICE)
                        || mUserManagerInternal.getUserRestriction(currentUser,
                        UserManager.DISALLOW_ADJUST_VOLUME);
        if (mUseFixedVolume) {
            masterMute = false;
            AudioSystem.setMasterVolume(1.0f);
        }
        if (DEBUG_VOL) {
            Log.d(TAG, String.format("Master mute %s, user=%d", masterMute, currentUser));
        }
        setSystemAudioMute(masterMute);
        AudioSystem.setMasterMute(masterMute);
        broadcastMasterMuteStatus(masterMute);

        boolean microphoneMute = mUserManagerInternal.getUserRestriction(
                currentUser, UserManager.DISALLOW_UNMUTE_MICROPHONE);
        if (DEBUG_VOL) {
            Log.d(TAG, String.format("Mic mute %s, user=%d", microphoneMute, currentUser));
        }
        AudioSystem.muteMicrophone(microphoneMute);
    }

    private int rescaleIndex(int index, int srcStream, int dstStream) {
        return (index * mStreamStates[dstStream].getMaxIndex() + mStreamStates[srcStream].getMaxIndex() / 2) / mStreamStates[srcStream].getMaxIndex();
    }

    ///////////////////////////////////////////////////////////////////////////
    // IPC methods
    ///////////////////////////////////////////////////////////////////////////
    /** @see AudioManager#adjustVolume(int, int) */
    public void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags,
            String callingPackage, String caller) {
        adjustSuggestedStreamVolume(direction, suggestedStreamType, flags, callingPackage,
                caller, Binder.getCallingUid());
    }

    private void adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags,
            String callingPackage, String caller, int uid) {
        if (DEBUG_VOL) Log.d(TAG, "adjustSuggestedStreamVolume() stream=" + suggestedStreamType
                + ", flags=" + flags + ", caller=" + caller);
        int streamType;
        boolean isMute = isMuteAdjust(direction);
        if (mVolumeControlStream != -1) {
            streamType = mVolumeControlStream;
        } else {
            streamType = getActiveStreamType(suggestedStreamType);
        }
        ensureValidStreamType(streamType);
        final int resolvedStream = mStreamVolumeAlias[streamType];

        // Play sounds on STREAM_RING only.
        if ((flags & AudioManager.FLAG_PLAY_SOUND) != 0 &&
                resolvedStream != AudioSystem.STREAM_RING) {
            flags &= ~AudioManager.FLAG_PLAY_SOUND;
        }

        // For notifications/ring, show the ui before making any adjustments
        // Don't suppress mute/unmute requests
        if (mVolumeController.suppressAdjustment(resolvedStream, flags, isMute)) {
            direction = 0;
            flags &= ~AudioManager.FLAG_PLAY_SOUND;
            flags &= ~AudioManager.FLAG_VIBRATE;
            if (DEBUG_VOL) Log.d(TAG, "Volume controller suppressed adjustment");
        }

        adjustStreamVolume(streamType, direction, flags, callingPackage, caller, uid);
    }

    /** @see AudioManager#adjustStreamVolume(int, int, int) */
    public void adjustStreamVolume(int streamType, int direction, int flags,
            String callingPackage) {
        adjustStreamVolume(streamType, direction, flags, callingPackage, callingPackage,
                Binder.getCallingUid());
    }

    private void adjustStreamVolume(int streamType, int direction, int flags,
            String callingPackage, String caller, int uid) {
        if (mUseFixedVolume) {
            return;
        }
        if (DEBUG_VOL) Log.d(TAG, "adjustStreamVolume() stream=" + streamType + ", dir=" + direction
                + ", flags=" + flags + ", caller=" + caller);

        ensureValidDirection(direction);
        ensureValidStreamType(streamType);

        boolean isMuteAdjust = isMuteAdjust(direction);

        if (isMuteAdjust && !isStreamAffectedByMute(streamType)) {
            return;
        }

        // use stream type alias here so that streams with same alias have the same behavior,
        // including with regard to silent mode control (e.g the use of STREAM_RING below and in
        // checkForRingerModeChange() in place of STREAM_RING or STREAM_NOTIFICATION)
        int streamTypeAlias = mStreamVolumeAlias[streamType];

        VolumeStreamState streamState = mStreamStates[streamTypeAlias];

        final int device = getDeviceForStream(streamTypeAlias);

        int aliasIndex = streamState.getIndex(device);
        boolean adjustVolume = true;
        int step;

        // skip a2dp absolute volume control request when the device
        // is not an a2dp device
        if ((device & AudioSystem.DEVICE_OUT_ALL_A2DP) == 0 &&
            (flags & AudioManager.FLAG_BLUETOOTH_ABS_VOLUME) != 0) {
            return;
        }

        // If we are being called by the system (e.g. hardware keys) check for current user
        // so we handle user restrictions correctly.
        if (uid == android.os.Process.SYSTEM_UID) {
            uid = UserHandle.getUid(getCurrentUserId(), UserHandle.getAppId(uid));
        }
        if (mAppOps.noteOp(STREAM_VOLUME_OPS[streamTypeAlias], uid, callingPackage)
                != AppOpsManager.MODE_ALLOWED) {
            return;
        }

        // reset any pending volume command
        synchronized (mSafeMediaVolumeState) {
            mPendingVolumeCommand = null;
        }

        flags &= ~AudioManager.FLAG_FIXED_VOLUME;
        if ((streamTypeAlias == AudioSystem.STREAM_MUSIC) &&
               ((device & mFixedVolumeDevices) != 0)) {
            flags |= AudioManager.FLAG_FIXED_VOLUME;

            // Always toggle between max safe volume and 0 for fixed volume devices where safe
            // volume is enforced, and max and 0 for the others.
            // This is simulated by stepping by the full allowed volume range
            if (mSafeMediaVolumeState == SAFE_MEDIA_VOLUME_ACTIVE &&
                    (device & mSafeMediaVolumeDevices) != 0) {
                step = mSafeMediaVolumeIndex;
            } else {
                step = streamState.getMaxIndex();
            }
            if (aliasIndex != 0) {
                aliasIndex = step;
            }
        } else {
            // convert one UI step (+/-1) into a number of internal units on the stream alias
            step = rescaleIndex(10, streamType, streamTypeAlias);
        }

        // If either the client forces allowing ringer modes for this adjustment,
        // or the stream type is one that is affected by ringer modes
        if (((flags & AudioManager.FLAG_ALLOW_RINGER_MODES) != 0) ||
                (streamTypeAlias == getUiSoundsStreamType())) {
            int ringerMode = getRingerModeInternal();
            // do not vibrate if already in vibrate mode
            if (ringerMode == AudioManager.RINGER_MODE_VIBRATE) {
                flags &= ~AudioManager.FLAG_VIBRATE;
            }
            // Check if the ringer mode handles this adjustment. If it does we don't
            // need to adjust the volume further.
            final int result = checkForRingerModeChange(aliasIndex, direction, step,
                    streamState.mIsMuted, callingPackage, flags);
            adjustVolume = (result & FLAG_ADJUST_VOLUME) != 0;
            // If suppressing a volume adjustment in silent mode, display the UI hint
            if ((result & AudioManager.FLAG_SHOW_SILENT_HINT) != 0) {
                flags |= AudioManager.FLAG_SHOW_SILENT_HINT;
            }
            // If suppressing a volume down adjustment in vibrate mode, display the UI hint
            if ((result & AudioManager.FLAG_SHOW_VIBRATE_HINT) != 0) {
                flags |= AudioManager.FLAG_SHOW_VIBRATE_HINT;
            }
        }
        // If the ringermode is suppressing media, prevent changes
        if (!volumeAdjustmentAllowedByDnd(streamTypeAlias, flags)) {
            adjustVolume = false;
        }
        int oldIndex = mStreamStates[streamType].getIndex(device);

        if (adjustVolume && (direction != AudioManager.ADJUST_SAME)) {
            mAudioHandler.removeMessages(MSG_UNMUTE_STREAM);

            // Check if volume update should be send to AVRCP
            if (streamTypeAlias == AudioSystem.STREAM_MUSIC &&
                (device & AudioSystem.DEVICE_OUT_ALL_A2DP) != 0 &&
                (flags & AudioManager.FLAG_BLUETOOTH_ABS_VOLUME) == 0) {
                synchronized (mA2dpAvrcpLock) {
                    if (mA2dp != null && mAvrcpAbsVolSupported) {
                        mA2dp.adjustAvrcpAbsoluteVolume(direction);
                    }
                }
            }

            if (isMuteAdjust) {
                boolean state;
                if (direction == AudioManager.ADJUST_TOGGLE_MUTE) {
                    state = !streamState.mIsMuted;
                } else {
                    state = direction == AudioManager.ADJUST_MUTE;
                }
                if (streamTypeAlias == AudioSystem.STREAM_MUSIC) {
                    setSystemAudioMute(state);
                }
                for (int stream = 0; stream < mStreamStates.length; stream++) {
                    if (streamTypeAlias == mStreamVolumeAlias[stream]) {
                        if (!(readCameraSoundForced()
                                    && (mStreamStates[stream].getStreamType()
                                        == AudioSystem.STREAM_SYSTEM_ENFORCED))) {
                            mStreamStates[stream].mute(state);
                        }
                    }
                }
            } else if ((direction == AudioManager.ADJUST_RAISE) &&
                    !checkSafeMediaVolume(streamTypeAlias, aliasIndex + step, device)) {
                Log.e(TAG, "adjustStreamVolume() safe volume index = " + oldIndex);
                mVolumeController.postDisplaySafeVolumeWarning(flags);
            } else if (streamState.adjustIndex(direction * step, device, caller)
                    || streamState.mIsMuted) {
                // Post message to set system volume (it in turn will post a
                // message to persist).
                if (streamState.mIsMuted) {
                    // Unmute the stream if it was previously muted
                    if (direction == AudioManager.ADJUST_RAISE) {
                        // unmute immediately for volume up
                        streamState.mute(false);
                    } else if (direction == AudioManager.ADJUST_LOWER) {
                        if (mPlatformType == AudioSystem.PLATFORM_TELEVISION) {
                            sendMsg(mAudioHandler, MSG_UNMUTE_STREAM, SENDMSG_QUEUE,
                                    streamTypeAlias, flags, null, UNMUTE_STREAM_DELAY);
                        }
                    }
                }
                sendMsg(mAudioHandler,
                        MSG_SET_DEVICE_VOLUME,
                        SENDMSG_QUEUE,
                        device,
                        0,
                        streamState,
                        0);
            }

            // Check if volume update should be sent to Hdmi system audio.
            int newIndex = mStreamStates[streamType].getIndex(device);
            if (streamTypeAlias == AudioSystem.STREAM_MUSIC) {
                setSystemAudioVolume(oldIndex, newIndex, getStreamMaxVolume(streamType), flags);
            }
            if (mHdmiManager != null) {
                synchronized (mHdmiManager) {
                    // mHdmiCecSink true => mHdmiPlaybackClient != null
                    if (mHdmiCecSink &&
                            streamTypeAlias == AudioSystem.STREAM_MUSIC &&
                            oldIndex != newIndex) {
                        synchronized (mHdmiPlaybackClient) {
                            int keyCode = (direction == -1) ? KeyEvent.KEYCODE_VOLUME_DOWN :
                                    KeyEvent.KEYCODE_VOLUME_UP;
                            final long ident = Binder.clearCallingIdentity();
                            try {
                                mHdmiPlaybackClient.sendKeyEvent(keyCode, true);
                                mHdmiPlaybackClient.sendKeyEvent(keyCode, false);
                            } finally {
                                Binder.restoreCallingIdentity(ident);
                            }
                        }
                    }
                }
            }
        }
        int index = mStreamStates[streamType].getIndex(device);
        sendVolumeUpdate(streamType, oldIndex, index, flags);
    }

    // Called after a delay when volume down is pressed while muted
    private void onUnmuteStream(int stream, int flags) {
        VolumeStreamState streamState = mStreamStates[stream];
        streamState.mute(false);

        final int device = getDeviceForStream(stream);
        final int index = mStreamStates[stream].getIndex(device);
        sendVolumeUpdate(stream, index, index, flags);
    }

    private void setSystemAudioVolume(int oldVolume, int newVolume, int maxVolume, int flags) {
        if (mHdmiManager == null
                || mHdmiTvClient == null
                || oldVolume == newVolume
                || (flags & AudioManager.FLAG_HDMI_SYSTEM_AUDIO_VOLUME) != 0) return;

        // Sets the audio volume of AVR when we are in system audio mode. The new volume info
        // is tranformed to HDMI-CEC commands and passed through CEC bus.
        synchronized (mHdmiManager) {
            if (!mHdmiSystemAudioSupported) return;
            synchronized (mHdmiTvClient) {
                final long token = Binder.clearCallingIdentity();
                try {
                    mHdmiTvClient.setSystemAudioVolume(oldVolume, newVolume, maxVolume);
                } finally {
                    Binder.restoreCallingIdentity(token);
                }
            }
        }
    }

    // StreamVolumeCommand contains the information needed to defer the process of
    // setStreamVolume() in case the user has to acknowledge the safe volume warning message.
    class StreamVolumeCommand {
        public final int mStreamType;
        public final int mIndex;
        public final int mFlags;
        public final int mDevice;

        StreamVolumeCommand(int streamType, int index, int flags, int device) {
            mStreamType = streamType;
            mIndex = index;
            mFlags = flags;
            mDevice = device;
        }

        @Override
        public String toString() {
            return new StringBuilder().append("{streamType=").append(mStreamType).append(",index=")
                    .append(mIndex).append(",flags=").append(mFlags).append(",device=")
                    .append(mDevice).append('}').toString();
        }
    };

    private int getNewRingerMode(int stream, int index, int flags) {
        // setting volume on ui sounds stream type also controls silent mode
        if (((flags & AudioManager.FLAG_ALLOW_RINGER_MODES) != 0) ||
                (stream == getUiSoundsStreamType())) {
            int newRingerMode;
            if (index == 0) {
                newRingerMode = mHasVibrator ? AudioManager.RINGER_MODE_VIBRATE
                        : mVolumePolicy.volumeDownToEnterSilent ? AudioManager.RINGER_MODE_SILENT
                                : AudioManager.RINGER_MODE_NORMAL;
            } else {
                newRingerMode = AudioManager.RINGER_MODE_NORMAL;
            }
            return newRingerMode;
        }
        return getRingerModeExternal();
    }

    private boolean isAndroidNPlus(String caller) {
        try {
            final ApplicationInfo applicationInfo =
                    mContext.getPackageManager().getApplicationInfoAsUser(
                            caller, 0, UserHandle.getUserId(Binder.getCallingUid()));
            if (applicationInfo.targetSdkVersion >= Build.VERSION_CODES.N) {
                return true;
            }
            return false;
        } catch (PackageManager.NameNotFoundException e) {
            return true;
        }
    }

    private boolean wouldToggleZenMode(int newMode) {
        if (getRingerModeExternal() == AudioManager.RINGER_MODE_SILENT
                && newMode != AudioManager.RINGER_MODE_SILENT) {
            return true;
        } else if (getRingerModeExternal() != AudioManager.RINGER_MODE_SILENT
                && newMode == AudioManager.RINGER_MODE_SILENT) {
            return true;
        }
        return false;
    }

    private void onSetStreamVolume(int streamType, int index, int flags, int device,
            String caller) {
        final int stream = mStreamVolumeAlias[streamType];
        setStreamVolumeInt(stream, index, device, false, caller);
        // setting volume on ui sounds stream type also controls silent mode
        if (((flags & AudioManager.FLAG_ALLOW_RINGER_MODES) != 0) ||
                (stream == getUiSoundsStreamType())) {
            setRingerMode(getNewRingerMode(stream, index, flags),
                    TAG + ".onSetStreamVolume", false /*external*/);
        }
        // setting non-zero volume for a muted stream unmutes the stream and vice versa
        mStreamStates[stream].mute(index == 0);
    }

    /** @see AudioManager#setStreamVolume(int, int, int) */
    public void setStreamVolume(int streamType, int index, int flags, String callingPackage) {
        setStreamVolume(streamType, index, flags, callingPackage, callingPackage,
                Binder.getCallingUid());
    }

    private void setStreamVolume(int streamType, int index, int flags, String callingPackage,
            String caller, int uid) {
        if (mUseFixedVolume) {
            return;
        }

        ensureValidStreamType(streamType);
        int streamTypeAlias = mStreamVolumeAlias[streamType];
        VolumeStreamState streamState = mStreamStates[streamTypeAlias];

        final int device = getDeviceForStream(streamType);
        int oldIndex;

        // skip a2dp absolute volume control request when the device
        // is not an a2dp device
        if ((device & AudioSystem.DEVICE_OUT_ALL_A2DP) == 0 &&
            (flags & AudioManager.FLAG_BLUETOOTH_ABS_VOLUME) != 0) {
            return;
        }
        // If we are being called by the system (e.g. hardware keys) check for current user
        // so we handle user restrictions correctly.
        if (uid == android.os.Process.SYSTEM_UID) {
            uid = UserHandle.getUid(getCurrentUserId(), UserHandle.getAppId(uid));
        }
        if (mAppOps.noteOp(STREAM_VOLUME_OPS[streamTypeAlias], uid, callingPackage)
                != AppOpsManager.MODE_ALLOWED) {
            return;
        }

        if (isAndroidNPlus(callingPackage)
                && wouldToggleZenMode(getNewRingerMode(streamTypeAlias, index, flags))
                && !mNm.isNotificationPolicyAccessGrantedForPackage(callingPackage)) {
            throw new SecurityException("Not allowed to change Do Not Disturb state");
        }

        if (!volumeAdjustmentAllowedByDnd(streamTypeAlias, flags)) {
            return;
        }

        synchronized (mSafeMediaVolumeState) {
            // reset any pending volume command
            mPendingVolumeCommand = null;

            oldIndex = streamState.getIndex(device);

            index = rescaleIndex(index * 10, streamType, streamTypeAlias);

            if (streamTypeAlias == AudioSystem.STREAM_MUSIC &&
                (device & AudioSystem.DEVICE_OUT_ALL_A2DP) != 0 &&
                (flags & AudioManager.FLAG_BLUETOOTH_ABS_VOLUME) == 0) {
                synchronized (mA2dpAvrcpLock) {
                    if (mA2dp != null && mAvrcpAbsVolSupported) {
                        mA2dp.setAvrcpAbsoluteVolume(index / 10);
                    }
                }
            }

            if (streamTypeAlias == AudioSystem.STREAM_MUSIC) {
                setSystemAudioVolume(oldIndex, index, getStreamMaxVolume(streamType), flags);
            }

            flags &= ~AudioManager.FLAG_FIXED_VOLUME;
            if ((streamTypeAlias == AudioSystem.STREAM_MUSIC) &&
                    ((device & mFixedVolumeDevices) != 0)) {
                flags |= AudioManager.FLAG_FIXED_VOLUME;

                // volume is either 0 or max allowed for fixed volume devices
                if (index != 0) {
                    if (mSafeMediaVolumeState == SAFE_MEDIA_VOLUME_ACTIVE &&
                            (device & mSafeMediaVolumeDevices) != 0) {
                        index = mSafeMediaVolumeIndex;
                    } else {
                        index = streamState.getMaxIndex();
                    }
                }
            }

            if (!checkSafeMediaVolume(streamTypeAlias, index, device)) {
                mVolumeController.postDisplaySafeVolumeWarning(flags);
                mPendingVolumeCommand = new StreamVolumeCommand(
                                                    streamType, index, flags, device);
            } else {
                onSetStreamVolume(streamType, index, flags, device, caller);
                index = mStreamStates[streamType].getIndex(device);
            }
        }
        sendVolumeUpdate(streamType, oldIndex, index, flags);
    }

    // No ringer affected streams can be changed in total silence mode except those that
    // will cause the device to exit total silence mode.
    private boolean volumeAdjustmentAllowedByDnd(int streamTypeAlias, int flags) {
        if (mNm.getZenMode() == Settings.Global.ZEN_MODE_NO_INTERRUPTIONS
                && isStreamMutedByRingerMode(streamTypeAlias)) {
            if (!(((flags & AudioManager.FLAG_ALLOW_RINGER_MODES) != 0) ||
                    (streamTypeAlias == getUiSoundsStreamType()))) {
                return false;
            }
        }
        return true;
    }

    /** @see AudioManager#forceVolumeControlStream(int) */
    public void forceVolumeControlStream(int streamType, IBinder cb) {
        synchronized(mForceControlStreamLock) {
            mVolumeControlStream = streamType;
            if (mVolumeControlStream == -1) {
                if (mForceControlStreamClient != null) {
                    mForceControlStreamClient.release();
                    mForceControlStreamClient = null;
                }
            } else {
                mForceControlStreamClient = new ForceControlStreamClient(cb);
            }
        }
    }

    private class ForceControlStreamClient implements IBinder.DeathRecipient {
        private IBinder mCb; // To be notified of client's death

        ForceControlStreamClient(IBinder cb) {
            if (cb != null) {
                try {
                    cb.linkToDeath(this, 0);
                } catch (RemoteException e) {
                    // Client has died!
                    Log.w(TAG, "ForceControlStreamClient() could not link to "+cb+" binder death");
                    cb = null;
                }
            }
            mCb = cb;
        }

        public void binderDied() {
            synchronized(mForceControlStreamLock) {
                Log.w(TAG, "SCO client died");
                if (mForceControlStreamClient != this) {
                    Log.w(TAG, "unregistered control stream client died");
                } else {
                    mForceControlStreamClient = null;
                    mVolumeControlStream = -1;
                }
            }
        }

        public void release() {
            if (mCb != null) {
                mCb.unlinkToDeath(this, 0);
                mCb = null;
            }
        }
    }

    private void sendBroadcastToAll(Intent intent) {
        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
        intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
        final long ident = Binder.clearCallingIdentity();
        try {
            mContext.sendBroadcastAsUser(intent, UserHandle.ALL);
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    private void sendStickyBroadcastToAll(Intent intent) {
        intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
        final long ident = Binder.clearCallingIdentity();
        try {
            mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
    }

    private int getCurrentUserId() {
        final long ident = Binder.clearCallingIdentity();
        try {
            UserInfo currentUser = ActivityManagerNative.getDefault().getCurrentUser();
            return currentUser.id;
        } catch (RemoteException e) {
            // Activity manager not running, nothing we can do assume user 0.
        } finally {
            Binder.restoreCallingIdentity(ident);
        }
        return UserHandle.USER_SYSTEM;
    }

    // UI update and Broadcast Intent
    private void sendVolumeUpdate(int streamType, int oldIndex, int index, int flags) {
        streamType = mStreamVolumeAlias[streamType];

        if (streamType == AudioSystem.STREAM_MUSIC) {
            flags = updateFlagsForSystemAudio(flags);
        }
        mVolumeController.postVolumeChanged(streamType, flags);
    }

    // If Hdmi-CEC system audio mode is on, we show volume bar only when TV
    // receives volume notification from Audio Receiver.
    private int updateFlagsForSystemAudio(int flags) {
        if (mHdmiTvClient != null) {
            synchronized (mHdmiTvClient) {
                if (mHdmiSystemAudioSupported &&
                        ((flags & AudioManager.FLAG_HDMI_SYSTEM_AUDIO_VOLUME) == 0)) {
                    flags &= ~AudioManager.FLAG_SHOW_UI;
                }
            }
        }
        return flags;
    }

    // UI update and Broadcast Intent
    private void sendMasterMuteUpdate(boolean muted, int flags) {
        mVolumeController.postMasterMuteChanged(updateFlagsForSystemAudio(flags));
        broadcastMasterMuteStatus(muted);
    }

    private void broadcastMasterMuteStatus(boolean muted) {
        Intent intent = new Intent(AudioManager.MASTER_MUTE_CHANGED_ACTION);
        intent.putExtra(AudioManager.EXTRA_MASTER_VOLUME_MUTED, muted);
        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT
                | Intent.FLAG_RECEIVER_REPLACE_PENDING);
        sendStickyBroadcastToAll(intent);
    }

    /**
     * Sets the stream state's index, and posts a message to set system volume.
     * This will not call out to the UI. Assumes a valid stream type.
     *
     * @param streamType Type of the stream
     * @param index Desired volume index of the stream
     * @param device the device whose volume must be changed
     * @param force If true, set the volume even if the desired volume is same
     * as the current volume.
     */
    private void setStreamVolumeInt(int streamType,
                                    int index,
                                    int device,
                                    boolean force,
                                    String caller) {
        VolumeStreamState streamState = mStreamStates[streamType];

        if (streamState.setIndex(index, device, caller) || force) {
            // Post message to set system volume (it in turn will post a message
            // to persist).
            sendMsg(mAudioHandler,
                    MSG_SET_DEVICE_VOLUME,
                    SENDMSG_QUEUE,
                    device,
                    0,
                    streamState,
                    0);
        }
    }

    private void setSystemAudioMute(boolean state) {
        if (mHdmiManager == null || mHdmiTvClient == null) return;
        synchronized (mHdmiManager) {
            if (!mHdmiSystemAudioSupported) return;
            synchronized (mHdmiTvClient) {
                final long token = Binder.clearCallingIdentity();
                try {
                    mHdmiTvClient.setSystemAudioMute(state);
                } finally {
                    Binder.restoreCallingIdentity(token);
                }
            }
        }
    }

    /** get stream mute state. */
    public boolean isStreamMute(int streamType) {
        if (streamType == AudioManager.USE_DEFAULT_STREAM_TYPE) {
            streamType = getActiveStreamType(streamType);
        }
        synchronized (VolumeStreamState.class) {
            return mStreamStates[streamType].mIsMuted;
        }
    }

    private class RmtSbmxFullVolDeathHandler implements IBinder.DeathRecipient {
        private IBinder mICallback; // To be notified of client's death

        RmtSbmxFullVolDeathHandler(IBinder cb) {
            mICallback = cb;
            try {
                cb.linkToDeath(this, 0/*flags*/);
            } catch (RemoteException e) {
                Log.e(TAG, "can't link to death", e);
            }
        }

        boolean isHandlerFor(IBinder cb) {
            return mICallback.equals(cb);
        }

        void forget() {
            try {
                mICallback.unlinkToDeath(this, 0/*flags*/);
            } catch (NoSuchElementException e) {
                Log.e(TAG, "error unlinking to death", e);
            }
        }

        public void binderDied() {
            Log.w(TAG, "Recorder with remote submix at full volume died " + mICallback);
            forceRemoteSubmixFullVolume(false, mICallback);
        }
    }

    /**
     * call must be synchronized on mRmtSbmxFullVolDeathHandlers
     * @return true if there is a registered death handler, false otherwise */
    private boolean discardRmtSbmxFullVolDeathHandlerFor(IBinder cb) {
        Iterator<RmtSbmxFullVolDeathHandler> it = mRmtSbmxFullVolDeathHandlers.iterator();
        while (it.hasNext()) {
            final RmtSbmxFullVolDeathHandler handler = it.next();
            if (handler.isHandlerFor(cb)) {
                handler.forget();
                mRmtSbmxFullVolDeathHandlers.remove(handler);
                return true;
            }
        }
        return false;
    }

    /** call synchronized on mRmtSbmxFullVolDeathHandlers */
    private boolean hasRmtSbmxFullVolDeathHandlerFor(IBinder cb) {
        Iterator<RmtSbmxFullVolDeathHandler> it = mRmtSbmxFullVolDeathHandlers.iterator();
        while (it.hasNext()) {
            if (it.next().isHandlerFor(cb)) {
                return true;
            }
        }
        return false;
    }

    private int mRmtSbmxFullVolRefCount = 0;
    private ArrayList<RmtSbmxFullVolDeathHandler> mRmtSbmxFullVolDeathHandlers =
            new ArrayList<RmtSbmxFullVolDeathHandler>();

    public void forceRemoteSubmixFullVolume(boolean startForcing, IBinder cb) {
        if (cb == null) {
            return;
        }
        if ((PackageManager.PERMISSION_GRANTED != mContext.checkCallingOrSelfPermission(
                        android.Manifest.permission.CAPTURE_AUDIO_OUTPUT))) {
            Log.w(TAG, "Trying to call forceRemoteSubmixFullVolume() without CAPTURE_AUDIO_OUTPUT");
            return;
        }
        synchronized(mRmtSbmxFullVolDeathHandlers) {
            boolean applyRequired = false;
            if (startForcing) {
                if (!hasRmtSbmxFullVolDeathHandlerFor(cb)) {
                    mRmtSbmxFullVolDeathHandlers.add(new RmtSbmxFullVolDeathHandler(cb));
                    if (mRmtSbmxFullVolRefCount == 0) {
                        mFullVolumeDevices |= AudioSystem.DEVICE_OUT_REMOTE_SUBMIX;
                        mFixedVolumeDevices |= AudioSystem.DEVICE_OUT_REMOTE_SUBMIX;
                        applyRequired = true;
                    }
                    mRmtSbmxFullVolRefCount++;
                }
            } else {
                if (discardRmtSbmxFullVolDeathHandlerFor(cb) && (mRmtSbmxFullVolRefCount > 0)) {
                    mRmtSbmxFullVolRefCount--;
                    if (mRmtSbmxFullVolRefCount == 0) {
                        mFullVolumeDevices &= ~AudioSystem.DEVICE_OUT_REMOTE_SUBMIX;
                        mFixedVolumeDevices &= ~AudioSystem.DEVICE_OUT_REMOTE_SUBMIX;
                        applyRequired = true;
                    }
                }
            }
            if (applyRequired) {
                // Assumes only STREAM_MUSIC going through DEVICE_OUT_REMOTE_SUBMIX
                checkAllFixedVolumeDevices(AudioSystem.STREAM_MUSIC);
                mStreamStates[AudioSystem.STREAM_MUSIC].applyAllVolumes();
            }
        }
    }

    private void setMasterMuteInternal(boolean mute, int flags, String callingPackage, int uid,
            int userId) {
        // If we are being called by the system check for user we are going to change
        // so we handle user restrictions correctly.
        if (uid == android.os.Process.SYSTEM_UID) {
            uid = UserHandle.getUid(userId, UserHandle.getAppId(uid));
        }
        // If OP_AUDIO_MASTER_VOLUME is set, disallow unmuting.
        if (!mute && mAppOps.noteOp(AppOpsManager.OP_AUDIO_MASTER_VOLUME, uid, callingPackage)
                != AppOpsManager.MODE_ALLOWED) {
            return;
        }
        if (userId != UserHandle.getCallingUserId() &&
                mContext.checkCallingOrSelfPermission(
                        android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
                != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        setMasterMuteInternalNoCallerCheck(mute, flags, userId);
    }

    private void setMasterMuteInternalNoCallerCheck(boolean mute, int flags, int userId) {
        if (DEBUG_VOL) {
            Log.d(TAG, String.format("Master mute %s, %d, user=%d", mute, flags, userId));
        }
        if (mUseFixedVolume) {
            return; // If using fixed volume, we don't mute.
        }
        if (getCurrentUserId() == userId) {
            if (mute != AudioSystem.getMasterMute()) {
                setSystemAudioMute(mute);
                AudioSystem.setMasterMute(mute);
                sendMasterMuteUpdate(mute, flags);

                Intent intent = new Intent(AudioManager.MASTER_MUTE_CHANGED_ACTION);
                intent.putExtra(AudioManager.EXTRA_MASTER_VOLUME_MUTED, mute);
                sendBroadcastToAll(intent);
            }
        }
    }

    /** get master mute state. */
    public boolean isMasterMute() {
        return AudioSystem.getMasterMute();
    }

    public void setMasterMute(boolean mute, int flags, String callingPackage, int userId) {
        setMasterMuteInternal(mute, flags, callingPackage, Binder.getCallingUid(),
                userId);
    }

    /** @see AudioManager#getStreamVolume(int) */
    public int getStreamVolume(int streamType) {
        ensureValidStreamType(streamType);
        int device = getDeviceForStream(streamType);
        synchronized (VolumeStreamState.class) {
            int index = mStreamStates[streamType].getIndex(device);

            // by convention getStreamVolume() returns 0 when a stream is muted.
            if (mStreamStates[streamType].mIsMuted) {
                index = 0;
            }
            if (index != 0 && (mStreamVolumeAlias[streamType] == AudioSystem.STREAM_MUSIC) &&
                    (device & mFixedVolumeDevices) != 0) {
                index = mStreamStates[streamType].getMaxIndex();
            }
            return (index + 5) / 10;
        }
    }

    /** @see AudioManager#getStreamMaxVolume(int) */
    public int getStreamMaxVolume(int streamType) {
        ensureValidStreamType(streamType);
        return (mStreamStates[streamType].getMaxIndex() + 5) / 10;
    }

    /** @see AudioManager#getStreamMinVolume(int) */
    public int getStreamMinVolume(int streamType) {
        ensureValidStreamType(streamType);
        return (mStreamStates[streamType].getMinIndex() + 5) / 10;
    }

    /** Get last audible volume before stream was muted. */
    public int getLastAudibleStreamVolume(int streamType) {
        ensureValidStreamType(streamType);
        int device = getDeviceForStream(streamType);
        return (mStreamStates[streamType].getIndex(device) + 5) / 10;
    }

    /** @see AudioManager#getUiSoundsStreamType()  */
    public int getUiSoundsStreamType() {
        return mStreamVolumeAlias[AudioSystem.STREAM_SYSTEM];
    }

    /** @see AudioManager#setMicrophoneMute(boolean) */
    @Override
    public void setMicrophoneMute(boolean on, String callingPackage, int userId) {
        // If we are being called by the system check for user we are going to change
        // so we handle user restrictions correctly.
        int uid = Binder.getCallingUid();
        if (uid == android.os.Process.SYSTEM_UID) {
            uid = UserHandle.getUid(userId, UserHandle.getAppId(uid));
        }
        // If OP_MUTE_MICROPHONE is set, disallow unmuting.
        if (!on && mAppOps.noteOp(AppOpsManager.OP_MUTE_MICROPHONE, uid, callingPackage)
                != AppOpsManager.MODE_ALLOWED) {
            return;
        }
        if (!checkAudioSettingsPermission("setMicrophoneMute()")) {
            return;
        }
        if (userId != UserHandle.getCallingUserId() &&
                mContext.checkCallingOrSelfPermission(
                android.Manifest.permission.INTERACT_ACROSS_USERS_FULL)
                != PackageManager.PERMISSION_GRANTED) {
            return;
        }
        setMicrophoneMuteNoCallerCheck(on, userId);
    }

    private void setMicrophoneMuteNoCallerCheck(boolean on, int userId) {
        if (DEBUG_VOL) {
            Log.d(TAG, String.format("Mic mute %s, user=%d", on, userId));
        }
        // If mute is for current user actually mute, else just persist the setting
        // which will be loaded on user switch.
        if (getCurrentUserId() == userId) {
            AudioSystem.muteMicrophone(on);
        }
        // Post a persist microphone msg.
    }

    @Override
    public int getRingerModeExternal() {
        synchronized(mSettingsLock) {
            return mRingerModeExternal;
        }
    }

    @Override
    public int getRingerModeInternal() {
        synchronized(mSettingsLock) {
            return mRingerMode;
        }
    }

    private void ensureValidRingerMode(int ringerMode) {
        if (!isValidRingerMode(ringerMode)) {
            throw new IllegalArgumentException("Bad ringer mode " + ringerMode);
        }
    }

    /** @see AudioManager#isValidRingerMode(int) */
    public boolean isValidRingerMode(int ringerMode) {
        return ringerMode >= 0 && ringerMode <= AudioManager.RINGER_MODE_MAX;
    }

    public void setRingerModeExternal(int ringerMode, String caller) {
        if (isAndroidNPlus(caller) && wouldToggleZenMode(ringerMode)
                && !mNm.isNotificationPolicyAccessGrantedForPackage(caller)) {
            throw new SecurityException("Not allowed to change Do Not Disturb state");
        }

        setRingerMode(ringerMode, caller, true /*external*/);
    }

    public void setRingerModeInternal(int ringerMode, String caller) {
        enforceVolumeController("setRingerModeInternal");
        setRingerMode(ringerMode, caller, false /*external*/);
    }

    private void setRingerMode(int ringerMode, String caller, boolean external) {
        if (mUseFixedVolume || isPlatformTelevision()) {
            return;
        }
        if (caller == null || caller.length() == 0) {
            throw new IllegalArgumentException("Bad caller: " + caller);
        }
        ensureValidRingerMode(ringerMode);
        if ((ringerMode == AudioManager.RINGER_MODE_VIBRATE) && !mHasVibrator) {
            ringerMode = AudioManager.RINGER_MODE_SILENT;
        }
        final long identity = Binder.clearCallingIdentity();
        try {
            synchronized (mSettingsLock) {
                final int ringerModeInternal = getRingerModeInternal();
                final int ringerModeExternal = getRingerModeExternal();
                if (external) {
                    setRingerModeExt(ringerMode);
                    if (mRingerModeDelegate != null) {
                        ringerMode = mRingerModeDelegate.onSetRingerModeExternal(ringerModeExternal,
                                ringerMode, caller, ringerModeInternal, mVolumePolicy);
                    }
                    if (ringerMode != ringerModeInternal) {
                        setRingerModeInt(ringerMode, true /*persist*/);
                    }
                } else /*internal*/ {
                    if (ringerMode != ringerModeInternal) {
                        setRingerModeInt(ringerMode, true /*persist*/);
                    }
                    if (mRingerModeDelegate != null) {
                        ringerMode = mRingerModeDelegate.onSetRingerModeInternal(ringerModeInternal,
                                ringerMode, caller, ringerModeExternal, mVolumePolicy);
                    }
                    setRingerModeExt(ringerMode);
                }
            }
        } finally {
            Binder.restoreCallingIdentity(identity);
        }
    }

    private void setRingerModeExt(int ringerMode) {
        synchronized(mSettingsLock) {
            if (ringerMode == mRingerModeExternal) return;
            mRingerModeExternal = ringerMode;
        }
        // Send sticky broadcast
        broadcastRingerMode(AudioManager.RINGER_MODE_CHANGED_ACTION, ringerMode);
    }

    private void muteRingerModeStreams() {
        // Mute stream if not previously muted by ringer mode and ringer mode
        // is not RINGER_MODE_NORMAL and stream is affected by ringer mode.
        // Unmute stream if previously muted by ringer mode and ringer mode
        // is RINGER_MODE_NORMAL or stream is not affected by ringer mode.
        int numStreamTypes = AudioSystem.getNumStreamTypes();
        final boolean ringerModeMute = mRingerMode == AudioManager.RINGER_MODE_VIBRATE
                || mRingerMode == AudioManager.RINGER_MODE_SILENT;
        for (int streamType = numStreamTypes - 1; streamType >= 0; streamType--) {
            final boolean isMuted = isStreamMutedByRingerMode(streamType);
            final boolean shouldMute = ringerModeMute && isStreamAffectedByRingerMode(streamType);
            if (isMuted == shouldMute) continue;
            if (!shouldMute) {
                // unmute
                // ring and notifications volume should never be 0 when not silenced
                if (mStreamVolumeAlias[streamType] == AudioSystem.STREAM_RING) {
                    synchronized (VolumeStreamState.class) {
                        final VolumeStreamState vss = mStreamStates[streamType];
                        for (int i = 0; i < vss.mIndexMap.size(); i++) {
                            int device = vss.mIndexMap.keyAt(i);
                            int value = vss.mIndexMap.valueAt(i);
                            if (value == 0) {
                                vss.setIndex(10, device, TAG);
                            }
                        }
                        // Persist volume for stream ring when it is changed here
                      final int device = getDeviceForStream(streamType);
                      sendMsg(mAudioHandler,
                              MSG_PERSIST_VOLUME,
                              SENDMSG_QUEUE,
                              device,
                              0,
                              mStreamStates[streamType],
                              PERSIST_DELAY);
                    }
                }
                mStreamStates[streamType].mute(false);
                mRingerModeMutedStreams &= ~(1 << streamType);
            } else {
                // mute
                mStreamStates[streamType].mute(true);
                mRingerModeMutedStreams |= (1 << streamType);
            }
        }
    }

    private void setRingerModeInt(int ringerMode, boolean persist) {
        final boolean change;
        synchronized(mSettingsLock) {
            change = mRingerMode != ringerMode;
            mRingerMode = ringerMode;
        }

        muteRingerModeStreams();

        // Post a persist ringer mode msg
        if (persist) {
            sendMsg(mAudioHandler, MSG_PERSIST_RINGER_MODE,
                    SENDMSG_REPLACE, 0, 0, null, PERSIST_DELAY);
        }
        if (change) {
            // Send sticky broadcast
            broadcastRingerMode(AudioManager.INTERNAL_RINGER_MODE_CHANGED_ACTION, ringerMode);
        }
    }

    /** @see AudioManager#shouldVibrate(int) */
    public boolean shouldVibrate(int vibrateType) {
        if (!mHasVibrator) return false;

        switch (getVibrateSetting(vibrateType)) {

            case AudioManager.VIBRATE_SETTING_ON:
                return getRingerModeExternal() != AudioManager.RINGER_MODE_SILENT;

            case AudioManager.VIBRATE_SETTING_ONLY_SILENT:
                return getRingerModeExternal() == AudioManager.RINGER_MODE_VIBRATE;

            case AudioManager.VIBRATE_SETTING_OFF:
                // return false, even for incoming calls
                return false;

            default:
                return false;
        }
    }

    /** @see AudioManager#getVibrateSetting(int) */
    public int getVibrateSetting(int vibrateType) {
        if (!mHasVibrator) return AudioManager.VIBRATE_SETTING_OFF;
        return (mVibrateSetting >> (vibrateType * 2)) & 3;
    }

    /** @see AudioManager#setVibrateSetting(int, int) */
    public void setVibrateSetting(int vibrateType, int vibrateSetting) {

        if (!mHasVibrator) return;

        mVibrateSetting = AudioSystem.getValueForVibrateSetting(mVibrateSetting, vibrateType,
                vibrateSetting);

        // Broadcast change
        broadcastVibrateSetting(vibrateType);

    }

    private class SetModeDeathHandler implements IBinder.DeathRecipient {
        private IBinder mCb; // To be notified of client's death
        private int mPid;
        private int mMode = AudioSystem.MODE_NORMAL; // Current mode set by this client

        SetModeDeathHandler(IBinder cb, int pid) {
            mCb = cb;
            mPid = pid;
        }

        public void binderDied() {
            int newModeOwnerPid = 0;
            synchronized(mSetModeDeathHandlers) {
                Log.w(TAG, "setMode() client died");
                int index = mSetModeDeathHandlers.indexOf(this);
                if (index < 0) {
                    Log.w(TAG, "unregistered setMode() client died");
                } else {
                    newModeOwnerPid = setModeInt(AudioSystem.MODE_NORMAL, mCb, mPid, TAG);
                }
            }
            // when entering RINGTONE, IN_CALL or IN_COMMUNICATION mode, clear all
            // SCO connections not started by the application changing the mode
            if (newModeOwnerPid != 0) {
                final long ident = Binder.clearCallingIdentity();
                disconnectBluetoothSco(newModeOwnerPid);
                Binder.restoreCallingIdentity(ident);
            }
        }

        public int getPid() {
            return mPid;
        }

        public void setMode(int mode) {
            mMode = mode;
        }

        public int getMode() {
            return mMode;
        }

        public IBinder getBinder() {
            return mCb;
        }
    }

    /** @see AudioManager#setMode(int) */
    public void setMode(int mode, IBinder cb, String callingPackage) {
        if (DEBUG_MODE) { Log.v(TAG, "setMode(mode=" + mode + ", callingPackage=" + callingPackage + ")"); }
        if (!checkAudioSettingsPermission("setMode()")) {
            return;
        }

        if ( (mode == AudioSystem.MODE_IN_CALL) &&
                (mContext.checkCallingOrSelfPermission(
                        android.Manifest.permission.MODIFY_PHONE_STATE)
                            != PackageManager.PERMISSION_GRANTED)) {
            Log.w(TAG, "MODIFY_PHONE_STATE Permission Denial: setMode(MODE_IN_CALL) from pid="
                    + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid());
            return;
        }

        if (mode < AudioSystem.MODE_CURRENT || mode >= AudioSystem.NUM_MODES) {
            return;
        }

        int newModeOwnerPid = 0;
        synchronized(mSetModeDeathHandlers) {
            if (mode == AudioSystem.MODE_CURRENT) {
                mode = mMode;
            }
            newModeOwnerPid = setModeInt(mode, cb, Binder.getCallingPid(), callingPackage);
        }
        // when entering RINGTONE, IN_CALL or IN_COMMUNICATION mode, clear all
        // SCO connections not started by the application changing the mode
        if (newModeOwnerPid != 0) {
             disconnectBluetoothSco(newModeOwnerPid);
        }
    }

    // must be called synchronized on mSetModeDeathHandlers
    // setModeInt() returns a valid PID if the audio mode was successfully set to
    // any mode other than NORMAL.
    private int setModeInt(int mode, IBinder cb, int pid, String caller) {
        if (DEBUG_MODE) { Log.v(TAG, "setModeInt(mode=" + mode + ", pid=" + pid + ", caller="
                + caller + ")"); }
        int newModeOwnerPid = 0;
        if (cb == null) {
            Log.e(TAG, "setModeInt() called with null binder");
            return newModeOwnerPid;
        }

        SetModeDeathHandler hdlr = null;
        Iterator iter = mSetModeDeathHandlers.iterator();
        while (iter.hasNext()) {
            SetModeDeathHandler h = (SetModeDeathHandler)iter.next();
            if (h.getPid() == pid) {
                hdlr = h;
                // Remove from client list so that it is re-inserted at top of list
                iter.remove();
                hdlr.getBinder().unlinkToDeath(hdlr, 0);
                break;
            }
        }
        int status = AudioSystem.AUDIO_STATUS_OK;
        do {
            if (mode == AudioSystem.MODE_NORMAL) {
                // get new mode from client at top the list if any
                if (!mSetModeDeathHandlers.isEmpty()) {
                    hdlr = mSetModeDeathHandlers.get(0);
                    cb = hdlr.getBinder();
                    mode = hdlr.getMode();
                    if (DEBUG_MODE) {
                        Log.w(TAG, " using mode=" + mode + " instead due to death hdlr at pid="
                                + hdlr.mPid);
                    }
                }
            } else {
                if (hdlr == null) {
                    hdlr = new SetModeDeathHandler(cb, pid);
                }
                // Register for client death notification
                try {
                    cb.linkToDeath(hdlr, 0);
                } catch (RemoteException e) {
                    // Client has died!
                    Log.w(TAG, "setMode() could not link to "+cb+" binder death");
                }

                // Last client to call setMode() is always at top of client list
                // as required by SetModeDeathHandler.binderDied()
                mSetModeDeathHandlers.add(0, hdlr);
                hdlr.setMode(mode);
            }

            if (mode != mMode) {
                status = AudioSystem.setPhoneState(mode);
                if (status == AudioSystem.AUDIO_STATUS_OK) {
                    if (DEBUG_MODE) { Log.v(TAG, " mode successfully set to " + mode); }
                    mMode = mode;
                } else {
                    if (hdlr != null) {
                        mSetModeDeathHandlers.remove(hdlr);
                        cb.unlinkToDeath(hdlr, 0);
                    }
                    // force reading new top of mSetModeDeathHandlers stack
                    if (DEBUG_MODE) { Log.w(TAG, " mode set to MODE_NORMAL after phoneState pb"); }
                    mode = AudioSystem.MODE_NORMAL;
                }
            } else {
                status = AudioSystem.AUDIO_STATUS_OK;
            }
        } while (status != AudioSystem.AUDIO_STATUS_OK && !mSetModeDeathHandlers.isEmpty());

        if (status == AudioSystem.AUDIO_STATUS_OK) {
            if (mode != AudioSystem.MODE_NORMAL) {
                if (mSetModeDeathHandlers.isEmpty()) {
                    Log.e(TAG, "setMode() different from MODE_NORMAL with empty mode client stack");
                } else {
                    newModeOwnerPid = mSetModeDeathHandlers.get(0).getPid();
                }
            }
            int streamType = getActiveStreamType(AudioManager.USE_DEFAULT_STREAM_TYPE);
            int device = getDeviceForStream(streamType);
            int index = mStreamStates[mStreamVolumeAlias[streamType]].getIndex(device);
            setStreamVolumeInt(mStreamVolumeAlias[streamType], index, device, true, caller);

            updateStreamVolumeAlias(true /*updateVolumes*/, caller);
        }
        return newModeOwnerPid;
    }

    /** @see AudioManager#getMode() */
    public int getMode() {
        return mMode;
    }

    //==========================================================================================
    // Sound Effects
    //==========================================================================================

    private static final String TAG_AUDIO_ASSETS = "audio_assets";
    private static final String ATTR_VERSION = "version";
    private static final String TAG_GROUP = "group";
    private static final String ATTR_GROUP_NAME = "name";
    private static final String TAG_ASSET = "asset";
    private static final String ATTR_ASSET_ID = "id";
    private static final String ATTR_ASSET_FILE = "file";

    private static final String ASSET_FILE_VERSION = "1.0";
    private static final String GROUP_TOUCH_SOUNDS = "touch_sounds";

    private static final int SOUND_EFFECTS_LOAD_TIMEOUT_MS = 5000;

    class LoadSoundEffectReply {
        public int mStatus = 1;
    };

    private void loadTouchSoundAssetDefaults() {
        SOUND_EFFECT_FILES.add("Effect_Tick.ogg");
        for (int i = 0; i < AudioManager.NUM_SOUND_EFFECTS; i++) {
            SOUND_EFFECT_FILES_MAP[i][0] = 0;
            SOUND_EFFECT_FILES_MAP[i][1] = -1;
        }
    }

    private void loadTouchSoundAssets() {
        XmlResourceParser parser = null;

        // only load assets once.
        if (!SOUND_EFFECT_FILES.isEmpty()) {
            return;
        }

        loadTouchSoundAssetDefaults();

        try {
            parser = mContext.getResources().getXml(com.android.internal.R.xml.audio_assets);

            XmlUtils.beginDocument(parser, TAG_AUDIO_ASSETS);
            String version = parser.getAttributeValue(null, ATTR_VERSION);
            boolean inTouchSoundsGroup = false;

            if (ASSET_FILE_VERSION.equals(version)) {
                while (true) {
                    XmlUtils.nextElement(parser);
                    String element = parser.getName();
                    if (element == null) {
                        break;
                    }
                    if (element.equals(TAG_GROUP)) {
                        String name = parser.getAttributeValue(null, ATTR_GROUP_NAME);
                        if (GROUP_TOUCH_SOUNDS.equals(name)) {
                            inTouchSoundsGroup = true;
                            break;
                        }
                    }
                }
                while (inTouchSoundsGroup) {
                    XmlUtils.nextElement(parser);
                    String element = parser.getName();
                    if (element == null) {
                        break;
                    }
                    if (element.equals(TAG_ASSET)) {
                        String id = parser.getAttributeValue(null, ATTR_ASSET_ID);
                        String file = parser.getAttributeValue(null, ATTR_ASSET_FILE);
                        int fx;

                        try {
                            Field field = AudioManager.class.getField(id);
                            fx = field.getInt(null);
                        } catch (Exception e) {
                            Log.w(TAG, "Invalid touch sound ID: "+id);
                            continue;
                        }

                        int i = SOUND_EFFECT_FILES.indexOf(file);
                        if (i == -1) {
                            i = SOUND_EFFECT_FILES.size();
                            SOUND_EFFECT_FILES.add(file);
                        }
                        SOUND_EFFECT_FILES_MAP[fx][0] = i;
                    } else {
                        break;
                    }
                }
            }
        } catch (Resources.NotFoundException e) {
            Log.w(TAG, "audio assets file not found", e);
        } catch (XmlPullParserException e) {
            Log.w(TAG, "XML parser exception reading touch sound assets", e);
        } catch (IOException e) {
            Log.w(TAG, "I/O exception reading touch sound assets", e);
        } finally {
            if (parser != null) {
                parser.close();
            }
        }
    }

    /** @see AudioManager#playSoundEffect(int) */
    public void playSoundEffect(int effectType) {
        playSoundEffectVolume(effectType, -1.0f);
    }

    /** @see AudioManager#playSoundEffect(int, float) */
    public void playSoundEffectVolume(int effectType, float volume) {
        if (effectType >= AudioManager.NUM_SOUND_EFFECTS || effectType < 0) {
            Log.w(TAG, "AudioService effectType value " + effectType + " out of range");
            return;
        }

        sendMsg(mAudioHandler, MSG_PLAY_SOUND_EFFECT, SENDMSG_QUEUE,
                effectType, (int) (volume * 1000), null, 0);
    }

    /**
     * Loads samples into the soundpool.
     * This method must be called at first when sound effects are enabled
     */
    public boolean loadSoundEffects() {
        int attempts = 3;
        LoadSoundEffectReply reply = new LoadSoundEffectReply();

        synchronized (reply) {
            sendMsg(mAudioHandler, MSG_LOAD_SOUND_EFFECTS, SENDMSG_QUEUE, 0, 0, reply, 0);
            while ((reply.mStatus == 1) && (attempts-- > 0)) {
                try {
                    reply.wait(SOUND_EFFECTS_LOAD_TIMEOUT_MS);
                } catch (InterruptedException e) {
                    Log.w(TAG, "loadSoundEffects Interrupted while waiting sound pool loaded.");
                }
            }
        }
        return (reply.mStatus == 0);
    }

    /**
     *  Unloads samples from the sound pool.
     *  This method can be called to free some memory when
     *  sound effects are disabled.
     */
    public void unloadSoundEffects() {
        sendMsg(mAudioHandler, MSG_UNLOAD_SOUND_EFFECTS, SENDMSG_QUEUE, 0, 0, null, 0);
    }

    class SoundPoolListenerThread extends Thread {
        public SoundPoolListenerThread() {
            super("SoundPoolListenerThread");
        }

        @Override
        public void run() {

            Looper.prepare();
            mSoundPoolLooper = Looper.myLooper();

            synchronized (mSoundEffectsLock) {
                if (mSoundPool != null) {
                    mSoundPoolCallBack = new SoundPoolCallback();
                    mSoundPool.setOnLoadCompleteListener(mSoundPoolCallBack);
                }
                mSoundEffectsLock.notify();
            }
            Looper.loop();
        }
    }

    private final class SoundPoolCallback implements
            android.media.SoundPool.OnLoadCompleteListener {

        int mStatus = 1; // 1 means neither error nor last sample loaded yet
        List<Integer> mSamples = new ArrayList<Integer>();

        public int status() {
            return mStatus;
        }

        public void setSamples(int[] samples) {
            for (int i = 0; i < samples.length; i++) {
                // do not wait ack for samples rejected upfront by SoundPool
                if (samples[i] > 0) {
                    mSamples.add(samples[i]);
                }
            }
        }

        public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
            synchronized (mSoundEffectsLock) {
                int i = mSamples.indexOf(sampleId);
                if (i >= 0) {
                    mSamples.remove(i);
                }
                if ((status != 0) || mSamples. isEmpty()) {
                    mStatus = status;
                    mSoundEffectsLock.notify();
                }
            }
        }
    }

    /** @see AudioManager#reloadAudioSettings() */
    public void reloadAudioSettings() {
        readAudioSettings(false /*userSwitch*/);
    }

    private void readAudioSettings(boolean userSwitch) {
        // restore ringer mode, ringer mode affected streams, mute affected streams and vibrate settings
        readPersistedSettings();
        readUserRestrictions();

        // restore volume settings
        int numStreamTypes = AudioSystem.getNumStreamTypes();
        for (int streamType = 0; streamType < numStreamTypes; streamType++) {
            VolumeStreamState streamState = mStreamStates[streamType];

            if (userSwitch && mStreamVolumeAlias[streamType] == AudioSystem.STREAM_MUSIC) {
                continue;
            }

            streamState.readSettings();
            synchronized (VolumeStreamState.class) {
                // unmute stream that was muted but is not affect by mute anymore
                if (streamState.mIsMuted && ((!isStreamAffectedByMute(streamType) &&
                        !isStreamMutedByRingerMode(streamType)) || mUseFixedVolume)) {
                    streamState.mIsMuted = false;
                }
            }
        }

        // apply new ringer mode before checking volume for alias streams so that streams
        // muted by ringer mode have the correct volume
        setRingerModeInt(getRingerModeInternal(), false);

        checkAllFixedVolumeDevices();
        checkAllAliasStreamVolumes();
        checkMuteAffectedStreams();

        synchronized (mSafeMediaVolumeState) {
            mMusicActiveMs = MathUtils.constrain(Settings.Secure.getIntForUser(mContentResolver,
                    Settings.Secure.UNSAFE_VOLUME_MUSIC_ACTIVE_MS, 0, UserHandle.USER_CURRENT),
                    0, UNSAFE_VOLUME_MUSIC_ACTIVE_MS_MAX);
            if (mSafeMediaVolumeState == SAFE_MEDIA_VOLUME_ACTIVE) {
                enforceSafeMediaVolume(TAG);
            }
        }
    }

    /** @see AudioManager#setSpeakerphoneOn(boolean) */
    public void setSpeakerphoneOn(boolean on){
        if (!checkAudioSettingsPermission("setSpeakerphoneOn()")) {
            return;
        }

        if (on) {
            if (mForcedUseForComm == AudioSystem.FORCE_BT_SCO) {
                    sendMsg(mAudioHandler, MSG_SET_FORCE_USE, SENDMSG_QUEUE,
                            AudioSystem.FOR_RECORD, AudioSystem.FORCE_NONE, null, 0);
            }
            mForcedUseForComm = AudioSystem.FORCE_SPEAKER;
        } else if (mForcedUseForComm == AudioSystem.FORCE_SPEAKER){
            mForcedUseForComm = AudioSystem.FORCE_NONE;
        }

        sendMsg(mAudioHandler, MSG_SET_FORCE_USE, SENDMSG_QUEUE,
                AudioSystem.FOR_COMMUNICATION, mForcedUseForComm, null, 0);
    }

    /** @see AudioManager#isSpeakerphoneOn() */
    public boolean isSpeakerphoneOn() {
        return (mForcedUseForComm == AudioSystem.FORCE_SPEAKER);
    }

    /** @see AudioManager#setBluetoothScoOn(boolean) */
    public void setBluetoothScoOn(boolean on) {
        if (!checkAudioSettingsPermission("setBluetoothScoOn()")) {
            return;
        }
        setBluetoothScoOnInt(on);
    }

    public void setBluetoothScoOnInt(boolean on) {
        if (on) {
            mForcedUseForComm = AudioSystem.FORCE_BT_SCO;
        } else if (mForcedUseForComm == AudioSystem.FORCE_BT_SCO) {
            mForcedUseForComm = AudioSystem.FORCE_NONE;
        }

        sendMsg(mAudioHandler, MSG_SET_FORCE_USE, SENDMSG_QUEUE,
                AudioSystem.FOR_COMMUNICATION, mForcedUseForComm, null, 0);
        sendMsg(mAudioHandler, MSG_SET_FORCE_USE, SENDMSG_QUEUE,
                AudioSystem.FOR_RECORD, mForcedUseForComm, null, 0);
    }

    /** @see AudioManager#isBluetoothScoOn() */
    public boolean isBluetoothScoOn() {
        return (mForcedUseForComm == AudioSystem.FORCE_BT_SCO);
    }

    /** @see AudioManager#setBluetoothA2dpOn(boolean) */
    public void setBluetoothA2dpOn(boolean on) {
        synchronized (mBluetoothA2dpEnabledLock) {
            mBluetoothA2dpEnabled = on;
            sendMsg(mAudioHandler, MSG_SET_FORCE_BT_A2DP_USE, SENDMSG_QUEUE,
                    AudioSystem.FOR_MEDIA,
                    mBluetoothA2dpEnabled ? AudioSystem.FORCE_NONE : AudioSystem.FORCE_NO_BT_A2DP,
                    null, 0);
        }
    }

    /** @see AudioManager#isBluetoothA2dpOn() */
    public boolean isBluetoothA2dpOn() {
        synchronized (mBluetoothA2dpEnabledLock) {
            return mBluetoothA2dpEnabled;
        }
    }

    /** @see AudioManager#startBluetoothSco() */
    public void startBluetoothSco(IBinder cb, int targetSdkVersion) {
        int scoAudioMode =
                (targetSdkVersion < Build.VERSION_CODES.JELLY_BEAN_MR2) ?
                        SCO_MODE_VIRTUAL_CALL : SCO_MODE_UNDEFINED;
        startBluetoothScoInt(cb, scoAudioMode);
    }

    /** @see AudioManager#startBluetoothScoVirtualCall() */
    public void startBluetoothScoVirtualCall(IBinder cb) {
        startBluetoothScoInt(cb, SCO_MODE_VIRTUAL_CALL);
    }

    void startBluetoothScoInt(IBinder cb, int scoAudioMode){
        if (!checkAudioSettingsPermission("startBluetoothSco()") ||
                !mSystemReady) {
            return;
        }
        ScoClient client = getScoClient(cb, true);
        // The calling identity must be cleared before calling ScoClient.incCount().
        // inCount() calls requestScoState() which in turn can call BluetoothHeadset APIs
        // and this must be done on behalf of system server to make sure permissions are granted.
        // The caller identity must be cleared after getScoClient() because it is needed if a new
        // client is created.
        final long ident = Binder.clearCallingIdentity();
        client.incCount(scoAudioMode);
        Binder.restoreCallingIdentity(ident);
    }

    /** @see AudioManager#stopBluetoothSco() */
    public void stopBluetoothSco(IBinder cb){
        if (!checkAudioSettingsPermission("stopBluetoothSco()") ||
                !mSystemReady) {
            return;
        }
        ScoClient client = getScoClient(cb, false);
        // The calling identity must be cleared before calling ScoClient.decCount().
        // decCount() calls requestScoState() which in turn can call BluetoothHeadset APIs
        // and this must be done on behalf of system server to make sure permissions are granted.
        final long ident = Binder.clearCallingIdentity();
        if (client != null) {
            client.decCount();
        }
        Binder.restoreCallingIdentity(ident);
    }


    private class ScoClient implements IBinder.DeathRecipient {
        private IBinder mCb; // To be notified of client's death
        private int mCreatorPid;
        private int mStartcount; // number of SCO connections started by this client

        ScoClient(IBinder cb) {
            mCb = cb;
            mCreatorPid = Binder.getCallingPid();
            mStartcount = 0;
        }

        public void binderDied() {
            synchronized(mScoClients) {
                Log.w(TAG, "SCO client died");
                int index = mScoClients.indexOf(this);
                if (index < 0) {
                    Log.w(TAG, "unregistered SCO client died");
                } else {
                    clearCount(true);
                    mScoClients.remove(this);
                }
            }
        }

        public void incCount(int scoAudioMode) {
            synchronized(mScoClients) {
                requestScoState(BluetoothHeadset.STATE_AUDIO_CONNECTED, scoAudioMode);
                if (mStartcount == 0) {
                    try {
                        mCb.linkToDeath(this, 0);
                    } catch (RemoteException e) {
                        // client has already died!
                        Log.w(TAG, "ScoClient  incCount() could not link to "+mCb+" binder death");
                    }
                }
                mStartcount++;
            }
        }

        public void decCount() {
            synchronized(mScoClients) {
                if (mStartcount == 0) {
                    Log.w(TAG, "ScoClient.decCount() already 0");
                } else {
                    mStartcount--;
                    if (mStartcount == 0) {
                        try {
                            mCb.unlinkToDeath(this, 0);
                        } catch (NoSuchElementException e) {
                            Log.w(TAG, "decCount() going to 0 but not registered to binder");
                        }
                    }
                    requestScoState(BluetoothHeadset.STATE_AUDIO_DISCONNECTED, 0);
                }
            }
        }

        public void clearCount(boolean stopSco) {
            synchronized(mScoClients) {
                if (mStartcount != 0) {
                    try {
                        mCb.unlinkToDeath(this, 0);
                    } catch (NoSuchElementException e) {
                        Log.w(TAG, "clearCount() mStartcount: "+mStartcount+" != 0 but not registered to binder");
                    }
                }
                mStartcount = 0;
                if (stopSco) {
                    requestScoState(BluetoothHeadset.STATE_AUDIO_DISCONNECTED, 0);
                }
            }
        }

        public int getCount() {
            return mStartcount;
        }

        public IBinder getBinder() {
            return mCb;
        }

        public int getPid() {
            return mCreatorPid;
        }

        public int totalCount() {
            synchronized(mScoClients) {
                int count = 0;
                int size = mScoClients.size();
                for (int i = 0; i < size; i++) {
                    count += mScoClients.get(i).getCount();
                }
                return count;
            }
        }

        private void requestScoState(int state, int scoAudioMode) {
            checkScoAudioState();
            if (totalCount() == 0) {
                if (state == BluetoothHeadset.STATE_AUDIO_CONNECTED) {
                    // Make sure that the state transitions to CONNECTING even if we cannot initiate
                    // the connection.
                    broadcastScoConnectionState(AudioManager.SCO_AUDIO_STATE_CONNECTING);
                    // Accept SCO audio activation only in NORMAL audio mode or if the mode is
                    // currently controlled by the same client process.
                    synchronized(mSetModeDeathHandlers) {
                        if ((mSetModeDeathHandlers.isEmpty() ||
                                mSetModeDeathHandlers.get(0).getPid() == mCreatorPid) &&
                                (mScoAudioState == SCO_STATE_INACTIVE ||
                                 mScoAudioState == SCO_STATE_DEACTIVATE_REQ)) {
                            if (mScoAudioState == SCO_STATE_INACTIVE) {
                                mScoAudioMode = scoAudioMode;
                                if (scoAudioMode == SCO_MODE_UNDEFINED) {
                                    if (mBluetoothHeadsetDevice != null) {
                                        mScoAudioMode = new Integer(Settings.Global.getInt(
                                                                mContentResolver,
                                                                "bluetooth_sco_channel_"+
                                                                mBluetoothHeadsetDevice.getAddress(),
                                                                SCO_MODE_VIRTUAL_CALL));
                                        if (mScoAudioMode > SCO_MODE_MAX || mScoAudioMode < 0) {
                                            mScoAudioMode = SCO_MODE_VIRTUAL_CALL;
                                        }
                                    } else {
                                        mScoAudioMode = SCO_MODE_RAW;
                                    }
                                }
                                if (mBluetoothHeadset != null && mBluetoothHeadsetDevice != null) {
                                    boolean status = false;
                                    if (mScoAudioMode == SCO_MODE_RAW) {
                                        status = mBluetoothHeadset.connectAudio();
                                    } else if (mScoAudioMode == SCO_MODE_VIRTUAL_CALL) {
                                        status = mBluetoothHeadset.startScoUsingVirtualVoiceCall(
                                                                            mBluetoothHeadsetDevice);
                                    } else if (mScoAudioMode == SCO_MODE_VR) {
                                        status = mBluetoothHeadset.startVoiceRecognition(
                                                                           mBluetoothHeadsetDevice);
                                    }

                                    if (status) {
                                        mScoAudioState = SCO_STATE_ACTIVE_INTERNAL;
                                    } else {
                                        broadcastScoConnectionState(
                                                AudioManager.SCO_AUDIO_STATE_DISCONNECTED);
                                    }
                                } else if (getBluetoothHeadset()) {
                                    mScoAudioState = SCO_STATE_ACTIVATE_REQ;
                                }
                            } else {
                                mScoAudioState = SCO_STATE_ACTIVE_INTERNAL;
                                broadcastScoConnectionState(AudioManager.SCO_AUDIO_STATE_CONNECTED);
                            }
                        } else {
                            broadcastScoConnectionState(AudioManager.SCO_AUDIO_STATE_DISCONNECTED);
                        }
                    }
                } else if (state == BluetoothHeadset.STATE_AUDIO_DISCONNECTED &&
                              (mScoAudioState == SCO_STATE_ACTIVE_INTERNAL ||
                               mScoAudioState == SCO_STATE_ACTIVATE_REQ)) {
                    if (mScoAudioState == SCO_STATE_ACTIVE_INTERNAL) {
                        if (mBluetoothHeadset != null && mBluetoothHeadsetDevice != null) {
                            boolean status = false;
                            if (mScoAudioMode == SCO_MODE_RAW) {
                                status = mBluetoothHeadset.disconnectAudio();
                            } else if (mScoAudioMode == SCO_MODE_VIRTUAL_CALL) {
                                status = mBluetoothHeadset.stopScoUsingVirtualVoiceCall(
                                                                        mBluetoothHeadsetDevice);
                            } else if (mScoAudioMode == SCO_MODE_VR) {
                                        status = mBluetoothHeadset.stopVoiceRecognition(
                                                                      mBluetoothHeadsetDevice);
                            }

                            if (!status) {
                                mScoAudioState = SCO_STATE_INACTIVE;
                                broadcastScoConnectionState(
                                        AudioManager.SCO_AUDIO_STATE_DISCONNECTED);
                            }
                        } else if (getBluetoothHeadset()) {
                            mScoAudioState = SCO_STATE_DEACTIVATE_REQ;
                        }
                    } else {
                        mScoAudioState = SCO_STATE_INACTIVE;
                        broadcastScoConnectionState(AudioManager.SCO_AUDIO_STATE_DISCONNECTED);
                    }
                }
            }
        }
    }

    private void checkScoAudioState() {
        if (mBluetoothHeadset != null && mBluetoothHeadsetDevice != null &&
                mScoAudioState == SCO_STATE_INACTIVE &&
                mBluetoothHeadset.getAudioState(mBluetoothHeadsetDevice)
                != BluetoothHeadset.STATE_AUDIO_DISCONNECTED) {
            mScoAudioState = SCO_STATE_ACTIVE_EXTERNAL;
        }
    }

    private ScoClient getScoClient(IBinder cb, boolean create) {
        synchronized(mScoClients) {
            ScoClient client = null;
            int size = mScoClients.size();
            for (int i = 0; i < size; i++) {
                client = mScoClients.get(i);
                if (client.getBinder() == cb)
                    return client;
            }
            if (create) {
                client = new ScoClient(cb);
                mScoClients.add(client);
            }
            return client;
        }
    }

    public void clearAllScoClients(int exceptPid, boolean stopSco) {
        synchronized(mScoClients) {
            ScoClient savedClient = null;
            int size = mScoClients.size();
            for (int i = 0; i < size; i++) {
                ScoClient cl = mScoClients.get(i);
                if (cl.getPid() != exceptPid) {
                    cl.clearCount(stopSco);
                } else {
                    savedClient = cl;
                }
            }
            mScoClients.clear();
            if (savedClient != null) {
                mScoClients.add(savedClient);
            }
        }
    }

    private boolean getBluetoothHeadset() {
        boolean result = false;
        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
        if (adapter != null) {
            result = adapter.getProfileProxy(mContext, mBluetoothProfileServiceListener,
                                    BluetoothProfile.HEADSET);
        }
        // If we could not get a bluetooth headset proxy, send a failure message
        // without delay to reset the SCO audio state and clear SCO clients.
        // If we could get a proxy, send a delayed failure message that will reset our state
        // in case we don't receive onServiceConnected().
        sendMsg(mAudioHandler, MSG_BT_HEADSET_CNCT_FAILED,
                SENDMSG_REPLACE, 0, 0, null, result ? BT_HEADSET_CNCT_TIMEOUT_MS : 0);
        return result;
    }

    private void disconnectBluetoothSco(int exceptPid) {
        synchronized(mScoClients) {
            checkScoAudioState();
            if (mScoAudioState == SCO_STATE_ACTIVE_EXTERNAL ||
                    mScoAudioState == SCO_STATE_DEACTIVATE_EXT_REQ) {
                if (mBluetoothHeadsetDevice != null) {
                    if (mBluetoothHeadset != null) {
                        if (!mBluetoothHeadset.stopVoiceRecognition(
                                mBluetoothHeadsetDevice)) {
                            sendMsg(mAudioHandler, MSG_BT_HEADSET_CNCT_FAILED,
                                    SENDMSG_REPLACE, 0, 0, null, 0);
                        }
                    } else if (mScoAudioState == SCO_STATE_ACTIVE_EXTERNAL &&
                            getBluetoothHeadset()) {
                        mScoAudioState = SCO_STATE_DEACTIVATE_EXT_REQ;
                    }
                }
            } else {
                clearAllScoClients(exceptPid, true);
            }
        }
    }

    private void resetBluetoothSco() {
        synchronized(mScoClients) {
            clearAllScoClients(0, false);
            mScoAudioState = SCO_STATE_INACTIVE;
            broadcastScoConnectionState(AudioManager.SCO_AUDIO_STATE_DISCONNECTED);
        }
        AudioSystem.setParameters("A2dpSuspended=false");
        setBluetoothScoOnInt(false);
    }

    private void broadcastScoConnectionState(int state) {
        sendMsg(mAudioHandler, MSG_BROADCAST_BT_CONNECTION_STATE,
                SENDMSG_QUEUE, state, 0, null, 0);
    }

    private void onBroadcastScoConnectionState(int state) {
        if (state != mScoConnectionState) {
            Intent newIntent = new Intent(AudioManager.ACTION_SCO_AUDIO_STATE_UPDATED);
            newIntent.putExtra(AudioManager.EXTRA_SCO_AUDIO_STATE, state);
            newIntent.putExtra(AudioManager.EXTRA_SCO_AUDIO_PREVIOUS_STATE,
                    mScoConnectionState);
            sendStickyBroadcastToAll(newIntent);
            mScoConnectionState = state;
        }
    }

    void setBtScoDeviceConnectionState(BluetoothDevice btDevice, int state) {
        if (btDevice == null) {
            return;
        }

        String address = btDevice.getAddress();
        BluetoothClass btClass = btDevice.getBluetoothClass();
        int outDevice = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO;
        int inDevice = AudioSystem.DEVICE_IN_BLUETOOTH_SCO_HEADSET;
        if (btClass != null) {
            switch (btClass.getDeviceClass()) {
            case BluetoothClass.Device.AUDIO_VIDEO_WEARABLE_HEADSET:
            case BluetoothClass.Device.AUDIO_VIDEO_HANDSFREE:
                outDevice = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO_HEADSET;
                break;
            case BluetoothClass.Device.AUDIO_VIDEO_CAR_AUDIO:
                outDevice = AudioSystem.DEVICE_OUT_BLUETOOTH_SCO_CARKIT;
                break;
            }
        }

        if (!BluetoothAdapter.checkBluetoothAddress(address)) {
            address = "";
        }

        boolean connected = (state == BluetoothProfile.STATE_CONNECTED);

        String btDeviceName =  btDevice.getName();
        boolean success =
            handleDeviceConnection(connected, outDevice, address, btDeviceName) &&
            handleDeviceConnection(connected, inDevice, address, btDeviceName);
        if (success) {
            synchronized (mScoClients) {
                if (connected) {
                    mBluetoothHeadsetDevice = btDevice;
                } else {
                    mBluetoothHeadsetDevice = null;
                    resetBluetoothSco();
                }
            }
        }
    }

    private BluetoothProfile.ServiceListener mBluetoothProfileServiceListener =
        new BluetoothProfile.ServiceListener() {
        public void onServiceConnected(int profile, BluetoothProfile proxy) {
            BluetoothDevice btDevice;
            List<BluetoothDevice> deviceList;
            switch(profile) {
            case BluetoothProfile.A2DP:
                synchronized (mConnectedDevices) {
                    synchronized (mA2dpAvrcpLock) {
                        mA2dp = (BluetoothA2dp) proxy;
                        deviceList = mA2dp.getConnectedDevices();
                        if (deviceList.size() > 0) {
                            btDevice = deviceList.get(0);
                            int state = mA2dp.getConnectionState(btDevice);
                            int delay = checkSendBecomingNoisyIntent(
                                                AudioSystem.DEVICE_OUT_BLUETOOTH_A2DP,
                                                (state == BluetoothA2dp.STATE_CONNECTED) ? 1 : 0);
                            queueMsgUnderWakeLock(mAudioHandler,
                                    MSG_SET_A2DP_SINK_CONNECTION_STATE,
                                    state,
                                    0,
                                    btDevice,
                                    delay);
                        }
                    }
                }
                break;

            case BluetoothProfile.A2DP_SINK:
                deviceList = proxy.getConnectedDevices();
                if (deviceList.size() > 0) {
                    btDevice = deviceList.get(0);
                    synchronized (mConnectedDevices) {