/src/com/android/server/telecom/CallsManager.java

/*
 * Copyright (C) 2013 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.telecom;

import android.content.Context;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.SystemProperties;
import android.os.Trace;
import android.provider.CallLog.Calls;
import android.provider.Settings;
import android.telecom.CallAudioState;
import android.telecom.Conference;
import android.telecom.Connection;
import android.telecom.DisconnectCause;
import android.telecom.GatewayInfo;
import android.telecom.ParcelableConference;
import android.telecom.ParcelableConnection;
import android.telecom.PhoneAccount;
import android.telecom.PhoneAccountHandle;
import android.telecom.TelecomManager;
import android.telecom.VideoProfile;
import android.telephony.PhoneNumberUtils;
import android.telephony.TelephonyManager;
import android.text.TextUtils;

import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.telephony.PhoneConstants;
import com.android.internal.telephony.TelephonyProperties;
import com.android.internal.util.IndentingPrintWriter;
import com.android.server.telecom.ui.ViceNotificationImpl;

import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Singleton.
 *
 * NOTE: by design most APIs are package private, use the relevant adapter/s to allow
 * access from other packages specifically refraining from passing the CallsManager instance
 * beyond the com.android.server.telecom package boundary.
 */
@VisibleForTesting
public class CallsManager extends Call.ListenerBase implements VideoProviderProxy.Listener {

    // TODO: Consider renaming this CallsManagerPlugin.
    interface CallsManagerListener {
        void onCallAdded(Call call);
        void onCallRemoved(Call call);
        void onCallStateChanged(Call call, int oldState, int newState);
        void onConnectionServiceChanged(
                Call call,
                ConnectionServiceWrapper oldService,
                ConnectionServiceWrapper newService);
        void onIncomingCallAnswered(Call call);
        void onIncomingCallRejected(Call call, boolean rejectWithMessage, String textMessage);
        void onForegroundCallChanged(Call oldForegroundCall, Call newForegroundCall);
        void onCallAudioStateChanged(CallAudioState oldAudioState, CallAudioState newAudioState);
        void onRingbackRequested(Call call, boolean ringback);
        void onIsConferencedChanged(Call call);
        void onIsVoipAudioModeChanged(Call call);
        void onVideoStateChanged(Call call);
        void onCanAddCallChanged(boolean canAddCall);
        void onSessionModifyRequestReceived(Call call, VideoProfile videoProfile);
        void onMergeFailed(Call call);
    }

    private static final String TAG = "CallsManager";

    private static final int MAXIMUM_LIVE_CALLS = 1;
    private static final int MAXIMUM_HOLD_CALLS = 1;
    private static final int MAXIMUM_RINGING_CALLS = 1;
    private static final int MAXIMUM_DIALING_CALLS = 1;
    private static final int MAXIMUM_OUTGOING_CALLS = 1;
    private static final int MAXIMUM_TOP_LEVEL_CALLS = 2;
    private static final int MAXIMUM_DSDA_LIVE_CALLS = 2;
    private static final int MAXIMUM_DSDA_HOLD_CALLS = 2;
    private static final int MAXIMUM_DSDA_TOP_LEVEL_CALLS = 4;

    private static final int[] OUTGOING_CALL_STATES =
            {CallState.CONNECTING, CallState.SELECT_PHONE_ACCOUNT, CallState.DIALING};

    private static final int[] LIVE_CALL_STATES =
            {CallState.CONNECTING, CallState.SELECT_PHONE_ACCOUNT, CallState.DIALING,
            CallState.ACTIVE};

    /**
     * The main call repository. Keeps an instance of all live calls. New incoming and outgoing
     * calls are added to the map and removed when the calls move to the disconnected state.
     *
     * ConcurrentHashMap constructor params: 8 is initial table size, 0.9f is
     * load factor before resizing, 1 means we only expect a single thread to
     * access the map so make only a single shard
     */
    private final Set<Call> mCalls = Collections.newSetFromMap(
            new ConcurrentHashMap<Call, Boolean>(8, 0.9f, 1));

    private final ConnectionServiceRepository mConnectionServiceRepository;
    private final DtmfLocalTonePlayer mDtmfLocalTonePlayer;
    private final InCallController mInCallController;
    private final CallAudioManager mCallAudioManager;
    private RespondViaSmsManager mRespondViaSmsManager;
    private final Ringer mRinger;
    private final InCallWakeLockController mInCallWakeLockController;
    // For this set initial table size to 16 because we add 13 listeners in
    // the CallsManager constructor.
    private final Set<CallsManagerListener> mListeners = Collections.newSetFromMap(
            new ConcurrentHashMap<CallsManagerListener, Boolean>(16, 0.9f, 1));
    private final HeadsetMediaButton mHeadsetMediaButton;
    private final WiredHeadsetManager mWiredHeadsetManager;
    private final DockManager mDockManager;
    private final TtyManager mTtyManager;
    private final ProximitySensorManager mProximitySensorManager;
    private final PhoneStateBroadcaster mPhoneStateBroadcaster;
    private final CallLogManager mCallLogManager;
    private final Context mContext;
    private final TelecomSystem.SyncRoot mLock;
    private final ContactsAsyncHelper mContactsAsyncHelper;
    private final CallerInfoAsyncQueryFactory mCallerInfoAsyncQueryFactory;
    private final PhoneAccountRegistrar mPhoneAccountRegistrar;
    private final MissedCallNotifier mMissedCallNotifier;
    private final ViceNotificationImpl mViceNotificationImpl;
    private final Set<Call> mLocallyDisconnectingCalls = new HashSet<>();
    private final Set<Call> mPendingCallsToDisconnect = new HashSet<>();
    /* Handler tied to thread in which CallManager was initialized. */
    private final Handler mHandler = new Handler(Looper.getMainLooper());

    private boolean mCanAddCall = true;

    /**
     * The call the user is currently interacting with. This is the call that should have audio
     * focus and be visible in the in-call UI.
     */
    private Call mForegroundCall;

    private static final int LCH_PLAY_DTMF = 100;
    private static final int LCH_STOP_DTMF = 101;
    private static final int PHONE_START_DSDA_INCALL_TONE = 102;
    private static final int LCH_DTMF_PERIODICITY = 3000;
    private static final int LCH_DTMF_PERIOD = 500;
    private static final String sSupervisoryCallHoldToneConfig =
            SystemProperties.get("persist.radio.sch_tone", "none");

    private static InCallTonePlayer.Factory mPlayerFactory;
    private String mLchSub = null;

    private InCallTonePlayer mLocalCallReminderTonePlayer = null;
    private String mSubInConversation = null;

    private Runnable mStopTone;

    /**
     * Initializes the required Telecom components.
     */
    CallsManager(
            Context context,
            TelecomSystem.SyncRoot lock,
            ContactsAsyncHelper contactsAsyncHelper,
            CallerInfoAsyncQueryFactory callerInfoAsyncQueryFactory,
            MissedCallNotifier missedCallNotifier,
            PhoneAccountRegistrar phoneAccountRegistrar,
            HeadsetMediaButtonFactory headsetMediaButtonFactory,
            ProximitySensorManagerFactory proximitySensorManagerFactory,
            InCallWakeLockControllerFactory inCallWakeLockControllerFactory,
            ViceNotifier viceNotifier) {
        mContext = context;
        mLock = lock;
        mContactsAsyncHelper = contactsAsyncHelper;
        mCallerInfoAsyncQueryFactory = callerInfoAsyncQueryFactory;
        mPhoneAccountRegistrar = phoneAccountRegistrar;
        mMissedCallNotifier = missedCallNotifier;
        StatusBarNotifier statusBarNotifier = new StatusBarNotifier(context, this);
        mWiredHeadsetManager = new WiredHeadsetManager(context);
        mDockManager = new DockManager(context);
        mCallAudioManager = new CallAudioManager(
                context, mLock, statusBarNotifier, mWiredHeadsetManager, mDockManager, this);
        InCallTonePlayer.Factory playerFactory = new InCallTonePlayer.Factory(mCallAudioManager, lock);
        mPlayerFactory = playerFactory;
        mRinger = new Ringer(mCallAudioManager, this, playerFactory, context);
        mHeadsetMediaButton = headsetMediaButtonFactory.create(context, this, mLock);
        mTtyManager = new TtyManager(context, mWiredHeadsetManager);
        mProximitySensorManager = proximitySensorManagerFactory.create(context, this);
        mPhoneStateBroadcaster = new PhoneStateBroadcaster(this);
        mCallLogManager = new CallLogManager(context);
        mInCallController = new InCallController(context, mLock, this);
        mDtmfLocalTonePlayer = new DtmfLocalTonePlayer(context);
        mConnectionServiceRepository =
                new ConnectionServiceRepository(mPhoneAccountRegistrar, mContext, mLock, this);
        mInCallWakeLockController = inCallWakeLockControllerFactory.create(context, this);
        mViceNotificationImpl = viceNotifier.create(mContext, this);

        mListeners.add(statusBarNotifier);
        mListeners.add(mCallLogManager);
        mListeners.add(mPhoneStateBroadcaster);
        mListeners.add(mInCallController);
        mListeners.add(mRinger);
        mListeners.add(new RingbackPlayer(this, playerFactory));
        mListeners.add(new InCallToneMonitor(playerFactory, this));
        mListeners.add(mCallAudioManager);
        mListeners.add(missedCallNotifier);
        mListeners.add(mDtmfLocalTonePlayer);
        mListeners.add(mHeadsetMediaButton);
        mListeners.add(mProximitySensorManager);
        mListeners.add(mViceNotificationImpl);

        mMissedCallNotifier.updateOnStartup(
                mLock, this, mContactsAsyncHelper, mCallerInfoAsyncQueryFactory);
    }

    ViceNotificationImpl getViceNotificationImpl() {
        return mViceNotificationImpl;
    }

    public void setRespondViaSmsManager(RespondViaSmsManager respondViaSmsManager) {
        if (mRespondViaSmsManager != null) {
            mListeners.remove(mRespondViaSmsManager);
        }
        mRespondViaSmsManager = respondViaSmsManager;
        mListeners.add(respondViaSmsManager);
    }

    public RespondViaSmsManager getRespondViaSmsManager() {
        return mRespondViaSmsManager;
    }

    @Override
    public void onSuccessfulOutgoingCall(Call call, int callState) {
        Log.v(this, "onSuccessfulOutgoingCall, %s", call);

        setCallState(call, callState, "successful outgoing call");
        if (!mCalls.contains(call)) {
            // Call was not added previously in startOutgoingCall due to it being a potential MMI
            // code, so add it now.
            addCall(call);
        }

        // The call's ConnectionService has been updated.
        for (CallsManagerListener listener : mListeners) {
            listener.onConnectionServiceChanged(call, null, call.getConnectionService());
        }

        markCallAsDialing(call);
    }

    @Override
    public void onFailedOutgoingCall(Call call, DisconnectCause disconnectCause) {
        Log.v(this, "onFailedOutgoingCall, call: %s", call);

        markCallAsRemoved(call);
    }

    @Override
    public void onSuccessfulIncomingCall(Call incomingCall) {
        Log.d(this, "onSuccessfulIncomingCall");
        setCallState(incomingCall, CallState.RINGING, "successful incoming call");

        if (hasMaximumRingingCalls(incomingCall.getTargetPhoneAccount().getId()) || hasMaximumDialingCalls() ) {
            incomingCall.reject(false, null);
            // since the call was not added to the list of calls, we have to call the missed
            // call notifier and the call logger manually.
            mMissedCallNotifier.showMissedCallNotification(incomingCall);
            mCallLogManager.logCall(incomingCall, Calls.MISSED_TYPE);
        } else {
            if (TelephonyManager.getDefault().getMultiSimConfiguration()
                == TelephonyManager.MultiSimVariants.DSDA) {
                incomingCall.mIsActiveSub = true;
            }
            addCall(incomingCall);
            setActiveSubscription(incomingCall.getTargetPhoneAccount().getId());
        }
    }

    @Override
    public void onFailedIncomingCall(Call call) {
        setCallState(call, CallState.DISCONNECTED, "failed incoming call");
        call.removeListener(this);
    }

    @Override
    public void onSuccessfulUnknownCall(Call call, int callState) {
        setCallState(call, callState, "successful unknown call");
        Log.i(this, "onSuccessfulUnknownCall for call %s", call);
        addCall(call);
    }

    @Override
    public void onFailedUnknownCall(Call call) {
        Log.i(this, "onFailedUnknownCall for call %s", call);
        setCallState(call, CallState.DISCONNECTED, "failed unknown call");
        call.removeListener(this);
    }

    @Override
    public void onRingbackRequested(Call call, boolean ringback) {
        for (CallsManagerListener listener : mListeners) {
            listener.onRingbackRequested(call, ringback);
        }
    }

    @Override
    public void onPostDialWait(Call call, String remaining) {
        mInCallController.onPostDialWait(call, remaining);
    }

    @Override
    public void onPostDialChar(final Call call, char nextChar) {
        if (PhoneNumberUtils.is12Key(nextChar)) {
            // Play tone if it is one of the dialpad digits, canceling out the previously queued
            // up stopTone runnable since playing a new tone automatically stops the previous tone.
            if (mStopTone != null) {
                mHandler.removeCallbacks(mStopTone);
            }

            mDtmfLocalTonePlayer.playTone(call, nextChar);

            // TODO: Create a LockedRunnable class that does the synchronization automatically.
            mStopTone = new Runnable() {
                @Override
                public void run() {
                    synchronized (mLock) {
                        // Set a timeout to stop the tone in case there isn't another tone to follow.
                        mDtmfLocalTonePlayer.stopTone(call);
                    }
                }
            };
            mHandler.postDelayed(
                    mStopTone,
                    Timeouts.getDelayBetweenDtmfTonesMillis(mContext.getContentResolver()));
        } else if (nextChar == 0 || nextChar == TelecomManager.DTMF_CHARACTER_WAIT ||
                nextChar == TelecomManager.DTMF_CHARACTER_PAUSE) {
            // Stop the tone if a tone is playing, removing any other stopTone callbacks since
            // the previous tone is being stopped anyway.
            if (mStopTone != null) {
                mHandler.removeCallbacks(mStopTone);
            }
            mDtmfLocalTonePlayer.stopTone(call);
        } else {
            Log.w(this, "onPostDialChar: invalid value %d", nextChar);
        }
    }

    @Override
    public void onParentChanged(Call call) {
        // parent-child relationship affects which call should be foreground, so do an update.
        updateCallsManagerState();
        for (CallsManagerListener listener : mListeners) {
            listener.onIsConferencedChanged(call);
        }
    }

    @Override
    public void onChildrenChanged(Call call) {
        // parent-child relationship affects which call should be foreground, so do an update.
        updateCallsManagerState();
        for (CallsManagerListener listener : mListeners) {
            listener.onIsConferencedChanged(call);
        }
    }

    @Override
    public void onIsVoipAudioModeChanged(Call call) {
        for (CallsManagerListener listener : mListeners) {
            listener.onIsVoipAudioModeChanged(call);
        }
    }

    @Override
    public void onVideoStateChanged(Call call) {
        for (CallsManagerListener listener : mListeners) {
            listener.onVideoStateChanged(call);
        }
    }

    @Override
    public boolean onCanceledViaNewOutgoingCallBroadcast(final Call call) {
        mPendingCallsToDisconnect.add(call);
        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                synchronized (mLock) {
                    if (mPendingCallsToDisconnect.remove(call)) {
                        Log.i(this, "Delayed disconnection of call: %s", call);
                        call.disconnect();
                    }
                }
            }
        }, Timeouts.getNewOutgoingCallCancelMillis(mContext.getContentResolver()));

        return true;
    }

    /**
     * Handles changes to the {@link Connection.VideoProvider} for a call.  Adds the
     * {@link CallsManager} as a listener for the {@link VideoProviderProxy} which is created
     * in {@link Call#setVideoProvider(IVideoProvider)}.  This allows the {@link CallsManager} to
     * respond to callbacks from the {@link VideoProviderProxy}.
     *
     * @param call The call.
     */
    @Override
    public void onVideoCallProviderChanged(Call call) {
        VideoProviderProxy videoProviderProxy = call.getVideoProviderProxy();

        if (videoProviderProxy == null) {
            return;
        }

        videoProviderProxy.addListener(this);
    }

    /**
     * Handles session modification requests received via the {@link TelecomVideoCallCallback} for
     * a call.  Notifies listeners of the {@link CallsManager.CallsManagerListener} of the session
     * modification request.
     *
     * @param call The call.
     * @param videoProfile The {@link VideoProfile}.
     */
    @Override
    public void onSessionModifyRequestReceived(Call call, VideoProfile videoProfile) {
        int videoState = videoProfile != null ? videoProfile.getVideoState() :
                VideoProfile.STATE_AUDIO_ONLY;
        Log.v(TAG, "onSessionModifyRequestReceived : videoProfile = " + VideoProfile
                .videoStateToString(videoState));

        for (CallsManagerListener listener : mListeners) {
            listener.onSessionModifyRequestReceived(call, videoProfile);
        }
    }

    Collection<Call> getCalls() {
        return Collections.unmodifiableCollection(mCalls);
    }

    Call getForegroundCall() {
        return mForegroundCall;
    }

    Ringer getRinger() {
        return mRinger;
    }

    InCallController getInCallController() {
        return mInCallController;
    }

    boolean hasEmergencyCall() {
        for (Call call : mCalls) {
            if (call.isEmergencyCall()) {
                return true;
            }
        }
        return false;
    }

    boolean hasOnlyDisconnectedCalls() {
        for (Call call : mCalls) {
            if (!call.isDisconnected()) {
                return false;
            }
        }
        return true;
    }

    boolean hasVideoCall() {
        for (Call call : mCalls) {
            if (VideoProfile.isVideo(call.getVideoState())) {
                return true;
            }
        }
        return false;
    }

    CallAudioState getAudioState() {
        return mCallAudioManager.getCallAudioState();
    }

    boolean isTtySupported() {
        return mTtyManager.isTtySupported();
    }

    int getCurrentTtyMode() {
        return mTtyManager.getCurrentTtyMode();
    }

    void addListener(CallsManagerListener listener) {
        mListeners.add(listener);
    }

    void removeListener(CallsManagerListener listener) {
        mListeners.remove(listener);
    }

    /**
     * Starts the process to attach the call to a connection service.
     *
     * @param phoneAccountHandle The phone account which contains the component name of the
     *        connection service to use for this call.
     * @param extras The optional extras Bundle passed with the intent used for the incoming call.
     */
    void processIncomingCallIntent(PhoneAccountHandle phoneAccountHandle, Bundle extras) {
        Log.d(this, "processIncomingCallIntent");
        Uri handle = extras.getParcelable(TelecomManager.EXTRA_INCOMING_CALL_ADDRESS);
        if (handle == null) {
            // Required for backwards compatibility
            handle = extras.getParcelable(TelephonyManager.EXTRA_INCOMING_NUMBER);
        }
        Call call = new Call(
                mContext,
                this,
                mLock,
                mConnectionServiceRepository,
                mContactsAsyncHelper,
                mCallerInfoAsyncQueryFactory,
                handle,
                null /* gatewayInfo */,
                null /* connectionManagerPhoneAccount */,
                phoneAccountHandle,
                true /* isIncoming */,
                false /* isConference */);

        call.setIntentExtras(extras);
        // TODO: Move this to be a part of addCall()
        call.addListener(this);
        call.startCreateConnection(mPhoneAccountRegistrar);
    }

    void addNewUnknownCall(PhoneAccountHandle phoneAccountHandle, Bundle extras) {
        Uri handle = extras.getParcelable(TelecomManager.EXTRA_UNKNOWN_CALL_HANDLE);
        Log.i(this, "addNewUnknownCall with handle: %s", Log.pii(handle));
        Call call = new Call(
                mContext,
                this,
                mLock,
                mConnectionServiceRepository,
                mContactsAsyncHelper,
                mCallerInfoAsyncQueryFactory,
                handle,
                null /* gatewayInfo */,
                null /* connectionManagerPhoneAccount */,
                phoneAccountHandle,
                // Use onCreateIncomingConnection in TelephonyConnectionService, so that we attach
                // to the existing connection instead of trying to create a new one.
                true /* isIncoming */,
                false /* isConference */);
        call.setIsUnknown(true);
        call.setIntentExtras(extras);
        call.addListener(this);
        call.startCreateConnection(mPhoneAccountRegistrar);
    }

    private boolean areHandlesEqual(Uri handle1, Uri handle2) {
        if (handle1 == null || handle2 == null) {
            return handle1 == handle2;
        }

        if (!TextUtils.equals(handle1.getScheme(), handle2.getScheme())) {
            return false;
        }

        final String number1 = PhoneNumberUtils.normalizeNumber(handle1.getSchemeSpecificPart());
        final String number2 = PhoneNumberUtils.normalizeNumber(handle2.getSchemeSpecificPart());
        return TextUtils.equals(number1, number2);
    }

    private Call getNewOutgoingCall(Uri handle) {
        // First check to see if we can reuse any of the calls that are waiting to disconnect.
        // See {@link Call#abort} and {@link #onCanceledViaNewOutgoingCall} for more information.
        Call reusedCall = null;
        for (Call pendingCall : mPendingCallsToDisconnect) {
            if (reusedCall == null && areHandlesEqual(pendingCall.getHandle(), handle)) {
                mPendingCallsToDisconnect.remove(pendingCall);
                Log.i(this, "Reusing disconnected call %s", pendingCall);
                reusedCall = pendingCall;
            } else {
                Log.i(this, "Not reusing disconnected call %s", pendingCall);
                pendingCall.disconnect();
            }
        }
        if (reusedCall != null) {
            return reusedCall;
        }

        // Create a call with original handle. The handle may be changed when the call is attached
        // to a connection service, but in most cases will remain the same.
        return new Call(
                mContext,
                this,
                mLock,
                mConnectionServiceRepository,
                mContactsAsyncHelper,
                mCallerInfoAsyncQueryFactory,
                handle,
                null /* gatewayInfo */,
                null /* connectionManagerPhoneAccount */,
                null /* phoneAccountHandle */,
                false /* isIncoming */,
                false /* isConference */);
    }

    /**
     * Kicks off the first steps to creating an outgoing call so that InCallUI can launch.
     *
     * @param handle Handle to connect the call with.
     * @param phoneAccountHandle The phone account which contains the component name of the
     *        connection service to use for this call.
     * @param extras The optional extras Bundle passed with the intent used for the incoming call.
     */
    Call startOutgoingCall(Uri handle, PhoneAccountHandle phoneAccountHandle, Bundle extras) {
        Call call = getNewOutgoingCall(handle);

        if (extras!=null) {
            call.setVideoState(extras.getInt(TelecomManager.EXTRA_START_CALL_WITH_VIDEO_STATE,
                    VideoProfile.STATE_AUDIO_ONLY));
        }

        boolean isAddParticipant = ((extras != null) && (extras.getBoolean(
                TelephonyProperties.ADD_PARTICIPANT_KEY, false)));
        boolean isSkipSchemaOrConfUri = ((extras != null) && (extras.getBoolean(
                TelephonyProperties.EXTRA_SKIP_SCHEMA_PARSING, false) ||
                extras.getBoolean(TelephonyProperties.EXTRA_DIAL_CONFERENCE_URI, false)));

        if (isAddParticipant) {
            String number = handle.getSchemeSpecificPart();
            if (!isSkipSchemaOrConfUri) {
                number = PhoneNumberUtils.stripSeparators(number);
            }
            addParticipant(number);
            mInCallController.bringToForeground(false);
            return null;
        }

        // Force tel scheme for ims conf uri/skip schema calls to avoid selection of sip accounts
        String scheme = (isSkipSchemaOrConfUri? PhoneAccount.SCHEME_TEL: handle.getScheme());

        Log.d(this, "startOutgoingCall :: isAddParticipant=" + isAddParticipant
                + " isSkipSchemaOrConfUri=" + isSkipSchemaOrConfUri + " scheme=" + scheme);

        List<PhoneAccountHandle> accounts =
                mPhoneAccountRegistrar.getCallCapablePhoneAccounts(scheme, false);

        Log.v(this, "startOutgoingCall found accounts = " + accounts);

        if (mForegroundCall != null && TelephonyManager.getDefault().getMultiSimConfiguration()
                != TelephonyManager.MultiSimVariants.DSDA) {
            Call ongoingCall = mForegroundCall;
            // If there is an ongoing call, use the same phone account to place this new call.
            // If the ongoing call is a conference call, we fetch the phone account from the
            // child calls because we don't have targetPhoneAccount set on Conference calls.
            // TODO: Set targetPhoneAccount for all conference calls (b/23035408).
            if (ongoingCall.getTargetPhoneAccount() == null &&
                    !ongoingCall.getChildCalls().isEmpty()) {
                ongoingCall = ongoingCall.getChildCalls().get(0);
            }
            if (ongoingCall.getTargetPhoneAccount() != null) {
                phoneAccountHandle = ongoingCall.getTargetPhoneAccount();
            }
        }

        // Only dial with the requested phoneAccount if it is still valid. Otherwise treat this call
        // as if a phoneAccount was not specified (does the default behavior instead).
        // Note: We will not attempt to dial with a requested phoneAccount if it is disabled.
        if (phoneAccountHandle != null) {
            if (!accounts.contains(phoneAccountHandle)) {
                phoneAccountHandle = null;
            }
        }

        if (phoneAccountHandle == null) {
            // No preset account, check if default exists that supports the URI scheme for the
            // handle.
            phoneAccountHandle =
                    mPhoneAccountRegistrar.getOutgoingPhoneAccountForScheme(scheme);
        }

        call.setTargetPhoneAccount(phoneAccountHandle);

        boolean isPotentialInCallMMICode = isPotentialInCallMMICode(handle);

        // Do not support any more live calls.  Our options are to move a call to hold, disconnect
        // a call, or cancel this call altogether.
        if (!isPotentialInCallMMICode && !makeRoomForOutgoingCall(call, call.isEmergencyCall())) {
            // just cancel at this point.
            Log.i(this, "No remaining room for outgoing call: %s", call);
            if (mCalls.contains(call)) {
                // This call can already exist if it is a reused call,
                // See {@link #getNewOutgoingCall}.
                call.disconnect();
            }
            return null;
        }

        boolean needsAccountSelection = phoneAccountHandle == null && accounts.size() > 1 &&
                !call.isEmergencyCall();

        if (needsAccountSelection) {
            // This is the state where the user is expected to select an account
            call.setState(CallState.SELECT_PHONE_ACCOUNT, "needs account selection");
            // Create our own instance to modify (since extras may be Bundle.EMPTY)
            extras = new Bundle(extras);
            extras.putParcelableList(android.telecom.Call.AVAILABLE_PHONE_ACCOUNTS, accounts);
        } else {
            call.setState(
                    CallState.CONNECTING,
                    phoneAccountHandle == null ? "no-handle" : phoneAccountHandle.toString());
        }

        call.setIntentExtras(extras);

        // Do not add the call if it is a potential MMI code.
        if ((isPotentialMMICode(handle) || isPotentialInCallMMICode) && !needsAccountSelection) {
            call.addListener(this);
        } else if (!mCalls.contains(call)) {
            // We check if mCalls already contains the call because we could potentially be reusing
            // a call which was previously added (See {@link #getNewOutgoingCall}).
            addCall(call);
        }

        return call;
    }

    /**
     * Attempts to issue/connect the specified call.
     *
     * @param handle Handle to connect the call with.
     * @param gatewayInfo Optional gateway information that can be used to route the call to the
     *        actual dialed handle via a gateway provider. May be null.
     * @param speakerphoneOn Whether or not to turn the speakerphone on once the call connects.
     * @param videoState The desired video state for the outgoing call.
     */
    void placeOutgoingCall(Call call, Uri handle, GatewayInfo gatewayInfo, boolean speakerphoneOn,
            int videoState) {
        if (call == null) {
            // don't do anything if the call no longer exists
            Log.i(this, "Canceling unknown call.");
            return;
        }

        final Uri uriHandle = (gatewayInfo == null) ? handle : gatewayInfo.getGatewayAddress();

        if (gatewayInfo == null) {
            Log.i(this, "Creating a new outgoing call with handle: %s", Log.piiHandle(uriHandle));
        } else {
            Log.i(this, "Creating a new outgoing call with gateway handle: %s, original handle: %s",
                    Log.pii(uriHandle), Log.pii(handle));
        }

        call.setHandle(uriHandle);
        call.setGatewayInfo(gatewayInfo);
        // Auto-enable speakerphone if the originating intent specified to do so, or if the call
        // is a video call or if the phone is docked.
        call.setStartWithSpeakerphoneOn(speakerphoneOn || isSpeakerphoneAutoEnabled(videoState)
                || mDockManager.isDocked());
        call.setVideoState(videoState);

        if (call.isEmergencyCall()) {
            // Emergency -- CreateConnectionProcessor will choose accounts automatically
            call.setTargetPhoneAccount(null);
        }

        if (call.getTargetPhoneAccount() != null || call.isEmergencyCall()) {
            if (!call.isEmergencyCall()) {
                updateLchStatus(call.getTargetPhoneAccount().getId());
            }
            // If the account has been set, proceed to place the outgoing call.
            // Otherwise the connection will be initiated when the account is set by the user.
            call.startCreateConnection(mPhoneAccountRegistrar);
        }
    }

    /**
     * Attempts to add participant in a call.
     *
     * @param number number to connect the call with.
     */
    private void addParticipant(String number) {
        Log.i(this, "addParticipant number ="+number);
        if (getForegroundCall() == null) {
            // don't do anything if the call no longer exists
            Log.i(this, "Canceling unknown call.");
            return;
        } else {
            getForegroundCall().addParticipantWithConference(number);
        }
    }


    /**
     * Attempts to start a conference call for the specified call.
     *
     * @param call The call to conference.
     * @param otherCall The other call to conference with.
     */
    void conference(Call call, Call otherCall) {
        call.conferenceWith(otherCall);
    }

    /**
     * Instructs Telecom to answer the specified call. Intended to be invoked by the in-call
     * app through {@link InCallAdapter} after Telecom notifies it of an incoming call followed by
     * the user opting to answer said call.
     *
     * @param call The call to answer.
     * @param videoState The video state in which to answer the call.
     */
    void answerCall(Call call, int videoState) {
        if (!mCalls.contains(call)) {
            Log.i(this, "Request to answer a non-existent call %s", call);
        } else {
            Call activeCall = getFirstCallWithState(call.getTargetPhoneAccount()
                    .getId(), CallState.ACTIVE, CallState.DIALING);
            // If the foreground call is not the ringing call and it is currently isActive() or
            // STATE_DIALING, put it on hold before answering the call.
            if (activeCall != null && activeCall != call &&
                    (activeCall.isActive() ||
                     activeCall.getState() == CallState.DIALING)) {
                if (0 == (mForegroundCall.getConnectionCapabilities()
                        & Connection.CAPABILITY_HOLD)) {
                    // This call does not support hold.  If it is from a different connection
                    // service, then disconnect it, otherwise allow the connection service to
                    // figure out the right states.
                    if (activeCall.getConnectionService() != call.getConnectionService()) {
                        activeCall.disconnect();
                    }
                } else {
                    Call heldCall = getHeldCall();
                    if (heldCall != null) {
                        Log.v(this, "Disconnecting held call %s before holding active call.",
                                heldCall);
                        heldCall.disconnect();
                    }

                    Log.v(this, "Holding active/dialing call %s before answering incoming call %s.",
                            mForegroundCall, call);
                    activeCall.hold();
                }
                // TODO: Wait until we get confirmation of the active call being
                // on-hold before answering the new call.
                // TODO: Import logic from CallManager.acceptCall()
            }

            for (CallsManagerListener listener : mListeners) {
                listener.onIncomingCallAnswered(call);
            }
            updateLchStatus(call.getTargetPhoneAccount().getId());
            // We do not update the UI until we get confirmation of the answer() through
            // {@link #markCallAsActive}.
            call.answer(videoState);
            if (isSpeakerphoneAutoEnabled(videoState)) {
                call.setStartWithSpeakerphoneOn(true);
            }
        }
    }

    /**
     * Determines if the speakerphone should be automatically enabled for the call.  Speakerphone
     * should be enabled if the call is a video call and bluetooth or the wired headset are not in
     * use.
     *
     * @param videoState The video state of the call.
     * @return {@code true} if the speakerphone should be enabled.
     */
    private boolean isSpeakerphoneAutoEnabled(int videoState) {
        return VideoProfile.isVideo(videoState) &&
            !mWiredHeadsetManager.isPluggedIn() &&
            !mCallAudioManager.isBluetoothDeviceAvailable() &&
            isSpeakerEnabledForVideoCalls();
    }

    /**
     * Determines if the speakerphone should be automatically enabled for video calls.
     *
     * @return {@code true} if the speakerphone should automatically be enabled.
     */
    private static boolean isSpeakerEnabledForVideoCalls() {
        return (SystemProperties.getInt(TelephonyProperties.PROPERTY_VIDEOCALL_AUDIO_OUTPUT,
                PhoneConstants.AUDIO_OUTPUT_DEFAULT) ==
                PhoneConstants.AUDIO_OUTPUT_ENABLE_SPEAKER);
    }

    /**
     * Instructs Telecom to reject the specified call. Intended to be invoked by the in-call
     * app through {@link InCallAdapter} after Telecom notifies it of an incoming call followed by
     * the user opting to reject said call.
     */
    void rejectCall(Call call, boolean rejectWithMessage, String textMessage) {
        if (!mCalls.contains(call)) {
            Log.i(this, "Request to reject a non-existent call %s", call);
        } else {
            for (CallsManagerListener listener : mListeners) {
                listener.onIncomingCallRejected(call, rejectWithMessage, textMessage);
            }
            setActiveSubscription(getConversationSub());
            call.reject(rejectWithMessage, textMessage);
        }
    }

    /**
     * Instructs Telecom to play the specified DTMF tone within the specified call.
     *
     * @param digit The DTMF digit to play.
     */
    void playDtmfTone(Call call, char digit) {
        if (!mCalls.contains(call)) {
            Log.i(this, "Request to play DTMF in a non-existent call %s", call);
        } else {
            call.playDtmfTone(digit);
            mDtmfLocalTonePlayer.playTone(call, digit);
        }
    }

    /**
     * Instructs Telecom to stop the currently playing DTMF tone, if any.
     */
    void stopDtmfTone(Call call) {
        if (!mCalls.contains(call)) {
            Log.i(this, "Request to stop DTMF in a non-existent call %s", call);
        } else {
            call.stopDtmfTone();
            mDtmfLocalTonePlayer.stopTone(call);
        }
    }

    /**
     * Instructs Telecom to continue (or not) the current post-dial DTMF string, if any.
     */
    void postDialContinue(Call call, boolean proceed) {
        if (!mCalls.contains(call)) {
            Log.i(this, "Request to continue post-dial string in a non-existent call %s", call);
        } else {
            call.postDialContinue(proceed);
        }
    }

    /**
     * Instructs Telecom to disconnect the specified call. Intended to be invoked by the
     * in-call app through {@link InCallAdapter} for an ongoing call. This is usually triggered by
     * the user hitting the end-call button.
     */
    void disconnectCall(Call call) {
        Log.v(this, "disconnectCall %s", call);

        if (!mCalls.contains(call)) {
            Log.w(this, "Unknown call (%s) asked to disconnect", call);
        } else {
            mLocallyDisconnectingCalls.add(call);
            call.disconnect();
        }
    }

    /**
     * Instructs Telecom to disconnect all calls.
     */
    void disconnectAllCalls() {
        Log.v(this, "disconnectAllCalls");

        for (Call call : mCalls) {
            disconnectCall(call);
        }
    }


    /**
     * Instructs Telecom to put the specified call on hold. Intended to be invoked by the
     * in-call app through {@link InCallAdapter} for an ongoing call. This is usually triggered by
     * the user hitting the hold button during an active call.
     */
    void holdCall(Call call) {
        if (!mCalls.contains(call)) {
            Log.w(this, "Unknown call (%s) asked to be put on hold", call);
        } else {
            Log.d(this, "Putting call on hold: (%s)", call);
            call.hold();
        }
    }

    /**
     * Instructs Telecom to release the specified call from hold. Intended to be invoked by
     * the in-call app through {@link InCallAdapter} for an ongoing call. This is usually triggered
     * by the user hitting the hold button during a held call.
     */
    void unholdCall(Call call) {
        if (!mCalls.contains(call)) {
            Log.w(this, "Unknown call (%s) asked to be removed from hold", call);
        } else {
            Log.d(this, "unholding call: (%s)", call);
            for (Call c : mCalls) {
                PhoneAccountHandle ph = call.getTargetPhoneAccount();
                PhoneAccountHandle ph1 = c.getTargetPhoneAccount();
                // Only attempt to hold parent calls and not the individual children.
                // if 'c' is not for same subscription as call, then don't disturb 'c'
                if (c != null && c.isAlive() && c != call && c.getParentCall() == null
                        && (ph != null && ph1 != null &&
                        isSamePhAccIdOrSipId(ph.getId(), ph1.getId()))) {
                    c.hold();
                }
            }
            call.unhold();
        }
    }

    /**
     *  Returns true if the ids are same or one of the ids is sip id.
     */
    private boolean isSamePhAccIdOrSipId(String id1, String id2) {
        boolean ret = ((id1 != null && id2 != null) &&
                (id1.equals(id2) || id1.contains("sip") || id2.contains("sip")));
        Log.d(this, "isSamePhAccIdOrSipId: id1 = " + id1 + " id2 = " + id2 + " ret = " + ret);
        return ret;
    }

    /** Called by the in-call UI to change the mute state. */
    void mute(boolean shouldMute) {
        mCallAudioManager.mute(shouldMute);
    }

    /**
      * Called by the in-call UI to change the audio route, for example to change from earpiece to
      * speaker phone.
      */
    void setAudioRoute(int route) {
        Log.d(this, "Audio routed by user");
        mCallAudioManager.mUserSetAudioRoute = true;
        mCallAudioManager.setAudioRoute(route);
        mCallAudioManager.mUserSetAudioRoute = false;
    }

    /** Called by the in-call UI to turn the proximity sensor on. */
    void turnOnProximitySensor() {
        mProximitySensorManager.turnOn();
    }

    /**
     * Called by the in-call UI to turn the proximity sensor off.
     * @param screenOnImmediately If true, the screen will be turned on immediately. Otherwise,
     *        the screen will be kept off until the proximity sensor goes negative.
     */
    void turnOffProximitySensor(boolean screenOnImmediately) {
        mProximitySensorManager.turnOff(screenOnImmediately);
    }

    void phoneAccountSelected(Call call, PhoneAccountHandle account, boolean setDefault) {
        if (!mCalls.contains(call)) {
            Log.i(this, "Attempted to add account to unknown call %s", call);
        } else {
            // TODO: There is an odd race condition here. Since NewOutgoingCallIntentBroadcaster and
            // the SELECT_PHONE_ACCOUNT sequence run in parallel, if the user selects an account before the
            // NEW_OUTGOING_CALL sequence finishes, we'll start the call immediately without
            // respecting a rewritten number or a canceled number. This is unlikely since
            // NEW_OUTGOING_CALL sequence, in practice, runs a lot faster than the user selecting
            // a phone account from the in-call UI.
            Log.i(this, "phoneAccountSelected , id = %s", account.getId());
            updateLchStatus(account.getId());
            call.setTargetPhoneAccount(account);

            // Note: emergency calls never go through account selection dialog so they never
            // arrive here.
            if (makeRoomForOutgoingCall(call, false /* isEmergencyCall */)) {
                call.startCreateConnection(mPhoneAccountRegistrar);
            } else {
                call.disconnect();
            }

            if (setDefault) {
                mPhoneAccountRegistrar.setUserSelectedOutgoingPhoneAccount(account);
            }
        }
    }

    /** Called when the audio state changes. */
    void onCallAudioStateChanged(CallAudioState oldAudioState, CallAudioState newAudioState) {
        Log.v(this, "onAudioStateChanged, audioState: %s -> %s", oldAudioState, newAudioState);
        for (CallsManagerListener listener : mListeners) {
            listener.onCallAudioStateChanged(oldAudioState, newAudioState);
        }
    }

    void markCallAsRinging(Call call) {
        setCallState(call, CallState.RINGING, "ringing set explicitly");
    }

    void markCallAsDialing(Call call) {
        setCallState(call, CallState.DIALING, "dialing set explicitly");
        maybeMoveToEarpiece(call);
        maybeMoveToSpeakerPhone(call);
        setActiveSubscription(call.getTargetPhoneAccount().getId());
    }

    void markCallAsActive(Call call) {
        setCallState(call, CallState.ACTIVE, "active set explicitly");
        maybeMoveToSpeakerPhone(call);
    }

    void markCallAsOnHold(Call call) {
        setCallState(call, CallState.ON_HOLD, "on-hold set explicitly");
    }

    /**
     * Marks the specified call as STATE_DISCONNECTED and notifies the in-call app. If this was the
     * last live call, then also disconnect from the in-call controller.
     *
     * @param disconnectCause The disconnect cause, see {@link android.telecom.DisconnectCause}.
     */
    void markCallAsDisconnected(Call call, DisconnectCause disconnectCause) {
        // Show MT call in call log as a missed call if immediately disconnected
        // before creating a connection.
        if (!mCalls.contains(call) && (DisconnectCause.MISSED == disconnectCause.getCode())) {
            addCall(call);
            mMissedCallNotifier.showMissedCallNotification(call);
        }
        call.setDisconnectCause(disconnectCause);
        int prevState = call.getState();
        setCallState(call, CallState.DISCONNECTED, "disconnected set explicitly");
        String activeSub = getActiveSubscription();
        String conversationSub = getConversationSub();
        String lchSub = IsAnySubInLch();

        PhoneAccount phAcc =
                 getPhoneAccountRegistrar().getPhoneAccount(call.getTargetPhoneAccount());
        if (activeSub != null && (call.getTargetPhoneAccount() != null &&
                    call.getTargetPhoneAccount().getId().equals(activeSub)) &&
                    (phAcc != null) && (phAcc.isSet(PhoneAccount.LCH)) &&
                    (conversationSub != null) &&
                    (!conversationSub.equals(activeSub))) {
            Log.d(this,"Set active sub to conversation sub");
            setActiveSubscription(conversationSub);
        } else if ((conversationSub == null) && (lchSub != null) &&
                ((prevState == CallState.CONNECTING) || (prevState ==
                CallState.SELECT_PHONE_ACCOUNT)) &&
                (call.getState() == CallState.DISCONNECTED)) {
            Log.d(this,"remove sub with call from LCH");
            updateLchStatus(lchSub);
            setActiveSubscription(lchSub);
            manageDsdaInCallTones(false);
        }

        if ((call.getTargetPhoneAccount() != null) && (phAcc != null) &&
                (phAcc.isSet(PhoneAccount.LCH))) {
            Call activecall = getFirstCallWithState(call.getTargetPhoneAccount().getId(),
                    CallState.RINGING, CallState.DIALING, CallState.ACTIVE, CallState.ON_HOLD);
            Log.d(this,"activecall: " + activecall);
            if (activecall == null) {
                phAcc.unSetBit(PhoneAccount.LCH);
                manageDsdaInCallTones(false);
            }
        }
    }

    private String IsAnySubInLch() {
        for (PhoneAccountHandle ph : getPhoneAccountRegistrar().getSimPhoneAccounts()) {
            PhoneAccount phAcc = getPhoneAccountRegistrar().getPhoneAccount(ph);
            if ((phAcc != null) && (phAcc.isSet(PhoneAccount.LCH))) {
                Log.d(this, "Sub in LCH: " + ph.getId());
                return ph.getId();
            }
        }
        return null;
    }

    /**
     * Removes an existing disconnected call, and notifies the in-call app.
     */
    void markCallAsRemoved(Call call) {
        removeCall(call);
        if (!hasAnyCalls()) {
            updateLchStatus(null);
            setActiveSubscription(null);
            manageDsdaInCallTones(false);
        }
        if (mLocallyDisconnectingCalls.contains(call)) {
            mLocallyDisconnectingCalls.remove(call);
            if (mForegroundCall != null && mForegroundCall.getState() == CallState.ON_HOLD) {
                mForegroundCall.unhold();
            }
        }
    }

    /**
     * Cleans up any calls currently associated with the specified connection service when the
     * service binder disconnects unexpectedly.
     *
     * @param service The connection service that disconnected.
     */
    void handleConnectionServiceDeath(ConnectionServiceWrapper service) {
        if (service != null) {
            for (Call call : mCalls) {
                if (call.getConnectionService() == service) {
                    if (call.getState() != CallState.DISCONNECTED) {
                        markCallAsDisconnected(call, new DisconnectCause(D