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      1 /*
      2  * Copyright (C) 2014 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.server.telecom;
     18 
     19 import android.content.BroadcastReceiver;
     20 import android.content.Context;
     21 import android.content.Intent;
     22 import android.content.IntentFilter;
     23 import android.media.AudioManager;
     24 import android.os.UserHandle;
     25 import android.provider.Settings;
     26 import android.telecom.Log;
     27 import android.telecom.TelecomManager;
     28 
     29 import com.android.internal.util.IndentingPrintWriter;
     30 
     31 // TODO: Needed for move to system service: import com.android.internal.R;
     32 
     33 final class TtyManager implements WiredHeadsetManager.Listener {
     34     private final TtyBroadcastReceiver mReceiver = new TtyBroadcastReceiver();
     35     private final Context mContext;
     36     private final WiredHeadsetManager mWiredHeadsetManager;
     37     private int mPreferredTtyMode = TelecomManager.TTY_MODE_OFF;
     38     private int mCurrentTtyMode = TelecomManager.TTY_MODE_OFF;
     39 
     40     TtyManager(Context context, WiredHeadsetManager wiredHeadsetManager) {
     41         mContext = context;
     42         mWiredHeadsetManager = wiredHeadsetManager;
     43         mWiredHeadsetManager.addListener(this);
     44 
     45         mPreferredTtyMode = Settings.Secure.getInt(
     46                 mContext.getContentResolver(),
     47                 Settings.Secure.PREFERRED_TTY_MODE,
     48                 TelecomManager.TTY_MODE_OFF);
     49 
     50         IntentFilter intentFilter = new IntentFilter(
     51                 TelecomManager.ACTION_TTY_PREFERRED_MODE_CHANGED);
     52         mContext.registerReceiver(mReceiver, intentFilter);
     53 
     54         updateCurrentTtyMode();
     55     }
     56 
     57     boolean isTtySupported() {
     58         boolean isEnabled = mContext.getResources().getBoolean(R.bool.tty_enabled);
     59         Log.v(this, "isTtySupported: %b", isEnabled);
     60         return isEnabled;
     61     }
     62 
     63     int getCurrentTtyMode() {
     64         return mCurrentTtyMode;
     65     }
     66 
     67     @Override
     68     public void onWiredHeadsetPluggedInChanged(boolean oldIsPluggedIn, boolean newIsPluggedIn) {
     69         Log.v(this, "onWiredHeadsetPluggedInChanged");
     70         updateCurrentTtyMode();
     71     }
     72 
     73     private void updateCurrentTtyMode() {
     74         int newTtyMode = TelecomManager.TTY_MODE_OFF;
     75         if (isTtySupported() && mWiredHeadsetManager.isPluggedIn()) {
     76             newTtyMode = mPreferredTtyMode;
     77         }
     78         Log.v(this, "updateCurrentTtyMode, %d -> %d", mCurrentTtyMode, newTtyMode);
     79 
     80         if (mCurrentTtyMode != newTtyMode) {
     81             mCurrentTtyMode = newTtyMode;
     82             Intent ttyModeChanged = new Intent(TelecomManager.ACTION_CURRENT_TTY_MODE_CHANGED);
     83             ttyModeChanged.putExtra(TelecomManager.EXTRA_CURRENT_TTY_MODE, mCurrentTtyMode);
     84             mContext.sendBroadcastAsUser(ttyModeChanged, UserHandle.ALL);
     85 
     86             updateAudioTtyMode();
     87         }
     88     }
     89 
     90     private void updateAudioTtyMode() {
     91         String audioTtyMode;
     92         switch (mCurrentTtyMode) {
     93             case TelecomManager.TTY_MODE_FULL:
     94                 audioTtyMode = "tty_full";
     95                 break;
     96             case TelecomManager.TTY_MODE_VCO:
     97                 audioTtyMode = "tty_vco";
     98                 break;
     99             case TelecomManager.TTY_MODE_HCO:
    100                 audioTtyMode = "tty_hco";
    101                 break;
    102             case TelecomManager.TTY_MODE_OFF:
    103             default:
    104                 audioTtyMode = "tty_off";
    105                 break;
    106         }
    107         Log.v(this, "updateAudioTtyMode, %s", audioTtyMode);
    108 
    109         AudioManager audioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE);
    110         audioManager.setParameters("tty_mode=" + audioTtyMode);
    111     }
    112 
    113     private final class TtyBroadcastReceiver extends BroadcastReceiver {
    114         @Override
    115         public void onReceive(Context context, Intent intent) {
    116             Log.startSession("TBR.oR");
    117             try {
    118                 String action = intent.getAction();
    119                 Log.v(TtyManager.this, "onReceive, action: %s", action);
    120                 if (action.equals(TelecomManager.ACTION_TTY_PREFERRED_MODE_CHANGED)) {
    121                     int newPreferredTtyMode = intent.getIntExtra(
    122                             TelecomManager.EXTRA_TTY_PREFERRED_MODE, TelecomManager.TTY_MODE_OFF);
    123                     if (mPreferredTtyMode != newPreferredTtyMode) {
    124                         mPreferredTtyMode = newPreferredTtyMode;
    125                         updateCurrentTtyMode();
    126                     }
    127                 }
    128             } finally {
    129                 Log.endSession();
    130             }
    131         }
    132     }
    133 
    134     /**
    135      * Dumps the state of the {@link TtyManager}.
    136      *
    137      * @param pw The {@code IndentingPrintWriter} to write the state to.
    138      */
    139     public void dump(IndentingPrintWriter pw) {
    140         pw.println("mCurrentTtyMode: " + mCurrentTtyMode);
    141     }
    142 }
    143