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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.hdmi;
     18 
     19 import android.annotation.Nullable;
     20 import android.hardware.hdmi.IHdmiControlCallback;
     21 import android.hardware.hdmi.HdmiDeviceInfo;
     22 import android.hardware.hdmi.HdmiControlManager;
     23 import android.os.RemoteException;
     24 import android.util.Slog;
     25 
     26 import com.android.server.hdmi.HdmiCecLocalDevice.ActiveSource;
     27 
     28 /**
     29  * Handles CEC command <Active Source>.
     30  * <p>
     31  * Used by feature actions that need to handle the command in their flow. Only for TV
     32  * local device.
     33  */
     34 final class ActiveSourceHandler {
     35     private static final String TAG = "ActiveSourceHandler";
     36 
     37     private final HdmiCecLocalDeviceTv mSource;
     38     private final HdmiControlService mService;
     39     @Nullable
     40     private final IHdmiControlCallback mCallback;
     41 
     42     static ActiveSourceHandler create(HdmiCecLocalDeviceTv source, IHdmiControlCallback callback) {
     43         if (source == null) {
     44             Slog.e(TAG, "Wrong arguments");
     45             return null;
     46         }
     47         return new ActiveSourceHandler(source, callback);
     48     }
     49 
     50     private ActiveSourceHandler(HdmiCecLocalDeviceTv source, IHdmiControlCallback callback) {
     51         mSource = source;
     52         mService = mSource.getService();
     53         mCallback = callback;
     54     }
     55 
     56     /**
     57      * Handles the incoming active source command.
     58      *
     59      * @param newActive new active source information
     60      * @param deviceType device type of the new active source
     61      */
     62     void process(ActiveSource newActive, int deviceType) {
     63         // Seq #17
     64         HdmiCecLocalDeviceTv tv = mSource;
     65         HdmiDeviceInfo device = mService.getDeviceInfo(newActive.logicalAddress);
     66         if (device == null) {
     67             tv.startNewDeviceAction(newActive, deviceType);
     68         }
     69 
     70         if (!tv.isProhibitMode()) {
     71             ActiveSource old = ActiveSource.of(tv.getActiveSource());
     72             tv.updateActiveSource(newActive);
     73             boolean notifyInputChange = (mCallback == null);
     74             if (!old.equals(newActive)) {
     75                 tv.setPrevPortId(tv.getActivePortId());
     76             }
     77             tv.updateActiveInput(newActive.physicalAddress, notifyInputChange);
     78             invokeCallback(HdmiControlManager.RESULT_SUCCESS);
     79         } else {
     80             // TV is in a mode that should keep its current source/input from
     81             // being changed for its operation. Reclaim the active source
     82             // or switch the port back to the one used for the current mode.
     83             ActiveSource current = tv.getActiveSource();
     84             if (current.logicalAddress == getSourceAddress()) {
     85                 HdmiCecMessage activeSourceCommand = HdmiCecMessageBuilder.buildActiveSource(
     86                         current.logicalAddress, current.physicalAddress);
     87                 mService.sendCecCommand(activeSourceCommand);
     88                 tv.updateActiveSource(current);
     89                 invokeCallback(HdmiControlManager.RESULT_SUCCESS);
     90             } else {
     91                 tv.startRoutingControl(newActive.physicalAddress, current.physicalAddress, true,
     92                         mCallback);
     93             }
     94         }
     95     }
     96 
     97     private final int getSourceAddress() {
     98         return mSource.getDeviceInfo().getLogicalAddress();
     99     }
    100 
    101     private void invokeCallback(int result) {
    102         if (mCallback == null) {
    103             return;
    104         }
    105         try {
    106             mCallback.onComplete(result);
    107         } catch (RemoteException e) {
    108             Slog.e(TAG, "Callback failed:" + e);
    109         }
    110     }
    111 }
    112