HdmiControlService.java revision 0792d37385e60aa8d73f8df174d0a32f4f618bc4 
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
17package com.android.server.hdmi;
18
19import android.annotation.Nullable;
20import android.content.Context;
21import android.os.Handler;
22import android.os.HandlerThread;
23import android.os.Message;
24import android.util.Slog;
25
26import com.android.server.SystemService;
27
28/**
29 * Provides a service for sending and processing HDMI control messages,
30 * HDMI-CEC and MHL control command, and providing the information on both standard.
31 */
32public final class HdmiControlService extends SystemService {
33    private static final String TAG = "HdmiControlService";
34
35    // A thread to handle synchronous IO of CEC and MHL control service.
36    // Since all of CEC and MHL HAL interfaces processed in short time (< 200ms)
37    // and sparse call it shares a thread to handle IO operations.
38    private final HandlerThread mIoThread = new HandlerThread("Hdmi Control Io Thread");
39
40    // Main handler class to handle incoming message from each controller.
41    private final Handler mHandler = new Handler() {
42        @Override
43        public void handleMessage(Message msg) {
44            // TODO: Add handler for each message type.
45        }
46    };
47
48    @Nullable
49    private HdmiCecController mCecController;
50
51    @Nullable
52    private HdmiMhlController mMhlController;
53
54    public HdmiControlService(Context context) {
55        super(context);
56    }
57
58    @Override
59    public void onStart() {
60        mCecController = HdmiCecController.create(mIoThread.getLooper(), mHandler);
61        if (mCecController == null) {
62            Slog.i(TAG, "Device does not support HDMI-CEC.");
63        }
64
65        mMhlController = HdmiMhlController.create(mIoThread.getLooper(), mHandler);
66        if (mMhlController == null) {
67            Slog.i(TAG, "Device does not support MHL-control.");
68        }
69    }
70}
71