Jungshik Jang | 0792d37 | 2014-04-23 17:57:26 +0900 | [diff] [blame^] | 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.os.Handler; |
| 20 | import android.os.Looper; |
| 21 | import android.os.Message; |
| 22 | |
| 23 | /** |
| 24 | * Manages HDMI-CEC command and behaviors. It converts user's command into CEC command |
| 25 | * and pass it to CEC HAL so that it sends message to other device. For incoming |
| 26 | * message it translates the message and delegates it to proper module. |
| 27 | * |
| 28 | * <p>It can be created only by {@link HdmiCecController#create} |
| 29 | * |
| 30 | * <p>Declared as package-private, accessed by {@link HdmiControlService} only. |
| 31 | */ |
| 32 | class HdmiCecController { |
| 33 | private static final String TAG = "HdmiCecController"; |
| 34 | |
| 35 | // Handler instance to process synchronous I/O (mainly send) message. |
| 36 | private Handler mIoHandler; |
| 37 | |
| 38 | // Handler instance to process various messages coming from other CEC |
| 39 | // device or issued by internal state change. |
| 40 | private Handler mMessageHandler; |
| 41 | |
| 42 | // Stores the pointer to the native implementation of the service that |
| 43 | // interacts with HAL. |
| 44 | private long mNativePtr; |
| 45 | |
| 46 | // Private constructor. Use HdmiCecController.create(). |
| 47 | private HdmiCecController() { |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * A factory method to get {@link HdmiCecController}. If it fails to initialize |
| 52 | * inner device or has no device it will return {@code null}. |
| 53 | * |
| 54 | * <p>Declared as package-private, accessed by {@link HdmiControlService} only. |
| 55 | * |
| 56 | * @param ioLooper a Looper instance to handle IO (mainly send message) operation. |
| 57 | * @param messageHandler a message handler that processes a message coming from other |
| 58 | * CEC compatible device or callback of internal state change. |
| 59 | * @return {@link HdmiCecController} if device is initialized successfully. Otherwise, |
| 60 | * returns {@code null}. |
| 61 | */ |
| 62 | static HdmiCecController create(Looper ioLooper, Handler messageHandler) { |
| 63 | HdmiCecController handler = new HdmiCecController(); |
| 64 | long nativePtr = nativeInit(handler); |
| 65 | if (nativePtr == 0L) { |
| 66 | handler = null; |
| 67 | return null; |
| 68 | } |
| 69 | |
| 70 | handler.init(ioLooper, messageHandler, nativePtr); |
| 71 | return handler; |
| 72 | } |
| 73 | |
| 74 | private void init(Looper ioLooper, Handler messageHandler, long nativePtr) { |
| 75 | mIoHandler = new Handler(ioLooper) { |
| 76 | @Override |
| 77 | public void handleMessage(Message msg) { |
| 78 | // TODO: Call native sendMessage. |
| 79 | } |
| 80 | }; |
| 81 | |
| 82 | mMessageHandler = messageHandler; |
| 83 | mNativePtr = nativePtr; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Called by native when an HDMI-CEC message arrived. |
| 88 | */ |
| 89 | private void handleMessage(int srcAddress, int dstAddres, int opcode, byte[] params) { |
| 90 | // TODO: Translate message and delegate it to main message handler. |
| 91 | } |
| 92 | |
| 93 | private static native long nativeInit(HdmiCecController handler); |
| 94 | } |