HdmiCecLocalDevice.java revision 2918e9e133de8066ab497a5f8dac1c310c792767
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 com.android.server.hdmi.HdmiCecController.AllocateLogicalAddressCallback; 20 21import android.hardware.hdmi.HdmiCec; 22 23/** 24 * Class that models a logical CEC device hosted in this system. Handles initialization, 25 * CEC commands that call for actions customized per device type. 26 */ 27abstract class HdmiCecLocalDevice { 28 29 protected final HdmiCecController mController; 30 protected final int mDeviceType; 31 protected int mAddress; 32 protected int mPreferredAddress; 33 34 protected HdmiCecLocalDevice(HdmiCecController controller, int deviceType) { 35 mController = controller; 36 mDeviceType = deviceType; 37 mAddress = HdmiCec.ADDR_UNREGISTERED; 38 } 39 40 // Factory method that returns HdmiCecLocalDevice of corresponding type. 41 static HdmiCecLocalDevice create(HdmiCecController controller, int deviceType) { 42 switch (deviceType) { 43 case HdmiCec.DEVICE_TV: 44 return new HdmiCecLocalDeviceTv(controller); 45 case HdmiCec.DEVICE_PLAYBACK: 46 return new HdmiCecLocalDevicePlayback(controller); 47 default: 48 return null; 49 } 50 } 51 52 abstract void init(); 53 54 protected void allocateAddress(int type) { 55 mController.allocateLogicalAddress(type, mPreferredAddress, 56 new AllocateLogicalAddressCallback() { 57 @Override 58 public void onAllocated(int deviceType, int logicalAddress) { 59 mAddress = mPreferredAddress = logicalAddress; 60 mController.addLogicalAddress(logicalAddress); 61 } 62 }); 63 } 64 65 // Returns true if the logical address is same as the argument. 66 boolean isAddressOf(int addr) { 67 return addr == mAddress; 68 } 69 70 // Resets the logical address to unregistered(15), meaning the logical device is invalid. 71 void clearAddress() { 72 mAddress = HdmiCec.ADDR_UNREGISTERED; 73 } 74 75 void setPreferredAddress(int addr) { 76 mPreferredAddress = addr; 77 } 78} 79