| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.hdmi; |
| |
| import android.hardware.hdmi.HdmiCec; |
| import android.hardware.hdmi.HdmiCecMessage; |
| import android.hardware.hdmi.IHdmiCecListener; |
| import android.os.Binder; |
| import android.os.RemoteException; |
| import android.util.Log; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * HdmiCecDevice class represents a CEC logical device characterized |
| * by its device type. It is a superclass of those serving concrete device type. |
| * Currently we're interested in playback(one of sources), display(sink) device type |
| * only. The support for the other types like recorder, audio system will come later. |
| * |
| * <p>A physical device can contain the functions of |
| * more than one logical device, in which case it should create |
| * as many logical devices as necessary. |
| * |
| * <p>Note that if a physical device has multiple instances of a particular |
| * functionality, it should advertize only one instance. For instance, if |
| * a device has multiple tuners, it should only expose one for control |
| * via CEC. In this case, it is up to the device itself to manage multiple tuners. |
| * |
| * <p>The version of HDMI-CEC protocol supported in this class is 1.3a. |
| * |
| * <p>Declared as package-private, accessed by HdmiCecService only. |
| */ |
| abstract class HdmiCecDevice { |
| private static final String TAG = "HdmiCecDevice"; |
| |
| private final int mType; |
| |
| // List of listeners to the message/event coming to the device. |
| private final List<IHdmiCecListener> mListeners = new ArrayList<IHdmiCecListener>(); |
| private final Binder mBinder = new Binder(); |
| private final HdmiCecService mService; |
| |
| private boolean mIsActiveSource; |
| |
| /** |
| * Factory method that creates HdmiCecDevice instance to the device type. |
| */ |
| public static HdmiCecDevice create(HdmiCecService service, int type) { |
| if (type == HdmiCec.DEVICE_PLAYBACK) { |
| return new HdmiCecDevicePlayback(service, type); |
| } else if (type == HdmiCec.DEVICE_TV) { |
| return new HdmiCecDeviceTv(service, type); |
| } |
| return null; |
| } |
| |
| /** |
| * Constructor. |
| */ |
| public HdmiCecDevice(HdmiCecService service, int type) { |
| mService = service; |
| mType = type; |
| mIsActiveSource = false; |
| } |
| |
| /** |
| * Called right after the class is instantiated. This method can be used to |
| * implement any initialization tasks for the instance. |
| */ |
| abstract public void initialize(); |
| |
| /** |
| * Return the binder token that identifies this instance. |
| */ |
| public Binder getToken() { |
| return mBinder; |
| } |
| |
| /** |
| * Return the service instance. |
| */ |
| public HdmiCecService getService() { |
| return mService; |
| } |
| |
| /** |
| * Return the type of this device. |
| */ |
| public int getType() { |
| return mType; |
| } |
| |
| /** |
| * Register a listener to be invoked when events occur. |
| * |
| * @param listener the listern that will run |
| */ |
| public void addListener(IHdmiCecListener listener) { |
| mListeners.add(listener); |
| } |
| |
| /** |
| * Remove the listener that was previously registered. |
| * |
| * @param listener IHdmiCecListener instance to be removed |
| */ |
| public void removeListener(IHdmiCecListener listener) { |
| mListeners.remove(listener); |
| } |
| |
| /** |
| * Indicate if the device has listeners. |
| * |
| * @return true if there are listener instances for this device |
| */ |
| public boolean hasListener() { |
| return !mListeners.isEmpty(); |
| } |
| |
| /** |
| * Handle HDMI-CEC message coming to the device by invoking the registered |
| * listeners. |
| */ |
| public void handleMessage(int srcAddress, int dstAddress, int opcode, byte[] params) { |
| if (opcode == HdmiCec.MESSAGE_ACTIVE_SOURCE) { |
| mIsActiveSource = false; |
| } |
| |
| if (mListeners.size() == 0) { |
| return; |
| } |
| HdmiCecMessage message = new HdmiCecMessage(srcAddress, dstAddress, opcode, params); |
| for (IHdmiCecListener listener : mListeners) { |
| try { |
| listener.onMessageReceived(message); |
| } catch (RemoteException e) { |
| Log.e(TAG, "listener.onMessageReceived failed."); |
| } |
| } |
| } |
| |
| public void handleHotplug(boolean connected) { |
| for (IHdmiCecListener listener : mListeners) { |
| try { |
| listener.onCableStatusChanged(connected); |
| } catch (RemoteException e) { |
| Log.e(TAG, "listener.onCableStatusChanged failed."); |
| } |
| } |
| } |
| |
| /** |
| * Return the active status of the device. |
| * |
| * @return true if the device is the active source among the connected |
| * HDMI-CEC-enabled devices; otherwise false. |
| */ |
| public boolean isActiveSource() { |
| return mIsActiveSource; |
| } |
| |
| /** |
| * Update the active source state of the device. |
| */ |
| public void setIsActiveSource(boolean state) { |
| mIsActiveSource = state; |
| } |
| |
| /** |
| * Send <Active Source> command. The default implementation does nothing. Should be |
| * overriden by subclass. |
| */ |
| public void sendActiveSource(int physicalAddress) { |
| logWarning("<Active Source> not valid for the device type: " + mType |
| + " address:" + physicalAddress); |
| } |
| |
| /** |
| * Send <Inactive Source> command. The default implementation does nothing. Should be |
| * overriden by subclass. |
| */ |
| public void sendInactiveSource(int physicalAddress) { |
| logWarning("<Inactive Source> not valid for the device type: " + mType |
| + " address:" + physicalAddress); |
| } |
| |
| /** |
| * Send <Image View On> command. The default implementation does nothing. Should be |
| * overriden by subclass. |
| */ |
| public void sendImageViewOn() { |
| logWarning("<Image View On> not valid for the device type: " + mType); |
| } |
| |
| /** |
| * Send <Text View On> command. The default implementation does nothing. Should be |
| * overriden by subclass. |
| */ |
| public void sendTextViewOn() { |
| logWarning("<Text View On> not valid for the device type: " + mType); |
| } |
| |
| /** |
| * Check if the connected sink device is in powered-on state. The default implementation |
| * simply returns false. Should be overriden by subclass to report the correct state. |
| */ |
| public boolean isSinkDeviceOn() { |
| logWarning("isSinkDeviceOn() not valid for the device type: " + mType); |
| return false; |
| } |
| |
| private void logWarning(String msg) { |
| Log.w(TAG, msg); |
| } |
| } |