package com.android.server.hdmi; /* * 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. */ import android.hardware.hdmi.HdmiControlManager; import android.hardware.hdmi.HdmiPlaybackClient; import android.hardware.hdmi.HdmiPlaybackClient.DisplayStatusCallback; import android.hardware.hdmi.IHdmiControlCallback; import android.os.RemoteException; import android.util.Slog; import java.util.ArrayList; import java.util.List; /** * Feature action that queries the power status of other device. This action is initiated via * {@link HdmiPlaybackClient#queryDisplayStatus(DisplayStatusCallback)} from the Android system * working as playback device to get the power status of TV device. *

* Package-private, accessed by {@link HdmiControlService} only. */ final class DevicePowerStatusAction extends HdmiCecFeatureAction { private static final String TAG = "DevicePowerStatusAction"; // State in which the action is waiting for . private static final int STATE_WAITING_FOR_REPORT_POWER_STATUS = 1; private final int mTargetAddress; private final List mCallbacks = new ArrayList<>(); static DevicePowerStatusAction create(HdmiCecLocalDevice source, int targetAddress, IHdmiControlCallback callback) { if (source == null || callback == null) { Slog.e(TAG, "Wrong arguments"); return null; } return new DevicePowerStatusAction(source, targetAddress, callback); } private DevicePowerStatusAction(HdmiCecLocalDevice localDevice, int targetAddress, IHdmiControlCallback callback) { super(localDevice); mTargetAddress = targetAddress; addCallback(callback); } @Override boolean start() { queryDevicePowerStatus(); mState = STATE_WAITING_FOR_REPORT_POWER_STATUS; addTimer(mState, HdmiConfig.TIMEOUT_MS); return true; } private void queryDevicePowerStatus() { sendCommand(HdmiCecMessageBuilder.buildGiveDevicePowerStatus(getSourceAddress(), mTargetAddress)); } @Override boolean processCommand(HdmiCecMessage cmd) { if (mState != STATE_WAITING_FOR_REPORT_POWER_STATUS || mTargetAddress != cmd.getSource()) { return false; } if (cmd.getOpcode() == Constants.MESSAGE_REPORT_POWER_STATUS) { int status = cmd.getParams()[0]; invokeCallback(status); finish(); return true; } return false; } @Override void handleTimerEvent(int state) { if (mState != state) { return; } if (state == STATE_WAITING_FOR_REPORT_POWER_STATUS) { // Got no response from TV. Report status 'unknown'. invokeCallback(HdmiControlManager.POWER_STATUS_UNKNOWN); finish(); } } public void addCallback(IHdmiControlCallback callback) { mCallbacks.add(callback); } private void invokeCallback(int result) { try { for (IHdmiControlCallback callback : mCallbacks) { callback.onComplete(result); } } catch (RemoteException e) { Slog.e(TAG, "Callback failed:" + e); } } }