| /* |
| * 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.HdmiControlManager; |
| import android.hardware.hdmi.IHdmiControlCallback; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| /** |
| * Feature action for routing control. Exchanges routing-related commands with other devices |
| * to determine the new active source. |
| * |
| * <p>This action is initiated by various cases: |
| * <ul> |
| * <li> Manual TV input switching |
| * <li> Routing change of a CEC switch other than TV |
| * <li> New CEC device at the tail of the active routing path |
| * <li> Removed CEC device from the active routing path |
| * <li> Routing at CEC enable time |
| * </ul> |
| */ |
| final class RoutingControlAction extends HdmiCecFeatureAction { |
| private static final String TAG = "RoutingControlAction"; |
| |
| // State in which we wait for <Routing Information> to arrive. If timed out, we use the |
| // latest routing path to set the new active source. |
| @VisibleForTesting |
| static final int STATE_WAIT_FOR_ROUTING_INFORMATION = 1; |
| |
| // Time out in millseconds used for <Routing Information> |
| private static final int TIMEOUT_ROUTING_INFORMATION_MS = 1000; |
| |
| // If set to true, call {@link HdmiControlService#invokeInputChangeListener()} when |
| // the routing control/active source change happens. The listener should be called if |
| // the events are triggered by external events such as manual switch port change or incoming |
| // <Inactive Source> command. |
| private final boolean mNotifyInputChange; |
| |
| // The latest routing path. Updated by each <Routing Information> from CEC switches. |
| private int mCurrentRoutingPath; |
| |
| RoutingControlAction(HdmiCecLocalDevice localDevice, int path, IHdmiControlCallback callback) { |
| super(localDevice, callback); |
| mCurrentRoutingPath = path; |
| // Callback is non-null when routing control action is brought up by binder API. Use |
| // this as an indicator for the input change notification. These API calls will get |
| // the result through this callback, not through notification. Any other events that |
| // trigger the routing control is external, for which notifcation is used. |
| mNotifyInputChange = (callback == null); |
| } |
| |
| @Override |
| public boolean start() { |
| mState = STATE_WAIT_FOR_ROUTING_INFORMATION; |
| addTimer(mState, TIMEOUT_ROUTING_INFORMATION_MS); |
| return true; |
| } |
| |
| @Override |
| public boolean processCommand(HdmiCecMessage cmd) { |
| int opcode = cmd.getOpcode(); |
| byte[] params = cmd.getParams(); |
| if (mState == STATE_WAIT_FOR_ROUTING_INFORMATION |
| && opcode == Constants.MESSAGE_ROUTING_INFORMATION) { |
| // Keep updating the physicalAddress as we receive <Routing Information>. |
| // If the routing path doesn't belong to the currently active one, we should |
| // ignore it since it might have come from other routing change sequence. |
| int routingPath = HdmiUtils.twoBytesToInt(params); |
| if (!HdmiUtils.isInActiveRoutingPath(mCurrentRoutingPath, routingPath)) { |
| return true; |
| } |
| mCurrentRoutingPath = routingPath; |
| // Stop possible previous routing change sequence if in progress. |
| removeActionExcept(RoutingControlAction.class, this); |
| addTimer(mState, TIMEOUT_ROUTING_INFORMATION_MS); |
| return true; |
| } |
| return false; |
| } |
| |
| private void updateActiveInput() { |
| HdmiCecLocalDeviceTv tv = tv(); |
| tv.setPrevPortId(tv.getActivePortId()); |
| tv.updateActiveInput(mCurrentRoutingPath, mNotifyInputChange); |
| } |
| |
| private void sendSetStreamPath() { |
| sendCommand(HdmiCecMessageBuilder.buildSetStreamPath(getSourceAddress(), |
| mCurrentRoutingPath)); |
| } |
| |
| @Override |
| public void handleTimerEvent(int timeoutState) { |
| if (mState != timeoutState || mState == STATE_NONE) { |
| Slog.w("CEC", "Timer in a wrong state. Ignored."); |
| return; |
| } |
| switch (timeoutState) { |
| case STATE_WAIT_FOR_ROUTING_INFORMATION: |
| updateActiveInput(); |
| sendSetStreamPath(); |
| finishWithCallback(HdmiControlManager.RESULT_SUCCESS); |
| return; |
| default: |
| Slog.e("CEC", "Invalid timeoutState (" + timeoutState + ")."); |
| return; |
| } |
| } |
| } |