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/*
* 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 static android.hardware.hdmi.HdmiControlManager.POWER_STATUS_UNKNOWN;
import android.hardware.hdmi.HdmiDeviceInfo;
import android.util.SparseIntArray;
import com.android.server.hdmi.HdmiControlService.SendMessageCallback;
import java.util.List;
/**
* Action that check each device's power status.
*/
public class PowerStatusMonitorAction extends HdmiCecFeatureAction {
private static final String TAG = "PowerStatusMonitorAction";
// State that waits for <Report Power Status> once sending <Give Device Power Status>
// to all external devices.
private static final int STATE_WAIT_FOR_REPORT_POWER_STATUS = 1;
// State that waits for next monitoring
private static final int STATE_WAIT_FOR_NEXT_MONITORING = 2;
private static final int INVALID_POWER_STATUS = POWER_STATUS_UNKNOWN - 1;
// Monitoring interval (60s)
private static final int MONITIROING_INTERNAL_MS = 60000;
// Timeout once sending <Give Device Power Status>
private static final int REPORT_POWER_STATUS_TIMEOUT_MS = 5000;
// Container for current power status of all external devices.
// The key is a logical address a device and the value is current power status of it
// Whenever the action receives <Report Power Status> from a device,
// it removes an entry of the given device.
// If this is non-empty when timeout for STATE_WAIT_FOR_REPORT_POWER_STATUS happens,
// updates power status of all remaining devices into POWER_STATUS_UNKNOWN.
private final SparseIntArray mPowerStatus = new SparseIntArray();
PowerStatusMonitorAction(HdmiCecLocalDevice source) {
super(source);
}
@Override
boolean start() {
queryPowerStatus();
return true;
}
@Override
boolean processCommand(HdmiCecMessage cmd) {
if (mState != STATE_WAIT_FOR_REPORT_POWER_STATUS) {
return false;
}
return handleReportPowerStatus(cmd);
}
private boolean handleReportPowerStatus(HdmiCecMessage cmd) {
int sourceAddress = cmd.getSource();
int oldStatus = mPowerStatus.get(sourceAddress, INVALID_POWER_STATUS);
if (oldStatus == INVALID_POWER_STATUS) {
// if no device exists for incoming message, hands it over to other actions.
return false;
}
int newStatus = cmd.getParams()[0] & 0xFF;
updatePowerStatus(sourceAddress, newStatus, true);
return true;
}
@Override
void handleTimerEvent(int state) {
switch (mState) {
case STATE_WAIT_FOR_NEXT_MONITORING:
queryPowerStatus();
break;
case STATE_WAIT_FOR_REPORT_POWER_STATUS:
handleTimeout();
break;
}
}
private void handleTimeout() {
for (int i = 0; i < mPowerStatus.size(); ++i) {
int logicalAddress = mPowerStatus.keyAt(i);
updatePowerStatus(logicalAddress, POWER_STATUS_UNKNOWN, false);
}
mPowerStatus.clear();
mState = STATE_WAIT_FOR_NEXT_MONITORING;
}
private void resetPowerStatus(List<HdmiDeviceInfo> deviceInfos) {
mPowerStatus.clear();
for (HdmiDeviceInfo info : deviceInfos) {
mPowerStatus.append(info.getLogicalAddress(), info.getDevicePowerStatus());
}
}
private void queryPowerStatus() {
List<HdmiDeviceInfo> deviceInfos = tv().getDeviceInfoList(false);
resetPowerStatus(deviceInfos);
for (HdmiDeviceInfo info : deviceInfos) {
final int logicalAddress = info.getLogicalAddress();
sendCommand(HdmiCecMessageBuilder.buildGiveDevicePowerStatus(getSourceAddress(),
logicalAddress),
new SendMessageCallback() {
@Override
public void onSendCompleted(int error) {
// If fails to send <Give Device Power Status>,
// update power status into UNKNOWN.
if (error != Constants.SEND_RESULT_SUCCESS) {
updatePowerStatus(logicalAddress, POWER_STATUS_UNKNOWN, true);
}
}
});
}
mState = STATE_WAIT_FOR_REPORT_POWER_STATUS;
// Add both timers, monitoring and timeout.
addTimer(STATE_WAIT_FOR_NEXT_MONITORING, MONITIROING_INTERNAL_MS);
addTimer(STATE_WAIT_FOR_REPORT_POWER_STATUS, REPORT_POWER_STATUS_TIMEOUT_MS);
}
private void updatePowerStatus(int logicalAddress, int newStatus, boolean remove) {
tv().updateDevicePowerStatus(logicalAddress, newStatus);
if (remove) {
mPowerStatus.delete(logicalAddress);
}
}
}
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