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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 android.hardware.hdmi.HdmiDeviceInfo;
import android.util.Slog;
/**
* Feature action that handles enabling/disabling of ARC transmission channel.
* Once TV gets <Initiate ARC>, TV sends <Report ARC Initiated> to AV Receiver.
* If it fails or it gets <Terminate ARC>, TV just disables ARC.
*/
final class SetArcTransmissionStateAction extends HdmiCecFeatureAction {
private static final String TAG = "SetArcTransmissionStateAction";
// State in which the action sent <Rerpot Arc Initiated> and
// is waiting for time out. If it receives <Feature Abort> within timeout
// ARC should be disabled.
private static final int STATE_WAITING_TIMEOUT = 1;
private final boolean mEnabled;
private final int mAvrAddress;
/**
* @Constructor
*
* @param source {@link HdmiCecLocalDevice} instance
* @param enabled whether to enable ARC Transmission channel
*/
SetArcTransmissionStateAction(HdmiCecLocalDevice source, int avrAddress,
boolean enabled) {
super(source);
HdmiUtils.verifyAddressType(getSourceAddress(), HdmiDeviceInfo.DEVICE_TV);
HdmiUtils.verifyAddressType(avrAddress, HdmiDeviceInfo.DEVICE_AUDIO_SYSTEM);
mAvrAddress = avrAddress;
mEnabled = enabled;
}
@Override
boolean start() {
if (mEnabled) {
// Enable ARC status immediately after sending <Report Arc Initiated>.
// If AVR responds with <Feature Abort>, disable ARC status again.
// This is different from spec that says that turns ARC status to
// "Enabled" if <Report ARC Initiated> is acknowledged and no
// <Feature Abort> is received.
// But implemented this way to save the time having to wait for
// <Feature Abort>.
setArcStatus(true);
// If succeeds to send <Report ARC Initiated>, wait general timeout
// to check whether there is no <Feature Abort> for <Report ARC Initiated>.
mState = STATE_WAITING_TIMEOUT;
addTimer(mState, HdmiConfig.TIMEOUT_MS);
sendReportArcInitiated();
} else {
setArcStatus(false);
finish();
}
return true;
}
private void sendReportArcInitiated() {
HdmiCecMessage command =
HdmiCecMessageBuilder.buildReportArcInitiated(getSourceAddress(), mAvrAddress);
sendCommand(command, new HdmiControlService.SendMessageCallback() {
@Override
public void onSendCompleted(int error) {
if (error != Constants.SEND_RESULT_SUCCESS) {
// If fails to send <Report ARC Initiated>, disable ARC and
// send <Report ARC Terminated> directly.
setArcStatus(false);
HdmiLogger.debug("Failed to send <Report Arc Initiated>.");
finish();
}
}
});
}
private void setArcStatus(boolean enabled) {
boolean wasEnabled = tv().setArcStatus(enabled);
Slog.i(TAG, "Change arc status [old:" + wasEnabled + ", new:" + enabled + "]");
// If enabled before and set to "disabled" and send <Report Arc Terminated> to
// av reciever.
if (!enabled && wasEnabled) {
sendCommand(HdmiCecMessageBuilder.buildReportArcTerminated(getSourceAddress(),
mAvrAddress));
}
}
@Override
boolean processCommand(HdmiCecMessage cmd) {
if (mState != STATE_WAITING_TIMEOUT) {
return false;
}
int opcode = cmd.getOpcode();
if (opcode == Constants.MESSAGE_FEATURE_ABORT) {
int originalOpcode = cmd.getParams()[0] & 0xFF;
if (originalOpcode == Constants.MESSAGE_REPORT_ARC_INITIATED) {
HdmiLogger.debug("Feature aborted for <Report Arc Initiated>");
setArcStatus(false);
finish();
return true;
}
}
return false;
}
@Override
void handleTimerEvent(int state) {
if (mState != state || mState != STATE_WAITING_TIMEOUT) {
return;
}
// Expire timeout for <Feature Abort>.
finish();
}
}
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