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SetArcTransmissionStateAction.javaAPI DocAndroid 5.1 API4971Thu Mar 12 22:22:42 GMT 2015com.android.server.hdmi

SetArcTransmissionStateAction

public final class SetArcTransmissionStateAction extends HdmiCecFeatureAction
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.

Fields Summary
private static final String
TAG
private static final int
STATE_WAITING_TIMEOUT
private final boolean
mEnabled
private final int
mAvrAddress
Constructors Summary
SetArcTransmissionStateAction(HdmiCecLocalDevice source, int avrAddress, boolean enabled)

Constructor
param
source {@link HdmiCecLocalDevice} instance
param
enabled whether to enable ARC Transmission channel


                       
       
              
        super(source);
        HdmiUtils.verifyAddressType(getSourceAddress(), HdmiDeviceInfo.DEVICE_TV);
        HdmiUtils.verifyAddressType(avrAddress, HdmiDeviceInfo.DEVICE_AUDIO_SYSTEM);
        mAvrAddress = avrAddress;
        mEnabled = enabled;
Methods Summary
voidhandleTimerEvent(int state)

        if (mState != state || mState != STATE_WAITING_TIMEOUT) {
            return;
        }
        // Expire timeout for <Feature Abort>.
        finish();
booleanprocessCommand(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;
private voidsendReportArcInitiated()

        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 voidsetArcStatus(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));
        }
booleanstart()

        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;