UAS.cc

            if (static_cast<uint16_t>(channels.chan3_scaled) != UINT16_MAX)
                emit remoteControlChannelScaledChanged(channels.port * portWidth + 2, channels.chan3_scaled/10000.0f);
            if (static_cast<uint16_t>(channels.chan4_scaled) != UINT16_MAX)
                emit remoteControlChannelScaledChanged(channels.port * portWidth + 3, channels.chan4_scaled/10000.0f);
            if (static_cast<uint16_t>(channels.chan5_scaled) != UINT16_MAX)
                emit remoteControlChannelScaledChanged(channels.port * portWidth + 4, channels.chan5_scaled/10000.0f);
            if (static_cast<uint16_t>(channels.chan6_scaled) != UINT16_MAX)
                emit remoteControlChannelScaledChanged(channels.port * portWidth + 5, channels.chan6_scaled/10000.0f);
            if (static_cast<uint16_t>(channels.chan7_scaled) != UINT16_MAX)
                emit remoteControlChannelScaledChanged(channels.port * portWidth + 6, channels.chan7_scaled/10000.0f);
            if (static_cast<uint16_t>(channels.chan8_scaled) != UINT16_MAX)
                emit remoteControlChannelScaledChanged(channels.port * portWidth + 7, channels.chan8_scaled/10000.0f);
        }
            break;
        case MAVLINK_MSG_ID_PARAM_VALUE:
        {
            mavlink_param_value_t rawValue;
            mavlink_msg_param_value_decode(&message, &rawValue);
            QByteArray bytes(rawValue.param_id, MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN);
            // Construct a string stopping at the first NUL (0) character, else copy the whole
            // byte array (max MAVLINK_MSG_PARAM_VALUE_FIELD_PARAM_ID_LEN, so safe)
            QString parameterName(bytes);
            mavlink_param_union_t paramVal;
            paramVal.param_float = rawValue.param_value;
            paramVal.type = rawValue.param_type;

            processParamValueMsg(message, parameterName,rawValue,paramVal);
         }
            break;
        case MAVLINK_MSG_ID_COMMAND_ACK:
        {
            mavlink_command_ack_t ack;
            mavlink_msg_command_ack_decode(&message, &ack);
            switch (ack.result)
            {
            case MAV_RESULT_ACCEPTED:
            {
                emit textMessageReceived(uasId, message.compid, MAV_SEVERITY_INFO, tr("SUCCESS: Executed CMD: %1").arg(ack.command));
            }
                break;
            case MAV_RESULT_TEMPORARILY_REJECTED:
            {
                emit textMessageReceived(uasId, message.compid, MAV_SEVERITY_WARNING, tr("FAILURE: Temporarily rejected CMD: %1").arg(ack.command));
            }
                break;
            case MAV_RESULT_DENIED:
            {
                emit textMessageReceived(uasId, message.compid, MAV_SEVERITY_ERROR, tr("FAILURE: Denied CMD: %1").arg(ack.command));
            }
                break;
            case MAV_RESULT_UNSUPPORTED:
            {
                emit textMessageReceived(uasId, message.compid, MAV_SEVERITY_WARNING, tr("FAILURE: Unsupported CMD: %1").arg(ack.command));
            }
                break;
            case MAV_RESULT_FAILED:
            {
                emit textMessageReceived(uasId, message.compid, MAV_SEVERITY_ERROR, tr("FAILURE: Failed CMD: %1").arg(ack.command));
            }
                break;
            }
        }
        case MAVLINK_MSG_ID_ATTITUDE_TARGET:
        {
            mavlink_attitude_target_t out;
            mavlink_msg_attitude_target_decode(&message, &out);
            float roll, pitch, yaw;
            mavlink_quaternion_to_euler(out.q, &roll, &pitch, &yaw);
            quint64 time = getUnixTimeFromMs(out.time_boot_ms);
            emit attitudeThrustSetPointChanged(this, roll, pitch, yaw, out.thrust, time);

            // For plotting emit roll sp, pitch sp and yaw sp values
            emit valueChanged(uasId, "roll sp", "rad", roll, time);
            emit valueChanged(uasId, "pitch sp", "rad", pitch, time);
            emit valueChanged(uasId, "yaw sp", "rad", yaw, time);
        }
            break;
        case MAVLINK_MSG_ID_MISSION_COUNT:
        {
            mavlink_mission_count_t mc;
            mavlink_msg_mission_count_decode(&message, &mc);

            // Special case a 0 for the target system or component, it means that anyone is the target, so we should process this.
            if (mc.target_system == 0) {
                mc.target_system = mavlink->getSystemId();
            }
            if (mc.target_component == 0) {
                mc.target_component = mavlink->getComponentId();
            }

            // Check that this message applies to the UAS.
            if(mc.target_system == mavlink->getSystemId())
            {

                if (mc.target_component != mavlink->getComponentId()) {
                    qDebug() << "The target component ID is not set correctly. This is currently only a warning, but will be turned into an error.";
                    qDebug() << "Expecting" << mavlink->getComponentId() << "but got" << mc.target_component;
                }

                waypointManager.handleWaypointCount(message.sysid, message.compid, mc.count);
            }
            else
            {
                qDebug() << QString("Received mission count message, but was wrong system id. Expected %1, received %2").arg(mavlink->getSystemId()).arg(mc.target_system);
            }
        }
            break;

        case MAVLINK_MSG_ID_MISSION_ITEM:
        {
            mavlink_mission_item_t mi;
            mavlink_msg_mission_item_decode(&message, &mi);

            // Special case a 0 for the target system or component, it means that anyone is the target, so we should process this.
            if (mi.target_system == 0) {
                mi.target_system = mavlink->getSystemId();
            }
            if (mi.target_component == 0) {
                mi.target_component = mavlink->getComponentId();
            }

            // Check that the item pertains to this UAS.
            if(mi.target_system == mavlink->getSystemId())
            {

                if (mi.target_component != mavlink->getComponentId()) {
                    qDebug() << "The target component ID is not set correctly. This is currently only a warning, but will be turned into an error.";
                    qDebug() << "Expecting" << mavlink->getComponentId() << "but got" << mi.target_component;
                }

                waypointManager.handleWaypoint(message.sysid, message.compid, &mi);
            }
            else
            {
                qDebug() << QString("Received mission item message, but was wrong system id. Expected %1, received %2").arg(mavlink->getSystemId()).arg(mi.target_system);
            }
        }
            break;

        case MAVLINK_MSG_ID_MISSION_ACK:
        {
            mavlink_mission_ack_t ma;
            mavlink_msg_mission_ack_decode(&message, &ma);

            // Special case a 0 for the target system or component, it means that anyone is the target, so we should process this.
            if (ma.target_system == 0) {
                ma.target_system = mavlink->getSystemId();
            }
            if (ma.target_component == 0) {
                ma.target_component = mavlink->getComponentId();
            }

            // Check that the ack pertains to this UAS.
            if(ma.target_system == mavlink->getSystemId())
            {

                if (ma.target_component != mavlink->getComponentId()) {
                    qDebug() << tr("The target component ID is not set correctly. This is currently only a warning, but will be turned into an error.");
                    qDebug() << "Expecting" << mavlink->getComponentId() << "but got" << ma.target_component;
                }

                waypointManager.handleWaypointAck(message.sysid, message.compid, &ma);
            }
            else
            {
                qDebug() << QString("Received mission ack message, but was wrong system id. Expected %1, received %2").arg(mavlink->getSystemId()).arg(ma.target_system);
            }
        }
            break;

        case MAVLINK_MSG_ID_MISSION_REQUEST:
        {
            mavlink_mission_request_t mr;
            mavlink_msg_mission_request_decode(&message, &mr);

            // Special case a 0 for the target system or component, it means that anyone is the target, so we should process this.
            if (mr.target_system == 0) {
                mr.target_system = mavlink->getSystemId();
            }
            if (mr.target_component == 0) {
                mr.target_component = mavlink->getComponentId();
            }

            // Check that the request pertains to this UAS.
            if(mr.target_system == mavlink->getSystemId())
            {

                if (mr.target_component != mavlink->getComponentId()) {
                    qDebug() << QString("The target component ID is not set correctly. This is currently only a warning, but will be turned into an error.");
                    qDebug() << "Expecting" << mavlink->getComponentId() << "but got" << mr.target_component;
                }

                waypointManager.handleWaypointRequest(message.sysid, message.compid, &mr);
            }
            else
            {
                qDebug() << QString("Received mission request message, but was wrong system id. Expected %1, received %2").arg(mavlink->getSystemId()).arg(mr.target_system);
            }
        }
            break;

        case MAVLINK_MSG_ID_MISSION_ITEM_REACHED:
        {
            mavlink_mission_item_reached_t wpr;
            mavlink_msg_mission_item_reached_decode(&message, &wpr);
            waypointManager.handleWaypointReached(message.sysid, message.compid, &wpr);
            QString text = QString("System %1 reached waypoint %2").arg(getUASID()).arg(wpr.seq);
            GAudioOutput::instance()->say(text);
            emit textMessageReceived(message.sysid, message.compid, MAV_SEVERITY_INFO, text);
        }
            break;

        case MAVLINK_MSG_ID_MISSION_CURRENT:
        {
            mavlink_mission_current_t wpc;
            mavlink_msg_mission_current_decode(&message, &wpc);
            waypointManager.handleWaypointCurrent(message.sysid, message.compid, &wpc);
        }
            break;

        case MAVLINK_MSG_ID_POSITION_TARGET_LOCAL_NED:
        {
            if (multiComponentSourceDetected && wrongComponent)
            {
                break;
            }
            mavlink_position_target_local_ned_t p;
            mavlink_msg_position_target_local_ned_decode(&message, &p);
            quint64 time = getUnixTimeFromMs(p.time_boot_ms);
            emit positionSetPointsChanged(uasId, p.x, p.y, p.z, 0/* XXX remove yaw and move it to attitude */, time);
        }
            break;
        case MAVLINK_MSG_ID_SET_POSITION_TARGET_LOCAL_NED:
        {
            mavlink_set_position_target_local_ned_t p;
            mavlink_msg_set_position_target_local_ned_decode(&message, &p);
            emit userPositionSetPointsChanged(uasId, p.x, p.y, p.z, 0/* XXX remove yaw and move it to attitude */);
        }
            break;
        case MAVLINK_MSG_ID_STATUSTEXT:
        {
            QByteArray b;
            b.resize(MAVLINK_MSG_STATUSTEXT_FIELD_TEXT_LEN+1);
            mavlink_msg_statustext_get_text(&message, b.data());
 
            // Ensure NUL-termination
            b[b.length()-1] = '\0';
            QString text = QString(b);
            int severity = mavlink_msg_statustext_get_severity(&message);

	    // If the message is NOTIFY or higher severity, or starts with a '#',
	    // then read it aloud.
            if (text.startsWith("#") || severity <= MAV_SEVERITY_NOTICE)
            {
                text.remove("#");
                emit textMessageReceived(uasId, message.compid, severity, text);
                GAudioOutput::instance()->say(text.toLower(), severity);
            }
            else
            {
                emit textMessageReceived(uasId, message.compid, severity, text);
            }
        }
            break;
#if 0
        case MAVLINK_MSG_ID_SERVO_OUTPUT_RAW:
        {
            mavlink_servo_output_raw_t raw;
            mavlink_msg_servo_output_raw_decode(&message, &raw);

            if (hilEnabled && raw.port == 0)
            {
                emit hilActuatorsChanged(static_cast<uint64_t>(getUnixTimeFromMs(raw.time_usec)), static_cast<float>(raw.servo1_raw),
                                     static_cast<float>(raw.servo2_raw), static_cast<float>(raw.servo3_raw),
                                     static_cast<float>(raw.servo4_raw), static_cast<float>(raw.servo5_raw), static_cast<float>(raw.servo6_raw),
                                     static_cast<float>(raw.servo7_raw), static_cast<float>(raw.servo8_raw));
            }
        }
        break;
#endif

        case MAVLINK_MSG_ID_DATA_TRANSMISSION_HANDSHAKE:
        {
            mavlink_data_transmission_handshake_t p;
            mavlink_msg_data_transmission_handshake_decode(&message, &p);
            imageSize = p.size;
            imagePackets = p.packets;
            imagePayload = p.payload;
            imageQuality = p.jpg_quality;
            imageType = p.type;
            imageWidth = p.width;
            imageHeight = p.height;
            imageStart = QGC::groundTimeMilliseconds();
            imagePacketsArrived = 0;

        }
            break;

        case MAVLINK_MSG_ID_ENCAPSULATED_DATA:
        {
            mavlink_encapsulated_data_t img;
            mavlink_msg_encapsulated_data_decode(&message, &img);
            int seq = img.seqnr;
            int pos = seq * imagePayload;

            // Check if we have a valid transaction
            if (imagePackets == 0)
            {
                // NO VALID TRANSACTION - ABORT
                // Restart statemachine
                imagePacketsArrived = 0;
                break;
            }

            for (int i = 0; i < imagePayload; ++i)
            {
                if (pos <= imageSize) {
                    imageRecBuffer[pos] = img.data[i];
                }
                ++pos;
            }

            ++imagePacketsArrived;

            // emit signal if all packets arrived
            if (imagePacketsArrived >= imagePackets)
            {
                // Restart statemachine
                imagePackets = 0;
                imagePacketsArrived = 0;
                emit imageReady(this);
            }
        }
            break;

        case MAVLINK_MSG_ID_NAV_CONTROLLER_OUTPUT:
        {
            mavlink_nav_controller_output_t p;
            mavlink_msg_nav_controller_output_decode(&message,&p);
            setDistToWaypoint(p.wp_dist);
            setBearingToWaypoint(p.nav_bearing);
            emit navigationControllerErrorsChanged(this, p.alt_error, p.aspd_error, p.xtrack_error);
            emit NavigationControllerDataChanged(this, p.nav_roll, p.nav_pitch, p.nav_bearing, p.target_bearing, p.wp_dist);
        }
            break;
        // Messages to ignore
        case MAVLINK_MSG_ID_RAW_IMU:
        case MAVLINK_MSG_ID_SCALED_IMU:
        case MAVLINK_MSG_ID_RAW_PRESSURE:
        case MAVLINK_MSG_ID_SCALED_PRESSURE:
        case MAVLINK_MSG_ID_OPTICAL_FLOW:
        case MAVLINK_MSG_ID_DEBUG_VECT:
        case MAVLINK_MSG_ID_DEBUG:
        case MAVLINK_MSG_ID_NAMED_VALUE_FLOAT:
        case MAVLINK_MSG_ID_NAMED_VALUE_INT:
        case MAVLINK_MSG_ID_MANUAL_CONTROL:
        case MAVLINK_MSG_ID_HIGHRES_IMU:
        case MAVLINK_MSG_ID_DISTANCE_SENSOR:
            break;
        default:
        {
            if (!unknownPackets.contains(message.msgid))
            {
                unknownPackets.append(message.msgid);

                emit unknownPacketReceived(uasId, message.compid, message.msgid);
                qDebug() << "Unknown message from system:" << uasId << "message:" << message.msgid;
            }
        }
            break;
        }
    }
}

/**
* Set the home position of the UAS.
* @param lat The latitude fo the home position
* @param lon The longitude of the home position
* @param alt The altitude of the home position
*/
void UAS::setHomePosition(double lat, double lon, double alt)
{
    if (blockHomePositionChanges)
        return;

    QString uasName = (getUASName() == "")?
                tr("UAS") + QString::number(getUASID())
              : getUASName();

    QMessageBox::StandardButton button = QGCMessageBox::question(tr("Set a new home position for vehicle %1").arg(uasName),
                                                                 tr("Do you want to set a new origin? Waypoints defined in the local frame will be shifted in their physical location"),
                                                                 QMessageBox::Yes | QMessageBox::Cancel,
                                                                 QMessageBox::Cancel);
    if (button == QMessageBox::Yes)
    {
        mavlink_message_t msg;
        mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, this->getUASID(), 0, MAV_CMD_DO_SET_HOME, 1, 0, 0, 0, 0, lat, lon, alt);
        // Send message twice to increase chance that it reaches its goal
        sendMessage(msg);

        // Send new home position to UAS
        mavlink_set_gps_global_origin_t home;
        home.target_system = uasId;
        home.latitude = lat*1E7;
        home.longitude = lon*1E7;
        home.altitude = alt*1000;
        qDebug() << "lat:" << home.latitude << " lon:" << home.longitude;
        mavlink_msg_set_gps_global_origin_encode(mavlink->getSystemId(), mavlink->getComponentId(), &msg, &home);
        sendMessage(msg);
    } else {
        blockHomePositionChanges = true;
    }
}

/**
* Set the origin to the current GPS location.
**/
void UAS::setLocalOriginAtCurrentGPSPosition()
{
    QMessageBox::StandardButton button = QGCMessageBox::question(tr("Set the home position at the current GPS position?"),
                                                                 tr("Do you want to set a new origin? Waypoints defined in the local frame will be shifted in their physical location"),
                                                                 QMessageBox::Yes | QMessageBox::Cancel,
                                                                 QMessageBox::Cancel);
    if (button == QMessageBox::Yes)
    {
        mavlink_message_t msg;
        mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, this->getUASID(), 0, MAV_CMD_DO_SET_HOME, 1, 1, 0, 0, 0, 0, 0, 0);
        // Send message twice to increase chance that it reaches its goal
        sendMessage(msg);
    }
}

/**
* Set a local position setpoint.
* @param x postion
* @param y position
* @param z position
*/
void UAS::setLocalPositionSetpoint(float x, float y, float z, float yaw)
{
    Q_UNUSED(x);
    Q_UNUSED(y);
    Q_UNUSED(z);
    Q_UNUSED(yaw);
}

/**
* Set a offset of the local position.
* @param x position
* @param y position
* @param z position
* @param yaw
*/
void UAS::setLocalPositionOffset(float x, float y, float z, float yaw)
{
    Q_UNUSED(x);
    Q_UNUSED(y);
    Q_UNUSED(z);
    Q_UNUSED(yaw);
}

void UAS::startRadioControlCalibration(int param)
{
    mavlink_message_t msg;
    // Param 1: gyro cal, param 2: mag cal, param 3: pressure cal, Param 4: radio
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, 0, MAV_CMD_PREFLIGHT_CALIBRATION, 1, 0, 0, 0, param, 0, 0, 0);
    sendMessage(msg);
}

void UAS::endRadioControlCalibration()
{
    mavlink_message_t msg;
    // Param 1: gyro cal, param 2: mag cal, param 3: pressure cal, Param 4: radio
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, 0, MAV_CMD_PREFLIGHT_CALIBRATION, 1, 0, 0, 0, 0, 0, 0, 0);
    sendMessage(msg);
}

void UAS::startDataRecording()
{
    mavlink_message_t msg;
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, 0, MAV_CMD_DO_CONTROL_VIDEO, 1, -1, -1, -1, 2, 0, 0, 0);
    sendMessage(msg);
}

void UAS::stopDataRecording()
{
    mavlink_message_t msg;
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, 0, MAV_CMD_DO_CONTROL_VIDEO, 1, -1, -1, -1, 0, 0, 0, 0);
    sendMessage(msg);
}

void UAS::startMagnetometerCalibration()
{
    mavlink_message_t msg;
    // Param 1: gyro cal, param 2: mag cal, param 3: pressure cal, Param 4: radio
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, MAV_COMP_ID_IMU, MAV_CMD_PREFLIGHT_CALIBRATION, 1, 0, 1, 0, 0, 0, 0, 0);
    sendMessage(msg);
}

void UAS::startGyroscopeCalibration()
{
    mavlink_message_t msg;
    // Param 1: gyro cal, param 2: mag cal, param 3: pressure cal, Param 4: radio
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, MAV_COMP_ID_IMU, MAV_CMD_PREFLIGHT_CALIBRATION, 1, 1, 0, 0, 0, 0, 0, 0);
    sendMessage(msg);
}

void UAS::startPressureCalibration()
{
    mavlink_message_t msg;
    // Param 1: gyro cal, param 2: mag cal, param 3: pressure cal, Param 4: radio
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, MAV_COMP_ID_IMU, MAV_CMD_PREFLIGHT_CALIBRATION, 1, 0, 0, 1, 0, 0, 0, 0);
    sendMessage(msg);
}

/**
* Check if time is smaller than 40 years, assuming no system without Unix
* timestamp runs longer than 40 years continuously without reboot. In worst case
* this will add/subtract the communication delay between GCS and MAV, it will
* never alter the timestamp in a safety critical way.
*/
quint64 UAS::getUnixReferenceTime(quint64 time)
{
    // Same as getUnixTime, but does not react to attitudeStamped mode
    if (time == 0)
    {
        //        qDebug() << "XNEW time:" <<QGC::groundTimeMilliseconds();
        return QGC::groundTimeMilliseconds();
    }
    // Check if time is smaller than 40 years,
    // assuming no system without Unix timestamp
    // runs longer than 40 years continuously without
    // reboot. In worst case this will add/subtract the
    // communication delay between GCS and MAV,
    // it will never alter the timestamp in a safety
    // critical way.
    //
    // Calculation:
    // 40 years
    // 365 days
    // 24 hours
    // 60 minutes
    // 60 seconds
    // 1000 milliseconds
    // 1000 microseconds
#ifndef _MSC_VER
    else if (time < 1261440000000000LLU)
#else
    else if (time < 1261440000000000)
#endif
    {
        //        qDebug() << "GEN time:" << time/1000 + onboardTimeOffset;
        if (onboardTimeOffset == 0)
        {
            onboardTimeOffset = QGC::groundTimeMilliseconds() - time/1000;
        }
        return time/1000 + onboardTimeOffset;
    }
    else
    {
        // Time is not zero and larger than 40 years -> has to be
        // a Unix epoch timestamp. Do nothing.
        return time/1000;
    }
}

/**
* @warning If attitudeStamped is enabled, this function will not actually return
* the precise time stamp of this measurement augmented to UNIX time, but will
* MOVE the timestamp IN TIME to match the last measured attitude. There is no
* reason why one would want this, except for system setups where the onboard
* clock is not present or broken and datasets should be collected that are still
* roughly synchronized. PLEASE NOTE THAT ENABLING ATTITUDE STAMPED RUINS THE
* SCIENTIFIC NATURE OF THE CORRECT LOGGING FUNCTIONS OF QGROUNDCONTROL!
*/
quint64 UAS::getUnixTimeFromMs(quint64 time)
{
    return getUnixTime(time*1000);
}

/**
* @warning If attitudeStamped is enabled, this function will not actually return
* the precise time stam of this measurement augmented to UNIX time, but will
* MOVE the timestamp IN TIME to match the last measured attitude. There is no
* reason why one would want this, except for system setups where the onboard
* clock is not present or broken and datasets should be collected that are
* still roughly synchronized. PLEASE NOTE THAT ENABLING ATTITUDE STAMPED
* RUINS THE SCIENTIFIC NATURE OF THE CORRECT LOGGING FUNCTIONS OF QGROUNDCONTROL!
*/
quint64 UAS::getUnixTime(quint64 time)
{
    quint64 ret = 0;
    if (attitudeStamped)
    {
        ret = lastAttitude;
    }

    if (time == 0)
    {
        ret = QGC::groundTimeMilliseconds();
    }
    // Check if time is smaller than 40 years,
    // assuming no system without Unix timestamp
    // runs longer than 40 years continuously without
    // reboot. In worst case this will add/subtract the
    // communication delay between GCS and MAV,
    // it will never alter the timestamp in a safety
    // critical way.
    //
    // Calculation:
    // 40 years
    // 365 days
    // 24 hours
    // 60 minutes
    // 60 seconds
    // 1000 milliseconds
    // 1000 microseconds
#ifndef _MSC_VER
    else if (time < 1261440000000000LLU)
#else
    else if (time < 1261440000000000)
#endif
    {
        //        qDebug() << "GEN time:" << time/1000 + onboardTimeOffset;
        if (onboardTimeOffset == 0 || time < (lastNonNullTime - 100))
        {
            lastNonNullTime = time;
            onboardTimeOffset = QGC::groundTimeMilliseconds() - time/1000;
        }
        if (time > lastNonNullTime) lastNonNullTime = time;

        ret = time/1000 + onboardTimeOffset;
    }
    else
    {
        // Time is not zero and larger than 40 years -> has to be
        // a Unix epoch timestamp. Do nothing.
        ret = time/1000;
    }

    return ret;
}

/**
* @param component that will be searched for in the map of parameters.
*/
QList<QString> UAS::getParameterNames(int component)
{
    if (parameters.contains(component))
    {
        return parameters.value(component)->keys();
    }
    else
    {
        return QList<QString>();
    }
}

QList<int> UAS::getComponentIds()
{
    return parameters.keys();
}

/**
* @param newBaseMode that UAS is to be set to.
* @param newCustomMode that UAS is to be set to.
*/
void UAS::setMode(uint8_t newBaseMode, uint32_t newCustomMode)
{
    if (receivedMode)
    {
        //this->mode = mode; //no call assignament, update receive message from UAS

        // Strip armed / disarmed call for safety reasons, this is not relevant for setting the mode
        newBaseMode &= ~MAV_MODE_FLAG_SAFETY_ARMED;
        // Now set current state (request no change)
        newBaseMode |= this->base_mode & MAV_MODE_FLAG_SAFETY_ARMED;

//        // Strip HIL part, replace it with current system state
//        newBaseMode &= (~MAV_MODE_FLAG_HIL_ENABLED);
//        // Now set current state (request no change)
//        newBaseMode |= this->base_mode & MAV_MODE_FLAG_HIL_ENABLED;

        setModeArm(newBaseMode, newCustomMode);
    }
    else
    {
        qDebug() << "WARNING: setMode called before base_mode bitmask was received from UAS, new mode was not sent to system";
    }
}

/**
* @param newBaseMode that UAS is to be set to.
* @param newCustomMode that UAS is to be set to.
*/
void UAS::setModeArm(uint8_t newBaseMode, uint32_t newCustomMode)
{
    if (receivedMode)
    {
        mavlink_message_t msg;
        mavlink_msg_set_mode_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, (uint8_t)uasId, newBaseMode, newCustomMode);
        qDebug() << "mavlink_msg_set_mode_pack 1";
        sendMessage(msg);
        qDebug() << "SENDING REQUEST TO SET MODE TO SYSTEM" << uasId << ", MODE " << newBaseMode << " " << newCustomMode;
    }
    else
    {
        qDebug() << "WARNING: setModeArm called before base_mode bitmask was received from UAS, new mode was not sent to system";
    }
}

/**
* Send a message to every link that is connected.
* @param message that is to be sent
*/
void UAS::sendMessage(mavlink_message_t message)
{
    if (!LinkManager::instance())
    {
        qDebug() << "LINKMANAGER NOT AVAILABLE!";
        return;
    }

    if (_links.count() < 1) {
        qDebug() << "NO LINK AVAILABLE TO SEND!";
    }

    // Emit message on all links that are currently connected
    foreach (SharedLinkInterface sharedLink, _links) {
        LinkInterface* link = sharedLink.data();
        Q_ASSERT(link);
        
        if (link->isConnected()) {
            sendMessage(link, message);
        }
    }
}

/**
* Send a message to the link that is connected.
* @param link that the message will be sent to
* @message that is to be sent
*/
void UAS::sendMessage(LinkInterface* link, mavlink_message_t message)
{
    if(!link) return;
    // Create buffer
    uint8_t buffer[MAVLINK_MAX_PACKET_LEN];
    // Write message into buffer, prepending start sign
    int len = mavlink_msg_to_send_buffer(buffer, &message);
    static uint8_t messageKeys[256] = MAVLINK_MESSAGE_CRCS;
    mavlink_finalize_message_chan(&message, mavlink->getSystemId(), mavlink->getComponentId(), link->getId(), message.len, messageKeys[message.msgid]);

    // If link is connected
    if (link->isConnected())
    {
        // Send the portion of the buffer now occupied by the message
        link->writeBytes((const char*)buffer, len);
    }
    else
    {
        qDebug() << "LINK NOT CONNECTED, NOT SENDING!";
    }
}

/**
 * @param value battery voltage
 */
float UAS::filterVoltage(float value) const
{
    return lpVoltage * 0.6f + value * 0.4f;
}

/**
* Get the status of the code and a description of the status.
* Status can be unitialized, booting up, calibrating sensors, active
* standby, cirtical, emergency, shutdown or unknown.
*/
void UAS::getStatusForCode(int statusCode, QString& uasState, QString& stateDescription)
{
    switch (statusCode)
    {
    case MAV_STATE_UNINIT:
        uasState = tr("UNINIT");
        stateDescription = tr("Unitialized, booting up.");
        break;
    case MAV_STATE_BOOT:
        uasState = tr("BOOT");
        stateDescription = tr("Booting system, please wait.");
        break;
    case MAV_STATE_CALIBRATING:
        uasState = tr("CALIBRATING");
        stateDescription = tr("Calibrating sensors, please wait.");
        break;
    case MAV_STATE_ACTIVE:
        uasState = tr("ACTIVE");
        stateDescription = tr("Active, normal operation.");
        break;
    case MAV_STATE_STANDBY:
        uasState = tr("STANDBY");
        stateDescription = tr("Standby mode, ready for launch.");
        break;
    case MAV_STATE_CRITICAL:
        uasState = tr("CRITICAL");
        stateDescription = tr("FAILURE: Continuing operation.");
        break;
    case MAV_STATE_EMERGENCY:
        uasState = tr("EMERGENCY");
        stateDescription = tr("EMERGENCY: Land Immediately!");
        break;
        //case MAV_STATE_HILSIM:
        //uasState = tr("HIL SIM");
        //stateDescription = tr("HIL Simulation, Sensors read from SIM");
        //break;

    case MAV_STATE_POWEROFF:
        uasState = tr("SHUTDOWN");
        stateDescription = tr("Powering off system.");
        break;

    default:
        uasState = tr("UNKNOWN");
        stateDescription = tr("Unknown system state");
        break;
    }
}

QImage UAS::getImage()
{

//    qDebug() << "IMAGE TYPE:" << imageType;

    // RAW greyscale
    if (imageType == MAVLINK_DATA_STREAM_IMG_RAW8U)
    {
        int imgColors = 255;

        // Construct PGM header
        QString header("P5\n%1 %2\n%3\n");
        header = header.arg(imageWidth).arg(imageHeight).arg(imgColors);

        QByteArray tmpImage(header.toStdString().c_str(), header.length());
        tmpImage.append(imageRecBuffer);

        //qDebug() << "IMAGE SIZE:" << tmpImage.size() << "HEADER SIZE: (15):" << header.size() << "HEADER: " << header;

        if (imageRecBuffer.isNull())
        {
            qDebug()<< "could not convertToPGM()";
            return QImage();
        }

        if (!image.loadFromData(tmpImage, "PGM"))
        {
            qDebug()<< __FILE__ << __LINE__ << "could not create extracted image";
            return QImage();
        }

    }
    // BMP with header
    else if (imageType == MAVLINK_DATA_STREAM_IMG_BMP ||
             imageType == MAVLINK_DATA_STREAM_IMG_JPEG ||
             imageType == MAVLINK_DATA_STREAM_IMG_PGM ||
             imageType == MAVLINK_DATA_STREAM_IMG_PNG)
    {
        if (!image.loadFromData(imageRecBuffer))
        {
            qDebug() << __FILE__ << __LINE__ << "Loading data from image buffer failed!";
            return QImage();
        }
    }

    // Restart statemachine
    imagePacketsArrived = 0;
    imagePackets = 0;
    imageRecBuffer.clear();
    return image;
}

void UAS::requestImage()
{
    qDebug() << "trying to get an image from the uas...";

    // check if there is already an image transmission going on
    if (imagePacketsArrived == 0)
    {
        mavlink_message_t msg;
        mavlink_msg_data_transmission_handshake_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, MAVLINK_DATA_STREAM_IMG_JPEG, 0, 0, 0, 0, 0, 50);
        sendMessage(msg);
    }
}


/* MANAGEMENT */

/**
 *
 * @return The uptime in milliseconds
 *
 */
quint64 UAS::getUptime() const
{
    if(startTime == 0)
    {
        return 0;
    }
    else
    {
        return QGC::groundTimeMilliseconds() - startTime;
    }
}

void UAS::writeParametersToStorage()
{
    mavlink_message_t msg;
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, 0, MAV_CMD_PREFLIGHT_STORAGE, 1, 1, -1, -1, -1, 0, 0, 0);
    qDebug() << "SENT COMMAND" << MAV_CMD_PREFLIGHT_STORAGE;
    sendMessage(msg);
}

void UAS::readParametersFromStorage()
{
    mavlink_message_t msg;
    mavlink_msg_command_long_pack(mavlink->getSystemId(), mavlink->getComponentId(), &msg, uasId, 0, MAV_CMD_PREFLIGHT_STORAGE, 1, 0, -1, -1, -1, 0, 0, 0);
    sendMessage(msg);
}

bool UAS::isRotaryWing()
{
    switch (type) {
        case MAV_TYPE_QUADROTOR:
        /* fallthrough */
        case MAV_TYPE_COAXIAL:
        case MAV_TYPE_HELICOPTER:
        case MAV_TYPE_HEXAROTOR:
        case MAV_TYPE_OCTOROTOR:
        case MAV_TYPE_TRICOPTER:
            return true;
        default:
            return false;
    }
}

bool UAS::isFixedWing()
{
    switch (type) {
        case MAV_TYPE_FIXED_WING:
            return true;
        default:
            return false;
    }
}

/**
* @param rate The update rate in Hz the message should be sent
*/
void UAS::enableAllDataTransmission(int rate)
{
    // Buffers to write data to
    mavlink_message_t msg;
    mavlink_request_data_stream_t stream;
    // Select the message to request from now on
    // 0 is a magic ID and will enable/disable the standard message set except for heartbeat
    stream.req_stream_id = MAV_DATA_STREAM_ALL;
    // Select the update rate in Hz the message should be send
    // All messages will be send with their default rate
    // TODO: use 0 to turn off and get rid of enable/disable? will require
    //  a different magic flag for turning on defaults, possibly something really high like 1111 ?
    stream.req_message_rate = 0;
    // Start / stop the message
    stream.start_stop = (rate) ? 1 : 0;
    // The system which should take this command
    stream.target_system = uasId;
    // The component / subsystem which should take this command
    stream.target_component = 0;
    // Encode and send the message
    mavlink_msg_request_data_stream_encode(mavlink->getSystemId(), mavlink->getComponentId(), &msg, &stream);
    // Send message twice to increase chance of reception
    sendMessage(msg);
}

/**
* @param rate The update rate in Hz the message should be sent
*/
void UAS::enableRawSensorDataTransmission(int rate)
{
    // Buffers to write data to
    mavlink_message_t msg;
    mavlink_request_data_stream_t stream;
    // Select the message to request from now on
    stream.req_stream_id = MAV_DATA_STREAM_RAW_SENSORS;
    // Select the update rate in Hz the message should be send
    stream.req_message_rate = rate;
    // Start / stop the message
    stream.start_stop = (rate) ? 1 : 0;
    // The system which should take this command
    stream.target_system = uasId;
    // The component / subsystem which should take this command
    stream.target_component = 0;
    // Encode and send the message