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Merge pull request #1995 from dvinc/offboard-ardupilot-rover

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/src/mavsdk/plugins/offboard/offboard_impl.cpp

#include <cmath>
#include <utility>
#include "mavsdk_math.h"
#include "offboard_impl.h"
#include "mavsdk_impl.h"
#include "px4_custom_mode.h"

namespace mavsdk {

OffboardImpl::OffboardImpl(System& system) : PluginImplBase(system)
{
    _parent->register_plugin(this);
}

OffboardImpl::OffboardImpl(std::shared_ptr<System> system) : PluginImplBase(std::move(system))
{
    _parent->register_plugin(this);
}

OffboardImpl::~OffboardImpl()
{
    _parent->unregister_plugin(this);
}

void OffboardImpl::init()
{
    _parent->register_mavlink_message_handler(
        MAVLINK_MSG_ID_HEARTBEAT,
        [this](const mavlink_message_t& message) { process_heartbeat(message); },
        this);
}

void OffboardImpl::deinit()
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        stop_sending_setpoints();
    }
    _parent->unregister_all_mavlink_message_handlers(this);
}

void OffboardImpl::enable() {}

void OffboardImpl::disable() {}

Offboard::Result OffboardImpl::start()
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        if (_mode == Mode::NotActive) {
            return Offboard::Result::NoSetpointSet;
        }
        _last_started = _time.steady_time();
    }

    return offboard_result_from_command_result(_parent->set_flight_mode(FlightMode::Offboard));
}

Offboard::Result OffboardImpl::stop()
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        if (_mode != Mode::NotActive) {
            stop_sending_setpoints();
        }
    }

    return offboard_result_from_command_result(_parent->set_flight_mode(FlightMode::Hold));
}

void OffboardImpl::start_async(Offboard::ResultCallback callback)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);

        if (_mode == Mode::NotActive) {
            if (callback) {
                _parent->call_user_callback(
                    [callback]() { callback(Offboard::Result::NoSetpointSet); });
            }
            return;
        }
        _last_started = _time.steady_time();
    }

    _parent->set_flight_mode_async(
        FlightMode::Offboard, [callback, this](MavlinkCommandSender::Result result, float) {
            receive_command_result(result, callback);
        });
}

void OffboardImpl::stop_async(Offboard::ResultCallback callback)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        if (_mode != Mode::NotActive) {
            stop_sending_setpoints();
        }
    }

    _parent->set_flight_mode_async(
        FlightMode::Hold, [callback, this](MavlinkCommandSender::Result result, float) {
            receive_command_result(result, callback);
        });
}

bool OffboardImpl::is_active()
{
    std::lock_guard<std::mutex> lock(_mutex);
    return (_mode != Mode::NotActive);
}

void OffboardImpl::receive_command_result(
    MavlinkCommandSender::Result result, const Offboard::ResultCallback& callback)
{
    Offboard::Result offboard_result = offboard_result_from_command_result(result);
    if (callback) {
        _parent->call_user_callback([callback, offboard_result]() { callback(offboard_result); });
    }
}

Offboard::Result OffboardImpl::set_position_ned(Offboard::PositionNedYaw position_ned_yaw)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _position_ned_yaw = position_ned_yaw;

        if (_mode != Mode::PositionNed) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send Ned setpoints from now on.
            _parent->add_call_every(
                [this]() { send_position_ned(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::PositionNed;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // also send it right now to reduce latency
    return send_position_ned();
}

Offboard::Result OffboardImpl::set_position_global(Offboard::PositionGlobalYaw position_global_yaw)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _position_global_yaw = position_global_yaw;

        if (_mode != Mode::PositionGlobalAltRel) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send Global setpoints from now on.
            _parent->add_call_every(
                [this]() { send_position_global(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::PositionGlobalAltRel;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // also send it right now to reduce latency
    return send_position_global();
}

Offboard::Result OffboardImpl::set_velocity_ned(Offboard::VelocityNedYaw velocity_ned_yaw)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _velocity_ned_yaw = velocity_ned_yaw;

        if (_mode != Mode::VelocityNed) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send Ned setpoints from now on.
            _parent->add_call_every(
                [this]() { send_velocity_ned(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::VelocityNed;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }
    // also send it right now to reduce latency
    return send_velocity_ned();
}

Offboard::Result OffboardImpl::set_position_velocity_ned(
    Offboard::PositionNedYaw position_ned_yaw, Offboard::VelocityNedYaw velocity_ned_yaw)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _position_ned_yaw = position_ned_yaw;
        _velocity_ned_yaw = velocity_ned_yaw;

        if (_mode != Mode::PositionVelocityNed) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send Ned setpoints from now on.
            _parent->add_call_every(
                [this]() { send_position_velocity_ned(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::PositionVelocityNed;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // also send it right now to reduce latency
    return send_position_velocity_ned();
}

Offboard::Result OffboardImpl::set_acceleration_ned(Offboard::AccelerationNed acceleration_ned)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _acceleration_ned = acceleration_ned;

        if (_mode != Mode::AccelerationNed) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send Ned setpoints from now on.
            _parent->add_call_every(
                [this]() { send_acceleration_ned(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::AccelerationNed;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // also send it right now to reduce latency
    return send_acceleration_ned();
}

Offboard::Result
OffboardImpl::set_velocity_body(Offboard::VelocityBodyYawspeed velocity_body_yawspeed)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _velocity_body_yawspeed = velocity_body_yawspeed;

        if (_mode != Mode::VelocityBody) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send body setpoints from now on.
            _parent->add_call_every(
                [this]() { send_velocity_body(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::VelocityBody;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // also send it right now to reduce latency
    return send_velocity_body();
}

Offboard::Result OffboardImpl::set_attitude(Offboard::Attitude attitude)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _attitude = attitude;

        if (_mode != Mode::Attitude) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send body setpoints from now on.
            _parent->add_call_every(
                [this]() { send_attitude(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::Attitude;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // also send it right now to reduce latency
    return send_attitude();
}

Offboard::Result OffboardImpl::set_attitude_rate(Offboard::AttitudeRate attitude_rate)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _attitude_rate = attitude_rate;

        if (_mode != Mode::AttitudeRate) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send body setpoints from now on.
            _parent->add_call_every(
                [this]() { send_attitude_rate(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::AttitudeRate;
        } else {
            // We're already sending these kind of setpoints. Since the setpoint change, let's
            // reschedule the next call, so we don't send setpoints too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // also send it right now to reduce latency
    return send_attitude_rate();
}

Offboard::Result OffboardImpl::set_actuator_control(Offboard::ActuatorControl actuator_control)
{
    {
        std::lock_guard<std::mutex> lock(_mutex);
        _actuator_control = actuator_control;

        if (_mode != Mode::ActuatorControl) {
            if (_call_every_cookie) {
                // If we're already sending other setpoints, stop that now.
                _parent->remove_call_every(_call_every_cookie);
                _call_every_cookie = nullptr;
            }
            // We automatically send motor rate values from now on.
            _parent->add_call_every(
                [this]() { send_actuator_control(); }, SEND_INTERVAL_S, &_call_every_cookie);

            _mode = Mode::ActuatorControl;
        } else {
            // We're already sending these kind of values. Since the value changes, let's
            // reschedule the next call, so we don't send values too often.
            _parent->reset_call_every(_call_every_cookie);
        }
    }

    // It gets sent immediately as part of add_call_every.
    return Offboard::Result::Success;
}

Offboard::Result OffboardImpl::send_position_ned()
{
    const static uint16_t IGNORE_VX = (1 << 3);
    const static uint16_t IGNORE_VY = (1 << 4);
    const static uint16_t IGNORE_VZ = (1 << 5);
    const static uint16_t IGNORE_AX = (1 << 6);
    const static uint16_t IGNORE_AY = (1 << 7);
    const static uint16_t IGNORE_AZ = (1 << 8);
    const static uint16_t IGNORE_YAW_RATE = (1 << 11);

    const auto position_ned_yaw = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return _position_ned_yaw;
    }();

    mavlink_message_t message;
    mavlink_msg_set_position_target_local_ned_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        MAV_FRAME_LOCAL_NED,
        IGNORE_VX | IGNORE_VY | IGNORE_VZ | IGNORE_AX | IGNORE_AY | IGNORE_AZ | IGNORE_YAW_RATE,
        position_ned_yaw.north_m,
        position_ned_yaw.east_m,
        position_ned_yaw.down_m,
        0.0f, // vx
        0.0f, // vy
        0.0f, // vz
        0.0f, // afx
        0.0f, // afy
        0.0f, // afz
        to_rad_from_deg(position_ned_yaw.yaw_deg), // yaw
        0.0f); // yaw_rate
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_position_global()
{
    const static uint16_t IGNORE_VX = (1 << 3);
    const static uint16_t IGNORE_VY = (1 << 4);
    const static uint16_t IGNORE_VZ = (1 << 5);
    const static uint16_t IGNORE_AX = (1 << 6);
    const static uint16_t IGNORE_AY = (1 << 7);
    const static uint16_t IGNORE_AZ = (1 << 8);
    const static uint16_t IGNORE_YAW_RATE = (1 << 11);

    const auto position_global_yaw = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return _position_global_yaw;
    }();

    MAV_FRAME frame;
    switch (position_global_yaw.altitude_type) {
        case Offboard::PositionGlobalYaw::AltitudeType::Amsl:
            frame = MAV_FRAME_GLOBAL_INT;
            break;
        case Offboard::PositionGlobalYaw::AltitudeType::Agl:
            frame = MAV_FRAME_GLOBAL_TERRAIN_ALT_INT;
            break;
        case Offboard::PositionGlobalYaw::AltitudeType::RelHome:
            frame = MAV_FRAME_GLOBAL_RELATIVE_ALT_INT;
            break;
        default:
            return Offboard::Result::CommandDenied;
            break;
    }

    mavlink_message_t message;
    mavlink_msg_set_position_target_global_int_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        frame,
        IGNORE_VX | IGNORE_VY | IGNORE_VZ | IGNORE_AX | IGNORE_AY | IGNORE_AZ | IGNORE_YAW_RATE,
        (int32_t)(position_global_yaw.lat_deg * 1.0e7),
        (int32_t)(position_global_yaw.lon_deg * 1.0e7),
        position_global_yaw.alt_m,
        0.0f, // vx
        0.0f, // vy
        0.0f, // vz
        0.0f, // afx
        0.0f, // afy
        0.0f, // afz
        to_rad_from_deg(position_global_yaw.yaw_deg), // yaw
        0.0f); // yaw_rate
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_velocity_ned()
{
    const static uint16_t IGNORE_X = (1 << 0);
    const static uint16_t IGNORE_Y = (1 << 1);
    const static uint16_t IGNORE_Z = (1 << 2);
    const static uint16_t IGNORE_AX = (1 << 6);
    const static uint16_t IGNORE_AY = (1 << 7);
    const static uint16_t IGNORE_AZ = (1 << 8);
    const static uint16_t IGNORE_YAW_RATE = (1 << 11);

    const auto velocity_ned_yaw = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return _velocity_ned_yaw;
    }();

    mavlink_message_t message;
    mavlink_msg_set_position_target_local_ned_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        MAV_FRAME_LOCAL_NED,
        IGNORE_X | IGNORE_Y | IGNORE_Z | IGNORE_AX | IGNORE_AY | IGNORE_AZ | IGNORE_YAW_RATE,
        0.0f, // x,
        0.0f, // y,
        0.0f, // z,
        velocity_ned_yaw.north_m_s,
        velocity_ned_yaw.east_m_s,
        velocity_ned_yaw.down_m_s,
        0.0f, // afx
        0.0f, // afy
        0.0f, // afz
        to_rad_from_deg(velocity_ned_yaw.yaw_deg), // yaw
        0.0f); // yaw_rate
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_position_velocity_ned()
{
    const static uint16_t IGNORE_AX = (1 << 6);
    const static uint16_t IGNORE_AY = (1 << 7);
    const static uint16_t IGNORE_AZ = (1 << 8);
    const static uint16_t IGNORE_YAW_RATE = (1 << 11);

    const auto position_and_velocity = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return std::make_pair<>(_position_ned_yaw, _velocity_ned_yaw);
    }();

    mavlink_message_t message;
    mavlink_msg_set_position_target_local_ned_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        MAV_FRAME_LOCAL_NED,
        IGNORE_AX | IGNORE_AY | IGNORE_AZ | IGNORE_YAW_RATE,
        position_and_velocity.first.north_m,
        position_and_velocity.first.east_m,
        position_and_velocity.first.down_m,
        position_and_velocity.second.north_m_s,
        position_and_velocity.second.east_m_s,
        position_and_velocity.second.down_m_s,
        0.0f, // afx
        0.0f, // afy
        0.0f, // afz
        to_rad_from_deg(position_and_velocity.first.yaw_deg), // yaw
        0.0f); // yaw_rate
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_acceleration_ned()
{
    const static uint16_t IGNORE_X = (1 << 0);
    const static uint16_t IGNORE_Y = (1 << 1);
    const static uint16_t IGNORE_Z = (1 << 2);
    const static uint16_t IGNORE_VX = (1 << 3);
    const static uint16_t IGNORE_VY = (1 << 4);
    const static uint16_t IGNORE_VZ = (1 << 5);
    const static uint16_t IGNORE_YAW = (1 << 10);
    const static uint16_t IGNORE_YAW_RATE = (1 << 11);

    const auto acceleration_ned = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return _acceleration_ned;
    }();

    mavlink_message_t message;
    mavlink_msg_set_position_target_local_ned_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        MAV_FRAME_LOCAL_NED,
        IGNORE_X | IGNORE_Y | IGNORE_Z | IGNORE_VX | IGNORE_VY | IGNORE_VZ | IGNORE_YAW |
            IGNORE_YAW_RATE,
        0.0f, // x,
        0.0f, // y,
        0.0f, // z,
        0.0f, // vfx
        0.0f, // vfy
        0.0f, // vfz
        acceleration_ned.north_m_s2,
        acceleration_ned.east_m_s2,
        acceleration_ned.down_m_s2,
        0.0f, // yaw
        0.0f); // yaw_rate
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_velocity_body()
{
    const static uint16_t IGNORE_X = (1 << 0);
    const static uint16_t IGNORE_Y = (1 << 1);
    const static uint16_t IGNORE_Z = (1 << 2);
    const static uint16_t IGNORE_AX = (1 << 6);
    const static uint16_t IGNORE_AY = (1 << 7);
    const static uint16_t IGNORE_AZ = (1 << 8);
    const static uint16_t IGNORE_YAW = (1 << 10);

    const auto velocity_body_yawspeed = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return _velocity_body_yawspeed;
    }();

    mavlink_message_t message;
    mavlink_msg_set_position_target_local_ned_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        MAV_FRAME_BODY_NED,
        IGNORE_X | IGNORE_Y | IGNORE_Z | IGNORE_AX | IGNORE_AY | IGNORE_AZ | IGNORE_YAW,
        0.0f, // x
        0.0f, // y
        0.0f, // z
        velocity_body_yawspeed.forward_m_s,
        velocity_body_yawspeed.right_m_s,
        velocity_body_yawspeed.down_m_s,
        0.0f, // afx
        0.0f, // afy
        0.0f, // afz
        0.0f, // yaw
        to_rad_from_deg(velocity_body_yawspeed.yawspeed_deg_s));
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_attitude()
{
    const static uint8_t IGNORE_BODY_ROLL_RATE = (1 << 0);
    const static uint8_t IGNORE_BODY_PITCH_RATE = (1 << 1);
    const static uint8_t IGNORE_BODY_YAW_RATE = (1 << 2);

    const auto attitude = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return _attitude;
    }();

    const float thrust = _attitude.thrust_value;
    const float roll = to_rad_from_deg(attitude.roll_deg);
    const float pitch = to_rad_from_deg(attitude.pitch_deg);
    const float yaw = to_rad_from_deg(attitude.yaw_deg);

    const double cos_phi_2 = cos(double(roll) / 2.0);
    const double sin_phi_2 = sin(double(roll) / 2.0);
    const double cos_theta_2 = cos(double(pitch) / 2.0);
    const double sin_theta_2 = sin(double(pitch) / 2.0);
    const double cos_psi_2 = cos(double(yaw) / 2.0);
    const double sin_psi_2 = sin(double(yaw) / 2.0);

    float q[4];

    q[0] = float(cos_phi_2 * cos_theta_2 * cos_psi_2 + sin_phi_2 * sin_theta_2 * sin_psi_2);
    q[1] = float(sin_phi_2 * cos_theta_2 * cos_psi_2 - cos_phi_2 * sin_theta_2 * sin_psi_2);
    q[2] = float(cos_phi_2 * sin_theta_2 * cos_psi_2 + sin_phi_2 * cos_theta_2 * sin_psi_2);
    q[3] = float(cos_phi_2 * cos_theta_2 * sin_psi_2 - sin_phi_2 * sin_theta_2 * cos_psi_2);

    const float thrust_body[3] = {0.0f, 0.0f, 0.0f};

    mavlink_message_t message;
    mavlink_msg_set_attitude_target_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        IGNORE_BODY_ROLL_RATE | IGNORE_BODY_PITCH_RATE | IGNORE_BODY_YAW_RATE,
        q,
        0,
        0,
        0,
        thrust,
        thrust_body);
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_attitude_rate()
{
    const static uint8_t IGNORE_ATTITUDE = (1 << 7);

    const auto attitude_rate = [this]() {
        std::lock_guard<std::mutex> lock(_mutex);
        return _attitude_rate;
    }();

    const float thrust_body[3] = {0.0f, 0.0f, 0.0f};

    mavlink_message_t message;
    mavlink_msg_set_attitude_target_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        IGNORE_ATTITUDE,
        0,
        to_rad_from_deg(attitude_rate.roll_deg_s),
        to_rad_from_deg(attitude_rate.pitch_deg_s),
        to_rad_from_deg(attitude_rate.yaw_deg_s),
        _attitude_rate.thrust_value,
        thrust_body);
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result
OffboardImpl::send_actuator_control_message(const float* controls, uint8_t group_number)
{
    mavlink_message_t message;
    mavlink_msg_set_actuator_control_target_pack(
        _parent->get_own_system_id(),
        _parent->get_own_component_id(),
        &message,
        static_cast<uint32_t>(_parent->get_time().elapsed_ms()),
        group_number,
        _parent->get_system_id(),
        _parent->get_autopilot_id(),
        controls);
    return _parent->send_message(message) ? Offboard::Result::Success :
                                            Offboard::Result::ConnectionError;
}

Offboard::Result OffboardImpl::send_actuator_control()
{
    std::lock_guard<std::mutex> lock(_mutex);

    for (unsigned i = 0; i < 4 && i < _actuator_control.groups.size(); ++i) {
        _actuator_control.groups[i].controls.resize(8, NAN);

        for (unsigned j = 0; j < 8; ++j) {
            if (std::isnan(_actuator_control.groups[i].controls[j])) {
                _actuator_control.groups[i].controls[j] = 0.0f;
            }
        }
        auto result = send_actuator_control_message(&_actuator_control.groups[i].controls[0], i);

        if (result != Offboard::Result::Success) {
            return result;
        }
    }

    return Offboard::Result::Success;
}

void OffboardImpl::process_heartbeat(const mavlink_message_t& message)
{
    // Process only Heartbeat coming from the autopilot
    if (message.compid != MAV_COMP_ID_AUTOPILOT1) {
        return;
    }

    mavlink_heartbeat_t heartbeat;
    mavlink_msg_heartbeat_decode(&message, &heartbeat);

    bool offboard_mode_active = false;
    if (heartbeat.base_mode & MAV_MODE_FLAG_CUSTOM_MODE_ENABLED) {
        FlightMode flight_mode = to_flight_mode_from_custom_mode(
            _parent->autopilot(), _parent->get_vehicle_type(), heartbeat.custom_mode);

        if (flight_mode == FlightMode::Offboard) {
            offboard_mode_active = true;
        }
    }

    {
        // Right after we started offboard we might still be getting heartbeats
        // from earlier which don't indicate offboard mode yet.
        // Therefore, we make sure we don't stop too eagerly and ignore
        // possibly stale heartbeats for some time.
        std::lock_guard<std::mutex> lock(_mutex);
        if (!offboard_mode_active && _mode != Mode::NotActive &&
            _time.elapsed_since_s(_last_started) > 3.0) {
            // It seems that we are no longer in offboard mode but still trying to send
            // setpoints. Let's stop for now.
            stop_sending_setpoints();
        }
    }
}

void OffboardImpl::stop_sending_setpoints()
{
    // We assume that we already acquired the mutex in this function.

    if (_call_every_cookie != nullptr) {
        _parent->remove_call_every(_call_every_cookie);
        _call_every_cookie = nullptr;
    }
    _mode = Mode::NotActive;
}

Offboard::Result
OffboardImpl::offboard_result_from_command_result(MavlinkCommandSender::Result result)
{
    switch (result) {
        case MavlinkCommandSender::Result::Success:
            return Offboard::Result::Success;
        case MavlinkCommandSender::Result::NoSystem:
            return Offboard::Result::NoSystem;
        case MavlinkCommandSender::Result::ConnectionError:
            return Offboard::Result::ConnectionError;
        case MavlinkCommandSender::Result::Busy:
            return Offboard::Result::Busy;
        case MavlinkCommandSender::Result::Denied:
            // FALLTHROUGH
        case MavlinkCommandSender::Result::TemporarilyRejected:
            return Offboard::Result::CommandDenied;
        case MavlinkCommandSender::Result::Timeout:
            return Offboard::Result::Timeout;
        case MavlinkCommandSender::Result::Failed:
            return Offboard::Result::Failed;
        default:
            return Offboard::Result::Unknown;
    }
}

} // namespace mavsdk

mavlink / MAVSDK / 4309225683

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