c_library_v2/common/mavlink_msg_optical_flow.h

#pragma once
// MESSAGE OPTICAL_FLOW PACKING

#define MAVLINK_MSG_ID_OPTICAL_FLOW 100

MAVPACKED(
typedef struct __mavlink_optical_flow_t {
 uint32_t time_usec; /*< [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.*/
 float flow_comp_m_x; /*< [m/s] Flow in x-sensor direction, angular-speed compensated*/
 float flow_comp_m_y; /*< [m/s] Flow in y-sensor direction, angular-speed compensated*/
 float ground_distance; /*< [m] Ground distance. Positive value: distance known. Negative value: Unknown distance*/
 int16_t flow_x; /*< [dpix] Flow in x-sensor direction*/
 int16_t flow_y; /*< [dpix] Flow in y-sensor direction*/
 uint8_t sensor_id; /*<  Sensor ID*/
 uint8_t quality; /*<  Optical flow quality / confidence. 0: bad, 255: maximum quality*/
 float flow_rate_x; /*< [rad/s] Flow rate about X axis*/
 float flow_rate_y; /*< [rad/s] Flow rate about Y axis*/
}) mavlink_optical_flow_t;

#define MAVLINK_MSG_ID_OPTICAL_FLOW_LEN 30
#define MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN 22
#define MAVLINK_MSG_ID_100_LEN 30
#define MAVLINK_MSG_ID_100_MIN_LEN 22

#define MAVLINK_MSG_ID_OPTICAL_FLOW_CRC 123
#define MAVLINK_MSG_ID_100_CRC 123



#if MAVLINK_COMMAND_24BIT
#define MAVLINK_MESSAGE_INFO_OPTICAL_FLOW { \
    100, \
    "OPTICAL_FLOW", \
    10, \
    {  { "time_usec", NULL, MAVLINK_TYPE_UINT32_T, 0, 0, offsetof(mavlink_optical_flow_t, time_usec) }, \
         { "sensor_id", NULL, MAVLINK_TYPE_UINT8_T, 0, 20, offsetof(mavlink_optical_flow_t, sensor_id) }, \
         { "flow_x", NULL, MAVLINK_TYPE_INT16_T, 0, 16, offsetof(mavlink_optical_flow_t, flow_x) }, \
         { "flow_y", NULL, MAVLINK_TYPE_INT16_T, 0, 18, offsetof(mavlink_optical_flow_t, flow_y) }, \
         { "flow_comp_m_x", NULL, MAVLINK_TYPE_FLOAT, 0, 4, offsetof(mavlink_optical_flow_t, flow_comp_m_x) }, \
         { "flow_comp_m_y", NULL, MAVLINK_TYPE_FLOAT, 0, 8, offsetof(mavlink_optical_flow_t, flow_comp_m_y) }, \
         { "quality", NULL, MAVLINK_TYPE_UINT8_T, 0, 21, offsetof(mavlink_optical_flow_t, quality) }, \
         { "ground_distance", NULL, MAVLINK_TYPE_FLOAT, 0, 12, offsetof(mavlink_optical_flow_t, ground_distance) }, \
         { "flow_rate_x", NULL, MAVLINK_TYPE_FLOAT, 0, 22, offsetof(mavlink_optical_flow_t, flow_rate_x) }, \
         { "flow_rate_y", NULL, MAVLINK_TYPE_FLOAT, 0, 26, offsetof(mavlink_optical_flow_t, flow_rate_y) }, \
         } \
}
#else
#define MAVLINK_MESSAGE_INFO_OPTICAL_FLOW { \
    "OPTICAL_FLOW", \
    10, \
    {  { "time_usec", NULL, MAVLINK_TYPE_UINT32_T, 0, 0, offsetof(mavlink_optical_flow_t, time_usec) }, \
         { "sensor_id", NULL, MAVLINK_TYPE_UINT8_T, 0, 20, offsetof(mavlink_optical_flow_t, sensor_id) }, \
         { "flow_x", NULL, MAVLINK_TYPE_INT16_T, 0, 16, offsetof(mavlink_optical_flow_t, flow_x) }, \
         { "flow_y", NULL, MAVLINK_TYPE_INT16_T, 0, 18, offsetof(mavlink_optical_flow_t, flow_y) }, \
         { "flow_comp_m_x", NULL, MAVLINK_TYPE_FLOAT, 0, 4, offsetof(mavlink_optical_flow_t, flow_comp_m_x) }, \
         { "flow_comp_m_y", NULL, MAVLINK_TYPE_FLOAT, 0, 8, offsetof(mavlink_optical_flow_t, flow_comp_m_y) }, \
         { "quality", NULL, MAVLINK_TYPE_UINT8_T, 0, 21, offsetof(mavlink_optical_flow_t, quality) }, \
         { "ground_distance", NULL, MAVLINK_TYPE_FLOAT, 0, 12, offsetof(mavlink_optical_flow_t, ground_distance) }, \
         { "flow_rate_x", NULL, MAVLINK_TYPE_FLOAT, 0, 22, offsetof(mavlink_optical_flow_t, flow_rate_x) }, \
         { "flow_rate_y", NULL, MAVLINK_TYPE_FLOAT, 0, 26, offsetof(mavlink_optical_flow_t, flow_rate_y) }, \
         } \
}
#endif

/**
 * @brief Pack a optical_flow message
 * @param system_id ID of this system
 * @param component_id ID of this component (e.g. 200 for IMU)
 * @param msg The MAVLink message to compress the data into
 *
 * @param time_usec [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
 * @param sensor_id  Sensor ID
 * @param flow_x [dpix] Flow in x-sensor direction
 * @param flow_y [dpix] Flow in y-sensor direction
 * @param flow_comp_m_x [m/s] Flow in x-sensor direction, angular-speed compensated
 * @param flow_comp_m_y [m/s] Flow in y-sensor direction, angular-speed compensated
 * @param quality  Optical flow quality / confidence. 0: bad, 255: maximum quality
 * @param ground_distance [m] Ground distance. Positive value: distance known. Negative value: Unknown distance
 * @param flow_rate_x [rad/s] Flow rate about X axis
 * @param flow_rate_y [rad/s] Flow rate about Y axis
 * @return length of the message in bytes (excluding serial stream start sign)
 */
static inline uint16_t mavlink_msg_optical_flow_pack(uint16_t system_id, uint8_t component_id, mavlink_message_t* msg,
                               uint32_t time_usec, uint8_t sensor_id, int16_t flow_x, int16_t flow_y, float flow_comp_m_x, float flow_comp_m_y, uint8_t quality, float ground_distance, float flow_rate_x, float flow_rate_y)
{
#if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
    char buf[MAVLINK_MSG_ID_OPTICAL_FLOW_LEN];
    _mav_put_uint32_t(buf, 0, time_usec);
    _mav_put_float(buf, 4, flow_comp_m_x);
    _mav_put_float(buf, 8, flow_comp_m_y);
    _mav_put_float(buf, 12, ground_distance);
    _mav_put_int16_t(buf, 16, flow_x);
    _mav_put_int16_t(buf, 18, flow_y);
    _mav_put_uint8_t(buf, 20, sensor_id);
    _mav_put_uint8_t(buf, 21, quality);
    _mav_put_float(buf, 22, flow_rate_x);
    _mav_put_float(buf, 26, flow_rate_y);

        memcpy(_MAV_PAYLOAD_NON_CONST(msg), buf, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN);
#else
    mavlink_optical_flow_t packet;
    packet.time_usec = time_usec;
    packet.flow_comp_m_x = flow_comp_m_x;
    packet.flow_comp_m_y = flow_comp_m_y;
    packet.ground_distance = ground_distance;
    packet.flow_x = flow_x;
    packet.flow_y = flow_y;
    packet.sensor_id = sensor_id;
    packet.quality = quality;
    packet.flow_rate_x = flow_rate_x;
    packet.flow_rate_y = flow_rate_y;

        memcpy(_MAV_PAYLOAD_NON_CONST(msg), &packet, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN);
#endif

    msg->msgid = MAVLINK_MSG_ID_OPTICAL_FLOW;
    return mavlink_finalize_message(msg, system_id, component_id, MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_CRC);
}

/**
 * @brief Pack a optical_flow message on a channel
 * @param system_id ID of this system
 * @param component_id ID of this component (e.g. 200 for IMU)
 * @param chan The MAVLink channel this message will be sent over
 * @param msg The MAVLink message to compress the data into
 * @param time_usec [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
 * @param sensor_id  Sensor ID
 * @param flow_x [dpix] Flow in x-sensor direction
 * @param flow_y [dpix] Flow in y-sensor direction
 * @param flow_comp_m_x [m/s] Flow in x-sensor direction, angular-speed compensated
 * @param flow_comp_m_y [m/s] Flow in y-sensor direction, angular-speed compensated
 * @param quality  Optical flow quality / confidence. 0: bad, 255: maximum quality
 * @param ground_distance [m] Ground distance. Positive value: distance known. Negative value: Unknown distance
 * @param flow_rate_x [rad/s] Flow rate about X axis
 * @param flow_rate_y [rad/s] Flow rate about Y axis
 * @return length of the message in bytes (excluding serial stream start sign)
 */
static inline uint16_t mavlink_msg_optical_flow_pack_chan(uint16_t system_id, uint8_t component_id, uint8_t chan,
                               mavlink_message_t* msg,
                                   uint32_t time_usec,uint8_t sensor_id,int16_t flow_x,int16_t flow_y,float flow_comp_m_x,float flow_comp_m_y,uint8_t quality,float ground_distance,float flow_rate_x,float flow_rate_y)
{
#if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
    char buf[MAVLINK_MSG_ID_OPTICAL_FLOW_LEN];
    _mav_put_uint32_t(buf, 0, time_usec);
    _mav_put_float(buf, 4, flow_comp_m_x);
    _mav_put_float(buf, 8, flow_comp_m_y);
    _mav_put_float(buf, 12, ground_distance);
    _mav_put_int16_t(buf, 16, flow_x);
    _mav_put_int16_t(buf, 18, flow_y);
    _mav_put_uint8_t(buf, 20, sensor_id);
    _mav_put_uint8_t(buf, 21, quality);
    _mav_put_float(buf, 22, flow_rate_x);
    _mav_put_float(buf, 26, flow_rate_y);

        memcpy(_MAV_PAYLOAD_NON_CONST(msg), buf, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN);
#else
    mavlink_optical_flow_t packet;
    packet.time_usec = time_usec;
    packet.flow_comp_m_x = flow_comp_m_x;
    packet.flow_comp_m_y = flow_comp_m_y;
    packet.ground_distance = ground_distance;
    packet.flow_x = flow_x;
    packet.flow_y = flow_y;
    packet.sensor_id = sensor_id;
    packet.quality = quality;
    packet.flow_rate_x = flow_rate_x;
    packet.flow_rate_y = flow_rate_y;

        memcpy(_MAV_PAYLOAD_NON_CONST(msg), &packet, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN);
#endif

    msg->msgid = MAVLINK_MSG_ID_OPTICAL_FLOW;
    return mavlink_finalize_message_chan(msg, system_id, component_id, chan, MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_CRC);
}

/**
 * @brief Encode a optical_flow struct
 *
 * @param system_id ID of this system
 * @param component_id ID of this component (e.g. 200 for IMU)
 * @param msg The MAVLink message to compress the data into
 * @param optical_flow C-struct to read the message contents from
 */
static inline uint16_t mavlink_msg_optical_flow_encode(uint16_t system_id, uint8_t component_id, mavlink_message_t* msg, const mavlink_optical_flow_t* optical_flow)
{
    return mavlink_msg_optical_flow_pack(system_id, component_id, msg, optical_flow->time_usec, optical_flow->sensor_id, optical_flow->flow_x, optical_flow->flow_y, optical_flow->flow_comp_m_x, optical_flow->flow_comp_m_y, optical_flow->quality, optical_flow->ground_distance, optical_flow->flow_rate_x, optical_flow->flow_rate_y);
}

/**
 * @brief Encode a optical_flow struct on a channel
 *
 * @param system_id ID of this system
 * @param component_id ID of this component (e.g. 200 for IMU)
 * @param chan The MAVLink channel this message will be sent over
 * @param msg The MAVLink message to compress the data into
 * @param optical_flow C-struct to read the message contents from
 */
static inline uint16_t mavlink_msg_optical_flow_encode_chan(uint16_t system_id, uint8_t component_id, uint8_t chan, mavlink_message_t* msg, const mavlink_optical_flow_t* optical_flow)
{
    return mavlink_msg_optical_flow_pack_chan(system_id, component_id, chan, msg, optical_flow->time_usec, optical_flow->sensor_id, optical_flow->flow_x, optical_flow->flow_y, optical_flow->flow_comp_m_x, optical_flow->flow_comp_m_y, optical_flow->quality, optical_flow->ground_distance, optical_flow->flow_rate_x, optical_flow->flow_rate_y);
}

/**
 * @brief Send a optical_flow message
 * @param chan MAVLink channel to send the message
 *
 * @param time_usec [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
 * @param sensor_id  Sensor ID
 * @param flow_x [dpix] Flow in x-sensor direction
 * @param flow_y [dpix] Flow in y-sensor direction
 * @param flow_comp_m_x [m/s] Flow in x-sensor direction, angular-speed compensated
 * @param flow_comp_m_y [m/s] Flow in y-sensor direction, angular-speed compensated
 * @param quality  Optical flow quality / confidence. 0: bad, 255: maximum quality
 * @param ground_distance [m] Ground distance. Positive value: distance known. Negative value: Unknown distance
 * @param flow_rate_x [rad/s] Flow rate about X axis
 * @param flow_rate_y [rad/s] Flow rate about Y axis
 */
#ifdef MAVLINK_USE_CONVENIENCE_FUNCTIONS

static inline void mavlink_msg_optical_flow_send(mavlink_channel_t chan, uint32_t time_usec, uint8_t sensor_id, int16_t flow_x, int16_t flow_y, float flow_comp_m_x, float flow_comp_m_y, uint8_t quality, float ground_distance, float flow_rate_x, float flow_rate_y)
{
#if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
    char buf[MAVLINK_MSG_ID_OPTICAL_FLOW_LEN];
    _mav_put_uint32_t(buf, 0, time_usec);
    _mav_put_float(buf, 4, flow_comp_m_x);
    _mav_put_float(buf, 8, flow_comp_m_y);
    _mav_put_float(buf, 12, ground_distance);
    _mav_put_int16_t(buf, 16, flow_x);
    _mav_put_int16_t(buf, 18, flow_y);
    _mav_put_uint8_t(buf, 20, sensor_id);
    _mav_put_uint8_t(buf, 21, quality);
    _mav_put_float(buf, 22, flow_rate_x);
    _mav_put_float(buf, 26, flow_rate_y);

    _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_OPTICAL_FLOW, buf, MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_CRC);
#else
    mavlink_optical_flow_t packet;
    packet.time_usec = time_usec;
    packet.flow_comp_m_x = flow_comp_m_x;
    packet.flow_comp_m_y = flow_comp_m_y;
    packet.ground_distance = ground_distance;
    packet.flow_x = flow_x;
    packet.flow_y = flow_y;
    packet.sensor_id = sensor_id;
    packet.quality = quality;
    packet.flow_rate_x = flow_rate_x;
    packet.flow_rate_y = flow_rate_y;

    _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_OPTICAL_FLOW, (const char *)&packet, MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_CRC);
#endif
}

/**
 * @brief Send a optical_flow message
 * @param chan MAVLink channel to send the message
 * @param struct The MAVLink struct to serialize
 */
static inline void mavlink_msg_optical_flow_send_struct(mavlink_channel_t chan, const mavlink_optical_flow_t* optical_flow)
{
#if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
    mavlink_msg_optical_flow_send(chan, optical_flow->time_usec, optical_flow->sensor_id, optical_flow->flow_x, optical_flow->flow_y, optical_flow->flow_comp_m_x, optical_flow->flow_comp_m_y, optical_flow->quality, optical_flow->ground_distance, optical_flow->flow_rate_x, optical_flow->flow_rate_y);
#else
    _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_OPTICAL_FLOW, (const char *)optical_flow, MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_CRC);
#endif
}

#if MAVLINK_MSG_ID_OPTICAL_FLOW_LEN <= MAVLINK_MAX_PAYLOAD_LEN
/*
  This varient of _send() can be used to save stack space by re-using
  memory from the receive buffer.  The caller provides a
  mavlink_message_t which is the size of a full mavlink message. This
  is usually the receive buffer for the channel, and allows a reply to an
  incoming message with minimum stack space usage.
 */
static inline void mavlink_msg_optical_flow_send_buf(mavlink_message_t *msgbuf, mavlink_channel_t chan,  uint32_t time_usec, uint8_t sensor_id, int16_t flow_x, int16_t flow_y, float flow_comp_m_x, float flow_comp_m_y, uint8_t quality, float ground_distance, float flow_rate_x, float flow_rate_y)
{
#if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
    char *buf = (char *)msgbuf;
    _mav_put_uint32_t(buf, 0, time_usec);
    _mav_put_float(buf, 4, flow_comp_m_x);
    _mav_put_float(buf, 8, flow_comp_m_y);
    _mav_put_float(buf, 12, ground_distance);
    _mav_put_int16_t(buf, 16, flow_x);
    _mav_put_int16_t(buf, 18, flow_y);
    _mav_put_uint8_t(buf, 20, sensor_id);
    _mav_put_uint8_t(buf, 21, quality);
    _mav_put_float(buf, 22, flow_rate_x);
    _mav_put_float(buf, 26, flow_rate_y);

    _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_OPTICAL_FLOW, buf, MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_CRC);
#else
    mavlink_optical_flow_t *packet = (mavlink_optical_flow_t *)msgbuf;
    packet->time_usec = time_usec;
    packet->flow_comp_m_x = flow_comp_m_x;
    packet->flow_comp_m_y = flow_comp_m_y;
    packet->ground_distance = ground_distance;
    packet->flow_x = flow_x;
    packet->flow_y = flow_y;
    packet->sensor_id = sensor_id;
    packet->quality = quality;
    packet->flow_rate_x = flow_rate_x;
    packet->flow_rate_y = flow_rate_y;

    _mav_finalize_message_chan_send(chan, MAVLINK_MSG_ID_OPTICAL_FLOW, (const char *)packet, MAVLINK_MSG_ID_OPTICAL_FLOW_MIN_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN, MAVLINK_MSG_ID_OPTICAL_FLOW_CRC);
#endif
}
#endif

#endif

// MESSAGE OPTICAL_FLOW UNPACKING


/**
 * @brief Get field time_usec from optical_flow message
 *
 * @return [us] Timestamp (UNIX Epoch time or time since system boot). The receiving end can infer timestamp format (since 1.1.1970 or since system boot) by checking for the magnitude of the number.
 */
static inline uint32_t mavlink_msg_optical_flow_get_time_usec(const mavlink_message_t* msg)
{
    return _MAV_RETURN_uint32_t(msg,  0);
}

/**
 * @brief Get field sensor_id from optical_flow message
 *
 * @return  Sensor ID
 */
static inline uint8_t mavlink_msg_optical_flow_get_sensor_id(const mavlink_message_t* msg)
{
    return _MAV_RETURN_uint8_t(msg,  20);
}

/**
 * @brief Get field flow_x from optical_flow message
 *
 * @return [dpix] Flow in x-sensor direction
 */
static inline int16_t mavlink_msg_optical_flow_get_flow_x(const mavlink_message_t* msg)
{
    return _MAV_RETURN_int16_t(msg,  16);
}

/**
 * @brief Get field flow_y from optical_flow message
 *
 * @return [dpix] Flow in y-sensor direction
 */
static inline int16_t mavlink_msg_optical_flow_get_flow_y(const mavlink_message_t* msg)
{
    return _MAV_RETURN_int16_t(msg,  18);
}

/**
 * @brief Get field flow_comp_m_x from optical_flow message
 *
 * @return [m/s] Flow in x-sensor direction, angular-speed compensated
 */
static inline float mavlink_msg_optical_flow_get_flow_comp_m_x(const mavlink_message_t* msg)
{
    return _MAV_RETURN_float(msg,  4);
}

/**
 * @brief Get field flow_comp_m_y from optical_flow message
 *
 * @return [m/s] Flow in y-sensor direction, angular-speed compensated
 */
static inline float mavlink_msg_optical_flow_get_flow_comp_m_y(const mavlink_message_t* msg)
{
    return _MAV_RETURN_float(msg,  8);
}

/**
 * @brief Get field quality from optical_flow message
 *
 * @return  Optical flow quality / confidence. 0: bad, 255: maximum quality
 */
static inline uint8_t mavlink_msg_optical_flow_get_quality(const mavlink_message_t* msg)
{
    return _MAV_RETURN_uint8_t(msg,  21);
}

/**
 * @brief Get field ground_distance from optical_flow message
 *
 * @return [m] Ground distance. Positive value: distance known. Negative value: Unknown distance
 */
static inline float mavlink_msg_optical_flow_get_ground_distance(const mavlink_message_t* msg)
{
    return _MAV_RETURN_float(msg,  12);
}

/**
 * @brief Get field flow_rate_x from optical_flow message
 *
 * @return [rad/s] Flow rate about X axis
 */
static inline float mavlink_msg_optical_flow_get_flow_rate_x(const mavlink_message_t* msg)
{
    return _MAV_RETURN_float(msg,  22);
}

/**
 * @brief Get field flow_rate_y from optical_flow message
 *
 * @return [rad/s] Flow rate about Y axis
 */
static inline float mavlink_msg_optical_flow_get_flow_rate_y(const mavlink_message_t* msg)
{
    return _MAV_RETURN_float(msg,  26);
}

/**
 * @brief Decode a optical_flow message into a struct
 *
 * @param msg The message to decode
 * @param optical_flow C-struct to decode the message contents into
 */
static inline void mavlink_msg_optical_flow_decode(const mavlink_message_t* msg, mavlink_optical_flow_t* optical_flow)
{
#if MAVLINK_NEED_BYTE_SWAP || !MAVLINK_ALIGNED_FIELDS
    optical_flow->time_usec = mavlink_msg_optical_flow_get_time_usec(msg);
    optical_flow->flow_comp_m_x = mavlink_msg_optical_flow_get_flow_comp_m_x(msg);
    optical_flow->flow_comp_m_y = mavlink_msg_optical_flow_get_flow_comp_m_y(msg);
    optical_flow->ground_distance = mavlink_msg_optical_flow_get_ground_distance(msg);
    optical_flow->flow_x = mavlink_msg_optical_flow_get_flow_x(msg);
    optical_flow->flow_y = mavlink_msg_optical_flow_get_flow_y(msg);
    optical_flow->sensor_id = mavlink_msg_optical_flow_get_sensor_id(msg);
    optical_flow->quality = mavlink_msg_optical_flow_get_quality(msg);
    optical_flow->flow_rate_x = mavlink_msg_optical_flow_get_flow_rate_x(msg);
    optical_flow->flow_rate_y = mavlink_msg_optical_flow_get_flow_rate_y(msg);
#else
        uint8_t len = msg->len < MAVLINK_MSG_ID_OPTICAL_FLOW_LEN? msg->len : MAVLINK_MSG_ID_OPTICAL_FLOW_LEN;
        memset(optical_flow, 0, MAVLINK_MSG_ID_OPTICAL_FLOW_LEN);
    memcpy(optical_flow, _MAV_PAYLOAD(msg), len);
#endif
}