public static unsafe bool TryParse(ref NavigationPacket packet, out NativeNavdata navigationData)
{
byte[] data = packet.Data;
navigationData = new NativeNavdata();
if (data.Length < sizeof (navdata_t))
return false;
fixed (byte* pData = &data[0])
{
navdata_t navdata_t = *(navdata_t*) pData;
if (navdata_t.header == NavdataHeader)
{
navigationData.ardrone_state = (def_ardrone_state_mask_t) navdata_t.ardrone_state;
int offset = sizeof (navdata_t);
while (offset < data.Length)
{
var option = (navdata_option_t*) (pData + offset);
ProcessOption(option, ref navigationData);
offset += option->size;
}
uint dataCheckSum = CalculateChecksum(data);
if (navigationData.cks.cks == dataCheckSum)
{
return true;
}
}
}
return false;
}
private static unsafe void ProcessOption(navdata_option_t* option, ref NativeNavdata navigationData)
{
var tag = (navdata_tag_t) option->tag;
switch (tag)
{
case navdata_tag_t.NAVDATA_DEMO_TAG:
navigationData.demo = *(navdata_demo_t*) option;
break;
case navdata_tag_t.NAVDATA_TIME_TAG:
navigationData.time = *(navdata_time_t*) option;
break;
case navdata_tag_t.NAVDATA_RAW_MEASURES_TAG:
navigationData.raw_measures = *(navdata_raw_measures_t*) option;
break;
case navdata_tag_t.NAVDATA_PHYS_MEASURES_TAG:
navigationData.phys_measures = *(navdata_phys_measures_t*) option;
break;
case navdata_tag_t.NAVDATA_GYROS_OFFSETS_TAG:
navigationData.gyros_offsets = *(navdata_gyros_offsets_t*) option;
break;
case navdata_tag_t.NAVDATA_EULER_ANGLES_TAG:
navigationData.euler_angles = *(navdata_euler_angles_t*) option;
break;
case navdata_tag_t.NAVDATA_REFERENCES_TAG:
navigationData.references = *(navdata_references_t*) option;
break;
case navdata_tag_t.NAVDATA_TRIMS_TAG:
navigationData.trims = *(navdata_trims_t*) option;
break;
case navdata_tag_t.NAVDATA_RC_REFERENCES_TAG:
navigationData.rc_references = *(navdata_rc_references_t*) option;
break;
case navdata_tag_t.NAVDATA_PWM_TAG:
navigationData.pwm = *(navdata_pwm_t*) option;
break;
case navdata_tag_t.NAVDATA_ALTITUDE_TAG:
navigationData.altitude = *(navdata_altitude_t*) option;
break;
case navdata_tag_t.NAVDATA_VISION_RAW_TAG:
navigationData.vision_raw = *(navdata_vision_raw_t*) option;
break;
case navdata_tag_t.NAVDATA_VISION_OF_TAG:
navigationData.vision_of_tag = *(navdata_vision_of_t*) option;
break;
case navdata_tag_t.NAVDATA_VISION_TAG:
navigationData.vision = *(navdata_vision_t*) option;
break;
case navdata_tag_t.NAVDATA_VISION_PERF_TAG:
navigationData.vision_perf = *(navdata_vision_perf_t*) option;
break;
case navdata_tag_t.NAVDATA_TRACKERS_SEND_TAG:
navigationData.trackers_send = *(navdata_trackers_send_t*) option;
break;
case navdata_tag_t.NAVDATA_VISION_DETECT_TAG:
navigationData.vision_detect = *(navdata_vision_detect_t*) option;
break;
case navdata_tag_t.NAVDATA_WATCHDOG_TAG:
navigationData.watchdog = *(navdata_watchdog_t*) option;
break;
case navdata_tag_t.NAVDATA_ADC_DATA_FRAME_TAG:
navigationData.adc_data_frame = *(navdata_adc_data_frame_t*) option;
break;
case navdata_tag_t.NAVDATA_VIDEO_STREAM_TAG:
navigationData.video_stream = *(navdata_video_stream_t*) option;
break;
case navdata_tag_t.NAVDATA_GAMES_TAG:
navigationData.games = *(navdata_games_t*) option;
break;
case navdata_tag_t.NAVDATA_PRESSURE_RAW_TAG:
navigationData.pressure_raw = *(navdata_pressure_raw_t*) option;
break;
case navdata_tag_t.NAVDATA_MAGNETO_TAG:
navigationData.magneto = *(navdata_magneto_t*) option;
break;
case navdata_tag_t.NAVDATA_WIND_TAG:
navigationData.wind_speed = *(navdata_wind_speed_t*) option;
break;
case navdata_tag_t.NAVDATA_KALMAN_PRESSURE_TAG:
navigationData.kalman_pressure = *(navdata_kalman_pressure_t*) option;
break;
case navdata_tag_t.NAVDATA_HDVIDEO_STREAM_TAG:
navigationData.hdvideo_stream = *(navdata_hdvideo_stream_t*) option;
break;
case navdata_tag_t.NAVDATA_WIFI_TAG:
navigationData.wifi = *(navdata_wifi_t*) option;
break;
case navdata_tag_t.NAVDATA_ZIMMU_3000_TAG:
// do nothing
break;
case navdata_tag_t.NAVDATA_NUM_TAGS:
// do nothing
break;
case navdata_tag_t.NAVDATA_CKS_TAG:
navigationData.cks = *(navdata_cks_t*) option;
break;
default:
throw new ArgumentOutOfRangeException();
}
}