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#!/usr/bin/env python
import threading
import time
from argaze.TobiiGlassesPro2 import TobiiController
class TobiiDataThread(threading.Thread):
"""Handle data reception in a separate thread."""
def __init__(self, controller: TobiiController.TobiiController):
"""Initialise thread super class and prepare data reception."""
threading.Thread.__init__(self)
self.stop_event = threading.Event()
self.read_lock = threading.Lock()
self.controller = controller
self.fps = self.controller.get_et_freq()
self.sleep = 1./self.fps
self.__ac_buffer = []
self.__gy_buffer = []
self.__gp_buffer = []
self.__pts_buffer = []
self.__start_ts = 0
def __del__(self):
pass
def __get_ac(self, data):
ac_value = data['mems']['ac']['ac']
ac_ts = data['mems']['ac']['ts']
ac_data = {
'TIMESTAMP': ac_ts,
'TIME': (ac_ts - self.__start_ts) / 1000000.,
'X': ac_value[0],
'Y': ac_value[1],
'Z': ac_value[2]
}
return ac_data
def __get_gy(self, data):
gy_value = data['mems']['gy']['gy']
gy_ts = data['mems']['gy']['ts']
gy_data = {
'TIMESTAMP': gy_ts,
'TIME': (gy_ts - self.__start_ts) / 1000000.,
'X': gy_value[0],
'Y': gy_value[1],
'Z': gy_value[2]
}
return gy_data
def __get_gp(self, data):
gp_value = data['gp']['gp']
gp_ts = data['gp']['ts']
gp_data = {
'TIMESTAMP': gp_ts,
'TIME': (gp_ts - self.__start_ts) / 1000000.,
'X': gp_value[0],
'Y': gp_value[1]
}
return gp_data
def __get_pts(self, data):
pts_value = data['pts']['pts']
pts_ts = data['pts']['ts']
pts_data = {
'TIMESTAMP': pts_ts,
'TIME': (pts_ts - self.__start_ts) / 1000000.,
'PTS': pts_value
}
return pts_data
def run(self):
"""Data reception function."""
while not self.stop_event.isSet():
time.sleep(self.sleep)
self.read_lock.acquire()
data = self.controller.get_data()
# store only timestamped datas
if 'pts' in data:
pts_data = data['pts']
if 'pts' in pts_data:
ac_ts = data['mems']['ac']['ts']
gy_ts = data['mems']['gy']['ts']
gp_ts = data['gp']['ts']
pts_ts = pts_data['ts']
# get start timestamp
if self.__start_ts == 0:
# ignore -1 timestamp
valid_ts = []
for ts in [ac_ts, gy_ts, gp_ts, pts_ts]:
if ts > 0:
valid_ts.append(ts)
self.__start_ts = min(valid_ts)
#print(f'Tobii Data Frame: __start_ts = {self.__start_ts}')
#print(f'Tobii Data Frame: ac_ts = {ac_ts}, gy_ts = {gy_ts}, gp_ts = {gp_ts}, pts_ts = {pts_ts}')
# ignore -1 timestamp and filter repetitions
if ac_ts != -1:
if len(self.__ac_buffer) == 0:
self.__ac_buffer.append(self.__get_ac(data))
elif ac_ts != self.__ac_buffer[-1]['TIMESTAMP']:
self.__ac_buffer.append(self.__get_ac(data))
if gy_ts != -1:
if len(self.__gy_buffer) == 0:
self.__gy_buffer.append(self.__get_gy(data))
elif gy_ts != self.__gy_buffer[-1]['TIMESTAMP']:
self.__gy_buffer.append(self.__get_gy(data))
if gp_ts != -1:
if len(self.__gp_buffer) == 0:
self.__gp_buffer.append(self.__get_gp(data))
elif gp_ts != self.__gp_buffer[-1]['TIMESTAMP']:
self.__gp_buffer.append(self.__get_gp(data))
if pts_ts != -1:
if len(self.__pts_buffer) == 0:
self.__pts_buffer.append(self.__get_pts(data))
elif pts_ts != self.__pts_buffer[-1]['TIMESTAMP']:
self.__pts_buffer.append(self.__get_pts(data))
self.read_lock.release()
def read_accelerometer_data(self, timestamp: int = -1):
"""Get accelerometer data at a given timestamp.
**Returns:** accelerometer dictionary
```
{
'TIMESTAMP': int,
'TIME': int,
'X': float,
'Y': float,
'Z': float
}
```
"""
if len(self.__ac_buffer):
self.read_lock.acquire()
# TODO : find closest timestamp data
ac_data = self.__ac_buffer[-1].copy()
self.read_lock.release()
return ac_data
else:
return {}
def read_accelerometer_buffer(self):
"""Get accelerometer data buffer.
**Returns:** accelerometer dictionary array"""
self.read_lock.acquire()
ac_buffer = self.__ac_buffer.copy()
self.read_lock.release()
return ac_buffer
def read_gyroscope_data(self, timestamp: int = -1):
"""Get gyroscope data at a given timestamp.
**Returns:** gyroscope dictionary
```
{
'TIMESTAMP': int,
'TIME': int,
'X': float,
'Y': float,
'Z': float
}
```
"""
if len(self.__gy_buffer):
self.read_lock.acquire()
# TODO : find closest timestamp data
gy_data = self.__gy_buffer[-1].copy()
self.read_lock.release()
return gy_data
else:
return {}
def read_gyroscope_buffer(self):
"""Get gyroscope data buffer.
**Returns:** gyroscope dictionary array"""
self.read_lock.acquire()
gy_buffer = self.__gy_buffer.copy()
self.read_lock.release()
return gy_buffer
def read_gaze_data(self, timestamp: int = -1):
"""Get gaze data at a given timestamp.
**Returns:** gaze dictionary
```
{
'TIMESTAMP': int,
'TIME': int,
'X': float,
'Y': float
}
```
"""
if len(self.__gp_buffer):
self.read_lock.acquire()
# TODO : find closest timestamp data
gp_data = self.__gp_buffer[-1].copy()
self.read_lock.release()
return gp_data
else:
return {}
def read_gaze_buffer(self):
"""Get gaze data buffer.
**Returns:** gaze dictionary array"""
self.read_lock.acquire()
gp_buffer = self.__gp_buffer.copy()
self.read_lock.release()
return gp_buffer
def read_pts_data(self, timestamp: int = -1):
"""Get Presentation Time Stamp (pts) data at a given timestamp.
**Returns:** pts dictionary
```
{
'TIMESTAMP': int,
'TIME': int,
'PTS': int
}
```
"""
if len(self.__pts_buffer):
self.read_lock.acquire()
# TODO : find closest timestamp data
pts_data = self.__pts_buffer[-1].copy()
self.read_lock.release()
return pts_data
else:
return {}
def read_pts_buffer(self):
"""Get Presentation Time Stamp (pts) data buffer.
**Returns:** pts dictionary array"""
self.read_lock.acquire()
pts_buffer = self.__pts_buffer.copy()
self.read_lock.release()
return pts_buffer
def stop(self):
"""Stop data reception definitively."""
self.stop_event.set()
threading.Thread.join(self)
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