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#!/usr/bin/env python
import argparse
import os, time
from argaze import DataStructures, GazeFeatures
from argaze.TobiiGlassesPro2 import *
import cv2 as cv
import numpy
def main():
"""
Capture video camera and gaze data streams and synchronise them.
"""
# Manage arguments
parser = argparse.ArgumentParser(description=main.__doc__.split('-')[0])
parser.add_argument('-t', '--tobii_ip', metavar='TOBII_IP', type=str, default='192.168.1.12', help='tobii glasses ip')
args = parser.parse_args()
# Create tobii controller
tobii_controller = TobiiController.TobiiController(args.tobii_ip, 'myProject', 'mySelf')
# Calibrate tobii glasses
tobii_controller.calibrate()
# Enable tobii data stream
tobii_data_stream = tobii_controller.enable_data_stream()
# Enable tobii video stream
tobii_video_stream = tobii_controller.enable_video_stream()
# Start streaming
tobii_controller.start_streaming()
# Live video stream capture loop
try:
past_gaze_positions = DataStructures.TimeStampedBuffer()
while tobii_video_stream.is_alive():
video_ts, video_frame = tobii_video_stream.read()
try:
# Read data stream
data_stream = tobii_data_stream.read()
# Store received gaze positions
past_gaze_positions.append(data_stream.gidx_l_gp)
# Get last gaze position before video timestamp and remove all former gaze positions
earliest_ts, earliest_gaze_position = past_gaze_positions.pop_first_until(video_ts)
# Draw gaze position
gaze_position = (int(earliest_gaze_position.gp[0] * video_frame.width), int(earliest_gaze_position.gp[1] * video_frame.height))
cv.circle(video_frame.matrix, gaze_position, 4, (0, 255, 255), -1)
# Wait for gaze position
except (AttributeError, ValueError):
continue
# Close window using 'Esc' key
if cv.waitKey(1) == 27:
break
cv.imshow(f'Live Tobii Camera', video_frame.matrix)
# Exit on 'ctrl+C' interruption
except KeyboardInterrupt:
pass
# Stop frame display
cv.destroyAllWindows()
# Stop streaming
tobii_controller.stop_streaming()
if __name__ == '__main__':
main()
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