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#!/usr/bin/env python
import argparse
import bisect
from argaze import GazeFeatures
from argaze.TobiiGlassesPro2 import TobiiEntities, TobiiVideo, TobiiData
import numpy
import cv2 as cv
def main():
"""
Replay Tobii segment video
"""
# manage arguments
parser = argparse.ArgumentParser(description=main.__doc__.split('-')[0])
parser.add_argument('-s', '--segment_path', metavar='SEGMENT_PATH', type=str, default=None, help='segment path')
parser.add_argument('-r', '--time_range', metavar=('START_TIME', 'END_TIME'), nargs=2, type=float, default=(0., None), help='start and end time (in second)')
args = parser.parse_args()
if args.segment_path != None:
# Load a tobii segment
tobii_segment = TobiiEntities.TobiiSegment(args.segment_path, int(args.time_range[0] * 1000000), int(args.time_range[1] * 1000000) if args.time_range[1] != None else None)
# Load a tobii segment video
tobii_segment_video = tobii_segment.load_video()
print(f'Video duration: {tobii_segment_video.get_duration()/1000000}, width: {tobii_segment_video.get_width()}, height: {tobii_segment_video.get_height()}')
# Load a tobii segment data
tobii_segment_data = tobii_segment.load_data()
print(f'Data keys: {tobii_segment_data.keys()}')
# Access to timestamped gaze position data buffer
tobii_ts_gaze_positions = tobii_segment_data.gidx_l_gp
print(f'{len(tobii_ts_gaze_positions)} gaze positions loaded')
# Video and data replay loop
try:
# Iterate on video frames activating video / data synchronisation through vts data buffer
for video_ts, video_frame in tobii_segment_video.frames(tobii_segment_data.vts):
try:
# Get closest gaze position before video timestamp and remove all gaze positions before
closest_gaze_ts, closest_gaze_position = tobii_ts_gaze_positions.pop_first_until(video_ts)
# Draw video synchronized gaze pointer
pointer = (int(closest_gaze_position.gp[0] * video_frame.width), int(closest_gaze_position.gp[1] * video_frame.height))
cv.circle(video_frame.matrix, pointer, 4, (0, 255, 255), -1)
# When expected values can't be found
except (KeyError, AttributeError, ValueError):
pass
# Close window using 'Esc' key
if cv.waitKey(1) == 27:
break
cv.imshow(f'Segment {tobii_segment.get_id()} video', video_frame.matrix)
# Exit on 'ctrl+C' interruption
except KeyboardInterrupt:
pass
# Stop frame display
cv.destroyAllWindows()
if __name__ == '__main__':
main()
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