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# Synchronise video and gaze
vts_ts, vts = tobii_vts.pop_first()
vts_offset = (vts_ts - vts.vts) / 1000
print(f'Init >>> vts_offset = {vts_offset}')
last_gaze_position_index = -1
closest_gaze_position_ts, closest_gaze_position = None, None
last_fixation_index = -1
closest_fixation_ts, closest_fixation = None, None
for frame_ts, frame in tobii_segment_video.frames():
frame_ts = frame_ts / 1000
if frame_ts > vts.vts / 1000:
if len(tobii_vts) > 0:
vts_ts, vts = tobii_vts.pop_first()
vts_offset = (vts_ts - vts.vts) / 1000
print(f'{frame_ts / 1000} >>> New vts_offset = {vts_offset / 1000}')
# Find closest gaze position
closest_index = bisect.bisect_left(list(generic_ts_gaze_positions.keys()), frame_ts + vts_offset) - 1
if closest_index > last_gaze_position_index:
# pop data until closest_index
while last_gaze_position_index <= closest_index:
closest_gaze_position_ts, closest_gaze_position = generic_ts_gaze_positions.pop_first()
last_gaze_position_index += 1
print(f'{frame_ts / 1000} *** New closest gaze position: index = {closest_index}, ts = {closest_gaze_position_ts / 1000}, {closest_gaze_position}')
# Find closest fixation
closest_index = bisect.bisect_left(list(fixation_analyser.fixations.keys()), frame_ts + vts_offset) - 1
if closest_index > last_fixation_index:
# pop data until closest_index
while last_fixation_index <= closest_index:
closest_ts, closest_fixation = fixation_analyser.fixations.pop_first()
last_fixation_index += 1
print(f'{frame_ts / 1000} /// New closest fixation: index= {closest_index}, ts = {closest_ts / 1000}, {closest_fixation}')
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