From 84d9eeb6d8c78991f89720b836254497becd1513 Mon Sep 17 00:00:00 2001
From: Théo de la Hogue
Date: Fri, 21 Jun 2024 03:14:34 +0200
Subject: Refactoring waiting in Tobii post processing context.

---
 src/argaze/utils/contexts/TobiiProGlasses2.py | 49 ++++++++++++++++-----------
 1 file changed, 30 insertions(+), 19 deletions(-)

diff --git a/src/argaze/utils/contexts/TobiiProGlasses2.py b/src/argaze/utils/contexts/TobiiProGlasses2.py
index 1f7ae13..061813e 100644
--- a/src/argaze/utils/contexts/TobiiProGlasses2.py
+++ b/src/argaze/utils/contexts/TobiiProGlasses2.py
@@ -1154,9 +1154,6 @@ class PostProcessing(ArFeatures.PostProcessingContext):
 			"s": 1e3
 		}
 
-		# Initialize inconsistent timestamp monitoring
-		self.__last_data_ts = None
-
 	@property
 	def segment(self) -> str:
 		"""Path to segment folder."""
@@ -1257,6 +1254,10 @@ class PostProcessing(ArFeatures.PostProcessingContext):
 	def __read(self):
 		"""Iterate on video images and their related data."""
 
+		last_video_ts = None
+		last_data_ts = None
+
+		# Process video
 		for video_ts, video_image, data_list in self:
 
 			# Check pause event (and stop event)
@@ -1331,15 +1332,6 @@ class PostProcessing(ArFeatures.PostProcessingContext):
 
 					data_ts = int(self.__sync_ts + data_ts - self.__sync_data_ts)
 
-				# Catch inconstistent timestamps
-				if self.__last_data_ts is not None:
-
-					if data_ts - self.__last_data_ts <= 0:
-
-						logging.error('! %i gaze position more recent than the previous one', data_ts)
-
-				last_data_ts = data_ts
-
 				# Process gaze positions
 				match data_object_type:
 
@@ -1351,19 +1343,41 @@ class PostProcessing(ArFeatures.PostProcessingContext):
 						if data_object.validity == 0:
 
 							# Process timestamped gaze position
-							self._process_gaze_position(
-								timestamp=data_ts,
-								x=int(data_object.value[0] * width),
-								y=int(data_object.value[1] * height))
+							self._process_gaze_position(timestamp=data_ts, x=int(data_object.value[0] * width), y=int(data_object.value[1] * height))
 
 						else:
 
 							# Process empty gaze position
 							self._process_gaze_position(timestamp=data_ts)
 
+						# Wait to get a realtime replay
+						# TODO: Add attribute to disable realtime replay
+						# TODO: Consider gaze position processing time to adapt waiting time
+						if last_data_ts is not None:
+
+							# Catch inconstistent gaze position timestamps
+							if data_ts > last_data_ts:
+
+								time.sleep(1e-3) #time.sleep( (data_ts - last_data_ts) * 1e-3 )
+
+							else:
+
+								logging.error('! current gaze position at %i is older than last gaze position at %i', data_ts, last_data_ts)
+							
+						last_data_ts = data_ts
+
 			# Update progression
 			self.__progression = (video_ts - self.start) / self.__duration
 
+			# Wait to get a realtime replay
+			# TODO: Add attribute to disable realtime replay
+			# TODO: Consider camera image processing time to adapt waiting time
+			if last_video_ts is not None:
+			
+				time.sleep(1e-2) #time.sleep( (video_ts - last_video_ts) * 1e-3 )
+				
+			last_video_ts = video_ts
+
 		# Set stop event ourself
 		self._stop_event.set()
 	
@@ -1403,9 +1417,6 @@ class PostProcessing(ArFeatures.PostProcessingContext):
 			data_list.append((next_data_ts, next_data_object, next_data_object_type))
 			next_data_ts, next_data_object, next_data_object_type = self.__next_data()
 
-		# TODO: Add attribute to disable realtime replay
-		time.sleep( (next_video_ts - self.__video_ts) * 1e-3 )
-
 		# Output video and data
 		output = self.__video_ts, self.__video_image, data_list
 
-- 
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