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publish events like a change feed

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This commit is contained in:
Blake Blackshear 2020-11-25 12:06:01 -06:00
parent b39da3ee01
commit eef70e434b
1 changed files with 22 additions and 14 deletions
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36
frigate/object_processing.py
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@ -72,6 +72,7 @@ class TrackedObject():
self.top_score = self.computed_score = 0.0
self.thumbnail_data = None
self.frame = None
self.previous = None
self._snapshot_jpg_time = 0
ret, jpg = cv2.imencode('.jpg', np.zeros((300,300,3), np.uint8))
self._snapshot_jpg = jpg.tobytes()
@ -97,6 +98,7 @@ class TrackedObject():
return median(scores)
def update(self, current_frame_time, obj_data):
previous = self.to_dict()
self.obj_data.update(obj_data)
# if the object is not in the current frame, add a 0.0 to the score history
if self.obj_data['frame_time'] != current_frame_time:
@ -115,7 +117,10 @@ class TrackedObject():
if not self.false_positive:
# determine if this frame is a better thumbnail
if self.thumbnail_data is None or is_better_thumbnail(self.thumbnail_data, self.obj_data, self.camera_config.frame_shape):
if (
self.thumbnail_data is None
or is_better_thumbnail(self.thumbnail_data, self.obj_data, self.camera_config.frame_shape)
):
self.thumbnail_data = {
'frame_time': self.obj_data['frame_time'],
'box': self.obj_data['box'],
@ -123,6 +128,7 @@ class TrackedObject():
'region': self.obj_data['region'],
'score': self.obj_data['score']
}
self.previous = previous
# check zones
current_zones = []
@ -302,7 +308,7 @@ class CameraState():
# call event handlers
for c in self.callbacks['start']:
c(self.name, new_obj)
c(self.name, new_obj, frame_time)
for id in updated_ids:
updated_obj = self.tracked_objects[id]
@ -315,7 +321,7 @@ class CameraState():
# call event handlers
for c in self.callbacks['update']:
c(self.name, updated_obj)
c(self.name, updated_obj, frame_time)
for id in removed_ids:
# publish events to mqtt
@ -323,7 +329,7 @@ class CameraState():
if not 'end_time' in removed_obj.obj_data:
removed_obj.obj_data['end_time'] = frame_time
for c in self.callbacks['end']:
c(self.name, removed_obj)
c(self.name, removed_obj, frame_time)
# TODO: can i switch to looking this up and only changing when an event ends?
# maybe make an api endpoint that pulls the thumbnail from the file system?
@ -342,11 +348,11 @@ class CameraState():
or (now - current_best.thumbnail_data['frame_time']) > self.camera_config.best_image_timeout):
self.best_objects[object_type] = obj
for c in self.callbacks['snapshot']:
c(self.name, self.best_objects[object_type])
c(self.name, self.best_objects[object_type], frame_time)
else:
self.best_objects[object_type] = obj
for c in self.callbacks['snapshot']:
c(self.name, self.best_objects[object_type])
c(self.name, self.best_objects[object_type], frame_time)
# update overall camera state for each object type
obj_counter = Counter()
@ -369,7 +375,7 @@ class CameraState():
for c in self.callbacks['object_status']:
c(self.name, obj_name, 'OFF')
for c in self.callbacks['snapshot']:
c(self.name, self.best_objects[obj_name])
c(self.name, self.best_objects[obj_name], frame_time)
# cleanup thumbnail frame cache
current_thumb_frames = set([obj.thumbnail_data['frame_time'] for obj in self.tracked_objects.values() if not obj.false_positive])
@ -398,22 +404,24 @@ class TrackedObjectProcessor(threading.Thread):
self.camera_states: Dict[str, CameraState] = {}
self.frame_manager = SharedMemoryFrameManager()
def start(camera, obj: TrackedObject):
self.client.publish(f"{self.topic_prefix}/{camera}/events/start", json.dumps(obj.to_dict()), retain=False)
def start(camera, obj: TrackedObject, current_frame_time):
self.event_queue.put(('start', camera, obj.to_dict()))
def update(camera, obj: TrackedObject):
pass
def update(camera, obj: TrackedObject, current_frame_time):
if not obj.thumbnail_data is None and obj.thumbnail_data['frame_time'] == current_frame_time:
message = { 'before': obj.previous, 'after': obj.to_dict() }
self.client.publish(f"{self.topic_prefix}/events", json.dumps(message), retain=False)
def end(camera, obj: TrackedObject):
self.client.publish(f"{self.topic_prefix}/{camera}/events/end", json.dumps(obj.to_dict()), retain=False)
def end(camera, obj: TrackedObject, current_frame_time):
message = { 'before': obj.previous, 'after': obj.to_dict() }
self.client.publish(f"{self.topic_prefix}/events", json.dumps(message), retain=False)
if self.config.cameras[camera].save_clips.enabled and not obj.false_positive:
thumbnail_file_name = f"{camera}-{obj.obj_data['id']}.jpg"
with open(os.path.join(self.config.save_clips.clips_dir, thumbnail_file_name), 'wb') as f:
f.write(obj.get_jpg_bytes())
self.event_queue.put(('end', camera, obj.to_dict(include_thumbnail=True)))
def snapshot(camera, obj: TrackedObject):
def snapshot(camera, obj: TrackedObject, current_frame_time):
self.client.publish(f"{self.topic_prefix}/{camera}/{obj.obj_data['label']}/snapshot", obj.get_jpg_bytes(), retain=True)
def object_status(camera, object_name, status):