def open(self):
# IMPORTANT, if inherit, call this at the end
# the thread need to be start when device is ready
logger.info("Open media %s" % self.get_name())
if self.is_client_manager:
return True
if self.thread:
return False
self.thread = ThreadMedia(self, self._cb_publish, self._rotate_param)
self.thread.start()
return True
class Media(PoolParam):
def __init__(self):
super(Media, self).__init__()
# TODO change sleep_time dependant of real fps desire
self.fps = 30.0
self.sleep_time = 1 / self.fps
self.lst_observer = []
self.thread = None
self.media_name = None
self.active_loop = True
self.is_client_manager = False
# set publisher
self._publisher = None
self.status = None
self.set_status(MediaStatus.close)
# add generic param
self._rotate_param = Param('angle', 0, max_v=3, min_v=0)
desc = "Rotate the picture. 0 - 90 - 180 - 270"
self._rotate_param.set_description(desc)
self._rotate_param.add_group("Generic")
def destroy(self):
self.destroy_param()
def set_publisher(self, publisher):
self._publisher = publisher
publisher.register("media.%s" % self.media_name)
self._cb_publish = self._get_cb_publisher()
def set_is_client_manager(self, is_client_manager):
self.is_client_manager = is_client_manager
def is_media_streaming(self):
# complete it into media_streaming and media_video
pass
def is_media_video(self):
# complete it into media_streaming and media_video
pass
def get_type_media(self):
# complete it into media_streaming and media_video
# type is Video or Streaming
pass
def get_name(self):
return self.media_name
def get_status(self):
return self.status
def set_status(self, status):
if not status in MediaStatus.lst_status:
msg = "Status %s in media %s not supported." % (status,
self.get_name())
logger.error(msg)
self.status = MediaStatus.close
if self.status != status and self._cb_publish:
self.status = status
self._cb_publish({"status": status})
def __iter__(self):
return self
def get_total_frames(self):
return -1
def get_info(self):
fps = int(1 / self.sleep_time) if self.thread else -1
return {
"fps": fps,
"nb_frame": self.get_total_frames(),
"status": self.get_status()
}
def serialize(self, is_config=False):
return super(Media, self).serialize(is_config=is_config)
def deserialize(self, data):
return super(Media, self).deserialize(data)
def get_real_fps(self):
if self.thread:
return self.thread.get_fps()
return -1
def open(self):
# IMPORTANT, if inherit, call this at the end
# the thread need to be start when device is ready
logger.info("Open media %s" % self.get_name())
if self.is_client_manager:
return True
if self.thread:
return False
self.thread = ThreadMedia(self, self._cb_publish, self._rotate_param)
self.thread.start()
return True
def next(self):
# edit me in child
pass
def reset(self):
# restore the media
pass
def close(self):
logger.info("Close media %s" % self.get_name())
self._remove_cb_publisher()
self.stop_pooling_all_param()
if self.is_client_manager:
return True
if not self.thread:
return False
self.thread.stop()
self.thread = None
self.status = MediaStatus.close
return True
def initialize(self):
pass
def reload(self, param=None):
# TODO do observer and check parameter
# ignore param_name and value, it's parameter from pool_param
if not self.thread:
return True
status = self.close()
if not status:
return False
# TODO force re-init filterchain
self.initialize()
return self.open()
def change_sleep_time(self, sleep_time):
self.sleep_time = sleep_time
def add_observer(self, observer):
start_media = False
if not self.lst_observer:
start_media = True
self.lst_observer.append(observer)
if start_media:
self.open()
def remove_observer(self, observer):
if observer in self.lst_observer:
self.lst_observer.remove(observer)
else:
logger.warning("Observer missing into media %s" % self.get_name())
if not self.lst_observer:
self.close()
def notify_observer(self, image):
# be sure the image is different for all observer
for observer in self.lst_observer:
observer(np.copy(image))
def _add_notification_param(self, param):
# send from publisher
if not self._publisher:
return
data = {"media": self.media_name, "param": param.serialize()}
json_data = json.dumps(data)
self._publisher.publish(keys.get_key_media_param(), json_data)
def set_loop_enable(self, enable):
self.active_loop = enable
def _get_cb_publisher(self):
if not self._publisher:
return
key = self.get_name()
return self._publisher.get_callback_publish("media.%s" % key)
def _remove_cb_publisher(self):
if not self._publisher:
return
