def __reversed__(self):
with self.stream.lock:
pos = self.stream._length
for item, frame in super(PiCameraDequeHack, self.stream._data).__reversed__():
if frame:
frame = PiVideoFrame(
index=frame.index,
frame_type=frame.frame_type,
frame_size=frame.frame_size,
video_size=pos,
split_size=pos,
timestamp=frame.timestamp,
complete=frame.complete,
)
if pos - frame.frame_size >= 0:
yield frame
pos -= len(item)
def __reversed__(self):
with self.stream().lock:
pos = self.stream()._length
for item, frame in self.stream()._data.iter_both(True):
if frame:
frame = PiVideoFrame(
index=frame.index,
frame_type=frame.frame_type,
frame_size=frame.frame_size,
video_size=pos,
split_size=pos,
timestamp=frame.timestamp,
complete=frame.complete,
)
if pos - frame.frame_size >= 0:
yield frame
pos -= len(item)
def __iter__(self):
with self.stream.lock:
pos = 0
for item, frame in super(PiCameraDequeHack, self.stream._data).__iter__():
pos += len(item)
if frame:
# Rewrite the video_size and split_size attributes according
# to the current position of the chunk
frame = PiVideoFrame(
index=frame.index,
frame_type=frame.frame_type,
frame_size=frame.frame_size,
video_size=pos,
split_size=pos,
timestamp=frame.timestamp,
complete=frame.complete,
)
# Only yield the frame meta-data if the start of the frame
# still exists in the stream
if pos - frame.frame_size >= 0:
yield frame