def play(self) -> None:
if self.main.current_frame == self.main.current_output.end_frame:
return
if self.main.statusbar.label.text() == 'Ready':
self.main.statusbar.label.setText('Playing')
if not self.main.current_output.has_alpha:
play_buffer_size = int(
min(
self.main.PLAY_BUFFER_SIZE,
self.main.current_output.end_frame -
self.main.current_frame))
self.play_buffer = deque([], play_buffer_size)
for i in range(cast(int, self.play_buffer.maxlen)):
future = self.main.current_output.vs_output.get_frame_async(
int(self.main.current_frame + FrameInterval(i) +
FrameInterval(1)))
self.play_buffer.appendleft(future)
else:
play_buffer_size = int(
min(self.main.PLAY_BUFFER_SIZE,
(self.main.current_output.end_frame -
self.main.current_frame) * 2))
# buffer size needs to be even in case alpha is present
play_buffer_size -= play_buffer_size % 2
self.play_buffer = deque([], play_buffer_size)
for i in range(cast(int, self.play_buffer.maxlen) // 2):
frame = (self.main.current_frame + FrameInterval(i) +
FrameInterval(1))
future = self.main.current_output.vs_output.get_frame_async(
int(frame))
self.play_buffer.appendleft(future)
future = self.main.current_output.vs_alpha.get_frame_async(
int(frame))
self.play_buffer.appendleft(future)
if self.fps_unlimited_checkbox.isChecked() or self.main.DEBUG_PLAY_FPS:
self.play_timer.start(0)
if self.main.DEBUG_PLAY_FPS:
self.play_start_time = debug.perf_counter_ns()
self.play_start_frame = self.main.current_frame
else:
self.fps_timer.start(self.main.FPS_REFRESH_INTERVAL)
else:
self.play_timer.start(
round(1000 / self.main.current_output.play_fps))
def stop(self) -> None:
self.play_timer.stop()
if self.main.DEBUG_PLAY_FPS and self.play_start_time is not None:
self.play_end_time = debug.perf_counter_ns()
self.play_end_frame = self.main.current_frame
if self.main.statusbar.label.text() == 'Playing':
self.main.statusbar.label.setText('Ready')
for future in self.play_buffer:
future.add_done_callback(lambda future: future.result())
self.play_buffer.clear()
self.fps_history.clear()
self.fps_timer.stop()
if self.main.DEBUG_PLAY_FPS and self.play_start_time is not None:
time_interval = ((self.play_end_time - self.play_start_time)
/ 1_000_000_000)
frame_interval = self.play_end_frame - self.play_start_frame
logging.debug(
f'{time_interval:.3f} s, {frame_interval} frames, {int(frame_interval) / time_interval:.3f} fps')
self.play_start_time = None