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""" |
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* PyDMXControl: A Python 3 module to control DMX using OpenDMX or uDMX. |
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* Featuring fixture profiles, built-in effects and a web control panel. |
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* <https://github.com/MattIPv4/PyDMXControl/> |
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* Copyright (C) 2022 Matt Cowley (MattIPv4) ([email protected]) |
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""" |
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from queue import Queue, Empty |
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from threading import Thread |
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from typing import List |
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from ._Controller import Controller |
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class TransmittingController(Controller): |
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def __init__(self, *args, **kwargs): |
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super().__init__(*args, **kwargs) |
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# Create the frame queue |
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self.__queue = Queue() |
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# Track the thread |
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self.__thread = None |
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# Check if auto-start is enabled |
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self.__auto = True |
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if 'autostart' in kwargs: |
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if isinstance(kwargs['autostart'], bool): |
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self.__auto = kwargs['autostart'] |
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# Run if auto-start |
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if self.__auto: |
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self.run() |
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def _connect(self): |
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pass |
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def _close(self): |
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pass |
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def _transmit(self, frame: List[int], first: int): |
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pass |
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def __runner(self): |
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while True: |
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# Get next item in queue, or wait for item |
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item = self.__queue.get() |
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# None is passed to end the runner |
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if item is None: |
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self.__queue.task_done() |
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break |
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# Transmit current frame |
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self._transmit(*item) |
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self.__queue.task_done() |
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# Drain any excess frames if transmission is slower than frame rate |
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self.__drain() |
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def __send(self): |
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self.__queue.put_nowait(( |
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self.get_frame(), # Get the DMX channel frame |
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self.first_channel if self.dynamic_frame else 1, # Get the first channel if frame is dynamic |
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)) |
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def __drain(self): |
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while not self.__queue.empty(): |
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try: |
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self.__queue.get(False) |
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except Empty: |
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continue |
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self.__queue.task_done() |
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def close(self): |
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# Drain and stop the thread |
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if self.__thread: |
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self.__drain() |
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self.__queue.put(None) |
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self.__queue.join() |
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self.__thread = None |
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# Close the device |
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self._close() |
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# Parent close |
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super().close() |
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def run(self): |
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# Connect the device |
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self._connect() |
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# Start the thread |
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self.__thread = Thread(target=self.__runner, daemon=True) |
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self.__thread.start() |
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# Add the transmission of data to the ticker |
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self.ticker.add_callback(self.__send, 0) |
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