sampler.py 文件源码

def __init__(self, sr=22050, backend='sounddevice'):
        """
        :param int sr: samplerate used - all sounds added to the sampler will automatically be resampled if needed (- his can be a CPU consumming task, try to use sound with all identical sampling rate if possible.
        :param str backend: backend used for playing sound. Can be either 'sounddevice' or 'dummy'.

        """
        self.sr = sr
        self.sounds = []

        self.chunks = Queue(1)
        self.chunk_available = Condition()

        if backend == 'dummy':
            from .dummy_stream import DummyStream
            self.BackendStream = DummyStream
        elif backend == 'sounddevice':
            from sounddevice import OutputStream
            self.BackendStream = OutputStream
        else:
            raise ValueError("Backend can either be 'sounddevice' or 'dummy'")

        # TODO: use a process instead?
        self.play_thread = Thread(target=self.run)
        self.play_thread.daemon = True
        self.play_thread.start()