audiostream.py 文件源码

def __init__(self, window_size, segments_buf=None):
        self._window_size = window_size
        if segments_buf is None:
            segments_buf = int(SAMPLE_RATE / window_size)
        self._segments_buf = segments_buf

        self._thresholding_window_size = THRESHOLD_WINDOW_SIZE
        assert self._thresholding_window_size <= segments_buf

        self._last_spectrum = np.zeros(window_size, dtype=np.int16)
        self._last_flux = deque(
            np.zeros(segments_buf, dtype=np.int16), segments_buf)
        self._last_prunned_flux = 0

        self._hanning_window = np.hanning(window_size)
        # The zeros which will be used to double each segment size
        self._inner_pad = np.zeros(window_size)

        # To ignore the first peak just after starting the application
        self._first_peak = True