def num_frames(self, num_samples):
        """
        Return the number of frames that will be used for a signal with the length of ``num_samples``.
        """
        return math.ceil(float(max(num_samples - self.frame_size, 0)) / float(self.hop_size)) + 1
Return the number of frames that will be used for a signal with the length of ``num_samples``.