Function window

dali/test/python/test_audio_decoder_utils.py:28–31

(x)

    X = np.arange(n, dtype=np.float32)

    def window(x):
        x = 2 * x / length - 1
        np.clip(x, -1, 1, out=x)
        return 0.5 * (1 + np.cos(x * math.pi))

    wave = np.sin(X[:, np.newaxis] * (np.array(frequencies) * (2 * math.pi)))
    return wave * window(X)[:, np.newaxis]