Function hamming_window

tools/audio/source/audio.cpp:291–299

}

VARP hamming_window(int n_fft, bool periodic, float alpha, float beta) {
    auto window     = _Input({n_fft}, NHWC);
    auto window_ptr = window->writeMap<float>();
    int N           = periodic ? n_fft : n_fft - 1;
    for (int n = 0; n < n_fft; ++n) {
        window_ptr[n] = alpha - beta * std::cos(2.0 * M_PI * n / N);
    }
    return window;
}

VARP hann_window(int n_fft, bool periodic) {
    auto window     = _Input({n_fft}, NHWC);