mcelp 1.0.1

Mitsubishi CELP speech codec: a 3.6 kbit/s speech encoder and decoder
Documentation 
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//! Windows and grids the linear prediction analysis reads.

/// Lag window, ten 32-bit factors stored as high/low word pairs.
pub static LAG_WINDOW: [i16; 20] = [
    32728, 23801, 32619, -31049, 32438, -4138, 32187, -13861, 31867, -17136, 31480, -7574, 31029,
    -16770, 30517, 14750, 29946, -26569, 29321, 29489,
];

/// The 400-sample analysis window, Q15.
pub static ANALYSIS_WINDOW: [i16; 400] = [
    2621, 2622, 2624, 2627, 2631, 2636, 2642, 2650, 2658, 2668, 2679, 2691, 2704, 2718, 2734, 2750,
    2768, 2787, 2807, 2828, 2850, 2874, 2898, 2924, 2951, 2979, 3008, 3038, 3069, 3102, 3135, 3170,
    3205, 3242, 3280, 3319, 3359, 3400, 3443, 3486, 3530, 3576, 3623, 3670, 3719, 3769, 3820, 3872,
    3925, 3979, 4034, 4090, 4147, 4205, 4264, 4325, 4386, 4448, 4511, 4576, 4641, 4707, 4774, 4843,
    4912, 4982, 5053, 5125, 5198, 5272, 5347, 5423, 5500, 5578, 5657, 5736, 5817, 5898, 5981, 6064,
    6148, 6233, 6319, 6406, 6493, 6582, 6671, 6761, 6852, 6944, 7036, 7130, 7224, 7319, 7415, 7511,
    7609, 7707, 7806, 7905, 8006, 8107, 8209, 8311, 8415, 8519, 8623, 8729, 8835, 8942, 9049, 9157,
    9266, 9375, 9485, 9596, 9707, 9819, 9931, 10044, 10158, 10272, 10387, 10502, 10618, 10735,
    10852, 10969, 11087, 11206, 11324, 11444, 11564, 11684, 11805, 11926, 12048, 12170, 12293,
    12416, 12539, 12663, 12787, 12912, 13037, 13162, 13288, 13414, 13540, 13667, 13793, 13921,
    14048, 14176, 14304, 14432, 14561, 14690, 14819, 14948, 15077, 15207, 15337, 15467, 15597,
    15727, 15858, 15988, 16119, 16250, 16381, 16512, 16643, 16775, 16906, 17037, 17169, 17300,
    17432, 17563, 17695, 17826, 17958, 18089, 18221, 18352, 18484, 18615, 18746, 18877, 19008,
    19139, 19270, 19401, 19532, 19662, 19793, 19923, 20053, 20183, 20312, 20442, 20571, 20700,
    20829, 20957, 21085, 21214, 21341, 21469, 21596, 21723, 21849, 21976, 22102, 22227, 22353,
    22478, 22602, 22726, 22850, 22973, 23097, 23219, 23341, 23463, 23584, 23705, 23826, 23946,
    24065, 24184, 24302, 24420, 24538, 24655, 24771, 24887, 25002, 25117, 25231, 25345, 25458,
    25570, 25682, 25794, 25904, 26014, 26124, 26232, 26340, 26448, 26555, 26661, 26766, 26871,
    26975, 27078, 27181, 27283, 27384, 27484, 27584, 27683, 27781, 27878, 27975, 28070, 28166,
    28260, 28353, 28446, 28538, 28628, 28719, 28808, 28896, 28984, 29071, 29157, 29242, 29326,
    29409, 29491, 29573, 29653, 29733, 29811, 29889, 29966, 30042, 30117, 30191, 30264, 30336,
    30407, 30478, 30547, 30615, 30682, 30749, 30814, 30878, 30941, 31004, 31065, 31125, 31184,
    31242, 31300, 31356, 31411, 31465, 31518, 31570, 31621, 31670, 31719, 31767, 31813, 31859,
    31903, 31947, 31989, 32030, 32070, 32109, 32147, 32184, 32220, 32254, 32288, 32320, 32352,
    32382, 32411, 32439, 32465, 32491, 32516, 32539, 32561, 32582, 32602, 32621, 32639, 32656,
    32671, 32685, 32699, 32711, 32722, 32731, 32740, 32747, 32754, 32759, 32763, 32766, 32767,
    32767, 32742, 32666, 32538, 32359, 32130, 31851, 31522, 31144, 30717, 30243, 29721, 29152,
    28538, 27880, 27178, 26434, 25648, 24822, 23958, 23056, 22118, 21145, 20140, 19103, 18036,
    16941, 15820, 14674, 13505, 12315, 11106, 9879, 8637, 7382, 6115, 4838, 3554, 2264, 971,
];

/// Points on the unit circle the root search steps through.
pub static ROOT_GRID: [i16; 61] = [
    32760, 32723, 32588, 32365, 32052, 31651, 31164, 30592, 29935, 29197, 28378, 27482, 26510,
    25466, 24351, 23170, 21926, 20622, 19261, 17847, 16384, 14876, 13328, 11743, 10126, 8481, 6813,
    5126, 3425, 1715, 0, -1715, -3425, -5126, -6813, -8481, -10126, -11743, -13328, -14876, -16384,
    -17847, -19261, -20622, -21926, -23170, -24351, -25466, -26510, -27482, -28378, -29197, -29935,
    -30592, -31164, -31651, -32052, -32365, -32588, -32723, -32760,
];