mousiki 0.2.1

Pure Rust Opus codec.
Documentation 
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// Source: opus-c/celt/static_modes_float.h.
// Contains the canonical 48 kHz / 960 sample CELT mode tables used by the
// reference implementation. Keeping them as Rust statics lets the port mirror
// the C build without runtime mode construction.

use crate::celt::fft_twiddles_48000_960::FFT_TWIDDLES_48000_960;
use crate::celt::kiss_fft::KissFftState;
use crate::celt::mdct_twiddles_48000_960::MDCT_TWIDDLES_960;
use crate::celt::types::MdctLookup;

pub(crate) const LOG_N_400: [i16; 21] = [
    0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, 16, 16, 16, 21, 21, 24, 29, 34, 36,
];

pub(crate) const CACHE_INDEX_50: [i16; 105] = [
    -1, -1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 41, 41, 41, 82, 82, 123, 164, 200, 222, 0, 0, 0, 0,
    0, 0, 0, 0, 41, 41, 41, 41, 123, 123, 123, 164, 164, 240, 266, 283, 295, 41, 41, 41, 41, 41,
    41, 41, 41, 123, 123, 123, 123, 240, 240, 240, 266, 266, 305, 318, 328, 336, 123, 123, 123,
    123, 123, 123, 123, 123, 240, 240, 240, 240, 305, 305, 305, 318, 318, 343, 351, 358, 364, 240,
    240, 240, 240, 240, 240, 240, 240, 305, 305, 305, 305, 343, 343, 343, 351, 351, 370, 376, 382,
    387,
];

pub(crate) const CACHE_BITS_50: [u8; 392] = [
    40, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 40, 15, 23, 28, 31, 34, 36, 38, 39, 41, 42, 43, 44, 45, 46, 47,
    47, 49, 50, 51, 52, 53, 54, 55, 55, 57, 58, 59, 60, 61, 62, 63, 63, 65, 66, 67, 68, 69, 70, 71,
    71, 40, 20, 33, 41, 48, 53, 57, 61, 64, 66, 69, 71, 73, 75, 76, 78, 80, 82, 85, 87, 89, 91, 92,
    94, 96, 98, 101, 103, 105, 107, 108, 110, 112, 114, 117, 119, 121, 123, 124, 126, 128, 40, 23,
    39, 51, 60, 67, 73, 79, 83, 87, 91, 94, 97, 100, 102, 105, 107, 111, 115, 118, 121, 124, 126,
    129, 131, 135, 139, 142, 145, 148, 150, 153, 155, 159, 163, 166, 169, 172, 174, 177, 179, 35,
    28, 49, 65, 78, 89, 99, 107, 114, 120, 126, 132, 136, 141, 145, 149, 153, 159, 165, 171, 176,
    180, 185, 189, 192, 199, 205, 211, 216, 220, 225, 229, 232, 239, 245, 251, 21, 33, 58, 79, 97,
    112, 125, 137, 148, 157, 166, 174, 182, 189, 195, 201, 207, 217, 227, 235, 243, 251, 17, 35,
    63, 86, 106, 123, 139, 152, 165, 177, 187, 197, 206, 214, 222, 230, 237, 250, 25, 31, 55, 75,
    91, 105, 117, 128, 138, 146, 154, 161, 168, 174, 180, 185, 190, 200, 208, 215, 222, 229, 235,
    240, 245, 255, 16, 36, 65, 89, 110, 128, 144, 159, 173, 185, 196, 207, 217, 226, 234, 242, 250,
    11, 41, 74, 103, 128, 151, 172, 191, 209, 225, 241, 255, 9, 43, 79, 110, 138, 163, 186, 207,
    227, 246, 12, 39, 71, 99, 123, 144, 164, 182, 198, 214, 228, 241, 253, 9, 44, 81, 113, 142,
    168, 192, 214, 235, 255, 7, 49, 90, 127, 160, 191, 220, 247, 6, 51, 95, 134, 170, 203, 234, 7,
    47, 87, 123, 155, 184, 212, 237, 6, 52, 97, 137, 174, 208, 240, 5, 57, 106, 151, 192, 231, 5,
    59, 111, 158, 202, 243, 5, 55, 103, 147, 187, 224, 5, 60, 113, 161, 206, 248, 4, 65, 122, 175,
    224, 4, 67, 127, 182, 234,
];

pub(crate) const CACHE_CAPS_50: [u8; 168] = [
    224, 224, 224, 224, 224, 224, 224, 224, 160, 160, 160, 160, 185, 185, 185, 178, 178, 168, 134,
    61, 37, 224, 224, 224, 224, 224, 224, 224, 224, 240, 240, 240, 240, 207, 207, 207, 198, 198,
    183, 144, 66, 40, 160, 160, 160, 160, 160, 160, 160, 160, 185, 185, 185, 185, 193, 193, 193,
    183, 183, 172, 138, 64, 38, 240, 240, 240, 240, 240, 240, 240, 240, 207, 207, 207, 207, 204,
    204, 204, 193, 193, 180, 143, 66, 40, 185, 185, 185, 185, 185, 185, 185, 185, 193, 193, 193,
    193, 193, 193, 193, 183, 183, 172, 138, 65, 39, 207, 207, 207, 207, 207, 207, 207, 207, 204,
    204, 204, 204, 201, 201, 201, 188, 188, 176, 141, 66, 40, 193, 193, 193, 193, 193, 193, 193,
    193, 193, 193, 193, 193, 194, 194, 194, 184, 184, 173, 139, 65, 39, 204, 204, 204, 204, 204,
    204, 204, 204, 201, 201, 201, 201, 198, 198, 198, 187, 187, 175, 140, 66, 40,
];

const FFT_FACTORS_480: [usize; 10] = [5, 96, 3, 32, 4, 8, 2, 4, 4, 1];
const FFT_FACTORS_240: [usize; 8] = [5, 48, 3, 16, 4, 4, 4, 1];
const FFT_FACTORS_120: [usize; 8] = [5, 24, 3, 8, 2, 4, 4, 1];
const FFT_FACTORS_60: [usize; 6] = [5, 12, 3, 4, 4, 1];

const FFT_BITREV_480_USIZE: [usize; 480] = [
    0, 96, 192, 288, 384, 32, 128, 224, 320, 416, 64, 160, 256, 352, 448, 8, 104, 200, 296, 392,
    40, 136, 232, 328, 424, 72, 168, 264, 360, 456, 16, 112, 208, 304, 400, 48, 144, 240, 336, 432,
    80, 176, 272, 368, 464, 24, 120, 216, 312, 408, 56, 152, 248, 344, 440, 88, 184, 280, 376, 472,
    4, 100, 196, 292, 388, 36, 132, 228, 324, 420, 68, 164, 260, 356, 452, 12, 108, 204, 300, 396,
    44, 140, 236, 332, 428, 76, 172, 268, 364, 460, 20, 116, 212, 308, 404, 52, 148, 244, 340, 436,
    84, 180, 276, 372, 468, 28, 124, 220, 316, 412, 60, 156, 252, 348, 444, 92, 188, 284, 380, 476,
    1, 97, 193, 289, 385, 33, 129, 225, 321, 417, 65, 161, 257, 353, 449, 9, 105, 201, 297, 393,
    41, 137, 233, 329, 425, 73, 169, 265, 361, 457, 17, 113, 209, 305, 401, 49, 145, 241, 337, 433,
    81, 177, 273, 369, 465, 25, 121, 217, 313, 409, 57, 153, 249, 345, 441, 89, 185, 281, 377, 473,
    5, 101, 197, 293, 389, 37, 133, 229, 325, 421, 69, 165, 261, 357, 453, 13, 109, 205, 301, 397,
    45, 141, 237, 333, 429, 77, 173, 269, 365, 461, 21, 117, 213, 309, 405, 53, 149, 245, 341, 437,
    85, 181, 277, 373, 469, 29, 125, 221, 317, 413, 61, 157, 253, 349, 445, 93, 189, 285, 381, 477,
    2, 98, 194, 290, 386, 34, 130, 226, 322, 418, 66, 162, 258, 354, 450, 10, 106, 202, 298, 394,
    42, 138, 234, 330, 426, 74, 170, 266, 362, 458, 18, 114, 210, 306, 402, 50, 146, 242, 338, 434,
    82, 178, 274, 370, 466, 26, 122, 218, 314, 410, 58, 154, 250, 346, 442, 90, 186, 282, 378, 474,
    6, 102, 198, 294, 390, 38, 134, 230, 326, 422, 70, 166, 262, 358, 454, 14, 110, 206, 302, 398,
    46, 142, 238, 334, 430, 78, 174, 270, 366, 462, 22, 118, 214, 310, 406, 54, 150, 246, 342, 438,
    86, 182, 278, 374, 470, 30, 126, 222, 318, 414, 62, 158, 254, 350, 446, 94, 190, 286, 382, 478,
    3, 99, 195, 291, 387, 35, 131, 227, 323, 419, 67, 163, 259, 355, 451, 11, 107, 203, 299, 395,
    43, 139, 235, 331, 427, 75, 171, 267, 363, 459, 19, 115, 211, 307, 403, 51, 147, 243, 339, 435,
    83, 179, 275, 371, 467, 27, 123, 219, 315, 411, 59, 155, 251, 347, 443, 91, 187, 283, 379, 475,
    7, 103, 199, 295, 391, 39, 135, 231, 327, 423, 71, 167, 263, 359, 455, 15, 111, 207, 303, 399,
    47, 143, 239, 335, 431, 79, 175, 271, 367, 463, 23, 119, 215, 311, 407, 55, 151, 247, 343, 439,
    87, 183, 279, 375, 471, 31, 127, 223, 319, 415, 63, 159, 255, 351, 447, 95, 191, 287, 383, 479,
];

const FFT_BITREV_240_USIZE: [usize; 240] = [
    0, 48, 96, 144, 192, 16, 64, 112, 160, 208, 32, 80, 128, 176, 224, 4, 52, 100, 148, 196, 20,
    68, 116, 164, 212, 36, 84, 132, 180, 228, 8, 56, 104, 152, 200, 24, 72, 120, 168, 216, 40, 88,
    136, 184, 232, 12, 60, 108, 156, 204, 28, 76, 124, 172, 220, 44, 92, 140, 188, 236, 1, 49, 97,
    145, 193, 17, 65, 113, 161, 209, 33, 81, 129, 177, 225, 5, 53, 101, 149, 197, 21, 69, 117, 165,
    213, 37, 85, 133, 181, 229, 9, 57, 105, 153, 201, 25, 73, 121, 169, 217, 41, 89, 137, 185, 233,
    13, 61, 109, 157, 205, 29, 77, 125, 173, 221, 45, 93, 141, 189, 237, 2, 50, 98, 146, 194, 18,
    66, 114, 162, 210, 34, 82, 130, 178, 226, 6, 54, 102, 150, 198, 22, 70, 118, 166, 214, 38, 86,
    134, 182, 230, 10, 58, 106, 154, 202, 26, 74, 122, 170, 218, 42, 90, 138, 186, 234, 14, 62,
    110, 158, 206, 30, 78, 126, 174, 222, 46, 94, 142, 190, 238, 3, 51, 99, 147, 195, 19, 67, 115,
    163, 211, 35, 83, 131, 179, 227, 7, 55, 103, 151, 199, 23, 71, 119, 167, 215, 39, 87, 135, 183,
    231, 11, 59, 107, 155, 203, 27, 75, 123, 171, 219, 43, 91, 139, 187, 235, 15, 63, 111, 159,
    207, 31, 79, 127, 175, 223, 47, 95, 143, 191, 239,
];

const FFT_BITREV_120_USIZE: [usize; 120] = [
    0, 24, 48, 72, 96, 8, 32, 56, 80, 104, 16, 40, 64, 88, 112, 4, 28, 52, 76, 100, 12, 36, 60, 84,
    108, 20, 44, 68, 92, 116, 1, 25, 49, 73, 97, 9, 33, 57, 81, 105, 17, 41, 65, 89, 113, 5, 29,
    53, 77, 101, 13, 37, 61, 85, 109, 21, 45, 69, 93, 117, 2, 26, 50, 74, 98, 10, 34, 58, 82, 106,
    18, 42, 66, 90, 114, 6, 30, 54, 78, 102, 14, 38, 62, 86, 110, 22, 46, 70, 94, 118, 3, 27, 51,
    75, 99, 11, 35, 59, 83, 107, 19, 43, 67, 91, 115, 7, 31, 55, 79, 103, 15, 39, 63, 87, 111, 23,
    47, 71, 95, 119,
];

const FFT_BITREV_60_USIZE: [usize; 60] = [
    0, 12, 24, 36, 48, 4, 16, 28, 40, 52, 8, 20, 32, 44, 56, 1, 13, 25, 37, 49, 5, 17, 29, 41, 53,
    9, 21, 33, 45, 57, 2, 14, 26, 38, 50, 6, 18, 30, 42, 54, 10, 22, 34, 46, 58, 3, 15, 27, 39, 51,
    7, 19, 31, 43, 55, 11, 23, 35, 47, 59,
];

const MDCT_TWIDDLE_OFFSETS_960: [usize; 5] = [0, 960, 1440, 1680, 1800];

static FFT_STATES_48000_960: [KissFftState; 4] = [
    KissFftState::from_static(
        480,
        0.002_083_333,
        None,
        &FFT_FACTORS_480,
        &FFT_BITREV_480_USIZE,
        &FFT_TWIDDLES_48000_960,
    ),
    KissFftState::from_static(
        240,
        0.004_166_667,
        Some(1),
        &FFT_FACTORS_240,
        &FFT_BITREV_240_USIZE,
        &FFT_TWIDDLES_48000_960,
    ),
    KissFftState::from_static(
        120,
        0.008_333_333,
        Some(2),
        &FFT_FACTORS_120,
        &FFT_BITREV_120_USIZE,
        &FFT_TWIDDLES_48000_960,
    ),
    KissFftState::from_static(
        60,
        0.016_666_667,
        Some(3),
        &FFT_FACTORS_60,
        &FFT_BITREV_60_USIZE,
        &FFT_TWIDDLES_48000_960,
    ),
];

pub(crate) static STATIC_MDCT_48000_960: MdctLookup = MdctLookup::from_static(
    1_920,
    3,
    &FFT_STATES_48000_960,
    &FFT_STATES_48000_960,
    &MDCT_TWIDDLES_960,
    &MDCT_TWIDDLE_OFFSETS_960,
);