mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-09-21 00:26:12 +00:00
286 lines
13 KiB
C++
286 lines
13 KiB
C++
/*
|
|
* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __DSP_FIR_TAPS_H__
|
|
#define __DSP_FIR_TAPS_H__
|
|
|
|
#include <cstdint>
|
|
#include <array>
|
|
|
|
#include "complex.hpp"
|
|
|
|
/* 3kHz/6.7kHz @ 96kHz. sum(abs(taps)): 89429 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_031_070_tfilter { {
|
|
56, 58, 81, 100, 113, 112, 92, 49,
|
|
-21, -120, -244, -389, -543, -692, -819, -903,
|
|
-923, -861, -698, -424, -34, 469, 1073, 1756,
|
|
2492, 3243, 3972, 4639, 5204, 5634, 5903, 5995,
|
|
5903, 5634, 5204, 4639, 3972, 3243, 2492, 1756,
|
|
1073, 469, -34, -424, -698, -861, -923, -903,
|
|
-819, -692, -543, -389, -244, -120, -21, 49,
|
|
92, 112, 113, 100, 81, 58, 56, 0,
|
|
} };
|
|
|
|
/* 4kHz/7.5kHz @ 96kHz. sum(abs(taps)): 96783 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_042_078_tfilter { {
|
|
-19, 39, 72, 126, 197, 278, 360, 432,
|
|
478, 485, 438, 327, 152, -82, -359, -651,
|
|
-922, -1132, -1236, -1192, -968, -545, 81, 892,
|
|
1852, 2906, 3984, 5012, 5910, 6609, 7053, 7205,
|
|
7053, 6609, 5910, 5012, 3984, 2906, 1852, 892,
|
|
81, -545, -968, -1192, -1236, -1132, -922, -651,
|
|
-359, -82, 152, 327, 438, 485, 478, 432,
|
|
360, 278, 197, 126, 72, 39, -19, 0,
|
|
} };
|
|
|
|
/* 5kHz/8.5kHz @ 96kHz. sum(abs(taps)): 101312 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_052_089_tfilter { {
|
|
-65, -88, -129, -163, -178, -160, -100, 9,
|
|
160, 340, 523, 675, 758, 738, 591, 313,
|
|
-76, -533, -987, -1355, -1544, -1472, -1077, -335,
|
|
738, 2078, 3579, 5104, 6502, 7627, 8355, 8608,
|
|
8355, 7627, 6502, 5104, 3579, 2078, 738, -335,
|
|
-1077, -1472, -1544, -1355, -987, -533, -76, 313,
|
|
591, 738, 758, 675, 523, 340, 160, 9,
|
|
-100, -160, -178, -163, -129, -88, -65, 0,
|
|
} };
|
|
|
|
/* 6kHz/9.6kHz @ 96kHz. sum(abs(taps)): 105088 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_063_100_tfilter { {
|
|
43, 21, -2, -54, -138, -245, -360, -453,
|
|
-493, -451, -309, -73, 227, 535, 776, 876,
|
|
773, 443, -86, -730, -1357, -1801, -1898, -1515,
|
|
-585, 869, 2729, 4794, 6805, 8490, 9611, 10004,
|
|
9611, 8490, 6805, 4794, 2729, 869, -585, -1515,
|
|
-1898, -1801, -1357, -730, -86, 443, 773, 876,
|
|
776, 535, 227, -73, -309, -451, -493, -453,
|
|
-360, -245, -138, -54, -2, 21, 43, 0,
|
|
} };
|
|
|
|
/* 7kHz/10.4kHz @ 96kHz: sum(abs(taps)): 110157 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_073_108_tfilter { {
|
|
79, 145, 241, 334, 396, 394, 306, 130,
|
|
-109, -360, -550, -611, -494, -197, 229, 677,
|
|
1011, 1096, 846, 257, -570, -1436, -2078, -2225,
|
|
-1670, -327, 1726, 4245, 6861, 9146, 10704, 11257,
|
|
10704, 9146, 6861, 4245, 1726, -327, -1670, -2225,
|
|
-2078, -1436, -570, 257, 846, 1096, 1011, 677,
|
|
229, -197, -494, -611, -550, -360, -109, 130,
|
|
306, 394, 396, 334, 241, 145, 79, 0,
|
|
} };
|
|
|
|
/* 8kHz/11.5kHz @ 96kHz. sum(abs(taps)): 112092 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_083_120_tfilter { {
|
|
-63, -72, -71, -21, 89, 248, 417, 537,
|
|
548, 407, 124, -237, -563, -723, -621, -238,
|
|
337, 919, 1274, 1201, 617, -382, -1514, -2364,
|
|
-2499, -1600, 414, 3328, 6651, 9727, 11899, 12682,
|
|
11899, 9727, 6651, 3328, 414, -1600, -2499, -2364,
|
|
-1514, -382, 617, 1201, 1274, 919, 337, -238,
|
|
-621, -723, -563, -237, 124, 407, 548, 537,
|
|
417, 248, 89, -21, -71, -72, -63, 0,
|
|
} };
|
|
|
|
/* 9kHz/12.4kHz @ 96kHz. sum(abs(taps)): 116249 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_094_129_tfilter { {
|
|
5, -93, -198, -335, -449, -478, -378, -144,
|
|
166, 444, 563, 440, 82, -395, -788, -892,
|
|
-589, 73, 859, 1421, 1431, 734, -530, -1919,
|
|
-2798, -2555, -837, 2274, 6220, 10103, 12941, 13981,
|
|
12941, 10103, 6220, 2274, -837, -2555, -2798, -1919,
|
|
-530, 734, 1431, 1421, 859, 73, -589, -892,
|
|
-788, -395, 82, 440, 563, 444, 166, -144,
|
|
-378, -478, -449, -335, -198, -93, 5, 0,
|
|
} };
|
|
|
|
/* 10kHz/13.4kHz @ 96kHz. sum(abs(taps)): 118511 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_104_140_tfilter { {
|
|
89, 159, 220, 208, 84, -147, -412, -597,
|
|
-588, -345, 58, 441, 595, 391, -128, -730,
|
|
-1080, -914, -198, 793, 1558, 1594, 678, -942,
|
|
-2546, -3187, -2084, 992, 5515, 10321, 13985, 15353,
|
|
13985, 10321, 5515, 992, -2084, -3187, -2546, -942,
|
|
678, 1594, 1558, 793, -198, -914, -1080, -730,
|
|
-128, 391, 595, 441, 58, -345, -588, -597,
|
|
-412, -147, 84, 208, 220, 159, 89, 0,
|
|
} };
|
|
|
|
/* Wideband FM channel filter
|
|
* 103kHz/128kHz @ 768kHz
|
|
*/
|
|
constexpr std::array<int16_t, 64> taps_64_lp_130_169_tfilter { {
|
|
100, 127, 62, -157, -470, -707, -678, -332,
|
|
165, 494, 400, -85, -610, -729, -253, 535,
|
|
1026, 734, -263, -1264, -1398, -332, 1316, 2259,
|
|
1447, -988, -3474, -3769, -385, 6230, 13607, 18450,
|
|
18450, 13607, 6230, -385, -3769, -3474, -988, 1447,
|
|
2259, 1316, -332, -1398, -1264, -263, 734, 1026,
|
|
535, -253, -729, -610, -85, 400, 494, 165,
|
|
-332, -678, -707, -470, -157, 62, 127, 100,
|
|
} };
|
|
|
|
/* Wideband audio filter */
|
|
/* 96kHz int16_t input
|
|
* -> FIR filter, <15kHz (0.156fs) pass, >19kHz (0.198fs) stop
|
|
* -> 48kHz int16_t output, gain of 1.0 (I think).
|
|
* Padded to multiple of four taps for unrolled FIR code.
|
|
* sum(abs(taps)): 125270
|
|
*/
|
|
constexpr std::array<int16_t, 64> taps_64_lp_156_198 { {
|
|
-27, 166, 104, -36, -174, -129, 109, 287,
|
|
148, -232, -430, -130, 427, 597, 49, -716,
|
|
-778, 137, 1131, 957, -493, -1740, -1121, 1167,
|
|
2733, 1252, -2633, -4899, -1336, 8210, 18660, 23254,
|
|
18660, 8210, -1336, -4899, -2633, 1252, 2733, 1167,
|
|
-1121, -1740, -493, 957, 1131, 137, -778, -716,
|
|
49, 597, 427, -130, -430, -232, 148, 287,
|
|
109, -129, -174, -36, 104, 166, -27, 0,
|
|
} };
|
|
|
|
/* Narrowband FM filter */
|
|
/* 96kHz int16_t input
|
|
* -> FIR filter, <4kHz (0.042fs) pass, Hamming window.
|
|
* -> 48kHz int16_t output, gain of 1.0.
|
|
* Padded to multiple of four taps for unrolled FIR code.
|
|
* sum(abs(taps)): 81493
|
|
*/
|
|
constexpr std::array<int16_t, 64> taps_64_lp_042_hamming { {
|
|
51, 57, 61, 65, 63, 55, 35, 0,
|
|
-52, -122, -207, -304, -402, -491, -556, -582,
|
|
-552, -453, -271, 0, 363, 815, 1343, 1930,
|
|
2553, 3183, 3788, 4338, 4802, 5154, 5374, 5449,
|
|
5374, 5154, 4802, 4338, 3788, 3183, 2553, 1930,
|
|
1343, 815, 363, 0, -271, -453, -552, -582,
|
|
-556, -491, -402, -304, -207, -122, -52, 0,
|
|
35, 55, 63, 65, 61, 57, 51, 0
|
|
} };
|
|
|
|
/* Narrowband FM filter */
|
|
/* 96kHz int16_t input
|
|
* -> FIR filter, <6kHz (0.063fs) pass, Hamming window.
|
|
* -> 48kHz int16_t output, gain of 1.0.
|
|
* Padded to multiple of four taps for unrolled FIR code.
|
|
* sum(abs(taps)): 92477
|
|
*/
|
|
constexpr std::array<int16_t, 64> taps_64_lp_063_hamming { {
|
|
-20, -40, -59, -75, -83, -78, -52, 0,
|
|
77, 173, 272, 352, 386, 348, 221, 0,
|
|
-300, -644, -974, -1219, -1304, -1158, -730, 0,
|
|
1016, 2261, 3641, 5034, 6305, 7325, 7985, 8213,
|
|
7985, 7325, 6305, 5034, 3641, 2261, 1016, 0,
|
|
-730, -1158, -1304, -1219, -974, -644, -300, 0,
|
|
221, 348, 386, 352, 272, 173, 77, 0,
|
|
-52, -78, -83, -75, -59, -40, -20, 0
|
|
} };
|
|
|
|
/* sum(abs(taps)): 85241 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_063_blackman { {
|
|
0, 0, -2, -6, -11, -14, -11, 0,
|
|
24, 62, 110, 157, 188, 184, 125, 0,
|
|
-194, -441, -704, -926, -1035, -957, -626, 0,
|
|
925, 2109, 3466, 4872, 6182, 7249, 7946, 8189,
|
|
7946, 7249, 6182, 4872, 3466, 2109, 925, 0,
|
|
-626, -957, -1035, -926, -704, -441, -194, 0,
|
|
125, 184, 188, 157, 110, 62, 24, 0,
|
|
-11, -14, -11, -6, -2, 0, 0, 0
|
|
} };
|
|
|
|
/* Narrowband FM filter */
|
|
/* 96kHz int16_t input
|
|
* -> FIR filter, <8kHz (0.083fs) pass, Hamming window.
|
|
* -> 48kHz int16_t output, gain of 1.0.
|
|
* Padded to multiple of four taps for unrolled FIR code.
|
|
* sum(abs(taps)): 99180
|
|
*/
|
|
constexpr std::array<int16_t, 64> taps_64_lp_083_hamming { {
|
|
-26, 0, 32, 65, 90, 95, 67, 0,
|
|
-100, -211, -294, -304, -208, 0, 288, 582,
|
|
782, 785, 524, 0, -702, -1412, -1901, -1931,
|
|
-1322, 0, 1962, 4340, 6795, 8932, 10388, 10904,
|
|
10388, 8932, 6795, 4340, 1962, 0, -1322, -1931,
|
|
-1901, -1412, -702, 0, 524, 785, 782, 582,
|
|
288, 0, -208, -304, -294, -211, -100, 0,
|
|
67, 95, 90, 65, 32, 0, -26, 0
|
|
} };
|
|
|
|
/* sum(abs(taps)): 92568 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_083_blackman { {
|
|
0, 0, 1, 5, 12, 17, 15, 0,
|
|
-32, -77, -119, -136, -101, 0, 164, 355,
|
|
508, 541, 381, 0, -560, -1173, -1636, -1717,
|
|
-1209, 0, 1876, 4221, 6695, 8883, 10388, 10924,
|
|
10388, 8883, 6695, 4221, 1876, 0, -1209, -1717,
|
|
-1636, -1173, -560, 0, 381, 541, 508, 355,
|
|
164, 0, -101, -136, -119, -77, -32, 0,
|
|
15, 17, 12, 5, 1, 0, 0, 0
|
|
} };
|
|
|
|
/* Narrowband FM filter */
|
|
/* 96kHz int16_t input
|
|
* -> FIR filter, <10kHz (0.104fs) pass, Hamming window.
|
|
* -> 48kHz int16_t output, gain of 1.0.
|
|
* Padded to multiple of four taps for unrolled FIR code.
|
|
* sum(abs(taps)): 106396
|
|
*/
|
|
constexpr std::array<int16_t, 64> taps_64_lp_104_hamming { {
|
|
53, 40, 8, -37, -83, -106, -82, 0,
|
|
123, 236, 272, 175, -54, -347, -571, -583,
|
|
-299, 235, 833, 1215, 1116, 422, -728, -1934,
|
|
-2625, -2254, -512, 2509, 6285, 9975, 12663, 13646,
|
|
12663, 9975, 6285, 2509, -512, -2254, -2625, -1934,
|
|
-728, 422, 1116, 1215, 833, 235, -299, -583,
|
|
-571, -347, -54, 175, 272, 236, 123, 0,
|
|
-82, -106, -83, -37, 8, 40, 53, 0
|
|
} };
|
|
|
|
/* sum(abs(taps)): 99426 */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_104_blackman { {
|
|
0, 0, 0, -3, -11, -19, -18, 0,
|
|
39, 85, 110, 78, -26, -184, -325, -355,
|
|
-194, 161, 605, 926, 889, 350, -626, -1717,
|
|
-2397, -2109, -489, 2436, 6184, 9906, 12645, 13652,
|
|
12645, 9906, 6184, 2436, -489, -2109, -2397, -1717,
|
|
-626, 350, 889, 926, 605, 161, -194, -355,
|
|
-325, -184, -26, 78, 110, 85, 39, 0,
|
|
-18, -19, -11, -3, 0, 0, 0, 0
|
|
} };
|
|
|
|
/* Narrowband AM audio filter */
|
|
/* 96kHz int16_t input
|
|
* -> FIR filter, <3kHz (0.031fs) pass, >6kHz (0.063fs) stop
|
|
* -> 48kHz int16_t output, gain of 1.0 (I think).
|
|
* Padded to multiple of four taps for unrolled FIR code.
|
|
* sum(abs(taps)): 94053
|
|
*/
|
|
/* TODO: Review this filter, it's very quick and dirty. */
|
|
constexpr std::array<int16_t, 64> taps_64_lp_031_063 { {
|
|
-254, 255, 244, 269, 302, 325, 325, 290,
|
|
215, 99, -56, -241, -442, -643, -820, -950,
|
|
-1009, -974, -828, -558, -160, 361, 992, 1707,
|
|
2477, 3264, 4027, 4723, 5312, 5761, 6042, 6203,
|
|
6042, 5761, 5312, 4723, 4027, 3264, 2477, 1707,
|
|
992, 361, -160, -558, -828, -974, -1009, -950,
|
|
-820, -643, -442, -241, -56, 99, 215, 290,
|
|
325, 325, 302, 269, 244, 255, -254, 0,
|
|
} };
|
|
|
|
#endif/*__DSP_FIR_TAPS_H__*/
|