1/* $NetBSD: cosdata.c,v 1.3 2017/01/30 15:50:21 christos Exp $ */ 2 3/*- 4 * Copyright (c) 2015 - 2016 Nathanial Sloss <nathanialsloss@yahoo.com.au> 5 * All rights reserved. 6 * 7 * This software is dedicated to the memory of - 8 * Baron James Anlezark (Barry) - 1 Jan 1949 - 13 May 2012. 9 * 10 * Barry was a man who loved his music. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#include <math.h> 35#include <stdio.h> 36 37static const double sbc_coeffs8[] = { 38 0.00000000e+00, 1.56575398e-04, 3.43256425e-04, 5.54620202e-04, 39 8.23919506e-04, 1.13992507e-03, 1.47640169e-03, 1.78371725e-03, 40 2.01182542e-03, 2.10371989e-03, 1.99454554e-03, 1.61656283e-03, 41 9.02154502e-04, -1.78805361e-04, -1.64973098e-03, -3.49717454e-03, 42 5.65949473e-03, 8.02941163e-03, 1.04584443e-02, 1.27472335e-02, 43 1.46525263e-02, 1.59045603e-02, 1.62208471e-02, 1.53184106e-02, 44 1.29371806e-02, 8.85757540e-03, 2.92408442e-03, -4.91578024e-03, 45 -1.46404076e-02, -2.61098752e-02, -3.90751381e-02, -5.31873032e-02, 46 6.79989431e-02, 8.29847578e-02, 9.75753918e-02, 1.11196689e-01, 47 1.23264548e-01, 1.33264415e-01, 1.40753505e-01, 1.45389847e-01, 48 1.46955068e-01, 1.45389847e-01, 1.40753505e-01, 1.33264415e-01, 49 1.23264548e-01, 1.11196689e-01, 9.75753918e-02, 8.29847578e-02, 50 -6.79989431e-02, -5.31873032e-02, -3.90751381e-02, -2.61098752e-02, 51 -1.46404076e-02, -4.91578024e-03, 2.92408442e-03, 8.85757540e-03, 52 1.29371806e-02, 1.53184106e-02, 1.62208471e-02, 1.59045603e-02, 53 1.46525263e-02, 1.27472335e-02, 1.04584443e-02, 8.02941163e-03, 54 -5.65949473e-03, -3.49717454e-03, -1.64973098e-03, -1.78805361e-04, 55 9.02154502e-04, 1.61656283e-03, 1.99454554e-03, 2.10371989e-03, 56 2.01182542e-03, 1.78371725e-03, 1.47640169e-03, 1.13992507e-03, 57 8.23919506e-04, 5.54620202e-04, 3.43256425e-04, 1.56575398e-04, 58}; 59 60static const double sbc_coeffs4[] = { 61 0.00000000e+00, 5.36548976e-04, 1.49188357e-03, 2.73370904e-03, 62 3.83720193e-03, 3.89205149e-03, 1.86581691e-03,-3.06012286e-03, 63 1.09137620e-02, 2.04385087e-02, 2.88757392e-02, 3.21939290e-02, 64 2.58767811e-02, 6.13245186e-03,-2.88217274e-02,-7.76463494e-02, 65 1.35593274e-01, 1.94987841e-01, 2.46636662e-01, 2.81828203e-01, 66 2.94315332e-01, 2.81828203e-01, 2.46636662e-01, 1.94987841e-01, 67 -1.35593274e-01,-7.76463494e-02,-2.88217274e-02, 6.13245186e-03, 68 2.58767811e-02, 3.21939290e-02, 2.88757392e-02, 2.04385087e-02, 69 -1.09137620e-02,-3.06012286e-03, 1.86581691e-03, 3.89205149e-03, 70 3.83720193e-03, 2.73370904e-03, 1.49188357e-03, 5.36548976e-04, 71}; 72 73#define COEFFS_MULTI (1 << 12) 74#define SI_MULTI 512 75 76static void 77arrayprint(const char *name, const double *arr, size_t len) 78{ 79 size_t k, count; 80 81 printf("static const int32_t %s[] = {\n\t", name); 82 for (count = k = 0; k < len; k++, count++) { 83 if (count % 8 == 0 && count != 0) 84 printf("\n\t"); 85 printf("%d, ", (int)roundf((float)arr[k] * COEFFS_MULTI)); 86 } 87 printf("\n};\n"); 88} 89 90#define ARRAYPRINT(a) arrayprint(#a, a, sizeof(a) / sizeof(a[0])) 91 92static void 93cosprint(int lim, int sgn) 94{ 95 size_t count, i, k; 96 size_t mi = lim * 4; 97 size_t mk = mi * 2; 98 int dk = sgn * lim * 2; 99 double mp = M_PI_4 / lim; 100 float val; 101 102 printf("static const int32_t cos%sdata%zu[%zu][%zu] = {\n\t", 103 sgn == -1 ? "" : "dec", mi, mi, mk); 104 105 for (count = 0, i = 0; i < mi; i++) { 106 for (k = 0; k < mk; k++, count++) { 107 if (count % 8 == 0 && count != 0) 108 printf("\n\t"); 109 if (k == 0) 110 printf("{ "); 111 112 val = cosf((i + 0.5) * ((int)k + dk) * mp); 113 printf("%d, ", (int)roundf(val * SI_MULTI)); 114 115 if (k == mk - 1) 116 printf("},"); 117 } 118 } 119 printf("\n};\n"); 120} 121 122int 123main(void) 124{ 125 printf("/* sbc_coeffs.h - Automatically generated by cosdata.c. */\n" 126 "\n"); 127 128 printf("#define\tSIMULTI\t%d\n\n", SI_MULTI); 129 printf("#define\tCOEFFSMULTI\t%d\n\n", COEFFS_MULTI); 130 131 ARRAYPRINT(sbc_coeffs8); 132 ARRAYPRINT(sbc_coeffs4); 133 134 cosprint(2, -1); 135 cosprint(1, -1); 136 cosprint(2, 1); 137 cosprint(1, 1); 138 139 return 0; 140} 141