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
37 static 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
60 static 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
76 static void
arrayprint(const char * name,const double * arr,size_t len)77 arrayprint(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
92 static void
cosprint(int lim,int sgn)93 cosprint(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
122 int
main(void)123 main(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