2 * Copyright © 2010 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
19 #define AO_CONVERT_TEST
21 #include "ao_convert.c"
25 static inline i_abs(int i) { return i < 0 ? -i : i; }
30 int16_t p_to_a, p_to_a_to_p;
31 int16_t a_to_p, a_to_p_to_a;
32 int max_p_error = 0, max_p_error_p = -1;
33 int max_a_error = 0, max_a_error_a = -1;
38 for (i = 0; i < 32767 + STEP; i += STEP) {
41 p_to_a = ao_pres_to_altitude(i);
42 p_to_a_to_p = ao_altitude_to_pres(p_to_a);
43 p_error = i_abs(p_to_a_to_p - i);
44 if (p_error > max_p_error) {
45 max_p_error = p_error;
48 // printf ("pres %d alt %d pres %d\n",
49 // i, p_to_a, p_to_a_to_p);
51 for (i = -1578; i < 15835 + STEP; i += STEP) {
54 a_to_p = ao_altitude_to_pres(i);
55 a_to_p_to_a = ao_pres_to_altitude(a_to_p);
56 a_error = i_abs(a_to_p_to_a - i);
57 if (a_error > max_a_error) {
58 max_a_error = a_error;
61 // printf ("alt %d pres %d alt %d\n",
62 // i, a_to_p, a_to_p_to_a);
64 if (max_p_error > 2) {
65 printf ("max p error %d at %d\n", max_p_error,
69 if (max_a_error > 1) {
70 printf ("max a error %d at %d\n", max_a_error,