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Implementation of NMT (Nordic Mobile Telephoe) network

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This commit is contained in:
Andreas Eversberg
2016-02-21 18:13:30 +01:00
parent cbfc818cce
commit 57caa536cf
19 changed files with 10866 additions and 3 deletions
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43
src/nmt/tones.c Normal file
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#include <stdint.h>
static int16_t pattern[] = {
0, 5320, 10063, 13716, 15883, 16328, 15004, 12054, 7798, 2697, -2697, -7798, -12054, -15004, -16328, -15883, -13716, -10063, -5320,
//0, 2660, 5032, 6858, 7941, 8164, 7502, 6027, 3899, 1348, -1348, -3899, -6027, -7502, -8164, -7941, -6858, -5032, -2660,
};
static int16_t tone[7999];
extern int16_t *ringback_spl;
extern int ringback_size;
extern int ringback_max;
extern int16_t *busy_spl;
extern int busy_size;
extern int busy_max;
extern int16_t *congestion_spl;
extern int congestion_size;
extern int congestion_max;
void init_nmt_tones(void)
{
int i, j;
for (i = 0, j = 0; i < 7999; i++) {
tone[i] = pattern[j++];
if (j == 19)
j = 0;
}
ringback_spl = tone;
ringback_size = 7999;
ringback_max = 8 * 5000; /* 1000 / 4000 */
busy_spl = tone;
busy_size = 1995;
busy_max = 8 * 500; /* 250 / 250 */
congestion_spl = tone;
congestion_size = 1995;
congestion_max = 8 * 500; /* 250 / 250 */
}