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Change the fsk filter used in CID and TDD decode to an integer based implementation

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@78227 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Doug Bailey
2007-08-06 19:52:40 +00:00
parent 8f17952065
commit 3e426df072
4 changed files with 213 additions and 190 deletions
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13
main/tdd.c
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@@ -103,20 +103,23 @@ struct tdd_state *tdd_new(void)
struct tdd_state *tdd;
tdd = calloc(1, sizeof(*tdd));
if (tdd) {
tdd->fskd.spb = 176; /* 45.5 baud */
tdd->fskd.ispb = 176; /* 45.5 baud */
/* Set up for 45.5 / 8000 freq *32 to allow ints */
tdd->fskd.pllispb = (int)((8000 * 32 * 2) / 90);
tdd->fskd.pllids = tdd->fskd.pllispb/32;
tdd->fskd.pllispb2 = tdd->fskd.pllispb/2;
tdd->fskd.hdlc = 0; /* Async */
tdd->fskd.nbit = 5; /* 5 bits */
tdd->fskd.nstop = 1.5; /* 1.5 stop bits */
tdd->fskd.instop = 1; /* integer rep of 1.5 stop bits */
tdd->fskd.parity = 0; /* No parity */
tdd->fskd.bw=0; /* Filter 75 Hz */
tdd->fskd.f_mark_idx = 0; /* 1400 Hz */
tdd->fskd.f_space_idx = 1; /* 1800 Hz */
tdd->fskd.pcola = 0; /* No clue */
tdd->fskd.cont = 0; /* Digital PLL reset */
tdd->fskd.x0 = 0.0;
tdd->fskd.xi0 = 0;
tdd->fskd.state = 0;
tdd->pos = 0;
tdd->mode = 2;
fskmodem_init(&tdd->fskd);
} else
ast_log(LOG_WARNING, "Out of memory\n");
return tdd;