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Use echo training of FXS (fxo signalled) interfaces... rest to follow 

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@1677 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Spencer 2003-10-27 17:16:08 +00:00
parent 3d994d0b6c
commit 251e70953e
2 changed files with 31 additions and 0 deletions
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23
channels/chan_zap.c
View File

@ -172,6 +172,8 @@ static float txgain = 0.0;
static int echocancel;
static int echotraining;
static int echocanbridged = 0;
static int busydetect = 0;
@ -403,6 +405,7 @@ static struct zt_pvt {
int callwaitcas;
int callwaitrings;
int echocancel;
int echotraining;
int echocanbridged;
int echocanon;
int permcallwaiting;
@ -1064,6 +1067,22 @@ static void zt_enable_ec(struct zt_pvt *p)
ast_log(LOG_DEBUG, "No echocancellation requested\n");
}
static void zt_train_ec(struct zt_pvt *p)
{
int x;
int res;
if (p && p->echocancel && p->echotraining) {
x = 400;
res = ioctl(p->subs[SUB_REAL].zfd, ZT_ECHOTRAIN, &x);
if (res)
ast_log(LOG_WARNING, "Unable to request echo training on channel %d\n", p->channel);
else {
ast_log(LOG_DEBUG, "Engaged echo training on channel %d\n", p->channel);
}
} else
ast_log(LOG_DEBUG, "No echo training requested\n");
}
static void zt_disable_ec(struct zt_pvt *p)
{
int x;
@ -2814,6 +2833,7 @@ static struct ast_frame *zt_handle_event(struct ast_channel *ast)
switch(ast->_state) {
case AST_STATE_RINGING:
zt_enable_ec(p);
zt_train_ec(p);
p->subs[index].f.frametype = AST_FRAME_CONTROL;
p->subs[index].f.subclass = AST_CONTROL_ANSWER;
/* Make sure it stops ringing */
@ -5149,6 +5169,7 @@ static struct zt_pvt *mkintf(int channel, int signalling, int radio)
tmp->permhidecallerid = hidecallerid;
tmp->callreturn = callreturn;
tmp->echocancel = echocancel;
tmp->echotraining = echotraining;
tmp->echocanbridged = echocanbridged;
tmp->busydetect = busydetect;
tmp->busycount = busycount;
@ -6773,6 +6794,8 @@ int load_module()
if (echocancel)
echocancel=128;
}
} else if (!strcasecmp(v->name, "echotraining")) {
echotraining = ast_true(v->value);
} else if (!strcasecmp(v->name, "hidecallerid")) {
hidecallerid = ast_true(v->value);
} else if (!strcasecmp(v->name, "callreturn")) {

8
configs/zapata.conf.sample
View File

@ -145,6 +145,14 @@ echocancel=yes
;
echocancelwhenbridged=yes
;
; In some cases, the echo canceller doesn't train quickly enough and there
; is echo at the beginning of the call. Enabling echo training will cause
; asterisk to briefly mute the channel, send an impulse, and use the impulse
; response to pre-train the echo canceller so it can start out with a much
; closer idea of the actual echo.
;
;echotraining=yes
;
; If you are having trouble with DTMF detection, you can relax the
; DTMF detection parameters. Relaxing them may make the DTMF detector
; more likely to have "talkoff" where DTMF is detected when it