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Clean up timestamps on IAX2

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2690 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Spencer
2004-04-14 18:15:16 +00:00
parent 5ebb0b8c15
commit 083d9c8039
1 changed files with 31 additions and 7 deletions
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38
channels/chan_iax2.c
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@@ -315,6 +315,8 @@ struct chan_iax2_pvt {
unsigned int last;
/* Last sent timestamp - never send the same timestamp twice in a single call */
unsigned int lastsent;
/* Next outgoing timestamp if everything is good */
unsigned int nextpred;
/* Ping time */
unsigned int pingtime;
/* Max time for initial response */
@@ -507,7 +509,7 @@ static int send_command_immediate(struct chan_iax2_pvt *, char, int, unsigned in
static int send_command_final(struct chan_iax2_pvt *, char, int, unsigned int, char *, int, int);
static int send_command_transfer(struct chan_iax2_pvt *, char, int, unsigned int, char *, int);
static unsigned int calc_timestamp(struct chan_iax2_pvt *p, unsigned int ts, struct timeval *tv);
static unsigned int calc_timestamp(struct chan_iax2_pvt *p, unsigned int ts, struct ast_frame *f);
static int send_ping(void *data)
{
@@ -2569,10 +2571,16 @@ static unsigned int fix_peerts(struct iax2_peer *peer, int callno, unsigned int
return ms + ts;
}
static unsigned int calc_timestamp(struct chan_iax2_pvt *p, unsigned int ts, struct timeval *delivery)
static unsigned int calc_timestamp(struct chan_iax2_pvt *p, unsigned int ts, struct ast_frame *f)
{
struct timeval tv;
int ms;
int voice = 0;
struct timeval *delivery = NULL;
if (f && (f->frametype == AST_FRAME_VOICE)) {
voice = 1;
delivery = &f->delivery;
}
if (!p->offset.tv_sec && !p->offset.tv_usec) {
gettimeofday(&p->offset, NULL);
/* Round to nearest 20ms */
@@ -2588,12 +2596,27 @@ static unsigned int calc_timestamp(struct chan_iax2_pvt *p, unsigned int ts, str
ms = (tv.tv_sec - p->offset.tv_sec) * 1000 + (tv.tv_usec - p->offset.tv_usec) / 1000;
if (ms < 0)
ms = 0;
}
/* We never send the same timestamp twice, so fudge a little if we must */
if (ms <= p->lastsent) {
ms = p->lastsent + 1;
if (voice) {
/* On a voice frame, use predicted values if appropriate */
if (abs(ms - p->nextpred) <= 640) {
if (!p->nextpred)
p->nextpred = f->samples / 8;
ms = p->nextpred;
} else
p->nextpred = ms;
} else {
/* On a dataframe, use last value + 3 (to accomodate jitter buffer shrinkign) if appropriate */
if (abs(ms - p->lastsent) <= 640) {
ms = p->lastsent + 3;
}
}
}
p->lastsent = ms;
if (voice)
p->nextpred = p->nextpred + f->samples / 8;
#if 0
printf("TS: %s - %dms\n", voice ? "Audio" : "Control", ms);
#endif
return ms;
}
@@ -2664,7 +2687,7 @@ static int iax2_send(struct chan_iax2_pvt *pvt, struct ast_frame *f, unsigned in
lastsent = pvt->lastsent;
/* Calculate actual timestamp */
fts = calc_timestamp(pvt, ts, (f->frametype == AST_FRAME_VOICE) ? &f->delivery : NULL);
fts = calc_timestamp(pvt, ts, f);
if ((pvt->trunk || ((fts & 0xFFFF0000L) == (lastsent & 0xFFFF0000L)))
/* High two bits are the same on timestamp, or sending on a trunk */ &&
@@ -3706,6 +3729,7 @@ static int complete_transfer(int callno, struct iax_ies *ies)
pvt->lag = 0;
pvt->last = 0;
pvt->lastsent = 0;
pvt->nextpred = 0;
pvt->pingtime = DEFAULT_RETRY_TIME;
ast_mutex_lock(&iaxq.lock);
for (cur = iaxq.head; cur ; cur = cur->next) {