From e096011929341766ffd7389747ba82ba6eb8a469 Mon Sep 17 00:00:00 2001 From: mnicholson Date: Fri, 16 Jul 2010 17:29:57 +0000 Subject: For pass through DTMF tones, measure the actual duration between the begin and end packets on the wire. If it is detected to be less than AST_MIN_DTMF_DURATION, trigger dtmf emulation. AST-362 git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@277247 f38db490-d61c-443f-a65b-d21fe96a405b --- main/channel.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/main/channel.c b/main/channel.c index af501c146..5134cefc1 100644 --- a/main/channel.c +++ b/main/channel.c @@ -2406,6 +2406,19 @@ static struct ast_frame *__ast_read(struct ast_channel *chan, int dropaudio) ast_clear_flag(chan, AST_FLAG_IN_DTMF); if (!f->len) f->len = ast_tvdiff_ms(now, chan->dtmf_tv); + + /* detect tones that were received on + * the wire with durations shorter than + * AST_MIN_DTMF_DURATION and set f->len + * to the actual duration of the DTMF + * frames on the wire. This will cause + * dtmf emulation to be triggered later + * on. + */ + if (ast_tvdiff_ms(now, chan->dtmf_tv) < AST_MIN_DTMF_DURATION) { + f->len = ast_tvdiff_ms(now, chan->dtmf_tv); + ast_log(LOG_DTMF, "DTMF end '%c' detected to have actual duration %ld on the wire, emulation will be triggered on %s\n", f->subclass, f->len, chan->name); + } } else if (!f->len) { ast_log(LOG_DTMF, "DTMF end accepted without begin '%c' on %s\n", f->subclass, chan->name); f->len = AST_MIN_DTMF_DURATION; -- cgit v1.2.3