From: David Vossel <dvossel@digium.com>
Date: Wed, 19 May 2010 14:47:14 +0000 (+0000)
Subject: Merged revisions 264114 via svnmerge from
X-Git-Tag: 1.6.2.9-rc1~2^2~35
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a1f66d06e0c63b4e2f1d111d846b7f9cfd84e269;p=thirdparty%2Fasterisk.git

Merged revisions 264114 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk

........
  r264114 | dvossel | 2010-05-19 09:38:02 -0500 (Wed, 19 May 2010) | 13 lines

  fixes crash during dtmf

  During the processing of Cisco dtmf the dtmf samples were
  not being calculated correctly.  In an attempt to determine
  what sample rate was being used, a NULL frame was processed
  which caused a crash.  This patch resolves this.

  (closes issue #17248)
  Reported by: falves11
  Patches:
        issue_17248.diff uploaded by dvossel (license 671)
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.2@264115 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/main/rtp.c b/main/rtp.c
index 8e1c6a7ff1..016d3b57e0 100644
--- a/main/rtp.c
+++ b/main/rtp.c
@@ -992,10 +992,10 @@ static struct ast_frame *process_cisco_dtmf(struct ast_rtp *rtp, unsigned char *
 		}
 	} else if ((rtp->resp == resp) && !power) {
 		f = create_dtmf_frame(rtp, AST_FRAME_DTMF_END);
-		f->samples = rtp->dtmfsamples * (rtp_get_rate(f->subclass) / 1000);
+		f->samples = rtp->dtmfsamples * (rtp->lastrxformat ? (rtp_get_rate(rtp->lastrxformat) / 1000) : 8);
 		rtp->resp = 0;
 	} else if (rtp->resp == resp)
-		rtp->dtmfsamples += 20 * (rtp_get_rate(f->subclass) / 1000);
+		rtp->dtmfsamples += 20 * (rtp->lastrxformat ? (rtp_get_rate(rtp->lastrxformat) / 1000) : 8);
 	rtp->dtmf_timeout = dtmftimeout;
 	return f;
 }