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fixes crash during dtmf

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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/trunk@264114 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
David Vossel
2010-05-19 14:38:02 +00:00
parent 30e9a9794c
commit 51e7ee235b
1 changed files with 3 additions and 2 deletions
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5
res/res_rtp_asterisk.c
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@@ -1502,10 +1502,11 @@ static struct ast_frame *process_dtmf_cisco(struct ast_rtp_instance *instance, u
}
} else if ((rtp->resp == resp) && !power) {
f = create_dtmf_frame(instance, AST_FRAME_DTMF_END, ast_rtp_instance_get_prop(instance, AST_RTP_PROPERTY_DTMF_COMPENSATE));
f->samples = rtp->dtmfsamples * (rtp_get_rate(f->subclass.codec) / 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.codec) / 1000);
rtp->dtmfsamples += 20 * (rtp->lastrxformat ? (rtp_get_rate(rtp->lastrxformat) / 1000) : 8);
rtp->dtmf_timeout = 0;
return f;