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Re: Where to attach a DTMF API

From: Stefan Håkansson LK <stefan.lk.hakansson@ericsson.com>
Date: Tue, 29 Nov 2011 13:04:15 +0100
Message-ID: <4ED4CA3F.3030209@ericsson.com>
To: public-webrtc@w3.org
On 11/29/2011 11:23 AM, Timothy B. Terriberry wrote:
>>> How should we handle these cases? Can we create a null audio track using
>>> the current API?
>> How would you do it for a legacy client? My understanding was that
>> RFC4733 required and existing (audio) RTP stream (identified by SSRC) to
>> insert its DTMF payloads into.
> I think the question is simply whether or not we can create such an RTP
> stream without acquiring a MediaStream via getUserMedia(). roc's
> MediaStream Processing API certainly provides a way to do this. Chris
> Rogers' Web Audio API doesn't seem to provide MediaStream objects that I
> can tell, but I assume that's something that could be fixed.
An alterantive (thinking out loud) could be that "sendDTMF", if there is 
no audio RTP flow set up, actually sets up a dummy RTP flow used solely 
for DTMF (according to RFC4733).
Received on Tuesday, 29 November 2011 12:04:50 UTC

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