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Proposal: RtpListener for unsignalled ssrcs

From: Peter Thatcher <pthatcher@google.com>
Date: Thu, 13 Feb 2014 11:23:56 -0800
Message-ID: <CAJrXDUFEEaMbSA+hu3ahR1OhcsBqw+Sqgx=Kq3XtBF6afXV=9A@mail.gmail.com>
To: "public-orca@w3.org" <public-orca@w3.org>
With the move to RtpSender/RtpReceiver, we have one thing we're missing
from RTP that can't be put in either of them: an event for unsignalled
ssrcs.  We want such an event, but right now we don't have a clear place to
put it.  I propose we add a class called RtpListener which, like
RtpReceiver, wraps a DtlsTransport, and fires events for RTP received.
 Unlike RtpReceiver, which handles the RTP for a given set of ssrcs, the
RtpListener can listen to all RTP and fire an event if a packet is already
process by an existing RtpReceiver.  Here's how I propose RtpListener
 should look:

interface RTCRtpListener {
  readonly attribute RTCDtlsTransport transport;
  //  fires RTCRtpUnhandledRtpEvent;
  attribute EventHandler? onunhandledrtp;

interface RTCRtpUnhandledRtpEvent : Event {
  readonly attribute unsigned int  ssrc;
  readonly attribute unsigned byte payloadType;
  // AKA "AppID" header extension
  readonly attribute DOMString?    receiverId;

That's it :).  It's simple, but it grants a lot more flexibility to the
application to signal things (or not signal things) how it wants.
Received on Thursday, 13 February 2014 19:25:05 UTC

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