W3C home > Mailing lists > Public > public-webrtc@w3.org > May 2014

[Bug 25497] RTCRtpSender / Receiver objects need to be added to the specification

From: <bugzilla@jessica.w3.org>
Date: Thu, 08 May 2014 06:06:33 +0000
To: public-webrtc@w3.org
Message-ID: <bug-25497-4991-F32M1cciFS@http.www.w3.org/Bugs/Public/>
https://www.w3.org/Bugs/Public/show_bug.cgi?id=25497

--- Comment #1 from Harald Alvestrand <harald@alvestrand.no> ---
Summary from Justin Uberti, May 8:

Trying to bring this discussion to a conclusion... I sense consensus around the
following:
- General concept of doohickeys, i.e. RTCRtpSender, RTPRtpReceiver.
- addTrack(track, streamId)/removeTrack and onaddtrack.
- Implicit cloning never occurs. This means that if you want to add a track
twice to a PC, you need to first clone it.

More discussion is still needed on:
- RTCRtpEncodingParams
- RTCDtlsTransport

Therefore I would like to advance the initial, uncontroversial parts of this
proposal, i.e. what I describe below. We can then discuss the exact nature of
the encodings and transport objects separately on the list, and at the interim
meeting.

// the "send" doohickey

interface RTCRtpSender {

 readonly attribute MediaStreamTrack track;

};

// the "receive" doohickey

interface RTCRtpReceiver {

 readonly attribute MediaStreamTrack track;

};

// parameter to the onaddtrack event

interface AddTrackEvent : Event {

 readonly attribute RtpReceiver receiver;

 readonly attribute MediaStreamTrack track;

 readonly attribute MediaStream stream;

};

partial interface RTCPeerConnection {

// because a track can be part of multiple streams, the id parameter

 // indicates which particular stream should be referenced in signaling

 RTCRtpSender addTrack(track, streamId);  // replaces addStream; fails if
|track| has already been added                               

 void removeTrack(RTCRtpSender);  // replaces removeStream

 sequence<RTCRtpSender> getSenders();

 sequence<RTCRtpReceiver> getReceivers();

 EventHandler onaddtrack;  // replaces onaddstream; event object is
RemoteTrackEvent.

                                        // note that onremovestream is not
needed, since tracks are 'removed'

                                        // simply by progressing to the ENDED
state

};

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Received on Thursday, 8 May 2014 06:06:34 UTC

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