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RtpTransceiverInterface: introduce HeaderExtensionsNegotiated.

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This changes adds exposure of a new transceiver method for
accessing header extensions that have been negotiated, following
spec details in https://w3c.github.io/webrtc-extensions/#rtcrtptransceiver-interface.

The change contains unit tests testing the functionality.

Note: support for signalling directionality of header extensions
in the SDP isn't implemented yet.

https://chromestatus.com/feature/5680189201711104.
Intent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/65YdUi02yZk

Bug: chromium:1051821
Change-Id: If963beed37e96eed2dff3a2822db4e30caaea4a0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/198126
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Markus Handell <handellm@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32860}
This commit is contained in:
Markus Handell
2020-12-17 22:19:40 +01:00
committed by Commit Bot
parent d95a47d08f
commit 5932fe1392
10 changed files with 164 additions and 4 deletions
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6
api/rtp_transceiver_interface.h
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@ -156,6 +156,12 @@ class RTC_EXPORT RtpTransceiverInterface : public rtc::RefCountInterface {
virtual std::vector<RtpHeaderExtensionCapability> HeaderExtensionsToOffer()
const;
// Readonly attribute which is either empty if negotation has not yet
// happened, or a vector of the negotiated header extensions.
// https://w3c.github.io/webrtc-extensions/#rtcrtptransceiver-interface
virtual std::vector<RtpHeaderExtensionCapability> HeaderExtensionsNegotiated()
const;
// The SetOfferedRtpHeaderExtensions method modifies the next SDP negotiation
// so that it negotiates use of header extensions which are not kStopped.
// https://w3c.github.io/webrtc-extensions/#rtcrtptransceiver-interface