File: rtc_rtp_acks.idl

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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.


enum ExplicitCongestionNotification {
  // ECT = ECN-Capable Transport
  "unset",  // AKA "Not-ECT";  Bits: 00
  "scalable-congestion-not-experienced",  // AKA "ECT(1)" or "Scalable" or "L4S" ; Bits: 01
  "classic-congestion-not-experienced", // AKA "ECT(0)" or "Classic" or "not L4S"; Bits: 10
  "congestion-experienced" // AKA "CE" or "ECN-marked" or "marked"; Bits: 11
};

// Collection of RTP packet remote feedback, delivered in a single RTCP message.
// TODO: crbug.com/345101934 - Improve name as the explainer evolves, https://github.com/w3c/webrtc-rtptransport/blob/main/explainer-use-case-2.md
[
    Exposed=(Window,Worker), RuntimeEnabled=RTCRtpTransport
] interface RTCRtpAcks {
  sequence<RTCRtpAck> acks();
  readonly attribute unsigned long long remoteSendTimestamp;
  readonly attribute DOMHighResTimeStamp receivedTime;
  readonly attribute ExplicitCongestionNotification explicitCongestionNotification;  // AKA "ECN"
};