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74f0a51f97
The FMT 15 is not specific only to REMB or loss notification messages. Rather, it is the Application Layer FB (AFB) of Psfb (Payload Specific Feedback Messages). See https://tools.ietf.org/html/rfc4585#section-6.3 TBR=terelius@webrtc.org Bug: webrtc:10336 Change-Id: I8cd27ef9ee044bf7b7e7c1bd1a53c1dae2d95006 Reviewed-on: https://webrtc-review.googlesource.com/c/123886 Commit-Queue: Elad Alon <eladalon@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26827}
47 lines
1.9 KiB
C++
47 lines
1.9 KiB
C++
/*
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* Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/rtp_rtcp/source/rtcp_packet/psfb.h"
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#include "modules/rtp_rtcp/source/byte_io.h"
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namespace webrtc {
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namespace rtcp {
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constexpr uint8_t Psfb::kPacketType;
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constexpr uint8_t Psfb::kAfbMessageType;
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constexpr size_t Psfb::kCommonFeedbackLength;
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// RFC 4585: Feedback format.
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//
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// Common packet format:
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//
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// 0 1 2 3
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// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// |V=2|P| FMT | PT | length |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// 0 | SSRC of packet sender |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// 4 | SSRC of media source |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// : Feedback Control Information (FCI) :
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// : :
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void Psfb::ParseCommonFeedback(const uint8_t* payload) {
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sender_ssrc_ = ByteReader<uint32_t>::ReadBigEndian(&payload[0]);
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media_ssrc_ = ByteReader<uint32_t>::ReadBigEndian(&payload[4]);
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}
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void Psfb::CreateCommonFeedback(uint8_t* payload) const {
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ByteWriter<uint32_t>::WriteBigEndian(&payload[0], sender_ssrc_);
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ByteWriter<uint32_t>::WriteBigEndian(&payload[4], media_ssrc_);
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}
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} // namespace rtcp
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} // namespace webrtc
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