a8890a57a5
Review URL: https://codereview.webrtc.org/1461623003 Cr-Commit-Position: refs/heads/master@{#11111}
46 lines
1.8 KiB
C++
46 lines
1.8 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 "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h"
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#include "webrtc/modules/rtp_rtcp/source/byte_io.h"
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namespace webrtc {
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namespace rtcp {
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// RFC 4585, Section 6.1: 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 Rtpfb::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 Rtpfb::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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