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cbbfd08423
to slightly improve binary size. Bug: None Change-Id: I894c7d67a72f4a8077963d2ba0a7bb471a2e7e4d Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/156300 Reviewed-by: Per Kjellander <perkj@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29428}
112 lines
3.8 KiB
C++
112 lines
3.8 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 "modules/rtp_rtcp/source/rtcp_packet/receiver_report.h"
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#include <utility>
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#include "modules/rtp_rtcp/source/byte_io.h"
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#include "modules/rtp_rtcp/source/rtcp_packet/common_header.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/logging.h"
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namespace webrtc {
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namespace rtcp {
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constexpr uint8_t ReceiverReport::kPacketType;
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constexpr size_t ReceiverReport::kMaxNumberOfReportBlocks;
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// RTCP receiver report (RFC 3550).
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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| RC | PT=RR=201 | length |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | SSRC of packet sender |
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// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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// | report block(s) |
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// | .... |
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ReceiverReport::ReceiverReport() = default;
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ReceiverReport::ReceiverReport(const ReceiverReport& rhs) = default;
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ReceiverReport::~ReceiverReport() = default;
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bool ReceiverReport::Parse(const CommonHeader& packet) {
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RTC_DCHECK_EQ(packet.type(), kPacketType);
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const uint8_t report_blocks_count = packet.count();
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if (packet.payload_size_bytes() <
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kRrBaseLength + report_blocks_count * ReportBlock::kLength) {
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RTC_LOG(LS_WARNING) << "Packet is too small to contain all the data.";
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return false;
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}
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SetSenderSsrc(ByteReader<uint32_t>::ReadBigEndian(packet.payload()));
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const uint8_t* next_report_block = packet.payload() + kRrBaseLength;
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report_blocks_.resize(report_blocks_count);
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for (ReportBlock& block : report_blocks_) {
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block.Parse(next_report_block, ReportBlock::kLength);
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next_report_block += ReportBlock::kLength;
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}
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RTC_DCHECK_LE(next_report_block - packet.payload(),
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static_cast<ptrdiff_t>(packet.payload_size_bytes()));
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return true;
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}
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size_t ReceiverReport::BlockLength() const {
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return kHeaderLength + kRrBaseLength +
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report_blocks_.size() * ReportBlock::kLength;
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}
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bool ReceiverReport::Create(uint8_t* packet,
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size_t* index,
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size_t max_length,
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PacketReadyCallback callback) const {
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while (*index + BlockLength() > max_length) {
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if (!OnBufferFull(packet, index, callback))
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return false;
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}
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CreateHeader(report_blocks_.size(), kPacketType, HeaderLength(), packet,
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index);
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ByteWriter<uint32_t>::WriteBigEndian(packet + *index, sender_ssrc());
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*index += kRrBaseLength;
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for (const ReportBlock& block : report_blocks_) {
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block.Create(packet + *index);
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*index += ReportBlock::kLength;
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}
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return true;
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}
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bool ReceiverReport::AddReportBlock(const ReportBlock& block) {
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if (report_blocks_.size() >= kMaxNumberOfReportBlocks) {
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RTC_LOG(LS_WARNING) << "Max report blocks reached.";
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return false;
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}
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report_blocks_.push_back(block);
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return true;
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}
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bool ReceiverReport::SetReportBlocks(std::vector<ReportBlock> blocks) {
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if (blocks.size() > kMaxNumberOfReportBlocks) {
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RTC_LOG(LS_WARNING) << "Too many report blocks (" << blocks.size()
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<< ") for receiver report.";
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return false;
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}
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report_blocks_ = std::move(blocks);
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return true;
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}
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} // namespace rtcp
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} // namespace webrtc
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