diff options
Diffstat (limited to 'third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc')
-rw-r--r-- | third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc b/third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc new file mode 100644 index 0000000000..185011dff1 --- /dev/null +++ b/third_party/libwebrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc @@ -0,0 +1,112 @@ +/* + * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "modules/rtp_rtcp/source/rtcp_packet/receiver_report.h" + +#include <utility> + +#include "modules/rtp_rtcp/source/byte_io.h" +#include "modules/rtp_rtcp/source/rtcp_packet/common_header.h" +#include "rtc_base/checks.h" +#include "rtc_base/logging.h" + +namespace webrtc { +namespace rtcp { +constexpr uint8_t ReceiverReport::kPacketType; +constexpr size_t ReceiverReport::kMaxNumberOfReportBlocks; +// RTCP receiver report (RFC 3550). +// +// 0 1 2 3 +// 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 +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// |V=2|P| RC | PT=RR=201 | length | +// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +// | SSRC of packet sender | +// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ +// | report block(s) | +// | .... | + +ReceiverReport::ReceiverReport() = default; + +ReceiverReport::ReceiverReport(const ReceiverReport& rhs) = default; + +ReceiverReport::~ReceiverReport() = default; + +bool ReceiverReport::Parse(const CommonHeader& packet) { + RTC_DCHECK_EQ(packet.type(), kPacketType); + + const uint8_t report_blocks_count = packet.count(); + + if (packet.payload_size_bytes() < + kRrBaseLength + report_blocks_count * ReportBlock::kLength) { + RTC_LOG(LS_WARNING) << "Packet is too small to contain all the data."; + return false; + } + + SetSenderSsrc(ByteReader<uint32_t>::ReadBigEndian(packet.payload())); + + const uint8_t* next_report_block = packet.payload() + kRrBaseLength; + + report_blocks_.resize(report_blocks_count); + for (ReportBlock& block : report_blocks_) { + block.Parse(next_report_block, ReportBlock::kLength); + next_report_block += ReportBlock::kLength; + } + + RTC_DCHECK_LE(next_report_block - packet.payload(), + static_cast<ptrdiff_t>(packet.payload_size_bytes())); + return true; +} + +size_t ReceiverReport::BlockLength() const { + return kHeaderLength + kRrBaseLength + + report_blocks_.size() * ReportBlock::kLength; +} + +bool ReceiverReport::Create(uint8_t* packet, + size_t* index, + size_t max_length, + PacketReadyCallback callback) const { + while (*index + BlockLength() > max_length) { + if (!OnBufferFull(packet, index, callback)) + return false; + } + CreateHeader(report_blocks_.size(), kPacketType, HeaderLength(), packet, + index); + ByteWriter<uint32_t>::WriteBigEndian(packet + *index, sender_ssrc()); + *index += kRrBaseLength; + for (const ReportBlock& block : report_blocks_) { + block.Create(packet + *index); + *index += ReportBlock::kLength; + } + return true; +} + +bool ReceiverReport::AddReportBlock(const ReportBlock& block) { + if (report_blocks_.size() >= kMaxNumberOfReportBlocks) { + RTC_LOG(LS_WARNING) << "Max report blocks reached."; + return false; + } + report_blocks_.push_back(block); + return true; +} + +bool ReceiverReport::SetReportBlocks(std::vector<ReportBlock> blocks) { + if (blocks.size() > kMaxNumberOfReportBlocks) { + RTC_LOG(LS_WARNING) << "Too many report blocks (" << blocks.size() + << ") for receiver report."; + return false; + } + report_blocks_ = std::move(blocks); + return true; +} + +} // namespace rtcp +} // namespace webrtc |