diff options
Diffstat (limited to 'webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc')
-rw-r--r-- | webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc b/webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc new file mode 100644 index 0000000000..ef64b4f51b --- /dev/null +++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.cc @@ -0,0 +1,89 @@ +/* + * 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 "webrtc/modules/rtp_rtcp/source/rtcp_packet/receiver_report.h" + +#include "webrtc/base/checks.h" +#include "webrtc/base/logging.h" +#include "webrtc/modules/rtp_rtcp/source/byte_io.h" + +using webrtc::RTCPUtility::RtcpCommonHeader; + +namespace webrtc { +namespace rtcp { + +// +// 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) | +// | .... | +bool ReceiverReport::Parse(const RTCPUtility::RtcpCommonHeader& header, + const uint8_t* payload) { + RTC_DCHECK(header.packet_type == kPacketType); + + const uint8_t report_blocks_count = header.count_or_format; + + if (header.payload_size_bytes < + kRrBaseLength + report_blocks_count * ReportBlock::kLength) { + LOG(LS_WARNING) << "Packet is too small to contain all the data."; + return false; + } + + sender_ssrc_ = ByteReader<uint32_t>::ReadBigEndian(payload); + + const uint8_t* next_report_block = 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, payload + header.payload_size_bytes); + return true; +} + +bool ReceiverReport::Create(uint8_t* packet, + size_t* index, + size_t max_length, + RtcpPacket::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::WithReportBlock(const ReportBlock& block) { + if (report_blocks_.size() >= kMaxNumberOfReportBlocks) { + LOG(LS_WARNING) << "Max report blocks reached."; + return false; + } + report_blocks_.push_back(block); + return true; +} + +} // namespace rtcp +} // namespace webrtc |