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78161ca59d
Bug: webrtc:8239 Change-Id: Icff1528e177e0bb39dd82bd4f8533e1ed2736c40 Reviewed-on: https://webrtc-review.googlesource.com/15540 Reviewed-by: Niels Moller <nisse@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20447}
102 lines
3.3 KiB
C++
102 lines
3.3 KiB
C++
/*
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* Copyright (c) 2017 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_transceiver_impl.h"
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#include <utility>
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#include <vector>
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#include "api/call/transport.h"
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#include "modules/rtp_rtcp/include/receive_statistics.h"
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#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "modules/rtp_rtcp/source/rtcp_packet.h"
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#include "modules/rtp_rtcp/source/rtcp_packet/receiver_report.h"
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#include "modules/rtp_rtcp/source/rtcp_packet/report_block.h"
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#include "modules/rtp_rtcp/source/rtcp_packet/sdes.h"
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#include "rtc_base/checks.h"
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namespace webrtc {
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namespace {
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// Helper to put several RTCP packets into lower layer datagram composing
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// Compound or Reduced-Size RTCP packet, as defined by RFC 5506 section 2.
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class PacketSender : public rtcp::RtcpPacket::PacketReadyCallback {
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public:
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PacketSender(Transport* transport, size_t max_packet_size)
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: transport_(transport), max_packet_size_(max_packet_size) {
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RTC_CHECK_LE(max_packet_size, IP_PACKET_SIZE);
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}
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~PacketSender() override {
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RTC_DCHECK_EQ(index_, 0) << "Unsent rtcp packet.";
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}
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// Appends a packet to pending compound packet.
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// Sends rtcp compound packet if buffer was already full and resets buffer.
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void AppendPacket(const rtcp::RtcpPacket& packet) {
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packet.Create(buffer_, &index_, max_packet_size_, this);
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}
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// Sends pending rtcp compound packet.
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void Send() {
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if (index_ > 0) {
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OnPacketReady(buffer_, index_);
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index_ = 0;
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}
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}
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private:
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// Implements RtcpPacket::PacketReadyCallback
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void OnPacketReady(uint8_t* data, size_t length) override {
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transport_->SendRtcp(data, length);
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}
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Transport* const transport_;
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const size_t max_packet_size_;
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size_t index_ = 0;
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uint8_t buffer_[IP_PACKET_SIZE];
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};
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} // namespace
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RtcpTransceiverImpl::RtcpTransceiverImpl(const RtcpTransceiverConfig& config)
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: config_(config) {
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RTC_CHECK(config_.Validate());
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}
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RtcpTransceiverImpl::~RtcpTransceiverImpl() = default;
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void RtcpTransceiverImpl::SendCompoundPacket() {
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PacketSender sender(config_.outgoing_transport, config_.max_packet_size);
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rtcp::ReceiverReport rr;
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rr.SetSenderSsrc(config_.feedback_ssrc);
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if (config_.receive_statistics) {
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// TODO(danilchap): Support sending more than
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// |ReceiverReport::kMaxNumberOfReportBlocks| per compound rtcp packet.
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std::vector<rtcp::ReportBlock> report_blocks =
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config_.receive_statistics->RtcpReportBlocks(
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rtcp::ReceiverReport::kMaxNumberOfReportBlocks);
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// TODO(danilchap): Fill in LastSr/DelayLastSr fields of report blocks
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// when RtcpTransceiver handles incoming sender reports.
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rr.SetReportBlocks(std::move(report_blocks));
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}
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sender.AppendPacket(rr);
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if (!config_.cname.empty()) {
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rtcp::Sdes sdes;
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bool added = sdes.AddCName(config_.feedback_ssrc, config_.cname);
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RTC_DCHECK(added) << "Failed to add cname " << config_.cname
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<< " to rtcp sdes packet.";
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sender.AppendPacket(sdes);
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}
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sender.Send();
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}
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} // namespace webrtc
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