dc80bae2a6
Clean some logs and add asserts in the way. BUG=3153 R=mflodman@webrtc.org, stefan@webrtc.org Review URL: https://webrtc-codereview.appspot.com/11129004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5861 4adac7df-926f-26a2-2b94-8c16560cd09d
303 lines
12 KiB
C++
303 lines
12 KiB
C++
/*
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* Copyright (c) 2014 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.h"
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#include "webrtc/modules/rtp_rtcp/source/rtp_utility.h"
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#include "webrtc/system_wrappers/interface/logging.h"
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namespace webrtc {
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namespace rtcp {
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namespace {
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void AssignUWord8(uint8_t* buffer, uint16_t* offset, uint8_t value) {
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buffer[(*offset)++] = value;
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}
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void AssignUWord16(uint8_t* buffer, uint16_t* offset, uint16_t value) {
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ModuleRTPUtility::AssignUWord16ToBuffer(buffer + *offset, value);
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*offset += 2;
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}
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void AssignUWord24(uint8_t* buffer, uint16_t* offset, uint32_t value) {
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ModuleRTPUtility::AssignUWord24ToBuffer(buffer + *offset, value);
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*offset += 3;
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}
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void AssignUWord32(uint8_t* buffer, uint16_t* offset, uint32_t value) {
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ModuleRTPUtility::AssignUWord32ToBuffer(buffer + *offset, value);
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*offset += 4;
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}
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// From RFC 3550, RTP: A Transport Protocol for Real-Time Applications.
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//
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// Sender report
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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=SR=200 | length |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | SSRC of sender |
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// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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// | NTP timestamp, most significant word |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | NTP timestamp, least significant word |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | RTP timestamp |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | sender's packet count |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | sender's octet count |
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// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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void CreateSenderReport(const RTCPUtility::RTCPPacketSR& sr,
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uint8_t* buffer,
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uint16_t* pos) {
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const uint16_t kLength = 6 + (6 * sr.NumberOfReportBlocks);
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AssignUWord8(buffer, pos, 0x80 + sr.NumberOfReportBlocks);
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AssignUWord8(buffer, pos, RTCPUtility::PT_SR);
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AssignUWord16(buffer, pos, kLength);
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AssignUWord32(buffer, pos, sr.SenderSSRC);
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AssignUWord32(buffer, pos, sr.NTPMostSignificant);
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AssignUWord32(buffer, pos, sr.NTPLeastSignificant);
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AssignUWord32(buffer, pos, sr.RTPTimestamp);
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AssignUWord32(buffer, pos, sr.SenderPacketCount);
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AssignUWord32(buffer, pos, sr.SenderOctetCount);
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}
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// Receiver report, header (RFC 3550).
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//
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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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void CreateReceiverReport(const RTCPUtility::RTCPPacketRR& rr,
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uint8_t* buffer,
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uint16_t* pos) {
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const uint16_t kLength = 1 + (6 * rr.NumberOfReportBlocks);
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AssignUWord8(buffer, pos, 0x80 + rr.NumberOfReportBlocks);
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AssignUWord8(buffer, pos, RTCPUtility::PT_RR);
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AssignUWord16(buffer, pos, kLength);
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AssignUWord32(buffer, pos, rr.SenderSSRC);
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}
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// Report block (RFC 3550).
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//
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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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// | SSRC_1 (SSRC of first source) |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | fraction lost | cumulative number of packets lost |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | extended highest sequence number received |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | interarrival jitter |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | last SR (LSR) |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | delay since last SR (DLSR) |
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// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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void CreateReportBlock(
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const RTCPUtility::RTCPPacketReportBlockItem& report_block,
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uint8_t* buffer,
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uint16_t* pos) {
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AssignUWord32(buffer, pos, report_block.SSRC);
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AssignUWord8(buffer, pos, report_block.FractionLost);
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AssignUWord24(buffer, pos, report_block.CumulativeNumOfPacketsLost);
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AssignUWord32(buffer, pos, report_block.ExtendedHighestSequenceNumber);
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AssignUWord32(buffer, pos, report_block.Jitter);
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AssignUWord32(buffer, pos, report_block.LastSR);
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AssignUWord32(buffer, pos, report_block.DelayLastSR);
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}
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// Bye packet (BYE) (RFC 3550).
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//
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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| SC | PT=BYE=203 | length |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | SSRC/CSRC |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// : ... :
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// +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
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// (opt) | length | reason for leaving ...
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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void CreateBye(const RTCPUtility::RTCPPacketBYE& bye,
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const std::vector<uint32_t>& csrcs,
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uint8_t* buffer,
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uint16_t* pos) {
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const uint8_t kNumSsrcAndCsrcs = 1 + csrcs.size();
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AssignUWord8(buffer, pos, 0x80 + kNumSsrcAndCsrcs);
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AssignUWord8(buffer, pos, RTCPUtility::PT_BYE);
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AssignUWord16(buffer, pos, kNumSsrcAndCsrcs);
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AssignUWord32(buffer, pos, bye.SenderSSRC);
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for (std::vector<uint32_t>::const_iterator it = csrcs.begin();
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it != csrcs.end(); ++it) {
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AssignUWord32(buffer, pos, *it);
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}
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}
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// RFC 4585: 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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// | SSRC of packet sender |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | SSRC of media source |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// : Feedback Control Information (FCI) :
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// :
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//
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// Full intra request (FIR) (RFC 5104).
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//
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// FCI:
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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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// | SSRC |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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// | Seq nr. | Reserved |
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// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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void CreateFirRequest(const RTCPUtility::RTCPPacketPSFBFIR& fir,
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const RTCPUtility::RTCPPacketPSFBFIRItem& fir_item,
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uint8_t* buffer,
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uint16_t* pos) {
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const uint16_t kLength = 4;
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const uint8_t kFmt = 4;
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AssignUWord8(buffer, pos, 0x80 + kFmt);
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AssignUWord8(buffer, pos, RTCPUtility::PT_PSFB);
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AssignUWord16(buffer, pos, kLength);
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AssignUWord32(buffer, pos, fir.SenderSSRC);
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AssignUWord32(buffer, pos, 0);
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AssignUWord32(buffer, pos, fir_item.SSRC);
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AssignUWord8(buffer, pos, fir_item.CommandSequenceNumber);
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AssignUWord24(buffer, pos, 0);
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}
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void AppendReportBlocks(const std::vector<ReportBlock*>& report_blocks,
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uint8_t* buffer,
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uint16_t* pos) {
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for (std::vector<ReportBlock*>::const_iterator it = report_blocks.begin();
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it != report_blocks.end(); ++it) {
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(*it)->Create(buffer, pos);
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}
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}
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} // namespace
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void RtcpPacket::Append(RtcpPacket* packet) {
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assert(packet);
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appended_packets_.push_back(packet);
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}
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RawPacket RtcpPacket::Build() const {
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uint16_t len = 0;
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uint8_t packet[IP_PACKET_SIZE];
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CreateAndAddAppended(packet, &len, IP_PACKET_SIZE);
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return RawPacket(packet, len);
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}
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void RtcpPacket::Build(uint8_t* packet, uint16_t* len, uint16_t max_len) const {
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*len = 0;
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CreateAndAddAppended(packet, len, max_len);
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}
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void RtcpPacket::CreateAndAddAppended(uint8_t* packet,
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uint16_t* len,
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uint16_t max_len) const {
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Create(packet, len, max_len);
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for (std::vector<RtcpPacket*>::const_iterator it = appended_packets_.begin();
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it != appended_packets_.end(); ++it) {
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(*it)->CreateAndAddAppended(packet, len, max_len);
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}
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}
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void Empty::Create(uint8_t* packet, uint16_t* len, uint16_t max_len) const {
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}
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void SenderReport::Create(uint8_t* packet,
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uint16_t* len,
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uint16_t max_len) const {
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if (*len + Length() > max_len) {
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LOG(LS_WARNING) << "Max packet size reached.";
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return;
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}
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CreateSenderReport(sr_, packet, len);
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AppendReportBlocks(report_blocks_, packet, len);
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}
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void SenderReport::WithReportBlock(ReportBlock* block) {
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assert(block);
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if (report_blocks_.size() >= kMaxNumberOfReportBlocks) {
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LOG(LS_WARNING) << "Max report blocks reached.";
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return;
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}
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report_blocks_.push_back(block);
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sr_.NumberOfReportBlocks = report_blocks_.size();
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}
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void ReceiverReport::Create(uint8_t* packet,
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uint16_t* len,
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uint16_t max_len) const {
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if (*len + Length() > max_len) {
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LOG(LS_WARNING) << "Max packet size reached.";
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return;
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}
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CreateReceiverReport(rr_, packet, len);
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AppendReportBlocks(report_blocks_, packet, len);
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}
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void ReceiverReport::WithReportBlock(ReportBlock* block) {
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assert(block);
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if (report_blocks_.size() >= kMaxNumberOfReportBlocks) {
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LOG(LS_WARNING) << "Max report blocks reached.";
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return;
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}
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report_blocks_.push_back(block);
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rr_.NumberOfReportBlocks = report_blocks_.size();
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}
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void Bye::Create(uint8_t* packet, uint16_t* len, uint16_t max_len) const {
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if (*len + Length() > max_len) {
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LOG(LS_WARNING) << "Max packet size reached.";
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return;
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}
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CreateBye(bye_, csrcs_, packet, len);
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}
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void Bye::WithCsrc(uint32_t csrc) {
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if (csrcs_.size() >= kMaxNumberOfCsrcs) {
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LOG(LS_WARNING) << "Max CSRC size reached.";
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return;
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}
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csrcs_.push_back(csrc);
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}
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void Fir::Create(uint8_t* packet, uint16_t* len, uint16_t max_len) const {
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if (*len + Length() > max_len) {
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LOG(LS_WARNING) << "Max packet size reached.";
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return;
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}
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CreateFirRequest(fir_, fir_item_, packet, len);
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}
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void ReportBlock::Create(uint8_t* packet, uint16_t* len) const {
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CreateReportBlock(report_block_, packet, len);
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}
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} // namespace rtcp
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} // namespace webrtc
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