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207 lines
6.7 KiB
C++
207 lines
6.7 KiB
C++
/*
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This file is a part of JRTPLIB
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Copyright (c) 1999-2017 Jori Liesenborgs
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Contact: jori.liesenborgs@gmail.com
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This library was developed at the Expertise Centre for Digital Media
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(http://www.edm.uhasselt.be), a research center of the Hasselt University
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(http://www.uhasselt.be). The library is based upon work done for
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my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
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Permission is hereby granted, free of charge, to any person obtaining a
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copy of this software and associated documentation files (the "Software"),
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to deal in the Software without restriction, including without limitation
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the rights to use, copy, modify, merge, publish, distribute, sublicense,
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and/or sell copies of the Software, and to permit persons to whom the
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Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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IN THE SOFTWARE.
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*/
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/**
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* \file rtcprrpacket.h
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*/
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#ifndef RTCPRRPACKET_H
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#define RTCPRRPACKET_H
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#include "rtpconfig.h"
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#include "rtcppacket.h"
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#include "rtpstructs.h"
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#include "rtpendian.h"
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#include "export.h"
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namespace qrtplib
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{
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class RTCPCompoundPacket;
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/** Describes an RTCP receiver report packet. */
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class QRTPLIB_API RTCPRRPacket: public RTCPPacket
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{
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public:
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/** Creates an instance based on the data in \c data with length \c datalen.
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* Creates an instance based on the data in \c data with length \c datalen. Since the \c data pointer
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* is referenced inside the class (no copy of the data is made) one must make sure that the memory it points
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* to is valid as long as the class instance exists.
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*/
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RTCPRRPacket(uint8_t *data, std::size_t datalen);
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~RTCPRRPacket()
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{
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}
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/** Returns the SSRC of the participant who sent this packet. */
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uint32_t GetSenderSSRC() const;
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/** Returns the number of reception report blocks present in this packet. */
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int GetReceptionReportCount() const;
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/** Returns the SSRC of the reception report block described by \c index which may have a value
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* from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if \c index is
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* valid).
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*/
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uint32_t GetSSRC(int index) const;
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/** Returns the `fraction lost' field of the reception report described by \c index which may have
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* a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if \c index is
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* valid).
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*/
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uint8_t GetFractionLost(int index) const;
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/** Returns the number of lost packets in the reception report block described by \c index which may have
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* a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if \c index is
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* valid).
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*/
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int32_t GetLostPacketCount(int index) const;
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/** Returns the extended highest sequence number of the reception report block described by \c index which may have
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* a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if \c index is
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* valid).
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*/
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uint32_t GetExtendedHighestSequenceNumber(int index) const;
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/** Returns the jitter field of the reception report block described by \c index which may have
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* a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if \c index is
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* valid).
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*/
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uint32_t GetJitter(int index) const;
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/** Returns the LSR field of the reception report block described by \c index which may have
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* a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if \c index is
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* valid).
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*/
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uint32_t GetLSR(int index) const;
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/** Returns the DLSR field of the reception report block described by \c index which may have
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* a value from 0 to GetReceptionReportCount()-1 (note that no check is performed to see if \c index is
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* valid).
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*/
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uint32_t GetDLSR(int index) const;
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private:
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RTCPReceiverReport *GotoReport(int index) const;
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RTPEndian m_endian;
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};
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inline uint32_t RTCPRRPacket::GetSenderSSRC() const
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{
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if (!knownformat)
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return 0;
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uint32_t *ssrcptr = (uint32_t *) (data + sizeof(RTCPCommonHeader));
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return m_endian.qToHost(*ssrcptr);
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}
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inline int RTCPRRPacket::GetReceptionReportCount() const
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{
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if (!knownformat)
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return 0;
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RTCPCommonHeader *hdr = (RTCPCommonHeader *) data;
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return ((int) hdr->count);
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}
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inline RTCPReceiverReport *RTCPRRPacket::GotoReport(int index) const
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{
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RTCPReceiverReport *r = (RTCPReceiverReport *) (data + sizeof(RTCPCommonHeader) + sizeof(uint32_t) + index * sizeof(RTCPReceiverReport));
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return r;
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}
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inline uint32_t RTCPRRPacket::GetSSRC(int index) const
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{
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if (!knownformat)
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return 0;
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RTCPReceiverReport *r = GotoReport(index);
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return m_endian.qToHost(r->ssrc);
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}
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inline uint8_t RTCPRRPacket::GetFractionLost(int index) const
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{
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if (!knownformat)
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return 0;
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RTCPReceiverReport *r = GotoReport(index);
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return r->fractionlost;
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}
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inline int32_t RTCPRRPacket::GetLostPacketCount(int index) const
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{
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if (!knownformat)
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return 0;
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RTCPReceiverReport *r = GotoReport(index);
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uint32_t count = ((uint32_t) r->packetslost[2]) | (((uint32_t) r->packetslost[1]) << 8) | (((uint32_t) r->packetslost[0]) << 16);
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if ((count & 0x00800000) != 0) // test for negative number
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count |= 0xFF000000;
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int32_t *count2 = (int32_t *) (&count);
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return (*count2);
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}
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inline uint32_t RTCPRRPacket::GetExtendedHighestSequenceNumber(int index) const
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{
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if (!knownformat)
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return 0;
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RTCPReceiverReport *r = GotoReport(index);
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return m_endian.qToHost(r->exthighseqnr);
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}
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inline uint32_t RTCPRRPacket::GetJitter(int index) const
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{
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if (!knownformat)
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return 0;
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RTCPReceiverReport *r = GotoReport(index);
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return m_endian.qToHost(r->jitter);
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}
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inline uint32_t RTCPRRPacket::GetLSR(int index) const
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{
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if (!knownformat)
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return 0;
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RTCPReceiverReport *r = GotoReport(index);
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return m_endian.qToHost(r->lsr);
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}
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inline uint32_t RTCPRRPacket::GetDLSR(int index) const
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{
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if (!knownformat)
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return 0;
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RTCPReceiverReport *r = GotoReport(index);
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return m_endian.qToHost(r->dlsr);
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}
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} // end namespace
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#endif // RTCPRRPACKET_H
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