mirror of
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739 lines
22 KiB
C++
739 lines
22 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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#include "rtcppacketbuilder.h"
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#include "rtpsources.h"
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#include "rtppacketbuilder.h"
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#include "rtcpscheduler.h"
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#include "rtpsourcedata.h"
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#include "rtcpcompoundpacketbuilder.h"
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namespace qrtplib
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{
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RTCPPacketBuilder::RTCPPacketBuilder(RTPSources &s, RTPPacketBuilder &pb) :
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sources(s), rtppacketbuilder(pb), prevbuildtime(0, 0), transmissiondelay(0, 0)
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{
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init = false;
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timeinit.Dummy();
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}
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RTCPPacketBuilder::~RTCPPacketBuilder()
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{
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Destroy();
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}
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int RTCPPacketBuilder::Init(std::size_t maxpacksize, double tsunit, const void *cname, std::size_t cnamelen)
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{
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if (init)
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return ERR_RTP_RTCPPACKETBUILDER_ALREADYINIT;
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if (maxpacksize < RTP_MINPACKETSIZE)
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return ERR_RTP_RTCPPACKETBUILDER_ILLEGALMAXPACKSIZE;
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if (tsunit < 0.0)
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return ERR_RTP_RTCPPACKETBUILDER_ILLEGALTIMESTAMPUNIT;
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if (cnamelen > 255)
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cnamelen = 255;
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maxpacketsize = maxpacksize;
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timestampunit = tsunit;
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int status;
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if ((status = ownsdesinfo.SetCNAME((const uint8_t *) cname, cnamelen)) < 0)
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return status;
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ClearAllSourceFlags();
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interval_name = -1;
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interval_email = -1;
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interval_location = -1;
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interval_phone = -1;
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interval_tool = -1;
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interval_note = -1;
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sdesbuildcount = 0;
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transmissiondelay = RTPTime(0, 0);
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firstpacket = true;
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processingsdes = false;
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init = true;
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return 0;
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}
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void RTCPPacketBuilder::Destroy()
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{
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if (!init)
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return;
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ownsdesinfo.Clear();
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init = false;
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}
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int RTCPPacketBuilder::BuildNextPacket(RTCPCompoundPacket **pack)
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{
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if (!init)
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return ERR_RTP_RTCPPACKETBUILDER_NOTINIT;
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RTCPCompoundPacketBuilder *rtcpcomppack;
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int status;
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bool sender = false;
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RTPSourceData *srcdat;
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*pack = 0;
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rtcpcomppack = new RTCPCompoundPacketBuilder();
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if ((status = rtcpcomppack->InitBuild(maxpacketsize)) < 0)
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{
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delete rtcpcomppack;
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return status;
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}
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if ((srcdat = sources.GetOwnSourceInfo()) != 0)
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{
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if (srcdat->IsSender())
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sender = true;
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}
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uint32_t ssrc = rtppacketbuilder.GetSSRC();
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RTPTime curtime = RTPTime::CurrentTime();
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if (sender)
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{
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RTPTime rtppacktime = rtppacketbuilder.GetPacketTime();
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uint32_t rtppacktimestamp = rtppacketbuilder.GetPacketTimestamp();
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uint32_t packcount = rtppacketbuilder.GetPacketCount();
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uint32_t octetcount = rtppacketbuilder.GetPayloadOctetCount();
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RTPTime diff = curtime;
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diff -= rtppacktime;
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diff += transmissiondelay; // the sample being sampled at this very instant will need a larger timestamp
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uint32_t tsdiff = (uint32_t) ((diff.GetDouble() / timestampunit) + 0.5);
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uint32_t rtptimestamp = rtppacktimestamp + tsdiff;
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RTPNTPTime ntptimestamp = curtime.GetNTPTime();
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if ((status = rtcpcomppack->StartSenderReport(ssrc, ntptimestamp, rtptimestamp, packcount, octetcount)) < 0)
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{
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delete rtcpcomppack;
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if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
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return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
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return status;
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}
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}
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else
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{
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if ((status = rtcpcomppack->StartReceiverReport(ssrc)) < 0)
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{
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delete rtcpcomppack;
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if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
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return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
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return status;
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}
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}
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uint8_t *owncname;
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std::size_t owncnamelen;
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owncname = ownsdesinfo.GetCNAME(&owncnamelen);
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if ((status = rtcpcomppack->AddSDESSource(ssrc)) < 0)
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{
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delete rtcpcomppack;
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if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
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return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
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return status;
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}
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if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::CNAME, owncname, owncnamelen)) < 0)
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{
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delete rtcpcomppack;
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if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
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return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
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return status;
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}
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if (!processingsdes)
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{
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int added, skipped;
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bool full, atendoflist;
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if ((status = FillInReportBlocks(rtcpcomppack, curtime, sources.GetTotalCount(), &full, &added, &skipped, &atendoflist)) < 0)
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{
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delete rtcpcomppack;
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return status;
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}
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if (full && added == 0)
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{
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delete rtcpcomppack;
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return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
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}
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if (!full)
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{
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processingsdes = true;
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sdesbuildcount++;
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ClearAllSourceFlags();
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doname = false;
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doemail = false;
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doloc = false;
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dophone = false;
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dotool = false;
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donote = false;
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if (interval_name > 0 && ((sdesbuildcount % interval_name) == 0))
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doname = true;
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if (interval_email > 0 && ((sdesbuildcount % interval_email) == 0))
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doemail = true;
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if (interval_location > 0 && ((sdesbuildcount % interval_location) == 0))
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doloc = true;
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if (interval_phone > 0 && ((sdesbuildcount % interval_phone) == 0))
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dophone = true;
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if (interval_tool > 0 && ((sdesbuildcount % interval_tool) == 0))
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dotool = true;
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if (interval_note > 0 && ((sdesbuildcount % interval_note) == 0))
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donote = true;
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bool processedall;
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int itemcount;
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if ((status = FillInSDES(rtcpcomppack, &full, &processedall, &itemcount)) < 0)
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{
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delete rtcpcomppack;
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return status;
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}
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if (processedall)
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{
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processingsdes = false;
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ClearAllSDESFlags();
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if (!full && skipped > 0)
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{
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// if the packet isn't full and we skipped some
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// sources that we already got in a previous packet,
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// we can add some of them now
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bool atendoflist;
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if ((status = FillInReportBlocks(rtcpcomppack, curtime, skipped, &full, &added, &skipped, &atendoflist)) < 0)
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{
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delete rtcpcomppack;
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return status;
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}
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}
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}
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}
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}
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else // previous sdes processing wasn't finished
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{
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bool processedall;
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int itemcount;
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bool full;
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if ((status = FillInSDES(rtcpcomppack, &full, &processedall, &itemcount)) < 0)
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{
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delete rtcpcomppack;
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return status;
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}
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if (itemcount == 0) // Big problem: packet size is too small to let any progress happen
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{
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delete rtcpcomppack;
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return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
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}
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if (processedall)
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{
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processingsdes = false;
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ClearAllSDESFlags();
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if (!full)
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{
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// if the packet isn't full and we skipped some
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// we can add some report blocks
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int added, skipped;
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bool atendoflist;
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if ((status = FillInReportBlocks(rtcpcomppack, curtime, sources.GetTotalCount(), &full, &added, &skipped, &atendoflist)) < 0)
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{
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delete rtcpcomppack;
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return status;
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}
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if (atendoflist) // filled in all possible sources
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ClearAllSourceFlags();
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}
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}
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}
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if ((status = rtcpcomppack->EndBuild()) < 0)
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{
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delete rtcpcomppack;
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return status;
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}
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*pack = rtcpcomppack;
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firstpacket = false;
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prevbuildtime = curtime;
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return 0;
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}
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void RTCPPacketBuilder::ClearAllSourceFlags()
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{
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if (sources.GotoFirstSource())
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{
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do
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{
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RTPSourceData *srcdat = sources.GetCurrentSourceInfo();
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srcdat->SetProcessedInRTCP(false);
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} while (sources.GotoNextSource());
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}
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}
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int RTCPPacketBuilder::FillInReportBlocks(RTCPCompoundPacketBuilder *rtcpcomppack, const RTPTime &curtime, int maxcount, bool *full, int *added, int *skipped, bool *atendoflist)
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{
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RTPSourceData *srcdat;
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int addedcount = 0;
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int skippedcount = 0;
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bool done = false;
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bool filled = false;
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bool atend = false;
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int status;
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if (sources.GotoFirstSource())
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{
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do
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{
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bool shouldprocess = false;
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srcdat = sources.GetCurrentSourceInfo();
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if (!srcdat->IsOwnSSRC()) // don't send to ourselves
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{
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if (!srcdat->IsCSRC()) // p 35: no reports should go to CSRCs
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{
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if (srcdat->INF_HasSentData()) // if this isn't true, INF_GetLastRTPPacketTime() won't make any sense
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{
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if (firstpacket)
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shouldprocess = true;
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else
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{
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// p 35: only if rtp packets were received since the last RTP packet, a report block
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// should be added
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RTPTime lastrtptime = srcdat->INF_GetLastRTPPacketTime();
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if (lastrtptime > prevbuildtime)
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shouldprocess = true;
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}
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}
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}
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}
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if (shouldprocess)
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{
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if (srcdat->IsProcessedInRTCP()) // already covered this one
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{
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skippedcount++;
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}
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else
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{
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uint32_t rr_ssrc = srcdat->GetSSRC();
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uint32_t num = srcdat->INF_GetNumPacketsReceivedInInterval();
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uint32_t prevseq = srcdat->INF_GetSavedExtendedSequenceNumber();
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uint32_t curseq = srcdat->INF_GetExtendedHighestSequenceNumber();
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uint32_t expected = curseq - prevseq;
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uint8_t fraclost;
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if (expected < num) // got duplicates
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fraclost = 0;
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else
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{
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double lost = (double) (expected - num);
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double frac = lost / ((double) expected);
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fraclost = (uint8_t) (frac * 256.0);
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}
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expected = curseq - srcdat->INF_GetBaseSequenceNumber();
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num = srcdat->INF_GetNumPacketsReceived();
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uint32_t diff = expected - num;
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int32_t *packlost = (int32_t *) &diff;
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uint32_t jitter = srcdat->INF_GetJitter();
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uint32_t lsr;
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uint32_t dlsr;
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if (!srcdat->SR_HasInfo())
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{
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lsr = 0;
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dlsr = 0;
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}
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else
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{
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RTPNTPTime srtime = srcdat->SR_GetNTPTimestamp();
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uint32_t m = (srtime.GetMSW() & 0xFFFF);
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uint32_t l = ((srtime.GetLSW() >> 16) & 0xFFFF);
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lsr = ((m << 16) | l);
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RTPTime diff = curtime;
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diff -= srcdat->SR_GetReceiveTime();
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double diff2 = diff.GetDouble();
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diff2 *= 65536.0;
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dlsr = (uint32_t) diff2;
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}
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status = rtcpcomppack->AddReportBlock(rr_ssrc, fraclost, *packlost, curseq, jitter, lsr, dlsr);
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if (status < 0)
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{
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if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
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{
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done = true;
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filled = true;
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}
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else
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return status;
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}
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else
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{
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addedcount++;
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if (addedcount >= maxcount)
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{
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done = true;
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if (!sources.GotoNextSource())
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atend = true;
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}
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srcdat->INF_StartNewInterval();
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srcdat->SetProcessedInRTCP(true);
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}
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}
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}
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if (!done)
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{
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if (!sources.GotoNextSource())
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{
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atend = true;
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done = true;
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}
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}
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} while (!done);
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}
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*added = addedcount;
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*skipped = skippedcount;
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*full = filled;
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if (!atend) // search for available sources
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{
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bool shouldprocess = false;
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do
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{
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srcdat = sources.GetCurrentSourceInfo();
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if (!srcdat->IsOwnSSRC()) // don't send to ourselves
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{
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if (!srcdat->IsCSRC()) // p 35: no reports should go to CSRCs
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{
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if (srcdat->INF_HasSentData()) // if this isn't true, INF_GetLastRTPPacketTime() won't make any sense
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{
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if (firstpacket)
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shouldprocess = true;
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else
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{
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// p 35: only if rtp packets were received since the last RTP packet, a report block
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// should be added
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RTPTime lastrtptime = srcdat->INF_GetLastRTPPacketTime();
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if (lastrtptime > prevbuildtime)
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shouldprocess = true;
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}
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}
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}
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}
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if (shouldprocess)
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{
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if (srcdat->IsProcessedInRTCP())
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shouldprocess = false;
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}
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if (!shouldprocess)
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{
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if (!sources.GotoNextSource())
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atend = true;
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}
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} while (!atend && !shouldprocess);
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}
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*atendoflist = atend;
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return 0;
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}
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int RTCPPacketBuilder::FillInSDES(RTCPCompoundPacketBuilder *rtcpcomppack, bool *full, bool *processedall, int *added)
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{
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int status;
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uint8_t *data;
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std::size_t datalen;
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*full = false;
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*processedall = false;
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*added = 0;
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// We don't need to add a SSRC for our own data, this is still set
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// from adding the CNAME
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if (doname)
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{
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if (!ownsdesinfo.ProcessedName())
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{
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data = ownsdesinfo.GetName(&datalen);
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if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::NAME, data, datalen)) < 0)
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{
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if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
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{
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*full = true;
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return 0;
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}
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}
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(*added)++;
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ownsdesinfo.SetProcessedName(true);
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}
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}
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if (doemail)
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{
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if (!ownsdesinfo.ProcessedEMail())
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{
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data = ownsdesinfo.GetEMail(&datalen);
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if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::EMAIL, data, datalen)) < 0)
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{
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if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
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{
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*full = true;
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return 0;
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}
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}
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(*added)++;
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ownsdesinfo.SetProcessedEMail(true);
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}
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}
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if (doloc)
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{
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if (!ownsdesinfo.ProcessedLocation())
|
|
{
|
|
data = ownsdesinfo.GetLocation(&datalen);
|
|
if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::LOC, data, datalen)) < 0)
|
|
{
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
{
|
|
*full = true;
|
|
return 0;
|
|
}
|
|
}
|
|
(*added)++;
|
|
ownsdesinfo.SetProcessedLocation(true);
|
|
}
|
|
}
|
|
if (dophone)
|
|
{
|
|
if (!ownsdesinfo.ProcessedPhone())
|
|
{
|
|
data = ownsdesinfo.GetPhone(&datalen);
|
|
if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::PHONE, data, datalen)) < 0)
|
|
{
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
{
|
|
*full = true;
|
|
return 0;
|
|
}
|
|
}
|
|
(*added)++;
|
|
ownsdesinfo.SetProcessedPhone(true);
|
|
}
|
|
}
|
|
if (dotool)
|
|
{
|
|
if (!ownsdesinfo.ProcessedTool())
|
|
{
|
|
data = ownsdesinfo.GetTool(&datalen);
|
|
if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::TOOL, data, datalen)) < 0)
|
|
{
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
{
|
|
*full = true;
|
|
return 0;
|
|
}
|
|
}
|
|
(*added)++;
|
|
ownsdesinfo.SetProcessedTool(true);
|
|
}
|
|
}
|
|
if (donote)
|
|
{
|
|
if (!ownsdesinfo.ProcessedNote())
|
|
{
|
|
data = ownsdesinfo.GetNote(&datalen);
|
|
if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::NOTE, data, datalen)) < 0)
|
|
{
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
{
|
|
*full = true;
|
|
return 0;
|
|
}
|
|
}
|
|
(*added)++;
|
|
ownsdesinfo.SetProcessedNote(true);
|
|
}
|
|
}
|
|
|
|
*processedall = true;
|
|
return 0;
|
|
}
|
|
|
|
void RTCPPacketBuilder::ClearAllSDESFlags()
|
|
{
|
|
ownsdesinfo.ClearFlags();
|
|
}
|
|
|
|
int RTCPPacketBuilder::BuildBYEPacket(RTCPCompoundPacket **pack, const void *reason, std::size_t reasonlength, bool useSRifpossible)
|
|
{
|
|
if (!init)
|
|
return ERR_RTP_RTCPPACKETBUILDER_NOTINIT;
|
|
|
|
RTCPCompoundPacketBuilder *rtcpcomppack;
|
|
int status;
|
|
|
|
if (reasonlength > 255)
|
|
reasonlength = 255;
|
|
|
|
*pack = 0;
|
|
|
|
rtcpcomppack = new RTCPCompoundPacketBuilder();
|
|
|
|
if ((status = rtcpcomppack->InitBuild(maxpacketsize)) < 0)
|
|
{
|
|
delete rtcpcomppack;
|
|
return status;
|
|
}
|
|
|
|
uint32_t ssrc = rtppacketbuilder.GetSSRC();
|
|
bool useSR = false;
|
|
|
|
if (useSRifpossible)
|
|
{
|
|
RTPSourceData *srcdat;
|
|
|
|
if ((srcdat = sources.GetOwnSourceInfo()) != 0)
|
|
{
|
|
if (srcdat->IsSender())
|
|
useSR = true;
|
|
}
|
|
}
|
|
|
|
if (useSR)
|
|
{
|
|
RTPTime curtime = RTPTime::CurrentTime();
|
|
RTPTime rtppacktime = rtppacketbuilder.GetPacketTime();
|
|
uint32_t rtppacktimestamp = rtppacketbuilder.GetPacketTimestamp();
|
|
uint32_t packcount = rtppacketbuilder.GetPacketCount();
|
|
uint32_t octetcount = rtppacketbuilder.GetPayloadOctetCount();
|
|
RTPTime diff = curtime;
|
|
diff -= rtppacktime;
|
|
|
|
uint32_t tsdiff = (uint32_t) ((diff.GetDouble() / timestampunit) + 0.5);
|
|
uint32_t rtptimestamp = rtppacktimestamp + tsdiff;
|
|
RTPNTPTime ntptimestamp = curtime.GetNTPTime();
|
|
|
|
if ((status = rtcpcomppack->StartSenderReport(ssrc, ntptimestamp, rtptimestamp, packcount, octetcount)) < 0)
|
|
{
|
|
delete rtcpcomppack;
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
|
|
return status;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if ((status = rtcpcomppack->StartReceiverReport(ssrc)) < 0)
|
|
{
|
|
delete rtcpcomppack;
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
|
|
return status;
|
|
}
|
|
}
|
|
|
|
uint8_t *owncname;
|
|
std::size_t owncnamelen;
|
|
|
|
owncname = ownsdesinfo.GetCNAME(&owncnamelen);
|
|
|
|
if ((status = rtcpcomppack->AddSDESSource(ssrc)) < 0)
|
|
{
|
|
delete rtcpcomppack;
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
|
|
return status;
|
|
}
|
|
if ((status = rtcpcomppack->AddSDESNormalItem(RTCPSDESPacket::CNAME, owncname, owncnamelen)) < 0)
|
|
{
|
|
delete rtcpcomppack;
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
|
|
return status;
|
|
}
|
|
|
|
uint32_t ssrcs[1];
|
|
|
|
ssrcs[0] = ssrc;
|
|
|
|
if ((status = rtcpcomppack->AddBYEPacket(ssrcs, 1, (const uint8_t *) reason, reasonlength)) < 0)
|
|
{
|
|
delete rtcpcomppack;
|
|
if (status == ERR_RTP_RTCPCOMPPACKBUILDER_NOTENOUGHBYTESLEFT)
|
|
return ERR_RTP_RTCPPACKETBUILDER_PACKETFILLEDTOOSOON;
|
|
return status;
|
|
}
|
|
|
|
if ((status = rtcpcomppack->EndBuild()) < 0)
|
|
{
|
|
delete rtcpcomppack;
|
|
return status;
|
|
}
|
|
|
|
*pack = rtcpcomppack;
|
|
return 0;
|
|
}
|
|
|
|
} // end namespace
|
|
|