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256 lines
7.1 KiB
C++
256 lines
7.1 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 "rtpinternalsourcedata.h"
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#include "rtppacket.h"
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#include <string.h>
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#define RTPINTERNALSOURCEDATA_MAXPROBATIONPACKETS 32
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namespace qrtplib
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{
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RTPInternalSourceData::RTPInternalSourceData(uint32_t ssrc) :
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RTPSourceData(ssrc)
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{
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}
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RTPInternalSourceData::~RTPInternalSourceData()
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{
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}
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// The following function should delete rtppack if necessary
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int RTPInternalSourceData::ProcessRTPPacket(RTPPacket *rtppack, const RTPTime &receivetime, bool *stored, RTPSources *sources)
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{
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bool accept;
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double tsunit;
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*stored = false;
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if (timestampunit < 0)
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tsunit = INF_GetEstimatedTimestampUnit();
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else
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tsunit = timestampunit;
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stats.ProcessPacket(rtppack, receivetime, tsunit, ownssrc, &accept);
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if (!accept)
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return 0;
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validated = true;
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if (validated && !ownssrc) // for own ssrc these variables depend on the outgoing packets, not on the incoming
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issender = true;
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bool isonprobation = !validated;
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bool ispackethandled = false;
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sources->OnValidatedRTPPacket(this, rtppack, isonprobation, &ispackethandled);
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if (ispackethandled) // Packet is already handled in the callback, no need to store it in the list
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{
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// Set 'stored' to true to avoid the packet being deallocated
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*stored = true;
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return 0;
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}
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// Now, we can place the packet in the queue
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if (packetlist.empty())
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{
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*stored = true;
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packetlist.push_back(rtppack);
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return 0;
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}
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if (!validated) // still on probation
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{
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// Make sure that we don't buffer too much packets to avoid wasting memory
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// on a bad source. Delete the packet in the queue with the lowest sequence
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// number.
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if (packetlist.size() == RTPINTERNALSOURCEDATA_MAXPROBATIONPACKETS)
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{
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RTPPacket *p = *(packetlist.begin());
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packetlist.pop_front();
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delete p;
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}
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}
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// find the right position to insert the packet
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std::list<RTPPacket*>::iterator it, start;
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bool done = false;
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uint32_t newseqnr = rtppack->GetExtendedSequenceNumber();
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it = packetlist.end();
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--it;
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start = packetlist.begin();
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while (!done)
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{
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RTPPacket *p;
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uint32_t seqnr;
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p = *it;
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seqnr = p->GetExtendedSequenceNumber();
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if (seqnr > newseqnr)
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{
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if (it != start)
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--it;
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else // we're at the start of the list
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{
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*stored = true;
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done = true;
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packetlist.push_front(rtppack);
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}
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}
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else if (seqnr < newseqnr) // insert after this packet
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{
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++it;
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packetlist.insert(it, rtppack);
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done = true;
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*stored = true;
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}
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else // they're equal !! Drop packet
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{
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done = true;
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}
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}
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return 0;
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}
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int RTPInternalSourceData::ProcessSDESItem(uint8_t sdesid, const uint8_t *data, std::size_t itemlen, const RTPTime &receivetime, bool *cnamecollis)
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{
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*cnamecollis = false;
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stats.SetLastMessageTime(receivetime);
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switch (sdesid)
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{
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case RTCP_SDES_ID_CNAME:
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{
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std::size_t curlen;
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uint8_t *oldcname;
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// NOTE: we're going to make sure that the CNAME is only set once.
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oldcname = SDESinf.GetCNAME(&curlen);
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if (curlen == 0)
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{
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// if CNAME is set, the source is validated
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SDESinf.SetCNAME(data, itemlen);
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validated = true;
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}
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else // check if this CNAME is equal to the one that is already present
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{
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if (curlen != itemlen)
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*cnamecollis = true;
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else
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{
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if (memcmp(data, oldcname, itemlen) != 0)
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*cnamecollis = true;
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}
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}
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}
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break;
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case RTCP_SDES_ID_NAME:
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{
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std::size_t oldlen;
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SDESinf.GetName(&oldlen);
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if (oldlen == 0) // Name not set
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return SDESinf.SetName(data, itemlen);
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}
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break;
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case RTCP_SDES_ID_EMAIL:
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{
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std::size_t oldlen;
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SDESinf.GetEMail(&oldlen);
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if (oldlen == 0)
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return SDESinf.SetEMail(data, itemlen);
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}
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break;
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case RTCP_SDES_ID_PHONE:
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return SDESinf.SetPhone(data, itemlen);
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case RTCP_SDES_ID_LOCATION:
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return SDESinf.SetLocation(data, itemlen);
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case RTCP_SDES_ID_TOOL:
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{
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std::size_t oldlen;
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SDESinf.GetTool(&oldlen);
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if (oldlen == 0)
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return SDESinf.SetTool(data, itemlen);
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}
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break;
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case RTCP_SDES_ID_NOTE:
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stats.SetLastNoteTime(receivetime);
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return SDESinf.SetNote(data, itemlen);
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}
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return 0;
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}
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#ifdef RTP_SUPPORT_SDESPRIV
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int RTPInternalSourceData::ProcessPrivateSDESItem(const uint8_t *prefix, std::size_t prefixlen, const uint8_t *value, std::size_t valuelen, const RTPTime &receivetime)
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{
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int status;
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stats.SetLastMessageTime(receivetime);
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status = SDESinf.SetPrivateValue(prefix, prefixlen, value, valuelen);
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if (status == ERR_RTP_SDES_MAXPRIVITEMS)
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return 0; // don't stop processing just because the number of items is full
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return status;
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}
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#endif // RTP_SUPPORT_SDESPRIV
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int RTPInternalSourceData::ProcessBYEPacket(const uint8_t *reason, std::size_t reasonlen, const RTPTime &receivetime)
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{
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if (byereason)
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{
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delete[] byereason;
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byereason = 0;
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byereasonlen = 0;
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}
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byetime = receivetime;
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byereason = new uint8_t[reasonlen];
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memcpy(byereason, reason, reasonlen);
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byereasonlen = reasonlen;
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receivedbye = true;
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stats.SetLastMessageTime(receivetime);
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return 0;
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}
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} // end namespace
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