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283 lines
7.5 KiB
C++
283 lines
7.5 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 "rtppacketbuilder.h"
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#include "rtperrors.h"
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#include "rtppacket.h"
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#include "rtpsources.h"
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#include <time.h>
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#include <stdlib.h>
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namespace qrtplib
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{
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RTPPacketBuilder::RTPPacketBuilder(RTPRandom &r) :
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rtprnd(r),
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maxpacksize(0),
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buffer(0),
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packetlength(0),
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lastwallclocktime(0, 0)
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{
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init = false;
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deftsset = false;
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defptset = false;
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defmarkset = false;
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defaultmark = false;
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defaulttimestampinc = 0;
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ssrc = 0;
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timestamp = 0;
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seqnr = 0;
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prevrtptimestamp = 0;
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lastrtptimestamp = 0;
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defaultpayloadtype = 0;
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numcsrcs = 0;
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numpayloadbytes = 0;
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numpackets = 0;
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memset((char *) csrcs, 0, RTP_MAXCSRCS*sizeof(uint32_t));
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timeinit.Dummy();
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//std::cout << (void *)(&rtprnd) << std::endl;
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}
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RTPPacketBuilder::~RTPPacketBuilder()
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{
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Destroy();
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}
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int RTPPacketBuilder::Init(unsigned int max)
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{
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if (init)
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return ERR_RTP_PACKBUILD_ALREADYINIT;
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if (max <= 0)
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return ERR_RTP_PACKBUILD_INVALIDMAXPACKETSIZE;
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maxpacksize = max;
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buffer = new uint8_t[max];
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packetlength = 0;
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numpackets = 0;
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CreateNewSSRC();
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deftsset = false;
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defptset = false;
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defmarkset = false;
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numcsrcs = 0;
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init = true;
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return 0;
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}
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void RTPPacketBuilder::Destroy()
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{
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if (!init)
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return;
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delete[] buffer;
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init = false;
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}
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int RTPPacketBuilder::SetMaximumPacketSize(unsigned int max)
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{
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uint8_t *newbuf;
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if (max <= 0)
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return ERR_RTP_PACKBUILD_INVALIDMAXPACKETSIZE;
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newbuf = new uint8_t[max];
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delete[] buffer;
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buffer = newbuf;
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maxpacksize = max;
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return 0;
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}
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int RTPPacketBuilder::AddCSRC(uint32_t csrc)
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{
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if (!init)
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return ERR_RTP_PACKBUILD_NOTINIT;
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if (numcsrcs >= RTP_MAXCSRCS)
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return ERR_RTP_PACKBUILD_CSRCLISTFULL;
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int i;
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for (i = 0; i < numcsrcs; i++)
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{
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if (csrcs[i] == csrc)
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return ERR_RTP_PACKBUILD_CSRCALREADYINLIST;
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}
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csrcs[numcsrcs] = csrc;
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numcsrcs++;
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return 0;
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}
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int RTPPacketBuilder::DeleteCSRC(uint32_t csrc)
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{
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if (!init)
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return ERR_RTP_PACKBUILD_NOTINIT;
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int i = 0;
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bool found = false;
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while (!found && i < numcsrcs)
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{
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if (csrcs[i] == csrc)
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found = true;
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else
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i++;
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}
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if (!found)
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return ERR_RTP_PACKBUILD_CSRCNOTINLIST;
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// move the last csrc in the place of the deleted one
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numcsrcs--;
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if (numcsrcs > 0 && numcsrcs != i)
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csrcs[i] = csrcs[numcsrcs];
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return 0;
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}
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void RTPPacketBuilder::ClearCSRCList()
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{
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if (!init)
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return;
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numcsrcs = 0;
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}
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uint32_t RTPPacketBuilder::CreateNewSSRC()
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{
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ssrc = rtprnd.GetRandom32();
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timestamp = rtprnd.GetRandom32();
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seqnr = rtprnd.GetRandom16();
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qDebug("RTPPacketBuilder::CreateNewSSRC: timestamp: %u", timestamp);
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// p 38: the count SHOULD be reset if the sender changes its SSRC identifier
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numpayloadbytes = 0;
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numpackets = 0;
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return ssrc;
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}
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uint32_t RTPPacketBuilder::CreateNewSSRC(RTPSources &sources)
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{
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bool found;
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do
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{
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ssrc = rtprnd.GetRandom32();
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found = sources.GotEntry(ssrc);
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} while (found);
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timestamp = rtprnd.GetRandom32();
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seqnr = rtprnd.GetRandom16();
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// p 38: the count SHOULD be reset if the sender changes its SSRC identifier
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numpayloadbytes = 0;
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numpackets = 0;
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return ssrc;
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}
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int RTPPacketBuilder::BuildPacket(const void *data, unsigned int len)
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{
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if (!init)
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return ERR_RTP_PACKBUILD_NOTINIT;
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if (!defptset)
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return ERR_RTP_PACKBUILD_DEFAULTPAYLOADTYPENOTSET;
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if (!defmarkset)
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return ERR_RTP_PACKBUILD_DEFAULTMARKNOTSET;
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if (!deftsset)
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return ERR_RTP_PACKBUILD_DEFAULTTSINCNOTSET;
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return PrivateBuildPacket(data, len, defaultpayloadtype, defaultmark, defaulttimestampinc, false);
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}
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int RTPPacketBuilder::BuildPacket(const void *data, unsigned int len, uint8_t pt, bool mark, uint32_t timestampinc)
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{
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if (!init)
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return ERR_RTP_PACKBUILD_NOTINIT;
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return PrivateBuildPacket(data, len, pt, mark, timestampinc, false);
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}
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int RTPPacketBuilder::BuildPacketEx(const void *data, unsigned int len, uint16_t hdrextID, const void *hdrextdata, unsigned int numhdrextwords)
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{
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if (!init)
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return ERR_RTP_PACKBUILD_NOTINIT;
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if (!defptset)
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return ERR_RTP_PACKBUILD_DEFAULTPAYLOADTYPENOTSET;
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if (!defmarkset)
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return ERR_RTP_PACKBUILD_DEFAULTMARKNOTSET;
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if (!deftsset)
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return ERR_RTP_PACKBUILD_DEFAULTTSINCNOTSET;
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return PrivateBuildPacket(data, len, defaultpayloadtype, defaultmark, defaulttimestampinc, true, hdrextID, hdrextdata, numhdrextwords);
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}
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int RTPPacketBuilder::BuildPacketEx(const void *data, unsigned int len, uint8_t pt, bool mark, uint32_t timestampinc, uint16_t hdrextID, const void *hdrextdata, unsigned int numhdrextwords)
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{
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if (!init)
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return ERR_RTP_PACKBUILD_NOTINIT;
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return PrivateBuildPacket(data, len, pt, mark, timestampinc, true, hdrextID, hdrextdata, numhdrextwords);
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}
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int RTPPacketBuilder::PrivateBuildPacket(const void *data, unsigned int len, uint8_t pt, bool mark, uint32_t timestampinc, bool gotextension, uint16_t hdrextID, const void *hdrextdata,
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unsigned int numhdrextwords)
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{
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RTPPacket p(pt, data, len, seqnr, timestamp, ssrc, mark, numcsrcs, csrcs, gotextension, hdrextID, (uint16_t) numhdrextwords, hdrextdata, buffer, maxpacksize);
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int status = p.GetCreationError();
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if (status < 0)
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return status;
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packetlength = p.GetPacketLength();
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if (numpackets == 0) // first packet
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{
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lastwallclocktime = RTPTime::CurrentTime();
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lastrtptimestamp = timestamp;
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prevrtptimestamp = timestamp;
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}
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else if (timestamp != prevrtptimestamp)
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{
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lastwallclocktime = RTPTime::CurrentTime();
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lastrtptimestamp = timestamp;
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prevrtptimestamp = timestamp;
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}
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numpayloadbytes += (uint32_t) p.GetPayloadLength();
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numpackets++;
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timestamp += timestampinc;
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seqnr++;
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//qDebug("RTPPacketBuilder::PrivateBuildPacket: numpackets: %u timestamp: %u timestampinc: %u seqnr: %u", numpackets, timestamp, timestampinc, seqnr);
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return 0;
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}
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} // end namespace
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