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253 lines
8.8 KiB
C++
253 lines
8.8 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 rtpexternaltransmitter.h
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*/
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#ifndef RTPEXTERNALTRANSMITTER_H
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#define RTPEXTERNALTRANSMITTER_H
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#include "rtpconfig.h"
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#include "rtptransmitter.h"
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#include "rtpabortdescriptors.h"
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#include <list>
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namespace qrtplib
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{
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class RTPExternalTransmitter;
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/** Base class to specify a mechanism to transmit RTP packets outside of this library.
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* Base class to specify a mechanism to transmit RTP packets outside of this library. When
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* you want to use your own mechanism to transmit RTP packets, you need to specify that
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* you'll be using the external transmission component, and derive a class from this base
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* class. An instance should then be specified in the RTPExternalTransmissionParams object,
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* so that the transmitter will call the \c SendRTP, \c SendRTCP and \c ComesFromThisSender
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* methods of this instance when needed.
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*/
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class RTPExternalSender
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{
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public:
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RTPExternalSender()
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{
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}
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virtual ~RTPExternalSender()
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{
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}
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/** This member function will be called when RTP data needs to be transmitted. */
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virtual bool SendRTP(const void *data, std::size_t len) = 0;
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/** This member function will be called when an RTCP packet needs to be transmitted. */
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virtual bool SendRTCP(const void *data, std::size_t len) = 0;
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/** Used to identify if an RTPAddress instance originated from this sender (to be able to detect own packets). */
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virtual bool ComesFromThisSender(const RTPAddress *a) = 0;
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};
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/** Interface to inject incoming RTP and RTCP packets into the library.
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* Interface to inject incoming RTP and RTCP packets into the library. When you have your own
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* mechanism to receive incoming RTP/RTCP data, you'll need to pass these packets to the library.
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* By first retrieving the RTPExternalTransmissionInfo instance for the external transmitter you'll
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* be using, you can obtain the associated RTPExternalPacketInjecter instance. By calling it's
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* member functions, you can then inject RTP or RTCP data into the library for further processing.
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*/
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class RTPExternalPacketInjecter
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{
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public:
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RTPExternalPacketInjecter(RTPExternalTransmitter *trans)
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{
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transmitter = trans;
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}
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~RTPExternalPacketInjecter()
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{
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}
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/** This function can be called to insert an RTP packet into the transmission component. */
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void InjectRTP(const void *data, std::size_t len, const RTPAddress &a);
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/** This function can be called to insert an RTCP packet into the transmission component. */
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void InjectRTCP(const void *data, std::size_t len, const RTPAddress &a);
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/** Use this function to inject an RTP or RTCP packet and the transmitter will try to figure out which type of packet it is. */
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void InjectRTPorRTCP(const void *data, std::size_t len, const RTPAddress &a);
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private:
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RTPExternalTransmitter *transmitter;
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};
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/** Parameters to initialize a transmitter of type RTPExternalTransmitter. */
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class RTPExternalTransmissionParams: public RTPTransmissionParams
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{
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public:
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/** Using this constructor you can specify which RTPExternalSender object you'll be using
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* and how much the additional header overhead for each packet will be. */
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RTPExternalTransmissionParams(RTPExternalSender *s, int headeroverhead) :
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RTPTransmissionParams(RTPTransmitter::ExternalProto)
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{
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sender = s;
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headersize = headeroverhead;
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}
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RTPExternalSender *GetSender() const
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{
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return sender;
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}
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int GetAdditionalHeaderSize() const
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{
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return headersize;
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}
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private:
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RTPExternalSender *sender;
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int headersize;
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};
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/** Additional information about the external transmission component. */
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class RTPExternalTransmissionInfo: public RTPTransmissionInfo
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{
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public:
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RTPExternalTransmissionInfo(RTPExternalPacketInjecter *p) :
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RTPTransmissionInfo(RTPTransmitter::ExternalProto)
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{
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packetinjector = p;
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}
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/** Tells you which RTPExternalPacketInjecter you need to use to pass RTP or RTCP
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* data on to the transmission component. */
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RTPExternalPacketInjecter *GetPacketInjector() const
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{
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return packetinjector;
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}
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private:
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RTPExternalPacketInjecter *packetinjector;
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};
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/** A transmission component which will use user specified functions to transmit the data and
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* which will expose functions to inject received RTP or RTCP data into this component.
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* A transmission component which will use user specified functions to transmit the data and
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* which will expose functions to inject received RTP or RTCP data into this component. Use
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* a class derived from RTPExternalSender to specify the functions which need to be used for
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* sending the data. Obtain the RTPExternalTransmissionInfo object associated with this
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* transmitter to obtain the functions needed to pass RTP/RTCP packets on to the transmitter.
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*/
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class RTPExternalTransmitter: public RTPTransmitter
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{
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public:
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RTPExternalTransmitter();
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~RTPExternalTransmitter();
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int Init(bool treadsafe);
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int Create(std::size_t maxpacksize, const RTPTransmissionParams *transparams);
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void Destroy();
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RTPTransmissionInfo *GetTransmissionInfo();
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void DeleteTransmissionInfo(RTPTransmissionInfo *inf);
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int GetLocalHostName(uint8_t *buffer, std::size_t *bufferlength);
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bool ComesFromThisTransmitter(const RTPAddress *addr);
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std::size_t GetHeaderOverhead()
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{
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return headersize;
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}
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int Poll();
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int WaitForIncomingData(const RTPTime &delay, bool *dataavailable = 0);
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int AbortWait();
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int SendRTPData(const void *data, std::size_t len);
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int SendRTCPData(const void *data, std::size_t len);
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int AddDestination(const RTPAddress &addr);
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int DeleteDestination(const RTPAddress &addr);
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void ClearDestinations();
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bool SupportsMulticasting();
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int JoinMulticastGroup(const RTPAddress &addr);
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int LeaveMulticastGroup(const RTPAddress &addr);
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void LeaveAllMulticastGroups();
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int SetReceiveMode(RTPTransmitter::ReceiveMode m);
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int AddToIgnoreList(const RTPAddress &addr);
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int DeleteFromIgnoreList(const RTPAddress &addr);
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void ClearIgnoreList();
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int AddToAcceptList(const RTPAddress &addr);
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int DeleteFromAcceptList(const RTPAddress &addr);
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void ClearAcceptList();
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int SetMaximumPacketSize(std::size_t s);
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bool NewDataAvailable();
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RTPRawPacket *GetNextPacket();
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void InjectRTP(const void *data, std::size_t len, const RTPAddress &a);
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void InjectRTCP(const void *data, std::size_t len, const RTPAddress &a);
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void InjectRTPorRTCP(const void *data, std::size_t len, const RTPAddress &a);
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private:
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void FlushPackets();
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bool init;
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bool created;
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bool waitingfordata;
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RTPExternalSender *sender;
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RTPExternalPacketInjecter packetinjector;
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std::list<RTPRawPacket*> rawpacketlist;
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uint8_t *localhostname;
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std::size_t localhostnamelength;
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std::size_t maxpacksize;
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int headersize;
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RTPAbortDescriptors m_abortDesc;
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int m_abortCount;
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};
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inline void RTPExternalPacketInjecter::InjectRTP(const void *data, std::size_t len, const RTPAddress &a)
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{
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transmitter->InjectRTP(data, len, a);
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}
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inline void RTPExternalPacketInjecter::InjectRTCP(const void *data, std::size_t len, const RTPAddress &a)
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{
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transmitter->InjectRTCP(data, len, a);
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}
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inline void RTPExternalPacketInjecter::InjectRTPorRTCP(const void *data, std::size_t len, const RTPAddress &a)
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{
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transmitter->InjectRTPorRTCP(data, len, a);
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}
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} // end namespace
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#endif // RTPTCPSOCKETTRANSMITTER_H
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