mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-08-26 15:56:35 -04:00
226 lines
7.5 KiB
C++
226 lines
7.5 KiB
C++
/*
|
|
|
|
This file is a part of JRTPLIB
|
|
Copyright (c) 1999-2017 Jori Liesenborgs
|
|
|
|
Contact: jori.liesenborgs@gmail.com
|
|
|
|
This library was developed at the Expertise Centre for Digital Media
|
|
(http://www.edm.uhasselt.be), a research center of the Hasselt University
|
|
(http://www.uhasselt.be). The library is based upon work done for
|
|
my thesis at the School for Knowledge Technology (Belgium/The Netherlands).
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a
|
|
copy of this software and associated documentation files (the "Software"),
|
|
to deal in the Software without restriction, including without limitation
|
|
the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
and/or sell copies of the Software, and to permit persons to whom the
|
|
Software is furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included
|
|
in all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
IN THE SOFTWARE.
|
|
|
|
*/
|
|
|
|
/**
|
|
* \file rtcpscheduler.h
|
|
*/
|
|
|
|
#ifndef RTCPSCHEDULER_H
|
|
|
|
#define RTCPSCHEDULER_H
|
|
|
|
#include "rtpconfig.h"
|
|
#include "rtptimeutilities.h"
|
|
#include "rtprandom.h"
|
|
#include <cstddef>
|
|
|
|
#include "export.h"
|
|
|
|
namespace qrtplib
|
|
{
|
|
|
|
class RTCPCompoundPacket;
|
|
class RTPPacket;
|
|
class RTPSources;
|
|
|
|
/** Describes parameters used by the RTCPScheduler class. */
|
|
class QRTPLIB_API RTCPSchedulerParams
|
|
{
|
|
public:
|
|
RTCPSchedulerParams();
|
|
~RTCPSchedulerParams();
|
|
|
|
/** Sets the RTCP bandwidth to be used to \c bw (in bytes per second). */
|
|
int SetRTCPBandwidth(double bw);
|
|
|
|
/** Returns the used RTCP bandwidth in bytes per second (default is 1000). */
|
|
double GetRTCPBandwidth() const
|
|
{
|
|
return bandwidth;
|
|
}
|
|
|
|
/** Sets the fraction of the RTCP bandwidth reserved for senders to \c fraction. */
|
|
int SetSenderBandwidthFraction(double fraction);
|
|
|
|
/** Returns the fraction of the RTCP bandwidth reserved for senders (default is 25%). */
|
|
double GetSenderBandwidthFraction() const
|
|
{
|
|
return senderfraction;
|
|
}
|
|
|
|
/** Sets the minimum (deterministic) interval between RTCP compound packets to \c t. */
|
|
int SetMinimumTransmissionInterval(const RTPTime &t);
|
|
|
|
/** Returns the minimum RTCP transmission interval (default is 5 seconds). */
|
|
RTPTime GetMinimumTransmissionInterval() const
|
|
{
|
|
return mininterval;
|
|
}
|
|
|
|
/** If \c usehalf is \c true, only use half the minimum interval before sending the first RTCP compound packet. */
|
|
void SetUseHalfAtStartup(bool usehalf)
|
|
{
|
|
usehalfatstartup = usehalf;
|
|
}
|
|
|
|
/** Returns \c true if only half the minimum interval should be used before sending the first RTCP compound packet
|
|
* (defualt is \c true).
|
|
*/
|
|
bool GetUseHalfAtStartup() const
|
|
{
|
|
return usehalfatstartup;
|
|
}
|
|
|
|
/** If \c v is \c true, the scheduler will schedule a BYE packet to be sent immediately if allowed. */
|
|
void SetRequestImmediateBYE(bool v)
|
|
{
|
|
immediatebye = v;
|
|
}
|
|
|
|
/** Returns if the scheduler will schedule a BYE packet to be sent immediately if allowed
|
|
* (default is \c true).
|
|
*/
|
|
bool GetRequestImmediateBYE() const
|
|
{
|
|
return immediatebye;
|
|
}
|
|
private:
|
|
double bandwidth;
|
|
double senderfraction;
|
|
RTPTime mininterval;
|
|
bool usehalfatstartup;
|
|
bool immediatebye;
|
|
};
|
|
|
|
/** This class determines when RTCP compound packets should be sent. */
|
|
class RTCPScheduler
|
|
{
|
|
public:
|
|
/** Creates an instance which will use the source table RTPSources to determine when RTCP compound
|
|
* packets should be scheduled.
|
|
* Creates an instance which will use the source table RTPSources to determine when RTCP compound
|
|
* packets should be scheduled. Note that for correct operation the \c sources instance should have information
|
|
* about the own SSRC (added by RTPSources::CreateOwnSSRC). You must also supply a random number
|
|
* generator \c rtprand which will be used for adding randomness to the RTCP intervals.
|
|
*/
|
|
RTCPScheduler(RTPSources &sources, RTPRandom &rtprand);
|
|
~RTCPScheduler();
|
|
|
|
/** Resets the scheduler. */
|
|
void Reset();
|
|
|
|
/** Sets the scheduler parameters to be used to \c params. */
|
|
void SetParameters(const RTCPSchedulerParams ¶ms)
|
|
{
|
|
schedparams = params;
|
|
}
|
|
|
|
/** Returns the currently used scheduler parameters. */
|
|
RTCPSchedulerParams GetParameters() const
|
|
{
|
|
return schedparams;
|
|
}
|
|
|
|
/** Sets the header overhead from underlying protocols (for example UDP and IP) to \c numbytes. */
|
|
void SetHeaderOverhead(std::size_t numbytes)
|
|
{
|
|
headeroverhead = numbytes;
|
|
}
|
|
|
|
/** Returns the currently used header overhead. */
|
|
std::size_t GetHeaderOverhead() const
|
|
{
|
|
return headeroverhead;
|
|
}
|
|
|
|
/** For each incoming RTCP compound packet, this function has to be called for the scheduler to work correctly. */
|
|
void AnalyseIncoming(RTCPCompoundPacket &rtcpcomppack);
|
|
|
|
/** For each outgoing RTCP compound packet, this function has to be called for the scheduler to work correctly. */
|
|
void AnalyseOutgoing(RTCPCompoundPacket &rtcpcomppack);
|
|
|
|
/** This function has to be called each time a member times out or sends a BYE packet. */
|
|
void ActiveMemberDecrease();
|
|
|
|
/** Asks the scheduler to schedule an RTCP compound packet containing a BYE packetl; the compound packet
|
|
* has size \c packetsize.
|
|
*/
|
|
void ScheduleBYEPacket(std::size_t packetsize);
|
|
|
|
/** Returns the delay after which an RTCP compound will possibly have to be sent.
|
|
* Returns the delay after which an RTCP compound will possibly have to be sent. The IsTime member function
|
|
* should be called afterwards to make sure that it actually is time to send an RTCP compound packet.
|
|
*/
|
|
RTPTime GetTransmissionDelay();
|
|
|
|
/** This function returns \c true if it's time to send an RTCP compound packet and \c false otherwise.
|
|
* This function returns \c true if it's time to send an RTCP compound packet and \c false otherwise.
|
|
* If the function returns \c true, it will also have calculated the next time at which a packet should
|
|
* be sent, so if it is called again right away, it will return \c false.
|
|
*/
|
|
bool IsTime();
|
|
|
|
/** Calculates the deterministic interval at this time.
|
|
* Calculates the deterministic interval at this time. This is used - in combination with a certain multiplier -
|
|
* to time out members, senders etc.
|
|
*/
|
|
RTPTime CalculateDeterministicInterval(bool sender = false);
|
|
private:
|
|
void CalculateNextRTCPTime();
|
|
void PerformReverseReconsideration();
|
|
RTPTime CalculateBYETransmissionInterval();
|
|
RTPTime CalculateTransmissionInterval(bool sender);
|
|
|
|
RTPSources &sources;
|
|
RTCPSchedulerParams schedparams;
|
|
std::size_t headeroverhead;
|
|
std::size_t avgrtcppacksize;
|
|
bool hassentrtcp;
|
|
bool firstcall;
|
|
RTPTime nextrtcptime;
|
|
RTPTime prevrtcptime;
|
|
int pmembers;
|
|
|
|
// for BYE packet scheduling
|
|
bool byescheduled;
|
|
int byemembers, pbyemembers;
|
|
std::size_t avgbyepacketsize;
|
|
bool sendbyenow;
|
|
|
|
RTPRandom &rtprand;
|
|
};
|
|
|
|
} // end namespace
|
|
|
|
#endif // RTCPSCHEDULER_H
|
|
|