/usr/include/ns3/delay-jitter-estimation.h is in libns3-dev 3.13+dfsg-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | #ifndef DELAY_JITTER_ESTIMATION_H
#define DELAY_JITTER_ESTIMATION_H
#include "ns3/nstime.h"
#include "ns3/packet.h"
namespace ns3 {
/**
* \ingroup tools
*
* \brief quick and dirty delay and jitter estimation
*
*/
class DelayJitterEstimation
{
public:
DelayJitterEstimation ();
/**
* \param packet the packet to send over a wire
*
* This method should be invoked once on each packet to
* record within the packet the tx time which is used upon
* packet reception to calculate the delay and jitter. The
* tx time is stored in the packet as an ns3::Tag which means
* that it does not use any network resources and is not
* taken into account in transmission delay calculations.
*/
static void PrepareTx (Ptr<const Packet> packet);
/**
* \param packet the packet received
*
* Invoke this method to update the delay and jitter calculations
* After a call to this method, \ref GetLastDelay and \ref GetLastJitter
* will return an updated delay and jitter.
*/
void RecordRx (Ptr<const Packet> packet);
/**
* \returns the updated delay.
*/
Time GetLastDelay (void) const;
/**
* The jitter is calculated using the RFC 1889 (RTP) jitter
* definition.
*
* \returns the updated jitter.
*/
uint64_t GetLastJitter (void) const;
private:
Time m_previousRx;
Time m_previousRxTx;
int64x64_t m_jitter;
Time m_delay;
};
} // namespace ns3
#endif /* DELAY_JITTER_ESTIMATION_H */
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