org.jitsi.impl.neomedia.recording

Class SynchronizerImpl

java.lang.Object

org.jitsi.impl.neomedia.recording.SynchronizerImpl

All Implemented Interfaces:

Synchronizer

public class SynchronizerImpl
extends Object
implements Synchronizer

Author:

Boris Grozev

Constructor Summary

Constructors

Constructor and Description
SynchronizerImpl()

Method Summary

Modifier and Type	Method and Description
long	getLocalTime(long ssrc, long rtp0) Tries to find the local time (as returned by System.currentTimeMillis()) that corresponds to the RTP timestamp rtpTime for the SSRC ssrc.
void	mapLocalToNtp(long ssrc, long localTime, double ntpTime) Notifies this Synchronizer that the local timestamp localTime corresponds to the NTP timestamp ntpTime (for SSRC ssrc).
void	mapRtpToNtp(long ssrc, long rtpTime, double ntpTime) Notifies this Synchronizer that the RTP timestamp rtpTime (for SSRC ssrc) corresponds to the NTP timestamp ntpTime.
long	readUnsignedIntAsLong(byte[] buf, int off) Read an unsigned integer as long at specified offset
void	setEndpoint(long ssrc, String endpointId) Sets the endpoint identifier for a specific SSRC.
void	setRtpClockRate(long ssrc, long clockRate) Sets the clock rate of the RTP clock for a specific SSRC.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SynchronizerImpl

public SynchronizerImpl()

Method Detail

setRtpClockRate

public void setRtpClockRate(long ssrc,
                            long clockRate)

Sets the clock rate of the RTP clock for a specific SSRC.

Specified by:

setRtpClockRate in interface Synchronizer

Parameters:

ssrc - the SSRC for which to set the RTP clock rate.

clockRate - the clock rate.

setEndpoint

public void setEndpoint(long ssrc,
                        String endpointId)

Sets the endpoint identifier for a specific SSRC.

Specified by:

setEndpoint in interface Synchronizer

Parameters:

ssrc - the SSRC for which to set the endpoint identifier.

endpointId - the endpoint identifier to set.

mapRtpToNtp

public void mapRtpToNtp(long ssrc,
                        long rtpTime,
                        double ntpTime)

Notifies this Synchronizer that the RTP timestamp rtpTime (for SSRC ssrc) corresponds to the NTP timestamp ntpTime.

Specified by:

mapRtpToNtp in interface Synchronizer

Parameters:

ssrc - the SSRC.

rtpTime - the RTP timestamp which corresponds to ntpTime.

ntpTime - the NTP timestamp which corresponds to rtpTime.

mapLocalToNtp

public void mapLocalToNtp(long ssrc,
                          long localTime,
                          double ntpTime)

Notifies this Synchronizer that the local timestamp localTime corresponds to the NTP timestamp ntpTime (for SSRC ssrc).

Specified by:

mapLocalToNtp in interface Synchronizer

Parameters:

ssrc - the SSRC.

localTime - the local timestamp which corresponds to ntpTime.

ntpTime - the NTP timestamp which corresponds to localTime.

getLocalTime

public long getLocalTime(long ssrc,
                         long rtp0)

Tries to find the local time (as returned by System.currentTimeMillis()) that corresponds to the RTP timestamp rtpTime for the SSRC ssrc. Returns -1 if the local time cannot be found (for example because not enough information for the SSRC has been previously provided to the Synchronizer).

Specified by:

getLocalTime in interface Synchronizer

Parameters:

ssrc - the SSRC with which rtpTime is associated.

rtp0 - the RTP timestamp

Returns:

the local time corresponding to rtpTime for SSRC ssrc if it can be calculated, and -1 otherwise.

readUnsignedIntAsLong

public long readUnsignedIntAsLong(byte[] buf,
                                  int off)

Read an unsigned integer as long at specified offset

Parameters:

off - start offset of this unsigned integer

Returns:

unsigned integer as long at offset