ts::TSClock Class Reference

Compute a clock, based real time, TS time, PCR or input timestamps. More...

#include <tsTSClock.h>

Inheritance diagram for ts::TSClock:

Collaboration diagram for ts::TSClock:

Public Member Functions
	TSClock (DuckContext &duck, int severity=Severity::Verbose)
	Constructor.
Time	clock () const
	Get the current clock, in UTC or local time, depending on TSClockArgs.
Time	clockUTC () const
	Get the current clock in UTC time.
cn::milliseconds	durationMS () const
	Get the estimated playout duration since first packets in milliseconds.
PCR	durationPCR () const
	Get the estimated playout duration since first packets in PCR units.
void	feedPacket (const TSPacket &pkt, const TSPacketMetadata &mdata)
	The following method feeds the analyzer with a TS packet.
Time	initialClock () const
	Get the clock of the first packet, in UTC or local time, depending on TSClockArgs.
Time	initialClockUTC () const
	Get the clock in UTC time of the first packet.
bool	isValid () const
	Check if the clock is valid.
void	reset (const TSClockArgs &args)
	Reset all collected information.

Detailed Description

Compute a clock, based real time, TS time, PCR or input timestamps.

Depending on parameters, the clock can be:

• Real time (system clock)
• Time from the first TDT, TOT ot ATSC STT.
• Explicit start time from parameters. The progression of the clock is based on TS packets in the last two cases. By default, the clock is based on real UTC time and TS packets are unused.

Constructor & Destructor Documentation

TSClock()

ts::TSClock::TSClock	(	DuckContext &	duck,
		int	severity = Severity::Verbose
	)

Constructor.

Parameters

[in,out]	duck	TSDuck execution context. A reference is kept inside this object.
[in]	severity	Severity of the messages when switching sources.

Member Function Documentation

reset()

void ts::TSClock::reset

(

const TSClockArgs &

args

)

Reset all collected information.

Parameters

[in]

args

Clock parameters.

feedPacket()

void ts::TSClock::feedPacket	(	const TSPacket &	pkt,
		const TSPacketMetadata &	mdata
	)

The following method feeds the analyzer with a TS packet.

Parameters

[in]	pkt	A new transport stream packet.
[in]	mdata	Associated metadata, including the input timestamp.

isValid()

bool ts::TSClock::isValid ( ) const

inline

Check if the clock is valid.

The clock is invalid when based on the TS clock, before the first TDT, TOT or STT.

Returns

True if the clock is valid, false otherwise.

initialClockUTC()

Time ts::TSClock::initialClockUTC ( ) const

inline

Get the clock in UTC time of the first packet.

Returns

The clock of the first packet in UTC time or Time::Epoch if the clock is not yet valid.

initialClock()

Time ts::TSClock::initialClock

(

)

const

Get the clock of the first packet, in UTC or local time, depending on TSClockArgs.

Returns

The clock of the first packet or Time::Epoch if the clock is not yet valid.

clockUTC()

Time ts::TSClock::clockUTC

(

)

const

Get the current clock in UTC time.

Returns

The computed clock in UTC or Time::Epoch if the clock is not yet valid.

clock()

Time ts::TSClock::clock

(

)

const

Get the current clock, in UTC or local time, depending on TSClockArgs.

Returns

The computed clock or Time::Epoch if the clock is not yet valid.

durationMS()

cn::milliseconds ts::TSClock::durationMS

(

)

const

Get the estimated playout duration since first packets in milliseconds.

The returned duration depends on the TSClockArgs. If real time is used, this is the number of actual milliseconds since the first packet. Otherwise, this is the same as durationPCR(), converted in milliseconds.

Returns

The estimated playout duration in milliseconds.

durationPCR()

PCR ts::TSClock::durationPCR ( ) const

inline

Get the estimated playout duration since first packets in PCR units.

The returned duration is always based on the timestamps from the stream, never on real time.

Returns

The estimated playout duration in PCR units.

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The documentation for this class was generated from the following file:

• tsTSClock.h