Describes the time at the start of the current audio callback. More...

#include <juce_AudioPlayHead.h>

Public Member Functions
Optional< int64_t >	getTimeInSamples () const
	Returns the number of samples that have elapsed.

void	setTimeInSamples (Optional< int64_t > timeInSamplesIn)

Optional< double >	getTimeInSeconds () const
	Returns the number of seconds that have elapsed.

void	setTimeInSeconds (Optional< double > timeInSecondsIn)

Optional< double >	getBpm () const
	Returns the bpm, if available.

void	setBpm (Optional< double > bpmIn)

Optional< TimeSignature >	getTimeSignature () const
	Returns the time signature, if available.

void	setTimeSignature (Optional< TimeSignature > timeSignatureIn)

Optional< LoopPoints >	getLoopPoints () const
	Returns host loop points, if available.

void	setLoopPoints (Optional< LoopPoints > loopPointsIn)

Optional< int64_t >	getBarCount () const
	The number of bars since the beginning of the timeline.

void	setBarCount (Optional< int64_t > barCountIn)

Optional< double >	getPpqPositionOfLastBarStart () const
	The position of the start of the last bar, in units of quarter-notes.

void	setPpqPositionOfLastBarStart (Optional< double > positionIn)

Optional< FrameRate >	getFrameRate () const
	The video frame rate, if available.

void	setFrameRate (Optional< FrameRate > frameRateIn)

Optional< double >	getPpqPosition () const
	The current play position, in units of quarter-notes.

void	setPpqPosition (Optional< double > ppqPositionIn)

Optional< double >	getEditOriginTime () const
	For timecode, the position of the start of the timeline, in seconds from 00:00:00:00.

void	setEditOriginTime (Optional< double > editOriginTimeIn)

Optional< uint64_t >	getHostTimeNs () const
	Get the host's callback time in nanoseconds, if available.

void	setHostTimeNs (Optional< uint64_t > hostTimeNsIn)

bool	getIsPlaying () const
	True if the transport is currently playing.

void	setIsPlaying (bool isPlayingIn)

bool	getIsRecording () const
	True if the transport is currently recording.

void	setIsRecording (bool isRecordingIn)

bool	getIsLooping () const
	True if the transport is currently looping.

void	setIsLooping (bool isLoopingIn)

bool	operator== (const PositionInfo &other) const noexcept

bool	operator!= (const PositionInfo &other) const noexcept

Detailed Description

Describes the time at the start of the current audio callback.

Not all hosts and plugin formats can provide all of the possible time information, so most of the getter functions in this class return an Optional that will only be engaged if the host provides the corresponding information. As a plugin developer, you should code defensively so that the plugin behaves sensibly even when the host fails to provide timing information.

A default-constructed instance of this class will return nullopt from all functions that return an Optional.

Member Function Documentation

◆ getTimeInSamples()

Optional< int64_t > AudioPlayHead::PositionInfo::getTimeInSamples ( ) const

Returns the number of samples that have elapsed.

◆ setTimeInSamples()

void AudioPlayHead::PositionInfo::setTimeInSamples ( Optional< int64_t > timeInSamplesIn )

See also: getTimeInSamples()

◆ getTimeInSeconds()

Optional< double > AudioPlayHead::PositionInfo::getTimeInSeconds ( ) const

Returns the number of seconds that have elapsed.

◆ setTimeInSeconds()

void AudioPlayHead::PositionInfo::setTimeInSeconds ( Optional< double > timeInSecondsIn )

See also: getTimeInSamples()

◆ getBpm()

Optional< double > AudioPlayHead::PositionInfo::getBpm ( ) const

Returns the bpm, if available.

◆ setBpm()

void AudioPlayHead::PositionInfo::setBpm ( Optional< double > bpmIn )

See also: getBpm()

◆ getTimeSignature()

Optional< TimeSignature > AudioPlayHead::PositionInfo::getTimeSignature ( ) const

Returns the time signature, if available.

◆ setTimeSignature()

void AudioPlayHead::PositionInfo::setTimeSignature ( Optional< TimeSignature > timeSignatureIn )

See also: getTimeSignature()

◆ getLoopPoints()

Optional< LoopPoints > AudioPlayHead::PositionInfo::getLoopPoints ( ) const

Returns host loop points, if available.

◆ setLoopPoints()

void AudioPlayHead::PositionInfo::setLoopPoints ( Optional< LoopPoints > loopPointsIn )

See also: getLoopPoints()

◆ getBarCount()

Optional< int64_t > AudioPlayHead::PositionInfo::getBarCount ( ) const

The number of bars since the beginning of the timeline.

This value isn't available in all hosts or in all plugin formats.

◆ setBarCount()

void AudioPlayHead::PositionInfo::setBarCount ( Optional< int64_t > barCountIn )

See also: getBarCount()

◆ getPpqPositionOfLastBarStart()

Optional< double > AudioPlayHead::PositionInfo::getPpqPositionOfLastBarStart ( ) const

The position of the start of the last bar, in units of quarter-notes.

This is the time from the start of the timeline to the start of the current bar, in ppq units.

Note - this value may be unavailable on some hosts, e.g. Pro-Tools.

◆ setPpqPositionOfLastBarStart()

void AudioPlayHead::PositionInfo::setPpqPositionOfLastBarStart ( Optional< double > positionIn )

See also: getPpqPositionOfLastBarStart()

◆ getFrameRate()

Optional< FrameRate > AudioPlayHead::PositionInfo::getFrameRate ( ) const

The video frame rate, if available.

◆ setFrameRate()

void AudioPlayHead::PositionInfo::setFrameRate ( Optional< FrameRate > frameRateIn )

See also: getFrameRate()

◆ getPpqPosition()

Optional< double > AudioPlayHead::PositionInfo::getPpqPosition ( ) const

The current play position, in units of quarter-notes.

◆ setPpqPosition()

void AudioPlayHead::PositionInfo::setPpqPosition ( Optional< double > ppqPositionIn )

See also: getPpqPosition()

◆ getEditOriginTime()

Optional< double > AudioPlayHead::PositionInfo::getEditOriginTime ( ) const

For timecode, the position of the start of the timeline, in seconds from 00:00:00:00.

◆ setEditOriginTime()

void AudioPlayHead::PositionInfo::setEditOriginTime ( Optional< double > editOriginTimeIn )

See also: getEditOriginTime()

◆ getHostTimeNs()

Optional< uint64_t > AudioPlayHead::PositionInfo::getHostTimeNs ( ) const

Get the host's callback time in nanoseconds, if available.

◆ setHostTimeNs()

void AudioPlayHead::PositionInfo::setHostTimeNs ( Optional< uint64_t > hostTimeNsIn )

See also: getHostTimeNs()

◆ getIsPlaying()

bool AudioPlayHead::PositionInfo::getIsPlaying ( ) const

True if the transport is currently playing.

◆ setIsPlaying()

void AudioPlayHead::PositionInfo::setIsPlaying ( bool isPlayingIn )

See also: getIsPlaying()

◆ getIsRecording()

bool AudioPlayHead::PositionInfo::getIsRecording ( ) const

True if the transport is currently recording.

(When isRecording is true, then isPlaying will also be true).

◆ setIsRecording()

void AudioPlayHead::PositionInfo::setIsRecording ( bool isRecordingIn )

See also: getIsRecording()

◆ getIsLooping()

bool AudioPlayHead::PositionInfo::getIsLooping ( ) const

True if the transport is currently looping.

◆ setIsLooping()

void AudioPlayHead::PositionInfo::setIsLooping ( bool isLoopingIn )

See also: getIsLooping()

◆ operator==()

bool AudioPlayHead::PositionInfo::operator== ( const PositionInfo & other ) const

noexcept

◆ operator!=()

bool AudioPlayHead::PositionInfo::operator!= ( const PositionInfo & other ) const