An AudioSource that takes a PositionableAudioSource and allows it to be played, stopped, started, etc. More...

#include <juce_AudioTransportSource.h>

Inheritance diagram for juce::AudioTransportSource:

[legend]

Collaboration diagram for juce::AudioTransportSource:

[legend]

Public Member Functions
	AudioTransportSource ()
	Creates an AudioTransportSource. More...

	~AudioTransportSource () override
	Destructor. More...

void	addChangeListener (ChangeListener *listener)
	Registers a listener to receive change callbacks from this broadcaster. More...

void	dispatchPendingMessages ()
	If a change message has been sent but not yet dispatched, this will call sendSynchronousChangeMessage() to make the callback immediately. More...

double	getCurrentPosition () const
	Returns the position that the next data block will be read from This is a time in seconds. More...

float	getGain () const noexcept
	Returns the current gain setting. More...

double	getLengthInSeconds () const
	Returns the stream's length in seconds. More...

void	getNextAudioBlock (const AudioSourceChannelInfo &) override
	Implementation of the AudioSource method. More...

int64	getNextReadPosition () const override
	Implements the PositionableAudioSource method. More...

int64	getTotalLength () const override
	Implements the PositionableAudioSource method. More...

bool	hasStreamFinished () const noexcept
	Returns true if the player has stopped because its input stream ran out of data. More...

bool	isLooping () const override
	Implements the PositionableAudioSource method. More...

bool	isPlaying () const noexcept
	Returns true if it's currently playing. More...

void	prepareToPlay (int samplesPerBlockExpected, double sampleRate) override
	Implementation of the AudioSource method. More...

void	releaseResources () override
	Implementation of the AudioSource method. More...

void	removeAllChangeListeners ()
	Removes all listeners from the list. More...

void	removeChangeListener (ChangeListener *listener)
	Unregisters a listener from the list. More...

void	sendChangeMessage ()
	Causes an asynchronous change message to be sent to all the registered listeners. More...

void	sendSynchronousChangeMessage ()
	Sends a synchronous change message to all the registered listeners. More...

void	setGain (float newGain) noexcept
	Changes the gain to apply to the output. More...

virtual void	setLooping (bool shouldLoop)
	Tells the source whether you'd like it to play in a loop. More...

void	setNextReadPosition (int64 newPosition) override
	Implements the PositionableAudioSource method. More...

void	setPosition (double newPosition)
	Changes the current playback position in the source stream. More...

void	setSource (PositionableAudioSource newSource, int readAheadBufferSize=0, TimeSliceThread readAheadThread=nullptr, double sourceSampleRateToCorrectFor=0.0, int maxNumChannels=2)
	Sets the reader that is being used as the input source. More...

void	start ()
	Starts playing (if a source has been selected). More...

void	stop ()
	Stops playing. More...

Private Member Functions
void	callListeners ()

void	releaseMasterResources ()

Private Attributes
std::atomic< bool >	anyListeners { false }

int	blockSize = 128

ChangeBroadcasterCallback	broadcastCallback

BufferingAudioSource *	bufferingSource = nullptr

CriticalSection	callbackLock

ListenerList< ChangeListener >	changeListeners

float	gain = 1.0f

bool	isPrepared = false

float	lastGain = 1.0f

AudioSource *	masterSource = nullptr

std::atomic< bool >	playing { false }

PositionableAudioSource *	positionableSource = nullptr

int	readAheadBufferSize = 0

ResamplingAudioSource *	resamplerSource = nullptr

double	sampleRate = 44100.0

PositionableAudioSource *	source = nullptr

double	sourceSampleRate = 0

std::atomic< bool >	stopped { true }

Detailed Description

An AudioSource that takes a PositionableAudioSource and allows it to be played, stopped, started, etc.

This can also be told use a buffer and background thread to read ahead, and if can correct for different sample-rates.

You may want to use one of these along with an AudioSourcePlayer and AudioIODevice to control playback of an audio file.

See also: AudioSource, AudioSourcePlayer

@tags{Audio}

Constructor & Destructor Documentation

◆ AudioTransportSource()

juce::AudioTransportSource::AudioTransportSource ( )

Creates an AudioTransportSource.

After creating one of these, use the setSource() method to select an input source.

◆ ~AudioTransportSource()

juce::AudioTransportSource::~AudioTransportSource ( )

override

Destructor.

Member Function Documentation

◆ addChangeListener()

void juce::ChangeBroadcaster::addChangeListener ( ChangeListener * listener )

inherited

Registers a listener to receive change callbacks from this broadcaster.

Trying to add a listener that's already on the list will have no effect.

◆ callListeners()

void juce::ChangeBroadcaster::callListeners ( )

privateinherited

◆ dispatchPendingMessages()

void juce::ChangeBroadcaster::dispatchPendingMessages ( )

inherited

If a change message has been sent but not yet dispatched, this will call sendSynchronousChangeMessage() to make the callback immediately.

For thread-safety reasons, you must only call this method on the main message thread.

◆ getCurrentPosition()

double juce::AudioTransportSource::getCurrentPosition ( ) const

Returns the position that the next data block will be read from This is a time in seconds.

◆ getGain()

float juce::AudioTransportSource::getGain ( ) const

inlinenoexcept

Returns the current gain setting.

See also: setGain

◆ getLengthInSeconds()

double juce::AudioTransportSource::getLengthInSeconds ( ) const

Returns the stream's length in seconds.

◆ getNextAudioBlock()

void juce::AudioTransportSource::getNextAudioBlock ( const AudioSourceChannelInfo & )

overridevirtual

Implementation of the AudioSource method.

Implements juce::AudioSource.

◆ getNextReadPosition()

int64 juce::AudioTransportSource::getNextReadPosition ( ) const

overridevirtual

Implements the PositionableAudioSource method.

Implements juce::PositionableAudioSource.

◆ getTotalLength()

int64 juce::AudioTransportSource::getTotalLength ( ) const

overridevirtual

Implements the PositionableAudioSource method.

Implements juce::PositionableAudioSource.

◆ hasStreamFinished()

bool juce::AudioTransportSource::hasStreamFinished ( ) const

noexcept

Returns true if the player has stopped because its input stream ran out of data.

◆ isLooping()

bool juce::AudioTransportSource::isLooping ( ) const

overridevirtual

Implements the PositionableAudioSource method.

Implements juce::PositionableAudioSource.

◆ isPlaying()

bool juce::AudioTransportSource::isPlaying ( ) const

inlinenoexcept

Returns true if it's currently playing.

◆ prepareToPlay()

void juce::AudioTransportSource::prepareToPlay	(	int	samplesPerBlockExpected,
		double	sampleRate
	)

overridevirtual

Implementation of the AudioSource method.

Implements juce::AudioSource.

◆ releaseMasterResources()

void juce::AudioTransportSource::releaseMasterResources ( )

private

◆ releaseResources()

void juce::AudioTransportSource::releaseResources ( )

overridevirtual

Implementation of the AudioSource method.

Implements juce::AudioSource.

◆ removeAllChangeListeners()

void juce::ChangeBroadcaster::removeAllChangeListeners ( )

inherited

Removes all listeners from the list.

◆ removeChangeListener()

void juce::ChangeBroadcaster::removeChangeListener ( ChangeListener * listener )

inherited

Unregisters a listener from the list.

If the listener isn't on the list, this won't have any effect.

◆ sendChangeMessage()

void juce::ChangeBroadcaster::sendChangeMessage ( )

inherited

Causes an asynchronous change message to be sent to all the registered listeners.

The message will be delivered asynchronously by the main message thread, so this method will return immediately. To call the listeners synchronously use sendSynchronousChangeMessage().

Referenced by juce::SelectedItemSet< SelectableItemType >::changed().

◆ sendSynchronousChangeMessage()

void juce::ChangeBroadcaster::sendSynchronousChangeMessage ( )

inherited

Sends a synchronous change message to all the registered listeners.

This will immediately call all the listeners that are registered. For thread-safety reasons, you must only call this method on the main message thread.

See also: dispatchPendingMessages

Referenced by juce::SelectedItemSet< SelectableItemType >::changed().

◆ setGain()

void juce::AudioTransportSource::setGain ( float newGain )

noexcept

Changes the gain to apply to the output.

Parameters

newGain a factor by which to multiply the outgoing samples, so 1.0 = 0dB, 0.5 = -6dB, 2.0 = 6dB, etc.

◆ setLooping()

virtual void juce::PositionableAudioSource::setLooping ( bool shouldLoop )

inlinevirtualinherited

Tells the source whether you'd like it to play in a loop.

Reimplemented in juce::MemoryAudioSource, and juce::AudioFormatReaderSource.

References juce::ignoreUnused().

◆ setNextReadPosition()

void juce::AudioTransportSource::setNextReadPosition ( int64 newPosition )

overridevirtual

Implements the PositionableAudioSource method.

Implements juce::PositionableAudioSource.

◆ setPosition()

void juce::AudioTransportSource::setPosition ( double newPosition )

Changes the current playback position in the source stream.

The next time the getNextAudioBlock() method is called, this is the time from which it'll read data.

Parameters

newPosition the new playback position in seconds

See also: getCurrentPosition

◆ setSource()

void juce::AudioTransportSource::setSource	(	PositionableAudioSource *	newSource,
		int	readAheadBufferSize = `0`,
		TimeSliceThread *	readAheadThread = `nullptr`,
		double	sourceSampleRateToCorrectFor = `0.0`,
		int	maxNumChannels = `2`
	)

Sets the reader that is being used as the input source.

This will stop playback, reset the position to 0 and change to the new reader.

The source passed in will not be deleted by this object, so must be managed by the caller.

Parameters

newSource	the new input source to use. This may be a nullptr
readAheadBufferSize	a size of buffer to use for reading ahead. If this is zero, no reading ahead will be done; if it's greater than zero, a BufferingAudioSource will be used to do the reading-ahead. If you set a non-zero value here, you'll also need to set the readAheadThread parameter.
readAheadThread	if you set readAheadBufferSize to a non-zero value, then you'll also need to supply this TimeSliceThread object for the background reader to use. The thread object must not be deleted while the AudioTransport source is still using it.
sourceSampleRateToCorrectFor	if this is non-zero, it specifies the sample rate of the source, and playback will be sample-rate adjusted to maintain playback at the correct pitch. If this is 0, no sample-rate adjustment will be performed
maxNumChannels	the maximum number of channels that may need to be played

◆ start()

void juce::AudioTransportSource::start ( )

Starts playing (if a source has been selected).

If it starts playing, this will send a message to any ChangeListeners that are registered with this object.

◆ stop()

void juce::AudioTransportSource::stop ( )

Stops playing.

If it's actually playing, this will send a message to any ChangeListeners that are registered with this object.

Member Data Documentation

◆ anyListeners

std::atomic<bool> juce::ChangeBroadcaster::anyListeners { false }

privateinherited

◆ blockSize

int juce::AudioTransportSource::blockSize = 128

private

◆ broadcastCallback

ChangeBroadcasterCallback juce::ChangeBroadcaster::broadcastCallback

privateinherited

◆ bufferingSource

BufferingAudioSource* juce::AudioTransportSource::bufferingSource = nullptr

private

◆ callbackLock

CriticalSection juce::AudioTransportSource::callbackLock

private

◆ changeListeners

ListenerList<ChangeListener> juce::ChangeBroadcaster::changeListeners

privateinherited

◆ gain

float juce::AudioTransportSource::gain = 1.0f

private

◆ isPrepared

bool juce::AudioTransportSource::isPrepared = false

private

◆ lastGain

float juce::AudioTransportSource::lastGain = 1.0f

private

◆ masterSource

AudioSource* juce::AudioTransportSource::masterSource = nullptr

private

◆ playing

std::atomic<bool> juce::AudioTransportSource::playing { false }

private

◆ positionableSource

PositionableAudioSource* juce::AudioTransportSource::positionableSource = nullptr

private

◆ readAheadBufferSize

int juce::AudioTransportSource::readAheadBufferSize = 0

private

◆ resamplerSource

ResamplingAudioSource* juce::AudioTransportSource::resamplerSource = nullptr

private

◆ sampleRate

double juce::AudioTransportSource::sampleRate = 44100.0

private

◆ source

PositionableAudioSource* juce::AudioTransportSource::source = nullptr

private

◆ sourceSampleRate

double juce::AudioTransportSource::sourceSampleRate = 0

private

◆ stopped

std::atomic<bool> juce::AudioTransportSource::stopped { true }

private

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

juce_AudioTransportSource.h

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ AudioTransportSource()

◆ ~AudioTransportSource()

Member Function Documentation

◆ addChangeListener()

◆ callListeners()

◆ dispatchPendingMessages()

◆ getCurrentPosition()

◆ getGain()

◆ getLengthInSeconds()

◆ getNextAudioBlock()

◆ getNextReadPosition()

◆ getTotalLength()

◆ hasStreamFinished()

◆ isLooping()

◆ isPlaying()

◆ prepareToPlay()

◆ releaseMasterResources()

◆ releaseResources()

◆ removeAllChangeListeners()

◆ removeChangeListener()

◆ sendChangeMessage()

◆ sendSynchronousChangeMessage()

◆ setGain()

◆ setLooping()

◆ setNextReadPosition()

◆ setPosition()

◆ setSource()

◆ start()

◆ stop()

Member Data Documentation

◆ anyListeners

◆ blockSize

◆ broadcastCallback

◆ bufferingSource

◆ callbackLock

◆ changeListeners

◆ gain

◆ isPrepared

◆ lastGain

◆ masterSource

◆ playing

◆ positionableSource

◆ readAheadBufferSize

◆ resamplerSource

◆ sampleRate

◆ source

◆ sourceSampleRate

◆ stopped