A type of AudioFormatReader that reads from an audio CD. More...

Inheritance diagram for AudioCDReader:

Public Types
enum	{ framesPerSecond = 75, samplesPerFrame = 44100 / framesPerSecond }

Public Member Functions
	~AudioCDReader () override
	Destructor. More...

bool	readSamples (int **destSamples, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int numSamples) override
	Implementation of the AudioFormatReader method. More...

bool	isCDStillPresent () const
	Checks whether the CD has been removed from the drive. More...

int	getNumTracks () const
	Returns the total number of tracks (audio + data). More...

int	getPositionOfTrackStart (int trackNum) const
	Finds the sample offset of the start of a track. More...

bool	isTrackAudio (int trackNum) const
	Returns true if a given track is an audio track. More...

const Array< int > &	getTrackOffsets () const
	Returns an array of sample offsets for the start of each track, followed by the sample position of the end of the CD. More...

void	refreshTrackLengths ()
	Refreshes the object's table of contents. More...

void	enableIndexScanning (bool enabled)
	Enables scanning for indexes within tracks. More...

int	getLastIndex () const
	Returns the index number found during the last read() call. More...

Array< int >	findIndexesInTrack (const int trackNumber)
	Scans a track to find the position of any indexes within it. More...

int	getCDDBId ()
	Returns the CDDB id number for the CD. More...

void	ejectDisk ()
	Tries to eject the disk. More...

Public Member Functions inherited from AudioFormatReader
virtual	~AudioFormatReader ()
	Destructor. More...

const String &	getFormatName () const noexcept
	Returns a description of what type of format this is. More...

bool	read (float const destChannels, int numDestChannels, int64 startSampleInSource, int numSamplesToRead)
	Reads samples from the stream. More...

bool	read (int const destChannels, int numDestChannels, int64 startSampleInSource, int numSamplesToRead, bool fillLeftoverChannelsWithCopies)
	Reads samples from the stream. More...

void	read (AudioBuffer< float > *buffer, int startSampleInDestBuffer, int numSamples, int64 readerStartSample, bool useReaderLeftChan, bool useReaderRightChan)
	Fills a section of an AudioBuffer from this reader. More...

virtual void	readMaxLevels (int64 startSample, int64 numSamples, Range< float > *results, int numChannelsToRead)
	Finds the highest and lowest sample levels from a section of the audio stream. More...

virtual void	readMaxLevels (int64 startSample, int64 numSamples, float &lowestLeft, float &highestLeft, float &lowestRight, float &highestRight)
	Finds the highest and lowest sample levels from a section of the audio stream. More...

int64	searchForLevel (int64 startSample, int64 numSamplesToSearch, double magnitudeRangeMinimum, double magnitudeRangeMaximum, int minimumConsecutiveSamples)
	Scans the source looking for a sample whose magnitude is in a specified range. More...

virtual AudioChannelSet	getChannelLayout ()
	Get the channel layout of the audio stream. More...

Static Public Member Functions
static StringArray	getAvailableCDNames ()
	Returns a list of names of Audio CDs currently available for reading. More...

static AudioCDReader *	createReaderForCD (const int index)
	Tries to create an AudioFormatReader that can read from an Audio CD. More...

Additional Inherited Members
Public Attributes inherited from AudioFormatReader
double	sampleRate = 0
	The sample-rate of the stream. More...

unsigned int	bitsPerSample = 0
	The number of bits per sample, e.g. More...

int64	lengthInSamples = 0
	The total number of samples in the audio stream. More...

unsigned int	numChannels = 0
	The total number of channels in the audio stream. More...

bool	usesFloatingPointData = false
	Indicates whether the data is floating-point or fixed. More...

StringPairArray	metadataValues
	A set of metadata values that the reader has pulled out of the stream. More...

InputStream *	input
	The input stream, for use by subclasses. More...

Protected Member Functions inherited from AudioFormatReader
	AudioFormatReader (InputStream *sourceStream, const String &formatName)
	Creates an AudioFormatReader object. More...

Static Protected Member Functions inherited from AudioFormatReader
static void	clearSamplesBeyondAvailableLength (int **destChannels, int numDestChannels, int startOffsetInDestBuffer, int64 startSampleInFile, int &numSamples, int64 fileLengthInSamples)
	Used by AudioFormatReader subclasses to clear any parts of the data blocks that lie beyond the end of their available length. More...

Detailed Description

A type of AudioFormatReader that reads from an audio CD.

One of these can be used to read a CD as if it's one big audio stream. Use the getPositionOfTrackStart() method to find where the individual tracks are within the stream.

See also: AudioFormatReader

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Enumerator
framesPerSecond
samplesPerFrame

Constructor & Destructor Documentation

◆ ~AudioCDReader()

AudioCDReader::~AudioCDReader ( )

override

Destructor.

Member Function Documentation

◆ getAvailableCDNames()

static StringArray AudioCDReader::getAvailableCDNames ( )

static

Returns a list of names of Audio CDs currently available for reading.

If there's a CD drive but no CD in it, this might return an empty list, or possibly a device that can be opened but which has no tracks, depending on the platform.

See also: createReaderForCD

◆ createReaderForCD()

static AudioCDReader* AudioCDReader::createReaderForCD ( const int index )

static

Tries to create an AudioFormatReader that can read from an Audio CD.

Parameters

index the index of one of the available CDs - use getAvailableCDNames() to find out how many there are.

Returns: a new AudioCDReader object, or nullptr if it couldn't be created. The caller will be responsible for deleting the object returned.

◆ readSamples()

bool AudioCDReader::readSamples	(	int **	destSamples,
		int	numDestChannels,
		int	startOffsetInDestBuffer,
		int64	startSampleInFile,
		int	numSamples
	)

overridevirtual

Implementation of the AudioFormatReader method.

Implements AudioFormatReader.

◆ isCDStillPresent()

bool AudioCDReader::isCDStillPresent ( ) const

Checks whether the CD has been removed from the drive.

◆ getNumTracks()

int AudioCDReader::getNumTracks ( ) const

Returns the total number of tracks (audio + data).

◆ getPositionOfTrackStart()

int AudioCDReader::getPositionOfTrackStart ( int trackNum ) const

Finds the sample offset of the start of a track.

Parameters

trackNum the track number, where trackNum = 0 is the first track and trackNum = getNumTracks() means the end of the CD.

◆ isTrackAudio()

bool AudioCDReader::isTrackAudio ( int trackNum ) const

Returns true if a given track is an audio track.

Parameters

trackNum the track number, where 0 is the first track.

◆ getTrackOffsets()

const Array<int>& AudioCDReader::getTrackOffsets ( ) const

Returns an array of sample offsets for the start of each track, followed by the sample position of the end of the CD.

◆ refreshTrackLengths()

void AudioCDReader::refreshTrackLengths ( )

Refreshes the object's table of contents.

If the disc has been ejected and a different one put in since this object was created, this will cause it to update its idea of how many tracks there are, etc.

◆ enableIndexScanning()

void AudioCDReader::enableIndexScanning ( bool enabled )

Enables scanning for indexes within tracks.

See also: getLastIndex

◆ getLastIndex()

int AudioCDReader::getLastIndex ( ) const

Returns the index number found during the last read() call.

Index scanning is turned off by default - turn it on with enableIndexScanning().

Then when the read() method is called, if it comes across an index within that block, the index number is stored and returned by this method.

Some devices might not support indexes, of course.

(If you don't know what CD indexes are, it's unlikely you'll ever need them).

See also: enableIndexScanning

◆ findIndexesInTrack()

Array<int> AudioCDReader::findIndexesInTrack ( const int trackNumber )

Scans a track to find the position of any indexes within it.

Parameters

trackNumber the track to look in, where 0 is the first track on the disc

Returns: an array of sample positions of any index points found (not including the index that marks the start of the track)

◆ getCDDBId()

int AudioCDReader::getCDDBId ( )

Returns the CDDB id number for the CD.

It's not a great way of identifying a disc, but it's traditional.

◆ ejectDisk()

void AudioCDReader::ejectDisk ( )

Tries to eject the disk.

Ejecting the disk might not actually be possible, e.g. if some other process is using it.

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

juce_AudioCDReader.h

Public Types

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ anonymous enum

Constructor & Destructor Documentation

◆ ~AudioCDReader()

Member Function Documentation

◆ getAvailableCDNames()

◆ createReaderForCD()

◆ readSamples()

◆ isCDStillPresent()

◆ getNumTracks()

◆ getPositionOfTrackStart()

◆ isTrackAudio()

◆ getTrackOffsets()

◆ refreshTrackLengths()

◆ enableIndexScanning()

◆ getLastIndex()

◆ findIndexesInTrack()

◆ getCDDBId()

◆ ejectDisk()