MetaDataICY Class Reference

Icecast/Shoutcast Metadata Handling. Metadata class which splits the data into audio and metadata. The result is provided via callback methods. see https://www.codeproject.com/Articles/11308/SHOUTcast-Stream-Ripper. More...

#include <MetaDataICY.h>

Inheritance diagram for MetaDataICY:

Public Member Functions
	MetaDataICY (int metaint)
	We just process the Metadata and ignore the audio info.
virtual void	begin () override
	Resets all counters and restarts the prcessing.
virtual void	end () override
	Resets all counters and restarts the prcessing.
virtual bool	hasMetaData ()
	Returns true if the ICY stream contains metadata.
virtual bool	isData ()
	returns true if the actual bytes is an audio data byte (e.g.mp3)
virtual int	metaInt ()
	provides the metaint
virtual void	processChar (char ch)
	character based state engine
virtual void	setAudioDataCallback (void(*fn)(const uint8_t *str, int len), int bufferLen=1024)
	Defines the audio callback function.
virtual void	setCallback (void(*fn)(MetaDataType info, const char *str, int len)) override
	Defines the metadata callback function.
virtual void	setIcyMetaInt (int value) override
	Defines the ICE metaint value which is provided by the web call!
virtual Status	status ()
	Returns the actual status of the state engine for the current byte.
virtual size_t	write (const uint8_t *data, size_t len) override

Protected Member Functions
virtual void	clear ()
virtual bool	isAscii (char *result, int l)
	Make sure that the result is a valid ASCII string.
bool	isAscii (uint8_t ch)
virtual int	metaSize (uint8_t metaSize)
	determines the meta data size from the size byte
virtual void	processData (char ch)
virtual void	processMetaData (char *metaData, int len)
virtual void	setupMetaData (int meta_size)
	allocates the memory to store the metadata / we support changing sizes

Protected Attributes
void(*	callback )(MetaDataType info, const char *str, int len) = nullptr
Status	currentStatus = ProcessData
uint8_t *	dataBuffer = nullptr
void(*	dataCallback )(const uint8_t *str, int len) = nullptr
int	dataLen = 0
int	dataPos = 0
bool	is_data
Vector< char >	metaData {0}
int	metaDataLen = 0
int	metaDataMaxLen = 0
int	metaDataPos = 0
int	mp3_blocksize = 0
Status	nextStatus = ProcessData
int	totalData = 0

Detailed Description

Icecast/Shoutcast Metadata Handling. Metadata class which splits the data into audio and metadata. The result is provided via callback methods. see https://www.codeproject.com/Articles/11308/SHOUTcast-Stream-Ripper.

Author

Phil Schatzmann

Copyright

GPLv3

Member Function Documentation

begin()

virtual void begin ( )

inlineoverridevirtual

Resets all counters and restarts the prcessing.

Implements AbstractMetaData.

end()

virtual void end ( )

inlineoverridevirtual

Resets all counters and restarts the prcessing.

Implements AbstractMetaData.

processData()

virtual void processData ( char  ch )

inlineprotectedvirtual

Collects the data in a buffer and executes the callback when the buffer is full

processMetaData()

virtual void processMetaData ( char *  metaData, int  len  )

inlineprotectedvirtual

e.g. StreamTitle=' House Bulldogs - But your love (Radio Edit)';StreamUrl='';

setCallback()

virtual void setCallback ( void(*)(MetaDataType info, const char *str, int len)  fn )

inlineoverridevirtual

Defines the metadata callback function.

Implements AbstractMetaData.

setIcyMetaInt()

virtual void setIcyMetaInt ( int  value )

inlineoverridevirtual

Defines the ICE metaint value which is provided by the web call!

Reimplemented from AbstractMetaData.

write()

virtual size_t write ( const uint8_t *  data, size_t  len  )

inlineoverridevirtual

Writes the data in order to retrieve the metadata and perform the corresponding callbacks

Implements AbstractMetaData.

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

• src/AudioTools/CoreAudio/AudioMetaData/MetaDataICY.h