ReverseReader Class Reference

This class reads another reader from back to front. More...

#include <ReverseReader.h>

Inheritance diagram for ReverseReader:

Public Member Functions
	ReverseReader (std::shared_ptr< IReader > reader)
	Creates a new reverse reader.
virtual void	seek (int position)
	Seeks to a specific position in the source.
virtual int	getLength () const
	Returns an approximated length of the source in samples.
virtual int	getPosition () const
	Returns the position of the source as a sample count value.
virtual void	read (int &length, bool &eos, sample_t *buffer)
	Request to read the next length samples out of the source.
Public Member Functions inherited from EffectReader
	EffectReader (std::shared_ptr< IReader > reader)
	Creates a new effect reader.
virtual	~EffectReader ()
	Destroys the reader.
virtual bool	isSeekable () const
	Tells whether the source provides seeking functionality or not.
virtual Specs	getSpecs () const
	Returns the specification of the reader.
Public Member Functions inherited from IReader
virtual	~IReader ()
	Destroys the reader.

Additional Inherited Members
Protected Attributes inherited from EffectReader
std::shared_ptr< IReader >	m_reader
	The reader to read from.

Detailed Description

This class reads another reader from back to front.

Note

The underlying reader must be seekable.

Constructor & Destructor Documentation

ReverseReader()

ReverseReader::ReverseReader

(

std::shared_ptr< IReader >

reader

)

Creates a new reverse reader.

Parameters

reader

The reader to read from.

Exceptions

Exception

Thrown if the reader specified has an undeterminable/infinite length or is not seekable.

Member Function Documentation

getLength()

virtual int ReverseReader::getLength ( ) const

virtual

Returns an approximated length of the source in samples.

Returns

The length as sample count. May be negative if unknown.

Reimplemented from EffectReader.

getPosition()

virtual int ReverseReader::getPosition ( ) const

virtual

Returns the position of the source as a sample count value.

Returns

The current position in the source. A negative value indicates that the position is unknown.

Warning

The value returned doesn't always have to be correct for readers, especially after seeking.

Reimplemented from EffectReader.

read()

virtual void ReverseReader::read ( int & length, bool & eos, sample_t * buffer )

virtual

Request to read the next length samples out of the source.

The buffer supplied has the needed size.

Parameters

[in,out]	length	The count of samples that should be read. Shall contain the real count of samples after reading, in case there were only fewer samples available. A smaller value also indicates the end of the reader.
[out]	eos	End of stream, whether the end is reached or not.
[in]	buffer	The pointer to the buffer to read into.

Reimplemented from EffectReader.

seek()

virtual void ReverseReader::seek ( int position )

virtual

Seeks to a specific position in the source.

Parameters

position

The position to seek for measured in samples. To get from a given time to the samples you simply have to multiply the time value in seconds with the sample rate of the reader.

Warning

This may work or not, depending on the actual reader.

Reimplemented from EffectReader.

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

• fx/ReverseReader.h