VariableSpeedRingBuffer< T > Class Template Reference

Optimized Buffer implementation for Pitch Shift. We try to interpolate the samples and restore the phase when the read pointer and write pointer overtake each other. More...

#include <PitchShift.h>

Inheritance diagram for VariableSpeedRingBuffer< T >:

Public Member Functions
	VariableSpeedRingBuffer (int size=0, float increment=1.0)
virtual T *	address ()
	returns the address of the start of the physical read buffer
virtual int	available ()
	provides the number of entries that are available to read
virtual int	availableForWrite ()
	provides the number of entries that are available to write
void	clear ()
	same as reset
virtual int	clearArray (int len)
	Removes the next len entries.
bool	isEmpty ()
virtual bool	isFull ()
	checks if the buffer is full
virtual float	levelPercent ()
	Returns the level of the buffer in %.
T	peek ()
	peeks the actual entry from the buffer
T	read ()
	reads a single value
virtual int	readArray (T data[], int len)
	reads multiple values
int	readFrames (T data[][2], int len)
	reads multiple values for array of 2 dimensional frames
template<int rows, int channels>
int	readFrames (T(&data)[rows][channels])
void	reset ()
	Reset pointer positions and clear buffer.
void	resize (int size)
void	setIncrement (float increment)
size_t	size ()
bool	write (T sample)
	write add an entry to the buffer
virtual int	writeArray (const T data[], int len)
	Fills the buffer data.
virtual int	writeArrayOverwrite (const T data[], int len)
	Fills the buffer data and overwrites the oldest data if the buffer is full.

Protected Member Functions
T	getValue (int pos)
	provides the value from the buffer: Allows pos > buffer_size
void	handleReadWriteOverrun (T last_value)
T	interpolate (float read_pos)
	Calculate exact sample value for float position.
bool	isMatching (T value1, bool incrementing, T v1, T v2)
void	setWritePos (int pos)

Protected Attributes
Vector< T >	buffer {0}
int	buffer_size
bool	incrementing
T	last_value = 0
friend	NBuffer< T >
float	read_increment = 0.0
float	read_pos_float = 0.0
int	write_pos = 0

Detailed Description

template<typename T>
class audio_tools::VariableSpeedRingBuffer< T >

Optimized Buffer implementation for Pitch Shift. We try to interpolate the samples and restore the phase when the read pointer and write pointer overtake each other.

Template Parameters

T

Member Function Documentation

handleReadWriteOverrun()

void handleReadWriteOverrun ( T  last_value )

inlineprotected

When the read pointer is overpassing the write pointer or the write pointer is overpassing the read pointer we need to phase shift

isMatching()

bool isMatching ( T  value1, bool  incrementing, T  v1, T  v2  )

inlineprotected

checks if we can fit the last value between 2 existing values in the buffer

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

• src/AudioTools/CoreAudio/AudioEffects/PitchShift.h