BufferRTOS< T > Class Template Reference

Buffer implementation which is using a FreeRTOS StreamBuffer. The default allocator uses psram is available. More...

#include <BufferRTOS.h>

Inheritance diagram for BufferRTOS< T >:

Public Member Functions
	BufferRTOS (size_t streamBufferSize, size_t xTriggerLevel=1, TickType_t writeMaxWait=portMAX_DELAY, TickType_t readMaxWait=portMAX_DELAY, Allocator &allocator=DefaultAllocator)
T *	address () override
	returns the address of the start of the physical read buffer
int	available () override
	provides the number of entries that are available to read
int	availableForWrite () override
	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 ()
bool	isFull () override
	checks if the buffer is full
virtual float	levelPercent ()
	Returns the level of the buffer in %.
	operator bool ()
T	peek () override
	peeks the actual entry from the buffer
T	read () override
	reads a single value
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 () override
	clears the buffer
bool	resize (size_t size)
	Re-Allocats the memory and the queue.
void	setReadFromISR (bool active)
void	setReadMaxWait (TickType_t ticks)
void	setWriteFromISR (bool active)
void	setWriteMaxWait (TickType_t ticks)
size_t	size ()
bool	write (T data) override
	write add an entry to the buffer
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
void	end ()
	Release resurces: call resize to restart again.
bool	setup ()
void	setWritePos (int pos)

Protected Attributes
size_t	current_size_bytes = 0
friend	NBuffer< T >
Allocator *	p_allocator = nullptr
uint8_t *	p_data = nullptr
bool	read_from_isr = false
int	readWait = portMAX_DELAY
StaticStreamBuffer_t	static_stream_buffer
size_t	trigger_level = 0
bool	write_from_isr = false
int	writeWait = portMAX_DELAY
BaseType_t	xHigherPriorityTaskWoken = pdFALSE
StreamBufferHandle_t	xStreamBuffer = nullptr

Detailed Description

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

Buffer implementation which is using a FreeRTOS StreamBuffer. The default allocator uses psram is available.

Author

Phil Schatzmann

Copyright

GPLv3 *

Template Parameters

T

Member Function Documentation

address()

template<typename T >

T * address ( )

inlineoverridevirtual

returns the address of the start of the physical read buffer

Implements BaseBuffer< T >.

available()

template<typename T >

int available ( )

inlineoverridevirtual

provides the number of entries that are available to read

Implements BaseBuffer< T >.

availableForWrite()

template<typename T >

int availableForWrite ( )

inlineoverridevirtual

provides the number of entries that are available to write

Implements BaseBuffer< T >.

clearArray()

template<typename T >

virtual int clearArray ( int  len )

inlinevirtualinherited

Removes the next len entries.

Reimplemented in SingleBuffer< T >, SingleBuffer< int16_t >, and SingleBuffer< uint8_t >.

isFull()

template<typename T >

bool isFull ( )

inlineoverridevirtual

checks if the buffer is full

Implements BaseBuffer< T >.

peek()

template<typename T >

T peek ( )

inlineoverridevirtual

peeks the actual entry from the buffer

Implements BaseBuffer< T >.

read()

template<typename T >

T read ( )

inlineoverridevirtual

reads a single value

Implements BaseBuffer< T >.

readArray()

template<typename T >

int readArray ( T  data[], int  len  )

inlinevirtual

reads multiple values

Reimplemented from BaseBuffer< T >.

reset()

template<typename T >

void reset ( )

inlineoverridevirtual

clears the buffer

Implements BaseBuffer< T >.

setup()

template<typename T >

bool setup ( )

inlineprotected

The allocation has been postponed to be done here, so that we can e.g. use psram

size()

template<typename T >

size_t size ( )

inlinevirtual

Implements BaseBuffer< T >.

write()

template<typename T >

bool write ( T  data )

inlineoverridevirtual

write add an entry to the buffer

Implements BaseBuffer< T >.

writeArray()

template<typename T >

int writeArray ( const T  data[], int  len  )

inlinevirtual

Fills the buffer data.

Reimplemented from BaseBuffer< T >.

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

• src/AudioTools/Concurrency/RTOS/BufferRTOS.h