oboe::FifoBuffer Class Reference

Public Member Functions
	FifoBuffer (uint32_t bytesPerFrame, uint32_t capacityInFrames)
	FifoBuffer (uint32_t bytesPerFrame, uint32_t capacityInFrames, std::atomic< uint64_t > *readCounterAddress, std::atomic< uint64_t > *writeCounterAddress, uint8_t *dataStorageAddress)
int32_t	convertFramesToBytes (int32_t frames)
int32_t	read (void *destination, int32_t framesToRead)
int32_t	write (const void *source, int32_t framesToWrite)
uint32_t	getBufferCapacityInFrames () const
int32_t	readNow (void *destination, int32_t numFrames)
uint32_t	getFullFramesAvailable ()
uint32_t	getBytesPerFrame () const
uint64_t	getReadCounter () const
void	setReadCounter (uint64_t n)
uint64_t	getWriteCounter ()
void	setWriteCounter (uint64_t n)

Constructor & Destructor Documentation

FifoBuffer() [1/2]

oboe::FifoBuffer::FifoBuffer	(	uint32_t	bytesPerFrame,
		uint32_t	capacityInFrames )

Construct a FifoBuffer.

Parameters

bytesPerFrame	amount of bytes for one frame
capacityInFrames	the capacity of frames in fifo

FifoBuffer() [2/2]

oboe::FifoBuffer::FifoBuffer	(	uint32_t	bytesPerFrame,
		uint32_t	capacityInFrames,
		std::atomic< uint64_t > *	readCounterAddress,
		std::atomic< uint64_t > *	writeCounterAddress,
		uint8_t *	dataStorageAddress )

Construct a FifoBuffer. To be used if the storage allocation is done outside of FifoBuffer.

Parameters

bytesPerFrame	amount of bytes for one frame
capacityInFrames	capacity of frames in fifo
readCounterAddress	address of read counter
writeCounterAddress	address of write counter
dataStorageAddress	address of storage

Member Function Documentation

convertFramesToBytes()

int32_t oboe::FifoBuffer::convertFramesToBytes

(

int32_t

frames

)

Convert a number of frames in bytes.

Returns

number of bytes

getBufferCapacityInFrames()

uint32_t oboe::FifoBuffer::getBufferCapacityInFrames

(

)

const

Get the buffer capacity in frames.

Returns

number of frames

getBytesPerFrame()

uint32_t oboe::FifoBuffer::getBytesPerFrame ( ) const

inline

Get the amount of bytes per frame.

Returns

number of bytes per frame

getFullFramesAvailable()

uint32_t oboe::FifoBuffer::getFullFramesAvailable ( )

inline

Get the number of frames in the fifo.

Returns

number of frames actually in the buffer

getReadCounter()

uint64_t oboe::FifoBuffer::getReadCounter ( ) const

inline

Get the position of read counter.

Returns

position of read counter

getWriteCounter()

uint64_t oboe::FifoBuffer::getWriteCounter ( )

inline

Get the position of write counter.

Returns

position of write counter

read()

int32_t oboe::FifoBuffer::read	(	void *	destination,
		int32_t	framesToRead )

Read framesToRead or, if not enough, then read as many as are available.

Parameters

destination
framesToRead	number of frames requested

Returns

number of frames actually read

readNow()

int32_t oboe::FifoBuffer::readNow	(	void *	destination,
		int32_t	numFrames )

Calls read(). If all of the frames cannot be read then the remainder of the buffer is set to zero.

Parameters

destination
framesToRead	number of frames requested

Returns

number of frames actually read

setReadCounter()

void oboe::FifoBuffer::setReadCounter ( uint64_t n )

inline

Set the position of read counter.

Parameters

n	position of read counter

setWriteCounter()

void oboe::FifoBuffer::setWriteCounter ( uint64_t n )

inline

Set the position of write counter.

Parameters

n	position of write counter

write()

int32_t oboe::FifoBuffer::write	(	const void *	source,
		int32_t	framesToWrite )

Write framesToWrite or, if too enough, then write as many as the fifo are not empty.

Parameters

destination
framesToWrite	number of frames requested

Returns

number of frames actually write

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

• include/oboe/FifoBuffer.h