kernel/user space shared circular buffer More...

#include <dx_stream.h>

Inheritance diagram for dx::circular:

Collaboration diagram for dx::circular:

Classes
struct	channel
	copy/mix channel converters More...

struct	channel< dst_t, src_t, false, false, typename std::enable_if_t< std::is_floating_point_v< dst_t >==std::is_floating_point_v< src_t > > >

struct	channel< dst_t, src_t, false, true >

struct	channel< dst_t, src_t, true, false >

struct	channel< dst_t, src_t, up, dn, typename std::enable_if_t< std::is_floating_point_v< dst_t > &&!std::is_floating_point_v< src_t > > >

struct	channel< dst_t, src_t, up, dn, typename std::enable_if_t<!std::is_floating_point_v< dst_t > &&std::is_floating_point_v< src_t > > >

struct	format

Public Member Functions
uint64_t	empty () const

uint64_t	empty (uint64_t position) const

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	force_read (ext_t const dst, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t channels_dst=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	force_read (ext_t *dst, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
bool	force_read (volatile uint64_t &position, ext_t const dst, uint64_t bulk, uint32_t channels_circular=1, uint32_t channels_dst=1, uint32_t circular_offset=0, uint32_t interleaved=1)
	multi channel interleaved bulk read from circular buffer with format conversion if applicable

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	force_read (volatile uint64_t &position, ext_t *dst, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
bool	force_write (const ext_t const src, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t channels_src=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	force_write (const ext_t *src, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename data_t >
bool	force_write (data_t const const *src, uint64_t clients, uint64_t channels, uint64_t bulk)

template<typename circular_t , typename src_t >
bool	force_write (src_t const const *src, uint32_t clients, uint32_t channels=1, uint64_t bulk=1)
	multi channel multi client bulk mix into circular buffer with format conversion if applicable src[client][channel][sample]

template<typename ext_t , typename circular_t = ext_t>
bool	force_write (volatile uint64_t &position, const ext_t const src, uint64_t bulk, uint32_t channels_circular=1, uint32_t channels_src=1, uint32_t circular_offset=0, uint32_t interleaved=1)
	multi channel interleaved bulk write into circular buffer with format conversion if applicable

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	force_write (volatile uint64_t &position, const ext_t *src, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)
	single channel convenience access templates

void	initialize ()

void	initialize (uint64_t backingstore_size)

uint64_t	loop () const

template<typename callback_t >
void	move (callback_t &callback, uint64_t max)

template<typename data_t >
hide_if_ptr< data_t >	operator<< (const data_t &src)

template<typename data_t >
hide_if_ptr< data_t >	operator>> (data_t &dst)

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	read (ext_t const dst, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t channels_dst=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	read (ext_t *dst, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	read (volatile uint64_t &position, ext_t const dst, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t channels_dst=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	read (volatile uint64_t &position, ext_t *dst, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename dst_t = uint8_t>
dst_t *	simulate_read (uint64_t bulk=1)

template<typename dst_t = uint8_t>
dst_t *	simulate_read (volatile uint64_t &position, uint64_t bulk)

uint8_t *	simulate_write (uint64_t bulk)
	simulate write by advancing write idx and take care of wrap write optimization

uint64_t	used () const

uint64_t	used (uint64_t position) const

template<typename ext_t , typename circular_t = ext_t>
bool	write (const ext_t const src, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t channels_src=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	write (const ext_t *src, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)

template<typename ext_t , typename circular_t = ext_t>
bool	write (volatile uint64_t &position, const ext_t const src, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t channels_src=1, uint32_t circular_offset=0, uint32_t interleaved=1)
	bulk write into circular buffer with format conversion if applicable

template<typename ext_t , typename circular_t = ext_t>
hide_if_ptr< ext_t >	write (volatile uint64_t &position, const ext_t *src, uint64_t bulk=1, uint32_t channels_circular=1, uint32_t circular_offset=0, uint32_t interleaved=1)

Public Attributes
struct {

volatile uint64_t count
	cycle counter More...

volatile uint64_t reference
	sample reference of taken timestamp More...

volatile uint64_t size
	cycle length in bytes (each cycle length bytes a new timestamp is generated) More...

volatile int64_t timestamp
	timestamp of current timestamp cycle More...

}	cycle

uint8_t	data [1]

volatile uint64_t	dropout
	dropout counter

volatile uint64_t	rx
	single consumers current read index

uint64_t	size
	size of buffer in bytes

volatile int64_t	timestamp
	current rx/tx timestamp

volatile uint64_t	tx
	producers current write index

Static Public Attributes
static constexpr format	any = {}

static constexpr format	audio = {.audio= true,}

static constexpr format	float32 = {.audio= true, .real=true, .resolution= 32, .size= sizeof(float),}

static constexpr format	float64 = {.audio= true, .real=true, .resolution= 64, .size= sizeof(double),}

static constexpr format	invalid = {}

static constexpr format	midi = {.midi= true,}

static constexpr format	pcm16 = {.audio= true, .resolution= 16, .size= sizeof(int16_t),}

static constexpr format	pcm24 = {.audio= true, .resolution= 24, .size= sizeof(dx::int24),}

static constexpr format	pcm24in32hi = {.audio= true, .resolution= 24, .size= sizeof(int32_t),}

static constexpr format	pcm24in32lo = {.audio= true, .resolution= 24, .size= sizeof(int32_t), .alignment= format::alignment::low,}

static constexpr format	pcm32 = {.audio= true, .resolution= 32, .size= sizeof(int32_t),}

Detailed Description

kernel/user space shared circular buffer

this buffer is non-blocking for single-consumer/single-producer configurations; multiple producer write interleaved while obtaining shadow.tx; if shadow.tx== tx the producer is allowed to write into the buffer after advancing shadow.tx to the final tx position; once tx reaches shadow.tx the write is terminated and the producer can start a write cycle. multiple consumer each hold there own rx and read between rx and cycle.tx.

Member Function Documentation

◆ empty() [1/2]

uint64_t dx::circular::empty ( ) const

inline

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◆ empty() [2/2]

uint64_t dx::circular::empty ( uint64_t position ) const

inline

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◆ force_read() [1/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::force_read	(	ext_t const	dst,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	channels_dst = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ force_read() [2/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::force_read	(	ext_t *	dst,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ force_read() [3/4]

template<typename ext_t , typename circular_t = ext_t>

bool dx::circular::force_read	(	volatile uint64_t &	position,
		ext_t const	dst,
		uint64_t	bulk,
		uint32_t	channels_circular = 1,
		uint32_t	channels_dst = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

multi channel interleaved bulk read from circular buffer with format conversion if applicable

return true if enough data is available in circular space

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◆ force_read() [4/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::force_read	(	volatile uint64_t &	position,
		ext_t *	dst,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ force_write() [1/6]

template<typename ext_t , typename circular_t = ext_t>

bool dx::circular::force_write	(	const ext_t const	src,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	channels_src = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ force_write() [2/6]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::force_write	(	const ext_t *	src,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ force_write() [3/6]

template<typename data_t >

bool dx::circular::force_write	(	data_t const const *	src,
		uint64_t	clients,
		uint64_t	channels,
		uint64_t	bulk )

inline

◆ force_write() [4/6]

template<typename circular_t , typename src_t >

bool dx::circular::force_write	(	src_t const const *	src,
		uint32_t	clients,
		uint32_t	channels = 1,
		uint64_t	bulk = 1 )

inline

multi channel multi client bulk mix into circular buffer with format conversion if applicable src[client][channel][sample]

return true if data fit into empty space

◆ force_write() [5/6]

template<typename ext_t , typename circular_t = ext_t>

bool dx::circular::force_write	(	volatile uint64_t &	position,
		const ext_t const	src,
		uint64_t	bulk,
		uint32_t	channels_circular = 1,
		uint32_t	channels_src = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

multi channel interleaved bulk write into circular buffer with format conversion if applicable

return true if data fit into circular space false if data fit not or older data had to be overwritten

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◆ force_write() [6/6]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::force_write	(	volatile uint64_t &	position,
		const ext_t *	src,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

single channel convenience access templates

◆ initialize() [1/2]

void dx::circular::initialize ( )

inline

◆ initialize() [2/2]

void dx::circular::initialize ( uint64_t backingstore_size )

inline

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◆ loop()

uint64_t dx::circular::loop ( ) const

inline

◆ move()

template<typename callback_t >

void dx::circular::move	(	callback_t &	callback,
		uint64_t	max )

inline

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◆ operator<<()

template<typename data_t >

hide_if_ptr< data_t > dx::circular::operator<< ( const data_t & src )

inline

◆ operator>>()

template<typename data_t >

hide_if_ptr< data_t > dx::circular::operator>> ( data_t & dst )

inline

◆ read() [1/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::read	(	ext_t const	dst,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	channels_dst = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

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◆ read() [2/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::read	(	ext_t *	dst,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ read() [3/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::read	(	volatile uint64_t &	position,
		ext_t const	dst,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	channels_dst = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

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◆ read() [4/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::read	(	volatile uint64_t &	position,
		ext_t *	dst,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ simulate_read() [1/2]

template<typename dst_t = uint8_t>

dst_t * dx::circular::simulate_read ( uint64_t bulk = 1 )

inline

◆ simulate_read() [2/2]

template<typename dst_t = uint8_t>

dst_t * dx::circular::simulate_read	(	volatile uint64_t &	position,
		uint64_t	bulk )

inline

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◆ simulate_write()

uint8_t * dx::circular::simulate_write ( uint64_t bulk )

inline

simulate write by advancing write idx and take care of wrap write optimization

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◆ used() [1/2]

uint64_t dx::circular::used ( ) const

inline

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◆ used() [2/2]

uint64_t dx::circular::used ( uint64_t position ) const

inline

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◆ write() [1/4]

template<typename ext_t , typename circular_t = ext_t>

bool dx::circular::write	(	const ext_t const	src,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	channels_src = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

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◆ write() [2/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::write	(	const ext_t *	src,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

◆ write() [3/4]

template<typename ext_t , typename circular_t = ext_t>

bool dx::circular::write	(	volatile uint64_t &	position,
		const ext_t const	src,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	channels_src = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

bulk write into circular buffer with format conversion if applicable

return true if data fit into empty space

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◆ write() [4/4]

template<typename ext_t , typename circular_t = ext_t>

hide_if_ptr< ext_t > dx::circular::write	(	volatile uint64_t &	position,
		const ext_t *	src,
		uint64_t	bulk = 1,
		uint32_t	channels_circular = 1,
		uint32_t	circular_offset = 0,
		uint32_t	interleaved = 1 )

inline

Member Data Documentation

◆ any

constexpr format dx::circular::any = {}

staticconstexpr

◆ audio

constexpr format dx::circular::audio = {.audio= true,}

staticconstexpr

◆ count

volatile uint64_t dx::circular::count

cycle counter

◆ [struct]

struct { ... } dx::circular::cycle

◆ data

uint8_t dx::circular::data[1]

◆ dropout

volatile uint64_t dx::circular::dropout

dropout counter

◆ float32

constexpr format dx::circular::float32 = {.audio= true, .real=true, .resolution= 32, .size= sizeof(float),}

staticconstexpr

◆ float64

constexpr format dx::circular::float64 = {.audio= true, .real=true, .resolution= 64, .size= sizeof(double),}

staticconstexpr

◆ invalid

constexpr format dx::circular::invalid = {}

staticconstexpr

◆ midi

constexpr format dx::circular::midi = {.midi= true,}

staticconstexpr

◆ pcm16

constexpr format dx::circular::pcm16 = {.audio= true, .resolution= 16, .size= sizeof(int16_t),}

staticconstexpr

◆ pcm24

constexpr format dx::circular::pcm24 = {.audio= true, .resolution= 24, .size= sizeof(dx::int24),}

staticconstexpr

◆ pcm24in32hi

constexpr format dx::circular::pcm24in32hi = {.audio= true, .resolution= 24, .size= sizeof(int32_t),}

staticconstexpr

◆ pcm24in32lo

constexpr format dx::circular::pcm24in32lo = {.audio= true, .resolution= 24, .size= sizeof(int32_t), .alignment= format::alignment::low,}

staticconstexpr

◆ pcm32

constexpr format dx::circular::pcm32 = {.audio= true, .resolution= 32, .size= sizeof(int32_t),}

staticconstexpr

◆ reference

volatile uint64_t dx::circular::reference

sample reference of taken timestamp

◆ rx

volatile uint64_t dx::circular::rx

single consumers current read index

◆ size [1/2]

uint64_t dx::circular::size

size of buffer in bytes

◆ size [2/2]

volatile uint64_t dx::circular::size

cycle length in bytes (each cycle length bytes a new timestamp is generated)

◆ timestamp

volatile int64_t dx::circular::timestamp

current rx/tx timestamp

timestamp of current timestamp cycle

◆ tx

volatile uint64_t dx::circular::tx

producers current write index

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

dx_stream.h

Classes

Public Member Functions

Public Attributes

Static Public Attributes

Detailed Description

Member Function Documentation

◆ empty() [1/2]

◆ empty() [2/2]

◆ force_read() [1/4]

◆ force_read() [2/4]

◆ force_read() [3/4]

◆ force_read() [4/4]

◆ force_write() [1/6]

◆ force_write() [2/6]

◆ force_write() [3/6]

◆ force_write() [4/6]

◆ force_write() [5/6]

◆ force_write() [6/6]

◆ initialize() [1/2]

◆ initialize() [2/2]

◆ loop()

◆ move()

◆ operator<<()

◆ operator>>()

◆ read() [1/4]

◆ read() [2/4]

◆ read() [3/4]

◆ read() [4/4]

◆ simulate_read() [1/2]

◆ simulate_read() [2/2]

◆ simulate_write()

◆ used() [1/2]

◆ used() [2/2]

◆ write() [1/4]

◆ write() [2/4]

◆ write() [3/4]

◆ write() [4/4]

Member Data Documentation

◆ any

◆ audio

◆ count

◆ [struct]

◆ data

◆ dropout

◆ float32

◆ float64

◆ invalid

◆ midi

◆ pcm16

◆ pcm24

◆ pcm24in32hi

◆ pcm24in32lo

◆ pcm32

◆ reference

◆ rx

◆ size [1/2]

◆ size [2/2]

◆ timestamp

◆ tx