dx::stream::clock Struct Reference

select/get stream sample rate/iosize More...

#include <dx_stream.h>

Classes
struct	consumer
	one clock consumer's share of the domain: its buffer switch is due every iosize samples More...
struct	monitor
	performance monitor shared memory More...

Public Types
enum	bitmap : uint32_t {   none = 0 , rate8 = 1<< 0 , rate16 = 1<< 1 , rate22 = 1<< 2 ,   rate32 = 1<< 3 , rate44 = 1<< 4 , rate48 = 1<< 5 , rate88 = 1<< 6 ,   rate96 = 1<< 7 , rate176 =1<< 8 , rate192 =1<< 9 , rate352 =1<< 10 ,   rate384 =1<< 11 , rates = 12 , lo = rate44|rate48 , mid = rate88|rate96 ,   hi = rate176|rate192 , ex = rate352|rate384 , lomid = lo|mid , std = hi|mid|lo }
enum	strategy : uint32_t { plain , yield , spin }

Static Public Member Functions
static uint32_t	align (bitmapbitmap bitmapbitmap, uint32_t samplerate)
static bool	describe (std::ostream &os, const enum bitmapbitmap &bitmapbitmap, uint32_t samplerate=0)
static uint32_t	frequency (uint32_t shift)
	frequency helper functions returns the numerical frequency from given sample rate bit field
static bitmap	range (uint32_t min, uint32_t max)
	frequency alignment helper functions aligns the sample rate from given numerical frequency to the closest valid frequency given in the bitfield
static bitmap	shift (uint32_t frequency)
	frequency helper functions returns the sample rate bit field from given numerical frequency
template<typename source_t>
static void	wait (source_t &source, strategystrategy strategystrategy, int64_t objective)
	waits toward objective, in ns: the source's timer up to the strategy's lead, polling the rest - the environment supplies now() in ns, sleep(ns), false where a halt cut it short, and relax(strategy), one poll step

Public Attributes
uint32_t	domain {}
	clock domain bitfield

Static Public Attributes
static constexpr uint32_t	frequencies [] {8000, 16000, 22050, 32000, 44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000}
static constexpr int64_t	lead [] {0, 2000000, 2000000}
static constexpr const char *	strategy_name [] {"plain", "yield", "spin"}
	index= the strategy value

Detailed Description

select/get stream sample rate/iosize

Member Enumeration Documentation

bitmap

enum dx::stream::clock::bitmap : uint32_t

Enumerator
none
rate8
rate16
rate22
rate32
rate44
rate48
rate88
rate96
rate176
rate192
rate352
rate384
rates
lo
mid
hi
ex
lomid
std

strategy

enum dx::stream::clock::strategy : uint32_t

Enumerator
plain
yield
spin

Member Function Documentation

align()

uint32_t dx::stream::clock::align ( bitmap bitmap, uint32_t samplerate )

inlinestatic

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describe()

bool dx::stream::clock::describe ( std::ostream & os, const enum bitmap & bitmap, uint32_t samplerate = 0 )

inlinestatic

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frequency()

uint32_t dx::stream::clock::frequency ( uint32_t shift )

inlinestatic

frequency helper functions returns the numerical frequency from given sample rate bit field

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range()

bitmap dx::stream::clock::range ( uint32_t min, uint32_t max )

inlinestatic

frequency alignment helper functions aligns the sample rate from given numerical frequency to the closest valid frequency given in the bitfield

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shift()

bitmap dx::stream::clock::shift ( uint32_t frequency )

inlinestatic

frequency helper functions returns the sample rate bit field from given numerical frequency

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wait()

template<typename source_t>

void dx::stream::clock::wait ( source_t & source, strategy strategy, int64_t objective )

inlinestatic

waits toward objective, in ns: the source's timer up to the strategy's lead, polling the rest - the environment supplies now() in ns, sleep(ns), false where a halt cut it short, and relax(strategy), one poll step

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Member Data Documentation

domain

uint32_t dx::stream::clock::domain {}

clock domain bitfield

frequencies

uint32_t dx::stream::clock::frequencies[] {8000, 16000, 22050, 32000, 44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000}

staticconstexpr

lead

int64_t dx::stream::clock::lead[] {0, 2000000, 2000000}

staticconstexpr

ns by strategy: how early a wait hands over from its timer to polling

strategy_name

const char* dx::stream::clock::strategy_name[] {"plain", "yield", "spin"}

staticconstexpr

index= the strategy value

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

• dx_stream.h