vlc_mtime.h File Reference

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Data Structures
struct	date_t

Macros
#define	LAST_MDATE   ((vlc_tick_t)((uint64_t)(-1)/2))
#define	VLC_TICK_FROM_MS(ms)   ((CLOCK_FREQ / INT64_C(1000)) * (ms))
#define	MS_FROM_VLC_TICK(vtk)   ((vtk) / (CLOCK_FREQ / INT64_C(1000)))
#define	VLC_TICK_FROM_SEC(sec)   (CLOCK_FREQ * (sec))
#define	SEC_FROM_VLC_TICK(vtk)   ((vtk) / CLOCK_FREQ)
#define	vlc_tick_from_sec(sec)
#define	MSTRTIME_MAX_SIZE   22

Functions
static vlc_tick_t	vlc_tick_from_seci (int64_t sec)
static vlc_tick_t	vlc_tick_from_secf (double secf)
static double	secf_from_vlc_tick (vlc_tick_t vtk)
char *	secstotimestr (char *psz_buffer, int32_t secs)
	Convert seconds to a time in the format h:mm:ss. More...
void	date_Init (date_t *, uint32_t, uint32_t)
	Initialize a date_t. More...
void	date_Change (date_t *, uint32_t, uint32_t)
	Change a date_t. More...
void	date_Set (date_t *, vlc_tick_t)
	Set the date value of a date_t. More...
vlc_tick_t	date_Get (const date_t *)
	Get the date of a date_t. More...
void	date_Move (date_t *, vlc_tick_t)
	Move forwards or backwards the date of a date_t. More...
vlc_tick_t	date_Increment (date_t *, uint32_t)
	Increment the date and return the result, taking into account rounding errors. More...
vlc_tick_t	date_Decrement (date_t *, uint32_t)
	Decrement the date and return the result, taking into account rounding errors. More...
uint64_t	NTPtime64 (void)

Macro Definition Documentation

LAST_MDATE

#define LAST_MDATE   ((vlc_tick_t)((uint64_t)(-1)/2))

MS_FROM_VLC_TICK

#define MS_FROM_VLC_TICK

(

vtk

)

((vtk) / (CLOCK_FREQ / INT64_C(1000)))

MSTRTIME_MAX_SIZE

#define MSTRTIME_MAX_SIZE   22

SEC_FROM_VLC_TICK

#define SEC_FROM_VLC_TICK

(

vtk

)

((vtk) / CLOCK_FREQ)

VLC_TICK_FROM_MS

#define VLC_TICK_FROM_MS

(

ms

)

((CLOCK_FREQ / INT64_C(1000)) * (ms))

VLC_TICK_FROM_SEC

#define VLC_TICK_FROM_SEC

(

sec

)

(CLOCK_FREQ * (sec))

vlc_tick_from_sec

#define vlc_tick_from_sec

(

sec

)

Value:

_Generic((sec), \
        double:  vlc_tick_from_secf(sec), \
        float:   vlc_tick_from_secf(sec), \
        default: vlc_tick_from_seci(sec) )

Function Documentation

date_Change()

void date_Change	(	date_t *	p_date,
		uint32_t	i_divider_n,
		uint32_t	i_divider_d
	)

Change a date_t.

Parameters

date	to change
divider	(sample rate) numerator
divider	(sample rate) denominator

References date_t::i_divider_den, date_t::i_divider_num, and date_t::i_remainder.

date_Decrement()

vlc_tick_t date_Decrement	(	date_t *	p_date,
		uint32_t	i_nb_samples
	)

Decrement the date and return the result, taking into account rounding errors.

Parameters

date	to decrement
decrementation	in number of samples

Returns

date value

References CLOCK_FREQ, date_t::date, date_t::i_divider_den, date_t::i_divider_num, and date_t::i_remainder.

date_Get()

vlc_tick_t date_Get

(

const date_t *

p_date

)

Get the date of a date_t.

Parameters

date

to get

Returns

date value

References date_t::date.

date_Increment()

vlc_tick_t date_Increment	(	date_t *	p_date,
		uint32_t	i_nb_samples
	)

Increment the date and return the result, taking into account rounding errors.

Parameters

date	to increment
incrementation	in number of samples

Returns

date value

References CLOCK_FREQ, date_t::date, date_t::i_divider_den, date_t::i_divider_num, date_t::i_remainder, lldiv(), lldiv_t::quot, and lldiv_t::rem.

date_Init()

void date_Init	(	date_t *	p_date,
		uint32_t	i_divider_n,
		uint32_t	i_divider_d
	)

Initialize a date_t.

Parameters

date	to initialize
divider	(sample rate) numerator
divider	(sample rate) denominator

References date_t::date, date_t::i_divider_den, date_t::i_divider_num, and date_t::i_remainder.

date_Move()

void date_Move	(	date_t *	p_date,
		vlc_tick_t	i_difference
	)

Move forwards or backwards the date of a date_t.

Parameters

date	to move
difference	value

References date_t::date.

date_Set()

void date_Set	(	date_t *	p_date,
		vlc_tick_t	i_new_date
	)

Set the date value of a date_t.

Parameters

date	to set
date	value

References date_t::date, and date_t::i_remainder.

NTPtime64()

uint64_t NTPtime64

(

void

)

Returns

NTP 64-bits timestamp in host byte order.

References TIME_UTC, timespec_get(), timespec::tv_nsec, and timespec::tv_sec.

Referenced by vlc_rand_bytes(), and vlc_sdp_Start().

secf_from_vlc_tick()

static double secf_from_vlc_tick ( vlc_tick_t  vtk )

inlinestatic

References CLOCK_FREQ.

secstotimestr()

char* secstotimestr	(	char *	psz_buffer,
		int32_t	i_seconds
	)

Convert seconds to a time in the format h:mm:ss.

This function is provided for any interface function which need to print a time string in the format h:mm:ss date.

Parameters

secs	the date to be converted
psz_buffer	should be a buffer at least MSTRTIME_MAX_SIZE characters

Returns

psz_buffer is returned so this can be used as printf parameter.

References MSTRTIME_MAX_SIZE, secstotimestr(), and unlikely.

Referenced by secstotimestr().

vlc_tick_from_secf()

static vlc_tick_t vlc_tick_from_secf ( double  secf )

inlinestatic

vlc_tick_from_seci()

static vlc_tick_t vlc_tick_from_seci ( int64_t  sec )

inlinestatic