vlc_tick.h File Reference

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Data Structures
struct	date_t
	Timestamps without long-term rounding errors. More...

Macros
#define	VLC_TICK_MIN   INT64_MIN
#define	VLC_TICK_MAX   INT64_MAX
#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	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_US(us)   ((CLOCK_FREQ / INT64_C(1000000)) * (us))
#define	US_FROM_VLC_TICK(vtk)   ((vtk) / (CLOCK_FREQ / INT64_C(1000000)))
#define	VLC_TICK_FROM_NS(ns)   ((ns) * (CLOCK_FREQ / (INT64_C(1000000000))))
#define	NS_FROM_VLC_TICK(vtk)   ((vtk) / (CLOCK_FREQ / (INT64_C(1000000000))))
#define	MSFTIME_FROM_SEC(sec)   (INT64_C(10000000) * (sec)) /* seconds in msftime_t */
#define	MSFTIME_FROM_MS(sec)   (INT64_C(10000) * (sec)) /* milliseconds in msftime_t */
#define	VLC_TICK_FROM_MSFTIME(msft)   ((msft) * (CLOCK_FREQ / INT64_C(10000000))
#define	MSFTIME_FROM_VLC_TICK(vtk)   ((vtk) / (CLOCK_FREQ / INT64_C(10000000))
#define	vlc_tick_from_timeval(tv)    (vlc_tick_from_sec( (tv)->tv_sec ) + VLC_TICK_FROM_US( (tv)->tv_usec ))
#define	vlc_tick_from_timespec(tv)    (vlc_tick_from_sec( (tv)->tv_sec ) + VLC_TICK_FROM_NS( (tv)->tv_nsec ))
#define	MSTRTIME_MAX_SIZE   22

Typedefs
typedef int64_t	vlc_tick_t
	High precision date or time interval.
typedef int64_t	msftime_t

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)
static vlc_tick_t	vlc_tick_rate_duration (float frame_rate)
static vlc_tick_t	vlc_tick_from_samples (int64_t samples, unsigned samp_rate)
static int64_t	samples_from_vlc_tick (vlc_tick_t t, unsigned samp_rate)
static vlc_tick_t	vlc_tick_from_frac (uint64_t num, uint64_t den)
struct timespec *	vlc_tick_to_timespec (struct timespec *restrict ts, vlc_tick_t tick)
	Converts a VLC tick to a POSIX time specification.
char *	vlc_tick_to_str (char *psz_buffer, vlc_tick_t ticks)
	Convert seconds to a time in the format h:mm:ss.
void	date_Init (date_t *restrict date, uint32_t num, uint32_t den)
	Initializes a date_t.
void	date_Change (date_t *restrict date, uint32_t num, uint32_t den)
	Changes the rate of a date_t.
static void	date_Set (date_t *restrict date, vlc_tick_t value)
	Sets the exact timestamp of a date_t.
static vlc_tick_t	date_Get (const date_t *restrict date)
	Gets the current timestamp from a date_t.
vlc_tick_t	date_Increment (date_t *restrict date, uint32_t count)
	Increments a date.
vlc_tick_t	date_Decrement (date_t *restrict date, uint32_t count)
	Decrements a date.
uint64_t	vlc_ntp_time (void)
	Gets the current wallclock time as 64-bit NTP timestamp.

Macro Definition Documentation

MS_FROM_VLC_TICK

#define MS_FROM_VLC_TICK

(

vtk

)

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

MSFTIME_FROM_MS

#define MSFTIME_FROM_MS

(

sec

)

(INT64_C(10000) * (sec)) /* milliseconds in msftime_t */

MSFTIME_FROM_SEC

#define MSFTIME_FROM_SEC

(

sec

)

(INT64_C(10000000) * (sec)) /* seconds in msftime_t */

MSFTIME_FROM_VLC_TICK

#define MSFTIME_FROM_VLC_TICK

(

vtk

)

((vtk) / (CLOCK_FREQ / INT64_C(10000000))

MSTRTIME_MAX_SIZE

#define MSTRTIME_MAX_SIZE   22

NS_FROM_VLC_TICK

#define NS_FROM_VLC_TICK

(

vtk

)

((vtk) / (CLOCK_FREQ / (INT64_C(1000000000))))

SEC_FROM_VLC_TICK

#define SEC_FROM_VLC_TICK

(

vtk

)

((vtk) / CLOCK_FREQ)

US_FROM_VLC_TICK

#define US_FROM_VLC_TICK

(

vtk

)

((vtk) / (CLOCK_FREQ / INT64_C(1000000)))

VLC_TICK_FROM_MS

#define VLC_TICK_FROM_MS

(

ms

)

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

VLC_TICK_FROM_MSFTIME

#define VLC_TICK_FROM_MSFTIME

(

msft

)

((msft) * (CLOCK_FREQ / INT64_C(10000000))

VLC_TICK_FROM_NS

#define VLC_TICK_FROM_NS

(

ns

)

((ns) * (CLOCK_FREQ / (INT64_C(1000000000))))

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) )

vlc_tick_from_timespec

#define vlc_tick_from_timespec

(

tv

)

(vlc_tick_from_sec( (tv)->tv_sec ) + VLC_TICK_FROM_NS( (tv)->tv_nsec ))

vlc_tick_from_timeval

#define vlc_tick_from_timeval

(

tv

)

(vlc_tick_from_sec( (tv)->tv_sec ) + VLC_TICK_FROM_US( (tv)->tv_usec ))

VLC_TICK_FROM_US

#define VLC_TICK_FROM_US

(

us

)

((CLOCK_FREQ / INT64_C(1000000)) * (us))

VLC_TICK_MAX

#define VLC_TICK_MAX   INT64_MAX

VLC_TICK_MIN

#define VLC_TICK_MIN   INT64_MIN

Typedef Documentation

msftime_t

typedef int64_t msftime_t

vlc_tick_t

typedef int64_t vlc_tick_t

High precision date or time interval.

Store a high precision date or time interval. The maximum precision is the microsecond, and a 64 bits integer is used to avoid overflows (maximum time interval is then 292271 years, which should be long enough for any video). Dates are stored as microseconds since a common date (usually the epoch). Note that date and time intervals can be manipulated using regular arithmetic operators, and that no special functions are required.

Function Documentation

samples_from_vlc_tick()

static int64_t samples_from_vlc_tick ( vlc_tick_t  t, unsigned  samp_rate  )

inlinestatic

References CLOCK_FREQ.

Referenced by demux_vaControlHelper(), rtp_queue(), and stream_Silence().

secf_from_vlc_tick()

static double secf_from_vlc_tick ( vlc_tick_t  vtk )

inlinestatic

References CLOCK_FREQ.

vlc_ntp_time()

uint64_t vlc_ntp_time

(

void

)

Gets the current wallclock time as 64-bit NTP timestamp.

Returns

NTP 64-bits timestamp in host byte order

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

vlc_tick_from_frac()

static vlc_tick_t vlc_tick_from_frac ( uint64_t  num, uint64_t  den  )

inlinestatic

References lldiv(), lldiv_t::quot, lldiv_t::rem, vlc_tick_from_samples(), and vlc_tick_from_sec.

Referenced by mdate_perf().

vlc_tick_from_samples()

static vlc_tick_t vlc_tick_from_samples ( int64_t  samples, unsigned  samp_rate  )

inlinestatic

References CLOCK_FREQ.

Referenced by demux_vaControlHelper(), h264_chainsplit_MTAP(), IsPictureLateToProcess(), rtp_decode(), rtp_dequeue(), RunThread(), stream_GetDelay(), vlc_aout_stream_Play(), vlc_player_input_New(), vlc_tick_from_frac(), and vlc_tick_now().

vlc_tick_from_secf()

static vlc_tick_t vlc_tick_from_secf ( double  secf )

inlinestatic

References CLOCK_FREQ.

vlc_tick_from_seci()

static vlc_tick_t vlc_tick_from_seci ( int64_t  sec )

inlinestatic

References CLOCK_FREQ.

vlc_tick_rate_duration()

static vlc_tick_t vlc_tick_rate_duration ( float  frame_rate )

inlinestatic

References CLOCK_FREQ.

vlc_tick_to_str()

char * vlc_tick_to_str	(	char *	psz_buffer,
		vlc_tick_t	ticks
	)

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

ticks	the time 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, SEC_FROM_VLC_TICK, unlikely, and vlc_tick_to_str().

Referenced by input_title_GetName(), vlc_player_osd_Position(), and vlc_tick_to_str().

vlc_tick_to_timespec()

struct timespec * vlc_tick_to_timespec	(	struct timespec *restrict	ts,
		vlc_tick_t	tick
	)

Converts a VLC tick to a POSIX time specification.

Parameters

ts	[out] storage space for the time specification
tick	VLC tick

Returns

ts

References CLOCK_FREQ, lldiv(), NS_FROM_VLC_TICK, lldiv_t::quot, and lldiv_t::rem.

Referenced by vlc_atomic_timedwait(), vlc_atomic_timedwait(), vlc_tick_sleep(), and vlc_tick_wait().