Include dependency graph for input_clock.c:

Data Structures
struct	input_clock_t
	This structure is used to manage clock drift and reception jitters. More...

Macros
#define	CR_MEAN_PTS_GAP VLC_TICK_FROM_MS(300)

#define	CR_MAX_GAP CR_MEAN_PTS_GAP

#define	CR_BUFFERING_RATE (48)

#define	CR_BUFFERING_TARGET VLC_TICK_FROM_MS(100)

#define	INPUT_CLOCK_LATE_COUNT (3)

Functions
static vlc_tick_t	ClockStreamToSystem (input_clock_t *, vlc_tick_t i_stream)

static vlc_tick_t	ClockSystemToStream (input_clock_t *, vlc_tick_t i_system)

static vlc_tick_t	ClockGetTsOffset (input_clock_t *cl)
	It returns timestamp display offset due to ref/last modified on rate changes It ensures that currently converted dates are not changed.

static void	UpdateListener (input_clock_t *cl, bool discontinuity)

input_clock_t *	input_clock_New (float rate)
	This function creates a new input_clock_t.

void	input_clock_Delete (input_clock_t *cl)
	This function destroys a input_clock_t created by input_clock_New.

void	input_clock_AttachListener (input_clock_t cl, const struct vlc_input_clock_cbs cbs, void *opaque)
	This function attach a clock listener to the input clock.

vlc_tick_t	input_clock_Update (input_clock_t cl, vlc_object_t p_log, bool b_can_pace_control, bool b_buffering, bool b_extra_buffering_allowed, vlc_tick_t i_ck_stream, vlc_tick_t i_ck_system)
	This function will update a input_clock_t with a new clock reference point.

void	input_clock_Reset (input_clock_t *cl)
	This function will reset the drift of a input_clock_t.

void	input_clock_ChangeRate (input_clock_t *cl, float rate)
	This functions allows changing the actual reading speed.

void	input_clock_ChangePause (input_clock_t *cl, bool b_paused, vlc_tick_t i_date)
	This function allows changing the pause status.

vlc_tick_t	input_clock_GetWakeup (input_clock_t *cl)
	This functions will return a deadline used to control the reading speed.

float	input_clock_GetRate (input_clock_t *cl)
	This function returns the current rate.

int	input_clock_GetState (input_clock_t cl, vlc_tick_t pi_stream_start, vlc_tick_t pi_system_start, vlc_tick_t pi_stream_duration, vlc_tick_t *pi_system_duration)
	This function returns current clock state or VLC_EGENERIC if there is not a reference point.

void	input_clock_ChangeSystemOrigin (input_clock_t *cl, vlc_tick_t i_system)
	This function allows rebasing the original system value date (a valid reference point must have been set).

void	input_clock_SetJitter (input_clock_t *cl, vlc_tick_t i_pts_delay, int i_cr_average)
	This function allows the set the minimal configuration for the jitter estimation algo.

vlc_tick_t	input_clock_GetJitter (input_clock_t *cl)
	This function returns an estimation of the pts_delay needed to avoid rebufferization.

Macro Definition Documentation

◆ CR_BUFFERING_RATE

#define CR_BUFFERING_RATE (48)

◆ CR_BUFFERING_TARGET

#define CR_BUFFERING_TARGET VLC_TICK_FROM_MS(100)

◆ CR_MAX_GAP

#define CR_MAX_GAP CR_MEAN_PTS_GAP

◆ CR_MEAN_PTS_GAP

#define CR_MEAN_PTS_GAP VLC_TICK_FROM_MS(300)

◆ INPUT_CLOCK_LATE_COUNT

#define INPUT_CLOCK_LATE_COUNT (3)

Function Documentation

◆ ClockGetTsOffset()

static vlc_tick_t ClockGetTsOffset ( input_clock_t * cl )

static

It returns timestamp display offset due to ref/last modified on rate changes It ensures that currently converted dates are not changed.

References input_clock_t::i_pts_delay, and input_clock_t::rate.

Referenced by input_clock_ChangeSystemOrigin(), and UpdateListener().

◆ ClockStreamToSystem()

static vlc_tick_t ClockStreamToSystem	(	input_clock_t *	cl,
		vlc_tick_t	i_stream
	)

static

References input_clock_t::b_has_reference, input_clock_t::rate, input_clock_t::ref, clock_point_t::stream, clock_point_t::system, and VLC_TICK_INVALID.

Referenced by input_clock_GetWakeup(), input_clock_Update(), and UpdateListener().

◆ ClockSystemToStream()

static vlc_tick_t ClockSystemToStream	(	input_clock_t *	cl,
		vlc_tick_t	i_system
	)

static

References input_clock_t::b_has_reference, input_clock_t::rate, input_clock_t::ref, clock_point_t::stream, and clock_point_t::system.

Referenced by input_clock_Update().

◆ input_clock_AttachListener()

void input_clock_AttachListener	(	input_clock_t *	clock,
		const struct vlc_input_clock_cbs *	clock_listener,
		void *	opaque
	)

This function attach a clock listener to the input clock.

It can be called only one time, with a valid clock, before the first update (input_clock_Update()).

Parameters

clock	the input clock to attach the listener to
listener	an input clock listener virtual table
opaque	an opaque pointer forwarded to the listener

References input_clock_t::b_has_reference, input_clock_t::cbs, input_clock_t::listener, and input_clock_t::opaque.

Referenced by EsOutProgramHandleClockSource().

◆ input_clock_ChangePause()

void input_clock_ChangePause	(	input_clock_t *	cl,
		bool	b_paused,
		vlc_tick_t	i_date
	)

This function allows changing the pause status.

References input_clock_t::b_has_reference, input_clock_t::b_paused, input_clock_t::i_pause_date, input_clock_t::last, input_clock_t::ref, clock_point_t::system, and UpdateListener().

Referenced by EsOutProgramAdd(), and EsOutProgramChangePause().

◆ input_clock_ChangeRate()

void input_clock_ChangeRate	(	input_clock_t *	cl,
		float	rate
	)

This functions allows changing the actual reading speed.

References input_clock_t::b_has_reference, input_clock_t::last, input_clock_t::rate, input_clock_t::ref, clock_point_t::system, and UpdateListener().

Referenced by EsOutProgramsChangeRate().

◆ input_clock_ChangeSystemOrigin()

void input_clock_ChangeSystemOrigin	(	input_clock_t *	cl,
		vlc_tick_t	i_system
	)

This function allows rebasing the original system value date (a valid reference point must have been set).

References input_clock_t::b_has_reference, input_clock_t::b_origin_changed, ClockGetTsOffset(), input_clock_t::last, input_clock_t::ref, clock_point_t::system, and UpdateListener().

Referenced by EsOutDecodersStopBuffering().

◆ input_clock_Delete()

void input_clock_Delete ( input_clock_t * cl )

This function destroys a input_clock_t created by input_clock_New.

References AvgClean(), and input_clock_t::drift.

Referenced by ProgramDelete().

◆ input_clock_GetJitter()

vlc_tick_t input_clock_GetJitter ( input_clock_t * cl )

This function returns an estimation of the pts_delay needed to avoid rebufferization.

XXX in the current implementation, the pts_delay will never be decreased.

References input_clock_t::i_pts_delay, INPUT_CLOCK_LATE_COUNT, input_clock_t::late, p, and input_clock_t::pi_value.

Referenced by EsOutVaControlLocked().

◆ input_clock_GetRate()

float input_clock_GetRate ( input_clock_t * cl )

This function returns the current rate.

References input_clock_t::rate.

◆ input_clock_GetState()

int input_clock_GetState	(	input_clock_t *	cl,
		vlc_tick_t *	pi_stream_start,
		vlc_tick_t *	pi_system_start,
		vlc_tick_t *	pi_stream_duration,
		vlc_tick_t *	pi_system_duration
	)

This function returns current clock state or VLC_EGENERIC if there is not a reference point.

References input_clock_t::b_has_reference, input_clock_t::last, input_clock_t::ref, clock_point_t::stream, clock_point_t::system, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by EsOutChangePause(), EsOutDecodersStopBuffering(), and EsOutGetBuffering().

◆ input_clock_GetWakeup()

vlc_tick_t input_clock_GetWakeup ( input_clock_t * cl )

This functions will return a deadline used to control the reading speed.

References AvgGet(), input_clock_t::b_has_reference, ClockStreamToSystem(), input_clock_t::drift, input_clock_t::i_buffering_duration, input_clock_t::last, and clock_point_t::stream.

Referenced by EsOutGetWakeup().

◆ input_clock_New()

input_clock_t * input_clock_New ( float rate )

This function creates a new input_clock_t.

You must use input_clock_Delete to delete it once unused.

References AvgInit(), input_clock_t::b_has_reference, input_clock_t::b_origin_changed, input_clock_t::b_paused, input_clock_t::cbs, clock_point_Create(), input_clock_t::drift, input_clock_t::i_buffering_duration, input_clock_t::i_index, input_clock_t::i_next_drift_update, input_clock_t::i_pause_date, input_clock_t::i_pts_delay, INPUT_CLOCK_LATE_COUNT, input_clock_t::last, input_clock_t::late, input_clock_t::listener, input_clock_t::opaque, input_clock_t::pi_value, input_clock_t::rate, input_clock_t::ref, and VLC_TICK_INVALID.

Referenced by EsOutProgramAdd().

◆ input_clock_Reset()

void input_clock_Reset ( input_clock_t * cl )

This function will reset the drift of a input_clock_t.

The actual jitter estimation will not be reset by it.

References input_clock_t::b_has_reference, input_clock_t::b_origin_changed, input_clock_t::cbs, clock_point_Create(), input_clock_t::last, input_clock_t::listener, input_clock_t::opaque, input_clock_t::ref, vlc_input_clock_cbs::reset, and VLC_TICK_INVALID.

Referenced by EsOutChangePosition().

◆ input_clock_SetJitter()

void input_clock_SetJitter	(	input_clock_t *	cl,
		vlc_tick_t	i_pts_delay,
		int	i_cr_average
	)

This function allows the set the minimal configuration for the jitter estimation algo.

References AvgRescale(), input_clock_t::drift, input_clock_t::i_index, input_clock_t::i_pts_delay, INPUT_CLOCK_LATE_COUNT, input_clock_t::late, input_clock_t::pi_value, and average_t::range.

Referenced by EsOutProgramAdd(), and EsOutVaPrivControlLocked().

◆ input_clock_Update()

vlc_tick_t input_clock_Update	(	input_clock_t *	clock,
		vlc_object_t *	p_log,
		bool	b_can_pace_control,
		bool	b_buffering,
		bool	b_extra_buffering_allowed,
		vlc_tick_t	i_clock,
		vlc_tick_t	i_system
	)

This function will update a input_clock_t with a new clock reference point.

It will also tell if the clock point is late regarding our buffering.

Parameters

clock	the input clock object to update with the new point
p_log	the logger object to use
b_can_pace_control	whether the input can control the speed of playback
b_buffering	whether the input is buffering
b_extra_buffering_allowed	tells if we are allowed to bufferize more data in advance (if possible).
i_clock	the new clock reference value
i_system	the timestmap at which the new reference has been reported

Returns: clock update delay

References AvgGet(), AvgReset(), AvgUpdate(), input_clock_t::b_has_reference, input_clock_t::b_origin_changed, clock_point_Create(), ClockStreamToSystem(), ClockSystemToStream(), CR_BUFFERING_RATE, CR_BUFFERING_TARGET, CR_MAX_GAP, CR_MEAN_PTS_GAP, input_clock_t::drift, input_clock_t::i_buffering_duration, input_clock_t::i_index, input_clock_t::i_next_drift_update, input_clock_t::i_pts_delay, INPUT_CLOCK_LATE_COUNT, input_clock_t::last, input_clock_t::late, msg_Warn, input_clock_t::pi_value, input_clock_t::rate, input_clock_t::ref, clock_point_t::stream, clock_point_t::system, UpdateListener(), VLC_TICK_FROM_MS, and VLC_TICK_INVALID.

Referenced by EsOutVaControlLocked().

◆ UpdateListener()

static void UpdateListener	(	input_clock_t *	cl,
		bool	discontinuity
	)

static

References AvgGet(), input_clock_t::cbs, ClockGetTsOffset(), ClockStreamToSystem(), input_clock_t::drift, input_clock_t::i_pts_delay, input_clock_t::last, input_clock_t::listener, input_clock_t::opaque, input_clock_t::rate, clock_point_t::stream, and vlc_input_clock_cbs::update.

Referenced by input_clock_ChangePause(), input_clock_ChangeRate(), input_clock_ChangeSystemOrigin(), and input_clock_Update().

Data Structures

Macros

Functions

Macro Definition Documentation

◆ CR_BUFFERING_RATE

◆ CR_BUFFERING_TARGET

◆ CR_MAX_GAP

◆ CR_MEAN_PTS_GAP

◆ INPUT_CLOCK_LATE_COUNT

Function Documentation

◆ ClockGetTsOffset()

◆ ClockStreamToSystem()

◆ ClockSystemToStream()

◆ input_clock_AttachListener()

◆ input_clock_ChangePause()

◆ input_clock_ChangeRate()

◆ input_clock_ChangeSystemOrigin()

◆ input_clock_Delete()

◆ input_clock_GetJitter()

◆ input_clock_GetRate()

◆ input_clock_GetState()

◆ input_clock_GetWakeup()

◆ input_clock_New()

◆ input_clock_Reset()

◆ input_clock_SetJitter()

◆ input_clock_Update()

◆ UpdateListener()