VLC
3.0.21
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Data Structures | |
struct | average_t |
This structure holds long term average. More... | |
struct | clock_point_t |
struct | input_clock_t |
Macros | |
#define | CR_MAX_GAP (60 * CLOCK_FREQ) |
#define | CR_MEAN_PTS_GAP (300000) |
#define | CR_BUFFERING_RATE (48) |
#define | CR_BUFFERING_TARGET (100000) |
#define | INPUT_CLOCK_LATE_COUNT (3) |
Functions | |
static void | AvgInit (average_t *, int i_divider) |
static void | AvgClean (average_t *) |
static void | AvgReset (average_t *) |
static void | AvgUpdate (average_t *, vlc_tick_t i_value) |
static vlc_tick_t | AvgGet (average_t *) |
static void | AvgRescale (average_t *, int i_divider) |
static clock_point_t | clock_point_Create (vlc_tick_t i_stream, vlc_tick_t i_system) |
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 modfied on rate changes It ensures that currently converted dates are not changed. More... | |
input_clock_t * | input_clock_New (int i_rate) |
This function creates a new input_clock_t. More... | |
void | input_clock_Delete (input_clock_t *cl) |
This function destroys a input_clock_t created by input_clock_New. More... | |
void | input_clock_Update (input_clock_t *cl, vlc_object_t *p_log, bool *pb_late, bool b_can_pace_control, bool b_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. More... | |
void | input_clock_Reset (input_clock_t *cl) |
This function will reset the drift of a input_clock_t. More... | |
void | input_clock_ChangeRate (input_clock_t *cl, int i_rate) |
This functions allows changing the actual reading speed. More... | |
void | input_clock_ChangePause (input_clock_t *cl, bool b_paused, vlc_tick_t i_date) |
This function allows changing the pause status. More... | |
vlc_tick_t | input_clock_GetWakeup (input_clock_t *cl) |
This functions will return a deadline used to control the reading speed. More... | |
int | input_clock_ConvertTS (vlc_object_t *p_object, input_clock_t *cl, int *pi_rate, vlc_tick_t *pi_ts0, vlc_tick_t *pi_ts1, vlc_tick_t i_ts_bound) |
This function converts a pair of timestamp from stream clock to system clock. More... | |
int | input_clock_GetRate (input_clock_t *cl) |
This function returns the current rate. More... | |
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. More... | |
void | input_clock_ChangeSystemOrigin (input_clock_t *cl, bool b_absolute, vlc_tick_t i_system) |
This function allows rebasing the original system value date (a valid reference point must have been set). More... | |
void | input_clock_GetSystemOrigin (input_clock_t *cl, vlc_tick_t *pi_system, vlc_tick_t *pi_delay) |
This function returns the original system value date and the delay for the current reference point (a valid reference point must have been set). More... | |
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. More... | |
vlc_tick_t | input_clock_GetJitter (input_clock_t *cl) |
This function returns an estimation of the pts_delay needed to avoid rebufferization. More... | |
#define CR_BUFFERING_RATE (48) |
#define CR_BUFFERING_TARGET (100000) |
#define CR_MAX_GAP (60 * CLOCK_FREQ) |
#define CR_MEAN_PTS_GAP (300000) |
#define INPUT_CLOCK_LATE_COUNT (3) |
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References input_clock_t::i_pts_delay, input_clock_t::i_rate, and INPUT_RATE_DEFAULT.
Referenced by input_clock_Delete().
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Referenced by input_clock_Update().
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Referenced by input_clock_New().
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Referenced by AvgUpdate(), and input_clock_Update().
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References AvgReset(), and average_t::i_divider.
Referenced by input_clock_Update().
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Referenced by input_clock_New(), and input_clock_Update().
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It returns timestamp display offset due to ref/last modfied on rate changes It ensures that currently converted dates are not changed.
References input_clock_t::b_has_reference, input_clock_t::i_rate, clock_point_t::i_stream, clock_point_t::i_system, INPUT_RATE_DEFAULT, and input_clock_t::ref.
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Referenced by input_clock_Update().
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References input_clock_t::b_has_reference, input_clock_t::i_rate, clock_point_t::i_stream, clock_point_t::i_system, INPUT_RATE_DEFAULT, input_clock_t::ref, and VLC_TICK_INVALID.
Referenced by input_clock_Update().
void input_clock_ChangePause | ( | input_clock_t * | cl, |
bool | b_paused, | ||
vlc_tick_t | i_date | ||
) |
This function allows changing the pause status.
Referenced by EsOutProgramAdd().
void input_clock_ChangeRate | ( | input_clock_t * | cl, |
int | i_rate | ||
) |
This functions allows changing the actual reading speed.
void input_clock_ChangeSystemOrigin | ( | input_clock_t * | , |
bool | b_absolute, | ||
vlc_tick_t | i_system | ||
) |
This function allows rebasing the original system value date (a valid reference point must have been set).
When using the absolute mode, it will create a discontinuity unless called imediatly after a input_clock_Update.
Referenced by EsOutControlLocked().
int input_clock_ConvertTS | ( | vlc_object_t * | , |
input_clock_t * | , | ||
int * | pi_rate, | ||
vlc_tick_t * | pi_ts0, | ||
vlc_tick_t * | pi_ts1, | ||
vlc_tick_t | i_ts_bound | ||
) |
This function converts a pair of timestamp from stream clock to system clock.
If pi_rate is provided it will be filled with the rate value used for the conversion. p_ts0 is a pointer to a timestamp to be converted (in place) and must be non NULL. p_ts1 is a pointer to a timestamp to be converted (in place) and can be NULL.
It will return VLC_EGENERIC if i_ts_bound is not INT64_MAX and if the value *p_ts0 after conversion is not before the deadline mdate() + i_pts_delay + i_ts_bound. It will also return VLC_EGENERIC if the conversion cannot be done successfully. In this case, *p_ts0 and *p_ts1 will hold an invalid timestamp. Otherwise it will return VLC_SUCCESS.
< Unspecified error
< Unspecified error
< No error
Referenced by DecoderGetDisplayDate().
void input_clock_Delete | ( | input_clock_t * | cl | ) |
This function destroys a input_clock_t created by input_clock_New.
References AvgClean(), input_clock_t::drift, input_clock_t::lock, and vlc_mutex_destroy().
Referenced by EsOutProgramDel().
vlc_tick_t input_clock_GetJitter | ( | input_clock_t * | ) |
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.
Referenced by EsOutControlLocked().
int input_clock_GetRate | ( | input_clock_t * | cl | ) |
This function returns the current rate.
Referenced by DecoderGetDisplayRate().
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.
< Unspecified error
< No error
References input_clock_t::i_rate, input_clock_t::lock, vlc_mutex_lock(), and vlc_mutex_unlock().
void input_clock_GetSystemOrigin | ( | input_clock_t * | cl, |
vlc_tick_t * | pi_system, | ||
vlc_tick_t * | pi_delay | ||
) |
This function returns the original system value date and the delay for the current reference point (a valid reference point must have been set).
Referenced by EsOutControlLocked().
vlc_tick_t input_clock_GetWakeup | ( | input_clock_t * | cl | ) |
This functions will return a deadline used to control the reading speed.
input_clock_t* input_clock_New | ( | int | i_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_external_clock, input_clock_t::b_has_reference, input_clock_t::b_paused, 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_t::i_rate, input_clock_t::i_ts_max, INPUT_CLOCK_LATE_COUNT, input_clock_t::last, input_clock_t::late, input_clock_t::lock, input_clock_t::pi_value, input_clock_t::ref, vlc_mutex_init(), and VLC_TICK_INVALID.
Referenced by EsOutProgramAdd().
void input_clock_Reset | ( | input_clock_t * | ) |
This function will reset the drift of a input_clock_t.
The actual jitter estimation will not be reseted by it.
Referenced by EsOutControlLocked().
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.
Referenced by EsOutControlLocked(), and EsOutProgramAdd().
void input_clock_Update | ( | input_clock_t * | , |
vlc_object_t * | p_log, | ||
bool * | pb_late, | ||
bool | b_can_pace_control, | ||
bool | b_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.
b_buffering_allowed | tells if we are allowed to bufferize more data in advanced (if possible). |
References AvgGet(), AvgReset(), AvgUpdate(), input_clock_t::b_has_external_clock, input_clock_t::b_has_reference, CLOCK_FREQ, 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, clock_point_t::i_stream, input_clock_t::i_ts_max, INPUT_CLOCK_LATE_COUNT, input_clock_t::last, input_clock_t::late, input_clock_t::lock, msg_Warn, input_clock_t::pi_value, input_clock_t::ref, vlc_mutex_lock(), and VLC_TICK_INVALID.
Referenced by EsOutControlLocked().