ts_sc_comp.c File Reference

Scaled RTP Timestamp encoding. More...

#include "ts_sc_comp.h"
#include "rohc_traces.h"

Include dependency graph for ts_sc_comp.c:

Functions
int	c_create_sc (struct ts_sc_comp *ts_sc)
	Create the ts_sc_comp object.
void	c_destroy_sc (struct ts_sc_comp *ts_sc)
	Destroy the ts_sc_comp object.
void	c_add_ts (struct ts_sc_comp *ts_sc, unsigned int ts, unsigned int sn)
	Store the new TS, calculate new values and update the state.
int	nb_bits_scaled (struct ts_sc_comp ts_sc)
	Return the number of bits needed to encode TS_SCALED.
void	add_scaled (struct ts_sc_comp *ts_sc, int sn)
	Add a new TS_SCALED value to the ts_sc_comp object.
int	get_ts_scaled (struct ts_sc_comp ts_sc)
	Return the TS_SCALED value.
int	get_offset (struct ts_sc_comp ts_sc)
	Return the TS_OFFSET value.
int	get_ts_stride (struct ts_sc_comp ts_sc)
	Return the TS_STRIDE value.
int	is_deductible (struct ts_sc_comp ts_sc)
	Whether TimeStamp (TS) is deductible from the Sequence Number (SN) or not.
int	is_ts_constant (struct ts_sc_comp ts_sc)
	Whether TimeStamp (TS) did not change or not.

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Detailed Description

Scaled RTP Timestamp encoding.

Author:

David Moreau from TAS

Didier Barvaux <didier.barvaux@toulouse.viveris.com>

---

Function Documentation

void add_scaled	(	struct ts_sc_comp *	ts_sc,
		int	sn
	)

Add a new TS_SCALED value to the ts_sc_comp object.

Parameters:

ts_sc	The ts_sc_comp object
sn	The Sequence Number

References c_add_wlsb(), ts_sc_comp::scaled_window, and ts_sc_comp::ts_scaled.

Referenced by update_variables().

void c_add_ts	(	struct ts_sc_comp *	ts_sc,
		unsigned int	ts,
		unsigned int	sn
	)

Store the new TS, calculate new values and update the state.

Parameters:

ts_sc	The ts_sc_comp object
ts	The timestamp to add
sn	The sequence number of the RTP packet

References INIT_STRIDE, INIT_TS, ts_sc_comp::is_deductible, ts_sc_comp::old_sn, ts_sc_comp::old_ts, rohc_debugf, sdvl_can_value_be_encoded(), SEND_SCALED, ts_sc_comp::sn, sn, ts_sc_comp::state, ts_sc_comp::ts, ts_sc_comp::ts_delta, ts_sc_comp::ts_offset, ts_sc_comp::ts_scaled, and ts_sc_comp::ts_stride.

Referenced by c_generic_encode().

int c_create_sc

(

struct ts_sc_comp *

ts_sc

)

Create the ts_sc_comp object.

Parameters:

ts_sc

The ts_sc_comp object to create

Returns:

1 if creation is successful, 0 otherwise

References c_create_wlsb(), INIT_TS, ts_sc_comp::is_deductible, ts_sc_comp::old_sn, ts_sc_comp::old_ts, rohc_debugf, ts_sc_comp::scaled_window, ts_sc_comp::sn, ts_sc_comp::state, ts_sc_comp::ts, ts_sc_comp::ts_delta, ts_sc_comp::ts_offset, ts_sc_comp::ts_scaled, and ts_sc_comp::ts_stride.

Referenced by c_rtp_create().

void c_destroy_sc

(

struct ts_sc_comp *

ts_sc

)

Destroy the ts_sc_comp object.

Parameters:

ts_sc

The ts_sc_comp object to destroy

References c_destroy_wlsb(), and ts_sc_comp::scaled_window.

Referenced by c_rtp_destroy().

int get_offset

(

struct ts_sc_comp

ts_sc

)

Return the TS_OFFSET value.

Parameters:

ts_sc

The ts_sc_comp object

Returns:

The TS_OFFSET value

References ts_sc_comp::ts_offset.

int get_ts_scaled

(

struct ts_sc_comp

ts_sc

)

Return the TS_SCALED value.

Parameters:

ts_sc

The ts_sc_comp object

Returns:

The TS_SCALED value

References ts_sc_comp::ts_scaled.

Referenced by update_variables().

int get_ts_stride

(

struct ts_sc_comp

ts_sc

)

Return the TS_STRIDE value.

Parameters:

ts_sc

The ts_sc_comp object

Returns:

TS_STRIDE value

References ts_sc_comp::ts_stride.

Referenced by rtp_code_dynamic_rtp_part(), and rtp_header_flags_and_fields().

int is_deductible

(

struct ts_sc_comp

ts_sc

)

Whether TimeStamp (TS) is deductible from the Sequence Number (SN) or not.

Parameters:

ts_sc

The ts_sc_comp object

Returns:

1 if TS is deductible from SN, 0 otherwise

References ts_sc_comp::is_deductible.

Referenced by code_EXT3_packet(), code_UOR2_ID_bytes(), decide_extension(), and decide_SO_packet().

int is_ts_constant

(

struct ts_sc_comp

ts_sc

)

Whether TimeStamp (TS) did not change or not.

Parameters:

ts_sc

The ts_sc_comp object

Returns:

1 if TS did not change, 0 otherwise

References ts_sc_comp::ts_delta.

Referenced by code_EXT3_packet(), rtp_code_dynamic_rtp_part(), and rtp_decide_state().

int nb_bits_scaled

(

struct ts_sc_comp

ts_sc

)

Return the number of bits needed to encode TS_SCALED.

Parameters:

ts_sc

The ts_sc_comp object

Returns:

The number of bits needed

References c_get_k_wlsb(), ts_sc_comp::scaled_window, and ts_sc_comp::ts_scaled.

Referenced by update_variables().