Scaled RTP Timestamp decoding. More...

#include "rohc_traces.h"
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include "dllexport.h"
#include "config.h"

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Functions
struct ts_sc_decomp *ROHC_EXPORT	d_create_sc (rohc_trace_callback_t trace_cb, rohc_trace_callback2_t trace_cb2, void *const trace_cb_priv)
	Create the scaled RTP Timestamp decoding context.
void ROHC_EXPORT	rohc_ts_scaled_free (struct ts_sc_decomp *const ts_scaled)
	Destroy the given ts_sc_decomp object.
void ROHC_EXPORT	ts_update_context (struct ts_sc_decomp *const ts_sc, const uint32_t ts, const uint16_t sn)
	Store a new timestamp.
void ROHC_EXPORT	d_record_ts_stride (struct ts_sc_decomp *const ts_sc, const uint32_t ts_stride)
	Store the newly-parsed TS_STRIDE value.
bool ROHC_EXPORT	ts_decode_unscaled_bits (struct ts_sc_decomp const ts_sc, const uint32_t ts_unscaled_bits, const size_t ts_unscaled_bits_nr, uint32_t const decoded_ts, const bool compat_1_6_x)
	Decode timestamp (TS) value with some LSB bits of the unscaled value.
bool ROHC_EXPORT	ts_decode_scaled_bits (struct ts_sc_decomp const ts_sc, const uint32_t ts_scaled_bits, const size_t ts_scaled_bits_nr, uint32_t const decoded_ts)
	Decode timestamp (TS) value with some LSB bits of the TS_SCALED value.
uint32_t ROHC_EXPORT	ts_deduce_from_sn (struct ts_sc_decomp *const ts_sc, const uint16_t sn)
	Deduct timestamp (TS) from Sequence Number (SN)

Detailed Description

Scaled RTP Timestamp decoding.

Author:: David Moreau from TAS; Didier Barvaux <didier@barvaux.org>

Function Documentation

struct ts_sc_decomp* ROHC_EXPORT d_create_sc	(	rohc_trace_callback_t	trace_cb,
		rohc_trace_callback2_t	trace_cb2,
		void *const	trace_cb_priv
	)		`[read]`

Create the scaled RTP Timestamp decoding context.

Parameters:

trace_cb	The old trace callback
trace_cb2	The new trace callback
trace_cb_priv	An optional private context for the trace

Returns:: The scaled RTP Timestamp decoding context in case of success, NULL otherwise

void ROHC_EXPORT d_record_ts_stride	(	struct ts_sc_decomp *const	ts_sc,
		const uint32_t	ts_stride
	)

Store the newly-parsed TS_STRIDE value.

Parameters:

ts_sc	The ts_sc_decomp object
ts_stride	The TS_STRIDE value to add

void ROHC_EXPORT rohc_ts_scaled_free ( struct ts_sc_decomp *const ts_sc )

Destroy the given ts_sc_decomp object.

Parameters:

ts_sc The ts_sc_decomp object to destroy

bool ROHC_EXPORT ts_decode_scaled_bits	(	struct ts_sc_decomp *const	ts_sc,
		const uint32_t	ts_scaled_bits,
		const size_t	ts_scaled_bits_nr,
		uint32_t *const	decoded_ts
	)

Decode timestamp (TS) value with some LSB bits of the TS_SCALED value.

Use the given TS and TS_SCALED bits. Use the TS_STRIDE and TS_OFFSET values found in context.

Parameters:

ts_sc	The ts_sc_decomp object
ts_scaled_bits	The W-LSB-encoded TS_SCALED value
ts_scaled_bits_nr	The number of bits of TS_SCALED (W-LSB)
decoded_ts	OUT: The decoded TS

Returns:: true in case of success, false otherwise

bool ROHC_EXPORT ts_decode_unscaled_bits	(	struct ts_sc_decomp *const	ts_sc,
		const uint32_t	ts_unscaled_bits,
		const size_t	ts_unscaled_bits_nr,
		uint32_t *const	decoded_ts,
		const bool	compat_1_6_x
	)

Decode timestamp (TS) value with some LSB bits of the unscaled value.

Use the given unscaled TS bits. If the TS_STRIDE value was updated by the current packet, compute new TS_SCALED and TS_OFFSET values from the new TS_STRIDE value.

Parameters:

ts_sc	The ts_sc_decomp object
ts_unscaled_bits	The W-LSB-encoded TS value
ts_unscaled_bits_nr	The number of bits of TS_SCALED (W-LSB)
decoded_ts	OUT: The decoded TS
compat_1_6_x	Keep the behaviour of <= 1.6.x versions

Returns:: true in case of success, false otherwise

uint32_t ROHC_EXPORT ts_deduce_from_sn	(	struct ts_sc_decomp *const	ts_sc,
		const uint16_t	sn
	)

Deduct timestamp (TS) from Sequence Number (SN)

Use the given SN bits to compute the new TS_SCALED value. Use the TS_STRIDE and TS_OFFSET values found in context.

Parameters:

ts_sc	The ts_sc_decomp object
sn	The SN

Returns:: The decoded TS

void ROHC_EXPORT ts_update_context	(	struct ts_sc_decomp *const	ts_sc,
		const uint32_t	ts,
		const uint16_t	sn
	)

Store a new timestamp.

Parameters:

ts_sc	The ts_sc_decomp object
ts	The new decoded TimeStamp (TS)
sn	The new decoded Sequence Number (SN)

Functions

Detailed Description

Function Documentation