oki_adpcm_state_s Struct Reference

#include <oki_adpcm.h>

Public Attributes
int	bit_rate
	The bit rate - 24000 or 32000.
int16_t	last
	The last state of the ADPCM algorithm.
int16_t	step_index
	Current index into the step size table.
uint8_t	oki_byte
	The compressed data byte in progress.
int16_t	history [32]
	The signal history for the sample rate converter.
int	ptr
	Pointer into the history buffer.
int	mark
	Odd/even sample counter.
int	phase
	Phase accumulator for the sample rate converter.

Detailed Description

Oki (Dialogic) ADPCM conversion state descriptor. This defines the state of a single working instance of the Oki ADPCM converter. This is used for either linear to ADPCM or ADPCM to linear conversion.

Member Data Documentation

bit_rate

int oki_adpcm_state_s::bit_rate

The bit rate - 24000 or 32000.

Referenced by oki_adpcm_decode(), oki_adpcm_encode(), and oki_adpcm_init().

history

int16_t oki_adpcm_state_s::history[32]

The signal history for the sample rate converter.

Referenced by oki_adpcm_decode(), and oki_adpcm_encode().

mark

int oki_adpcm_state_s::mark

Odd/even sample counter.

Referenced by oki_adpcm_encode().

oki_byte

uint8_t oki_adpcm_state_s::oki_byte

The compressed data byte in progress.

Referenced by oki_adpcm_encode().

phase

int oki_adpcm_state_s::phase

Phase accumulator for the sample rate converter.

Referenced by oki_adpcm_decode(), and oki_adpcm_encode().

ptr

int oki_adpcm_state_s::ptr

Pointer into the history buffer.

Referenced by oki_adpcm_decode(), and oki_adpcm_encode().

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The documentation for this struct was generated from the following file:

• private/oki_adpcm.h