oki_adpcm.c File Reference

#include <stdlib.h>
#include <inttypes.h>
#include <string.h>
#include "spandsp/telephony.h"
#include "spandsp/oki_adpcm.h"

Functions
oki_adpcm_state_t *	oki_adpcm_init (oki_adpcm_state_t *s, int bit_rate)
int	oki_adpcm_release (oki_adpcm_state_t *s)
int	oki_adpcm_decode (oki_adpcm_state_t *s, int16_t amp[], const uint8_t oki_data[], int oki_bytes)
int	oki_adpcm_encode (oki_adpcm_state_t *s, uint8_t oki_data[], const int16_t amp[], int len)

---

Detailed Description

---

Function Documentation

int oki_adpcm_decode (  oki_adpcm_state_t *  s, int16_t  amp[], const uint8_t  oki_data[], int  oki_bytes )

Decode a buffer of Oki ADPCM data to linear PCM. Parameters: s  The Oki ADPCM context. amp  The audio sample buffer. oki_data  oki_bytes  Returns: The number of samples returned.

int oki_adpcm_encode (  oki_adpcm_state_t *  s, uint8_t  oki_data[], const int16_t  amp[], int  len )

Encode a buffer of linear PCM data to Oki ADPCM. Parameters: s  The Oki ADPCM context. oki_data  The Oki ADPCM data produced amp  The audio sample buffer. len  The number of samples in the buffer. Returns: The number of bytes of Oki ADPCM data produced.

oki_adpcm_state_t* oki_adpcm_init (  oki_adpcm_state_t *  s, int  bit_rate )

Initialise an Oki ADPCM encode or decode context. Parameters: s  The Oki ADPCM context. bit_rate  The required bit rate for the ADPCM data. The valid rates are 24000 and 32000. Returns: A pointer to the Oki ADPCM context, or NULL for error.

int oki_adpcm_release (  oki_adpcm_state_t *  s  )

Free an Oki ADPCM encode or decode context. Parameters: s  The Oki ADPCM context. Returns: 0 for OK.

---