g726.c File Reference

#include <inttypes.h>
#include <memory.h>
#include <stdlib.h>
#include "spandsp/telephony.h"
#include "spandsp/dc_restore.h"
#include "spandsp/bitstream.h"
#include "spandsp/bit_operations.h"
#include "spandsp/g711.h"
#include "spandsp/g726.h"

Functions
g726_state_t *	g726_init (g726_state_t *s, int bit_rate, int ext_coding, int packing)
int	g726_release (g726_state_t *s)
int	g726_decode (g726_state_t *s, int16_t amp[], const uint8_t g726_data[], int g726_bytes)
int	g726_encode (g726_state_t *s, uint8_t g726_data[], const int16_t amp[], int len)

---

Detailed Description

---

Function Documentation

int g726_decode (  g726_state_t *  s, int16_t  amp[], const uint8_t  g726_data[], int  g726_bytes )

Decode a buffer of G.726 ADPCM data to linear PCM, a-law or u-law. Parameters: s  The G.726 context. amp  The audio sample buffer. g726_data  g726_bytes  Returns: The number of samples returned.

int g726_encode (  g726_state_t *  s, uint8_t  g726_data[], const int16_t  amp[], int  len )

Encode a buffer of linear PCM data to G.726 ADPCM. Parameters: s  The G.726 context. g726_data  The G.726 data produced. amp  The audio sample buffer. len  The number of samples in the buffer. Returns: The number of bytes of G.726 data produced.

g726_state_t* g726_init (  g726_state_t *  s, int  bit_rate, int  ext_coding, int  packing )

Initialise a G.726 encode or decode context. Parameters: s  The G.726 context. bit_rate  The required bit rate for the ADPCM data. The valid rates are 16000, 24000, 32000 and 40000. ext_coding  The coding used outside G.726. packing  One of the G.726_PACKING_xxx options. Returns: A pointer to the G.726 context, or NULL for error.

int g726_release (  g726_state_t *  s  )

Free a G.726 encode or decode context. Parameters: s  The G.726 context. Returns: 0 for OK.

---