spandsp 0.0.6
g722.h File Reference

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Typedefs

typedef struct g722_encode_state_s g722_encode_state_t
 
typedef struct g722_decode_state_s g722_decode_state_t
 

Enumerations

enum  { G722_SAMPLE_RATE_8000 = 0x0001 , G722_PACKED = 0x0002 }
 

Functions

g722_encode_state_tg722_encode_init (g722_encode_state_t *s, int rate, int options)
 
int g722_encode_release (g722_encode_state_t *s)
 
int g722_encode_free (g722_encode_state_t *s)
 
int g722_encode (g722_encode_state_t *s, uint8_t g722_data[], const int16_t amp[], int len)
 
g722_decode_state_tg722_decode_init (g722_decode_state_t *s, int rate, int options)
 
int g722_decode_release (g722_decode_state_t *s)
 
int g722_decode_free (g722_decode_state_t *s)
 
int g722_decode (g722_decode_state_t *s, int16_t amp[], const uint8_t g722_data[], int len)
 

Typedef Documentation

◆ g722_decode_state_t

G.722 decode state

◆ g722_encode_state_t

G.722 encode state

Function Documentation

◆ g722_decode()

int g722_decode ( g722_decode_state_t s,
int16_t  amp[],
const uint8_t  g722_data[],
int  len 
)

Decode a buffer of G.722 data to linear PCM.

Parameters
sThe G.722 context.
ampThe audio sample buffer.
g722_data
len
Returns
The number of samples returned.

◆ g722_decode_free()

int g722_decode_free ( g722_decode_state_t s)

Free a G.722 decode context.

Parameters
sThe G.722 decode context.
Returns
0 for OK.

◆ g722_decode_init()

g722_decode_state_t * g722_decode_init ( g722_decode_state_t s,
int  rate,
int  options 
)

Initialise an G.722 decode context.

Parameters
sThe G.722 decode context.
rateThe bit rate of the G.722 data. The valid rates are 64000, 56000 and 48000.
options
Returns
A pointer to the G.722 decode context, or NULL for error.

◆ g722_decode_release()

int g722_decode_release ( g722_decode_state_t s)

Release a G.722 decode context.

Parameters
sThe G.722 decode context.
Returns
0 for OK.

◆ g722_encode()

int g722_encode ( g722_encode_state_t s,
uint8_t  g722_data[],
const int16_t  amp[],
int  len 
)

Encode a buffer of linear PCM data to G.722

Parameters
sThe G.722 context.
g722_dataThe G.722 data produced.
ampThe audio sample buffer.
lenThe number of samples in the buffer.
Returns
The number of bytes of G.722 data produced.

◆ g722_encode_free()

int g722_encode_free ( g722_encode_state_t s)

Free a G.722 encode context.

Parameters
sThe G.722 encode context.
Returns
0 for OK.

◆ g722_encode_init()

g722_encode_state_t * g722_encode_init ( g722_encode_state_t s,
int  rate,
int  options 
)

Initialise an G.722 encode context.

Parameters
sThe G.722 encode context.
rateThe required bit rate for the G.722 data. The valid rates are 64000, 56000 and 48000.
options
Returns
A pointer to the G.722 encode context, or NULL for error.

◆ g722_encode_release()

int g722_encode_release ( g722_encode_state_t s)

Release a G.722 encode context.

Parameters
sThe G.722 encode context.
Returns
0 for OK.