spandsp 0.0.6
|
Go to the source code of this file.
Typedefs | |
typedef struct g726_state_s | g726_state_t |
typedef int16_t(* | g726_decoder_func_t) (g726_state_t *s, uint8_t code) |
typedef uint8_t(* | g726_encoder_func_t) (g726_state_t *s, int16_t amp) |
Enumerations | |
enum | { G726_ENCODING_LINEAR = 0 , G726_ENCODING_ULAW , G726_ENCODING_ALAW } |
enum | { G726_PACKING_NONE = 0 , G726_PACKING_LEFT = 1 , G726_PACKING_RIGHT = 2 } |
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_free (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) |
typedef struct g726_state_s g726_state_t |
G.726 state
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.
s | The G.726 context. |
amp | The audio sample buffer. |
g726_data | |
g726_bytes |
References g726_state_s::bits_per_sample, bitstream_state_s::bitstream, g726_state_s::bs, g726_state_s::dec_func, g726_state_s::ext_coding, g726_state_s::packing, and bitstream_state_s::residue.
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.
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. |
References g726_state_s::bits_per_sample, bitstream_state_s::bitstream, g726_state_s::bs, g726_state_s::enc_func, g726_state_s::ext_coding, g726_state_s::packing, and bitstream_state_s::residue.
int g726_free | ( | g726_state_t * | s | ) |
Free a G.726 encode or decode context.
s | The G.726 context. |
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.
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. |
References g726_state_s::a, g726_state_s::ap, g726_state_s::b, g726_state_s::bits_per_sample, bitstream_init(), g726_state_s::bs, g726_state_s::dec_func, g726_state_s::dml, g726_state_s::dms, g726_state_s::dq, g726_state_s::enc_func, g726_state_s::ext_coding, g726_state_s::packing, g726_state_s::pk, g726_state_s::rate, g726_state_s::sr, g726_state_s::td, g726_state_s::yl, and g726_state_s::yu.
int g726_release | ( | g726_state_t * | s | ) |
Release a G.726 encode or decode context.
s | The G.726 context. |