spandsp 0.0.6
|
Go to the source code of this file.
Typedefs | |
typedef struct oki_adpcm_state_s | oki_adpcm_state_t |
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_free (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) |
typedef struct oki_adpcm_state_s oki_adpcm_state_t |
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.
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.
s | The Oki ADPCM context. |
amp | The audio sample buffer. |
oki_data | |
oki_bytes |
References oki_adpcm_state_s::bit_rate, oki_adpcm_state_s::history, oki_adpcm_state_s::phase, and oki_adpcm_state_s::ptr.
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.
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. |
References oki_adpcm_state_s::bit_rate, oki_adpcm_state_s::history, oki_adpcm_state_s::mark, oki_adpcm_state_s::oki_byte, oki_adpcm_state_s::phase, and oki_adpcm_state_s::ptr.
int oki_adpcm_free | ( | oki_adpcm_state_t * | s | ) |
Free an Oki ADPCM encode or decode context.
s | The Oki ADPCM context. |
oki_adpcm_state_t * oki_adpcm_init | ( | oki_adpcm_state_t * | s, |
int | bit_rate ) |
Initialise an Oki ADPCM encode or decode context.
s | The Oki ADPCM context. |
bit_rate | The required bit rate for the ADPCM data. The valid rates are 24000 and 32000. |
References oki_adpcm_state_s::bit_rate.
int oki_adpcm_release | ( | oki_adpcm_state_t * | s | ) |
Release an Oki ADPCM encode or decode context.
s | The Oki ADPCM context. |