non-gpl-bits/g726.h File Reference
Go to the source code of this file.
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Classes |
struct | g726_state_s |
Typedefs |
typedef int16_t(* | g726_decoder_func_t )(struct g726_state_s *s, uint8_t code) |
typedef uint8_t(* | g726_encoder_func_t )(struct g726_state_s *s, int16_t amp) |
typedef struct g726_state_s | g726_state_t |
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_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 samples) |
Detailed Description
Function Documentation
int g726_decode |
( |
g726_state_t * |
s, |
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int16_t |
amp[], |
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const uint8_t |
g726_data[], |
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int |
g726_bytes | |
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) |
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Decode a buffer of G.726 ADPCM data to linear PCM, a-law or u-law.
- Parameters:
-
| s | The G.726 context. |
| amp | |
| g726_data | |
| g726_bytes | |
- Returns:
- The number of samples returned.
int g726_encode |
( |
g726_state_t * |
s, |
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uint8_t |
g726_data[], |
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const int16_t |
amp[], |
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int |
samples | |
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) |
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Encode a buffer of linear PCM data to G.726 ADPCM.
- Parameters:
-
| s | The G.726 context. |
| g726_data | |
| amp | |
| samples | |
- Returns:
- The number of bytes of G.726 data produced.
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.
Free a G.726 encode or decode context.
- Parameters:
-
- Returns:
- 0 for OK.