oki_adpcm.h File Reference

Go to the source code of this file.

Classes
struct	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_to_linear (oki_adpcm_state_t *s, int16_t *amp, const uint8_t *oki_data, int oki_bytes)
int	oki_linear_to_adpcm (oki_adpcm_state_t *s, uint8_t *oki_data, const int16_t *amp, int samples)

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Detailed Description

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Function Documentation

oki_adpcm_state_t* oki_adpcm_init	(	oki_adpcm_state_t *	s,
		int	bit_rate
	)

Initialise an Oki ADPCM encode or decode context.

Parameters:

	s	The Oki ADPCM context.
	bit_rate	The required bit rate for the ADPCM data. The valid rates are 24000 and 32000.

Returns:

A pointer to the Oki ADPCM context, or NULL for error.

int oki_adpcm_release

(

oki_adpcm_state_t *

s

)

Free an Oki ADPCM encode or decode context.

Parameters:

s

The Oki ADPCM context.

Returns:

0 for OK.

int oki_adpcm_to_linear	(	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.

Parameters:

	s	The Oki ADPCM context.
	amp
	oki_data
	oki_bytes

Returns:

The number of samples returned.

int oki_linear_to_adpcm	(	oki_adpcm_state_t *	s,
		uint8_t *	oki_data,
		const int16_t *	amp,
		int	samples
	)

Encode a buffer of linear PCM data to Oki ADPCM.

Parameters:

	s	The Oki ADPCM context.
	oki_data
	amp
	samples

Returns:

The number of bytes of Oki ADPCM data produced.

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