adx.h File Reference

Go to the source code of this file.

Data Structures
struct	ADXChannelState
struct	ADXContext

Macros
#define	MAX_CHANNELS   6
#define	COEFF_BITS   12
#define	BLOCK_SIZE   18
#define	BLOCK_SAMPLES   32

Functions
void	ff_adx_calculate_coeffs (int cutoff, int sample_rate, int bits, int *coeff)
	Calculate LPC coefficients based on cutoff frequency and sample rate. More...

Detailed Description

SEGA CRI adx codecs.

Reference documents: http://ku-www.ss.titech.ac.jp/~yatsushi/adx.html adx2wav & wav2adx http://www.geocities.co.jp/Playtown/2004/

Definition in file adx.h.

Macro Definition Documentation

MAX_CHANNELS

#define MAX_CHANNELS   6

Definition at line 38 of file adx.h.

COEFF_BITS

#define COEFF_BITS   12

Definition at line 49 of file adx.h.

BLOCK_SIZE

#define BLOCK_SIZE   18

Definition at line 51 of file adx.h.

BLOCK_SAMPLES

#define BLOCK_SAMPLES   32

Definition at line 52 of file adx.h.

Function Documentation

ff_adx_calculate_coeffs()

void ff_adx_calculate_coeffs	(	int	cutoff,
		int	sample_rate,
		int	bits,
		int *	coeff
	)

Calculate LPC coefficients based on cutoff frequency and sample rate.

Parameters

	cutoff	cutoff frequency
	sample_rate	sample rate
	bits	number of bits used to quantize coefficients
[out]	coeff	2 quantized LPC coefficients

Definition at line 25 of file adx.c.

Referenced by adx_decode_header(), and adx_encode_init().