lpc_functions.h File Reference

#include "libavutil/avassert.h"

Go to the source code of this file.

Macros
#define	LPC_USE_FIXED   0
#define	LPC_SRA_R(x, y)
#define	LPC_MUL26(x, y)
#define	LPC_FIXR(x)

Typedefs
typedef float	LPC_TYPE
typedef float	LPC_TYPE_U

Functions
static int	compute_lpc_coefs (const LPC_TYPE *autoc, int i, int max_order, LPC_TYPE *lpc, int lpc_stride, int fail, int normalize, LPC_TYPE *err_ptr)
	Levinson-Durbin recursion.

Macro Definition Documentation

LPC_USE_FIXED

#define LPC_USE_FIXED   0

Definition at line 28 of file lpc_functions.h.

Referenced by compute_ref_coefs().

LPC_SRA_R

#define LPC_SRA_R	(		x,
			y )

Value:

(x)

Definition at line 36 of file lpc_functions.h.

Referenced by compute_lpc_coefs().

LPC_MUL26

#define LPC_MUL26	(		x,
			y )

Value:

((x) * (y))

Definition at line 37 of file lpc_functions.h.

Referenced by compute_lpc_coefs().

LPC_FIXR

#define LPC_FIXR

(

x

)

Value:

((float)(x))

Definition at line 38 of file lpc_functions.h.

Referenced by compute_lpc_coefs().

Typedef Documentation

LPC_TYPE

typedef float LPC_TYPE

Definition at line 45 of file lpc_functions.h.

LPC_TYPE_U

typedef float LPC_TYPE_U

Definition at line 46 of file lpc_functions.h.

Function Documentation

compute_lpc_coefs()

static int compute_lpc_coefs ( const LPC_TYPE * autoc, int i, int max_order, LPC_TYPE * lpc, int lpc_stride, int fail, int normalize, LPC_TYPE * err_ptr )

inlinestatic

Levinson-Durbin recursion.

Produce LPC coefficients from autocorrelation data.

Definition at line 54 of file lpc_functions.h.

Referenced by apply_tns(), backward_filter(), decode_frame(), ff_aac_apply_tns(), ff_aac_search_for_tns(), ff_lpc_calc_coefs(), and search_for_tns_short_pooled().