FFmpeg: libavcodec/lpc_functions.h File Reference

FFmpeg

[フレーム]

libavcodec

Macros | Typedefs | Functions

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) (x)

#define LPC_MUL26(x, y) ((x) * (y))

#define LPC_FIXR(x) ((float)(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. More...

Macro Definition Documentation

◆ LPC_USE_FIXED

#define LPC_USE_FIXED 0

Definition at line 28 of file lpc_functions.h.

◆ LPC_SRA_R

#define LPC_SRA_R ( x,

) (x)

Definition at line 36 of file lpc_functions.h.

◆ LPC_MUL26

#define LPC_MUL26 ( x,

) ((x) * (y))

Definition at line 37 of file lpc_functions.h.

◆ LPC_FIXR

#define LPC_FIXR ( x ) ((float)(x))

Definition at line 38 of file lpc_functions.h.

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(), and ff_lpc_calc_coefs().

Generated on Tue Nov 18 2025 19:23:56 for FFmpeg by doxygen 1.8.17