FFmpeg: LPCContext Struct Reference

FFmpeg

LPCContext Struct Reference

#include <lpc.h>

Data Fields

enum FFLPCType lpc_type

double * windowed_buffer

double * windowed_samples

void(* lpc_apply_welch_window )(const int32_t *data, int len, double *w_data)

Apply a Welch window to an array of input samples. More...

void(* lpc_compute_autocorr )(const double *data, int len, int lag, double *autoc)

Perform autocorrelation on input samples with delay of 0 to lag. More...

LLSModel lls_models [2]

Detailed Description

Definition at line 52 of file lpc.h.

Field Documentation

int LPCContext::blocksize

Definition at line 53 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), ff_lpc_calc_ref_coefs(), and ff_lpc_init().

int LPCContext::max_order

Definition at line 54 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), and ff_lpc_init().

enum FFLPCType LPCContext::lpc_type

Definition at line 55 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), and ff_lpc_init().

double* LPCContext::windowed_buffer

Definition at line 56 of file lpc.h.

Referenced by ff_lpc_end(), and ff_lpc_init().

double* LPCContext::windowed_samples

Definition at line 57 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), ff_lpc_calc_ref_coefs(), ff_lpc_calc_ref_coefs_f(), and ff_lpc_init().

void(* LPCContext::lpc_apply_welch_window)(const int32_t *data, int len, double *w_data)

Apply a Welch window to an array of input samples.

The output samples have the same scale as the input, but are in double sample format.

Parameters: data input samples

len number of input samples

w_data output samples

Definition at line 67 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), ff_lpc_calc_ref_coefs(), ff_lpc_init(), and ff_lpc_init_x86().

void(* LPCContext::lpc_compute_autocorr)(const double *data, int len, int lag, double *autoc)

Perform autocorrelation on input samples with delay of 0 to lag.

Parameters: data input samples. constraints: no alignment needed, but must have at least lag*sizeof(double) valid bytes preceding it, and size must be at least (len+1)*sizeof(double) if data is 16-byte aligned or (len+2)*sizeof(double) if data is unaligned.

len number of input samples to process

lag maximum delay to calculate

autoc output autocorrelation coefficients. constraints: array size must be at least lag+1.

Definition at line 82 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), ff_lpc_calc_ref_coefs(), ff_lpc_calc_ref_coefs_f(), ff_lpc_init(), and ff_lpc_init_x86().

LLSModel LPCContext::lls_models[2]

Definition at line 86 of file lpc.h.

Referenced by ff_lpc_calc_coefs().

The documentation for this struct was generated from the following file:

libavcodec/lpc.h

Generated on Fri Jan 12 2018 01:46:26 for FFmpeg by doxygen 1.8.6