LPCContext Struct Reference

#include <lpc.h>

Data Fields
int	blocksize
int	max_order
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.
void(*	lpc_compute_autocorr )(const double *data, int len, int lag, double *autoc)
	Perform autocorrelation on input samples with delay of 0 to lag.
LLSModel	lls_models [2]

Detailed Description

Definition at line 51 of file lpc.h.

Field Documentation

int LPCContext::blocksize

Definition at line 52 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 53 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), and ff_lpc_init().

enum FFLPCType LPCContext::lpc_type

Definition at line 54 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), and ff_lpc_init().

double* LPCContext::windowed_buffer

Definition at line 55 of file lpc.h.

Referenced by ff_lpc_end(), and ff_lpc_init().

double* LPCContext::windowed_samples

Definition at line 56 of file lpc.h.

Referenced by ff_lpc_calc_coefs(), ff_lpc_calc_ref_coefs(), 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 66 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 81 of file lpc.h.

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

LLSModel LPCContext::lls_models[2]

Definition at line 85 of file lpc.h.

Referenced by ff_lpc_calc_coefs().

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

• libavcodec/lpc.h