CELPFContext Struct Reference

#include <celp_filters.h>

Data Fields
void(*	celp_lp_synthesis_filterf )(float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)
	LP synthesis filter.
void(*	celp_lp_zero_synthesis_filterf )(float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)
	LP zero synthesis filter.

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Detailed Description

Definition at line 28 of file celp_filters.h.

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Field Documentation

void(* CELPFContext::celp_lp_synthesis_filterf)(float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)

LP synthesis filter.

Parameters:

[out]	out	pointer to output buffer the array out[-filter_length, -1] must contain the previous result of this filter
	filter_coeffs	filter coefficients.
	in	input signal
	buffer_length	amount of data to process
	filter_length	filter length (10 for 10th order LP filter). Must be greater than 4 and even.

Note:

Output buffer must contain filter_length samples of past speech data before pointer.

Routine applies 1/A(z) filter to given speech data.

Referenced by ff_celp_filter_init(), ff_celp_filter_init_mips(), hb_synthesis(), postfilter(), synthesis(), and tilt_factor().

void(* CELPFContext::celp_lp_zero_synthesis_filterf)(float *out, const float *filter_coeffs, const float *in, int buffer_length, int filter_length)

LP zero synthesis filter.

Parameters:

[out]	out	pointer to output buffer
	filter_coeffs	filter coefficients.
	in	input signal the array in[-filter_length, -1] must contain the previous input of this filter
	buffer_length	amount of data to process (should be a multiple of eight)
	filter_length	filter length (10 for 10th order LP filter; should be a multiple of two)

Note:

Output buffer must contain filter_length samples of past speech data before pointer.

Routine applies A(z) filter to given speech data.

Referenced by ff_celp_filter_init(), ff_celp_filter_init_mips(), and postfilter().

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

• libavcodec/celp_filters.h