fftwrap.h File Reference

#include "misc.h"

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Functions
void *	spx_fft_init (int size)
void	spx_fft_destroy (void *table)
void	spx_fft (void *table, spx_word16_t *in, spx_word16_t *out)
void	spx_ifft (void *table, spx_word16_t *in, spx_word16_t *out)
void	spx_fft_float (void *table, float *in, float *out)
void	spx_ifft_float (void *table, float *in, float *out)

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Function Documentation

void spx_fft	(	void *	table,
		spx_word16_t *	in,
		spx_word16_t *	out
	)

Forward (real to half-complex) transform

References kiss_config::forward, kiss_config::freq_data, kiss_fft_cpx::i, kiss_fftr(), kiss_config::N, and kiss_fft_cpx::r.

Referenced by speex_echo_cancel(), and spx_fft_float().

void spx_fft_destroy

(

void *

table

)

Destroy tables for an FFT

References kiss_config::backward, kiss_config::forward, kiss_config::freq_data, kiss_fftr_free, and speex_free().

Referenced by speex_echo_state_destroy().

void spx_fft_float	(	void *	table,
		float *	in,
		float *	out
	)

Forward (real to half-complex) transform of float data

References spx_fft().

void* spx_fft_init

(

int

size

)

Compute tables for an FFT

References kiss_config::backward, kiss_config::forward, kiss_config::freq_data, kiss_fftr_alloc(), kiss_config::N, NULL, and speex_alloc().

Referenced by speex_echo_state_init().

void spx_ifft	(	void *	table,
		spx_word16_t *	in,
		spx_word16_t *	out
	)

Backward (half-complex to real) transform

References kiss_config::backward, kiss_config::freq_data, kiss_fft_cpx::i, kiss_fftri(), kiss_config::N, and kiss_fft_cpx::r.

Referenced by speex_echo_cancel(), and spx_ifft_float().

void spx_ifft_float	(	void *	table,
		float *	in,
		float *	out
	)

Backward (half-complex to real) transform of float data

References spx_ifft().