fft.h File Reference

Go to the source code of this file.

Data Structures
struct	_struct_fft_state
Defines
#define	FFT_BUFFER_SIZE_LOG   9
#define	FFT_BUFFER_SIZE   (1 << FFT_BUFFER_SIZE_LOG)
Typedefs
typedef short int	sound_sample
typedef struct _struct_fft_state	fft_state
Functions
fft_state *	visual_fft_init (void)
void	fft_perform (const sound_sample *input, float *output, fft_state *state)
void	fft_close (fft_state *state)

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Define Documentation

#define FFT_BUFFER_SIZE   (1 << FFT_BUFFER_SIZE_LOG)

Referenced by fft_calculate(), fft_output(), fft_prepare(), spectrometer_Run(), spectrum_Run(), and visual_fft_init().

#define FFT_BUFFER_SIZE_LOG   9

Referenced by fft_calculate(), and reverseBits().

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Typedef Documentation

typedef struct _struct_fft_state fft_state

typedef short int sound_sample

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Function Documentation

void fft_close

(

fft_state *

state

)

Referenced by spectrometer_Run(), and spectrum_Run().

void fft_perform	(	const sound_sample *	input,
		float *	output,
		fft_state *	state
	)

References _struct_fft_state::bitReverse, _struct_fft_state::costable, fft_calculate(), fft_output(), fft_prepare(), _struct_fft_state::imag, _struct_fft_state::real, and _struct_fft_state::sintable.

Referenced by spectrometer_Run(), and spectrum_Run().

fft_state* visual_fft_init

(

void

)

References _struct_fft_state::bitReverse, _struct_fft_state::costable, FFT_BUFFER_SIZE, i, PI, reverseBits(), and _struct_fft_state::sintable.

Referenced by spectrometer_Run(), and spectrum_Run().