avfft.h File Reference

FFT functions. More...

Go to the source code of this file.

Data Structures
struct	FFTComplex

Typedefs
typedef float	FFTSample
typedef struct FFTContext	FFTContext
typedef struct RDFTContext	RDFTContext
typedef struct DCTContext	DCTContext

Enumerations
enum	RDFTransformType { DFT_R2C , IDFT_C2R , IDFT_R2C , DFT_C2R }
enum	DCTTransformType { DCT_II = 0 , DCT_III , DCT_I , DST_I }

Functions
FFTContext *	av_fft_init (int nbits, int inverse)
	Set up a complex FFT. More...
void	av_fft_permute (FFTContext *s, FFTComplex *z)
	Do the permutation needed BEFORE calling ff_fft_calc(). More...
void	av_fft_calc (FFTContext *s, FFTComplex *z)
	Do a complex FFT with the parameters defined in av_fft_init(). More...
void	av_fft_end (FFTContext *s)
FFTContext *	av_mdct_init (int nbits, int inverse, double scale)
void	av_imdct_calc (FFTContext *s, FFTSample *output, const FFTSample *input)
void	av_imdct_half (FFTContext *s, FFTSample *output, const FFTSample *input)
void	av_mdct_calc (FFTContext *s, FFTSample *output, const FFTSample *input)
void	av_mdct_end (FFTContext *s)
RDFTContext *	av_rdft_init (int nbits, enum RDFTransformType trans)
	Set up a real FFT. More...
void	av_rdft_calc (RDFTContext *s, FFTSample *data)
void	av_rdft_end (RDFTContext *s)
DCTContext *	av_dct_init (int nbits, enum DCTTransformType type)
	Set up DCT. More...
void	av_dct_calc (DCTContext *s, FFTSample *data)
void	av_dct_end (DCTContext *s)

Detailed Description

FFT functions.

Definition in file avfft.h.