fft-internal.h File Reference

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Macros
#define	SCALE_FLOAT(a, bits)   lrint((a) * (double)(1 << (bits)))
#define	ff_imdct_calc_c   FFT_NAME(ff_imdct_calc_c)
#define	ff_imdct_half_c   FFT_NAME(ff_imdct_half_c)
#define	ff_mdct_calc_c   FFT_NAME(ff_mdct_calc_c)

Functions
void	ff_imdct_calc_c (FFTContext *s, FFTSample *output, const FFTSample *input)
	Compute inverse MDCT of size N = 2^nbits. More...
void	ff_imdct_half_c (FFTContext *s, FFTSample *output, const FFTSample *input)
	Compute the middle half of the inverse MDCT of size N = 2^nbits, thus excluding the parts that can be derived by symmetry. More...
void	ff_mdct_calc_c (FFTContext *s, FFTSample *output, const FFTSample *input)
	Compute MDCT of size N = 2^nbits. More...

Macro Definition Documentation

SCALE_FLOAT

#define SCALE_FLOAT	(		a,
			bits
	)		lrint((a) * (double)(1 << (bits)))

Definition at line 39 of file fft-internal.h.

ff_imdct_calc_c

#define ff_imdct_calc_c   FFT_NAME(ff_imdct_calc_c)

Definition at line 59 of file fft-internal.h.

ff_imdct_half_c

#define ff_imdct_half_c   FFT_NAME(ff_imdct_half_c)

Definition at line 60 of file fft-internal.h.

ff_mdct_calc_c

#define ff_mdct_calc_c   FFT_NAME(ff_mdct_calc_c)

Definition at line 61 of file fft-internal.h.

Function Documentation

ff_imdct_calc_c()

void ff_imdct_calc_c	(	FFTContext *	s,
		FFTSample *	output,
		const FFTSample *	input
	)

Compute inverse MDCT of size N = 2^nbits.

Parameters

output	N samples
input	N/2 samples

Definition at line 147 of file mdct_template.c.

ff_imdct_half_c()

void ff_imdct_half_c	(	FFTContext *	s,
		FFTSample *	output,
		const FFTSample *	input
	)

Compute the middle half of the inverse MDCT of size N = 2^nbits, thus excluding the parts that can be derived by symmetry.

Parameters

output	N/2 samples
input	N/2 samples

Definition at line 105 of file mdct_template.c.

Referenced by ff_imdct_calc_c().

ff_mdct_calc_c()

void ff_mdct_calc_c	(	FFTContext *	s,
		FFTSample *	out,
		const FFTSample *	input
	)

Compute MDCT of size N = 2^nbits.

Parameters

input	N samples
out	N/2 samples

Definition at line 167 of file mdct_template.c.