mdct.c File Reference

Include dependency graph for mdct.c:

Functions
int	ff_mdct_init (MDCTContext *s, int nbits, int inverse)
	init MDCT or IMDCT computation.
void	ff_imdct_calc (MDCTContext *s, int32_t *output, int32_t *input)
	Compute inverse MDCT of size N = 2^nbits.
int	mdct_init_global (void)
Variables
int32_t *	tcosarray [5]
int32_t *	tsinarray [5]
int32_t	tcos0 [1024]
int32_t	tcos1 [512]
int32_t	tcos2 [256]
int32_t	tcos3 [128]
int32_t	tcos4 [64]
int32_t	tsin0 [1024]
int32_t	tsin1 [512]
int32_t	tsin2 [256]
int32_t	tsin3 [128]
int32_t	tsin4 [64]
uint16_t	revtab0 [1024]

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Function Documentation

void ff_imdct_calc	(	MDCTContext *	s,
		int32_t *	output,
		int32_t *	input
	)

Compute inverse MDCT of size N = 2^nbits.

Parameters:

	output	N samples
	input	N/2 samples
	tmp	N/2 samples

References CMUL(), MDCTContext::fft, fft_calc_unscaled(), FFTComplex::im, MDCTContext::nbits, FFTComplex::re, revtab0, MDCTContext::tcos, and MDCTContext::tsin.

Referenced by wma_decode_block().

int ff_mdct_init	(	MDCTContext *	s,
		int	nbits,
		int	inverse
	)

init MDCT or IMDCT computation.

References MDCTContext::fft, fsincos(), i, itofix32, MDCTContext::n, MDCTContext::nbits, MDCTContext::tcos, tcosarray, MDCTContext::tsin, and tsinarray.

Referenced by wma_decode_init().

int mdct_init_global

(

void

)

References fft_init_global(), i, revtab0, tcos0, tcos1, tcos2, tcos3, tcos4, tcosarray, tsin0, tsin1, tsin2, tsin3, tsin4, and tsinarray.

Referenced by wma_decode_init().

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Variable Documentation

uint16_t revtab0[1024]

Referenced by ff_imdct_calc(), and mdct_init_global().

int32_t tcos0[1024]

Referenced by mdct_init_global().

int32_t tcos1[512]

Referenced by mdct_init_global().

int32_t tcos2[256]

Referenced by mdct_init_global().

int32_t tcos3[128]

Referenced by mdct_init_global().

int32_t tcos4[64]

Referenced by mdct_init_global().

int32_t* tcosarray[5]

Referenced by ff_mdct_init(), and mdct_init_global().

int32_t tsin0[1024]

Referenced by mdct_init_global().

int32_t tsin1[512]

Referenced by mdct_init_global().

int32_t tsin2[256]

Referenced by mdct_init_global().

int32_t tsin3[128]

Referenced by mdct_init_global().

int32_t tsin4[64]

Referenced by mdct_init_global().

int32_t * tsinarray[5]

Referenced by ff_mdct_init(), and mdct_init_global().