imdct.h File Reference

Exported symbols from imdct.c. More...

Functions
int	imdct_init (int nbits, struct mdct_context **result)
	Initialize the inverse modified cosine transform. More...
void	imdct (struct mdct_context *s, float *output, const float *input)
	Compute the inverse MDCT. More...
void	imdct_end (struct mdct_context *s)
	Deallocate imdct resources. More...

Detailed Description

Exported symbols from imdct.c.

Function Documentation

imdct_init()

int imdct_init	(	int	nbits,
		struct mdct_context **	result
	)

Initialize the inverse modified cosine transform.

Parameters

nbits	The number of bits to use (4 <= nbits <= 18).
result	Opaque structure that must be passed to imdct().

Returns

Standard.

References arr_alloc(), and zalloc().

imdct()

void imdct	(	struct mdct_context *	ctx,
		float *	output,
		const float *	input
	)

Compute the inverse MDCT.

Parameters

ctx	The initialized context structure.
output	N samples.
input	N/2 samples.

See also

imdct_init().

imdct_end()

void imdct_end

(

struct mdct_context *

ctx

)

Deallocate imdct resources.

Parameters

ctx	The pointer obtained by imdct_init().