dct.h File Reference

Discrete Cosine Transform (DCT) matrix generation and planning. More...

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Data Structures
struct	dct_plan_16

Macros
#define	DCT_MATRIX_SIZE_MAX   42 /* Max matrix size where cos() argument fits Q7.24 */

Enumerations
enum	dct_type { DCT_I = 0 , DCT_II }

Functions
int	mod_dct_initialize_16 (struct processing_module *mod, struct dct_plan_16 *dct)
	Initialize a 16-bit Discrete Cosine Transform plan and compute transform matrix.
int	mod_dct_free_16 (struct processing_module *mod, struct dct_plan_16 *dct)
	Free memory allocated for a 16-bit DCT plan matrix.

Detailed Description

Discrete Cosine Transform (DCT) matrix generation and planning.

Macro Definition Documentation

DCT_MATRIX_SIZE_MAX

#define DCT_MATRIX_SIZE_MAX   42 /* Max matrix size where cos() argument fits Q7.24 */

Enumeration Type Documentation

dct_type

enum dct_type

Enumerator
DCT_I
DCT_II

Function Documentation

mod_dct_free_16()

int mod_dct_free_16	(	struct processing_module *	mod,
		struct dct_plan_16 *	dct
	)

Free memory allocated for a 16-bit DCT plan matrix.

Parameters

mod	Processing module owning the plan.
dct	Pointer to DCT plan structure to free.

Returns

0 on success, negative error code on failure.

mod_dct_initialize_16()

int mod_dct_initialize_16	(	struct processing_module *	mod,
		struct dct_plan_16 *	dct
	)

Initialize a 16-bit Discrete Cosine Transform plan and compute transform matrix.

Parameters

mod	Processing module requesting the plan (for memory allocation).
dct	Pointer to DCT plan configuration structure.

Returns

0 on success, negative error code on failure.