#include "jinclude.h"
#include "mrpt_jpeglib.h"
#include "jdct.h"

Include dependency graph for jidctfst.cpp:

Macros
#define	JPEG_INTERNALS

#define	CONST_BITS 8

#define	PASS1_BITS 2

#define	FIX_1_082392200 ((INT32) 277) /* FIX(1.082392200) */

#define	FIX_1_414213562 ((INT32) 362) /* FIX(1.414213562) */

#define	FIX_1_847759065 ((INT32) 473) /* FIX(1.847759065) */

#define	FIX_2_613125930 ((INT32) 669) /* FIX(2.613125930) */

#define	DESCALE(x, n) RIGHT_SHIFT(x, n)

#define	MULTIPLY(var, const) ((DCTELEM) DESCALE((var) * (const), CONST_BITS))

#define	DEQUANTIZE(coef, quantval) (((IFAST_MULT_TYPE) (coef)) * (quantval))

#define	ISHIFT_TEMPS

#define	IRIGHT_SHIFT(x, shft) ((x) >> (shft))

#define	IDESCALE(x, n) ((int) IRIGHT_SHIFT(x, n))

Functions
	jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info *compptr, JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)

Macro Definition Documentation

◆ CONST_BITS

#define CONST_BITS 8

Definition at line 52 of file jidctfst.cpp.

◆ DEQUANTIZE

#define DEQUANTIZE	(	coef,
		quantval
	)	(((IFAST_MULT_TYPE) (coef)) * (quantval))

Definition at line 104 of file jidctfst.cpp.

◆ DESCALE

#define DESCALE	(	x,
		n
	)	RIGHT_SHIFT(x, n)

Definition at line 86 of file jidctfst.cpp.

◆ FIX_1_082392200

#define FIX_1_082392200 ((INT32) 277) /* FIX(1.082392200) */

Definition at line 67 of file jidctfst.cpp.

◆ FIX_1_414213562

#define FIX_1_414213562 ((INT32) 362) /* FIX(1.414213562) */

Definition at line 68 of file jidctfst.cpp.

◆ FIX_1_847759065

#define FIX_1_847759065 ((INT32) 473) /* FIX(1.847759065) */

Definition at line 69 of file jidctfst.cpp.

◆ FIX_2_613125930

#define FIX_2_613125930 ((INT32) 669) /* FIX(2.613125930) */

Definition at line 70 of file jidctfst.cpp.

◆ IDESCALE

#define IDESCALE	(	x,
		n
	)	((int) IRIGHT_SHIFT(x, n))

Definition at line 134 of file jidctfst.cpp.

◆ IRIGHT_SHIFT

#define IRIGHT_SHIFT	(	x,
		shft
	)	((x) >> (shft))

Definition at line 128 of file jidctfst.cpp.

◆ ISHIFT_TEMPS

#define ISHIFT_TEMPS

Definition at line 127 of file jidctfst.cpp.

◆ JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 10 of file jidctfst.cpp.

◆ MULTIPLY

#define MULTIPLY	(	var,
		const
	)	((DCTELEM) DESCALE((var) * (const), CONST_BITS))

Definition at line 94 of file jidctfst.cpp.

◆ PASS1_BITS

#define PASS1_BITS 2

Definition at line 53 of file jidctfst.cpp.

Function Documentation

◆ jpeg_idct_ifast()

jpeg_idct_ifast	(	j_decompress_ptr	cinfo,
		jpeg_component_info *	compptr,
		JCOEFPTR	coef_block,
		JSAMPARRAY	output_buf,
		JDIMENSION	output_col
	)

Definition at line 143 of file jidctfst.cpp.

References coef_block, compptr, jpeg_component_info::dct_table, DCTSIZE, DCTSIZE2, DEQUANTIZE, FIX_1_082392200, FIX_1_414213562, FIX_1_847759065, FIX_2_613125930, IDCT_range_limit, IDESCALE, ISHIFT_TEMPS, MULTIPLY, output_buf, output_col, PASS1_BITS, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().

Macros

Functions