jidctfst.cpp File Reference

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

Go to the source code of this file.

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
	GLOBAL (void) jpeg_idct_ifast(j_decompress_ptr cinfo
	for (ctr=DCTSIZE;ctr > 0;ctr--)
	for (ctr=0;ctr< DCTSIZE;ctr++)

Variables
jpeg_component_info *	compptr
jpeg_component_info JCOEFPTR	coef_block
jpeg_component_info JCOEFPTR JSAMPARRAY	output_buf
jpeg_component_info JCOEFPTR JSAMPARRAY JDIMENSION	output_col
DCTELEM	tmp10
DCTELEM	tmp11
DCTELEM	tmp12
DCTELEM	tmp13
DCTELEM	z5
DCTELEM	z10
DCTELEM	z11
DCTELEM	z12
DCTELEM	z13
JCOEFPTR	inptr = coef_block
IFAST_MULT_TYPE *	quantptr = (IFAST_MULT_TYPE*)compptr->dct_table
int *	wsptr = workspace
JSAMPROW	outptr
JSAMPLE *	range_limit = IDCT_range_limit(cinfo)
int	ctr
int	workspace [DCTSIZE2]

Macro Definition Documentation

CONST_BITS

#define CONST_BITS   8

Definition at line 50 of file jidctfst.cpp.

DEQUANTIZE

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

Definition at line 99 of file jidctfst.cpp.

Referenced by for().

DESCALE

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

Definition at line 83 of file jidctfst.cpp.

FIX_1_082392200

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

Definition at line 65 of file jidctfst.cpp.

Referenced by for().

FIX_1_414213562

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

Definition at line 66 of file jidctfst.cpp.

Referenced by for().

FIX_1_847759065

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

Definition at line 67 of file jidctfst.cpp.

Referenced by for().

FIX_2_613125930

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

Definition at line 68 of file jidctfst.cpp.

Referenced by for().

IDESCALE

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

Definition at line 129 of file jidctfst.cpp.

Referenced by for().

IRIGHT_SHIFT

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

Definition at line 123 of file jidctfst.cpp.

ISHIFT_TEMPS

#define ISHIFT_TEMPS

Definition at line 122 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 90 of file jidctfst.cpp.

Referenced by for().

PASS1_BITS

#define PASS1_BITS   2

Definition at line 51 of file jidctfst.cpp.

Referenced by for().

Function Documentation

for() [1/2]

for	(	ctr	= DCTSIZE; ctr,
		0;ctr--
	)

Definition at line 158 of file jidctfst.cpp.

References DCTSIZE, DEQUANTIZE, FIX_1_082392200, FIX_1_414213562, FIX_1_847759065, FIX_2_613125930, inptr, MULTIPLY, quantptr, tmp10, tmp11, tmp12, tmp13, wsptr, z10, z11, z12, z13, and z5.

for() [2/2]

for

(

)

Definition at line 253 of file jidctfst.cpp.

References ctr, DCTSIZE, FIX_1_082392200, FIX_1_414213562, FIX_1_847759065, FIX_2_613125930, IDESCALE, MULTIPLY, outptr, output_buf, output_col, PASS1_BITS, range_limit, RANGE_MASK, tmp10, tmp11, tmp12, tmp13, wsptr, z10, z11, z12, z13, and z5.

GLOBAL()

GLOBAL

(

void

)

Variable Documentation

coef_block

jpeg_component_info JCOEFPTR coef_block

Definition at line 137 of file jidctfst.cpp.

compptr

jpeg_component_info* compptr

Definition at line 137 of file jidctfst.cpp.

ctr

int ctr

Definition at line 148 of file jidctfst.cpp.

Referenced by for().

inptr

SHIFT_TEMPS ISHIFT_TEMPS inptr = coef_block

Definition at line 143 of file jidctfst.cpp.

Referenced by for().

outptr

JSAMPROW outptr

Definition at line 146 of file jidctfst.cpp.

Referenced by for().

output_buf

jpeg_component_info JCOEFPTR JSAMPARRAY output_buf

Definition at line 137 of file jidctfst.cpp.

Referenced by for().

output_col

jpeg_component_info JCOEFPTR JSAMPARRAY JDIMENSION output_col

Initial value:

{
        DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7

Definition at line 139 of file jidctfst.cpp.

Referenced by for().

quantptr

quantptr = (IFAST_MULT_TYPE*)compptr->dct_table

Definition at line 144 of file jidctfst.cpp.

Referenced by for().

range_limit

JSAMPLE* range_limit = IDCT_range_limit(cinfo)

Definition at line 147 of file jidctfst.cpp.

Referenced by for().

tmp10

DCTELEM tmp10

Definition at line 141 of file jidctfst.cpp.

Referenced by for().

tmp11

DCTELEM tmp11

Definition at line 141 of file jidctfst.cpp.

Referenced by for().

tmp12

DCTELEM tmp12

Definition at line 141 of file jidctfst.cpp.

Referenced by for().

tmp13

DCTELEM tmp13

Definition at line 141 of file jidctfst.cpp.

Referenced by for().

workspace

int workspace[DCTSIZE2]

Definition at line 149 of file jidctfst.cpp.

wsptr

wsptr = workspace

Definition at line 145 of file jidctfst.cpp.

Referenced by for().

z10

DCTELEM z10

Definition at line 142 of file jidctfst.cpp.

Referenced by for().

z11

DCTELEM z11

Definition at line 142 of file jidctfst.cpp.

Referenced by for().

z12

DCTELEM z12

Definition at line 142 of file jidctfst.cpp.

Referenced by for().

z13

DCTELEM z13

Definition at line 142 of file jidctfst.cpp.

Referenced by for().

z5

DCTELEM z5

Definition at line 142 of file jidctfst.cpp.

Referenced by for().