jidctred.cpp File Reference

Main MRPT website > C++ reference for MRPT 1.9.9

#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 13

#define	PASS1_BITS 2

#define	FIX_0_211164243 ((INT32)1730) /* FIX(0.211164243) */

#define	FIX_0_509795579 ((INT32)4176) /* FIX(0.509795579) */

#define	FIX_0_601344887 ((INT32)4926) /* FIX(0.601344887) */

#define	FIX_0_720959822 ((INT32)5906) /* FIX(0.720959822) */

#define	FIX_0_765366865 ((INT32)6270) /* FIX(0.765366865) */

#define	FIX_0_850430095 ((INT32)6967) /* FIX(0.850430095) */

#define	FIX_0_899976223 ((INT32)7373) /* FIX(0.899976223) */

#define	FIX_1_061594337 ((INT32)8697) /* FIX(1.061594337) */

#define	FIX_1_272758580 ((INT32)10426) /* FIX(1.272758580) */

#define	FIX_1_451774981 ((INT32)11893) /* FIX(1.451774981) */

#define	FIX_1_847759065 ((INT32)15137) /* FIX(1.847759065) */

#define	FIX_2_172734803 ((INT32)17799) /* FIX(2.172734803) */

#define	FIX_2_562915447 ((INT32)20995) /* FIX(2.562915447) */

#define	FIX_3_624509785 ((INT32)29692) /* FIX(3.624509785) */

#define	MULTIPLY(var, const) MULTIPLY16C16(var, const)

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

Functions
	GLOBAL (void) jpeg_idct_4x4(j_decompress_ptr cinfo

	for (ctr=DCTSIZE;ctr > 0;inptr++, quantptr++, wsptr++, ctr--)

	for (ctr=0;ctr< 4;ctr++)

	jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info *compptr, JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)

	jpeg_idct_1x1 (j_decompress_ptr cinfo, jpeg_component_info *compptr, JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)

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

INT32	z1

INT32	z2

INT32	z3

INT32	z4

JCOEFPTR	inptr = coef_block

ISLOW_MULT_TYPE *	quantptr = (ISLOW_MULT_TYPE*)compptr->dct_table

int *	wsptr = workspace

JSAMPROW	outptr

JSAMPLE *	range_limit = IDCT_range_limit(cinfo)

int	ctr

int	workspace [DCTSIZE *4]

Macro Definition Documentation

◆ CONST_BITS

#define CONST_BITS 13

Definition at line 28 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

◆ DEQUANTIZE

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

Definition at line 92 of file jidctred.cpp.

Referenced by for(), jpeg_idct_1x1(), and jpeg_idct_2x2().

◆ FIX_0_211164243

#define FIX_0_211164243 ((INT32)1730) /* FIX(0.211164243) */

Definition at line 43 of file jidctred.cpp.

Referenced by for().

◆ FIX_0_509795579

#define FIX_0_509795579 ((INT32)4176) /* FIX(0.509795579) */

Definition at line 44 of file jidctred.cpp.

Referenced by for().

◆ FIX_0_601344887

#define FIX_0_601344887 ((INT32)4926) /* FIX(0.601344887) */

Definition at line 45 of file jidctred.cpp.

Referenced by for().

◆ FIX_0_720959822

#define FIX_0_720959822 ((INT32)5906) /* FIX(0.720959822) */

Definition at line 46 of file jidctred.cpp.

Referenced by jpeg_idct_2x2().

◆ FIX_0_765366865

#define FIX_0_765366865 ((INT32)6270) /* FIX(0.765366865) */

Definition at line 47 of file jidctred.cpp.

Referenced by for().

◆ FIX_0_850430095

#define FIX_0_850430095 ((INT32)6967) /* FIX(0.850430095) */

Definition at line 48 of file jidctred.cpp.

Referenced by jpeg_idct_2x2().

◆ FIX_0_899976223

#define FIX_0_899976223 ((INT32)7373) /* FIX(0.899976223) */

Definition at line 49 of file jidctred.cpp.

Referenced by for().

◆ FIX_1_061594337

#define FIX_1_061594337 ((INT32)8697) /* FIX(1.061594337) */

Definition at line 50 of file jidctred.cpp.

Referenced by for().

◆ FIX_1_272758580

#define FIX_1_272758580 ((INT32)10426) /* FIX(1.272758580) */

Definition at line 51 of file jidctred.cpp.

Referenced by jpeg_idct_2x2().

◆ FIX_1_451774981

#define FIX_1_451774981 ((INT32)11893) /* FIX(1.451774981) */

Definition at line 52 of file jidctred.cpp.

Referenced by for().

◆ FIX_1_847759065

#define FIX_1_847759065 ((INT32)15137) /* FIX(1.847759065) */

Definition at line 53 of file jidctred.cpp.

Referenced by for().

◆ FIX_2_172734803

#define FIX_2_172734803 ((INT32)17799) /* FIX(2.172734803) */

Definition at line 54 of file jidctred.cpp.

Referenced by for().

◆ FIX_2_562915447

#define FIX_2_562915447 ((INT32)20995) /* FIX(2.562915447) */

Definition at line 55 of file jidctred.cpp.

Referenced by for().

◆ FIX_3_624509785

#define FIX_3_624509785 ((INT32)29692) /* FIX(3.624509785) */

Definition at line 56 of file jidctred.cpp.

Referenced by jpeg_idct_2x2().

◆ JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 10 of file jidctred.cpp.

◆ MULTIPLY

#define MULTIPLY	(		var,
			const
	)		MULTIPLY16C16(var, const)

Definition at line 82 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

◆ PASS1_BITS

#define PASS1_BITS 2

Definition at line 29 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

Function Documentation

◆ for() [1/2]

for	(	ctr	= `DCTSIZE; ctr`,
		0;inptr++	,
		quantptr++	,
		wsptr++	,
		ctr--
	)

Definition at line 119 of file jidctred.cpp.

References CONST_BITS, ctr, DCTSIZE, DEQUANTIZE, DESCALE, FIX_0_211164243, FIX_0_509795579, FIX_0_601344887, FIX_0_765366865, FIX_0_899976223, FIX_1_061594337, FIX_1_451774981, FIX_1_847759065, FIX_2_172734803, FIX_2_562915447, inptr, MULTIPLY, PASS1_BITS, quantptr, tmp10, tmp12, wsptr, z1, z2, z3, and z4.

Referenced by jpeg_idct_2x2().

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◆ for() [2/2]

for ( )

Definition at line 184 of file jidctred.cpp.

References CONST_BITS, ctr, DCTSIZE, DESCALE, FIX_0_211164243, FIX_0_509795579, FIX_0_601344887, FIX_0_765366865, FIX_0_899976223, FIX_1_061594337, FIX_1_451774981, FIX_1_847759065, FIX_2_172734803, FIX_2_562915447, MULTIPLY, outptr, output_buf, output_col, PASS1_BITS, range_limit, RANGE_MASK, tmp10, tmp12, wsptr, z1, z2, z3, and z4.

◆ GLOBAL()

GLOBAL ( void )

◆ jpeg_idct_1x1()

jpeg_idct_1x1	(	j_decompress_ptr	cinfo,
		jpeg_component_info *	compptr,
		JCOEFPTR	coef_block,
		JSAMPARRAY	output_buf,
		JDIMENSION	output_col
	)

Definition at line 390 of file jidctred.cpp.

References coef_block, compptr, jpeg_component_info::dct_table, DEQUANTIZE, DESCALE, IDCT_range_limit, output_buf, output_col, quantptr, range_limit, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().

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◆ jpeg_idct_2x2()

jpeg_idct_2x2	(	j_decompress_ptr	cinfo,
		jpeg_component_info *	compptr,
		JCOEFPTR	coef_block,
		JSAMPARRAY	output_buf,
		JDIMENSION	output_col
	)

Definition at line 264 of file jidctred.cpp.

References coef_block, compptr, CONST_BITS, ctr, jpeg_component_info::dct_table, DCTSIZE, DEQUANTIZE, DESCALE, FIX_0_720959822, FIX_0_850430095, FIX_1_272758580, FIX_3_624509785, for(), IDCT_range_limit, inptr, MULTIPLY, outptr, output_buf, output_col, PASS1_BITS, quantptr, range_limit, RANGE_MASK, SHIFT_TEMPS, tmp10, workspace, wsptr, and z1.

Referenced by start_pass().

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Variable Documentation

◆ coef_block

jpeg_component_info JCOEFPTR coef_block

Definition at line 100 of file jidctred.cpp.

Referenced by jpeg_idct_1x1(), and jpeg_idct_2x2().

◆ compptr

jpeg_component_info* compptr

Definition at line 100 of file jidctred.cpp.

Referenced by jpeg_idct_1x1(), and jpeg_idct_2x2().

◆ ctr

int ctr

Definition at line 110 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

◆ inptr

SHIFT_TEMPS inptr = coef_block

Definition at line 105 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

◆ outptr

JSAMPROW outptr

Definition at line 108 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

◆ output_buf

jpeg_component_info JCOEFPTR JSAMPARRAY output_buf

Definition at line 100 of file jidctred.cpp.

Referenced by for(), jpeg_idct_1x1(), and jpeg_idct_2x2().

◆ output_col

jpeg_component_info JCOEFPTR JSAMPARRAY JDIMENSION output_col

Initial value:

{

INT32 tmp0, tmp2, tmp10, tmp12

FAST_FLOAT tmp12

Definition: jidctflt.cpp:40

long INT32

Definition: jmorecfg.h:151

FAST_FLOAT tmp10

Definition: jidctflt.cpp:40

Definition at line 102 of file jidctred.cpp.

Referenced by for(), jpeg_idct_1x1(), and jpeg_idct_2x2().

◆ quantptr

quantptr = (ISLOW_MULT_TYPE*)compptr->dct_table

Definition at line 106 of file jidctred.cpp.

Referenced by for(), jpeg_idct_1x1(), and jpeg_idct_2x2().

◆ range_limit

JSAMPLE* range_limit = IDCT_range_limit(cinfo)

Definition at line 109 of file jidctred.cpp.

Referenced by for(), jpeg_idct_1x1(), and jpeg_idct_2x2().

◆ workspace

int workspace[DCTSIZE *4]

Definition at line 111 of file jidctred.cpp.

Referenced by jpeg_idct_2x2().

◆ wsptr

wsptr = workspace

Definition at line 107 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

◆ z1

Definition at line 104 of file jidctred.cpp.

Referenced by for(), and jpeg_idct_2x2().

◆ z2

Definition at line 104 of file jidctred.cpp.

Referenced by for().

◆ z3

Definition at line 104 of file jidctred.cpp.

Referenced by for().

◆ z4

Definition at line 104 of file jidctred.cpp.

Referenced by for().

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