jidctint.c File Reference

#include "jinclude.h"
#include "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_298631336   ((INT32) 2446) /* FIX(0.298631336) */
#define	FIX_0_390180644   ((INT32) 3196) /* FIX(0.390180644) */
#define	FIX_0_541196100   ((INT32) 4433) /* FIX(0.541196100) */
#define	FIX_0_765366865   ((INT32) 6270) /* FIX(0.765366865) */
#define	FIX_0_899976223   ((INT32) 7373) /* FIX(0.899976223) */
#define	FIX_1_175875602   ((INT32) 9633) /* FIX(1.175875602) */
#define	FIX_1_501321110   ((INT32) 12299) /* FIX(1.501321110) */
#define	FIX_1_847759065   ((INT32) 15137) /* FIX(1.847759065) */
#define	FIX_1_961570560   ((INT32) 16069) /* FIX(1.961570560) */
#define	FIX_2_053119869   ((INT32) 16819) /* FIX(2.053119869) */
#define	FIX_2_562915447   ((INT32) 20995) /* FIX(2.562915447) */
#define	FIX_3_072711026   ((INT32) 25172) /* FIX(3.072711026) */
#define	MULTIPLY(var, const)   MULTIPLY16C16(var,const)
#define	DEQUANTIZE(coef, quantval)   (((ISLOW_MULT_TYPE) (coef)) * (quantval))

Functions
	jpeg_idct_islow (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   13

Definition at line 78 of file jidctint.c.

Referenced by jpeg_idct_islow().

DEQUANTIZE

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

Definition at line 140 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_0_298631336

#define FIX_0_298631336   ((INT32) 2446) /* FIX(0.298631336) */

Definition at line 93 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_0_390180644

#define FIX_0_390180644   ((INT32) 3196) /* FIX(0.390180644) */

Definition at line 94 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_0_541196100

#define FIX_0_541196100   ((INT32) 4433) /* FIX(0.541196100) */

Definition at line 95 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_0_765366865

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

Definition at line 96 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_0_899976223

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

Definition at line 97 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_1_175875602

#define FIX_1_175875602   ((INT32) 9633) /* FIX(1.175875602) */

Definition at line 98 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_1_501321110

#define FIX_1_501321110   ((INT32) 12299) /* FIX(1.501321110) */

Definition at line 99 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_1_847759065

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

Definition at line 100 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_1_961570560

#define FIX_1_961570560   ((INT32) 16069) /* FIX(1.961570560) */

Definition at line 101 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_2_053119869

#define FIX_2_053119869   ((INT32) 16819) /* FIX(2.053119869) */

Definition at line 102 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_2_562915447

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

Definition at line 103 of file jidctint.c.

Referenced by jpeg_idct_islow().

FIX_3_072711026

#define FIX_3_072711026   ((INT32) 25172) /* FIX(3.072711026) */

Definition at line 104 of file jidctint.c.

Referenced by jpeg_idct_islow().

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 28 of file jidctint.c.

MULTIPLY

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

Definition at line 129 of file jidctint.c.

Referenced by jpeg_idct_islow().

PASS1_BITS

#define PASS1_BITS   2

Definition at line 79 of file jidctint.c.

Referenced by jpeg_idct_islow().

Function Documentation

jpeg_idct_islow()

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

Definition at line 148 of file jidctint.c.

References coef_block, CONST_BITS, jpeg_component_info::dct_table, DCTSIZE, DCTSIZE2, DEQUANTIZE, DESCALE, FIX_0_298631336, FIX_0_390180644, FIX_0_541196100, FIX_0_765366865, FIX_0_899976223, FIX_1_175875602, FIX_1_501321110, FIX_1_847759065, FIX_1_961570560, FIX_2_053119869, FIX_2_562915447, FIX_3_072711026, for(), IDCT_range_limit, int, MULTIPLY, output_col, PASS1_BITS, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().