jidctred.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_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
	jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info *compptr, JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col)
	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)

Macro Definition Documentation

CONST_BITS

#define CONST_BITS   13

Definition at line 43 of file jidctred.c.

Referenced by jpeg_idct_2x2(), and jpeg_idct_4x4().

DEQUANTIZE

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

Definition at line 109 of file jidctred.c.

Referenced by jpeg_idct_1x1(), jpeg_idct_2x2(), and jpeg_idct_4x4().

FIX_0_211164243

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

Definition at line 58 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_0_509795579

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

Definition at line 59 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_0_601344887

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

Definition at line 60 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_0_720959822

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

Definition at line 61 of file jidctred.c.

Referenced by jpeg_idct_2x2().

FIX_0_765366865

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

Definition at line 62 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_0_850430095

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

Definition at line 63 of file jidctred.c.

Referenced by jpeg_idct_2x2().

FIX_0_899976223

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

Definition at line 64 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_1_061594337

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

Definition at line 65 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_1_272758580

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

Definition at line 66 of file jidctred.c.

Referenced by jpeg_idct_2x2().

FIX_1_451774981

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

Definition at line 67 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_1_847759065

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

Definition at line 68 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_2_172734803

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

Definition at line 69 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_2_562915447

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

Definition at line 70 of file jidctred.c.

Referenced by jpeg_idct_4x4().

FIX_3_624509785

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

Definition at line 71 of file jidctred.c.

Referenced by jpeg_idct_2x2().

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 23 of file jidctred.c.

MULTIPLY

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

Definition at line 98 of file jidctred.c.

Referenced by jpeg_idct_2x2(), and jpeg_idct_4x4().

PASS1_BITS

#define PASS1_BITS   2

Definition at line 44 of file jidctred.c.

Referenced by jpeg_idct_2x2(), and jpeg_idct_4x4().

Function Documentation

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 379 of file jidctred.c.

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

Referenced by start_pass().

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 271 of file jidctred.c.

References coef_block, compptr, CONST_BITS, jpeg_component_info::dct_table, DCTSIZE, DEQUANTIZE, DESCALE, FIX_0_720959822, FIX_0_850430095, FIX_1_272758580, FIX_3_624509785, for(), GLOBAL, IDCT_range_limit, int, MULTIPLY, output_buf, output_col, PASS1_BITS, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().

jpeg_idct_4x4()

jpeg_idct_4x4	(	j_decompress_ptr	cinfo,
		jpeg_component_info *	compptr,
		JCOEFPTR	coef_block,
		JSAMPARRAY	output_buf,
		JDIMENSION	output_col
	)

Definition at line 118 of file jidctred.c.

References coef_block, CONST_BITS, jpeg_component_info::dct_table, 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, for(), GLOBAL, IDCT_range_limit, int, MULTIPLY, output_col, PASS1_BITS, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().