jidctred.c File Reference

#include "jinclude.h"
#include "jpeglib.h"
#include "jdct.h"

Include dependency graph for jidctred.c:

Go to the source code of this file.

Defines
#define	JPEG_INTERNALS
#define	CONST_BITS   13
#define	PASS1_BITS   2
#define	FIX_0_211164243   FIX(0.211164243)
#define	FIX_0_509795579   FIX(0.509795579)
#define	FIX_0_601344887   FIX(0.601344887)
#define	FIX_0_720959822   FIX(0.720959822)
#define	FIX_0_765366865   FIX(0.765366865)
#define	FIX_0_850430095   FIX(0.850430095)
#define	FIX_0_899976223   FIX(0.899976223)
#define	FIX_1_061594337   FIX(1.061594337)
#define	FIX_1_272758580   FIX(1.272758580)
#define	FIX_1_451774981   FIX(1.451774981)
#define	FIX_1_847759065   FIX(1.847759065)
#define	FIX_2_172734803   FIX(2.172734803)
#define	FIX_2_562915447   FIX(2.562915447)
#define	FIX_3_624509785   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)

---

Define Documentation

#define CONST_BITS   13

Definition at line 43 of file jidctred.c.

Referenced by jpeg_idct_2x2(), and jpeg_idct_4x4().

#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().

#define FIX_0_211164243   FIX(0.211164243)

Definition at line 73 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_0_509795579   FIX(0.509795579)

Definition at line 74 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_0_601344887   FIX(0.601344887)

Definition at line 75 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_0_720959822   FIX(0.720959822)

Definition at line 76 of file jidctred.c.

Referenced by jpeg_idct_2x2().

#define FIX_0_765366865   FIX(0.765366865)

Definition at line 77 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_0_850430095   FIX(0.850430095)

Definition at line 78 of file jidctred.c.

Referenced by jpeg_idct_2x2().

#define FIX_0_899976223   FIX(0.899976223)

Definition at line 79 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_1_061594337   FIX(1.061594337)

Definition at line 80 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_1_272758580   FIX(1.272758580)

Definition at line 81 of file jidctred.c.

Referenced by jpeg_idct_2x2().

#define FIX_1_451774981   FIX(1.451774981)

Definition at line 82 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_1_847759065   FIX(1.847759065)

Definition at line 83 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_2_172734803   FIX(2.172734803)

Definition at line 84 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_2_562915447   FIX(2.562915447)

Definition at line 85 of file jidctred.c.

Referenced by jpeg_idct_4x4().

#define FIX_3_624509785   FIX(3.624509785)

Definition at line 86 of file jidctred.c.

Referenced by jpeg_idct_2x2().

#define JPEG_INTERNALS

Definition at line 23 of file jidctred.c.

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

Definition at line 98 of file jidctred.c.

Referenced by jpeg_idct_2x2(), and jpeg_idct_4x4().

#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	(	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 DEQUANTIZE, DESCALE, IDCT_range_limit, int, output_col, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().

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, CONST_BITS, jpeg_component_info::dct_table, DCTSIZE, DEQUANTIZE, DESCALE, FIX_0_720959822, FIX_0_850430095, FIX_1_272758580, FIX_3_624509785, IDCT_range_limit, int, MULTIPLY, output_col, PASS1_BITS, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().

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, IDCT_range_limit, int, MULTIPLY, output_col, PASS1_BITS, RANGE_MASK, and SHIFT_TEMPS.

Referenced by start_pass().