#include <stddef.h>
#include <stdint.h>
#include "libavutil/intreadwrite.h"
#include "dct.h"
#include "idctdsp.h"

Macros
#define	EIGHT_BIT_SAMPLES

#define	DCTSIZE 8

#define	DCTSIZE2 64

#define	GLOBAL

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

#define	CONST_BITS 13

#define	PASS1_BITS 2

#define	ONE ((int32_t) 1)

#define	CONST_SCALE (ONE << CONST_BITS)

#define	FIX(x) ((int32_t) ((x) * CONST_SCALE + 0.5))

#define	DESCALE(x, n) RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)

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

#define	FIX_0_211164243 1730

#define	FIX_0_275899380 2260

#define	FIX_0_298631336 2446

#define	FIX_0_390180644 3196

#define	FIX_0_509795579 4176

#define	FIX_0_541196100 4433

#define	FIX_0_601344887 4926

#define	FIX_0_765366865 6270

#define	FIX_0_785694958 6436

#define	FIX_0_899976223 7373

#define	FIX_1_061594337 8697

#define	FIX_1_111140466 9102

#define	FIX_1_175875602 9633

#define	FIX_1_306562965 10703

#define	FIX_1_387039845 11363

#define	FIX_1_451774981 11893

#define	FIX_1_501321110 12299

#define	FIX_1_662939225 13623

#define	FIX_1_847759065 15137

#define	FIX_1_961570560 16069

#define	FIX_2_053119869 16819

#define	FIX_2_172734803 17799

#define	FIX_2_562915447 20995

#define	FIX_3_072711026 25172

#define	DCTSIZE 4

#define	DCTSTRIDE 8

Typedefs
typedef int16_t	DCTBLOCK[DCTSIZE2]

Functions
void	ff_j_rev_dct (DCTBLOCK data)

void	ff_j_rev_dct4 (DCTBLOCK data)

void	ff_j_rev_dct2 (DCTBLOCK data)

void	ff_j_rev_dct1 (DCTBLOCK data)

void	ff_jref_idct_put (uint8_t dest, ptrdiff_t line_size, int16_t block)

void	ff_jref_idct_add (uint8_t dest, ptrdiff_t line_size, int16_t block)

Detailed Description

Independent JPEG Group's LLM idct.

Definition in file jrevdct.c.

Macro Definition Documentation

◆ EIGHT_BIT_SAMPLES

#define EIGHT_BIT_SAMPLES

Definition at line 73 of file jrevdct.c.

◆ DCTSIZE [1/2]

#define DCTSIZE 8

Definition at line 950 of file jrevdct.c.

◆ DCTSIZE2

#define DCTSIZE2 64

Definition at line 76 of file jrevdct.c.

◆ GLOBAL

#define GLOBAL

Definition at line 78 of file jrevdct.c.

◆ RIGHT_SHIFT

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

Definition at line 80 of file jrevdct.c.

◆ CONST_BITS

#define CONST_BITS 13

Definition at line 84 of file jrevdct.c.

◆ PASS1_BITS

#define PASS1_BITS 2

Definition at line 132 of file jrevdct.c.

◆ ONE

#define ONE ((int32_t) 1)

Definition at line 137 of file jrevdct.c.

◆ CONST_SCALE

#define CONST_SCALE (ONE << CONST_BITS)

Definition at line 139 of file jrevdct.c.

◆ FIX

#define FIX ( x ) ((int32_t) ((x) * CONST_SCALE + 0.5))

Definition at line 148 of file jrevdct.c.

◆ DESCALE

#define DESCALE	(	x,
		n
	)	RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)

Definition at line 155 of file jrevdct.c.

◆ MULTIPLY

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

Definition at line 178 of file jrevdct.c.

◆ FIX_0_211164243

#define FIX_0_211164243 1730

Definition at line 186 of file jrevdct.c.

◆ FIX_0_275899380

#define FIX_0_275899380 2260

Definition at line 187 of file jrevdct.c.

◆ FIX_0_298631336

#define FIX_0_298631336 2446

Definition at line 188 of file jrevdct.c.

◆ FIX_0_390180644

#define FIX_0_390180644 3196

Definition at line 189 of file jrevdct.c.

◆ FIX_0_509795579

#define FIX_0_509795579 4176

Definition at line 190 of file jrevdct.c.

◆ FIX_0_541196100

#define FIX_0_541196100 4433

Definition at line 191 of file jrevdct.c.

◆ FIX_0_601344887

#define FIX_0_601344887 4926

Definition at line 192 of file jrevdct.c.

◆ FIX_0_765366865

#define FIX_0_765366865 6270

Definition at line 193 of file jrevdct.c.

◆ FIX_0_785694958

#define FIX_0_785694958 6436

Definition at line 194 of file jrevdct.c.

◆ FIX_0_899976223

#define FIX_0_899976223 7373

Definition at line 195 of file jrevdct.c.

◆ FIX_1_061594337

#define FIX_1_061594337 8697

Definition at line 196 of file jrevdct.c.

◆ FIX_1_111140466

#define FIX_1_111140466 9102

Definition at line 197 of file jrevdct.c.

◆ FIX_1_175875602

#define FIX_1_175875602 9633

Definition at line 198 of file jrevdct.c.

◆ FIX_1_306562965

#define FIX_1_306562965 10703

Definition at line 199 of file jrevdct.c.

◆ FIX_1_387039845

#define FIX_1_387039845 11363

Definition at line 200 of file jrevdct.c.

◆ FIX_1_451774981

#define FIX_1_451774981 11893

Definition at line 201 of file jrevdct.c.

◆ FIX_1_501321110

#define FIX_1_501321110 12299

Definition at line 202 of file jrevdct.c.

◆ FIX_1_662939225

#define FIX_1_662939225 13623

Definition at line 203 of file jrevdct.c.

◆ FIX_1_847759065

#define FIX_1_847759065 15137

Definition at line 204 of file jrevdct.c.

◆ FIX_1_961570560

#define FIX_1_961570560 16069

Definition at line 205 of file jrevdct.c.

◆ FIX_2_053119869

#define FIX_2_053119869 16819

Definition at line 206 of file jrevdct.c.

◆ FIX_2_172734803

#define FIX_2_172734803 17799

Definition at line 207 of file jrevdct.c.

◆ FIX_2_562915447

#define FIX_2_562915447 20995

Definition at line 208 of file jrevdct.c.

◆ FIX_3_072711026

#define FIX_3_072711026 25172

Definition at line 209 of file jrevdct.c.

◆ DCTSIZE [2/2]

#define DCTSIZE 4

Definition at line 950 of file jrevdct.c.

◆ DCTSTRIDE

#define DCTSTRIDE 8

Definition at line 951 of file jrevdct.c.

Typedef Documentation

◆ DCTBLOCK

typedef int16_t DCTBLOCK[DCTSIZE2]

Definition at line 82 of file jrevdct.c.

Function Documentation

◆ ff_j_rev_dct()

void ff_j_rev_dct ( DCTBLOCK data )

Definition at line 215 of file jrevdct.c.

Referenced by ff_jref_idct_add(), and ff_jref_idct_put().

◆ ff_j_rev_dct4()

void ff_j_rev_dct4 ( DCTBLOCK data )

Definition at line 953 of file jrevdct.c.

◆ ff_j_rev_dct2()

void ff_j_rev_dct2 ( DCTBLOCK data )

Definition at line 1140 of file jrevdct.c.

◆ ff_j_rev_dct1()

void ff_j_rev_dct1 ( DCTBLOCK data )

Definition at line 1155 of file jrevdct.c.

◆ ff_jref_idct_put()

void ff_jref_idct_put	(	uint8_t *	dest,
		ptrdiff_t	line_size,
		int16_t *	block
	)

Definition at line 1162 of file jrevdct.c.

Referenced by ff_idctdsp_init().

◆ ff_jref_idct_add()

void ff_jref_idct_add	(	uint8_t *	dest,
		ptrdiff_t	line_size,
		int16_t *	block
	)

Definition at line 1168 of file jrevdct.c.