Independent JPEG Group's LLM idct. More...

#include "libavutil/common.h"
#include "dct.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)

Detailed Description

Independent JPEG Group's LLM idct.

Definition in file jrevdct.c.

Macro Definition Documentation

#define EIGHT_BIT_SAMPLES

Definition at line 68 of file jrevdct.c.

#define DCTSIZE 8

Definition at line 945 of file jrevdct.c.

#define DCTSIZE2 64

Definition at line 71 of file jrevdct.c.

#define GLOBAL

Definition at line 73 of file jrevdct.c.

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

Definition at line 75 of file jrevdct.c.

#define CONST_BITS 13

Definition at line 79 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

#define PASS1_BITS 2

Definition at line 127 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

#define ONE ((int32_t) 1)

Definition at line 132 of file jrevdct.c.

#define CONST_SCALE (ONE << CONST_BITS)

Definition at line 134 of file jrevdct.c.

Referenced by ff_j_rev_dct().

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

Definition at line 143 of file jrevdct.c.

Referenced by idct32().

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

Definition at line 150 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

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

Definition at line 173 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

#define FIX_0_211164243 1730

Definition at line 181 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_0_275899380 2260

Definition at line 182 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_0_298631336 2446

Definition at line 183 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_0_390180644 3196

Definition at line 184 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_0_509795579 4176

Definition at line 185 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_0_541196100 4433

Definition at line 186 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

#define FIX_0_601344887 4926

Definition at line 187 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_0_765366865 6270

Definition at line 188 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

#define FIX_0_785694958 6436

Definition at line 189 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_0_899976223 7373

Definition at line 190 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_061594337 8697

Definition at line 191 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_111140466 9102

Definition at line 192 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_175875602 9633

Definition at line 193 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_306562965 10703

Definition at line 194 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

#define FIX_1_387039845 11363

Definition at line 195 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_451774981 11893

Definition at line 196 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_501321110 12299

Definition at line 197 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_662939225 13623

Definition at line 198 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_1_847759065 15137

Definition at line 199 of file jrevdct.c.

Referenced by ff_j_rev_dct(), and ff_j_rev_dct4().

#define FIX_1_961570560 16069

Definition at line 200 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_2_053119869 16819

Definition at line 201 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_2_172734803 17799

Definition at line 202 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_2_562915447 20995

Definition at line 203 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define FIX_3_072711026 25172

Definition at line 204 of file jrevdct.c.

Referenced by ff_j_rev_dct().

#define DCTSIZE 4

Definition at line 945 of file jrevdct.c.

#define DCTSTRIDE 8

Definition at line 946 of file jrevdct.c.

Referenced by ff_j_rev_dct2(), and ff_j_rev_dct4().

Typedef Documentation

typedef int16_t DCTBLOCK[DCTSIZE2]

Definition at line 77 of file jrevdct.c.

Function Documentation

void ff_j_rev_dct ( DCTBLOCK data )

Definition at line 210 of file jrevdct.c.

void ff_j_rev_dct4 ( DCTBLOCK data )

Definition at line 948 of file jrevdct.c.

void ff_j_rev_dct2 ( DCTBLOCK data )

Definition at line 1135 of file jrevdct.c.

void ff_j_rev_dct1 ( DCTBLOCK data )

Definition at line 1150 of file jrevdct.c.

Macros

Typedefs

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Function Documentation