simple_idct.c File Reference

simpleidct in C. More...

#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "mathops.h"
#include "simple_idct.h"
#include "simple_idct_template.c"

Go to the source code of this file.

Macros
#define	BIT_DEPTH   8
#define	BIT_DEPTH   10
#define	EXTRA_SHIFT   2
#define	BIT_DEPTH   12
#define	CN_SHIFT   12
#define	C_FIX(x)   ((int)((x) * (1 << CN_SHIFT) + 0.5))
#define	C1   C_FIX(0.6532814824)
#define	C2   C_FIX(0.2705980501)
#define	C_SHIFT   (4+1+12)
#define	BF(k)
#define	CN_SHIFT   12
#define	C_FIX(x)   ((int)((x) * M_SQRT2 * (1 << CN_SHIFT) + 0.5))
#define	C1   C_FIX(0.6532814824)
#define	C2   C_FIX(0.2705980501)
#define	C3   C_FIX(0.5)
#define	C_SHIFT   (4+1+12)
#define	RN_SHIFT   15
#define	R_FIX(x)   ((int)((x) * M_SQRT2 * (1 << RN_SHIFT) + 0.5))
#define	R1   R_FIX(0.6532814824)
#define	R2   R_FIX(0.2705980501)
#define	R3   R_FIX(0.5)
#define	R_SHIFT   11

Functions
static void	idct4col_put (uint8_t *dest, ptrdiff_t line_size, const int16_t *col)
void	ff_simple_idct248_put (uint8_t *dest, ptrdiff_t line_size, int16_t *block)
static void	idct4col_add (uint8_t *dest, ptrdiff_t line_size, const int16_t *col)
static void	idct4row (int16_t *row)
void	ff_simple_idct84_add (uint8_t *dest, ptrdiff_t line_size, int16_t *block)
void	ff_simple_idct48_add (uint8_t *dest, ptrdiff_t line_size, int16_t *block)
void	ff_simple_idct44_add (uint8_t *dest, ptrdiff_t line_size, int16_t *block)
void	ff_prores_idct (int16_t *block, const int16_t *qmat)
	Special version of ff_simple_idct_10() which does dequantization and scales by a factor of 2 more between the two IDCTs to account for larger scale of input coefficients. More...

Detailed Description

simpleidct in C.

Definition in file simple_idct.c.

Macro Definition Documentation

#define BIT_DEPTH   8

Definition at line 46 of file simple_idct.c.

#define BIT_DEPTH   10

Definition at line 46 of file simple_idct.c.

#define EXTRA_SHIFT   2

Definition at line 40 of file simple_idct.c.

#define BIT_DEPTH   12

Definition at line 46 of file simple_idct.c.

#define CN_SHIFT   12

Definition at line 134 of file simple_idct.c.

Referenced by idct4col_put().

#define C_FIX

(

x

)

((int)((x) * (1 << CN_SHIFT) + 0.5))

Definition at line 135 of file simple_idct.c.

#define C1   C_FIX(0.6532814824)

Definition at line 136 of file simple_idct.c.

Referenced by idct4col_add(), and idct4col_put().

#define C2   C_FIX(0.2705980501)

Definition at line 137 of file simple_idct.c.

Referenced by idct4col_add(), and idct4col_put().

#define C_SHIFT   (4+1+12)

Definition at line 139 of file simple_idct.c.

Referenced by idct4col_add(), and idct4col_put().

#define BF

(

k

)

Value:

{\
    int a0, a1;\
    a0 = ptr[k];\
    a1 = ptr[8 + k];\
    ptr[k] = a0 + a1;\
    ptr[8 + k] = a0 - a1;\
}

Definition at line 82 of file simple_idct.c.

Referenced by ff_simple_idct248_put().

#define CN_SHIFT   12

Definition at line 134 of file simple_idct.c.

#define C_FIX

(

x

)

((int)((x) * M_SQRT2 * (1 << CN_SHIFT) + 0.5))

Definition at line 135 of file simple_idct.c.

#define C1   C_FIX(0.6532814824)

Definition at line 136 of file simple_idct.c.

#define C2   C_FIX(0.2705980501)

Definition at line 137 of file simple_idct.c.

#define C3   C_FIX(0.5)

Definition at line 138 of file simple_idct.c.

Referenced by idct4col_add().

#define C_SHIFT   (4+1+12)

Definition at line 139 of file simple_idct.c.

#define RN_SHIFT   15

Definition at line 161 of file simple_idct.c.

#define R_FIX

(

x

)

((int)((x) * M_SQRT2 * (1 << RN_SHIFT) + 0.5))

Definition at line 162 of file simple_idct.c.

#define R1   R_FIX(0.6532814824)

Definition at line 163 of file simple_idct.c.

Referenced by idct4row().

#define R2   R_FIX(0.2705980501)

Definition at line 164 of file simple_idct.c.

Referenced by idct4row(), and wv_unpack_stereo().

#define R3   R_FIX(0.5)

Definition at line 165 of file simple_idct.c.

Referenced by idct4row().

#define R_SHIFT   11

Definition at line 166 of file simple_idct.c.

Referenced by idct4row().

Function Documentation

static void idct4col_put ( uint8_t *  dest, ptrdiff_t  line_size, const int16_t *  col  )

inlinestatic

Definition at line 61 of file simple_idct.c.

Referenced by ff_simple_idct248_put().

void ff_simple_idct248_put	(	uint8_t *	dest,
		ptrdiff_t	line_size,
		int16_t *	block
	)

Definition at line 97 of file simple_idct.c.

Referenced by dvvideo_decode_init(), and main().

static void idct4col_add ( uint8_t *  dest, ptrdiff_t  line_size, const int16_t *  col  )

inlinestatic

Definition at line 140 of file simple_idct.c.

Referenced by ff_simple_idct44_add(), and ff_simple_idct84_add().

static void idct4row ( int16_t *  row )

inlinestatic

Definition at line 167 of file simple_idct.c.

Referenced by ff_simple_idct44_add(), and ff_simple_idct48_add().

void ff_simple_idct84_add	(	uint8_t *	dest,
		ptrdiff_t	line_size,
		int16_t *	block
	)

Definition at line 185 of file simple_idct.c.

Referenced by ff_vc1_decode_sequence_header(), and wmv2_add_block().

void ff_simple_idct48_add	(	uint8_t *	dest,
		ptrdiff_t	line_size,
		int16_t *	block
	)

Definition at line 200 of file simple_idct.c.

Referenced by ff_vc1_decode_sequence_header(), and wmv2_add_block().

void ff_simple_idct44_add	(	uint8_t *	dest,
		ptrdiff_t	line_size,
		int16_t *	block
	)

Definition at line 215 of file simple_idct.c.

Referenced by ff_vc1_decode_sequence_header().

void ff_prores_idct	(	int16_t *	block,
		const int16_t *	qmat
	)

Special version of ff_simple_idct_10() which does dequantization and scales by a factor of 2 more between the two IDCTs to account for larger scale of input coefficients.

Definition at line 230 of file simple_idct.c.

Referenced by ff_prores_idct_wrap(), and prores_idct_put_c().