simpleidct in C. More...

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

Macros
#define	IN_IDCT_DEPTH 16

#define	BIT_DEPTH 8

#define	BIT_DEPTH 10

#define	EXTRA_SHIFT 2

#define	BIT_DEPTH 12

#define	IN_IDCT_DEPTH 32

#define	BIT_DEPTH 10

#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_int16_10bit() 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

◆ IN_IDCT_DEPTH [1/2]

#define IN_IDCT_DEPTH 16

Definition at line 53 of file simple_idct.c.

◆ BIT_DEPTH [1/4]

#define BIT_DEPTH 8

Definition at line 54 of file simple_idct.c.

◆ BIT_DEPTH [2/4]

#define BIT_DEPTH 10

Definition at line 54 of file simple_idct.c.

◆ EXTRA_SHIFT

#define EXTRA_SHIFT 2

Definition at line 42 of file simple_idct.c.

◆ BIT_DEPTH [3/4]

#define BIT_DEPTH 12

Definition at line 54 of file simple_idct.c.

◆ IN_IDCT_DEPTH [2/2]

#define IN_IDCT_DEPTH 32

Definition at line 53 of file simple_idct.c.

◆ BIT_DEPTH [4/4]

#define BIT_DEPTH 10

Definition at line 54 of file simple_idct.c.

◆ CN_SHIFT [1/2]

#define CN_SHIFT 12

Definition at line 143 of file simple_idct.c.

Referenced by idct4col_put().

◆ C_FIX [1/2]

#define C_FIX ( x ) ((int)((x) * (1 << CN_SHIFT) + 0.5))

Definition at line 144 of file simple_idct.c.

◆ C1 [1/2]

#define C1 C_FIX(0.6532814824)

Definition at line 145 of file simple_idct.c.

Referenced by idct4col_add(), and idct4col_put().

◆ C2 [1/2]

#define C2 C_FIX(0.2705980501)

Definition at line 146 of file simple_idct.c.

Referenced by idct4col_add(), and idct4col_put().

◆ C_SHIFT [1/2]

#define C_SHIFT (4+1+12)

Definition at line 148 of file simple_idct.c.

Referenced by idct4col_add(), and idct4col_put().

◆ BF

#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 91 of file simple_idct.c.

Referenced by ff_simple_idct248_put().

◆ CN_SHIFT [2/2]

#define CN_SHIFT 12

Definition at line 143 of file simple_idct.c.

◆ C_FIX [2/2]

#define C_FIX ( x ) ((int)((x) * M_SQRT2 * (1 << CN_SHIFT) + 0.5))

Definition at line 144 of file simple_idct.c.

◆ C1 [2/2]

#define C1 C_FIX(0.6532814824)

Definition at line 145 of file simple_idct.c.

◆ C2 [2/2]

#define C2 C_FIX(0.2705980501)

Definition at line 146 of file simple_idct.c.

◆ C3

#define C3 C_FIX(0.5)

Definition at line 147 of file simple_idct.c.

Referenced by idct4col_add().

◆ C_SHIFT [2/2]

#define C_SHIFT (4+1+12)

Definition at line 148 of file simple_idct.c.

◆ RN_SHIFT

#define RN_SHIFT 15

Definition at line 170 of file simple_idct.c.

◆ R_FIX

#define R_FIX ( x ) ((int)((x) * M_SQRT2 * (1 << RN_SHIFT) + 0.5))

Definition at line 171 of file simple_idct.c.

◆ R1

#define R1 R_FIX(0.6532814824)

Definition at line 172 of file simple_idct.c.

Referenced by ff_yuv2rgb_init_tables_ppc(), and idct4row().

◆ R2

#define R2 R_FIX(0.2705980501)

Definition at line 173 of file simple_idct.c.

Referenced by idct4row(), and wv_unpack_stereo().

◆ R3

#define R3 R_FIX(0.5)

Definition at line 174 of file simple_idct.c.

Referenced by idct4row().

◆ R_SHIFT

#define R_SHIFT 11

Definition at line 175 of file simple_idct.c.

Referenced by idct4row().

Function Documentation

◆ idct4col_put()

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

inlinestatic

Definition at line 70 of file simple_idct.c.

Referenced by ff_simple_idct248_put().

◆ ff_simple_idct248_put()

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

Definition at line 106 of file simple_idct.c.

Referenced by dvvideo_decode_init(), and main().

◆ idct4col_add()

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

inlinestatic

Definition at line 149 of file simple_idct.c.

Referenced by ff_simple_idct44_add(), and ff_simple_idct84_add().

◆ idct4row()

static void idct4row ( int16_t * row )

inlinestatic

Definition at line 176 of file simple_idct.c.

Referenced by ff_simple_idct44_add(), and ff_simple_idct48_add().

◆ ff_simple_idct84_add()

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

Definition at line 194 of file simple_idct.c.

Referenced by ff_vc1_decode_sequence_header(), and wmv2_add_block().

◆ ff_simple_idct48_add()

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

Definition at line 209 of file simple_idct.c.

Referenced by ff_vc1_decode_sequence_header(), and wmv2_add_block().

◆ ff_simple_idct44_add()

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

Definition at line 224 of file simple_idct.c.

Referenced by ff_vc1_decode_sequence_header().

◆ ff_prores_idct()

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

Special version of ff_simple_idct_int16_10bit() 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 239 of file simple_idct.c.

Referenced by ff_prores_idct_wrap(), and prores_idct_put_c().

Macros

Functions

Detailed Description

Macro Definition Documentation

◆ IN_IDCT_DEPTH [1/2]

◆ BIT_DEPTH [1/4]

◆ BIT_DEPTH [2/4]

◆ EXTRA_SHIFT

◆ BIT_DEPTH [3/4]

◆ IN_IDCT_DEPTH [2/2]

◆ BIT_DEPTH [4/4]

◆ CN_SHIFT [1/2]

◆ C_FIX [1/2]

◆ C1 [1/2]

◆ C2 [1/2]

◆ C_SHIFT [1/2]

◆ BF

◆ CN_SHIFT [2/2]

◆ C_FIX [2/2]

◆ C1 [2/2]

◆ C2 [2/2]

◆ C3

◆ C_SHIFT [2/2]

◆ RN_SHIFT

◆ R_FIX

◆ R1

◆ R2

◆ R3

◆ R_SHIFT

Function Documentation

◆ idct4col_put()

◆ ff_simple_idct248_put()

◆ idct4col_add()

◆ idct4row()

◆ ff_simple_idct84_add()

◆ ff_simple_idct48_add()

◆ ff_simple_idct44_add()

◆ ff_prores_idct()