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"

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

Detailed Description

simpleidct in C.

Macro Definition Documentation

BF

#define BF

(

k

)

Value:

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