libavcodec/binkidct.c File Reference

Bink IDCT algorithm. More...

#include "dsputil.h"

Go to the source code of this file.

Defines
#define	A1   2896
#define	A2   2217
#define	A3   3784
#define	A4   -5352
#define	IDCT_TRANSFORM(dest, s0, s1, s2, s3, s4, s5, s6, s7, d0, d1, d2, d3, d4, d5, d6, d7, munge, src)
#define	MUNGE_NONE(x)   (x)
#define	IDCT_COL(dest, src)   IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src)
#define	MUNGE_ROW(x)   (((x) + 0x7F)>>8)
#define	IDCT_ROW(dest, src)   IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_ROW,src)
Functions
static void	bink_idct_col (DCTELEM *dest, const DCTELEM *src)
void	ff_bink_idct_c (DCTELEM *block)
void	ff_bink_idct_add_c (uint8_t *dest, int linesize, DCTELEM *block)
void	ff_bink_idct_put_c (uint8_t *dest, int linesize, DCTELEM *block)

---

Detailed Description

Bink IDCT algorithm.

Definition in file binkidct.c.

---

Define Documentation

#define A1   2896

Definition at line 29 of file binkidct.c.

Referenced by ff_faandct(), ff_faandct248(), horizontal_decompose53i(), and row_fdct().

#define A2   2217

Definition at line 30 of file binkidct.c.

Referenced by ff_faandct(), horizontal_decompose53i(), p8idct(), and row_fdct().

#define A3   3784

Definition at line 31 of file binkidct.c.

Referenced by horizontal_decompose53i().

#define A4   -5352

Definition at line 32 of file binkidct.c.

Referenced by ff_faandct(), horizontal_decompose53i(), p8idct(), and row_fdct().

#define IDCT_COL	(	dest,
		src		)	IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src)

Definition at line 60 of file binkidct.c.

Referenced by bink_idct_col(), and ea_idct_col().

#define IDCT_ROW	(	dest,
		src		)	IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_ROW,src)

Definition at line 63 of file binkidct.c.

Referenced by ff_bink_idct_c(), ff_bink_idct_put_c(), and ff_ea_idct_put_c().

#define IDCT_TRANSFORM	(	dest,
		s0,
		s1,
		s2,
		s3,
		s4,
		s5,
		s6,
		s7,
		d0,
		d1,
		d2,
		d3,
		d4,
		d5,
		d6,
		d7,
		munge,
		src		)

Value:

{\
    const int a0 = (src)[s0] + (src)[s4]; \
    const int a1 = (src)[s0] - (src)[s4]; \
    const int a2 = (src)[s2] + (src)[s6]; \
    const int a3 = (A1*((src)[s2] - (src)[s6])) >> 11; \
    const int a4 = (src)[s5] + (src)[s3]; \
    const int a5 = (src)[s5] - (src)[s3]; \
    const int a6 = (src)[s1] + (src)[s7]; \
    const int a7 = (src)[s1] - (src)[s7]; \
    const int b0 = a4 + a6; \
    const int b1 = (A3*(a5 + a7)) >> 11; \
    const int b2 = ((A4*a5) >> 11) - b0 + b1; \
    const int b3 = (A1*(a6 - a4) >> 11) - b2; \
    const int b4 = ((A2*a7) >> 11) + b3 - b1; \
    (dest)[d0] = munge(a0+a2   +b0); \
    (dest)[d1] = munge(a1+a3-a2+b2); \
    (dest)[d2] = munge(a1-a3+a2+b3); \
    (dest)[d3] = munge(a0-a2   -b4); \
    (dest)[d4] = munge(a0-a2   +b4); \
    (dest)[d5] = munge(a1-a3+a2-b3); \
    (dest)[d6] = munge(a1+a3-a2-b2); \
    (dest)[d7] = munge(a0+a2   -b0); \
}

Definition at line 34 of file binkidct.c.

#define MUNGE_NONE

(

x

)

(x)

Definition at line 59 of file binkidct.c.

#define MUNGE_ROW

(

x

)

(((x) + 0x7F)>>8)

Definition at line 62 of file binkidct.c.

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Function Documentation

static void bink_idct_col	(	DCTELEM *	dest,
		const DCTELEM *	src
	)			[inline, static]

Definition at line 65 of file binkidct.c.

Referenced by ff_bink_idct_c(), and ff_bink_idct_put_c().

void ff_bink_idct_add_c	(	uint8_t *	dest,
		int	linesize,
		DCTELEM *	block
	)

Definition at line 93 of file binkidct.c.

Referenced by dsputil_init().

void ff_bink_idct_c

(

DCTELEM *

block

)

Definition at line 81 of file binkidct.c.

Referenced by dsputil_init(), and ff_bink_idct_add_c().

void ff_bink_idct_put_c	(	uint8_t *	dest,
		int	linesize,
		DCTELEM *	block
	)

Definition at line 103 of file binkidct.c.

Referenced by dsputil_init().