idct_altivec.c File Reference

#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "libavutil/ppc/types_altivec.h"
#include "dsputil_altivec.h"

Go to the source code of this file.

Macros
#define	IDCT_HALF
#define	IDCT
#define	COPY(dest, src)
#define	ADD(dest, src, perm)

Functions
void	ff_idct_put_altivec (uint8_t *dest, int stride, int16_t *blk)
void	ff_idct_add_altivec (uint8_t *dest, int stride, int16_t *blk)

Variables
static const vec_s16	constants [5]

Macro Definition Documentation

#define IDCT_HALF

Definition at line 47 of file idct_altivec.c.

#define IDCT

Definition at line 83 of file idct_altivec.c.

Referenced by ff_idct_add_altivec(), and ff_idct_put_altivec().

#define COPY	(		dest,
			src
	)

Value:

tmp = vec_packsu (src, src);                                \
    vec_ste ((vec_u32)tmp, 0, (unsigned int *)dest);       \
    vec_ste ((vec_u32)tmp, 4, (unsigned int *)dest);

#define ADD	(		dest,
			src,
			perm
	)

Value:

/* *(uint64_t *)&tmp = *(uint64_t *)dest; */                        \
    tmp = vec_ld (0, dest);                                             \
    tmp2 = (vec_s16)vec_perm (tmp, (vec_u8)zero, perm);       \
    tmp3 = vec_adds (tmp2, src);                                        \
    tmp = vec_packsu (tmp3, tmp3);                                      \
    vec_ste ((vec_u32)tmp, 0, (unsigned int *)dest);               \
    vec_ste ((vec_u32)tmp, 4, (unsigned int *)dest);

Function Documentation

void ff_idct_put_altivec	(	uint8_t *	dest,
		int	stride,
		int16_t *	blk
	)

Definition at line 160 of file idct_altivec.c.

Referenced by ff_dsputil_init_ppc().

void ff_idct_add_altivec	(	uint8_t *	dest,
		int	stride,
		int16_t *	blk
	)

Definition at line 182 of file idct_altivec.c.

Referenced by ff_dsputil_init_ppc().

Variable Documentation

const vec_s16 constants[5]

static

Initial value:

= {
    {23170, 13573,  6518, 21895, -23170, -21895,    32,    31},
    {16384, 22725, 21407, 19266,  16384,  19266, 21407, 22725},
    {22725, 31521, 29692, 26722,  22725,  26722, 29692, 31521},
    {21407, 29692, 27969, 25172,  21407,  25172, 27969, 29692},
    {19266, 26722, 25172, 22654,  19266,  22654, 25172, 26722}
}

Definition at line 152 of file idct_altivec.c.