www.pudn.com > x264_2007.rar > dct.c
/*****************************************************************************
* dct.c: h264 encoder library
*****************************************************************************
* Copyright (C) 2003 Laurent Aimar
* $Id$
*
* Authors: Eric Petit
* Guillaume Poirier
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#ifdef SYS_LINUX
#include
#endif
#include "common/common.h"
#include "ppccommon.h"
#define VEC_DCT(a0,a1,a2,a3,b0,b1,b2,b3) \
b1 = vec_add( a0, a3 ); \
b3 = vec_add( a1, a2 ); \
b0 = vec_add( b1, b3 ); \
b2 = vec_sub( b1, b3 ); \
a0 = vec_sub( a0, a3 ); \
a1 = vec_sub( a1, a2 ); \
b1 = vec_add( a0, a0 ); \
b1 = vec_add( b1, a1 ); \
b3 = vec_sub( a0, a1 ); \
b3 = vec_sub( b3, a1 )
void x264_sub4x4_dct_altivec( int16_t dct[4][4],
uint8_t *pix1, uint8_t *pix2 )
{
PREP_DIFF_8BYTEALIGNED;
vec_s16_t dct0v, dct1v, dct2v, dct3v;
vec_s16_t tmp0v, tmp1v, tmp2v, tmp3v;
vec_u8_t permHighv;
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 4, dct0v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 4, dct1v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 4, dct2v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 4, dct3v );
VEC_DCT( dct0v, dct1v, dct2v, dct3v, tmp0v, tmp1v, tmp2v, tmp3v );
VEC_TRANSPOSE_4( tmp0v, tmp1v, tmp2v, tmp3v,
dct0v, dct1v, dct2v, dct3v );
permHighv = (vec_u8_t) CV(0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17);
VEC_DCT( dct0v, dct1v, dct2v, dct3v, tmp0v, tmp1v, tmp2v, tmp3v );
vec_st(vec_perm(tmp0v, tmp1v, permHighv), 0, (int16_t*)dct);
vec_st(vec_perm(tmp2v, tmp3v, permHighv), 16, (int16_t*)dct);
}
void x264_sub8x8_dct_altivec( int16_t dct[4][4][4],
uint8_t *pix1, uint8_t *pix2 )
{
PREP_DIFF_8BYTEALIGNED;
vec_s16_t dct0v, dct1v, dct2v, dct3v, dct4v, dct5v, dct6v, dct7v;
vec_s16_t tmp0v, tmp1v, tmp2v, tmp3v, tmp4v, tmp5v, tmp6v, tmp7v;
vec_u8_t permHighv, permLowv;
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct0v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct1v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct2v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct3v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct4v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct5v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct6v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct7v );
VEC_DCT( dct0v, dct1v, dct2v, dct3v, tmp0v, tmp1v, tmp2v, tmp3v );
VEC_DCT( dct4v, dct5v, dct6v, dct7v, tmp4v, tmp5v, tmp6v, tmp7v );
VEC_TRANSPOSE_8( tmp0v, tmp1v, tmp2v, tmp3v,
tmp4v, tmp5v, tmp6v, tmp7v,
dct0v, dct1v, dct2v, dct3v,
dct4v, dct5v, dct6v, dct7v );
permHighv = (vec_u8_t) CV(0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17);
permLowv = (vec_u8_t) CV(0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F);
VEC_DCT( dct0v, dct1v, dct2v, dct3v, tmp0v, tmp1v, tmp2v, tmp3v );
VEC_DCT( dct4v, dct5v, dct6v, dct7v, tmp4v, tmp5v, tmp6v, tmp7v );
vec_st(vec_perm(tmp0v, tmp1v, permHighv), 0, (int16_t*)dct);
vec_st(vec_perm(tmp2v, tmp3v, permHighv), 16, (int16_t*)dct);
vec_st(vec_perm(tmp4v, tmp5v, permHighv), 32, (int16_t*)dct);
vec_st(vec_perm(tmp6v, tmp7v, permHighv), 48, (int16_t*)dct);
vec_st(vec_perm(tmp0v, tmp1v, permLowv), 64, (int16_t*)dct);
vec_st(vec_perm(tmp2v, tmp3v, permLowv), 80, (int16_t*)dct);
vec_st(vec_perm(tmp4v, tmp5v, permLowv), 96, (int16_t*)dct);
vec_st(vec_perm(tmp6v, tmp7v, permLowv), 112, (int16_t*)dct);
}
void x264_sub16x16_dct_altivec( int16_t dct[16][4][4],
uint8_t *pix1, uint8_t *pix2 )
{
x264_sub8x8_dct_altivec( &dct[ 0], &pix1[0], &pix2[0] );
x264_sub8x8_dct_altivec( &dct[ 4], &pix1[8], &pix2[8] );
x264_sub8x8_dct_altivec( &dct[ 8], &pix1[8*FENC_STRIDE+0], &pix2[8*FDEC_STRIDE+0] );
x264_sub8x8_dct_altivec( &dct[12], &pix1[8*FENC_STRIDE+8], &pix2[8*FDEC_STRIDE+8] );
}
/***************************************************************************
* 8x8 transform:
***************************************************************************/
/* DCT8_1D unrolled by 8 in Altivec */
#define DCT8_1D_ALTIVEC( dct0v, dct1v, dct2v, dct3v, dct4v, dct5v, dct6v, dct7v ) \
{ \
/* int s07 = SRC(0) + SRC(7); */ \
vec_s16_t s07v = vec_add( dct0v, dct7v); \
/* int s16 = SRC(1) + SRC(6); */ \
vec_s16_t s16v = vec_add( dct1v, dct6v); \
/* int s25 = SRC(2) + SRC(5); */ \
vec_s16_t s25v = vec_add( dct2v, dct5v); \
/* int s34 = SRC(3) + SRC(4); */ \
vec_s16_t s34v = vec_add( dct3v, dct4v); \
\
/* int a0 = s07 + s34; */ \
vec_s16_t a0v = vec_add(s07v, s34v); \
/* int a1 = s16 + s25; */ \
vec_s16_t a1v = vec_add(s16v, s25v); \
/* int a2 = s07 - s34; */ \
vec_s16_t a2v = vec_sub(s07v, s34v); \
/* int a3 = s16 - s25; */ \
vec_s16_t a3v = vec_sub(s16v, s25v); \
\
/* int d07 = SRC(0) - SRC(7); */ \
vec_s16_t d07v = vec_sub( dct0v, dct7v); \
/* int d16 = SRC(1) - SRC(6); */ \
vec_s16_t d16v = vec_sub( dct1v, dct6v); \
/* int d25 = SRC(2) - SRC(5); */ \
vec_s16_t d25v = vec_sub( dct2v, dct5v); \
/* int d34 = SRC(3) - SRC(4); */ \
vec_s16_t d34v = vec_sub( dct3v, dct4v); \
\
/* int a4 = d16 + d25 + (d07 + (d07>>1)); */ \
vec_s16_t a4v = vec_add( vec_add(d16v, d25v), vec_add(d07v, vec_sra(d07v, onev)) );\
/* int a5 = d07 - d34 - (d25 + (d25>>1)); */ \
vec_s16_t a5v = vec_sub( vec_sub(d07v, d34v), vec_add(d25v, vec_sra(d25v, onev)) );\
/* int a6 = d07 + d34 - (d16 + (d16>>1)); */ \
vec_s16_t a6v = vec_sub( vec_add(d07v, d34v), vec_add(d16v, vec_sra(d16v, onev)) );\
/* int a7 = d16 - d25 + (d34 + (d34>>1)); */ \
vec_s16_t a7v = vec_add( vec_sub(d16v, d25v), vec_add(d34v, vec_sra(d34v, onev)) );\
\
/* DST(0) = a0 + a1; */ \
dct0v = vec_add( a0v, a1v ); \
/* DST(1) = a4 + (a7>>2); */ \
dct1v = vec_add( a4v, vec_sra(a7v, twov) ); \
/* DST(2) = a2 + (a3>>1); */ \
dct2v = vec_add( a2v, vec_sra(a3v, onev) ); \
/* DST(3) = a5 + (a6>>2); */ \
dct3v = vec_add( a5v, vec_sra(a6v, twov) ); \
/* DST(4) = a0 - a1; */ \
dct4v = vec_sub( a0v, a1v ); \
/* DST(5) = a6 - (a5>>2); */ \
dct5v = vec_sub( a6v, vec_sra(a5v, twov) ); \
/* DST(6) = (a2>>1) - a3 ; */ \
dct6v = vec_sub( vec_sra(a2v, onev), a3v ); \
/* DST(7) = (a4>>2) - a7 ; */ \
dct7v = vec_sub( vec_sra(a4v, twov), a7v ); \
}
void x264_sub8x8_dct8_altivec( int16_t dct[8][8], uint8_t *pix1, uint8_t *pix2 )
{
vec_u16_t onev = vec_splat_u16(1);
vec_u16_t twov = vec_add( onev, onev );
PREP_DIFF_8BYTEALIGNED;
vec_s16_t dct0v, dct1v, dct2v, dct3v,
dct4v, dct5v, dct6v, dct7v;
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct0v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct1v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct2v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct3v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct4v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct5v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct6v );
VEC_DIFF_H_8BYTE_ALIGNED( pix1, FENC_STRIDE, pix2, FDEC_STRIDE, 8, dct7v );
DCT8_1D_ALTIVEC( dct0v, dct1v, dct2v, dct3v,
dct4v, dct5v, dct6v, dct7v );
vec_s16_t dct_tr0v, dct_tr1v, dct_tr2v, dct_tr3v,
dct_tr4v, dct_tr5v, dct_tr6v, dct_tr7v;
VEC_TRANSPOSE_8(dct0v, dct1v, dct2v, dct3v,
dct4v, dct5v, dct6v, dct7v,
dct_tr0v, dct_tr1v, dct_tr2v, dct_tr3v,
dct_tr4v, dct_tr5v, dct_tr6v, dct_tr7v );
DCT8_1D_ALTIVEC( dct_tr0v, dct_tr1v, dct_tr2v, dct_tr3v,
dct_tr4v, dct_tr5v, dct_tr6v, dct_tr7v );
vec_st( dct_tr0v, 0, (signed short *)dct );
vec_st( dct_tr1v, 16, (signed short *)dct );
vec_st( dct_tr2v, 32, (signed short *)dct );
vec_st( dct_tr3v, 48, (signed short *)dct );
vec_st( dct_tr4v, 64, (signed short *)dct );
vec_st( dct_tr5v, 80, (signed short *)dct );
vec_st( dct_tr6v, 96, (signed short *)dct );
vec_st( dct_tr7v, 112, (signed short *)dct );
}
void x264_sub16x16_dct8_altivec( int16_t dct[4][8][8], uint8_t *pix1, uint8_t *pix2 )
{
x264_sub8x8_dct8_altivec( dct[0], &pix1[0], &pix2[0] );
x264_sub8x8_dct8_altivec( dct[1], &pix1[8], &pix2[8] );
x264_sub8x8_dct8_altivec( dct[2], &pix1[8*FENC_STRIDE+0], &pix2[8*FDEC_STRIDE+0] );
x264_sub8x8_dct8_altivec( dct[3], &pix1[8*FENC_STRIDE+8], &pix2[8*FDEC_STRIDE+8] );
}
/****************************************************************************
* IDCT transform:
****************************************************************************/
#define IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7, d0, d1, d2, d3, d4, d5, d6, d7)\
{\
/* a0 = SRC(0) + SRC(4); */ \
vec_s16_t a0v = vec_add(s0, s4); \
/* a2 = SRC(0) - SRC(4); */ \
vec_s16_t a2v = vec_sub(s0, s4); \
/* a4 = (SRC(2)>>1) - SRC(6); */ \
vec_s16_t a4v = vec_sub(vec_sra(s2, onev), s6); \
/* a6 = (SRC(6)>>1) + SRC(2); */ \
vec_s16_t a6v = vec_add(vec_sra(s6, onev), s2); \
/* b0 = a0 + a6; */ \
vec_s16_t b0v = vec_add(a0v, a6v); \
/* b2 = a2 + a4; */ \
vec_s16_t b2v = vec_add(a2v, a4v); \
/* b4 = a2 - a4; */ \
vec_s16_t b4v = vec_sub(a2v, a4v); \
/* b6 = a0 - a6; */ \
vec_s16_t b6v = vec_sub(a0v, a6v); \
/* a1 = SRC(5) - SRC(3) - SRC(7) - (SRC(7)>>1); */ \
/* a1 = (SRC(5)-SRC(3)) - (SRC(7) + (SRC(7)>>1)); */ \
vec_s16_t a1v = vec_sub( vec_sub(s5, s3), vec_add(s7, vec_sra(s7, onev)) );\
/* a3 = SRC(7) + SRC(1) - SRC(3) - (SRC(3)>>1); */ \
/* a3 = (SRC(7)+SRC(1)) - (SRC(3) + (SRC(3)>>1)); */ \
vec_s16_t a3v = vec_sub( vec_add(s7, s1), vec_add(s3, vec_sra(s3, onev)) );\
/* a5 = SRC(7) - SRC(1) + SRC(5) + (SRC(5)>>1); */ \
/* a5 = (SRC(7)-SRC(1)) + SRC(5) + (SRC(5)>>1); */ \
vec_s16_t a5v = vec_add( vec_sub(s7, s1), vec_add(s5, vec_sra(s5, onev)) );\
/* a7 = SRC(5)+SRC(3) + SRC(1) + (SRC(1)>>1); */ \
vec_s16_t a7v = vec_add( vec_add(s5, s3), vec_add(s1, vec_sra(s1, onev)) );\
/* b1 = (a7>>2) + a1; */ \
vec_s16_t b1v = vec_add( vec_sra(a7v, twov), a1v); \
/* b3 = a3 + (a5>>2); */ \
vec_s16_t b3v = vec_add(a3v, vec_sra(a5v, twov)); \
/* b5 = (a3>>2) - a5; */ \
vec_s16_t b5v = vec_sub( vec_sra(a3v, twov), a5v); \
/* b7 = a7 - (a1>>2); */ \
vec_s16_t b7v = vec_sub( a7v, vec_sra(a1v, twov)); \
/* DST(0, b0 + b7); */ \
d0 = vec_add(b0v, b7v); \
/* DST(1, b2 + b5); */ \
d1 = vec_add(b2v, b5v); \
/* DST(2, b4 + b3); */ \
d2 = vec_add(b4v, b3v); \
/* DST(3, b6 + b1); */ \
d3 = vec_add(b6v, b1v); \
/* DST(4, b6 - b1); */ \
d4 = vec_sub(b6v, b1v); \
/* DST(5, b4 - b3); */ \
d5 = vec_sub(b4v, b3v); \
/* DST(6, b2 - b5); */ \
d6 = vec_sub(b2v, b5v); \
/* DST(7, b0 - b7); */ \
d7 = vec_sub(b0v, b7v); \
}
#define ALTIVEC_STORE_SUM_CLIP(dest, idctv, perm_ldv, perm_stv, sel)\
{\
/* unaligned load */ \
vec_u8_t hv = vec_ld( 0, dest ); \
vec_u8_t lv = vec_ld( 7, dest ); \
vec_u8_t dstv = vec_perm( hv, lv, (vec_u8_t)perm_ldv ); \
vec_s16_t idct_sh6 = vec_sra(idctv, sixv); \
vec_u16_t dst16 = (vec_u16_t)vec_mergeh(zero_u8v, dstv); \
vec_s16_t idstsum = vec_adds(idct_sh6, (vec_s16_t)dst16); \
vec_u8_t idstsum8 = vec_packsu(zero_s16v, idstsum); \
/* unaligned store */ \
vec_u8_t bodyv = vec_perm( idstsum8, idstsum8, perm_stv );\
vec_u8_t edgelv = vec_perm( sel, zero_u8v, perm_stv ); \
lv = vec_sel( lv, bodyv, edgelv ); \
vec_st( lv, 7, dest ); \
hv = vec_ld( 0, dest ); \
vec_u8_t edgehv = vec_perm( zero_u8v, sel, perm_stv ); \
hv = vec_sel( hv, bodyv, edgehv ); \
vec_st( hv, 0, dest ); \
}
void x264_add8x8_idct8_altivec( uint8_t *dst, int16_t dct[8][8] )
{
vec_u16_t onev = vec_splat_u16(1);
vec_u16_t twov = vec_splat_u16(2);
dct[0][0] += 32; // rounding for the >>6 at the end
vec_s16_t s0, s1, s2, s3, s4, s5, s6, s7;
s0 = vec_ld(0x00, (int16_t*)dct);
s1 = vec_ld(0x10, (int16_t*)dct);
s2 = vec_ld(0x20, (int16_t*)dct);
s3 = vec_ld(0x30, (int16_t*)dct);
s4 = vec_ld(0x40, (int16_t*)dct);
s5 = vec_ld(0x50, (int16_t*)dct);
s6 = vec_ld(0x60, (int16_t*)dct);
s7 = vec_ld(0x70, (int16_t*)dct);
vec_s16_t d0, d1, d2, d3, d4, d5, d6, d7;
IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7, d0, d1, d2, d3, d4, d5, d6, d7);
vec_s16_t tr0, tr1, tr2, tr3, tr4, tr5, tr6, tr7;
VEC_TRANSPOSE_8( d0, d1, d2, d3, d4, d5, d6, d7,
tr0, tr1, tr2, tr3, tr4, tr5, tr6, tr7);
vec_s16_t idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7;
IDCT8_1D_ALTIVEC(tr0, tr1, tr2, tr3, tr4, tr5, tr6, tr7,
idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7);
vec_u8_t perm_ldv = vec_lvsl(0, dst);
vec_u8_t perm_stv = vec_lvsr(8, dst);
vec_u16_t sixv = vec_splat_u16(6);
const vec_u8_t sel = (vec_u8_t) CV(0,0,0,0,0,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1);
LOAD_ZERO;
ALTIVEC_STORE_SUM_CLIP(&dst[0*FDEC_STRIDE], idct0, perm_ldv, perm_stv, sel);
ALTIVEC_STORE_SUM_CLIP(&dst[1*FDEC_STRIDE], idct1, perm_ldv, perm_stv, sel);
ALTIVEC_STORE_SUM_CLIP(&dst[2*FDEC_STRIDE], idct2, perm_ldv, perm_stv, sel);
ALTIVEC_STORE_SUM_CLIP(&dst[3*FDEC_STRIDE], idct3, perm_ldv, perm_stv, sel);
ALTIVEC_STORE_SUM_CLIP(&dst[4*FDEC_STRIDE], idct4, perm_ldv, perm_stv, sel);
ALTIVEC_STORE_SUM_CLIP(&dst[5*FDEC_STRIDE], idct5, perm_ldv, perm_stv, sel);
ALTIVEC_STORE_SUM_CLIP(&dst[6*FDEC_STRIDE], idct6, perm_ldv, perm_stv, sel);
ALTIVEC_STORE_SUM_CLIP(&dst[7*FDEC_STRIDE], idct7, perm_ldv, perm_stv, sel);
}
void x264_add16x16_idct8_altivec( uint8_t *dst, int16_t dct[4][8][8] )
{
x264_add8x8_idct8_altivec( &dst[0], dct[0] );
x264_add8x8_idct8_altivec( &dst[8], dct[1] );
x264_add8x8_idct8_altivec( &dst[8*FDEC_STRIDE+0], dct[2] );
x264_add8x8_idct8_altivec( &dst[8*FDEC_STRIDE+8], dct[3] );
}