www.pudn.com > x264_2007.rar > dct.c
/*****************************************************************************
* dct.c: h264 encoder library
*****************************************************************************
* Copyright (C) 2003 Laurent Aimar
* $Id: dct.c,v 1.1 2004/06/03 19:27:06 fenrir Exp $
*
* Authors: Laurent Aimar
*
* 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.
*****************************************************************************/
#include "common.h"
#ifdef HAVE_MMX
# include "i386/dct.h"
#endif
#ifdef ARCH_PPC
# include "ppc/dct.h"
#endif
int x264_dct4_weight2_zigzag[2][16];
int x264_dct8_weight2_zigzag[2][64];
static inline int clip_uint8( int a )
{
if (a&(~255))
return (-a)>>31;
else
return a;
}
/*
* XXX For all dct dc : input could be equal to output so ...
*/
static void dct2x2dc( int16_t d[2][2] )
{
int tmp[2][2];
tmp[0][0] = d[0][0] + d[0][1];
tmp[1][0] = d[0][0] - d[0][1];
tmp[0][1] = d[1][0] + d[1][1];
tmp[1][1] = d[1][0] - d[1][1];
d[0][0] = tmp[0][0] + tmp[0][1];
d[1][0] = tmp[1][0] + tmp[1][1];
d[0][1] = tmp[0][0] - tmp[0][1];
d[1][1] = tmp[1][0] - tmp[1][1];
}
static void dct4x4dc( int16_t d[4][4] )
{
int16_t tmp[4][4];
int s01, s23;
int d01, d23;
int i;
for( i = 0; i < 4; i++ )
{
s01 = d[i][0] + d[i][1];
d01 = d[i][0] - d[i][1];
s23 = d[i][2] + d[i][3];
d23 = d[i][2] - d[i][3];
tmp[0][i] = s01 + s23;
tmp[1][i] = s01 - s23;
tmp[2][i] = d01 - d23;
tmp[3][i] = d01 + d23;
}
for( i = 0; i < 4; i++ )
{
s01 = tmp[i][0] + tmp[i][1];
d01 = tmp[i][0] - tmp[i][1];
s23 = tmp[i][2] + tmp[i][3];
d23 = tmp[i][2] - tmp[i][3];
d[i][0] = ( s01 + s23 + 1 ) >> 1;
d[i][1] = ( s01 - s23 + 1 ) >> 1;
d[i][2] = ( d01 - d23 + 1 ) >> 1;
d[i][3] = ( d01 + d23 + 1 ) >> 1;
}
}
static void idct4x4dc( int16_t d[4][4] )
{
int16_t tmp[4][4];
int s01, s23;
int d01, d23;
int i;
for( i = 0; i < 4; i++ )
{
s01 = d[i][0] + d[i][1];
d01 = d[i][0] - d[i][1];
s23 = d[i][2] + d[i][3];
d23 = d[i][2] - d[i][3];
tmp[0][i] = s01 + s23;
tmp[1][i] = s01 - s23;
tmp[2][i] = d01 - d23;
tmp[3][i] = d01 + d23;
}
for( i = 0; i < 4; i++ )
{
s01 = tmp[i][0] + tmp[i][1];
d01 = tmp[i][0] - tmp[i][1];
s23 = tmp[i][2] + tmp[i][3];
d23 = tmp[i][2] - tmp[i][3];
d[i][0] = s01 + s23;
d[i][1] = s01 - s23;
d[i][2] = d01 - d23;
d[i][3] = d01 + d23;
}
}
static inline void pixel_sub_wxh( int16_t *diff, int i_size,
uint8_t *pix1, int i_pix1, uint8_t *pix2, int i_pix2 )
{
int y, x;
for( y = 0; y < i_size; y++ )
{
for( x = 0; x < i_size; x++ )
{
diff[x + y*i_size] = pix1[x] - pix2[x];
}
pix1 += i_pix1;
pix2 += i_pix2;
}
}
static void sub4x4_dct( int16_t dct[4][4], uint8_t *pix1, uint8_t *pix2 )
{
int16_t d[4][4];
int16_t tmp[4][4];
int i;
pixel_sub_wxh( (int16_t*)d, 4, pix1, FENC_STRIDE, pix2, FDEC_STRIDE );
for( i = 0; i < 4; i++ )
{
const int s03 = d[i][0] + d[i][3];
const int s12 = d[i][1] + d[i][2];
const int d03 = d[i][0] - d[i][3];
const int d12 = d[i][1] - d[i][2];
tmp[0][i] = s03 + s12;
tmp[1][i] = 2*d03 + d12;
tmp[2][i] = s03 - s12;
tmp[3][i] = d03 - 2*d12;
}
for( i = 0; i < 4; i++ )
{
const int s03 = tmp[i][0] + tmp[i][3];
const int s12 = tmp[i][1] + tmp[i][2];
const int d03 = tmp[i][0] - tmp[i][3];
const int d12 = tmp[i][1] - tmp[i][2];
dct[i][0] = s03 + s12;
dct[i][1] = 2*d03 + d12;
dct[i][2] = s03 - s12;
dct[i][3] = d03 - 2*d12;
}
}
static void sub8x8_dct( int16_t dct[4][4][4], uint8_t *pix1, uint8_t *pix2 )
{
sub4x4_dct( dct[0], &pix1[0], &pix2[0] );
sub4x4_dct( dct[1], &pix1[4], &pix2[4] );
sub4x4_dct( dct[2], &pix1[4*FENC_STRIDE+0], &pix2[4*FDEC_STRIDE+0] );
sub4x4_dct( dct[3], &pix1[4*FENC_STRIDE+4], &pix2[4*FDEC_STRIDE+4] );
}
static void sub16x16_dct( int16_t dct[16][4][4], uint8_t *pix1, uint8_t *pix2 )
{
sub8x8_dct( &dct[ 0], &pix1[0], &pix2[0] );
sub8x8_dct( &dct[ 4], &pix1[8], &pix2[8] );
sub8x8_dct( &dct[ 8], &pix1[8*FENC_STRIDE+0], &pix2[8*FDEC_STRIDE+0] );
sub8x8_dct( &dct[12], &pix1[8*FENC_STRIDE+8], &pix2[8*FDEC_STRIDE+8] );
}
static void add4x4_idct( uint8_t *p_dst, int16_t dct[4][4] )
{
int16_t d[4][4];
int16_t tmp[4][4];
int x, y;
int i;
for( i = 0; i < 4; i++ )
{
const int s02 = dct[0][i] + dct[2][i];
const int d02 = dct[0][i] - dct[2][i];
const int s13 = dct[1][i] + (dct[3][i]>>1);
const int d13 = (dct[1][i]>>1) - dct[3][i];
tmp[i][0] = s02 + s13;
tmp[i][1] = d02 + d13;
tmp[i][2] = d02 - d13;
tmp[i][3] = s02 - s13;
}
for( i = 0; i < 4; i++ )
{
const int s02 = tmp[0][i] + tmp[2][i];
const int d02 = tmp[0][i] - tmp[2][i];
const int s13 = tmp[1][i] + (tmp[3][i]>>1);
const int d13 = (tmp[1][i]>>1) - tmp[3][i];
d[0][i] = ( s02 + s13 + 32 ) >> 6;
d[1][i] = ( d02 + d13 + 32 ) >> 6;
d[2][i] = ( d02 - d13 + 32 ) >> 6;
d[3][i] = ( s02 - s13 + 32 ) >> 6;
}
for( y = 0; y < 4; y++ )
{
for( x = 0; x < 4; x++ )
{
p_dst[x] = clip_uint8( p_dst[x] + d[y][x] );
}
p_dst += FDEC_STRIDE;
}
}
static void add8x8_idct( uint8_t *p_dst, int16_t dct[4][4][4] )
{
add4x4_idct( &p_dst[0], dct[0] );
add4x4_idct( &p_dst[4], dct[1] );
add4x4_idct( &p_dst[4*FDEC_STRIDE+0], dct[2] );
add4x4_idct( &p_dst[4*FDEC_STRIDE+4], dct[3] );
}
static void add16x16_idct( uint8_t *p_dst, int16_t dct[16][4][4] )
{
add8x8_idct( &p_dst[0], &dct[0] );
add8x8_idct( &p_dst[8], &dct[4] );
add8x8_idct( &p_dst[8*FDEC_STRIDE+0], &dct[8] );
add8x8_idct( &p_dst[8*FDEC_STRIDE+8], &dct[12] );
}
/****************************************************************************
* 8x8 transform:
****************************************************************************/
#define DCT8_1D {\
const int s07 = SRC(0) + SRC(7);\
const int s16 = SRC(1) + SRC(6);\
const int s25 = SRC(2) + SRC(5);\
const int s34 = SRC(3) + SRC(4);\
const int a0 = s07 + s34;\
const int a1 = s16 + s25;\
const int a2 = s07 - s34;\
const int a3 = s16 - s25;\
const int d07 = SRC(0) - SRC(7);\
const int d16 = SRC(1) - SRC(6);\
const int d25 = SRC(2) - SRC(5);\
const int d34 = SRC(3) - SRC(4);\
const int a4 = d16 + d25 + (d07 + (d07>>1));\
const int a5 = d07 - d34 - (d25 + (d25>>1));\
const int a6 = d07 + d34 - (d16 + (d16>>1));\
const int a7 = d16 - d25 + (d34 + (d34>>1));\
DST(0) = a0 + a1 ;\
DST(1) = a4 + (a7>>2);\
DST(2) = a2 + (a3>>1);\
DST(3) = a5 + (a6>>2);\
DST(4) = a0 - a1 ;\
DST(5) = a6 - (a5>>2);\
DST(6) = (a2>>1) - a3 ;\
DST(7) = (a4>>2) - a7 ;\
}
static void sub8x8_dct8( int16_t dct[8][8], uint8_t *pix1, uint8_t *pix2 )
{
int i;
int16_t tmp[8][8];
pixel_sub_wxh( (int16_t*)tmp, 8, pix1, FENC_STRIDE, pix2, FDEC_STRIDE );
#define SRC(x) tmp[x][i]
#define DST(x) tmp[x][i]
for( i = 0; i < 8; i++ )
DCT8_1D
#undef SRC
#undef DST
#define SRC(x) tmp[i][x]
#define DST(x) dct[x][i]
for( i = 0; i < 8; i++ )
DCT8_1D
#undef SRC
#undef DST
}
static void sub16x16_dct8( int16_t dct[4][8][8], uint8_t *pix1, uint8_t *pix2 )
{
sub8x8_dct8( dct[0], &pix1[0], &pix2[0] );
sub8x8_dct8( dct[1], &pix1[8], &pix2[8] );
sub8x8_dct8( dct[2], &pix1[8*FENC_STRIDE+0], &pix2[8*FDEC_STRIDE+0] );
sub8x8_dct8( dct[3], &pix1[8*FENC_STRIDE+8], &pix2[8*FDEC_STRIDE+8] );
}
#define IDCT8_1D {\
const int a0 = SRC(0) + SRC(4);\
const int a2 = SRC(0) - SRC(4);\
const int a4 = (SRC(2)>>1) - SRC(6);\
const int a6 = (SRC(6)>>1) + SRC(2);\
const int b0 = a0 + a6;\
const int b2 = a2 + a4;\
const int b4 = a2 - a4;\
const int b6 = a0 - a6;\
const int a1 = -SRC(3) + SRC(5) - SRC(7) - (SRC(7)>>1);\
const int a3 = SRC(1) + SRC(7) - SRC(3) - (SRC(3)>>1);\
const int a5 = -SRC(1) + SRC(7) + SRC(5) + (SRC(5)>>1);\
const int a7 = SRC(3) + SRC(5) + SRC(1) + (SRC(1)>>1);\
const int b1 = (a7>>2) + a1;\
const int b3 = a3 + (a5>>2);\
const int b5 = (a3>>2) - a5;\
const int b7 = a7 - (a1>>2);\
DST(0, b0 + b7);\
DST(1, b2 + b5);\
DST(2, b4 + b3);\
DST(3, b6 + b1);\
DST(4, b6 - b1);\
DST(5, b4 - b3);\
DST(6, b2 - b5);\
DST(7, b0 - b7);\
}
static void add8x8_idct8( uint8_t *dst, int16_t dct[8][8] )
{
int i;
dct[0][0] += 32; // rounding for the >>6 at the end
#define SRC(x) dct[x][i]
#define DST(x,rhs) dct[x][i] = (rhs)
for( i = 0; i < 8; i++ )
IDCT8_1D
#undef SRC
#undef DST
#define SRC(x) dct[i][x]
#define DST(x,rhs) dst[i + x*FDEC_STRIDE] = clip_uint8( dst[i + x*FDEC_STRIDE] + ((rhs) >> 6) );
for( i = 0; i < 8; i++ )
IDCT8_1D
#undef SRC
#undef DST
}
static void add16x16_idct8( uint8_t *dst, int16_t dct[4][8][8] )
{
add8x8_idct8( &dst[0], dct[0] );
add8x8_idct8( &dst[8], dct[1] );
add8x8_idct8( &dst[8*FDEC_STRIDE+0], dct[2] );
add8x8_idct8( &dst[8*FDEC_STRIDE+8], dct[3] );
}
/****************************************************************************
* x264_dct_init:
****************************************************************************/
void x264_dct_init( int cpu, x264_dct_function_t *dctf )
{
dctf->sub4x4_dct = sub4x4_dct;
dctf->add4x4_idct = add4x4_idct;
dctf->sub8x8_dct = sub8x8_dct;
dctf->add8x8_idct = add8x8_idct;
dctf->sub16x16_dct = sub16x16_dct;
dctf->add16x16_idct = add16x16_idct;
dctf->sub8x8_dct8 = sub8x8_dct8;
dctf->add8x8_idct8 = add8x8_idct8;
dctf->sub16x16_dct8 = sub16x16_dct8;
dctf->add16x16_idct8 = add16x16_idct8;
dctf->dct4x4dc = dct4x4dc;
dctf->idct4x4dc = idct4x4dc;
dctf->dct2x2dc = dct2x2dc;
dctf->idct2x2dc = dct2x2dc;
#ifdef HAVE_MMX
if( cpu&X264_CPU_MMX )
{
dctf->sub4x4_dct = x264_sub4x4_dct_mmx;
dctf->sub8x8_dct = x264_sub8x8_dct_mmx;
dctf->sub16x16_dct = x264_sub16x16_dct_mmx;
dctf->add4x4_idct = x264_add4x4_idct_mmx;
dctf->add8x8_idct = x264_add8x8_idct_mmx;
dctf->add16x16_idct = x264_add16x16_idct_mmx;
dctf->dct4x4dc = x264_dct4x4dc_mmx;
dctf->idct4x4dc = x264_idct4x4dc_mmx;
#ifndef ARCH_X86_64
dctf->sub8x8_dct8 = x264_sub8x8_dct8_mmx;
dctf->sub16x16_dct8 = x264_sub16x16_dct8_mmx;
dctf->add8x8_idct8 = x264_add8x8_idct8_mmx;
dctf->add16x16_idct8= x264_add16x16_idct8_mmx;
#endif
}
#ifdef ARCH_X86_64
if( cpu&X264_CPU_SSE2 )
{
dctf->sub8x8_dct8 = x264_sub8x8_dct8_sse2;
dctf->sub16x16_dct8 = x264_sub16x16_dct8_sse2;
dctf->add8x8_idct8 = x264_add8x8_idct8_sse2;
dctf->add16x16_idct8= x264_add16x16_idct8_sse2;
}
#endif
#endif //HAVE_MMX
#ifdef ARCH_PPC
if( cpu&X264_CPU_ALTIVEC )
{
dctf->sub4x4_dct = x264_sub4x4_dct_altivec;
dctf->sub8x8_dct = x264_sub8x8_dct_altivec;
dctf->sub16x16_dct = x264_sub16x16_dct_altivec;
dctf->sub8x8_dct8 = x264_sub8x8_dct8_altivec;
dctf->sub16x16_dct8 = x264_sub16x16_dct8_altivec;
dctf->add8x8_idct8 = x264_add8x8_idct8_altivec;
dctf->add16x16_idct8= x264_add16x16_idct8_altivec;
}
#endif
}
void x264_dct_init_weights( void )
{
int i, j;
for( j=0; j<2; j++ )
{
for( i=0; i<16; i++ )
x264_dct4_weight2_zigzag[j][i] = x264_dct4_weight2_tab[ x264_zigzag_scan4[j][i] ];
for( i=0; i<64; i++ )
x264_dct8_weight2_zigzag[j][i] = x264_dct8_weight2_tab[ x264_zigzag_scan8[j][i] ];
}
}
#define ZIG(i,y,x) level[i] = dct[x][y];
static void zigzag_scan_8x8_frame( int level[64], int16_t dct[8][8] )
{
ZIG( 0,0,0) ZIG( 1,0,1) ZIG( 2,1,0) ZIG( 3,2,0)
ZIG( 4,1,1) ZIG( 5,0,2) ZIG( 6,0,3) ZIG( 7,1,2)
ZIG( 8,2,1) ZIG( 9,3,0) ZIG(10,4,0) ZIG(11,3,1)
ZIG(12,2,2) ZIG(13,1,3) ZIG(14,0,4) ZIG(15,0,5)
ZIG(16,1,4) ZIG(17,2,3) ZIG(18,3,2) ZIG(19,4,1)
ZIG(20,5,0) ZIG(21,6,0) ZIG(22,5,1) ZIG(23,4,2)
ZIG(24,3,3) ZIG(25,2,4) ZIG(26,1,5) ZIG(27,0,6)
ZIG(28,0,7) ZIG(29,1,6) ZIG(30,2,5) ZIG(31,3,4)
ZIG(32,4,3) ZIG(33,5,2) ZIG(34,6,1) ZIG(35,7,0)
ZIG(36,7,1) ZIG(37,6,2) ZIG(38,5,3) ZIG(39,4,4)
ZIG(40,3,5) ZIG(41,2,6) ZIG(42,1,7) ZIG(43,2,7)
ZIG(44,3,6) ZIG(45,4,5) ZIG(46,5,4) ZIG(47,6,3)
ZIG(48,7,2) ZIG(49,7,3) ZIG(50,6,4) ZIG(51,5,5)
ZIG(52,4,6) ZIG(53,3,7) ZIG(54,4,7) ZIG(55,5,6)
ZIG(56,6,5) ZIG(57,7,4) ZIG(58,7,5) ZIG(59,6,6)
ZIG(60,5,7) ZIG(61,6,7) ZIG(62,7,6) ZIG(63,7,7)
}
static void zigzag_scan_8x8_field( int level[64], int16_t dct[8][8] )
{
ZIG( 0,0,0) ZIG( 1,1,0) ZIG( 2,2,0) ZIG( 3,0,1)
ZIG( 4,1,1) ZIG( 5,3,0) ZIG( 6,4,0) ZIG( 7,2,1)
ZIG( 8,0,2) ZIG( 9,3,1) ZIG(10,5,0) ZIG(11,6,0)
ZIG(12,7,0) ZIG(13,4,1) ZIG(14,1,2) ZIG(15,0,3)
ZIG(16,2,2) ZIG(17,5,1) ZIG(18,6,1) ZIG(19,7,1)
ZIG(20,3,2) ZIG(21,1,3) ZIG(22,0,4) ZIG(23,2,3)
ZIG(24,4,2) ZIG(25,5,2) ZIG(26,6,2) ZIG(27,7,2)
ZIG(28,3,3) ZIG(29,1,4) ZIG(30,0,5) ZIG(31,2,4)
ZIG(32,4,3) ZIG(33,5,3) ZIG(34,6,3) ZIG(35,7,3)
ZIG(36,3,4) ZIG(37,1,5) ZIG(38,0,6) ZIG(39,2,5)
ZIG(40,4,4) ZIG(41,5,4) ZIG(42,6,4) ZIG(43,7,4)
ZIG(44,3,5) ZIG(45,1,6) ZIG(46,2,6) ZIG(47,4,5)
ZIG(48,5,5) ZIG(49,6,5) ZIG(50,7,5) ZIG(51,3,6)
ZIG(52,0,7) ZIG(53,1,7) ZIG(54,4,6) ZIG(55,5,6)
ZIG(56,6,6) ZIG(57,7,6) ZIG(58,2,7) ZIG(59,3,7)
ZIG(60,4,7) ZIG(61,5,7) ZIG(62,6,7) ZIG(63,7,7)
}
static void zigzag_scan_4x4_frame( int level[16], int16_t dct[4][4] )
{
ZIG( 0,0,0) ZIG( 1,0,1) ZIG( 2,1,0) ZIG( 3,2,0)
ZIG( 4,1,1) ZIG( 5,0,2) ZIG( 6,0,3) ZIG( 7,1,2)
ZIG( 8,2,1) ZIG( 9,3,0) ZIG(10,3,1) ZIG(11,2,2)
ZIG(12,1,3) ZIG(13,2,3) ZIG(14,3,2) ZIG(15,3,3)
}
static void zigzag_scan_4x4_field( int level[16], int16_t dct[4][4] )
{
ZIG( 0,0,0) ZIG( 1,1,0) ZIG( 2,0,1) ZIG( 3,2,0)
ZIG( 4,3,0) ZIG( 5,1,1) ZIG( 6,2,1) ZIG( 7,3,1)
ZIG( 8,0,2) ZIG( 9,1,2) ZIG(10,2,2) ZIG(11,3,2)
ZIG(12,0,3) ZIG(13,1,3) ZIG(14,2,3) ZIG(15,3,3)
}
static void zigzag_scan_4x4ac_frame( int level[15], int16_t dct[4][4] )
{
ZIG( 0,0,1) ZIG( 1,1,0) ZIG( 2,2,0)
ZIG( 3,1,1) ZIG( 4,0,2) ZIG( 5,0,3) ZIG( 6,1,2)
ZIG( 7,2,1) ZIG( 8,3,0) ZIG( 9,3,1) ZIG(10,2,2)
ZIG(11,1,3) ZIG(12,2,3) ZIG(13,3,2) ZIG(14,3,3)
}
static void zigzag_scan_4x4ac_field( int level[15], int16_t dct[4][4] )
{
ZIG( 0,1,0) ZIG( 1,0,1) ZIG( 2,2,0)
ZIG( 3,3,0) ZIG( 4,1,1) ZIG( 5,2,1) ZIG( 6,3,1)
ZIG( 7,0,2) ZIG( 8,1,2) ZIG( 9,2,2) ZIG(10,3,2)
ZIG(11,0,3) ZIG(12,1,3) ZIG(13,2,3) ZIG(14,3,3)
}
#undef ZIG
#define ZIG(i,y,x) {\
int oe = x+y*FENC_STRIDE;\
int od = x+y*FDEC_STRIDE;\
level[i] = p_src[oe] - p_dst[od];\
p_dst[od] = p_src[oe];\
}
static void zigzag_sub_4x4_frame( int level[16], const uint8_t *p_src, uint8_t *p_dst )
{
ZIG( 0,0,0) ZIG( 1,0,1) ZIG( 2,1,0) ZIG( 3,2,0)
ZIG( 4,1,1) ZIG( 5,0,2) ZIG( 6,0,3) ZIG( 7,1,2)
ZIG( 8,2,1) ZIG( 9,3,0) ZIG(10,3,1) ZIG(11,2,2)
ZIG(12,1,3) ZIG(13,2,3) ZIG(14,3,2) ZIG(15,3,3)
}
static void zigzag_sub_4x4_field( int level[16], const uint8_t *p_src, uint8_t *p_dst )
{
ZIG( 0,0,0) ZIG( 1,1,0) ZIG( 2,0,1) ZIG( 3,2,0)
ZIG( 4,3,0) ZIG( 5,1,1) ZIG( 6,2,1) ZIG( 7,3,1)
ZIG( 8,0,2) ZIG( 9,1,2) ZIG(10,2,2) ZIG(11,3,2)
ZIG(12,0,3) ZIG(13,1,3) ZIG(14,2,3) ZIG(15,3,3)
}
static void zigzag_sub_4x4ac_frame( int level[15], const uint8_t *p_src, uint8_t *p_dst )
{
ZIG( 0,0,1) ZIG( 1,1,0) ZIG( 2,2,0)
ZIG( 3,1,1) ZIG( 4,0,2) ZIG( 5,0,3) ZIG( 6,1,2)
ZIG( 7,2,1) ZIG( 8,3,0) ZIG( 9,3,1) ZIG(10,2,2)
ZIG(11,1,3) ZIG(12,2,3) ZIG(13,3,2) ZIG(14,3,3)
}
static void zigzag_sub_4x4ac_field( int level[15], const uint8_t *p_src, uint8_t *p_dst )
{
ZIG( 0,1,0) ZIG( 1,0,1) ZIG( 2,2,0)
ZIG( 3,3,0) ZIG( 4,1,1) ZIG( 5,2,1) ZIG( 6,3,1)
ZIG( 7,0,2) ZIG( 8,1,2) ZIG( 9,2,2) ZIG(10,3,2)
ZIG(11,0,3) ZIG(12,1,3) ZIG(13,2,3) ZIG(14,3,3)
}
#undef ZIG
void x264_zigzag_init( int cpu, x264_zigzag_function_t *pf, int b_interlaced )
{
if( b_interlaced )
{
pf->scan_8x8 = zigzag_scan_8x8_field;
pf->scan_4x4 = zigzag_scan_4x4_field;
pf->scan_4x4ac = zigzag_scan_4x4ac_field;
pf->sub_4x4 = zigzag_sub_4x4_field;
pf->sub_4x4ac = zigzag_sub_4x4ac_field;
#ifdef HAVE_MMX
#ifdef ARCH_X86
if( cpu&X264_CPU_MMX )
pf->scan_4x4 = x264_zigzag_scan_4x4_field_mmx;
#endif
#ifdef ARCH_X86_64
if( cpu&X264_CPU_SSE2 )
pf->scan_4x4 = x264_zigzag_scan_4x4_field_sse2;
#endif
#endif
}
else
{
pf->scan_8x8 = zigzag_scan_8x8_frame;
pf->scan_4x4 = zigzag_scan_4x4_frame;
pf->scan_4x4ac = zigzag_scan_4x4ac_frame;
pf->sub_4x4 = zigzag_sub_4x4_frame;
pf->sub_4x4ac = zigzag_sub_4x4ac_frame;
}
}