dct.c
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Visual C++
- /*****************************************************************************
- * dct.c: h264 encoder library
- *****************************************************************************
- * Copyright (C) 2003-2008 x264 project
- *
- * Authors: Loren Merritt <lorenm@u.washington.edu>
- * Laurent Aimar <fenrir@via.ecp.fr>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
- *****************************************************************************/
- #include "common.h"
- #ifdef HAVE_MMX
- # include "x86/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];
- /*
- * 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] = x264_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] = x264_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->add4x4_idct = x264_add4x4_idct_mmx;
- dctf->dct4x4dc = x264_dct4x4dc_mmx;
- dctf->idct4x4dc = x264_idct4x4dc_mmx;
- #ifndef ARCH_X86_64
- dctf->sub8x8_dct = x264_sub8x8_dct_mmx;
- dctf->sub16x16_dct = x264_sub16x16_dct_mmx;
- dctf->add8x8_idct = x264_add8x8_idct_mmx;
- dctf->add16x16_idct = x264_add16x16_idct_mmx;
- 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
- }
- 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;
- dctf->sub8x8_dct = x264_sub8x8_dct_sse2;
- dctf->sub16x16_dct = x264_sub16x16_dct_sse2;
- dctf->add8x8_idct = x264_add8x8_idct_sse2;
- dctf->add16x16_idct = x264_add16x16_idct_sse2;
- }
- #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->add4x4_idct = x264_add4x4_idct_altivec;
- dctf->add8x8_idct = x264_add8x8_idct_altivec;
- dctf->add16x16_idct = x264_add16x16_idct_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] ];
- }
- }
- // gcc pessimizes multi-dimensional arrays here, even with constant indices
- #define ZIG(i,y,x) level[i] = dct[0][x*8+y];
- static void zigzag_scan_8x8_frame( int16_t 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( int16_t 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)
- }
- #undef ZIG
- #define ZIG(i,y,x) level[i] = dct[0][x*4+y];
- static void zigzag_scan_4x4_frame( int16_t 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( int16_t level[16], int16_t dct[4][4] )
- {
- *(uint32_t*)level = *(uint32_t*)dct;
- ZIG(2,0,1) ZIG(3,2,0) ZIG(4,3,0) ZIG(5,1,1)
- *(uint32_t*)(level+6) = *(uint32_t*)(*dct+6);
- *(uint64_t*)(level+8) = *(uint64_t*)(*dct+8);
- *(uint64_t*)(level+12) = *(uint64_t*)(*dct+12);
- }
- #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];
- }
- #define COPY4x4
- *(uint32_t*)(p_dst+0*FDEC_STRIDE) = *(uint32_t*)(p_src+0*FENC_STRIDE);
- *(uint32_t*)(p_dst+1*FDEC_STRIDE) = *(uint32_t*)(p_src+1*FENC_STRIDE);
- *(uint32_t*)(p_dst+2*FDEC_STRIDE) = *(uint32_t*)(p_src+2*FENC_STRIDE);
- *(uint32_t*)(p_dst+3*FDEC_STRIDE) = *(uint32_t*)(p_src+3*FENC_STRIDE);
- static void zigzag_sub_4x4_frame( int16_t 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)
- COPY4x4
- }
- static void zigzag_sub_4x4_field( int16_t 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)
- COPY4x4
- }
- #undef ZIG
- #undef COPY4x4
- 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->sub_4x4 = zigzag_sub_4x4_field;
- #ifdef HAVE_MMX
- if( cpu&X264_CPU_MMXEXT )
- pf->scan_4x4 = x264_zigzag_scan_4x4_field_mmxext;
- #endif
- #ifdef ARCH_PPC
- if( cpu&X264_CPU_ALTIVEC )
- pf->scan_4x4 = x264_zigzag_scan_4x4_field_altivec;
- #endif
- }
- else
- {
- pf->scan_8x8 = zigzag_scan_8x8_frame;
- pf->scan_4x4 = zigzag_scan_4x4_frame;
- pf->sub_4x4 = zigzag_sub_4x4_frame;
- #ifdef HAVE_MMX
- if( cpu&X264_CPU_MMX )
- pf->scan_4x4 = x264_zigzag_scan_4x4_frame_mmx;
- if( cpu&X264_CPU_MMXEXT )
- pf->scan_8x8 = x264_zigzag_scan_8x8_frame_mmxext;
- if( cpu&X264_CPU_SSE2_IS_FAST )
- pf->scan_8x8 = x264_zigzag_scan_8x8_frame_sse2;
- if( cpu&X264_CPU_SSSE3 )
- {
- pf->sub_4x4 = x264_zigzag_sub_4x4_frame_ssse3;
- pf->scan_8x8 = x264_zigzag_scan_8x8_frame_ssse3;
- }
- if( cpu&X264_CPU_PHADD_IS_FAST )
- pf->scan_4x4 = x264_zigzag_scan_4x4_frame_ssse3;
- #endif
- #ifdef ARCH_PPC
- if( cpu&X264_CPU_ALTIVEC )
- pf->scan_4x4 = x264_zigzag_scan_4x4_frame_altivec;
- #endif
- }
- }