common/dct.h

   1 /*****************************************************************************
   2  * dct.h: transform and zigzag
   3  *****************************************************************************
   4  * Copyright (C) 2004-2019 x264 project
   5  *
   6  * Authors: Loren Merritt <lorenm@u.washington.edu>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
  21  *
  22  * This program is also available under a commercial proprietary license.
  23  * For more information, contact us at licensing@x264.com.
  24  *****************************************************************************/
  25
  26 #ifndef X264_DCT_H
  27 #define X264_DCT_H
  28
  29 typedef struct
  30 {
  31     // pix1  stride = FENC_STRIDE
  32     // pix2  stride = FDEC_STRIDE
  33     // p_dst stride = FDEC_STRIDE
  34     void (*sub4x4_dct) ( dctcoef dct[16], pixel *pix1, pixel *pix2 );
  35     void (*add4x4_idct)( pixel *p_dst, dctcoef dct[16] );
  36
  37     void (*sub8x8_dct)    ( dctcoef dct[4][16], pixel *pix1, pixel *pix2 );
  38     void (*sub8x8_dct_dc) ( dctcoef dct[4], pixel *pix1, pixel *pix2 );
  39     void (*add8x8_idct)   ( pixel *p_dst, dctcoef dct[4][16] );
  40     void (*add8x8_idct_dc)( pixel *p_dst, dctcoef dct[4] );
  41
  42     void (*sub8x16_dct_dc)( dctcoef dct[8], pixel *pix1, pixel *pix2 );
  43
  44     void (*sub16x16_dct)    ( dctcoef dct[16][16], pixel *pix1, pixel *pix2 );
  45     void (*add16x16_idct)   ( pixel *p_dst, dctcoef dct[16][16] );
  46     void (*add16x16_idct_dc)( pixel *p_dst, dctcoef dct[16] );
  47
  48     void (*sub8x8_dct8) ( dctcoef dct[64], pixel *pix1, pixel *pix2 );
  49     void (*add8x8_idct8)( pixel *p_dst, dctcoef dct[64] );
  50
  51     void (*sub16x16_dct8) ( dctcoef dct[4][64], pixel *pix1, pixel *pix2 );
  52     void (*add16x16_idct8)( pixel *p_dst, dctcoef dct[4][64] );
  53
  54     void (*dct4x4dc) ( dctcoef d[16] );
  55     void (*idct4x4dc)( dctcoef d[16] );
  56
  57     void (*dct2x4dc)( dctcoef dct[8], dctcoef dct4x4[8][16] );
  58
  59 } x264_dct_function_t;
  60
  61 typedef struct
  62 {
  63     void (*scan_8x8)( dctcoef level[64], dctcoef dct[64] );
  64     void (*scan_4x4)( dctcoef level[16], dctcoef dct[16] );
  65     int  (*sub_8x8)  ( dctcoef level[64], const pixel *p_src, pixel *p_dst );
  66     int  (*sub_4x4)  ( dctcoef level[16], const pixel *p_src, pixel *p_dst );
  67     int  (*sub_4x4ac)( dctcoef level[16], const pixel *p_src, pixel *p_dst, dctcoef *dc );
  68     void (*interleave_8x8_cavlc)( dctcoef *dst, dctcoef *src, uint8_t *nnz );
  69
  70 } x264_zigzag_function_t;
  71
  72 #define x264_dct_init x264_template(dct_init)
  73 void x264_dct_init( int cpu, x264_dct_function_t *dctf );
  74 #define x264_zigzag_init x264_template(zigzag_init)
  75 void x264_zigzag_init( int cpu, x264_zigzag_function_t *pf_progressive, x264_zigzag_function_t *pf_interlaced );
  76
  77 #endif