123 lines
4.5 KiB
C
123 lines
4.5 KiB
C
/*****************************************************************************
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* dct.h: h264 encoder library
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*****************************************************************************
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* Copyright (C) 2003 Laurent Aimar
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* $Id: dct.h,v 1.1 2004/06/03 19:27:06 fenrir Exp $
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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*
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* This program is CC_free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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#ifndef _DCT_H
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#define _DCT_H 1
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/* the inverse of the scaling factors introduced by 8x8 fdct */
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#define W(i) (i==0 ? FIX8(1.0000) :\
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i==1 ? FIX8(0.8859) :\
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i==2 ? FIX8(1.6000) :\
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i==3 ? FIX8(0.9415) :\
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i==4 ? FIX8(1.2651) :\
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i==5 ? FIX8(1.1910) :0)
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static const int x264_dct8_weight_tab[64] = {
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W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
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W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
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W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
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W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1)
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};
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#undef W
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/* inverse squared */
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#define W(i) (i==0 ? FIX8(3.125) :\
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i==1 ? FIX8(1.25) :\
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i==2 ? FIX8(0.5) :0)
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static const int x264_dct4_weight2_tab[16] = {
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W(0), W(1), W(0), W(1),
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W(1), W(2), W(1), W(2),
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W(0), W(1), W(0), W(1),
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W(1), W(2), W(1), W(2)
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};
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#undef W
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#define W(i) (i==0 ? FIX8(1.00000) :\
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i==1 ? FIX8(0.78487) :\
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i==2 ? FIX8(2.56132) :\
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i==3 ? FIX8(0.88637) :\
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i==4 ? FIX8(1.60040) :\
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i==5 ? FIX8(1.41850) :0)
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static const int x264_dct8_weight2_tab[64] = {
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W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
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W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
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W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
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W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
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W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1)
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};
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#undef W
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extern int x264_dct4_weight2_zigzag[2][16]; // [2] = {frame, field}
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extern int x264_dct8_weight2_zigzag[2][64];
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typedef struct
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{
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// pix1 stride = FENC_STRIDE
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// pix2 stride = FDEC_STRIDE
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// p_dst stride = FDEC_STRIDE
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void (*sub4x4_dct) ( int16_t dct[4][4], uint8_t *pix1, uint8_t *pix2 );
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void (*add4x4_idct) ( uint8_t *p_dst, int16_t dct[4][4] );
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void (*sub8x8_dct) ( int16_t dct[4][4][4], uint8_t *pix1, uint8_t *pix2 );
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void (*add8x8_idct) ( uint8_t *p_dst, int16_t dct[4][4][4] );
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void (*sub16x16_dct) ( int16_t dct[16][4][4], uint8_t *pix1, uint8_t *pix2 );
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void (*add16x16_idct)( uint8_t *p_dst, int16_t dct[16][4][4] );
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void (*sub8x8_dct8) ( int16_t dct[8][8], uint8_t *pix1, uint8_t *pix2 );
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void (*add8x8_idct8) ( uint8_t *p_dst, int16_t dct[8][8] );
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void (*sub16x16_dct8) ( int16_t dct[4][8][8], uint8_t *pix1, uint8_t *pix2 );
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void (*add16x16_idct8)( uint8_t *p_dst, int16_t dct[4][8][8] );
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void (*dct4x4dc) ( int16_t d[4][4] );
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void (*idct4x4dc)( int16_t d[4][4] );
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void (*dct2x2dc) ( int16_t d[2][2] );
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void (*idct2x2dc)( int16_t d[2][2] );
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} x264_dct_function_t;
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typedef struct
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{
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void (*scan_8x8)( int level[64], int16_t dct[8][8] );
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void (*scan_4x4)( int level[16], int16_t dct[4][4] );
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void (*scan_4x4ac)( int level[15], int16_t dct[4][4] );
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void (*sub_4x4)( int level[16], const uint8_t *p_src, uint8_t *p_dst );
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void (*sub_4x4ac)( int level[15], const uint8_t *p_src, uint8_t *p_dst );
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} x264_zigzag_function_t;
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void x264_dct_init( int cpu, x264_dct_function_t *dctf );
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void x264_dct_init_weights( void );
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void x264_zigzag_init( int cpu, x264_zigzag_function_t *pf, int b_interlaced );
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#endif
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