dct.h
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Audio
开发平台:
Visual C++
- /*****************************************************************************
- * dct.h: h264 encoder library
- *****************************************************************************
- * Copyright (C) 2004-2008 Loren Merritt <lorenm@u.washington.edu>
- *
- * 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.
- *****************************************************************************/
- #ifndef X264_DCT_H
- #define X264_DCT_H
- /* the inverse of the scaling factors introduced by 8x8 fdct */
- #define W(i) (i==0 ? FIX8(1.0000) :
- i==1 ? FIX8(0.8859) :
- i==2 ? FIX8(1.6000) :
- i==3 ? FIX8(0.9415) :
- i==4 ? FIX8(1.2651) :
- i==5 ? FIX8(1.1910) :0)
- static const uint16_t x264_dct8_weight_tab[64] = {
- W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
- W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
- W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
- W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1)
- };
- #undef W
- /* inverse squared */
- #define W(i) (i==0 ? FIX8(3.125) :
- i==1 ? FIX8(1.25) :
- i==2 ? FIX8(0.5) :0)
- static const uint16_t x264_dct4_weight2_tab[16] = {
- W(0), W(1), W(0), W(1),
- W(1), W(2), W(1), W(2),
- W(0), W(1), W(0), W(1),
- W(1), W(2), W(1), W(2)
- };
- #undef W
- #define W(i) (i==0 ? FIX8(1.00000) :
- i==1 ? FIX8(0.78487) :
- i==2 ? FIX8(2.56132) :
- i==3 ? FIX8(0.88637) :
- i==4 ? FIX8(1.60040) :
- i==5 ? FIX8(1.41850) :0)
- static const uint16_t x264_dct8_weight2_tab[64] = {
- W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
- W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
- W(0), W(3), W(4), W(3), W(0), W(3), W(4), W(3),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1),
- W(4), W(5), W(2), W(5), W(4), W(5), W(2), W(5),
- W(3), W(1), W(5), W(1), W(3), W(1), W(5), W(1)
- };
- #undef W
- extern int x264_dct4_weight2_zigzag[2][16]; // [2] = {frame, field}
- extern int x264_dct8_weight2_zigzag[2][64];
- typedef struct
- {
- // pix1 stride = FENC_STRIDE
- // pix2 stride = FDEC_STRIDE
- // p_dst stride = FDEC_STRIDE
- void (*sub4x4_dct) ( int16_t dct[4][4], uint8_t *pix1, uint8_t *pix2 );
- void (*add4x4_idct) ( uint8_t *p_dst, int16_t dct[4][4] );
- void (*sub8x8_dct) ( int16_t dct[4][4][4], uint8_t *pix1, uint8_t *pix2 );
- void (*add8x8_idct) ( uint8_t *p_dst, int16_t dct[4][4][4] );
- void (*sub16x16_dct) ( int16_t dct[16][4][4], uint8_t *pix1, uint8_t *pix2 );
- void (*add16x16_idct)( uint8_t *p_dst, int16_t dct[16][4][4] );
- void (*sub8x8_dct8) ( int16_t dct[8][8], uint8_t *pix1, uint8_t *pix2 );
- void (*add8x8_idct8) ( uint8_t *p_dst, int16_t dct[8][8] );
- void (*sub16x16_dct8) ( int16_t dct[4][8][8], uint8_t *pix1, uint8_t *pix2 );
- void (*add16x16_idct8)( uint8_t *p_dst, int16_t dct[4][8][8] );
- void (*dct4x4dc) ( int16_t d[4][4] );
- void (*idct4x4dc)( int16_t d[4][4] );
- void (*dct2x2dc) ( int16_t d[2][2] );
- void (*idct2x2dc)( int16_t d[2][2] );
- } x264_dct_function_t;
- typedef struct
- {
- void (*scan_8x8)( int16_t level[64], int16_t dct[8][8] );
- void (*scan_4x4)( int16_t level[16], int16_t dct[4][4] );
- void (*sub_4x4)( int16_t level[16], const uint8_t *p_src, uint8_t *p_dst );
- } x264_zigzag_function_t;
- void x264_dct_init( int cpu, x264_dct_function_t *dctf );
- void x264_dct_init_weights( void );
- void x264_zigzag_init( int cpu, x264_zigzag_function_t *pf, int b_interlaced );
- #endif