2 * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_DIRAC_DWT_H
22 #define AVCODEC_DIRAC_DWT_H
27 typedef short IDWTELEM;
29 #define MAX_DWT_SUPPORT 8
30 #define MAX_DECOMPOSITIONS 8
32 typedef struct DWTCompose {
33 uint8_t *b[MAX_DWT_SUPPORT];
37 typedef struct DWTPlane {
48 // Possible prototypes for vertical_compose functions
49 typedef void (*vertical_compose_2tap)(uint8_t *b0, uint8_t *b1, int width);
50 typedef void (*vertical_compose_3tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, int width);
51 typedef void (*vertical_compose_5tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, uint8_t *b3, uint8_t *b4, int width);
52 typedef void (*vertical_compose_9tap)(uint8_t *dst, uint8_t *b[8], int width);
54 typedef struct DWTContext {
60 int decomposition_count;
63 void (*spatial_compose)(struct DWTContext *cs, int level, int width, int height, int stride);
64 void (*vertical_compose_l0)(void);
65 void (*vertical_compose_h0)(void);
66 void (*vertical_compose_l1)(void);
67 void (*vertical_compose_h1)(void);
68 void (*vertical_compose)(void); ///< one set of lowpass and highpass combined
69 void (*horizontal_compose)(uint8_t *b, uint8_t *tmp, int width);
71 DWTCompose cs[MAX_DECOMPOSITIONS];
87 // -1 if an error occurred, e.g. the dwt_type isn't recognized
88 int ff_spatial_idwt_init(DWTContext *d, DWTPlane *p, enum dwt_type type,
89 int decomposition_count, int bit_depth);
90 void ff_spatial_idwt_init_x86(DWTContext *d, enum dwt_type type);
92 void ff_spatial_idwt_slice2(DWTContext *d, int y);
94 // shared stuff for simd optimizations
95 #define COMPOSE_53iL0(b0, b1, b2)\
96 (b1 - ((int)(b0 + (unsigned)(b2) + 2) >> 2))
98 #define COMPOSE_DIRAC53iH0(b0, b1, b2)\
99 (b1 + ((int)(b0 + (unsigned)(b2) + 1) >> 1))
101 #define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\
102 (b2 + ((int)(-b0 + 9U*b1 + 9U*b3 - b4 + 8) >> 4))
104 #define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\
105 (b2 - ((-b0 + 9*b1 + 9*b3 - b4 + 16) >> 5))
107 #define COMPOSE_HAARiL0(b0, b1)\
108 (b0 - ((b1 + 1) >> 1))
110 #define COMPOSE_HAARiH0(b0, b1)\
113 #define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
114 (b4 - ((int)(-8*(b0+(unsigned)b8) + 21*(b1+(unsigned)b7) - 46*(b2+(unsigned)b6) + 161*(b3+(unsigned)b5) + 128) >> 8))
116 #define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
117 (b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 25*(b2+(unsigned)b6) + 81*(b3+(unsigned)b5) + 128) >> 8))
119 #define COMPOSE_DAUB97iL1(b0, b1, b2)\
120 (b1 - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12))
122 #define COMPOSE_DAUB97iH1(b0, b1, b2)\
123 (b1 - ((int)( 113*(b0 + (unsigned)b2) + 64) >> 7))
125 #define COMPOSE_DAUB97iL0(b0, b1, b2)\
126 (b1 + ((int)( 217*(b0 + (unsigned)b2) + 2048) >> 12))
128 #define COMPOSE_DAUB97iH0(b0, b1, b2)\
129 (b1 + ((int)(6497*(b0 + (unsigned)b2) + 2048) >> 12))
132 #endif /* AVCODEC_DWT_H */