FFmpeg
dwt.h
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1 /*
2  * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
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.
10  *
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.
15  *
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
19  */
20 
21 #ifndef AVCODEC_DWT_H
22 #define AVCODEC_DWT_H
23 
24 #include <stdint.h>
25 
26 typedef int DWTELEM;
27 typedef short IDWTELEM;
28 
29 #define MAX_DWT_SUPPORT 8
30 #define MAX_DECOMPOSITIONS 8
31 
32 typedef struct DWTCompose {
34 
39  int y;
40 } DWTCompose;
41 
44 typedef struct slice_buffer_s {
52 } slice_buffer;
53 
54 struct DWTContext;
55 
56 // Possible prototypes for vertical_compose functions
57 typedef void (*vertical_compose_2tap)(IDWTELEM *b0, IDWTELEM *b1, int width);
58 typedef void (*vertical_compose_3tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width);
59 typedef void (*vertical_compose_5tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, int width);
61 
62 typedef struct DWTContext {
65  int width;
66  int height;
67  int stride;
69  int support;
70 
71  void (*spatial_compose)(struct DWTContext *cs, int level, int width, int height, int stride);
78 
80  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
81  int width);
83  void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
84  uint8_t **block, int b_w, int b_h, int src_x,
85  int src_y, int src_stride, slice_buffer *sb,
86  int add, uint8_t *dst8);
87 
89 } DWTContext;
90 
91 enum dwt_type {
102 };
103 
104 // -1 if an error occurred, e.g. the dwt_type isn't recognized
106  int stride, enum dwt_type type, int decomposition_count,
107  IDWTELEM *temp);
108 
109 int ff_spatial_idwt2(IDWTELEM *buffer, int width, int height, int stride,
111 
112 void ff_spatial_idwt_slice2(DWTContext *d, int y);
113 
114 // shared stuff for simd optimiztions
115 #define COMPOSE_53iL0(b0, b1, b2)\
116  (b1 - ((b0 + b2 + 2) >> 2))
117 
118 #define COMPOSE_DIRAC53iH0(b0, b1, b2)\
119  (b1 + ((b0 + b2 + 1) >> 1))
120 
121 #define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\
122  (b2 + ((-b0 + 9*b1 + 9*b3 - b4 + 8) >> 4))
123 
124 #define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\
125  (b2 - ((-b0 + 9*b1 + 9*b3 - b4 + 16) >> 5))
126 
127 #define COMPOSE_HAARiL0(b0, b1)\
128  (b0 - ((b1 + 1) >> 1))
129 
130 #define COMPOSE_HAARiH0(b0, b1)\
131  (b0 + b1)
132 
133 #define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
134  (b4 - ((-8*(b0+b8) + 21*(b1+b7) - 46*(b2+b6) + 161*(b3+b5) + 128) >> 8))
135 
136 #define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
137  (b4 + ((-2*(b0+b8) + 10*(b1+b7) - 25*(b2+b6) + 81*(b3+b5) + 128) >> 8))
138 
139 #define COMPOSE_DAUB97iL1(b0, b1, b2)\
140  (b1 - ((1817*(b0 + b2) + 2048) >> 12))
141 
142 #define COMPOSE_DAUB97iH1(b0, b1, b2)\
143  (b1 - (( 113*(b0 + b2) + 64) >> 7))
144 
145 #define COMPOSE_DAUB97iL0(b0, b1, b2)\
146  (b1 + (( 217*(b0 + b2) + 2048) >> 12))
147 
148 #define COMPOSE_DAUB97iH0(b0, b1, b2)\
149  (b1 + ((6497*(b0 + b2) + 2048) >> 12))
150 
151 
152 
153 #define DWT_97 0
154 #define DWT_53 1
155 
156 #define liftS lift
157 #define W_AM 3
158 #define W_AO 0
159 #define W_AS 1
160 
161 #undef liftS
162 #define W_BM 1
163 #define W_BO 8
164 #define W_BS 4
165 
166 #define W_CM 1
167 #define W_CO 0
168 #define W_CS 0
169 
170 #define W_DM 3
171 #define W_DO 4
172 #define W_DS 3
173 
174 #define slice_buffer_get_line(slice_buf, line_num) \
175  ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num] \
176  : ff_slice_buffer_load_line((slice_buf), \
177  (line_num)))
178 
179 int ff_slice_buffer_init(slice_buffer *buf, int line_count,
180  int max_allocated_lines, int line_width,
181  IDWTELEM *base_buffer);
186 
188  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
189  int width);
191 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
192  uint8_t **block, int b_w, int b_h, int src_x,
193  int src_y, int src_stride, slice_buffer *sb,
194  int add, uint8_t *dst8);
195 
196 int ff_w53_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
197 int ff_w97_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
198 
199 void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
200  int type, int decomposition_count);
201 
203  int height, int stride_line, int type,
204  int decomposition_count);
206  slice_buffer *slice_buf, IDWTELEM *temp,
207  int width, int height, int stride_line,
208  int type, int decomposition_count, int y);
210  int stride, int type, int decomposition_count);
211 
212 void ff_dwt_init(DWTContext *c);
214 
215 #endif /* AVCODEC_DWT_H */