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snow_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_SNOW_DWT_H
22 #define AVCODEC_SNOW_DWT_H
23 
24 #include <stdint.h>
25 
26 typedef int DWTELEM;
27 typedef short IDWTELEM;
28 
29 #define MAX_DECOMPOSITIONS 8
30 
31 typedef struct DWTCompose {
36  int y;
37 } DWTCompose;
38 
39 /** Used to minimize the amount of memory used in order to
40  * optimize cache performance. **/
41 typedef struct slice_buffer_s {
42  IDWTELEM **line; ///< For use by idwt and predict_slices.
43  IDWTELEM **data_stack; ///< Used for internal purposes.
48  IDWTELEM *base_buffer; ///< Buffer that this structure is caching.
49 } slice_buffer;
50 
51 struct SnowDWTContext;
52 
53 typedef struct SnowDWTContext {
55  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
56  int width);
58  void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
59  uint8_t **block, int b_w, int b_h, int src_x,
60  int src_y, int src_stride, slice_buffer *sb,
61  int add, uint8_t *dst8);
63 
64 
65 #define DWT_97 0
66 #define DWT_53 1
67 
68 #define liftS lift
69 #define W_AM 3
70 #define W_AO 0
71 #define W_AS 1
72 
73 #undef liftS
74 #define W_BM 1
75 #define W_BO 8
76 #define W_BS 4
77 
78 #define W_CM 1
79 #define W_CO 0
80 #define W_CS 0
81 
82 #define W_DM 3
83 #define W_DO 4
84 #define W_DS 3
85 
86 #define slice_buffer_get_line(slice_buf, line_num) \
87  ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num] \
88  : ff_slice_buffer_load_line((slice_buf), \
89  (line_num)))
90 
91 int ff_slice_buffer_init(slice_buffer *buf, int line_count,
92  int max_allocated_lines, int line_width,
93  IDWTELEM *base_buffer);
98 
100  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
101  int width);
103 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
104  uint8_t **block, int b_w, int b_h, int src_x,
105  int src_y, int src_stride, slice_buffer *sb,
106  int add, uint8_t *dst8);
107 
108 int ff_w53_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
109 int ff_w97_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h);
110 
111 void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
112  int type, int decomposition_count);
113 
115  int height, int stride_line, int type,
116  int decomposition_count);
118  slice_buffer *slice_buf, IDWTELEM *temp,
119  int width, int height, int stride_line,
120  int type, int decomposition_count, int y);
122  int stride, int type, int decomposition_count);
123 
126 
127 #endif /* AVCODEC_DWT_H */