xref: /third_party/ffmpeg/libavcodec/snow_dwt.h (revision cabdff1a) 
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 <stddef.h>
25#include <stdint.h>
26
27struct MpegEncContext;
28
29typedef int DWTELEM;
30typedef short IDWTELEM;
31
32#define MAX_DECOMPOSITIONS 8
33
34typedef struct DWTCompose {
35    IDWTELEM *b0;
36    IDWTELEM *b1;
37    IDWTELEM *b2;
38    IDWTELEM *b3;
39    int y;
40} DWTCompose;
41
42/** Used to minimize the amount of memory used in order to
43 *  optimize cache performance. **/
44typedef struct slice_buffer_s {
45    IDWTELEM **line;   ///< For use by idwt and predict_slices.
46    IDWTELEM **data_stack;   ///< Used for internal purposes.
47    int data_stack_top;
48    int line_count;
49    int line_width;
50    int data_count;
51    IDWTELEM *base_buffer;  ///< Buffer that this structure is caching.
52} slice_buffer;
53
54struct SnowDWTContext;
55
56typedef struct SnowDWTContext {
57    void (*vertical_compose97i)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
58                                IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
59                                int width);
60    void (*horizontal_compose97i)(IDWTELEM *b, IDWTELEM *temp, int width);
61    void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
62                             uint8_t **block, int b_w, int b_h, int src_x,
63                             int src_y, int src_stride, slice_buffer *sb,
64                             int add, uint8_t *dst8);
65} SnowDWTContext;
66
67
68#define DWT_97 0
69#define DWT_53 1
70
71#define liftS lift
72#define W_AM 3
73#define W_AO 0
74#define W_AS 1
75
76#undef liftS
77#define W_BM 1
78#define W_BO 8
79#define W_BS 4
80
81#define W_CM 1
82#define W_CO 0
83#define W_CS 0
84
85#define W_DM 3
86#define W_DO 4
87#define W_DS 3
88
89#define slice_buffer_get_line(slice_buf, line_num)                          \
90    ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num]              \
91                                 : ff_slice_buffer_load_line((slice_buf),   \
92                                                             (line_num)))
93
94int ff_slice_buffer_init(slice_buffer *buf, int line_count,
95                         int max_allocated_lines, int line_width,
96                         IDWTELEM *base_buffer);
97void ff_slice_buffer_release(slice_buffer *buf, int line);
98void ff_slice_buffer_flush(slice_buffer *buf);
99void ff_slice_buffer_destroy(slice_buffer *buf);
100IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line);
101
102void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
103                              uint8_t **block, int b_w, int b_h, int src_x,
104                              int src_y, int src_stride, slice_buffer *sb,
105                              int add, uint8_t *dst8);
106
107int ff_w53_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h);
108int ff_w97_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, ptrdiff_t line_size, int h);
109
110void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
111                    int type, int decomposition_count);
112
113void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
114                                   int height, int stride_line, int type,
115                                   int decomposition_count);
116void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
117                                    slice_buffer *slice_buf, IDWTELEM *temp,
118                                    int width, int height, int stride_line,
119                                    int type, int decomposition_count, int y);
120void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
121                     int stride, int type, int decomposition_count);
122
123void ff_dwt_init(SnowDWTContext *c);
124void ff_dwt_init_x86(SnowDWTContext *c);
125
126#endif /* AVCODEC_DWT_H */
127