e9b988986c7f33e1055bdef2582e69d5cea9260c
[libav.git] / libavcodec / snow.h
1 /*
2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef FFMPEG_SNOW_H
23 #define FFMPEG_SNOW_H
24
25 #include "dsputil.h"
26
27 #define MID_STATE 128
28
29 #define MAX_DECOMPOSITIONS 8
30 #define MAX_PLANES 4
31 #define QSHIFT 5
32 #define QROOT (1<<QSHIFT)
33 #define LOSSLESS_QLOG -128
34 #define FRAC_BITS 4
35 #define MAX_REF_FRAMES 8
36
37 #define LOG2_OBMC_MAX 8
38 #define OBMC_MAX (1<<(LOG2_OBMC_MAX))
39
40 #define DWT_97 0
41 #define DWT_53 1
42
43 /** Used to minimize the amount of memory used in order to optimize cache performance. **/
44 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 };
53
54 #define liftS lift
55 #if 1
56 #define W_AM 3
57 #define W_AO 0
58 #define W_AS 1
59
60 #undef liftS
61 #define W_BM 1
62 #define W_BO 8
63 #define W_BS 4
64
65 #define W_CM 1
66 #define W_CO 0
67 #define W_CS 0
68
69 #define W_DM 3
70 #define W_DO 4
71 #define W_DS 3
72 #elif 0
73 #define W_AM 55
74 #define W_AO 16
75 #define W_AS 5
76
77 #define W_BM 3
78 #define W_BO 32
79 #define W_BS 6
80
81 #define W_CM 127
82 #define W_CO 64
83 #define W_CS 7
84
85 #define W_DM 7
86 #define W_DO 8
87 #define W_DS 4
88 #elif 0
89 #define W_AM 97
90 #define W_AO 32
91 #define W_AS 6
92
93 #define W_BM 63
94 #define W_BO 512
95 #define W_BS 10
96
97 #define W_CM 13
98 #define W_CO 8
99 #define W_CS 4
100
101 #define W_DM 15
102 #define W_DO 16
103 #define W_DS 5
104
105 #else
106
107 #define W_AM 203
108 #define W_AO 64
109 #define W_AS 7
110
111 #define W_BM 217
112 #define W_BO 2048
113 #define W_BS 12
114
115 #define W_CM 113
116 #define W_CO 64
117 #define W_CS 7
118
119 #define W_DM 227
120 #define W_DO 128
121 #define W_DS 9
122 #endif
123
124 extern void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, int width);
125 extern void ff_snow_horizontal_compose97i(IDWTELEM *b, int width);
126 extern void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8);
127
128 #ifdef CONFIG_SNOW_ENCODER
129 int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
130 int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
131 #else
132 static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
133 static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
134 #endif
135
136 /* C bits used by mmx/sse2/altivec */
137
138 static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){
139 (*i) = (width) - 2;
140
141 if (width & 1){
142 low[(*i)+1] = low[((*i)+1)>>1];
143 (*i)--;
144 }
145 }
146
147 static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){
148 for (; (*i)>=0; (*i)-=2){
149 low[(*i)+1] = high[(*i)>>1];
150 low[*i] = low[(*i)>>1];
151 }
152 }
153
154 static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
155 for(; i<w; i++){
156 dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
157 }
158
159 if((width^lift_high)&1){
160 dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
161 }
162 }
163
164 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){
165 for(; i<w; i++){
166 dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
167 }
168
169 if(width&1){
170 dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
171 }
172 }
173
174 #endif /* FFMPEG_SNOW_H */