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 AVCODEC_SNOW_H
23#define AVCODEC_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. **/
44struct 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
124void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, int width);
125void ff_snow_horizontal_compose97i(IDWTELEM *b, int width);
126void 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#if CONFIG_SNOW_ENCODER
129int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
130int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
131#else
132static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0); return 0;}
133static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0); return 0;}
134#endif
135
136/* C bits used by mmx/sse2/altivec */
137
138static 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
147static 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
154static 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
164static 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 /* AVCODEC_SNOW_H */
175