2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
5 * This file is part of FFmpeg.
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.
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.
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
29 #define MAX_DECOMPOSITIONS 8
32 #define QROOT (1<<QSHIFT)
33 #define LOSSLESS_QLOG -128
35 #define MAX_REF_FRAMES 8
37 #define LOG2_OBMC_MAX 8
38 #define OBMC_MAX (1<<(LOG2_OBMC_MAX))
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.
51 IDWTELEM * base_buffer; ///< Buffer that this structure is caching.
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);
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);
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);}
136 /* C bits used by mmx/sse2/altivec */
138 static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){
142 low[(*i)+1] = low[((*i)+1)>>1];
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];
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){
156 dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
159 if((width^lift_high)&1){
160 dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
164 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){
166 dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
170 dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
174 #endif /* FFMPEG_SNOW_H */