2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #define MAX_DECOMPOSITIONS 8
30 #define QROOT (1<<QSHIFT)
31 #define LOSSLESS_QLOG -128
34 #define LOG2_OBMC_MAX 8
35 #define OBMC_MAX (1<<(LOG2_OBMC_MAX))
37 /** Used to minimize the amount of memory used in order to optimize cache performance. **/
38 struct slice_buffer_s {
39 DWTELEM * * line; ///< For use by idwt and predict_slices.
40 DWTELEM * * data_stack; ///< Used for internal purposes.
45 DWTELEM * base_buffer; ///< Buffer that this structure is caching.
119 extern void ff_snow_vertical_compose97i(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width);
120 extern void ff_snow_horizontal_compose97i(DWTELEM *b, int width);
121 extern void ff_snow_inner_add_yblock(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);
124 /* C bits used by mmx/sse2/altivec */
126 static always_inline void snow_interleave_line_header(int * i, int width, DWTELEM * low, DWTELEM * high){
130 low[(*i)+1] = low[((*i)+1)>>1];
135 static always_inline void snow_interleave_line_footer(int * i, DWTELEM * low, DWTELEM * high){
136 for (; (*i)>=0; (*i)-=2){
137 low[(*i)+1] = high[(*i)>>1];
138 low[*i] = low[(*i)>>1];
142 static always_inline void snow_horizontal_compose_lift_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
144 dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
147 if((width^lift_high)&1){
148 dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
152 static always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){
154 dst[i] = src[i] - (((-(ref[i] + ref[(i+1)])+W_BO) - 4 * src[i]) >> W_BS);
158 dst[w] = src[w] - (((-2 * ref[w] + W_BO) - 4 * src[w]) >> W_BS);