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))
44 /** Used to minimize the amount of memory used in order to optimize cache performance. **/
45 struct slice_buffer_s {
46 DWTELEM * * line; ///< For use by idwt and predict_slices.
47 DWTELEM * * data_stack; ///< Used for internal purposes.
52 DWTELEM * base_buffer; ///< Buffer that this structure is caching.
126 extern void ff_snow_vertical_compose97i(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width);
127 extern void ff_snow_horizontal_compose97i(DWTELEM *b, int width);
128 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);
130 #ifdef CONFIG_SNOW_ENCODER
131 int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
132 int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
134 static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
135 static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
138 /* C bits used by mmx/sse2/altivec */
140 static av_always_inline void snow_interleave_line_header(int * i, int width, DWTELEM * low, DWTELEM * high){
144 low[(*i)+1] = low[((*i)+1)>>1];
149 static av_always_inline void snow_interleave_line_footer(int * i, DWTELEM * low, DWTELEM * high){
150 for (; (*i)>=0; (*i)-=2){
151 low[(*i)+1] = high[(*i)>>1];
152 low[*i] = low[(*i)>>1];
156 static av_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){
158 dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
161 if((width^lift_high)&1){
162 dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
166 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){
168 dst[i] = src[i] - (((-(ref[i] + ref[(i+1)])+W_BO) - 4 * src[i]) >> W_BS);
172 dst[w] = src[w] - (((-2 * ref[w] + W_BO) - 4 * src[w]) >> W_BS);