2 * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_SNOW_DWT_H
22 #define AVCODEC_SNOW_DWT_H
27 #include "libavutil/attributes.h"
29 struct MpegEncContext;
32 typedef short IDWTELEM;
34 #define MAX_DECOMPOSITIONS 8
36 typedef struct DWTCompose {
44 /** Used to minimize the amount of memory used in order to
45 * optimize cache performance. **/
46 typedef struct slice_buffer_s {
47 IDWTELEM **line; ///< For use by idwt and predict_slices.
48 IDWTELEM **data_stack; ///< Used for internal purposes.
53 IDWTELEM *base_buffer; ///< Buffer that this structure is caching.
56 struct SnowDWTContext;
58 typedef struct SnowDWTContext {
59 void (*vertical_compose97i)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
60 IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
62 void (*horizontal_compose97i)(IDWTELEM *b, IDWTELEM *temp, int width);
63 void (*inner_add_yblock)(const uint8_t *obmc, const int obmc_stride,
64 uint8_t **block, int b_w, int b_h, int src_x,
65 int src_y, int src_stride, slice_buffer *sb,
66 int add, uint8_t *dst8);
91 #define slice_buffer_get_line(slice_buf, line_num) \
92 ((slice_buf)->line[line_num] ? (slice_buf)->line[line_num] \
93 : ff_slice_buffer_load_line((slice_buf), \
96 /* C bits used by mmx/sse2/altivec */
98 static av_always_inline void snow_interleave_line_header(int *i, int width, IDWTELEM *low, IDWTELEM *high)
103 low[*i + 1] = low[(*i + 1)>>1];
108 static av_always_inline void snow_interleave_line_footer(int *i, IDWTELEM *low, const IDWTELEM *high)
110 for (; *i >= 0; *i -= 2) {
111 low[*i + 1] = high[*i >> 1];
112 low[*i] = low[*i >> 1];
116 static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM *dst, const IDWTELEM *src, const IDWTELEM *ref, int width, int w, int lift_high, int mul, int add, int shift)
119 dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
121 if ((width ^ lift_high) & 1)
122 dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
125 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM *dst, const IDWTELEM *src, const IDWTELEM *ref, int width, int w)
128 dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
131 dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
134 int ff_slice_buffer_init(slice_buffer *buf, int line_count,
135 int max_allocated_lines, int line_width,
136 IDWTELEM *base_buffer);
137 void ff_slice_buffer_release(slice_buffer *buf, int line);
138 void ff_slice_buffer_flush(slice_buffer *buf);
139 void ff_slice_buffer_destroy(slice_buffer *buf);
140 IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line);
142 void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride,
143 uint8_t **block, int b_w, int b_h, int src_x,
144 int src_y, int src_stride, slice_buffer *sb,
145 int add, uint8_t *dst8);
147 int ff_w53_32_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h);
148 int ff_w97_32_c(struct MpegEncContext *v, const uint8_t *pix1, const uint8_t *pix2, ptrdiff_t line_size, int h);
150 void ff_spatial_dwt(int *buffer, int *temp, int width, int height, int stride,
151 int type, int decomposition_count);
153 void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
154 int height, int stride_line, int type,
155 int decomposition_count);
156 void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs,
157 slice_buffer *slice_buf, IDWTELEM *temp,
158 int width, int height, int stride_line,
159 int type, int decomposition_count, int y);
160 void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
161 int stride, int type, int decomposition_count);
163 void ff_dwt_init(SnowDWTContext *c);
164 void ff_dwt_init_x86(SnowDWTContext *c);
166 #endif /* AVCODEC_DWT_H */