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1 : | edgomez | 1382 | /***************************************************************************** |
2 : | * | ||
3 : | * XVID MPEG-4 VIDEO CODEC | ||
4 : | * - Postprocessing functions - | ||
5 : | * | ||
6 : | syskin | 1437 | * Copyright(C) 2003-2004 Michael Militzer <isibaar@xvid.org> |
7 : | * 2004 Marc Fauconneau | ||
8 : | edgomez | 1382 | * |
9 : | * This program is free software ; you can redistribute it and/or modify | ||
10 : | * it under the terms of the GNU General Public License as published by | ||
11 : | * the Free Software Foundation ; either version 2 of the License, or | ||
12 : | * (at your option) any later version. | ||
13 : | * | ||
14 : | * This program is distributed in the hope that it will be useful, | ||
15 : | * but WITHOUT ANY WARRANTY ; without even the implied warranty of | ||
16 : | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 : | * GNU General Public License for more details. | ||
18 : | * | ||
19 : | * You should have received a copy of the GNU General Public License | ||
20 : | * along with this program ; if not, write to the Free Software | ||
21 : | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
22 : | * | ||
23 : | syskin | 1437 | * $Id: postprocessing.c,v 1.4 2004-04-18 07:55:11 syskin Exp $ |
24 : | edgomez | 1382 | * |
25 : | ****************************************************************************/ | ||
26 : | |||
27 : | #include <stdlib.h> | ||
28 : | #include <string.h> | ||
29 : | #include <math.h> | ||
30 : | |||
31 : | #include "../portab.h" | ||
32 : | #include "../global.h" | ||
33 : | #include "image.h" | ||
34 : | #include "../utils/emms.h" | ||
35 : | #include "postprocessing.h" | ||
36 : | |||
37 : | suxen_drol | 1397 | /* function pointers */ |
38 : | IMAGEBRIGHTNESS_PTR image_brightness; | ||
39 : | |||
40 : | |||
41 : | edgomez | 1382 | /* Some useful (and fast) macros |
42 : | Note that the MIN/MAX macros assume signed shift - if your compiler | ||
43 : | doesn't do signed shifts, use the default MIN/MAX macros from global.h */ | ||
44 : | |||
45 : | #define FAST_MAX(x,y) ((x) - ((((x) - (y))>>(32 - 1)) & ((x) - (y)))) | ||
46 : | #define FAST_MIN(x,y) ((x) + ((((y) - (x))>>(32 - 1)) & ((y) - (x)))) | ||
47 : | #define FAST_ABS(x) ((((int)(x)) >> 31) ^ ((int)(x))) - (((int)(x)) >> 31) | ||
48 : | #define ABS(X) (((X)>0)?(X):-(X)) | ||
49 : | |||
50 : | void init_postproc(XVID_POSTPROC *tbls) | ||
51 : | { | ||
52 : | init_deblock(tbls); | ||
53 : | init_noise(tbls); | ||
54 : | } | ||
55 : | |||
56 : | void | ||
57 : | image_postproc(XVID_POSTPROC *tbls, IMAGE * img, int edged_width, | ||
58 : | const MACROBLOCK * mbs, int mb_width, int mb_height, int mb_stride, | ||
59 : | suxen_drol | 1397 | int flags, int brightness, int frame_num, int bvop) |
60 : | edgomez | 1382 | { |
61 : | const int edged_width2 = edged_width /2; | ||
62 : | int i,j; | ||
63 : | int quant; | ||
64 : | syskin | 1437 | int dering = flags & XVID_DERINGY; |
65 : | edgomez | 1382 | |
66 : | /* luma: j,i in block units */ | ||
67 : | if ((flags & XVID_DEBLOCKY)) | ||
68 : | { | ||
69 : | for (j = 1; j < mb_height*2; j++) /* horizontal deblocking */ | ||
70 : | for (i = 0; i < mb_width*2; i++) | ||
71 : | { | ||
72 : | quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; | ||
73 : | syskin | 1437 | deblock8x8_h(tbls, img->y + j*8*edged_width + i*8, edged_width, quant, dering); |
74 : | edgomez | 1382 | } |
75 : | |||
76 : | for (j = 0; j < mb_height*2; j++) /* vertical deblocking */ | ||
77 : | for (i = 1; i < mb_width*2; i++) | ||
78 : | { | ||
79 : | quant = mbs[(j+0)/2*mb_stride + (i/2)].quant; | ||
80 : | syskin | 1437 | deblock8x8_v(tbls, img->y + j*8*edged_width + i*8, edged_width, quant, dering); |
81 : | edgomez | 1382 | } |
82 : | } | ||
83 : | |||
84 : | |||
85 : | /* chroma */ | ||
86 : | if ((flags & XVID_DEBLOCKUV)) | ||
87 : | { | ||
88 : | syskin | 1437 | dering = flags & XVID_DERINGUV; |
89 : | |||
90 : | edgomez | 1382 | for (j = 1; j < mb_height; j++) /* horizontal deblocking */ |
91 : | for (i = 0; i < mb_width; i++) | ||
92 : | { | ||
93 : | quant = mbs[(j+0)*mb_stride + i].quant; | ||
94 : | syskin | 1437 | deblock8x8_h(tbls, img->u + j*8*edged_width2 + i*8, edged_width2, quant, dering); |
95 : | deblock8x8_h(tbls, img->v + j*8*edged_width2 + i*8, edged_width2, quant, dering); | ||
96 : | edgomez | 1382 | } |
97 : | |||
98 : | for (j = 0; j < mb_height; j++) /* vertical deblocking */ | ||
99 : | for (i = 1; i < mb_width; i++) | ||
100 : | { | ||
101 : | quant = mbs[(j+0)*mb_stride + i].quant; | ||
102 : | syskin | 1437 | deblock8x8_v(tbls, img->u + j*8*edged_width2 + i*8, edged_width2, quant, dering); |
103 : | deblock8x8_v(tbls, img->v + j*8*edged_width2 + i*8, edged_width2, quant, dering); | ||
104 : | edgomez | 1382 | } |
105 : | } | ||
106 : | |||
107 : | if (!bvop) | ||
108 : | tbls->prev_quant = mbs->quant; | ||
109 : | |||
110 : | if ((flags & XVID_FILMEFFECT)) | ||
111 : | { | ||
112 : | add_noise(tbls, img->y, img->y, edged_width, mb_width*16, | ||
113 : | mb_height*16, frame_num % 3, tbls->prev_quant); | ||
114 : | } | ||
115 : | suxen_drol | 1397 | |
116 : | if (brightness != 0) { | ||
117 : | image_brightness(img->y, edged_width, mb_width*16, mb_height*16, brightness); | ||
118 : | } | ||
119 : | edgomez | 1382 | } |
120 : | |||
121 : | /******************************************************************************/ | ||
122 : | |||
123 : | void init_deblock(XVID_POSTPROC *tbls) | ||
124 : | { | ||
125 : | int i; | ||
126 : | |||
127 : | for(i = -255; i < 256; i++) { | ||
128 : | tbls->xvid_thresh_tbl[i + 255] = 0; | ||
129 : | if(ABS(i) < THR1) | ||
130 : | tbls->xvid_thresh_tbl[i + 255] = 1; | ||
131 : | tbls->xvid_abs_tbl[i + 255] = ABS(i); | ||
132 : | } | ||
133 : | } | ||
134 : | |||
135 : | #define LOAD_DATA_HOR(x) \ | ||
136 : | /* Load pixel addresses and data for filtering */ \ | ||
137 : | s[0] = *(v[0] = img - 5*stride + x); \ | ||
138 : | s[1] = *(v[1] = img - 4*stride + x); \ | ||
139 : | s[2] = *(v[2] = img - 3*stride + x); \ | ||
140 : | s[3] = *(v[3] = img - 2*stride + x); \ | ||
141 : | s[4] = *(v[4] = img - 1*stride + x); \ | ||
142 : | s[5] = *(v[5] = img + 0*stride + x); \ | ||
143 : | s[6] = *(v[6] = img + 1*stride + x); \ | ||
144 : | s[7] = *(v[7] = img + 2*stride + x); \ | ||
145 : | s[8] = *(v[8] = img + 3*stride + x); \ | ||
146 : | s[9] = *(v[9] = img + 4*stride + x); | ||
147 : | |||
148 : | #define LOAD_DATA_VER(x) \ | ||
149 : | /* Load pixel addresses and data for filtering */ \ | ||
150 : | s[0] = *(v[0] = img + x*stride - 5); \ | ||
151 : | s[1] = *(v[1] = img + x*stride - 4); \ | ||
152 : | s[2] = *(v[2] = img + x*stride - 3); \ | ||
153 : | s[3] = *(v[3] = img + x*stride - 2); \ | ||
154 : | s[4] = *(v[4] = img + x*stride - 1); \ | ||
155 : | s[5] = *(v[5] = img + x*stride + 0); \ | ||
156 : | s[6] = *(v[6] = img + x*stride + 1); \ | ||
157 : | s[7] = *(v[7] = img + x*stride + 2); \ | ||
158 : | s[8] = *(v[8] = img + x*stride + 3); \ | ||
159 : | s[9] = *(v[9] = img + x*stride + 4); | ||
160 : | |||
161 : | syskin | 1437 | #define APPLY_DERING(x) \ |
162 : | *v[x] = (e[x] == 0) ? ( \ | ||
163 : | (e[x-1] == 0) ? ( \ | ||
164 : | (e[x+1] == 0) ? \ | ||
165 : | ((s[x-1]+s[x]*2+s[x+1])>>2) \ | ||
166 : | : ((s[x-1]+s[x])>>1) ) \ | ||
167 : | : ((s[x]+s[x+1])>>1) ) \ | ||
168 : | : s[x]; | ||
169 : | |||
170 : | edgomez | 1382 | #define APPLY_FILTER_CORE \ |
171 : | /* First, decide whether to use default or DC-offset mode */ \ | ||
172 : | \ | ||
173 : | eq_cnt = 0; \ | ||
174 : | \ | ||
175 : | eq_cnt += tbls->xvid_thresh_tbl[s[0] - s[1] + 255]; \ | ||
176 : | eq_cnt += tbls->xvid_thresh_tbl[s[1] - s[2] + 255]; \ | ||
177 : | eq_cnt += tbls->xvid_thresh_tbl[s[2] - s[3] + 255]; \ | ||
178 : | eq_cnt += tbls->xvid_thresh_tbl[s[3] - s[4] + 255]; \ | ||
179 : | eq_cnt += tbls->xvid_thresh_tbl[s[4] - s[5] + 255]; \ | ||
180 : | eq_cnt += tbls->xvid_thresh_tbl[s[5] - s[6] + 255]; \ | ||
181 : | eq_cnt += tbls->xvid_thresh_tbl[s[6] - s[7] + 255]; \ | ||
182 : | eq_cnt += tbls->xvid_thresh_tbl[s[7] - s[8] + 255]; \ | ||
183 : | \ | ||
184 : | if(eq_cnt < THR2) { /* Default mode */ \ | ||
185 : | int a30, a31, a32; \ | ||
186 : | int diff, limit; \ | ||
187 : | \ | ||
188 : | if(tbls->xvid_abs_tbl[(s[4] - s[5]) + 255] < quant) { \ | ||
189 : | a30 = ((s[3]<<1) - s[4] * 5 + s[5] * 5 - (s[6]<<1)); \ | ||
190 : | a31 = ((s[1]<<1) - s[2] * 5 + s[3] * 5 - (s[4]<<1)); \ | ||
191 : | a32 = ((s[5]<<1) - s[6] * 5 + s[7] * 5 - (s[8]<<1)); \ | ||
192 : | \ | ||
193 : | diff = (5 * ((SIGN(a30) * MIN(FAST_ABS(a30), MIN(FAST_ABS(a31), FAST_ABS(a32)))) - a30) + 32) >> 6; \ | ||
194 : | limit = (s[4] - s[5]) / 2; \ | ||
195 : | \ | ||
196 : | if (limit > 0) \ | ||
197 : | diff = (diff < 0) ? 0 : ((diff > limit) ? limit : diff); \ | ||
198 : | else \ | ||
199 : | diff = (diff > 0) ? 0 : ((diff < limit) ? limit : diff); \ | ||
200 : | \ | ||
201 : | *v[4] -= diff; \ | ||
202 : | *v[5] += diff; \ | ||
203 : | } \ | ||
204 : | syskin | 1437 | if (dering) { \ |
205 : | e[0] = (tbls->xvid_abs_tbl[(s[0] - s[1]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
206 : | e[1] = (tbls->xvid_abs_tbl[(s[1] - s[2]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
207 : | e[2] = (tbls->xvid_abs_tbl[(s[2] - s[3]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
208 : | e[3] = (tbls->xvid_abs_tbl[(s[3] - s[4]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
209 : | e[4] = (tbls->xvid_abs_tbl[(s[4] - s[5]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
210 : | e[5] = (tbls->xvid_abs_tbl[(s[5] - s[6]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
211 : | e[6] = (tbls->xvid_abs_tbl[(s[6] - s[7]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
212 : | e[7] = (tbls->xvid_abs_tbl[(s[7] - s[8]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
213 : | e[8] = (tbls->xvid_abs_tbl[(s[8] - s[9]) + 255] > quant + DERING_STRENGTH) ? 1 : 0; \ | ||
214 : | \ | ||
215 : | e[1] |= e[0]; \ | ||
216 : | e[2] |= e[1]; \ | ||
217 : | e[3] |= e[2]; \ | ||
218 : | e[4] |= e[3]; \ | ||
219 : | e[5] |= e[4]; \ | ||
220 : | e[6] |= e[5]; \ | ||
221 : | e[7] |= e[6]; \ | ||
222 : | e[8] |= e[7]; \ | ||
223 : | e[9] = e[8]; \ | ||
224 : | \ | ||
225 : | APPLY_DERING(1) \ | ||
226 : | APPLY_DERING(2) \ | ||
227 : | APPLY_DERING(3) \ | ||
228 : | APPLY_DERING(4) \ | ||
229 : | APPLY_DERING(5) \ | ||
230 : | APPLY_DERING(6) \ | ||
231 : | APPLY_DERING(7) \ | ||
232 : | APPLY_DERING(8) \ | ||
233 : | } \ | ||
234 : | edgomez | 1382 | } \ |
235 : | else { /* DC-offset mode */ \ | ||
236 : | uint8_t p0, p9; \ | ||
237 : | int min, max; \ | ||
238 : | \ | ||
239 : | /* Now decide whether to apply smoothing filter or not */ \ | ||
240 : | max = FAST_MAX(s[1], FAST_MAX(s[2], FAST_MAX(s[3], FAST_MAX(s[4], FAST_MAX(s[5], FAST_MAX(s[6], FAST_MAX(s[7], s[8]))))))); \ | ||
241 : | min = FAST_MIN(s[1], FAST_MIN(s[2], FAST_MIN(s[3], FAST_MIN(s[4], FAST_MIN(s[5], FAST_MIN(s[6], FAST_MIN(s[7], s[8]))))))); \ | ||
242 : | \ | ||
243 : | if(((max-min)) < 2*quant) { \ | ||
244 : | \ | ||
245 : | /* Choose edge pixels */ \ | ||
246 : | p0 = (tbls->xvid_abs_tbl[(s[1] - s[0]) + 255] < quant) ? s[0] : s[1]; \ | ||
247 : | p9 = (tbls->xvid_abs_tbl[(s[8] - s[9]) + 255] < quant) ? s[9] : s[8]; \ | ||
248 : | \ | ||
249 : | *v[1] = (uint8_t) ((6*p0 + (s[1]<<2) + (s[2]<<1) + (s[3]<<1) + s[4] + s[5] + 8) >> 4); \ | ||
250 : | *v[2] = (uint8_t) (((p0<<2) + (s[1]<<1) + (s[2]<<2) + (s[3]<<1) + (s[4]<<1) + s[5] + s[6] + 8) >> 4); \ | ||
251 : | *v[3] = (uint8_t) (((p0<<1) + (s[1]<<1) + (s[2]<<1) + (s[3]<<2) + (s[4]<<1) + (s[5]<<1) + s[6] + s[7] + 8) >> 4); \ | ||
252 : | *v[4] = (uint8_t) ((p0 + s[1] + (s[2]<<1) + (s[3]<<1) + (s[4]<<2) + (s[5]<<1) + (s[6]<<1) + s[7] + s[8] + 8) >> 4); \ | ||
253 : | *v[5] = (uint8_t) ((s[1] + s[2] + (s[3]<<1) + (s[4]<<1) + (s[5]<<2) + (s[6]<<1) + (s[7]<<1) + s[8] + p9 + 8) >> 4); \ | ||
254 : | *v[6] = (uint8_t) ((s[2] + s[3] + (s[4]<<1) + (s[5]<<1) + (s[6]<<2) + (s[7]<<1) + (s[8]<<1) + (p9<<1) + 8) >> 4); \ | ||
255 : | *v[7] = (uint8_t) ((s[3] + s[4] + (s[5]<<1) + (s[6]<<1) + (s[7]<<2) + (s[8]<<1) + (p9<<2) + 8) >> 4); \ | ||
256 : | *v[8] = (uint8_t) ((s[4] + s[5] + (s[6]<<1) + (s[7]<<1) + (s[8]<<2) + 6*p9 + 8) >> 4); \ | ||
257 : | } \ | ||
258 : | } | ||
259 : | |||
260 : | syskin | 1437 | void deblock8x8_h(XVID_POSTPROC *tbls, uint8_t *img, int stride, int quant, int dering) |
261 : | edgomez | 1382 | { |
262 : | int eq_cnt; | ||
263 : | uint8_t *v[10]; | ||
264 : | syskin | 1437 | int s[10]; |
265 : | int e[10]; | ||
266 : | edgomez | 1382 | |
267 : | LOAD_DATA_HOR(0) | ||
268 : | APPLY_FILTER_CORE | ||
269 : | |||
270 : | LOAD_DATA_HOR(1) | ||
271 : | APPLY_FILTER_CORE | ||
272 : | |||
273 : | LOAD_DATA_HOR(2) | ||
274 : | APPLY_FILTER_CORE | ||
275 : | |||
276 : | LOAD_DATA_HOR(3) | ||
277 : | APPLY_FILTER_CORE | ||
278 : | |||
279 : | LOAD_DATA_HOR(4) | ||
280 : | APPLY_FILTER_CORE | ||
281 : | |||
282 : | LOAD_DATA_HOR(5) | ||
283 : | APPLY_FILTER_CORE | ||
284 : | |||
285 : | LOAD_DATA_HOR(6) | ||
286 : | APPLY_FILTER_CORE | ||
287 : | |||
288 : | LOAD_DATA_HOR(7) | ||
289 : | APPLY_FILTER_CORE | ||
290 : | } | ||
291 : | |||
292 : | |||
293 : | syskin | 1437 | void deblock8x8_v(XVID_POSTPROC *tbls, uint8_t *img, int stride, int quant, int dering) |
294 : | edgomez | 1382 | { |
295 : | int eq_cnt; | ||
296 : | uint8_t *v[10]; | ||
297 : | int s[10]; | ||
298 : | syskin | 1437 | int e[10]; |
299 : | edgomez | 1382 | |
300 : | LOAD_DATA_VER(0) | ||
301 : | APPLY_FILTER_CORE | ||
302 : | |||
303 : | LOAD_DATA_VER(1) | ||
304 : | APPLY_FILTER_CORE | ||
305 : | |||
306 : | LOAD_DATA_VER(2) | ||
307 : | APPLY_FILTER_CORE | ||
308 : | |||
309 : | LOAD_DATA_VER(3) | ||
310 : | APPLY_FILTER_CORE | ||
311 : | |||
312 : | LOAD_DATA_VER(4) | ||
313 : | APPLY_FILTER_CORE | ||
314 : | |||
315 : | LOAD_DATA_VER(5) | ||
316 : | APPLY_FILTER_CORE | ||
317 : | |||
318 : | LOAD_DATA_VER(6) | ||
319 : | APPLY_FILTER_CORE | ||
320 : | |||
321 : | LOAD_DATA_VER(7) | ||
322 : | APPLY_FILTER_CORE | ||
323 : | } | ||
324 : | |||
325 : | /****************************************************************************** | ||
326 : | * * | ||
327 : | * Noise code below taken from MPlayer: http://www.mplayerhq.hu/ * | ||
328 : | * Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at> * | ||
329 : | * * | ||
330 : | ******************************************************************************/ | ||
331 : | |||
332 : | #define RAND_N(range) ((int) ((double)range * rand() / (RAND_MAX + 1.0))) | ||
333 : | #define STRENGTH1 12 | ||
334 : | #define STRENGTH2 8 | ||
335 : | |||
336 : | void init_noise(XVID_POSTPROC *tbls) | ||
337 : | { | ||
338 : | int i, j; | ||
339 : | int patt[4] = { -1,0,1,0 }; | ||
340 : | |||
341 : | emms(); | ||
342 : | |||
343 : | srand(123457); | ||
344 : | |||
345 : | for(i = 0, j = 0; i < MAX_NOISE; i++, j++) | ||
346 : | { | ||
347 : | double x1, x2, w, y1, y2; | ||
348 : | |||
349 : | do { | ||
350 : | x1 = 2.0 * rand() / (float) RAND_MAX - 1.0; | ||
351 : | x2 = 2.0 * rand() / (float) RAND_MAX - 1.0; | ||
352 : | w = x1 * x1 + x2 * x2; | ||
353 : | } while (w >= 1.0); | ||
354 : | |||
355 : | w = sqrt((-2.0 * log(w)) / w); | ||
356 : | y1 = x1 * w; | ||
357 : | y2 = x1 * w; | ||
358 : | |||
359 : | y1 *= STRENGTH1 / sqrt(3.0); | ||
360 : | y2 *= STRENGTH2 / sqrt(3.0); | ||
361 : | |||
362 : | y1 /= 2; | ||
363 : | y2 /= 2; | ||
364 : | y1 += patt[j%4] * STRENGTH1 * 0.35; | ||
365 : | y2 += patt[j%4] * STRENGTH2 * 0.35; | ||
366 : | |||
367 : | if (y1 < -128) { | ||
368 : | y1=-128; | ||
369 : | } | ||
370 : | else if (y1 > 127) { | ||
371 : | y1= 127; | ||
372 : | } | ||
373 : | |||
374 : | if (y2 < -128) { | ||
375 : | y2=-128; | ||
376 : | } | ||
377 : | else if (y2 > 127) { | ||
378 : | y2= 127; | ||
379 : | } | ||
380 : | |||
381 : | y1 /= 3.0; | ||
382 : | y2 /= 3.0; | ||
383 : | tbls->xvid_noise1[i] = (int) y1; | ||
384 : | tbls->xvid_noise2[i] = (int) y2; | ||
385 : | |||
386 : | if (RAND_N(6) == 0) { | ||
387 : | j--; | ||
388 : | } | ||
389 : | } | ||
390 : | |||
391 : | for (i = 0; i < MAX_RES; i++) | ||
392 : | for (j = 0; j < 3; j++) { | ||
393 : | tbls->xvid_prev_shift[i][j] = tbls->xvid_noise1 + (rand() & (MAX_SHIFT - 1)); | ||
394 : | tbls->xvid_prev_shift[i][3 + j] = tbls->xvid_noise2 + (rand() & (MAX_SHIFT - 1)); | ||
395 : | } | ||
396 : | } | ||
397 : | |||
398 : | void add_noise(XVID_POSTPROC *tbls, uint8_t *dst, uint8_t *src, int stride, int width, int height, int shiftptr, int quant) | ||
399 : | { | ||
400 : | int x, y; | ||
401 : | int shift = 0; | ||
402 : | int add = (quant < 5) ? 3 : 0; | ||
403 : | int8_t *noise = (quant < 5) ? tbls->xvid_noise2 : tbls->xvid_noise1; | ||
404 : | |||
405 : | for(y = 0; y < height; y++) | ||
406 : | { | ||
407 : | int8_t *src2 = (int8_t *) src; | ||
408 : | |||
409 : | shift = rand() & (MAX_SHIFT - 1); | ||
410 : | |||
411 : | shift &= ~7; | ||
412 : | for(x = 0; x < width; x++) | ||
413 : | { | ||
414 : | const int n = tbls->xvid_prev_shift[y][0 + add][x] + tbls->xvid_prev_shift[y][1 + add][x] + | ||
415 : | tbls->xvid_prev_shift[y][2 + add][x]; | ||
416 : | |||
417 : | dst[x] = src2[x] + ((n * src2[x]) >> 7); | ||
418 : | } | ||
419 : | |||
420 : | tbls->xvid_prev_shift[y][shiftptr + add] = noise + shift; | ||
421 : | |||
422 : | dst += stride; | ||
423 : | src += stride; | ||
424 : | } | ||
425 : | } | ||
426 : | suxen_drol | 1397 | |
427 : | |||
428 : | void image_brightness_c(uint8_t *dst, int stride, int width, int height, int offset) | ||
429 : | { | ||
430 : | int x,y; | ||
431 : | |||
432 : | for(y = 0; y < height; y++) | ||
433 : | { | ||
434 : | for(x = 0; x < width; x++) | ||
435 : | { | ||
436 : | dst[y*stride + x] = CLIP( dst[y*stride + x] + offset, 0, 255); | ||
437 : | } | ||
438 : | } | ||
439 : | } |
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