FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/vp3dsp.c
Date: 2025-10-28 12:57:06
Exec Total Coverage
Lines: 267 267 100.0%
Functions: 16 16 100.0%
Branches: 47 48 97.9%
Line Branch Exec Source
1 /*
2 * Copyright (C) 2004 The FFmpeg project
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 /**
22 * @file
23 * Standard C DSP-oriented functions cribbed from the original VP3
24 * source code.
25 */
26
27 #include <string.h>
28
29 #include "config.h"
30 #include "libavutil/attributes.h"
31 #include "libavutil/common.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/avassert.h"
35
36 #include "rnd_avg.h"
37 #include "vp3dsp.h"
38
39 #define IdctAdjustBeforeShift 8
40 #define xC1S7 64277
41 #define xC2S6 60547
42 #define xC3S5 54491
43 #define xC4S4 46341
44 #define xC5S3 36410
45 #define xC6S2 25080
46 #define xC7S1 12785
47
48 #define M(a, b) ((int)((SUINT)(a) * (b)) >> 16)
49
50 1505764 static av_always_inline void idct(uint8_t *dst, ptrdiff_t stride,
51 int16_t *input, int type)
52 {
53 1505764 int16_t *ip = input;
54
55 int A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H;
56 int Ed, Gd, Add, Bdd, Fd, Hd;
57
58 int i;
59
60 /* Inverse DCT on the rows now */
61
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 13551876 for (i = 0; i < 8; i++) {
62 /* Check for non-zero values */
63 12046112 if (ip[0 * 8] | ip[1 * 8] | ip[2 * 8] | ip[3 * 8] |
64
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 12046112 ip[4 * 8] | ip[5 * 8] | ip[6 * 8] | ip[7 * 8]) {
65 2294188 A = M(xC1S7, ip[1 * 8]) + M(xC7S1, ip[7 * 8]);
66 2294188 B = M(xC7S1, ip[1 * 8]) - M(xC1S7, ip[7 * 8]);
67 2294188 C = M(xC3S5, ip[3 * 8]) + M(xC5S3, ip[5 * 8]);
68 2294188 D = M(xC3S5, ip[5 * 8]) - M(xC5S3, ip[3 * 8]);
69
70 2294188 Ad = M(xC4S4, (A - C));
71 2294188 Bd = M(xC4S4, (B - D));
72
73 2294188 Cd = A + C;
74 2294188 Dd = B + D;
75
76 2294188 E = M(xC4S4, (ip[0 * 8] + ip[4 * 8]));
77 2294188 F = M(xC4S4, (ip[0 * 8] - ip[4 * 8]));
78
79 2294188 G = M(xC2S6, ip[2 * 8]) + M(xC6S2, ip[6 * 8]);
80 2294188 H = M(xC6S2, ip[2 * 8]) - M(xC2S6, ip[6 * 8]);
81
82 2294188 Ed = E - G;
83 2294188 Gd = E + G;
84
85 2294188 Add = F + Ad;
86 2294188 Bdd = Bd - H;
87
88 2294188 Fd = F - Ad;
89 2294188 Hd = Bd + H;
90
91 /* Final sequence of operations over-write original inputs. */
92 2294188 ip[0 * 8] = Gd + Cd;
93 2294188 ip[7 * 8] = Gd - Cd;
94
95 2294188 ip[1 * 8] = Add + Hd;
96 2294188 ip[2 * 8] = Add - Hd;
97
98 2294188 ip[3 * 8] = Ed + Dd;
99 2294188 ip[4 * 8] = Ed - Dd;
100
101 2294188 ip[5 * 8] = Fd + Bdd;
102 2294188 ip[6 * 8] = Fd - Bdd;
103 }
104
105 12046112 ip += 1; /* next row */
106 }
107
108 1505764 ip = input;
109
110
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 13551876 for (i = 0; i < 8; i++) {
111 /* Check for non-zero values (bitwise or faster than ||) */
112 12046112 if (ip[1] | ip[2] | ip[3] |
113
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 12046112 ip[4] | ip[5] | ip[6] | ip[7]) {
114 3954126 A = M(xC1S7, ip[1]) + M(xC7S1, ip[7]);
115 3954126 B = M(xC7S1, ip[1]) - M(xC1S7, ip[7]);
116 3954126 C = M(xC3S5, ip[3]) + M(xC5S3, ip[5]);
117 3954126 D = M(xC3S5, ip[5]) - M(xC5S3, ip[3]);
118
119 3954126 Ad = M(xC4S4, (A - C));
120 3954126 Bd = M(xC4S4, (B - D));
121
122 3954126 Cd = A + C;
123 3954126 Dd = B + D;
124
125 3954126 E = M(xC4S4, (ip[0] + ip[4])) + 8;
126 3954126 F = M(xC4S4, (ip[0] - ip[4])) + 8;
127
128
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 3954126 if (type == 1) { // HACK
129 742472 E += 16 * 128;
130 742472 F += 16 * 128;
131 }
132
133 3954126 G = M(xC2S6, ip[2]) + M(xC6S2, ip[6]);
134 3954126 H = M(xC6S2, ip[2]) - M(xC2S6, ip[6]);
135
136 3954126 Ed = E - G;
137 3954126 Gd = E + G;
138
139 3954126 Add = F + Ad;
140 3954126 Bdd = Bd - H;
141
142 3954126 Fd = F - Ad;
143 3954126 Hd = Bd + H;
144
145 /* Final sequence of operations over-write original inputs. */
146
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 3954126 if (type == 1) {
147 742472 dst[0 * stride] = av_clip_uint8((Gd + Cd) >> 4);
148 742472 dst[7 * stride] = av_clip_uint8((Gd - Cd) >> 4);
149
150 742472 dst[1 * stride] = av_clip_uint8((Add + Hd) >> 4);
151 742472 dst[2 * stride] = av_clip_uint8((Add - Hd) >> 4);
152
153 742472 dst[3 * stride] = av_clip_uint8((Ed + Dd) >> 4);
154 742472 dst[4 * stride] = av_clip_uint8((Ed - Dd) >> 4);
155
156 742472 dst[5 * stride] = av_clip_uint8((Fd + Bdd) >> 4);
157 742472 dst[6 * stride] = av_clip_uint8((Fd - Bdd) >> 4);
158 } else {
159 3211654 dst[0 * stride] = av_clip_uint8(dst[0 * stride] + ((Gd + Cd) >> 4));
160 3211654 dst[7 * stride] = av_clip_uint8(dst[7 * stride] + ((Gd - Cd) >> 4));
161
162 3211654 dst[1 * stride] = av_clip_uint8(dst[1 * stride] + ((Add + Hd) >> 4));
163 3211654 dst[2 * stride] = av_clip_uint8(dst[2 * stride] + ((Add - Hd) >> 4));
164
165 3211654 dst[3 * stride] = av_clip_uint8(dst[3 * stride] + ((Ed + Dd) >> 4));
166 3211654 dst[4 * stride] = av_clip_uint8(dst[4 * stride] + ((Ed - Dd) >> 4));
167
168 3211654 dst[5 * stride] = av_clip_uint8(dst[5 * stride] + ((Fd + Bdd) >> 4));
169 3211654 dst[6 * stride] = av_clip_uint8(dst[6 * stride] + ((Fd - Bdd) >> 4));
170 }
171 } else {
172
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 8091986 if (type == 1) {
173 2034960 dst[0*stride] =
174 2034960 dst[1*stride] =
175 2034960 dst[2*stride] =
176 2034960 dst[3*stride] =
177 2034960 dst[4*stride] =
178 2034960 dst[5*stride] =
179 2034960 dst[6*stride] =
180 2034960 dst[7*stride] = av_clip_uint8(128 + ((xC4S4 * ip[0] + (IdctAdjustBeforeShift << 16)) >> 20));
181 } else {
182
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 6057026 if (ip[0]) {
183 1484827 int v = (xC4S4 * ip[0] + (IdctAdjustBeforeShift << 16)) >> 20;
184 1484827 dst[0 * stride] = av_clip_uint8(dst[0 * stride] + v);
185 1484827 dst[1 * stride] = av_clip_uint8(dst[1 * stride] + v);
186 1484827 dst[2 * stride] = av_clip_uint8(dst[2 * stride] + v);
187 1484827 dst[3 * stride] = av_clip_uint8(dst[3 * stride] + v);
188 1484827 dst[4 * stride] = av_clip_uint8(dst[4 * stride] + v);
189 1484827 dst[5 * stride] = av_clip_uint8(dst[5 * stride] + v);
190 1484827 dst[6 * stride] = av_clip_uint8(dst[6 * stride] + v);
191 1484827 dst[7 * stride] = av_clip_uint8(dst[7 * stride] + v);
192 }
193 }
194 }
195
196 12046112 ip += 8; /* next column */
197 12046112 dst++;
198 }
199 1505764 }
200
201 405935 static av_always_inline void idct10(uint8_t *dst, ptrdiff_t stride,
202 int16_t *input, int type)
203 {
204 405935 int16_t *ip = input;
205
206 int A, B, C, D, Ad, Bd, Cd, Dd, E, F, G, H;
207 int Ed, Gd, Add, Bdd, Fd, Hd;
208
209 int i;
210
211 /* Inverse DCT on the rows now */
212
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 2029675 for (i = 0; i < 4; i++) {
213 /* Check for non-zero values */
214
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 1623740 if (ip[0 * 8] | ip[1 * 8] | ip[2 * 8] | ip[3 * 8]) {
215 111729 A = M(xC1S7, ip[1 * 8]);
216 111729 B = M(xC7S1, ip[1 * 8]);
217 111729 C = M(xC3S5, ip[3 * 8]);
218 111729 D = -M(xC5S3, ip[3 * 8]);
219
220 111729 Ad = M(xC4S4, (A - C));
221 111729 Bd = M(xC4S4, (B - D));
222
223 111729 Cd = A + C;
224 111729 Dd = B + D;
225
226 111729 E = M(xC4S4, ip[0 * 8]);
227 111729 F = E;
228
229 111729 G = M(xC2S6, ip[2 * 8]);
230 111729 H = M(xC6S2, ip[2 * 8]);
231
232 111729 Ed = E - G;
233 111729 Gd = E + G;
234
235 111729 Add = F + Ad;
236 111729 Bdd = Bd - H;
237
238 111729 Fd = F - Ad;
239 111729 Hd = Bd + H;
240
241 /* Final sequence of operations over-write original inputs */
242 111729 ip[0 * 8] = Gd + Cd;
243 111729 ip[7 * 8] = Gd - Cd;
244
245 111729 ip[1 * 8] = Add + Hd;
246 111729 ip[2 * 8] = Add - Hd;
247
248 111729 ip[3 * 8] = Ed + Dd;
249 111729 ip[4 * 8] = Ed - Dd;
250
251 111729 ip[5 * 8] = Fd + Bdd;
252 111729 ip[6 * 8] = Fd - Bdd;
253
254 }
255
256 1623740 ip += 1;
257 }
258
259 405935 ip = input;
260
261
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 3653415 for (i = 0; i < 8; i++) {
262 /* Check for non-zero values (bitwise or faster than ||) */
263
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 3247480 if (ip[0] | ip[1] | ip[2] | ip[3]) {
264 703548 A = M(xC1S7, ip[1]);
265 703548 B = M(xC7S1, ip[1]);
266 703548 C = M(xC3S5, ip[3]);
267 703548 D = -M(xC5S3, ip[3]);
268
269 703548 Ad = M(xC4S4, (A - C));
270 703548 Bd = M(xC4S4, (B - D));
271
272 703548 Cd = A + C;
273 703548 Dd = B + D;
274
275 703548 E = M(xC4S4, ip[0]);
276
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 703548 if (type == 1)
277 227418 E += 16 * 128;
278 703548 F = E;
279
280 703548 G = M(xC2S6, ip[2]);
281 703548 H = M(xC6S2, ip[2]);
282
283 703548 Ed = E - G;
284 703548 Gd = E + G;
285
286 703548 Add = F + Ad;
287 703548 Bdd = Bd - H;
288
289 703548 Fd = F - Ad;
290 703548 Hd = Bd + H;
291
292 703548 Gd += 8;
293 703548 Add += 8;
294 703548 Ed += 8;
295 703548 Fd += 8;
296
297 /* Final sequence of operations over-write original inputs. */
298
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 703548 if (type == 1) {
299 227418 dst[0 * stride] = av_clip_uint8((Gd + Cd) >> 4);
300 227418 dst[7 * stride] = av_clip_uint8((Gd - Cd) >> 4);
301
302 227418 dst[1 * stride] = av_clip_uint8((Add + Hd) >> 4);
303 227418 dst[2 * stride] = av_clip_uint8((Add - Hd) >> 4);
304
305 227418 dst[3 * stride] = av_clip_uint8((Ed + Dd) >> 4);
306 227418 dst[4 * stride] = av_clip_uint8((Ed - Dd) >> 4);
307
308 227418 dst[5 * stride] = av_clip_uint8((Fd + Bdd) >> 4);
309 227418 dst[6 * stride] = av_clip_uint8((Fd - Bdd) >> 4);
310 } else {
311 476130 dst[0 * stride] = av_clip_uint8(dst[0 * stride] + ((Gd + Cd) >> 4));
312 476130 dst[7 * stride] = av_clip_uint8(dst[7 * stride] + ((Gd - Cd) >> 4));
313
314 476130 dst[1 * stride] = av_clip_uint8(dst[1 * stride] + ((Add + Hd) >> 4));
315 476130 dst[2 * stride] = av_clip_uint8(dst[2 * stride] + ((Add - Hd) >> 4));
316
317 476130 dst[3 * stride] = av_clip_uint8(dst[3 * stride] + ((Ed + Dd) >> 4));
318 476130 dst[4 * stride] = av_clip_uint8(dst[4 * stride] + ((Ed - Dd) >> 4));
319
320 476130 dst[5 * stride] = av_clip_uint8(dst[5 * stride] + ((Fd + Bdd) >> 4));
321 476130 dst[6 * stride] = av_clip_uint8(dst[6 * stride] + ((Fd - Bdd) >> 4));
322 }
323 } else {
324
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 2543932 if (type == 1) {
325 52526 dst[0*stride] =
326 52526 dst[1*stride] =
327 52526 dst[2*stride] =
328 52526 dst[3*stride] =
329 52526 dst[4*stride] =
330 52526 dst[5*stride] =
331 52526 dst[6*stride] =
332 52526 dst[7*stride] = 128;
333 }
334 }
335
336 3247480 ip += 8;
337 3247480 dst++;
338 }
339 405935 }
340
341 34993 void ff_vp3dsp_idct10_put(uint8_t *dest, ptrdiff_t stride, int16_t *block)
342 {
343 34993 idct10(dest, stride, block, 1);
344 34993 memset(block, 0, sizeof(*block) * 64);
345 34993 }
346
347 370942 void ff_vp3dsp_idct10_add(uint8_t *dest, ptrdiff_t stride, int16_t *block)
348 {
349 370942 idct10(dest, stride, block, 2);
350 370942 memset(block, 0, sizeof(*block) * 64);
351 370942 }
352
353 347179 static void vp3_idct_put_c(uint8_t *dest /* align 8 */, ptrdiff_t stride,
354 int16_t *block /* align 16 */)
355 {
356 347179 idct(dest, stride, block, 1);
357 347179 memset(block, 0, sizeof(*block) * 64);
358 347179 }
359
360 1158585 static void vp3_idct_add_c(uint8_t *dest /* align 8 */, ptrdiff_t stride,
361 int16_t *block /* align 16 */)
362 {
363 1158585 idct(dest, stride, block, 2);
364 1158585 memset(block, 0, sizeof(*block) * 64);
365 1158585 }
366
367 127567 static void vp3_idct_dc_add_c(uint8_t *dest /* align 8 */, ptrdiff_t stride,
368 int16_t *block /* align 16 */)
369 {
370 127567 int i, dc = (block[0] + 15) >> 5;
371
372
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 1148103 for (i = 0; i < 8; i++) {
373 1020536 dest[0] = av_clip_uint8(dest[0] + dc);
374 1020536 dest[1] = av_clip_uint8(dest[1] + dc);
375 1020536 dest[2] = av_clip_uint8(dest[2] + dc);
376 1020536 dest[3] = av_clip_uint8(dest[3] + dc);
377 1020536 dest[4] = av_clip_uint8(dest[4] + dc);
378 1020536 dest[5] = av_clip_uint8(dest[5] + dc);
379 1020536 dest[6] = av_clip_uint8(dest[6] + dc);
380 1020536 dest[7] = av_clip_uint8(dest[7] + dc);
381 1020536 dest += stride;
382 }
383 127567 block[0] = 0;
384 127567 }
385
386 465946 static av_always_inline void vp3_v_loop_filter_c(uint8_t *first_pixel, ptrdiff_t stride,
387 int *bounding_values, int count)
388 {
389 unsigned char *end;
390 int filter_value;
391 465946 const ptrdiff_t nstride = -stride;
392
393
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 4514770 for (end = first_pixel + count; first_pixel < end; first_pixel++) {
394 4048824 filter_value = (first_pixel[2 * nstride] - first_pixel[stride]) +
395 4048824 (first_pixel[0] - first_pixel[nstride]) * 3;
396 4048824 filter_value = bounding_values[(filter_value + 4) >> 3];
397
398 4048824 first_pixel[nstride] = av_clip_uint8(first_pixel[nstride] + filter_value);
399 4048824 first_pixel[0] = av_clip_uint8(first_pixel[0] - filter_value);
400 }
401 465946 }
402
403 492814 static av_always_inline void vp3_h_loop_filter_c(uint8_t *first_pixel, ptrdiff_t stride,
404 int *bounding_values, int count)
405 {
406 unsigned char *end;
407 int filter_value;
408
409
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 4800398 for (end = first_pixel + count * stride; first_pixel != end; first_pixel += stride) {
410 4307584 filter_value = (first_pixel[-2] - first_pixel[1]) +
411 4307584 (first_pixel[ 0] - first_pixel[-1]) * 3;
412 4307584 filter_value = bounding_values[(filter_value + 4) >> 3];
413
414 4307584 first_pixel[-1] = av_clip_uint8(first_pixel[-1] + filter_value);
415 4307584 first_pixel[ 0] = av_clip_uint8(first_pixel[ 0] - filter_value);
416 }
417 492814 }
418
419 #define LOOP_FILTER(prefix, suffix, dim, count) \
420 void prefix##_##dim##_loop_filter_##count##suffix(uint8_t *first_pixel, ptrdiff_t stride, \
421 int *bounding_values) \
422 { \
423 vp3_##dim##_loop_filter_c(first_pixel, stride, bounding_values, count); \
424 }
425
426 385632 static LOOP_FILTER(vp3,_c, v, 8)
427 401546 static LOOP_FILTER(vp3,_c, h, 8)
428 80314 LOOP_FILTER(ff_vp3dsp, , v, 12)
429 91268 LOOP_FILTER(ff_vp3dsp, , h, 12)
430
431 333697 static void put_no_rnd_pixels_l2(uint8_t *dst, const uint8_t *src1,
432 const uint8_t *src2, ptrdiff_t stride, int h)
433 {
434 int i;
435
436
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 3003273 for (i = 0; i < h; i++) {
437 uint32_t a, b;
438
439 2669576 a = AV_RN32(&src1[i * stride]);
440 2669576 b = AV_RN32(&src2[i * stride]);
441 2669576 AV_WN32A(&dst[i * stride], no_rnd_avg32(a, b));
442 2669576 a = AV_RN32(&src1[i * stride + 4]);
443 2669576 b = AV_RN32(&src2[i * stride + 4]);
444 2669576 AV_WN32A(&dst[i * stride + 4], no_rnd_avg32(a, b));
445 }
446 333697 }
447
448 73 av_cold void ff_vp3dsp_init(VP3DSPContext *c)
449 {
450 73 c->put_no_rnd_pixels_l2 = put_no_rnd_pixels_l2;
451
452 73 c->idct_put = vp3_idct_put_c;
453 73 c->idct_add = vp3_idct_add_c;
454 73 c->idct_dc_add = vp3_idct_dc_add_c;
455 73 c->v_loop_filter = c->v_loop_filter_unaligned = vp3_v_loop_filter_8_c;
456 73 c->h_loop_filter = c->h_loop_filter_unaligned = vp3_h_loop_filter_8_c;
457
458 #if ARCH_ARM
459 ff_vp3dsp_init_arm(c);
460 #elif ARCH_PPC
461 ff_vp3dsp_init_ppc(c);
462 #elif ARCH_X86
463 73 ff_vp3dsp_init_x86(c);
464 #elif ARCH_MIPS
465 ff_vp3dsp_init_mips(c);
466 #endif
467 73 }
468
469 /*
470 * This function initializes the loop filter boundary limits if the frame's
471 * quality index is different from the previous frame's.
472 *
473 * where sizeof(bounding_values_array) is 256 * sizeof(int)
474 *
475 * The filter_limit_values may not be larger than 127.
476 */
477 485 void ff_vp3dsp_set_bounding_values(int * bounding_values_array, int filter_limit)
478 {
479 485 int *bounding_values = bounding_values_array + 127;
480 int x;
481 int value;
482
483
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 485 av_assert0(filter_limit < 128U);
484
485 /* set up the bounding values */
486 485 memset(bounding_values_array, 0, 256 * sizeof(int));
487
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 3938 for (x = 0; x < filter_limit; x++) {
488 3453 bounding_values[-x] = -x;
489 3453 bounding_values[x] = x;
490 }
491
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 3534 for (x = value = filter_limit; x < 128 && value; x++, value--) {
492 3049 bounding_values[ x] = value;
493 3049 bounding_values[-x] = -value;
494 }
495
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 485 if (value)
496 5 bounding_values[128] = value;
497 #if ARCH_X86
498 485 bounding_values[129] = bounding_values[130] =
499 485 bounding_values[131] = bounding_values[132] = filter_limit * 0x00020002U;
500 #else
501 bounding_values[129] = bounding_values[130] = filter_limit * 0x02020202U;
502 #endif
503 485 }
504