media/libvpx/vp9/common/vp9_scan.c@b8a032363ba2
media/libvpx/vp9/common/vp9_scan.c
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
1 /*
2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
9 */
11 #include <assert.h>
13 #include "vp9/common/vp9_scan.h"
15 DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_4x4[16]) = {
16 0, 4, 1, 5,
17 8, 2, 12, 9,
18 3, 6, 13, 10,
19 7, 14, 11, 15,
20 };
22 DECLARE_ALIGNED(16, const int16_t, vp9_col_scan_4x4[16]) = {
23 0, 4, 8, 1,
24 12, 5, 9, 2,
25 13, 6, 10, 3,
26 7, 14, 11, 15,
27 };
29 DECLARE_ALIGNED(16, const int16_t, vp9_row_scan_4x4[16]) = {
30 0, 1, 4, 2,
31 5, 3, 6, 8,
32 9, 7, 12, 10,
33 13, 11, 14, 15,
34 };
36 DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_8x8[64]) = {
37 0, 8, 1, 16, 9, 2, 17, 24,
38 10, 3, 18, 25, 32, 11, 4, 26,
39 33, 19, 40, 12, 34, 27, 5, 41,
40 20, 48, 13, 35, 42, 28, 21, 6,
41 49, 56, 36, 43, 29, 7, 14, 50,
42 57, 44, 22, 37, 15, 51, 58, 30,
43 45, 23, 52, 59, 38, 31, 60, 53,
44 46, 39, 61, 54, 47, 62, 55, 63,
45 };
47 DECLARE_ALIGNED(16, const int16_t, vp9_col_scan_8x8[64]) = {
48 0, 8, 16, 1, 24, 9, 32, 17,
49 2, 40, 25, 10, 33, 18, 48, 3,
50 26, 41, 11, 56, 19, 34, 4, 49,
51 27, 42, 12, 35, 20, 57, 50, 28,
52 5, 43, 13, 36, 58, 51, 21, 44,
53 6, 29, 59, 37, 14, 52, 22, 7,
54 45, 60, 30, 15, 38, 53, 23, 46,
55 31, 61, 39, 54, 47, 62, 55, 63,
56 };
58 DECLARE_ALIGNED(16, const int16_t, vp9_row_scan_8x8[64]) = {
59 0, 1, 2, 8, 9, 3, 16, 10,
60 4, 17, 11, 24, 5, 18, 25, 12,
61 19, 26, 32, 6, 13, 20, 33, 27,
62 7, 34, 40, 21, 28, 41, 14, 35,
63 48, 42, 29, 36, 49, 22, 43, 15,
64 56, 37, 50, 44, 30, 57, 23, 51,
65 58, 45, 38, 52, 31, 59, 53, 46,
66 60, 39, 61, 47, 54, 55, 62, 63,
67 };
69 DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_16x16[256]) = {
70 0, 16, 1, 32, 17, 2, 48, 33, 18, 3, 64, 34, 49, 19, 65, 80,
71 50, 4, 35, 66, 20, 81, 96, 51, 5, 36, 82, 97, 67, 112, 21, 52,
72 98, 37, 83, 113, 6, 68, 128, 53, 22, 99, 114, 84, 7, 129, 38, 69,
73 100, 115, 144, 130, 85, 54, 23, 8, 145, 39, 70, 116, 101, 131, 160, 146,
74 55, 86, 24, 71, 132, 117, 161, 40, 9, 102, 147, 176, 162, 87, 56, 25,
75 133, 118, 177, 148, 72, 103, 41, 163, 10, 192, 178, 88, 57, 134, 149, 119,
76 26, 164, 73, 104, 193, 42, 179, 208, 11, 135, 89, 165, 120, 150, 58, 194,
77 180, 27, 74, 209, 105, 151, 136, 43, 90, 224, 166, 195, 181, 121, 210, 59,
78 12, 152, 106, 167, 196, 75, 137, 225, 211, 240, 182, 122, 91, 28, 197, 13,
79 226, 168, 183, 153, 44, 212, 138, 107, 241, 60, 29, 123, 198, 184, 227, 169,
80 242, 76, 213, 154, 45, 92, 14, 199, 139, 61, 228, 214, 170, 185, 243, 108,
81 77, 155, 30, 15, 200, 229, 124, 215, 244, 93, 46, 186, 171, 201, 109, 140,
82 230, 62, 216, 245, 31, 125, 78, 156, 231, 47, 187, 202, 217, 94, 246, 141,
83 63, 232, 172, 110, 247, 157, 79, 218, 203, 126, 233, 188, 248, 95, 173, 142,
84 219, 111, 249, 234, 158, 127, 189, 204, 250, 235, 143, 174, 220, 205, 159,
85 251,
86 190, 221, 175, 236, 237, 191, 206, 252, 222, 253, 207, 238, 223, 254, 239,
87 255,
88 };
90 DECLARE_ALIGNED(16, const int16_t, vp9_col_scan_16x16[256]) = {
91 0, 16, 32, 48, 1, 64, 17, 80, 33, 96, 49, 2, 65, 112, 18, 81,
92 34, 128, 50, 97, 3, 66, 144, 19, 113, 35, 82, 160, 98, 51, 129, 4,
93 67, 176, 20, 114, 145, 83, 36, 99, 130, 52, 192, 5, 161, 68, 115, 21,
94 146, 84, 208, 177, 37, 131, 100, 53, 162, 224, 69, 6, 116, 193, 147, 85,
95 22, 240, 132, 38, 178, 101, 163, 54, 209, 117, 70, 7, 148, 194, 86, 179,
96 225, 23, 133, 39, 164, 8, 102, 210, 241, 55, 195, 118, 149, 71, 180, 24,
97 87, 226, 134, 165, 211, 40, 103, 56, 72, 150, 196, 242, 119, 9, 181, 227,
98 88, 166, 25, 135, 41, 104, 212, 57, 151, 197, 120, 73, 243, 182, 136, 167,
99 213, 89, 10, 228, 105, 152, 198, 26, 42, 121, 183, 244, 168, 58, 137, 229,
100 74, 214, 90, 153, 199, 184, 11, 106, 245, 27, 122, 230, 169, 43, 215, 59,
101 200, 138, 185, 246, 75, 12, 91, 154, 216, 231, 107, 28, 44, 201, 123, 170,
102 60, 247, 232, 76, 139, 13, 92, 217, 186, 248, 155, 108, 29, 124, 45, 202,
103 233, 171, 61, 14, 77, 140, 15, 249, 93, 30, 187, 156, 218, 46, 109, 125,
104 62, 172, 78, 203, 31, 141, 234, 94, 47, 188, 63, 157, 110, 250, 219, 79,
105 126, 204, 173, 142, 95, 189, 111, 235, 158, 220, 251, 127, 174, 143, 205,
106 236,
107 159, 190, 221, 252, 175, 206, 237, 191, 253, 222, 238, 207, 254, 223, 239,
108 255,
109 };
111 DECLARE_ALIGNED(16, const int16_t, vp9_row_scan_16x16[256]) = {
112 0, 1, 2, 16, 3, 17, 4, 18, 32, 5, 33, 19, 6, 34, 48, 20,
113 49, 7, 35, 21, 50, 64, 8, 36, 65, 22, 51, 37, 80, 9, 66, 52,
114 23, 38, 81, 67, 10, 53, 24, 82, 68, 96, 39, 11, 54, 83, 97, 69,
115 25, 98, 84, 40, 112, 55, 12, 70, 99, 113, 85, 26, 41, 56, 114, 100,
116 13, 71, 128, 86, 27, 115, 101, 129, 42, 57, 72, 116, 14, 87, 130, 102,
117 144, 73, 131, 117, 28, 58, 15, 88, 43, 145, 103, 132, 146, 118, 74, 160,
118 89, 133, 104, 29, 59, 147, 119, 44, 161, 148, 90, 105, 134, 162, 120, 176,
119 75, 135, 149, 30, 60, 163, 177, 45, 121, 91, 106, 164, 178, 150, 192, 136,
120 165, 179, 31, 151, 193, 76, 122, 61, 137, 194, 107, 152, 180, 208, 46, 166,
121 167, 195, 92, 181, 138, 209, 123, 153, 224, 196, 77, 168, 210, 182, 240, 108,
122 197, 62, 154, 225, 183, 169, 211, 47, 139, 93, 184, 226, 212, 241, 198, 170,
123 124, 155, 199, 78, 213, 185, 109, 227, 200, 63, 228, 242, 140, 214, 171, 186,
124 156, 229, 243, 125, 94, 201, 244, 215, 216, 230, 141, 187, 202, 79, 172, 110,
125 157, 245, 217, 231, 95, 246, 232, 126, 203, 247, 233, 173, 218, 142, 111,
126 158,
127 188, 248, 127, 234, 219, 249, 189, 204, 143, 174, 159, 250, 235, 205, 220,
128 175,
129 190, 251, 221, 191, 206, 236, 207, 237, 252, 222, 253, 223, 238, 239, 254,
130 255,
131 };
133 DECLARE_ALIGNED(16, const int16_t, vp9_default_scan_32x32[1024]) = {
134 0, 32, 1, 64, 33, 2, 96, 65, 34, 128, 3, 97, 66, 160,
135 129, 35, 98, 4, 67, 130, 161, 192, 36, 99, 224, 5, 162, 193,
136 68, 131, 37, 100,
137 225, 194, 256, 163, 69, 132, 6, 226, 257, 288, 195, 101, 164, 38,
138 258, 7, 227, 289, 133, 320, 70, 196, 165, 290, 259, 228, 39, 321,
139 102, 352, 8, 197,
140 71, 134, 322, 291, 260, 353, 384, 229, 166, 103, 40, 354, 323, 292,
141 135, 385, 198, 261, 72, 9, 416, 167, 386, 355, 230, 324, 104, 293,
142 41, 417, 199, 136,
143 262, 387, 448, 325, 356, 10, 73, 418, 231, 168, 449, 294, 388, 105,
144 419, 263, 42, 200, 357, 450, 137, 480, 74, 326, 232, 11, 389, 169,
145 295, 420, 106, 451,
146 481, 358, 264, 327, 201, 43, 138, 512, 482, 390, 296, 233, 170, 421,
147 75, 452, 359, 12, 513, 265, 483, 328, 107, 202, 514, 544, 422, 391,
148 453, 139, 44, 234,
149 484, 297, 360, 171, 76, 515, 545, 266, 329, 454, 13, 423, 203, 108,
150 546, 485, 576, 298, 235, 140, 361, 330, 172, 547, 45, 455, 267, 577,
151 486, 77, 204, 362,
152 608, 14, 299, 578, 109, 236, 487, 609, 331, 141, 579, 46, 15, 173,
153 610, 363, 78, 205, 16, 110, 237, 611, 142, 47, 174, 79, 206, 17,
154 111, 238, 48, 143,
155 80, 175, 112, 207, 49, 18, 239, 81, 113, 19, 50, 82, 114, 51,
156 83, 115, 640, 516, 392, 268, 144, 20, 672, 641, 548, 517, 424,
157 393, 300, 269, 176, 145,
158 52, 21, 704, 673, 642, 580, 549, 518, 456, 425, 394, 332, 301,
159 270, 208, 177, 146, 84, 53, 22, 736, 705, 674, 643, 612, 581,
160 550, 519, 488, 457, 426, 395,
161 364, 333, 302, 271, 240, 209, 178, 147, 116, 85, 54, 23, 737,
162 706, 675, 613, 582, 551, 489, 458, 427, 365, 334, 303, 241,
163 210, 179, 117, 86, 55, 738, 707,
164 614, 583, 490, 459, 366, 335, 242, 211, 118, 87, 739, 615, 491,
165 367, 243, 119, 768, 644, 520, 396, 272, 148, 24, 800, 769, 676,
166 645, 552, 521, 428, 397, 304,
167 273, 180, 149, 56, 25, 832, 801, 770, 708, 677, 646, 584, 553,
168 522, 460, 429, 398, 336, 305, 274, 212, 181, 150, 88, 57, 26,
169 864, 833, 802, 771, 740, 709,
170 678, 647, 616, 585, 554, 523, 492, 461, 430, 399, 368, 337, 306,
171 275, 244, 213, 182, 151, 120, 89, 58, 27, 865, 834, 803, 741,
172 710, 679, 617, 586, 555, 493,
173 462, 431, 369, 338, 307, 245, 214, 183, 121, 90, 59, 866, 835,
174 742, 711, 618, 587, 494, 463, 370, 339, 246, 215, 122, 91, 867,
175 743, 619, 495, 371, 247, 123,
176 896, 772, 648, 524, 400, 276, 152, 28, 928, 897, 804, 773, 680,
177 649, 556, 525, 432, 401, 308, 277, 184, 153, 60, 29, 960, 929,
178 898, 836, 805, 774, 712, 681,
179 650, 588, 557, 526, 464, 433, 402, 340, 309, 278, 216, 185, 154,
180 92, 61, 30, 992, 961, 930, 899, 868, 837, 806, 775, 744, 713, 682,
181 651, 620, 589, 558, 527,
182 496, 465, 434, 403, 372, 341, 310, 279, 248, 217, 186, 155, 124,
183 93, 62, 31, 993, 962, 931, 869, 838, 807, 745, 714, 683, 621, 590,
184 559, 497, 466, 435, 373,
185 342, 311, 249, 218, 187, 125, 94, 63, 994, 963, 870, 839, 746, 715,
186 622, 591, 498, 467, 374, 343, 250, 219, 126, 95, 995, 871, 747, 623,
187 499, 375, 251, 127,
188 900, 776, 652, 528, 404, 280, 156, 932, 901, 808, 777, 684, 653, 560,
189 529, 436, 405, 312, 281, 188, 157, 964, 933, 902, 840, 809, 778, 716,
190 685, 654, 592, 561,
191 530, 468, 437, 406, 344, 313, 282, 220, 189, 158, 996, 965, 934, 903,
192 872, 841, 810, 779, 748, 717, 686, 655, 624, 593, 562, 531, 500, 469,
193 438, 407, 376, 345,
194 314, 283, 252, 221, 190, 159, 997, 966, 935, 873, 842, 811, 749, 718,
195 687, 625, 594, 563, 501, 470, 439, 377, 346, 315, 253, 222, 191, 998,
196 967, 874, 843, 750,
197 719, 626, 595, 502, 471, 378, 347, 254, 223, 999, 875, 751, 627, 503,
198 379, 255, 904, 780, 656, 532, 408, 284, 936, 905, 812, 781, 688, 657,
199 564, 533, 440, 409,
200 316, 285, 968, 937, 906, 844, 813, 782, 720, 689, 658, 596, 565, 534,
201 472, 441, 410, 348, 317, 286, 1000, 969, 938, 907, 876, 845, 814, 783,
202 752, 721, 690, 659,
203 628, 597, 566, 535, 504, 473, 442, 411, 380, 349, 318, 287, 1001, 970,
204 939, 877, 846, 815, 753, 722, 691, 629, 598, 567, 505, 474, 443, 381,
205 350, 319, 1002, 971,
206 878, 847, 754, 723, 630, 599, 506, 475, 382, 351, 1003, 879, 755, 631,
207 507, 383, 908, 784, 660, 536, 412, 940, 909, 816, 785, 692, 661, 568,
208 537, 444, 413, 972,
209 941, 910, 848, 817, 786, 724, 693, 662, 600, 569, 538, 476, 445, 414,
210 1004, 973, 942, 911, 880, 849, 818, 787, 756, 725, 694, 663, 632, 601,
211 570, 539, 508, 477,
212 446, 415, 1005, 974, 943, 881, 850, 819, 757, 726, 695, 633, 602, 571,
213 509, 478, 447, 1006, 975, 882, 851, 758, 727, 634, 603, 510, 479,
214 1007, 883, 759, 635, 511,
215 912, 788, 664, 540, 944, 913, 820, 789, 696, 665, 572, 541, 976, 945,
216 914, 852, 821, 790, 728, 697, 666, 604, 573, 542, 1008, 977, 946, 915,
217 884, 853, 822, 791,
218 760, 729, 698, 667, 636, 605, 574, 543, 1009, 978, 947, 885, 854, 823,
219 761, 730, 699, 637, 606, 575, 1010, 979, 886, 855, 762, 731, 638, 607,
220 1011, 887, 763, 639,
221 916, 792, 668, 948, 917, 824, 793, 700, 669, 980, 949, 918, 856, 825,
222 794, 732, 701, 670, 1012, 981, 950, 919, 888, 857, 826, 795, 764, 733,
223 702, 671, 1013, 982,
224 951, 889, 858, 827, 765, 734, 703, 1014, 983, 890, 859, 766, 735, 1015,
225 891, 767, 920, 796, 952, 921, 828, 797, 984, 953, 922, 860, 829, 798,
226 1016, 985, 954, 923,
227 892, 861, 830, 799, 1017, 986, 955, 893, 862, 831, 1018, 987, 894, 863,
228 1019, 895, 924, 956, 925, 988, 957, 926, 1020, 989, 958, 927, 1021,
229 990, 959, 1022, 991, 1023,
230 };
232 // Neighborhood 5-tuples for various scans and blocksizes,
233 // in {top, left, topleft, topright, bottomleft} order
234 // for each position in raster scan order.
235 // -1 indicates the neighbor does not exist.
236 DECLARE_ALIGNED(16, int16_t,
237 vp9_default_scan_4x4_neighbors[17 * MAX_NEIGHBORS]);
238 DECLARE_ALIGNED(16, int16_t,
239 vp9_col_scan_4x4_neighbors[17 * MAX_NEIGHBORS]);
240 DECLARE_ALIGNED(16, int16_t,
241 vp9_row_scan_4x4_neighbors[17 * MAX_NEIGHBORS]);
242 DECLARE_ALIGNED(16, int16_t,
243 vp9_col_scan_8x8_neighbors[65 * MAX_NEIGHBORS]);
244 DECLARE_ALIGNED(16, int16_t,
245 vp9_row_scan_8x8_neighbors[65 * MAX_NEIGHBORS]);
246 DECLARE_ALIGNED(16, int16_t,
247 vp9_default_scan_8x8_neighbors[65 * MAX_NEIGHBORS]);
248 DECLARE_ALIGNED(16, int16_t,
249 vp9_col_scan_16x16_neighbors[257 * MAX_NEIGHBORS]);
250 DECLARE_ALIGNED(16, int16_t,
251 vp9_row_scan_16x16_neighbors[257 * MAX_NEIGHBORS]);
252 DECLARE_ALIGNED(16, int16_t,
253 vp9_default_scan_16x16_neighbors[257 * MAX_NEIGHBORS]);
254 DECLARE_ALIGNED(16, int16_t,
255 vp9_default_scan_32x32_neighbors[1025 * MAX_NEIGHBORS]);
258 DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_4x4[16]);
259 DECLARE_ALIGNED(16, int16_t, vp9_col_iscan_4x4[16]);
260 DECLARE_ALIGNED(16, int16_t, vp9_row_iscan_4x4[16]);
261 DECLARE_ALIGNED(16, int16_t, vp9_col_iscan_8x8[64]);
262 DECLARE_ALIGNED(16, int16_t, vp9_row_iscan_8x8[64]);
263 DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_8x8[64]);
264 DECLARE_ALIGNED(16, int16_t, vp9_col_iscan_16x16[256]);
265 DECLARE_ALIGNED(16, int16_t, vp9_row_iscan_16x16[256]);
266 DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_16x16[256]);
267 DECLARE_ALIGNED(16, int16_t, vp9_default_iscan_32x32[1024]);
269 static int find_in_scan(const int16_t *scan, int l, int idx) {
270 int n, l2 = l * l;
271 for (n = 0; n < l2; n++) {
272 int rc = scan[n];
273 if (rc == idx)
274 return n;
275 }
276 assert(0);
277 return -1;
278 }
279 static void init_scan_neighbors(const int16_t *scan,
280 int16_t *iscan,
281 int l, int16_t *neighbors) {
282 int l2 = l * l;
283 int n, i, j;
285 // dc doesn't use this type of prediction
286 neighbors[MAX_NEIGHBORS * 0 + 0] = 0;
287 neighbors[MAX_NEIGHBORS * 0 + 1] = 0;
288 iscan[0] = find_in_scan(scan, l, 0);
289 for (n = 1; n < l2; n++) {
290 int rc = scan[n];
291 iscan[n] = find_in_scan(scan, l, n);
292 i = rc / l;
293 j = rc % l;
294 if (i > 0 && j > 0) {
295 // col/row scan is used for adst/dct, and generally means that
296 // energy decreases to zero much faster in the dimension in
297 // which ADST is used compared to the direction in which DCT
298 // is used. Likewise, we find much higher correlation between
299 // coefficients within the direction in which DCT is used.
300 // Therefore, if we use ADST/DCT, prefer the DCT neighbor coeff
301 // as a context. If ADST or DCT is used in both directions, we
302 // use the combination of the two as a context.
303 int a = (i - 1) * l + j;
304 int b = i * l + j - 1;
305 if (scan == vp9_col_scan_4x4 || scan == vp9_col_scan_8x8 ||
306 scan == vp9_col_scan_16x16) {
307 // in the col/row scan cases (as well as left/top edge cases), we set
308 // both contexts to the same value, so we can branchlessly do a+b+1>>1
309 // which automatically becomes a if a == b
310 neighbors[MAX_NEIGHBORS * n + 0] =
311 neighbors[MAX_NEIGHBORS * n + 1] = a;
312 } else if (scan == vp9_row_scan_4x4 || scan == vp9_row_scan_8x8 ||
313 scan == vp9_row_scan_16x16) {
314 neighbors[MAX_NEIGHBORS * n + 0] =
315 neighbors[MAX_NEIGHBORS * n + 1] = b;
316 } else {
317 neighbors[MAX_NEIGHBORS * n + 0] = a;
318 neighbors[MAX_NEIGHBORS * n + 1] = b;
319 }
320 } else if (i > 0) {
321 neighbors[MAX_NEIGHBORS * n + 0] =
322 neighbors[MAX_NEIGHBORS * n + 1] = (i - 1) * l + j;
323 } else {
324 assert(j > 0);
325 neighbors[MAX_NEIGHBORS * n + 0] =
326 neighbors[MAX_NEIGHBORS * n + 1] = i * l + j - 1;
327 }
328 assert(iscan[neighbors[MAX_NEIGHBORS * n + 0]] < n);
329 }
330 // one padding item so we don't have to add branches in code to handle
331 // calls to get_coef_context() for the token after the final dc token
332 neighbors[MAX_NEIGHBORS * l2 + 0] = 0;
333 neighbors[MAX_NEIGHBORS * l2 + 1] = 0;
334 }
336 void vp9_init_neighbors() {
337 init_scan_neighbors(vp9_default_scan_4x4, vp9_default_iscan_4x4, 4,
338 vp9_default_scan_4x4_neighbors);
339 init_scan_neighbors(vp9_row_scan_4x4, vp9_row_iscan_4x4, 4,
340 vp9_row_scan_4x4_neighbors);
341 init_scan_neighbors(vp9_col_scan_4x4, vp9_col_iscan_4x4, 4,
342 vp9_col_scan_4x4_neighbors);
343 init_scan_neighbors(vp9_default_scan_8x8, vp9_default_iscan_8x8, 8,
344 vp9_default_scan_8x8_neighbors);
345 init_scan_neighbors(vp9_row_scan_8x8, vp9_row_iscan_8x8, 8,
346 vp9_row_scan_8x8_neighbors);
347 init_scan_neighbors(vp9_col_scan_8x8, vp9_col_iscan_8x8, 8,
348 vp9_col_scan_8x8_neighbors);
349 init_scan_neighbors(vp9_default_scan_16x16, vp9_default_iscan_16x16, 16,
350 vp9_default_scan_16x16_neighbors);
351 init_scan_neighbors(vp9_row_scan_16x16, vp9_row_iscan_16x16, 16,
352 vp9_row_scan_16x16_neighbors);
353 init_scan_neighbors(vp9_col_scan_16x16, vp9_col_iscan_16x16, 16,
354 vp9_col_scan_16x16_neighbors);
355 init_scan_neighbors(vp9_default_scan_32x32, vp9_default_iscan_32x32, 32,
356 vp9_default_scan_32x32_neighbors);
357 }
