1 /*
2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3 *
4 * This source code is subject to the terms of the BSD 2 Clause License and
5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
6 * was not distributed with this source code in the LICENSE file, you can
7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
8 * Media Patent License 1.0 was not distributed with this source code in the
9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10 */
11
12 /*!\file
13 * \brief Describes film grain parameters and film grain synthesis
14 *
15 */
16
17 #include <stdio.h>
18 #include <string.h>
19 #include <stdlib.h>
20 #include <assert.h>
21 #include "aom_dsp/grain_synthesis.h"
22 #include "aom_mem/aom_mem.h"
23
24 // Samples with Gaussian distribution in the range of [-2048, 2047] (12 bits)
25 // with zero mean and standard deviation of about 512.
26 // should be divided by 4 for 10-bit range and 16 for 8-bit range.
27 static const int gaussian_sequence[2048] = {
28 56, 568, -180, 172, 124, -84, 172, -64, -900, 24, 820,
29 224, 1248, 996, 272, -8, -916, -388, -732, -104, -188, 800,
30 112, -652, -320, -376, 140, -252, 492, -168, 44, -788, 588,
31 -584, 500, -228, 12, 680, 272, -476, 972, -100, 652, 368,
32 432, -196, -720, -192, 1000, -332, 652, -136, -552, -604, -4,
33 192, -220, -136, 1000, -52, 372, -96, -624, 124, -24, 396,
34 540, -12, -104, 640, 464, 244, -208, -84, 368, -528, -740,
35 248, -968, -848, 608, 376, -60, -292, -40, -156, 252, -292,
36 248, 224, -280, 400, -244, 244, -60, 76, -80, 212, 532,
37 340, 128, -36, 824, -352, -60, -264, -96, -612, 416, -704,
38 220, -204, 640, -160, 1220, -408, 900, 336, 20, -336, -96,
39 -792, 304, 48, -28, -1232, -1172, -448, 104, -292, -520, 244,
40 60, -948, 0, -708, 268, 108, 356, -548, 488, -344, -136,
41 488, -196, -224, 656, -236, -1128, 60, 4, 140, 276, -676,
42 -376, 168, -108, 464, 8, 564, 64, 240, 308, -300, -400,
43 -456, -136, 56, 120, -408, -116, 436, 504, -232, 328, 844,
44 -164, -84, 784, -168, 232, -224, 348, -376, 128, 568, 96,
45 -1244, -288, 276, 848, 832, -360, 656, 464, -384, -332, -356,
46 728, -388, 160, -192, 468, 296, 224, 140, -776, -100, 280,
47 4, 196, 44, -36, -648, 932, 16, 1428, 28, 528, 808,
48 772, 20, 268, 88, -332, -284, 124, -384, -448, 208, -228,
49 -1044, -328, 660, 380, -148, -300, 588, 240, 540, 28, 136,
50 -88, -436, 256, 296, -1000, 1400, 0, -48, 1056, -136, 264,
51 -528, -1108, 632, -484, -592, -344, 796, 124, -668, -768, 388,
52 1296, -232, -188, -200, -288, -4, 308, 100, -168, 256, -500,
53 204, -508, 648, -136, 372, -272, -120, -1004, -552, -548, -384,
54 548, -296, 428, -108, -8, -912, -324, -224, -88, -112, -220,
55 -100, 996, -796, 548, 360, -216, 180, 428, -200, -212, 148,
56 96, 148, 284, 216, -412, -320, 120, -300, -384, -604, -572,
57 -332, -8, -180, -176, 696, 116, -88, 628, 76, 44, -516,
58 240, -208, -40, 100, -592, 344, -308, -452, -228, 20, 916,
59 -1752, -136, -340, -804, 140, 40, 512, 340, 248, 184, -492,
60 896, -156, 932, -628, 328, -688, -448, -616, -752, -100, 560,
61 -1020, 180, -800, -64, 76, 576, 1068, 396, 660, 552, -108,
62 -28, 320, -628, 312, -92, -92, -472, 268, 16, 560, 516,
63 -672, -52, 492, -100, 260, 384, 284, 292, 304, -148, 88,
64 -152, 1012, 1064, -228, 164, -376, -684, 592, -392, 156, 196,
65 -524, -64, -884, 160, -176, 636, 648, 404, -396, -436, 864,
66 424, -728, 988, -604, 904, -592, 296, -224, 536, -176, -920,
67 436, -48, 1176, -884, 416, -776, -824, -884, 524, -548, -564,
68 -68, -164, -96, 692, 364, -692, -1012, -68, 260, -480, 876,
69 -1116, 452, -332, -352, 892, -1088, 1220, -676, 12, -292, 244,
70 496, 372, -32, 280, 200, 112, -440, -96, 24, -644, -184,
71 56, -432, 224, -980, 272, -260, 144, -436, 420, 356, 364,
72 -528, 76, 172, -744, -368, 404, -752, -416, 684, -688, 72,
73 540, 416, 92, 444, 480, -72, -1416, 164, -1172, -68, 24,
74 424, 264, 1040, 128, -912, -524, -356, 64, 876, -12, 4,
75 -88, 532, 272, -524, 320, 276, -508, 940, 24, -400, -120,
76 756, 60, 236, -412, 100, 376, -484, 400, -100, -740, -108,
77 -260, 328, -268, 224, -200, -416, 184, -604, -564, -20, 296,
78 60, 892, -888, 60, 164, 68, -760, 216, -296, 904, -336,
79 -28, 404, -356, -568, -208, -1480, -512, 296, 328, -360, -164,
80 -1560, -776, 1156, -428, 164, -504, -112, 120, -216, -148, -264,
81 308, 32, 64, -72, 72, 116, 176, -64, -272, 460, -536,
82 -784, -280, 348, 108, -752, -132, 524, -540, -776, 116, -296,
83 -1196, -288, -560, 1040, -472, 116, -848, -1116, 116, 636, 696,
84 284, -176, 1016, 204, -864, -648, -248, 356, 972, -584, -204,
85 264, 880, 528, -24, -184, 116, 448, -144, 828, 524, 212,
86 -212, 52, 12, 200, 268, -488, -404, -880, 824, -672, -40,
87 908, -248, 500, 716, -576, 492, -576, 16, 720, -108, 384,
88 124, 344, 280, 576, -500, 252, 104, -308, 196, -188, -8,
89 1268, 296, 1032, -1196, 436, 316, 372, -432, -200, -660, 704,
90 -224, 596, -132, 268, 32, -452, 884, 104, -1008, 424, -1348,
91 -280, 4, -1168, 368, 476, 696, 300, -8, 24, 180, -592,
92 -196, 388, 304, 500, 724, -160, 244, -84, 272, -256, -420,
93 320, 208, -144, -156, 156, 364, 452, 28, 540, 316, 220,
94 -644, -248, 464, 72, 360, 32, -388, 496, -680, -48, 208,
95 -116, -408, 60, -604, -392, 548, -840, 784, -460, 656, -544,
96 -388, -264, 908, -800, -628, -612, -568, 572, -220, 164, 288,
97 -16, -308, 308, -112, -636, -760, 280, -668, 432, 364, 240,
98 -196, 604, 340, 384, 196, 592, -44, -500, 432, -580, -132,
99 636, -76, 392, 4, -412, 540, 508, 328, -356, -36, 16,
100 -220, -64, -248, -60, 24, -192, 368, 1040, 92, -24, -1044,
101 -32, 40, 104, 148, 192, -136, -520, 56, -816, -224, 732,
102 392, 356, 212, -80, -424, -1008, -324, 588, -1496, 576, 460,
103 -816, -848, 56, -580, -92, -1372, -112, -496, 200, 364, 52,
104 -140, 48, -48, -60, 84, 72, 40, 132, -356, -268, -104,
105 -284, -404, 732, -520, 164, -304, -540, 120, 328, -76, -460,
106 756, 388, 588, 236, -436, -72, -176, -404, -316, -148, 716,
107 -604, 404, -72, -88, -888, -68, 944, 88, -220, -344, 960,
108 472, 460, -232, 704, 120, 832, -228, 692, -508, 132, -476,
109 844, -748, -364, -44, 1116, -1104, -1056, 76, 428, 552, -692,
110 60, 356, 96, -384, -188, -612, -576, 736, 508, 892, 352,
111 -1132, 504, -24, -352, 324, 332, -600, -312, 292, 508, -144,
112 -8, 484, 48, 284, -260, -240, 256, -100, -292, -204, -44,
113 472, -204, 908, -188, -1000, -256, 92, 1164, -392, 564, 356,
114 652, -28, -884, 256, 484, -192, 760, -176, 376, -524, -452,
115 -436, 860, -736, 212, 124, 504, -476, 468, 76, -472, 552,
116 -692, -944, -620, 740, -240, 400, 132, 20, 192, -196, 264,
117 -668, -1012, -60, 296, -316, -828, 76, -156, 284, -768, -448,
118 -832, 148, 248, 652, 616, 1236, 288, -328, -400, -124, 588,
119 220, 520, -696, 1032, 768, -740, -92, -272, 296, 448, -464,
120 412, -200, 392, 440, -200, 264, -152, -260, 320, 1032, 216,
121 320, -8, -64, 156, -1016, 1084, 1172, 536, 484, -432, 132,
122 372, -52, -256, 84, 116, -352, 48, 116, 304, -384, 412,
123 924, -300, 528, 628, 180, 648, 44, -980, -220, 1320, 48,
124 332, 748, 524, -268, -720, 540, -276, 564, -344, -208, -196,
125 436, 896, 88, -392, 132, 80, -964, -288, 568, 56, -48,
126 -456, 888, 8, 552, -156, -292, 948, 288, 128, -716, -292,
127 1192, -152, 876, 352, -600, -260, -812, -468, -28, -120, -32,
128 -44, 1284, 496, 192, 464, 312, -76, -516, -380, -456, -1012,
129 -48, 308, -156, 36, 492, -156, -808, 188, 1652, 68, -120,
130 -116, 316, 160, -140, 352, 808, -416, 592, 316, -480, 56,
131 528, -204, -568, 372, -232, 752, -344, 744, -4, 324, -416,
132 -600, 768, 268, -248, -88, -132, -420, -432, 80, -288, 404,
133 -316, -1216, -588, 520, -108, 92, -320, 368, -480, -216, -92,
134 1688, -300, 180, 1020, -176, 820, -68, -228, -260, 436, -904,
135 20, 40, -508, 440, -736, 312, 332, 204, 760, -372, 728,
136 96, -20, -632, -520, -560, 336, 1076, -64, -532, 776, 584,
137 192, 396, -728, -520, 276, -188, 80, -52, -612, -252, -48,
138 648, 212, -688, 228, -52, -260, 428, -412, -272, -404, 180,
139 816, -796, 48, 152, 484, -88, -216, 988, 696, 188, -528,
140 648, -116, -180, 316, 476, 12, -564, 96, 476, -252, -364,
141 -376, -392, 556, -256, -576, 260, -352, 120, -16, -136, -260,
142 -492, 72, 556, 660, 580, 616, 772, 436, 424, -32, -324,
143 -1268, 416, -324, -80, 920, 160, 228, 724, 32, -516, 64,
144 384, 68, -128, 136, 240, 248, -204, -68, 252, -932, -120,
145 -480, -628, -84, 192, 852, -404, -288, -132, 204, 100, 168,
146 -68, -196, -868, 460, 1080, 380, -80, 244, 0, 484, -888,
147 64, 184, 352, 600, 460, 164, 604, -196, 320, -64, 588,
148 -184, 228, 12, 372, 48, -848, -344, 224, 208, -200, 484,
149 128, -20, 272, -468, -840, 384, 256, -720, -520, -464, -580,
150 112, -120, 644, -356, -208, -608, -528, 704, 560, -424, 392,
151 828, 40, 84, 200, -152, 0, -144, 584, 280, -120, 80,
152 -556, -972, -196, -472, 724, 80, 168, -32, 88, 160, -688,
153 0, 160, 356, 372, -776, 740, -128, 676, -248, -480, 4,
154 -364, 96, 544, 232, -1032, 956, 236, 356, 20, -40, 300,
155 24, -676, -596, 132, 1120, -104, 532, -1096, 568, 648, 444,
156 508, 380, 188, -376, -604, 1488, 424, 24, 756, -220, -192,
157 716, 120, 920, 688, 168, 44, -460, 568, 284, 1144, 1160,
158 600, 424, 888, 656, -356, -320, 220, 316, -176, -724, -188,
159 -816, -628, -348, -228, -380, 1012, -452, -660, 736, 928, 404,
160 -696, -72, -268, -892, 128, 184, -344, -780, 360, 336, 400,
161 344, 428, 548, -112, 136, -228, -216, -820, -516, 340, 92,
162 -136, 116, -300, 376, -244, 100, -316, -520, -284, -12, 824,
163 164, -548, -180, -128, 116, -924, -828, 268, -368, -580, 620,
164 192, 160, 0, -1676, 1068, 424, -56, -360, 468, -156, 720,
165 288, -528, 556, -364, 548, -148, 504, 316, 152, -648, -620,
166 -684, -24, -376, -384, -108, -920, -1032, 768, 180, -264, -508,
167 -1268, -260, -60, 300, -240, 988, 724, -376, -576, -212, -736,
168 556, 192, 1092, -620, -880, 376, -56, -4, -216, -32, 836,
169 268, 396, 1332, 864, -600, 100, 56, -412, -92, 356, 180,
170 884, -468, -436, 292, -388, -804, -704, -840, 368, -348, 140,
171 -724, 1536, 940, 372, 112, -372, 436, -480, 1136, 296, -32,
172 -228, 132, -48, -220, 868, -1016, -60, -1044, -464, 328, 916,
173 244, 12, -736, -296, 360, 468, -376, -108, -92, 788, 368,
174 -56, 544, 400, -672, -420, 728, 16, 320, 44, -284, -380,
175 -796, 488, 132, 204, -596, -372, 88, -152, -908, -636, -572,
176 -624, -116, -692, -200, -56, 276, -88, 484, -324, 948, 864,
177 1000, -456, -184, -276, 292, -296, 156, 676, 320, 160, 908,
178 -84, -1236, -288, -116, 260, -372, -644, 732, -756, -96, 84,
179 344, -520, 348, -688, 240, -84, 216, -1044, -136, -676, -396,
180 -1500, 960, -40, 176, 168, 1516, 420, -504, -344, -364, -360,
181 1216, -940, -380, -212, 252, -660, -708, 484, -444, -152, 928,
182 -120, 1112, 476, -260, 560, -148, -344, 108, -196, 228, -288,
183 504, 560, -328, -88, 288, -1008, 460, -228, 468, -836, -196,
184 76, 388, 232, 412, -1168, -716, -644, 756, -172, -356, -504,
185 116, 432, 528, 48, 476, -168, -608, 448, 160, -532, -272,
186 28, -676, -12, 828, 980, 456, 520, 104, -104, 256, -344,
187 -4, -28, -368, -52, -524, -572, -556, -200, 768, 1124, -208,
188 -512, 176, 232, 248, -148, -888, 604, -600, -304, 804, -156,
189 -212, 488, -192, -804, -256, 368, -360, -916, -328, 228, -240,
190 -448, -472, 856, -556, -364, 572, -12, -156, -368, -340, 432,
191 252, -752, -152, 288, 268, -580, -848, -592, 108, -76, 244,
192 312, -716, 592, -80, 436, 360, 4, -248, 160, 516, 584,
193 732, 44, -468, -280, -292, -156, -588, 28, 308, 912, 24,
194 124, 156, 180, -252, 944, -924, -772, -520, -428, -624, 300,
195 -212, -1144, 32, -724, 800, -1128, -212, -1288, -848, 180, -416,
196 440, 192, -576, -792, -76, -1080, 80, -532, -352, -132, 380,
197 -820, 148, 1112, 128, 164, 456, 700, -924, 144, -668, -384,
198 648, -832, 508, 552, -52, -100, -656, 208, -568, 748, -88,
199 680, 232, 300, 192, -408, -1012, -152, -252, -268, 272, -876,
200 -664, -648, -332, -136, 16, 12, 1152, -28, 332, -536, 320,
201 -672, -460, -316, 532, -260, 228, -40, 1052, -816, 180, 88,
202 -496, -556, -672, -368, 428, 92, 356, 404, -408, 252, 196,
203 -176, -556, 792, 268, 32, 372, 40, 96, -332, 328, 120,
204 372, -900, -40, 472, -264, -592, 952, 128, 656, 112, 664,
205 -232, 420, 4, -344, -464, 556, 244, -416, -32, 252, 0,
206 -412, 188, -696, 508, -476, 324, -1096, 656, -312, 560, 264,
207 -136, 304, 160, -64, -580, 248, 336, -720, 560, -348, -288,
208 -276, -196, -500, 852, -544, -236, -1128, -992, -776, 116, 56,
209 52, 860, 884, 212, -12, 168, 1020, 512, -552, 924, -148,
210 716, 188, 164, -340, -520, -184, 880, -152, -680, -208, -1156,
211 -300, -528, -472, 364, 100, -744, -1056, -32, 540, 280, 144,
212 -676, -32, -232, -280, -224, 96, 568, -76, 172, 148, 148,
213 104, 32, -296, -32, 788, -80, 32, -16, 280, 288, 944,
214 428, -484
215 };
216
217 static const int gauss_bits = 11;
218
219 static int luma_subblock_size_y = 32;
220 static int luma_subblock_size_x = 32;
221
222 static int chroma_subblock_size_y = 16;
223 static int chroma_subblock_size_x = 16;
224
225 static const int min_luma_legal_range = 16;
226 static const int max_luma_legal_range = 235;
227
228 static const int min_chroma_legal_range = 16;
229 static const int max_chroma_legal_range = 240;
230
231 static int scaling_lut_y[256];
232 static int scaling_lut_cb[256];
233 static int scaling_lut_cr[256];
234
235 static int grain_min;
236 static int grain_max;
237
238 static uint16_t random_register = 0; // random number generator register
239
init_arrays(const aom_film_grain_t * params,int luma_stride,int chroma_stride,int *** pred_pos_luma_p,int *** pred_pos_chroma_p,int ** luma_grain_block,int ** cb_grain_block,int ** cr_grain_block,int ** y_line_buf,int ** cb_line_buf,int ** cr_line_buf,int ** y_col_buf,int ** cb_col_buf,int ** cr_col_buf,int luma_grain_samples,int chroma_grain_samples,int chroma_subsamp_y,int chroma_subsamp_x)240 static void init_arrays(const aom_film_grain_t *params, int luma_stride,
241 int chroma_stride, int ***pred_pos_luma_p,
242 int ***pred_pos_chroma_p, int **luma_grain_block,
243 int **cb_grain_block, int **cr_grain_block,
244 int **y_line_buf, int **cb_line_buf, int **cr_line_buf,
245 int **y_col_buf, int **cb_col_buf, int **cr_col_buf,
246 int luma_grain_samples, int chroma_grain_samples,
247 int chroma_subsamp_y, int chroma_subsamp_x) {
248 memset(scaling_lut_y, 0, sizeof(*scaling_lut_y) * 256);
249 memset(scaling_lut_cb, 0, sizeof(*scaling_lut_cb) * 256);
250 memset(scaling_lut_cr, 0, sizeof(*scaling_lut_cr) * 256);
251
252 int num_pos_luma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
253 int num_pos_chroma = num_pos_luma;
254 if (params->num_y_points > 0) ++num_pos_chroma;
255
256 int **pred_pos_luma;
257 int **pred_pos_chroma;
258
259 pred_pos_luma = (int **)aom_malloc(sizeof(*pred_pos_luma) * num_pos_luma);
260
261 for (int row = 0; row < num_pos_luma; row++) {
262 pred_pos_luma[row] = (int *)aom_malloc(sizeof(**pred_pos_luma) * 3);
263 }
264
265 pred_pos_chroma =
266 (int **)aom_malloc(sizeof(*pred_pos_chroma) * num_pos_chroma);
267
268 for (int row = 0; row < num_pos_chroma; row++) {
269 pred_pos_chroma[row] = (int *)aom_malloc(sizeof(**pred_pos_chroma) * 3);
270 }
271
272 int pos_ar_index = 0;
273
274 for (int row = -params->ar_coeff_lag; row < 0; row++) {
275 for (int col = -params->ar_coeff_lag; col < params->ar_coeff_lag + 1;
276 col++) {
277 pred_pos_luma[pos_ar_index][0] = row;
278 pred_pos_luma[pos_ar_index][1] = col;
279 pred_pos_luma[pos_ar_index][2] = 0;
280
281 pred_pos_chroma[pos_ar_index][0] = row;
282 pred_pos_chroma[pos_ar_index][1] = col;
283 pred_pos_chroma[pos_ar_index][2] = 0;
284 ++pos_ar_index;
285 }
286 }
287
288 for (int col = -params->ar_coeff_lag; col < 0; col++) {
289 pred_pos_luma[pos_ar_index][0] = 0;
290 pred_pos_luma[pos_ar_index][1] = col;
291 pred_pos_luma[pos_ar_index][2] = 0;
292
293 pred_pos_chroma[pos_ar_index][0] = 0;
294 pred_pos_chroma[pos_ar_index][1] = col;
295 pred_pos_chroma[pos_ar_index][2] = 0;
296
297 ++pos_ar_index;
298 }
299
300 if (params->num_y_points > 0) {
301 pred_pos_chroma[pos_ar_index][0] = 0;
302 pred_pos_chroma[pos_ar_index][1] = 0;
303 pred_pos_chroma[pos_ar_index][2] = 1;
304 }
305
306 *pred_pos_luma_p = pred_pos_luma;
307 *pred_pos_chroma_p = pred_pos_chroma;
308
309 *y_line_buf = (int *)aom_malloc(sizeof(**y_line_buf) * luma_stride * 2);
310 *cb_line_buf = (int *)aom_malloc(sizeof(**cb_line_buf) * chroma_stride *
311 (2 >> chroma_subsamp_y));
312 *cr_line_buf = (int *)aom_malloc(sizeof(**cr_line_buf) * chroma_stride *
313 (2 >> chroma_subsamp_y));
314
315 *y_col_buf =
316 (int *)aom_malloc(sizeof(**y_col_buf) * (luma_subblock_size_y + 2) * 2);
317 *cb_col_buf =
318 (int *)aom_malloc(sizeof(**cb_col_buf) *
319 (chroma_subblock_size_y + (2 >> chroma_subsamp_y)) *
320 (2 >> chroma_subsamp_x));
321 *cr_col_buf =
322 (int *)aom_malloc(sizeof(**cr_col_buf) *
323 (chroma_subblock_size_y + (2 >> chroma_subsamp_y)) *
324 (2 >> chroma_subsamp_x));
325
326 *luma_grain_block =
327 (int *)aom_malloc(sizeof(**luma_grain_block) * luma_grain_samples);
328 *cb_grain_block =
329 (int *)aom_malloc(sizeof(**cb_grain_block) * chroma_grain_samples);
330 *cr_grain_block =
331 (int *)aom_malloc(sizeof(**cr_grain_block) * chroma_grain_samples);
332 }
333
dealloc_arrays(const aom_film_grain_t * params,int *** pred_pos_luma,int *** pred_pos_chroma,int ** luma_grain_block,int ** cb_grain_block,int ** cr_grain_block,int ** y_line_buf,int ** cb_line_buf,int ** cr_line_buf,int ** y_col_buf,int ** cb_col_buf,int ** cr_col_buf)334 static void dealloc_arrays(const aom_film_grain_t *params, int ***pred_pos_luma,
335 int ***pred_pos_chroma, int **luma_grain_block,
336 int **cb_grain_block, int **cr_grain_block,
337 int **y_line_buf, int **cb_line_buf,
338 int **cr_line_buf, int **y_col_buf, int **cb_col_buf,
339 int **cr_col_buf) {
340 int num_pos_luma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
341 int num_pos_chroma = num_pos_luma;
342 if (params->num_y_points > 0) ++num_pos_chroma;
343
344 for (int row = 0; row < num_pos_luma; row++) {
345 aom_free((*pred_pos_luma)[row]);
346 }
347 aom_free(*pred_pos_luma);
348
349 for (int row = 0; row < num_pos_chroma; row++) {
350 aom_free((*pred_pos_chroma)[row]);
351 }
352 aom_free((*pred_pos_chroma));
353
354 aom_free(*y_line_buf);
355
356 aom_free(*cb_line_buf);
357
358 aom_free(*cr_line_buf);
359
360 aom_free(*y_col_buf);
361
362 aom_free(*cb_col_buf);
363
364 aom_free(*cr_col_buf);
365
366 aom_free(*luma_grain_block);
367
368 aom_free(*cb_grain_block);
369
370 aom_free(*cr_grain_block);
371 }
372
373 // get a number between 0 and 2^bits - 1
get_random_number(int bits)374 static INLINE int get_random_number(int bits) {
375 uint16_t bit;
376 bit = ((random_register >> 0) ^ (random_register >> 1) ^
377 (random_register >> 3) ^ (random_register >> 12)) &
378 1;
379 random_register = (random_register >> 1) | (bit << 15);
380 return (random_register >> (16 - bits)) & ((1 << bits) - 1);
381 }
382
init_random_generator(int luma_line,uint16_t seed)383 static void init_random_generator(int luma_line, uint16_t seed) {
384 // same for the picture
385
386 uint16_t msb = (seed >> 8) & 255;
387 uint16_t lsb = seed & 255;
388
389 random_register = (msb << 8) + lsb;
390
391 // changes for each row
392 int luma_num = luma_line >> 5;
393
394 random_register ^= ((luma_num * 37 + 178) & 255) << 8;
395 random_register ^= ((luma_num * 173 + 105) & 255);
396 }
397
398 // Return 0 for success, -1 for failure
generate_luma_grain_block(const aom_film_grain_t * params,int ** pred_pos_luma,int * luma_grain_block,int luma_block_size_y,int luma_block_size_x,int luma_grain_stride,int left_pad,int top_pad,int right_pad,int bottom_pad)399 static int generate_luma_grain_block(
400 const aom_film_grain_t *params, int **pred_pos_luma, int *luma_grain_block,
401 int luma_block_size_y, int luma_block_size_x, int luma_grain_stride,
402 int left_pad, int top_pad, int right_pad, int bottom_pad) {
403 if (params->num_y_points == 0) {
404 memset(luma_grain_block, 0,
405 sizeof(*luma_grain_block) * luma_block_size_y * luma_grain_stride);
406 return 0;
407 }
408
409 int bit_depth = params->bit_depth;
410 int gauss_sec_shift = 12 - bit_depth + params->grain_scale_shift;
411
412 int num_pos_luma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
413 int rounding_offset = (1 << (params->ar_coeff_shift - 1));
414
415 for (int i = 0; i < luma_block_size_y; i++)
416 for (int j = 0; j < luma_block_size_x; j++)
417 luma_grain_block[i * luma_grain_stride + j] =
418 (gaussian_sequence[get_random_number(gauss_bits)] +
419 ((1 << gauss_sec_shift) >> 1)) >>
420 gauss_sec_shift;
421
422 for (int i = top_pad; i < luma_block_size_y - bottom_pad; i++)
423 for (int j = left_pad; j < luma_block_size_x - right_pad; j++) {
424 int wsum = 0;
425 for (int pos = 0; pos < num_pos_luma; pos++) {
426 wsum = wsum + params->ar_coeffs_y[pos] *
427 luma_grain_block[(i + pred_pos_luma[pos][0]) *
428 luma_grain_stride +
429 j + pred_pos_luma[pos][1]];
430 }
431 luma_grain_block[i * luma_grain_stride + j] =
432 clamp(luma_grain_block[i * luma_grain_stride + j] +
433 ((wsum + rounding_offset) >> params->ar_coeff_shift),
434 grain_min, grain_max);
435 }
436 return 0;
437 }
438
439 // Return 0 for success, -1 for failure
generate_chroma_grain_blocks(const aom_film_grain_t * params,int ** pred_pos_chroma,int * luma_grain_block,int * cb_grain_block,int * cr_grain_block,int luma_grain_stride,int chroma_block_size_y,int chroma_block_size_x,int chroma_grain_stride,int left_pad,int top_pad,int right_pad,int bottom_pad,int chroma_subsamp_y,int chroma_subsamp_x)440 static int generate_chroma_grain_blocks(
441 const aom_film_grain_t *params,
442 // int** pred_pos_luma,
443 int **pred_pos_chroma, int *luma_grain_block, int *cb_grain_block,
444 int *cr_grain_block, int luma_grain_stride, int chroma_block_size_y,
445 int chroma_block_size_x, int chroma_grain_stride, int left_pad, int top_pad,
446 int right_pad, int bottom_pad, int chroma_subsamp_y, int chroma_subsamp_x) {
447 int bit_depth = params->bit_depth;
448 int gauss_sec_shift = 12 - bit_depth + params->grain_scale_shift;
449
450 int num_pos_chroma = 2 * params->ar_coeff_lag * (params->ar_coeff_lag + 1);
451 if (params->num_y_points > 0) ++num_pos_chroma;
452 int rounding_offset = (1 << (params->ar_coeff_shift - 1));
453 int chroma_grain_block_size = chroma_block_size_y * chroma_grain_stride;
454
455 if (params->num_cb_points || params->chroma_scaling_from_luma) {
456 init_random_generator(7 << 5, params->random_seed);
457
458 for (int i = 0; i < chroma_block_size_y; i++)
459 for (int j = 0; j < chroma_block_size_x; j++)
460 cb_grain_block[i * chroma_grain_stride + j] =
461 (gaussian_sequence[get_random_number(gauss_bits)] +
462 ((1 << gauss_sec_shift) >> 1)) >>
463 gauss_sec_shift;
464 } else {
465 memset(cb_grain_block, 0,
466 sizeof(*cb_grain_block) * chroma_grain_block_size);
467 }
468
469 if (params->num_cr_points || params->chroma_scaling_from_luma) {
470 init_random_generator(11 << 5, params->random_seed);
471
472 for (int i = 0; i < chroma_block_size_y; i++)
473 for (int j = 0; j < chroma_block_size_x; j++)
474 cr_grain_block[i * chroma_grain_stride + j] =
475 (gaussian_sequence[get_random_number(gauss_bits)] +
476 ((1 << gauss_sec_shift) >> 1)) >>
477 gauss_sec_shift;
478 } else {
479 memset(cr_grain_block, 0,
480 sizeof(*cr_grain_block) * chroma_grain_block_size);
481 }
482
483 for (int i = top_pad; i < chroma_block_size_y - bottom_pad; i++)
484 for (int j = left_pad; j < chroma_block_size_x - right_pad; j++) {
485 int wsum_cb = 0;
486 int wsum_cr = 0;
487 for (int pos = 0; pos < num_pos_chroma; pos++) {
488 if (pred_pos_chroma[pos][2] == 0) {
489 wsum_cb = wsum_cb + params->ar_coeffs_cb[pos] *
490 cb_grain_block[(i + pred_pos_chroma[pos][0]) *
491 chroma_grain_stride +
492 j + pred_pos_chroma[pos][1]];
493 wsum_cr = wsum_cr + params->ar_coeffs_cr[pos] *
494 cr_grain_block[(i + pred_pos_chroma[pos][0]) *
495 chroma_grain_stride +
496 j + pred_pos_chroma[pos][1]];
497 } else if (pred_pos_chroma[pos][2] == 1) {
498 int av_luma = 0;
499 int luma_coord_y = ((i - top_pad) << chroma_subsamp_y) + top_pad;
500 int luma_coord_x = ((j - left_pad) << chroma_subsamp_x) + left_pad;
501
502 for (int k = luma_coord_y; k < luma_coord_y + chroma_subsamp_y + 1;
503 k++)
504 for (int l = luma_coord_x; l < luma_coord_x + chroma_subsamp_x + 1;
505 l++)
506 av_luma += luma_grain_block[k * luma_grain_stride + l];
507
508 av_luma =
509 (av_luma + ((1 << (chroma_subsamp_y + chroma_subsamp_x)) >> 1)) >>
510 (chroma_subsamp_y + chroma_subsamp_x);
511
512 wsum_cb = wsum_cb + params->ar_coeffs_cb[pos] * av_luma;
513 wsum_cr = wsum_cr + params->ar_coeffs_cr[pos] * av_luma;
514 } else {
515 fprintf(
516 stderr,
517 "Grain synthesis: prediction between two chroma components is "
518 "not supported!");
519 return -1;
520 }
521 }
522 if (params->num_cb_points || params->chroma_scaling_from_luma)
523 cb_grain_block[i * chroma_grain_stride + j] =
524 clamp(cb_grain_block[i * chroma_grain_stride + j] +
525 ((wsum_cb + rounding_offset) >> params->ar_coeff_shift),
526 grain_min, grain_max);
527 if (params->num_cr_points || params->chroma_scaling_from_luma)
528 cr_grain_block[i * chroma_grain_stride + j] =
529 clamp(cr_grain_block[i * chroma_grain_stride + j] +
530 ((wsum_cr + rounding_offset) >> params->ar_coeff_shift),
531 grain_min, grain_max);
532 }
533 return 0;
534 }
535
init_scaling_function(const int scaling_points[][2],int num_points,int scaling_lut[])536 static void init_scaling_function(const int scaling_points[][2], int num_points,
537 int scaling_lut[]) {
538 if (num_points == 0) return;
539
540 for (int i = 0; i < scaling_points[0][0]; i++)
541 scaling_lut[i] = scaling_points[0][1];
542
543 for (int point = 0; point < num_points - 1; point++) {
544 int delta_y = scaling_points[point + 1][1] - scaling_points[point][1];
545 int delta_x = scaling_points[point + 1][0] - scaling_points[point][0];
546
547 int64_t delta = delta_y * ((65536 + (delta_x >> 1)) / delta_x);
548
549 for (int x = 0; x < delta_x; x++) {
550 scaling_lut[scaling_points[point][0] + x] =
551 scaling_points[point][1] + (int)((x * delta + 32768) >> 16);
552 }
553 }
554
555 for (int i = scaling_points[num_points - 1][0]; i < 256; i++)
556 scaling_lut[i] = scaling_points[num_points - 1][1];
557 }
558
559 // function that extracts samples from a LUT (and interpolates intemediate
560 // frames for 10- and 12-bit video)
scale_LUT(int * scaling_lut,int index,int bit_depth)561 static int scale_LUT(int *scaling_lut, int index, int bit_depth) {
562 int x = index >> (bit_depth - 8);
563
564 if (!(bit_depth - 8) || x == 255)
565 return scaling_lut[x];
566 else
567 return scaling_lut[x] + (((scaling_lut[x + 1] - scaling_lut[x]) *
568 (index & ((1 << (bit_depth - 8)) - 1)) +
569 (1 << (bit_depth - 9))) >>
570 (bit_depth - 8));
571 }
572
add_noise_to_block(const aom_film_grain_t * params,uint8_t * luma,uint8_t * cb,uint8_t * cr,int luma_stride,int chroma_stride,int * luma_grain,int * cb_grain,int * cr_grain,int luma_grain_stride,int chroma_grain_stride,int half_luma_height,int half_luma_width,int bit_depth,int chroma_subsamp_y,int chroma_subsamp_x,int mc_identity)573 static void add_noise_to_block(const aom_film_grain_t *params, uint8_t *luma,
574 uint8_t *cb, uint8_t *cr, int luma_stride,
575 int chroma_stride, int *luma_grain,
576 int *cb_grain, int *cr_grain,
577 int luma_grain_stride, int chroma_grain_stride,
578 int half_luma_height, int half_luma_width,
579 int bit_depth, int chroma_subsamp_y,
580 int chroma_subsamp_x, int mc_identity) {
581 int cb_mult = params->cb_mult - 128; // fixed scale
582 int cb_luma_mult = params->cb_luma_mult - 128; // fixed scale
583 int cb_offset = params->cb_offset - 256;
584
585 int cr_mult = params->cr_mult - 128; // fixed scale
586 int cr_luma_mult = params->cr_luma_mult - 128; // fixed scale
587 int cr_offset = params->cr_offset - 256;
588
589 int rounding_offset = (1 << (params->scaling_shift - 1));
590
591 int apply_y = params->num_y_points > 0 ? 1 : 0;
592 int apply_cb =
593 (params->num_cb_points > 0 || params->chroma_scaling_from_luma) ? 1 : 0;
594 int apply_cr =
595 (params->num_cr_points > 0 || params->chroma_scaling_from_luma) ? 1 : 0;
596
597 if (params->chroma_scaling_from_luma) {
598 cb_mult = 0; // fixed scale
599 cb_luma_mult = 64; // fixed scale
600 cb_offset = 0;
601
602 cr_mult = 0; // fixed scale
603 cr_luma_mult = 64; // fixed scale
604 cr_offset = 0;
605 }
606
607 int min_luma, max_luma, min_chroma, max_chroma;
608
609 if (params->clip_to_restricted_range) {
610 min_luma = min_luma_legal_range;
611 max_luma = max_luma_legal_range;
612
613 if (mc_identity) {
614 min_chroma = min_luma_legal_range;
615 max_chroma = max_luma_legal_range;
616 } else {
617 min_chroma = min_chroma_legal_range;
618 max_chroma = max_chroma_legal_range;
619 }
620 } else {
621 min_luma = min_chroma = 0;
622 max_luma = max_chroma = 255;
623 }
624
625 for (int i = 0; i < (half_luma_height << (1 - chroma_subsamp_y)); i++) {
626 for (int j = 0; j < (half_luma_width << (1 - chroma_subsamp_x)); j++) {
627 int average_luma = 0;
628 if (chroma_subsamp_x) {
629 average_luma = (luma[(i << chroma_subsamp_y) * luma_stride +
630 (j << chroma_subsamp_x)] +
631 luma[(i << chroma_subsamp_y) * luma_stride +
632 (j << chroma_subsamp_x) + 1] +
633 1) >>
634 1;
635 } else {
636 average_luma = luma[(i << chroma_subsamp_y) * luma_stride + j];
637 }
638
639 if (apply_cb) {
640 cb[i * chroma_stride + j] = clamp(
641 cb[i * chroma_stride + j] +
642 ((scale_LUT(scaling_lut_cb,
643 clamp(((average_luma * cb_luma_mult +
644 cb_mult * cb[i * chroma_stride + j]) >>
645 6) +
646 cb_offset,
647 0, (256 << (bit_depth - 8)) - 1),
648 8) *
649 cb_grain[i * chroma_grain_stride + j] +
650 rounding_offset) >>
651 params->scaling_shift),
652 min_chroma, max_chroma);
653 }
654
655 if (apply_cr) {
656 cr[i * chroma_stride + j] = clamp(
657 cr[i * chroma_stride + j] +
658 ((scale_LUT(scaling_lut_cr,
659 clamp(((average_luma * cr_luma_mult +
660 cr_mult * cr[i * chroma_stride + j]) >>
661 6) +
662 cr_offset,
663 0, (256 << (bit_depth - 8)) - 1),
664 8) *
665 cr_grain[i * chroma_grain_stride + j] +
666 rounding_offset) >>
667 params->scaling_shift),
668 min_chroma, max_chroma);
669 }
670 }
671 }
672
673 if (apply_y) {
674 for (int i = 0; i < (half_luma_height << 1); i++) {
675 for (int j = 0; j < (half_luma_width << 1); j++) {
676 luma[i * luma_stride + j] =
677 clamp(luma[i * luma_stride + j] +
678 ((scale_LUT(scaling_lut_y, luma[i * luma_stride + j], 8) *
679 luma_grain[i * luma_grain_stride + j] +
680 rounding_offset) >>
681 params->scaling_shift),
682 min_luma, max_luma);
683 }
684 }
685 }
686 }
687
add_noise_to_block_hbd(const aom_film_grain_t * params,uint16_t * luma,uint16_t * cb,uint16_t * cr,int luma_stride,int chroma_stride,int * luma_grain,int * cb_grain,int * cr_grain,int luma_grain_stride,int chroma_grain_stride,int half_luma_height,int half_luma_width,int bit_depth,int chroma_subsamp_y,int chroma_subsamp_x,int mc_identity)688 static void add_noise_to_block_hbd(
689 const aom_film_grain_t *params, uint16_t *luma, uint16_t *cb, uint16_t *cr,
690 int luma_stride, int chroma_stride, int *luma_grain, int *cb_grain,
691 int *cr_grain, int luma_grain_stride, int chroma_grain_stride,
692 int half_luma_height, int half_luma_width, int bit_depth,
693 int chroma_subsamp_y, int chroma_subsamp_x, int mc_identity) {
694 int cb_mult = params->cb_mult - 128; // fixed scale
695 int cb_luma_mult = params->cb_luma_mult - 128; // fixed scale
696 // offset value depends on the bit depth
697 int cb_offset = (params->cb_offset << (bit_depth - 8)) - (1 << bit_depth);
698
699 int cr_mult = params->cr_mult - 128; // fixed scale
700 int cr_luma_mult = params->cr_luma_mult - 128; // fixed scale
701 // offset value depends on the bit depth
702 int cr_offset = (params->cr_offset << (bit_depth - 8)) - (1 << bit_depth);
703
704 int rounding_offset = (1 << (params->scaling_shift - 1));
705
706 int apply_y = params->num_y_points > 0 ? 1 : 0;
707 int apply_cb =
708 (params->num_cb_points > 0 || params->chroma_scaling_from_luma) > 0 ? 1
709 : 0;
710 int apply_cr =
711 (params->num_cr_points > 0 || params->chroma_scaling_from_luma) > 0 ? 1
712 : 0;
713
714 if (params->chroma_scaling_from_luma) {
715 cb_mult = 0; // fixed scale
716 cb_luma_mult = 64; // fixed scale
717 cb_offset = 0;
718
719 cr_mult = 0; // fixed scale
720 cr_luma_mult = 64; // fixed scale
721 cr_offset = 0;
722 }
723
724 int min_luma, max_luma, min_chroma, max_chroma;
725
726 if (params->clip_to_restricted_range) {
727 min_luma = min_luma_legal_range << (bit_depth - 8);
728 max_luma = max_luma_legal_range << (bit_depth - 8);
729
730 if (mc_identity) {
731 min_chroma = min_luma_legal_range << (bit_depth - 8);
732 max_chroma = max_luma_legal_range << (bit_depth - 8);
733 } else {
734 min_chroma = min_chroma_legal_range << (bit_depth - 8);
735 max_chroma = max_chroma_legal_range << (bit_depth - 8);
736 }
737 } else {
738 min_luma = min_chroma = 0;
739 max_luma = max_chroma = (256 << (bit_depth - 8)) - 1;
740 }
741
742 for (int i = 0; i < (half_luma_height << (1 - chroma_subsamp_y)); i++) {
743 for (int j = 0; j < (half_luma_width << (1 - chroma_subsamp_x)); j++) {
744 int average_luma = 0;
745 if (chroma_subsamp_x) {
746 average_luma = (luma[(i << chroma_subsamp_y) * luma_stride +
747 (j << chroma_subsamp_x)] +
748 luma[(i << chroma_subsamp_y) * luma_stride +
749 (j << chroma_subsamp_x) + 1] +
750 1) >>
751 1;
752 } else {
753 average_luma = luma[(i << chroma_subsamp_y) * luma_stride + j];
754 }
755
756 if (apply_cb) {
757 cb[i * chroma_stride + j] = clamp(
758 cb[i * chroma_stride + j] +
759 ((scale_LUT(scaling_lut_cb,
760 clamp(((average_luma * cb_luma_mult +
761 cb_mult * cb[i * chroma_stride + j]) >>
762 6) +
763 cb_offset,
764 0, (256 << (bit_depth - 8)) - 1),
765 bit_depth) *
766 cb_grain[i * chroma_grain_stride + j] +
767 rounding_offset) >>
768 params->scaling_shift),
769 min_chroma, max_chroma);
770 }
771 if (apply_cr) {
772 cr[i * chroma_stride + j] = clamp(
773 cr[i * chroma_stride + j] +
774 ((scale_LUT(scaling_lut_cr,
775 clamp(((average_luma * cr_luma_mult +
776 cr_mult * cr[i * chroma_stride + j]) >>
777 6) +
778 cr_offset,
779 0, (256 << (bit_depth - 8)) - 1),
780 bit_depth) *
781 cr_grain[i * chroma_grain_stride + j] +
782 rounding_offset) >>
783 params->scaling_shift),
784 min_chroma, max_chroma);
785 }
786 }
787 }
788
789 if (apply_y) {
790 for (int i = 0; i < (half_luma_height << 1); i++) {
791 for (int j = 0; j < (half_luma_width << 1); j++) {
792 luma[i * luma_stride + j] =
793 clamp(luma[i * luma_stride + j] +
794 ((scale_LUT(scaling_lut_y, luma[i * luma_stride + j],
795 bit_depth) *
796 luma_grain[i * luma_grain_stride + j] +
797 rounding_offset) >>
798 params->scaling_shift),
799 min_luma, max_luma);
800 }
801 }
802 }
803 }
804
copy_rect(uint8_t * src,int src_stride,uint8_t * dst,int dst_stride,int width,int height,int use_high_bit_depth)805 static void copy_rect(uint8_t *src, int src_stride, uint8_t *dst,
806 int dst_stride, int width, int height,
807 int use_high_bit_depth) {
808 int hbd_coeff = use_high_bit_depth ? 2 : 1;
809 while (height) {
810 memcpy(dst, src, width * sizeof(uint8_t) * hbd_coeff);
811 src += src_stride;
812 dst += dst_stride;
813 --height;
814 }
815 return;
816 }
817
copy_area(int * src,int src_stride,int * dst,int dst_stride,int width,int height)818 static void copy_area(int *src, int src_stride, int *dst, int dst_stride,
819 int width, int height) {
820 while (height) {
821 memcpy(dst, src, width * sizeof(*src));
822 src += src_stride;
823 dst += dst_stride;
824 --height;
825 }
826 return;
827 }
828
extend_even(uint8_t * dst,int dst_stride,int width,int height,int use_high_bit_depth)829 static void extend_even(uint8_t *dst, int dst_stride, int width, int height,
830 int use_high_bit_depth) {
831 if ((width & 1) == 0 && (height & 1) == 0) return;
832 if (use_high_bit_depth) {
833 uint16_t *dst16 = (uint16_t *)dst;
834 int dst16_stride = dst_stride / 2;
835 if (width & 1) {
836 for (int i = 0; i < height; ++i)
837 dst16[i * dst16_stride + width] = dst16[i * dst16_stride + width - 1];
838 }
839 width = (width + 1) & (~1);
840 if (height & 1) {
841 memcpy(&dst16[height * dst16_stride], &dst16[(height - 1) * dst16_stride],
842 sizeof(*dst16) * width);
843 }
844 } else {
845 if (width & 1) {
846 for (int i = 0; i < height; ++i)
847 dst[i * dst_stride + width] = dst[i * dst_stride + width - 1];
848 }
849 width = (width + 1) & (~1);
850 if (height & 1) {
851 memcpy(&dst[height * dst_stride], &dst[(height - 1) * dst_stride],
852 sizeof(*dst) * width);
853 }
854 }
855 }
856
ver_boundary_overlap(int * left_block,int left_stride,int * right_block,int right_stride,int * dst_block,int dst_stride,int width,int height)857 static void ver_boundary_overlap(int *left_block, int left_stride,
858 int *right_block, int right_stride,
859 int *dst_block, int dst_stride, int width,
860 int height) {
861 if (width == 1) {
862 while (height) {
863 *dst_block = clamp((*left_block * 23 + *right_block * 22 + 16) >> 5,
864 grain_min, grain_max);
865 left_block += left_stride;
866 right_block += right_stride;
867 dst_block += dst_stride;
868 --height;
869 }
870 return;
871 } else if (width == 2) {
872 while (height) {
873 dst_block[0] = clamp((27 * left_block[0] + 17 * right_block[0] + 16) >> 5,
874 grain_min, grain_max);
875 dst_block[1] = clamp((17 * left_block[1] + 27 * right_block[1] + 16) >> 5,
876 grain_min, grain_max);
877 left_block += left_stride;
878 right_block += right_stride;
879 dst_block += dst_stride;
880 --height;
881 }
882 return;
883 }
884 }
885
hor_boundary_overlap(int * top_block,int top_stride,int * bottom_block,int bottom_stride,int * dst_block,int dst_stride,int width,int height)886 static void hor_boundary_overlap(int *top_block, int top_stride,
887 int *bottom_block, int bottom_stride,
888 int *dst_block, int dst_stride, int width,
889 int height) {
890 if (height == 1) {
891 while (width) {
892 *dst_block = clamp((*top_block * 23 + *bottom_block * 22 + 16) >> 5,
893 grain_min, grain_max);
894 ++top_block;
895 ++bottom_block;
896 ++dst_block;
897 --width;
898 }
899 return;
900 } else if (height == 2) {
901 while (width) {
902 dst_block[0] = clamp((27 * top_block[0] + 17 * bottom_block[0] + 16) >> 5,
903 grain_min, grain_max);
904 dst_block[dst_stride] = clamp((17 * top_block[top_stride] +
905 27 * bottom_block[bottom_stride] + 16) >>
906 5,
907 grain_min, grain_max);
908 ++top_block;
909 ++bottom_block;
910 ++dst_block;
911 --width;
912 }
913 return;
914 }
915 }
916
av1_add_film_grain(const aom_film_grain_t * params,const aom_image_t * src,aom_image_t * dst)917 int av1_add_film_grain(const aom_film_grain_t *params, const aom_image_t *src,
918 aom_image_t *dst) {
919 uint8_t *luma, *cb, *cr;
920 int height, width, luma_stride, chroma_stride;
921 int use_high_bit_depth = 0;
922 int chroma_subsamp_x = 0;
923 int chroma_subsamp_y = 0;
924 int mc_identity = src->mc == AOM_CICP_MC_IDENTITY ? 1 : 0;
925
926 switch (src->fmt) {
927 case AOM_IMG_FMT_AOMI420:
928 case AOM_IMG_FMT_I420:
929 use_high_bit_depth = 0;
930 chroma_subsamp_x = 1;
931 chroma_subsamp_y = 1;
932 break;
933 case AOM_IMG_FMT_I42016:
934 use_high_bit_depth = 1;
935 chroma_subsamp_x = 1;
936 chroma_subsamp_y = 1;
937 break;
938 // case AOM_IMG_FMT_444A:
939 case AOM_IMG_FMT_I444:
940 use_high_bit_depth = 0;
941 chroma_subsamp_x = 0;
942 chroma_subsamp_y = 0;
943 break;
944 case AOM_IMG_FMT_I44416:
945 use_high_bit_depth = 1;
946 chroma_subsamp_x = 0;
947 chroma_subsamp_y = 0;
948 break;
949 case AOM_IMG_FMT_I422:
950 use_high_bit_depth = 0;
951 chroma_subsamp_x = 1;
952 chroma_subsamp_y = 0;
953 break;
954 case AOM_IMG_FMT_I42216:
955 use_high_bit_depth = 1;
956 chroma_subsamp_x = 1;
957 chroma_subsamp_y = 0;
958 break;
959 default: // unknown input format
960 fprintf(stderr, "Film grain error: input format is not supported!");
961 return -1;
962 }
963
964 assert(params->bit_depth == src->bit_depth);
965
966 dst->fmt = src->fmt;
967 dst->bit_depth = src->bit_depth;
968
969 dst->r_w = src->r_w;
970 dst->r_h = src->r_h;
971 dst->d_w = src->d_w;
972 dst->d_h = src->d_h;
973
974 dst->cp = src->cp;
975 dst->tc = src->tc;
976 dst->mc = src->mc;
977
978 dst->monochrome = src->monochrome;
979 dst->csp = src->csp;
980 dst->range = src->range;
981
982 dst->x_chroma_shift = src->x_chroma_shift;
983 dst->y_chroma_shift = src->y_chroma_shift;
984
985 dst->temporal_id = src->temporal_id;
986 dst->spatial_id = src->spatial_id;
987
988 width = src->d_w % 2 ? src->d_w + 1 : src->d_w;
989 height = src->d_h % 2 ? src->d_h + 1 : src->d_h;
990
991 copy_rect(src->planes[AOM_PLANE_Y], src->stride[AOM_PLANE_Y],
992 dst->planes[AOM_PLANE_Y], dst->stride[AOM_PLANE_Y], src->d_w,
993 src->d_h, use_high_bit_depth);
994 // Note that dst is already assumed to be aligned to even.
995 extend_even(dst->planes[AOM_PLANE_Y], dst->stride[AOM_PLANE_Y], src->d_w,
996 src->d_h, use_high_bit_depth);
997
998 if (!src->monochrome) {
999 copy_rect(src->planes[AOM_PLANE_U], src->stride[AOM_PLANE_U],
1000 dst->planes[AOM_PLANE_U], dst->stride[AOM_PLANE_U],
1001 width >> chroma_subsamp_x, height >> chroma_subsamp_y,
1002 use_high_bit_depth);
1003
1004 copy_rect(src->planes[AOM_PLANE_V], src->stride[AOM_PLANE_V],
1005 dst->planes[AOM_PLANE_V], dst->stride[AOM_PLANE_V],
1006 width >> chroma_subsamp_x, height >> chroma_subsamp_y,
1007 use_high_bit_depth);
1008 }
1009
1010 luma = dst->planes[AOM_PLANE_Y];
1011 cb = dst->planes[AOM_PLANE_U];
1012 cr = dst->planes[AOM_PLANE_V];
1013
1014 // luma and chroma strides in samples
1015 luma_stride = dst->stride[AOM_PLANE_Y] >> use_high_bit_depth;
1016 chroma_stride = dst->stride[AOM_PLANE_U] >> use_high_bit_depth;
1017
1018 return av1_add_film_grain_run(
1019 params, luma, cb, cr, height, width, luma_stride, chroma_stride,
1020 use_high_bit_depth, chroma_subsamp_y, chroma_subsamp_x, mc_identity);
1021 }
1022
av1_add_film_grain_run(const aom_film_grain_t * params,uint8_t * luma,uint8_t * cb,uint8_t * cr,int height,int width,int luma_stride,int chroma_stride,int use_high_bit_depth,int chroma_subsamp_y,int chroma_subsamp_x,int mc_identity)1023 int av1_add_film_grain_run(const aom_film_grain_t *params, uint8_t *luma,
1024 uint8_t *cb, uint8_t *cr, int height, int width,
1025 int luma_stride, int chroma_stride,
1026 int use_high_bit_depth, int chroma_subsamp_y,
1027 int chroma_subsamp_x, int mc_identity) {
1028 int **pred_pos_luma;
1029 int **pred_pos_chroma;
1030 int *luma_grain_block;
1031 int *cb_grain_block;
1032 int *cr_grain_block;
1033
1034 int *y_line_buf;
1035 int *cb_line_buf;
1036 int *cr_line_buf;
1037
1038 int *y_col_buf;
1039 int *cb_col_buf;
1040 int *cr_col_buf;
1041
1042 random_register = params->random_seed;
1043
1044 int left_pad = 3;
1045 int right_pad = 3; // padding to offset for AR coefficients
1046 int top_pad = 3;
1047 int bottom_pad = 0;
1048
1049 int ar_padding = 3; // maximum lag used for stabilization of AR coefficients
1050
1051 luma_subblock_size_y = 32;
1052 luma_subblock_size_x = 32;
1053
1054 chroma_subblock_size_y = luma_subblock_size_y >> chroma_subsamp_y;
1055 chroma_subblock_size_x = luma_subblock_size_x >> chroma_subsamp_x;
1056
1057 // Initial padding is only needed for generation of
1058 // film grain templates (to stabilize the AR process)
1059 // Only a 64x64 luma and 32x32 chroma part of a template
1060 // is used later for adding grain, padding can be discarded
1061
1062 int luma_block_size_y =
1063 top_pad + 2 * ar_padding + luma_subblock_size_y * 2 + bottom_pad;
1064 int luma_block_size_x = left_pad + 2 * ar_padding + luma_subblock_size_x * 2 +
1065 2 * ar_padding + right_pad;
1066
1067 int chroma_block_size_y = top_pad + (2 >> chroma_subsamp_y) * ar_padding +
1068 chroma_subblock_size_y * 2 + bottom_pad;
1069 int chroma_block_size_x = left_pad + (2 >> chroma_subsamp_x) * ar_padding +
1070 chroma_subblock_size_x * 2 +
1071 (2 >> chroma_subsamp_x) * ar_padding + right_pad;
1072
1073 int luma_grain_stride = luma_block_size_x;
1074 int chroma_grain_stride = chroma_block_size_x;
1075
1076 int overlap = params->overlap_flag;
1077 int bit_depth = params->bit_depth;
1078
1079 const int grain_center = 128 << (bit_depth - 8);
1080 grain_min = 0 - grain_center;
1081 grain_max = grain_center - 1;
1082
1083 init_arrays(params, luma_stride, chroma_stride, &pred_pos_luma,
1084 &pred_pos_chroma, &luma_grain_block, &cb_grain_block,
1085 &cr_grain_block, &y_line_buf, &cb_line_buf, &cr_line_buf,
1086 &y_col_buf, &cb_col_buf, &cr_col_buf,
1087 luma_block_size_y * luma_block_size_x,
1088 chroma_block_size_y * chroma_block_size_x, chroma_subsamp_y,
1089 chroma_subsamp_x);
1090
1091 if (generate_luma_grain_block(params, pred_pos_luma, luma_grain_block,
1092 luma_block_size_y, luma_block_size_x,
1093 luma_grain_stride, left_pad, top_pad, right_pad,
1094 bottom_pad))
1095 return -1;
1096
1097 if (generate_chroma_grain_blocks(
1098 params,
1099 // pred_pos_luma,
1100 pred_pos_chroma, luma_grain_block, cb_grain_block, cr_grain_block,
1101 luma_grain_stride, chroma_block_size_y, chroma_block_size_x,
1102 chroma_grain_stride, left_pad, top_pad, right_pad, bottom_pad,
1103 chroma_subsamp_y, chroma_subsamp_x))
1104 return -1;
1105
1106 init_scaling_function(params->scaling_points_y, params->num_y_points,
1107 scaling_lut_y);
1108
1109 if (params->chroma_scaling_from_luma) {
1110 memcpy(scaling_lut_cb, scaling_lut_y, sizeof(*scaling_lut_y) * 256);
1111 memcpy(scaling_lut_cr, scaling_lut_y, sizeof(*scaling_lut_y) * 256);
1112 } else {
1113 init_scaling_function(params->scaling_points_cb, params->num_cb_points,
1114 scaling_lut_cb);
1115 init_scaling_function(params->scaling_points_cr, params->num_cr_points,
1116 scaling_lut_cr);
1117 }
1118 for (int y = 0; y < height / 2; y += (luma_subblock_size_y >> 1)) {
1119 init_random_generator(y * 2, params->random_seed);
1120
1121 for (int x = 0; x < width / 2; x += (luma_subblock_size_x >> 1)) {
1122 int offset_y = get_random_number(8);
1123 int offset_x = (offset_y >> 4) & 15;
1124 offset_y &= 15;
1125
1126 int luma_offset_y = left_pad + 2 * ar_padding + (offset_y << 1);
1127 int luma_offset_x = top_pad + 2 * ar_padding + (offset_x << 1);
1128
1129 int chroma_offset_y = top_pad + (2 >> chroma_subsamp_y) * ar_padding +
1130 offset_y * (2 >> chroma_subsamp_y);
1131 int chroma_offset_x = left_pad + (2 >> chroma_subsamp_x) * ar_padding +
1132 offset_x * (2 >> chroma_subsamp_x);
1133
1134 if (overlap && x) {
1135 ver_boundary_overlap(
1136 y_col_buf, 2,
1137 luma_grain_block + luma_offset_y * luma_grain_stride +
1138 luma_offset_x,
1139 luma_grain_stride, y_col_buf, 2, 2,
1140 AOMMIN(luma_subblock_size_y + 2, height - (y << 1)));
1141
1142 ver_boundary_overlap(
1143 cb_col_buf, 2 >> chroma_subsamp_x,
1144 cb_grain_block + chroma_offset_y * chroma_grain_stride +
1145 chroma_offset_x,
1146 chroma_grain_stride, cb_col_buf, 2 >> chroma_subsamp_x,
1147 2 >> chroma_subsamp_x,
1148 AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
1149 (height - (y << 1)) >> chroma_subsamp_y));
1150
1151 ver_boundary_overlap(
1152 cr_col_buf, 2 >> chroma_subsamp_x,
1153 cr_grain_block + chroma_offset_y * chroma_grain_stride +
1154 chroma_offset_x,
1155 chroma_grain_stride, cr_col_buf, 2 >> chroma_subsamp_x,
1156 2 >> chroma_subsamp_x,
1157 AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
1158 (height - (y << 1)) >> chroma_subsamp_y));
1159
1160 int i = y ? 1 : 0;
1161
1162 if (use_high_bit_depth) {
1163 add_noise_to_block_hbd(
1164 params,
1165 (uint16_t *)luma + ((y + i) << 1) * luma_stride + (x << 1),
1166 (uint16_t *)cb +
1167 ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1168 (x << (1 - chroma_subsamp_x)),
1169 (uint16_t *)cr +
1170 ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1171 (x << (1 - chroma_subsamp_x)),
1172 luma_stride, chroma_stride, y_col_buf + i * 4,
1173 cb_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
1174 cr_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
1175 2, (2 - chroma_subsamp_x),
1176 AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i, 1,
1177 bit_depth, chroma_subsamp_y, chroma_subsamp_x, mc_identity);
1178 } else {
1179 add_noise_to_block(
1180 params, luma + ((y + i) << 1) * luma_stride + (x << 1),
1181 cb + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1182 (x << (1 - chroma_subsamp_x)),
1183 cr + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1184 (x << (1 - chroma_subsamp_x)),
1185 luma_stride, chroma_stride, y_col_buf + i * 4,
1186 cb_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
1187 cr_col_buf + i * (2 - chroma_subsamp_y) * (2 - chroma_subsamp_x),
1188 2, (2 - chroma_subsamp_x),
1189 AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i, 1,
1190 bit_depth, chroma_subsamp_y, chroma_subsamp_x, mc_identity);
1191 }
1192 }
1193
1194 if (overlap && y) {
1195 if (x) {
1196 hor_boundary_overlap(y_line_buf + (x << 1), luma_stride, y_col_buf, 2,
1197 y_line_buf + (x << 1), luma_stride, 2, 2);
1198
1199 hor_boundary_overlap(cb_line_buf + x * (2 >> chroma_subsamp_x),
1200 chroma_stride, cb_col_buf, 2 >> chroma_subsamp_x,
1201 cb_line_buf + x * (2 >> chroma_subsamp_x),
1202 chroma_stride, 2 >> chroma_subsamp_x,
1203 2 >> chroma_subsamp_y);
1204
1205 hor_boundary_overlap(cr_line_buf + x * (2 >> chroma_subsamp_x),
1206 chroma_stride, cr_col_buf, 2 >> chroma_subsamp_x,
1207 cr_line_buf + x * (2 >> chroma_subsamp_x),
1208 chroma_stride, 2 >> chroma_subsamp_x,
1209 2 >> chroma_subsamp_y);
1210 }
1211
1212 hor_boundary_overlap(
1213 y_line_buf + ((x ? x + 1 : 0) << 1), luma_stride,
1214 luma_grain_block + luma_offset_y * luma_grain_stride +
1215 luma_offset_x + (x ? 2 : 0),
1216 luma_grain_stride, y_line_buf + ((x ? x + 1 : 0) << 1), luma_stride,
1217 AOMMIN(luma_subblock_size_x - ((x ? 1 : 0) << 1),
1218 width - ((x ? x + 1 : 0) << 1)),
1219 2);
1220
1221 hor_boundary_overlap(
1222 cb_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
1223 chroma_stride,
1224 cb_grain_block + chroma_offset_y * chroma_grain_stride +
1225 chroma_offset_x + ((x ? 1 : 0) << (1 - chroma_subsamp_x)),
1226 chroma_grain_stride,
1227 cb_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
1228 chroma_stride,
1229 AOMMIN(chroma_subblock_size_x -
1230 ((x ? 1 : 0) << (1 - chroma_subsamp_x)),
1231 (width - ((x ? x + 1 : 0) << 1)) >> chroma_subsamp_x),
1232 2 >> chroma_subsamp_y);
1233
1234 hor_boundary_overlap(
1235 cr_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
1236 chroma_stride,
1237 cr_grain_block + chroma_offset_y * chroma_grain_stride +
1238 chroma_offset_x + ((x ? 1 : 0) << (1 - chroma_subsamp_x)),
1239 chroma_grain_stride,
1240 cr_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
1241 chroma_stride,
1242 AOMMIN(chroma_subblock_size_x -
1243 ((x ? 1 : 0) << (1 - chroma_subsamp_x)),
1244 (width - ((x ? x + 1 : 0) << 1)) >> chroma_subsamp_x),
1245 2 >> chroma_subsamp_y);
1246
1247 if (use_high_bit_depth) {
1248 add_noise_to_block_hbd(
1249 params, (uint16_t *)luma + (y << 1) * luma_stride + (x << 1),
1250 (uint16_t *)cb + (y << (1 - chroma_subsamp_y)) * chroma_stride +
1251 (x << ((1 - chroma_subsamp_x))),
1252 (uint16_t *)cr + (y << (1 - chroma_subsamp_y)) * chroma_stride +
1253 (x << ((1 - chroma_subsamp_x))),
1254 luma_stride, chroma_stride, y_line_buf + (x << 1),
1255 cb_line_buf + (x << (1 - chroma_subsamp_x)),
1256 cr_line_buf + (x << (1 - chroma_subsamp_x)), luma_stride,
1257 chroma_stride, 1,
1258 AOMMIN(luma_subblock_size_x >> 1, width / 2 - x), bit_depth,
1259 chroma_subsamp_y, chroma_subsamp_x, mc_identity);
1260 } else {
1261 add_noise_to_block(
1262 params, luma + (y << 1) * luma_stride + (x << 1),
1263 cb + (y << (1 - chroma_subsamp_y)) * chroma_stride +
1264 (x << ((1 - chroma_subsamp_x))),
1265 cr + (y << (1 - chroma_subsamp_y)) * chroma_stride +
1266 (x << ((1 - chroma_subsamp_x))),
1267 luma_stride, chroma_stride, y_line_buf + (x << 1),
1268 cb_line_buf + (x << (1 - chroma_subsamp_x)),
1269 cr_line_buf + (x << (1 - chroma_subsamp_x)), luma_stride,
1270 chroma_stride, 1,
1271 AOMMIN(luma_subblock_size_x >> 1, width / 2 - x), bit_depth,
1272 chroma_subsamp_y, chroma_subsamp_x, mc_identity);
1273 }
1274 }
1275
1276 int i = overlap && y ? 1 : 0;
1277 int j = overlap && x ? 1 : 0;
1278
1279 if (use_high_bit_depth) {
1280 add_noise_to_block_hbd(
1281 params,
1282 (uint16_t *)luma + ((y + i) << 1) * luma_stride + ((x + j) << 1),
1283 (uint16_t *)cb +
1284 ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1285 ((x + j) << (1 - chroma_subsamp_x)),
1286 (uint16_t *)cr +
1287 ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1288 ((x + j) << (1 - chroma_subsamp_x)),
1289 luma_stride, chroma_stride,
1290 luma_grain_block + (luma_offset_y + (i << 1)) * luma_grain_stride +
1291 luma_offset_x + (j << 1),
1292 cb_grain_block +
1293 (chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
1294 chroma_grain_stride +
1295 chroma_offset_x + (j << (1 - chroma_subsamp_x)),
1296 cr_grain_block +
1297 (chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
1298 chroma_grain_stride +
1299 chroma_offset_x + (j << (1 - chroma_subsamp_x)),
1300 luma_grain_stride, chroma_grain_stride,
1301 AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i,
1302 AOMMIN(luma_subblock_size_x >> 1, width / 2 - x) - j, bit_depth,
1303 chroma_subsamp_y, chroma_subsamp_x, mc_identity);
1304 } else {
1305 add_noise_to_block(
1306 params, luma + ((y + i) << 1) * luma_stride + ((x + j) << 1),
1307 cb + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1308 ((x + j) << (1 - chroma_subsamp_x)),
1309 cr + ((y + i) << (1 - chroma_subsamp_y)) * chroma_stride +
1310 ((x + j) << (1 - chroma_subsamp_x)),
1311 luma_stride, chroma_stride,
1312 luma_grain_block + (luma_offset_y + (i << 1)) * luma_grain_stride +
1313 luma_offset_x + (j << 1),
1314 cb_grain_block +
1315 (chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
1316 chroma_grain_stride +
1317 chroma_offset_x + (j << (1 - chroma_subsamp_x)),
1318 cr_grain_block +
1319 (chroma_offset_y + (i << (1 - chroma_subsamp_y))) *
1320 chroma_grain_stride +
1321 chroma_offset_x + (j << (1 - chroma_subsamp_x)),
1322 luma_grain_stride, chroma_grain_stride,
1323 AOMMIN(luma_subblock_size_y >> 1, height / 2 - y) - i,
1324 AOMMIN(luma_subblock_size_x >> 1, width / 2 - x) - j, bit_depth,
1325 chroma_subsamp_y, chroma_subsamp_x, mc_identity);
1326 }
1327
1328 if (overlap) {
1329 if (x) {
1330 // Copy overlapped column bufer to line buffer
1331 copy_area(y_col_buf + (luma_subblock_size_y << 1), 2,
1332 y_line_buf + (x << 1), luma_stride, 2, 2);
1333
1334 copy_area(
1335 cb_col_buf + (chroma_subblock_size_y << (1 - chroma_subsamp_x)),
1336 2 >> chroma_subsamp_x,
1337 cb_line_buf + (x << (1 - chroma_subsamp_x)), chroma_stride,
1338 2 >> chroma_subsamp_x, 2 >> chroma_subsamp_y);
1339
1340 copy_area(
1341 cr_col_buf + (chroma_subblock_size_y << (1 - chroma_subsamp_x)),
1342 2 >> chroma_subsamp_x,
1343 cr_line_buf + (x << (1 - chroma_subsamp_x)), chroma_stride,
1344 2 >> chroma_subsamp_x, 2 >> chroma_subsamp_y);
1345 }
1346
1347 // Copy grain to the line buffer for overlap with a bottom block
1348 copy_area(
1349 luma_grain_block +
1350 (luma_offset_y + luma_subblock_size_y) * luma_grain_stride +
1351 luma_offset_x + ((x ? 2 : 0)),
1352 luma_grain_stride, y_line_buf + ((x ? x + 1 : 0) << 1), luma_stride,
1353 AOMMIN(luma_subblock_size_x, width - (x << 1)) - (x ? 2 : 0), 2);
1354
1355 copy_area(cb_grain_block +
1356 (chroma_offset_y + chroma_subblock_size_y) *
1357 chroma_grain_stride +
1358 chroma_offset_x + (x ? 2 >> chroma_subsamp_x : 0),
1359 chroma_grain_stride,
1360 cb_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
1361 chroma_stride,
1362 AOMMIN(chroma_subblock_size_x,
1363 ((width - (x << 1)) >> chroma_subsamp_x)) -
1364 (x ? 2 >> chroma_subsamp_x : 0),
1365 2 >> chroma_subsamp_y);
1366
1367 copy_area(cr_grain_block +
1368 (chroma_offset_y + chroma_subblock_size_y) *
1369 chroma_grain_stride +
1370 chroma_offset_x + (x ? 2 >> chroma_subsamp_x : 0),
1371 chroma_grain_stride,
1372 cr_line_buf + ((x ? x + 1 : 0) << (1 - chroma_subsamp_x)),
1373 chroma_stride,
1374 AOMMIN(chroma_subblock_size_x,
1375 ((width - (x << 1)) >> chroma_subsamp_x)) -
1376 (x ? 2 >> chroma_subsamp_x : 0),
1377 2 >> chroma_subsamp_y);
1378
1379 // Copy grain to the column buffer for overlap with the next block to
1380 // the right
1381
1382 copy_area(luma_grain_block + luma_offset_y * luma_grain_stride +
1383 luma_offset_x + luma_subblock_size_x,
1384 luma_grain_stride, y_col_buf, 2, 2,
1385 AOMMIN(luma_subblock_size_y + 2, height - (y << 1)));
1386
1387 copy_area(cb_grain_block + chroma_offset_y * chroma_grain_stride +
1388 chroma_offset_x + chroma_subblock_size_x,
1389 chroma_grain_stride, cb_col_buf, 2 >> chroma_subsamp_x,
1390 2 >> chroma_subsamp_x,
1391 AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
1392 (height - (y << 1)) >> chroma_subsamp_y));
1393
1394 copy_area(cr_grain_block + chroma_offset_y * chroma_grain_stride +
1395 chroma_offset_x + chroma_subblock_size_x,
1396 chroma_grain_stride, cr_col_buf, 2 >> chroma_subsamp_x,
1397 2 >> chroma_subsamp_x,
1398 AOMMIN(chroma_subblock_size_y + (2 >> chroma_subsamp_y),
1399 (height - (y << 1)) >> chroma_subsamp_y));
1400 }
1401 }
1402 }
1403
1404 dealloc_arrays(params, &pred_pos_luma, &pred_pos_chroma, &luma_grain_block,
1405 &cb_grain_block, &cr_grain_block, &y_line_buf, &cb_line_buf,
1406 &cr_line_buf, &y_col_buf, &cb_col_buf, &cr_col_buf);
1407 return 0;
1408 }
1409