1 /* 2 * Copyright (c) 2014 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 */ 10 11 #include <assert.h> 12 #include <limits.h> 13 #include <math.h> 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <string.h> 17 18 #include "vp9/common/vp9_common.h" 19 #include "vp9/encoder/vp9_resize.h" 20 21 #define FILTER_BITS 7 22 23 #define INTERP_TAPS 8 24 #define SUBPEL_BITS 5 25 #define SUBPEL_MASK ((1 << SUBPEL_BITS) - 1) 26 #define INTERP_PRECISION_BITS 32 27 28 typedef int16_t interp_kernel[INTERP_TAPS]; 29 30 // Filters for interpolation (0.5-band) - note this also filters integer pels. 31 const interp_kernel vp9_filteredinterp_filters500[(1 << SUBPEL_BITS)] = { 32 {-3, 0, 35, 64, 35, 0, -3, 0}, 33 {-3, -1, 34, 64, 36, 1, -3, 0}, 34 {-3, -1, 32, 64, 38, 1, -3, 0}, 35 {-2, -2, 31, 63, 39, 2, -3, 0}, 36 {-2, -2, 29, 63, 41, 2, -3, 0}, 37 {-2, -2, 28, 63, 42, 3, -4, 0}, 38 {-2, -3, 27, 63, 43, 4, -4, 0}, 39 {-2, -3, 25, 62, 45, 5, -4, 0}, 40 {-2, -3, 24, 62, 46, 5, -4, 0}, 41 {-2, -3, 23, 61, 47, 6, -4, 0}, 42 {-2, -3, 21, 60, 49, 7, -4, 0}, 43 {-1, -4, 20, 60, 50, 8, -4, -1}, 44 {-1, -4, 19, 59, 51, 9, -4, -1}, 45 {-1, -4, 17, 58, 52, 10, -4, 0}, 46 {-1, -4, 16, 57, 53, 12, -4, -1}, 47 {-1, -4, 15, 56, 54, 13, -4, -1}, 48 {-1, -4, 14, 55, 55, 14, -4, -1}, 49 {-1, -4, 13, 54, 56, 15, -4, -1}, 50 {-1, -4, 12, 53, 57, 16, -4, -1}, 51 {0, -4, 10, 52, 58, 17, -4, -1}, 52 {-1, -4, 9, 51, 59, 19, -4, -1}, 53 {-1, -4, 8, 50, 60, 20, -4, -1}, 54 {0, -4, 7, 49, 60, 21, -3, -2}, 55 {0, -4, 6, 47, 61, 23, -3, -2}, 56 {0, -4, 5, 46, 62, 24, -3, -2}, 57 {0, -4, 5, 45, 62, 25, -3, -2}, 58 {0, -4, 4, 43, 63, 27, -3, -2}, 59 {0, -4, 3, 42, 63, 28, -2, -2}, 60 {0, -3, 2, 41, 63, 29, -2, -2}, 61 {0, -3, 2, 39, 63, 31, -2, -2}, 62 {0, -3, 1, 38, 64, 32, -1, -3}, 63 {0, -3, 1, 36, 64, 34, -1, -3} 64 }; 65 66 // Filters for interpolation (0.625-band) - note this also filters integer pels. 67 const interp_kernel vp9_filteredinterp_filters625[(1 << SUBPEL_BITS)] = { 68 {-1, -8, 33, 80, 33, -8, -1, 0}, 69 {-1, -8, 30, 80, 35, -8, -1, 1}, 70 {-1, -8, 28, 80, 37, -7, -2, 1}, 71 {0, -8, 26, 79, 39, -7, -2, 1}, 72 {0, -8, 24, 79, 41, -7, -2, 1}, 73 {0, -8, 22, 78, 43, -6, -2, 1}, 74 {0, -8, 20, 78, 45, -5, -3, 1}, 75 {0, -8, 18, 77, 48, -5, -3, 1}, 76 {0, -8, 16, 76, 50, -4, -3, 1}, 77 {0, -8, 15, 75, 52, -3, -4, 1}, 78 {0, -7, 13, 74, 54, -3, -4, 1}, 79 {0, -7, 11, 73, 56, -2, -4, 1}, 80 {0, -7, 10, 71, 58, -1, -4, 1}, 81 {1, -7, 8, 70, 60, 0, -5, 1}, 82 {1, -6, 6, 68, 62, 1, -5, 1}, 83 {1, -6, 5, 67, 63, 2, -5, 1}, 84 {1, -6, 4, 65, 65, 4, -6, 1}, 85 {1, -5, 2, 63, 67, 5, -6, 1}, 86 {1, -5, 1, 62, 68, 6, -6, 1}, 87 {1, -5, 0, 60, 70, 8, -7, 1}, 88 {1, -4, -1, 58, 71, 10, -7, 0}, 89 {1, -4, -2, 56, 73, 11, -7, 0}, 90 {1, -4, -3, 54, 74, 13, -7, 0}, 91 {1, -4, -3, 52, 75, 15, -8, 0}, 92 {1, -3, -4, 50, 76, 16, -8, 0}, 93 {1, -3, -5, 48, 77, 18, -8, 0}, 94 {1, -3, -5, 45, 78, 20, -8, 0}, 95 {1, -2, -6, 43, 78, 22, -8, 0}, 96 {1, -2, -7, 41, 79, 24, -8, 0}, 97 {1, -2, -7, 39, 79, 26, -8, 0}, 98 {1, -2, -7, 37, 80, 28, -8, -1}, 99 {1, -1, -8, 35, 80, 30, -8, -1}, 100 }; 101 102 // Filters for interpolation (0.75-band) - note this also filters integer pels. 103 const interp_kernel vp9_filteredinterp_filters750[(1 << SUBPEL_BITS)] = { 104 {2, -11, 25, 96, 25, -11, 2, 0}, 105 {2, -11, 22, 96, 28, -11, 2, 0}, 106 {2, -10, 19, 95, 31, -11, 2, 0}, 107 {2, -10, 17, 95, 34, -12, 2, 0}, 108 {2, -9, 14, 94, 37, -12, 2, 0}, 109 {2, -8, 12, 93, 40, -12, 1, 0}, 110 {2, -8, 9, 92, 43, -12, 1, 1}, 111 {2, -7, 7, 91, 46, -12, 1, 0}, 112 {2, -7, 5, 90, 49, -12, 1, 0}, 113 {2, -6, 3, 88, 52, -12, 0, 1}, 114 {2, -5, 1, 86, 55, -12, 0, 1}, 115 {2, -5, -1, 84, 58, -11, 0, 1}, 116 {2, -4, -2, 82, 61, -11, -1, 1}, 117 {2, -4, -4, 80, 64, -10, -1, 1}, 118 {1, -3, -5, 77, 67, -9, -1, 1}, 119 {1, -3, -6, 75, 70, -8, -2, 1}, 120 {1, -2, -7, 72, 72, -7, -2, 1}, 121 {1, -2, -8, 70, 75, -6, -3, 1}, 122 {1, -1, -9, 67, 77, -5, -3, 1}, 123 {1, -1, -10, 64, 80, -4, -4, 2}, 124 {1, -1, -11, 61, 82, -2, -4, 2}, 125 {1, 0, -11, 58, 84, -1, -5, 2}, 126 {1, 0, -12, 55, 86, 1, -5, 2}, 127 {1, 0, -12, 52, 88, 3, -6, 2}, 128 {0, 1, -12, 49, 90, 5, -7, 2}, 129 {0, 1, -12, 46, 91, 7, -7, 2}, 130 {1, 1, -12, 43, 92, 9, -8, 2}, 131 {0, 1, -12, 40, 93, 12, -8, 2}, 132 {0, 2, -12, 37, 94, 14, -9, 2}, 133 {0, 2, -12, 34, 95, 17, -10, 2}, 134 {0, 2, -11, 31, 95, 19, -10, 2}, 135 {0, 2, -11, 28, 96, 22, -11, 2} 136 }; 137 138 // Filters for interpolation (0.875-band) - note this also filters integer pels. 139 const interp_kernel vp9_filteredinterp_filters875[(1 << SUBPEL_BITS)] = { 140 {3, -8, 13, 112, 13, -8, 3, 0}, 141 {3, -7, 10, 112, 17, -9, 3, -1}, 142 {2, -6, 7, 111, 21, -9, 3, -1}, 143 {2, -5, 4, 111, 24, -10, 3, -1}, 144 {2, -4, 1, 110, 28, -11, 3, -1}, 145 {1, -3, -1, 108, 32, -12, 4, -1}, 146 {1, -2, -3, 106, 36, -13, 4, -1}, 147 {1, -1, -6, 105, 40, -14, 4, -1}, 148 {1, -1, -7, 102, 44, -14, 4, -1}, 149 {1, 0, -9, 100, 48, -15, 4, -1}, 150 {1, 1, -11, 97, 53, -16, 4, -1}, 151 {0, 1, -12, 95, 57, -16, 4, -1}, 152 {0, 2, -13, 91, 61, -16, 4, -1}, 153 {0, 2, -14, 88, 65, -16, 4, -1}, 154 {0, 3, -15, 84, 69, -17, 4, 0}, 155 {0, 3, -16, 81, 73, -16, 3, 0}, 156 {0, 3, -16, 77, 77, -16, 3, 0}, 157 {0, 3, -16, 73, 81, -16, 3, 0}, 158 {0, 4, -17, 69, 84, -15, 3, 0}, 159 {-1, 4, -16, 65, 88, -14, 2, 0}, 160 {-1, 4, -16, 61, 91, -13, 2, 0}, 161 {-1, 4, -16, 57, 95, -12, 1, 0}, 162 {-1, 4, -16, 53, 97, -11, 1, 1}, 163 {-1, 4, -15, 48, 100, -9, 0, 1}, 164 {-1, 4, -14, 44, 102, -7, -1, 1}, 165 {-1, 4, -14, 40, 105, -6, -1, 1}, 166 {-1, 4, -13, 36, 106, -3, -2, 1}, 167 {-1, 4, -12, 32, 108, -1, -3, 1}, 168 {-1, 3, -11, 28, 110, 1, -4, 2}, 169 {-1, 3, -10, 24, 111, 4, -5, 2}, 170 {-1, 3, -9, 21, 111, 7, -6, 2}, 171 {-1, 3, -9, 17, 112, 10, -7, 3} 172 }; 173 174 // Filters for interpolation (full-band) - no filtering for integer pixels 175 const interp_kernel vp9_filteredinterp_filters1000[(1 << SUBPEL_BITS)] = { 176 {0, 0, 0, 128, 0, 0, 0, 0}, 177 {0, 1, -3, 128, 3, -1, 0, 0}, 178 {-1, 2, -6, 127, 7, -2, 1, 0}, 179 {-1, 3, -9, 126, 12, -4, 1, 0}, 180 {-1, 4, -12, 125, 16, -5, 1, 0}, 181 {-1, 4, -14, 123, 20, -6, 2, 0}, 182 {-1, 5, -15, 120, 25, -8, 2, 0}, 183 {-1, 5, -17, 118, 30, -9, 3, -1}, 184 {-1, 6, -18, 114, 35, -10, 3, -1}, 185 {-1, 6, -19, 111, 41, -12, 3, -1}, 186 {-1, 6, -20, 107, 46, -13, 4, -1}, 187 {-1, 6, -21, 103, 52, -14, 4, -1}, 188 {-1, 6, -21, 99, 57, -16, 5, -1}, 189 {-1, 6, -21, 94, 63, -17, 5, -1}, 190 {-1, 6, -20, 89, 68, -18, 5, -1}, 191 {-1, 6, -20, 84, 73, -19, 6, -1}, 192 {-1, 6, -20, 79, 79, -20, 6, -1}, 193 {-1, 6, -19, 73, 84, -20, 6, -1}, 194 {-1, 5, -18, 68, 89, -20, 6, -1}, 195 {-1, 5, -17, 63, 94, -21, 6, -1}, 196 {-1, 5, -16, 57, 99, -21, 6, -1}, 197 {-1, 4, -14, 52, 103, -21, 6, -1}, 198 {-1, 4, -13, 46, 107, -20, 6, -1}, 199 {-1, 3, -12, 41, 111, -19, 6, -1}, 200 {-1, 3, -10, 35, 114, -18, 6, -1}, 201 {-1, 3, -9, 30, 118, -17, 5, -1}, 202 {0, 2, -8, 25, 120, -15, 5, -1}, 203 {0, 2, -6, 20, 123, -14, 4, -1}, 204 {0, 1, -5, 16, 125, -12, 4, -1}, 205 {0, 1, -4, 12, 126, -9, 3, -1}, 206 {0, 1, -2, 7, 127, -6, 2, -1}, 207 {0, 0, -1, 3, 128, -3, 1, 0} 208 }; 209 210 // Filters for factor of 2 downsampling. 211 static const int16_t vp9_down2_symeven_half_filter[] = {56, 12, -3, -1}; 212 static const int16_t vp9_down2_symodd_half_filter[] = {64, 35, 0, -3}; 213 214 static const interp_kernel *choose_interp_filter(int inlength, int outlength) { 215 int outlength16 = outlength * 16; 216 if (outlength16 >= inlength * 16) 217 return vp9_filteredinterp_filters1000; 218 else if (outlength16 >= inlength * 13) 219 return vp9_filteredinterp_filters875; 220 else if (outlength16 >= inlength * 11) 221 return vp9_filteredinterp_filters750; 222 else if (outlength16 >= inlength * 9) 223 return vp9_filteredinterp_filters625; 224 else 225 return vp9_filteredinterp_filters500; 226 } 227 228 static void interpolate(const uint8_t *const input, int inlength, 229 uint8_t *output, int outlength) { 230 const int64_t delta = (((uint64_t)inlength << 32) + outlength / 2) / 231 outlength; 232 const int64_t offset = inlength > outlength ? 233 (((int64_t)(inlength - outlength) << 31) + outlength / 2) / outlength : 234 -(((int64_t)(outlength - inlength) << 31) + outlength / 2) / outlength; 235 uint8_t *optr = output; 236 int x, x1, x2, sum, k, int_pel, sub_pel; 237 int64_t y; 238 239 const interp_kernel *interp_filters = 240 choose_interp_filter(inlength, outlength); 241 242 x = 0; 243 y = offset; 244 while ((y >> INTERP_PRECISION_BITS) < (INTERP_TAPS / 2 - 1)) { 245 x++; 246 y += delta; 247 } 248 x1 = x; 249 x = outlength - 1; 250 y = delta * x + offset; 251 while ((y >> INTERP_PRECISION_BITS) + 252 (int64_t)(INTERP_TAPS / 2) >= inlength) { 253 x--; 254 y -= delta; 255 } 256 x2 = x; 257 if (x1 > x2) { 258 for (x = 0, y = offset; x < outlength; ++x, y += delta) { 259 const int16_t *filter; 260 int_pel = y >> INTERP_PRECISION_BITS; 261 sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; 262 filter = interp_filters[sub_pel]; 263 sum = 0; 264 for (k = 0; k < INTERP_TAPS; ++k) { 265 const int pk = int_pel - INTERP_TAPS / 2 + 1 + k; 266 sum += filter[k] * input[(pk < 0 ? 0 : 267 (pk >= inlength ? inlength - 1 : pk))]; 268 } 269 *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); 270 } 271 } else { 272 // Initial part. 273 for (x = 0, y = offset; x < x1; ++x, y += delta) { 274 const int16_t *filter; 275 int_pel = y >> INTERP_PRECISION_BITS; 276 sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; 277 filter = interp_filters[sub_pel]; 278 sum = 0; 279 for (k = 0; k < INTERP_TAPS; ++k) 280 sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k < 0 ? 281 0 : 282 int_pel - INTERP_TAPS / 2 + 1 + k)]; 283 *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); 284 } 285 // Middle part. 286 for (; x <= x2; ++x, y += delta) { 287 const int16_t *filter; 288 int_pel = y >> INTERP_PRECISION_BITS; 289 sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; 290 filter = interp_filters[sub_pel]; 291 sum = 0; 292 for (k = 0; k < INTERP_TAPS; ++k) 293 sum += filter[k] * input[int_pel - INTERP_TAPS / 2 + 1 + k]; 294 *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); 295 } 296 // End part. 297 for (; x < outlength; ++x, y += delta) { 298 const int16_t *filter; 299 int_pel = y >> INTERP_PRECISION_BITS; 300 sub_pel = (y >> (INTERP_PRECISION_BITS - SUBPEL_BITS)) & SUBPEL_MASK; 301 filter = interp_filters[sub_pel]; 302 sum = 0; 303 for (k = 0; k < INTERP_TAPS; ++k) 304 sum += filter[k] * input[(int_pel - INTERP_TAPS / 2 + 1 + k >= 305 inlength ? inlength - 1 : 306 int_pel - INTERP_TAPS / 2 + 1 + k)]; 307 *optr++ = clip_pixel(ROUND_POWER_OF_TWO(sum, FILTER_BITS)); 308 } 309 } 310 } 311 312 static void down2_symeven(const uint8_t *const input, int length, 313 uint8_t *output) { 314 // Actual filter len = 2 * filter_len_half. 315 static const int16_t *filter = vp9_down2_symeven_half_filter; 316 const int filter_len_half = sizeof(vp9_down2_symeven_half_filter) / 2; 317 int i, j; 318 uint8_t *optr = output; 319 int l1 = filter_len_half; 320 int l2 = (length - filter_len_half); 321 l1 += (l1 & 1); 322 l2 += (l2 & 1); 323 if (l1 > l2) { 324 // Short input length. 325 for (i = 0; i < length; i += 2) { 326 int sum = (1 << (FILTER_BITS - 1)); 327 for (j = 0; j < filter_len_half; ++j) { 328 sum += (input[(i - j < 0 ? 0 : i - j)] + 329 input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) * 330 filter[j]; 331 } 332 sum >>= FILTER_BITS; 333 *optr++ = clip_pixel(sum); 334 } 335 } else { 336 // Initial part. 337 for (i = 0; i < l1; i += 2) { 338 int sum = (1 << (FILTER_BITS - 1)); 339 for (j = 0; j < filter_len_half; ++j) { 340 sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + 1 + j]) * filter[j]; 341 } 342 sum >>= FILTER_BITS; 343 *optr++ = clip_pixel(sum); 344 } 345 // Middle part. 346 for (; i < l2; i += 2) { 347 int sum = (1 << (FILTER_BITS - 1)); 348 for (j = 0; j < filter_len_half; ++j) { 349 sum += (input[i - j] + input[i + 1 + j]) * filter[j]; 350 } 351 sum >>= FILTER_BITS; 352 *optr++ = clip_pixel(sum); 353 } 354 // End part. 355 for (; i < length; i += 2) { 356 int sum = (1 << (FILTER_BITS - 1)); 357 for (j = 0; j < filter_len_half; ++j) { 358 sum += (input[i - j] + 359 input[(i + 1 + j >= length ? length - 1 : i + 1 + j)]) * 360 filter[j]; 361 } 362 sum >>= FILTER_BITS; 363 *optr++ = clip_pixel(sum); 364 } 365 } 366 } 367 368 static void down2_symodd(const uint8_t *const input, int length, 369 uint8_t *output) { 370 // Actual filter len = 2 * filter_len_half - 1. 371 static const int16_t *filter = vp9_down2_symodd_half_filter; 372 const int filter_len_half = sizeof(vp9_down2_symodd_half_filter) / 2; 373 int i, j; 374 uint8_t *optr = output; 375 int l1 = filter_len_half - 1; 376 int l2 = (length - filter_len_half + 1); 377 l1 += (l1 & 1); 378 l2 += (l2 & 1); 379 if (l1 > l2) { 380 // Short input length. 381 for (i = 0; i < length; i += 2) { 382 int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; 383 for (j = 1; j < filter_len_half; ++j) { 384 sum += (input[(i - j < 0 ? 0 : i - j)] + 385 input[(i + j >= length ? length - 1 : i + j)]) * 386 filter[j]; 387 } 388 sum >>= FILTER_BITS; 389 *optr++ = clip_pixel(sum); 390 } 391 } else { 392 // Initial part. 393 for (i = 0; i < l1; i += 2) { 394 int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; 395 for (j = 1; j < filter_len_half; ++j) { 396 sum += (input[(i - j < 0 ? 0 : i - j)] + input[i + j]) * filter[j]; 397 } 398 sum >>= FILTER_BITS; 399 *optr++ = clip_pixel(sum); 400 } 401 // Middle part. 402 for (; i < l2; i += 2) { 403 int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; 404 for (j = 1; j < filter_len_half; ++j) { 405 sum += (input[i - j] + input[i + j]) * filter[j]; 406 } 407 sum >>= FILTER_BITS; 408 *optr++ = clip_pixel(sum); 409 } 410 // End part. 411 for (; i < length; i += 2) { 412 int sum = (1 << (FILTER_BITS - 1)) + input[i] * filter[0]; 413 for (j = 1; j < filter_len_half; ++j) { 414 sum += (input[i - j] + input[(i + j >= length ? length - 1 : i + j)]) * 415 filter[j]; 416 } 417 sum >>= FILTER_BITS; 418 *optr++ = clip_pixel(sum); 419 } 420 } 421 } 422 423 static int get_down2_length(int length, int steps) { 424 int s; 425 for (s = 0; s < steps; ++s) 426 length = (length + 1) >> 1; 427 return length; 428 } 429 430 int get_down2_steps(int in_length, int out_length) { 431 int steps = 0; 432 int proj_in_length; 433 while ((proj_in_length = get_down2_length(in_length, 1)) >= out_length) { 434 ++steps; 435 in_length = proj_in_length; 436 } 437 return steps; 438 } 439 440 static void resize_multistep(const uint8_t *const input, 441 int length, 442 uint8_t *output, 443 int olength, 444 uint8_t *buf) { 445 int steps; 446 if (length == olength) { 447 memcpy(output, input, sizeof(uint8_t) * length); 448 return; 449 } 450 steps = get_down2_steps(length, olength); 451 452 if (steps > 0) { 453 int s; 454 uint8_t *out = NULL; 455 uint8_t *tmpbuf = NULL; 456 uint8_t *otmp, *otmp2; 457 int filteredlength = length; 458 if (!tmpbuf) { 459 tmpbuf = (uint8_t *)malloc(sizeof(uint8_t) * length); 460 otmp = tmpbuf; 461 } else { 462 otmp = buf; 463 } 464 otmp2 = otmp + get_down2_length(length, 1); 465 for (s = 0; s < steps; ++s) { 466 const int proj_filteredlength = get_down2_length(filteredlength, 1); 467 const uint8_t *const in = (s == 0 ? input : out); 468 if (s == steps - 1 && proj_filteredlength == olength) 469 out = output; 470 else 471 out = (s & 1 ? otmp2 : otmp); 472 if (filteredlength & 1) 473 down2_symodd(in, filteredlength, out); 474 else 475 down2_symeven(in, filteredlength, out); 476 filteredlength = proj_filteredlength; 477 } 478 if (filteredlength != olength) { 479 interpolate(out, filteredlength, output, olength); 480 } 481 if (tmpbuf) 482 free(tmpbuf); 483 } else { 484 interpolate(input, length, output, olength); 485 } 486 } 487 488 static void fill_col_to_arr(uint8_t *img, int stride, int len, uint8_t *arr) { 489 int i; 490 uint8_t *iptr = img; 491 uint8_t *aptr = arr; 492 for (i = 0; i < len; ++i, iptr += stride) { 493 *aptr++ = *iptr; 494 } 495 } 496 497 static void fill_arr_to_col(uint8_t *img, int stride, int len, uint8_t *arr) { 498 int i; 499 uint8_t *iptr = img; 500 uint8_t *aptr = arr; 501 for (i = 0; i < len; ++i, iptr += stride) { 502 *iptr = *aptr++; 503 } 504 } 505 506 void vp9_resize_plane(const uint8_t *const input, 507 int height, 508 int width, 509 int in_stride, 510 uint8_t *output, 511 int height2, 512 int width2, 513 int out_stride) { 514 int i; 515 uint8_t *intbuf = (uint8_t *)malloc(sizeof(uint8_t) * width2 * height); 516 uint8_t *tmpbuf = (uint8_t *)malloc(sizeof(uint8_t) * 517 (width < height ? height : width)); 518 uint8_t *arrbuf = (uint8_t *)malloc(sizeof(uint8_t) * (height + height2)); 519 for (i = 0; i < height; ++i) 520 resize_multistep(input + in_stride * i, width, 521 intbuf + width2 * i, width2, tmpbuf); 522 for (i = 0; i < width2; ++i) { 523 fill_col_to_arr(intbuf + i, width2, height, arrbuf); 524 resize_multistep(arrbuf, height, arrbuf + height, height2, tmpbuf); 525 fill_arr_to_col(output + i, out_stride, height2, arrbuf + height); 526 } 527 free(intbuf); 528 free(tmpbuf); 529 free(arrbuf); 530 } 531 532 void vp9_resize_frame420(const uint8_t *const y, 533 int y_stride, 534 const uint8_t *const u, const uint8_t *const v, 535 int uv_stride, 536 int height, int width, 537 uint8_t *oy, int oy_stride, 538 uint8_t *ou, uint8_t *ov, int ouv_stride, 539 int oheight, int owidth) { 540 vp9_resize_plane(y, height, width, y_stride, 541 oy, oheight, owidth, oy_stride); 542 vp9_resize_plane(u, height / 2, width / 2, uv_stride, 543 ou, oheight / 2, owidth / 2, ouv_stride); 544 vp9_resize_plane(v, height / 2, width / 2, uv_stride, 545 ov, oheight / 2, owidth / 2, ouv_stride); 546 } 547 548 void vp9_resize_frame422(const uint8_t *const y, int y_stride, 549 const uint8_t *const u, const uint8_t *const v, 550 int uv_stride, 551 int height, int width, 552 uint8_t *oy, int oy_stride, 553 uint8_t *ou, uint8_t *ov, int ouv_stride, 554 int oheight, int owidth) { 555 vp9_resize_plane(y, height, width, y_stride, 556 oy, oheight, owidth, oy_stride); 557 vp9_resize_plane(u, height, width / 2, uv_stride, 558 ou, oheight, owidth / 2, ouv_stride); 559 vp9_resize_plane(v, height, width / 2, uv_stride, 560 ov, oheight, owidth / 2, ouv_stride); 561 } 562 563 void vp9_resize_frame444(const uint8_t *const y, int y_stride, 564 const uint8_t *const u, const uint8_t *const v, 565 int uv_stride, 566 int height, int width, 567 uint8_t *oy, int oy_stride, 568 uint8_t *ou, uint8_t *ov, int ouv_stride, 569 int oheight, int owidth) { 570 vp9_resize_plane(y, height, width, y_stride, 571 oy, oheight, owidth, oy_stride); 572 vp9_resize_plane(u, height, width, uv_stride, 573 ou, oheight, owidth, ouv_stride); 574 vp9_resize_plane(v, height, width, uv_stride, 575 ov, oheight, owidth, ouv_stride); 576 } 577
