| OLD | NEW |
|---|
| 1 /* | 1 /* |
| 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. | 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
| 11 | 11 |
| 12 #include "vpx_scale/vpxscale.h" | 12 #include "vpx_scale/vpxscale.h" |
| 13 #include "vpx_mem/vpx_mem.h" | 13 #include "vpx_mem/vpx_mem.h" |
| 14 /**************************************************************************** | 14 /**************************************************************************** |
| 15 * Imports | 15 * Imports |
| 16 ****************************************************************************/ | 16 ****************************************************************************/ |
| 17 | 17 |
| 18 /**************************************************************************** | 18 /**************************************************************************** |
| 19 * | 19 * |
| 20 * ROUTINE : vp8_horizontal_line_4_5_scale_c | |
| 21 * | 20 * |
| 22 * INPUTS : const unsigned char *source : Pointer to source data. | 21 * INPUTS : const unsigned char *source : Pointer to source data. |
| 23 * unsigned int source_width : Stride of source. | 22 * unsigned int source_width : Stride of source. |
| 24 * unsigned char *dest : Pointer to destination data. | 23 * unsigned char *dest : Pointer to destination data. |
| 25 * unsigned int dest_width : Stride of destination (NOT US
ED). | 24 * unsigned int dest_width : Stride of destination (NOT US
ED). |
| 26 * | 25 * |
| 27 * OUTPUTS : None. | 26 * OUTPUTS : None. |
| 28 * | 27 * |
| 29 * RETURNS : void | 28 * RETURNS : void |
| 30 * | 29 * |
| 31 * FUNCTION : Copies horizontal line of pixels from source to | 30 * FUNCTION : Copies horizontal line of pixels from source to |
| 32 * destination scaling up by 4 to 5. | 31 * destination scaling up by 4 to 5. |
| 33 * | 32 * |
| 34 * SPECIAL NOTES : None. | 33 * SPECIAL NOTES : None. |
| 35 * | 34 * |
| 36 ****************************************************************************/ | 35 ****************************************************************************/ |
| 37 void vp8_horizontal_line_4_5_scale_c(const unsigned char *source, | |
| 38 unsigned int source_width, | |
| 39 unsigned char *dest, | |
| 40 unsigned int dest_width) { | |
| 41 unsigned i; | |
| 42 unsigned int a, b, c; | |
| 43 unsigned char *des = dest; | |
| 44 const unsigned char *src = source; | |
| 45 | |
| 46 (void) dest_width; | |
| 47 | |
| 48 for (i = 0; i < source_width - 4; i += 4) { | |
| 49 a = src[0]; | |
| 50 b = src[1]; | |
| 51 des [0] = (unsigned char) a; | |
| 52 des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8); | |
| 53 c = src[2] * 154; | |
| 54 a = src[3]; | |
| 55 des [2] = (unsigned char)((b * 102 + c + 128) >> 8); | |
| 56 des [3] = (unsigned char)((c + 102 * a + 128) >> 8); | |
| 57 b = src[4]; | |
| 58 des [4] = (unsigned char)((a * 205 + 51 * b + 128) >> 8); | |
| 59 | |
| 60 src += 4; | |
| 61 des += 5; | |
| 62 } | |
| 63 | |
| 64 a = src[0]; | |
| 65 b = src[1]; | |
| 66 des [0] = (unsigned char)(a); | |
| 67 des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8); | |
| 68 c = src[2] * 154; | |
| 69 a = src[3]; | |
| 70 des [2] = (unsigned char)((b * 102 + c + 128) >> 8); | |
| 71 des [3] = (unsigned char)((c + 102 * a + 128) >> 8); | |
| 72 des [4] = (unsigned char)(a); | |
| 73 | |
| 74 } | |
| 75 | |
| 76 /**************************************************************************** | |
| 77 * | |
| 78 * ROUTINE : vp8_vertical_band_4_5_scale_c | |
| 79 * | |
| 80 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 81 * unsigned int dest_pitch : Stride of destination data. | |
| 82 * unsigned int dest_width : Width of destination data. | |
| 83 * | |
| 84 * OUTPUTS : None. | |
| 85 * | |
| 86 * RETURNS : void | |
| 87 * | |
| 88 * FUNCTION : Scales vertical band of pixels by scale 4 to 5. The | |
| 89 * height of the band scaled is 4-pixels. | |
| 90 * | |
| 91 * SPECIAL NOTES : The routine uses the first line of the band below | |
| 92 * the current band. | |
| 93 * | |
| 94 ****************************************************************************/ | |
| 95 void vp8_vertical_band_4_5_scale_c(unsigned char *dest, | |
| 96 unsigned int dest_pitch, | |
| 97 unsigned int dest_width) { | |
| 98 unsigned int i; | |
| 99 unsigned int a, b, c, d; | |
| 100 unsigned char *des = dest; | |
| 101 | |
| 102 for (i = 0; i < dest_width; i++) { | |
| 103 a = des [0]; | |
| 104 b = des [dest_pitch]; | |
| 105 | |
| 106 des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8); | |
| 107 | |
| 108 c = des[dest_pitch * 2] * 154; | |
| 109 d = des[dest_pitch * 3]; | |
| 110 | |
| 111 des [dest_pitch * 2] = (unsigned char)((b * 102 + c + 128) >> 8); | |
| 112 des [dest_pitch * 3] = (unsigned char)((c + 102 * d + 128) >> 8); | |
| 113 | |
| 114 /* First line in next band */ | |
| 115 a = des [dest_pitch * 5]; | |
| 116 des [dest_pitch * 4] = (unsigned char)((d * 205 + 51 * a + 128) >> 8); | |
| 117 | |
| 118 des++; | |
| 119 } | |
| 120 } | |
| 121 | |
| 122 /**************************************************************************** | |
| 123 * | |
| 124 * ROUTINE : vp8_last_vertical_band_4_5_scale_c | |
| 125 * | |
| 126 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 127 * unsigned int dest_pitch : Stride of destination data. | |
| 128 * unsigned int dest_width : Width of destination data. | |
| 129 * | |
| 130 * OUTPUTS : None. | |
| 131 * | |
| 132 * RETURNS : void | |
| 133 * | |
| 134 * FUNCTION : Scales last vertical band of pixels by scale 4 to 5. The | |
| 135 * height of the band scaled is 4-pixels. | |
| 136 * | |
| 137 * SPECIAL NOTES : The routine does not have available the first line of | |
| 138 * the band below the current band, since this is the | |
| 139 * last band. | |
| 140 * | |
| 141 ****************************************************************************/ | |
| 142 void vp8_last_vertical_band_4_5_scale_c(unsigned char *dest, | |
| 143 unsigned int dest_pitch, | |
| 144 unsigned int dest_width) { | |
| 145 unsigned int i; | |
| 146 unsigned int a, b, c, d; | |
| 147 unsigned char *des = dest; | |
| 148 | |
| 149 for (i = 0; i < dest_width; ++i) { | |
| 150 a = des[0]; | |
| 151 b = des[dest_pitch]; | |
| 152 | |
| 153 des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8); | |
| 154 | |
| 155 c = des[dest_pitch * 2] * 154; | |
| 156 d = des[dest_pitch * 3]; | |
| 157 | |
| 158 des [dest_pitch * 2] = (unsigned char)((b * 102 + c + 128) >> 8); | |
| 159 des [dest_pitch * 3] = (unsigned char)((c + 102 * d + 128) >> 8); | |
| 160 | |
| 161 /* No other line for interplation of this line, so .. */ | |
| 162 des[dest_pitch * 4] = (unsigned char) d; | |
| 163 | |
| 164 des++; | |
| 165 } | |
| 166 } | |
| 167 | |
| 168 /**************************************************************************** | |
| 169 * | |
| 170 * ROUTINE : vp8_horizontal_line_2_3_scale_c | |
| 171 * | |
| 172 * INPUTS : const unsigned char *source : Pointer to source data. | |
| 173 * unsigned int source_width : Stride of source. | |
| 174 * unsigned char *dest : Pointer to destination data. | |
| 175 * unsigned int dest_width : Stride of destination (NOT US
ED). | |
| 176 * | |
| 177 * OUTPUTS : None. | |
| 178 * | |
| 179 * RETURNS : void | |
| 180 * | |
| 181 * FUNCTION : Copies horizontal line of pixels from source to | |
| 182 * destination scaling up by 2 to 3. | |
| 183 * | |
| 184 * SPECIAL NOTES : None. | |
| 185 * | |
| 186 * | |
| 187 ****************************************************************************/ | |
| 188 void vp8_horizontal_line_2_3_scale_c(const unsigned char *source, | |
| 189 unsigned int source_width, | |
| 190 unsigned char *dest, | |
| 191 unsigned int dest_width) { | |
| 192 unsigned int i; | |
| 193 unsigned int a, b, c; | |
| 194 unsigned char *des = dest; | |
| 195 const unsigned char *src = source; | |
| 196 | |
| 197 (void) dest_width; | |
| 198 | |
| 199 for (i = 0; i < source_width - 2; i += 2) { | |
| 200 a = src[0]; | |
| 201 b = src[1]; | |
| 202 c = src[2]; | |
| 203 | |
| 204 des [0] = (unsigned char)(a); | |
| 205 des [1] = (unsigned char)((a * 85 + 171 * b + 128) >> 8); | |
| 206 des [2] = (unsigned char)((b * 171 + 85 * c + 128) >> 8); | |
| 207 | |
| 208 src += 2; | |
| 209 des += 3; | |
| 210 } | |
| 211 | |
| 212 a = src[0]; | |
| 213 b = src[1]; | |
| 214 des [0] = (unsigned char)(a); | |
| 215 des [1] = (unsigned char)((a * 85 + 171 * b + 128) >> 8); | |
| 216 des [2] = (unsigned char)(b); | |
| 217 } | |
| 218 | |
| 219 | |
| 220 /**************************************************************************** | |
| 221 * | |
| 222 * ROUTINE : vp8_vertical_band_2_3_scale_c | |
| 223 * | |
| 224 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 225 * unsigned int dest_pitch : Stride of destination data. | |
| 226 * unsigned int dest_width : Width of destination data. | |
| 227 * | |
| 228 * OUTPUTS : None. | |
| 229 * | |
| 230 * RETURNS : void | |
| 231 * | |
| 232 * FUNCTION : Scales vertical band of pixels by scale 2 to 3. The | |
| 233 * height of the band scaled is 2-pixels. | |
| 234 * | |
| 235 * SPECIAL NOTES : The routine uses the first line of the band below | |
| 236 * the current band. | |
| 237 * | |
| 238 ****************************************************************************/ | |
| 239 void vp8_vertical_band_2_3_scale_c(unsigned char *dest, | |
| 240 unsigned int dest_pitch, | |
| 241 unsigned int dest_width) { | |
| 242 unsigned int i; | |
| 243 unsigned int a, b, c; | |
| 244 unsigned char *des = dest; | |
| 245 | |
| 246 for (i = 0; i < dest_width; i++) { | |
| 247 a = des [0]; | |
| 248 b = des [dest_pitch]; | |
| 249 c = des[dest_pitch * 3]; | |
| 250 des [dest_pitch ] = (unsigned char)((a * 85 + 171 * b + 128) >> 8); | |
| 251 des [dest_pitch * 2] = (unsigned char)((b * 171 + 85 * c + 128) >> 8); | |
| 252 | |
| 253 des++; | |
| 254 } | |
| 255 } | |
| 256 | |
| 257 /**************************************************************************** | |
| 258 * | |
| 259 * ROUTINE : vp8_last_vertical_band_2_3_scale_c | |
| 260 * | |
| 261 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 262 * unsigned int dest_pitch : Stride of destination data. | |
| 263 * unsigned int dest_width : Width of destination data. | |
| 264 * | |
| 265 * OUTPUTS : None. | |
| 266 * | |
| 267 * RETURNS : void | |
| 268 * | |
| 269 * FUNCTION : Scales last vertical band of pixels by scale 2 to 3. The | |
| 270 * height of the band scaled is 2-pixels. | |
| 271 * | |
| 272 * SPECIAL NOTES : The routine does not have available the first line of | |
| 273 * the band below the current band, since this is the | |
| 274 * last band. | |
| 275 * | |
| 276 ****************************************************************************/ | |
| 277 void vp8_last_vertical_band_2_3_scale_c(unsigned char *dest, | |
| 278 unsigned int dest_pitch, | |
| 279 unsigned int dest_width) { | |
| 280 unsigned int i; | |
| 281 unsigned int a, b; | |
| 282 unsigned char *des = dest; | |
| 283 | |
| 284 for (i = 0; i < dest_width; ++i) { | |
| 285 a = des [0]; | |
| 286 b = des [dest_pitch]; | |
| 287 | |
| 288 des [dest_pitch ] = (unsigned char)((a * 85 + 171 * b + 128) >> 8); | |
| 289 des [dest_pitch * 2] = (unsigned char)(b); | |
| 290 des++; | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 /**************************************************************************** | |
| 295 * | |
| 296 * ROUTINE : vp8_horizontal_line_3_5_scale_c | |
| 297 * | |
| 298 * INPUTS : const unsigned char *source : Pointer to source data. | |
| 299 * unsigned int source_width : Stride of source. | |
| 300 * unsigned char *dest : Pointer to destination data. | |
| 301 * unsigned int dest_width : Stride of destination (NOT US
ED). | |
| 302 * | |
| 303 * OUTPUTS : None. | |
| 304 * | |
| 305 * RETURNS : void | |
| 306 * | |
| 307 * FUNCTION : Copies horizontal line of pixels from source to | |
| 308 * destination scaling up by 3 to 5. | |
| 309 * | |
| 310 * SPECIAL NOTES : None. | |
| 311 * | |
| 312 * | |
| 313 ****************************************************************************/ | |
| 314 void vp8_horizontal_line_3_5_scale_c(const unsigned char *source, | |
| 315 unsigned int source_width, | |
| 316 unsigned char *dest, | |
| 317 unsigned int dest_width) { | |
| 318 unsigned int i; | |
| 319 unsigned int a, b, c; | |
| 320 unsigned char *des = dest; | |
| 321 const unsigned char *src = source; | |
| 322 | |
| 323 (void) dest_width; | |
| 324 | |
| 325 for (i = 0; i < source_width - 3; i += 3) { | |
| 326 a = src[0]; | |
| 327 b = src[1]; | |
| 328 des [0] = (unsigned char)(a); | |
| 329 des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8); | |
| 330 | |
| 331 c = src[2]; | |
| 332 des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8); | |
| 333 des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8); | |
| 334 | |
| 335 a = src[3]; | |
| 336 des [4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8); | |
| 337 | |
| 338 src += 3; | |
| 339 des += 5; | |
| 340 } | |
| 341 | |
| 342 a = src[0]; | |
| 343 b = src[1]; | |
| 344 des [0] = (unsigned char)(a); | |
| 345 | |
| 346 des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8); | |
| 347 c = src[2]; | |
| 348 des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8); | |
| 349 des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8); | |
| 350 | |
| 351 des [4] = (unsigned char)(c); | |
| 352 } | |
| 353 | |
| 354 /**************************************************************************** | |
| 355 * | |
| 356 * ROUTINE : vp8_vertical_band_3_5_scale_c | |
| 357 * | |
| 358 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 359 * unsigned int dest_pitch : Stride of destination data. | |
| 360 * unsigned int dest_width : Width of destination data. | |
| 361 * | |
| 362 * OUTPUTS : None. | |
| 363 * | |
| 364 * RETURNS : void | |
| 365 * | |
| 366 * FUNCTION : Scales vertical band of pixels by scale 3 to 5. The | |
| 367 * height of the band scaled is 3-pixels. | |
| 368 * | |
| 369 * SPECIAL NOTES : The routine uses the first line of the band below | |
| 370 * the current band. | |
| 371 * | |
| 372 ****************************************************************************/ | |
| 373 void vp8_vertical_band_3_5_scale_c(unsigned char *dest, | |
| 374 unsigned int dest_pitch, | |
| 375 unsigned int dest_width) { | |
| 376 unsigned int i; | |
| 377 unsigned int a, b, c; | |
| 378 unsigned char *des = dest; | |
| 379 | |
| 380 for (i = 0; i < dest_width; i++) { | |
| 381 a = des [0]; | |
| 382 b = des [dest_pitch]; | |
| 383 des [dest_pitch] = (unsigned char)((a * 102 + 154 * b + 128) >> 8); | |
| 384 | |
| 385 c = des[dest_pitch * 2]; | |
| 386 des [dest_pitch * 2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8); | |
| 387 des [dest_pitch * 3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8); | |
| 388 | |
| 389 /* First line in next band... */ | |
| 390 a = des [dest_pitch * 5]; | |
| 391 des [dest_pitch * 4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8); | |
| 392 | |
| 393 des++; | |
| 394 } | |
| 395 } | |
| 396 | |
| 397 /**************************************************************************** | |
| 398 * | |
| 399 * ROUTINE : vp8_last_vertical_band_3_5_scale_c | |
| 400 * | |
| 401 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 402 * unsigned int dest_pitch : Stride of destination data. | |
| 403 * unsigned int dest_width : Width of destination data. | |
| 404 * | |
| 405 * OUTPUTS : None. | |
| 406 * | |
| 407 * RETURNS : void | |
| 408 * | |
| 409 * FUNCTION : Scales last vertical band of pixels by scale 3 to 5. The | |
| 410 * height of the band scaled is 3-pixels. | |
| 411 * | |
| 412 * SPECIAL NOTES : The routine does not have available the first line of | |
| 413 * the band below the current band, since this is the | |
| 414 * last band. | |
| 415 * | |
| 416 ****************************************************************************/ | |
| 417 void vp8_last_vertical_band_3_5_scale_c(unsigned char *dest, | |
| 418 unsigned int dest_pitch, | |
| 419 unsigned int dest_width) { | |
| 420 unsigned int i; | |
| 421 unsigned int a, b, c; | |
| 422 unsigned char *des = dest; | |
| 423 | |
| 424 for (i = 0; i < dest_width; ++i) { | |
| 425 a = des [0]; | |
| 426 b = des [dest_pitch]; | |
| 427 | |
| 428 des [ dest_pitch ] = (unsigned char)((a * 102 + 154 * b + 128) >> 8); | |
| 429 | |
| 430 c = des[dest_pitch * 2]; | |
| 431 des [dest_pitch * 2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8); | |
| 432 des [dest_pitch * 3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8); | |
| 433 | |
| 434 /* No other line for interplation of this line, so .. */ | |
| 435 des [ dest_pitch * 4 ] = (unsigned char)(c); | |
| 436 | |
| 437 des++; | |
| 438 } | |
| 439 } | |
| 440 | |
| 441 /**************************************************************************** | |
| 442 * | |
| 443 * ROUTINE : vp8_horizontal_line_3_4_scale_c | |
| 444 * | |
| 445 * INPUTS : const unsigned char *source : Pointer to source data. | |
| 446 * unsigned int source_width : Stride of source. | |
| 447 * unsigned char *dest : Pointer to destination data. | |
| 448 * unsigned int dest_width : Stride of destination (NOT US
ED). | |
| 449 * | |
| 450 * OUTPUTS : None. | |
| 451 * | |
| 452 * RETURNS : void | |
| 453 * | |
| 454 * FUNCTION : Copies horizontal line of pixels from source to | |
| 455 * destination scaling up by 3 to 4. | |
| 456 * | |
| 457 * SPECIAL NOTES : None. | |
| 458 * | |
| 459 * | |
| 460 ****************************************************************************/ | |
| 461 void vp8_horizontal_line_3_4_scale_c(const unsigned char *source, | |
| 462 unsigned int source_width, | |
| 463 unsigned char *dest, | |
| 464 unsigned int dest_width) { | |
| 465 unsigned int i; | |
| 466 unsigned int a, b, c; | |
| 467 unsigned char *des = dest; | |
| 468 const unsigned char *src = source; | |
| 469 | |
| 470 (void) dest_width; | |
| 471 | |
| 472 for (i = 0; i < source_width - 3; i += 3) { | |
| 473 a = src[0]; | |
| 474 b = src[1]; | |
| 475 des [0] = (unsigned char)(a); | |
| 476 des [1] = (unsigned char)((a * 64 + b * 192 + 128) >> 8); | |
| 477 | |
| 478 c = src[2]; | |
| 479 des [2] = (unsigned char)((b + c + 1) >> 1); | |
| 480 | |
| 481 a = src[3]; | |
| 482 des [3] = (unsigned char)((c * 192 + a * 64 + 128) >> 8); | |
| 483 | |
| 484 src += 3; | |
| 485 des += 4; | |
| 486 } | |
| 487 | |
| 488 a = src[0]; | |
| 489 b = src[1]; | |
| 490 des [0] = (unsigned char)(a); | |
| 491 des [1] = (unsigned char)((a * 64 + b * 192 + 128) >> 8); | |
| 492 | |
| 493 c = src[2]; | |
| 494 des [2] = (unsigned char)((b + c + 1) >> 1); | |
| 495 des [3] = (unsigned char)(c); | |
| 496 } | |
| 497 | |
| 498 /**************************************************************************** | |
| 499 * | |
| 500 * ROUTINE : vp8_vertical_band_3_4_scale_c | |
| 501 * | |
| 502 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 503 * unsigned int dest_pitch : Stride of destination data. | |
| 504 * unsigned int dest_width : Width of destination data. | |
| 505 * | |
| 506 * OUTPUTS : None. | |
| 507 * | |
| 508 * RETURNS : void | |
| 509 * | |
| 510 * FUNCTION : Scales vertical band of pixels by scale 3 to 4. The | |
| 511 * height of the band scaled is 3-pixels. | |
| 512 * | |
| 513 * SPECIAL NOTES : The routine uses the first line of the band below | |
| 514 * the current band. | |
| 515 * | |
| 516 ****************************************************************************/ | |
| 517 void vp8_vertical_band_3_4_scale_c(unsigned char *dest, | |
| 518 unsigned int dest_pitch, | |
| 519 unsigned int dest_width) { | |
| 520 unsigned int i; | |
| 521 unsigned int a, b, c; | |
| 522 unsigned char *des = dest; | |
| 523 | |
| 524 for (i = 0; i < dest_width; i++) { | |
| 525 a = des [0]; | |
| 526 b = des [dest_pitch]; | |
| 527 des [dest_pitch] = (unsigned char)((a * 64 + b * 192 + 128) >> 8); | |
| 528 | |
| 529 c = des[dest_pitch * 2]; | |
| 530 des [dest_pitch * 2] = (unsigned char)((b + c + 1) >> 1); | |
| 531 | |
| 532 /* First line in next band... */ | |
| 533 a = des [dest_pitch * 4]; | |
| 534 des [dest_pitch * 3] = (unsigned char)((c * 192 + a * 64 + 128) >> 8); | |
| 535 | |
| 536 des++; | |
| 537 } | |
| 538 } | |
| 539 | |
| 540 /**************************************************************************** | |
| 541 * | |
| 542 * ROUTINE : vp8_last_vertical_band_3_4_scale_c | |
| 543 * | |
| 544 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 545 * unsigned int dest_pitch : Stride of destination data. | |
| 546 * unsigned int dest_width : Width of destination data. | |
| 547 * | |
| 548 * OUTPUTS : None. | |
| 549 * | |
| 550 * RETURNS : void | |
| 551 * | |
| 552 * FUNCTION : Scales last vertical band of pixels by scale 3 to 4. The | |
| 553 * height of the band scaled is 3-pixels. | |
| 554 * | |
| 555 * SPECIAL NOTES : The routine does not have available the first line of | |
| 556 * the band below the current band, since this is the | |
| 557 * last band. | |
| 558 * | |
| 559 ****************************************************************************/ | |
| 560 void vp8_last_vertical_band_3_4_scale_c(unsigned char *dest, | |
| 561 unsigned int dest_pitch, | |
| 562 unsigned int dest_width) { | |
| 563 unsigned int i; | |
| 564 unsigned int a, b, c; | |
| 565 unsigned char *des = dest; | |
| 566 | |
| 567 for (i = 0; i < dest_width; ++i) { | |
| 568 a = des [0]; | |
| 569 b = des [dest_pitch]; | |
| 570 | |
| 571 des [dest_pitch] = (unsigned char)((a * 64 + b * 192 + 128) >> 8); | |
| 572 | |
| 573 c = des[dest_pitch * 2]; | |
| 574 des [dest_pitch * 2] = (unsigned char)((b + c + 1) >> 1); | |
| 575 | |
| 576 /* No other line for interplation of this line, so .. */ | |
| 577 des [dest_pitch * 3] = (unsigned char)(c); | |
| 578 | |
| 579 des++; | |
| 580 } | |
| 581 } | |
| 582 | |
| 583 /**************************************************************************** | |
| 584 * | |
| 585 * ROUTINE : vp8_horizontal_line_1_2_scale_c | |
| 586 * | |
| 587 * INPUTS : const unsigned char *source : Pointer to source data. | |
| 588 * unsigned int source_width : Stride of source. | |
| 589 * unsigned char *dest : Pointer to destination data. | |
| 590 * unsigned int dest_width : Stride of destination (NOT US
ED). | |
| 591 * | |
| 592 * OUTPUTS : None. | |
| 593 * | |
| 594 * RETURNS : void | |
| 595 * | |
| 596 * FUNCTION : Copies horizontal line of pixels from source to | |
| 597 * destination scaling up by 1 to 2. | |
| 598 * | |
| 599 * SPECIAL NOTES : None. | |
| 600 * | |
| 601 ****************************************************************************/ | |
| 602 void vp8_horizontal_line_1_2_scale_c(const unsigned char *source, | |
| 603 unsigned int source_width, | |
| 604 unsigned char *dest, | |
| 605 unsigned int dest_width) { | |
| 606 unsigned int i; | |
| 607 unsigned int a, b; | |
| 608 unsigned char *des = dest; | |
| 609 const unsigned char *src = source; | |
| 610 | |
| 611 (void) dest_width; | |
| 612 | |
| 613 for (i = 0; i < source_width - 1; i += 1) { | |
| 614 a = src[0]; | |
| 615 b = src[1]; | |
| 616 des [0] = (unsigned char)(a); | |
| 617 des [1] = (unsigned char)((a + b + 1) >> 1); | |
| 618 src += 1; | |
| 619 des += 2; | |
| 620 } | |
| 621 | |
| 622 a = src[0]; | |
| 623 des [0] = (unsigned char)(a); | |
| 624 des [1] = (unsigned char)(a); | |
| 625 } | |
| 626 | |
| 627 /**************************************************************************** | |
| 628 * | |
| 629 * ROUTINE : vp8_vertical_band_1_2_scale_c | |
| 630 * | |
| 631 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 632 * unsigned int dest_pitch : Stride of destination data. | |
| 633 * unsigned int dest_width : Width of destination data. | |
| 634 * | |
| 635 * OUTPUTS : None. | |
| 636 * | |
| 637 * RETURNS : void | |
| 638 * | |
| 639 * FUNCTION : Scales vertical band of pixels by scale 1 to 2. The | |
| 640 * height of the band scaled is 1-pixel. | |
| 641 * | |
| 642 * SPECIAL NOTES : The routine uses the first line of the band below | |
| 643 * the current band. | |
| 644 * | |
| 645 ****************************************************************************/ | |
| 646 void vp8_vertical_band_1_2_scale_c(unsigned char *dest, | |
| 647 unsigned int dest_pitch, | |
| 648 unsigned int dest_width) { | |
| 649 unsigned int i; | |
| 650 unsigned int a, b; | |
| 651 unsigned char *des = dest; | |
| 652 | |
| 653 for (i = 0; i < dest_width; i++) { | |
| 654 a = des [0]; | |
| 655 b = des [dest_pitch * 2]; | |
| 656 | |
| 657 des[dest_pitch] = (unsigned char)((a + b + 1) >> 1); | |
| 658 | |
| 659 des++; | |
| 660 } | |
| 661 } | |
| 662 | |
| 663 /**************************************************************************** | |
| 664 * | |
| 665 * ROUTINE : vp8_last_vertical_band_1_2_scale_c | |
| 666 * | |
| 667 * INPUTS : unsigned char *dest : Pointer to destination data. | |
| 668 * unsigned int dest_pitch : Stride of destination data. | |
| 669 * unsigned int dest_width : Width of destination data. | |
| 670 * | |
| 671 * OUTPUTS : None. | |
| 672 * | |
| 673 * RETURNS : void | |
| 674 * | |
| 675 * FUNCTION : Scales last vertical band of pixels by scale 1 to 2. The | |
| 676 * height of the band scaled is 1-pixel. | |
| 677 * | |
| 678 * SPECIAL NOTES : The routine does not have available the first line of | |
| 679 * the band below the current band, since this is the | |
| 680 * last band. | |
| 681 * | |
| 682 ****************************************************************************/ | |
| 683 void vp8_last_vertical_band_1_2_scale_c(unsigned char *dest, | |
| 684 unsigned int dest_pitch, | |
| 685 unsigned int dest_width) { | |
| 686 unsigned int i; | |
| 687 unsigned char *des = dest; | |
| 688 | |
| 689 for (i = 0; i < dest_width; ++i) { | |
| 690 des[dest_pitch] = des[0]; | |
| 691 des++; | |
| 692 } | |
| 693 } | |
| 694 | |
| 695 | |
| 696 | |
| 697 | |
| 698 | |
| 699 /**************************************************************************** | |
| 700 * | |
| 701 * ROUTINE : vp8_horizontal_line_4_5_scale_c | |
| 702 * | |
| 703 * INPUTS : const unsigned char *source : Pointer to source data. | |
| 704 * unsigned int source_width : Stride of source. | |
| 705 * unsigned char *dest : Pointer to destination data. | |
| 706 * unsigned int dest_width : Stride of destination (NOT US
ED). | |
| 707 * | |
| 708 * OUTPUTS : None. | |
| 709 * | |
| 710 * RETURNS : void | |
| 711 * | |
| 712 * FUNCTION : Copies horizontal line of pixels from source to | |
| 713 * destination scaling up by 4 to 5. | |
| 714 * | |
| 715 * SPECIAL NOTES : None. | |
| 716 * | |
| 717 ****************************************************************************/ | |
| 718 void vp8_horizontal_line_5_4_scale_c(const unsigned char *source, | 36 void vp8_horizontal_line_5_4_scale_c(const unsigned char *source, |
| 719 unsigned int source_width, | 37 unsigned int source_width, |
| 720 unsigned char *dest, | 38 unsigned char *dest, |
| 721 unsigned int dest_width) { | 39 unsigned int dest_width) { |
| 722 unsigned i; | 40 unsigned i; |
| 723 unsigned int a, b, c, d, e; | 41 unsigned int a, b, c, d, e; |
| 724 unsigned char *des = dest; | 42 unsigned char *des = dest; |
| 725 const unsigned char *src = source; | 43 const unsigned char *src = source; |
| 726 | 44 |
| 727 (void) dest_width; | 45 (void) dest_width; |
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| 913 | 231 |
| 914 for (i = 0; i < width; i++) { | 232 for (i = 0; i < width; i++) { |
| 915 temp = 8; | 233 temp = 8; |
| 916 temp += source[i - (int)src_pitch] * 3; | 234 temp += source[i - (int)src_pitch] * 3; |
| 917 temp += source[i] * 10; | 235 temp += source[i] * 10; |
| 918 temp += source[i + src_pitch] * 3; | 236 temp += source[i + src_pitch] * 3; |
| 919 temp >>= 4; | 237 temp >>= 4; |
| 920 dest[i] = (unsigned char)(temp); | 238 dest[i] = (unsigned char)(temp); |
| 921 } | 239 } |
| 922 } | 240 } |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 11555023:
libvpx: Add VP9 decoder. (Closed)
Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/libvpx/