| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | /* This is the software implementation of the YUV video overlay support */ |
| 25 | |
| 26 | /* This code was derived from code carrying the following copyright notices: |
| 27 | |
| 28 | * Copyright (c) 1995 The Regents of the University of California. |
| 29 | * All rights reserved. |
| 30 | * |
| 31 | * Permission to use, copy, modify, and distribute this software and its |
| 32 | * documentation for any purpose, without fee, and without written agreement is |
| 33 | * hereby granted, provided that the above copyright notice and the following |
| 34 | * two paragraphs appear in all copies of this software. |
| 35 | * |
| 36 | * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR |
| 37 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT |
| 38 | * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF |
| 39 | * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 40 | * |
| 41 | * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, |
| 42 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
| 43 | * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
| 44 | * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO |
| 45 | * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 46 | |
| 47 | * Copyright (c) 1995 Erik Corry |
| 48 | * All rights reserved. |
| 49 | * |
| 50 | * Permission to use, copy, modify, and distribute this software and its |
| 51 | * documentation for any purpose, without fee, and without written agreement is |
| 52 | * hereby granted, provided that the above copyright notice and the following |
| 53 | * two paragraphs appear in all copies of this software. |
| 54 | * |
| 55 | * IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, |
| 56 | * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF |
| 57 | * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED |
| 58 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 59 | * |
| 60 | * ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT |
| 61 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| 62 | * PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" |
| 63 | * BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, |
| 64 | * UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 65 | |
| 66 | * Portions of this software Copyright (c) 1995 Brown University. |
| 67 | * All rights reserved. |
| 68 | * |
| 69 | * Permission to use, copy, modify, and distribute this software and its |
| 70 | * documentation for any purpose, without fee, and without written agreement |
| 71 | * is hereby granted, provided that the above copyright notice and the |
| 72 | * following two paragraphs appear in all copies of this software. |
| 73 | * |
| 74 | * IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR |
| 75 | * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT |
| 76 | * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN |
| 77 | * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 78 | * |
| 79 | * BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT |
| 80 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
| 81 | * PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" |
| 82 | * BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, |
| 83 | * SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| 84 | */ |
| 85 | |
| 86 | #include "SDL_video.h" |
| 87 | #include "SDL_cpuinfo.h" |
| 88 | #include "SDL_stretch_c.h" |
| 89 | #include "SDL_yuvfuncs.h" |
| 90 | #include "SDL_yuv_sw_c.h" |
| 91 | |
| 92 | /* The functions used to manipulate software video overlays */ |
| 93 | static struct private_yuvhwfuncs sw_yuvfuncs = { |
| 94 | SDL_LockYUV_SW, |
| 95 | SDL_UnlockYUV_SW, |
| 96 | SDL_DisplayYUV_SW, |
| 97 | SDL_FreeYUV_SW |
| 98 | }; |
| 99 | |
| 100 | /* RGB conversion lookup tables */ |
| 101 | struct private_yuvhwdata { |
| 102 | SDL_Surface *stretch; |
| 103 | SDL_Surface *display; |
| 104 | Uint8 *pixels; |
| 105 | int *colortab; |
| 106 | Uint32 *rgb_2_pix; |
| 107 | void (*Display1X)(int *colortab, Uint32 *rgb_2_pix, |
| 108 | unsigned char *lum, unsigned char *cr, |
| 109 | unsigned char *cb, unsigned char *out, |
| 110 | int rows, int cols, int mod ); |
| 111 | void (*Display2X)(int *colortab, Uint32 *rgb_2_pix, |
| 112 | unsigned char *lum, unsigned char *cr, |
| 113 | unsigned char *cb, unsigned char *out, |
| 114 | int rows, int cols, int mod ); |
| 115 | |
| 116 | /* These are just so we don't have to allocate them separately */ |
| 117 | Uint16 pitches[3]; |
| 118 | Uint8 *planes[3]; |
| 119 | }; |
| 120 | |
| 121 | |
| 122 | /* The colorspace conversion functions */ |
| 123 | |
| 124 | #if (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES |
| 125 | extern void Color565DitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix, |
| 126 | unsigned char *lum, unsigned char *cr, |
| 127 | unsigned char *cb, unsigned char *out, |
| 128 | int rows, int cols, int mod ); |
| 129 | extern void ColorRGBDitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix, |
| 130 | unsigned char *lum, unsigned char *cr, |
| 131 | unsigned char *cb, unsigned char *out, |
| 132 | int rows, int cols, int mod ); |
| 133 | #endif |
| 134 | |
| 135 | static void Color16DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix, |
| 136 | unsigned char *lum, unsigned char *cr, |
| 137 | unsigned char *cb, unsigned char *out, |
| 138 | int rows, int cols, int mod ) |
| 139 | { |
| 140 | unsigned short* row1; |
| 141 | unsigned short* row2; |
| 142 | unsigned char* lum2; |
| 143 | int x, y; |
| 144 | int cr_r; |
| 145 | int crb_g; |
| 146 | int cb_b; |
| 147 | int cols_2 = cols / 2; |
| 148 | |
| 149 | row1 = (unsigned short*) out; |
| 150 | row2 = row1 + cols + mod; |
| 151 | lum2 = lum + cols; |
| 152 | |
| 153 | mod += cols + mod; |
| 154 | |
| 155 | y = rows / 2; |
| 156 | while( y-- ) |
| 157 | { |
| 158 | x = cols_2; |
| 159 | while( x-- ) |
| 160 | { |
| 161 | register int L; |
| 162 | |
| 163 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 164 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 165 | + colortab[ *cb + 2*256 ]; |
| 166 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 167 | ++cr; ++cb; |
| 168 | |
| 169 | L = *lum++; |
| 170 | *row1++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
| 171 | rgb_2_pix[ L + crb_g ] | |
| 172 | rgb_2_pix[ L + cb_b ]); |
| 173 | |
| 174 | L = *lum++; |
| 175 | *row1++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
| 176 | rgb_2_pix[ L + crb_g ] | |
| 177 | rgb_2_pix[ L + cb_b ]); |
| 178 | |
| 179 | |
| 180 | /* Now, do second row. */ |
| 181 | |
| 182 | L = *lum2++; |
| 183 | *row2++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
| 184 | rgb_2_pix[ L + crb_g ] | |
| 185 | rgb_2_pix[ L + cb_b ]); |
| 186 | |
| 187 | L = *lum2++; |
| 188 | *row2++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
| 189 | rgb_2_pix[ L + crb_g ] | |
| 190 | rgb_2_pix[ L + cb_b ]); |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * These values are at the start of the next line, (due |
| 195 | * to the ++'s above),but they need to be at the start |
| 196 | * of the line after that. |
| 197 | */ |
| 198 | lum += cols; |
| 199 | lum2 += cols; |
| 200 | row1 += mod; |
| 201 | row2 += mod; |
| 202 | } |
| 203 | } |
| 204 | |
| 205 | static void Color24DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix, |
| 206 | unsigned char *lum, unsigned char *cr, |
| 207 | unsigned char *cb, unsigned char *out, |
| 208 | int rows, int cols, int mod ) |
| 209 | { |
| 210 | unsigned int value; |
| 211 | unsigned char* row1; |
| 212 | unsigned char* row2; |
| 213 | unsigned char* lum2; |
| 214 | int x, y; |
| 215 | int cr_r; |
| 216 | int crb_g; |
| 217 | int cb_b; |
| 218 | int cols_2 = cols / 2; |
| 219 | |
| 220 | row1 = out; |
| 221 | row2 = row1 + cols*3 + mod*3; |
| 222 | lum2 = lum + cols; |
| 223 | |
| 224 | mod += cols + mod; |
| 225 | mod *= 3; |
| 226 | |
| 227 | y = rows / 2; |
| 228 | while( y-- ) |
| 229 | { |
| 230 | x = cols_2; |
| 231 | while( x-- ) |
| 232 | { |
| 233 | register int L; |
| 234 | |
| 235 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 236 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 237 | + colortab[ *cb + 2*256 ]; |
| 238 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 239 | ++cr; ++cb; |
| 240 | |
| 241 | L = *lum++; |
| 242 | value = (rgb_2_pix[ L + cr_r ] | |
| 243 | rgb_2_pix[ L + crb_g ] | |
| 244 | rgb_2_pix[ L + cb_b ]); |
| 245 | *row1++ = (value ) & 0xFF; |
| 246 | *row1++ = (value >> 8) & 0xFF; |
| 247 | *row1++ = (value >> 16) & 0xFF; |
| 248 | |
| 249 | L = *lum++; |
| 250 | value = (rgb_2_pix[ L + cr_r ] | |
| 251 | rgb_2_pix[ L + crb_g ] | |
| 252 | rgb_2_pix[ L + cb_b ]); |
| 253 | *row1++ = (value ) & 0xFF; |
| 254 | *row1++ = (value >> 8) & 0xFF; |
| 255 | *row1++ = (value >> 16) & 0xFF; |
| 256 | |
| 257 | |
| 258 | /* Now, do second row. */ |
| 259 | |
| 260 | L = *lum2++; |
| 261 | value = (rgb_2_pix[ L + cr_r ] | |
| 262 | rgb_2_pix[ L + crb_g ] | |
| 263 | rgb_2_pix[ L + cb_b ]); |
| 264 | *row2++ = (value ) & 0xFF; |
| 265 | *row2++ = (value >> 8) & 0xFF; |
| 266 | *row2++ = (value >> 16) & 0xFF; |
| 267 | |
| 268 | L = *lum2++; |
| 269 | value = (rgb_2_pix[ L + cr_r ] | |
| 270 | rgb_2_pix[ L + crb_g ] | |
| 271 | rgb_2_pix[ L + cb_b ]); |
| 272 | *row2++ = (value ) & 0xFF; |
| 273 | *row2++ = (value >> 8) & 0xFF; |
| 274 | *row2++ = (value >> 16) & 0xFF; |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * These values are at the start of the next line, (due |
| 279 | * to the ++'s above),but they need to be at the start |
| 280 | * of the line after that. |
| 281 | */ |
| 282 | lum += cols; |
| 283 | lum2 += cols; |
| 284 | row1 += mod; |
| 285 | row2 += mod; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | static void Color32DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix, |
| 290 | unsigned char *lum, unsigned char *cr, |
| 291 | unsigned char *cb, unsigned char *out, |
| 292 | int rows, int cols, int mod ) |
| 293 | { |
| 294 | unsigned int* row1; |
| 295 | unsigned int* row2; |
| 296 | unsigned char* lum2; |
| 297 | int x, y; |
| 298 | int cr_r; |
| 299 | int crb_g; |
| 300 | int cb_b; |
| 301 | int cols_2 = cols / 2; |
| 302 | |
| 303 | row1 = (unsigned int*) out; |
| 304 | row2 = row1 + cols + mod; |
| 305 | lum2 = lum + cols; |
| 306 | |
| 307 | mod += cols + mod; |
| 308 | |
| 309 | y = rows / 2; |
| 310 | while( y-- ) |
| 311 | { |
| 312 | x = cols_2; |
| 313 | while( x-- ) |
| 314 | { |
| 315 | register int L; |
| 316 | |
| 317 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 318 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 319 | + colortab[ *cb + 2*256 ]; |
| 320 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 321 | ++cr; ++cb; |
| 322 | |
| 323 | L = *lum++; |
| 324 | *row1++ = (rgb_2_pix[ L + cr_r ] | |
| 325 | rgb_2_pix[ L + crb_g ] | |
| 326 | rgb_2_pix[ L + cb_b ]); |
| 327 | |
| 328 | L = *lum++; |
| 329 | *row1++ = (rgb_2_pix[ L + cr_r ] | |
| 330 | rgb_2_pix[ L + crb_g ] | |
| 331 | rgb_2_pix[ L + cb_b ]); |
| 332 | |
| 333 | |
| 334 | /* Now, do second row. */ |
| 335 | |
| 336 | L = *lum2++; |
| 337 | *row2++ = (rgb_2_pix[ L + cr_r ] | |
| 338 | rgb_2_pix[ L + crb_g ] | |
| 339 | rgb_2_pix[ L + cb_b ]); |
| 340 | |
| 341 | L = *lum2++; |
| 342 | *row2++ = (rgb_2_pix[ L + cr_r ] | |
| 343 | rgb_2_pix[ L + crb_g ] | |
| 344 | rgb_2_pix[ L + cb_b ]); |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * These values are at the start of the next line, (due |
| 349 | * to the ++'s above),but they need to be at the start |
| 350 | * of the line after that. |
| 351 | */ |
| 352 | lum += cols; |
| 353 | lum2 += cols; |
| 354 | row1 += mod; |
| 355 | row2 += mod; |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | * In this function I make use of a nasty trick. The tables have the lower |
| 361 | * 16 bits replicated in the upper 16. This means I can write ints and get |
| 362 | * the horisontal doubling for free (almost). |
| 363 | */ |
| 364 | static void Color16DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix, |
| 365 | unsigned char *lum, unsigned char *cr, |
| 366 | unsigned char *cb, unsigned char *out, |
| 367 | int rows, int cols, int mod ) |
| 368 | { |
| 369 | unsigned int* row1 = (unsigned int*) out; |
| 370 | const int next_row = cols+(mod/2); |
| 371 | unsigned int* row2 = row1 + 2*next_row; |
| 372 | unsigned char* lum2; |
| 373 | int x, y; |
| 374 | int cr_r; |
| 375 | int crb_g; |
| 376 | int cb_b; |
| 377 | int cols_2 = cols / 2; |
| 378 | |
| 379 | lum2 = lum + cols; |
| 380 | |
| 381 | mod = (next_row * 3) + (mod/2); |
| 382 | |
| 383 | y = rows / 2; |
| 384 | while( y-- ) |
| 385 | { |
| 386 | x = cols_2; |
| 387 | while( x-- ) |
| 388 | { |
| 389 | register int L; |
| 390 | |
| 391 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 392 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 393 | + colortab[ *cb + 2*256 ]; |
| 394 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 395 | ++cr; ++cb; |
| 396 | |
| 397 | L = *lum++; |
| 398 | row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] | |
| 399 | rgb_2_pix[ L + crb_g ] | |
| 400 | rgb_2_pix[ L + cb_b ]); |
| 401 | row1++; |
| 402 | |
| 403 | L = *lum++; |
| 404 | row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] | |
| 405 | rgb_2_pix[ L + crb_g ] | |
| 406 | rgb_2_pix[ L + cb_b ]); |
| 407 | row1++; |
| 408 | |
| 409 | |
| 410 | /* Now, do second row. */ |
| 411 | |
| 412 | L = *lum2++; |
| 413 | row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] | |
| 414 | rgb_2_pix[ L + crb_g ] | |
| 415 | rgb_2_pix[ L + cb_b ]); |
| 416 | row2++; |
| 417 | |
| 418 | L = *lum2++; |
| 419 | row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] | |
| 420 | rgb_2_pix[ L + crb_g ] | |
| 421 | rgb_2_pix[ L + cb_b ]); |
| 422 | row2++; |
| 423 | } |
| 424 | |
| 425 | /* |
| 426 | * These values are at the start of the next line, (due |
| 427 | * to the ++'s above),but they need to be at the start |
| 428 | * of the line after that. |
| 429 | */ |
| 430 | lum += cols; |
| 431 | lum2 += cols; |
| 432 | row1 += mod; |
| 433 | row2 += mod; |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | static void Color24DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix, |
| 438 | unsigned char *lum, unsigned char *cr, |
| 439 | unsigned char *cb, unsigned char *out, |
| 440 | int rows, int cols, int mod ) |
| 441 | { |
| 442 | unsigned int value; |
| 443 | unsigned char* row1 = out; |
| 444 | const int next_row = (cols*2 + mod) * 3; |
| 445 | unsigned char* row2 = row1 + 2*next_row; |
| 446 | unsigned char* lum2; |
| 447 | int x, y; |
| 448 | int cr_r; |
| 449 | int crb_g; |
| 450 | int cb_b; |
| 451 | int cols_2 = cols / 2; |
| 452 | |
| 453 | lum2 = lum + cols; |
| 454 | |
| 455 | mod = next_row*3 + mod*3; |
| 456 | |
| 457 | y = rows / 2; |
| 458 | while( y-- ) |
| 459 | { |
| 460 | x = cols_2; |
| 461 | while( x-- ) |
| 462 | { |
| 463 | register int L; |
| 464 | |
| 465 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 466 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 467 | + colortab[ *cb + 2*256 ]; |
| 468 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 469 | ++cr; ++cb; |
| 470 | |
| 471 | L = *lum++; |
| 472 | value = (rgb_2_pix[ L + cr_r ] | |
| 473 | rgb_2_pix[ L + crb_g ] | |
| 474 | rgb_2_pix[ L + cb_b ]); |
| 475 | row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] = |
| 476 | (value ) & 0xFF; |
| 477 | row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] = |
| 478 | (value >> 8) & 0xFF; |
| 479 | row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] = |
| 480 | (value >> 16) & 0xFF; |
| 481 | row1 += 2*3; |
| 482 | |
| 483 | L = *lum++; |
| 484 | value = (rgb_2_pix[ L + cr_r ] | |
| 485 | rgb_2_pix[ L + crb_g ] | |
| 486 | rgb_2_pix[ L + cb_b ]); |
| 487 | row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] = |
| 488 | (value ) & 0xFF; |
| 489 | row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] = |
| 490 | (value >> 8) & 0xFF; |
| 491 | row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] = |
| 492 | (value >> 16) & 0xFF; |
| 493 | row1 += 2*3; |
| 494 | |
| 495 | |
| 496 | /* Now, do second row. */ |
| 497 | |
| 498 | L = *lum2++; |
| 499 | value = (rgb_2_pix[ L + cr_r ] | |
| 500 | rgb_2_pix[ L + crb_g ] | |
| 501 | rgb_2_pix[ L + cb_b ]); |
| 502 | row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] = |
| 503 | (value ) & 0xFF; |
| 504 | row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] = |
| 505 | (value >> 8) & 0xFF; |
| 506 | row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] = |
| 507 | (value >> 16) & 0xFF; |
| 508 | row2 += 2*3; |
| 509 | |
| 510 | L = *lum2++; |
| 511 | value = (rgb_2_pix[ L + cr_r ] | |
| 512 | rgb_2_pix[ L + crb_g ] | |
| 513 | rgb_2_pix[ L + cb_b ]); |
| 514 | row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] = |
| 515 | (value ) & 0xFF; |
| 516 | row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] = |
| 517 | (value >> 8) & 0xFF; |
| 518 | row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] = |
| 519 | (value >> 16) & 0xFF; |
| 520 | row2 += 2*3; |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * These values are at the start of the next line, (due |
| 525 | * to the ++'s above),but they need to be at the start |
| 526 | * of the line after that. |
| 527 | */ |
| 528 | lum += cols; |
| 529 | lum2 += cols; |
| 530 | row1 += mod; |
| 531 | row2 += mod; |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | static void Color32DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix, |
| 536 | unsigned char *lum, unsigned char *cr, |
| 537 | unsigned char *cb, unsigned char *out, |
| 538 | int rows, int cols, int mod ) |
| 539 | { |
| 540 | unsigned int* row1 = (unsigned int*) out; |
| 541 | const int next_row = cols*2+mod; |
| 542 | unsigned int* row2 = row1 + 2*next_row; |
| 543 | unsigned char* lum2; |
| 544 | int x, y; |
| 545 | int cr_r; |
| 546 | int crb_g; |
| 547 | int cb_b; |
| 548 | int cols_2 = cols / 2; |
| 549 | |
| 550 | lum2 = lum + cols; |
| 551 | |
| 552 | mod = (next_row * 3) + mod; |
| 553 | |
| 554 | y = rows / 2; |
| 555 | while( y-- ) |
| 556 | { |
| 557 | x = cols_2; |
| 558 | while( x-- ) |
| 559 | { |
| 560 | register int L; |
| 561 | |
| 562 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 563 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 564 | + colortab[ *cb + 2*256 ]; |
| 565 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 566 | ++cr; ++cb; |
| 567 | |
| 568 | L = *lum++; |
| 569 | row1[0] = row1[1] = row1[next_row] = row1[next_row+1] = |
| 570 | (rgb_2_pix[ L + cr_r ] | |
| 571 | rgb_2_pix[ L + crb_g ] | |
| 572 | rgb_2_pix[ L + cb_b ]); |
| 573 | row1 += 2; |
| 574 | |
| 575 | L = *lum++; |
| 576 | row1[0] = row1[1] = row1[next_row] = row1[next_row+1] = |
| 577 | (rgb_2_pix[ L + cr_r ] | |
| 578 | rgb_2_pix[ L + crb_g ] | |
| 579 | rgb_2_pix[ L + cb_b ]); |
| 580 | row1 += 2; |
| 581 | |
| 582 | |
| 583 | /* Now, do second row. */ |
| 584 | |
| 585 | L = *lum2++; |
| 586 | row2[0] = row2[1] = row2[next_row] = row2[next_row+1] = |
| 587 | (rgb_2_pix[ L + cr_r ] | |
| 588 | rgb_2_pix[ L + crb_g ] | |
| 589 | rgb_2_pix[ L + cb_b ]); |
| 590 | row2 += 2; |
| 591 | |
| 592 | L = *lum2++; |
| 593 | row2[0] = row2[1] = row2[next_row] = row2[next_row+1] = |
| 594 | (rgb_2_pix[ L + cr_r ] | |
| 595 | rgb_2_pix[ L + crb_g ] | |
| 596 | rgb_2_pix[ L + cb_b ]); |
| 597 | row2 += 2; |
| 598 | } |
| 599 | |
| 600 | /* |
| 601 | * These values are at the start of the next line, (due |
| 602 | * to the ++'s above),but they need to be at the start |
| 603 | * of the line after that. |
| 604 | */ |
| 605 | lum += cols; |
| 606 | lum2 += cols; |
| 607 | row1 += mod; |
| 608 | row2 += mod; |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | static void Color16DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix, |
| 613 | unsigned char *lum, unsigned char *cr, |
| 614 | unsigned char *cb, unsigned char *out, |
| 615 | int rows, int cols, int mod ) |
| 616 | { |
| 617 | unsigned short* row; |
| 618 | int x, y; |
| 619 | int cr_r; |
| 620 | int crb_g; |
| 621 | int cb_b; |
| 622 | int cols_2 = cols / 2; |
| 623 | |
| 624 | row = (unsigned short*) out; |
| 625 | |
| 626 | y = rows; |
| 627 | while( y-- ) |
| 628 | { |
| 629 | x = cols_2; |
| 630 | while( x-- ) |
| 631 | { |
| 632 | register int L; |
| 633 | |
| 634 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 635 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 636 | + colortab[ *cb + 2*256 ]; |
| 637 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 638 | cr += 4; cb += 4; |
| 639 | |
| 640 | L = *lum; lum += 2; |
| 641 | *row++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
| 642 | rgb_2_pix[ L + crb_g ] | |
| 643 | rgb_2_pix[ L + cb_b ]); |
| 644 | |
| 645 | L = *lum; lum += 2; |
| 646 | *row++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
| 647 | rgb_2_pix[ L + crb_g ] | |
| 648 | rgb_2_pix[ L + cb_b ]); |
| 649 | |
| 650 | } |
| 651 | |
| 652 | row += mod; |
| 653 | } |
| 654 | } |
| 655 | |
| 656 | static void Color24DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix, |
| 657 | unsigned char *lum, unsigned char *cr, |
| 658 | unsigned char *cb, unsigned char *out, |
| 659 | int rows, int cols, int mod ) |
| 660 | { |
| 661 | unsigned int value; |
| 662 | unsigned char* row; |
| 663 | int x, y; |
| 664 | int cr_r; |
| 665 | int crb_g; |
| 666 | int cb_b; |
| 667 | int cols_2 = cols / 2; |
| 668 | |
| 669 | row = (unsigned char*) out; |
| 670 | mod *= 3; |
| 671 | y = rows; |
| 672 | while( y-- ) |
| 673 | { |
| 674 | x = cols_2; |
| 675 | while( x-- ) |
| 676 | { |
| 677 | register int L; |
| 678 | |
| 679 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 680 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 681 | + colortab[ *cb + 2*256 ]; |
| 682 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 683 | cr += 4; cb += 4; |
| 684 | |
| 685 | L = *lum; lum += 2; |
| 686 | value = (rgb_2_pix[ L + cr_r ] | |
| 687 | rgb_2_pix[ L + crb_g ] | |
| 688 | rgb_2_pix[ L + cb_b ]); |
| 689 | *row++ = (value ) & 0xFF; |
| 690 | *row++ = (value >> 8) & 0xFF; |
| 691 | *row++ = (value >> 16) & 0xFF; |
| 692 | |
| 693 | L = *lum; lum += 2; |
| 694 | value = (rgb_2_pix[ L + cr_r ] | |
| 695 | rgb_2_pix[ L + crb_g ] | |
| 696 | rgb_2_pix[ L + cb_b ]); |
| 697 | *row++ = (value ) & 0xFF; |
| 698 | *row++ = (value >> 8) & 0xFF; |
| 699 | *row++ = (value >> 16) & 0xFF; |
| 700 | |
| 701 | } |
| 702 | row += mod; |
| 703 | } |
| 704 | } |
| 705 | |
| 706 | static void Color32DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix, |
| 707 | unsigned char *lum, unsigned char *cr, |
| 708 | unsigned char *cb, unsigned char *out, |
| 709 | int rows, int cols, int mod ) |
| 710 | { |
| 711 | unsigned int* row; |
| 712 | int x, y; |
| 713 | int cr_r; |
| 714 | int crb_g; |
| 715 | int cb_b; |
| 716 | int cols_2 = cols / 2; |
| 717 | |
| 718 | row = (unsigned int*) out; |
| 719 | y = rows; |
| 720 | while( y-- ) |
| 721 | { |
| 722 | x = cols_2; |
| 723 | while( x-- ) |
| 724 | { |
| 725 | register int L; |
| 726 | |
| 727 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 728 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 729 | + colortab[ *cb + 2*256 ]; |
| 730 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 731 | cr += 4; cb += 4; |
| 732 | |
| 733 | L = *lum; lum += 2; |
| 734 | *row++ = (rgb_2_pix[ L + cr_r ] | |
| 735 | rgb_2_pix[ L + crb_g ] | |
| 736 | rgb_2_pix[ L + cb_b ]); |
| 737 | |
| 738 | L = *lum; lum += 2; |
| 739 | *row++ = (rgb_2_pix[ L + cr_r ] | |
| 740 | rgb_2_pix[ L + crb_g ] | |
| 741 | rgb_2_pix[ L + cb_b ]); |
| 742 | |
| 743 | |
| 744 | } |
| 745 | row += mod; |
| 746 | } |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * In this function I make use of a nasty trick. The tables have the lower |
| 751 | * 16 bits replicated in the upper 16. This means I can write ints and get |
| 752 | * the horisontal doubling for free (almost). |
| 753 | */ |
| 754 | static void Color16DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix, |
| 755 | unsigned char *lum, unsigned char *cr, |
| 756 | unsigned char *cb, unsigned char *out, |
| 757 | int rows, int cols, int mod ) |
| 758 | { |
| 759 | unsigned int* row = (unsigned int*) out; |
| 760 | const int next_row = cols+(mod/2); |
| 761 | int x, y; |
| 762 | int cr_r; |
| 763 | int crb_g; |
| 764 | int cb_b; |
| 765 | int cols_2 = cols / 2; |
| 766 | |
| 767 | y = rows; |
| 768 | while( y-- ) |
| 769 | { |
| 770 | x = cols_2; |
| 771 | while( x-- ) |
| 772 | { |
| 773 | register int L; |
| 774 | |
| 775 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 776 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 777 | + colortab[ *cb + 2*256 ]; |
| 778 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 779 | cr += 4; cb += 4; |
| 780 | |
| 781 | L = *lum; lum += 2; |
| 782 | row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] | |
| 783 | rgb_2_pix[ L + crb_g ] | |
| 784 | rgb_2_pix[ L + cb_b ]); |
| 785 | row++; |
| 786 | |
| 787 | L = *lum; lum += 2; |
| 788 | row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] | |
| 789 | rgb_2_pix[ L + crb_g ] | |
| 790 | rgb_2_pix[ L + cb_b ]); |
| 791 | row++; |
| 792 | |
| 793 | } |
| 794 | row += next_row; |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | static void Color24DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix, |
| 799 | unsigned char *lum, unsigned char *cr, |
| 800 | unsigned char *cb, unsigned char *out, |
| 801 | int rows, int cols, int mod ) |
| 802 | { |
| 803 | unsigned int value; |
| 804 | unsigned char* row = out; |
| 805 | const int next_row = (cols*2 + mod) * 3; |
| 806 | int x, y; |
| 807 | int cr_r; |
| 808 | int crb_g; |
| 809 | int cb_b; |
| 810 | int cols_2 = cols / 2; |
| 811 | y = rows; |
| 812 | while( y-- ) |
| 813 | { |
| 814 | x = cols_2; |
| 815 | while( x-- ) |
| 816 | { |
| 817 | register int L; |
| 818 | |
| 819 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 820 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 821 | + colortab[ *cb + 2*256 ]; |
| 822 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 823 | cr += 4; cb += 4; |
| 824 | |
| 825 | L = *lum; lum += 2; |
| 826 | value = (rgb_2_pix[ L + cr_r ] | |
| 827 | rgb_2_pix[ L + crb_g ] | |
| 828 | rgb_2_pix[ L + cb_b ]); |
| 829 | row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] = |
| 830 | (value ) & 0xFF; |
| 831 | row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] = |
| 832 | (value >> 8) & 0xFF; |
| 833 | row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] = |
| 834 | (value >> 16) & 0xFF; |
| 835 | row += 2*3; |
| 836 | |
| 837 | L = *lum; lum += 2; |
| 838 | value = (rgb_2_pix[ L + cr_r ] | |
| 839 | rgb_2_pix[ L + crb_g ] | |
| 840 | rgb_2_pix[ L + cb_b ]); |
| 841 | row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] = |
| 842 | (value ) & 0xFF; |
| 843 | row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] = |
| 844 | (value >> 8) & 0xFF; |
| 845 | row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] = |
| 846 | (value >> 16) & 0xFF; |
| 847 | row += 2*3; |
| 848 | |
| 849 | } |
| 850 | row += next_row; |
| 851 | } |
| 852 | } |
| 853 | |
| 854 | static void Color32DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix, |
| 855 | unsigned char *lum, unsigned char *cr, |
| 856 | unsigned char *cb, unsigned char *out, |
| 857 | int rows, int cols, int mod ) |
| 858 | { |
| 859 | unsigned int* row = (unsigned int*) out; |
| 860 | const int next_row = cols*2+mod; |
| 861 | int x, y; |
| 862 | int cr_r; |
| 863 | int crb_g; |
| 864 | int cb_b; |
| 865 | int cols_2 = cols / 2; |
| 866 | mod+=mod; |
| 867 | y = rows; |
| 868 | while( y-- ) |
| 869 | { |
| 870 | x = cols_2; |
| 871 | while( x-- ) |
| 872 | { |
| 873 | register int L; |
| 874 | |
| 875 | cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
| 876 | crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
| 877 | + colortab[ *cb + 2*256 ]; |
| 878 | cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
| 879 | cr += 4; cb += 4; |
| 880 | |
| 881 | L = *lum; lum += 2; |
| 882 | row[0] = row[1] = row[next_row] = row[next_row+1] = |
| 883 | (rgb_2_pix[ L + cr_r ] | |
| 884 | rgb_2_pix[ L + crb_g ] | |
| 885 | rgb_2_pix[ L + cb_b ]); |
| 886 | row += 2; |
| 887 | |
| 888 | L = *lum; lum += 2; |
| 889 | row[0] = row[1] = row[next_row] = row[next_row+1] = |
| 890 | (rgb_2_pix[ L + cr_r ] | |
| 891 | rgb_2_pix[ L + crb_g ] | |
| 892 | rgb_2_pix[ L + cb_b ]); |
| 893 | row += 2; |
| 894 | |
| 895 | |
| 896 | } |
| 897 | |
| 898 | row += next_row; |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | /* |
| 903 | * How many 1 bits are there in the Uint32. |
| 904 | * Low performance, do not call often. |
| 905 | */ |
| 906 | static int number_of_bits_set( Uint32 a ) |
| 907 | { |
| 908 | if(!a) return 0; |
| 909 | if(a & 1) return 1 + number_of_bits_set(a >> 1); |
| 910 | return(number_of_bits_set(a >> 1)); |
| 911 | } |
| 912 | |
| 913 | /* |
| 914 | * How many 0 bits are there at least significant end of Uint32. |
| 915 | * Low performance, do not call often. |
| 916 | */ |
| 917 | static int free_bits_at_bottom( Uint32 a ) |
| 918 | { |
| 919 | /* assume char is 8 bits */ |
| 920 | if(!a) return sizeof(Uint32) * 8; |
| 921 | if(((Sint32)a) & 1l) return 0; |
| 922 | return 1 + free_bits_at_bottom ( a >> 1); |
| 923 | } |
| 924 | |
| 925 | |
| 926 | SDL_Overlay *SDL_CreateYUV_SW(_THIS, int width, int height, Uint32 format, SDL_Surface *display) |
| 927 | { |
| 928 | SDL_Overlay *overlay; |
| 929 | struct private_yuvhwdata *swdata; |
| 930 | int *Cr_r_tab; |
| 931 | int *Cr_g_tab; |
| 932 | int *Cb_g_tab; |
| 933 | int *Cb_b_tab; |
| 934 | Uint32 *r_2_pix_alloc; |
| 935 | Uint32 *g_2_pix_alloc; |
| 936 | Uint32 *b_2_pix_alloc; |
| 937 | int i; |
| 938 | int CR, CB; |
| 939 | Uint32 Rmask, Gmask, Bmask; |
| 940 | |
| 941 | /* Only RGB packed pixel conversion supported */ |
| 942 | if ( (display->format->BytesPerPixel != 2) && |
| 943 | (display->format->BytesPerPixel != 3) && |
| 944 | (display->format->BytesPerPixel != 4) ) { |
| 945 | SDL_SetError("Can't use YUV data on non 16/24/32 bit surfaces"); |
| 946 | return(NULL); |
| 947 | } |
| 948 | |
| 949 | /* Verify that we support the format */ |
| 950 | switch (format) { |
| 951 | case SDL_YV12_OVERLAY: |
| 952 | case SDL_IYUV_OVERLAY: |
| 953 | case SDL_YUY2_OVERLAY: |
| 954 | case SDL_UYVY_OVERLAY: |
| 955 | case SDL_YVYU_OVERLAY: |
| 956 | break; |
| 957 | default: |
| 958 | SDL_SetError("Unsupported YUV format"); |
| 959 | return(NULL); |
| 960 | } |
| 961 | |
| 962 | /* Create the overlay structure */ |
| 963 | overlay = (SDL_Overlay *)SDL_malloc(sizeof *overlay); |
| 964 | if ( overlay == NULL ) { |
| 965 | SDL_OutOfMemory(); |
| 966 | return(NULL); |
| 967 | } |
| 968 | SDL_memset(overlay, 0, (sizeof *overlay)); |
| 969 | |
| 970 | /* Fill in the basic members */ |
| 971 | overlay->format = format; |
| 972 | overlay->w = width; |
| 973 | overlay->h = height; |
| 974 | |
| 975 | /* Set up the YUV surface function structure */ |
| 976 | overlay->hwfuncs = &sw_yuvfuncs; |
| 977 | |
| 978 | /* Create the pixel data and lookup tables */ |
| 979 | swdata = (struct private_yuvhwdata *)SDL_malloc(sizeof *swdata); |
| 980 | overlay->hwdata = swdata; |
| 981 | if ( swdata == NULL ) { |
| 982 | SDL_OutOfMemory(); |
| 983 | SDL_FreeYUVOverlay(overlay); |
| 984 | return(NULL); |
| 985 | } |
| 986 | swdata->stretch = NULL; |
| 987 | swdata->display = display; |
| 988 | swdata->pixels = (Uint8 *) SDL_malloc(width*height*2); |
| 989 | swdata->colortab = (int *)SDL_malloc(4*256*sizeof(int)); |
| 990 | Cr_r_tab = &swdata->colortab[0*256]; |
| 991 | Cr_g_tab = &swdata->colortab[1*256]; |
| 992 | Cb_g_tab = &swdata->colortab[2*256]; |
| 993 | Cb_b_tab = &swdata->colortab[3*256]; |
| 994 | swdata->rgb_2_pix = (Uint32 *)SDL_malloc(3*768*sizeof(Uint32)); |
| 995 | r_2_pix_alloc = &swdata->rgb_2_pix[0*768]; |
| 996 | g_2_pix_alloc = &swdata->rgb_2_pix[1*768]; |
| 997 | b_2_pix_alloc = &swdata->rgb_2_pix[2*768]; |
| 998 | if ( ! swdata->pixels || ! swdata->colortab || ! swdata->rgb_2_pix ) { |
| 999 | SDL_OutOfMemory(); |
| 1000 | SDL_FreeYUVOverlay(overlay); |
| 1001 | return(NULL); |
| 1002 | } |
| 1003 | |
| 1004 | /* Generate the tables for the display surface */ |
| 1005 | for (i=0; i<256; i++) { |
| 1006 | /* Gamma correction (luminescence table) and chroma correction |
| 1007 | would be done here. See the Berkeley mpeg_play sources. |
| 1008 | */ |
| 1009 | CB = CR = (i-128); |
| 1010 | Cr_r_tab[i] = (int) ( (0.419/0.299) * CR); |
| 1011 | Cr_g_tab[i] = (int) (-(0.299/0.419) * CR); |
| 1012 | Cb_g_tab[i] = (int) (-(0.114/0.331) * CB); |
| 1013 | Cb_b_tab[i] = (int) ( (0.587/0.331) * CB); |
| 1014 | } |
| 1015 | |
| 1016 | /* |
| 1017 | * Set up entries 0-255 in rgb-to-pixel value tables. |
| 1018 | */ |
| 1019 | Rmask = display->format->Rmask; |
| 1020 | Gmask = display->format->Gmask; |
| 1021 | Bmask = display->format->Bmask; |
| 1022 | for ( i=0; i<256; ++i ) { |
| 1023 | r_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Rmask)); |
| 1024 | r_2_pix_alloc[i+256] <<= free_bits_at_bottom(Rmask); |
| 1025 | g_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Gmask)); |
| 1026 | g_2_pix_alloc[i+256] <<= free_bits_at_bottom(Gmask); |
| 1027 | b_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Bmask)); |
| 1028 | b_2_pix_alloc[i+256] <<= free_bits_at_bottom(Bmask); |
| 1029 | } |
| 1030 | |
| 1031 | /* |
| 1032 | * If we have 16-bit output depth, then we double the value |
| 1033 | * in the top word. This means that we can write out both |
| 1034 | * pixels in the pixel doubling mode with one op. It is |
| 1035 | * harmless in the normal case as storing a 32-bit value |
| 1036 | * through a short pointer will lose the top bits anyway. |
| 1037 | */ |
| 1038 | if( display->format->BytesPerPixel == 2 ) { |
| 1039 | for ( i=0; i<256; ++i ) { |
| 1040 | r_2_pix_alloc[i+256] |= (r_2_pix_alloc[i+256]) << 16; |
| 1041 | g_2_pix_alloc[i+256] |= (g_2_pix_alloc[i+256]) << 16; |
| 1042 | b_2_pix_alloc[i+256] |= (b_2_pix_alloc[i+256]) << 16; |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * Spread out the values we have to the rest of the array so that |
| 1048 | * we do not need to check for overflow. |
| 1049 | */ |
| 1050 | for ( i=0; i<256; ++i ) { |
| 1051 | r_2_pix_alloc[i] = r_2_pix_alloc[256]; |
| 1052 | r_2_pix_alloc[i+512] = r_2_pix_alloc[511]; |
| 1053 | g_2_pix_alloc[i] = g_2_pix_alloc[256]; |
| 1054 | g_2_pix_alloc[i+512] = g_2_pix_alloc[511]; |
| 1055 | b_2_pix_alloc[i] = b_2_pix_alloc[256]; |
| 1056 | b_2_pix_alloc[i+512] = b_2_pix_alloc[511]; |
| 1057 | } |
| 1058 | |
| 1059 | /* You have chosen wisely... */ |
| 1060 | switch (format) { |
| 1061 | case SDL_YV12_OVERLAY: |
| 1062 | case SDL_IYUV_OVERLAY: |
| 1063 | if ( display->format->BytesPerPixel == 2 ) { |
| 1064 | #if (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES |
| 1065 | /* inline assembly functions */ |
| 1066 | if ( SDL_HasMMX() && (Rmask == 0xF800) && |
| 1067 | (Gmask == 0x07E0) && |
| 1068 | (Bmask == 0x001F) && |
| 1069 | (width & 15) == 0) { |
| 1070 | /*printf("Using MMX 16-bit 565 dither\n");*/ |
| 1071 | swdata->Display1X = Color565DitherYV12MMX1X; |
| 1072 | } else { |
| 1073 | /*printf("Using C 16-bit dither\n");*/ |
| 1074 | swdata->Display1X = Color16DitherYV12Mod1X; |
| 1075 | } |
| 1076 | #else |
| 1077 | swdata->Display1X = Color16DitherYV12Mod1X; |
| 1078 | #endif |
| 1079 | swdata->Display2X = Color16DitherYV12Mod2X; |
| 1080 | } |
| 1081 | if ( display->format->BytesPerPixel == 3 ) { |
| 1082 | swdata->Display1X = Color24DitherYV12Mod1X; |
| 1083 | swdata->Display2X = Color24DitherYV12Mod2X; |
| 1084 | } |
| 1085 | if ( display->format->BytesPerPixel == 4 ) { |
| 1086 | #if (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES |
| 1087 | /* inline assembly functions */ |
| 1088 | if ( SDL_HasMMX() && (Rmask == 0x00FF0000) && |
| 1089 | (Gmask == 0x0000FF00) && |
| 1090 | (Bmask == 0x000000FF) && |
| 1091 | (width & 15) == 0) { |
| 1092 | /*printf("Using MMX 32-bit dither\n");*/ |
| 1093 | swdata->Display1X = ColorRGBDitherYV12MMX1X; |
| 1094 | } else { |
| 1095 | /*printf("Using C 32-bit dither\n");*/ |
| 1096 | swdata->Display1X = Color32DitherYV12Mod1X; |
| 1097 | } |
| 1098 | #else |
| 1099 | swdata->Display1X = Color32DitherYV12Mod1X; |
| 1100 | #endif |
| 1101 | swdata->Display2X = Color32DitherYV12Mod2X; |
| 1102 | } |
| 1103 | break; |
| 1104 | case SDL_YUY2_OVERLAY: |
| 1105 | case SDL_UYVY_OVERLAY: |
| 1106 | case SDL_YVYU_OVERLAY: |
| 1107 | if ( display->format->BytesPerPixel == 2 ) { |
| 1108 | swdata->Display1X = Color16DitherYUY2Mod1X; |
| 1109 | swdata->Display2X = Color16DitherYUY2Mod2X; |
| 1110 | } |
| 1111 | if ( display->format->BytesPerPixel == 3 ) { |
| 1112 | swdata->Display1X = Color24DitherYUY2Mod1X; |
| 1113 | swdata->Display2X = Color24DitherYUY2Mod2X; |
| 1114 | } |
| 1115 | if ( display->format->BytesPerPixel == 4 ) { |
| 1116 | swdata->Display1X = Color32DitherYUY2Mod1X; |
| 1117 | swdata->Display2X = Color32DitherYUY2Mod2X; |
| 1118 | } |
| 1119 | break; |
| 1120 | default: |
| 1121 | /* We should never get here (caught above) */ |
| 1122 | break; |
| 1123 | } |
| 1124 | |
| 1125 | /* Find the pitch and offset values for the overlay */ |
| 1126 | overlay->pitches = swdata->pitches; |
| 1127 | overlay->pixels = swdata->planes; |
| 1128 | switch (format) { |
| 1129 | case SDL_YV12_OVERLAY: |
| 1130 | case SDL_IYUV_OVERLAY: |
| 1131 | overlay->pitches[0] = overlay->w; |
| 1132 | overlay->pitches[1] = overlay->pitches[0] / 2; |
| 1133 | overlay->pitches[2] = overlay->pitches[0] / 2; |
| 1134 | overlay->pixels[0] = swdata->pixels; |
| 1135 | overlay->pixels[1] = overlay->pixels[0] + |
| 1136 | overlay->pitches[0] * overlay->h; |
| 1137 | overlay->pixels[2] = overlay->pixels[1] + |
| 1138 | overlay->pitches[1] * overlay->h / 2; |
| 1139 | overlay->planes = 3; |
| 1140 | break; |
| 1141 | case SDL_YUY2_OVERLAY: |
| 1142 | case SDL_UYVY_OVERLAY: |
| 1143 | case SDL_YVYU_OVERLAY: |
| 1144 | overlay->pitches[0] = overlay->w*2; |
| 1145 | overlay->pixels[0] = swdata->pixels; |
| 1146 | overlay->planes = 1; |
| 1147 | break; |
| 1148 | default: |
| 1149 | /* We should never get here (caught above) */ |
| 1150 | break; |
| 1151 | } |
| 1152 | |
| 1153 | /* We're all done.. */ |
| 1154 | return(overlay); |
| 1155 | } |
| 1156 | |
| 1157 | int SDL_LockYUV_SW(_THIS, SDL_Overlay *overlay) |
| 1158 | { |
| 1159 | return(0); |
| 1160 | } |
| 1161 | |
| 1162 | void SDL_UnlockYUV_SW(_THIS, SDL_Overlay *overlay) |
| 1163 | { |
| 1164 | return; |
| 1165 | } |
| 1166 | |
| 1167 | int SDL_DisplayYUV_SW(_THIS, SDL_Overlay *overlay, SDL_Rect *src, SDL_Rect *dst) |
| 1168 | { |
| 1169 | struct private_yuvhwdata *swdata; |
| 1170 | int stretch; |
| 1171 | int scale_2x; |
| 1172 | SDL_Surface *display; |
| 1173 | Uint8 *lum, *Cr, *Cb; |
| 1174 | Uint8 *dstp; |
| 1175 | int mod; |
| 1176 | |
| 1177 | swdata = overlay->hwdata; |
| 1178 | stretch = 0; |
| 1179 | scale_2x = 0; |
| 1180 | if ( src->x || src->y || src->w < overlay->w || src->h < overlay->h ) { |
| 1181 | /* The source rectangle has been clipped. |
| 1182 | Using a scratch surface is easier than adding clipped |
| 1183 | source support to all the blitters, plus that would |
| 1184 | slow them down in the general unclipped case. |
| 1185 | */ |
| 1186 | stretch = 1; |
| 1187 | } else if ( (src->w != dst->w) || (src->h != dst->h) ) { |
| 1188 | if ( (dst->w == 2*src->w) && |
| 1189 | (dst->h == 2*src->h) ) { |
| 1190 | scale_2x = 1; |
| 1191 | } else { |
| 1192 | stretch = 1; |
| 1193 | } |
| 1194 | } |
| 1195 | if ( stretch ) { |
| 1196 | if ( ! swdata->stretch ) { |
| 1197 | display = swdata->display; |
| 1198 | swdata->stretch = SDL_CreateRGBSurface( |
| 1199 | SDL_SWSURFACE, |
| 1200 | overlay->w, overlay->h, |
| 1201 | display->format->BitsPerPixel, |
| 1202 | display->format->Rmask, |
| 1203 | display->format->Gmask, |
| 1204 | display->format->Bmask, 0); |
| 1205 | if ( ! swdata->stretch ) { |
| 1206 | return(-1); |
| 1207 | } |
| 1208 | } |
| 1209 | display = swdata->stretch; |
| 1210 | } else { |
| 1211 | display = swdata->display; |
| 1212 | } |
| 1213 | switch (overlay->format) { |
| 1214 | case SDL_YV12_OVERLAY: |
| 1215 | lum = overlay->pixels[0]; |
| 1216 | Cr = overlay->pixels[1]; |
| 1217 | Cb = overlay->pixels[2]; |
| 1218 | break; |
| 1219 | case SDL_IYUV_OVERLAY: |
| 1220 | lum = overlay->pixels[0]; |
| 1221 | Cr = overlay->pixels[2]; |
| 1222 | Cb = overlay->pixels[1]; |
| 1223 | break; |
| 1224 | case SDL_YUY2_OVERLAY: |
| 1225 | lum = overlay->pixels[0]; |
| 1226 | Cr = lum + 3; |
| 1227 | Cb = lum + 1; |
| 1228 | break; |
| 1229 | case SDL_UYVY_OVERLAY: |
| 1230 | lum = overlay->pixels[0]+1; |
| 1231 | Cr = lum + 1; |
| 1232 | Cb = lum - 1; |
| 1233 | break; |
| 1234 | case SDL_YVYU_OVERLAY: |
| 1235 | lum = overlay->pixels[0]; |
| 1236 | Cr = lum + 1; |
| 1237 | Cb = lum + 3; |
| 1238 | break; |
| 1239 | default: |
| 1240 | SDL_SetError("Unsupported YUV format in blit"); |
| 1241 | return(-1); |
| 1242 | } |
| 1243 | if ( SDL_MUSTLOCK(display) ) { |
| 1244 | if ( SDL_LockSurface(display) < 0 ) { |
| 1245 | return(-1); |
| 1246 | } |
| 1247 | } |
| 1248 | if ( stretch ) { |
| 1249 | dstp = (Uint8 *)swdata->stretch->pixels; |
| 1250 | } else { |
| 1251 | dstp = (Uint8 *)display->pixels |
| 1252 | + dst->x * display->format->BytesPerPixel |
| 1253 | + dst->y * display->pitch; |
| 1254 | } |
| 1255 | mod = (display->pitch / display->format->BytesPerPixel); |
| 1256 | |
| 1257 | if ( scale_2x ) { |
| 1258 | mod -= (overlay->w * 2); |
| 1259 | swdata->Display2X(swdata->colortab, swdata->rgb_2_pix, |
| 1260 | lum, Cr, Cb, dstp, overlay->h, overlay->w, mod); |
| 1261 | } else { |
| 1262 | mod -= overlay->w; |
| 1263 | swdata->Display1X(swdata->colortab, swdata->rgb_2_pix, |
| 1264 | lum, Cr, Cb, dstp, overlay->h, overlay->w, mod); |
| 1265 | } |
| 1266 | if ( SDL_MUSTLOCK(display) ) { |
| 1267 | SDL_UnlockSurface(display); |
| 1268 | } |
| 1269 | if ( stretch ) { |
| 1270 | display = swdata->display; |
| 1271 | SDL_SoftStretch(swdata->stretch, src, display, dst); |
| 1272 | } |
| 1273 | SDL_UpdateRects(display, 1, dst); |
| 1274 | |
| 1275 | return(0); |
| 1276 | } |
| 1277 | |
| 1278 | void SDL_FreeYUV_SW(_THIS, SDL_Overlay *overlay) |
| 1279 | { |
| 1280 | struct private_yuvhwdata *swdata; |
| 1281 | |
| 1282 | swdata = overlay->hwdata; |
| 1283 | if ( swdata ) { |
| 1284 | if ( swdata->stretch ) { |
| 1285 | SDL_FreeSurface(swdata->stretch); |
| 1286 | } |
| 1287 | if ( swdata->pixels ) { |
| 1288 | SDL_free(swdata->pixels); |
| 1289 | } |
| 1290 | if ( swdata->colortab ) { |
| 1291 | SDL_free(swdata->colortab); |
| 1292 | } |
| 1293 | if ( swdata->rgb_2_pix ) { |
| 1294 | SDL_free(swdata->rgb_2_pix); |
| 1295 | } |
| 1296 | SDL_free(swdata); |
| 1297 | overlay->hwdata = NULL; |
| 1298 | } |
| 1299 | } |