1 /* $Id: tif_pixarlog.c,v 1.39 2012-12-10 17:27:13 tgl Exp $ */ 2 3 /* 4 * Copyright (c) 1996-1997 Sam Leffler 5 * Copyright (c) 1996 Pixar 6 * 7 * Permission to use, copy, modify, distribute, and sell this software and 8 * its documentation for any purpose is hereby granted without fee, provided 9 * that (i) the above copyright notices and this permission notice appear in 10 * all copies of the software and related documentation, and (ii) the names of 11 * Pixar, Sam Leffler and Silicon Graphics may not be used in any advertising or 12 * publicity relating to the software without the specific, prior written 13 * permission of Pixar, Sam Leffler and Silicon Graphics. 14 * 15 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 16 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 17 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 18 * 19 * IN NO EVENT SHALL PIXAR, SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR 20 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, 21 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 22 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 23 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 24 * OF THIS SOFTWARE. 25 */ 26 27 #include "tiffiop.h" 28 #ifdef PIXARLOG_SUPPORT 29 30 /* 31 * TIFF Library. 32 * PixarLog Compression Support 33 * 34 * Contributed by Dan McCoy. 35 * 36 * PixarLog film support uses the TIFF library to store companded 37 * 11 bit values into a tiff file, which are compressed using the 38 * zip compressor. 39 * 40 * The codec can take as input and produce as output 32-bit IEEE float values 41 * as well as 16-bit or 8-bit unsigned integer values. 42 * 43 * On writing any of the above are converted into the internal 44 * 11-bit log format. In the case of 8 and 16 bit values, the 45 * input is assumed to be unsigned linear color values that represent 46 * the range 0-1. In the case of IEEE values, the 0-1 range is assumed to 47 * be the normal linear color range, in addition over 1 values are 48 * accepted up to a value of about 25.0 to encode "hot" hightlights and such. 49 * The encoding is lossless for 8-bit values, slightly lossy for the 50 * other bit depths. The actual color precision should be better 51 * than the human eye can perceive with extra room to allow for 52 * error introduced by further image computation. As with any quantized 53 * color format, it is possible to perform image calculations which 54 * expose the quantization error. This format should certainly be less 55 * susceptable to such errors than standard 8-bit encodings, but more 56 * susceptable than straight 16-bit or 32-bit encodings. 57 * 58 * On reading the internal format is converted to the desired output format. 59 * The program can request which format it desires by setting the internal 60 * pseudo tag TIFFTAG_PIXARLOGDATAFMT to one of these possible values: 61 * PIXARLOGDATAFMT_FLOAT = provide IEEE float values. 62 * PIXARLOGDATAFMT_16BIT = provide unsigned 16-bit integer values 63 * PIXARLOGDATAFMT_8BIT = provide unsigned 8-bit integer values 64 * 65 * alternately PIXARLOGDATAFMT_8BITABGR provides unsigned 8-bit integer 66 * values with the difference that if there are exactly three or four channels 67 * (rgb or rgba) it swaps the channel order (bgr or abgr). 68 * 69 * PIXARLOGDATAFMT_11BITLOG provides the internal encoding directly 70 * packed in 16-bit values. However no tools are supplied for interpreting 71 * these values. 72 * 73 * "hot" (over 1.0) areas written in floating point get clamped to 74 * 1.0 in the integer data types. 75 * 76 * When the file is closed after writing, the bit depth and sample format 77 * are set always to appear as if 8-bit data has been written into it. 78 * That way a naive program unaware of the particulars of the encoding 79 * gets the format it is most likely able to handle. 80 * 81 * The codec does it's own horizontal differencing step on the coded 82 * values so the libraries predictor stuff should be turned off. 83 * The codec also handle byte swapping the encoded values as necessary 84 * since the library does not have the information necessary 85 * to know the bit depth of the raw unencoded buffer. 86 * 87 * NOTE: This decoder does not appear to update tif_rawcp, and tif_rawcc. 88 * This can cause problems with the implementation of CHUNKY_STRIP_READ_SUPPORT 89 * as noted in http://trac.osgeo.org/gdal/ticket/3894. FrankW - Jan'11 90 */ 91 92 #include "tif_predict.h" 93 #include "../zlib_v128/zlib.h" 94 95 #include <stdio.h> 96 #include <stdlib.h> 97 #include <math.h> 98 99 /* Tables for converting to/from 11 bit coded values */ 100 101 #define TSIZE 2048 /* decode table size (11-bit tokens) */ 102 #define TSIZEP1 2049 /* Plus one for slop */ 103 #define ONE 1250 /* token value of 1.0 exactly */ 104 #define RATIO 1.004 /* nominal ratio for log part */ 105 106 #define CODE_MASK 0x7ff /* 11 bits. */ 107 108 static float Fltsize; 109 static float LogK1, LogK2; 110 111 #define REPEAT(n, op) { int i; i=n; do { i--; op; } while (i>0); } 112 113 static void 114 horizontalAccumulateF(uint16 *wp, int n, int stride, float *op, 115 float *ToLinearF) 116 { 117 register unsigned int cr, cg, cb, ca, mask; 118 register float t0, t1, t2, t3; 119 120 if (n >= stride) { 121 mask = CODE_MASK; 122 if (stride == 3) { 123 t0 = ToLinearF[cr = (wp[0] & mask)]; 124 t1 = ToLinearF[cg = (wp[1] & mask)]; 125 t2 = ToLinearF[cb = (wp[2] & mask)]; 126 op[0] = t0; 127 op[1] = t1; 128 op[2] = t2; 129 n -= 3; 130 while (n > 0) { 131 wp += 3; 132 op += 3; 133 n -= 3; 134 t0 = ToLinearF[(cr += wp[0]) & mask]; 135 t1 = ToLinearF[(cg += wp[1]) & mask]; 136 t2 = ToLinearF[(cb += wp[2]) & mask]; 137 op[0] = t0; 138 op[1] = t1; 139 op[2] = t2; 140 } 141 } else if (stride == 4) { 142 t0 = ToLinearF[cr = (wp[0] & mask)]; 143 t1 = ToLinearF[cg = (wp[1] & mask)]; 144 t2 = ToLinearF[cb = (wp[2] & mask)]; 145 t3 = ToLinearF[ca = (wp[3] & mask)]; 146 op[0] = t0; 147 op[1] = t1; 148 op[2] = t2; 149 op[3] = t3; 150 n -= 4; 151 while (n > 0) { 152 wp += 4; 153 op += 4; 154 n -= 4; 155 t0 = ToLinearF[(cr += wp[0]) & mask]; 156 t1 = ToLinearF[(cg += wp[1]) & mask]; 157 t2 = ToLinearF[(cb += wp[2]) & mask]; 158 t3 = ToLinearF[(ca += wp[3]) & mask]; 159 op[0] = t0; 160 op[1] = t1; 161 op[2] = t2; 162 op[3] = t3; 163 } 164 } else { 165 REPEAT(stride, *op = ToLinearF[*wp&mask]; wp++; op++) 166 n -= stride; 167 while (n > 0) { 168 REPEAT(stride, 169 wp[stride] += *wp; *op = ToLinearF[*wp&mask]; wp++; op++) 170 n -= stride; 171 } 172 } 173 } 174 } 175 176 static void 177 horizontalAccumulate12(uint16 *wp, int n, int stride, int16 *op, 178 float *ToLinearF) 179 { 180 register unsigned int cr, cg, cb, ca, mask; 181 register float t0, t1, t2, t3; 182 183 #define SCALE12 2048.0F 184 #define CLAMP12(t) (((t) < 3071) ? (uint16) (t) : 3071) 185 186 if (n >= stride) { 187 mask = CODE_MASK; 188 if (stride == 3) { 189 t0 = ToLinearF[cr = (wp[0] & mask)] * SCALE12; 190 t1 = ToLinearF[cg = (wp[1] & mask)] * SCALE12; 191 t2 = ToLinearF[cb = (wp[2] & mask)] * SCALE12; 192 op[0] = CLAMP12(t0); 193 op[1] = CLAMP12(t1); 194 op[2] = CLAMP12(t2); 195 n -= 3; 196 while (n > 0) { 197 wp += 3; 198 op += 3; 199 n -= 3; 200 t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12; 201 t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12; 202 t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12; 203 op[0] = CLAMP12(t0); 204 op[1] = CLAMP12(t1); 205 op[2] = CLAMP12(t2); 206 } 207 } else if (stride == 4) { 208 t0 = ToLinearF[cr = (wp[0] & mask)] * SCALE12; 209 t1 = ToLinearF[cg = (wp[1] & mask)] * SCALE12; 210 t2 = ToLinearF[cb = (wp[2] & mask)] * SCALE12; 211 t3 = ToLinearF[ca = (wp[3] & mask)] * SCALE12; 212 op[0] = CLAMP12(t0); 213 op[1] = CLAMP12(t1); 214 op[2] = CLAMP12(t2); 215 op[3] = CLAMP12(t3); 216 n -= 4; 217 while (n > 0) { 218 wp += 4; 219 op += 4; 220 n -= 4; 221 t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12; 222 t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12; 223 t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12; 224 t3 = ToLinearF[(ca += wp[3]) & mask] * SCALE12; 225 op[0] = CLAMP12(t0); 226 op[1] = CLAMP12(t1); 227 op[2] = CLAMP12(t2); 228 op[3] = CLAMP12(t3); 229 } 230 } else { 231 REPEAT(stride, t0 = ToLinearF[*wp&mask] * SCALE12; 232 *op = CLAMP12(t0); wp++; op++) 233 n -= stride; 234 while (n > 0) { 235 REPEAT(stride, 236 wp[stride] += *wp; t0 = ToLinearF[wp[stride]&mask]*SCALE12; 237 *op = CLAMP12(t0); wp++; op++) 238 n -= stride; 239 } 240 } 241 } 242 } 243 244 static void 245 horizontalAccumulate16(uint16 *wp, int n, int stride, uint16 *op, 246 uint16 *ToLinear16) 247 { 248 register unsigned int cr, cg, cb, ca, mask; 249 250 if (n >= stride) { 251 mask = CODE_MASK; 252 if (stride == 3) { 253 op[0] = ToLinear16[cr = (wp[0] & mask)]; 254 op[1] = ToLinear16[cg = (wp[1] & mask)]; 255 op[2] = ToLinear16[cb = (wp[2] & mask)]; 256 n -= 3; 257 while (n > 0) { 258 wp += 3; 259 op += 3; 260 n -= 3; 261 op[0] = ToLinear16[(cr += wp[0]) & mask]; 262 op[1] = ToLinear16[(cg += wp[1]) & mask]; 263 op[2] = ToLinear16[(cb += wp[2]) & mask]; 264 } 265 } else if (stride == 4) { 266 op[0] = ToLinear16[cr = (wp[0] & mask)]; 267 op[1] = ToLinear16[cg = (wp[1] & mask)]; 268 op[2] = ToLinear16[cb = (wp[2] & mask)]; 269 op[3] = ToLinear16[ca = (wp[3] & mask)]; 270 n -= 4; 271 while (n > 0) { 272 wp += 4; 273 op += 4; 274 n -= 4; 275 op[0] = ToLinear16[(cr += wp[0]) & mask]; 276 op[1] = ToLinear16[(cg += wp[1]) & mask]; 277 op[2] = ToLinear16[(cb += wp[2]) & mask]; 278 op[3] = ToLinear16[(ca += wp[3]) & mask]; 279 } 280 } else { 281 REPEAT(stride, *op = ToLinear16[*wp&mask]; wp++; op++) 282 n -= stride; 283 while (n > 0) { 284 REPEAT(stride, 285 wp[stride] += *wp; *op = ToLinear16[*wp&mask]; wp++; op++) 286 n -= stride; 287 } 288 } 289 } 290 } 291 292 /* 293 * Returns the log encoded 11-bit values with the horizontal 294 * differencing undone. 295 */ 296 static void 297 horizontalAccumulate11(uint16 *wp, int n, int stride, uint16 *op) 298 { 299 register unsigned int cr, cg, cb, ca, mask; 300 301 if (n >= stride) { 302 mask = CODE_MASK; 303 if (stride == 3) { 304 op[0] = cr = wp[0]; op[1] = cg = wp[1]; op[2] = cb = wp[2]; 305 n -= 3; 306 while (n > 0) { 307 wp += 3; 308 op += 3; 309 n -= 3; 310 op[0] = (cr += wp[0]) & mask; 311 op[1] = (cg += wp[1]) & mask; 312 op[2] = (cb += wp[2]) & mask; 313 } 314 } else if (stride == 4) { 315 op[0] = cr = wp[0]; op[1] = cg = wp[1]; 316 op[2] = cb = wp[2]; op[3] = ca = wp[3]; 317 n -= 4; 318 while (n > 0) { 319 wp += 4; 320 op += 4; 321 n -= 4; 322 op[0] = (cr += wp[0]) & mask; 323 op[1] = (cg += wp[1]) & mask; 324 op[2] = (cb += wp[2]) & mask; 325 op[3] = (ca += wp[3]) & mask; 326 } 327 } else { 328 REPEAT(stride, *op = *wp&mask; wp++; op++) 329 n -= stride; 330 while (n > 0) { 331 REPEAT(stride, 332 wp[stride] += *wp; *op = *wp&mask; wp++; op++) 333 n -= stride; 334 } 335 } 336 } 337 } 338 339 static void 340 horizontalAccumulate8(uint16 *wp, int n, int stride, unsigned char *op, 341 unsigned char *ToLinear8) 342 { 343 register unsigned int cr, cg, cb, ca, mask; 344 345 if (n >= stride) { 346 mask = CODE_MASK; 347 if (stride == 3) { 348 op[0] = ToLinear8[cr = (wp[0] & mask)]; 349 op[1] = ToLinear8[cg = (wp[1] & mask)]; 350 op[2] = ToLinear8[cb = (wp[2] & mask)]; 351 n -= 3; 352 while (n > 0) { 353 n -= 3; 354 wp += 3; 355 op += 3; 356 op[0] = ToLinear8[(cr += wp[0]) & mask]; 357 op[1] = ToLinear8[(cg += wp[1]) & mask]; 358 op[2] = ToLinear8[(cb += wp[2]) & mask]; 359 } 360 } else if (stride == 4) { 361 op[0] = ToLinear8[cr = (wp[0] & mask)]; 362 op[1] = ToLinear8[cg = (wp[1] & mask)]; 363 op[2] = ToLinear8[cb = (wp[2] & mask)]; 364 op[3] = ToLinear8[ca = (wp[3] & mask)]; 365 n -= 4; 366 while (n > 0) { 367 n -= 4; 368 wp += 4; 369 op += 4; 370 op[0] = ToLinear8[(cr += wp[0]) & mask]; 371 op[1] = ToLinear8[(cg += wp[1]) & mask]; 372 op[2] = ToLinear8[(cb += wp[2]) & mask]; 373 op[3] = ToLinear8[(ca += wp[3]) & mask]; 374 } 375 } else { 376 REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++) 377 n -= stride; 378 while (n > 0) { 379 REPEAT(stride, 380 wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++) 381 n -= stride; 382 } 383 } 384 } 385 } 386 387 388 static void 389 horizontalAccumulate8abgr(uint16 *wp, int n, int stride, unsigned char *op, 390 unsigned char *ToLinear8) 391 { 392 register unsigned int cr, cg, cb, ca, mask; 393 register unsigned char t0, t1, t2, t3; 394 395 if (n >= stride) { 396 mask = CODE_MASK; 397 if (stride == 3) { 398 op[0] = 0; 399 t1 = ToLinear8[cb = (wp[2] & mask)]; 400 t2 = ToLinear8[cg = (wp[1] & mask)]; 401 t3 = ToLinear8[cr = (wp[0] & mask)]; 402 op[1] = t1; 403 op[2] = t2; 404 op[3] = t3; 405 n -= 3; 406 while (n > 0) { 407 n -= 3; 408 wp += 3; 409 op += 4; 410 op[0] = 0; 411 t1 = ToLinear8[(cb += wp[2]) & mask]; 412 t2 = ToLinear8[(cg += wp[1]) & mask]; 413 t3 = ToLinear8[(cr += wp[0]) & mask]; 414 op[1] = t1; 415 op[2] = t2; 416 op[3] = t3; 417 } 418 } else if (stride == 4) { 419 t0 = ToLinear8[ca = (wp[3] & mask)]; 420 t1 = ToLinear8[cb = (wp[2] & mask)]; 421 t2 = ToLinear8[cg = (wp[1] & mask)]; 422 t3 = ToLinear8[cr = (wp[0] & mask)]; 423 op[0] = t0; 424 op[1] = t1; 425 op[2] = t2; 426 op[3] = t3; 427 n -= 4; 428 while (n > 0) { 429 n -= 4; 430 wp += 4; 431 op += 4; 432 t0 = ToLinear8[(ca += wp[3]) & mask]; 433 t1 = ToLinear8[(cb += wp[2]) & mask]; 434 t2 = ToLinear8[(cg += wp[1]) & mask]; 435 t3 = ToLinear8[(cr += wp[0]) & mask]; 436 op[0] = t0; 437 op[1] = t1; 438 op[2] = t2; 439 op[3] = t3; 440 } 441 } else { 442 REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++) 443 n -= stride; 444 while (n > 0) { 445 REPEAT(stride, 446 wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++) 447 n -= stride; 448 } 449 } 450 } 451 } 452 453 /* 454 * State block for each open TIFF 455 * file using PixarLog compression/decompression. 456 */ 457 typedef struct { 458 TIFFPredictorState predict; 459 z_stream stream; 460 uint16 *tbuf; 461 uint16 stride; 462 int state; 463 int user_datafmt; 464 int quality; 465 #define PLSTATE_INIT 1 466 467 TIFFVSetMethod vgetparent; /* super-class method */ 468 TIFFVSetMethod vsetparent; /* super-class method */ 469 470 float *ToLinearF; 471 uint16 *ToLinear16; 472 unsigned char *ToLinear8; 473 uint16 *FromLT2; 474 uint16 *From14; /* Really for 16-bit data, but we shift down 2 */ 475 uint16 *From8; 476 477 } PixarLogState; 478 479 static int 480 PixarLogMakeTables(PixarLogState *sp) 481 { 482 483 /* 484 * We make several tables here to convert between various external 485 * representations (float, 16-bit, and 8-bit) and the internal 486 * 11-bit companded representation. The 11-bit representation has two 487 * distinct regions. A linear bottom end up through .018316 in steps 488 * of about .000073, and a region of constant ratio up to about 25. 489 * These floating point numbers are stored in the main table ToLinearF. 490 * All other tables are derived from this one. The tables (and the 491 * ratios) are continuous at the internal seam. 492 */ 493 494 int nlin, lt2size; 495 int i, j; 496 double b, c, linstep, v; 497 float *ToLinearF; 498 uint16 *ToLinear16; 499 unsigned char *ToLinear8; 500 uint16 *FromLT2; 501 uint16 *From14; /* Really for 16-bit data, but we shift down 2 */ 502 uint16 *From8; 503 504 c = log(RATIO); 505 nlin = (int)(1./c); /* nlin must be an integer */ 506 c = 1./nlin; 507 b = exp(-c*ONE); /* multiplicative scale factor [b*exp(c*ONE) = 1] */ 508 linstep = b*c*exp(1.); 509 510 LogK1 = (float)(1./c); /* if (v >= 2) token = k1*log(v*k2) */ 511 LogK2 = (float)(1./b); 512 lt2size = (int)(2./linstep) + 1; 513 FromLT2 = (uint16 *)_TIFFmalloc(lt2size*sizeof(uint16)); 514 From14 = (uint16 *)_TIFFmalloc(16384*sizeof(uint16)); 515 From8 = (uint16 *)_TIFFmalloc(256*sizeof(uint16)); 516 ToLinearF = (float *)_TIFFmalloc(TSIZEP1 * sizeof(float)); 517 ToLinear16 = (uint16 *)_TIFFmalloc(TSIZEP1 * sizeof(uint16)); 518 ToLinear8 = (unsigned char *)_TIFFmalloc(TSIZEP1 * sizeof(unsigned char)); 519 if (FromLT2 == NULL || From14 == NULL || From8 == NULL || 520 ToLinearF == NULL || ToLinear16 == NULL || ToLinear8 == NULL) { 521 if (FromLT2) _TIFFfree(FromLT2); 522 if (From14) _TIFFfree(From14); 523 if (From8) _TIFFfree(From8); 524 if (ToLinearF) _TIFFfree(ToLinearF); 525 if (ToLinear16) _TIFFfree(ToLinear16); 526 if (ToLinear8) _TIFFfree(ToLinear8); 527 sp->FromLT2 = NULL; 528 sp->From14 = NULL; 529 sp->From8 = NULL; 530 sp->ToLinearF = NULL; 531 sp->ToLinear16 = NULL; 532 sp->ToLinear8 = NULL; 533 return 0; 534 } 535 536 j = 0; 537 538 for (i = 0; i < nlin; i++) { 539 v = i * linstep; 540 ToLinearF[j++] = (float)v; 541 } 542 543 for (i = nlin; i < TSIZE; i++) 544 ToLinearF[j++] = (float)(b*exp(c*i)); 545 546 ToLinearF[2048] = ToLinearF[2047]; 547 548 for (i = 0; i < TSIZEP1; i++) { 549 v = ToLinearF[i]*65535.0 + 0.5; 550 ToLinear16[i] = (v > 65535.0) ? 65535 : (uint16)v; 551 v = ToLinearF[i]*255.0 + 0.5; 552 ToLinear8[i] = (v > 255.0) ? 255 : (unsigned char)v; 553 } 554 555 j = 0; 556 for (i = 0; i < lt2size; i++) { 557 if ((i*linstep)*(i*linstep) > ToLinearF[j]*ToLinearF[j+1]) 558 j++; 559 FromLT2[i] = j; 560 } 561 562 /* 563 * Since we lose info anyway on 16-bit data, we set up a 14-bit 564 * table and shift 16-bit values down two bits on input. 565 * saves a little table space. 566 */ 567 j = 0; 568 for (i = 0; i < 16384; i++) { 569 while ((i/16383.)*(i/16383.) > ToLinearF[j]*ToLinearF[j+1]) 570 j++; 571 From14[i] = j; 572 } 573 574 j = 0; 575 for (i = 0; i < 256; i++) { 576 while ((i/255.)*(i/255.) > ToLinearF[j]*ToLinearF[j+1]) 577 j++; 578 From8[i] = j; 579 } 580 581 Fltsize = (float)(lt2size/2); 582 583 sp->ToLinearF = ToLinearF; 584 sp->ToLinear16 = ToLinear16; 585 sp->ToLinear8 = ToLinear8; 586 sp->FromLT2 = FromLT2; 587 sp->From14 = From14; 588 sp->From8 = From8; 589 590 return 1; 591 } 592 593 #define DecoderState(tif) ((PixarLogState*) (tif)->tif_data) 594 #define EncoderState(tif) ((PixarLogState*) (tif)->tif_data) 595 596 static int PixarLogEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s); 597 static int PixarLogDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s); 598 599 #define PIXARLOGDATAFMT_UNKNOWN -1 600 601 static int 602 PixarLogGuessDataFmt(TIFFDirectory *td) 603 { 604 int guess = PIXARLOGDATAFMT_UNKNOWN; 605 int format = td->td_sampleformat; 606 607 /* If the user didn't tell us his datafmt, 608 * take our best guess from the bitspersample. 609 */ 610 switch (td->td_bitspersample) { 611 case 32: 612 if (format == SAMPLEFORMAT_IEEEFP) 613 guess = PIXARLOGDATAFMT_FLOAT; 614 break; 615 case 16: 616 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT) 617 guess = PIXARLOGDATAFMT_16BIT; 618 break; 619 case 12: 620 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_INT) 621 guess = PIXARLOGDATAFMT_12BITPICIO; 622 break; 623 case 11: 624 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT) 625 guess = PIXARLOGDATAFMT_11BITLOG; 626 break; 627 case 8: 628 if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT) 629 guess = PIXARLOGDATAFMT_8BIT; 630 break; 631 } 632 633 return guess; 634 } 635 636 static tmsize_t 637 multiply_ms(tmsize_t m1, tmsize_t m2) 638 { 639 tmsize_t bytes = m1 * m2; 640 641 if (m1 && bytes / m1 != m2) 642 bytes = 0; 643 644 return bytes; 645 } 646 647 static tmsize_t 648 add_ms(tmsize_t m1, tmsize_t m2) 649 { 650 tmsize_t bytes = m1 + m2; 651 652 /* if either input is zero, assume overflow already occurred */ 653 if (m1 == 0 || m2 == 0) 654 bytes = 0; 655 else if (bytes <= m1 || bytes <= m2) 656 bytes = 0; 657 658 return bytes; 659 } 660 661 static int 662 PixarLogFixupTags(TIFF* tif) 663 { 664 (void) tif; 665 return (1); 666 } 667 668 static int 669 PixarLogSetupDecode(TIFF* tif) 670 { 671 static const char module[] = "PixarLogSetupDecode"; 672 TIFFDirectory *td = &tif->tif_dir; 673 PixarLogState* sp = DecoderState(tif); 674 tmsize_t tbuf_size; 675 676 assert(sp != NULL); 677 678 /* Make sure no byte swapping happens on the data 679 * after decompression. */ 680 tif->tif_postdecode = _TIFFNoPostDecode; 681 682 /* for some reason, we can't do this in TIFFInitPixarLog */ 683 684 sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ? 685 td->td_samplesperpixel : 1); 686 tbuf_size = multiply_ms(multiply_ms(multiply_ms(sp->stride, td->td_imagewidth), 687 td->td_rowsperstrip), sizeof(uint16)); 688 /* add one more stride in case input ends mid-stride */ 689 tbuf_size = add_ms(tbuf_size, sizeof(uint16) * sp->stride); 690 if (tbuf_size == 0) 691 return (0); /* TODO: this is an error return without error report through TIFFErrorExt */ 692 sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size); 693 if (sp->tbuf == NULL) 694 return (0); 695 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) 696 sp->user_datafmt = PixarLogGuessDataFmt(td); 697 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) { 698 TIFFErrorExt(tif->tif_clientdata, module, 699 "PixarLog compression can't handle bits depth/data format combination (depth: %d)", 700 td->td_bitspersample); 701 return (0); 702 } 703 704 if (inflateInit(&sp->stream) != Z_OK) { 705 TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg); 706 return (0); 707 } else { 708 sp->state |= PLSTATE_INIT; 709 return (1); 710 } 711 } 712 713 /* 714 * Setup state for decoding a strip. 715 */ 716 static int 717 PixarLogPreDecode(TIFF* tif, uint16 s) 718 { 719 static const char module[] = "PixarLogPreDecode"; 720 PixarLogState* sp = DecoderState(tif); 721 722 (void) s; 723 assert(sp != NULL); 724 sp->stream.next_in = tif->tif_rawdata; 725 assert(sizeof(sp->stream.avail_in)==4); /* if this assert gets raised, 726 we need to simplify this code to reflect a ZLib that is likely updated 727 to deal with 8byte memory sizes, though this code will respond 728 apropriately even before we simplify it */ 729 sp->stream.avail_in = (uInt) tif->tif_rawcc; 730 if ((tmsize_t)sp->stream.avail_in != tif->tif_rawcc) 731 { 732 TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size"); 733 return (0); 734 } 735 return (inflateReset(&sp->stream) == Z_OK); 736 } 737 738 static int 739 PixarLogDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s) 740 { 741 static const char module[] = "PixarLogDecode"; 742 TIFFDirectory *td = &tif->tif_dir; 743 PixarLogState* sp = DecoderState(tif); 744 tmsize_t i; 745 tmsize_t nsamples; 746 int llen; 747 uint16 *up; 748 749 switch (sp->user_datafmt) { 750 case PIXARLOGDATAFMT_FLOAT: 751 nsamples = occ / sizeof(float); /* XXX float == 32 bits */ 752 break; 753 case PIXARLOGDATAFMT_16BIT: 754 case PIXARLOGDATAFMT_12BITPICIO: 755 case PIXARLOGDATAFMT_11BITLOG: 756 nsamples = occ / sizeof(uint16); /* XXX uint16 == 16 bits */ 757 break; 758 case PIXARLOGDATAFMT_8BIT: 759 case PIXARLOGDATAFMT_8BITABGR: 760 nsamples = occ; 761 break; 762 default: 763 TIFFErrorExt(tif->tif_clientdata, module, 764 "%d bit input not supported in PixarLog", 765 td->td_bitspersample); 766 return 0; 767 } 768 769 llen = sp->stride * td->td_imagewidth; 770 771 (void) s; 772 assert(sp != NULL); 773 sp->stream.next_out = (unsigned char *) sp->tbuf; 774 assert(sizeof(sp->stream.avail_out)==4); /* if this assert gets raised, 775 we need to simplify this code to reflect a ZLib that is likely updated 776 to deal with 8byte memory sizes, though this code will respond 777 apropriately even before we simplify it */ 778 sp->stream.avail_out = (uInt) (nsamples * sizeof(uint16)); 779 if (sp->stream.avail_out != nsamples * sizeof(uint16)) 780 { 781 TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size"); 782 return (0); 783 } 784 do { 785 int state = inflate(&sp->stream, Z_PARTIAL_FLUSH); 786 if (state == Z_STREAM_END) { 787 break; /* XXX */ 788 } 789 if (state == Z_DATA_ERROR) { 790 TIFFErrorExt(tif->tif_clientdata, module, 791 "Decoding error at scanline %lu, %s", 792 (unsigned long) tif->tif_row, sp->stream.msg); 793 if (inflateSync(&sp->stream) != Z_OK) 794 return (0); 795 continue; 796 } 797 if (state != Z_OK) { 798 TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s", 799 sp->stream.msg); 800 return (0); 801 } 802 } while (sp->stream.avail_out > 0); 803 804 /* hopefully, we got all the bytes we needed */ 805 if (sp->stream.avail_out != 0) { 806 TIFFErrorExt(tif->tif_clientdata, module, 807 "Not enough data at scanline %lu (short " TIFF_UINT64_FORMAT " bytes)", 808 (unsigned long) tif->tif_row, (TIFF_UINT64_T) sp->stream.avail_out); 809 return (0); 810 } 811 812 up = sp->tbuf; 813 /* Swap bytes in the data if from a different endian machine. */ 814 if (tif->tif_flags & TIFF_SWAB) 815 TIFFSwabArrayOfShort(up, nsamples); 816 817 /* 818 * if llen is not an exact multiple of nsamples, the decode operation 819 * may overflow the output buffer, so truncate it enough to prevent 820 * that but still salvage as much data as possible. 821 */ 822 if (nsamples % llen) { 823 TIFFWarningExt(tif->tif_clientdata, module, 824 "stride %lu is not a multiple of sample count, " 825 "%lu, data truncated.", (unsigned long) llen, (unsigned long) nsamples); 826 nsamples -= nsamples % llen; 827 } 828 829 for (i = 0; i < nsamples; i += llen, up += llen) { 830 switch (sp->user_datafmt) { 831 case PIXARLOGDATAFMT_FLOAT: 832 horizontalAccumulateF(up, llen, sp->stride, 833 (float *)op, sp->ToLinearF); 834 op += llen * sizeof(float); 835 break; 836 case PIXARLOGDATAFMT_16BIT: 837 horizontalAccumulate16(up, llen, sp->stride, 838 (uint16 *)op, sp->ToLinear16); 839 op += llen * sizeof(uint16); 840 break; 841 case PIXARLOGDATAFMT_12BITPICIO: 842 horizontalAccumulate12(up, llen, sp->stride, 843 (int16 *)op, sp->ToLinearF); 844 op += llen * sizeof(int16); 845 break; 846 case PIXARLOGDATAFMT_11BITLOG: 847 horizontalAccumulate11(up, llen, sp->stride, 848 (uint16 *)op); 849 op += llen * sizeof(uint16); 850 break; 851 case PIXARLOGDATAFMT_8BIT: 852 horizontalAccumulate8(up, llen, sp->stride, 853 (unsigned char *)op, sp->ToLinear8); 854 op += llen * sizeof(unsigned char); 855 break; 856 case PIXARLOGDATAFMT_8BITABGR: 857 horizontalAccumulate8abgr(up, llen, sp->stride, 858 (unsigned char *)op, sp->ToLinear8); 859 op += llen * sizeof(unsigned char); 860 break; 861 default: 862 TIFFErrorExt(tif->tif_clientdata, module, 863 "Unsupported bits/sample: %d", 864 td->td_bitspersample); 865 return (0); 866 } 867 } 868 869 return (1); 870 } 871 872 static int 873 PixarLogSetupEncode(TIFF* tif) 874 { 875 static const char module[] = "PixarLogSetupEncode"; 876 TIFFDirectory *td = &tif->tif_dir; 877 PixarLogState* sp = EncoderState(tif); 878 tmsize_t tbuf_size; 879 880 assert(sp != NULL); 881 882 /* for some reason, we can't do this in TIFFInitPixarLog */ 883 884 sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ? 885 td->td_samplesperpixel : 1); 886 tbuf_size = multiply_ms(multiply_ms(multiply_ms(sp->stride, td->td_imagewidth), 887 td->td_rowsperstrip), sizeof(uint16)); 888 if (tbuf_size == 0) 889 return (0); /* TODO: this is an error return without error report through TIFFErrorExt */ 890 sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size); 891 if (sp->tbuf == NULL) 892 return (0); 893 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) 894 sp->user_datafmt = PixarLogGuessDataFmt(td); 895 if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) { 896 TIFFErrorExt(tif->tif_clientdata, module, "PixarLog compression can't handle %d bit linear encodings", td->td_bitspersample); 897 return (0); 898 } 899 900 if (deflateInit(&sp->stream, sp->quality) != Z_OK) { 901 TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg); 902 return (0); 903 } else { 904 sp->state |= PLSTATE_INIT; 905 return (1); 906 } 907 } 908 909 /* 910 * Reset encoding state at the start of a strip. 911 */ 912 static int 913 PixarLogPreEncode(TIFF* tif, uint16 s) 914 { 915 static const char module[] = "PixarLogPreEncode"; 916 PixarLogState *sp = EncoderState(tif); 917 918 (void) s; 919 assert(sp != NULL); 920 sp->stream.next_out = tif->tif_rawdata; 921 assert(sizeof(sp->stream.avail_out)==4); /* if this assert gets raised, 922 we need to simplify this code to reflect a ZLib that is likely updated 923 to deal with 8byte memory sizes, though this code will respond 924 apropriately even before we simplify it */ 925 sp->stream.avail_out = tif->tif_rawdatasize; 926 if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize) 927 { 928 TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size"); 929 return (0); 930 } 931 return (deflateReset(&sp->stream) == Z_OK); 932 } 933 934 static void 935 horizontalDifferenceF(float *ip, int n, int stride, uint16 *wp, uint16 *FromLT2) 936 { 937 int32 r1, g1, b1, a1, r2, g2, b2, a2, mask; 938 float fltsize = Fltsize; 939 940 #define CLAMP(v) ( (v<(float)0.) ? 0 \ 941 : (v<(float)2.) ? FromLT2[(int)(v*fltsize)] \ 942 : (v>(float)24.2) ? 2047 \ 943 : LogK1*log(v*LogK2) + 0.5 ) 944 945 mask = CODE_MASK; 946 if (n >= stride) { 947 if (stride == 3) { 948 r2 = wp[0] = (uint16) CLAMP(ip[0]); 949 g2 = wp[1] = (uint16) CLAMP(ip[1]); 950 b2 = wp[2] = (uint16) CLAMP(ip[2]); 951 n -= 3; 952 while (n > 0) { 953 n -= 3; 954 wp += 3; 955 ip += 3; 956 r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; 957 g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; 958 b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; 959 } 960 } else if (stride == 4) { 961 r2 = wp[0] = (uint16) CLAMP(ip[0]); 962 g2 = wp[1] = (uint16) CLAMP(ip[1]); 963 b2 = wp[2] = (uint16) CLAMP(ip[2]); 964 a2 = wp[3] = (uint16) CLAMP(ip[3]); 965 n -= 4; 966 while (n > 0) { 967 n -= 4; 968 wp += 4; 969 ip += 4; 970 r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; 971 g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; 972 b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; 973 a1 = (int32) CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1; 974 } 975 } else { 976 ip += n - 1; /* point to last one */ 977 wp += n - 1; /* point to last one */ 978 n -= stride; 979 while (n > 0) { 980 REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]); 981 wp[stride] -= wp[0]; 982 wp[stride] &= mask; 983 wp--; ip--) 984 n -= stride; 985 } 986 REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]); wp--; ip--) 987 } 988 } 989 } 990 991 static void 992 horizontalDifference16(unsigned short *ip, int n, int stride, 993 unsigned short *wp, uint16 *From14) 994 { 995 register int r1, g1, b1, a1, r2, g2, b2, a2, mask; 996 997 /* assumption is unsigned pixel values */ 998 #undef CLAMP 999 #define CLAMP(v) From14[(v) >> 2] 1000 1001 mask = CODE_MASK; 1002 if (n >= stride) { 1003 if (stride == 3) { 1004 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); 1005 b2 = wp[2] = CLAMP(ip[2]); 1006 n -= 3; 1007 while (n > 0) { 1008 n -= 3; 1009 wp += 3; 1010 ip += 3; 1011 r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; 1012 g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; 1013 b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; 1014 } 1015 } else if (stride == 4) { 1016 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); 1017 b2 = wp[2] = CLAMP(ip[2]); a2 = wp[3] = CLAMP(ip[3]); 1018 n -= 4; 1019 while (n > 0) { 1020 n -= 4; 1021 wp += 4; 1022 ip += 4; 1023 r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; 1024 g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; 1025 b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; 1026 a1 = CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1; 1027 } 1028 } else { 1029 ip += n - 1; /* point to last one */ 1030 wp += n - 1; /* point to last one */ 1031 n -= stride; 1032 while (n > 0) { 1033 REPEAT(stride, wp[0] = CLAMP(ip[0]); 1034 wp[stride] -= wp[0]; 1035 wp[stride] &= mask; 1036 wp--; ip--) 1037 n -= stride; 1038 } 1039 REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--) 1040 } 1041 } 1042 } 1043 1044 1045 static void 1046 horizontalDifference8(unsigned char *ip, int n, int stride, 1047 unsigned short *wp, uint16 *From8) 1048 { 1049 register int r1, g1, b1, a1, r2, g2, b2, a2, mask; 1050 1051 #undef CLAMP 1052 #define CLAMP(v) (From8[(v)]) 1053 1054 mask = CODE_MASK; 1055 if (n >= stride) { 1056 if (stride == 3) { 1057 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); 1058 b2 = wp[2] = CLAMP(ip[2]); 1059 n -= 3; 1060 while (n > 0) { 1061 n -= 3; 1062 r1 = CLAMP(ip[3]); wp[3] = (r1-r2) & mask; r2 = r1; 1063 g1 = CLAMP(ip[4]); wp[4] = (g1-g2) & mask; g2 = g1; 1064 b1 = CLAMP(ip[5]); wp[5] = (b1-b2) & mask; b2 = b1; 1065 wp += 3; 1066 ip += 3; 1067 } 1068 } else if (stride == 4) { 1069 r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); 1070 b2 = wp[2] = CLAMP(ip[2]); a2 = wp[3] = CLAMP(ip[3]); 1071 n -= 4; 1072 while (n > 0) { 1073 n -= 4; 1074 r1 = CLAMP(ip[4]); wp[4] = (r1-r2) & mask; r2 = r1; 1075 g1 = CLAMP(ip[5]); wp[5] = (g1-g2) & mask; g2 = g1; 1076 b1 = CLAMP(ip[6]); wp[6] = (b1-b2) & mask; b2 = b1; 1077 a1 = CLAMP(ip[7]); wp[7] = (a1-a2) & mask; a2 = a1; 1078 wp += 4; 1079 ip += 4; 1080 } 1081 } else { 1082 wp += n + stride - 1; /* point to last one */ 1083 ip += n + stride - 1; /* point to last one */ 1084 n -= stride; 1085 while (n > 0) { 1086 REPEAT(stride, wp[0] = CLAMP(ip[0]); 1087 wp[stride] -= wp[0]; 1088 wp[stride] &= mask; 1089 wp--; ip--) 1090 n -= stride; 1091 } 1092 REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--) 1093 } 1094 } 1095 } 1096 1097 /* 1098 * Encode a chunk of pixels. 1099 */ 1100 static int 1101 PixarLogEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s) 1102 { 1103 static const char module[] = "PixarLogEncode"; 1104 TIFFDirectory *td = &tif->tif_dir; 1105 PixarLogState *sp = EncoderState(tif); 1106 tmsize_t i; 1107 tmsize_t n; 1108 int llen; 1109 unsigned short * up; 1110 1111 (void) s; 1112 1113 switch (sp->user_datafmt) { 1114 case PIXARLOGDATAFMT_FLOAT: 1115 n = cc / sizeof(float); /* XXX float == 32 bits */ 1116 break; 1117 case PIXARLOGDATAFMT_16BIT: 1118 case PIXARLOGDATAFMT_12BITPICIO: 1119 case PIXARLOGDATAFMT_11BITLOG: 1120 n = cc / sizeof(uint16); /* XXX uint16 == 16 bits */ 1121 break; 1122 case PIXARLOGDATAFMT_8BIT: 1123 case PIXARLOGDATAFMT_8BITABGR: 1124 n = cc; 1125 break; 1126 default: 1127 TIFFErrorExt(tif->tif_clientdata, module, 1128 "%d bit input not supported in PixarLog", 1129 td->td_bitspersample); 1130 return 0; 1131 } 1132 1133 llen = sp->stride * td->td_imagewidth; 1134 1135 for (i = 0, up = sp->tbuf; i < n; i += llen, up += llen) { 1136 switch (sp->user_datafmt) { 1137 case PIXARLOGDATAFMT_FLOAT: 1138 horizontalDifferenceF((float *)bp, llen, 1139 sp->stride, up, sp->FromLT2); 1140 bp += llen * sizeof(float); 1141 break; 1142 case PIXARLOGDATAFMT_16BIT: 1143 horizontalDifference16((uint16 *)bp, llen, 1144 sp->stride, up, sp->From14); 1145 bp += llen * sizeof(uint16); 1146 break; 1147 case PIXARLOGDATAFMT_8BIT: 1148 horizontalDifference8((unsigned char *)bp, llen, 1149 sp->stride, up, sp->From8); 1150 bp += llen * sizeof(unsigned char); 1151 break; 1152 default: 1153 TIFFErrorExt(tif->tif_clientdata, module, 1154 "%d bit input not supported in PixarLog", 1155 td->td_bitspersample); 1156 return 0; 1157 } 1158 } 1159 1160 sp->stream.next_in = (unsigned char *) sp->tbuf; 1161 assert(sizeof(sp->stream.avail_in)==4); /* if this assert gets raised, 1162 we need to simplify this code to reflect a ZLib that is likely updated 1163 to deal with 8byte memory sizes, though this code will respond 1164 apropriately even before we simplify it */ 1165 sp->stream.avail_in = (uInt) (n * sizeof(uint16)); 1166 if ((sp->stream.avail_in / sizeof(uint16)) != (uInt) n) 1167 { 1168 TIFFErrorExt(tif->tif_clientdata, module, 1169 "ZLib cannot deal with buffers this size"); 1170 return (0); 1171 } 1172 1173 do { 1174 if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) { 1175 TIFFErrorExt(tif->tif_clientdata, module, "Encoder error: %s", 1176 sp->stream.msg); 1177 return (0); 1178 } 1179 if (sp->stream.avail_out == 0) { 1180 tif->tif_rawcc = tif->tif_rawdatasize; 1181 TIFFFlushData1(tif); 1182 sp->stream.next_out = tif->tif_rawdata; 1183 sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in PixarLogPreEncode */ 1184 } 1185 } while (sp->stream.avail_in > 0); 1186 return (1); 1187 } 1188 1189 /* 1190 * Finish off an encoded strip by flushing the last 1191 * string and tacking on an End Of Information code. 1192 */ 1193 1194 static int 1195 PixarLogPostEncode(TIFF* tif) 1196 { 1197 static const char module[] = "PixarLogPostEncode"; 1198 PixarLogState *sp = EncoderState(tif); 1199 int state; 1200 1201 sp->stream.avail_in = 0; 1202 1203 do { 1204 state = deflate(&sp->stream, Z_FINISH); 1205 switch (state) { 1206 case Z_STREAM_END: 1207 case Z_OK: 1208 if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize) { 1209 tif->tif_rawcc = 1210 tif->tif_rawdatasize - sp->stream.avail_out; 1211 TIFFFlushData1(tif); 1212 sp->stream.next_out = tif->tif_rawdata; 1213 sp->stream.avail_out = (uInt) tif->tif_rawdatasize; /* this is a safe typecast, as check is made already in PixarLogPreEncode */ 1214 } 1215 break; 1216 default: 1217 TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s", 1218 sp->stream.msg); 1219 return (0); 1220 } 1221 } while (state != Z_STREAM_END); 1222 return (1); 1223 } 1224 1225 static void 1226 PixarLogClose(TIFF* tif) 1227 { 1228 TIFFDirectory *td = &tif->tif_dir; 1229 1230 /* In a really sneaky (and really incorrect, and untruthfull, and 1231 * troublesome, and error-prone) maneuver that completely goes against 1232 * the spirit of TIFF, and breaks TIFF, on close, we covertly 1233 * modify both bitspersample and sampleformat in the directory to 1234 * indicate 8-bit linear. This way, the decode "just works" even for 1235 * readers that don't know about PixarLog, or how to set 1236 * the PIXARLOGDATFMT pseudo-tag. 1237 */ 1238 td->td_bitspersample = 8; 1239 td->td_sampleformat = SAMPLEFORMAT_UINT; 1240 } 1241 1242 static void 1243 PixarLogCleanup(TIFF* tif) 1244 { 1245 PixarLogState* sp = (PixarLogState*) tif->tif_data; 1246 1247 assert(sp != 0); 1248 1249 (void)TIFFPredictorCleanup(tif); 1250 1251 tif->tif_tagmethods.vgetfield = sp->vgetparent; 1252 tif->tif_tagmethods.vsetfield = sp->vsetparent; 1253 1254 if (sp->FromLT2) _TIFFfree(sp->FromLT2); 1255 if (sp->From14) _TIFFfree(sp->From14); 1256 if (sp->From8) _TIFFfree(sp->From8); 1257 if (sp->ToLinearF) _TIFFfree(sp->ToLinearF); 1258 if (sp->ToLinear16) _TIFFfree(sp->ToLinear16); 1259 if (sp->ToLinear8) _TIFFfree(sp->ToLinear8); 1260 if (sp->state&PLSTATE_INIT) { 1261 if (tif->tif_mode == O_RDONLY) 1262 inflateEnd(&sp->stream); 1263 else 1264 deflateEnd(&sp->stream); 1265 } 1266 if (sp->tbuf) 1267 _TIFFfree(sp->tbuf); 1268 _TIFFfree(sp); 1269 tif->tif_data = NULL; 1270 1271 _TIFFSetDefaultCompressionState(tif); 1272 } 1273 1274 static int 1275 PixarLogVSetField(TIFF* tif, uint32 tag, va_list ap) 1276 { 1277 static const char module[] = "PixarLogVSetField"; 1278 PixarLogState *sp = (PixarLogState *)tif->tif_data; 1279 int result; 1280 1281 switch (tag) { 1282 case TIFFTAG_PIXARLOGQUALITY: 1283 sp->quality = (int) va_arg(ap, int); 1284 if (tif->tif_mode != O_RDONLY && (sp->state&PLSTATE_INIT)) { 1285 if (deflateParams(&sp->stream, 1286 sp->quality, Z_DEFAULT_STRATEGY) != Z_OK) { 1287 TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s", 1288 sp->stream.msg); 1289 return (0); 1290 } 1291 } 1292 return (1); 1293 case TIFFTAG_PIXARLOGDATAFMT: 1294 sp->user_datafmt = (int) va_arg(ap, int); 1295 /* Tweak the TIFF header so that the rest of libtiff knows what 1296 * size of data will be passed between app and library, and 1297 * assume that the app knows what it is doing and is not 1298 * confused by these header manipulations... 1299 */ 1300 switch (sp->user_datafmt) { 1301 case PIXARLOGDATAFMT_8BIT: 1302 case PIXARLOGDATAFMT_8BITABGR: 1303 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8); 1304 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT); 1305 break; 1306 case PIXARLOGDATAFMT_11BITLOG: 1307 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16); 1308 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT); 1309 break; 1310 case PIXARLOGDATAFMT_12BITPICIO: 1311 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16); 1312 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT); 1313 break; 1314 case PIXARLOGDATAFMT_16BIT: 1315 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16); 1316 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT); 1317 break; 1318 case PIXARLOGDATAFMT_FLOAT: 1319 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 32); 1320 TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP); 1321 break; 1322 } 1323 /* 1324 * Must recalculate sizes should bits/sample change. 1325 */ 1326 tif->tif_tilesize = isTiled(tif) ? TIFFTileSize(tif) : (tmsize_t)(-1); 1327 tif->tif_scanlinesize = TIFFScanlineSize(tif); 1328 result = 1; /* NB: pseudo tag */ 1329 break; 1330 default: 1331 result = (*sp->vsetparent)(tif, tag, ap); 1332 } 1333 return (result); 1334 } 1335 1336 static int 1337 PixarLogVGetField(TIFF* tif, uint32 tag, va_list ap) 1338 { 1339 PixarLogState *sp = (PixarLogState *)tif->tif_data; 1340 1341 switch (tag) { 1342 case TIFFTAG_PIXARLOGQUALITY: 1343 *va_arg(ap, int*) = sp->quality; 1344 break; 1345 case TIFFTAG_PIXARLOGDATAFMT: 1346 *va_arg(ap, int*) = sp->user_datafmt; 1347 break; 1348 default: 1349 return (*sp->vgetparent)(tif, tag, ap); 1350 } 1351 return (1); 1352 } 1353 1354 static const TIFFField pixarlogFields[] = { 1355 {TIFFTAG_PIXARLOGDATAFMT, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, FALSE, FALSE, "", NULL}, 1356 {TIFFTAG_PIXARLOGQUALITY, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, FALSE, FALSE, "", NULL} 1357 }; 1358 1359 int 1360 TIFFInitPixarLog(TIFF* tif, int scheme) 1361 { 1362 static const char module[] = "TIFFInitPixarLog"; 1363 1364 PixarLogState* sp; 1365 1366 assert(scheme == COMPRESSION_PIXARLOG); 1367 1368 /* 1369 * Merge codec-specific tag information. 1370 */ 1371 if (!_TIFFMergeFields(tif, pixarlogFields, 1372 TIFFArrayCount(pixarlogFields))) { 1373 TIFFErrorExt(tif->tif_clientdata, module, 1374 "Merging PixarLog codec-specific tags failed"); 1375 return 0; 1376 } 1377 1378 /* 1379 * Allocate state block so tag methods have storage to record values. 1380 */ 1381 tif->tif_data = (uint8*) _TIFFmalloc(sizeof (PixarLogState)); 1382 if (tif->tif_data == NULL) 1383 goto bad; 1384 sp = (PixarLogState*) tif->tif_data; 1385 _TIFFmemset(sp, 0, sizeof (*sp)); 1386 sp->stream.data_type = Z_BINARY; 1387 sp->user_datafmt = PIXARLOGDATAFMT_UNKNOWN; 1388 1389 /* 1390 * Install codec methods. 1391 */ 1392 tif->tif_fixuptags = PixarLogFixupTags; 1393 tif->tif_setupdecode = PixarLogSetupDecode; 1394 tif->tif_predecode = PixarLogPreDecode; 1395 tif->tif_decoderow = PixarLogDecode; 1396 tif->tif_decodestrip = PixarLogDecode; 1397 tif->tif_decodetile = PixarLogDecode; 1398 tif->tif_setupencode = PixarLogSetupEncode; 1399 tif->tif_preencode = PixarLogPreEncode; 1400 tif->tif_postencode = PixarLogPostEncode; 1401 tif->tif_encoderow = PixarLogEncode; 1402 tif->tif_encodestrip = PixarLogEncode; 1403 tif->tif_encodetile = PixarLogEncode; 1404 tif->tif_close = PixarLogClose; 1405 tif->tif_cleanup = PixarLogCleanup; 1406 1407 /* Override SetField so we can handle our private pseudo-tag */ 1408 sp->vgetparent = tif->tif_tagmethods.vgetfield; 1409 tif->tif_tagmethods.vgetfield = PixarLogVGetField; /* hook for codec tags */ 1410 sp->vsetparent = tif->tif_tagmethods.vsetfield; 1411 tif->tif_tagmethods.vsetfield = PixarLogVSetField; /* hook for codec tags */ 1412 1413 /* Default values for codec-specific fields */ 1414 sp->quality = Z_DEFAULT_COMPRESSION; /* default comp. level */ 1415 sp->state = 0; 1416 1417 /* we don't wish to use the predictor, 1418 * the default is none, which predictor value 1 1419 */ 1420 (void) TIFFPredictorInit(tif); 1421 1422 /* 1423 * build the companding tables 1424 */ 1425 PixarLogMakeTables(sp); 1426 1427 return (1); 1428 bad: 1429 TIFFErrorExt(tif->tif_clientdata, module, 1430 "No space for PixarLog state block"); 1431 return (0); 1432 } 1433 #endif /* PIXARLOG_SUPPORT */ 1434 1435 /* vim: set ts=8 sts=8 sw=8 noet: */ 1436 /* 1437 * Local Variables: 1438 * mode: c 1439 * c-basic-offset: 8 1440 * fill-column: 78 1441 * End: 1442 */ 1443
