src/SDL2/external/tiff-4.0.3/libtiff/tif_lzma.c

   1 /* $Id: tif_lzma.c,v 1.4 2011-12-22 00:29:29 bfriesen Exp $ */
   2
   3 /*
   4  * Copyright (c) 2010, Andrey Kiselev <dron@ak4719.spb.edu>
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and
   7  * its documentation for any purpose is hereby granted without fee, provided
   8  * that (i) the above copyright notices and this permission notice appear in
   9  * all copies of the software and related documentation, and (ii) the names of
  10  * Sam Leffler and Silicon Graphics may not be used in any advertising or
  11  * publicity relating to the software without the specific, prior written
  12  * permission of Sam Leffler and Silicon Graphics.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
  15  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
  16  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  17  *
  18  * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
  19  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
  20  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  21  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
  22  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  23  * OF THIS SOFTWARE.
  24  */
  25
  26 #include "tiffiop.h"
  27 #ifdef LZMA_SUPPORT
  28 /*
  29  * TIFF Library.
  30  *
  31  * LZMA2 Compression Support
  32  *
  33  * You need an LZMA2 SDK to link with. See http://tukaani.org/xz/ for details.
  34  *
  35  * The codec is derived from ZLIB codec (tif_zip.c).
  36  */
  37
  38 #include "tif_predict.h"
  39 #include "lzma.h"
  40
  41 #include <stdio.h>
  42
  43 /*
  44  * State block for each open TIFF file using LZMA2 compression/decompression.
  45  */
  46 typedef struct {
  47         TIFFPredictorState predict;
  48         lzma_stream     stream;
  49         lzma_filter     filters[LZMA_FILTERS_MAX + 1];
  50         lzma_options_delta opt_delta;           /* delta filter options */
  51         lzma_options_lzma opt_lzma;             /* LZMA2 filter options */
  52         int             preset;                 /* compression level */
  53         lzma_check      check;                  /* type of the integrity check */
  54         int             state;                  /* state flags */
  55 #define LSTATE_INIT_DECODE 0x01
  56 #define LSTATE_INIT_ENCODE 0x02
  57
  58         TIFFVGetMethod  vgetparent;            /* super-class method */
  59         TIFFVSetMethod  vsetparent;            /* super-class method */
  60 } LZMAState;
  61
  62 #define LState(tif)             ((LZMAState*) (tif)->tif_data)
  63 #define DecoderState(tif)       LState(tif)
  64 #define EncoderState(tif)       LState(tif)
  65
  66 static int LZMAEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s);
  67 static int LZMADecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s);
  68
  69 static const char *
  70 LZMAStrerror(lzma_ret ret)
  71 {
  72         switch (ret) {
  73                 case LZMA_OK:
  74                     return "operation completed successfully";
  75                 case LZMA_STREAM_END:
  76                     return "end of stream was reached";
  77                 case LZMA_NO_CHECK:
  78                     return "input stream has no integrity check";
  79                 case LZMA_UNSUPPORTED_CHECK:
  80                     return "cannot calculate the integrity check";
  81                 case LZMA_GET_CHECK:
  82                     return "integrity check type is now available";
  83                 case LZMA_MEM_ERROR:
  84                     return "cannot allocate memory";
  85                 case LZMA_MEMLIMIT_ERROR:
  86                     return "memory usage limit was reached";
  87                 case LZMA_FORMAT_ERROR:
  88                     return "file format not recognized";
  89                 case LZMA_OPTIONS_ERROR:
  90                     return "invalid or unsupported options";
  91                 case LZMA_DATA_ERROR:
  92                     return "data is corrupt";
  93                 case LZMA_BUF_ERROR:
  94                     return "no progress is possible (stream is truncated or corrupt)";
  95                 case LZMA_PROG_ERROR:
  96                     return "programming error";
  97                 default:
  98                     return "unindentified liblzma error";
  99         }
 100 }
 101
 102 static int
 103 LZMAFixupTags(TIFF* tif)
 104 {
 105         (void) tif;
 106         return 1;
 107 }
 108
 109 static int
 110 LZMASetupDecode(TIFF* tif)
 111 {
 112         LZMAState* sp = DecoderState(tif);
 113
 114         assert(sp != NULL);
 115
 116         /* if we were last encoding, terminate this mode */
 117         if (sp->state & LSTATE_INIT_ENCODE) {
 118             lzma_end(&sp->stream);
 119             sp->state = 0;
 120         }
 121
 122         sp->state |= LSTATE_INIT_DECODE;
 123         return 1;
 124 }
 125
 126 /*
 127  * Setup state for decoding a strip.
 128  */
 129 static int
 130 LZMAPreDecode(TIFF* tif, uint16 s)
 131 {
 132         static const char module[] = "LZMAPreDecode";
 133         LZMAState* sp = DecoderState(tif);
 134         lzma_ret ret;
 135
 136         (void) s;
 137         assert(sp != NULL);
 138
 139         if( (sp->state & LSTATE_INIT_DECODE) == 0 )
 140             tif->tif_setupdecode(tif);
 141
 142         sp->stream.next_in = tif->tif_rawdata;
 143         sp->stream.avail_in = (size_t) tif->tif_rawcc;
 144         if ((tmsize_t)sp->stream.avail_in != tif->tif_rawcc) {
 145                 TIFFErrorExt(tif->tif_clientdata, module,
 146                              "Liblzma cannot deal with buffers this size");
 147                 return 0;
 148         }
 149
 150         /*
 151          * Disable memory limit when decoding. UINT64_MAX is a flag to disable
 152          * the limit, we are passing (uint64_t)-1 which should be the same.
 153          */
 154         ret = lzma_stream_decoder(&sp->stream, (uint64_t)-1, 0);
 155         if (ret != LZMA_OK) {
 156                 TIFFErrorExt(tif->tif_clientdata, module,
 157                              "Error initializing the stream decoder, %s",
 158                              LZMAStrerror(ret));
 159                 return 0;
 160         }
 161         return 1;
 162 }
 163
 164 static int
 165 LZMADecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s)
 166 {
 167         static const char module[] = "LZMADecode";
 168         LZMAState* sp = DecoderState(tif);
 169
 170         (void) s;
 171         assert(sp != NULL);
 172         assert(sp->state == LSTATE_INIT_DECODE);
 173
 174         sp->stream.next_in = tif->tif_rawcp;
 175         sp->stream.avail_in = (size_t) tif->tif_rawcc;
 176
 177         sp->stream.next_out = op;
 178         sp->stream.avail_out = (size_t) occ;
 179         if ((tmsize_t)sp->stream.avail_out != occ) {
 180                 TIFFErrorExt(tif->tif_clientdata, module,
 181                              "Liblzma cannot deal with buffers this size");
 182                 return 0;
 183         }
 184
 185         do {
 186                 /*
 187                  * Save the current stream state to properly recover from the
 188                  * decoding errors later.
 189                  */
 190                 const uint8_t *next_in = sp->stream.next_in;
 191                 size_t avail_in = sp->stream.avail_in;
 192
 193                 lzma_ret ret = lzma_code(&sp->stream, LZMA_RUN);
 194                 if (ret == LZMA_STREAM_END)
 195                         break;
 196                 if (ret == LZMA_MEMLIMIT_ERROR) {
 197                         lzma_ret r = lzma_stream_decoder(&sp->stream,
 198                                                          lzma_memusage(&sp->stream), 0);
 199                         if (r != LZMA_OK) {
 200                                 TIFFErrorExt(tif->tif_clientdata, module,
 201                                              "Error initializing the stream decoder, %s",
 202                                              LZMAStrerror(r));
 203                                 break;
 204                         }
 205                         sp->stream.next_in = next_in;
 206                         sp->stream.avail_in = avail_in;
 207                         continue;
 208                 }
 209                 if (ret != LZMA_OK) {
 210                         TIFFErrorExt(tif->tif_clientdata, module,
 211                             "Decoding error at scanline %lu, %s",
 212                             (unsigned long) tif->tif_row, LZMAStrerror(ret));
 213                         break;
 214                 }
 215         } while (sp->stream.avail_out > 0);
 216         if (sp->stream.avail_out != 0) {
 217                 TIFFErrorExt(tif->tif_clientdata, module,
 218                     "Not enough data at scanline %lu (short %lu bytes)",
 219                     (unsigned long) tif->tif_row, (unsigned long) sp->stream.avail_out);
 220                 return 0;
 221         }
 222
 223         tif->tif_rawcp = (uint8 *)sp->stream.next_in; /* cast away const */
 224         tif->tif_rawcc = sp->stream.avail_in;
 225
 226         return 1;
 227 }
 228
 229 static int
 230 LZMASetupEncode(TIFF* tif)
 231 {
 232         LZMAState* sp = EncoderState(tif);
 233
 234         assert(sp != NULL);
 235         if (sp->state & LSTATE_INIT_DECODE) {
 236                 lzma_end(&sp->stream);
 237                 sp->state = 0;
 238         }
 239
 240         sp->state |= LSTATE_INIT_ENCODE;
 241         return 1;
 242 }
 243
 244 /*
 245  * Reset encoding state at the start of a strip.
 246  */
 247 static int
 248 LZMAPreEncode(TIFF* tif, uint16 s)
 249 {
 250         static const char module[] = "LZMAPreEncode";
 251         LZMAState *sp = EncoderState(tif);
 252
 253         (void) s;
 254         assert(sp != NULL);
 255         if( sp->state != LSTATE_INIT_ENCODE )
 256             tif->tif_setupencode(tif);
 257
 258         sp->stream.next_out = tif->tif_rawdata;
 259         sp->stream.avail_out = (size_t)tif->tif_rawdatasize;
 260         if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize) {
 261                 TIFFErrorExt(tif->tif_clientdata, module,
 262                              "Liblzma cannot deal with buffers this size");
 263                 return 0;
 264         }
 265         return (lzma_stream_encoder(&sp->stream, sp->filters, sp->check) == LZMA_OK);
 266 }
 267
 268 /*
 269  * Encode a chunk of pixels.
 270  */
 271 static int
 272 LZMAEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
 273 {
 274         static const char module[] = "LZMAEncode";
 275         LZMAState *sp = EncoderState(tif);
 276
 277         assert(sp != NULL);
 278         assert(sp->state == LSTATE_INIT_ENCODE);
 279
 280         (void) s;
 281         sp->stream.next_in = bp;
 282         sp->stream.avail_in = (size_t) cc;
 283         if ((tmsize_t)sp->stream.avail_in != cc) {
 284                 TIFFErrorExt(tif->tif_clientdata, module,
 285                              "Liblzma cannot deal with buffers this size");
 286                 return 0;
 287         }
 288         do {
 289                 lzma_ret ret = lzma_code(&sp->stream, LZMA_RUN);
 290                 if (ret != LZMA_OK) {
 291                         TIFFErrorExt(tif->tif_clientdata, module,
 292                                 "Encoding error at scanline %lu, %s",
 293                                 (unsigned long) tif->tif_row, LZMAStrerror(ret));
 294                         return 0;
 295                 }
 296                 if (sp->stream.avail_out == 0) {
 297                         tif->tif_rawcc = tif->tif_rawdatasize;
 298                         TIFFFlushData1(tif);
 299                         sp->stream.next_out = tif->tif_rawdata;
 300                         sp->stream.avail_out = (size_t)tif->tif_rawdatasize;  /* this is a safe typecast, as check is made already in LZMAPreEncode */
 301                 }
 302         } while (sp->stream.avail_in > 0);
 303         return 1;
 304 }
 305
 306 /*
 307  * Finish off an encoded strip by flushing the last
 308  * string and tacking on an End Of Information code.
 309  */
 310 static int
 311 LZMAPostEncode(TIFF* tif)
 312 {
 313         static const char module[] = "LZMAPostEncode";
 314         LZMAState *sp = EncoderState(tif);
 315         lzma_ret ret;
 316
 317         sp->stream.avail_in = 0;
 318         do {
 319                 ret = lzma_code(&sp->stream, LZMA_FINISH);
 320                 switch (ret) {
 321                 case LZMA_STREAM_END:
 322                 case LZMA_OK:
 323                         if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize) {
 324                                 tif->tif_rawcc =
 325                                         tif->tif_rawdatasize - sp->stream.avail_out;
 326                                 TIFFFlushData1(tif);
 327                                 sp->stream.next_out = tif->tif_rawdata;
 328                                 sp->stream.avail_out = (size_t)tif->tif_rawdatasize;  /* this is a safe typecast, as check is made already in ZIPPreEncode */
 329                         }
 330                         break;
 331                 default:
 332                         TIFFErrorExt(tif->tif_clientdata, module, "Liblzma error: %s",
 333                                      LZMAStrerror(ret));
 334                         return 0;
 335                 }
 336         } while (ret != LZMA_STREAM_END);
 337         return 1;
 338 }
 339
 340 static void
 341 LZMACleanup(TIFF* tif)
 342 {
 343         LZMAState* sp = LState(tif);
 344
 345         assert(sp != 0);
 346
 347         (void)TIFFPredictorCleanup(tif);
 348
 349         tif->tif_tagmethods.vgetfield = sp->vgetparent;
 350         tif->tif_tagmethods.vsetfield = sp->vsetparent;
 351
 352         if (sp->state) {
 353                 lzma_end(&sp->stream);
 354                 sp->state = 0;
 355         }
 356         _TIFFfree(sp);
 357         tif->tif_data = NULL;
 358
 359         _TIFFSetDefaultCompressionState(tif);
 360 }
 361
 362 static int
 363 LZMAVSetField(TIFF* tif, uint32 tag, va_list ap)
 364 {
 365         static const char module[] = "LZMAVSetField";
 366         LZMAState* sp = LState(tif);
 367
 368         switch (tag) {
 369         case TIFFTAG_LZMAPRESET:
 370                 sp->preset = (int) va_arg(ap, int);
 371                 lzma_lzma_preset(&sp->opt_lzma, sp->preset);
 372                 if (sp->state & LSTATE_INIT_ENCODE) {
 373                         lzma_ret ret = lzma_stream_encoder(&sp->stream,
 374                                                            sp->filters,
 375                                                            sp->check);
 376                         if (ret != LZMA_OK) {
 377                                 TIFFErrorExt(tif->tif_clientdata, module,
 378                                              "Liblzma error: %s",
 379                                              LZMAStrerror(ret));
 380                         }
 381                 }
 382                 return 1;
 383         default:
 384                 return (*sp->vsetparent)(tif, tag, ap);
 385         }
 386         /*NOTREACHED*/
 387 }
 388
 389 static int
 390 LZMAVGetField(TIFF* tif, uint32 tag, va_list ap)
 391 {
 392         LZMAState* sp = LState(tif);
 393
 394         switch (tag) {
 395         case TIFFTAG_LZMAPRESET:
 396                 *va_arg(ap, int*) = sp->preset;
 397                 break;
 398         default:
 399                 return (*sp->vgetparent)(tif, tag, ap);
 400         }
 401         return 1;
 402 }
 403
 404 static const TIFFField lzmaFields[] = {
 405         { TIFFTAG_LZMAPRESET, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED,
 406                 FIELD_PSEUDO, TRUE, FALSE, "LZMA2 Compression Preset", NULL },
 407 };
 408
 409 int
 410 TIFFInitLZMA(TIFF* tif, int scheme)
 411 {
 412         static const char module[] = "TIFFInitLZMA";
 413         LZMAState* sp;
 414         lzma_stream tmp_stream = LZMA_STREAM_INIT;
 415
 416         assert( scheme == COMPRESSION_LZMA );
 417
 418         /*
 419          * Merge codec-specific tag information.
 420          */
 421         if (!_TIFFMergeFields(tif, lzmaFields, TIFFArrayCount(lzmaFields))) {
 422                 TIFFErrorExt(tif->tif_clientdata, module,
 423                              "Merging LZMA2 codec-specific tags failed");
 424                 return 0;
 425         }
 426
 427         /*
 428          * Allocate state block so tag methods have storage to record values.
 429          */
 430         tif->tif_data = (uint8*) _TIFFmalloc(sizeof(LZMAState));
 431         if (tif->tif_data == NULL)
 432                 goto bad;
 433         sp = LState(tif);
 434         memcpy(&sp->stream, &tmp_stream, sizeof(lzma_stream));
 435
 436         /*
 437          * Override parent get/set field methods.
 438          */
 439         sp->vgetparent = tif->tif_tagmethods.vgetfield;
 440         tif->tif_tagmethods.vgetfield = LZMAVGetField;  /* hook for codec tags */
 441         sp->vsetparent = tif->tif_tagmethods.vsetfield;
 442         tif->tif_tagmethods.vsetfield = LZMAVSetField;  /* hook for codec tags */
 443
 444         /* Default values for codec-specific fields */
 445         sp->preset = LZMA_PRESET_DEFAULT;               /* default comp. level */
 446         sp->check = LZMA_CHECK_NONE;
 447         sp->state = 0;
 448
 449         /* Data filters. So far we are using delta and LZMA2 filters only. */
 450         sp->opt_delta.type = LZMA_DELTA_TYPE_BYTE;
 451         /*
 452          * The sample size in bytes seems to be reasonable distance for delta
 453          * filter.
 454          */
 455         sp->opt_delta.dist = (tif->tif_dir.td_bitspersample % 8) ?
 456                 1 : tif->tif_dir.td_bitspersample / 8;
 457         sp->filters[0].id = LZMA_FILTER_DELTA;
 458         sp->filters[0].options = &sp->opt_delta;
 459
 460         lzma_lzma_preset(&sp->opt_lzma, sp->preset);
 461         sp->filters[1].id = LZMA_FILTER_LZMA2;
 462         sp->filters[1].options = &sp->opt_lzma;
 463
 464         sp->filters[2].id = LZMA_VLI_UNKNOWN;
 465         sp->filters[2].options = NULL;
 466
 467         /*
 468          * Install codec methods.
 469          */
 470         tif->tif_fixuptags = LZMAFixupTags;
 471         tif->tif_setupdecode = LZMASetupDecode;
 472         tif->tif_predecode = LZMAPreDecode;
 473         tif->tif_decoderow = LZMADecode;
 474         tif->tif_decodestrip = LZMADecode;
 475         tif->tif_decodetile = LZMADecode;
 476         tif->tif_setupencode = LZMASetupEncode;
 477         tif->tif_preencode = LZMAPreEncode;
 478         tif->tif_postencode = LZMAPostEncode;
 479         tif->tif_encoderow = LZMAEncode;
 480         tif->tif_encodestrip = LZMAEncode;
 481         tif->tif_encodetile = LZMAEncode;
 482         tif->tif_cleanup = LZMACleanup;
 483         /*
 484          * Setup predictor setup.
 485          */
 486         (void) TIFFPredictorInit(tif);
 487         return 1;
 488 bad:
 489         TIFFErrorExt(tif->tif_clientdata, module,
 490                      "No space for LZMA2 state block");
 491         return 0;
 492 }
 493 #endif /* LZMA_SUPORT */
 494
 495 /* vim: set ts=8 sts=8 sw=8 noet: */