Line data Source code
1 : /*
2 : * Copyright (c) 1994-1997 Sam Leffler
3 : * Copyright (c) 1994-1997 Silicon Graphics, Inc.
4 : *
5 : * Permission to use, copy, modify, distribute, and sell this software and
6 : * its documentation for any purpose is hereby granted without fee, provided
7 : * that (i) the above copyright notices and this permission notice appear in
8 : * all copies of the software and related documentation, and (ii) the names of
9 : * Sam Leffler and Silicon Graphics may not be used in any advertising or
10 : * publicity relating to the software without the specific, prior written
11 : * permission of Sam Leffler and Silicon Graphics.
12 : *
13 : * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
14 : * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 : * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 : *
17 : * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
18 : * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 : * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 : * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 : * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
22 : * OF THIS SOFTWARE.
23 : */
24 :
25 : #include "tiffiop.h"
26 : #include <stdlib.h>
27 :
28 : #ifdef JPEG_SUPPORT
29 :
30 : /*
31 : * TIFF Library
32 : *
33 : * JPEG Compression support per TIFF Technical Note #2
34 : * (*not* per the original TIFF 6.0 spec).
35 : *
36 : * This file is simply an interface to the libjpeg library written by
37 : * the Independent JPEG Group. You need release 5 or later of the IJG
38 : * code, which you can find on the Internet at ftp.uu.net:/graphics/jpeg/.
39 : *
40 : * Contributed by Tom Lane <tgl@sss.pgh.pa.us>.
41 : */
42 : #include <setjmp.h>
43 :
44 : /* Settings that are independent of libjpeg ABI. Used when reinitializing the */
45 : /* JPEGState from libjpegs 8 bit to libjpeg 12 bits, which have potentially */
46 : /* different ABI */
47 : typedef struct
48 : {
49 : TIFFVGetMethod vgetparent; /* super-class method */
50 : TIFFVSetMethod vsetparent; /* super-class method */
51 : TIFFPrintMethod printdir; /* super-class method */
52 : TIFFStripMethod defsparent; /* super-class method */
53 : TIFFTileMethod deftparent; /* super-class method */
54 :
55 : /* pseudo-tag fields */
56 : void *jpegtables; /* JPEGTables tag value, or NULL */
57 : uint32_t jpegtables_length; /* number of bytes in same */
58 : int jpegquality; /* Compression quality level */
59 : int jpegcolormode; /* Auto RGB<=>YCbCr convert? */
60 : int jpegtablesmode; /* What to put in JPEGTables */
61 :
62 : int ycbcrsampling_fetched;
63 : int max_allowed_scan_number;
64 : int has_warned_about_progressive_mode;
65 : } JPEGOtherSettings;
66 :
67 : int TIFFFillStrip(TIFF *tif, uint32_t strip);
68 : int TIFFFillTile(TIFF *tif, uint32_t tile);
69 : int TIFFReInitJPEG_12(TIFF *tif, const JPEGOtherSettings *otherSettings,
70 : int scheme, int is_encode);
71 : int TIFFJPEGIsFullStripRequired_12(TIFF *tif);
72 :
73 : #include "jerror.h"
74 : #include "jpeglib.h"
75 :
76 : /* Do optional compile-time version check */
77 : #if defined(EXPECTED_JPEG_LIB_VERSION) && !defined(LIBJPEG_12_PATH)
78 : #if EXPECTED_JPEG_LIB_VERSION != JPEG_LIB_VERSION
79 : #error EXPECTED_JPEG_LIB_VERSION != JPEG_LIB_VERSION
80 : #endif
81 : #endif
82 :
83 : /*
84 : * Do we want to do special processing suitable for when JSAMPLE is a
85 : * 16bit value?
86 : */
87 :
88 : /* HAVE_JPEGTURBO_DUAL_MODE_8_12 is defined for libjpeg-turbo >= 3.0 which
89 : * adds a dual-mode 8/12 bit API in the same library.
90 : * (note: libjpeg-turbo 2.2 was actually released as 3.0)
91 : */
92 :
93 : #if defined(HAVE_JPEGTURBO_DUAL_MODE_8_12)
94 : #define JPEG_DUAL_MODE_8_12
95 : /* Start by undefining BITS_IN_JSAMPLE which is always set to 8 in libjpeg-turbo
96 : * >= 3.0 Cf
97 : * https://github.com/libjpeg-turbo/libjpeg-turbo/commit/8b9bc4b9635a2a047fb23ebe70c9acd728d3f99b
98 : */
99 : #undef BITS_IN_JSAMPLE
100 : /* libjpeg-turbo >= 3.0 adds J12xxxx datatypes for the 12-bit mode. */
101 : #if defined(FROM_TIF_JPEG_12)
102 : #define BITS_IN_JSAMPLE 12
103 : #define TIFF_JSAMPLE J12SAMPLE
104 : #define TIFF_JSAMPARRAY J12SAMPARRAY
105 : #define TIFF_JSAMPIMAGE J12SAMPIMAGE
106 : #define TIFF_JSAMPROW J12SAMPROW
107 : #else
108 : #define BITS_IN_JSAMPLE 8
109 : #define TIFF_JSAMPLE JSAMPLE
110 : #define TIFF_JSAMPARRAY JSAMPARRAY
111 : #define TIFF_JSAMPIMAGE JSAMPIMAGE
112 : #define TIFF_JSAMPROW JSAMPROW
113 : #endif
114 : #else
115 : #define TIFF_JSAMPLE JSAMPLE
116 : #define TIFF_JSAMPARRAY JSAMPARRAY
117 : #define TIFF_JSAMPIMAGE JSAMPIMAGE
118 : #define TIFF_JSAMPROW JSAMPROW
119 : #endif
120 :
121 : #if defined(JPEG_LIB_MK1)
122 : #define JPEG_LIB_MK1_OR_12BIT 1
123 : #elif BITS_IN_JSAMPLE == 12
124 : #define JPEG_LIB_MK1_OR_12BIT 1
125 : #endif
126 :
127 : /*
128 : * We are using width_in_blocks which is supposed to be private to
129 : * libjpeg. Unfortunately, the libjpeg delivered with Cygwin has
130 : * renamed this member to width_in_data_units. Since the header has
131 : * also renamed a define, use that unique define name in order to
132 : * detect the problem header and adjust to suit.
133 : */
134 : #if defined(D_MAX_DATA_UNITS_IN_MCU)
135 : #define width_in_blocks width_in_data_units
136 : #endif
137 :
138 : /*
139 : * On some machines it may be worthwhile to use _setjmp or sigsetjmp
140 : * in place of plain setjmp. These macros will make it easier.
141 : */
142 : #define SETJMP(jbuf) setjmp(jbuf)
143 : #define LONGJMP(jbuf, code) longjmp(jbuf, code)
144 : #define JMP_BUF jmp_buf
145 :
146 : typedef struct jpeg_destination_mgr tiff_jpeg_destination_mgr;
147 : typedef struct jpeg_source_mgr tiff_jpeg_source_mgr;
148 : typedef struct jpeg_error_mgr tiff_jpeg_error_mgr;
149 :
150 : /*
151 : * State block for each open TIFF file using
152 : * libjpeg to do JPEG compression/decompression.
153 : *
154 : * libjpeg's visible state is either a jpeg_compress_struct
155 : * or jpeg_decompress_struct depending on which way we
156 : * are going. comm can be used to refer to the fields
157 : * which are common to both.
158 : *
159 : * NB: cinfo is required to be the first member of JPEGState,
160 : * so we can safely cast JPEGState* -> jpeg_xxx_struct*
161 : * and vice versa!
162 : */
163 : #ifdef _MSC_VER
164 : #pragma warning(push)
165 : #pragma warning(disable : 4324) /* structure padding due to alignment */
166 : #endif
167 : typedef struct
168 : {
169 : union
170 : {
171 : struct jpeg_compress_struct c;
172 : struct jpeg_decompress_struct d;
173 : struct jpeg_common_struct comm;
174 : } cinfo; /* NB: must be first */
175 : int cinfo_initialized;
176 :
177 : tiff_jpeg_error_mgr err; /* libjpeg error manager */
178 : JMP_BUF exit_jmpbuf; /* for catching libjpeg failures */
179 :
180 : struct jpeg_progress_mgr progress;
181 : /*
182 : * The following two members could be a union, but
183 : * they're small enough that it's not worth the effort.
184 : */
185 : tiff_jpeg_destination_mgr dest; /* data dest for compression */
186 : tiff_jpeg_source_mgr src; /* data source for decompression */
187 : /* private state */
188 : TIFF *tif; /* back link needed by some code */
189 : uint16_t photometric; /* copy of PhotometricInterpretation */
190 : uint16_t h_sampling; /* luminance sampling factors */
191 : uint16_t v_sampling;
192 : tmsize_t bytesperline; /* decompressed bytes per scanline */
193 : uint32_t strile_width;
194 : uint32_t strile_height;
195 : /* pointers to intermediate buffers when processing downsampled data */
196 : TIFF_JSAMPARRAY ds_buffer[MAX_COMPONENTS];
197 : int scancount; /* number of "scanlines" accumulated */
198 : int samplesperclump;
199 :
200 : JPEGOtherSettings otherSettings;
201 :
202 : int encode_raw_error;
203 : } JPEGState;
204 : #ifdef _MSC_VER
205 : #pragma warning(pop)
206 : #endif
207 :
208 : #define JState(tif) ((JPEGState *)(tif)->tif_data)
209 :
210 : static int JPEGDecode(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s);
211 : static int JPEGDecodeRaw(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s);
212 : static int JPEGEncode(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s);
213 : static int JPEGEncodeRaw(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s);
214 : static int JPEGInitializeLibJPEG(TIFF *tif, int decode);
215 : static int DecodeRowError(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s);
216 :
217 : #define FIELD_JPEGTABLES (FIELD_CODEC + 0)
218 :
219 : static const TIFFField jpegFields[] = {
220 : {TIFFTAG_JPEGTABLES, -3, -3, TIFF_UNDEFINED, 0, TIFF_SETGET_C32_UINT8,
221 : FIELD_JPEGTABLES, FALSE, TRUE, "JPEGTables", NULL},
222 : {TIFFTAG_JPEGQUALITY, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, FIELD_PSEUDO,
223 : TRUE, FALSE, "", NULL},
224 : {TIFFTAG_JPEGCOLORMODE, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, FIELD_PSEUDO,
225 : FALSE, FALSE, "", NULL},
226 : {TIFFTAG_JPEGTABLESMODE, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, FIELD_PSEUDO,
227 : FALSE, FALSE, "", NULL}};
228 :
229 : /*
230 : * libjpeg interface layer.
231 : *
232 : * We use setjmp/longjmp to return control to libtiff
233 : * when a fatal error is encountered within the JPEG
234 : * library. We also direct libjpeg error and warning
235 : * messages through the appropriate libtiff handlers.
236 : */
237 :
238 : /*
239 : * Error handling routines (these replace corresponding
240 : * IJG routines from jerror.c). These are used for both
241 : * compression and decompression.
242 : */
243 0 : static void TIFFjpeg_error_exit(j_common_ptr cinfo)
244 : {
245 0 : JPEGState *sp = (JPEGState *)cinfo; /* NB: cinfo assumed first */
246 : char buffer[JMSG_LENGTH_MAX];
247 :
248 0 : (*cinfo->err->format_message)(cinfo, buffer);
249 0 : TIFFErrorExtR(sp->tif, "JPEGLib", "%s",
250 : buffer); /* display the error message */
251 0 : jpeg_abort(cinfo); /* clean up libjpeg state */
252 0 : LONGJMP(sp->exit_jmpbuf, 1); /* return to libtiff caller */
253 : }
254 :
255 : /*
256 : * This routine is invoked only for warning messages,
257 : * since error_exit does its own thing and trace_level
258 : * is never set > 0.
259 : */
260 69 : static void TIFFjpeg_output_message(j_common_ptr cinfo)
261 : {
262 : char buffer[JMSG_LENGTH_MAX];
263 :
264 69 : (*cinfo->err->format_message)(cinfo, buffer);
265 69 : TIFFWarningExtR(((JPEGState *)cinfo)->tif, "JPEGLib", "%s", buffer);
266 69 : }
267 :
268 : /* Avoid the risk of denial-of-service on crafted JPEGs with an insane */
269 : /* number of scans. */
270 : /* See
271 : * http://www.libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf
272 : */
273 225664 : static void TIFFjpeg_progress_monitor(j_common_ptr cinfo)
274 : {
275 225664 : JPEGState *sp = (JPEGState *)cinfo; /* NB: cinfo assumed first */
276 225664 : if (cinfo->is_decompressor)
277 : {
278 225664 : const int scan_no = ((j_decompress_ptr)cinfo)->input_scan_number;
279 225664 : if (scan_no >= sp->otherSettings.max_allowed_scan_number)
280 : {
281 2 : TIFFErrorExtR(
282 : ((JPEGState *)cinfo)->tif, "TIFFjpeg_progress_monitor",
283 : "Scan number %d exceeds maximum scans (%d). This limit "
284 : "can be raised through the "
285 : "LIBTIFF_JPEG_MAX_ALLOWED_SCAN_NUMBER "
286 : "environment variable.",
287 : scan_no, sp->otherSettings.max_allowed_scan_number);
288 :
289 2 : jpeg_abort(cinfo); /* clean up libjpeg state */
290 2 : LONGJMP(sp->exit_jmpbuf, 1); /* return to libtiff caller */
291 : }
292 : }
293 225662 : }
294 :
295 : /*
296 : * Interface routines. This layer of routines exists
297 : * primarily to limit side-effects from using setjmp.
298 : * Also, normal/error returns are converted into return
299 : * values per libtiff practice.
300 : */
301 : #define CALLJPEG(sp, fail, op) (SETJMP((sp)->exit_jmpbuf) ? (fail) : (op))
302 : #define CALLVJPEG(sp, op) CALLJPEG(sp, 0, ((op), 1))
303 :
304 2203 : static int TIFFjpeg_create_compress(JPEGState *sp)
305 : {
306 : /* initialize JPEG error handling */
307 2203 : sp->cinfo.c.err = jpeg_std_error(&sp->err);
308 2203 : sp->err.error_exit = TIFFjpeg_error_exit;
309 2203 : sp->err.output_message = TIFFjpeg_output_message;
310 :
311 : /* set client_data to avoid UMR warning from tools like Purify */
312 2203 : sp->cinfo.c.client_data = NULL;
313 :
314 2203 : return CALLVJPEG(sp, jpeg_create_compress(&sp->cinfo.c));
315 : }
316 :
317 195 : static int TIFFjpeg_create_decompress(JPEGState *sp)
318 : {
319 : /* initialize JPEG error handling */
320 195 : sp->cinfo.d.err = jpeg_std_error(&sp->err);
321 195 : sp->err.error_exit = TIFFjpeg_error_exit;
322 195 : sp->err.output_message = TIFFjpeg_output_message;
323 :
324 : /* set client_data to avoid UMR warning from tools like Purify */
325 195 : sp->cinfo.d.client_data = NULL;
326 :
327 195 : return CALLVJPEG(sp, jpeg_create_decompress(&sp->cinfo.d));
328 : }
329 :
330 2203 : static int TIFFjpeg_set_defaults(JPEGState *sp)
331 : {
332 2203 : return CALLVJPEG(sp, jpeg_set_defaults(&sp->cinfo.c));
333 : }
334 :
335 4212 : static int TIFFjpeg_set_colorspace(JPEGState *sp, J_COLOR_SPACE colorspace)
336 : {
337 4212 : return CALLVJPEG(sp, jpeg_set_colorspace(&sp->cinfo.c, colorspace));
338 : }
339 :
340 5391 : static int TIFFjpeg_set_quality(JPEGState *sp, int quality,
341 : boolean force_baseline)
342 : {
343 5391 : return CALLVJPEG(sp,
344 : jpeg_set_quality(&sp->cinfo.c, quality, force_baseline));
345 : }
346 :
347 1179 : static int TIFFjpeg_suppress_tables(JPEGState *sp, boolean suppress)
348 : {
349 1179 : return CALLVJPEG(sp, jpeg_suppress_tables(&sp->cinfo.c, suppress));
350 : }
351 :
352 4212 : static int TIFFjpeg_start_compress(JPEGState *sp, boolean write_all_tables)
353 : {
354 4212 : return CALLVJPEG(sp, jpeg_start_compress(&sp->cinfo.c, write_all_tables));
355 : }
356 :
357 178279 : static int TIFFjpeg_write_scanlines(JPEGState *sp, TIFF_JSAMPARRAY scanlines,
358 : int num_lines)
359 : {
360 : #if defined(HAVE_JPEGTURBO_DUAL_MODE_8_12) && BITS_IN_JSAMPLE == 12
361 : return CALLJPEG(sp, -1,
362 : (int)jpeg12_write_scanlines(&sp->cinfo.c, scanlines,
363 : (JDIMENSION)num_lines));
364 : #else
365 178279 : return CALLJPEG(sp, -1,
366 : (int)jpeg_write_scanlines(&sp->cinfo.c, scanlines,
367 : (JDIMENSION)num_lines));
368 : #endif
369 : }
370 :
371 0 : static int TIFFjpeg_write_raw_data(JPEGState *sp, TIFF_JSAMPIMAGE data,
372 : int num_lines)
373 : {
374 : #if defined(HAVE_JPEGTURBO_DUAL_MODE_8_12) && BITS_IN_JSAMPLE == 12
375 : return CALLJPEG(
376 : sp, -1,
377 : (int)jpeg12_write_raw_data(&sp->cinfo.c, data, (JDIMENSION)num_lines));
378 : #else
379 0 : return CALLJPEG(
380 : sp, -1,
381 : (int)jpeg_write_raw_data(&sp->cinfo.c, data, (JDIMENSION)num_lines));
382 : #endif
383 : }
384 :
385 4212 : static int TIFFjpeg_finish_compress(JPEGState *sp)
386 : {
387 4212 : return CALLVJPEG(sp, jpeg_finish_compress(&sp->cinfo.c));
388 : }
389 :
390 1179 : static int TIFFjpeg_write_tables(JPEGState *sp)
391 : {
392 1179 : return CALLVJPEG(sp, jpeg_write_tables(&sp->cinfo.c));
393 : }
394 :
395 2095 : static int TIFFjpeg_read_header(JPEGState *sp, boolean require_image)
396 : {
397 2095 : return CALLJPEG(sp, -1, jpeg_read_header(&sp->cinfo.d, require_image));
398 : }
399 :
400 1909 : static int TIFFjpeg_has_multiple_scans(JPEGState *sp)
401 : {
402 1909 : return CALLJPEG(sp, 0, jpeg_has_multiple_scans(&sp->cinfo.d));
403 : }
404 :
405 1907 : static int TIFFjpeg_start_decompress(JPEGState *sp)
406 : {
407 : const char *sz_max_allowed_scan_number;
408 : /* progress monitor */
409 1907 : sp->cinfo.d.progress = &sp->progress;
410 1907 : sp->progress.progress_monitor = TIFFjpeg_progress_monitor;
411 1907 : sp->otherSettings.max_allowed_scan_number = 100;
412 1907 : sz_max_allowed_scan_number = getenv("LIBTIFF_JPEG_MAX_ALLOWED_SCAN_NUMBER");
413 1907 : if (sz_max_allowed_scan_number)
414 1 : sp->otherSettings.max_allowed_scan_number =
415 1 : atoi(sz_max_allowed_scan_number);
416 :
417 1907 : return CALLVJPEG(sp, jpeg_start_decompress(&sp->cinfo.d));
418 : }
419 :
420 114962 : static int TIFFjpeg_read_scanlines(JPEGState *sp, TIFF_JSAMPARRAY scanlines,
421 : int max_lines)
422 : {
423 : #if defined(HAVE_JPEGTURBO_DUAL_MODE_8_12) && BITS_IN_JSAMPLE == 12
424 : return CALLJPEG(sp, -1,
425 : (int)jpeg12_read_scanlines(&sp->cinfo.d, scanlines,
426 : (JDIMENSION)max_lines));
427 : #else
428 114962 : return CALLJPEG(sp, -1,
429 : (int)jpeg_read_scanlines(&sp->cinfo.d, scanlines,
430 : (JDIMENSION)max_lines));
431 : #endif
432 : }
433 :
434 0 : static int TIFFjpeg_read_raw_data(JPEGState *sp, TIFF_JSAMPIMAGE data,
435 : int max_lines)
436 : {
437 : #if defined(HAVE_JPEGTURBO_DUAL_MODE_8_12) && BITS_IN_JSAMPLE == 12
438 : return CALLJPEG(
439 : sp, -1,
440 : (int)jpeg12_read_raw_data(&sp->cinfo.d, data, (JDIMENSION)max_lines));
441 : #else
442 0 : return CALLJPEG(
443 : sp, -1,
444 : (int)jpeg_read_raw_data(&sp->cinfo.d, data, (JDIMENSION)max_lines));
445 : #endif
446 : }
447 :
448 1778 : static int TIFFjpeg_finish_decompress(JPEGState *sp)
449 : {
450 1778 : return CALLJPEG(sp, -1, (int)jpeg_finish_decompress(&sp->cinfo.d));
451 : }
452 :
453 1908 : static int TIFFjpeg_abort(JPEGState *sp)
454 : {
455 1908 : return CALLVJPEG(sp, jpeg_abort(&sp->cinfo.comm));
456 : }
457 :
458 2398 : static int TIFFjpeg_destroy(JPEGState *sp)
459 : {
460 2398 : return CALLVJPEG(sp, jpeg_destroy(&sp->cinfo.comm));
461 : }
462 :
463 0 : static JSAMPARRAY TIFFjpeg_alloc_sarray(JPEGState *sp, int pool_id,
464 : JDIMENSION samplesperrow,
465 : JDIMENSION numrows)
466 : {
467 0 : return CALLJPEG(sp, (JSAMPARRAY)NULL,
468 : (*sp->cinfo.comm.mem->alloc_sarray)(
469 : &sp->cinfo.comm, pool_id, samplesperrow, numrows));
470 : }
471 :
472 : /*
473 : * JPEG library destination data manager.
474 : * These routines direct compressed data from libjpeg into the
475 : * libtiff output buffer.
476 : */
477 :
478 4212 : static void std_init_destination(j_compress_ptr cinfo)
479 : {
480 4212 : JPEGState *sp = (JPEGState *)cinfo;
481 4212 : TIFF *tif = sp->tif;
482 :
483 4212 : sp->dest.next_output_byte = (JOCTET *)tif->tif_rawdata;
484 4212 : sp->dest.free_in_buffer = (size_t)tif->tif_rawdatasize;
485 4212 : }
486 :
487 0 : static boolean std_empty_output_buffer(j_compress_ptr cinfo)
488 : {
489 0 : JPEGState *sp = (JPEGState *)cinfo;
490 0 : TIFF *tif = sp->tif;
491 :
492 : /* the entire buffer has been filled */
493 0 : tif->tif_rawcc = tif->tif_rawdatasize;
494 :
495 : #ifdef IPPJ_HUFF
496 : /*
497 : * The Intel IPP performance library does not necessarily fill up
498 : * the whole output buffer on each pass, so only dump out the parts
499 : * that have been filled.
500 : * http://trac.osgeo.org/gdal/wiki/JpegIPP
501 : */
502 : if (sp->dest.free_in_buffer >= 0)
503 : {
504 : tif->tif_rawcc = tif->tif_rawdatasize - sp->dest.free_in_buffer;
505 : }
506 : #endif
507 :
508 0 : if (!TIFFFlushData1(tif))
509 0 : return FALSE;
510 0 : sp->dest.next_output_byte = (JOCTET *)tif->tif_rawdata;
511 0 : sp->dest.free_in_buffer = (size_t)tif->tif_rawdatasize;
512 :
513 0 : return (TRUE);
514 : }
515 :
516 4212 : static void std_term_destination(j_compress_ptr cinfo)
517 : {
518 4212 : JPEGState *sp = (JPEGState *)cinfo;
519 4212 : TIFF *tif = sp->tif;
520 :
521 4212 : tif->tif_rawcp = (uint8_t *)sp->dest.next_output_byte;
522 4212 : tif->tif_rawcc = tif->tif_rawdatasize - (tmsize_t)sp->dest.free_in_buffer;
523 : /* NB: libtiff does the final buffer flush */
524 4212 : }
525 :
526 2203 : static void TIFFjpeg_data_dest(JPEGState *sp, TIFF *tif)
527 : {
528 : (void)tif;
529 2203 : sp->cinfo.c.dest = &sp->dest;
530 2203 : sp->dest.init_destination = std_init_destination;
531 2203 : sp->dest.empty_output_buffer = std_empty_output_buffer;
532 2203 : sp->dest.term_destination = std_term_destination;
533 2203 : }
534 :
535 : /*
536 : * Alternate destination manager for outputting to JPEGTables field.
537 : */
538 :
539 1179 : static void tables_init_destination(j_compress_ptr cinfo)
540 : {
541 1179 : JPEGState *sp = (JPEGState *)cinfo;
542 :
543 : /* while building, otherSettings.jpegtables_length is allocated buffer size
544 : */
545 1179 : sp->dest.next_output_byte = (JOCTET *)sp->otherSettings.jpegtables;
546 1179 : sp->dest.free_in_buffer = (size_t)sp->otherSettings.jpegtables_length;
547 1179 : }
548 :
549 0 : static boolean tables_empty_output_buffer(j_compress_ptr cinfo)
550 : {
551 0 : JPEGState *sp = (JPEGState *)cinfo;
552 : void *newbuf;
553 :
554 : /* the entire buffer has been filled; enlarge it by 1000 bytes */
555 : newbuf =
556 0 : _TIFFreallocExt(sp->tif, (void *)sp->otherSettings.jpegtables,
557 0 : (tmsize_t)sp->otherSettings.jpegtables_length + 1000);
558 0 : if (newbuf == NULL)
559 0 : ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 100);
560 0 : sp->dest.next_output_byte =
561 0 : (JOCTET *)newbuf + sp->otherSettings.jpegtables_length;
562 0 : sp->dest.free_in_buffer = (size_t)1000;
563 0 : sp->otherSettings.jpegtables = newbuf;
564 0 : sp->otherSettings.jpegtables_length += 1000;
565 0 : return (TRUE);
566 : }
567 :
568 1179 : static void tables_term_destination(j_compress_ptr cinfo)
569 : {
570 1179 : JPEGState *sp = (JPEGState *)cinfo;
571 :
572 : /* set tables length to number of bytes actually emitted */
573 1179 : sp->otherSettings.jpegtables_length -= (uint32_t)sp->dest.free_in_buffer;
574 1179 : }
575 :
576 1179 : static int TIFFjpeg_tables_dest(JPEGState *sp, TIFF *tif)
577 : {
578 : (void)tif;
579 : /*
580 : * Allocate a working buffer for building tables.
581 : * Initial size is 1000 bytes, which is usually adequate.
582 : */
583 1179 : if (sp->otherSettings.jpegtables)
584 113 : _TIFFfreeExt(tif, sp->otherSettings.jpegtables);
585 1179 : sp->otherSettings.jpegtables_length = 1000;
586 2358 : sp->otherSettings.jpegtables = (void *)_TIFFmallocExt(
587 1179 : tif, (tmsize_t)sp->otherSettings.jpegtables_length);
588 1179 : if (sp->otherSettings.jpegtables == NULL)
589 : {
590 0 : sp->otherSettings.jpegtables_length = 0;
591 0 : TIFFErrorExtR(sp->tif, "TIFFjpeg_tables_dest",
592 : "No space for JPEGTables");
593 0 : return (0);
594 : }
595 1179 : sp->cinfo.c.dest = &sp->dest;
596 1179 : sp->dest.init_destination = tables_init_destination;
597 1179 : sp->dest.empty_output_buffer = tables_empty_output_buffer;
598 1179 : sp->dest.term_destination = tables_term_destination;
599 1179 : return (1);
600 : }
601 :
602 : /*
603 : * JPEG library source data manager.
604 : * These routines supply compressed data to libjpeg.
605 : */
606 :
607 1910 : static void std_init_source(j_decompress_ptr cinfo)
608 : {
609 1910 : JPEGState *sp = (JPEGState *)cinfo;
610 1910 : TIFF *tif = sp->tif;
611 :
612 1910 : sp->src.next_input_byte = (const JOCTET *)tif->tif_rawdata;
613 1910 : sp->src.bytes_in_buffer = (size_t)tif->tif_rawcc;
614 1910 : }
615 :
616 0 : static boolean std_fill_input_buffer(j_decompress_ptr cinfo)
617 : {
618 0 : JPEGState *sp = (JPEGState *)cinfo;
619 : static const JOCTET dummy_EOI[2] = {0xFF, JPEG_EOI};
620 :
621 : #ifdef IPPJ_HUFF
622 : /*
623 : * The Intel IPP performance library does not necessarily read the whole
624 : * input buffer in one pass, so it is possible to get here with data
625 : * yet to read.
626 : *
627 : * We just return without doing anything, until the entire buffer has
628 : * been read.
629 : * http://trac.osgeo.org/gdal/wiki/JpegIPP
630 : */
631 : if (sp->src.bytes_in_buffer > 0)
632 : {
633 : return (TRUE);
634 : }
635 : #endif
636 :
637 : /*
638 : * Normally the whole strip/tile is read and so we don't need to do
639 : * a fill. In the case of CHUNKY_STRIP_READ_SUPPORT we might not have
640 : * all the data, but the rawdata is refreshed between scanlines and
641 : * we push this into the io machinery in JPEGDecode().
642 : * http://trac.osgeo.org/gdal/ticket/3894
643 : */
644 :
645 0 : WARNMS(cinfo, JWRN_JPEG_EOF);
646 : /* insert a fake EOI marker */
647 0 : sp->src.next_input_byte = dummy_EOI;
648 0 : sp->src.bytes_in_buffer = 2;
649 0 : return (TRUE);
650 : }
651 :
652 0 : static void std_skip_input_data(j_decompress_ptr cinfo, long num_bytes)
653 : {
654 0 : JPEGState *sp = (JPEGState *)cinfo;
655 :
656 0 : if (num_bytes > 0)
657 : {
658 0 : if ((size_t)num_bytes > sp->src.bytes_in_buffer)
659 : {
660 : /* oops, buffer overrun */
661 0 : (void)std_fill_input_buffer(cinfo);
662 : }
663 : else
664 : {
665 0 : sp->src.next_input_byte += (size_t)num_bytes;
666 0 : sp->src.bytes_in_buffer -= (size_t)num_bytes;
667 : }
668 : }
669 0 : }
670 :
671 1778 : static void std_term_source(j_decompress_ptr cinfo)
672 : {
673 : /* No work necessary here */
674 : (void)cinfo;
675 1778 : }
676 :
677 380 : static void TIFFjpeg_data_src(JPEGState *sp)
678 : {
679 380 : sp->cinfo.d.src = &sp->src;
680 380 : sp->src.init_source = std_init_source;
681 380 : sp->src.fill_input_buffer = std_fill_input_buffer;
682 380 : sp->src.skip_input_data = std_skip_input_data;
683 380 : sp->src.resync_to_restart = jpeg_resync_to_restart;
684 380 : sp->src.term_source = std_term_source;
685 380 : sp->src.bytes_in_buffer = 0; /* for safety */
686 380 : sp->src.next_input_byte = NULL;
687 380 : }
688 :
689 : /*
690 : * Alternate source manager for reading from JPEGTables.
691 : * We can share all the code except for the init routine.
692 : */
693 :
694 185 : static void tables_init_source(j_decompress_ptr cinfo)
695 : {
696 185 : JPEGState *sp = (JPEGState *)cinfo;
697 :
698 185 : sp->src.next_input_byte = (const JOCTET *)sp->otherSettings.jpegtables;
699 185 : sp->src.bytes_in_buffer = (size_t)sp->otherSettings.jpegtables_length;
700 185 : }
701 :
702 185 : static void TIFFjpeg_tables_src(JPEGState *sp)
703 : {
704 185 : TIFFjpeg_data_src(sp);
705 185 : sp->src.init_source = tables_init_source;
706 185 : }
707 :
708 : /*
709 : * Allocate downsampled-data buffers needed for downsampled I/O.
710 : * We use values computed in jpeg_start_compress or jpeg_start_decompress.
711 : * We use libjpeg's allocator so that buffers will be released automatically
712 : * when done with strip/tile.
713 : * This is also a handy place to compute samplesperclump, bytesperline.
714 : */
715 0 : static int alloc_downsampled_buffers(TIFF *tif, jpeg_component_info *comp_info,
716 : int num_components)
717 : {
718 0 : JPEGState *sp = JState(tif);
719 : int ci;
720 : jpeg_component_info *compptr;
721 : TIFF_JSAMPARRAY buf;
722 0 : int samples_per_clump = 0;
723 :
724 0 : for (ci = 0, compptr = comp_info; ci < num_components; ci++, compptr++)
725 : {
726 0 : samples_per_clump += compptr->h_samp_factor * compptr->v_samp_factor;
727 0 : buf = (TIFF_JSAMPARRAY)TIFFjpeg_alloc_sarray(
728 0 : sp, JPOOL_IMAGE, compptr->width_in_blocks * DCTSIZE,
729 0 : (JDIMENSION)(compptr->v_samp_factor * DCTSIZE));
730 0 : if (buf == NULL)
731 0 : return (0);
732 0 : sp->ds_buffer[ci] = buf;
733 : }
734 0 : sp->samplesperclump = samples_per_clump;
735 0 : return (1);
736 : }
737 :
738 : /*
739 : * JPEG Decoding.
740 : */
741 :
742 : #ifdef CHECK_JPEG_YCBCR_SUBSAMPLING
743 :
744 : #define JPEG_MARKER_SOF0 0xC0
745 : #define JPEG_MARKER_SOF1 0xC1
746 : #define JPEG_MARKER_SOF2 0xC2
747 : #define JPEG_MARKER_SOF9 0xC9
748 : #define JPEG_MARKER_SOF10 0xCA
749 : #define JPEG_MARKER_DHT 0xC4
750 : #define JPEG_MARKER_SOI 0xD8
751 : #define JPEG_MARKER_SOS 0xDA
752 : #define JPEG_MARKER_DQT 0xDB
753 : #define JPEG_MARKER_DRI 0xDD
754 : #define JPEG_MARKER_APP0 0xE0
755 : #define JPEG_MARKER_COM 0xFE
756 : struct JPEGFixupTagsSubsamplingData
757 : {
758 : TIFF *tif;
759 : void *buffer;
760 : uint32_t buffersize;
761 : uint8_t *buffercurrentbyte;
762 : uint32_t bufferbytesleft;
763 : uint64_t fileoffset;
764 : uint64_t filebytesleft;
765 : uint8_t filepositioned;
766 : };
767 : static void JPEGFixupTagsSubsampling(TIFF *tif);
768 : static int
769 : JPEGFixupTagsSubsamplingSec(struct JPEGFixupTagsSubsamplingData *data);
770 : static int
771 : JPEGFixupTagsSubsamplingReadByte(struct JPEGFixupTagsSubsamplingData *data,
772 : uint8_t *result);
773 : static int
774 : JPEGFixupTagsSubsamplingReadWord(struct JPEGFixupTagsSubsamplingData *data,
775 : uint16_t *result);
776 : static void
777 : JPEGFixupTagsSubsamplingSkip(struct JPEGFixupTagsSubsamplingData *data,
778 : uint16_t skiplength);
779 :
780 : #endif
781 :
782 3089 : static int JPEGFixupTags(TIFF *tif)
783 : {
784 : #ifdef CHECK_JPEG_YCBCR_SUBSAMPLING
785 3089 : JPEGState *sp = JState(tif);
786 3089 : if ((tif->tif_dir.td_photometric == PHOTOMETRIC_YCBCR) &&
787 1397 : (tif->tif_dir.td_planarconfig == PLANARCONFIG_CONTIG) &&
788 1397 : (tif->tif_dir.td_samplesperpixel == 3) &&
789 1397 : !sp->otherSettings.ycbcrsampling_fetched)
790 72 : JPEGFixupTagsSubsampling(tif);
791 : #endif
792 :
793 3089 : return (1);
794 : }
795 :
796 : #ifdef CHECK_JPEG_YCBCR_SUBSAMPLING
797 :
798 72 : static void JPEGFixupTagsSubsampling(TIFF *tif)
799 : {
800 : /*
801 : * Some JPEG-in-TIFF produces do not emit the YCBCRSUBSAMPLING values in
802 : * the TIFF tags, but still use non-default (2,2) values within the jpeg
803 : * data stream itself. In order for TIFF applications to work properly
804 : * - for instance to get the strip buffer size right - it is imperative
805 : * that the subsampling be available before we start reading the image
806 : * data normally. This function will attempt to analyze the first strip in
807 : * order to get the sampling values from the jpeg data stream.
808 : *
809 : * Note that JPEGPreDeocode() will produce a fairly loud warning when the
810 : * discovered sampling does not match the default sampling (2,2) or whatever
811 : * was actually in the tiff tags.
812 : *
813 : * See the bug in bugzilla for details:
814 : *
815 : * http://bugzilla.remotesensing.org/show_bug.cgi?id=168
816 : *
817 : * Frank Warmerdam, July 2002
818 : * Joris Van Damme, May 2007
819 : */
820 : static const char module[] = "JPEGFixupTagsSubsampling";
821 : struct JPEGFixupTagsSubsamplingData m;
822 72 : uint64_t fileoffset = TIFFGetStrileOffset(tif, 0);
823 :
824 72 : if (fileoffset == 0)
825 : {
826 : /* Do not even try to check if the first strip/tile does not
827 : yet exist, as occurs when GDAL has created a new NULL file
828 : for instance. */
829 0 : return;
830 : }
831 :
832 72 : m.tif = tif;
833 72 : m.buffersize = 2048;
834 72 : m.buffer = _TIFFmallocExt(tif, m.buffersize);
835 72 : if (m.buffer == NULL)
836 : {
837 0 : TIFFWarningExtR(tif, module,
838 : "Unable to allocate memory for auto-correcting of "
839 : "subsampling values; auto-correcting skipped");
840 0 : return;
841 : }
842 72 : m.buffercurrentbyte = NULL;
843 72 : m.bufferbytesleft = 0;
844 72 : m.fileoffset = fileoffset;
845 72 : m.filepositioned = 0;
846 72 : m.filebytesleft = TIFFGetStrileByteCount(tif, 0);
847 72 : if (!JPEGFixupTagsSubsamplingSec(&m))
848 0 : TIFFWarningExtR(
849 : tif, module,
850 : "Unable to auto-correct subsampling values, likely corrupt JPEG "
851 : "compressed data in first strip/tile; auto-correcting skipped");
852 72 : _TIFFfreeExt(tif, m.buffer);
853 : }
854 :
855 : static int
856 236 : JPEGFixupTagsSubsamplingSec(struct JPEGFixupTagsSubsamplingData *data)
857 : {
858 : static const char module[] = "JPEGFixupTagsSubsamplingSec";
859 : uint8_t m;
860 164 : while (1)
861 : {
862 : while (1)
863 : {
864 236 : if (!JPEGFixupTagsSubsamplingReadByte(data, &m))
865 0 : return (0);
866 236 : if (m == 255)
867 236 : break;
868 : }
869 : while (1)
870 : {
871 236 : if (!JPEGFixupTagsSubsamplingReadByte(data, &m))
872 0 : return (0);
873 236 : if (m != 255)
874 236 : break;
875 : }
876 236 : switch (m)
877 : {
878 72 : case JPEG_MARKER_SOI:
879 : /* this type of marker has no data and should be skipped */
880 72 : break;
881 92 : case JPEG_MARKER_COM:
882 : case JPEG_MARKER_APP0:
883 : case JPEG_MARKER_APP0 + 1:
884 : case JPEG_MARKER_APP0 + 2:
885 : case JPEG_MARKER_APP0 + 3:
886 : case JPEG_MARKER_APP0 + 4:
887 : case JPEG_MARKER_APP0 + 5:
888 : case JPEG_MARKER_APP0 + 6:
889 : case JPEG_MARKER_APP0 + 7:
890 : case JPEG_MARKER_APP0 + 8:
891 : case JPEG_MARKER_APP0 + 9:
892 : case JPEG_MARKER_APP0 + 10:
893 : case JPEG_MARKER_APP0 + 11:
894 : case JPEG_MARKER_APP0 + 12:
895 : case JPEG_MARKER_APP0 + 13:
896 : case JPEG_MARKER_APP0 + 14:
897 : case JPEG_MARKER_APP0 + 15:
898 : case JPEG_MARKER_DQT:
899 : case JPEG_MARKER_SOS:
900 : case JPEG_MARKER_DHT:
901 : case JPEG_MARKER_DRI:
902 : /* this type of marker has data, but it has no use to us and
903 : * should be skipped */
904 : {
905 : uint16_t n;
906 92 : if (!JPEGFixupTagsSubsamplingReadWord(data, &n))
907 0 : return (0);
908 92 : if (n < 2)
909 0 : return (0);
910 92 : n = (uint16_t)(n - 2);
911 92 : if (n > 0)
912 92 : JPEGFixupTagsSubsamplingSkip(data, n);
913 : }
914 92 : break;
915 72 : case JPEG_MARKER_SOF0: /* Baseline sequential Huffman */
916 : case JPEG_MARKER_SOF1: /* Extended sequential Huffman */
917 : case JPEG_MARKER_SOF2: /* Progressive Huffman: normally not allowed
918 : by TechNote, but that doesn't hurt
919 : supporting it */
920 : case JPEG_MARKER_SOF9: /* Extended sequential arithmetic */
921 : case JPEG_MARKER_SOF10: /* Progressive arithmetic: normally not
922 : allowed by TechNote, but that doesn't
923 : hurt supporting it */
924 : /* this marker contains the subsampling factors we're scanning
925 : * for */
926 : {
927 : uint16_t n;
928 : uint16_t o;
929 : uint8_t p;
930 : uint8_t ph, pv;
931 72 : if (!JPEGFixupTagsSubsamplingReadWord(data, &n))
932 0 : return (0);
933 72 : if (n != 8 + data->tif->tif_dir.td_samplesperpixel * 3)
934 0 : return (0);
935 72 : JPEGFixupTagsSubsamplingSkip(data, 7);
936 72 : if (!JPEGFixupTagsSubsamplingReadByte(data, &p))
937 0 : return (0);
938 72 : ph = (p >> 4);
939 72 : pv = (p & 15);
940 72 : JPEGFixupTagsSubsamplingSkip(data, 1);
941 216 : for (o = 1; o < data->tif->tif_dir.td_samplesperpixel; o++)
942 : {
943 144 : JPEGFixupTagsSubsamplingSkip(data, 1);
944 144 : if (!JPEGFixupTagsSubsamplingReadByte(data, &p))
945 0 : return (0);
946 144 : if (p != 0x11)
947 : {
948 0 : TIFFWarningExtR(data->tif, module,
949 : "Subsampling values inside JPEG "
950 : "compressed data "
951 : "have no TIFF equivalent, "
952 : "auto-correction of TIFF "
953 : "subsampling values failed");
954 0 : return (1);
955 : }
956 144 : JPEGFixupTagsSubsamplingSkip(data, 1);
957 : }
958 72 : if (((ph != 1) && (ph != 2) && (ph != 4)) ||
959 72 : ((pv != 1) && (pv != 2) && (pv != 4)))
960 : {
961 0 : TIFFWarningExtR(data->tif, module,
962 : "Subsampling values inside JPEG "
963 : "compressed data have no TIFF "
964 : "equivalent, auto-correction of TIFF "
965 : "subsampling values failed");
966 0 : return (1);
967 : }
968 72 : if ((ph != data->tif->tif_dir.td_ycbcrsubsampling[0]) ||
969 72 : (pv != data->tif->tif_dir.td_ycbcrsubsampling[1]))
970 : {
971 0 : TIFFWarningExtR(
972 : data->tif, module,
973 : "Auto-corrected former TIFF subsampling values "
974 : "[%" PRIu16 ",%" PRIu16
975 : "] to match subsampling values inside JPEG "
976 : "compressed data [%" PRIu8 ",%" PRIu8 "]",
977 0 : data->tif->tif_dir.td_ycbcrsubsampling[0],
978 0 : data->tif->tif_dir.td_ycbcrsubsampling[1], ph, pv);
979 0 : data->tif->tif_dir.td_ycbcrsubsampling[0] = ph;
980 0 : data->tif->tif_dir.td_ycbcrsubsampling[1] = pv;
981 : }
982 : }
983 72 : return (1);
984 0 : default:
985 0 : return (0);
986 : }
987 : }
988 : }
989 :
990 : static int
991 1016 : JPEGFixupTagsSubsamplingReadByte(struct JPEGFixupTagsSubsamplingData *data,
992 : uint8_t *result)
993 : {
994 1016 : if (data->bufferbytesleft == 0)
995 : {
996 : uint32_t m;
997 72 : if (data->filebytesleft == 0)
998 0 : return (0);
999 72 : if (!data->filepositioned)
1000 : {
1001 72 : if (TIFFSeekFile(data->tif, data->fileoffset, SEEK_SET) ==
1002 : (toff_t)-1)
1003 : {
1004 0 : return 0;
1005 : }
1006 72 : data->filepositioned = 1;
1007 : }
1008 72 : m = data->buffersize;
1009 72 : if ((uint64_t)m > data->filebytesleft)
1010 0 : m = (uint32_t)data->filebytesleft;
1011 72 : assert(m < 0x80000000UL);
1012 72 : if (TIFFReadFile(data->tif, data->buffer, (tmsize_t)m) != (tmsize_t)m)
1013 0 : return (0);
1014 72 : data->buffercurrentbyte = (uint8_t *)data->buffer;
1015 72 : data->bufferbytesleft = m;
1016 72 : data->fileoffset += m;
1017 72 : data->filebytesleft -= m;
1018 : }
1019 1016 : *result = *data->buffercurrentbyte;
1020 1016 : data->buffercurrentbyte++;
1021 1016 : data->bufferbytesleft--;
1022 1016 : return (1);
1023 : }
1024 :
1025 : static int
1026 164 : JPEGFixupTagsSubsamplingReadWord(struct JPEGFixupTagsSubsamplingData *data,
1027 : uint16_t *result)
1028 : {
1029 : uint8_t ma;
1030 : uint8_t mb;
1031 164 : if (!JPEGFixupTagsSubsamplingReadByte(data, &ma))
1032 0 : return (0);
1033 164 : if (!JPEGFixupTagsSubsamplingReadByte(data, &mb))
1034 0 : return (0);
1035 164 : *result = (uint16_t)((ma << 8) | mb);
1036 164 : return (1);
1037 : }
1038 :
1039 : static void
1040 524 : JPEGFixupTagsSubsamplingSkip(struct JPEGFixupTagsSubsamplingData *data,
1041 : uint16_t skiplength)
1042 : {
1043 524 : if ((uint32_t)skiplength <= data->bufferbytesleft)
1044 : {
1045 524 : data->buffercurrentbyte += skiplength;
1046 524 : data->bufferbytesleft -= skiplength;
1047 : }
1048 : else
1049 : {
1050 : uint16_t m;
1051 0 : m = (uint16_t)(skiplength - data->bufferbytesleft);
1052 0 : if (m <= data->filebytesleft)
1053 : {
1054 0 : data->bufferbytesleft = 0;
1055 0 : data->fileoffset += m;
1056 0 : data->filebytesleft -= m;
1057 0 : data->filepositioned = 0;
1058 : }
1059 : else
1060 : {
1061 0 : data->bufferbytesleft = 0;
1062 0 : data->filebytesleft = 0;
1063 : }
1064 : }
1065 524 : }
1066 :
1067 : #endif
1068 :
1069 201 : static int JPEGSetupDecode(TIFF *tif)
1070 : {
1071 201 : JPEGState *sp = JState(tif);
1072 201 : TIFFDirectory *td = &tif->tif_dir;
1073 :
1074 : #if defined(JPEG_DUAL_MODE_8_12) && !defined(FROM_TIF_JPEG_12)
1075 193 : if (tif->tif_dir.td_bitspersample == 12)
1076 : {
1077 : /* We pass a pointer to a copy of otherSettings, since */
1078 : /* TIFFReInitJPEG_12() will clear sp */
1079 8 : JPEGOtherSettings savedOtherSettings = sp->otherSettings;
1080 8 : return TIFFReInitJPEG_12(tif, &savedOtherSettings, COMPRESSION_JPEG, 0);
1081 : }
1082 : #endif
1083 :
1084 193 : JPEGInitializeLibJPEG(tif, TRUE);
1085 :
1086 193 : assert(sp != NULL);
1087 193 : assert(sp->cinfo.comm.is_decompressor);
1088 :
1089 : /* Read JPEGTables if it is present */
1090 193 : if (TIFFFieldSet(tif, FIELD_JPEGTABLES))
1091 : {
1092 185 : TIFFjpeg_tables_src(sp);
1093 185 : if (TIFFjpeg_read_header(sp, FALSE) != JPEG_HEADER_TABLES_ONLY)
1094 : {
1095 0 : TIFFErrorExtR(tif, "JPEGSetupDecode", "Bogus JPEGTables field");
1096 0 : return (0);
1097 : }
1098 : }
1099 :
1100 : /* Grab parameters that are same for all strips/tiles */
1101 193 : sp->photometric = td->td_photometric;
1102 193 : switch (sp->photometric)
1103 : {
1104 110 : case PHOTOMETRIC_YCBCR:
1105 110 : sp->h_sampling = td->td_ycbcrsubsampling[0];
1106 110 : sp->v_sampling = td->td_ycbcrsubsampling[1];
1107 110 : break;
1108 83 : default:
1109 : /* TIFF 6.0 forbids subsampling of all other color spaces */
1110 83 : sp->h_sampling = 1;
1111 83 : sp->v_sampling = 1;
1112 83 : break;
1113 : }
1114 :
1115 : /* Set up for reading normal data */
1116 193 : TIFFjpeg_data_src(sp);
1117 193 : tif->tif_postdecode = _TIFFNoPostDecode; /* override byte swapping */
1118 193 : return (1);
1119 : }
1120 :
1121 : /* Returns 1 if the full strip should be read, even when doing scanline per */
1122 : /* scanline decoding. This happens when the JPEG stream uses multiple scans. */
1123 : /* Currently only called in CHUNKY_STRIP_READ_SUPPORT mode through */
1124 : /* scanline interface. */
1125 : /* Only reads tif->tif_dir.td_bitspersample, tif->tif_rawdata and */
1126 : /* tif->tif_rawcc members. */
1127 : /* Can be called independently of the usual setup/predecode/decode states */
1128 2 : int TIFFJPEGIsFullStripRequired(TIFF *tif)
1129 : {
1130 : int ret;
1131 : JPEGState state;
1132 :
1133 : #if defined(JPEG_DUAL_MODE_8_12) && !defined(FROM_TIF_JPEG_12)
1134 2 : if (tif->tif_dir.td_bitspersample == 12)
1135 0 : return TIFFJPEGIsFullStripRequired_12(tif);
1136 : #endif
1137 :
1138 2 : memset(&state, 0, sizeof(JPEGState));
1139 2 : state.tif = tif;
1140 :
1141 2 : TIFFjpeg_create_decompress(&state);
1142 :
1143 2 : TIFFjpeg_data_src(&state);
1144 :
1145 2 : if (TIFFjpeg_read_header(&state, TRUE) != JPEG_HEADER_OK)
1146 : {
1147 0 : TIFFjpeg_destroy(&state);
1148 0 : return (0);
1149 : }
1150 2 : ret = TIFFjpeg_has_multiple_scans(&state);
1151 :
1152 2 : TIFFjpeg_destroy(&state);
1153 :
1154 2 : return ret;
1155 : }
1156 :
1157 6120 : static int JPEGComputeStrileWidthHeightBytesPerLine(TIFF *tif, uint16_t s)
1158 : {
1159 6120 : JPEGState *sp = JState(tif);
1160 6120 : TIFFDirectory *td = &tif->tif_dir;
1161 :
1162 : /*
1163 : * Check image parameters and set decompression parameters.
1164 : */
1165 6120 : if (isTiled(tif))
1166 : {
1167 1131 : sp->strile_width = td->td_tilewidth;
1168 1131 : sp->strile_height = td->td_tilelength;
1169 1131 : sp->bytesperline = TIFFTileRowSize(tif);
1170 : }
1171 : else
1172 : {
1173 4989 : sp->strile_width = td->td_imagewidth;
1174 4989 : sp->strile_height = td->td_imagelength - tif->tif_dir.td_row;
1175 4989 : if (sp->strile_height > td->td_rowsperstrip)
1176 2717 : sp->strile_height = td->td_rowsperstrip;
1177 4989 : sp->bytesperline = TIFFScanlineSize(tif);
1178 : }
1179 6120 : if (td->td_planarconfig == PLANARCONFIG_SEPARATE && s > 0)
1180 : {
1181 : /*
1182 : * For PC 2, scale down the expected strip/tile size
1183 : * to match a downsampled component
1184 : */
1185 302 : if (sp->h_sampling == 0 || sp->v_sampling == 0)
1186 : {
1187 0 : TIFFErrorExtR(tif, "JPEGComputeStrileWidthHeightBytesPerLine",
1188 : "JPEG horizontal or vertical sampling is zero");
1189 0 : return (0);
1190 : }
1191 302 : sp->strile_width = TIFFhowmany_32(sp->strile_width, sp->h_sampling);
1192 302 : sp->strile_height = TIFFhowmany_32(sp->strile_height, sp->v_sampling);
1193 : }
1194 :
1195 6120 : return 1;
1196 : }
1197 :
1198 : /*
1199 : * Set up for decoding a strip or tile.
1200 : */
1201 1908 : /*ARGSUSED*/ static int JPEGPreDecode(TIFF *tif, uint16_t s)
1202 : {
1203 1908 : JPEGState *sp = JState(tif);
1204 1908 : TIFFDirectory *td = &tif->tif_dir;
1205 : static const char module[] = "JPEGPreDecode";
1206 : int downsampled_output;
1207 : int ci;
1208 :
1209 1908 : assert(sp != NULL);
1210 :
1211 1908 : if (sp->cinfo.comm.is_decompressor == 0)
1212 : {
1213 14 : tif->tif_setupdecode(tif);
1214 : }
1215 :
1216 1908 : assert(sp->cinfo.comm.is_decompressor);
1217 : /*
1218 : * Reset decoder state from any previous strip/tile,
1219 : * in case application didn't read the whole strip.
1220 : */
1221 1908 : if (!TIFFjpeg_abort(sp))
1222 0 : return (0);
1223 : /*
1224 : * Read the header for this strip/tile.
1225 : */
1226 :
1227 1908 : if (TIFFjpeg_read_header(sp, TRUE) != JPEG_HEADER_OK)
1228 0 : return (0);
1229 :
1230 1908 : tif->tif_rawcp = (uint8_t *)sp->src.next_input_byte;
1231 1908 : tif->tif_rawcc = (tmsize_t)sp->src.bytes_in_buffer;
1232 :
1233 1908 : if (!JPEGComputeStrileWidthHeightBytesPerLine(tif, s))
1234 0 : return 0;
1235 :
1236 1908 : if (sp->cinfo.d.image_width < sp->strile_width ||
1237 1908 : sp->cinfo.d.image_height < sp->strile_height)
1238 : {
1239 0 : TIFFWarningExtR(tif, module,
1240 : "Improper JPEG strip/tile size, "
1241 : "expected %" PRIu32 "x%" PRIu32 ", got %ux%u",
1242 : sp->strile_width, sp->strile_height,
1243 : sp->cinfo.d.image_width, sp->cinfo.d.image_height);
1244 : }
1245 1908 : if (sp->cinfo.d.image_width == sp->strile_width &&
1246 1907 : sp->cinfo.d.image_height > sp->strile_height &&
1247 2 : tif->tif_dir.td_row + sp->strile_height == td->td_imagelength &&
1248 2 : !isTiled(tif))
1249 : {
1250 : /* Some files have a last strip, that should be truncated, */
1251 : /* but their JPEG codestream has still the maximum strip */
1252 : /* height. Warn about this as this is non compliant, but */
1253 : /* we can safely recover from that. */
1254 2 : TIFFWarningExtR(tif, module,
1255 : "JPEG strip size exceeds expected dimensions,"
1256 : " expected %" PRIu32 "x%" PRIu32 ", got %ux%u",
1257 : sp->strile_width, sp->strile_height,
1258 : sp->cinfo.d.image_width, sp->cinfo.d.image_height);
1259 : }
1260 1906 : else if (sp->cinfo.d.image_width > sp->strile_width ||
1261 1905 : sp->cinfo.d.image_height > sp->strile_height)
1262 : {
1263 : /*
1264 : * This case could be dangerous, if the strip or tile size has
1265 : * been reported as less than the amount of data jpeg will
1266 : * return, some potential security issues arise. Catch this
1267 : * case and error out.
1268 : */
1269 1 : TIFFErrorExtR(tif, module,
1270 : "JPEG strip/tile size exceeds expected dimensions,"
1271 : " expected %" PRIu32 "x%" PRIu32 ", got %ux%u",
1272 : sp->strile_width, sp->strile_height,
1273 : sp->cinfo.d.image_width, sp->cinfo.d.image_height);
1274 1 : return (0);
1275 : }
1276 1907 : if (sp->cinfo.d.num_components !=
1277 3699 : (td->td_planarconfig == PLANARCONFIG_CONTIG ? td->td_samplesperpixel
1278 1907 : : 1))
1279 : {
1280 0 : TIFFErrorExtR(tif, module, "Improper JPEG component count");
1281 0 : return (0);
1282 : }
1283 : #ifdef JPEG_LIB_MK1
1284 : if (12 != td->td_bitspersample && 8 != td->td_bitspersample)
1285 : {
1286 : TIFFErrorExtR(tif, module, "Improper JPEG data precision");
1287 : return (0);
1288 : }
1289 : sp->cinfo.d.data_precision = td->td_bitspersample;
1290 : sp->cinfo.d.bits_in_jsample = td->td_bitspersample;
1291 : #else
1292 1907 : if (td->td_bitspersample != BITS_IN_JSAMPLE ||
1293 1907 : sp->cinfo.d.data_precision != td->td_bitspersample)
1294 : {
1295 0 : TIFFErrorExtR(tif, module, "Improper JPEG data precision");
1296 0 : return (0);
1297 : }
1298 : #endif
1299 :
1300 1907 : if (sp->cinfo.d.progressive_mode &&
1301 2 : !sp->otherSettings.has_warned_about_progressive_mode)
1302 : {
1303 2 : TIFFWarningExtR(tif, module,
1304 : "The JPEG strip/tile is encoded with progressive mode, "
1305 : "which is normally not legal for JPEG-in-TIFF.\n"
1306 : "libtiff should be able to decode it, but it might "
1307 : "cause compatibility issues with other readers");
1308 2 : sp->otherSettings.has_warned_about_progressive_mode = TRUE;
1309 : }
1310 :
1311 : /* In some cases, libjpeg needs to allocate a lot of memory */
1312 : /* http://www.libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf
1313 : */
1314 1907 : if (TIFFjpeg_has_multiple_scans(sp))
1315 : {
1316 : /* In this case libjpeg will need to allocate memory or backing */
1317 : /* store for all coefficients */
1318 : /* See call to jinit_d_coef_controller() from master_selection() */
1319 : /* in libjpeg */
1320 :
1321 : /* 1 MB for regular libjpeg usage */
1322 2 : toff_t nRequiredMemory = 1024 * 1024;
1323 :
1324 4 : for (ci = 0; ci < sp->cinfo.d.num_components; ci++)
1325 : {
1326 2 : const jpeg_component_info *compptr = &(sp->cinfo.d.comp_info[ci]);
1327 2 : if (compptr->h_samp_factor > 0 && compptr->v_samp_factor > 0)
1328 : {
1329 2 : nRequiredMemory +=
1330 2 : (toff_t)((JDIMENSION)(((int)compptr->width_in_blocks +
1331 2 : compptr->h_samp_factor - 1) /
1332 2 : compptr->h_samp_factor)) *
1333 2 : (JDIMENSION)(((int)compptr->height_in_blocks +
1334 2 : compptr->v_samp_factor - 1) /
1335 2 : compptr->v_samp_factor) *
1336 : sizeof(JBLOCK);
1337 : }
1338 : }
1339 :
1340 2 : if (sp->cinfo.d.mem->max_memory_to_use > 0 &&
1341 0 : nRequiredMemory > (toff_t)(sp->cinfo.d.mem->max_memory_to_use) &&
1342 0 : getenv("LIBTIFF_ALLOW_LARGE_LIBJPEG_MEM_ALLOC") == NULL)
1343 : {
1344 0 : TIFFErrorExtR(
1345 : tif, module,
1346 : "Reading this image would require libjpeg to allocate "
1347 : "at least %" PRIu64 " bytes. "
1348 : "This is disabled since above the %ld threshold. "
1349 : "You may override this restriction by defining the "
1350 : "LIBTIFF_ALLOW_LARGE_LIBJPEG_MEM_ALLOC environment variable, "
1351 : "or setting the JPEGMEM environment variable to a value "
1352 : "greater "
1353 : "or equal to '%" PRIu64 "M'",
1354 0 : nRequiredMemory, sp->cinfo.d.mem->max_memory_to_use,
1355 0 : (nRequiredMemory + 1000000u - 1u) / 1000000u);
1356 0 : return 0;
1357 : }
1358 : }
1359 :
1360 1907 : if (td->td_planarconfig == PLANARCONFIG_CONTIG)
1361 : {
1362 : /* Component 0 should have expected sampling factors */
1363 1792 : if (sp->cinfo.d.comp_info[0].h_samp_factor != sp->h_sampling ||
1364 1792 : sp->cinfo.d.comp_info[0].v_samp_factor != sp->v_sampling)
1365 : {
1366 0 : TIFFErrorExtR(tif, module,
1367 : "Improper JPEG sampling factors %d,%d\n"
1368 : "Apparently should be %" PRIu16 ",%" PRIu16 ".",
1369 0 : sp->cinfo.d.comp_info[0].h_samp_factor,
1370 0 : sp->cinfo.d.comp_info[0].v_samp_factor,
1371 0 : sp->h_sampling, sp->v_sampling);
1372 0 : return (0);
1373 : }
1374 : /* Rest should have sampling factors 1,1 */
1375 5151 : for (ci = 1; ci < sp->cinfo.d.num_components; ci++)
1376 : {
1377 3359 : if (sp->cinfo.d.comp_info[ci].h_samp_factor != 1 ||
1378 3359 : sp->cinfo.d.comp_info[ci].v_samp_factor != 1)
1379 : {
1380 0 : TIFFErrorExtR(tif, module, "Improper JPEG sampling factors");
1381 0 : return (0);
1382 : }
1383 : }
1384 : }
1385 : else
1386 : {
1387 : /* PC 2's single component should have sampling factors 1,1 */
1388 115 : if (sp->cinfo.d.comp_info[0].h_samp_factor != 1 ||
1389 115 : sp->cinfo.d.comp_info[0].v_samp_factor != 1)
1390 : {
1391 0 : TIFFErrorExtR(tif, module, "Improper JPEG sampling factors");
1392 0 : return (0);
1393 : }
1394 : }
1395 1907 : downsampled_output = FALSE;
1396 1907 : if (td->td_planarconfig == PLANARCONFIG_CONTIG &&
1397 1792 : sp->photometric == PHOTOMETRIC_YCBCR &&
1398 1562 : sp->otherSettings.jpegcolormode == JPEGCOLORMODE_RGB)
1399 : {
1400 : /* Convert YCbCr to RGB */
1401 1562 : sp->cinfo.d.jpeg_color_space = JCS_YCbCr;
1402 1562 : sp->cinfo.d.out_color_space = JCS_RGB;
1403 : }
1404 : else
1405 : {
1406 : /* Suppress colorspace handling */
1407 345 : sp->cinfo.d.jpeg_color_space = JCS_UNKNOWN;
1408 345 : sp->cinfo.d.out_color_space = JCS_UNKNOWN;
1409 345 : if (td->td_planarconfig == PLANARCONFIG_CONTIG &&
1410 230 : (sp->h_sampling != 1 || sp->v_sampling != 1))
1411 0 : downsampled_output = TRUE;
1412 : /* XXX what about up-sampling? */
1413 : }
1414 1907 : if (downsampled_output)
1415 : {
1416 : /* Need to use raw-data interface to libjpeg */
1417 0 : sp->cinfo.d.raw_data_out = TRUE;
1418 : #if JPEG_LIB_VERSION >= 70
1419 0 : sp->cinfo.d.do_fancy_upsampling = FALSE;
1420 : #endif /* JPEG_LIB_VERSION >= 70 */
1421 0 : tif->tif_decoderow = DecodeRowError;
1422 0 : tif->tif_decodestrip = JPEGDecodeRaw;
1423 0 : tif->tif_decodetile = JPEGDecodeRaw;
1424 : }
1425 : else
1426 : {
1427 : /* Use normal interface to libjpeg */
1428 1907 : sp->cinfo.d.raw_data_out = FALSE;
1429 1907 : tif->tif_decoderow = JPEGDecode;
1430 1907 : tif->tif_decodestrip = JPEGDecode;
1431 1907 : tif->tif_decodetile = JPEGDecode;
1432 : }
1433 : /* Start JPEG decompressor */
1434 1907 : if (!TIFFjpeg_start_decompress(sp))
1435 2 : return (0);
1436 : /* Allocate downsampled-data buffers if needed */
1437 1905 : if (downsampled_output)
1438 : {
1439 0 : if (!alloc_downsampled_buffers(tif, sp->cinfo.d.comp_info,
1440 : sp->cinfo.d.num_components))
1441 0 : return (0);
1442 0 : sp->scancount = DCTSIZE; /* mark buffer empty */
1443 : }
1444 1905 : return (1);
1445 : }
1446 :
1447 : /*
1448 : * Decode a chunk of pixels.
1449 : * "Standard" case: returned data is not downsampled.
1450 : */
1451 : #if !defined(JPEG_LIB_MK1_OR_12BIT)
1452 11086 : static int JPEGDecode(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s)
1453 : {
1454 11086 : JPEGState *sp = JState(tif);
1455 : tmsize_t nrows;
1456 : (void)s;
1457 :
1458 : /*
1459 : ** Update available information, buffer may have been refilled
1460 : ** between decode requests
1461 : */
1462 11086 : sp->src.next_input_byte = (const JOCTET *)tif->tif_rawcp;
1463 11086 : sp->src.bytes_in_buffer = (size_t)tif->tif_rawcc;
1464 :
1465 11086 : if (sp->bytesperline == 0)
1466 : {
1467 0 : memset(buf, 0, (size_t)cc);
1468 0 : return 0;
1469 : }
1470 :
1471 11086 : nrows = cc / sp->bytesperline;
1472 11086 : if (cc % sp->bytesperline)
1473 0 : TIFFWarningExtR(tif, tif->tif_name, "fractional scanline not read");
1474 :
1475 11086 : if (nrows > (tmsize_t)sp->cinfo.d.image_height)
1476 : {
1477 : /* Initialize the output buffer if the JPEG image is smaller than the
1478 : * strile height. */
1479 0 : memset(buf, 0, (size_t)cc);
1480 0 : nrows = sp->cinfo.d.image_height;
1481 : }
1482 11086 : else if (sp->strile_width > sp->cinfo.d.image_width)
1483 : {
1484 : /* Initialize the output buffer if the JPEG image is smaller than the
1485 : * strile width. */
1486 0 : memset(buf, 0, (size_t)cc);
1487 : }
1488 :
1489 : /* data is expected to be read in multiples of a scanline */
1490 11086 : if (nrows)
1491 : {
1492 : do
1493 : {
1494 : /*
1495 : * In the libjpeg6b-9a 8bit case. We read directly into
1496 : * the TIFF buffer.
1497 : */
1498 114322 : JSAMPROW bufptr = (JSAMPROW)buf;
1499 :
1500 114322 : if (TIFFjpeg_read_scanlines(sp, &bufptr, 1) != 1)
1501 : {
1502 0 : memset(buf, 0, (size_t)cc);
1503 0 : return (0);
1504 : }
1505 :
1506 114322 : ++tif->tif_dir.td_row;
1507 114322 : buf += sp->bytesperline;
1508 114322 : cc -= sp->bytesperline;
1509 114322 : } while (--nrows > 0);
1510 : }
1511 :
1512 : /* Update information on consumed data */
1513 11086 : tif->tif_rawcp = (uint8_t *)sp->src.next_input_byte;
1514 11086 : tif->tif_rawcc = (tmsize_t)sp->src.bytes_in_buffer;
1515 :
1516 : /* Close down the decompressor if we've finished the strip or tile. */
1517 12855 : return sp->cinfo.d.output_scanline < sp->cinfo.d.output_height ||
1518 1769 : TIFFjpeg_finish_decompress(sp);
1519 : }
1520 : #endif /* !defined(JPEG_LIB_MK1_OR_12BIT) */
1521 :
1522 : #if defined(JPEG_LIB_MK1_OR_12BIT)
1523 9 : /*ARGSUSED*/ static int JPEGDecode(TIFF *tif, uint8_t *buf, tmsize_t cc,
1524 : uint16_t s)
1525 : {
1526 9 : JPEGState *sp = JState(tif);
1527 : tmsize_t nrows;
1528 : (void)s;
1529 :
1530 : /*
1531 : ** Update available information, buffer may have been refilled
1532 : ** between decode requests
1533 : */
1534 9 : sp->src.next_input_byte = (const JOCTET *)tif->tif_rawcp;
1535 9 : sp->src.bytes_in_buffer = (size_t)tif->tif_rawcc;
1536 :
1537 9 : if (sp->bytesperline == 0)
1538 : {
1539 0 : memset(buf, 0, (size_t)cc);
1540 0 : return 0;
1541 : }
1542 :
1543 9 : nrows = cc / sp->bytesperline;
1544 9 : if (cc % sp->bytesperline)
1545 0 : TIFFWarningExtR(tif, tif->tif_name, "fractional scanline not read");
1546 :
1547 9 : if (nrows > (tmsize_t)sp->cinfo.d.image_height)
1548 : {
1549 : /* Initialize the output buffer if the JPEG image is smaller than the
1550 : * strile height. */
1551 0 : memset(buf, 0, (size_t)cc);
1552 0 : nrows = sp->cinfo.d.image_height;
1553 : }
1554 9 : else if (sp->strile_width > sp->cinfo.d.image_width)
1555 : {
1556 : /* Initialize the output buffer if the JPEG image is smaller than the
1557 : * strile width. */
1558 0 : memset(buf, 0, (size_t)cc);
1559 : }
1560 :
1561 : /* data is expected to be read in multiples of a scanline */
1562 9 : if (nrows)
1563 : {
1564 9 : TIFF_JSAMPROW line_work_buf = NULL;
1565 :
1566 : /*
1567 : * For 6B, only use temporary buffer for 12 bit imagery.
1568 : * For Mk1 always use it.
1569 : */
1570 9 : if (sp->cinfo.d.data_precision == 12)
1571 : {
1572 9 : line_work_buf = (TIFF_JSAMPROW)_TIFFmallocExt(
1573 : tif, (tmsize_t)((size_t)sizeof(short) *
1574 9 : (size_t)sp->cinfo.d.output_width *
1575 9 : (size_t)sp->cinfo.d.num_components));
1576 : }
1577 :
1578 : do
1579 : {
1580 640 : if (line_work_buf != NULL)
1581 : {
1582 : /*
1583 : * In the MK1 case, we always read into a 16bit
1584 : * buffer, and then pack down to 12bit or 8bit.
1585 : * In 6B case we only read into 16 bit buffer
1586 : * for 12bit data, which we need to repack.
1587 : */
1588 640 : if (TIFFjpeg_read_scanlines(sp, &line_work_buf, 1) != 1)
1589 : {
1590 0 : memset(buf, 0, (size_t)cc);
1591 0 : _TIFFfreeExt(tif, line_work_buf);
1592 0 : return (0);
1593 : }
1594 :
1595 640 : if (sp->cinfo.d.data_precision == 12)
1596 : {
1597 640 : int value_pairs =
1598 640 : (int)((JDIMENSION)sp->cinfo.d.output_width *
1599 640 : (JDIMENSION)sp->cinfo.d.num_components) /
1600 : 2;
1601 : int iPair;
1602 :
1603 53888 : for (iPair = 0; iPair < value_pairs; iPair++)
1604 : {
1605 53248 : unsigned char *out_ptr =
1606 53248 : ((unsigned char *)buf) + iPair * 3;
1607 53248 : TIFF_JSAMPLE *in_ptr = line_work_buf + iPair * 2;
1608 :
1609 53248 : out_ptr[0] = (unsigned char)((in_ptr[0] & 0xff0) >> 4);
1610 53248 : out_ptr[1] =
1611 53248 : (unsigned char)(((in_ptr[0] & 0xf) << 4) |
1612 53248 : ((in_ptr[1] & 0xf00) >> 8));
1613 53248 : out_ptr[2] = (unsigned char)(((in_ptr[1] & 0xff) >> 0));
1614 : }
1615 : }
1616 0 : else if (sp->cinfo.d.data_precision == 8)
1617 : {
1618 0 : int value_count =
1619 0 : (int)((JDIMENSION)sp->cinfo.d.output_width *
1620 0 : (JDIMENSION)sp->cinfo.d.num_components);
1621 : int iValue;
1622 :
1623 0 : for (iValue = 0; iValue < value_count; iValue++)
1624 : {
1625 0 : ((unsigned char *)buf)[iValue] =
1626 0 : (unsigned char)(line_work_buf[iValue] & 0xff);
1627 : }
1628 : }
1629 : }
1630 :
1631 640 : ++tif->tif_dir.td_row;
1632 640 : buf += sp->bytesperline;
1633 640 : cc -= sp->bytesperline;
1634 640 : } while (--nrows > 0);
1635 :
1636 9 : if (line_work_buf != NULL)
1637 9 : _TIFFfreeExt(tif, line_work_buf);
1638 : }
1639 :
1640 : /* Update information on consumed data */
1641 9 : tif->tif_rawcp = (uint8_t *)sp->src.next_input_byte;
1642 9 : tif->tif_rawcc = (tmsize_t)sp->src.bytes_in_buffer;
1643 :
1644 : /* Close down the decompressor if we've finished the strip or tile. */
1645 18 : return sp->cinfo.d.output_scanline < sp->cinfo.d.output_height ||
1646 9 : TIFFjpeg_finish_decompress(sp);
1647 : }
1648 : #endif /* defined(JPEG_LIB_MK1_OR_12BIT) */
1649 :
1650 0 : /*ARGSUSED*/ static int DecodeRowError(TIFF *tif, uint8_t *buf, tmsize_t cc,
1651 : uint16_t s)
1652 :
1653 : {
1654 : (void)buf;
1655 : (void)cc;
1656 : (void)s;
1657 :
1658 0 : TIFFErrorExtR(
1659 : tif, "TIFFReadScanline",
1660 : "scanline oriented access is not supported for downsampled JPEG "
1661 : "compressed images, consider enabling TIFFTAG_JPEGCOLORMODE as "
1662 : "JPEGCOLORMODE_RGB.");
1663 0 : return 0;
1664 : }
1665 :
1666 : /*
1667 : * Decode a chunk of pixels.
1668 : * Returned data is downsampled per sampling factors.
1669 : */
1670 0 : /*ARGSUSED*/ static int JPEGDecodeRaw(TIFF *tif, uint8_t *buf, tmsize_t cc,
1671 : uint16_t s)
1672 : {
1673 0 : JPEGState *sp = JState(tif);
1674 : tmsize_t nrows;
1675 0 : TIFFDirectory *td = &tif->tif_dir;
1676 : (void)s;
1677 :
1678 0 : nrows = sp->cinfo.d.image_height;
1679 : /* For last strip, limit number of rows to its truncated height */
1680 : /* even if the codestream height is larger (which is not compliant, */
1681 : /* but that we tolerate) */
1682 0 : if ((uint32_t)nrows > td->td_imagelength - tif->tif_dir.td_row &&
1683 0 : !isTiled(tif))
1684 0 : nrows = td->td_imagelength - tif->tif_dir.td_row;
1685 :
1686 : #if defined(JPEG_LIB_MK1_OR_12BIT)
1687 0 : unsigned short *tmpbuf = NULL;
1688 : #endif
1689 :
1690 : /* data is expected to be read in multiples of a scanline */
1691 0 : if (nrows != 0)
1692 : {
1693 :
1694 : /* Cb,Cr both have sampling factors 1, so this is correct */
1695 0 : JDIMENSION clumps_per_line = sp->cinfo.d.comp_info[1].downsampled_width;
1696 0 : int samples_per_clump = sp->samplesperclump;
1697 :
1698 : #if defined(JPEG_LIB_MK1_OR_12BIT)
1699 0 : tmpbuf = (unsigned short *)_TIFFmallocExt(
1700 : tif, (tmsize_t)((size_t)sizeof(unsigned short) *
1701 0 : (size_t)sp->cinfo.d.output_width *
1702 0 : (size_t)sp->cinfo.d.num_components));
1703 0 : if (tmpbuf == NULL)
1704 : {
1705 0 : TIFFErrorExtR(tif, "JPEGDecodeRaw", "Out of memory");
1706 0 : return 0;
1707 : }
1708 : #endif
1709 :
1710 : do
1711 : {
1712 : jpeg_component_info *compptr;
1713 : int ci, clumpoffset;
1714 :
1715 0 : if (cc < sp->bytesperline)
1716 : {
1717 0 : TIFFErrorExtR(
1718 : tif, "JPEGDecodeRaw",
1719 : "application buffer not large enough for all data.");
1720 0 : goto error;
1721 : }
1722 :
1723 : /* Reload downsampled-data buffer if needed */
1724 0 : if (sp->scancount >= DCTSIZE)
1725 : {
1726 0 : int n = sp->cinfo.d.max_v_samp_factor * DCTSIZE;
1727 0 : if (TIFFjpeg_read_raw_data(sp, sp->ds_buffer, n) != n)
1728 0 : goto error;
1729 0 : sp->scancount = 0;
1730 : }
1731 : /*
1732 : * Fastest way to unseparate data is to make one pass
1733 : * over the scanline for each row of each component.
1734 : */
1735 0 : clumpoffset = 0; /* first sample in clump */
1736 0 : for (ci = 0, compptr = sp->cinfo.d.comp_info;
1737 0 : ci < sp->cinfo.d.num_components; ci++, compptr++)
1738 : {
1739 0 : int hsamp = compptr->h_samp_factor;
1740 0 : int vsamp = compptr->v_samp_factor;
1741 : int ypos;
1742 :
1743 0 : for (ypos = 0; ypos < vsamp; ypos++)
1744 : {
1745 0 : TIFF_JSAMPLE *inptr =
1746 0 : sp->ds_buffer[ci][sp->scancount * vsamp + ypos];
1747 : JDIMENSION nclump;
1748 : #if defined(JPEG_LIB_MK1_OR_12BIT)
1749 0 : TIFF_JSAMPLE *outptr = (TIFF_JSAMPLE *)tmpbuf + clumpoffset;
1750 : #else
1751 0 : TIFF_JSAMPLE *outptr = (TIFF_JSAMPLE *)buf + clumpoffset;
1752 0 : if (cc < (tmsize_t)(clumpoffset +
1753 0 : (tmsize_t)samples_per_clump *
1754 0 : (clumps_per_line - 1) +
1755 : hsamp))
1756 : {
1757 0 : TIFFErrorExtR(
1758 : tif, "JPEGDecodeRaw",
1759 : "application buffer not large enough for all data, "
1760 : "possible subsampling issue");
1761 0 : goto error;
1762 : }
1763 : #endif
1764 :
1765 0 : if (hsamp == 1)
1766 : {
1767 : /* fast path for at least Cb and Cr */
1768 0 : for (nclump = clumps_per_line; nclump-- > 0;)
1769 : {
1770 0 : outptr[0] = *inptr++;
1771 0 : outptr += samples_per_clump;
1772 : }
1773 : }
1774 : else
1775 : {
1776 : int xpos;
1777 :
1778 : /* general case */
1779 0 : for (nclump = clumps_per_line; nclump-- > 0;)
1780 : {
1781 0 : for (xpos = 0; xpos < hsamp; xpos++)
1782 0 : outptr[xpos] = *inptr++;
1783 0 : outptr += samples_per_clump;
1784 : }
1785 : }
1786 0 : clumpoffset += hsamp;
1787 : }
1788 : }
1789 :
1790 : #if defined(JPEG_LIB_MK1_OR_12BIT)
1791 : {
1792 0 : if (sp->cinfo.d.data_precision == 8)
1793 : {
1794 0 : int i = 0;
1795 0 : int len = (int)((JDIMENSION)sp->cinfo.d.output_width *
1796 0 : (JDIMENSION)sp->cinfo.d.num_components);
1797 0 : for (i = 0; i < len; i++)
1798 : {
1799 0 : ((unsigned char *)buf)[i] =
1800 0 : (unsigned char)(tmpbuf[i] & 0xff);
1801 : }
1802 : }
1803 : else
1804 : { /* 12-bit */
1805 0 : int value_pairs =
1806 0 : (int)((JDIMENSION)sp->cinfo.d.output_width *
1807 0 : (JDIMENSION)sp->cinfo.d.num_components) /
1808 : 2;
1809 : int iPair;
1810 0 : for (iPair = 0; iPair < value_pairs; iPair++)
1811 : {
1812 0 : unsigned char *out_ptr =
1813 0 : ((unsigned char *)buf) + iPair * 3;
1814 0 : TIFF_JSAMPLE *in_ptr =
1815 0 : (TIFF_JSAMPLE *)(tmpbuf + iPair * 2);
1816 0 : out_ptr[0] = (unsigned char)((in_ptr[0] & 0xff0) >> 4);
1817 0 : out_ptr[1] =
1818 0 : (unsigned char)(((in_ptr[0] & 0xf) << 4) |
1819 0 : ((in_ptr[1] & 0xf00) >> 8));
1820 0 : out_ptr[2] = (unsigned char)(((in_ptr[1] & 0xff) >> 0));
1821 : }
1822 : }
1823 : }
1824 : #endif
1825 :
1826 0 : sp->scancount++;
1827 0 : tif->tif_dir.td_row += sp->v_sampling;
1828 :
1829 0 : buf += sp->bytesperline;
1830 0 : cc -= sp->bytesperline;
1831 :
1832 0 : nrows -= sp->v_sampling;
1833 0 : } while (nrows > 0);
1834 :
1835 : #if defined(JPEG_LIB_MK1_OR_12BIT)
1836 0 : _TIFFfreeExt(tif, tmpbuf);
1837 : #endif
1838 : }
1839 :
1840 : /* Close down the decompressor if done. */
1841 0 : return sp->cinfo.d.output_scanline < sp->cinfo.d.output_height ||
1842 0 : TIFFjpeg_finish_decompress(sp);
1843 :
1844 0 : error:
1845 : #if defined(JPEG_LIB_MK1_OR_12BIT)
1846 0 : _TIFFfreeExt(tif, tmpbuf);
1847 : #endif
1848 0 : return 0;
1849 : }
1850 :
1851 : /*
1852 : * JPEG Encoding.
1853 : */
1854 :
1855 1737 : static void unsuppress_quant_table(JPEGState *sp, int tblno)
1856 : {
1857 : JQUANT_TBL *qtbl;
1858 :
1859 1737 : if ((qtbl = sp->cinfo.c.quant_tbl_ptrs[tblno]) != NULL)
1860 1737 : qtbl->sent_table = FALSE;
1861 1737 : }
1862 :
1863 8302 : static void suppress_quant_table(JPEGState *sp, int tblno)
1864 : {
1865 : JQUANT_TBL *qtbl;
1866 :
1867 8302 : if ((qtbl = sp->cinfo.c.quant_tbl_ptrs[tblno]) != NULL)
1868 8302 : qtbl->sent_table = TRUE;
1869 8302 : }
1870 :
1871 22 : static void unsuppress_huff_table(JPEGState *sp, int tblno)
1872 : {
1873 : JHUFF_TBL *htbl;
1874 :
1875 22 : if ((htbl = sp->cinfo.c.dc_huff_tbl_ptrs[tblno]) != NULL)
1876 22 : htbl->sent_table = FALSE;
1877 22 : if ((htbl = sp->cinfo.c.ac_huff_tbl_ptrs[tblno]) != NULL)
1878 22 : htbl->sent_table = FALSE;
1879 22 : }
1880 :
1881 1870 : static void suppress_huff_table(JPEGState *sp, int tblno)
1882 : {
1883 : JHUFF_TBL *htbl;
1884 :
1885 1870 : if ((htbl = sp->cinfo.c.dc_huff_tbl_ptrs[tblno]) != NULL)
1886 1870 : htbl->sent_table = TRUE;
1887 1870 : if ((htbl = sp->cinfo.c.ac_huff_tbl_ptrs[tblno]) != NULL)
1888 1870 : htbl->sent_table = TRUE;
1889 1870 : }
1890 :
1891 1179 : static int prepare_JPEGTables(TIFF *tif)
1892 : {
1893 1179 : JPEGState *sp = JState(tif);
1894 :
1895 : /* Initialize quant tables for current quality setting */
1896 1179 : if (!TIFFjpeg_set_quality(sp, sp->otherSettings.jpegquality, FALSE))
1897 0 : return (0);
1898 : /* Mark only the tables we want for output */
1899 : /* NB: chrominance tables are currently used only with YCbCr */
1900 1179 : if (!TIFFjpeg_suppress_tables(sp, TRUE))
1901 0 : return (0);
1902 1179 : if (sp->otherSettings.jpegtablesmode & JPEGTABLESMODE_QUANT)
1903 : {
1904 1175 : unsuppress_quant_table(sp, 0);
1905 1175 : if (sp->photometric == PHOTOMETRIC_YCBCR)
1906 440 : unsuppress_quant_table(sp, 1);
1907 : }
1908 1179 : if (sp->otherSettings.jpegtablesmode & JPEGTABLESMODE_HUFF)
1909 : {
1910 16 : unsuppress_huff_table(sp, 0);
1911 16 : if (sp->photometric == PHOTOMETRIC_YCBCR)
1912 6 : unsuppress_huff_table(sp, 1);
1913 : }
1914 : /* Direct libjpeg output into otherSettings.jpegtables */
1915 1179 : if (!TIFFjpeg_tables_dest(sp, tif))
1916 0 : return (0);
1917 : /* Emit tables-only datastream */
1918 1179 : if (!TIFFjpeg_write_tables(sp))
1919 0 : return (0);
1920 :
1921 1179 : return (1);
1922 : }
1923 :
1924 : #if defined(JPEG_LIB_VERSION_MAJOR) && \
1925 : (JPEG_LIB_VERSION_MAJOR > 9 || \
1926 : (JPEG_LIB_VERSION_MAJOR == 9 && JPEG_LIB_VERSION_MINOR >= 4))
1927 : /* This is a modified version of std_huff_tables() from jcparam.c
1928 : * in libjpeg-9d because it no longer initializes default Huffman
1929 : * tables in jpeg_set_defaults(). */
1930 : static void TIFF_std_huff_tables(j_compress_ptr cinfo)
1931 : {
1932 :
1933 : if (cinfo->dc_huff_tbl_ptrs[0] == NULL)
1934 : {
1935 : (void)jpeg_std_huff_table((j_common_ptr)cinfo, TRUE, 0);
1936 : }
1937 : if (cinfo->ac_huff_tbl_ptrs[0] == NULL)
1938 : {
1939 : (void)jpeg_std_huff_table((j_common_ptr)cinfo, FALSE, 0);
1940 : }
1941 : if (cinfo->dc_huff_tbl_ptrs[1] == NULL)
1942 : {
1943 : (void)jpeg_std_huff_table((j_common_ptr)cinfo, TRUE, 1);
1944 : }
1945 : if (cinfo->ac_huff_tbl_ptrs[1] == NULL)
1946 : {
1947 : (void)jpeg_std_huff_table((j_common_ptr)cinfo, FALSE, 1);
1948 : }
1949 : }
1950 : #endif
1951 :
1952 3383 : static int JPEGSetupEncode(TIFF *tif)
1953 : {
1954 3383 : JPEGState *sp = JState(tif);
1955 3383 : TIFFDirectory *td = &tif->tif_dir;
1956 : static const char module[] = "JPEGSetupEncode";
1957 :
1958 : #if defined(JPEG_DUAL_MODE_8_12) && !defined(FROM_TIF_JPEG_12)
1959 2203 : if (tif->tif_dir.td_bitspersample == 12)
1960 : {
1961 : /* We pass a pointer to a copy of otherSettings, since */
1962 : /* TIFFReInitJPEG_12() will clear sp */
1963 1180 : JPEGOtherSettings savedOtherSettings = sp->otherSettings;
1964 1180 : return TIFFReInitJPEG_12(tif, &savedOtherSettings, COMPRESSION_JPEG, 1);
1965 : }
1966 : #endif
1967 :
1968 2203 : JPEGInitializeLibJPEG(tif, FALSE);
1969 :
1970 2203 : assert(sp != NULL);
1971 2203 : assert(!sp->cinfo.comm.is_decompressor);
1972 :
1973 2203 : sp->photometric = td->td_photometric;
1974 :
1975 : /*
1976 : * Initialize all JPEG parameters to default values.
1977 : * Note that jpeg_set_defaults needs legal values for
1978 : * in_color_space and input_components.
1979 : */
1980 2203 : if (td->td_planarconfig == PLANARCONFIG_CONTIG)
1981 : {
1982 2192 : sp->cinfo.c.input_components = td->td_samplesperpixel;
1983 2192 : if (sp->photometric == PHOTOMETRIC_YCBCR)
1984 : {
1985 805 : if (sp->otherSettings.jpegcolormode == JPEGCOLORMODE_RGB)
1986 : {
1987 805 : sp->cinfo.c.in_color_space = JCS_RGB;
1988 : }
1989 : else
1990 : {
1991 0 : sp->cinfo.c.in_color_space = JCS_YCbCr;
1992 : }
1993 : }
1994 : else
1995 : {
1996 1387 : if ((td->td_photometric == PHOTOMETRIC_MINISWHITE ||
1997 1387 : td->td_photometric == PHOTOMETRIC_MINISBLACK) &&
1998 658 : td->td_samplesperpixel == 1)
1999 73 : sp->cinfo.c.in_color_space = JCS_GRAYSCALE;
2000 1314 : else if (td->td_photometric == PHOTOMETRIC_RGB &&
2001 723 : td->td_samplesperpixel == 3)
2002 88 : sp->cinfo.c.in_color_space = JCS_RGB;
2003 1226 : else if (td->td_photometric == PHOTOMETRIC_SEPARATED &&
2004 6 : td->td_samplesperpixel == 4)
2005 6 : sp->cinfo.c.in_color_space = JCS_CMYK;
2006 : else
2007 1220 : sp->cinfo.c.in_color_space = JCS_UNKNOWN;
2008 : }
2009 : }
2010 : else
2011 : {
2012 11 : sp->cinfo.c.input_components = 1;
2013 11 : sp->cinfo.c.in_color_space = JCS_UNKNOWN;
2014 : }
2015 2203 : if (!TIFFjpeg_set_defaults(sp))
2016 0 : return (0);
2017 :
2018 : /* mozjpeg by default enables progressive JPEG, which is illegal in
2019 : * JPEG-in-TIFF */
2020 : /* So explicitly disable it. */
2021 2203 : if (sp->cinfo.c.num_scans != 0 &&
2022 0 : (sp->otherSettings.jpegtablesmode & JPEGTABLESMODE_HUFF) != 0)
2023 : {
2024 : /* it has been found that mozjpeg could create corrupt strips/tiles */
2025 : /* in non optimize_coding mode. */
2026 0 : TIFFWarningExtR(
2027 : tif, module,
2028 : "mozjpeg library likely detected. Disable emission of "
2029 : "Huffman tables in JpegTables tag, and use optimize_coding "
2030 : "to avoid potential issues");
2031 0 : sp->otherSettings.jpegtablesmode &= ~JPEGTABLESMODE_HUFF;
2032 : }
2033 2203 : sp->cinfo.c.num_scans = 0;
2034 2203 : sp->cinfo.c.scan_info = NULL;
2035 :
2036 : /* Set per-file parameters */
2037 2203 : switch (sp->photometric)
2038 : {
2039 805 : case PHOTOMETRIC_YCBCR:
2040 805 : sp->h_sampling = td->td_ycbcrsubsampling[0];
2041 805 : sp->v_sampling = td->td_ycbcrsubsampling[1];
2042 805 : if (sp->h_sampling == 0 || sp->v_sampling == 0)
2043 : {
2044 0 : TIFFErrorExtR(tif, module,
2045 : "Invalig horizontal/vertical sampling value");
2046 0 : return (0);
2047 : }
2048 805 : if (td->td_bitspersample > 16)
2049 : {
2050 0 : TIFFErrorExtR(tif, module,
2051 : "BitsPerSample %" PRIu16 " not allowed for JPEG",
2052 0 : td->td_bitspersample);
2053 0 : return (0);
2054 : }
2055 :
2056 : /*
2057 : * A ReferenceBlackWhite field *must* be present since the
2058 : * default value is inappropriate for YCbCr. Fill in the
2059 : * proper value if application didn't set it.
2060 : */
2061 : {
2062 : float *ref;
2063 805 : if (!TIFFGetField(tif, TIFFTAG_REFERENCEBLACKWHITE, &ref))
2064 : {
2065 : float refbw[6];
2066 441 : uint32_t top = 1U << td->td_bitspersample;
2067 441 : refbw[0] = 0;
2068 441 : refbw[1] = (float)(top - 1);
2069 441 : refbw[2] = (float)(top >> 1);
2070 441 : refbw[3] = refbw[1];
2071 441 : refbw[4] = refbw[2];
2072 441 : refbw[5] = refbw[1];
2073 441 : TIFFSetField(tif, TIFFTAG_REFERENCEBLACKWHITE, refbw);
2074 : }
2075 : }
2076 805 : break;
2077 0 : case PHOTOMETRIC_PALETTE: /* disallowed by Tech Note */
2078 : case PHOTOMETRIC_MASK:
2079 0 : TIFFErrorExtR(tif, module,
2080 : "PhotometricInterpretation %" PRIu16
2081 : " not allowed for JPEG",
2082 0 : sp->photometric);
2083 0 : return (0);
2084 1398 : default:
2085 : /* TIFF 6.0 forbids subsampling of all other color spaces */
2086 1398 : sp->h_sampling = 1;
2087 1398 : sp->v_sampling = 1;
2088 1398 : break;
2089 : }
2090 :
2091 : /* Verify miscellaneous parameters */
2092 :
2093 : /*
2094 : * This would need work if libtiff ever supports different
2095 : * depths for different components, or if libjpeg ever supports
2096 : * run-time selection of depth. Neither is imminent.
2097 : */
2098 : #ifdef JPEG_LIB_MK1
2099 : /* BITS_IN_JSAMPLE now permits 8 and 12 --- dgilbert */
2100 : if (td->td_bitspersample != 8 && td->td_bitspersample != 12)
2101 : #else
2102 2203 : if (td->td_bitspersample != BITS_IN_JSAMPLE)
2103 : #endif
2104 : {
2105 0 : TIFFErrorExtR(tif, module,
2106 : "BitsPerSample %" PRIu16 " not allowed for JPEG",
2107 0 : td->td_bitspersample);
2108 0 : return (0);
2109 : }
2110 2203 : sp->cinfo.c.data_precision = td->td_bitspersample;
2111 : #ifdef JPEG_LIB_MK1
2112 : sp->cinfo.c.bits_in_jsample = td->td_bitspersample;
2113 : #endif
2114 2203 : if (isTiled(tif))
2115 : {
2116 63 : if ((td->td_tilelength % ((uint32_t)sp->v_sampling * DCTSIZE)) != 0)
2117 : {
2118 0 : TIFFErrorExtR(tif, module,
2119 : "JPEG tile height must be multiple of %" PRIu32,
2120 0 : (uint32_t)sp->v_sampling * DCTSIZE);
2121 0 : return (0);
2122 : }
2123 63 : if ((td->td_tilewidth % ((uint32_t)sp->h_sampling * DCTSIZE)) != 0)
2124 : {
2125 0 : TIFFErrorExtR(tif, module,
2126 : "JPEG tile width must be multiple of %" PRIu32,
2127 0 : (uint32_t)sp->h_sampling * DCTSIZE);
2128 0 : return (0);
2129 : }
2130 : }
2131 : else
2132 : {
2133 2140 : if (td->td_rowsperstrip < td->td_imagelength &&
2134 30 : (td->td_rowsperstrip % ((uint32_t)sp->v_sampling * DCTSIZE)) != 0)
2135 : {
2136 0 : TIFFErrorExtR(tif, module,
2137 : "RowsPerStrip must be multiple of %" PRIu32
2138 : " for JPEG",
2139 0 : (uint32_t)sp->v_sampling * DCTSIZE);
2140 0 : return (0);
2141 : }
2142 : }
2143 :
2144 : /* Create a JPEGTables field if appropriate */
2145 2203 : if (sp->otherSettings.jpegtablesmode &
2146 : (JPEGTABLESMODE_QUANT | JPEGTABLESMODE_HUFF))
2147 : {
2148 2196 : if (sp->otherSettings.jpegtables == NULL ||
2149 1130 : memcmp(sp->otherSettings.jpegtables, "\0\0\0\0\0\0\0\0\0", 8) == 0)
2150 : {
2151 : #if defined(JPEG_LIB_VERSION_MAJOR) && \
2152 : (JPEG_LIB_VERSION_MAJOR > 9 || \
2153 : (JPEG_LIB_VERSION_MAJOR == 9 && JPEG_LIB_VERSION_MINOR >= 4))
2154 : if ((sp->otherSettings.jpegtablesmode & JPEGTABLESMODE_HUFF) != 0 &&
2155 : (sp->cinfo.c.dc_huff_tbl_ptrs[0] == NULL ||
2156 : sp->cinfo.c.dc_huff_tbl_ptrs[1] == NULL ||
2157 : sp->cinfo.c.ac_huff_tbl_ptrs[0] == NULL ||
2158 : sp->cinfo.c.ac_huff_tbl_ptrs[1] == NULL))
2159 : {
2160 : /* libjpeg-9d no longer initializes default Huffman tables in */
2161 : /* jpeg_set_defaults() */
2162 : TIFF_std_huff_tables(&sp->cinfo.c);
2163 : }
2164 : #endif
2165 :
2166 1179 : if (!prepare_JPEGTables(tif))
2167 0 : return (0);
2168 : /* Mark the field present */
2169 : /* Can't use TIFFSetField since BEENWRITING is already set! */
2170 1179 : tif->tif_flags |= TIFF_DIRTYDIRECT;
2171 1179 : TIFFSetFieldBit(tif, FIELD_JPEGTABLES);
2172 : }
2173 : }
2174 : else
2175 : {
2176 : /* We do not support application-supplied JPEGTables, */
2177 : /* so mark the field not present */
2178 7 : TIFFClrFieldBit(tif, FIELD_JPEGTABLES);
2179 : }
2180 :
2181 : /* Direct libjpeg output to libtiff's output buffer */
2182 2203 : TIFFjpeg_data_dest(sp, tif);
2183 :
2184 2203 : return (1);
2185 : }
2186 :
2187 : /*
2188 : * Set encoding state at the start of a strip or tile.
2189 : */
2190 4212 : static int JPEGPreEncode(TIFF *tif, uint16_t s)
2191 : {
2192 4212 : JPEGState *sp = JState(tif);
2193 4212 : TIFFDirectory *td = &tif->tif_dir;
2194 : static const char module[] = "JPEGPreEncode";
2195 : int downsampled_input;
2196 :
2197 4212 : assert(sp != NULL);
2198 :
2199 4212 : if (sp->cinfo.comm.is_decompressor == 1)
2200 : {
2201 2 : tif->tif_setupencode(tif);
2202 : }
2203 :
2204 4212 : assert(!sp->cinfo.comm.is_decompressor);
2205 :
2206 4212 : if (!JPEGComputeStrileWidthHeightBytesPerLine(tif, s))
2207 0 : return 0;
2208 :
2209 4212 : if (sp->strile_width > (uint32_t)JPEG_MAX_DIMENSION ||
2210 4212 : sp->strile_height > (uint32_t)JPEG_MAX_DIMENSION)
2211 : {
2212 0 : TIFFErrorExtR(tif, module,
2213 : "Strip/tile too large for JPEG. Maximum dimension is %d",
2214 : (int)JPEG_MAX_DIMENSION);
2215 0 : return (0);
2216 : }
2217 4212 : sp->cinfo.c.image_width = sp->strile_width;
2218 4212 : sp->cinfo.c.image_height = sp->strile_height;
2219 4212 : downsampled_input = FALSE;
2220 4212 : if (td->td_planarconfig == PLANARCONFIG_CONTIG)
2221 : {
2222 3876 : sp->cinfo.c.input_components = td->td_samplesperpixel;
2223 3876 : if (sp->photometric == PHOTOMETRIC_YCBCR)
2224 : {
2225 1994 : if (sp->otherSettings.jpegcolormode != JPEGCOLORMODE_RGB)
2226 : {
2227 0 : if (sp->h_sampling != 1 || sp->v_sampling != 1)
2228 0 : downsampled_input = TRUE;
2229 : }
2230 1994 : if (!TIFFjpeg_set_colorspace(sp, JCS_YCbCr))
2231 0 : return (0);
2232 : /*
2233 : * Set Y sampling factors;
2234 : * we assume jpeg_set_colorspace() set the rest to 1
2235 : */
2236 1994 : sp->cinfo.c.comp_info[0].h_samp_factor = sp->h_sampling;
2237 1994 : sp->cinfo.c.comp_info[0].v_samp_factor = sp->v_sampling;
2238 : }
2239 : else
2240 : {
2241 1882 : if (!TIFFjpeg_set_colorspace(sp, sp->cinfo.c.in_color_space))
2242 0 : return (0);
2243 : /* jpeg_set_colorspace set all sampling factors to 1 */
2244 : }
2245 : }
2246 : else
2247 : {
2248 336 : if (!TIFFjpeg_set_colorspace(sp, JCS_UNKNOWN))
2249 0 : return (0);
2250 336 : sp->cinfo.c.comp_info[0].component_id = s;
2251 : /* jpeg_set_colorspace() set sampling factors to 1 */
2252 336 : if (sp->photometric == PHOTOMETRIC_YCBCR && s > 0)
2253 : {
2254 0 : sp->cinfo.c.comp_info[0].quant_tbl_no = 1;
2255 0 : sp->cinfo.c.comp_info[0].dc_tbl_no = 1;
2256 0 : sp->cinfo.c.comp_info[0].ac_tbl_no = 1;
2257 : }
2258 : }
2259 : /* ensure libjpeg won't write any extraneous markers */
2260 4212 : sp->cinfo.c.write_JFIF_header = FALSE;
2261 4212 : sp->cinfo.c.write_Adobe_marker = FALSE;
2262 : /* set up table handling correctly */
2263 : /* calling TIFFjpeg_set_quality() causes quantization tables to be flagged
2264 : */
2265 : /* as being to be emitted, which we don't want in the JPEGTABLESMODE_QUANT
2266 : */
2267 : /* mode, so we must manually suppress them. However TIFFjpeg_set_quality()
2268 : */
2269 : /* should really be called when dealing with files with directories with */
2270 : /* mixed qualities. see http://trac.osgeo.org/gdal/ticket/3539 */
2271 4212 : if (!TIFFjpeg_set_quality(sp, sp->otherSettings.jpegquality, FALSE))
2272 0 : return (0);
2273 4212 : if (sp->otherSettings.jpegtablesmode & JPEGTABLESMODE_QUANT)
2274 : {
2275 4151 : suppress_quant_table(sp, 0);
2276 4151 : suppress_quant_table(sp, 1);
2277 : }
2278 : else
2279 : {
2280 61 : unsuppress_quant_table(sp, 0);
2281 61 : unsuppress_quant_table(sp, 1);
2282 : }
2283 4212 : if (sp->otherSettings.jpegtablesmode & JPEGTABLESMODE_HUFF)
2284 : {
2285 : /* Explicit suppression is only needed if we did not go through the */
2286 : /* prepare_JPEGTables() code path, which may be the case if updating */
2287 : /* an existing file */
2288 935 : suppress_huff_table(sp, 0);
2289 935 : suppress_huff_table(sp, 1);
2290 :
2291 : /* We want to keep optimize_coding = TRUE for 12-bit JPEG */
2292 : /* See lengthy explanation at
2293 : * https://gitlab.com/libtiff/libtiff/-/work_items/773#note_3009836854
2294 : */
2295 935 : if (sp->cinfo.c.data_precision == 8)
2296 349 : sp->cinfo.c.optimize_coding = FALSE;
2297 : }
2298 : else
2299 3277 : sp->cinfo.c.optimize_coding = TRUE;
2300 4212 : if (downsampled_input)
2301 : {
2302 : /* Need to use raw-data interface to libjpeg */
2303 0 : sp->cinfo.c.raw_data_in = TRUE;
2304 0 : tif->tif_encoderow = JPEGEncodeRaw;
2305 0 : tif->tif_encodestrip = JPEGEncodeRaw;
2306 0 : tif->tif_encodetile = JPEGEncodeRaw;
2307 : }
2308 : else
2309 : {
2310 : /* Use normal interface to libjpeg */
2311 4212 : sp->cinfo.c.raw_data_in = FALSE;
2312 4212 : tif->tif_encoderow = JPEGEncode;
2313 4212 : tif->tif_encodestrip = JPEGEncode;
2314 4212 : tif->tif_encodetile = JPEGEncode;
2315 : }
2316 : /* Start JPEG compressor */
2317 4212 : if (!TIFFjpeg_start_compress(sp, FALSE))
2318 0 : return (0);
2319 : /* Allocate downsampled-data buffers if needed */
2320 4212 : if (downsampled_input)
2321 : {
2322 0 : if (!alloc_downsampled_buffers(tif, sp->cinfo.c.comp_info,
2323 : sp->cinfo.c.num_components))
2324 0 : return (0);
2325 : }
2326 4212 : sp->scancount = 0;
2327 4212 : sp->encode_raw_error = FALSE;
2328 :
2329 4212 : return (1);
2330 : }
2331 :
2332 : /*
2333 : * Encode a chunk of pixels.
2334 : * "Standard" case: incoming data is not downsampled.
2335 : */
2336 8259 : static int JPEGEncode(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s)
2337 : {
2338 8259 : JPEGState *sp = JState(tif);
2339 : tmsize_t nrows;
2340 : TIFF_JSAMPROW bufptr[1];
2341 8259 : short *line16 = NULL;
2342 8259 : int line16_count = 0;
2343 :
2344 : (void)s;
2345 8259 : assert(sp != NULL);
2346 : /* data is expected to be supplied in multiples of a scanline */
2347 8259 : nrows = cc / sp->bytesperline;
2348 8259 : if (cc % sp->bytesperline)
2349 0 : TIFFWarningExtR(tif, tif->tif_name, "fractional scanline discarded");
2350 :
2351 : /* The last strip will be limited to image size */
2352 8259 : if (!isTiled(tif) &&
2353 7743 : tif->tif_dir.td_row + nrows > tif->tif_dir.td_imagelength)
2354 0 : nrows = tif->tif_dir.td_imagelength - tif->tif_dir.td_row;
2355 :
2356 8259 : if (sp->cinfo.c.data_precision == 12)
2357 : {
2358 1181 : line16_count = (int)((sp->bytesperline * 2) / 3);
2359 1181 : line16 = (short *)_TIFFmallocExt(
2360 1181 : tif, (tmsize_t)(sizeof(short) * (size_t)line16_count));
2361 1181 : if (!line16)
2362 : {
2363 0 : TIFFErrorExtR(tif, "JPEGEncode", "Failed to allocate memory");
2364 :
2365 0 : return 0;
2366 : }
2367 : }
2368 :
2369 186538 : while (nrows-- > 0)
2370 : {
2371 :
2372 178279 : if (sp->cinfo.c.data_precision == 12)
2373 : {
2374 :
2375 19200 : int value_pairs = line16_count / 2;
2376 : int iPair;
2377 :
2378 19200 : bufptr[0] = (TIFF_JSAMPROW)line16;
2379 :
2380 495872 : for (iPair = 0; iPair < value_pairs; iPair++)
2381 : {
2382 476672 : unsigned char *in_ptr = ((unsigned char *)buf) + iPair * 3;
2383 476672 : TIFF_JSAMPLE *out_ptr = (TIFF_JSAMPLE *)(line16 + iPair * 2);
2384 :
2385 476672 : out_ptr[0] = (TIFF_JSAMPLE)((in_ptr[0] << 4) |
2386 476672 : ((in_ptr[1] & 0xf0) >> 4));
2387 476672 : out_ptr[1] =
2388 476672 : (TIFF_JSAMPLE)(((in_ptr[1] & 0x0f) << 8) | in_ptr[2]);
2389 : }
2390 : }
2391 : else
2392 : {
2393 159079 : bufptr[0] = (TIFF_JSAMPROW)buf;
2394 : }
2395 178279 : if (TIFFjpeg_write_scanlines(sp, bufptr, 1) != 1)
2396 0 : return (0);
2397 178279 : if (nrows > 0)
2398 170020 : tif->tif_dir.td_row++;
2399 178279 : buf += sp->bytesperline;
2400 : }
2401 :
2402 8259 : if (sp->cinfo.c.data_precision == 12)
2403 : {
2404 1181 : _TIFFfreeExt(tif, line16);
2405 : }
2406 :
2407 8259 : return (1);
2408 : }
2409 :
2410 : /*
2411 : * Encode a chunk of pixels.
2412 : * Incoming data is expected to be downsampled per sampling factors.
2413 : */
2414 0 : static int JPEGEncodeRaw(TIFF *tif, uint8_t *buf, tmsize_t cc, uint16_t s)
2415 : {
2416 0 : JPEGState *sp = JState(tif);
2417 : TIFF_JSAMPLE *inptr;
2418 : TIFF_JSAMPLE *outptr;
2419 : tmsize_t nrows;
2420 : JDIMENSION clumps_per_line, nclump;
2421 : int clumpoffset, ci, xpos, ypos;
2422 : jpeg_component_info *compptr;
2423 0 : int samples_per_clump = sp->samplesperclump;
2424 : tmsize_t bytesperclumpline;
2425 :
2426 : (void)s;
2427 0 : assert(sp != NULL);
2428 :
2429 0 : if (sp->encode_raw_error)
2430 : {
2431 0 : TIFFErrorExtR(tif, tif->tif_name, "JPEGEncodeRaw() already failed");
2432 0 : return 0;
2433 : }
2434 :
2435 : /* data is expected to be supplied in multiples of a clumpline */
2436 : /* a clumpline is equivalent to v_sampling desubsampled scanlines */
2437 : /* TODO: the following calculation of bytesperclumpline, should substitute
2438 : * calculation of sp->bytesperline, except that it is per v_sampling lines
2439 : */
2440 0 : bytesperclumpline =
2441 0 : ((((tmsize_t)sp->cinfo.c.image_width + sp->h_sampling - 1) /
2442 0 : sp->h_sampling) *
2443 0 : ((tmsize_t)sp->h_sampling * sp->v_sampling + 2) *
2444 0 : sp->cinfo.c.data_precision +
2445 : 7) /
2446 : 8;
2447 :
2448 0 : nrows = (cc / bytesperclumpline) * sp->v_sampling;
2449 0 : if (cc % bytesperclumpline)
2450 0 : TIFFWarningExtR(tif, tif->tif_name, "fractional scanline discarded");
2451 :
2452 : /* Cb,Cr both have sampling factors 1, so this is correct */
2453 0 : clumps_per_line = sp->cinfo.c.comp_info[1].downsampled_width;
2454 :
2455 0 : while (nrows > 0)
2456 : {
2457 : /*
2458 : * Fastest way to separate the data is to make one pass
2459 : * over the scanline for each row of each component.
2460 : */
2461 0 : clumpoffset = 0; /* first sample in clump */
2462 0 : for (ci = 0, compptr = sp->cinfo.c.comp_info;
2463 0 : ci < sp->cinfo.c.num_components; ci++, compptr++)
2464 : {
2465 0 : int hsamp = compptr->h_samp_factor;
2466 0 : int vsamp = compptr->v_samp_factor;
2467 0 : int padding =
2468 0 : (int)(compptr->width_in_blocks * DCTSIZE -
2469 0 : (JDIMENSION)clumps_per_line * (JDIMENSION)hsamp);
2470 0 : for (ypos = 0; ypos < vsamp; ypos++)
2471 : {
2472 0 : inptr = ((TIFF_JSAMPLE *)buf) + clumpoffset;
2473 0 : outptr = sp->ds_buffer[ci][sp->scancount * vsamp + ypos];
2474 0 : if (hsamp == 1)
2475 : {
2476 : /* fast path for at least Cb and Cr */
2477 0 : for (nclump = clumps_per_line; nclump-- > 0;)
2478 : {
2479 0 : *outptr++ = inptr[0];
2480 0 : inptr += samples_per_clump;
2481 : }
2482 : }
2483 : else
2484 : {
2485 : /* general case */
2486 0 : for (nclump = clumps_per_line; nclump-- > 0;)
2487 : {
2488 0 : for (xpos = 0; xpos < hsamp; xpos++)
2489 0 : *outptr++ = inptr[xpos];
2490 0 : inptr += samples_per_clump;
2491 : }
2492 : }
2493 : /* pad each scanline as needed */
2494 0 : for (xpos = 0; xpos < padding; xpos++)
2495 : {
2496 0 : *outptr = outptr[-1];
2497 0 : outptr++;
2498 : }
2499 0 : clumpoffset += hsamp;
2500 : }
2501 : }
2502 0 : sp->scancount++;
2503 0 : if (sp->scancount >= DCTSIZE)
2504 : {
2505 0 : int n = sp->cinfo.c.max_v_samp_factor * DCTSIZE;
2506 0 : if (TIFFjpeg_write_raw_data(sp, sp->ds_buffer, n) != n)
2507 : {
2508 0 : sp->encode_raw_error = TRUE;
2509 0 : return (0);
2510 : }
2511 0 : sp->scancount = 0;
2512 : }
2513 0 : tif->tif_dir.td_row += sp->v_sampling;
2514 0 : buf += bytesperclumpline;
2515 0 : nrows -= sp->v_sampling;
2516 : }
2517 0 : return (1);
2518 : }
2519 :
2520 : /*
2521 : * Finish up at the end of a strip or tile.
2522 : */
2523 4212 : static int JPEGPostEncode(TIFF *tif)
2524 : {
2525 4212 : JPEGState *sp = JState(tif);
2526 :
2527 4212 : if (sp->scancount > 0)
2528 : {
2529 : /*
2530 : * Need to emit a partial bufferload of downsampled data.
2531 : * Pad the data vertically.
2532 : */
2533 : int ci, ypos, n;
2534 : jpeg_component_info *compptr;
2535 :
2536 0 : for (ci = 0, compptr = sp->cinfo.c.comp_info;
2537 0 : ci < sp->cinfo.c.num_components; ci++, compptr++)
2538 : {
2539 0 : int vsamp = compptr->v_samp_factor;
2540 0 : tmsize_t row_width =
2541 0 : compptr->width_in_blocks * DCTSIZE * sizeof(JSAMPLE);
2542 0 : for (ypos = sp->scancount * vsamp; ypos < DCTSIZE * vsamp; ypos++)
2543 : {
2544 0 : _TIFFmemcpy((void *)sp->ds_buffer[ci][ypos],
2545 0 : (void *)sp->ds_buffer[ci][ypos - 1], row_width);
2546 : }
2547 : }
2548 0 : n = sp->cinfo.c.max_v_samp_factor * DCTSIZE;
2549 0 : if (TIFFjpeg_write_raw_data(sp, sp->ds_buffer, n) != n)
2550 0 : return (0);
2551 : }
2552 :
2553 4212 : return (TIFFjpeg_finish_compress(JState(tif)));
2554 : }
2555 :
2556 5356 : static void JPEGCleanup(TIFF *tif)
2557 : {
2558 5356 : JPEGState *sp = JState(tif);
2559 :
2560 5356 : assert(sp != 0);
2561 :
2562 5356 : tif->tif_tagmethods.vgetfield = sp->otherSettings.vgetparent;
2563 5356 : tif->tif_tagmethods.vsetfield = sp->otherSettings.vsetparent;
2564 5356 : tif->tif_tagmethods.printdir = sp->otherSettings.printdir;
2565 5356 : if (sp->cinfo_initialized)
2566 2380 : TIFFjpeg_destroy(sp); /* release libjpeg resources */
2567 5356 : if (sp->otherSettings.jpegtables) /* tag value */
2568 5325 : _TIFFfreeExt(tif, sp->otherSettings.jpegtables);
2569 5356 : _TIFFfreeExt(tif, tif->tif_data); /* release local state */
2570 5356 : tif->tif_data = NULL;
2571 :
2572 5356 : _TIFFSetDefaultCompressionState(tif);
2573 5356 : }
2574 :
2575 4547 : static void JPEGResetUpsampled(TIFF *tif)
2576 : {
2577 4547 : JPEGState *sp = JState(tif);
2578 4547 : TIFFDirectory *td = &tif->tif_dir;
2579 :
2580 : /*
2581 : * Mark whether returned data is up-sampled or not so TIFFStripSize
2582 : * and TIFFTileSize return values that reflect the true amount of
2583 : * data.
2584 : */
2585 4547 : tif->tif_flags &= ~TIFF_UPSAMPLED;
2586 4547 : if (td->td_planarconfig == PLANARCONFIG_CONTIG)
2587 : {
2588 4486 : if (td->td_photometric == PHOTOMETRIC_YCBCR &&
2589 2729 : sp->otherSettings.jpegcolormode == JPEGCOLORMODE_RGB)
2590 : {
2591 1226 : tif->tif_flags |= TIFF_UPSAMPLED;
2592 : }
2593 : else
2594 : {
2595 : #ifdef notdef
2596 : if (td->td_ycbcrsubsampling[0] != 1 ||
2597 : td->td_ycbcrsubsampling[1] != 1)
2598 : ; /* XXX what about up-sampling? */
2599 : #endif
2600 : }
2601 : }
2602 :
2603 : /*
2604 : * Must recalculate cached tile size in case sampling state changed.
2605 : * Should we really be doing this now if image size isn't set?
2606 : */
2607 4547 : if (tif->tif_dir.td_tilesize > 0)
2608 260 : tif->tif_dir.td_tilesize =
2609 260 : isTiled(tif) ? TIFFTileSize(tif) : (tmsize_t)(-1);
2610 4547 : if (tif->tif_dir.td_scanlinesize > 0)
2611 1119 : tif->tif_dir.td_scanlinesize = TIFFScanlineSize(tif);
2612 4547 : }
2613 :
2614 43663 : static int JPEGVSetField(TIFF *tif, uint32_t tag, va_list ap)
2615 : {
2616 43663 : JPEGState *sp = JState(tif);
2617 : const TIFFField *fip;
2618 : uint32_t v32;
2619 :
2620 43663 : assert(sp != NULL);
2621 :
2622 43663 : switch (tag)
2623 : {
2624 3084 : case TIFFTAG_JPEGTABLES:
2625 3084 : v32 = (uint32_t)va_arg(ap, uint32_t);
2626 3084 : if (v32 == 0)
2627 : {
2628 : /* XXX */
2629 0 : return (0);
2630 : }
2631 3084 : _TIFFsetByteArrayExt(tif, &sp->otherSettings.jpegtables,
2632 3084 : va_arg(ap, void *), v32);
2633 3084 : sp->otherSettings.jpegtables_length = v32;
2634 3084 : TIFFSetFieldBit(tif, FIELD_JPEGTABLES);
2635 3084 : break;
2636 3218 : case TIFFTAG_JPEGQUALITY:
2637 3218 : sp->otherSettings.jpegquality = (int)va_arg(ap, int);
2638 3218 : return (1); /* pseudo tag */
2639 1273 : case TIFFTAG_JPEGCOLORMODE:
2640 1273 : sp->otherSettings.jpegcolormode = (int)va_arg(ap, int);
2641 1273 : JPEGResetUpsampled(tif);
2642 1273 : return (1); /* pseudo tag */
2643 3274 : case TIFFTAG_PHOTOMETRIC:
2644 : {
2645 3274 : int ret_value = (*sp->otherSettings.vsetparent)(tif, tag, ap);
2646 3274 : JPEGResetUpsampled(tif);
2647 3274 : return ret_value;
2648 : }
2649 3702 : case TIFFTAG_JPEGTABLESMODE:
2650 3702 : sp->otherSettings.jpegtablesmode = (int)va_arg(ap, int);
2651 3702 : return (1); /* pseudo tag */
2652 1378 : case TIFFTAG_YCBCRSUBSAMPLING:
2653 : /* mark the fact that we have a real ycbcrsubsampling! */
2654 1378 : sp->otherSettings.ycbcrsampling_fetched = 1;
2655 : /* should we be recomputing upsampling info here? */
2656 1378 : return (*sp->otherSettings.vsetparent)(tif, tag, ap);
2657 27734 : default:
2658 27734 : return (*sp->otherSettings.vsetparent)(tif, tag, ap);
2659 : }
2660 :
2661 3084 : if ((fip = TIFFFieldWithTag(tif, tag)) != NULL)
2662 : {
2663 3084 : TIFFSetFieldBit(tif, fip->field_bit);
2664 : }
2665 : else
2666 : {
2667 0 : return (0);
2668 : }
2669 :
2670 3084 : tif->tif_flags |= TIFF_DIRTYDIRECT;
2671 3084 : return (1);
2672 : }
2673 :
2674 33690 : static int JPEGVGetField(TIFF *tif, uint32_t tag, va_list ap)
2675 : {
2676 33690 : JPEGState *sp = JState(tif);
2677 :
2678 33690 : assert(sp != NULL);
2679 :
2680 33690 : switch (tag)
2681 : {
2682 6982 : case TIFFTAG_JPEGTABLES:
2683 6982 : *va_arg(ap, uint32_t *) = sp->otherSettings.jpegtables_length;
2684 6982 : *va_arg(ap, const void **) = sp->otherSettings.jpegtables;
2685 6982 : break;
2686 0 : case TIFFTAG_JPEGQUALITY:
2687 0 : *va_arg(ap, int *) = sp->otherSettings.jpegquality;
2688 0 : break;
2689 551 : case TIFFTAG_JPEGCOLORMODE:
2690 551 : *va_arg(ap, int *) = sp->otherSettings.jpegcolormode;
2691 551 : break;
2692 1069 : case TIFFTAG_JPEGTABLESMODE:
2693 1069 : *va_arg(ap, int *) = sp->otherSettings.jpegtablesmode;
2694 1069 : break;
2695 25088 : default:
2696 25088 : return (*sp->otherSettings.vgetparent)(tif, tag, ap);
2697 : }
2698 8602 : return (1);
2699 : }
2700 :
2701 0 : static void JPEGPrintDir(TIFF *tif, FILE *fd, long flags)
2702 : {
2703 0 : JPEGState *sp = JState(tif);
2704 :
2705 0 : assert(sp != NULL);
2706 : (void)flags;
2707 :
2708 0 : if (sp != NULL)
2709 : {
2710 0 : if (TIFFFieldSet(tif, FIELD_JPEGTABLES))
2711 0 : fprintf(fd, " JPEG Tables: (%" PRIu32 " bytes)\n",
2712 : sp->otherSettings.jpegtables_length);
2713 0 : if (sp->otherSettings.printdir)
2714 0 : (*sp->otherSettings.printdir)(tif, fd, flags);
2715 : }
2716 0 : }
2717 :
2718 55 : static uint32_t JPEGDefaultStripSize(TIFF *tif, uint32_t s)
2719 : {
2720 55 : JPEGState *sp = JState(tif);
2721 55 : TIFFDirectory *td = &tif->tif_dir;
2722 :
2723 55 : s = (*sp->otherSettings.defsparent)(tif, s);
2724 55 : if (s < td->td_imagelength)
2725 36 : s = TIFFroundup_32(s, td->td_ycbcrsubsampling[1] * DCTSIZE);
2726 55 : return (s);
2727 : }
2728 :
2729 0 : static void JPEGDefaultTileSize(TIFF *tif, uint32_t *tw, uint32_t *th)
2730 : {
2731 0 : JPEGState *sp = JState(tif);
2732 0 : TIFFDirectory *td = &tif->tif_dir;
2733 :
2734 0 : (*sp->otherSettings.deftparent)(tif, tw, th);
2735 0 : *tw = TIFFroundup_32(*tw, td->td_ycbcrsubsampling[0] * DCTSIZE);
2736 0 : *th = TIFFroundup_32(*th, td->td_ycbcrsubsampling[1] * DCTSIZE);
2737 0 : }
2738 :
2739 : /*
2740 : * The JPEG library initialized used to be done in TIFFInitJPEG(), but
2741 : * now that we allow a TIFF file to be opened in update mode it is necessary
2742 : * to have some way of deciding whether compression or decompression is
2743 : * desired other than looking at tif->tif_mode. We accomplish this by
2744 : * examining {TILE/STRIP}BYTECOUNTS to see if there is a non-zero entry.
2745 : * If so, we assume decompression is desired.
2746 : *
2747 : * This is tricky, because TIFFInitJPEG() is called while the directory is
2748 : * being read, and generally speaking the BYTECOUNTS tag won't have been read
2749 : * at that point. So we try to defer jpeg library initialization till we
2750 : * do have that tag ... basically any access that might require the compressor
2751 : * or decompressor that occurs after the reading of the directory.
2752 : *
2753 : * In an ideal world compressors or decompressors would be setup
2754 : * at the point where a single tile or strip was accessed (for read or write)
2755 : * so that stuff like update of missing tiles, or replacement of tiles could
2756 : * be done. However, we aren't trying to crack that nut just yet ...
2757 : *
2758 : * NFW, Feb 3rd, 2003.
2759 : */
2760 :
2761 2396 : static int JPEGInitializeLibJPEG(TIFF *tif, int decompress)
2762 : {
2763 2396 : JPEGState *sp = JState(tif);
2764 :
2765 2396 : if (sp->cinfo_initialized)
2766 : {
2767 16 : if (!decompress && sp->cinfo.comm.is_decompressor)
2768 2 : TIFFjpeg_destroy(sp);
2769 14 : else if (decompress && !sp->cinfo.comm.is_decompressor)
2770 14 : TIFFjpeg_destroy(sp);
2771 : else
2772 0 : return 1;
2773 :
2774 16 : sp->cinfo_initialized = 0;
2775 : }
2776 :
2777 : /*
2778 : * Initialize libjpeg.
2779 : */
2780 2396 : if (decompress)
2781 : {
2782 193 : if (!TIFFjpeg_create_decompress(sp))
2783 0 : return (0);
2784 : }
2785 : else
2786 : {
2787 2203 : if (!TIFFjpeg_create_compress(sp))
2788 0 : return (0);
2789 : #ifndef TIFF_JPEG_MAX_MEMORY_TO_USE
2790 : #define TIFF_JPEG_MAX_MEMORY_TO_USE (10 * 1024 * 1024)
2791 : #endif
2792 : /* libjpeg turbo 1.5.2 honours max_memory_to_use, but has no backing */
2793 : /* store implementation, so better not set max_memory_to_use ourselves.
2794 : */
2795 : /* See https://github.com/libjpeg-turbo/libjpeg-turbo/issues/162 */
2796 2203 : if (sp->cinfo.c.mem->max_memory_to_use > 0)
2797 : {
2798 : /* This is to address bug related in ticket GDAL #1795. */
2799 30 : if (getenv("JPEGMEM") == NULL)
2800 : {
2801 : /* Increase the max memory usable. This helps when creating
2802 : * files */
2803 : /* with "big" tile, without using libjpeg temporary files. */
2804 : /* For example a 512x512 tile with 3 bands */
2805 : /* requires 1.5 MB which is above libjpeg 1MB default */
2806 0 : if (sp->cinfo.c.mem->max_memory_to_use <
2807 : TIFF_JPEG_MAX_MEMORY_TO_USE)
2808 0 : sp->cinfo.c.mem->max_memory_to_use =
2809 : TIFF_JPEG_MAX_MEMORY_TO_USE;
2810 : }
2811 : }
2812 : }
2813 :
2814 2396 : sp->cinfo_initialized = TRUE;
2815 :
2816 2396 : return 1;
2817 : }
2818 :
2819 0 : static uint64_t JPEGGetMaxCompressionRatio(TIFF *tif)
2820 : {
2821 : /* See README_for_libtiff_developpers.md for raw data used to estimate
2822 : * the maximum compression rate. */
2823 :
2824 0 : const JPEGState *sp = JState(tif);
2825 0 : if ((tif->tif_dir.td_photometric == PHOTOMETRIC_YCBCR) &&
2826 0 : (tif->tif_dir.td_planarconfig == PLANARCONFIG_CONTIG) &&
2827 0 : (tif->tif_dir.td_samplesperpixel == 3))
2828 : {
2829 0 : if (sp->h_sampling == 2 && sp->v_sampling == 2)
2830 : {
2831 0 : if (tif->tif_dir.td_bitspersample == 12)
2832 0 : return 768;
2833 : else
2834 0 : return 512;
2835 : }
2836 :
2837 0 : return 0; /* unknown */
2838 : }
2839 :
2840 0 : if (tif->tif_dir.td_bitspersample == 12)
2841 0 : return 384;
2842 : else
2843 0 : return 256;
2844 : }
2845 :
2846 : /* Common to tif_jpeg.c and tif_jpeg_12.c */
2847 6544 : static void TIFFInitJPEGCommon(TIFF *tif)
2848 : {
2849 : JPEGState *sp;
2850 :
2851 6544 : sp = JState(tif);
2852 6544 : sp->tif = tif; /* back link */
2853 :
2854 : /* Default values for codec-specific fields */
2855 6544 : sp->otherSettings.jpegtables = NULL;
2856 6544 : sp->otherSettings.jpegtables_length = 0;
2857 6544 : sp->otherSettings.jpegquality = 75; /* Default IJG quality */
2858 6544 : sp->otherSettings.jpegcolormode = JPEGCOLORMODE_RAW;
2859 6544 : sp->otherSettings.jpegtablesmode =
2860 : JPEGTABLESMODE_QUANT | JPEGTABLESMODE_HUFF;
2861 6544 : sp->otherSettings.ycbcrsampling_fetched = 0;
2862 :
2863 6544 : tif->tif_tagmethods.vgetfield = JPEGVGetField; /* hook for codec tags */
2864 6544 : tif->tif_tagmethods.vsetfield = JPEGVSetField; /* hook for codec tags */
2865 6544 : tif->tif_tagmethods.printdir = JPEGPrintDir; /* hook for codec tags */
2866 :
2867 : /*
2868 : * Install codec methods.
2869 : */
2870 6544 : tif->tif_fixuptags = JPEGFixupTags;
2871 6544 : tif->tif_setupdecode = JPEGSetupDecode;
2872 6544 : tif->tif_predecode = JPEGPreDecode;
2873 6544 : tif->tif_decoderow = JPEGDecode;
2874 6544 : tif->tif_decodestrip = JPEGDecode;
2875 6544 : tif->tif_decodetile = JPEGDecode;
2876 6544 : tif->tif_setupencode = JPEGSetupEncode;
2877 6544 : tif->tif_preencode = JPEGPreEncode;
2878 6544 : tif->tif_postencode = JPEGPostEncode;
2879 6544 : tif->tif_encoderow = JPEGEncode;
2880 6544 : tif->tif_encodestrip = JPEGEncode;
2881 6544 : tif->tif_encodetile = JPEGEncode;
2882 6544 : tif->tif_getmaxcompressionratio = JPEGGetMaxCompressionRatio;
2883 6544 : tif->tif_cleanup = JPEGCleanup;
2884 :
2885 6544 : tif->tif_defstripsize = JPEGDefaultStripSize;
2886 6544 : tif->tif_deftilesize = JPEGDefaultTileSize;
2887 6544 : tif->tif_flags |= TIFF_NOBITREV; /* no bit reversal, please */
2888 6544 : sp->cinfo_initialized = FALSE;
2889 6544 : }
2890 :
2891 5356 : int TIFFInitJPEG(TIFF *tif, int scheme)
2892 : {
2893 : JPEGState *sp;
2894 :
2895 : (void)scheme;
2896 5356 : assert(scheme == COMPRESSION_JPEG);
2897 :
2898 : /*
2899 : * Merge codec-specific tag information.
2900 : */
2901 5356 : if (!_TIFFMergeFields(tif, jpegFields, TIFFArrayCount(jpegFields)))
2902 : {
2903 0 : TIFFErrorExtR(tif, "TIFFInitJPEG",
2904 : "Merging JPEG codec-specific tags failed");
2905 0 : return 0;
2906 : }
2907 :
2908 : /*
2909 : * Allocate state block so tag methods have storage to record values.
2910 : */
2911 5356 : tif->tif_data = (uint8_t *)_TIFFmallocExt(tif, sizeof(JPEGState));
2912 :
2913 5356 : if (tif->tif_data == NULL)
2914 : {
2915 0 : TIFFErrorExtR(tif, "TIFFInitJPEG", "No space for JPEG state block");
2916 0 : return 0;
2917 : }
2918 5356 : _TIFFmemset(tif->tif_data, 0, sizeof(JPEGState));
2919 :
2920 5356 : sp = JState(tif);
2921 : /*
2922 : * Override parent get/set field methods.
2923 : */
2924 5356 : sp->otherSettings.vgetparent = tif->tif_tagmethods.vgetfield;
2925 5356 : sp->otherSettings.vsetparent = tif->tif_tagmethods.vsetfield;
2926 5356 : sp->otherSettings.printdir = tif->tif_tagmethods.printdir;
2927 :
2928 5356 : sp->otherSettings.defsparent = tif->tif_defstripsize;
2929 5356 : sp->otherSettings.deftparent = tif->tif_deftilesize;
2930 :
2931 5356 : TIFFInitJPEGCommon(tif);
2932 :
2933 : /*
2934 : ** Create a JPEGTables field if no directory has yet been created.
2935 : ** We do this just to ensure that sufficient space is reserved for
2936 : ** the JPEGTables field. It will be properly created the right
2937 : ** size later.
2938 : */
2939 5356 : if (tif->tif_diroff == 0)
2940 : {
2941 : #define SIZE_OF_JPEGTABLES 2000
2942 : /*
2943 : The following line assumes incorrectly that all JPEG-in-TIFF files will
2944 : have a JPEGTABLES tag generated and causes null-filled JPEGTABLES tags
2945 : to be written when the JPEG data is placed with TIFFWriteRawStrip. The
2946 : field bit should be set, anyway, later when actual JPEGTABLES header is
2947 : generated, so removing it here hopefully is harmless.
2948 : TIFFSetFieldBit(tif, FIELD_JPEGTABLES);
2949 : */
2950 2267 : sp->otherSettings.jpegtables_length = SIZE_OF_JPEGTABLES;
2951 2267 : sp->otherSettings.jpegtables =
2952 2267 : (void *)_TIFFmallocExt(tif, sp->otherSettings.jpegtables_length);
2953 2267 : if (sp->otherSettings.jpegtables)
2954 : {
2955 2267 : _TIFFmemset(sp->otherSettings.jpegtables, 0, SIZE_OF_JPEGTABLES);
2956 : }
2957 : else
2958 : {
2959 0 : TIFFErrorExtR(tif, "TIFFInitJPEG",
2960 : "Failed to allocate memory for JPEG tables");
2961 0 : return 0;
2962 : }
2963 : #undef SIZE_OF_JPEGTABLES
2964 : }
2965 5356 : return 1;
2966 : }
2967 : #endif /* JPEG_SUPPORT */
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