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[wxWidgets.git] / src / tiff / libtiff / tif_ojpeg.c
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8414a40c
VZ		 1/* $Id$ */
2
80ed523f
VZ		 3/* WARNING: The type of JPEG encapsulation defined by the TIFF Version 6.0
4 specification is now totally obsolete and deprecated for new applications and
5 images. This file was was created solely in order to read unconverted images
6 still present on some users' computer systems. It will never be extended
7 to write such files. Writing new-style JPEG compressed TIFFs is implemented
8 in tif_jpeg.c.
9
10 The code is carefully crafted to robustly read all gathered JPEG-in-TIFF
11 testfiles, and anticipate as much as possible all other... But still, it may
12 fail on some. If you encounter problems, please report them on the TIFF
13 mailing list and/or to Joris Van Damme <info@awaresystems.be>.
14
15 Please read the file called "TIFF Technical Note #2" if you need to be
16 convinced this compression scheme is bad and breaks TIFF. That document
17 is linked to from the LibTiff site <http://www.remotesensing.org/libtiff/>
18 and from AWare Systems' TIFF section
19 <http://www.awaresystems.be/imaging/tiff.html>. It is also absorbed
20 in Adobe's specification supplements, marked "draft" up to this day, but
21 supported by the TIFF community.
22
23 This file interfaces with Release 6B of the JPEG Library written by the
24 Independent JPEG Group. Previous versions of this file required a hack inside
25 the LibJpeg library. This version no longer requires that. Remember to
26 remove the hack if you update from the old version.
27
28 Copyright (c) Joris Van Damme <info@awaresystems.be>
29 Copyright (c) AWare Systems <http://www.awaresystems.be/>
30
31 The licence agreement for this file is the same as the rest of the LibTiff
32 library.
33
34 IN NO EVENT SHALL JORIS VAN DAMME OR AWARE SYSTEMS BE LIABLE FOR
35 ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
36 OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
37 WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
38 LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
39 OF THIS SOFTWARE.
40
41 Joris Van Damme and/or AWare Systems may be available for custom
42 developement. If you like what you see, and need anything similar or related,
43 contact <info@awaresystems.be>.
44*/
45
46/* What is what, and what is not?
47
48 This decoder starts with an input stream, that is essentially the JpegInterchangeFormat
49 stream, if any, followed by the strile data, if any. This stream is read in
50 OJPEGReadByte and related functions.
51
52 It analyzes the start of this stream, until it encounters non-marker data, i.e.
53 compressed image data. Some of the header markers it sees have no actual content,
54 like the SOI marker, and APP/COM markers that really shouldn't even be there. Some
55 other markers do have content, and the valuable bits and pieces of information
56 in these markers are saved, checking all to verify that the stream is more or
57 less within expected bounds. This happens inside the OJPEGReadHeaderInfoSecStreamXxx
58 functions.
59
60 Some OJPEG imagery contains no valid JPEG header markers. This situation is picked
61 up on if we've seen no SOF marker when we're at the start of the compressed image
62 data. In this case, the tables are read from JpegXxxTables tags, and the other
63 bits and pieces of information is initialized to its most basic value. This is
64 implemented in the OJPEGReadHeaderInfoSecTablesXxx functions.
65
66 When this is complete, a good and valid JPEG header can be assembled, and this is
67 passed through to LibJpeg. When that's done, the remainder of the input stream, i.e.
68 the compressed image data, can be passed through unchanged. This is done in
69 OJPEGWriteStream functions.
70
71 LibTiff rightly expects to know the subsampling values before decompression. Just like
72 in new-style JPEG-in-TIFF, though, or even more so, actually, the YCbCrsubsampling
73 tag is notoriously unreliable. To correct these tag values with the ones inside
74 the JPEG stream, the first part of the input stream is pre-scanned in
75 OJPEGSubsamplingCorrect, making no note of any other data, reporting no warnings
76 or errors, up to the point where either these values are read, or it's clear they
77 aren't there. This means that some of the data is read twice, but we feel speed
78 in correcting these values is important enough to warrant this sacrifice. Allthough
79 there is currently no define or other configuration mechanism to disable this behaviour,
80 the actual header scanning is build to robustly respond with error report if it
81 should encounter an uncorrected mismatch of subsampling values. See
82 OJPEGReadHeaderInfoSecStreamSof.
83
84 The restart interval and restart markers are the most tricky part... The restart
85 interval can be specified in a tag. It can also be set inside the input JPEG stream.
86 It can be used inside the input JPEG stream. If reading from strile data, we've
87 consistenly discovered the need to insert restart markers in between the different
88 striles, as is also probably the most likely interpretation of the original TIFF 6.0
89 specification. With all this setting of interval, and actual use of markers that is not
90 predictable at the time of valid JPEG header assembly, the restart thing may turn
91 out the Achilles heel of this implementation. Fortunately, most OJPEG writer vendors
92 succeed in reading back what they write, which may be the reason why we've been able
93 to discover ways that seem to work.
94
95 Some special provision is made for planarconfig separate OJPEG files. These seem
96 to consistently contain header info, a SOS marker, a plane, SOS marker, plane, SOS,
97 and plane. This may or may not be a valid JPEG configuration, we don't know and don't
98 care. We want LibTiff to be able to access the planes individually, without huge
99 buffering inside LibJpeg, anyway. So we compose headers to feed to LibJpeg, in this
100 case, that allow us to pass a single plane such that LibJpeg sees a valid
101 single-channel JPEG stream. Locating subsequent SOS markers, and thus subsequent
102 planes, is done inside OJPEGReadSecondarySos.
103
104 The benefit of the scheme is... that it works, basically. We know of no other that
105 does. It works without checking software tag, or otherwise going about things in an
106 OJPEG flavor specific manner. Instead, it is a single scheme, that covers the cases
107 with and without JpegInterchangeFormat, with and without striles, with part of
108 the header in JpegInterchangeFormat and remainder in first strile, etc. It is forgiving
109 and robust, may likely work with OJPEG flavors we've not seen yet, and makes most out
110 of the data.
111
112 Another nice side-effect is that a complete JPEG single valid stream is build if
113 planarconfig is not separate (vast majority). We may one day use that to build
114 converters to JPEG, and/or to new-style JPEG compression inside TIFF.
115
116 A dissadvantage is the lack of random access to the individual striles. This is the
117 reason for much of the complicated restart-and-position stuff inside OJPEGPreDecode.
118 Applications would do well accessing all striles in order, as this will result in
119 a single sequential scan of the input stream, and no restarting of LibJpeg decoding
120 session.
121*/
122
123#define WIN32_LEAN_AND_MEAN
124#define VC_EXTRALEAN
125
8414a40c
VZ		 126#include "tiffiop.h"
127#ifdef OJPEG_SUPPORT
128
80ed523f
VZ		 129/* Configuration defines here are:
130 * JPEG_ENCAP_EXTERNAL: The normal way to call libjpeg, uses longjump. In some environments,
131 * like eg LibTiffDelphi, this is not possible. For this reason, the actual calls to
132 * libjpeg, with longjump stuff, are encapsulated in dedicated functions. When
133 * JPEG_ENCAP_EXTERNAL is defined, these encapsulating functions are declared external
134 * to this unit, and can be defined elsewhere to use stuff other then longjump.
135 * The default mode, without JPEG_ENCAP_EXTERNAL, implements the call encapsulators
136 * here, internally, with normal longjump.
137 * SETJMP, LONGJMP, JMP_BUF: On some machines/environments a longjump equivalent is
138 * conviniently available, but still it may be worthwhile to use _setjmp or sigsetjmp
139 * in place of plain setjmp. These macros will make it easier. It is useless
140 * to fiddle with these if you define JPEG_ENCAP_EXTERNAL.
141 * OJPEG_BUFFER: Define the size of the desired buffer here. Should be small enough so as to guarantee
142 * instant processing, optimal streaming and optimal use of processor cache, but also big
143 * enough so as to not result in significant call overhead. It should be at least a few
144 * bytes to accomodate some structures (this is verified in asserts), but it would not be
145 * sensible to make it this small anyway, and it should be at most 64K since it is indexed
146 * with uint16. We recommend 2K.
147 * EGYPTIANWALK: You could also define EGYPTIANWALK here, but it is not used anywhere and has
148 * absolutely no effect. That is why most people insist the EGYPTIANWALK is a bit silly.
149 */
150
151/* define LIBJPEG_ENCAP_EXTERNAL */
152#define SETJMP(jbuf) setjmp(jbuf)
153#define LONGJMP(jbuf,code) longjmp(jbuf,code)
154#define JMP_BUF jmp_buf
155#define OJPEG_BUFFER 2048
156/* define EGYPTIANWALK */
157
158#define JPEG_MARKER_SOF0 0xC0
159#define JPEG_MARKER_SOF1 0xC1
160#define JPEG_MARKER_SOF3 0xC3
161#define JPEG_MARKER_DHT 0xC4
162#define JPEG_MARKER_RST0 0XD0
163#define JPEG_MARKER_SOI 0xD8
164#define JPEG_MARKER_EOI 0xD9
165#define JPEG_MARKER_SOS 0xDA
166#define JPEG_MARKER_DQT 0xDB
167#define JPEG_MARKER_DRI 0xDD
168#define JPEG_MARKER_APP0 0xE0
169#define JPEG_MARKER_COM 0xFE
170
171#define FIELD_OJPEG_JPEGINTERCHANGEFORMAT (FIELD_CODEC+0)
172#define FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH (FIELD_CODEC+1)
173#define FIELD_OJPEG_JPEGQTABLES (FIELD_CODEC+2)
174#define FIELD_OJPEG_JPEGDCTABLES (FIELD_CODEC+3)
175#define FIELD_OJPEG_JPEGACTABLES (FIELD_CODEC+4)
176#define FIELD_OJPEG_JPEGPROC (FIELD_CODEC+5)
177#define FIELD_OJPEG_JPEGRESTARTINTERVAL (FIELD_CODEC+6)
178
179static const TIFFField ojpegFields[] = {
180 {TIFFTAG_JPEGIFOFFSET,1,1,TIFF_LONG8,0,TIFF_SETGET_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGINTERCHANGEFORMAT,TRUE,FALSE,"JpegInterchangeFormat",NULL},
181 {TIFFTAG_JPEGIFBYTECOUNT,1,1,TIFF_LONG8,0,TIFF_SETGET_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH,TRUE,FALSE,"JpegInterchangeFormatLength",NULL},
182 {TIFFTAG_JPEGQTABLES,TIFF_VARIABLE2,TIFF_VARIABLE2,TIFF_LONG8,0,TIFF_SETGET_C32_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGQTABLES,FALSE,TRUE,"JpegQTables",NULL},
183 {TIFFTAG_JPEGDCTABLES,TIFF_VARIABLE2,TIFF_VARIABLE2,TIFF_LONG8,0,TIFF_SETGET_C32_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGDCTABLES,FALSE,TRUE,"JpegDcTables",NULL},
184 {TIFFTAG_JPEGACTABLES,TIFF_VARIABLE2,TIFF_VARIABLE2,TIFF_LONG8,0,TIFF_SETGET_C32_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGACTABLES,FALSE,TRUE,"JpegAcTables",NULL},
185 {TIFFTAG_JPEGPROC,1,1,TIFF_SHORT,0,TIFF_SETGET_UINT16,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGPROC,FALSE,FALSE,"JpegProc",NULL},
186 {TIFFTAG_JPEGRESTARTINTERVAL,1,1,TIFF_SHORT,0,TIFF_SETGET_UINT16,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGRESTARTINTERVAL,FALSE,FALSE,"JpegRestartInterval",NULL},
187};
188
189#ifndef LIBJPEG_ENCAP_EXTERNAL
8414a40c 190#include <setjmp.h>
80ed523f
VZ		 191#endif
192
193/* We undefine FAR to avoid conflict with JPEG definition */
194
8414a40c 195#ifdef FAR
80ed523f 196#undef FAR
8414a40c 197#endif
80ed523f
VZ		 198
199/*
200 Libjpeg's jmorecfg.h defines INT16 and INT32, but only if XMD_H is
201 not defined. Unfortunately, the MinGW and Borland compilers include
202 a typedef for INT32, which causes a conflict. MSVC does not include
203 a conficting typedef given the headers which are included.
204*/
205#if defined(__BORLANDC__) || defined(__MINGW32__)
206# define XMD_H 1
207#endif
208
209/* Define "boolean" as unsigned char, not int, per Windows custom. */
210#if defined(__WIN32__) && !defined(__MINGW32__)
211# ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */
212 typedef unsigned char boolean;
213# endif
214# define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */
215#endif
216
8414a40c 217#include "jpeglib.h"
80ed523f 218#include "jerror.h"
8414a40c 219
80ed523f
VZ		 220typedef struct jpeg_error_mgr jpeg_error_mgr;
221typedef struct jpeg_common_struct jpeg_common_struct;
222typedef struct jpeg_decompress_struct jpeg_decompress_struct;
223typedef struct jpeg_source_mgr jpeg_source_mgr;
8414a40c 224
80ed523f
VZ		 225typedef enum {
226 osibsNotSetYet,
227 osibsJpegInterchangeFormat,
228 osibsStrile,
229 osibsEof
230} OJPEGStateInBufferSource;
231
232typedef enum {
233 ososSoi,
234 ososQTable0,ososQTable1,ososQTable2,ososQTable3,
235 ososDcTable0,ososDcTable1,ososDcTable2,ososDcTable3,
236 ososAcTable0,ososAcTable1,ososAcTable2,ososAcTable3,
237 ososDri,
238 ososSof,
239 ososSos,
240 ososCompressed,
241 ososRst,
242 ososEoi
243} OJPEGStateOutState;
244
245typedef struct {
246 TIFF* tif;
247 #ifndef LIBJPEG_ENCAP_EXTERNAL
248 JMP_BUF exit_jmpbuf;
249 #endif
250 TIFFVGetMethod vgetparent;
251 TIFFVSetMethod vsetparent;
252 TIFFPrintMethod printdir;
253 uint64 file_size;
254 uint32 image_width;
255 uint32 image_length;
256 uint32 strile_width;
257 uint32 strile_length;
258 uint32 strile_length_total;
259 uint8 samples_per_pixel;
260 uint8 plane_sample_offset;
261 uint8 samples_per_pixel_per_plane;
262 uint64 jpeg_interchange_format;
263 uint64 jpeg_interchange_format_length;
264 uint8 jpeg_proc;
265 uint8 subsamplingcorrect;
266 uint8 subsamplingcorrect_done;
267 uint8 subsampling_tag;
268 uint8 subsampling_hor;
269 uint8 subsampling_ver;
270 uint8 subsampling_force_desubsampling_inside_decompression;
271 uint8 qtable_offset_count;
272 uint8 dctable_offset_count;
273 uint8 actable_offset_count;
274 uint64 qtable_offset[3];
275 uint64 dctable_offset[3];
276 uint64 actable_offset[3];
277 uint8* qtable[4];
278 uint8* dctable[4];
279 uint8* actable[4];
280 uint16 restart_interval;
281 uint8 restart_index;
282 uint8 sof_log;
283 uint8 sof_marker_id;
284 uint32 sof_x;
285 uint32 sof_y;
286 uint8 sof_c[3];
287 uint8 sof_hv[3];
288 uint8 sof_tq[3];
289 uint8 sos_cs[3];
290 uint8 sos_tda[3];
291 struct {
292 uint8 log;
293 OJPEGStateInBufferSource in_buffer_source;
294 uint32 in_buffer_next_strile;
295 uint64 in_buffer_file_pos;
296 uint64 in_buffer_file_togo;
297 } sos_end[3];
298 uint8 readheader_done;
299 uint8 writeheader_done;
300 uint16 write_cursample;
301 uint32 write_curstrile;
302 uint8 libjpeg_session_active;
303 uint8 libjpeg_jpeg_query_style;
304 jpeg_error_mgr libjpeg_jpeg_error_mgr;
305 jpeg_decompress_struct libjpeg_jpeg_decompress_struct;
306 jpeg_source_mgr libjpeg_jpeg_source_mgr;
307 uint8 subsampling_convert_log;
308 uint32 subsampling_convert_ylinelen;
309 uint32 subsampling_convert_ylines;
310 uint32 subsampling_convert_clinelen;
311 uint32 subsampling_convert_clines;
312 uint32 subsampling_convert_ybuflen;
313 uint32 subsampling_convert_cbuflen;
314 uint32 subsampling_convert_ycbcrbuflen;
315 uint8* subsampling_convert_ycbcrbuf;
316 uint8* subsampling_convert_ybuf;
317 uint8* subsampling_convert_cbbuf;
318 uint8* subsampling_convert_crbuf;
319 uint32 subsampling_convert_ycbcrimagelen;
320 uint8** subsampling_convert_ycbcrimage;
321 uint32 subsampling_convert_clinelenout;
322 uint32 subsampling_convert_state;
323 uint32 bytes_per_line; /* if the codec outputs subsampled data, a 'line' in bytes_per_line */
324 uint32 lines_per_strile; /* and lines_per_strile means subsampling_ver desubsampled rows */
325 OJPEGStateInBufferSource in_buffer_source;
326 uint32 in_buffer_next_strile;
327 uint32 in_buffer_strile_count;
328 uint64 in_buffer_file_pos;
329 uint8 in_buffer_file_pos_log;
330 uint64 in_buffer_file_togo;
331 uint16 in_buffer_togo;
332 uint8* in_buffer_cur;
333 uint8 in_buffer[OJPEG_BUFFER];
334 OJPEGStateOutState out_state;
335 uint8 out_buffer[OJPEG_BUFFER];
336 uint8* skip_buffer;
337} OJPEGState;
338
339static int OJPEGVGetField(TIFF* tif, uint32 tag, va_list ap);
340static int OJPEGVSetField(TIFF* tif, uint32 tag, va_list ap);
341static void OJPEGPrintDir(TIFF* tif, FILE* fd, long flags);
342
343static int OJPEGFixupTags(TIFF* tif);
344static int OJPEGSetupDecode(TIFF* tif);
345static int OJPEGPreDecode(TIFF* tif, uint16 s);
346static int OJPEGPreDecodeSkipRaw(TIFF* tif);
347static int OJPEGPreDecodeSkipScanlines(TIFF* tif);
348static int OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s);
349static int OJPEGDecodeRaw(TIFF* tif, uint8* buf, tmsize_t cc);
350static int OJPEGDecodeScanlines(TIFF* tif, uint8* buf, tmsize_t cc);
351static void OJPEGPostDecode(TIFF* tif, uint8* buf, tmsize_t cc);
352static int OJPEGSetupEncode(TIFF* tif);
353static int OJPEGPreEncode(TIFF* tif, uint16 s);
354static int OJPEGEncode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s);
355static int OJPEGPostEncode(TIFF* tif);
356static void OJPEGCleanup(TIFF* tif);
357
358static void OJPEGSubsamplingCorrect(TIFF* tif);
359static int OJPEGReadHeaderInfo(TIFF* tif);
360static int OJPEGReadSecondarySos(TIFF* tif, uint16 s);
361static int OJPEGWriteHeaderInfo(TIFF* tif);
362static void OJPEGLibjpegSessionAbort(TIFF* tif);
363
364static int OJPEGReadHeaderInfoSec(TIFF* tif);
365static int OJPEGReadHeaderInfoSecStreamDri(TIFF* tif);
366static int OJPEGReadHeaderInfoSecStreamDqt(TIFF* tif);
367static int OJPEGReadHeaderInfoSecStreamDht(TIFF* tif);
368static int OJPEGReadHeaderInfoSecStreamSof(TIFF* tif, uint8 marker_id);
369static int OJPEGReadHeaderInfoSecStreamSos(TIFF* tif);
370static int OJPEGReadHeaderInfoSecTablesQTable(TIFF* tif);
371static int OJPEGReadHeaderInfoSecTablesDcTable(TIFF* tif);
372static int OJPEGReadHeaderInfoSecTablesAcTable(TIFF* tif);
373
374static int OJPEGReadBufferFill(OJPEGState* sp);
375static int OJPEGReadByte(OJPEGState* sp, uint8* byte);
376static int OJPEGReadBytePeek(OJPEGState* sp, uint8* byte);
377static void OJPEGReadByteAdvance(OJPEGState* sp);
378static int OJPEGReadWord(OJPEGState* sp, uint16* word);
379static int OJPEGReadBlock(OJPEGState* sp, uint16 len, void* mem);
380static void OJPEGReadSkip(OJPEGState* sp, uint16 len);
381
382static int OJPEGWriteStream(TIFF* tif, void** mem, uint32* len);
383static void OJPEGWriteStreamSoi(TIFF* tif, void** mem, uint32* len);
384static void OJPEGWriteStreamQTable(TIFF* tif, uint8 table_index, void** mem, uint32* len);
385static void OJPEGWriteStreamDcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len);
386static void OJPEGWriteStreamAcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len);
387static void OJPEGWriteStreamDri(TIFF* tif, void** mem, uint32* len);
388static void OJPEGWriteStreamSof(TIFF* tif, void** mem, uint32* len);
389static void OJPEGWriteStreamSos(TIFF* tif, void** mem, uint32* len);
390static int OJPEGWriteStreamCompressed(TIFF* tif, void** mem, uint32* len);
391static void OJPEGWriteStreamRst(TIFF* tif, void** mem, uint32* len);
392static void OJPEGWriteStreamEoi(TIFF* tif, void** mem, uint32* len);
393
394#ifdef LIBJPEG_ENCAP_EXTERNAL
395extern int jpeg_create_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo);
396extern int jpeg_read_header_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, uint8 require_image);
397extern int jpeg_start_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo);
398extern int jpeg_read_scanlines_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* scanlines, uint32 max_lines);
399extern int jpeg_read_raw_data_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* data, uint32 max_lines);
400extern void jpeg_encap_unwind(TIFF* tif);
401#else
402static int jpeg_create_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* j);
403static int jpeg_read_header_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, uint8 require_image);
404static int jpeg_start_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo);
405static int jpeg_read_scanlines_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* scanlines, uint32 max_lines);
406static int jpeg_read_raw_data_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* data, uint32 max_lines);
407static void jpeg_encap_unwind(TIFF* tif);
408#endif
8414a40c 409
80ed523f
VZ		 410static void OJPEGLibjpegJpegErrorMgrOutputMessage(jpeg_common_struct* cinfo);
411static void OJPEGLibjpegJpegErrorMgrErrorExit(jpeg_common_struct* cinfo);
412static void OJPEGLibjpegJpegSourceMgrInitSource(jpeg_decompress_struct* cinfo);
413static boolean OJPEGLibjpegJpegSourceMgrFillInputBuffer(jpeg_decompress_struct* cinfo);
414static void OJPEGLibjpegJpegSourceMgrSkipInputData(jpeg_decompress_struct* cinfo, long num_bytes);
415static boolean OJPEGLibjpegJpegSourceMgrResyncToRestart(jpeg_decompress_struct* cinfo, int desired);
416static void OJPEGLibjpegJpegSourceMgrTermSource(jpeg_decompress_struct* cinfo);
8414a40c 417
80ed523f
VZ		 418int
419TIFFInitOJPEG(TIFF* tif, int scheme)
420{
421 static const char module[]="TIFFInitOJPEG";
422 OJPEGState* sp;
423
424 assert(scheme==COMPRESSION_OJPEG);
425
426 /*
427 * Merge codec-specific tag information.
428 */
429 if (!_TIFFMergeFields(tif, ojpegFields, TIFFArrayCount(ojpegFields))) {
430 TIFFErrorExt(tif->tif_clientdata, module,
431 "Merging Old JPEG codec-specific tags failed");
432 return 0;
433 }
8414a40c 434
80ed523f
VZ		 435 /* state block */
436 sp=_TIFFmalloc(sizeof(OJPEGState));
437 if (sp==NULL)
438 {
439 TIFFErrorExt(tif->tif_clientdata,module,"No space for OJPEG state block");
440 return(0);
441 }
442 _TIFFmemset(sp,0,sizeof(OJPEGState));
443 sp->tif=tif;
444 sp->jpeg_proc=1;
445 sp->subsampling_hor=2;
446 sp->subsampling_ver=2;
447 TIFFSetField(tif,TIFFTAG_YCBCRSUBSAMPLING,2,2);
448 /* tif codec methods */
449 tif->tif_fixuptags=OJPEGFixupTags;
450 tif->tif_setupdecode=OJPEGSetupDecode;
451 tif->tif_predecode=OJPEGPreDecode;
452 tif->tif_postdecode=OJPEGPostDecode;
453 tif->tif_decoderow=OJPEGDecode;
454 tif->tif_decodestrip=OJPEGDecode;
455 tif->tif_decodetile=OJPEGDecode;
456 tif->tif_setupencode=OJPEGSetupEncode;
457 tif->tif_preencode=OJPEGPreEncode;
458 tif->tif_postencode=OJPEGPostEncode;
459 tif->tif_encoderow=OJPEGEncode;
460 tif->tif_encodestrip=OJPEGEncode;
461 tif->tif_encodetile=OJPEGEncode;
462 tif->tif_cleanup=OJPEGCleanup;
463 tif->tif_data=(uint8*)sp;
464 /* tif tag methods */
465 sp->vgetparent=tif->tif_tagmethods.vgetfield;
466 tif->tif_tagmethods.vgetfield=OJPEGVGetField;
467 sp->vsetparent=tif->tif_tagmethods.vsetfield;
468 tif->tif_tagmethods.vsetfield=OJPEGVSetField;
469 sp->printdir=tif->tif_tagmethods.printdir;
470 tif->tif_tagmethods.printdir=OJPEGPrintDir;
471 /* Some OJPEG files don't have strip or tile offsets or bytecounts tags.
472 Some others do, but have totally meaningless or corrupt values
473 in these tags. In these cases, the JpegInterchangeFormat stream is
474 reliable. In any case, this decoder reads the compressed data itself,
475 from the most reliable locations, and we need to notify encapsulating
476 LibTiff not to read raw strips or tiles for us. */
477 tif->tif_flags|=TIFF_NOREADRAW;
478 return(1);
479}
8414a40c 480
80ed523f
VZ		 481static int
482OJPEGVGetField(TIFF* tif, uint32 tag, va_list ap)
483{
484 OJPEGState* sp=(OJPEGState*)tif->tif_data;
485 switch(tag)
486 {
487 case TIFFTAG_JPEGIFOFFSET:
488 *va_arg(ap,uint64*)=(uint64)sp->jpeg_interchange_format;
489 break;
490 case TIFFTAG_JPEGIFBYTECOUNT:
491 *va_arg(ap,uint64*)=(uint64)sp->jpeg_interchange_format_length;
492 break;
493 case TIFFTAG_YCBCRSUBSAMPLING:
494 if (sp->subsamplingcorrect_done==0)
495 OJPEGSubsamplingCorrect(tif);
496 *va_arg(ap,uint16*)=(uint16)sp->subsampling_hor;
497 *va_arg(ap,uint16*)=(uint16)sp->subsampling_ver;
498 break;
499 case TIFFTAG_JPEGQTABLES:
500 *va_arg(ap,uint32*)=(uint32)sp->qtable_offset_count;
501 *va_arg(ap,void**)=(void*)sp->qtable_offset;
502 break;
503 case TIFFTAG_JPEGDCTABLES:
504 *va_arg(ap,uint32*)=(uint32)sp->dctable_offset_count;
505 *va_arg(ap,void**)=(void*)sp->dctable_offset;
506 break;
507 case TIFFTAG_JPEGACTABLES:
508 *va_arg(ap,uint32*)=(uint32)sp->actable_offset_count;
509 *va_arg(ap,void**)=(void*)sp->actable_offset;
510 break;
511 case TIFFTAG_JPEGPROC:
512 *va_arg(ap,uint16*)=(uint16)sp->jpeg_proc;
513 break;
514 case TIFFTAG_JPEGRESTARTINTERVAL:
515 *va_arg(ap,uint16*)=sp->restart_interval;
516 break;
517 default:
518 return (*sp->vgetparent)(tif,tag,ap);
519 }
520 return (1);
521}
8414a40c 522
80ed523f
VZ		 523static int
524OJPEGVSetField(TIFF* tif, uint32 tag, va_list ap)
8414a40c 525{
80ed523f
VZ		 526 static const char module[]="OJPEGVSetField";
527 OJPEGState* sp=(OJPEGState*)tif->tif_data;
528 uint32 ma;
529 uint64* mb;
530 uint32 n;
531 switch(tag)
532 {
533 case TIFFTAG_JPEGIFOFFSET:
534 sp->jpeg_interchange_format=(uint64)va_arg(ap,uint64);
535 break;
536 case TIFFTAG_JPEGIFBYTECOUNT:
537 sp->jpeg_interchange_format_length=(uint64)va_arg(ap,uint64);
538 break;
539 case TIFFTAG_YCBCRSUBSAMPLING:
540 sp->subsampling_tag=1;
541 sp->subsampling_hor=(uint8)va_arg(ap,uint16_vap);
542 sp->subsampling_ver=(uint8)va_arg(ap,uint16_vap);
543 tif->tif_dir.td_ycbcrsubsampling[0]=sp->subsampling_hor;
544 tif->tif_dir.td_ycbcrsubsampling[1]=sp->subsampling_ver;
545 break;
546 case TIFFTAG_JPEGQTABLES:
547 ma=(uint32)va_arg(ap,uint32);
548 if (ma!=0)
549 {
550 if (ma>3)
551 {
552 TIFFErrorExt(tif->tif_clientdata,module,"JpegQTables tag has incorrect count");
553 return(0);
554 }
555 sp->qtable_offset_count=(uint8)ma;
556 mb=(uint64*)va_arg(ap,uint64*);
557 for (n=0; n<ma; n++)
558 sp->qtable_offset[n]=mb[n];
559 }
560 break;
561 case TIFFTAG_JPEGDCTABLES:
562 ma=(uint32)va_arg(ap,uint32);
563 if (ma!=0)
564 {
565 if (ma>3)
566 {
567 TIFFErrorExt(tif->tif_clientdata,module,"JpegDcTables tag has incorrect count");
568 return(0);
569 }
570 sp->dctable_offset_count=(uint8)ma;
571 mb=(uint64*)va_arg(ap,uint64*);
572 for (n=0; n<ma; n++)
573 sp->dctable_offset[n]=mb[n];
574 }
575 break;
576 case TIFFTAG_JPEGACTABLES:
577 ma=(uint32)va_arg(ap,uint32);
578 if (ma!=0)
579 {
580 if (ma>3)
581 {
582 TIFFErrorExt(tif->tif_clientdata,module,"JpegAcTables tag has incorrect count");
583 return(0);
584 }
585 sp->actable_offset_count=(uint8)ma;
586 mb=(uint64*)va_arg(ap,uint64*);
587 for (n=0; n<ma; n++)
588 sp->actable_offset[n]=mb[n];
589 }
590 break;
591 case TIFFTAG_JPEGPROC:
592 sp->jpeg_proc=(uint8)va_arg(ap,uint16_vap);
593 break;
594 case TIFFTAG_JPEGRESTARTINTERVAL:
595 sp->restart_interval=(uint16)va_arg(ap,uint16_vap);
596 break;
597 default:
598 return (*sp->vsetparent)(tif,tag,ap);
599 }
600 TIFFSetFieldBit(tif,TIFFFieldWithTag(tif,tag)->field_bit);
601 tif->tif_flags|=TIFF_DIRTYDIRECT;
602 return(1);
8414a40c
VZ		 603}
604
605static void
80ed523f
VZ		 606OJPEGPrintDir(TIFF* tif, FILE* fd, long flags)
607{
608 OJPEGState* sp=(OJPEGState*)tif->tif_data;
609 uint8 m;
610 (void)flags;
611 assert(sp!=NULL);
612 if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGINTERCHANGEFORMAT))
613 fprintf(fd," JpegInterchangeFormat: " TIFF_UINT64_FORMAT "\n",(TIFF_UINT64_T)sp->jpeg_interchange_format);
614 if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH))
615 fprintf(fd," JpegInterchangeFormatLength: " TIFF_UINT64_FORMAT "\n",(TIFF_UINT64_T)sp->jpeg_interchange_format_length);
616 if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGQTABLES))
617 {
618 fprintf(fd," JpegQTables:");
619 for (m=0; m<sp->qtable_offset_count; m++)
620 fprintf(fd," " TIFF_UINT64_FORMAT,(TIFF_UINT64_T)sp->qtable_offset[m]);
621 fprintf(fd,"\n");
622 }
623 if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGDCTABLES))
624 {
625 fprintf(fd," JpegDcTables:");
626 for (m=0; m<sp->dctable_offset_count; m++)
627 fprintf(fd," " TIFF_UINT64_FORMAT,(TIFF_UINT64_T)sp->dctable_offset[m]);
628 fprintf(fd,"\n");
629 }
630 if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGACTABLES))
631 {
632 fprintf(fd," JpegAcTables:");
633 for (m=0; m<sp->actable_offset_count; m++)
634 fprintf(fd," " TIFF_UINT64_FORMAT,(TIFF_UINT64_T)sp->actable_offset[m]);
635 fprintf(fd,"\n");
636 }
637 if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGPROC))
638 fprintf(fd," JpegProc: %u\n",(unsigned int)sp->jpeg_proc);
639 if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGRESTARTINTERVAL))
640 fprintf(fd," JpegRestartInterval: %u\n",(unsigned int)sp->restart_interval);
641 if (sp->printdir)
642 (*sp->printdir)(tif, fd, flags);
643}
8414a40c 644
80ed523f
VZ		 645static int
646OJPEGFixupTags(TIFF* tif)
647{
648 (void) tif;
649 return(1);
650}
8414a40c 651
80ed523f
VZ		 652static int
653OJPEGSetupDecode(TIFF* tif)
654{
655 static const char module[]="OJPEGSetupDecode";
656 TIFFWarningExt(tif->tif_clientdata,module,"Depreciated and troublesome old-style JPEG compression mode, please convert to new-style JPEG compression and notify vendor of writing software");
657 return(1);
658}
8414a40c
VZ		 659
660static int
80ed523f
VZ		 661OJPEGPreDecode(TIFF* tif, uint16 s)
662{
663 OJPEGState* sp=(OJPEGState*)tif->tif_data;
664 uint32 m;
665 if (sp->subsamplingcorrect_done==0)
666 OJPEGSubsamplingCorrect(tif);
667 if (sp->readheader_done==0)
668 {
669 if (OJPEGReadHeaderInfo(tif)==0)
670 return(0);
671 }
672 if (sp->sos_end[s].log==0)
673 {
674 if (OJPEGReadSecondarySos(tif,s)==0)
675 return(0);
676 }
677 if isTiled(tif)
678 m=tif->tif_curtile;
679 else
680 m=tif->tif_curstrip;
681 if ((sp->writeheader_done!=0) && ((sp->write_cursample!=s) || (sp->write_curstrile>m)))
682 {
683 if (sp->libjpeg_session_active!=0)
684 OJPEGLibjpegSessionAbort(tif);
685 sp->writeheader_done=0;
686 }
687 if (sp->writeheader_done==0)
688 {
689 sp->plane_sample_offset=(uint8)s;
690 sp->write_cursample=s;
691 sp->write_curstrile=s*tif->tif_dir.td_stripsperimage;
692 if ((sp->in_buffer_file_pos_log==0) ||
693 (sp->in_buffer_file_pos-sp->in_buffer_togo!=sp->sos_end[s].in_buffer_file_pos))
694 {
695 sp->in_buffer_source=sp->sos_end[s].in_buffer_source;
696 sp->in_buffer_next_strile=sp->sos_end[s].in_buffer_next_strile;
697 sp->in_buffer_file_pos=sp->sos_end[s].in_buffer_file_pos;
698 sp->in_buffer_file_pos_log=0;
699 sp->in_buffer_file_togo=sp->sos_end[s].in_buffer_file_togo;
700 sp->in_buffer_togo=0;
701 sp->in_buffer_cur=0;
702 }
703 if (OJPEGWriteHeaderInfo(tif)==0)
704 return(0);
705 }
706 while (sp->write_curstrile<m)
707 {
708 if (sp->libjpeg_jpeg_query_style==0)
709 {
710 if (OJPEGPreDecodeSkipRaw(tif)==0)
711 return(0);
712 }
713 else
714 {
715 if (OJPEGPreDecodeSkipScanlines(tif)==0)
716 return(0);
717 }
718 sp->write_curstrile++;
719 }
720 return(1);
721}
8414a40c 722
80ed523f
VZ		 723static int
724OJPEGPreDecodeSkipRaw(TIFF* tif)
725{
726 OJPEGState* sp=(OJPEGState*)tif->tif_data;
727 uint32 m;
728 m=sp->lines_per_strile;
729 if (sp->subsampling_convert_state!=0)
730 {
731 if (sp->subsampling_convert_clines-sp->subsampling_convert_state>=m)
732 {
733 sp->subsampling_convert_state+=m;
734 if (sp->subsampling_convert_state==sp->subsampling_convert_clines)
735 sp->subsampling_convert_state=0;
736 return(1);
737 }
738 m-=sp->subsampling_convert_clines-sp->subsampling_convert_state;
739 sp->subsampling_convert_state=0;
740 }
741 while (m>=sp->subsampling_convert_clines)
742 {
743 if (jpeg_read_raw_data_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),sp->subsampling_convert_ycbcrimage,sp->subsampling_ver*8)==0)
744 return(0);
745 m-=sp->subsampling_convert_clines;
746 }
747 if (m>0)
748 {
749 if (jpeg_read_raw_data_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),sp->subsampling_convert_ycbcrimage,sp->subsampling_ver*8)==0)
750 return(0);
751 sp->subsampling_convert_state=m;
752 }
753 return(1);
754}
8414a40c 755
80ed523f
VZ		 756static int
757OJPEGPreDecodeSkipScanlines(TIFF* tif)
758{
759 static const char module[]="OJPEGPreDecodeSkipScanlines";
760 OJPEGState* sp=(OJPEGState*)tif->tif_data;
761 uint32 m;
762 if (sp->skip_buffer==NULL)
763 {
764 sp->skip_buffer=_TIFFmalloc(sp->bytes_per_line);
765 if (sp->skip_buffer==NULL)
766 {
767 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
768 return(0);
769 }
770 }
771 for (m=0; m<sp->lines_per_strile; m++)
772 {
773 if (jpeg_read_scanlines_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),&sp->skip_buffer,1)==0)
774 return(0);
775 }
776 return(1);
777}
778
779static int
780OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s)
781{
782 OJPEGState* sp=(OJPEGState*)tif->tif_data;
783 (void)s;
784 if (sp->libjpeg_jpeg_query_style==0)
785 {
786 if (OJPEGDecodeRaw(tif,buf,cc)==0)
787 return(0);
788 }
789 else
790 {
791 if (OJPEGDecodeScanlines(tif,buf,cc)==0)
792 return(0);
793 }
794 return(1);
795}
8414a40c 796
80ed523f
VZ		 797static int
798OJPEGDecodeRaw(TIFF* tif, uint8* buf, tmsize_t cc)
799{
800 static const char module[]="OJPEGDecodeRaw";
801 OJPEGState* sp=(OJPEGState*)tif->tif_data;
802 uint8* m;
803 tmsize_t n;
804 uint8* oy;
805 uint8* ocb;
806 uint8* ocr;
807 uint8* p;
808 uint32 q;
809 uint8* r;
810 uint8 sx,sy;
811 if (cc%sp->bytes_per_line!=0)
812 {
813 TIFFErrorExt(tif->tif_clientdata,module,"Fractional scanline not read");
814 return(0);
815 }
816 assert(cc>0);
817 m=buf;
818 n=cc;
819 do
820 {
821 if (sp->subsampling_convert_state==0)
822 {
823 if (jpeg_read_raw_data_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),sp->subsampling_convert_ycbcrimage,sp->subsampling_ver*8)==0)
824 return(0);
825 }
826 oy=sp->subsampling_convert_ybuf+sp->subsampling_convert_state*sp->subsampling_ver*sp->subsampling_convert_ylinelen;
827 ocb=sp->subsampling_convert_cbbuf+sp->subsampling_convert_state*sp->subsampling_convert_clinelen;
828 ocr=sp->subsampling_convert_crbuf+sp->subsampling_convert_state*sp->subsampling_convert_clinelen;
829 p=m;
830 for (q=0; q<sp->subsampling_convert_clinelenout; q++)
831 {
832 r=oy;
833 for (sy=0; sy<sp->subsampling_ver; sy++)
834 {
835 for (sx=0; sx<sp->subsampling_hor; sx++)
836 *p++=*r++;
837 r+=sp->subsampling_convert_ylinelen-sp->subsampling_hor;
838 }
839 oy+=sp->subsampling_hor;
840 *p++=*ocb++;
841 *p++=*ocr++;
842 }
843 sp->subsampling_convert_state++;
844 if (sp->subsampling_convert_state==sp->subsampling_convert_clines)
845 sp->subsampling_convert_state=0;
846 m+=sp->bytes_per_line;
847 n-=sp->bytes_per_line;
848 } while(n>0);
849 return(1);
850}
8414a40c 851
80ed523f
VZ		 852static int
853OJPEGDecodeScanlines(TIFF* tif, uint8* buf, tmsize_t cc)
854{
855 static const char module[]="OJPEGDecodeScanlines";
856 OJPEGState* sp=(OJPEGState*)tif->tif_data;
857 uint8* m;
858 tmsize_t n;
859 if (cc%sp->bytes_per_line!=0)
860 {
861 TIFFErrorExt(tif->tif_clientdata,module,"Fractional scanline not read");
862 return(0);
863 }
864 assert(cc>0);
865 m=buf;
866 n=cc;
867 do
868 {
869 if (jpeg_read_scanlines_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),&m,1)==0)
870 return(0);
871 m+=sp->bytes_per_line;
872 n-=sp->bytes_per_line;
873 } while(n>0);
874 return(1);
875}
8414a40c
VZ		 876
877static void
80ed523f
VZ		 878OJPEGPostDecode(TIFF* tif, uint8* buf, tmsize_t cc)
879{
880 OJPEGState* sp=(OJPEGState*)tif->tif_data;
881 (void)buf;
882 (void)cc;
883 sp->write_curstrile++;
884 if (sp->write_curstrile%tif->tif_dir.td_stripsperimage==0)
885 {
886 assert(sp->libjpeg_session_active!=0);
887 OJPEGLibjpegSessionAbort(tif);
888 sp->writeheader_done=0;
889 }
890}
8414a40c 891
80ed523f
VZ		 892static int
893OJPEGSetupEncode(TIFF* tif)
894{
895 static const char module[]="OJPEGSetupEncode";
896 TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
897 return(0);
898}
8414a40c 899
80ed523f
VZ		 900static int
901OJPEGPreEncode(TIFF* tif, uint16 s)
902{
903 static const char module[]="OJPEGPreEncode";
904 (void)s;
905 TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
906 return(0);
907}
8414a40c
VZ		 908
909static int
80ed523f
VZ		 910OJPEGEncode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s)
911{
912 static const char module[]="OJPEGEncode";
913 (void)buf;
914 (void)cc;
915 (void)s;
916 TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
917 return(0);
918}
8414a40c 919
80ed523f
VZ		 920static int
921OJPEGPostEncode(TIFF* tif)
922{
923 static const char module[]="OJPEGPostEncode";
924 TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
925 return(0);
926}
8414a40c 927
8414a40c 928static void
80ed523f
VZ		 929OJPEGCleanup(TIFF* tif)
930{
931 OJPEGState* sp=(OJPEGState*)tif->tif_data;
932 if (sp!=0)
933 {
934 tif->tif_tagmethods.vgetfield=sp->vgetparent;
935 tif->tif_tagmethods.vsetfield=sp->vsetparent;
936 tif->tif_tagmethods.printdir=sp->printdir;
937 if (sp->qtable[0]!=0)
938 _TIFFfree(sp->qtable[0]);
939 if (sp->qtable[1]!=0)
940 _TIFFfree(sp->qtable[1]);
941 if (sp->qtable[2]!=0)
942 _TIFFfree(sp->qtable[2]);
943 if (sp->qtable[3]!=0)
944 _TIFFfree(sp->qtable[3]);
945 if (sp->dctable[0]!=0)
946 _TIFFfree(sp->dctable[0]);
947 if (sp->dctable[1]!=0)
948 _TIFFfree(sp->dctable[1]);
949 if (sp->dctable[2]!=0)
950 _TIFFfree(sp->dctable[2]);
951 if (sp->dctable[3]!=0)
952 _TIFFfree(sp->dctable[3]);
953 if (sp->actable[0]!=0)
954 _TIFFfree(sp->actable[0]);
955 if (sp->actable[1]!=0)
956 _TIFFfree(sp->actable[1]);
957 if (sp->actable[2]!=0)
958 _TIFFfree(sp->actable[2]);
959 if (sp->actable[3]!=0)
960 _TIFFfree(sp->actable[3]);
961 if (sp->libjpeg_session_active!=0)
962 OJPEGLibjpegSessionAbort(tif);
963 if (sp->subsampling_convert_ycbcrbuf!=0)
964 _TIFFfree(sp->subsampling_convert_ycbcrbuf);
965 if (sp->subsampling_convert_ycbcrimage!=0)
966 _TIFFfree(sp->subsampling_convert_ycbcrimage);
967 if (sp->skip_buffer!=0)
968 _TIFFfree(sp->skip_buffer);
969 _TIFFfree(sp);
970 tif->tif_data=NULL;
971 _TIFFSetDefaultCompressionState(tif);
972 }
973}
8414a40c 974
80ed523f
VZ		 975static void
976OJPEGSubsamplingCorrect(TIFF* tif)
977{
978 static const char module[]="OJPEGSubsamplingCorrect";
979 OJPEGState* sp=(OJPEGState*)tif->tif_data;
980 uint8 mh;
981 uint8 mv;
982 _TIFFFillStriles( tif );
983
984 assert(sp->subsamplingcorrect_done==0);
985 if ((tif->tif_dir.td_samplesperpixel!=3) || ((tif->tif_dir.td_photometric!=PHOTOMETRIC_YCBCR) &&
986 (tif->tif_dir.td_photometric!=PHOTOMETRIC_ITULAB)))
987 {
988 if (sp->subsampling_tag!=0)
989 TIFFWarningExt(tif->tif_clientdata,module,"Subsampling tag not appropriate for this Photometric and/or SamplesPerPixel");
990 sp->subsampling_hor=1;
991 sp->subsampling_ver=1;
992 sp->subsampling_force_desubsampling_inside_decompression=0;
993 }
994 else
995 {
996 sp->subsamplingcorrect_done=1;
997 mh=sp->subsampling_hor;
998 mv=sp->subsampling_ver;
999 sp->subsamplingcorrect=1;
1000 OJPEGReadHeaderInfoSec(tif);
1001 if (sp->subsampling_force_desubsampling_inside_decompression!=0)
1002 {
1003 sp->subsampling_hor=1;
1004 sp->subsampling_ver=1;
1005 }
1006 sp->subsamplingcorrect=0;
1007 if (((sp->subsampling_hor!=mh) || (sp->subsampling_ver!=mv)) && (sp->subsampling_force_desubsampling_inside_decompression==0))
1008 {
1009 if (sp->subsampling_tag==0)
1010 TIFFWarningExt(tif->tif_clientdata,module,"Subsampling tag is not set, yet subsampling inside JPEG data [%d,%d] does not match default values [2,2]; assuming subsampling inside JPEG data is correct",sp->subsampling_hor,sp->subsampling_ver);
1011 else
1012 TIFFWarningExt(tif->tif_clientdata,module,"Subsampling inside JPEG data [%d,%d] does not match subsampling tag values [%d,%d]; assuming subsampling inside JPEG data is correct",sp->subsampling_hor,sp->subsampling_ver,mh,mv);
1013 }
1014 if (sp->subsampling_force_desubsampling_inside_decompression!=0)
1015 {
1016 if (sp->subsampling_tag==0)
1017 TIFFWarningExt(tif->tif_clientdata,module,"Subsampling tag is not set, yet subsampling inside JPEG data does not match default values [2,2] (nor any other values allowed in TIFF); assuming subsampling inside JPEG data is correct and desubsampling inside JPEG decompression");
1018 else
1019 TIFFWarningExt(tif->tif_clientdata,module,"Subsampling inside JPEG data does not match subsampling tag values [%d,%d] (nor any other values allowed in TIFF); assuming subsampling inside JPEG data is correct and desubsampling inside JPEG decompression",mh,mv);
1020 }
1021 if (sp->subsampling_force_desubsampling_inside_decompression==0)
1022 {
1023 if (sp->subsampling_hor<sp->subsampling_ver)
1024 TIFFWarningExt(tif->tif_clientdata,module,"Subsampling values [%d,%d] are not allowed in TIFF",sp->subsampling_hor,sp->subsampling_ver);
1025 }
1026 }
1027 sp->subsamplingcorrect_done=1;
1028}
8414a40c 1029
80ed523f
VZ		 1030static int
1031OJPEGReadHeaderInfo(TIFF* tif)
1032{
1033 static const char module[]="OJPEGReadHeaderInfo";
1034 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1035 assert(sp->readheader_done==0);
1036 sp->image_width=tif->tif_dir.td_imagewidth;
1037 sp->image_length=tif->tif_dir.td_imagelength;
1038 if isTiled(tif)
1039 {
1040 sp->strile_width=tif->tif_dir.td_tilewidth;
1041 sp->strile_length=tif->tif_dir.td_tilelength;
1042 sp->strile_length_total=((sp->image_length+sp->strile_length-1)/sp->strile_length)*sp->strile_length;
1043 }
1044 else
1045 {
1046 sp->strile_width=sp->image_width;
1047 sp->strile_length=tif->tif_dir.td_rowsperstrip;
1048 sp->strile_length_total=sp->image_length;
1049 }
1050 if (tif->tif_dir.td_samplesperpixel==1)
1051 {
1052 sp->samples_per_pixel=1;
1053 sp->plane_sample_offset=0;
1054 sp->samples_per_pixel_per_plane=sp->samples_per_pixel;
1055 sp->subsampling_hor=1;
1056 sp->subsampling_ver=1;
1057 }
1058 else
1059 {
1060 if (tif->tif_dir.td_samplesperpixel!=3)
1061 {
1062 TIFFErrorExt(tif->tif_clientdata,module,"SamplesPerPixel %d not supported for this compression scheme",sp->samples_per_pixel);
1063 return(0);
1064 }
1065 sp->samples_per_pixel=3;
1066 sp->plane_sample_offset=0;
1067 if (tif->tif_dir.td_planarconfig==PLANARCONFIG_CONTIG)
1068 sp->samples_per_pixel_per_plane=3;
1069 else
1070 sp->samples_per_pixel_per_plane=1;
1071 }
1072 if (sp->strile_length<sp->image_length)
1073 {
1074 if (sp->strile_length%(sp->subsampling_ver*8)!=0)
1075 {
1076 TIFFErrorExt(tif->tif_clientdata,module,"Incompatible vertical subsampling and image strip/tile length");
1077 return(0);
1078 }
1079 sp->restart_interval=((sp->strile_width+sp->subsampling_hor*8-1)/(sp->subsampling_hor*8))*(sp->strile_length/(sp->subsampling_ver*8));
1080 }
1081 if (OJPEGReadHeaderInfoSec(tif)==0)
1082 return(0);
1083 sp->sos_end[0].log=1;
1084 sp->sos_end[0].in_buffer_source=sp->in_buffer_source;
1085 sp->sos_end[0].in_buffer_next_strile=sp->in_buffer_next_strile;
1086 sp->sos_end[0].in_buffer_file_pos=sp->in_buffer_file_pos-sp->in_buffer_togo;
1087 sp->sos_end[0].in_buffer_file_togo=sp->in_buffer_file_togo+sp->in_buffer_togo;
1088 sp->readheader_done=1;
1089 return(1);
1090}
1091
1092static int
1093OJPEGReadSecondarySos(TIFF* tif, uint16 s)
1094{
1095 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1096 uint8 m;
1097 assert(s>0);
1098 assert(s<3);
1099 assert(sp->sos_end[0].log!=0);
1100 assert(sp->sos_end[s].log==0);
1101 sp->plane_sample_offset=s-1;
1102 while(sp->sos_end[sp->plane_sample_offset].log==0)
1103 sp->plane_sample_offset--;
1104 sp->in_buffer_source=sp->sos_end[sp->plane_sample_offset].in_buffer_source;
1105 sp->in_buffer_next_strile=sp->sos_end[sp->plane_sample_offset].in_buffer_next_strile;
1106 sp->in_buffer_file_pos=sp->sos_end[sp->plane_sample_offset].in_buffer_file_pos;
1107 sp->in_buffer_file_pos_log=0;
1108 sp->in_buffer_file_togo=sp->sos_end[sp->plane_sample_offset].in_buffer_file_togo;
1109 sp->in_buffer_togo=0;
1110 sp->in_buffer_cur=0;
1111 while(sp->plane_sample_offset<s)
1112 {
1113 do
1114 {
1115 if (OJPEGReadByte(sp,&m)==0)
1116 return(0);
1117 if (m==255)
1118 {
1119 do
1120 {
1121 if (OJPEGReadByte(sp,&m)==0)
1122 return(0);
1123 if (m!=255)
1124 break;
1125 } while(1);
1126 if (m==JPEG_MARKER_SOS)
1127 break;
1128 }
1129 } while(1);
1130 sp->plane_sample_offset++;
1131 if (OJPEGReadHeaderInfoSecStreamSos(tif)==0)
1132 return(0);
1133 sp->sos_end[sp->plane_sample_offset].log=1;
1134 sp->sos_end[sp->plane_sample_offset].in_buffer_source=sp->in_buffer_source;
1135 sp->sos_end[sp->plane_sample_offset].in_buffer_next_strile=sp->in_buffer_next_strile;
1136 sp->sos_end[sp->plane_sample_offset].in_buffer_file_pos=sp->in_buffer_file_pos-sp->in_buffer_togo;
1137 sp->sos_end[sp->plane_sample_offset].in_buffer_file_togo=sp->in_buffer_file_togo+sp->in_buffer_togo;
1138 }
1139 return(1);
1140}
1141
1142static int
1143OJPEGWriteHeaderInfo(TIFF* tif)
1144{
1145 static const char module[]="OJPEGWriteHeaderInfo";
1146 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1147 uint8** m;
1148 uint32 n;
1149 /* if a previous attempt failed, don't try again */
1150 if (sp->libjpeg_session_active != 0)
1151 return 0;
1152 sp->out_state=ososSoi;
1153 sp->restart_index=0;
1154 jpeg_std_error(&(sp->libjpeg_jpeg_error_mgr));
1155 sp->libjpeg_jpeg_error_mgr.output_message=OJPEGLibjpegJpegErrorMgrOutputMessage;
1156 sp->libjpeg_jpeg_error_mgr.error_exit=OJPEGLibjpegJpegErrorMgrErrorExit;
1157 sp->libjpeg_jpeg_decompress_struct.err=&(sp->libjpeg_jpeg_error_mgr);
1158 sp->libjpeg_jpeg_decompress_struct.client_data=(void*)tif;
1159 if (jpeg_create_decompress_encap(sp,&(sp->libjpeg_jpeg_decompress_struct))==0)
1160 return(0);
1161 sp->libjpeg_session_active=1;
1162 sp->libjpeg_jpeg_source_mgr.bytes_in_buffer=0;
1163 sp->libjpeg_jpeg_source_mgr.init_source=OJPEGLibjpegJpegSourceMgrInitSource;
1164 sp->libjpeg_jpeg_source_mgr.fill_input_buffer=OJPEGLibjpegJpegSourceMgrFillInputBuffer;
1165 sp->libjpeg_jpeg_source_mgr.skip_input_data=OJPEGLibjpegJpegSourceMgrSkipInputData;
1166 sp->libjpeg_jpeg_source_mgr.resync_to_restart=OJPEGLibjpegJpegSourceMgrResyncToRestart;
1167 sp->libjpeg_jpeg_source_mgr.term_source=OJPEGLibjpegJpegSourceMgrTermSource;
1168 sp->libjpeg_jpeg_decompress_struct.src=&(sp->libjpeg_jpeg_source_mgr);
1169 if (jpeg_read_header_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),1)==0)
1170 return(0);
1171 if ((sp->subsampling_force_desubsampling_inside_decompression==0) && (sp->samples_per_pixel_per_plane>1))
1172 {
1173 sp->libjpeg_jpeg_decompress_struct.raw_data_out=1;
1174#if JPEG_LIB_VERSION >= 70
1175 sp->libjpeg_jpeg_decompress_struct.do_fancy_upsampling=FALSE;
1176#endif
1177 sp->libjpeg_jpeg_query_style=0;
1178 if (sp->subsampling_convert_log==0)
1179 {
1180 assert(sp->subsampling_convert_ycbcrbuf==0);
1181 assert(sp->subsampling_convert_ycbcrimage==0);
1182 sp->subsampling_convert_ylinelen=((sp->strile_width+sp->subsampling_hor*8-1)/(sp->subsampling_hor*8)*sp->subsampling_hor*8);
1183 sp->subsampling_convert_ylines=sp->subsampling_ver*8;
1184 sp->subsampling_convert_clinelen=sp->subsampling_convert_ylinelen/sp->subsampling_hor;
1185 sp->subsampling_convert_clines=8;
1186 sp->subsampling_convert_ybuflen=sp->subsampling_convert_ylinelen*sp->subsampling_convert_ylines;
1187 sp->subsampling_convert_cbuflen=sp->subsampling_convert_clinelen*sp->subsampling_convert_clines;
1188 sp->subsampling_convert_ycbcrbuflen=sp->subsampling_convert_ybuflen+2*sp->subsampling_convert_cbuflen;
1189 sp->subsampling_convert_ycbcrbuf=_TIFFmalloc(sp->subsampling_convert_ycbcrbuflen);
1190 if (sp->subsampling_convert_ycbcrbuf==0)
1191 {
1192 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
1193 return(0);
1194 }
1195 sp->subsampling_convert_ybuf=sp->subsampling_convert_ycbcrbuf;
1196 sp->subsampling_convert_cbbuf=sp->subsampling_convert_ybuf+sp->subsampling_convert_ybuflen;
1197 sp->subsampling_convert_crbuf=sp->subsampling_convert_cbbuf+sp->subsampling_convert_cbuflen;
1198 sp->subsampling_convert_ycbcrimagelen=3+sp->subsampling_convert_ylines+2*sp->subsampling_convert_clines;
1199 sp->subsampling_convert_ycbcrimage=_TIFFmalloc(sp->subsampling_convert_ycbcrimagelen*sizeof(uint8*));
1200 if (sp->subsampling_convert_ycbcrimage==0)
1201 {
1202 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
1203 return(0);
1204 }
1205 m=sp->subsampling_convert_ycbcrimage;
1206 *m++=(uint8*)(sp->subsampling_convert_ycbcrimage+3);
1207 *m++=(uint8*)(sp->subsampling_convert_ycbcrimage+3+sp->subsampling_convert_ylines);
1208 *m++=(uint8*)(sp->subsampling_convert_ycbcrimage+3+sp->subsampling_convert_ylines+sp->subsampling_convert_clines);
1209 for (n=0; n<sp->subsampling_convert_ylines; n++)
1210 *m++=sp->subsampling_convert_ybuf+n*sp->subsampling_convert_ylinelen;
1211 for (n=0; n<sp->subsampling_convert_clines; n++)
1212 *m++=sp->subsampling_convert_cbbuf+n*sp->subsampling_convert_clinelen;
1213 for (n=0; n<sp->subsampling_convert_clines; n++)
1214 *m++=sp->subsampling_convert_crbuf+n*sp->subsampling_convert_clinelen;
1215 sp->subsampling_convert_clinelenout=((sp->strile_width+sp->subsampling_hor-1)/sp->subsampling_hor);
1216 sp->subsampling_convert_state=0;
1217 sp->bytes_per_line=sp->subsampling_convert_clinelenout*(sp->subsampling_ver*sp->subsampling_hor+2);
1218 sp->lines_per_strile=((sp->strile_length+sp->subsampling_ver-1)/sp->subsampling_ver);
1219 sp->subsampling_convert_log=1;
1220 }
1221 }
1222 else
1223 {
1224 sp->libjpeg_jpeg_decompress_struct.jpeg_color_space=JCS_UNKNOWN;
1225 sp->libjpeg_jpeg_decompress_struct.out_color_space=JCS_UNKNOWN;
1226 sp->libjpeg_jpeg_query_style=1;
1227 sp->bytes_per_line=sp->samples_per_pixel_per_plane*sp->strile_width;
1228 sp->lines_per_strile=sp->strile_length;
1229 }
1230 if (jpeg_start_decompress_encap(sp,&(sp->libjpeg_jpeg_decompress_struct))==0)
1231 return(0);
1232 sp->writeheader_done=1;
1233 return(1);
1234}
8414a40c
VZ		 1235
1236static void
80ed523f
VZ		 1237OJPEGLibjpegSessionAbort(TIFF* tif)
1238{
1239 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1240 assert(sp->libjpeg_session_active!=0);
1241 jpeg_destroy((jpeg_common_struct*)(&(sp->libjpeg_jpeg_decompress_struct)));
1242 sp->libjpeg_session_active=0;
1243}
1244
8414a40c 1245static int
80ed523f
VZ		 1246OJPEGReadHeaderInfoSec(TIFF* tif)
1247{
1248 static const char module[]="OJPEGReadHeaderInfoSec";
1249 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1250 uint8 m;
1251 uint16 n;
1252 uint8 o;
1253 if (sp->file_size==0)
1254 sp->file_size=TIFFGetFileSize(tif);
1255 if (sp->jpeg_interchange_format!=0)
1256 {
1257 if (sp->jpeg_interchange_format>=sp->file_size)
1258 {
1259 sp->jpeg_interchange_format=0;
1260 sp->jpeg_interchange_format_length=0;
1261 }
1262 else
1263 {
1264 if ((sp->jpeg_interchange_format_length==0) || (sp->jpeg_interchange_format+sp->jpeg_interchange_format_length>sp->file_size))
1265 sp->jpeg_interchange_format_length=sp->file_size-sp->jpeg_interchange_format;
1266 }
1267 }
1268 sp->in_buffer_source=osibsNotSetYet;
1269 sp->in_buffer_next_strile=0;
1270 sp->in_buffer_strile_count=tif->tif_dir.td_nstrips;
1271 sp->in_buffer_file_togo=0;
1272 sp->in_buffer_togo=0;
1273 do
1274 {
1275 if (OJPEGReadBytePeek(sp,&m)==0)
1276 return(0);
1277 if (m!=255)
1278 break;
1279 OJPEGReadByteAdvance(sp);
1280 do
1281 {
1282 if (OJPEGReadByte(sp,&m)==0)
1283 return(0);
1284 } while(m==255);
1285 switch(m)
1286 {
1287 case JPEG_MARKER_SOI:
1288 /* this type of marker has no data, and should be skipped */
1289 break;
1290 case JPEG_MARKER_COM:
1291 case JPEG_MARKER_APP0:
1292 case JPEG_MARKER_APP0+1:
1293 case JPEG_MARKER_APP0+2:
1294 case JPEG_MARKER_APP0+3:
1295 case JPEG_MARKER_APP0+4:
1296 case JPEG_MARKER_APP0+5:
1297 case JPEG_MARKER_APP0+6:
1298 case JPEG_MARKER_APP0+7:
1299 case JPEG_MARKER_APP0+8:
1300 case JPEG_MARKER_APP0+9:
1301 case JPEG_MARKER_APP0+10:
1302 case JPEG_MARKER_APP0+11:
1303 case JPEG_MARKER_APP0+12:
1304 case JPEG_MARKER_APP0+13:
1305 case JPEG_MARKER_APP0+14:
1306 case JPEG_MARKER_APP0+15:
1307 /* this type of marker has data, but it has no use to us (and no place here) and should be skipped */
1308 if (OJPEGReadWord(sp,&n)==0)
1309 return(0);
1310 if (n<2)
1311 {
1312 if (sp->subsamplingcorrect==0)
1313 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JPEG data");
1314 return(0);
1315 }
1316 if (n>2)
1317 OJPEGReadSkip(sp,n-2);
1318 break;
1319 case JPEG_MARKER_DRI:
1320 if (OJPEGReadHeaderInfoSecStreamDri(tif)==0)
1321 return(0);
1322 break;
1323 case JPEG_MARKER_DQT:
1324 if (OJPEGReadHeaderInfoSecStreamDqt(tif)==0)
1325 return(0);
1326 break;
1327 case JPEG_MARKER_DHT:
1328 if (OJPEGReadHeaderInfoSecStreamDht(tif)==0)
1329 return(0);
1330 break;
1331 case JPEG_MARKER_SOF0:
1332 case JPEG_MARKER_SOF1:
1333 case JPEG_MARKER_SOF3:
1334 if (OJPEGReadHeaderInfoSecStreamSof(tif,m)==0)
1335 return(0);
1336 if (sp->subsamplingcorrect!=0)
1337 return(1);
1338 break;
1339 case JPEG_MARKER_SOS:
1340 if (sp->subsamplingcorrect!=0)
1341 return(1);
1342 assert(sp->plane_sample_offset==0);
1343 if (OJPEGReadHeaderInfoSecStreamSos(tif)==0)
1344 return(0);
1345 break;
1346 default:
1347 TIFFErrorExt(tif->tif_clientdata,module,"Unknown marker type %d in JPEG data",m);
1348 return(0);
1349 }
1350 } while(m!=JPEG_MARKER_SOS);
1351 if (sp->subsamplingcorrect)
1352 return(1);
1353 if (sp->sof_log==0)
1354 {
1355 if (OJPEGReadHeaderInfoSecTablesQTable(tif)==0)
1356 return(0);
1357 sp->sof_marker_id=JPEG_MARKER_SOF0;
1358 for (o=0; o<sp->samples_per_pixel; o++)
1359 sp->sof_c[o]=o;
1360 sp->sof_hv[0]=((sp->subsampling_hor<<4)|sp->subsampling_ver);
1361 for (o=1; o<sp->samples_per_pixel; o++)
1362 sp->sof_hv[o]=17;
1363 sp->sof_x=sp->strile_width;
1364 sp->sof_y=sp->strile_length_total;
1365 sp->sof_log=1;
1366 if (OJPEGReadHeaderInfoSecTablesDcTable(tif)==0)
1367 return(0);
1368 if (OJPEGReadHeaderInfoSecTablesAcTable(tif)==0)
1369 return(0);
1370 for (o=1; o<sp->samples_per_pixel; o++)
1371 sp->sos_cs[o]=o;
1372 }
1373 return(1);
1374}
8414a40c
VZ		 1375
1376static int
80ed523f
VZ		 1377OJPEGReadHeaderInfoSecStreamDri(TIFF* tif)
1378{
1379 /* this could easilly cause trouble in some cases... but no such cases have occured sofar */
1380 static const char module[]="OJPEGReadHeaderInfoSecStreamDri";
1381 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1382 uint16 m;
1383 if (OJPEGReadWord(sp,&m)==0)
1384 return(0);
1385 if (m!=4)
1386 {
1387 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DRI marker in JPEG data");
1388 return(0);
1389 }
1390 if (OJPEGReadWord(sp,&m)==0)
1391 return(0);
1392 sp->restart_interval=m;
1393 return(1);
1394}
8414a40c
VZ		 1395
1396static int
80ed523f
VZ		 1397OJPEGReadHeaderInfoSecStreamDqt(TIFF* tif)
1398{
1399 /* this is a table marker, and it is to be saved as a whole for exact pushing on the jpeg stream later on */
1400 static const char module[]="OJPEGReadHeaderInfoSecStreamDqt";
1401 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1402 uint16 m;
1403 uint32 na;
1404 uint8* nb;
1405 uint8 o;
1406 if (OJPEGReadWord(sp,&m)==0)
1407 return(0);
1408 if (m<=2)
1409 {
1410 if (sp->subsamplingcorrect==0)
1411 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DQT marker in JPEG data");
1412 return(0);
1413 }
1414 if (sp->subsamplingcorrect!=0)
1415 OJPEGReadSkip(sp,m-2);
1416 else
1417 {
1418 m-=2;
1419 do
1420 {
1421 if (m<65)
1422 {
1423 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DQT marker in JPEG data");
1424 return(0);
1425 }
1426 na=sizeof(uint32)+69;
1427 nb=_TIFFmalloc(na);
1428 if (nb==0)
1429 {
1430 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
1431 return(0);
1432 }
1433 *(uint32*)nb=na;
1434 nb[sizeof(uint32)]=255;
1435 nb[sizeof(uint32)+1]=JPEG_MARKER_DQT;
1436 nb[sizeof(uint32)+2]=0;
1437 nb[sizeof(uint32)+3]=67;
1438 if (OJPEGReadBlock(sp,65,&nb[sizeof(uint32)+4])==0) {
1439 _TIFFfree(nb);
1440 return(0);
1441 }
1442 o=nb[sizeof(uint32)+4]&15;
1443 if (3<o)
1444 {
1445 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DQT marker in JPEG data");
1446 _TIFFfree(nb);
1447 return(0);
1448 }
1449 if (sp->qtable[o]!=0)
1450 _TIFFfree(sp->qtable[o]);
1451 sp->qtable[o]=nb;
1452 m-=65;
1453 } while(m>0);
1454 }
1455 return(1);
1456}
8414a40c
VZ		 1457
1458static int
80ed523f
VZ		 1459OJPEGReadHeaderInfoSecStreamDht(TIFF* tif)
1460{
1461 /* this is a table marker, and it is to be saved as a whole for exact pushing on the jpeg stream later on */
1462 /* TODO: the following assumes there is only one table in this marker... but i'm not quite sure that assumption is guaranteed correct */
1463 static const char module[]="OJPEGReadHeaderInfoSecStreamDht";
1464 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1465 uint16 m;
1466 uint32 na;
1467 uint8* nb;
1468 uint8 o;
1469 if (OJPEGReadWord(sp,&m)==0)
1470 return(0);
1471 if (m<=2)
1472 {
1473 if (sp->subsamplingcorrect==0)
1474 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
1475 return(0);
1476 }
1477 if (sp->subsamplingcorrect!=0)
1478 {
1479 OJPEGReadSkip(sp,m-2);
1480 }
1481 else
1482 {
1483 na=sizeof(uint32)+2+m;
1484 nb=_TIFFmalloc(na);
1485 if (nb==0)
1486 {
1487 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
1488 return(0);
1489 }
1490 *(uint32*)nb=na;
1491 nb[sizeof(uint32)]=255;
1492 nb[sizeof(uint32)+1]=JPEG_MARKER_DHT;
1493 nb[sizeof(uint32)+2]=(m>>8);
1494 nb[sizeof(uint32)+3]=(m&255);
1495 if (OJPEGReadBlock(sp,m-2,&nb[sizeof(uint32)+4])==0)
1496 return(0);
1497 o=nb[sizeof(uint32)+4];
1498 if ((o&240)==0)
1499 {
1500 if (3<o)
1501 {
1502 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
1503 return(0);
1504 }
1505 if (sp->dctable[o]!=0)
1506 _TIFFfree(sp->dctable[o]);
1507 sp->dctable[o]=nb;
1508 }
1509 else
1510 {
1511 if ((o&240)!=16)
1512 {
1513 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
1514 return(0);
1515 }
1516 o&=15;
1517 if (3<o)
1518 {
1519 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
1520 return(0);
1521 }
1522 if (sp->actable[o]!=0)
1523 _TIFFfree(sp->actable[o]);
1524 sp->actable[o]=nb;
1525 }
1526 }
1527 return(1);
1528}
8414a40c
VZ		 1529
1530static int
80ed523f
VZ		 1531OJPEGReadHeaderInfoSecStreamSof(TIFF* tif, uint8 marker_id)
1532{
1533 /* this marker needs to be checked, and part of its data needs to be saved for regeneration later on */
1534 static const char module[]="OJPEGReadHeaderInfoSecStreamSof";
1535 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1536 uint16 m;
1537 uint16 n;
1538 uint8 o;
1539 uint16 p;
1540 uint16 q;
1541 if (sp->sof_log!=0)
1542 {
1543 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JPEG data");
1544 return(0);
1545 }
1546 if (sp->subsamplingcorrect==0)
1547 sp->sof_marker_id=marker_id;
1548 /* Lf: data length */
1549 if (OJPEGReadWord(sp,&m)==0)
1550 return(0);
1551 if (m<11)
1552 {
1553 if (sp->subsamplingcorrect==0)
1554 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOF marker in JPEG data");
1555 return(0);
1556 }
1557 m-=8;
1558 if (m%3!=0)
1559 {
1560 if (sp->subsamplingcorrect==0)
1561 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOF marker in JPEG data");
1562 return(0);
1563 }
1564 n=m/3;
1565 if (sp->subsamplingcorrect==0)
1566 {
1567 if (n!=sp->samples_per_pixel)
1568 {
1569 TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected number of samples");
1570 return(0);
1571 }
1572 }
1573 /* P: Sample precision */
1574 if (OJPEGReadByte(sp,&o)==0)
1575 return(0);
1576 if (o!=8)
1577 {
1578 if (sp->subsamplingcorrect==0)
1579 TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected number of bits per sample");
1580 return(0);
1581 }
1582 /* Y: Number of lines, X: Number of samples per line */
1583 if (sp->subsamplingcorrect)
1584 OJPEGReadSkip(sp,4);
1585 else
1586 {
1587 /* Y: Number of lines */
1588 if (OJPEGReadWord(sp,&p)==0)
1589 return(0);
1590 if (((uint32)p<sp->image_length) && ((uint32)p<sp->strile_length_total))
1591 {
1592 TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected height");
1593 return(0);
1594 }
1595 sp->sof_y=p;
1596 /* X: Number of samples per line */
1597 if (OJPEGReadWord(sp,&p)==0)
1598 return(0);
1599 if (((uint32)p<sp->image_width) && ((uint32)p<sp->strile_width))
1600 {
1601 TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected width");
1602 return(0);
1603 }
1604 if ((uint32)p>sp->strile_width)
1605 {
1606 TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data image width exceeds expected image width");
1607 return(0);
1608 }
1609 sp->sof_x=p;
1610 }
1611 /* Nf: Number of image components in frame */
1612 if (OJPEGReadByte(sp,&o)==0)
1613 return(0);
1614 if (o!=n)
1615 {
1616 if (sp->subsamplingcorrect==0)
1617 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOF marker in JPEG data");
1618 return(0);
1619 }
1620 /* per component stuff */
1621 /* TODO: double-check that flow implies that n cannot be as big as to make us overflow sof_c, sof_hv and sof_tq arrays */
1622 for (q=0; q<n; q++)
1623 {
1624 /* C: Component identifier */
1625 if (OJPEGReadByte(sp,&o)==0)
1626 return(0);
1627 if (sp->subsamplingcorrect==0)
1628 sp->sof_c[q]=o;
1629 /* H: Horizontal sampling factor, and V: Vertical sampling factor */
1630 if (OJPEGReadByte(sp,&o)==0)
1631 return(0);
1632 if (sp->subsamplingcorrect!=0)
1633 {
1634 if (q==0)
1635 {
1636 sp->subsampling_hor=(o>>4);
1637 sp->subsampling_ver=(o&15);
1638 if (((sp->subsampling_hor!=1) && (sp->subsampling_hor!=2) && (sp->subsampling_hor!=4)) ||
1639 ((sp->subsampling_ver!=1) && (sp->subsampling_ver!=2) && (sp->subsampling_ver!=4)))
1640 sp->subsampling_force_desubsampling_inside_decompression=1;
1641 }
1642 else
1643 {
1644 if (o!=17)
1645 sp->subsampling_force_desubsampling_inside_decompression=1;
1646 }
1647 }
1648 else
1649 {
1650 sp->sof_hv[q]=o;
1651 if (sp->subsampling_force_desubsampling_inside_decompression==0)
1652 {
1653 if (q==0)
1654 {
1655 if (o!=((sp->subsampling_hor<<4)|sp->subsampling_ver))
1656 {
1657 TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected subsampling values");
1658 return(0);
1659 }
1660 }
1661 else
1662 {
1663 if (o!=17)
1664 {
1665 TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected subsampling values");
1666 return(0);
1667 }
1668 }
1669 }
1670 }
1671 /* Tq: Quantization table destination selector */
1672 if (OJPEGReadByte(sp,&o)==0)
1673 return(0);
1674 if (sp->subsamplingcorrect==0)
1675 sp->sof_tq[q]=o;
1676 }
1677 if (sp->subsamplingcorrect==0)
1678 sp->sof_log=1;
1679 return(1);
1680}
8414a40c 1681
80ed523f
VZ		 1682static int
1683OJPEGReadHeaderInfoSecStreamSos(TIFF* tif)
1684{
1685 /* this marker needs to be checked, and part of its data needs to be saved for regeneration later on */
1686 static const char module[]="OJPEGReadHeaderInfoSecStreamSos";
1687 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1688 uint16 m;
1689 uint8 n;
1690 uint8 o;
1691 assert(sp->subsamplingcorrect==0);
1692 if (sp->sof_log==0)
1693 {
1694 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOS marker in JPEG data");
1695 return(0);
1696 }
1697 /* Ls */
1698 if (OJPEGReadWord(sp,&m)==0)
1699 return(0);
1700 if (m!=6+sp->samples_per_pixel_per_plane*2)
1701 {
1702 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOS marker in JPEG data");
1703 return(0);
1704 }
1705 /* Ns */
1706 if (OJPEGReadByte(sp,&n)==0)
1707 return(0);
1708 if (n!=sp->samples_per_pixel_per_plane)
1709 {
1710 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOS marker in JPEG data");
1711 return(0);
1712 }
1713 /* Cs, Td, and Ta */
1714 for (o=0; o<sp->samples_per_pixel_per_plane; o++)
1715 {
1716 /* Cs */
1717 if (OJPEGReadByte(sp,&n)==0)
1718 return(0);
1719 sp->sos_cs[sp->plane_sample_offset+o]=n;
1720 /* Td and Ta */
1721 if (OJPEGReadByte(sp,&n)==0)
1722 return(0);
1723 sp->sos_tda[sp->plane_sample_offset+o]=n;
1724 }
1725 /* skip Ss, Se, Ah, en Al -> no check, as per Tom Lane recommendation, as per LibJpeg source */
1726 OJPEGReadSkip(sp,3);
1727 return(1);
1728}
8414a40c
VZ		 1729
1730static int
80ed523f
VZ		 1731OJPEGReadHeaderInfoSecTablesQTable(TIFF* tif)
1732{
1733 static const char module[]="OJPEGReadHeaderInfoSecTablesQTable";
1734 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1735 uint8 m;
1736 uint8 n;
1737 uint32 oa;
1738 uint8* ob;
1739 uint32 p;
1740 if (sp->qtable_offset[0]==0)
1741 {
1742 TIFFErrorExt(tif->tif_clientdata,module,"Missing JPEG tables");
1743 return(0);
1744 }
1745 sp->in_buffer_file_pos_log=0;
1746 for (m=0; m<sp->samples_per_pixel; m++)
1747 {
1748 if ((sp->qtable_offset[m]!=0) && ((m==0) || (sp->qtable_offset[m]!=sp->qtable_offset[m-1])))
1749 {
1750 for (n=0; n<m-1; n++)
1751 {
1752 if (sp->qtable_offset[m]==sp->qtable_offset[n])
1753 {
1754 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JpegQTables tag value");
1755 return(0);
1756 }
1757 }
1758 oa=sizeof(uint32)+69;
1759 ob=_TIFFmalloc(oa);
1760 if (ob==0)
1761 {
1762 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
1763 return(0);
1764 }
1765 *(uint32*)ob=oa;
1766 ob[sizeof(uint32)]=255;
1767 ob[sizeof(uint32)+1]=JPEG_MARKER_DQT;
1768 ob[sizeof(uint32)+2]=0;
1769 ob[sizeof(uint32)+3]=67;
1770 ob[sizeof(uint32)+4]=m;
1771 TIFFSeekFile(tif,sp->qtable_offset[m],SEEK_SET);
1772 p=TIFFReadFile(tif,&ob[sizeof(uint32)+5],64);
1773 if (p!=64)
1774 return(0);
1775 sp->qtable[m]=ob;
1776 sp->sof_tq[m]=m;
1777 }
1778 else
1779 sp->sof_tq[m]=sp->sof_tq[m-1];
1780 }
1781 return(1);
1782}
8414a40c
VZ		 1783
1784static int
80ed523f 1785OJPEGReadHeaderInfoSecTablesDcTable(TIFF* tif)
8414a40c 1786{
80ed523f
VZ		 1787 static const char module[]="OJPEGReadHeaderInfoSecTablesDcTable";
1788 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1789 uint8 m;
1790 uint8 n;
1791 uint8 o[16];
1792 uint32 p;
1793 uint32 q;
1794 uint32 ra;
1795 uint8* rb;
1796 if (sp->dctable_offset[0]==0)
1797 {
1798 TIFFErrorExt(tif->tif_clientdata,module,"Missing JPEG tables");
1799 return(0);
1800 }
1801 sp->in_buffer_file_pos_log=0;
1802 for (m=0; m<sp->samples_per_pixel; m++)
1803 {
1804 if ((sp->dctable_offset[m]!=0) && ((m==0) || (sp->dctable_offset[m]!=sp->dctable_offset[m-1])))
1805 {
1806 for (n=0; n<m-1; n++)
1807 {
1808 if (sp->dctable_offset[m]==sp->dctable_offset[n])
1809 {
1810 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JpegDcTables tag value");
1811 return(0);
1812 }
1813 }
1814 TIFFSeekFile(tif,sp->dctable_offset[m],SEEK_SET);
1815 p=TIFFReadFile(tif,o,16);
1816 if (p!=16)
1817 return(0);
1818 q=0;
1819 for (n=0; n<16; n++)
1820 q+=o[n];
1821 ra=sizeof(uint32)+21+q;
1822 rb=_TIFFmalloc(ra);
1823 if (rb==0)
1824 {
1825 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
1826 return(0);
1827 }
1828 *(uint32*)rb=ra;
1829 rb[sizeof(uint32)]=255;
1830 rb[sizeof(uint32)+1]=JPEG_MARKER_DHT;
1831 rb[sizeof(uint32)+2]=((19+q)>>8);
1832 rb[sizeof(uint32)+3]=((19+q)&255);
1833 rb[sizeof(uint32)+4]=m;
1834 for (n=0; n<16; n++)
1835 rb[sizeof(uint32)+5+n]=o[n];
1836 p=TIFFReadFile(tif,&(rb[sizeof(uint32)+21]),q);
1837 if (p!=q)
1838 return(0);
1839 sp->dctable[m]=rb;
1840 sp->sos_tda[m]=(m<<4);
8414a40c 1841 }
80ed523f
VZ		 1842 else
1843 sp->sos_tda[m]=sp->sos_tda[m-1];
1844 }
1845 return(1);
1846}
8414a40c
VZ		 1847
1848static int
80ed523f
VZ		 1849OJPEGReadHeaderInfoSecTablesAcTable(TIFF* tif)
1850{
1851 static const char module[]="OJPEGReadHeaderInfoSecTablesAcTable";
1852 OJPEGState* sp=(OJPEGState*)tif->tif_data;
1853 uint8 m;
1854 uint8 n;
1855 uint8 o[16];
1856 uint32 p;
1857 uint32 q;
1858 uint32 ra;
1859 uint8* rb;
1860 if (sp->actable_offset[0]==0)
1861 {
1862 TIFFErrorExt(tif->tif_clientdata,module,"Missing JPEG tables");
1863 return(0);
1864 }
1865 sp->in_buffer_file_pos_log=0;
1866 for (m=0; m<sp->samples_per_pixel; m++)
1867 {
1868 if ((sp->actable_offset[m]!=0) && ((m==0) || (sp->actable_offset[m]!=sp->actable_offset[m-1])))
1869 {
1870 for (n=0; n<m-1; n++)
1871 {
1872 if (sp->actable_offset[m]==sp->actable_offset[n])
1873 {
1874 TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JpegAcTables tag value");
1875 return(0);
1876 }
1877 }
1878 TIFFSeekFile(tif,sp->actable_offset[m],SEEK_SET);
1879 p=TIFFReadFile(tif,o,16);
1880 if (p!=16)
1881 return(0);
1882 q=0;
1883 for (n=0; n<16; n++)
1884 q+=o[n];
1885 ra=sizeof(uint32)+21+q;
1886 rb=_TIFFmalloc(ra);
1887 if (rb==0)
1888 {
1889 TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
1890 return(0);
1891 }
1892 *(uint32*)rb=ra;
1893 rb[sizeof(uint32)]=255;
1894 rb[sizeof(uint32)+1]=JPEG_MARKER_DHT;
1895 rb[sizeof(uint32)+2]=((19+q)>>8);
1896 rb[sizeof(uint32)+3]=((19+q)&255);
1897 rb[sizeof(uint32)+4]=(16|m);
1898 for (n=0; n<16; n++)
1899 rb[sizeof(uint32)+5+n]=o[n];
1900 p=TIFFReadFile(tif,&(rb[sizeof(uint32)+21]),q);
1901 if (p!=q)
1902 return(0);
1903 sp->actable[m]=rb;
1904 sp->sos_tda[m]=(sp->sos_tda[m]|m);
1905 }
1906 else
1907 sp->sos_tda[m]=(sp->sos_tda[m]|(sp->sos_tda[m-1]&15));
1908 }
1909 return(1);
1910}
1911
1912static int
1913OJPEGReadBufferFill(OJPEGState* sp)
1914{
1915 uint16 m;
1916 tmsize_t n;
1917 /* TODO: double-check: when subsamplingcorrect is set, no call to TIFFErrorExt or TIFFWarningExt should be made
1918 * in any other case, seek or read errors should be passed through */
1919 do
1920 {
1921 if (sp->in_buffer_file_togo!=0)
1922 {
1923 if (sp->in_buffer_file_pos_log==0)
1924 {
1925 TIFFSeekFile(sp->tif,sp->in_buffer_file_pos,SEEK_SET);
1926 sp->in_buffer_file_pos_log=1;
1927 }
1928 m=OJPEG_BUFFER;
1929 if ((uint64)m>sp->in_buffer_file_togo)
1930 m=(uint16)sp->in_buffer_file_togo;
1931 n=TIFFReadFile(sp->tif,sp->in_buffer,(tmsize_t)m);
1932 if (n==0)
1933 return(0);
1934 assert(n>0);
1935 assert(n<=OJPEG_BUFFER);
1936 assert(n<65536);
1937 assert((uint64)n<=sp->in_buffer_file_togo);
1938 m=(uint16)n;
1939 sp->in_buffer_togo=m;
1940 sp->in_buffer_cur=sp->in_buffer;
1941 sp->in_buffer_file_togo-=m;
1942 sp->in_buffer_file_pos+=m;
1943 break;
1944 }
1945 sp->in_buffer_file_pos_log=0;
1946 switch(sp->in_buffer_source)
1947 {
1948 case osibsNotSetYet:
1949 if (sp->jpeg_interchange_format!=0)
1950 {
1951 sp->in_buffer_file_pos=sp->jpeg_interchange_format;
1952 sp->in_buffer_file_togo=sp->jpeg_interchange_format_length;
1953 }
1954 sp->in_buffer_source=osibsJpegInterchangeFormat;
1955 break;
1956 case osibsJpegInterchangeFormat:
1957 sp->in_buffer_source=osibsStrile;
1958 case osibsStrile:
1959 if (!_TIFFFillStriles( sp->tif )
1960 || sp->tif->tif_dir.td_stripoffset == NULL
1961 || sp->tif->tif_dir.td_stripbytecount == NULL)
1962 return 0;
1963
1964 if (sp->in_buffer_next_strile==sp->in_buffer_strile_count)
1965 sp->in_buffer_source=osibsEof;
1966 else
1967 {
1968 sp->in_buffer_file_pos=sp->tif->tif_dir.td_stripoffset[sp->in_buffer_next_strile];
1969 if (sp->in_buffer_file_pos!=0)
1970 {
1971 if (sp->in_buffer_file_pos>=sp->file_size)
1972 sp->in_buffer_file_pos=0;
1973 else if (sp->tif->tif_dir.td_stripbytecount==NULL)
1974 sp->in_buffer_file_togo=sp->file_size-sp->in_buffer_file_pos;
1975 else
1976 {
1977 if (sp->tif->tif_dir.td_stripbytecount == 0) {
1978 TIFFErrorExt(sp->tif->tif_clientdata,sp->tif->tif_name,"Strip byte counts are missing");
1979 return(0);
1980 }
1981 sp->in_buffer_file_togo=sp->tif->tif_dir.td_stripbytecount[sp->in_buffer_next_strile];
1982 if (sp->in_buffer_file_togo==0)
1983 sp->in_buffer_file_pos=0;
1984 else if (sp->in_buffer_file_pos+sp->in_buffer_file_togo>sp->file_size)
1985 sp->in_buffer_file_togo=sp->file_size-sp->in_buffer_file_pos;
1986 }
1987 }
1988 sp->in_buffer_next_strile++;
1989 }
1990 break;
1991 default:
1992 return(0);
1993 }
1994 } while (1);
1995 return(1);
1996}
1997
1998static int
1999OJPEGReadByte(OJPEGState* sp, uint8* byte)
2000{
2001 if (sp->in_buffer_togo==0)
2002 {
2003 if (OJPEGReadBufferFill(sp)==0)
2004 return(0);
2005 assert(sp->in_buffer_togo>0);
2006 }
2007 *byte=*(sp->in_buffer_cur);
2008 sp->in_buffer_cur++;
2009 sp->in_buffer_togo--;
2010 return(1);
2011}
2012
2013static int
2014OJPEGReadBytePeek(OJPEGState* sp, uint8* byte)
2015{
2016 if (sp->in_buffer_togo==0)
2017 {
2018 if (OJPEGReadBufferFill(sp)==0)
2019 return(0);
2020 assert(sp->in_buffer_togo>0);
2021 }
2022 *byte=*(sp->in_buffer_cur);
2023 return(1);
2024}
8414a40c
VZ		 2025
2026static void
80ed523f
VZ		 2027OJPEGReadByteAdvance(OJPEGState* sp)
2028{
2029 assert(sp->in_buffer_togo>0);
2030 sp->in_buffer_cur++;
2031 sp->in_buffer_togo--;
2032}
2033
2034static int
2035OJPEGReadWord(OJPEGState* sp, uint16* word)
2036{
2037 uint8 m;
2038 if (OJPEGReadByte(sp,&m)==0)
2039 return(0);
2040 *word=(m<<8);
2041 if (OJPEGReadByte(sp,&m)==0)
2042 return(0);
2043 *word|=m;
2044 return(1);
2045}
2046
2047static int
2048OJPEGReadBlock(OJPEGState* sp, uint16 len, void* mem)
2049{
2050 uint16 mlen;
2051 uint8* mmem;
2052 uint16 n;
2053 assert(len>0);
2054 mlen=len;
2055 mmem=mem;
2056 do
2057 {
2058 if (sp->in_buffer_togo==0)
2059 {
2060 if (OJPEGReadBufferFill(sp)==0)
2061 return(0);
2062 assert(sp->in_buffer_togo>0);
2063 }
2064 n=mlen;
2065 if (n>sp->in_buffer_togo)
2066 n=sp->in_buffer_togo;
2067 _TIFFmemcpy(mmem,sp->in_buffer_cur,n);
2068 sp->in_buffer_cur+=n;
2069 sp->in_buffer_togo-=n;
2070 mlen-=n;
2071 mmem+=n;
2072 } while(mlen>0);
2073 return(1);
2074}
8414a40c
VZ		 2075
2076static void
80ed523f
VZ		 2077OJPEGReadSkip(OJPEGState* sp, uint16 len)
2078{
2079 uint16 m;
2080 uint16 n;
2081 m=len;
2082 n=m;
2083 if (n>sp->in_buffer_togo)
2084 n=sp->in_buffer_togo;
2085 sp->in_buffer_cur+=n;
2086 sp->in_buffer_togo-=n;
2087 m-=n;
2088 if (m>0)
2089 {
2090 assert(sp->in_buffer_togo==0);
2091 n=m;
2092 if ((uint64)n>sp->in_buffer_file_togo)
2093 n=(uint16)sp->in_buffer_file_togo;
2094 sp->in_buffer_file_pos+=n;
2095 sp->in_buffer_file_togo-=n;
2096 sp->in_buffer_file_pos_log=0;
2097 /* we don't skip past jpeginterchangeformat/strile block...
2098 * if that is asked from us, we're dealing with totally bazurk
2099 * data anyway, and we've not seen this happening on any
2100 * testfile, so we might as well likely cause some other
2101 * meaningless error to be passed at some later time
2102 */
2103 }
2104}
2105
2106static int
2107OJPEGWriteStream(TIFF* tif, void** mem, uint32* len)
2108{
2109 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2110 *len=0;
2111 do
2112 {
2113 assert(sp->out_state<=ososEoi);
2114 switch(sp->out_state)
2115 {
2116 case ososSoi:
2117 OJPEGWriteStreamSoi(tif,mem,len);
2118 break;
2119 case ososQTable0:
2120 OJPEGWriteStreamQTable(tif,0,mem,len);
2121 break;
2122 case ososQTable1:
2123 OJPEGWriteStreamQTable(tif,1,mem,len);
2124 break;
2125 case ososQTable2:
2126 OJPEGWriteStreamQTable(tif,2,mem,len);
2127 break;
2128 case ososQTable3:
2129 OJPEGWriteStreamQTable(tif,3,mem,len);
2130 break;
2131 case ososDcTable0:
2132 OJPEGWriteStreamDcTable(tif,0,mem,len);
2133 break;
2134 case ososDcTable1:
2135 OJPEGWriteStreamDcTable(tif,1,mem,len);
2136 break;
2137 case ososDcTable2:
2138 OJPEGWriteStreamDcTable(tif,2,mem,len);
2139 break;
2140 case ososDcTable3:
2141 OJPEGWriteStreamDcTable(tif,3,mem,len);
2142 break;
2143 case ososAcTable0:
2144 OJPEGWriteStreamAcTable(tif,0,mem,len);
2145 break;
2146 case ososAcTable1:
2147 OJPEGWriteStreamAcTable(tif,1,mem,len);
2148 break;
2149 case ososAcTable2:
2150 OJPEGWriteStreamAcTable(tif,2,mem,len);
2151 break;
2152 case ososAcTable3:
2153 OJPEGWriteStreamAcTable(tif,3,mem,len);
2154 break;
2155 case ososDri:
2156 OJPEGWriteStreamDri(tif,mem,len);
2157 break;
2158 case ososSof:
2159 OJPEGWriteStreamSof(tif,mem,len);
2160 break;
2161 case ososSos:
2162 OJPEGWriteStreamSos(tif,mem,len);
2163 break;
2164 case ososCompressed:
2165 if (OJPEGWriteStreamCompressed(tif,mem,len)==0)
2166 return(0);
2167 break;
2168 case ososRst:
2169 OJPEGWriteStreamRst(tif,mem,len);
2170 break;
2171 case ososEoi:
2172 OJPEGWriteStreamEoi(tif,mem,len);
2173 break;
2174 }
2175 } while (*len==0);
2176 return(1);
2177}
8414a40c
VZ		 2178
2179static void
80ed523f
VZ		 2180OJPEGWriteStreamSoi(TIFF* tif, void** mem, uint32* len)
2181{
2182 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2183 assert(OJPEG_BUFFER>=2);
2184 sp->out_buffer[0]=255;
2185 sp->out_buffer[1]=JPEG_MARKER_SOI;
2186 *len=2;
2187 *mem=(void*)sp->out_buffer;
2188 sp->out_state++;
2189}
2190
2191static void
2192OJPEGWriteStreamQTable(TIFF* tif, uint8 table_index, void** mem, uint32* len)
2193{
2194 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2195 if (sp->qtable[table_index]!=0)
2196 {
2197 *mem=(void*)(sp->qtable[table_index]+sizeof(uint32));
2198 *len=*((uint32*)sp->qtable[table_index])-sizeof(uint32);
2199 }
2200 sp->out_state++;
2201}
2202
2203static void
2204OJPEGWriteStreamDcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len)
2205{
2206 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2207 if (sp->dctable[table_index]!=0)
2208 {
2209 *mem=(void*)(sp->dctable[table_index]+sizeof(uint32));
2210 *len=*((uint32*)sp->dctable[table_index])-sizeof(uint32);
2211 }
2212 sp->out_state++;
2213}
2214
2215static void
2216OJPEGWriteStreamAcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len)
2217{
2218 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2219 if (sp->actable[table_index]!=0)
2220 {
2221 *mem=(void*)(sp->actable[table_index]+sizeof(uint32));
2222 *len=*((uint32*)sp->actable[table_index])-sizeof(uint32);
2223 }
2224 sp->out_state++;
2225}
2226
2227static void
2228OJPEGWriteStreamDri(TIFF* tif, void** mem, uint32* len)
2229{
2230 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2231 assert(OJPEG_BUFFER>=6);
2232 if (sp->restart_interval!=0)
2233 {
2234 sp->out_buffer[0]=255;
2235 sp->out_buffer[1]=JPEG_MARKER_DRI;
2236 sp->out_buffer[2]=0;
2237 sp->out_buffer[3]=4;
2238 sp->out_buffer[4]=(sp->restart_interval>>8);
2239 sp->out_buffer[5]=(sp->restart_interval&255);
2240 *len=6;
2241 *mem=(void*)sp->out_buffer;
2242 }
2243 sp->out_state++;
2244}
2245
2246static void
2247OJPEGWriteStreamSof(TIFF* tif, void** mem, uint32* len)
2248{
2249 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2250 uint8 m;
2251 assert(OJPEG_BUFFER>=2+8+sp->samples_per_pixel_per_plane*3);
2252 assert(255>=8+sp->samples_per_pixel_per_plane*3);
2253 sp->out_buffer[0]=255;
2254 sp->out_buffer[1]=sp->sof_marker_id;
2255 /* Lf */
2256 sp->out_buffer[2]=0;
2257 sp->out_buffer[3]=8+sp->samples_per_pixel_per_plane*3;
2258 /* P */
2259 sp->out_buffer[4]=8;
2260 /* Y */
2261 sp->out_buffer[5]=(sp->sof_y>>8);
2262 sp->out_buffer[6]=(sp->sof_y&255);
2263 /* X */
2264 sp->out_buffer[7]=(sp->sof_x>>8);
2265 sp->out_buffer[8]=(sp->sof_x&255);
2266 /* Nf */
2267 sp->out_buffer[9]=sp->samples_per_pixel_per_plane;
2268 for (m=0; m<sp->samples_per_pixel_per_plane; m++)
2269 {
2270 /* C */
2271 sp->out_buffer[10+m*3]=sp->sof_c[sp->plane_sample_offset+m];
2272 /* H and V */
2273 sp->out_buffer[10+m*3+1]=sp->sof_hv[sp->plane_sample_offset+m];
2274 /* Tq */
2275 sp->out_buffer[10+m*3+2]=sp->sof_tq[sp->plane_sample_offset+m];
2276 }
2277 *len=10+sp->samples_per_pixel_per_plane*3;
2278 *mem=(void*)sp->out_buffer;
2279 sp->out_state++;
2280}
2281
2282static void
2283OJPEGWriteStreamSos(TIFF* tif, void** mem, uint32* len)
2284{
2285 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2286 uint8 m;
2287 assert(OJPEG_BUFFER>=2+6+sp->samples_per_pixel_per_plane*2);
2288 assert(255>=6+sp->samples_per_pixel_per_plane*2);
2289 sp->out_buffer[0]=255;
2290 sp->out_buffer[1]=JPEG_MARKER_SOS;
2291 /* Ls */
2292 sp->out_buffer[2]=0;
2293 sp->out_buffer[3]=6+sp->samples_per_pixel_per_plane*2;
2294 /* Ns */
2295 sp->out_buffer[4]=sp->samples_per_pixel_per_plane;
2296 for (m=0; m<sp->samples_per_pixel_per_plane; m++)
2297 {
2298 /* Cs */
2299 sp->out_buffer[5+m*2]=sp->sos_cs[sp->plane_sample_offset+m];
2300 /* Td and Ta */
2301 sp->out_buffer[5+m*2+1]=sp->sos_tda[sp->plane_sample_offset+m];
2302 }
2303 /* Ss */
2304 sp->out_buffer[5+sp->samples_per_pixel_per_plane*2]=0;
2305 /* Se */
2306 sp->out_buffer[5+sp->samples_per_pixel_per_plane*2+1]=63;
2307 /* Ah and Al */
2308 sp->out_buffer[5+sp->samples_per_pixel_per_plane*2+2]=0;
2309 *len=8+sp->samples_per_pixel_per_plane*2;
2310 *mem=(void*)sp->out_buffer;
2311 sp->out_state++;
2312}
2313
2314static int
2315OJPEGWriteStreamCompressed(TIFF* tif, void** mem, uint32* len)
2316{
2317 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2318 if (sp->in_buffer_togo==0)
2319 {
2320 if (OJPEGReadBufferFill(sp)==0)
2321 return(0);
2322 assert(sp->in_buffer_togo>0);
2323 }
2324 *len=sp->in_buffer_togo;
2325 *mem=(void*)sp->in_buffer_cur;
2326 sp->in_buffer_togo=0;
2327 if (sp->in_buffer_file_togo==0)
2328 {
2329 switch(sp->in_buffer_source)
2330 {
2331 case osibsStrile:
2332 if (sp->in_buffer_next_strile<sp->in_buffer_strile_count)
2333 sp->out_state=ososRst;
2334 else
2335 sp->out_state=ososEoi;
2336 break;
2337 case osibsEof:
2338 sp->out_state=ososEoi;
2339 break;
2340 default:
2341 break;
2342 }
2343 }
2344 return(1);
2345}
2346
2347static void
2348OJPEGWriteStreamRst(TIFF* tif, void** mem, uint32* len)
2349{
2350 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2351 assert(OJPEG_BUFFER>=2);
2352 sp->out_buffer[0]=255;
2353 sp->out_buffer[1]=JPEG_MARKER_RST0+sp->restart_index;
2354 sp->restart_index++;
2355 if (sp->restart_index==8)
2356 sp->restart_index=0;
2357 *len=2;
2358 *mem=(void*)sp->out_buffer;
2359 sp->out_state=ososCompressed;
2360}
2361
2362static void
2363OJPEGWriteStreamEoi(TIFF* tif, void** mem, uint32* len)
2364{
2365 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2366 assert(OJPEG_BUFFER>=2);
2367 sp->out_buffer[0]=255;
2368 sp->out_buffer[1]=JPEG_MARKER_EOI;
2369 *len=2;
2370 *mem=(void*)sp->out_buffer;
2371}
2372
2373#ifndef LIBJPEG_ENCAP_EXTERNAL
2374static int
2375jpeg_create_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo)
2376{
2377 return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_create_decompress(cinfo),1));
2378}
2379#endif
2380
2381#ifndef LIBJPEG_ENCAP_EXTERNAL
2382static int
2383jpeg_read_header_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, uint8 require_image)
2384{
2385 return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_read_header(cinfo,require_image),1));
2386}
2387#endif
2388
2389#ifndef LIBJPEG_ENCAP_EXTERNAL
2390static int
2391jpeg_start_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo)
2392{
2393 return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_start_decompress(cinfo),1));
2394}
2395#endif
2396
2397#ifndef LIBJPEG_ENCAP_EXTERNAL
2398static int
2399jpeg_read_scanlines_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* scanlines, uint32 max_lines)
2400{
2401 return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_read_scanlines(cinfo,scanlines,max_lines),1));
2402}
2403#endif
2404
2405#ifndef LIBJPEG_ENCAP_EXTERNAL
2406static int
2407jpeg_read_raw_data_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* data, uint32 max_lines)
2408{
2409 return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_read_raw_data(cinfo,data,max_lines),1));
2410}
2411#endif
2412
2413#ifndef LIBJPEG_ENCAP_EXTERNAL
2414static void
2415jpeg_encap_unwind(TIFF* tif)
2416{
2417 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2418 LONGJMP(sp->exit_jmpbuf,1);
2419}
2420#endif
2421
2422static void
2423OJPEGLibjpegJpegErrorMgrOutputMessage(jpeg_common_struct* cinfo)
2424{
2425 char buffer[JMSG_LENGTH_MAX];
2426 (*cinfo->err->format_message)(cinfo,buffer);
2427 TIFFWarningExt(((TIFF*)(cinfo->client_data))->tif_clientdata,"LibJpeg","%s",buffer);
2428}
2429
2430static void
2431OJPEGLibjpegJpegErrorMgrErrorExit(jpeg_common_struct* cinfo)
2432{
2433 char buffer[JMSG_LENGTH_MAX];
2434 (*cinfo->err->format_message)(cinfo,buffer);
2435 TIFFErrorExt(((TIFF*)(cinfo->client_data))->tif_clientdata,"LibJpeg","%s",buffer);
2436 jpeg_encap_unwind((TIFF*)(cinfo->client_data));
2437}
2438
2439static void
2440OJPEGLibjpegJpegSourceMgrInitSource(jpeg_decompress_struct* cinfo)
2441{
2442 (void)cinfo;
2443}
2444
2445static boolean
2446OJPEGLibjpegJpegSourceMgrFillInputBuffer(jpeg_decompress_struct* cinfo)
2447{
2448 TIFF* tif=(TIFF*)cinfo->client_data;
2449 OJPEGState* sp=(OJPEGState*)tif->tif_data;
2450 void* mem=0;
2451 uint32 len=0U;
2452 if (OJPEGWriteStream(tif,&mem,&len)==0)
2453 {
2454 TIFFErrorExt(tif->tif_clientdata,"LibJpeg","Premature end of JPEG data");
2455 jpeg_encap_unwind(tif);
2456 }
2457 sp->libjpeg_jpeg_source_mgr.bytes_in_buffer=len;
2458 sp->libjpeg_jpeg_source_mgr.next_input_byte=mem;
2459 return(1);
2460}
2461
2462static void
2463OJPEGLibjpegJpegSourceMgrSkipInputData(jpeg_decompress_struct* cinfo, long num_bytes)
2464{
2465 TIFF* tif=(TIFF*)cinfo->client_data;
2466 (void)num_bytes;
2467 TIFFErrorExt(tif->tif_clientdata,"LibJpeg","Unexpected error");
2468 jpeg_encap_unwind(tif);
2469}
2470
2471static boolean
2472OJPEGLibjpegJpegSourceMgrResyncToRestart(jpeg_decompress_struct* cinfo, int desired)
2473{
2474 TIFF* tif=(TIFF*)cinfo->client_data;
2475 (void)desired;
2476 TIFFErrorExt(tif->tif_clientdata,"LibJpeg","Unexpected error");
2477 jpeg_encap_unwind(tif);
2478 return(0);
2479}
2480
2481static void
2482OJPEGLibjpegJpegSourceMgrTermSource(jpeg_decompress_struct* cinfo)
2483{
2484 (void)cinfo;
2485}
2486
2487#endif
8414a40c 2488
8414a40c 2489
80ed523f
VZ		 2490/*
2491 * Local Variables:
2492 * mode: c
2493 * c-basic-offset: 8
2494 * fill-column: 78
2495 * End:
8414a40c 2496 */
wxWidgets (Impactor)