Imported Upstream version 1.8.0upstream/1.8.0

1 files changed, 0 insertions, 2438 deletions

diff --git a/tiff/libtiff/tif_ojpeg.c b/tiff/libtiff/tif_ojpeg.c
deleted file mode 100644
index 9ae856c..0000000
--- a/tiff/libtiff/tif_ojpeg.c
+++ /dev/null
@@ -1,2438 +0,0 @@
-/* $Id: tif_ojpeg.c,v 1.24.2.6 2010-06-08 23:29:51 bfriesen Exp $ */
-
-/* WARNING: The type of JPEG encapsulation defined by the TIFF Version 6.0
-   specification is now totally obsolete and deprecated for new applications and
-   images. This file was was created solely in order to read unconverted images
-   still present on some users' computer systems. It will never be extended
-   to write such files. Writing new-style JPEG compressed TIFFs is implemented
-   in tif_jpeg.c.
-
-   The code is carefully crafted to robustly read all gathered JPEG-in-TIFF
-   testfiles, and anticipate as much as possible all other... But still, it may
-   fail on some. If you encounter problems, please report them on the TIFF
-   mailing list and/or to Joris Van Damme <info@awaresystems.be>.
-
-   Please read the file called "TIFF Technical Note #2" if you need to be
-   convinced this compression scheme is bad and breaks TIFF. That document
-   is linked to from the LibTiff site <http://www.remotesensing.org/libtiff/>
-   and from AWare Systems' TIFF section
-   <http://www.awaresystems.be/imaging/tiff.html>. It is also absorbed
-   in Adobe's specification supplements, marked "draft" up to this day, but
-   supported by the TIFF community.
-
-   This file interfaces with Release 6B of the JPEG Library written by the
-   Independent JPEG Group. Previous versions of this file required a hack inside
-   the LibJpeg library. This version no longer requires that. Remember to
-   remove the hack if you update from the old version.
-
-   Copyright (c) Joris Van Damme <info@awaresystems.be>
-   Copyright (c) AWare Systems <http://www.awaresystems.be/>
-
-   The licence agreement for this file is the same as the rest of the LibTiff
-   library.
-
-   IN NO EVENT SHALL JORIS VAN DAMME OR AWARE SYSTEMS BE LIABLE FOR
-   ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
-   OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-   WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
-   LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
-   OF THIS SOFTWARE.
-
-   Joris Van Damme and/or AWare Systems may be available for custom
-   developement. If you like what you see, and need anything similar or related,
-   contact <info@awaresystems.be>.
-*/
-
-/* What is what, and what is not?
-
-   This decoder starts with an input stream, that is essentially the JpegInterchangeFormat
-   stream, if any, followed by the strile data, if any. This stream is read in
-   OJPEGReadByte and related functions.
-
-   It analyzes the start of this stream, until it encounters non-marker data, i.e.
-   compressed image data. Some of the header markers it sees have no actual content,
-   like the SOI marker, and APP/COM markers that really shouldn't even be there. Some
-   other markers do have content, and the valuable bits and pieces of information
-   in these markers are saved, checking all to verify that the stream is more or
-   less within expected bounds. This happens inside the OJPEGReadHeaderInfoSecStreamXxx
-   functions.
-
-   Some OJPEG imagery contains no valid JPEG header markers. This situation is picked
-   up on if we've seen no SOF marker when we're at the start of the compressed image
-   data. In this case, the tables are read from JpegXxxTables tags, and the other
-   bits and pieces of information is initialized to its most basic value. This is
-   implemented in the OJPEGReadHeaderInfoSecTablesXxx functions.
-
-   When this is complete, a good and valid JPEG header can be assembled, and this is
-   passed through to LibJpeg. When that's done, the remainder of the input stream, i.e.
-   the compressed image data, can be passed through unchanged. This is done in
-   OJPEGWriteStream functions.
-
-   LibTiff rightly expects to know the subsampling values before decompression. Just like
-   in new-style JPEG-in-TIFF, though, or even more so, actually, the YCbCrsubsampling
-   tag is notoriously unreliable. To correct these tag values with the ones inside
-   the JPEG stream, the first part of the input stream is pre-scanned in
-   OJPEGSubsamplingCorrect, making no note of any other data, reporting no warnings
-   or errors, up to the point where either these values are read, or it's clear they
-   aren't there. This means that some of the data is read twice, but we feel speed
-   in correcting these values is important enough to warrant this sacrifice. Allthough
-   there is currently no define or other configuration mechanism to disable this behaviour,
-   the actual header scanning is build to robustly respond with error report if it
-   should encounter an uncorrected mismatch of subsampling values. See
-   OJPEGReadHeaderInfoSecStreamSof.
-
-   The restart interval and restart markers are the most tricky part... The restart
-   interval can be specified in a tag. It can also be set inside the input JPEG stream.
-   It can be used inside the input JPEG stream. If reading from strile data, we've
-   consistenly discovered the need to insert restart markers in between the different
-   striles, as is also probably the most likely interpretation of the original TIFF 6.0
-   specification. With all this setting of interval, and actual use of markers that is not
-   predictable at the time of valid JPEG header assembly, the restart thing may turn
-   out the Achilles heel of this implementation. Fortunately, most OJPEG writer vendors
-   succeed in reading back what they write, which may be the reason why we've been able
-   to discover ways that seem to work.
-
-   Some special provision is made for planarconfig separate OJPEG files. These seem
-   to consistently contain header info, a SOS marker, a plane, SOS marker, plane, SOS,
-   and plane. This may or may not be a valid JPEG configuration, we don't know and don't
-   care. We want LibTiff to be able to access the planes individually, without huge
-   buffering inside LibJpeg, anyway. So we compose headers to feed to LibJpeg, in this
-   case, that allow us to pass a single plane such that LibJpeg sees a valid
-   single-channel JPEG stream. Locating subsequent SOS markers, and thus subsequent
-   planes, is done inside OJPEGReadSecondarySos.
-
-   The benefit of the scheme is... that it works, basically. We know of no other that
-   does. It works without checking software tag, or otherwise going about things in an
-   OJPEG flavor specific manner. Instead, it is a single scheme, that covers the cases
-   with and without JpegInterchangeFormat, with and without striles, with part of
-   the header in JpegInterchangeFormat and remainder in first strile, etc. It is forgiving
-   and robust, may likely work with OJPEG flavors we've not seen yet, and makes most out
-   of the data.
-
-   Another nice side-effect is that a complete JPEG single valid stream is build if
-   planarconfig is not separate (vast majority). We may one day use that to build
-   converters to JPEG, and/or to new-style JPEG compression inside TIFF.
-
-   A dissadvantage is the lack of random access to the individual striles. This is the
-   reason for much of the complicated restart-and-position stuff inside OJPEGPreDecode.
-   Applications would do well accessing all striles in order, as this will result in
-   a single sequential scan of the input stream, and no restarting of LibJpeg decoding
-   session.
-*/
-
-
-#include "tiffiop.h"
-#ifdef OJPEG_SUPPORT
-
-/* Configuration defines here are:
- * JPEG_ENCAP_EXTERNAL: The normal way to call libjpeg, uses longjump. In some environments,
- * 	like eg LibTiffDelphi, this is not possible. For this reason, the actual calls to
- * 	libjpeg, with longjump stuff, are encapsulated in dedicated functions. When
- * 	JPEG_ENCAP_EXTERNAL is defined, these encapsulating functions are declared external
- * 	to this unit, and can be defined elsewhere to use stuff other then longjump.
- * 	The default mode, without JPEG_ENCAP_EXTERNAL, implements the call encapsulators
- * 	here, internally, with normal longjump.
- * SETJMP, LONGJMP, JMP_BUF: On some machines/environments a longjump equivalent is
- * 	conviniently available, but still it may be worthwhile to use _setjmp or sigsetjmp
- * 	in place of plain setjmp. These macros will make it easier. It is useless
- * 	to fiddle with these if you define JPEG_ENCAP_EXTERNAL.
- * OJPEG_BUFFER: Define the size of the desired buffer here. Should be small enough so as to guarantee
- * 	instant processing, optimal streaming and optimal use of processor cache, but also big
- * 	enough so as to not result in significant call overhead. It should be at least a few
- * 	bytes to accomodate some structures (this is verified in asserts), but it would not be
- * 	sensible to make it this small anyway, and it should be at most 64K since it is indexed
- * 	with uint16. We recommend 2K.
- * EGYPTIANWALK: You could also define EGYPTIANWALK here, but it is not used anywhere and has
- * 	absolutely no effect. That is why most people insist the EGYPTIANWALK is a bit silly.
- */
-
-/* #define LIBJPEG_ENCAP_EXTERNAL */
-#define SETJMP(jbuf) setjmp(jbuf)
-#define LONGJMP(jbuf,code) longjmp(jbuf,code)
-#define JMP_BUF jmp_buf
-#define OJPEG_BUFFER 2048
-/* define EGYPTIANWALK */
-
-#define JPEG_MARKER_SOF0 0xC0
-#define JPEG_MARKER_SOF1 0xC1
-#define JPEG_MARKER_SOF3 0xC3
-#define JPEG_MARKER_DHT 0xC4
-#define JPEG_MARKER_RST0 0XD0
-#define JPEG_MARKER_SOI 0xD8
-#define JPEG_MARKER_EOI 0xD9
-#define JPEG_MARKER_SOS 0xDA
-#define JPEG_MARKER_DQT 0xDB
-#define JPEG_MARKER_DRI 0xDD
-#define JPEG_MARKER_APP0 0xE0
-#define JPEG_MARKER_COM 0xFE
-
-#define FIELD_OJPEG_JPEGINTERCHANGEFORMAT (FIELD_CODEC+0)
-#define FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH (FIELD_CODEC+1)
-#define FIELD_OJPEG_JPEGQTABLES (FIELD_CODEC+2)
-#define FIELD_OJPEG_JPEGDCTABLES (FIELD_CODEC+3)
-#define FIELD_OJPEG_JPEGACTABLES (FIELD_CODEC+4)
-#define FIELD_OJPEG_JPEGPROC (FIELD_CODEC+5)
-#define FIELD_OJPEG_JPEGRESTARTINTERVAL (FIELD_CODEC+6)
-#define FIELD_OJPEG_COUNT 7
-
-static const TIFFFieldInfo ojpeg_field_info[] = {
-	{TIFFTAG_JPEGIFOFFSET,1,1,TIFF_LONG,FIELD_OJPEG_JPEGINTERCHANGEFORMAT,TRUE,FALSE,"JpegInterchangeFormat"},
-	{TIFFTAG_JPEGIFBYTECOUNT,1,1,TIFF_LONG,FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH,TRUE,FALSE,"JpegInterchangeFormatLength"},
-	{TIFFTAG_JPEGQTABLES,TIFF_VARIABLE,TIFF_VARIABLE,TIFF_LONG,FIELD_OJPEG_JPEGQTABLES,FALSE,TRUE,"JpegQTables"},
-	{TIFFTAG_JPEGDCTABLES,TIFF_VARIABLE,TIFF_VARIABLE,TIFF_LONG,FIELD_OJPEG_JPEGDCTABLES,FALSE,TRUE,"JpegDcTables"},
-	{TIFFTAG_JPEGACTABLES,TIFF_VARIABLE,TIFF_VARIABLE,TIFF_LONG,FIELD_OJPEG_JPEGACTABLES,FALSE,TRUE,"JpegAcTables"},
-	{TIFFTAG_JPEGPROC,1,1,TIFF_SHORT,FIELD_OJPEG_JPEGPROC,FALSE,FALSE,"JpegProc"},
-	{TIFFTAG_JPEGRESTARTINTERVAL,1,1,TIFF_SHORT,FIELD_OJPEG_JPEGRESTARTINTERVAL,FALSE,FALSE,"JpegRestartInterval"},
-};
-
-#ifndef LIBJPEG_ENCAP_EXTERNAL
-#include <setjmp.h>
-#endif
-
-#include "jpeglib.h"
-#include "jerror.h"
-
-typedef struct jpeg_error_mgr jpeg_error_mgr;
-typedef struct jpeg_common_struct jpeg_common_struct;
-typedef struct jpeg_decompress_struct jpeg_decompress_struct;
-typedef struct jpeg_source_mgr jpeg_source_mgr;
-
-typedef enum {
-	osibsNotSetYet,
-	osibsJpegInterchangeFormat,
-	osibsStrile,
-	osibsEof
-} OJPEGStateInBufferSource;
-
-typedef enum {
-	ososSoi,
-	ososQTable0,ososQTable1,ososQTable2,ososQTable3,
-	ososDcTable0,ososDcTable1,ososDcTable2,ososDcTable3,
-	ososAcTable0,ososAcTable1,ososAcTable2,ososAcTable3,
-	ososDri,
-	ososSof,
-	ososSos,
-	ososCompressed,
-	ososRst,
-	ososEoi
-} OJPEGStateOutState;
-
-typedef struct {
-	TIFF* tif;
-	#ifndef LIBJPEG_ENCAP_EXTERNAL
-	JMP_BUF exit_jmpbuf;
-	#endif
-	TIFFVGetMethod vgetparent;
-	TIFFVSetMethod vsetparent;
-	toff_t file_size;
-	uint32 image_width;
-	uint32 image_length;
-	uint32 strile_width;
-	uint32 strile_length;
-	uint32 strile_length_total;
-	uint8 samples_per_pixel;
-	uint8 plane_sample_offset;
-	uint8 samples_per_pixel_per_plane;
-	toff_t jpeg_interchange_format;
-	toff_t jpeg_interchange_format_length;
-	uint8 jpeg_proc;
-	uint8 subsamplingcorrect;
-	uint8 subsamplingcorrect_done;
-	uint8 subsampling_tag;
-	uint8 subsampling_hor;
-	uint8 subsampling_ver;
-	uint8 subsampling_force_desubsampling_inside_decompression;
-	uint8 qtable_offset_count;
-	uint8 dctable_offset_count;
-	uint8 actable_offset_count;
-	toff_t qtable_offset[3];
-	toff_t dctable_offset[3];
-	toff_t actable_offset[3];
-	uint8* qtable[4];
-	uint8* dctable[4];
-	uint8* actable[4];
-	uint16 restart_interval;
-	uint8 restart_index;
-	uint8 sof_log;
-	uint8 sof_marker_id;
-	uint32 sof_x;
-	uint32 sof_y;
-	uint8 sof_c[3];
-	uint8 sof_hv[3];
-	uint8 sof_tq[3];
-	uint8 sos_cs[3];
-	uint8 sos_tda[3];
-	struct {
-		uint8 log;
-		OJPEGStateInBufferSource in_buffer_source;
-		tstrile_t in_buffer_next_strile;
-		toff_t in_buffer_file_pos;
-		toff_t in_buffer_file_togo;
-	} sos_end[3];
-	uint8 readheader_done;
-	uint8 writeheader_done;
-	tsample_t write_cursample;
-	tstrile_t write_curstrile;
-	uint8 libjpeg_session_active;
-	uint8 libjpeg_jpeg_query_style;
-	jpeg_error_mgr libjpeg_jpeg_error_mgr;
-	jpeg_decompress_struct libjpeg_jpeg_decompress_struct;
-	jpeg_source_mgr libjpeg_jpeg_source_mgr;
-	uint8 subsampling_convert_log;
-	uint32 subsampling_convert_ylinelen;
-	uint32 subsampling_convert_ylines;
-	uint32 subsampling_convert_clinelen;
-	uint32 subsampling_convert_clines;
-	uint32 subsampling_convert_ybuflen;
-	uint32 subsampling_convert_cbuflen;
-	uint32 subsampling_convert_ycbcrbuflen;
-	uint8* subsampling_convert_ycbcrbuf;
-	uint8* subsampling_convert_ybuf;
-	uint8* subsampling_convert_cbbuf;
-	uint8* subsampling_convert_crbuf;
-	uint32 subsampling_convert_ycbcrimagelen;
-	uint8** subsampling_convert_ycbcrimage;
-	uint32 subsampling_convert_clinelenout;
-	uint32 subsampling_convert_state;
-	uint32 bytes_per_line;   /* if the codec outputs subsampled data, a 'line' in bytes_per_line */
-	uint32 lines_per_strile; /* and lines_per_strile means subsampling_ver desubsampled rows     */
-	OJPEGStateInBufferSource in_buffer_source;
-	tstrile_t in_buffer_next_strile;
-	tstrile_t in_buffer_strile_count;
-	toff_t in_buffer_file_pos;
-	uint8 in_buffer_file_pos_log;
-	toff_t in_buffer_file_togo;
-	uint16 in_buffer_togo;
-	uint8* in_buffer_cur;
-	uint8 in_buffer[OJPEG_BUFFER];
-	OJPEGStateOutState out_state;
-	uint8 out_buffer[OJPEG_BUFFER];
-	uint8* skip_buffer;
-} OJPEGState;
-
-static int OJPEGVGetField(TIFF* tif, ttag_t tag, va_list ap);
-static int OJPEGVSetField(TIFF* tif, ttag_t tag, va_list ap);
-static void OJPEGPrintDir(TIFF* tif, FILE* fd, long flags);
-
-static int OJPEGSetupDecode(TIFF* tif);
-static int OJPEGPreDecode(TIFF* tif, tsample_t s);
-static int OJPEGPreDecodeSkipRaw(TIFF* tif);
-static int OJPEGPreDecodeSkipScanlines(TIFF* tif);
-static int OJPEGDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s);
-static int OJPEGDecodeRaw(TIFF* tif, tidata_t buf, tsize_t cc);
-static int OJPEGDecodeScanlines(TIFF* tif, tidata_t buf, tsize_t cc);
-static void OJPEGPostDecode(TIFF* tif, tidata_t buf, tsize_t cc);
-static int OJPEGSetupEncode(TIFF* tif);
-static int OJPEGPreEncode(TIFF* tif, tsample_t s);
-static int OJPEGEncode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s);
-static int OJPEGPostEncode(TIFF* tif);
-static void OJPEGCleanup(TIFF* tif);
-
-static void OJPEGSubsamplingCorrect(TIFF* tif);
-static int OJPEGReadHeaderInfo(TIFF* tif);
-static int OJPEGReadSecondarySos(TIFF* tif, tsample_t s);
-static int OJPEGWriteHeaderInfo(TIFF* tif);
-static void OJPEGLibjpegSessionAbort(TIFF* tif);
-
-static int OJPEGReadHeaderInfoSec(TIFF* tif);
-static int OJPEGReadHeaderInfoSecStreamDri(TIFF* tif);
-static int OJPEGReadHeaderInfoSecStreamDqt(TIFF* tif);
-static int OJPEGReadHeaderInfoSecStreamDht(TIFF* tif);
-static int OJPEGReadHeaderInfoSecStreamSof(TIFF* tif, uint8 marker_id);
-static int OJPEGReadHeaderInfoSecStreamSos(TIFF* tif);
-static int OJPEGReadHeaderInfoSecTablesQTable(TIFF* tif);
-static int OJPEGReadHeaderInfoSecTablesDcTable(TIFF* tif);
-static int OJPEGReadHeaderInfoSecTablesAcTable(TIFF* tif);
-
-static int OJPEGReadBufferFill(OJPEGState* sp);
-static int OJPEGReadByte(OJPEGState* sp, uint8* byte);
-static int OJPEGReadBytePeek(OJPEGState* sp, uint8* byte);
-static void OJPEGReadByteAdvance(OJPEGState* sp);
-static int OJPEGReadWord(OJPEGState* sp, uint16* word);
-static int OJPEGReadBlock(OJPEGState* sp, uint16 len, void* mem);
-static void OJPEGReadSkip(OJPEGState* sp, uint16 len);
-
-static int OJPEGWriteStream(TIFF* tif, void** mem, uint32* len);
-static void OJPEGWriteStreamSoi(TIFF* tif, void** mem, uint32* len);
-static void OJPEGWriteStreamQTable(TIFF* tif, uint8 table_index, void** mem, uint32* len);
-static void OJPEGWriteStreamDcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len);
-static void OJPEGWriteStreamAcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len);
-static void OJPEGWriteStreamDri(TIFF* tif, void** mem, uint32* len);
-static void OJPEGWriteStreamSof(TIFF* tif, void** mem, uint32* len);
-static void OJPEGWriteStreamSos(TIFF* tif, void** mem, uint32* len);
-static int OJPEGWriteStreamCompressed(TIFF* tif, void** mem, uint32* len);
-static void OJPEGWriteStreamRst(TIFF* tif, void** mem, uint32* len);
-static void OJPEGWriteStreamEoi(TIFF* tif, void** mem, uint32* len);
-
-#ifdef LIBJPEG_ENCAP_EXTERNAL
-extern int jpeg_create_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo);
-extern int jpeg_read_header_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, uint8 require_image);
-extern int jpeg_start_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo);
-extern int jpeg_read_scanlines_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* scanlines, uint32 max_lines);
-extern int jpeg_read_raw_data_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* data, uint32 max_lines);
-extern void jpeg_encap_unwind(TIFF* tif);
-#else
-static int jpeg_create_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* j);
-static int jpeg_read_header_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, uint8 require_image);
-static int jpeg_start_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo);
-static int jpeg_read_scanlines_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* scanlines, uint32 max_lines);
-static int jpeg_read_raw_data_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* data, uint32 max_lines);
-static void jpeg_encap_unwind(TIFF* tif);
-#endif
-
-static void OJPEGLibjpegJpegErrorMgrOutputMessage(jpeg_common_struct* cinfo);
-static void OJPEGLibjpegJpegErrorMgrErrorExit(jpeg_common_struct* cinfo);
-static void OJPEGLibjpegJpegSourceMgrInitSource(jpeg_decompress_struct* cinfo);
-static boolean OJPEGLibjpegJpegSourceMgrFillInputBuffer(jpeg_decompress_struct* cinfo);
-static void OJPEGLibjpegJpegSourceMgrSkipInputData(jpeg_decompress_struct* cinfo, long num_bytes);
-static boolean OJPEGLibjpegJpegSourceMgrResyncToRestart(jpeg_decompress_struct* cinfo, int desired);
-static void OJPEGLibjpegJpegSourceMgrTermSource(jpeg_decompress_struct* cinfo);
-
-int
-TIFFInitOJPEG(TIFF* tif, int scheme)
-{
-	static const char module[]="TIFFInitOJPEG";
-	OJPEGState* sp;
-
-	assert(scheme==COMPRESSION_OJPEG);
-
-        /*
-	 * Merge codec-specific tag information.
-	 */
-	if (!_TIFFMergeFieldInfo(tif,ojpeg_field_info,FIELD_OJPEG_COUNT)) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-			     "Merging Old JPEG codec-specific tags failed");
-		return 0;
-	}
-
-	/* state block */
-	sp=_TIFFmalloc(sizeof(OJPEGState));
-	if (sp==NULL)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"No space for OJPEG state block");
-		return(0);
-	}
-	_TIFFmemset(sp,0,sizeof(OJPEGState));
-	sp->tif=tif;
-	sp->jpeg_proc=1;
-	sp->subsampling_hor=2;
-	sp->subsampling_ver=2;
-	TIFFSetField(tif,TIFFTAG_YCBCRSUBSAMPLING,2,2);
-	/* tif codec methods */
-	tif->tif_setupdecode=OJPEGSetupDecode;
-	tif->tif_predecode=OJPEGPreDecode;
-	tif->tif_postdecode=OJPEGPostDecode;
-	tif->tif_decoderow=OJPEGDecode;
-	tif->tif_decodestrip=OJPEGDecode;
-	tif->tif_decodetile=OJPEGDecode;
-	tif->tif_setupencode=OJPEGSetupEncode;
-	tif->tif_preencode=OJPEGPreEncode;
-	tif->tif_postencode=OJPEGPostEncode;
-	tif->tif_encoderow=OJPEGEncode;
-	tif->tif_encodestrip=OJPEGEncode;
-	tif->tif_encodetile=OJPEGEncode;
-	tif->tif_cleanup=OJPEGCleanup;
-	tif->tif_data=(tidata_t)sp;
-	/* tif tag methods */
-	sp->vgetparent=tif->tif_tagmethods.vgetfield;
-	tif->tif_tagmethods.vgetfield=OJPEGVGetField;
-	sp->vsetparent=tif->tif_tagmethods.vsetfield;
-	tif->tif_tagmethods.vsetfield=OJPEGVSetField;
-	tif->tif_tagmethods.printdir=OJPEGPrintDir;
-	/* Some OJPEG files don't have strip or tile offsets or bytecounts tags.
-	   Some others do, but have totally meaningless or corrupt values
-	   in these tags. In these cases, the JpegInterchangeFormat stream is
-	   reliable. In any case, this decoder reads the compressed data itself,
-	   from the most reliable locations, and we need to notify encapsulating
-	   LibTiff not to read raw strips or tiles for us. */
-	tif->tif_flags|=TIFF_NOREADRAW;
-	return(1);
-}
-
-static int
-OJPEGVGetField(TIFF* tif, ttag_t tag, va_list ap)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	switch(tag)
-	{
-		case TIFFTAG_JPEGIFOFFSET:
-			*va_arg(ap,uint32*)=(uint32)sp->jpeg_interchange_format;
-			break;
-		case TIFFTAG_JPEGIFBYTECOUNT:
-			*va_arg(ap,uint32*)=(uint32)sp->jpeg_interchange_format_length;
-			break;
-		case TIFFTAG_YCBCRSUBSAMPLING:
-			if (sp->subsamplingcorrect_done==0)
-				OJPEGSubsamplingCorrect(tif);
-			*va_arg(ap,uint16*)=(uint16)sp->subsampling_hor;
-			*va_arg(ap,uint16*)=(uint16)sp->subsampling_ver;
-			break;
-		case TIFFTAG_JPEGQTABLES:
-			*va_arg(ap,uint32*)=(uint32)sp->qtable_offset_count;
-			*va_arg(ap,void**)=(void*)sp->qtable_offset;
-			break;
-		case TIFFTAG_JPEGDCTABLES:
-			*va_arg(ap,uint32*)=(uint32)sp->dctable_offset_count;
-			*va_arg(ap,void**)=(void*)sp->dctable_offset;
-			break;
-		case TIFFTAG_JPEGACTABLES:
-			*va_arg(ap,uint32*)=(uint32)sp->actable_offset_count;
-			*va_arg(ap,void**)=(void*)sp->actable_offset;
-			break;
-		case TIFFTAG_JPEGPROC:
-			*va_arg(ap,uint16*)=(uint16)sp->jpeg_proc;
-			break;
-		case TIFFTAG_JPEGRESTARTINTERVAL:
-			*va_arg(ap,uint16*)=sp->restart_interval;
-			break;
-		default:
-			return (*sp->vgetparent)(tif,tag,ap);
-	}
-	return (1);
-}
-
-static int
-OJPEGVSetField(TIFF* tif, ttag_t tag, va_list ap)
-{
-	static const char module[]="OJPEGVSetField";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint32 ma;
-	uint32* mb;
-	uint32 n;
-	switch(tag)
-	{
-		case TIFFTAG_JPEGIFOFFSET:
-			sp->jpeg_interchange_format=(toff_t)va_arg(ap,uint32);  
-			break;
-		case TIFFTAG_JPEGIFBYTECOUNT:
-			sp->jpeg_interchange_format_length=(toff_t)va_arg(ap,uint32);  
-			break;
-		case TIFFTAG_YCBCRSUBSAMPLING:
-			sp->subsampling_tag=1;
-			sp->subsampling_hor=(uint8)va_arg(ap,int);
-			sp->subsampling_ver=(uint8)va_arg(ap,int);
-			tif->tif_dir.td_ycbcrsubsampling[0]=sp->subsampling_hor;
-			tif->tif_dir.td_ycbcrsubsampling[1]=sp->subsampling_ver;
-			break;
-		case TIFFTAG_JPEGQTABLES:
-			ma=va_arg(ap,uint32);
-			if (ma!=0)
-			{
-				if (ma>3)
-				{
-					TIFFErrorExt(tif->tif_clientdata,module,"JpegQTables tag has incorrect count");
-					return(0);
-				}
-				sp->qtable_offset_count=(uint8)ma;
-				mb=va_arg(ap,uint32*);
-				for (n=0; n<ma; n++)
-					sp->qtable_offset[n]=(toff_t)mb[n];
-			}
-			break;
-		case TIFFTAG_JPEGDCTABLES:
-			ma=va_arg(ap,uint32);
-			if (ma!=0)
-			{
-				if (ma>3)
-				{
-					TIFFErrorExt(tif->tif_clientdata,module,"JpegDcTables tag has incorrect count");
-					return(0);
-				}
-				sp->dctable_offset_count=(uint8)ma;
-				mb=va_arg(ap,uint32*);
-				for (n=0; n<ma; n++)
-					sp->dctable_offset[n]=(toff_t)mb[n];
-			}
-			break;
-		case TIFFTAG_JPEGACTABLES:
-			ma=va_arg(ap,uint32);
-			if (ma!=0)
-			{
-				if (ma>3)
-				{
-					TIFFErrorExt(tif->tif_clientdata,module,"JpegAcTables tag has incorrect count");
-					return(0);
-				}
-				sp->actable_offset_count=(uint8)ma;
-				mb=va_arg(ap,uint32*);
-				for (n=0; n<ma; n++)
-					sp->actable_offset[n]=(toff_t)mb[n];
-			}
-			break;
-		case TIFFTAG_JPEGPROC:
-			sp->jpeg_proc=(uint8)va_arg(ap,uint32);
-			break;
-		case TIFFTAG_JPEGRESTARTINTERVAL:
-			sp->restart_interval=(uint16)va_arg(ap,uint32);
-			break;
-		default:
-			return (*sp->vsetparent)(tif,tag,ap);
-	}
-	TIFFSetFieldBit(tif,_TIFFFieldWithTag(tif,tag)->field_bit);
-	tif->tif_flags|=TIFF_DIRTYDIRECT;
-	return(1);
-}
-
-static void
-OJPEGPrintDir(TIFF* tif, FILE* fd, long flags)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	(void)flags;
-	assert(sp!=NULL);
-	if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGINTERCHANGEFORMAT))
-		fprintf(fd,"  JpegInterchangeFormat: %lu\n",(unsigned long)sp->jpeg_interchange_format);
-	if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH))
-		fprintf(fd,"  JpegInterchangeFormatLength: %lu\n",(unsigned long)sp->jpeg_interchange_format_length);
-	if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGQTABLES))
-	{
-		fprintf(fd,"  JpegQTables:");
-		for (m=0; m<sp->qtable_offset_count; m++)
-			fprintf(fd," %lu",(unsigned long)sp->qtable_offset[m]);
-		fprintf(fd,"\n");
-	}
-	if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGDCTABLES))
-	{
-		fprintf(fd,"  JpegDcTables:");
-		for (m=0; m<sp->dctable_offset_count; m++)
-			fprintf(fd," %lu",(unsigned long)sp->dctable_offset[m]);
-		fprintf(fd,"\n");
-	}
-	if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGACTABLES))
-	{
-		fprintf(fd,"  JpegAcTables:");
-		for (m=0; m<sp->actable_offset_count; m++)
-			fprintf(fd," %lu",(unsigned long)sp->actable_offset[m]);
-		fprintf(fd,"\n");
-	}
-	if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGPROC))
-		fprintf(fd,"  JpegProc: %u\n",(unsigned int)sp->jpeg_proc);
-	if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGRESTARTINTERVAL))
-		fprintf(fd,"  JpegRestartInterval: %u\n",(unsigned int)sp->restart_interval);
-}
-
-static int
-OJPEGSetupDecode(TIFF* tif)
-{
-	static const char module[]="OJPEGSetupDecode";
-	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");
-	return(1);
-}
-
-static int
-OJPEGPreDecode(TIFF* tif, tsample_t s)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	tstrile_t m;
-	if (sp->subsamplingcorrect_done==0)
-		OJPEGSubsamplingCorrect(tif);
-	if (sp->readheader_done==0)
-	{
-		if (OJPEGReadHeaderInfo(tif)==0)
-			return(0);
-	}
-	if (sp->sos_end[s].log==0)
-	{
-		if (OJPEGReadSecondarySos(tif,s)==0)
-			return(0);
-	}
-	if isTiled(tif)
-		m=(tstrile_t)tif->tif_curtile;
-	else
-		m=(tstrile_t)tif->tif_curstrip;
-	if ((sp->writeheader_done!=0) && ((sp->write_cursample!=s) || (sp->write_curstrile>m)))
-	{
-		if (sp->libjpeg_session_active!=0)
-			OJPEGLibjpegSessionAbort(tif);
-		sp->writeheader_done=0;
-	}
-	if (sp->writeheader_done==0)
-	{
-		sp->plane_sample_offset=s;
-		sp->write_cursample=s;
-		sp->write_curstrile=s*tif->tif_dir.td_stripsperimage;
-		if ((sp->in_buffer_file_pos_log==0) ||
-		    (sp->in_buffer_file_pos-sp->in_buffer_togo!=sp->sos_end[s].in_buffer_file_pos))
-		{
-			sp->in_buffer_source=sp->sos_end[s].in_buffer_source;
-			sp->in_buffer_next_strile=sp->sos_end[s].in_buffer_next_strile;
-			sp->in_buffer_file_pos=sp->sos_end[s].in_buffer_file_pos;
-			sp->in_buffer_file_pos_log=0;
-			sp->in_buffer_file_togo=sp->sos_end[s].in_buffer_file_togo;
-			sp->in_buffer_togo=0;
-			sp->in_buffer_cur=0;
-		}
-		if (OJPEGWriteHeaderInfo(tif)==0)
-			return(0);
-	}
-	while (sp->write_curstrile<m)          
-	{
-		if (sp->libjpeg_jpeg_query_style==0)
-		{
-			if (OJPEGPreDecodeSkipRaw(tif)==0)
-				return(0);
-		}
-		else
-		{
-			if (OJPEGPreDecodeSkipScanlines(tif)==0)
-				return(0);
-		}
-		sp->write_curstrile++;
-	}
-	return(1);
-}
-
-static int
-OJPEGPreDecodeSkipRaw(TIFF* tif)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint32 m;
-	m=sp->lines_per_strile;
-	if (sp->subsampling_convert_state!=0)
-	{
-		if (sp->subsampling_convert_clines-sp->subsampling_convert_state>=m)
-		{
-			sp->subsampling_convert_state+=m;
-			if (sp->subsampling_convert_state==sp->subsampling_convert_clines)
-				sp->subsampling_convert_state=0;
-			return(1);
-		}
-		m-=sp->subsampling_convert_clines-sp->subsampling_convert_state;
-		sp->subsampling_convert_state=0;
-	}
-	while (m>=sp->subsampling_convert_clines)
-	{
-		if (jpeg_read_raw_data_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),sp->subsampling_convert_ycbcrimage,sp->subsampling_ver*8)==0)
-			return(0);
-		m-=sp->subsampling_convert_clines;
-	}
-	if (m>0)
-	{
-		if (jpeg_read_raw_data_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),sp->subsampling_convert_ycbcrimage,sp->subsampling_ver*8)==0)
-			return(0);
-		sp->subsampling_convert_state=m;
-	}
-	return(1);
-}
-
-static int
-OJPEGPreDecodeSkipScanlines(TIFF* tif)
-{
-	static const char module[]="OJPEGPreDecodeSkipScanlines";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint32 m;
-	if (sp->skip_buffer==NULL)
-	{
-		sp->skip_buffer=_TIFFmalloc(sp->bytes_per_line);
-		if (sp->skip_buffer==NULL)
-		{
-			TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-			return(0);
-		}
-	}
-	for (m=0; m<sp->lines_per_strile; m++)
-	{
-		if (jpeg_read_scanlines_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),&sp->skip_buffer,1)==0)
-			return(0);
-	}
-	return(1);
-}
-
-static int
-OJPEGDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	(void)s;
-	if (sp->libjpeg_jpeg_query_style==0)
-	{
-		if (OJPEGDecodeRaw(tif,buf,cc)==0)
-			return(0);
-	}
-	else
-	{
-		if (OJPEGDecodeScanlines(tif,buf,cc)==0)
-			return(0);
-	}
-	return(1);
-}
-
-static int
-OJPEGDecodeRaw(TIFF* tif, tidata_t buf, tsize_t cc)
-{
-	static const char module[]="OJPEGDecodeRaw";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8* m;
-	uint32 n;
-	uint8* oy;
-	uint8* ocb;
-	uint8* ocr;
-	uint8* p;
-	uint32 q;
-	uint8* r;
-	uint8 sx,sy;
-	if (cc%sp->bytes_per_line!=0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Fractional scanline not read");
-		return(0);
-	}
-	assert(cc>0);
-	m=buf;
-	n=cc;
-	do
-	{
-		if (sp->subsampling_convert_state==0)
-		{
-			if (jpeg_read_raw_data_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),sp->subsampling_convert_ycbcrimage,sp->subsampling_ver*8)==0)
-				return(0);
-		}
-		oy=sp->subsampling_convert_ybuf+sp->subsampling_convert_state*sp->subsampling_ver*sp->subsampling_convert_ylinelen;
-		ocb=sp->subsampling_convert_cbbuf+sp->subsampling_convert_state*sp->subsampling_convert_clinelen;
-		ocr=sp->subsampling_convert_crbuf+sp->subsampling_convert_state*sp->subsampling_convert_clinelen;
-		p=m;
-		for (q=0; q<sp->subsampling_convert_clinelenout; q++)
-		{
-			r=oy;
-			for (sy=0; sy<sp->subsampling_ver; sy++)
-			{
-				for (sx=0; sx<sp->subsampling_hor; sx++)
-					*p++=*r++;
-				r+=sp->subsampling_convert_ylinelen-sp->subsampling_hor;
-			}
-			oy+=sp->subsampling_hor;
-			*p++=*ocb++;
-			*p++=*ocr++;
-		}
-		sp->subsampling_convert_state++;
-		if (sp->subsampling_convert_state==sp->subsampling_convert_clines)
-			sp->subsampling_convert_state=0;
-		m+=sp->bytes_per_line;
-		n-=sp->bytes_per_line;
-	} while(n>0);
-	return(1);
-}
-
-static int
-OJPEGDecodeScanlines(TIFF* tif, tidata_t buf, tsize_t cc)
-{
-	static const char module[]="OJPEGDecodeScanlines";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8* m;
-	uint32 n;
-	if (cc%sp->bytes_per_line!=0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Fractional scanline not read");
-		return(0);
-	}
-	assert(cc>0);
-	m=buf;
-	n=cc;
-	do
-	{
-		if (jpeg_read_scanlines_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),&m,1)==0)
-			return(0);
-		m+=sp->bytes_per_line;
-		n-=sp->bytes_per_line;
-	} while(n>0);
-	return(1);
-}
-
-static void
-OJPEGPostDecode(TIFF* tif, tidata_t buf, tsize_t cc)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	(void)buf;
-	(void)cc;
-	sp->write_curstrile++;
-	if (sp->write_curstrile%tif->tif_dir.td_stripsperimage==0)
-	{
-		assert(sp->libjpeg_session_active!=0);
-		OJPEGLibjpegSessionAbort(tif);
-		sp->writeheader_done=0;
-	}
-}
-
-static int
-OJPEGSetupEncode(TIFF* tif)
-{
-	static const char module[]="OJPEGSetupEncode";
-	TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
-	return(0);
-}
-
-static int
-OJPEGPreEncode(TIFF* tif, tsample_t s)
-{
-	static const char module[]="OJPEGPreEncode";
-	(void)s;
-	TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
-	return(0);
-}
-
-static int
-OJPEGEncode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s)
-{
-	static const char module[]="OJPEGEncode";
-	(void)buf;
-	(void)cc;
-	(void)s;
-	TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
-	return(0);
-}
-
-static int
-OJPEGPostEncode(TIFF* tif)
-{
-	static const char module[]="OJPEGPostEncode";
-	TIFFErrorExt(tif->tif_clientdata,module,"OJPEG encoding not supported; use new-style JPEG compression instead");
-	return(0);
-}
-
-static void
-OJPEGCleanup(TIFF* tif)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	if (sp!=0)
-	{
-		tif->tif_tagmethods.vgetfield=sp->vgetparent;
-		tif->tif_tagmethods.vsetfield=sp->vsetparent;
-		if (sp->qtable[0]!=0)
-			_TIFFfree(sp->qtable[0]);
-		if (sp->qtable[1]!=0)
-			_TIFFfree(sp->qtable[1]);
-		if (sp->qtable[2]!=0)
-			_TIFFfree(sp->qtable[2]);
-		if (sp->qtable[3]!=0)
-			_TIFFfree(sp->qtable[3]);
-		if (sp->dctable[0]!=0)
-			_TIFFfree(sp->dctable[0]);
-		if (sp->dctable[1]!=0)
-			_TIFFfree(sp->dctable[1]);
-		if (sp->dctable[2]!=0)
-			_TIFFfree(sp->dctable[2]);
-		if (sp->dctable[3]!=0)
-			_TIFFfree(sp->dctable[3]);
-		if (sp->actable[0]!=0)
-			_TIFFfree(sp->actable[0]);
-		if (sp->actable[1]!=0)
-			_TIFFfree(sp->actable[1]);
-		if (sp->actable[2]!=0)
-			_TIFFfree(sp->actable[2]);
-		if (sp->actable[3]!=0)
-			_TIFFfree(sp->actable[3]);
-		if (sp->libjpeg_session_active!=0)
-			OJPEGLibjpegSessionAbort(tif);
-		if (sp->subsampling_convert_ycbcrbuf!=0)
-			_TIFFfree(sp->subsampling_convert_ycbcrbuf);
-		if (sp->subsampling_convert_ycbcrimage!=0)
-			_TIFFfree(sp->subsampling_convert_ycbcrimage);
-		if (sp->skip_buffer!=0)
-			_TIFFfree(sp->skip_buffer);
-		_TIFFfree(sp);
-		tif->tif_data=NULL;
-		_TIFFSetDefaultCompressionState(tif);
-	}
-}
-
-static void
-OJPEGSubsamplingCorrect(TIFF* tif)
-{
-	static const char module[]="OJPEGSubsamplingCorrect";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 mh;
-	uint8 mv;
-	assert(sp->subsamplingcorrect_done==0);
-	if ((tif->tif_dir.td_samplesperpixel!=3) || ((tif->tif_dir.td_photometric!=PHOTOMETRIC_YCBCR) &&
-	    (tif->tif_dir.td_photometric!=PHOTOMETRIC_ITULAB)))
-	{
-		if (sp->subsampling_tag!=0)
-			TIFFWarningExt(tif->tif_clientdata,module,"Subsampling tag not appropriate for this Photometric and/or SamplesPerPixel");
-		sp->subsampling_hor=1;
-		sp->subsampling_ver=1;
-		sp->subsampling_force_desubsampling_inside_decompression=0;
-	}
-	else
-	{
-		sp->subsamplingcorrect_done=1;
-		mh=sp->subsampling_hor;
-		mv=sp->subsampling_ver;
-		sp->subsamplingcorrect=1;
-		OJPEGReadHeaderInfoSec(tif);
-		if (sp->subsampling_force_desubsampling_inside_decompression!=0)
-		{
-			sp->subsampling_hor=1;
-			sp->subsampling_ver=1;
-		}
-		sp->subsamplingcorrect=0;
-		if (((sp->subsampling_hor!=mh) || (sp->subsampling_ver!=mv)) && (sp->subsampling_force_desubsampling_inside_decompression==0))
-		{
-			if (sp->subsampling_tag==0)
-				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);
-			else
-				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);
-		}
-		if (sp->subsampling_force_desubsampling_inside_decompression!=0)
-		{
-			if (sp->subsampling_tag==0)
-				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");
-			else
-				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);
-		}
-		if (sp->subsampling_force_desubsampling_inside_decompression==0)
-		{
-			if (sp->subsampling_hor<sp->subsampling_ver)
-				TIFFWarningExt(tif->tif_clientdata,module,"Subsampling values [%d,%d] are not allowed in TIFF",sp->subsampling_hor,sp->subsampling_ver);
-		}
-	}
-	sp->subsamplingcorrect_done=1;
-}
-
-static int
-OJPEGReadHeaderInfo(TIFF* tif)
-{
-	static const char module[]="OJPEGReadHeaderInfo";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	assert(sp->readheader_done==0);
-	sp->image_width=tif->tif_dir.td_imagewidth;
-	sp->image_length=tif->tif_dir.td_imagelength;
-	if isTiled(tif)
-	{
-		sp->strile_width=tif->tif_dir.td_tilewidth;
-		sp->strile_length=tif->tif_dir.td_tilelength;
-		sp->strile_length_total=((sp->image_length+sp->strile_length-1)/sp->strile_length)*sp->strile_length;
-	}
-	else
-	{
-		sp->strile_width=sp->image_width;
-		sp->strile_length=tif->tif_dir.td_rowsperstrip;
-		sp->strile_length_total=sp->image_length;
-	}
-	sp->samples_per_pixel=tif->tif_dir.td_samplesperpixel;
-	if (sp->samples_per_pixel==1)
-	{
-		sp->plane_sample_offset=0;
-		sp->samples_per_pixel_per_plane=sp->samples_per_pixel;
-		sp->subsampling_hor=1;
-		sp->subsampling_ver=1;
-	}
-	else
-	{
-		if (sp->samples_per_pixel!=3)
-		{
-			TIFFErrorExt(tif->tif_clientdata,module,"SamplesPerPixel %d not supported for this compression scheme",sp->samples_per_pixel);
-			return(0);
-		}
-		sp->plane_sample_offset=0;
-		if (tif->tif_dir.td_planarconfig==PLANARCONFIG_CONTIG)
-			sp->samples_per_pixel_per_plane=3;
-		else
-			sp->samples_per_pixel_per_plane=1;
-	}
-	if (sp->strile_length<sp->image_length)
-	{
-		if (sp->strile_length%(sp->subsampling_ver*8)!=0)
-		{
-			TIFFErrorExt(tif->tif_clientdata,module,"Incompatible vertical subsampling and image strip/tile length");
-			return(0);
-		}
-		sp->restart_interval=((sp->strile_width+sp->subsampling_hor*8-1)/(sp->subsampling_hor*8))*(sp->strile_length/(sp->subsampling_ver*8));
-	}
-	if (OJPEGReadHeaderInfoSec(tif)==0)
-		return(0);
-	sp->sos_end[0].log=1;
-	sp->sos_end[0].in_buffer_source=sp->in_buffer_source;
-	sp->sos_end[0].in_buffer_next_strile=sp->in_buffer_next_strile;
-	sp->sos_end[0].in_buffer_file_pos=sp->in_buffer_file_pos-sp->in_buffer_togo;
-	sp->sos_end[0].in_buffer_file_togo=sp->in_buffer_file_togo+sp->in_buffer_togo;
-	sp->readheader_done=1;
-	return(1);
-}
-
-static int
-OJPEGReadSecondarySos(TIFF* tif, tsample_t s)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	assert(s>0);
-	assert(s<3);
-	assert(sp->sos_end[0].log!=0);
-	assert(sp->sos_end[s].log==0);
-	sp->plane_sample_offset=s-1;
-	while(sp->sos_end[sp->plane_sample_offset].log==0)
-		sp->plane_sample_offset--;
-	sp->in_buffer_source=sp->sos_end[sp->plane_sample_offset].in_buffer_source;
-	sp->in_buffer_next_strile=sp->sos_end[sp->plane_sample_offset].in_buffer_next_strile;
-	sp->in_buffer_file_pos=sp->sos_end[sp->plane_sample_offset].in_buffer_file_pos;  
-	sp->in_buffer_file_pos_log=0;
-	sp->in_buffer_file_togo=sp->sos_end[sp->plane_sample_offset].in_buffer_file_togo;
-	sp->in_buffer_togo=0;
-	sp->in_buffer_cur=0;
-	while(sp->plane_sample_offset<s)
-	{
-		do
-		{
-			if (OJPEGReadByte(sp,&m)==0)
-				return(0);
-			if (m==255)
-			{
-				do
-				{
-					if (OJPEGReadByte(sp,&m)==0)
-						return(0);
-					if (m!=255)
-						break;
-				} while(1);
-				if (m==JPEG_MARKER_SOS)
-					break;
-			}
-		} while(1);
-		sp->plane_sample_offset++;
-		if (OJPEGReadHeaderInfoSecStreamSos(tif)==0)
-			return(0);
-		sp->sos_end[sp->plane_sample_offset].log=1;
-		sp->sos_end[sp->plane_sample_offset].in_buffer_source=sp->in_buffer_source;
-		sp->sos_end[sp->plane_sample_offset].in_buffer_next_strile=sp->in_buffer_next_strile;
-		sp->sos_end[sp->plane_sample_offset].in_buffer_file_pos=sp->in_buffer_file_pos-sp->in_buffer_togo;
-		sp->sos_end[sp->plane_sample_offset].in_buffer_file_togo=sp->in_buffer_file_togo+sp->in_buffer_togo;
-	}
-	return(1);
-}
-
-static int
-OJPEGWriteHeaderInfo(TIFF* tif)
-{
-	static const char module[]="OJPEGWriteHeaderInfo";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8** m;
-	uint32 n;
-	assert(sp->libjpeg_session_active==0);
-	sp->out_state=ososSoi;
-	sp->restart_index=0;
-	jpeg_std_error(&(sp->libjpeg_jpeg_error_mgr));
-	sp->libjpeg_jpeg_error_mgr.output_message=OJPEGLibjpegJpegErrorMgrOutputMessage;
-	sp->libjpeg_jpeg_error_mgr.error_exit=OJPEGLibjpegJpegErrorMgrErrorExit;
-	sp->libjpeg_jpeg_decompress_struct.err=&(sp->libjpeg_jpeg_error_mgr);
-	sp->libjpeg_jpeg_decompress_struct.client_data=(void*)tif;
-	if (jpeg_create_decompress_encap(sp,&(sp->libjpeg_jpeg_decompress_struct))==0)
-		return(0);
-	sp->libjpeg_session_active=1;
-	sp->libjpeg_jpeg_source_mgr.bytes_in_buffer=0;
-	sp->libjpeg_jpeg_source_mgr.init_source=OJPEGLibjpegJpegSourceMgrInitSource;
-	sp->libjpeg_jpeg_source_mgr.fill_input_buffer=OJPEGLibjpegJpegSourceMgrFillInputBuffer;
-	sp->libjpeg_jpeg_source_mgr.skip_input_data=OJPEGLibjpegJpegSourceMgrSkipInputData;
-	sp->libjpeg_jpeg_source_mgr.resync_to_restart=OJPEGLibjpegJpegSourceMgrResyncToRestart;
-	sp->libjpeg_jpeg_source_mgr.term_source=OJPEGLibjpegJpegSourceMgrTermSource;
-	sp->libjpeg_jpeg_decompress_struct.src=&(sp->libjpeg_jpeg_source_mgr);
-	if (jpeg_read_header_encap(sp,&(sp->libjpeg_jpeg_decompress_struct),1)==0)
-		return(0);
-	if ((sp->subsampling_force_desubsampling_inside_decompression==0) && (sp->samples_per_pixel_per_plane>1))
-	{
-		sp->libjpeg_jpeg_decompress_struct.raw_data_out=1;
-#if JPEG_LIB_VERSION >= 70
-		sp->libjpeg_jpeg_decompress_struct.do_fancy_upsampling=FALSE;
-#endif
-		sp->libjpeg_jpeg_query_style=0;
-		if (sp->subsampling_convert_log==0)
-		{
-			assert(sp->subsampling_convert_ycbcrbuf==0);
-			assert(sp->subsampling_convert_ycbcrimage==0);
-			sp->subsampling_convert_ylinelen=((sp->strile_width+sp->subsampling_hor*8-1)/(sp->subsampling_hor*8)*sp->subsampling_hor*8);
-			sp->subsampling_convert_ylines=sp->subsampling_ver*8;
-			sp->subsampling_convert_clinelen=sp->subsampling_convert_ylinelen/sp->subsampling_hor;
-			sp->subsampling_convert_clines=8;
-			sp->subsampling_convert_ybuflen=sp->subsampling_convert_ylinelen*sp->subsampling_convert_ylines;
-			sp->subsampling_convert_cbuflen=sp->subsampling_convert_clinelen*sp->subsampling_convert_clines;
-			sp->subsampling_convert_ycbcrbuflen=sp->subsampling_convert_ybuflen+2*sp->subsampling_convert_cbuflen;
-			sp->subsampling_convert_ycbcrbuf=_TIFFmalloc(sp->subsampling_convert_ycbcrbuflen);
-			if (sp->subsampling_convert_ycbcrbuf==0)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-				return(0);
-			}
-			sp->subsampling_convert_ybuf=sp->subsampling_convert_ycbcrbuf;
-			sp->subsampling_convert_cbbuf=sp->subsampling_convert_ybuf+sp->subsampling_convert_ybuflen;
-			sp->subsampling_convert_crbuf=sp->subsampling_convert_cbbuf+sp->subsampling_convert_cbuflen;
-			sp->subsampling_convert_ycbcrimagelen=3+sp->subsampling_convert_ylines+2*sp->subsampling_convert_clines;
-			sp->subsampling_convert_ycbcrimage=_TIFFmalloc(sp->subsampling_convert_ycbcrimagelen*sizeof(uint8*));
-			if (sp->subsampling_convert_ycbcrimage==0)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-				return(0);
-			}
-			m=sp->subsampling_convert_ycbcrimage;
-			*m++=(uint8*)(sp->subsampling_convert_ycbcrimage+3);
-			*m++=(uint8*)(sp->subsampling_convert_ycbcrimage+3+sp->subsampling_convert_ylines);
-			*m++=(uint8*)(sp->subsampling_convert_ycbcrimage+3+sp->subsampling_convert_ylines+sp->subsampling_convert_clines);
-			for (n=0; n<sp->subsampling_convert_ylines; n++)
-				*m++=sp->subsampling_convert_ybuf+n*sp->subsampling_convert_ylinelen;
-			for (n=0; n<sp->subsampling_convert_clines; n++)
-				*m++=sp->subsampling_convert_cbbuf+n*sp->subsampling_convert_clinelen;
-			for (n=0; n<sp->subsampling_convert_clines; n++)
-				*m++=sp->subsampling_convert_crbuf+n*sp->subsampling_convert_clinelen;
-			sp->subsampling_convert_clinelenout=((sp->strile_width+sp->subsampling_hor-1)/sp->subsampling_hor);
-			sp->subsampling_convert_state=0;
-			sp->bytes_per_line=sp->subsampling_convert_clinelenout*(sp->subsampling_ver*sp->subsampling_hor+2);
-			sp->lines_per_strile=((sp->strile_length+sp->subsampling_ver-1)/sp->subsampling_ver);
-			sp->subsampling_convert_log=1;
-		}
-	}
-	else
-	{
-		sp->libjpeg_jpeg_decompress_struct.jpeg_color_space=JCS_UNKNOWN;
-		sp->libjpeg_jpeg_decompress_struct.out_color_space=JCS_UNKNOWN;
-		sp->libjpeg_jpeg_query_style=1;
-		sp->bytes_per_line=sp->samples_per_pixel_per_plane*sp->strile_width;
-		sp->lines_per_strile=sp->strile_length;
-	}
-	if (jpeg_start_decompress_encap(sp,&(sp->libjpeg_jpeg_decompress_struct))==0)
-		return(0);
-	sp->writeheader_done=1;
-	return(1);
-}
-
-static void
-OJPEGLibjpegSessionAbort(TIFF* tif)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	assert(sp->libjpeg_session_active!=0);
-	jpeg_destroy((jpeg_common_struct*)(&(sp->libjpeg_jpeg_decompress_struct)));
-	sp->libjpeg_session_active=0;
-}
-
-static int
-OJPEGReadHeaderInfoSec(TIFF* tif)
-{
-	static const char module[]="OJPEGReadHeaderInfoSec";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	uint16 n;
-	uint8 o;
-	if (sp->file_size==0)
-		sp->file_size=TIFFGetFileSize(tif);
-	if (sp->jpeg_interchange_format!=0)
-	{
-		if (sp->jpeg_interchange_format>=sp->file_size)
-		{
-			sp->jpeg_interchange_format=0;
-			sp->jpeg_interchange_format_length=0;
-		}
-		else
-		{
-			if ((sp->jpeg_interchange_format_length==0) || (sp->jpeg_interchange_format+sp->jpeg_interchange_format_length>sp->file_size))
-				sp->jpeg_interchange_format_length=sp->file_size-sp->jpeg_interchange_format;
-		}
-	}
-	sp->in_buffer_source=osibsNotSetYet;
-	sp->in_buffer_next_strile=0;
-	sp->in_buffer_strile_count=tif->tif_dir.td_nstrips;   
-	sp->in_buffer_file_togo=0;
-	sp->in_buffer_togo=0;
-	do
-	{
-		if (OJPEGReadBytePeek(sp,&m)==0)
-			return(0);
-		if (m!=255)
-			break;
-		OJPEGReadByteAdvance(sp);
-		do
-		{
-			if (OJPEGReadByte(sp,&m)==0)
-				return(0);
-		} while(m==255);
-		switch(m)
-		{
-			case JPEG_MARKER_SOI:
-				/* this type of marker has no data, and should be skipped */
-				break;
-			case JPEG_MARKER_COM:
-			case JPEG_MARKER_APP0:
-			case JPEG_MARKER_APP0+1:
-			case JPEG_MARKER_APP0+2:
-			case JPEG_MARKER_APP0+3:
-			case JPEG_MARKER_APP0+4:
-			case JPEG_MARKER_APP0+5:
-			case JPEG_MARKER_APP0+6:
-			case JPEG_MARKER_APP0+7:
-			case JPEG_MARKER_APP0+8:
-			case JPEG_MARKER_APP0+9:
-			case JPEG_MARKER_APP0+10:
-			case JPEG_MARKER_APP0+11:
-			case JPEG_MARKER_APP0+12:
-			case JPEG_MARKER_APP0+13:
-			case JPEG_MARKER_APP0+14:
-			case JPEG_MARKER_APP0+15:
-				/* this type of marker has data, but it has no use to us (and no place here) and should be skipped */
-				if (OJPEGReadWord(sp,&n)==0)
-					return(0);
-				if (n<2)
-				{
-					if (sp->subsamplingcorrect==0)
-						TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JPEG data");
-					return(0);
-				}
-				if (n>2)
-					OJPEGReadSkip(sp,n-2);
-				break;
-			case JPEG_MARKER_DRI:
-				if (OJPEGReadHeaderInfoSecStreamDri(tif)==0)
-					return(0);
-				break;
-			case JPEG_MARKER_DQT:
-				if (OJPEGReadHeaderInfoSecStreamDqt(tif)==0)
-					return(0);
-				break;
-			case JPEG_MARKER_DHT:
-				if (OJPEGReadHeaderInfoSecStreamDht(tif)==0)
-					return(0);
-				break;
-			case JPEG_MARKER_SOF0:
-			case JPEG_MARKER_SOF1:
-			case JPEG_MARKER_SOF3:
-				if (OJPEGReadHeaderInfoSecStreamSof(tif,m)==0)
-					return(0);
-				if (sp->subsamplingcorrect!=0)
-					return(1);
-				break;
-			case JPEG_MARKER_SOS:
-				if (sp->subsamplingcorrect!=0)
-					return(1);
-				assert(sp->plane_sample_offset==0);
-				if (OJPEGReadHeaderInfoSecStreamSos(tif)==0)
-					return(0);
-				break;
-			default:
-				TIFFErrorExt(tif->tif_clientdata,module,"Unknown marker type %d in JPEG data",m);
-				return(0);
-		}
-	} while(m!=JPEG_MARKER_SOS);
-	if (sp->subsamplingcorrect)
-		return(1);
-	if (sp->sof_log==0)
-	{
-		if (OJPEGReadHeaderInfoSecTablesQTable(tif)==0)
-			return(0);
-		sp->sof_marker_id=JPEG_MARKER_SOF0;
-		for (o=0; o<sp->samples_per_pixel; o++)
-			sp->sof_c[o]=o;
-		sp->sof_hv[0]=((sp->subsampling_hor<<4)|sp->subsampling_ver);
-		for (o=1; o<sp->samples_per_pixel; o++)
-			sp->sof_hv[o]=17;
-		sp->sof_x=sp->strile_width;
-		sp->sof_y=sp->strile_length_total;
-		sp->sof_log=1;
-		if (OJPEGReadHeaderInfoSecTablesDcTable(tif)==0)
-			return(0);
-		if (OJPEGReadHeaderInfoSecTablesAcTable(tif)==0)
-			return(0);
-		for (o=1; o<sp->samples_per_pixel; o++)
-			sp->sos_cs[o]=o;
-	}
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecStreamDri(TIFF* tif)
-{
-	/* this could easilly cause trouble in some cases... but no such cases have occured sofar */
-	static const char module[]="OJPEGReadHeaderInfoSecStreamDri";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint16 m;
-	if (OJPEGReadWord(sp,&m)==0)
-		return(0);
-	if (m!=4)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DRI marker in JPEG data");
-		return(0);
-	}
-	if (OJPEGReadWord(sp,&m)==0)
-		return(0);
-	sp->restart_interval=m;
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecStreamDqt(TIFF* tif)
-{
-	/* this is a table marker, and it is to be saved as a whole for exact pushing on the jpeg stream later on */
-	static const char module[]="OJPEGReadHeaderInfoSecStreamDqt";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint16 m;
-	uint32 na;
-	uint8* nb;
-	uint8 o;
-	if (OJPEGReadWord(sp,&m)==0)
-		return(0);
-	if (m<=2)
-	{
-		if (sp->subsamplingcorrect==0)
-			TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DQT marker in JPEG data");
-		return(0);
-	}
-	if (sp->subsamplingcorrect!=0)
-		OJPEGReadSkip(sp,m-2);
-	else
-	{
-		m-=2;
-		do
-		{
-			if (m<65)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DQT marker in JPEG data");
-				return(0);
-			}
-			na=sizeof(uint32)+69;
-			nb=_TIFFmalloc(na);
-			if (nb==0)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-				return(0);
-			}
-			*(uint32*)nb=na;
-			nb[sizeof(uint32)]=255;
-			nb[sizeof(uint32)+1]=JPEG_MARKER_DQT;
-			nb[sizeof(uint32)+2]=0;
-			nb[sizeof(uint32)+3]=67;
-			if (OJPEGReadBlock(sp,65,&nb[sizeof(uint32)+4])==0)
-				return(0);
-			o=nb[sizeof(uint32)+4]&15;
-			if (3<o)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DQT marker in JPEG data");
-				return(0);
-			}
-			if (sp->qtable[o]!=0)
-				_TIFFfree(sp->qtable[o]);
-			sp->qtable[o]=nb;
-			m-=65;
-		} while(m>0);
-	}
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecStreamDht(TIFF* tif)
-{
-	/* this is a table marker, and it is to be saved as a whole for exact pushing on the jpeg stream later on */
-	/* TODO: the following assumes there is only one table in this marker... but i'm not quite sure that assumption is guaranteed correct */
-	static const char module[]="OJPEGReadHeaderInfoSecStreamDht";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint16 m;
-	uint32 na;
-	uint8* nb;
-	uint8 o;
-	if (OJPEGReadWord(sp,&m)==0)
-		return(0);
-	if (m<=2)
-	{
-		if (sp->subsamplingcorrect==0)
-			TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
-		return(0);
-	}
-	if (sp->subsamplingcorrect!=0)
-	{
-		OJPEGReadSkip(sp,m-2);
-	}
-	else
-	{
-		na=sizeof(uint32)+2+m;
-		nb=_TIFFmalloc(na);
-		if (nb==0)
-		{
-			TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-			return(0);
-		}
-		*(uint32*)nb=na;
-		nb[sizeof(uint32)]=255;
-		nb[sizeof(uint32)+1]=JPEG_MARKER_DHT;
-		nb[sizeof(uint32)+2]=(m>>8);
-		nb[sizeof(uint32)+3]=(m&255);
-		if (OJPEGReadBlock(sp,m-2,&nb[sizeof(uint32)+4])==0)
-			return(0);
-		o=nb[sizeof(uint32)+4];
-		if ((o&240)==0)
-		{
-			if (3<o)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
-				return(0);
-			}
-			if (sp->dctable[o]!=0)
-				_TIFFfree(sp->dctable[o]);
-			sp->dctable[o]=nb;
-		}
-		else
-		{
-			if ((o&240)!=16)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
-				return(0);
-			}
-			o&=15;
-			if (3<o)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DHT marker in JPEG data");
-				return(0);
-			}
-			if (sp->actable[o]!=0)
-				_TIFFfree(sp->actable[o]);
-			sp->actable[o]=nb;
-		}
-	}
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecStreamSof(TIFF* tif, uint8 marker_id)
-{
-	/* this marker needs to be checked, and part of its data needs to be saved for regeneration later on */
-	static const char module[]="OJPEGReadHeaderInfoSecStreamSof";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint16 m;
-	uint16 n;
-	uint8 o;
-	uint16 p;
-	uint16 q;
-	if (sp->sof_log!=0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JPEG data");
-		return(0);
-	}
-	if (sp->subsamplingcorrect==0)
-		sp->sof_marker_id=marker_id;
-	/* Lf: data length */
-	if (OJPEGReadWord(sp,&m)==0)
-		return(0);
-	if (m<11)
-	{
-		if (sp->subsamplingcorrect==0)
-			TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOF marker in JPEG data");
-		return(0);
-	}
-	m-=8;
-	if (m%3!=0)
-	{
-		if (sp->subsamplingcorrect==0)
-			TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOF marker in JPEG data");
-		return(0);
-	}
-	n=m/3;
-	if (sp->subsamplingcorrect==0)
-	{
-		if (n!=sp->samples_per_pixel)
-		{
-			TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected number of samples");
-			return(0);
-		}
-	}
-	/* P: Sample precision */
-	if (OJPEGReadByte(sp,&o)==0)
-		return(0);
-	if (o!=8)
-	{
-		if (sp->subsamplingcorrect==0)
-			TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected number of bits per sample");
-		return(0);
-	}
-	/* Y: Number of lines, X: Number of samples per line */
-	if (sp->subsamplingcorrect)
-		OJPEGReadSkip(sp,4);
-	else
-	{
-		/* TODO: probably best to also add check on allowed upper bound, especially x, may cause buffer overflow otherwise i think */
-		/* Y: Number of lines */
-		if (OJPEGReadWord(sp,&p)==0)
-			return(0);
-		if ((p<sp->image_length) && (p<sp->strile_length_total))
-		{
-			TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected height");
-			return(0);
-		}
-		sp->sof_y=p;
-		/* X: Number of samples per line */
-		if (OJPEGReadWord(sp,&p)==0)
-			return(0);
-		if ((p<sp->image_width) && (p<sp->strile_width))
-		{
-			TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected width");
-			return(0);
-		}
-		sp->sof_x=p;
-	}
-	/* Nf: Number of image components in frame */
-	if (OJPEGReadByte(sp,&o)==0)
-		return(0);
-	if (o!=n)
-	{
-		if (sp->subsamplingcorrect==0)
-			TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOF marker in JPEG data");
-		return(0);
-	}
-	/* per component stuff */
-	/* 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 */
-	for (q=0; q<n; q++)
-	{
-		/* C: Component identifier */
-		if (OJPEGReadByte(sp,&o)==0)
-			return(0);
-		if (sp->subsamplingcorrect==0)
-			sp->sof_c[q]=o;
-		/* H: Horizontal sampling factor, and V: Vertical sampling factor */
-		if (OJPEGReadByte(sp,&o)==0)
-			return(0);
-		if (sp->subsamplingcorrect!=0)
-		{
-			if (q==0)
-			{
-				sp->subsampling_hor=(o>>4);
-				sp->subsampling_ver=(o&15);
-				if (((sp->subsampling_hor!=1) && (sp->subsampling_hor!=2) && (sp->subsampling_hor!=4)) ||
-					((sp->subsampling_ver!=1) && (sp->subsampling_ver!=2) && (sp->subsampling_ver!=4)))
-					sp->subsampling_force_desubsampling_inside_decompression=1;
-			}
-			else
-			{
-				if (o!=17)
-					sp->subsampling_force_desubsampling_inside_decompression=1;
-			}
-		}
-		else
-		{
-			sp->sof_hv[q]=o;
-			if (sp->subsampling_force_desubsampling_inside_decompression==0)
-			{
-				if (q==0)
-				{
-					if (o!=((sp->subsampling_hor<<4)|sp->subsampling_ver))
-					{
-						TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected subsampling values");
-						return(0);
-					}
-				}
-				else
-				{
-					if (o!=17)
-					{
-						TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected subsampling values");
-						return(0);
-					}
-				}
-			}
-		}
-		/* Tq: Quantization table destination selector */
-		if (OJPEGReadByte(sp,&o)==0)
-			return(0);
-		if (sp->subsamplingcorrect==0)
-			sp->sof_tq[q]=o;
-	}
-	if (sp->subsamplingcorrect==0)
-		sp->sof_log=1;
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecStreamSos(TIFF* tif)
-{
-	/* this marker needs to be checked, and part of its data needs to be saved for regeneration later on */
-	static const char module[]="OJPEGReadHeaderInfoSecStreamSos";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint16 m;
-	uint8 n;
-	uint8 o;
-	assert(sp->subsamplingcorrect==0);
-	if (sp->sof_log==0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOS marker in JPEG data");
-		return(0);
-	}
-	/* Ls */
-	if (OJPEGReadWord(sp,&m)==0)
-		return(0);
-	if (m!=6+sp->samples_per_pixel_per_plane*2)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOS marker in JPEG data");
-		return(0);
-	}
-	/* Ns */
-	if (OJPEGReadByte(sp,&n)==0)
-		return(0);
-	if (n!=sp->samples_per_pixel_per_plane)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Corrupt SOS marker in JPEG data");
-		return(0);
-	}
-	/* Cs, Td, and Ta */
-	for (o=0; o<sp->samples_per_pixel_per_plane; o++)
-	{
-		/* Cs */
-		if (OJPEGReadByte(sp,&n)==0)
-			return(0);
-		sp->sos_cs[sp->plane_sample_offset+o]=n;
-		/* Td and Ta */
-		if (OJPEGReadByte(sp,&n)==0)
-			return(0);
-		sp->sos_tda[sp->plane_sample_offset+o]=n;
-	}
-	/* skip Ss, Se, Ah, en Al -> no check, as per Tom Lane recommendation, as per LibJpeg source */
-	OJPEGReadSkip(sp,3);
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecTablesQTable(TIFF* tif)
-{
-	static const char module[]="OJPEGReadHeaderInfoSecTablesQTable";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	uint8 n;
-	uint32 oa;
-	uint8* ob;
-	uint32 p;
-	if (sp->qtable_offset[0]==0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Missing JPEG tables");
-		return(0);
-	}
-	sp->in_buffer_file_pos_log=0;
-	for (m=0; m<sp->samples_per_pixel; m++)
-	{
-		if ((sp->qtable_offset[m]!=0) && ((m==0) || (sp->qtable_offset[m]!=sp->qtable_offset[m-1])))
-		{
-			for (n=0; n<m-1; n++)
-			{
-				if (sp->qtable_offset[m]==sp->qtable_offset[n])
-				{
-					TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JpegQTables tag value");
-					return(0);
-				}
-			}
-			oa=sizeof(uint32)+69;
-			ob=_TIFFmalloc(oa);
-			if (ob==0)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-				return(0);
-			}
-			*(uint32*)ob=oa;
-			ob[sizeof(uint32)]=255;
-			ob[sizeof(uint32)+1]=JPEG_MARKER_DQT;
-			ob[sizeof(uint32)+2]=0;
-			ob[sizeof(uint32)+3]=67;
-			ob[sizeof(uint32)+4]=m;
-			TIFFSeekFile(tif,sp->qtable_offset[m],SEEK_SET);
-			p=TIFFReadFile(tif,&ob[sizeof(uint32)+5],64);
-			if (p!=64)
-				return(0);
-			sp->qtable[m]=ob;
-			sp->sof_tq[m]=m;
-		}
-		else
-			sp->sof_tq[m]=sp->sof_tq[m-1];
-	}
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecTablesDcTable(TIFF* tif)
-{
-	static const char module[]="OJPEGReadHeaderInfoSecTablesDcTable";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	uint8 n;
-	uint8 o[16];
-	uint32 p;
-	uint32 q;
-	uint32 ra;
-	uint8* rb;
-	if (sp->dctable_offset[0]==0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Missing JPEG tables");
-		return(0);
-	}
-	sp->in_buffer_file_pos_log=0;
-	for (m=0; m<sp->samples_per_pixel; m++)
-	{
-		if ((sp->dctable_offset[m]!=0) && ((m==0) || (sp->dctable_offset[m]!=sp->dctable_offset[m-1])))
-		{
-			for (n=0; n<m-1; n++)
-			{
-				if (sp->dctable_offset[m]==sp->dctable_offset[n])
-				{
-					TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JpegDcTables tag value");
-					return(0);
-				}
-			}
-			TIFFSeekFile(tif,sp->dctable_offset[m],SEEK_SET);
-			p=TIFFReadFile(tif,o,16);
-			if (p!=16)
-				return(0);
-			q=0;
-			for (n=0; n<16; n++)
-				q+=o[n];
-			ra=sizeof(uint32)+21+q;
-			rb=_TIFFmalloc(ra);
-			if (rb==0)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-				return(0);
-			}
-			*(uint32*)rb=ra;
-			rb[sizeof(uint32)]=255;
-			rb[sizeof(uint32)+1]=JPEG_MARKER_DHT;
-			rb[sizeof(uint32)+2]=((19+q)>>8);
-			rb[sizeof(uint32)+3]=((19+q)&255);
-			rb[sizeof(uint32)+4]=m;
-			for (n=0; n<16; n++)
-				rb[sizeof(uint32)+5+n]=o[n];
-			p=TIFFReadFile(tif,&(rb[sizeof(uint32)+21]),q);
-			if (p!=q)
-				return(0);
-			sp->dctable[m]=rb;
-			sp->sos_tda[m]=(m<<4);
-		}
-		else
-			sp->sos_tda[m]=sp->sos_tda[m-1];
-	}
-	return(1);
-}
-
-static int
-OJPEGReadHeaderInfoSecTablesAcTable(TIFF* tif)
-{
-	static const char module[]="OJPEGReadHeaderInfoSecTablesAcTable";
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	uint8 n;
-	uint8 o[16];
-	uint32 p;
-	uint32 q;
-	uint32 ra;
-	uint8* rb;
-	if (sp->actable_offset[0]==0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,module,"Missing JPEG tables");
-		return(0);
-	}
-	sp->in_buffer_file_pos_log=0;
-	for (m=0; m<sp->samples_per_pixel; m++)
-	{
-		if ((sp->actable_offset[m]!=0) && ((m==0) || (sp->actable_offset[m]!=sp->actable_offset[m-1])))
-		{
-			for (n=0; n<m-1; n++)
-			{
-				if (sp->actable_offset[m]==sp->actable_offset[n])
-				{
-					TIFFErrorExt(tif->tif_clientdata,module,"Corrupt JpegAcTables tag value");
-					return(0);
-				}
-			}
-			TIFFSeekFile(tif,sp->actable_offset[m],SEEK_SET);
-			p=TIFFReadFile(tif,o,16);
-			if (p!=16)
-				return(0);
-			q=0;
-			for (n=0; n<16; n++)
-				q+=o[n];
-			ra=sizeof(uint32)+21+q;
-			rb=_TIFFmalloc(ra);
-			if (rb==0)
-			{
-				TIFFErrorExt(tif->tif_clientdata,module,"Out of memory");
-				return(0);
-			}
-			*(uint32*)rb=ra;
-			rb[sizeof(uint32)]=255;
-			rb[sizeof(uint32)+1]=JPEG_MARKER_DHT;
-			rb[sizeof(uint32)+2]=((19+q)>>8);
-			rb[sizeof(uint32)+3]=((19+q)&255);
-			rb[sizeof(uint32)+4]=(16|m);
-			for (n=0; n<16; n++)
-				rb[sizeof(uint32)+5+n]=o[n];
-			p=TIFFReadFile(tif,&(rb[sizeof(uint32)+21]),q);
-			if (p!=q)
-				return(0);
-			sp->actable[m]=rb;
-			sp->sos_tda[m]=(sp->sos_tda[m]|m);
-		}
-		else
-			sp->sos_tda[m]=(sp->sos_tda[m]|(sp->sos_tda[m-1]&15));
-	}
-	return(1);
-}
-
-static int
-OJPEGReadBufferFill(OJPEGState* sp)
-{
-	uint16 m;
-	tsize_t n;
-	/* TODO: double-check: when subsamplingcorrect is set, no call to TIFFErrorExt or TIFFWarningExt should be made
-	 * in any other case, seek or read errors should be passed through */
-	do
-	{
-		if (sp->in_buffer_file_togo!=0)
-		{
-			if (sp->in_buffer_file_pos_log==0)
-			{
-				TIFFSeekFile(sp->tif,sp->in_buffer_file_pos,SEEK_SET);
-				sp->in_buffer_file_pos_log=1;
-			}
-			m=OJPEG_BUFFER;
-			if (m>sp->in_buffer_file_togo)
-				m=(uint16)sp->in_buffer_file_togo;
-			n=TIFFReadFile(sp->tif,sp->in_buffer,(tsize_t)m);
-			if (n==0)
-				return(0);
-			assert(n>0);
-			assert(n<=OJPEG_BUFFER);
-			assert(n<65536);
-			assert((uint16)n<=sp->in_buffer_file_togo);
-			m=(uint16)n;
-			sp->in_buffer_togo=m;
-			sp->in_buffer_cur=sp->in_buffer;
-			sp->in_buffer_file_togo-=m;
-			sp->in_buffer_file_pos+=m;
-			break;
-		}
-		sp->in_buffer_file_pos_log=0;
-		switch(sp->in_buffer_source)
-		{
-			case osibsNotSetYet:
-				if (sp->jpeg_interchange_format!=0)
-				{
-					sp->in_buffer_file_pos=sp->jpeg_interchange_format;
-					sp->in_buffer_file_togo=sp->jpeg_interchange_format_length;
-				}
-				sp->in_buffer_source=osibsJpegInterchangeFormat;
-				break;
-			case osibsJpegInterchangeFormat:
-				sp->in_buffer_source=osibsStrile;
-			case osibsStrile:
-				if (sp->in_buffer_next_strile==sp->in_buffer_strile_count)  
-					sp->in_buffer_source=osibsEof;
-				else
-				{
-					if (sp->tif->tif_dir.td_stripoffset == 0) {
-						TIFFErrorExt(sp->tif->tif_clientdata,sp->tif->tif_name,"Strip offsets are missing");
-						return(0);
-					}
-					sp->in_buffer_file_pos=sp->tif->tif_dir.td_stripoffset[sp->in_buffer_next_strile];  
-					if (sp->in_buffer_file_pos!=0)
-					{
-						if (sp->in_buffer_file_pos>=sp->file_size)
-							sp->in_buffer_file_pos=0;
-						else
-						{
-							sp->in_buffer_file_togo=sp->tif->tif_dir.td_stripbytecount[sp->in_buffer_next_strile];  
-							if (sp->in_buffer_file_togo==0)
-								sp->in_buffer_file_pos=0;
-							else if (sp->in_buffer_file_pos+sp->in_buffer_file_togo>sp->file_size)
-								sp->in_buffer_file_togo=sp->file_size-sp->in_buffer_file_pos;
-						}
-					}
-					sp->in_buffer_next_strile++;
-				}
-				break;
-			default:
-				return(0);
-		}
-	} while (1);
-	return(1);
-}
-
-static int
-OJPEGReadByte(OJPEGState* sp, uint8* byte)
-{
-	if (sp->in_buffer_togo==0)
-	{
-		if (OJPEGReadBufferFill(sp)==0)
-			return(0);
-		assert(sp->in_buffer_togo>0);
-	}
-	*byte=*(sp->in_buffer_cur);
-	sp->in_buffer_cur++;
-	sp->in_buffer_togo--;
-	return(1);
-}
-
-static int
-OJPEGReadBytePeek(OJPEGState* sp, uint8* byte)
-{
-	if (sp->in_buffer_togo==0)
-	{
-		if (OJPEGReadBufferFill(sp)==0)
-			return(0);
-		assert(sp->in_buffer_togo>0);
-	}
-	*byte=*(sp->in_buffer_cur);
-	return(1);
-}
-
-static void
-OJPEGReadByteAdvance(OJPEGState* sp)
-{
-	assert(sp->in_buffer_togo>0);
-	sp->in_buffer_cur++;
-	sp->in_buffer_togo--;
-}
-
-static int
-OJPEGReadWord(OJPEGState* sp, uint16* word)
-{
-	uint8 m;
-	if (OJPEGReadByte(sp,&m)==0)
-		return(0);
-	*word=(m<<8);
-	if (OJPEGReadByte(sp,&m)==0)
-		return(0);
-	*word|=m;
-	return(1);
-}
-
-static int
-OJPEGReadBlock(OJPEGState* sp, uint16 len, void* mem)
-{
-	uint16 mlen;
-	uint8* mmem;
-	uint16 n;
-	assert(len>0);
-	mlen=len;
-	mmem=mem;
-	do
-	{
-		if (sp->in_buffer_togo==0)
-		{
-			if (OJPEGReadBufferFill(sp)==0)
-				return(0);
-			assert(sp->in_buffer_togo>0);
-		}
-		n=mlen;
-		if (n>sp->in_buffer_togo)
-			n=sp->in_buffer_togo;
-		_TIFFmemcpy(mmem,sp->in_buffer_cur,n);
-		sp->in_buffer_cur+=n;
-		sp->in_buffer_togo-=n;
-		mlen-=n;
-		mmem+=n;
-	} while(mlen>0);
-	return(1);
-}
-
-static void
-OJPEGReadSkip(OJPEGState* sp, uint16 len)
-{
-	uint16 m;
-	uint16 n;
-	m=len;
-	n=m;
-	if (n>sp->in_buffer_togo)
-		n=sp->in_buffer_togo;
-	sp->in_buffer_cur+=n;
-	sp->in_buffer_togo-=n;
-	m-=n;
-	if (m>0)
-	{
-		assert(sp->in_buffer_togo==0);
-		n=m;
-		if (n>sp->in_buffer_file_togo)
-			n=sp->in_buffer_file_togo;
-		sp->in_buffer_file_pos+=n;
-		sp->in_buffer_file_togo-=n;
-		sp->in_buffer_file_pos_log=0;
-		/* we don't skip past jpeginterchangeformat/strile block...
-		 * if that is asked from us, we're dealing with totally bazurk
-		 * data anyway, and we've not seen this happening on any
-		 * testfile, so we might as well likely cause some other
-		 * meaningless error to be passed at some later time
-		 */
-	}
-}
-
-static int
-OJPEGWriteStream(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	*len=0;
-	do
-	{
-		assert(sp->out_state<=ososEoi);
-		switch(sp->out_state)
-		{
-			case ososSoi:
-				OJPEGWriteStreamSoi(tif,mem,len);
-				break;
-			case ososQTable0:
-				OJPEGWriteStreamQTable(tif,0,mem,len);
-				break;
-			case ososQTable1:
-				OJPEGWriteStreamQTable(tif,1,mem,len);
-				break;
-			case ososQTable2:
-				OJPEGWriteStreamQTable(tif,2,mem,len);
-				break;
-			case ososQTable3:
-				OJPEGWriteStreamQTable(tif,3,mem,len);
-				break;
-			case ososDcTable0:
-				OJPEGWriteStreamDcTable(tif,0,mem,len);
-				break;
-			case ososDcTable1:
-				OJPEGWriteStreamDcTable(tif,1,mem,len);
-				break;
-			case ososDcTable2:
-				OJPEGWriteStreamDcTable(tif,2,mem,len);
-				break;
-			case ososDcTable3:
-				OJPEGWriteStreamDcTable(tif,3,mem,len);
-				break;
-			case ososAcTable0:
-				OJPEGWriteStreamAcTable(tif,0,mem,len);
-				break;
-			case ososAcTable1:
-				OJPEGWriteStreamAcTable(tif,1,mem,len);
-				break;
-			case ososAcTable2:
-				OJPEGWriteStreamAcTable(tif,2,mem,len);
-				break;
-			case ososAcTable3:
-				OJPEGWriteStreamAcTable(tif,3,mem,len);
-				break;
-			case ososDri:
-				OJPEGWriteStreamDri(tif,mem,len);
-				break;
-			case ososSof:
-				OJPEGWriteStreamSof(tif,mem,len);
-				break;
-			case ososSos:
-				OJPEGWriteStreamSos(tif,mem,len);
-				break;
-			case ososCompressed:
-				if (OJPEGWriteStreamCompressed(tif,mem,len)==0)
-					return(0);
-				break;
-			case ososRst:
-				OJPEGWriteStreamRst(tif,mem,len);
-				break;
-			case ososEoi:
-				OJPEGWriteStreamEoi(tif,mem,len);
-				break;
-		}
-	} while (*len==0);
-	return(1);
-}
-
-static void
-OJPEGWriteStreamSoi(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	assert(OJPEG_BUFFER>=2);
-	sp->out_buffer[0]=255;
-	sp->out_buffer[1]=JPEG_MARKER_SOI;
-	*len=2;
-	*mem=(void*)sp->out_buffer;
-	sp->out_state++;
-}
-
-static void
-OJPEGWriteStreamQTable(TIFF* tif, uint8 table_index, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	if (sp->qtable[table_index]!=0)
-	{
-		*mem=(void*)(sp->qtable[table_index]+sizeof(uint32));
-		*len=*((uint32*)sp->qtable[table_index])-sizeof(uint32);
-	}
-	sp->out_state++;
-}
-
-static void
-OJPEGWriteStreamDcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	if (sp->dctable[table_index]!=0)
-	{
-		*mem=(void*)(sp->dctable[table_index]+sizeof(uint32));
-		*len=*((uint32*)sp->dctable[table_index])-sizeof(uint32);
-	}
-	sp->out_state++;
-}
-
-static void
-OJPEGWriteStreamAcTable(TIFF* tif, uint8 table_index, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	if (sp->actable[table_index]!=0)
-	{
-		*mem=(void*)(sp->actable[table_index]+sizeof(uint32));
-		*len=*((uint32*)sp->actable[table_index])-sizeof(uint32);
-	}
-	sp->out_state++;
-}
-
-static void
-OJPEGWriteStreamDri(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	assert(OJPEG_BUFFER>=6);
-	if (sp->restart_interval!=0)
-	{
-		sp->out_buffer[0]=255;
-		sp->out_buffer[1]=JPEG_MARKER_DRI;
-		sp->out_buffer[2]=0;
-		sp->out_buffer[3]=4;
-		sp->out_buffer[4]=(sp->restart_interval>>8);
-		sp->out_buffer[5]=(sp->restart_interval&255);
-		*len=6;
-		*mem=(void*)sp->out_buffer;
-	}
-	sp->out_state++;
-}
-
-static void
-OJPEGWriteStreamSof(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	assert(OJPEG_BUFFER>=2+8+sp->samples_per_pixel_per_plane*3);
-	assert(255>=8+sp->samples_per_pixel_per_plane*3);
-	sp->out_buffer[0]=255;
-	sp->out_buffer[1]=sp->sof_marker_id;
-	/* Lf */
-	sp->out_buffer[2]=0;
-	sp->out_buffer[3]=8+sp->samples_per_pixel_per_plane*3;
-	/* P */
-	sp->out_buffer[4]=8;
-	/* Y */
-	sp->out_buffer[5]=(sp->sof_y>>8);
-	sp->out_buffer[6]=(sp->sof_y&255);
-	/* X */
-	sp->out_buffer[7]=(sp->sof_x>>8);
-	sp->out_buffer[8]=(sp->sof_x&255);
-	/* Nf */
-	sp->out_buffer[9]=sp->samples_per_pixel_per_plane;
-	for (m=0; m<sp->samples_per_pixel_per_plane; m++)
-	{
-		/* C */
-		sp->out_buffer[10+m*3]=sp->sof_c[sp->plane_sample_offset+m];
-		/* H and V */
-		sp->out_buffer[10+m*3+1]=sp->sof_hv[sp->plane_sample_offset+m];
-		/* Tq */
-		sp->out_buffer[10+m*3+2]=sp->sof_tq[sp->plane_sample_offset+m];
-	}
-	*len=10+sp->samples_per_pixel_per_plane*3;
-	*mem=(void*)sp->out_buffer;
-	sp->out_state++;
-}
-
-static void
-OJPEGWriteStreamSos(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	uint8 m;
-	assert(OJPEG_BUFFER>=2+6+sp->samples_per_pixel_per_plane*2);
-	assert(255>=6+sp->samples_per_pixel_per_plane*2);
-	sp->out_buffer[0]=255;
-	sp->out_buffer[1]=JPEG_MARKER_SOS;
-	/* Ls */
-	sp->out_buffer[2]=0;
-	sp->out_buffer[3]=6+sp->samples_per_pixel_per_plane*2;
-	/* Ns */
-	sp->out_buffer[4]=sp->samples_per_pixel_per_plane;
-	for (m=0; m<sp->samples_per_pixel_per_plane; m++)
-	{
-		/* Cs */
-		sp->out_buffer[5+m*2]=sp->sos_cs[sp->plane_sample_offset+m];
-		/* Td and Ta */
-		sp->out_buffer[5+m*2+1]=sp->sos_tda[sp->plane_sample_offset+m];
-	}
-	/* Ss */
-	sp->out_buffer[5+sp->samples_per_pixel_per_plane*2]=0;
-	/* Se */
-	sp->out_buffer[5+sp->samples_per_pixel_per_plane*2+1]=63;
-	/* Ah and Al */
-	sp->out_buffer[5+sp->samples_per_pixel_per_plane*2+2]=0;
-	*len=8+sp->samples_per_pixel_per_plane*2;
-	*mem=(void*)sp->out_buffer;
-	sp->out_state++;
-}
-
-static int
-OJPEGWriteStreamCompressed(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	if (sp->in_buffer_togo==0)
-	{
-		if (OJPEGReadBufferFill(sp)==0)
-			return(0);
-		assert(sp->in_buffer_togo>0);
-	}
-	*len=sp->in_buffer_togo;
-	*mem=(void*)sp->in_buffer_cur;
-	sp->in_buffer_togo=0;
-	if (sp->in_buffer_file_togo==0)
-	{
-		switch(sp->in_buffer_source)
-		{
-			case osibsStrile:
-				if (sp->in_buffer_next_strile<sp->in_buffer_strile_count)  
-					sp->out_state=ososRst;
-				else
-					sp->out_state=ososEoi;
-				break;
-			case osibsEof:
-				sp->out_state=ososEoi;
-				break;
-			default:
-				break;
-		}
-	}
-	return(1);
-}
-
-static void
-OJPEGWriteStreamRst(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	assert(OJPEG_BUFFER>=2);
-	sp->out_buffer[0]=255;
-	sp->out_buffer[1]=JPEG_MARKER_RST0+sp->restart_index;
-	sp->restart_index++;
-	if (sp->restart_index==8)
-		sp->restart_index=0;
-	*len=2;
-	*mem=(void*)sp->out_buffer;
-	sp->out_state=ososCompressed;
-}
-
-static void
-OJPEGWriteStreamEoi(TIFF* tif, void** mem, uint32* len)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	assert(OJPEG_BUFFER>=2);
-	sp->out_buffer[0]=255;
-	sp->out_buffer[1]=JPEG_MARKER_EOI;
-	*len=2;
-	*mem=(void*)sp->out_buffer;
-}
-
-#ifndef LIBJPEG_ENCAP_EXTERNAL
-static int
-jpeg_create_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo)
-{
-	return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_create_decompress(cinfo),1));
-}
-#endif
-
-#ifndef LIBJPEG_ENCAP_EXTERNAL
-static int
-jpeg_read_header_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, uint8 require_image)
-{
-	return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_read_header(cinfo,require_image),1));
-}
-#endif
-
-#ifndef LIBJPEG_ENCAP_EXTERNAL
-static int
-jpeg_start_decompress_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo)
-{
-	return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_start_decompress(cinfo),1));
-}
-#endif
-
-#ifndef LIBJPEG_ENCAP_EXTERNAL
-static int
-jpeg_read_scanlines_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* scanlines, uint32 max_lines)
-{
-	return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_read_scanlines(cinfo,scanlines,max_lines),1));
-}
-#endif
-
-#ifndef LIBJPEG_ENCAP_EXTERNAL
-static int
-jpeg_read_raw_data_encap(OJPEGState* sp, jpeg_decompress_struct* cinfo, void* data, uint32 max_lines)
-{
-	return(SETJMP(sp->exit_jmpbuf)?0:(jpeg_read_raw_data(cinfo,data,max_lines),1));
-}
-#endif
-
-#ifndef LIBJPEG_ENCAP_EXTERNAL
-static void
-jpeg_encap_unwind(TIFF* tif)
-{
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	LONGJMP(sp->exit_jmpbuf,1);
-}
-#endif
-
-static void
-OJPEGLibjpegJpegErrorMgrOutputMessage(jpeg_common_struct* cinfo)
-{
-	char buffer[JMSG_LENGTH_MAX];
-	(*cinfo->err->format_message)(cinfo,buffer);
-	TIFFWarningExt(((TIFF*)(cinfo->client_data))->tif_clientdata,"LibJpeg", "%s", buffer);
-}
-
-static void
-OJPEGLibjpegJpegErrorMgrErrorExit(jpeg_common_struct* cinfo)
-{
-	char buffer[JMSG_LENGTH_MAX];
-	(*cinfo->err->format_message)(cinfo,buffer);
-	TIFFErrorExt(((TIFF*)(cinfo->client_data))->tif_clientdata,"LibJpeg", "%s", buffer);
-	jpeg_encap_unwind((TIFF*)(cinfo->client_data));
-}
-
-static void
-OJPEGLibjpegJpegSourceMgrInitSource(jpeg_decompress_struct* cinfo)
-{
-	(void)cinfo;
-}
-
-static boolean
-OJPEGLibjpegJpegSourceMgrFillInputBuffer(jpeg_decompress_struct* cinfo)
-{
-	TIFF* tif=(TIFF*)cinfo->client_data;
-	OJPEGState* sp=(OJPEGState*)tif->tif_data;
-	void* mem=0;
-	uint32 len=0;
-	if (OJPEGWriteStream(tif,&mem,&len)==0)
-	{
-		TIFFErrorExt(tif->tif_clientdata,"LibJpeg","Premature end of JPEG data");
-		jpeg_encap_unwind(tif);
-	}
-	sp->libjpeg_jpeg_source_mgr.bytes_in_buffer=len;
-	sp->libjpeg_jpeg_source_mgr.next_input_byte=mem;
-	return(1);
-}
-
-static void
-OJPEGLibjpegJpegSourceMgrSkipInputData(jpeg_decompress_struct* cinfo, long num_bytes)
-{
-	TIFF* tif=(TIFF*)cinfo->client_data;
-	(void)num_bytes;
-	TIFFErrorExt(tif->tif_clientdata,"LibJpeg","Unexpected error");
-	jpeg_encap_unwind(tif);
-}
-
-static boolean
-OJPEGLibjpegJpegSourceMgrResyncToRestart(jpeg_decompress_struct* cinfo, int desired)
-{
-	TIFF* tif=(TIFF*)cinfo->client_data;
-	(void)desired;
-	TIFFErrorExt(tif->tif_clientdata,"LibJpeg","Unexpected error");
-	jpeg_encap_unwind(tif);
-	return(0);
-}
-
-static void
-OJPEGLibjpegJpegSourceMgrTermSource(jpeg_decompress_struct* cinfo)
-{
-	(void)cinfo;
-}
-
-#endif
-
-
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 8
- * fill-column: 78
- * End:
- */