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Diffstat (limited to 'tiff/libtiff/tif_ojpeg.c')
| -rwxr-xr-x | tiff/libtiff/tif_ojpeg.c | 2501 |
1 files changed, 2501 insertions, 0 deletions
diff --git a/tiff/libtiff/tif_ojpeg.c b/tiff/libtiff/tif_ojpeg.c new file mode 100755 index 0000000..61f4221 --- /dev/null +++ b/tiff/libtiff/tif_ojpeg.c @@ -0,0 +1,2501 @@ +/* $Id: tif_ojpeg.c,v 1.58 2014-12-25 18:29:11 erouault 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 + development. 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. +*/ + +#define WIN32_LEAN_AND_MEAN +#define VC_EXTRALEAN + +#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 accommodate 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) + +static const TIFFField ojpegFields[] = { + {TIFFTAG_JPEGIFOFFSET,1,1,TIFF_LONG8,0,TIFF_SETGET_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGINTERCHANGEFORMAT,TRUE,FALSE,"JpegInterchangeFormat",NULL}, + {TIFFTAG_JPEGIFBYTECOUNT,1,1,TIFF_LONG8,0,TIFF_SETGET_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH,TRUE,FALSE,"JpegInterchangeFormatLength",NULL}, + {TIFFTAG_JPEGQTABLES,TIFF_VARIABLE2,TIFF_VARIABLE2,TIFF_LONG8,0,TIFF_SETGET_C32_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGQTABLES,FALSE,TRUE,"JpegQTables",NULL}, + {TIFFTAG_JPEGDCTABLES,TIFF_VARIABLE2,TIFF_VARIABLE2,TIFF_LONG8,0,TIFF_SETGET_C32_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGDCTABLES,FALSE,TRUE,"JpegDcTables",NULL}, + {TIFFTAG_JPEGACTABLES,TIFF_VARIABLE2,TIFF_VARIABLE2,TIFF_LONG8,0,TIFF_SETGET_C32_UINT64,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGACTABLES,FALSE,TRUE,"JpegAcTables",NULL}, + {TIFFTAG_JPEGPROC,1,1,TIFF_SHORT,0,TIFF_SETGET_UINT16,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGPROC,FALSE,FALSE,"JpegProc",NULL}, + {TIFFTAG_JPEGRESTARTINTERVAL,1,1,TIFF_SHORT,0,TIFF_SETGET_UINT16,TIFF_SETGET_UNDEFINED,FIELD_OJPEG_JPEGRESTARTINTERVAL,FALSE,FALSE,"JpegRestartInterval",NULL}, +}; + +#ifndef LIBJPEG_ENCAP_EXTERNAL +#include <setjmp.h> +#endif + +/* We undefine FAR to avoid conflict with JPEG definition */ + +#ifdef FAR +#undef FAR +#endif + +/* + Libjpeg's jmorecfg.h defines INT16 and INT32, but only if XMD_H is + not defined. Unfortunately, the MinGW and Borland compilers include + a typedef for INT32, which causes a conflict. MSVC does not include + a conficting typedef given the headers which are included. +*/ +#if defined(__BORLANDC__) || defined(__MINGW32__) +# define XMD_H 1 +#endif + +/* Define "boolean" as unsigned char, not int, per Windows custom. */ +#if defined(__WIN32__) && !defined(__MINGW32__) +# ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */ + typedef unsigned char boolean; +# endif +# define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */ +#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; + TIFFPrintMethod printdir; + uint64 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; + uint64 jpeg_interchange_format; + uint64 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; + uint64 qtable_offset[3]; + uint64 dctable_offset[3]; + uint64 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; + uint32 in_buffer_next_strile; + uint64 in_buffer_file_pos; + uint64 in_buffer_file_togo; + } sos_end[3]; + uint8 readheader_done; + uint8 writeheader_done; + uint16 write_cursample; + uint32 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; + uint32 in_buffer_next_strile; + uint32 in_buffer_strile_count; + uint64 in_buffer_file_pos; + uint8 in_buffer_file_pos_log; + uint64 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, uint32 tag, va_list ap); +static int OJPEGVSetField(TIFF* tif, uint32 tag, va_list ap); +static void OJPEGPrintDir(TIFF* tif, FILE* fd, long flags); + +static int OJPEGFixupTags(TIFF* tif); +static int OJPEGSetupDecode(TIFF* tif); +static int OJPEGPreDecode(TIFF* tif, uint16 s); +static int OJPEGPreDecodeSkipRaw(TIFF* tif); +static int OJPEGPreDecodeSkipScanlines(TIFF* tif); +static int OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s); +static int OJPEGDecodeRaw(TIFF* tif, uint8* buf, tmsize_t cc); +static int OJPEGDecodeScanlines(TIFF* tif, uint8* buf, tmsize_t cc); +static void OJPEGPostDecode(TIFF* tif, uint8* buf, tmsize_t cc); +static int OJPEGSetupEncode(TIFF* tif); +static int OJPEGPreEncode(TIFF* tif, uint16 s); +static int OJPEGEncode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 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, uint16 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 (!_TIFFMergeFields(tif, ojpegFields, TIFFArrayCount(ojpegFields))) { + 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_fixuptags=OJPEGFixupTags; + 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=(uint8*)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; + sp->printdir=tif->tif_tagmethods.printdir; + 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, uint32 tag, va_list ap) +{ + OJPEGState* sp=(OJPEGState*)tif->tif_data; + switch(tag) + { + case TIFFTAG_JPEGIFOFFSET: + *va_arg(ap,uint64*)=(uint64)sp->jpeg_interchange_format; + break; + case TIFFTAG_JPEGIFBYTECOUNT: + *va_arg(ap,uint64*)=(uint64)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, uint32 tag, va_list ap) +{ + static const char module[]="OJPEGVSetField"; + OJPEGState* sp=(OJPEGState*)tif->tif_data; + uint32 ma; + uint64* mb; + uint32 n; + const TIFFField* fip; + + switch(tag) + { + case TIFFTAG_JPEGIFOFFSET: + sp->jpeg_interchange_format=(uint64)va_arg(ap,uint64); + break; + case TIFFTAG_JPEGIFBYTECOUNT: + sp->jpeg_interchange_format_length=(uint64)va_arg(ap,uint64); + break; + case TIFFTAG_YCBCRSUBSAMPLING: + sp->subsampling_tag=1; + sp->subsampling_hor=(uint8)va_arg(ap,uint16_vap); + sp->subsampling_ver=(uint8)va_arg(ap,uint16_vap); + tif->tif_dir.td_ycbcrsubsampling[0]=sp->subsampling_hor; + tif->tif_dir.td_ycbcrsubsampling[1]=sp->subsampling_ver; + break; + case TIFFTAG_JPEGQTABLES: + ma=(uint32)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=(uint64*)va_arg(ap,uint64*); + for (n=0; n<ma; n++) + sp->qtable_offset[n]=mb[n]; + } + break; + case TIFFTAG_JPEGDCTABLES: + ma=(uint32)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=(uint64*)va_arg(ap,uint64*); + for (n=0; n<ma; n++) + sp->dctable_offset[n]=mb[n]; + } + break; + case TIFFTAG_JPEGACTABLES: + ma=(uint32)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=(uint64*)va_arg(ap,uint64*); + for (n=0; n<ma; n++) + sp->actable_offset[n]=mb[n]; + } + break; + case TIFFTAG_JPEGPROC: + sp->jpeg_proc=(uint8)va_arg(ap,uint16_vap); + break; + case TIFFTAG_JPEGRESTARTINTERVAL: + sp->restart_interval=(uint16)va_arg(ap,uint16_vap); + break; + default: + return (*sp->vsetparent)(tif,tag,ap); + } + fip = TIFFFieldWithTag(tif,tag); + if( fip == NULL ) /* shouldn't happen */ + return(0); + TIFFSetFieldBit(tif,fip->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: " TIFF_UINT64_FORMAT "\n",(TIFF_UINT64_T)sp->jpeg_interchange_format); + if (TIFFFieldSet(tif,FIELD_OJPEG_JPEGINTERCHANGEFORMATLENGTH)) + fprintf(fd," JpegInterchangeFormatLength: " TIFF_UINT64_FORMAT "\n",(TIFF_UINT64_T)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," " TIFF_UINT64_FORMAT,(TIFF_UINT64_T)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," " TIFF_UINT64_FORMAT,(TIFF_UINT64_T)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," " TIFF_UINT64_FORMAT,(TIFF_UINT64_T)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); + if (sp->printdir) + (*sp->printdir)(tif, fd, flags); +} + +static int +OJPEGFixupTags(TIFF* tif) +{ + (void) tif; + return(1); +} + +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, uint16 s) +{ + OJPEGState* sp=(OJPEGState*)tif->tif_data; + uint32 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=tif->tif_curtile; + else + m=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=(uint8)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, uint8* buf, tmsize_t cc, uint16 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, uint8* buf, tmsize_t cc) +{ + static const char module[]="OJPEGDecodeRaw"; + OJPEGState* sp=(OJPEGState*)tif->tif_data; + uint8* m; + tmsize_t 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, uint8* buf, tmsize_t cc) +{ + static const char module[]="OJPEGDecodeScanlines"; + OJPEGState* sp=(OJPEGState*)tif->tif_data; + uint8* m; + tmsize_t 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, uint8* buf, tmsize_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, uint16 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, uint8* buf, tmsize_t cc, uint16 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; + tif->tif_tagmethods.printdir=sp->printdir; + 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; + _TIFFFillStriles( tif ); + + 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; + } + if (tif->tif_dir.td_samplesperpixel==1) + { + 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 (tif->tif_dir.td_samplesperpixel!=3) + { + TIFFErrorExt(tif->tif_clientdata,module,"SamplesPerPixel %d not supported for this compression scheme",sp->samples_per_pixel); + return(0); + } + sp->samples_per_pixel=3; + 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, uint16 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; + /* if a previous attempt failed, don't try again */ + if (sp->libjpeg_session_active != 0) + return 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) { + _TIFFfree(nb); + return(0); + } + o=nb[sizeof(uint32)+4]&15; + if (3<o) + { + TIFFErrorExt(tif->tif_clientdata,module,"Corrupt DQT marker in JPEG data"); + _TIFFfree(nb); + 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 + { + /* Y: Number of lines */ + if (OJPEGReadWord(sp,&p)==0) + return(0); + if (((uint32)p<sp->image_length) && ((uint32)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 (((uint32)p<sp->image_width) && ((uint32)p<sp->strile_width)) + { + TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data indicates unexpected width"); + return(0); + } + if ((uint32)p>sp->strile_width) + { + TIFFErrorExt(tif->tif_clientdata,module,"JPEG compressed data image width exceeds expected image 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; + tmsize_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 ((uint64)m>sp->in_buffer_file_togo) + m=(uint16)sp->in_buffer_file_togo; + n=TIFFReadFile(sp->tif,sp->in_buffer,(tmsize_t)m); + if (n==0) + return(0); + assert(n>0); + assert(n<=OJPEG_BUFFER); + assert(n<65536); + assert((uint64)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 (!_TIFFFillStriles( sp->tif ) + || sp->tif->tif_dir.td_stripoffset == NULL + || sp->tif->tif_dir.td_stripbytecount == NULL) + return 0; + + if (sp->in_buffer_next_strile==sp->in_buffer_strile_count) + sp->in_buffer_source=osibsEof; + else + { + 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 if (sp->tif->tif_dir.td_stripbytecount==NULL) + sp->in_buffer_file_togo=sp->file_size-sp->in_buffer_file_pos; + else + { + if (sp->tif->tif_dir.td_stripbytecount == 0) { + TIFFErrorExt(sp->tif->tif_clientdata,sp->tif->tif_name,"Strip byte counts are missing"); + return(0); + } + 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 ((uint64)n>sp->in_buffer_file_togo) + n=(uint16)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=0U; + 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: + */ |