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Diffstat (limited to 'src/libtiff/tif_ojpeg.c')
| -rw-r--r-- | src/libtiff/tif_ojpeg.c | 4926 |
1 files changed, 2564 insertions, 2362 deletions
diff --git a/src/libtiff/tif_ojpeg.c b/src/libtiff/tif_ojpeg.c index 0c876cd..fb6d2a2 100644 --- a/src/libtiff/tif_ojpeg.c +++ b/src/libtiff/tif_ojpeg.c @@ -1,2427 +1,2629 @@ -/* $Id: tif_ojpeg.c,v 1.3 2009/12/11 15:17:41 scuri 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. -*/ - +/* $Id: tif_ojpeg.c,v 1.4 2010/01/26 15:56:36 scuri Exp $ */ #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 +/* JPEG Compression support, as per the original TIFF 6.0 specification. + + WARNING: KLUDGE ALERT! 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 is an unsupported hack + that was created solely in order to read (but NOT write!) a few old, + unconverted images still present on some users' computer systems. The code + isn't pretty or robust, and it won't read every "old format" JPEG-in-TIFF + file (see Samuel Leffler's draft "TIFF Technical Note No. 2" for a long and + incomplete list of known problems), but it seems to work well enough in the + few cases of practical interest to the author; so, "caveat emptor"! This + file should NEVER be enhanced to write new images using anything other than + the latest approved JPEG-in-TIFF encapsulation method, implemented by the + "tif_jpeg.c" file elsewhere in this library. + + This file interfaces with Release 6B of the JPEG Library written by theu + Independent JPEG Group, which you can find on the Internet at: + ftp://ftp.uu.net:/graphics/jpeg/. + + The "C" Preprocessor macros, "[CD]_LOSSLESS_SUPPORTED", are defined by your + JPEG Library Version 6B only if you have applied a (massive!) patch by Ken + Murchison of Oceana Matrix Ltd. <ken@oceana.com> to support lossless Huffman + encoding (TIFF "JPEGProc" tag value = 14). This patch can be found on the + Internet at: ftp://ftp.oceana.com/pub/ljpeg-6b.tar.gz. + + Some old files produced by the Wang Imaging application for Microsoft Windows + apparently can be decoded only with a special patch to the JPEG Library, + which defines a subroutine named "jpeg_reset_huff_decode()" in its "jdhuff.c" + module (the "jdshuff.c" module, if Ken Murchison's patch has been applied). + Unfortunately the patch differs slightly in each case, and some TIFF Library + have reported problems finding the code, so both versions appear below; you + should carefully extract and apply only the version that applies to your JPEG + Library! + + Contributed by Scott Marovich <marovich@hpl.hp.com> with considerable help + from Charles Auer <Bumble731@msn.com> to unravel the mysteries of image files + created by the Wang Imaging application for Microsoft Windows. +*/ +#if 0 /* Patch for JPEG Library WITHOUT lossless Huffman coding */ +*** jdhuff.c.orig Mon Oct 20 17:51:10 1997 +--- jdhuff.c Sun Nov 11 17:33:58 2001 +*************** +*** 648,651 **** +--- 648,683 ---- + for (i = 0; i < NUM_HUFF_TBLS; i++) { + entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL; + } + } ++ ++ /* ++ * BEWARE OF KLUDGE: This subroutine is a hack for decoding illegal JPEG-in- ++ * TIFF encapsulations produced by Microsoft's Wang Imaging ++ * for Windows application with the public-domain TIFF Library. Based upon an ++ * examination of selected output files, this program apparently divides a JPEG ++ * bit-stream into consecutive horizontal TIFF "strips", such that the JPEG ++ * encoder's/decoder's DC coefficients for each image component are reset before ++ * each "strip". Moreover, a "strip" is not necessarily encoded in a multiple ++ * of 8 bits, so one must sometimes discard 1-7 bits at the end of each "strip" ++ * for alignment to the next input-Byte storage boundary. IJG JPEG Library ++ * decoder state is not normally exposed to client applications, so this sub- ++ * routine provides the TIFF Library with a "hook" to make these corrections. ++ * It should be called after "jpeg_start_decompress()" and before ++ * "jpeg_finish_decompress()", just before decoding each "strip" using ++ * "jpeg_read_raw_data()" or "jpeg_read_scanlines()". ++ * ++ * This kludge is not sanctioned or supported by the Independent JPEG Group, and ++ * future changes to the IJG JPEG Library might invalidate it. Do not send bug ++ * reports about this code to IJG developers. Instead, contact the author for ++ * advice: Scott B. Marovich <marovich@hpl.hp.com>, Hewlett-Packard Labs, 6/01. ++ */ ++ GLOBAL(void) ++ jpeg_reset_huff_decode (register j_decompress_ptr cinfo) ++ { register huff_entropy_ptr entropy = (huff_entropy_ptr)cinfo->entropy; ++ register int ci = 0; ++ ++ /* Discard encoded input bits, up to the next Byte boundary */ ++ entropy->bitstate.bits_left &= ~7; ++ /* Re-initialize DC predictions to 0 */ ++ do entropy->saved.last_dc_val[ci] = 0; while (++ci < cinfo->comps_in_scan); ++ } +#endif /* Patch for JPEG Library WITHOUT lossless Huffman coding */ +#if 0 /* Patch for JPEG Library WITH lossless Huffman coding */ +*** jdshuff.c.orig Mon Mar 11 16:44:54 2002 +--- jdshuff.c Mon Mar 11 16:44:54 2002 +*************** +*** 357,360 **** +--- 357,393 ---- + for (i = 0; i < NUM_HUFF_TBLS; i++) { + entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL; + } + } ++ ++ /* ++ * BEWARE OF KLUDGE: This subroutine is a hack for decoding illegal JPEG-in- ++ * TIFF encapsulations produced by Microsoft's Wang Imaging ++ * for Windows application with the public-domain TIFF Library. Based upon an ++ * examination of selected output files, this program apparently divides a JPEG ++ * bit-stream into consecutive horizontal TIFF "strips", such that the JPEG ++ * encoder's/decoder's DC coefficients for each image component are reset before ++ * each "strip". Moreover, a "strip" is not necessarily encoded in a multiple ++ * of 8 bits, so one must sometimes discard 1-7 bits at the end of each "strip" ++ * for alignment to the next input-Byte storage boundary. IJG JPEG Library ++ * decoder state is not normally exposed to client applications, so this sub- ++ * routine provides the TIFF Library with a "hook" to make these corrections. ++ * It should be called after "jpeg_start_decompress()" and before ++ * "jpeg_finish_decompress()", just before decoding each "strip" using ++ * "jpeg_read_raw_data()" or "jpeg_read_scanlines()". ++ * ++ * This kludge is not sanctioned or supported by the Independent JPEG Group, and ++ * future changes to the IJG JPEG Library might invalidate it. Do not send bug ++ * reports about this code to IJG developers. Instead, contact the author for ++ * advice: Scott B. Marovich <marovich@hpl.hp.com>, Hewlett-Packard Labs, 6/01. ++ */ ++ GLOBAL(void) ++ jpeg_reset_huff_decode (register j_decompress_ptr cinfo) ++ { register shuff_entropy_ptr entropy = (shuff_entropy_ptr) ++ ((j_lossy_d_ptr)cinfo->codec)->entropy_private; ++ register int ci = 0; ++ ++ /* Discard encoded input bits, up to the next Byte boundary */ ++ entropy->bitstate.bits_left &= ~7; ++ /* Re-initialize DC predictions to 0 */ ++ do entropy->saved.last_dc_val[ci] = 0; while (++ci < cinfo->comps_in_scan); ++ } +#endif /* Patch for JPEG Library WITH lossless Huffman coding */ #include <setjmp.h> +#include <stdio.h> +#ifdef FAR +#undef FAR /* Undefine FAR to avoid conflict with JPEG definition */ #endif - +#define JPEG_INTERNALS /* Include "jpegint.h" for "DSTATE_*" symbols */ +#define JPEG_CJPEG_DJPEG /* Include all Version 6B+ "jconfig.h" options */ +#undef INLINE #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; +#undef JPEG_CJPEG_DJPEG +#undef JPEG_INTERNALS -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 +/* Hack for files produced by Wang Imaging application on Microsoft Windows */ +extern void jpeg_reset_huff_decode(j_decompress_ptr); -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); +/* On some machines, it may be worthwhile to use "_setjmp()" or "sigsetjmp()" + instead of "setjmp()". These macros make it easier: +*/ +#define SETJMP(jbuf)setjmp(jbuf) +#define LONGJMP(jbuf,code)longjmp(jbuf,code) +#define JMP_BUF jmp_buf -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; - } +#define TIFFTAG_WANG_PAGECONTROL 32934 - /* 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); -} +/* Bit-vector offsets for keeping track of TIFF records that we've parsed. */ -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); -} +#define FIELD_JPEGPROC FIELD_CODEC +#define FIELD_JPEGIFOFFSET (FIELD_CODEC+1) +#define FIELD_JPEGIFBYTECOUNT (FIELD_CODEC+2) +#define FIELD_JPEGRESTARTINTERVAL (FIELD_CODEC+3) +#define FIELD_JPEGTABLES (FIELD_CODEC+4) /* New, post-6.0 JPEG-in-TIFF tag! */ +#define FIELD_JPEGLOSSLESSPREDICTORS (FIELD_CODEC+5) +#define FIELD_JPEGPOINTTRANSFORM (FIELD_CODEC+6) +#define FIELD_JPEGQTABLES (FIELD_CODEC+7) +#define FIELD_JPEGDCTABLES (FIELD_CODEC+8) +#define FIELD_JPEGACTABLES (FIELD_CODEC+9) +#define FIELD_WANG_PAGECONTROL (FIELD_CODEC+10) +#define FIELD_JPEGCOLORMODE (FIELD_CODEC+11) -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); -} +typedef struct jpeg_destination_mgr jpeg_destination_mgr; +typedef struct jpeg_source_mgr jpeg_source_mgr; +typedef struct jpeg_error_mgr jpeg_error_mgr; +/* State variable for each open TIFF file that uses "libjpeg" for JPEG + decompression. (Note: This file should NEVER perform JPEG compression + except in the manner implemented by the "tif_jpeg.c" file, elsewhere in this + library; see comments above.) JPEG Library internal state is recorded in a + "jpeg_{de}compress_struct", while a "jpeg_common_struct" records a few items + common to both compression and expansion. The "cinfo" field containing JPEG + Library state MUST be the 1st member of our own state variable, so that we + can safely "cast" pointers back and forth. +*/ +typedef struct /* This module's private, per-image state variable */ + { + union /* JPEG Library state variable; this MUST be our 1st field! */ + { + struct jpeg_compress_struct c; + struct jpeg_decompress_struct d; + struct jpeg_common_struct comm; + } cinfo; + jpeg_error_mgr err; /* JPEG Library error manager */ + JMP_BUF exit_jmpbuf; /* ...for catching JPEG Library failures */ +# ifdef never + + /* (The following two fields could be a "union", but they're small enough that + it's not worth the effort.) + */ + jpeg_destination_mgr dest; /* Destination for compressed data */ +# endif + jpeg_source_mgr src; /* Source of expanded data */ + JSAMPARRAY ds_buffer[MAX_COMPONENTS]; /* ->Temporary downsampling buffers */ + TIFF *tif; /* Reverse pointer, needed by some code */ + TIFFVGetMethod vgetparent; /* "Super class" methods... */ + TIFFVSetMethod vsetparent; + TIFFStripMethod defsparent; + TIFFTileMethod deftparent; + void *jpegtables; /* ->"New" JPEG tables, if we synthesized any */ + uint32 is_WANG, /* <=> Wang Imaging for Microsoft Windows output file? */ + jpegtables_length; /* Length of "new" JPEG tables, if they exist */ + tsize_t bytesperline; /* No. of decompressed Bytes per scan line */ + int jpegquality, /* Compression quality level */ + jpegtablesmode, /* What to put in JPEGTables */ + samplesperclump, + scancount; /* No. of scan lines accumulated */ + J_COLOR_SPACE photometric; /* IJG JPEG Library's photometry code */ + unsigned char h_sampling, /* Luminance sampling factors */ + v_sampling, + jpegcolormode; /* Who performs RGB <-> YCbCr conversion? */ + /* JPEGCOLORMODE_RAW <=> TIFF Library or its client */ + /* JPEGCOLORMODE_RGB <=> JPEG Library */ + /* These fields are added to support TIFFGetField */ + uint16 jpegproc; + uint32 jpegifoffset; + uint32 jpegifbytecount; + uint32 jpegrestartinterval; + void* jpeglosslesspredictors; + uint16 jpeglosslesspredictors_length; + void* jpegpointtransform; + uint32 jpegpointtransform_length; + void* jpegqtables; + uint32 jpegqtables_length; + void* jpegdctables; + uint32 jpegdctables_length; + void* jpegactables; + uint32 jpegactables_length; + + } OJPEGState; +#define OJState(tif)((OJPEGState*)(tif)->tif_data) + +static const TIFFFieldInfo ojpegFieldInfo[]=/* JPEG-specific TIFF-record tags */ + { + + /* This is the current JPEG-in-TIFF metadata-encapsulation tag, and its + treatment in this file is idiosyncratic. It should never appear in a + "source" image conforming to the TIFF Version 6.0 specification, so we + arrange to report an error if it appears. But in order to support possible + future conversion of "old" JPEG-in-TIFF encapsulations to "new" ones, we + might wish to synthesize an equivalent value to be returned by the TIFF + Library's "getfield" method. So, this table tells the TIFF Library to pass + these records to us in order to filter them below. + */ + { + TIFFTAG_JPEGTABLES ,TIFF_VARIABLE2,TIFF_VARIABLE2, + TIFF_UNDEFINED,FIELD_JPEGTABLES ,FALSE,TRUE ,"JPEGTables" + }, + + /* These tags are defined by the TIFF Version 6.0 specification and are now + obsolete. This module reads them from an old "source" image, but it never + writes them to a new "destination" image. + */ + { + TIFFTAG_JPEGPROC ,1 ,1 , + TIFF_SHORT ,FIELD_JPEGPROC ,FALSE,FALSE,"JPEGProc" + }, + { + TIFFTAG_JPEGIFOFFSET ,1 ,1 , + TIFF_LONG ,FIELD_JPEGIFOFFSET ,FALSE,FALSE,"JPEGInterchangeFormat" + }, + { + TIFFTAG_JPEGIFBYTECOUNT ,1 ,1 , + TIFF_LONG ,FIELD_JPEGIFBYTECOUNT ,FALSE,FALSE,"JPEGInterchangeFormatLength" + }, + { + TIFFTAG_JPEGRESTARTINTERVAL ,1 ,1 , + TIFF_SHORT ,FIELD_JPEGRESTARTINTERVAL ,FALSE,FALSE,"JPEGRestartInterval" + }, + { + TIFFTAG_JPEGLOSSLESSPREDICTORS,TIFF_VARIABLE,TIFF_VARIABLE, + TIFF_SHORT ,FIELD_JPEGLOSSLESSPREDICTORS,FALSE,TRUE ,"JPEGLosslessPredictors" + }, + { + TIFFTAG_JPEGPOINTTRANSFORM ,TIFF_VARIABLE,TIFF_VARIABLE, + TIFF_SHORT ,FIELD_JPEGPOINTTRANSFORM ,FALSE,TRUE ,"JPEGPointTransforms" + }, + { + TIFFTAG_JPEGQTABLES ,TIFF_VARIABLE,TIFF_VARIABLE, + TIFF_LONG ,FIELD_JPEGQTABLES ,FALSE,TRUE ,"JPEGQTables" + }, + { + TIFFTAG_JPEGDCTABLES ,TIFF_VARIABLE,TIFF_VARIABLE, + TIFF_LONG ,FIELD_JPEGDCTABLES ,FALSE,TRUE ,"JPEGDCTables" + }, + { + TIFFTAG_JPEGACTABLES ,TIFF_VARIABLE,TIFF_VARIABLE, + TIFF_LONG ,FIELD_JPEGACTABLES ,FALSE,TRUE ,"JPEGACTables" + }, + { + TIFFTAG_WANG_PAGECONTROL ,TIFF_VARIABLE,1 , + TIFF_LONG ,FIELD_WANG_PAGECONTROL ,FALSE,FALSE,"WANG PageControl" + }, + + /* This is a pseudo tag intended for internal use only by the TIFF Library and + its clients, which should never appear in an input/output image file. It + specifies whether the TIFF Library (or its client) should do YCbCr <-> RGB + color-space conversion (JPEGCOLORMODE_RAW <=> 0) or whether we should ask + the JPEG Library to do it (JPEGCOLORMODE_RGB <=> 1). + */ + { + TIFFTAG_JPEGCOLORMODE ,0 ,0 , + TIFF_ANY ,FIELD_PSEUDO ,FALSE,FALSE,"JPEGColorMode" + } + }; +static const char JPEGLib_name[]={"JPEG Library"}, + bad_bps[]={"%u BitsPerSample not allowed for JPEG"}, + bad_photometry[]={"PhotometricInterpretation %u not allowed for JPEG"}, + bad_subsampling[]={"invalid YCbCr subsampling factor(s)"}, +# ifdef never + no_write_frac[]={"fractional scan line discarded"}, +# endif + no_read_frac[]={"fractional scan line not read"}, + no_jtable_space[]={"No space for JPEGTables"}; + +/* The following diagnostic subroutines interface with and replace default + subroutines in the JPEG Library. Our basic strategy is to use "setjmp()"/ + "longjmp()" in order to return control to the TIFF Library when the JPEG + library detects an error, and to use TIFF Library subroutines for displaying + diagnostic messages to a client application. +*/ static void -OJPEGPrintDir(TIFF* tif, FILE* fd, long flags) +TIFFojpeg_error_exit(register j_common_ptr cinfo) { - 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); + char buffer[JMSG_LENGTH_MAX]; + int code = cinfo->err->msg_code; + + if (((OJPEGState *)cinfo)->is_WANG) { + if (code == JERR_SOF_DUPLICATE || code == JERR_SOI_DUPLICATE) + return; /* ignore it */ + } + + (*cinfo->err->format_message)(cinfo,buffer); + TIFFError(JPEGLib_name,buffer); /* Display error message */ + jpeg_abort(cinfo); /* Clean up JPEG Library state */ + LONGJMP(((OJPEGState *)cinfo)->exit_jmpbuf,1); /* Return to TIFF client */ } 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); -} +TIFFojpeg_output_message(register j_common_ptr cinfo) + { char buffer[JMSG_LENGTH_MAX]; -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); -} + /* This subroutine is invoked only for warning messages, since the JPEG + Library's "error_exit" method does its own thing and "trace_level" is never + set > 0. + */ + (*cinfo->err->format_message)(cinfo,buffer); + TIFFWarning(JPEGLib_name,buffer); + } -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); -} +/* The following subroutines, which also interface with the JPEG Library, exist + mainly in limit the side effects of "setjmp()" and convert JPEG normal/error + conditions into TIFF Library return codes. +*/ +#define CALLJPEG(sp,fail,op)(SETJMP((sp)->exit_jmpbuf)?(fail):(op)) +#define CALLVJPEG(sp,op)CALLJPEG(sp,0,((op),1)) +#ifdef never 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); - } -} - +TIFFojpeg_create_compress(register OJPEGState *sp) + { + sp->cinfo.c.err = jpeg_std_error(&sp->err); /* Initialize error handling */ + sp->err.error_exit = TIFFojpeg_error_exit; + sp->err.output_message = TIFFojpeg_output_message; + return CALLVJPEG(sp,jpeg_create_compress(&sp->cinfo.c)); + } + +/* The following subroutines comprise a JPEG Library "destination" data manager + by directing compressed data from the JPEG Library to a TIFF Library output + buffer. +*/ 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); -} +std_init_destination(register j_compress_ptr cinfo){} /* "Dummy" stub */ -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 boolean +std_empty_output_buffer(register j_compress_ptr cinfo) + { +# define sp ((OJPEGState *)cinfo) + register TIFF *tif = sp->tif; + + tif->tif_rawcc = tif->tif_rawdatasize; /* Entire buffer has been filled */ + TIFFFlushData1(tif); + sp->dest.next_output_byte = (JOCTET *)tif->tif_rawdata; + sp->dest.free_in_buffer = (size_t)tif->tif_rawdatasize; + return TRUE; +# undef sp + } 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); -} +std_term_destination(register j_compress_ptr cinfo) + { +# define sp ((OJPEGState *)cinfo) + register TIFF *tif = sp->tif; -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); -} + /* NB: The TIFF Library does the final buffer flush. */ + tif->tif_rawcp = (tidata_t)sp->dest.next_output_byte; + tif->tif_rawcc = tif->tif_rawdatasize - (tsize_t)sp->dest.free_in_buffer; +# undef sp + } -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 - { - 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); -} +/* Alternate destination manager to output JPEGTables field: */ 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); -} +tables_init_destination(register j_compress_ptr cinfo) + { +# define sp ((OJPEGState *)cinfo) + /* The "jpegtables_length" field is the allocated buffer size while building */ + sp->dest.next_output_byte = (JOCTET *)sp->jpegtables; + sp->dest.free_in_buffer = (size_t)sp->jpegtables_length; +# undef sp + } -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 boolean +tables_empty_output_buffer(register j_compress_ptr cinfo) + { void *newbuf; +# define sp ((OJPEGState *)cinfo) + + /* The entire buffer has been filled, so enlarge it by 1000 bytes. */ + if (!( newbuf = _TIFFrealloc( (tdata_t)sp->jpegtables + , (tsize_t)(sp->jpegtables_length + 1000) + ) + ) + ) ERREXIT1(cinfo,JERR_OUT_OF_MEMORY,100); + sp->dest.next_output_byte = (JOCTET *)newbuf + sp->jpegtables_length; + sp->dest.free_in_buffer = (size_t)1000; + sp->jpegtables = newbuf; + sp->jpegtables_length += 1000; + return TRUE; +# undef sp + } 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 - */ - } -} +tables_term_destination(register j_compress_ptr cinfo) + { +# define sp ((OJPEGState *)cinfo) + /* Set tables length to no. of Bytes actually emitted. */ + sp->jpegtables_length -= sp->dest.free_in_buffer; +# undef sp + } + +/*ARGSUSED*/ static int +TIFFojpeg_tables_dest(register OJPEGState *sp, TIFF *tif) + { + + /* Allocate a working buffer for building tables. The initial size is 1000 + Bytes, which is usually adequate. + */ + if (sp->jpegtables) _TIFFfree(sp->jpegtables); + if (!(sp->jpegtables = (void*) + _TIFFmalloc((tsize_t)(sp->jpegtables_length = 1000)) + ) + ) + { + sp->jpegtables_length = 0; + TIFFError("TIFFojpeg_tables_dest",no_jtable_space); + return 0; + }; + sp->cinfo.c.dest = &sp->dest; + sp->dest.init_destination = tables_init_destination; + sp->dest.empty_output_buffer = tables_empty_output_buffer; + sp->dest.term_destination = tables_term_destination; + return 1; + } +#else /* well, hardly ever */ 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); -} +_notSupported(register TIFF *tif) + { const TIFFCodec *c = TIFFFindCODEC(tif->tif_dir.td_compression); -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++; -} + TIFFError(tif->tif_name,"%s compression not supported",c->name); + return 0; + } +#endif /* never */ +/* The following subroutines comprise a JPEG Library "source" data manager by + by directing compressed data to the JPEG Library from a TIFF Library input + buffer. +*/ 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++; -} +std_init_source(register j_decompress_ptr cinfo) + { +# define sp ((OJPEGState *)cinfo) + register TIFF *tif = sp->tif; + + if (sp->src.bytes_in_buffer == 0) + { + sp->src.next_input_byte = (const JOCTET *)tif->tif_rawdata; + sp->src.bytes_in_buffer = (size_t)tif->tif_rawcc; + }; +# undef sp + } -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 boolean +std_fill_input_buffer(register j_decompress_ptr cinfo) + { static const JOCTET dummy_EOI[2]={0xFF,JPEG_EOI}; +# define sp ((OJPEGState *)cinfo) -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++; -} + /* Control should never get here, since an entire strip/tile is read into + memory before the decompressor is called; thus, data should have been + supplied by the "init_source" method. ...But, sometimes things fail. + */ + WARNMS(cinfo,JWRN_JPEG_EOF); + sp->src.next_input_byte = dummy_EOI; /* Insert a fake EOI marker */ + sp->src.bytes_in_buffer = sizeof dummy_EOI; + return TRUE; +# undef sp + } 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++; -} - +std_skip_input_data(register j_decompress_ptr cinfo, long num_bytes) + { +# define sp ((OJPEGState *)cinfo) + + if (num_bytes > 0) + { + if (num_bytes > (long)sp->src.bytes_in_buffer) /* oops: buffer overrun */ + (void)std_fill_input_buffer(cinfo); + else + { + sp->src.next_input_byte += (size_t)num_bytes; + sp->src.bytes_in_buffer -= (size_t)num_bytes; + } + } +# undef sp + } + +/*ARGSUSED*/ static void +std_term_source(register j_decompress_ptr cinfo){} /* "Dummy" stub */ + +/* Allocate temporary I/O buffers for downsampled data, using values computed in + "jpeg_start_{de}compress()". We use the JPEG Library's allocator so that + buffers will be released automatically when done with a strip/tile. This is + also a handy place to compute samplesperclump, bytesperline, etc. +*/ 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; -} +alloc_downsampled_buffers(TIFF *tif,jpeg_component_info *comp_info, + int num_components) + { register OJPEGState *sp = OJState(tif); + + sp->samplesperclump = 0; + if (num_components > 0) + { tsize_t size = sp->cinfo.comm.is_decompressor +# ifdef D_LOSSLESS_SUPPORTED + ? sp->cinfo.d.min_codec_data_unit +# else + ? DCTSIZE +# endif +# ifdef C_LOSSLESS_SUPPORTED + : sp->cinfo.c.data_unit; +# else + : DCTSIZE; +# endif + int ci = 0; + register jpeg_component_info *compptr = comp_info; + + do + { JSAMPARRAY buf; + + sp->samplesperclump += + compptr->h_samp_factor * compptr->v_samp_factor; +# if defined(C_LOSSLESS_SUPPORTED) || defined(D_LOSSLESS_SUPPORTED) + if (!(buf = CALLJPEG(sp,0,(*sp->cinfo.comm.mem->alloc_sarray)(&sp->cinfo.comm,JPOOL_IMAGE,compptr->width_in_data_units*size,compptr->v_samp_factor*size)))) +# else + if (!(buf = CALLJPEG(sp,0,(*sp->cinfo.comm.mem->alloc_sarray)(&sp->cinfo.comm,JPOOL_IMAGE,compptr->width_in_blocks*size,compptr->v_samp_factor*size)))) +# endif + return 0; + sp->ds_buffer[ci] = buf; + } + while (++compptr,++ci < num_components); + }; + return 1; + } +#ifdef never + +/* JPEG Encoding begins here. */ + +/*ARGSUSED*/ static int +OJPEGEncode(register TIFF *tif,tidata_t buf,tsize_t cc,tsample_t s) + { tsize_t rows; /* No. of unprocessed rows in file */ + register OJPEGState *sp = OJState(tif); + + /* Encode a chunk of pixels, where returned data is NOT down-sampled (the + standard case). The data is expected to be written in scan-line multiples. + */ + if (cc % sp->bytesperline) TIFFWarning(tif->tif_name,no_write_frac); + if ( (cc /= bytesperline) /* No. of complete rows in caller's buffer */ + > (rows = sp->cinfo.c.image_height - sp->cinfo.c.next_scanline) + ) cc = rows; + while (--cc >= 0) + { + if ( CALLJPEG(sp,-1,jpeg_write_scanlines(&sp->cinfo.c,(JSAMPARRAY)&buf,1)) + != 1 + ) return 0; + ++tif->tif_row; + buf += sp->bytesperline; + }; + return 1; + } + +/*ARGSUSED*/ static int +OJPEGEncodeRaw(register TIFF *tif,tidata_t buf,tsize_t cc,tsample_t s) + { tsize_t rows; /* No. of unprocessed rows in file */ + JDIMENSION lines_per_MCU, size; + register OJPEGState *sp = OJState(tif); + + /* Encode a chunk of pixels, where returned data is down-sampled as per the + sampling factors. The data is expected to be written in scan-line + multiples. + */ + cc /= sp->bytesperline; + if (cc % sp->bytesperline) TIFFWarning(tif->tif_name,no_write_frac); + if ( (cc /= bytesperline) /* No. of complete rows in caller's buffer */ + > (rows = sp->cinfo.c.image_height - sp->cinfo.c.next_scanline) + ) cc = rows; +# ifdef C_LOSSLESS_SUPPORTED + lines_per_MCU = sp->cinfo.c.max_samp_factor*(size = sp->cinfo.d.data_unit); +# else + lines_per_MCU = sp->cinfo.c.max_samp_factor*(size = DCTSIZE); +# endif + while (--cc >= 0) + { int ci = 0, clumpoffset = 0; + register jpeg_component_info *compptr = sp->cinfo.c.comp_info; + + /* The fastest way to separate the data is to make 1 pass over the scan + line for each row of each component. + */ + do + { int ypos = 0; + + do + { int padding; + register JSAMPLE *inptr = (JSAMPLE*)buf + clumpoffset, + *outptr = + sp->ds_buffer[ci][sp->scancount*compptr->v_samp_factor+ypos]; + /* Cb,Cr both have sampling factors 1, so this is correct */ + register int clumps_per_line = + sp->cinfo.c.comp_info[1].downsampled_width, + xpos; + + padding = (int) +# ifdef C_LOSSLESS_SUPPORTED + ( compptr->width_in_data_units * size +# else + ( compptr->width_in_blocks * size +# endif + - clumps_per_line * compptr->h_samp_factor + ); + if (compptr->h_samp_factor == 1) /* Cb & Cr fast path */ + do *outptr++ = *inptr; + while ((inptr += sp->samplesperclump),--clumps_per_line > 0); + else /* general case */ + do + { + xpos = 0; + do *outptr++ = inptr[xpos]; + while (++xpos < compptr->h_samp_factor); + } + while ((inptr += sp->samplesperclump),--clumps_per_line > 0); + xpos = 0; /* Pad each scan line as needed */ + do outptr[0] = outptr[-1]; while (++outptr,++xpos < padding); + clumpoffset += compptr->h_samp_factor; + } + while (++ypos < compptr->v_samp_factor); + } + while (++compptr,++ci < sp->cinfo.c.num_components); + if (++sp->scancount >= size) + { + if ( CALLJPEG(sp,-1,jpeg_write_raw_data(&sp->cinfo.c,sp->ds_buffer,lines_per_MCU)) + != lines_per_MCU + ) return 0; + sp->scancount = 0; + }; + ++tif->tif_row++ + buf += sp->bytesperline; + }; + return 1; + } -#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 +OJPEGSetupEncode(register TIFF *tif) + { static const char module[]={"OJPEGSetupEncode"}; + uint32 segment_height, segment_width; + int status = 1; /* Assume success by default */ + register OJPEGState *sp = OJState(tif); +# define td (&tif->tif_dir) + + /* Verify miscellaneous parameters. This will need work if the TIFF Library + ever supports different depths for different components, or if the JPEG + Library ever supports run-time depth selection. Neither seems imminent. + */ + if (td->td_bitspersample != 8) + { + TIFFError(module,bad_bps,td->td_bitspersample); + status = 0; + }; + + /* The TIFF Version 6.0 specification and IJG JPEG Library accept different + sets of color spaces, so verify that our image belongs to the common subset + and map its photometry code, then initialize to handle subsampling and + optional JPEG Library YCbCr <-> RGB color-space conversion. + */ + switch (td->td_photometric) + { + case PHOTOMETRIC_YCBCR : + + /* ISO IS 10918-1 requires that JPEG subsampling factors be 1-4, but + TIFF Version 6.0 is more restrictive: only 1, 2, and 4 are allowed. + */ + if ( ( td->td_ycbcrsubsampling[0] == 1 + || td->td_ycbcrsubsampling[0] == 2 + || td->td_ycbcrsubsampling[0] == 4 + ) + && ( td->td_ycbcrsubsampling[1] == 1 + || td->td_ycbcrsubsampling[1] == 2 + || td->td_ycbcrsubsampling[1] == 4 + ) + ) + sp->cinfo.c.raw_data_in = + ( (sp->h_sampling = td->td_ycbcrsubsampling[0]) << 3 + | (sp->v_sampling = td->td_ycbcrsubsampling[1]) + ) != 011; + else + { + TIFFError(module,bad_subsampling); + status = 0; + }; + + /* A ReferenceBlackWhite field MUST be present, since the default value + is inapproriate for YCbCr. Fill in the proper value if the + application didn't set it. + */ + if (!TIFFFieldSet(tif,FIELD_REFBLACKWHITE)) + { float refbw[6]; + long top = 1L << td->td_bitspersample; + + refbw[0] = 0; + refbw[1] = (float)(top-1L); + refbw[2] = (float)(top>>1); + refbw[3] = refbw[1]; + refbw[4] = refbw[2]; + refbw[5] = refbw[1]; + TIFFSetField(tif,TIFFTAG_REFERENCEBLACKWHITE,refbw); + }; + sp->cinfo.c.jpeg_color_space = JCS_YCbCr; + if (sp->jpegcolormode == JPEGCOLORMODE_RGB) + { + sp->cinfo.c.raw_data_in = FALSE; + sp->in_color_space = JCS_RGB; + break; + }; + goto L2; + case PHOTOMETRIC_MINISBLACK: + sp->cinfo.c.jpeg_color_space = JCS_GRAYSCALE; + goto L1; + case PHOTOMETRIC_RGB : + sp->cinfo.c.jpeg_color_space = JCS_RGB; + goto L1; + case PHOTOMETRIC_SEPARATED : + sp->cinfo.c.jpeg_color_space = JCS_CMYK; + L1: sp->jpegcolormode = JPEGCOLORMODE_RAW; /* No JPEG Lib. conversion */ + L2: sp->cinfo.d.in_color_space = sp->cinfo.d.jpeg_color-space; + break; + default : + TIFFError(module,bad_photometry,td->td_photometric); + status = 0; + }; + tif->tif_encoderow = tif->tif_encodestrip = tif->tif_encodetile = + sp->cinfo.c.raw_data_in ? OJPEGEncodeRaw : OJPEGEncode; + if (isTiled(tif)) + { tsize_t size; + +# ifdef C_LOSSLESS_SUPPORTED + if ((size = sp->v_sampling*sp->cinfo.c.data_unit) < 16) size = 16; +# else + if ((size = sp->v_sampling*DCTSIZE) < 16) size = 16; +# endif + if ((segment_height = td->td_tilelength) % size) + { + TIFFError(module,"JPEG tile height must be multiple of %d",size); + status = 0; + }; +# ifdef C_LOSSLESS_SUPPORTED + if ((size = sp->h_sampling*sp->cinfo.c.data_unit) < 16) size = 16; +# else + if ((size = sp->h_sampling*DCTSIZE) < 16) size = 16; +# endif + if ((segment_width = td->td_tilewidth) % size) + { + TIFFError(module,"JPEG tile width must be multiple of %d",size); + status = 0; + }; + sp->bytesperline = TIFFTileRowSize(tif); + } + else + { tsize_t size; + +# ifdef C_LOSSLESS_SUPPORTED + if ((size = sp->v_sampling*sp->cinfo.c.data_unit) < 16) size = 16; +# else + if ((size = sp->v_sampling*DCTSIZE) < 16) size = 16; +# endif + if (td->td_rowsperstrip < (segment_height = td->td_imagelength)) + { + if (td->td_rowsperstrip % size) + { + TIFFError(module,"JPEG RowsPerStrip must be multiple of %d",size); + status = 0; + }; + segment_height = td->td_rowsperstrip; + }; + segment_width = td->td_imagewidth; + sp->bytesperline = tif->tif_scanlinesize; + }; + if (segment_width > 65535 || segment_height > 65535) + { + TIFFError(module,"Strip/tile too large for JPEG"); + status = 0; + }; + + /* Initialize all JPEG parameters to default values. Note that the JPEG + Library's "jpeg_set_defaults()" method needs legal values for the + "in_color_space" and "input_components" fields. + */ + sp->cinfo.c.input_components = 1; /* Default for JCS_UNKNOWN */ + if (!CALLVJPEG(sp,jpeg_set_defaults(&sp->cinfo.c))) status = 0; + switch (sp->jpegtablesmode & (JPEGTABLESMODE_HUFF|JPEGTABLESMODE_QUANT)) + { register JHUFF_TBL *htbl; + register JQUANT_TBL *qtbl; + + case 0 : + sp->cinfo.c.optimize_coding = TRUE; + case JPEGTABLESMODE_HUFF : + if (!CALLVJPEG(sp,jpeg_set_quality(&sp->cinfo.c,sp->jpegquality,FALSE))) + return 0; + if (qtbl = sp->cinfo.c.quant_tbl_ptrs[0]) qtbl->sent_table = FALSE; + if (qtbl = sp->cinfo.c.quant_tbl_ptrs[1]) qtbl->sent_table = FALSE; + goto L3; + case JPEGTABLESMODE_QUANT : + sp->cinfo.c.optimize_coding = TRUE; + + /* We do not support application-supplied JPEG tables, so mark the field + "not present". + */ + L3: TIFFClrFieldBit(tif,FIELD_JPEGTABLES); + break; + case JPEGTABLESMODE_HUFF|JPEGTABLESMODE_QUANT: + if ( !CALLVJPEG(sp,jpeg_set_quality(&sp->cinfo.c,sp->jpegquality,FALSE)) + || !CALLVJPEG(sp,jpeg_suppress_tables(&sp->cinfo.c,TRUE)) + ) + { + status = 0; + break; + }; + if (qtbl = sp->cinfo.c.quant_tbl_ptrs[0]) qtbl->sent_table = FALSE; + if (htbl = sp->cinfo.c.dc_huff_tbl_ptrs[0]) htbl->sent_table = FALSE; + if (htbl = sp->cinfo.c.ac_huff_tbl_ptrs[0]) htbl->sent_table = FALSE; + if (sp->cinfo.c.jpeg_color_space == JCS_YCbCr) + { + if (qtbl = sp->cinfo.c.quant_tbl_ptrs[1]) + qtbl->sent_table = FALSE; + if (htbl = sp->cinfo.c.dc_huff_tbl_ptrs[1]) + htbl->sent_table = FALSE; + if (htbl = sp->cinfo.c.ac_huff_tbl_ptrs[1]) + htbl->sent_table = FALSE; + }; + if ( TIFFojpeg_tables_dest(sp,tif) + && CALLVJPEG(sp,jpeg_write_tables(&sp->cinfo.c)) + ) + { + + /* Mark the field "present". We can't use "TIFFSetField()" because + "BEENWRITING" is already set! + */ + TIFFSetFieldBit(tif,FIELD_JPEGTABLES); + tif->tif_flags |= TIFF_DIRTYDIRECT; + } + else status = 0; + }; + if ( sp->cinfo.c.raw_data_in + && !alloc_downsampled_buffers(tif,sp->cinfo.c.comp_info, + sp->cinfo.c.num_components) + ) status = 0; + if (status == 0) return 0; /* If TIFF errors, don't bother to continue */ + /* Grab parameters that are same for all strips/tiles. */ + + sp->dest.init_destination = std_init_destination; + sp->dest.empty_output_buffer = std_empty_output_buffer; + sp->dest.term_destination = std_term_destination; + sp->cinfo.c.dest = &sp->dest; + sp->cinfo.c.data_precision = td->td_bitspersample; + sp->cinfo.c.write_JFIF_header = /* Don't write extraneous markers */ + sp->cinfo.c.write_Adobe_marker = FALSE; + sp->cinfo.c.image_width = segment_width; + sp->cinfo.c.image_height = segment_height; + sp->cinfo.c.comp_info[0].h_samp_factor = + sp->cinfo.c.comp_info[0].v_samp_factor = 1; + return CALLVJPEG(sp,jpeg_start_compress(&sp->cinfo.c,FALSE)); +# undef td + } -#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 +OJPEGPreEncode(register TIFF *tif,tsample_t s) + { register OJPEGState *sp = OJState(tif); +# define td (&tif->tif_dir) + + /* If we are about to write the first row of an image plane, which should + coincide with a JPEG "scan", reset the JPEG Library's compressor. Otherwise + let the compressor run "as is" and return a "success" status without further + ado. + */ + if ( (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip) + % td->td_stripsperimage + == 0 + ) + { + if ( (sp->cinfo.c.comp_info[0].component_id = s) == 1) + && sp->cinfo.c.jpeg_color_space == JCS_YCbCr + ) + { + sp->cinfo.c.comp_info[0].quant_tbl_no = + sp->cinfo.c.comp_info[0].dc_tbl_no = + sp->cinfo.c.comp_info[0].ac_tbl_no = 1; + sp->cinfo.c.comp_info[0].h_samp_factor = sp->h_sampling; + sp->cinfo.c.comp_info[0].v_samp_factor = sp->v_sampling; + + /* Scale expected strip/tile size to match a downsampled component. */ + + sp->cinfo.c.image_width = TIFFhowmany(segment_width,sp->h_sampling); + sp->cinfo.c.image_height=TIFFhowmany(segment_height,sp->v_sampling); + }; + sp->scancount = 0; /* Mark subsampling buffer(s) empty */ + }; + return 1; +# undef td + } -#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 +OJPEGPostEncode(register TIFF *tif) + { register OJPEGState *sp = OJState(tif); + + /* Finish up at the end of a strip or tile. */ + + if (sp->scancount > 0) /* emit partial buffer of down-sampled data */ + { JDIMENSION n; + +# ifdef C_LOSSLESS_SUPPORTED + if ( sp->scancount < sp->cinfo.c.data_unit + && sp->cinfo.c.num_components > 0 + ) +# else + if (sp->scancount < DCTSIZE && sp->cinfo.c.num_components > 0) +# endif + { int ci = 0, /* Pad the data vertically */ +# ifdef C_LOSSLESS_SUPPORTED + size = sp->cinfo.c.data_unit; +# else + size = DCTSIZE; +# endif + register jpeg_component_info *compptr = sp->cinfo.c.comp_info; + + do +# ifdef C_LOSSLESS_SUPPORTED + { tsize_t row_width = compptr->width_in_data_units +# else + tsize_t row_width = compptr->width_in_blocks +# endif + *size*sizeof(JSAMPLE); + int ypos = sp->scancount*compptr->v_samp_factor; + + do _TIFFmemcpy( (tdata_t)sp->ds_buffer[ci][ypos] + , (tdata_t)sp->ds_buffer[ci][ypos-1] + , row_width + ); + while (++ypos < compptr->v_samp_factor*size); + } + while (++compptr,++ci < sp->cinfo.c.num_components); + }; + n = sp->cinfo.c.max_v_samp_factor*size; + if (CALLJPEG(sp,-1,jpeg_write_raw_data(&sp->cinfo.c,sp->ds_buffer,n)) != n) + return 0; + }; + return CALLVJPEG(sp,jpeg_finish_compress(&sp->cinfo.c)); + } +#endif /* never */ + +/* JPEG Decoding begins here. */ + +/*ARGSUSED*/ static int +OJPEGDecode(register TIFF *tif,tidata_t buf,tsize_t cc,tsample_t s) + { tsize_t bytesperline = isTiled(tif) + ? TIFFTileRowSize(tif) + : tif->tif_scanlinesize, + rows; /* No. of unprocessed rows in file */ + register OJPEGState *sp = OJState(tif); + + /* Decode a chunk of pixels, where the input data has not NOT been down- + sampled, or else the TIFF Library's client has used the "JPEGColorMode" TIFF + pseudo-tag to request that the JPEG Library do color-space conversion; this + is the normal case. The data is expected to be read in scan-line multiples, + and this subroutine is called for both pixel-interleaved and separate color + planes. + + WARNING: Unlike "OJPEGDecodeRawContig()", below, the no. of Bytes in each + decoded row is calculated here as "bytesperline" instead of + using "sp->bytesperline", which might be a little smaller. This can + occur for an old tiled image whose width isn't a multiple of 8 pixels. + That's illegal according to the TIFF Version 6 specification, but some + test files, like "zackthecat.tif", were built that way. In those cases, + we want to embed the image's true width in our caller's buffer (which is + presumably allocated according to the expected tile width) by + effectively "padding" it with unused Bytes at the end of each row. + */ + if ( (cc /= bytesperline) /* No. of complete rows in caller's buffer */ + > (rows = sp->cinfo.d.output_height - sp->cinfo.d.output_scanline) + ) cc = rows; + while (--cc >= 0) + { + if ( CALLJPEG(sp,-1,jpeg_read_scanlines(&sp->cinfo.d,(JSAMPARRAY)&buf,1)) + != 1 + ) return 0; + buf += bytesperline; + ++tif->tif_row; + }; + + /* BEWARE OF KLUDGE: If our input file was produced by Microsoft's Wang + Imaging for Windows application, the DC coefficients of + each JPEG image component (Y,Cb,Cr) must be reset at the end of each TIFF + "strip", and any JPEG data bits remaining in the current Byte of the + decoder's input buffer must be discarded. To do so, we create an "ad hoc" + interface in the "jdhuff.c" module of IJG JPEG Library Version 6 (module + "jdshuff.c", if Ken Murchison's lossless-Huffman patch is applied), and we + invoke that interface here after decoding each "strip". + */ + if (sp->is_WANG) jpeg_reset_huff_decode(&sp->cinfo.d); + return 1; + } + +/*ARGSUSED*/ static int +OJPEGDecodeRawContig(register TIFF *tif,tidata_t buf,tsize_t cc,tsample_t s) + { tsize_t rows; /* No. of unprocessed rows in file */ + JDIMENSION lines_per_MCU, size; + register OJPEGState *sp = OJState(tif); + + /* Decode a chunk of pixels, where the input data has pixel-interleaved color + planes, some of which have been down-sampled, but the TIFF Library's client + has NOT used the "JPEGColorMode" TIFF pseudo-tag to request that the JPEG + Library do color-space conversion. In other words, we must up-sample/ + expand/duplicate image components according to the image's sampling factors, + without changing its color space. The data is expected to be read in scan- + line multiples. + */ + if ( (cc /= sp->bytesperline) /* No. of complete rows in caller's buffer */ + > (rows = sp->cinfo.d.output_height - sp->cinfo.d.output_scanline) + ) cc = rows; + lines_per_MCU = sp->cinfo.d.max_v_samp_factor +# ifdef D_LOSSLESS_SUPPORTED + * (size = sp->cinfo.d.min_codec_data_unit); +# else + * (size = DCTSIZE); +# endif + while (--cc >= 0) + { int clumpoffset, ci; + register jpeg_component_info *compptr; + + if (sp->scancount >= size) /* reload downsampled-data buffers */ + { + if ( CALLJPEG(sp,-1,jpeg_read_raw_data(&sp->cinfo.d,sp->ds_buffer,lines_per_MCU)) + != lines_per_MCU + ) return 0; + sp->scancount = 0; + }; + + /* The fastest way to separate the data is: make 1 pass over the scan + line for each row of each component. + */ + clumpoffset = ci = 0; + compptr = sp->cinfo.d.comp_info; + do + { int ypos = 0; + + if (compptr->h_samp_factor == 1) /* fast path */ + do + { register JSAMPLE *inptr = + sp->ds_buffer[ci][sp->scancount*compptr->v_samp_factor+ypos], + *outptr = (JSAMPLE *)buf + clumpoffset; + register int clumps_per_line = compptr->downsampled_width; + + do *outptr = *inptr++; + while ((outptr += sp->samplesperclump),--clumps_per_line > 0); + } + while ( (clumpoffset += compptr->h_samp_factor) + , ++ypos < compptr->v_samp_factor + ); + else /* general case */ + do + { register JSAMPLE *inptr = + sp->ds_buffer[ci][sp->scancount*compptr->v_samp_factor+ypos], + *outptr = (JSAMPLE *)buf + clumpoffset; + register int clumps_per_line = compptr->downsampled_width; + + do + { register int xpos = 0; + + do outptr[xpos] = *inptr++; + while (++xpos < compptr->h_samp_factor); + } + while ((outptr += sp->samplesperclump),--clumps_per_line > 0); + } + while ( (clumpoffset += compptr->h_samp_factor) + , ++ypos < compptr->v_samp_factor + ); + } + while (++compptr,++ci < sp->cinfo.d.num_components); + ++sp->scancount; + buf += sp->bytesperline; + ++tif->tif_row; + }; + + /* BEWARE OF KLUDGE: If our input file was produced by Microsoft's Wang + Imaging for Windows application, the DC coefficients of + each JPEG image component (Y,Cb,Cr) must be reset at the end of each TIFF + "strip", and any JPEG data bits remaining in the current Byte of the + decoder's input buffer must be discarded. To do so, we create an "ad hoc" + interface in the "jdhuff.c" module of IJG JPEG Library Version 6 (module + "jdshuff.c", if Ken Murchison's lossless-Huffman patch is applied), and we + invoke that interface here after decoding each "strip". + */ + if (sp->is_WANG) jpeg_reset_huff_decode(&sp->cinfo.d); + return 1; + } + +/*ARGSUSED*/ static int +OJPEGDecodeRawSeparate(TIFF *tif,register tidata_t buf,tsize_t cc,tsample_t s) + { tsize_t rows; /* No. of unprocessed rows in file */ + JDIMENSION lines_per_MCU, + size, /* ...of MCU */ + v; /* Component's vertical up-sampling ratio */ + register OJPEGState *sp = OJState(tif); + register jpeg_component_info *compptr = sp->cinfo.d.comp_info + s; + + /* Decode a chunk of pixels, where the input data has separate color planes, + some of which have been down-sampled, but the TIFF Library's client has NOT + used the "JPEGColorMode" TIFF pseudo-tag to request that the JPEG Library + do color-space conversion. The data is expected to be read in scan-line + multiples. + */ + v = sp->cinfo.d.max_v_samp_factor/compptr->v_samp_factor; + if ( (cc /= compptr->downsampled_width) /* No. of rows in caller's buffer */ + > (rows = (sp->cinfo.d.output_height-sp->cinfo.d.output_scanline+v-1)/v) + ) cc = rows; /* No. of rows of "clumps" to read */ + lines_per_MCU = sp->cinfo.d.max_v_samp_factor +# ifdef D_LOSSLESS_SUPPORTED + * (size = sp->cinfo.d.min_codec_data_unit); +# else + * (size = DCTSIZE); +# endif + L: if (sp->scancount >= size) /* reload downsampled-data buffers */ + { + if ( CALLJPEG(sp,-1,jpeg_read_raw_data(&sp->cinfo.d,sp->ds_buffer,lines_per_MCU)) + != lines_per_MCU + ) return 0; + sp->scancount = 0; + }; + rows = 0; + do + { register JSAMPLE *inptr = + sp->ds_buffer[s][sp->scancount*compptr->v_samp_factor + rows]; + register int clumps_per_line = compptr->downsampled_width; + + do *buf++ = *inptr++; while (--clumps_per_line > 0); /* Copy scanline */ + tif->tif_row += v; + if (--cc <= 0) return 1; /* End of caller's buffer? */ + } + while (++rows < compptr->v_samp_factor); + ++sp->scancount; + goto L; + } + +/* "OJPEGSetupDecode()" temporarily forces the JPEG Library to use the following + subroutine as a "dummy" input reader in order to fool the library into + thinking that it has read the image's first "Start of Scan" (SOS) marker, so + that it initializes accordingly. +*/ +/*ARGSUSED*/ METHODDEF(int) +fake_SOS_marker(j_decompress_ptr cinfo){return JPEG_REACHED_SOS;} + +/*ARGSUSED*/ METHODDEF(int) +suspend(j_decompress_ptr cinfo){return JPEG_SUSPENDED;} + +/* The JPEG Library's "null" color-space converter actually re-packs separate + color planes (it's native image representation) into a pixel-interleaved, + contiguous plane. But if our TIFF Library client is tryng to process a + PLANARCONFIG_SEPARATE image, we don't want that; so here are modifications of + code in the JPEG Library's "jdcolor.c" file, which simply copy Bytes to a + color plane specified by the current JPEG "scan". +*/ +METHODDEF(void) +ycc_rgb_convert(register j_decompress_ptr cinfo,JSAMPIMAGE in,JDIMENSION row, + register JSAMPARRAY out,register int nrows) + { typedef struct /* "jdcolor.c" color-space conversion state */ + { + + /* WARNING: This declaration is ugly and dangerous! It's supposed to be + private to the JPEG Library's "jdcolor.c" module, but we also + need it here. Since the library's copy might change without notice, be + sure to keep this one synchronized or the following code will break! + */ + struct jpeg_color_deconverter pub; /* Public fields */ + /* Private state for YCC->RGB conversion */ + int *Cr_r_tab, /* ->Cr to R conversion table */ + *Cb_b_tab; /* ->Cb to B conversion table */ + INT32 *Cr_g_tab, /* ->Cr to G conversion table */ + *Cb_g_tab; /* ->Cb to G conversion table */ + } *my_cconvert_ptr; + my_cconvert_ptr cconvert = (my_cconvert_ptr)cinfo->cconvert; + JSAMPARRAY irow0p = in[0] + row; + register JSAMPLE *range_limit = cinfo->sample_range_limit; + register JSAMPROW outp, Y; + + switch (cinfo->output_scan_number - 1) + { JSAMPARRAY irow1p, irow2p; + register INT32 *table0, *table1; + SHIFT_TEMPS + + case RGB_RED : irow2p = in[2] + row; + table0 = (INT32 *)cconvert->Cr_r_tab; + while (--nrows >= 0) + { register JSAMPROW Cr = *irow2p++; + register int i = cinfo->output_width; + + Y = *irow0p++; + outp = *out++; + while (--i >= 0) + *outp++ = range_limit[*Y++ + table0[*Cr++]]; + }; + return; + case RGB_GREEN: irow1p = in[1] + row; + irow2p = in[2] + row; + table0 = cconvert->Cb_g_tab; + table1 = cconvert->Cr_g_tab; + while (--nrows >= 0) + { register JSAMPROW Cb = *irow1p++, + Cr = *irow2p++; + register int i = cinfo->output_width; + + Y = *irow0p++; + outp = *out++; + while (--i >= 0) + *outp++ = + range_limit[ *Y++ + + RIGHT_SHIFT(table0[*Cb++]+table1[*Cr++],16) + ]; + }; + return; + case RGB_BLUE : irow1p = in[1] + row; + table0 = (INT32 *)cconvert->Cb_b_tab; + while (--nrows >= 0) + { register JSAMPROW Cb = *irow1p++; + register int i = cinfo->output_width; + + Y = *irow0p++; + outp = *out++; + while (--i >= 0) + *outp++ = range_limit[*Y++ + table0[*Cb++]]; + } + } + } + +METHODDEF(void) +null_convert(register j_decompress_ptr cinfo,JSAMPIMAGE in,JDIMENSION row, + register JSAMPARRAY out,register int nrows) + { register JSAMPARRAY irowp = in[cinfo->output_scan_number - 1] + row; + + while (--nrows >= 0) _TIFFmemcpy(*out++,*irowp++,cinfo->output_width); + } -#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 +OJPEGSetupDecode(register TIFF *tif) + { static char module[]={"OJPEGSetupDecode"}; + J_COLOR_SPACE jpeg_color_space, /* Color space of JPEG-compressed image */ + out_color_space; /* Color space of decompressed image */ + uint32 segment_width; + int status = 1; /* Assume success by default */ + boolean downsampled_output=FALSE, /* <=> Want JPEG Library's "raw" image? */ + is_JFIF; /* <=> JFIF image? */ + register OJPEGState *sp = OJState(tif); +# define td (&tif->tif_dir) + + /* Verify miscellaneous parameters. This will need work if the TIFF Library + ever supports different depths for different components, or if the JPEG + Library ever supports run-time depth selection. Neither seems imminent. + */ + if (td->td_bitspersample != sp->cinfo.d.data_precision) + { + TIFFError(module,bad_bps,td->td_bitspersample); + status = 0; + }; + + /* The TIFF Version 6.0 specification and IJG JPEG Library accept different + sets of color spaces, so verify that our image belongs to the common subset + and map its photometry code, then initialize to handle subsampling and + optional JPEG Library YCbCr <-> RGB color-space conversion. + */ + switch (td->td_photometric) + { + case PHOTOMETRIC_YCBCR : + + /* ISO IS 10918-1 requires that JPEG subsampling factors be 1-4, but + TIFF Version 6.0 is more restrictive: only 1, 2, and 4 are allowed. + */ + if ( ( td->td_ycbcrsubsampling[0] == 1 + || td->td_ycbcrsubsampling[0] == 2 + || td->td_ycbcrsubsampling[0] == 4 + ) + && ( td->td_ycbcrsubsampling[1] == 1 + || td->td_ycbcrsubsampling[1] == 2 + || td->td_ycbcrsubsampling[1] == 4 + ) + ) + downsampled_output = + ( + (sp->h_sampling = td->td_ycbcrsubsampling[0]) << 3 + | (sp->v_sampling = td->td_ycbcrsubsampling[1]) + ) != 011; + else + { + TIFFError(module,bad_subsampling); + status = 0; + }; + jpeg_color_space = JCS_YCbCr; + if (sp->jpegcolormode == JPEGCOLORMODE_RGB) + { + downsampled_output = FALSE; + out_color_space = JCS_RGB; + break; + }; + goto L2; + case PHOTOMETRIC_MINISBLACK: + jpeg_color_space = JCS_GRAYSCALE; + goto L1; + case PHOTOMETRIC_RGB : + jpeg_color_space = JCS_RGB; + goto L1; + case PHOTOMETRIC_SEPARATED : + jpeg_color_space = JCS_CMYK; + L1: sp->jpegcolormode = JPEGCOLORMODE_RAW; /* No JPEG Lib. conversion */ + L2: out_color_space = jpeg_color_space; + break; + default : + TIFFError(module,bad_photometry,td->td_photometric); + status = 0; + }; + if (status == 0) return 0; /* If TIFF errors, don't bother to continue */ + + /* Set parameters that are same for all strips/tiles. */ + + sp->cinfo.d.src = &sp->src; + sp->src.init_source = std_init_source; + sp->src.fill_input_buffer = std_fill_input_buffer; + sp->src.skip_input_data = std_skip_input_data; + sp->src.resync_to_restart = jpeg_resync_to_restart; + sp->src.term_source = std_term_source; + + /* BOGOSITY ALERT! The Wang Imaging application for Microsoft Windows produces + images containing "JPEGInterchangeFormat[Length]" TIFF + records that resemble JFIF-in-TIFF encapsulations but, in fact, violate the + TIFF Version 6 specification in several ways; nevertheless, we try to handle + them gracefully because there are apparently a lot of them around. The + purported "JFIF" data stream in one of these files vaguely resembles a JPEG + "tables only" data stream, except that there's no trailing EOI marker. The + rest of the JPEG data stream lies in a discontiguous file region, identified + by the 0th Strip offset (which is *also* illegal!), where it begins with an + SOS marker and apparently continues to the end of the file. There is no + trailing EOI marker here, either. + */ + is_JFIF = !sp->is_WANG && TIFFFieldSet(tif,FIELD_JPEGIFOFFSET); -#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 + /* Initialize decompression parameters that won't be overridden by JPEG Library + defaults set during the "jpeg_read_header()" call, below. + */ + segment_width = td->td_imagewidth; + if (isTiled(tif)) + { + if (sp->is_WANG) /* we don't know how to handle it */ + { + TIFFError(module,"Tiled Wang image not supported"); + return 0; + }; + + /* BOGOSITY ALERT! "TIFFTileRowSize()" seems to work fine for modern JPEG- + in-TIFF encapsulations where the image width--like the + tile width--is a multiple of 8 or 16 pixels. But image widths and + heights are aren't restricted to 8- or 16-bit multiples, and we need + the exact Byte count of decompressed scan lines when we call the JPEG + Library. At least one old file ("zackthecat.tif") in the TIFF Library + test suite has widths and heights slightly less than the tile sizes, and + it apparently used the bogus computation below to determine the number + of Bytes per scan line (was this due to an old, broken version of + "TIFFhowmany()"?). Before we get here, "OJPEGSetupDecode()" verified + that our image uses 8-bit samples, so the following check appears to + return the correct answer in all known cases tested to date. + */ + if (is_JFIF || (segment_width & 7) == 0) + sp->bytesperline = TIFFTileRowSize(tif); /* Normal case */ + else + { + /* Was the file-encoder's segment-width calculation bogus? */ + segment_width = (segment_width/sp->h_sampling + 1) * sp->h_sampling; + sp->bytesperline = segment_width * td->td_samplesperpixel; + } + } + else sp->bytesperline = TIFFVStripSize(tif,1); + + /* BEWARE OF KLUDGE: If we have JPEG Interchange File Format (JFIF) image, + then we want to read "metadata" in the bit-stream's + header and validate it against corresponding information in TIFF records. + But if we have a *really old* JPEG file that's not JFIF, then we simply + assign TIFF-record values to JPEG Library variables without checking. + */ + if (is_JFIF) /* JFIF image */ + { unsigned char *end_of_data; + int subsampling_factors; + register unsigned char *p; + register int i; + + /* WARNING: Although the image file contains a JFIF bit stream, it might + also contain some old TIFF records causing "OJPEGVSetField()" + to have allocated quantization or Huffman decoding tables. But when the + JPEG Library reads and parses the JFIF header below, it reallocate these + tables anew without checking for "dangling" pointers, thereby causing a + memory "leak". We have enough information to potentially deallocate the + old tables here, but unfortunately JPEG Library Version 6B uses a "pool" + allocator for small objects, with no deallocation procedure; instead, it + reclaims a whole pool when an image is closed/destroyed, so well-behaved + TIFF client applications (i.e., those which close their JPEG images as + soon as they're no longer needed) will waste memory for a short time but + recover it eventually. But ill-behaved TIFF clients (i.e., those which + keep many JPEG images open gratuitously) can exhaust memory prematurely. + If the JPEG Library ever implements a deallocation procedure, insert + this clean-up code: + */ +# ifdef someday + if (sp->jpegtablesmode & JPEGTABLESMODE_QUANT) /* free quant. tables */ + { register int i = 0; + + do + { register JQUANT_TBL *q; + + if (q = sp->cinfo.d.quant_tbl_ptrs[i]) + { + jpeg_free_small(&sp->cinfo.comm,q,sizeof *q); + sp->cinfo.d.quant_tbl_ptrs[i] = 0; + } + } + while (++i < NUM_QUANT_TBLS); + }; + if (sp->jpegtablesmode & JPEGTABLESMODE_HUFF) /* free Huffman tables */ + { register int i = 0; + + do + { register JHUFF_TBL *h; + + if (h = sp->cinfo.d.dc_huff_tbl_ptrs[i]) + { + jpeg_free_small(&sp->cinfo.comm,h,sizeof *h); + sp->cinfo.d.dc_huff_tbl_ptrs[i] = 0; + }; + if (h = sp->cinfo.d.ac_huff_tbl_ptrs[i]) + { + jpeg_free_small(&sp->cinfo.comm,h,sizeof *h); + sp->cinfo.d.ac_huff_tbl_ptrs[i] = 0; + } + } + while (++i < NUM_HUFF_TBLS); + }; +# endif /* someday */ + + /* Since we might someday wish to try rewriting "old format" JPEG-in-TIFF + encapsulations in "new format" files, try to synthesize the value of a + modern "JPEGTables" TIFF record by scanning the JPEG data from just past + the "Start of Information" (SOI) marker until something other than a + legitimate "table" marker is found, as defined in ISO IS 10918-1 + Appending B.2.4; namely: + + -- Define Quantization Table (DQT) + -- Define Huffman Table (DHT) + -- Define Arithmetic Coding table (DAC) + -- Define Restart Interval (DRI) + -- Comment (COM) + -- Application data (APPn) + + For convenience, we also accept "Expansion" (EXP) markers, although they + are apparently not a part of normal "table" data. + */ + sp->jpegtables = p = (unsigned char *)sp->src.next_input_byte; + end_of_data = p + sp->src.bytes_in_buffer; + p += 2; + while (p < end_of_data && p[0] == 0xFF) + switch (p[1]) + { + default : goto L; + case 0xC0: /* SOF0 */ + case 0xC1: /* SOF1 */ + case 0xC2: /* SOF2 */ + case 0xC3: /* SOF3 */ + case 0xC4: /* DHT */ + case 0xC5: /* SOF5 */ + case 0xC6: /* SOF6 */ + case 0xC7: /* SOF7 */ + case 0xC9: /* SOF9 */ + case 0xCA: /* SOF10 */ + case 0xCB: /* SOF11 */ + case 0xCC: /* DAC */ + case 0xCD: /* SOF13 */ + case 0xCE: /* SOF14 */ + case 0xCF: /* SOF15 */ + case 0xDB: /* DQT */ + case 0xDD: /* DRI */ + case 0xDF: /* EXP */ + case 0xE0: /* APP0 */ + case 0xE1: /* APP1 */ + case 0xE2: /* APP2 */ + case 0xE3: /* APP3 */ + case 0xE4: /* APP4 */ + case 0xE5: /* APP5 */ + case 0xE6: /* APP6 */ + case 0xE7: /* APP7 */ + case 0xE8: /* APP8 */ + case 0xE9: /* APP9 */ + case 0xEA: /* APP10 */ + case 0xEB: /* APP11 */ + case 0xEC: /* APP12 */ + case 0xED: /* APP13 */ + case 0xEE: /* APP14 */ + case 0xEF: /* APP15 */ + case 0xFE: /* COM */ + p += (p[2] << 8 | p[3]) + 2; + }; + L: if (p - (unsigned char *)sp->jpegtables > 2) /* fake "JPEGTables" */ + { + + /* In case our client application asks, pretend that this image file + contains a modern "JPEGTables" TIFF record by copying to a buffer + the initial part of the JFIF bit-stream that we just scanned, from + the SOI marker through the "metadata" tables, then append an EOI + marker and flag the "JPEGTables" TIFF record as "present". + */ + sp->jpegtables_length = p - (unsigned char*)sp->jpegtables + 2; + p = sp->jpegtables; + if (!(sp->jpegtables = _TIFFmalloc(sp->jpegtables_length))) + { + TIFFError(module,no_jtable_space); + return 0; + }; + _TIFFmemcpy(sp->jpegtables,p,sp->jpegtables_length-2); + p = (unsigned char *)sp->jpegtables + sp->jpegtables_length; + p[-2] = 0xFF; p[-1] = JPEG_EOI; /* Append EOI marker */ + TIFFSetFieldBit(tif,FIELD_JPEGTABLES); + tif->tif_flags |= TIFF_DIRTYDIRECT; + } + else sp->jpegtables = 0; /* Don't simulate "JPEGTables" */ + if ( CALLJPEG(sp,-1,jpeg_read_header(&sp->cinfo.d,TRUE)) + != JPEG_HEADER_OK + ) return 0; + if ( sp->cinfo.d.image_width != segment_width + || sp->cinfo.d.image_height != td->td_imagelength + ) + { + TIFFError(module,"Improper JPEG strip/tile size"); + return 0; + }; + if (sp->cinfo.d.num_components != td->td_samplesperpixel) + { + TIFFError(module,"Improper JPEG component count"); + return 0; + }; + if (sp->cinfo.d.data_precision != td->td_bitspersample) + { + TIFFError(module,"Improper JPEG data precision"); + return 0; + }; + + /* Check that JPEG image components all have the same subsampling factors + declared (or defaulted) in the TIFF file, since TIFF Version 6.0 is more + restrictive than JPEG: Only the 0th component may have horizontal and + vertical subsampling factors other than <1,1>. + */ + subsampling_factors = sp->h_sampling << 3 | sp->v_sampling; + i = 0; + do + { + if ( ( sp->cinfo.d.comp_info[i].h_samp_factor << 3 + | sp->cinfo.d.comp_info[i].v_samp_factor + ) + != subsampling_factors + ) + { + TIFFError(module,"Improper JPEG subsampling factors"); + return 0; + }; + subsampling_factors = 011; /* Required for image components > 0 */ + } + while (++i < sp->cinfo.d.num_components); + } + else /* not JFIF image */ + { int (*save)(j_decompress_ptr cinfo) = sp->cinfo.d.marker->read_markers; + register int i; + + /* We're not assuming that this file's JPEG bit stream has any header + "metadata", so fool the JPEG Library into thinking that we read a + "Start of Input" (SOI) marker and a "Start of Frame" (SOFx) marker, then + force it to read a simulated "Start of Scan" (SOS) marker when we call + "jpeg_read_header()" below. This should cause the JPEG Library to + establish reasonable defaults. + */ + sp->cinfo.d.marker->saw_SOI = /* Pretend we saw SOI marker */ + sp->cinfo.d.marker->saw_SOF = TRUE; /* Pretend we saw SOF marker */ + sp->cinfo.d.marker->read_markers = + sp->is_WANG ? suspend : fake_SOS_marker; + sp->cinfo.d.global_state = DSTATE_INHEADER; + sp->cinfo.d.Se = DCTSIZE2-1; /* Suppress JPEG Library warning */ + sp->cinfo.d.image_width = segment_width; + sp->cinfo.d.image_height = td->td_imagelength; + + /* The following color-space initialization, including the complicated + "switch"-statement below, essentially duplicates the logic used by the + JPEG Library's "jpeg_init_colorspace()" subroutine during compression. + */ + sp->cinfo.d.num_components = td->td_samplesperpixel; + sp->cinfo.d.comp_info = (jpeg_component_info *) + (*sp->cinfo.d.mem->alloc_small) + ( &sp->cinfo.comm + , JPOOL_IMAGE + , sp->cinfo.d.num_components * sizeof *sp->cinfo.d.comp_info + ); + i = 0; + do + { + sp->cinfo.d.comp_info[i].component_index = i; + sp->cinfo.d.comp_info[i].component_needed = TRUE; + sp->cinfo.d.cur_comp_info[i] = &sp->cinfo.d.comp_info[i]; + } + while (++i < sp->cinfo.d.num_components); + switch (jpeg_color_space) + { + case JCS_UNKNOWN : + i = 0; + do + { + sp->cinfo.d.comp_info[i].component_id = i; + sp->cinfo.d.comp_info[i].h_samp_factor = + sp->cinfo.d.comp_info[i].v_samp_factor = 1; + } + while (++i < sp->cinfo.d.num_components); + break; + case JCS_GRAYSCALE: + sp->cinfo.d.comp_info[0].component_id = + sp->cinfo.d.comp_info[0].h_samp_factor = + sp->cinfo.d.comp_info[0].v_samp_factor = 1; + break; + case JCS_RGB : + sp->cinfo.d.comp_info[0].component_id = 'R'; + sp->cinfo.d.comp_info[1].component_id = 'G'; + sp->cinfo.d.comp_info[2].component_id = 'B'; + i = 0; + do sp->cinfo.d.comp_info[i].h_samp_factor = + sp->cinfo.d.comp_info[i].v_samp_factor = 1; + while (++i < sp->cinfo.d.num_components); + break; + case JCS_CMYK : + sp->cinfo.d.comp_info[0].component_id = 'C'; + sp->cinfo.d.comp_info[1].component_id = 'M'; + sp->cinfo.d.comp_info[2].component_id = 'Y'; + sp->cinfo.d.comp_info[3].component_id = 'K'; + i = 0; + do sp->cinfo.d.comp_info[i].h_samp_factor = + sp->cinfo.d.comp_info[i].v_samp_factor = 1; + while (++i < sp->cinfo.d.num_components); + break; + case JCS_YCbCr : + i = 0; + do + { + sp->cinfo.d.comp_info[i].component_id = i+1; + sp->cinfo.d.comp_info[i].h_samp_factor = + sp->cinfo.d.comp_info[i].v_samp_factor = 1; + sp->cinfo.d.comp_info[i].quant_tbl_no = + sp->cinfo.d.comp_info[i].dc_tbl_no = + sp->cinfo.d.comp_info[i].ac_tbl_no = i > 0; + } + while (++i < sp->cinfo.d.num_components); + sp->cinfo.d.comp_info[0].h_samp_factor = sp->h_sampling; + sp->cinfo.d.comp_info[0].v_samp_factor = sp->v_sampling; + }; + sp->cinfo.d.comps_in_scan = td->td_planarconfig == PLANARCONFIG_CONTIG + ? sp->cinfo.d.num_components + : 1; + i = CALLJPEG(sp,-1,jpeg_read_header(&sp->cinfo.d,!sp->is_WANG)); + sp->cinfo.d.marker->read_markers = save; /* Restore input method */ + if (sp->is_WANG) /* produced by Wang Imaging on Microsoft Windows */ + { + if (i != JPEG_SUSPENDED) return 0; + + /* BOGOSITY ALERT! Files prooduced by the Wang Imaging application for + Microsoft Windows are a special--and, technically + illegal--case. A JPEG SOS marker and rest of the data stream should + be located at the end of the file, in a position identified by the + 0th Strip offset. + */ + i = td->td_nstrips - 1; + sp->src.next_input_byte = tif->tif_base + td->td_stripoffset[0]; + sp->src.bytes_in_buffer = td->td_stripoffset[i] - + td->td_stripoffset[0] + td->td_stripbytecount[i]; + i = CALLJPEG(sp,-1,jpeg_read_header(&sp->cinfo.d,TRUE)); + }; + if (i != JPEG_HEADER_OK) return 0; + }; + + /* Some of our initialization must wait until the JPEG Library is initialized + above, in order to override its defaults. + */ + if ( (sp->cinfo.d.raw_data_out = downsampled_output) + && !alloc_downsampled_buffers(tif,sp->cinfo.d.comp_info, + sp->cinfo.d.num_components) + ) return 0; + sp->cinfo.d.jpeg_color_space = jpeg_color_space; + sp->cinfo.d.out_color_space = out_color_space; + sp->cinfo.d.dither_mode = JDITHER_NONE; /* Reduce image "noise" */ + sp->cinfo.d.two_pass_quantize = FALSE; + + /* If the image consists of separate, discontiguous TIFF "samples" (= color + planes, hopefully = JPEG "scans"), then we must use the JPEG Library's + "buffered image" mode to decompress the entire image into temporary buffers, + because the JPEG Library must parse the entire JPEG bit-stream in order to + be satsified that it has a complete set of color components for each pixel, + but the TIFF Library must allow our client to extract 1 component at a time. + Initializing the JPEG Library's "buffered image" mode is tricky: First, we + start its decompressor, then we tell the decompressor to "consume" (i.e., + buffer) the entire bit-stream. + + WARNING: Disabling "fancy" up-sampling seems to slightly reduce "noise" for + certain old Wang Imaging files, but it absolutely *must* be + enabled if the image has separate color planes, since in that case, the JPEG + Library doesn't use an "sp->cinfo.d.cconvert" structure (so de-referencing + this pointer below will cause a fatal crash) but writing our own code to up- + sample separate color planes is too much work for right now. Maybe someday? + */ + sp->cinfo.d.do_fancy_upsampling = /* Always let this default (to TRUE)? */ + sp->cinfo.d.buffered_image = td->td_planarconfig == PLANARCONFIG_SEPARATE; + if (!CALLJPEG(sp,0,jpeg_start_decompress(&sp->cinfo.d))) return 0; + if (sp->cinfo.d.buffered_image) /* separate color planes */ + { + if (sp->cinfo.d.raw_data_out) + tif->tif_decoderow = tif->tif_decodestrip = tif->tif_decodetile = + OJPEGDecodeRawSeparate; + else + { + tif->tif_decoderow = tif->tif_decodestrip = tif->tif_decodetile = + OJPEGDecode; + + /* In JPEG Library Version 6B, color-space conversion isn't implemented + for separate color planes, so we must do it ourself if our TIFF + client doesn't want to: + */ + sp->cinfo.d.cconvert->color_convert = + sp->cinfo.d.jpeg_color_space == sp->cinfo.d.out_color_space + ? null_convert : ycc_rgb_convert; + }; + L3: switch (CALLJPEG(sp,0,jpeg_consume_input(&sp->cinfo.d))) + { + default : goto L3; + + /* If no JPEG "End of Information" (EOI) marker is found when bit- + stream parsing ends, check whether we have enough data to proceed + before reporting an error. + */ + case JPEG_SUSPENDED : if ( sp->cinfo.d.input_scan_number + *sp->cinfo.d.image_height + + sp->cinfo.d.input_iMCU_row + *sp->cinfo.d.max_v_samp_factor +# ifdef D_LOSSLESS_SUPPORTED + *sp->cinfo.d.data_units_in_MCU + *sp->cinfo.d.min_codec_data_unit +# else + *sp->cinfo.d.blocks_in_MCU + *DCTSIZE +# endif + < td->td_samplesperpixel + *sp->cinfo.d.image_height + ) + { + TIFFError(tif->tif_name, + "Premature end of JPEG bit-stream"); + return 0; + } + case JPEG_REACHED_EOI: ; + } + } + else /* pixel-interleaved color planes */ + tif->tif_decoderow = tif->tif_decodestrip = tif->tif_decodetile = + downsampled_output ? OJPEGDecodeRawContig : OJPEGDecode; + return 1; +# undef td + } -#ifndef LIBJPEG_ENCAP_EXTERNAL -static void -jpeg_encap_unwind(TIFF* tif) -{ - OJPEGState* sp=(OJPEGState*)tif->tif_data; - LONGJMP(sp->exit_jmpbuf,1); -} -#endif +static int +OJPEGPreDecode(register TIFF *tif,tsample_t s) + { register OJPEGState *sp = OJState(tif); +# define td (&tif->tif_dir) + + /* If we are about to read the first row of an image plane (hopefully, these + are coincident with JPEG "scans"!), reset the JPEG Library's decompressor + appropriately. Otherwise, let the decompressor run "as is" and return a + "success" status without further ado. + */ + if ( (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip) + % td->td_stripsperimage + == 0 + ) + { + if ( sp->cinfo.d.buffered_image + && !CALLJPEG(sp,0,jpeg_start_output(&sp->cinfo.d,s+1)) + ) return 0; + sp->cinfo.d.output_scanline = 0; + + /* Mark subsampling buffers "empty". */ + +# ifdef D_LOSSLESS_SUPPORTED + sp->scancount = sp->cinfo.d.min_codec_data_unit; +# else + sp->scancount = DCTSIZE; +# endif + }; + return 1; +# undef td + } + +/*ARGSUSED*/ static void +OJPEGPostDecode(register TIFF *tif,tidata_t buf,tsize_t cc) + { register OJPEGState *sp = OJState(tif); +# define td (&tif->tif_dir) + + /* The JPEG Library decompressor has reached the end of a strip/tile. If this + is the end of a TIFF image "sample" (= JPEG "scan") in a file with separate + components (color planes), then end the "scan". If it ends the image's last + sample/scan, then also stop the JPEG Library's decompressor. + */ + if (sp->cinfo.d.output_scanline >= sp->cinfo.d.output_height) + { + if (sp->cinfo.d.buffered_image) + CALLJPEG(sp,-1,jpeg_finish_output(&sp->cinfo.d)); /* End JPEG scan */ + if ( (isTiled(tif) ? tif->tif_curtile : tif->tif_curstrip) + >= td->td_nstrips-1 + ) CALLJPEG(sp,0,jpeg_finish_decompress(&sp->cinfo.d)); + } +# undef td + } -static void -OJPEGLibjpegJpegErrorMgrOutputMessage(jpeg_common_struct* cinfo) +static int +OJPEGVSetField(register TIFF *tif,ttag_t tag,va_list ap) { - char buffer[JMSG_LENGTH_MAX]; - (*cinfo->err->format_message)(cinfo,buffer); - TIFFWarningExt(((TIFF*)(cinfo->client_data))->tif_clientdata,"LibJpeg", "%s", buffer); -} + uint32 v32; + register OJPEGState *sp = OJState(tif); +# define td (&tif->tif_dir) + toff_t tiffoff=0; + uint32 bufoff=0; + uint32 code_count=0; + int i2=0; + int k2=0; + + switch (tag) + { + default : return + (*sp->vsetparent)(tif,tag,ap); + + /* BEWARE OF KLUDGE: Some old-format JPEG-in-TIFF files, including those + produced by the Wang Imaging application for Micro- + soft Windows, illegally omit a "ReferenceBlackWhite" TIFF tag, even + though the TIFF specification's default is intended for the RGB color + space and is inappropriate for the YCbCr color space ordinarily used for + JPEG images. Since many TIFF client applications request the value of + this tag immediately after a TIFF image directory is parsed, and before + any other code in this module receives control, we are forced to fix + this problem very early in image-file processing. Fortunately, legal + TIFF files are supposed to store their tags in numeric order, so a + mandatory "PhotometricInterpretation" tag should always appear before + an optional "ReferenceBlackWhite" tag. Hence, we slyly peek ahead when + we discover the desired photometry, by installing modified black and + white reference levels. + */ + case TIFFTAG_PHOTOMETRIC : + if ( (v32 = (*sp->vsetparent)(tif,tag,ap)) + && td->td_photometric == PHOTOMETRIC_YCBCR + ) + { + float *ref; + if (!TIFFGetField(tif, TIFFTAG_REFERENCEBLACKWHITE, &ref)) { + float refbw[6]; + long top = 1L << td->td_bitspersample; + refbw[0] = 0; + refbw[1] = (float)(top-1L); + refbw[2] = (float)(top>>1); + refbw[3] = refbw[1]; + refbw[4] = refbw[2]; + refbw[5] = refbw[1]; + TIFFSetField(tif, TIFFTAG_REFERENCEBLACKWHITE, refbw); + } + } + return v32; + + /* BEWARE OF KLUDGE: According to Charles Auer <Bumble731@msn.com>, if our + input is a multi-image (multi-directory) JPEG-in-TIFF + file is produced by the Wang Imaging application on Microsoft Windows, + for some reason the first directory excludes the vendor-specific "WANG + PageControl" tag (32934) that we check below, so the only other way to + identify these directories is apparently to look for a software- + identification tag with the substring, "Wang Labs". Single-image files + can apparently pass both tests, which causes no harm here, but what a + mess this is! + */ + case TIFFTAG_SOFTWARE : + { + char *software; + + v32 = (*sp->vsetparent)(tif,tag,ap); + if( TIFFGetField( tif, TIFFTAG_SOFTWARE, &software ) + && strstr( software, "Wang Labs" ) ) + sp->is_WANG = 1; + return v32; + } + + case TIFFTAG_JPEGPROC : + case TIFFTAG_JPEGIFOFFSET : + case TIFFTAG_JPEGIFBYTECOUNT : + case TIFFTAG_JPEGRESTARTINTERVAL : + case TIFFTAG_JPEGLOSSLESSPREDICTORS: + case TIFFTAG_JPEGPOINTTRANSFORM : + case TIFFTAG_JPEGQTABLES : + case TIFFTAG_JPEGDCTABLES : + case TIFFTAG_JPEGACTABLES : + case TIFFTAG_WANG_PAGECONTROL : + case TIFFTAG_JPEGCOLORMODE : ; + }; + v32 = va_arg(ap,uint32); /* No. of values in this TIFF record */ + + /* This switch statement is added for OJPEGVSetField */ + if(v32 !=0){ + switch(tag){ + case TIFFTAG_JPEGPROC: + sp->jpegproc=v32; + break; + case TIFFTAG_JPEGIFOFFSET: + sp->jpegifoffset=v32; + break; + case TIFFTAG_JPEGIFBYTECOUNT: + sp->jpegifbytecount=v32; + break; + case TIFFTAG_JPEGRESTARTINTERVAL: + sp->jpegrestartinterval=v32; + break; + case TIFFTAG_JPEGLOSSLESSPREDICTORS: + sp->jpeglosslesspredictors_length=v32; + break; + case TIFFTAG_JPEGPOINTTRANSFORM: + sp->jpegpointtransform_length=v32; + break; + case TIFFTAG_JPEGQTABLES: + sp->jpegqtables_length=v32; + break; + case TIFFTAG_JPEGACTABLES: + sp->jpegactables_length=v32; + break; + case TIFFTAG_JPEGDCTABLES: + sp->jpegdctables_length=v32; + break; + default: + break; + } + } + + /* BEWARE: The following actions apply only if we are reading a "source" TIFF + image to be decompressed for a client application program. If we + ever enhance this file's CODEC to write "destination" JPEG-in-TIFF images, + we'll need an "if"- and another "switch"-statement below, because we'll + probably want to store these records' values in some different places. Most + of these need not be parsed here in order to decode JPEG bit stream, so we + set boolean flags to note that they have been seen, but we otherwise ignore + them. + */ + switch (tag) + { JHUFF_TBL **h; + + /* Validate the JPEG-process code. */ + + case TIFFTAG_JPEGPROC : + switch (v32) + { + default : TIFFError(tif->tif_name, + "Unknown JPEG process"); + return 0; +# ifdef C_LOSSLESS_SUPPORTED + + /* Image uses (lossy) baseline sequential coding. */ + + case JPEGPROC_BASELINE: sp->cinfo.d.process = JPROC_SEQUENTIAL; + sp->cinfo.d.data_unit = DCTSIZE; + break; + + /* Image uses (lossless) Huffman coding. */ + + case JPEGPROC_LOSSLESS: sp->cinfo.d.process = JPROC_LOSSLESS; + sp->cinfo.d.data_unit = 1; +# else /* not C_LOSSLESS_SUPPORTED */ + case JPEGPROC_LOSSLESS: TIFFError(JPEGLib_name, + "Does not support lossless Huffman coding"); + return 0; + case JPEGPROC_BASELINE: ; +# endif /* C_LOSSLESS_SUPPORTED */ + }; + break; + + /* The TIFF Version 6.0 specification says that if the value of a TIFF + "JPEGInterchangeFormat" record is 0, then we are to behave as if this + record were absent; i.e., the data does *not* represent a JPEG Inter- + change Format File (JFIF), so don't even set the boolean "I've been + here" flag below. Otherwise, the field's value represents the file + offset of the JPEG SOI marker. + */ + case TIFFTAG_JPEGIFOFFSET : + if (v32) + { + sp->src.next_input_byte = tif->tif_base + v32; + break; + }; + return 1; + case TIFFTAG_JPEGIFBYTECOUNT : + sp->src.bytes_in_buffer = v32; + break; + + /* The TIFF Version 6.0 specification says that if the JPEG "Restart" + marker interval is 0, then the data has no "Restart" markers; i.e., we + must behave as if this TIFF record were absent. So, don't even set the + boolean "I've been here" flag below. + */ + /* + * Instead, set the field bit so TIFFGetField can get whether or not + * it was set. + */ + case TIFFTAG_JPEGRESTARTINTERVAL : + if (v32) + sp->cinfo.d.restart_interval = v32; + break; + /* The TIFF Version 6.0 specification says that this tag is supposed to be + a vector containing a value for each image component, but for lossless + Huffman coding (the only JPEG process defined by the specification for + which this tag should be needed), ISO IS 10918-1 uses only a single + value, equivalent to the "Ss" field in a JPEG bit-stream's "Start of + Scan" (SOS) marker. So, we extract the first vector element and ignore + the rest. (I hope this is correct!) + */ + case TIFFTAG_JPEGLOSSLESSPREDICTORS: + if (v32) + { + sp->cinfo.d.Ss = *va_arg(ap,uint16 *); + sp->jpeglosslesspredictors = + _TIFFmalloc(sp->jpeglosslesspredictors_length + * sizeof(uint16)); + if(sp->jpeglosslesspredictors==NULL){return(0);} + for(i2=0;i2<sp->jpeglosslesspredictors_length;i2++){ + ((uint16*)sp->jpeglosslesspredictors)[i2] = + ((uint16*)sp->cinfo.d.Ss)[i2]; + } + sp->jpeglosslesspredictors_length*=sizeof(uint16); + break; + }; + return v32; + + /* The TIFF Version 6.0 specification says that this tag is supposed to be + a vector containing a value for each image component, but for lossless + Huffman coding (the only JPEG process defined by the specification for + which this tag should be needed), ISO IS 10918-1 uses only a single + value, equivalent to the "Al" field in a JPEG bit-stream's "Start of + Scan" (SOS) marker. So, we extract the first vector element and ignore + the rest. (I hope this is correct!) + */ + case TIFFTAG_JPEGPOINTTRANSFORM : + if (v32) + { + sp->cinfo.d.Al = *va_arg(ap,uint16 *); + sp->jpegpointtransform = + _TIFFmalloc(sp->jpegpointtransform_length*sizeof(uint16)); + if(sp->jpegpointtransform==NULL){return(0);} + for(i2=0;i2<sp->jpegpointtransform_length;i2++) { + ((uint16*)sp->jpegpointtransform)[i2] = + ((uint16*)sp->cinfo.d.Al)[i2]; + } + sp->jpegpointtransform_length*=sizeof(uint16); + break; + } + return v32; + + /* We have a vector of offsets to quantization tables, so load 'em! */ + + case TIFFTAG_JPEGQTABLES : + if (v32) + { uint32 *v; + int i; + if (v32 > NUM_QUANT_TBLS) + { + TIFFError(tif->tif_name,"Too many quantization tables"); + return 0; + }; + i = 0; + v = va_arg(ap,uint32 *); + sp->jpegqtables=_TIFFmalloc(64*sp->jpegqtables_length); + if(sp->jpegqtables==NULL){return(0);} + tiffoff = TIFFSeekFile(tif, 0, SEEK_CUR); + bufoff=0; + for(i2=0;i2<sp->jpegqtables_length;i2++){ + TIFFSeekFile(tif, v[i2], SEEK_SET); + TIFFReadFile(tif, &(((unsigned char*)(sp->jpegqtables))[bufoff]), + 64); + bufoff+=64; + } + sp->jpegqtables_length=bufoff; + TIFFSeekFile(tif, tiffoff, SEEK_SET); + + do /* read quantization table */ + { register UINT8 *from = tif->tif_base + *v++; + register UINT16 *to; + register int j = DCTSIZE2; + + if (!( sp->cinfo.d.quant_tbl_ptrs[i] + = CALLJPEG(sp,0,jpeg_alloc_quant_table(&sp->cinfo.comm)) + ) + ) + { + TIFFError(JPEGLib_name,"No space for quantization table"); + return 0; + }; + to = sp->cinfo.d.quant_tbl_ptrs[i]->quantval; + do *to++ = *from++; while (--j > 0); + } + while (++i < v32); + sp->jpegtablesmode |= JPEGTABLESMODE_QUANT; + }; + break; + + /* We have a vector of offsets to DC Huffman tables, so load 'em! */ + + case TIFFTAG_JPEGDCTABLES : + h = sp->cinfo.d.dc_huff_tbl_ptrs; + goto L; + + /* We have a vector of offsets to AC Huffman tables, so load 'em! */ + + case TIFFTAG_JPEGACTABLES : + h = sp->cinfo.d.ac_huff_tbl_ptrs; + L: if (v32) + { uint32 *v; + int i; + if (v32 > NUM_HUFF_TBLS) + { + TIFFError(tif->tif_name,"Too many Huffman tables"); + return 0; + }; + v = va_arg(ap,uint32 *); + if(tag == TIFFTAG_JPEGDCTABLES) { + sp->jpegdctables=_TIFFmalloc(272*sp->jpegdctables_length); + if(sp->jpegdctables==NULL){return(0);} + tiffoff = TIFFSeekFile(tif, 0, SEEK_CUR); + bufoff=0; + code_count=0; + for(i2=0;i2<sp->jpegdctables_length;i2++){ + TIFFSeekFile(tif, v[i2], SEEK_SET); + TIFFReadFile(tif, + &(((unsigned char*)(sp->jpegdctables))[bufoff]), + 16); + code_count=0; + for(k2=0;k2<16;k2++){ + code_count+=((unsigned char*)(sp->jpegdctables))[k2+bufoff]; + } + TIFFReadFile(tif, + &(((unsigned char*)(sp->jpegdctables))[bufoff+16]), + code_count); + bufoff+=16; + bufoff+=code_count; + } + sp->jpegdctables_length=bufoff; + TIFFSeekFile(tif, tiffoff, SEEK_SET); + } + if(tag==TIFFTAG_JPEGACTABLES){ + sp->jpegactables=_TIFFmalloc(272*sp->jpegactables_length); + if(sp->jpegactables==NULL){return(0);} + tiffoff = TIFFSeekFile(tif, 0, SEEK_CUR); + bufoff=0; + code_count=0; + for(i2=0;i2<sp->jpegactables_length;i2++){ + TIFFSeekFile(tif, v[i2], SEEK_SET); + TIFFReadFile(tif, &(((unsigned char*)(sp->jpegactables))[bufoff]), 16); + code_count=0; + for(k2=0;k2<16;k2++){ + code_count+=((unsigned char*)(sp->jpegactables))[k2+bufoff]; + } + TIFFReadFile(tif, &(((unsigned char*)(sp->jpegactables))[bufoff+16]), code_count); + bufoff+=16; + bufoff+=code_count; + } + sp->jpegactables_length=bufoff; + TIFFSeekFile(tif, tiffoff, SEEK_SET); + } + i = 0; + do /* copy each Huffman table */ + { int size = 0; + register UINT8 *from = tif->tif_base + *v++, *to; + register int j = sizeof (*h)->bits; + + /* WARNING: This code relies on the fact that an image file not + "memory mapped" was read entirely into a single + buffer by "TIFFInitOJPEG()", so we can do a fast memory-to- + memory copy here. Each table consists of 16 Bytes, which are + suffixed to a 0 Byte when copied, followed by a variable + number of Bytes whose length is the sum of the first 16. + */ + if (!( *h + = CALLJPEG(sp,0,jpeg_alloc_huff_table(&sp->cinfo.comm)) + ) + ) + { + TIFFError(JPEGLib_name,"No space for Huffman table"); + return 0; + }; + to = (*h++)->bits; + *to++ = 0; + while (--j > 0) size += *to++ = *from++; /* Copy 16 Bytes */ + if (size > sizeof (*h)->huffval/sizeof *(*h)->huffval) + { + TIFFError(tif->tif_name,"Huffman table too big"); + return 0; + }; + if ((j = size) > 0) do *to++ = *from++; while (--j > 0); + while (++size <= sizeof (*h)->huffval/sizeof *(*h)->huffval) + *to++ = 0; /* Zero the rest of the table for cleanliness */ + } + while (++i < v32); + sp->jpegtablesmode |= JPEGTABLESMODE_HUFF; + }; + break; + + /* The following vendor-specific TIFF tag occurs in (highly illegal) files + produced by the Wang Imaging application for Microsoft Windows. These + can apparently have several "pages", in which case this tag specifies + the offset of a "page control" structure, which we don't currently know + how to handle. 0 indicates a 1-page image with no "page control", which + we make a feeble effort to handle. + */ + case TIFFTAG_WANG_PAGECONTROL : + if (v32 == 0) v32 = -1; + sp->is_WANG = v32; + tag = TIFFTAG_JPEGPROC+FIELD_WANG_PAGECONTROL-FIELD_JPEGPROC; + break; + + /* This pseudo tag indicates whether our caller is expected to do YCbCr <-> + RGB color-space conversion (JPEGCOLORMODE_RAW <=> 0) or whether we must + ask the JPEG Library to do it (JPEGCOLORMODE_RGB <=> 1). + */ + case TIFFTAG_JPEGCOLORMODE : + sp->jpegcolormode = v32; + + /* Mark the image to indicate whether returned data is up-sampled, so + that "TIFF{Strip,Tile}Size()" reflect the true amount of data present. + */ + v32 = tif->tif_flags; /* Save flags temporarily */ + tif->tif_flags &= ~TIFF_UPSAMPLED; + if ( td->td_photometric == PHOTOMETRIC_YCBCR + && (td->td_ycbcrsubsampling[0]<<3 | td->td_ycbcrsubsampling[1]) + != 011 + && sp->jpegcolormode == JPEGCOLORMODE_RGB + ) tif->tif_flags |= TIFF_UPSAMPLED; + + /* If the up-sampling state changed, re-calculate tile size. */ + + if ((tif->tif_flags ^ v32) & TIFF_UPSAMPLED) + { + tif->tif_tilesize = isTiled(tif) ? TIFFTileSize(tif) : (tsize_t) -1; + tif->tif_flags |= TIFF_DIRTYDIRECT; + }; + return 1; + }; + TIFFSetFieldBit(tif,tag-TIFFTAG_JPEGPROC+FIELD_JPEGPROC); + return 1; +# undef td + } -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 int +OJPEGVGetField(register TIFF *tif,ttag_t tag,va_list ap) + { register OJPEGState *sp = OJState(tif); + + switch (tag) + { + + /* If this file has managed to synthesize a set of consolidated "metadata" + tables for the current (post-TIFF Version 6.0 specification) JPEG-in- + TIFF encapsulation strategy, then tell our caller about them; otherwise, + keep mum. + */ + case TIFFTAG_JPEGTABLES : + if (sp->jpegtables_length) /* we have "new"-style JPEG tables */ + { + *va_arg(ap,uint32 *) = sp->jpegtables_length; + *va_arg(ap,char **) = sp->jpegtables; + return 1; + }; + + /* This pseudo tag indicates whether our caller is expected to do YCbCr <-> + RGB color-space conversion (JPEGCOLORMODE_RAW <=> 0) or whether we must + ask the JPEG Library to do it (JPEGCOLORMODE_RGB <=> 1). + */ + case TIFFTAG_JPEGCOLORMODE : + *va_arg(ap,uint32 *) = sp->jpegcolormode; + return 1; + + /* The following tags are defined by the TIFF Version 6.0 specification + and are obsolete. If our caller asks for information about them, do not + return anything, even if we parsed them in an old-format "source" image. + */ + case TIFFTAG_JPEGPROC : + *va_arg(ap, uint16*)=sp->jpegproc; + return(1); + break; + case TIFFTAG_JPEGIFOFFSET : + *va_arg(ap, uint32*)=sp->jpegifoffset; + return(1); + break; + case TIFFTAG_JPEGIFBYTECOUNT : + *va_arg(ap, uint32*)=sp->jpegifbytecount; + return(1); + break; + case TIFFTAG_JPEGRESTARTINTERVAL : + *va_arg(ap, uint32*)=sp->jpegrestartinterval; + return(1); + break; + case TIFFTAG_JPEGLOSSLESSPREDICTORS: + *va_arg(ap, uint32*)=sp->jpeglosslesspredictors_length; + *va_arg(ap, void**)=sp->jpeglosslesspredictors; + return(1); + break; + case TIFFTAG_JPEGPOINTTRANSFORM : + *va_arg(ap, uint32*)=sp->jpegpointtransform_length; + *va_arg(ap, void**)=sp->jpegpointtransform; + return(1); + break; + case TIFFTAG_JPEGQTABLES : + *va_arg(ap, uint32*)=sp->jpegqtables_length; + *va_arg(ap, void**)=sp->jpegqtables; + return(1); + break; + case TIFFTAG_JPEGDCTABLES : + *va_arg(ap, uint32*)=sp->jpegdctables_length; + *va_arg(ap, void**)=sp->jpegdctables; + return(1); + break; + case TIFFTAG_JPEGACTABLES : + *va_arg(ap, uint32*)=sp->jpegactables_length; + *va_arg(ap, void**)=sp->jpegactables; + return(1); + break; + }; + return (*sp->vgetparent)(tif,tag,ap); + } 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); -} +OJPEGPrintDir(register TIFF *tif,FILE *fd,long flags) + { register OJPEGState *sp = OJState(tif); + + if ( ( flags + & (TIFFPRINT_JPEGQTABLES|TIFFPRINT_JPEGDCTABLES|TIFFPRINT_JPEGACTABLES) + ) + && sp->jpegtables_length + ) + fprintf(fd," JPEG Table Data: <present>, %lu bytes\n", + sp->jpegtables_length); + } + +static uint32 +OJPEGDefaultStripSize(register TIFF *tif,register uint32 s) + { register OJPEGState *sp = OJState(tif); +# define td (&tif->tif_dir) + + if ((s = (*sp->defsparent)(tif,s)) < td->td_imagelength) + { register tsize_t size = sp->cinfo.comm.is_decompressor +# ifdef D_LOSSLESS_SUPPORTED + ? sp->cinfo.d.min_codec_data_unit +# else + ? DCTSIZE +# endif +# ifdef C_LOSSLESS_SUPPORTED + : sp->cinfo.c.data_unit; +# else + : DCTSIZE; +# endif + + size = TIFFroundup(size,16); + s = TIFFroundup(s,td->td_ycbcrsubsampling[1]*size); + }; + return s; +# undef td + } 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); -} +OJPEGDefaultTileSize(register TIFF *tif,register uint32 *tw,register uint32 *th) + { register OJPEGState *sp = OJState(tif); + register tsize_t size; +# define td (&tif->tif_dir) + + size = sp->cinfo.comm.is_decompressor +# ifdef D_LOSSLESS_SUPPORTED + ? sp->cinfo.d.min_codec_data_unit +# else + ? DCTSIZE +# endif +# ifdef C_LOSSLESS_SUPPORTED + : sp->cinfo.c.data_unit; +# else + : DCTSIZE; +# endif + size = TIFFroundup(size,16); + (*sp->deftparent)(tif,tw,th); + *tw = TIFFroundup(*tw,td->td_ycbcrsubsampling[0]*size); + *th = TIFFroundup(*th,td->td_ycbcrsubsampling[1]*size); +# undef td + } static void -OJPEGLibjpegJpegSourceMgrTermSource(jpeg_decompress_struct* cinfo) -{ - (void)cinfo; -} - -#endif +OJPEGCleanUp(register TIFF *tif) + { register OJPEGState *sp; + + if ( (sp = OJState(tif)) ) + { + CALLVJPEG(sp,jpeg_destroy(&sp->cinfo.comm)); /* Free JPEG Lib. vars. */ + if (sp->jpegtables) {_TIFFfree(sp->jpegtables);sp->jpegtables=0;} + if (sp->jpeglosslesspredictors) { + _TIFFfree(sp->jpeglosslesspredictors); + sp->jpeglosslesspredictors = 0; + } + if (sp->jpegpointtransform) { + _TIFFfree(sp->jpegpointtransform); + sp->jpegpointtransform=0; + } + if (sp->jpegqtables) {_TIFFfree(sp->jpegqtables);sp->jpegqtables=0;} + if (sp->jpegactables) {_TIFFfree(sp->jpegactables);sp->jpegactables=0;} + if (sp->jpegdctables) {_TIFFfree(sp->jpegdctables);sp->jpegdctables=0;} + /* If the image file isn't "memory mapped" and we read it all into a + single, large memory buffer, free the buffer now. + */ + if (!isMapped(tif) && tif->tif_base) /* free whole-file buffer */ + { + _TIFFfree(tif->tif_base); + tif->tif_base = 0; + tif->tif_size = 0; + }; + _TIFFfree(sp); /* Release local variables */ + tif->tif_data = 0; + } + } +int +TIFFInitOJPEG(register TIFF *tif,int scheme) + { register OJPEGState *sp; +# define td (&tif->tif_dir) +# ifndef never + + /* This module supports a decompression-only CODEC, which is intended strictly + for viewing old image files using the obsolete JPEG-in-TIFF encapsulation + specified by the TIFF Version 6.0 specification. It does not, and never + should, support compression for new images. If a client application asks us + to, refuse and complain loudly! + */ + if (tif->tif_mode != O_RDONLY) return _notSupported(tif); +# endif /* never */ + if (!isMapped(tif)) + { + + /* BEWARE OF KLUDGE: If our host operating-system doesn't let an image + file be "memory mapped", then we want to read the + entire file into a single (possibly large) memory buffer as if it had + been "memory mapped". Although this is likely to waste space, because + analysis of the file's content might cause parts of it to be read into + smaller buffers duplicatively, it appears to be the lesser of several + evils. Very old JPEG-in-TIFF encapsulations aren't guaranteed to be + JFIF bit streams, or to have a TIFF "JPEGTables" record or much other + "metadata" to help us locate the decoding tables and entropy-coded data, + so we're likely do a lot of random-access grokking around, and we must + ultimately tell the JPEG Library to sequentially scan much of the file + anyway. This is all likely to be easier if we use "brute force" to + read the entire file, once, and don't use incremental disc I/O. If our + client application tries to process a file so big that we can't buffer + it entirely, then tough shit: we'll give up and exit! + */ + if (!(tif->tif_base = _TIFFmalloc(tif->tif_size=TIFFGetFileSize(tif)))) + { + TIFFError(tif->tif_name,"Cannot allocate file buffer"); + return 0; + }; + if (!SeekOK(tif,0) || !ReadOK(tif,tif->tif_base,tif->tif_size)) + { + TIFFError(tif->tif_name,"Cannot read file"); + return 0; + } + }; + + /* Allocate storage for this module's per-file variables. */ + + if (!(tif->tif_data = (tidata_t)_TIFFmalloc(sizeof *sp))) + { + TIFFError("TIFFInitOJPEG","No space for JPEG state block"); + return 0; + }; + (sp = OJState(tif))->tif = tif; /* Initialize reverse pointer */ + sp->cinfo.d.err = jpeg_std_error(&sp->err); /* Initialize error handling */ + sp->err.error_exit = TIFFojpeg_error_exit; + sp->err.output_message = TIFFojpeg_output_message; + if (!CALLVJPEG(sp,jpeg_create_decompress(&sp->cinfo.d))) return 0; + + /* Install CODEC-specific tag information and override default TIFF Library + "method" subroutines with our own, CODEC-specific methods. Like all good + members of an object-class, we save some of these subroutine pointers for + "fall back" in case our own methods fail. + */ + _TIFFMergeFieldInfo(tif,ojpegFieldInfo, + sizeof ojpegFieldInfo/sizeof *ojpegFieldInfo); + sp->defsparent = tif->tif_defstripsize; + sp->deftparent = tif->tif_deftilesize; + sp->vgetparent = tif->tif_tagmethods.vgetfield; + sp->vsetparent = tif->tif_tagmethods.vsetfield; + tif->tif_defstripsize = OJPEGDefaultStripSize; + tif->tif_deftilesize = OJPEGDefaultTileSize; + tif->tif_tagmethods.vgetfield = OJPEGVGetField; + tif->tif_tagmethods.vsetfield = OJPEGVSetField; + tif->tif_tagmethods.printdir = OJPEGPrintDir; +# ifdef never + tif->tif_setupencode = OJPEGSetupEncode; + tif->tif_preencode = OJPEGPreEncode; + tif->tif_postencode = OJPEGPostEncode; +# else /* well, hardly ever */ + tif->tif_setupencode = tif->tif_postencode = _notSupported; + tif->tif_preencode = (TIFFPreMethod)_notSupported; +# endif /* never */ + tif->tif_setupdecode = OJPEGSetupDecode; + tif->tif_predecode = OJPEGPreDecode; + tif->tif_postdecode = OJPEGPostDecode; + tif->tif_cleanup = OJPEGCleanUp; + + /* If the image file doesn't have "JPEGInterchangeFormat[Length]" TIFF records + to guide us, we have few clues about where its encapsulated JPEG bit stream + is located, so establish intelligent defaults: If the Image File Directory + doesn't immediately follow the TIFF header, assume that the JPEG data lies + in between; otherwise, assume that it follows the Image File Directory. + */ + if (tif->tif_header.tiff_diroff > sizeof tif->tif_header) + { + sp->src.next_input_byte = tif->tif_base + sizeof tif->tif_header; + sp->src.bytes_in_buffer = tif->tif_header.tiff_diroff + - sizeof tif->tif_header; + } + else /* this case is ugly! */ + { uint32 maxoffset = tif->tif_size; + uint16 dircount; + + /* Calculate the offset to the next Image File Directory, if there is one, + or to the end of the file, if not. Then arrange to read the file from + the end of the Image File Directory to that offset. + */ + if (tif->tif_nextdiroff) maxoffset = tif->tif_nextdiroff; /* Not EOF */ + _TIFFmemcpy(&dircount,(const tdata_t) + (sp->src.next_input_byte = tif->tif_base+tif->tif_header.tiff_diroff), + sizeof dircount); + if (tif->tif_flags & TIFF_SWAB) TIFFSwabShort(&dircount); + sp->src.next_input_byte += dircount*sizeof(TIFFDirEntry) + + sizeof maxoffset + sizeof dircount; + sp->src.bytes_in_buffer = tif->tif_base - sp->src.next_input_byte + + maxoffset; + }; + + /* IJG JPEG Library Version 6B can be configured for either 8- or 12-bit sample + precision, but we assume that "old JPEG" TIFF clients only need 8 bits. + */ + sp->cinfo.d.data_precision = 8; +# ifdef C_LOSSLESS_SUPPORTED + /* If the "JPEGProc" TIFF tag is missing from the Image File Dictionary, the + JPEG Library will use its (lossy) baseline sequential process by default. + */ + sp->cinfo.d.data_unit = DCTSIZE; +# endif /* C_LOSSLESS_SUPPORTED */ + + /* Initialize other CODEC-specific variables requiring default values. */ + + tif->tif_flags |= TIFF_NOBITREV; /* No bit-reversal within data bytes */ + sp->h_sampling = sp->v_sampling = 1; /* No subsampling by default */ + sp->is_WANG = 0; /* Assume not a MS Windows Wang Imaging file by default */ + sp->jpegtables = 0; /* No "new"-style JPEG tables synthesized yet */ + sp->jpegtables_length = 0; + sp->jpegquality = 75; /* Default IJG quality */ + sp->jpegcolormode = JPEGCOLORMODE_RAW; + sp->jpegtablesmode = 0; /* No tables found yet */ + sp->jpeglosslesspredictors=0; + sp->jpeglosslesspredictors_length=0; + sp->jpegpointtransform=0; + sp->jpegpointtransform_length=0; + sp->jpegqtables=0; + sp->jpegqtables_length=0; + sp->jpegdctables=0; + sp->jpegdctables_length=0; + sp->jpegactables=0; + sp->jpegactables_length=0; + return 1; +# undef td + } +#endif /* OJPEG_SUPPORT */ + +/* vim: set ts=8 sts=8 sw=8 noet: */ |