+++ /dev/null
-/* $Id: tif_fax3.c,v 1.1 2005/06/17 13:54:52 vp153 Exp $ */
-
-/*
- * Copyright (c) 1990-1997 Sam Leffler
- * Copyright (c) 1991-1997 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Sam Leffler and Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS 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.
- */
-
-#include "tiffiop.h"
-#ifdef CCITT_SUPPORT
-/*
- * TIFF Library.
- *
- * CCITT Group 3 (T.4) and Group 4 (T.6) Compression Support.
- *
- * This file contains support for decoding and encoding TIFF
- * compression algorithms 2, 3, 4, and 32771.
- *
- * Decoder support is derived, with permission, from the code
- * in Frank Cringle's viewfax program;
- * Copyright (C) 1990, 1995 Frank D. Cringle.
- */
-#include "tif_fax3.h"
-#define G3CODES
-#include "t4.h"
-#include <stdio.h>
-
-/*
- * Compression+decompression state blocks are
- * derived from this ``base state'' block.
- */
-typedef struct {
- int rw_mode; /* O_RDONLY for decode, else encode */
- int mode; /* operating mode */
- uint32 rowbytes; /* bytes in a decoded scanline */
- uint32 rowpixels; /* pixels in a scanline */
-
- uint16 cleanfaxdata; /* CleanFaxData tag */
- uint32 badfaxrun; /* BadFaxRun tag */
- uint32 badfaxlines; /* BadFaxLines tag */
- uint32 groupoptions; /* Group 3/4 options tag */
- uint32 recvparams; /* encoded Class 2 session params */
- char* subaddress; /* subaddress string */
- uint32 recvtime; /* time spent receiving (secs) */
- char* faxdcs; /* Table 2/T.30 encoded session params */
- TIFFVGetMethod vgetparent; /* super-class method */
- TIFFVSetMethod vsetparent; /* super-class method */
-} Fax3BaseState;
-#define Fax3State(tif) ((Fax3BaseState*) (tif)->tif_data)
-
-typedef enum { G3_1D, G3_2D } Ttag;
-typedef struct {
- Fax3BaseState b;
-
- /* Decoder state info */
- const unsigned char* bitmap; /* bit reversal table */
- uint32 data; /* current i/o byte/word */
- int bit; /* current i/o bit in byte */
- int EOLcnt; /* count of EOL codes recognized */
- TIFFFaxFillFunc fill; /* fill routine */
- uint32* runs; /* b&w runs for current/previous row */
- uint32* refruns; /* runs for reference line */
- uint32* curruns; /* runs for current line */
-
- /* Encoder state info */
- Ttag tag; /* encoding state */
- unsigned char* refline; /* reference line for 2d decoding */
- int k; /* #rows left that can be 2d encoded */
- int maxk; /* max #rows that can be 2d encoded */
-} Fax3CodecState;
-#define DecoderState(tif) ((Fax3CodecState*) Fax3State(tif))
-#define EncoderState(tif) ((Fax3CodecState*) Fax3State(tif))
-
-#define is2DEncoding(sp) \
- (sp->b.groupoptions & GROUP3OPT_2DENCODING)
-#define isAligned(p,t) ((((unsigned long)(p)) & (sizeof (t)-1)) == 0)
-
-/*
- * Group 3 and Group 4 Decoding.
- */
-
-/*
- * These macros glue the TIFF library state to
- * the state expected by Frank's decoder.
- */
-#define DECLARE_STATE(tif, sp, mod) \
- static const char module[] = mod; \
- Fax3CodecState* sp = DecoderState(tif); \
- int a0; /* reference element */ \
- int lastx = sp->b.rowpixels; /* last element in row */ \
- uint32 BitAcc; /* bit accumulator */ \
- int BitsAvail; /* # valid bits in BitAcc */ \
- int RunLength; /* length of current run */ \
- unsigned char* cp; /* next byte of input data */ \
- unsigned char* ep; /* end of input data */ \
- uint32* pa; /* place to stuff next run */ \
- uint32* thisrun; /* current row's run array */ \
- int EOLcnt; /* # EOL codes recognized */ \
- const unsigned char* bitmap = sp->bitmap; /* input data bit reverser */ \
- const TIFFFaxTabEnt* TabEnt
-#define DECLARE_STATE_2D(tif, sp, mod) \
- DECLARE_STATE(tif, sp, mod); \
- int b1; /* next change on prev line */ \
- uint32* pb /* next run in reference line */\
-/*
- * Load any state that may be changed during decoding.
- */
-#define CACHE_STATE(tif, sp) do { \
- BitAcc = sp->data; \
- BitsAvail = sp->bit; \
- EOLcnt = sp->EOLcnt; \
- cp = (unsigned char*) tif->tif_rawcp; \
- ep = cp + tif->tif_rawcc; \
-} while (0)
-/*
- * Save state possibly changed during decoding.
- */
-#define UNCACHE_STATE(tif, sp) do { \
- sp->bit = BitsAvail; \
- sp->data = BitAcc; \
- sp->EOLcnt = EOLcnt; \
- tif->tif_rawcc -= (tidata_t) cp - tif->tif_rawcp; \
- tif->tif_rawcp = (tidata_t) cp; \
-} while (0)
-
-/*
- * Setup state for decoding a strip.
- */
-static int
-Fax3PreDecode(TIFF* tif, tsample_t s)
-{
- Fax3CodecState* sp = DecoderState(tif);
-
- (void) s;
- assert(sp != NULL);
- sp->bit = 0; /* force initial read */
- sp->data = 0;
- sp->EOLcnt = 0; /* force initial scan for EOL */
- /*
- * Decoder assumes lsb-to-msb bit order. Note that we select
- * this here rather than in Fax3SetupState so that viewers can
- * hold the image open, fiddle with the FillOrder tag value,
- * and then re-decode the image. Otherwise they'd need to close
- * and open the image to get the state reset.
- */
- sp->bitmap =
- TIFFGetBitRevTable(tif->tif_dir.td_fillorder != FILLORDER_LSB2MSB);
- if (sp->refruns) { /* init reference line to white */
- sp->refruns[0] = (uint32) sp->b.rowpixels;
- sp->refruns[1] = 0;
- }
- return (1);
-}
-
-/*
- * Routine for handling various errors/conditions.
- * Note how they are "glued into the decoder" by
- * overriding the definitions used by the decoder.
- */
-
-static void
-Fax3Unexpected(const char* module, TIFF* tif, uint32 a0)
-{
- TIFFError(module, "%s: Bad code word at scanline %d (x %lu)",
- tif->tif_name, tif->tif_row, (unsigned long) a0);
-}
-#define unexpected(table, a0) Fax3Unexpected(module, tif, a0)
-
-static void
-Fax3Extension(const char* module, TIFF* tif, uint32 a0)
-{
- TIFFError(module,
- "%s: Uncompressed data (not supported) at scanline %d (x %lu)",
- tif->tif_name, tif->tif_row, (unsigned long) a0);
-}
-#define extension(a0) Fax3Extension(module, tif, a0)
-
-static void
-Fax3BadLength(const char* module, TIFF* tif, uint32 a0, uint32 lastx)
-{
- TIFFWarning(module, "%s: %s at scanline %d (got %lu, expected %lu)",
- tif->tif_name,
- a0 < lastx ? "Premature EOL" : "Line length mismatch",
- tif->tif_row, (unsigned long) a0, (unsigned long) lastx);
-}
-#define badlength(a0,lastx) Fax3BadLength(module, tif, a0, lastx)
-
-static void
-Fax3PrematureEOF(const char* module, TIFF* tif, uint32 a0)
-{
- TIFFWarning(module, "%s: Premature EOF at scanline %d (x %lu)",
- tif->tif_name, tif->tif_row, (unsigned long) a0);
-}
-#define prematureEOF(a0) Fax3PrematureEOF(module, tif, a0)
-
-#define Nop
-
-/*
- * Decode the requested amount of G3 1D-encoded data.
- */
-static int
-Fax3Decode1D(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
- DECLARE_STATE(tif, sp, "Fax3Decode1D");
-
- (void) s;
- CACHE_STATE(tif, sp);
- thisrun = sp->curruns;
- while ((long)occ > 0) {
- a0 = 0;
- RunLength = 0;
- pa = thisrun;
-#ifdef FAX3_DEBUG
- printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail);
- printf("-------------------- %d\n", tif->tif_row);
- fflush(stdout);
-#endif
- SYNC_EOL(EOF1D);
- EXPAND1D(EOF1Da);
- (*sp->fill)(buf, thisrun, pa, lastx);
- buf += sp->b.rowbytes;
- occ -= sp->b.rowbytes;
- continue;
- EOF1D: /* premature EOF */
- CLEANUP_RUNS();
- EOF1Da: /* premature EOF */
- (*sp->fill)(buf, thisrun, pa, lastx);
- UNCACHE_STATE(tif, sp);
- return (-1);
- }
- UNCACHE_STATE(tif, sp);
- return (1);
-}
-
-#define SWAP(t,a,b) { t x; x = (a); (a) = (b); (b) = x; }
-/*
- * Decode the requested amount of G3 2D-encoded data.
- */
-static int
-Fax3Decode2D(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
- DECLARE_STATE_2D(tif, sp, "Fax3Decode2D");
- int is1D; /* current line is 1d/2d-encoded */
-
- (void) s;
- CACHE_STATE(tif, sp);
- while ((long)occ > 0) {
- a0 = 0;
- RunLength = 0;
- pa = thisrun = sp->curruns;
-#ifdef FAX3_DEBUG
- printf("\nBitAcc=%08X, BitsAvail = %d EOLcnt = %d",
- BitAcc, BitsAvail, EOLcnt);
-#endif
- SYNC_EOL(EOF2D);
- NeedBits8(1, EOF2D);
- is1D = GetBits(1); /* 1D/2D-encoding tag bit */
- ClrBits(1);
-#ifdef FAX3_DEBUG
- printf(" %s\n-------------------- %d\n",
- is1D ? "1D" : "2D", tif->tif_row);
- fflush(stdout);
-#endif
- pb = sp->refruns;
- b1 = *pb++;
- if (is1D)
- EXPAND1D(EOF2Da);
- else
- EXPAND2D(EOF2Da);
- (*sp->fill)(buf, thisrun, pa, lastx);
- SETVAL(0); /* imaginary change for reference */
- SWAP(uint32*, sp->curruns, sp->refruns);
- buf += sp->b.rowbytes;
- occ -= sp->b.rowbytes;
- continue;
- EOF2D: /* premature EOF */
- CLEANUP_RUNS();
- EOF2Da: /* premature EOF */
- (*sp->fill)(buf, thisrun, pa, lastx);
- UNCACHE_STATE(tif, sp);
- return (-1);
- }
- UNCACHE_STATE(tif, sp);
- return (1);
-}
-#undef SWAP
-
-/*
- * The ZERO & FILL macros must handle spans < 2*sizeof(long) bytes.
- * For machines with 64-bit longs this is <16 bytes; otherwise
- * this is <8 bytes. We optimize the code here to reflect the
- * machine characteristics.
- */
-#if SIZEOF_LONG == 8
-# define FILL(n, cp) \
- switch (n) { \
- case 15:(cp)[14] = 0xff; case 14:(cp)[13] = 0xff; case 13: (cp)[12] = 0xff;\
- case 12:(cp)[11] = 0xff; case 11:(cp)[10] = 0xff; case 10: (cp)[9] = 0xff;\
- case 9: (cp)[8] = 0xff; case 8: (cp)[7] = 0xff; case 7: (cp)[6] = 0xff;\
- case 6: (cp)[5] = 0xff; case 5: (cp)[4] = 0xff; case 4: (cp)[3] = 0xff;\
- case 3: (cp)[2] = 0xff; case 2: (cp)[1] = 0xff; \
- case 1: (cp)[0] = 0xff; (cp) += (n); case 0: ; \
- }
-# define ZERO(n, cp) \
- switch (n) { \
- case 15:(cp)[14] = 0; case 14:(cp)[13] = 0; case 13: (cp)[12] = 0; \
- case 12:(cp)[11] = 0; case 11:(cp)[10] = 0; case 10: (cp)[9] = 0; \
- case 9: (cp)[8] = 0; case 8: (cp)[7] = 0; case 7: (cp)[6] = 0; \
- case 6: (cp)[5] = 0; case 5: (cp)[4] = 0; case 4: (cp)[3] = 0; \
- case 3: (cp)[2] = 0; case 2: (cp)[1] = 0; \
- case 1: (cp)[0] = 0; (cp) += (n); case 0: ; \
- }
-#else
-# define FILL(n, cp) \
- switch (n) { \
- case 7: (cp)[6] = 0xff; case 6: (cp)[5] = 0xff; case 5: (cp)[4] = 0xff; \
- case 4: (cp)[3] = 0xff; case 3: (cp)[2] = 0xff; case 2: (cp)[1] = 0xff; \
- case 1: (cp)[0] = 0xff; (cp) += (n); case 0: ; \
- }
-# define ZERO(n, cp) \
- switch (n) { \
- case 7: (cp)[6] = 0; case 6: (cp)[5] = 0; case 5: (cp)[4] = 0; \
- case 4: (cp)[3] = 0; case 3: (cp)[2] = 0; case 2: (cp)[1] = 0; \
- case 1: (cp)[0] = 0; (cp) += (n); case 0: ; \
- }
-#endif
-
-/*
- * Bit-fill a row according to the white/black
- * runs generated during G3/G4 decoding.
- */
-void
-_TIFFFax3fillruns(unsigned char* buf, uint32* runs, uint32* erun, uint32 lastx)
-{
- static const unsigned char _fillmasks[] =
- { 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff };
- unsigned char* cp;
- uint32 x, bx, run;
- int32 n, nw;
- long* lp;
-
- if ((erun-runs)&1)
- *erun++ = 0;
- x = 0;
- for (; runs < erun; runs += 2) {
- run = runs[0];
- if (x+run > lastx || run > lastx )
- run = runs[0] = (uint32) (lastx - x);
- if (run) {
- cp = buf + (x>>3);
- bx = x&7;
- if (run > 8-bx) {
- if (bx) { /* align to byte boundary */
- *cp++ &= 0xff << (8-bx);
- run -= 8-bx;
- }
- if( (n = run >> 3) != 0 ) { /* multiple bytes to fill */
- if ((n/sizeof (long)) > 1) {
- /*
- * Align to longword boundary and fill.
- */
- for (; n && !isAligned(cp, long); n--)
- *cp++ = 0x00;
- lp = (long*) cp;
- nw = (int32)(n / sizeof (long));
- n -= nw * sizeof (long);
- do {
- *lp++ = 0L;
- } while (--nw);
- cp = (unsigned char*) lp;
- }
- ZERO(n, cp);
- run &= 7;
- }
- if (run)
- cp[0] &= 0xff >> run;
- } else
- cp[0] &= ~(_fillmasks[run]>>bx);
- x += runs[0];
- }
- run = runs[1];
- if (x+run > lastx || run > lastx )
- run = runs[1] = lastx - x;
- if (run) {
- cp = buf + (x>>3);
- bx = x&7;
- if (run > 8-bx) {
- if (bx) { /* align to byte boundary */
- *cp++ |= 0xff >> bx;
- run -= 8-bx;
- }
- if( (n = run>>3) != 0 ) { /* multiple bytes to fill */
- if ((n/sizeof (long)) > 1) {
- /*
- * Align to longword boundary and fill.
- */
- for (; n && !isAligned(cp, long); n--)
- *cp++ = 0xff;
- lp = (long*) cp;
- nw = (int32)(n / sizeof (long));
- n -= nw * sizeof (long);
- do {
- *lp++ = -1L;
- } while (--nw);
- cp = (unsigned char*) lp;
- }
- FILL(n, cp);
- run &= 7;
- }
- if (run)
- cp[0] |= 0xff00 >> run;
- } else
- cp[0] |= _fillmasks[run]>>bx;
- x += runs[1];
- }
- }
- assert(x == lastx);
-}
-#undef ZERO
-#undef FILL
-
-static char *
-CheckMalloc(TIFF* tif, size_t nmemb, size_t elem_size, const char* what)
-{
- char *cp = NULL;
- tsize_t bytes = nmemb * elem_size;
-
- if (nmemb && elem_size && bytes / elem_size == nmemb)
- cp = (char*) _TIFFmalloc(bytes);
-
- if (cp == NULL)
- TIFFError(tif->tif_name, "No space %s", what);
-
- return (cp);
-}
-
-/*
- * Setup G3/G4-related compression/decompression state
- * before data is processed. This routine is called once
- * per image -- it sets up different state based on whether
- * or not decoding or encoding is being done and whether
- * 1D- or 2D-encoded data is involved.
- */
-static int
-Fax3SetupState(TIFF* tif)
-{
- TIFFDirectory* td = &tif->tif_dir;
- Fax3BaseState* sp = Fax3State(tif);
- long rowbytes, rowpixels;
- int needsRefLine;
- Fax3CodecState* dsp = (Fax3CodecState*) Fax3State(tif);
- uint32 nruns;
-
- if (td->td_bitspersample != 1) {
- TIFFError(tif->tif_name,
- "Bits/sample must be 1 for Group 3/4 encoding/decoding");
- return (0);
- }
- /*
- * Calculate the scanline/tile widths.
- */
- if (isTiled(tif)) {
- rowbytes = TIFFTileRowSize(tif);
- rowpixels = td->td_tilewidth;
- } else {
- rowbytes = TIFFScanlineSize(tif);
- rowpixels = td->td_imagewidth;
- }
- sp->rowbytes = (uint32) rowbytes;
- sp->rowpixels = (uint32) rowpixels;
- /*
- * Allocate any additional space required for decoding/encoding.
- */
- needsRefLine = (
- (sp->groupoptions & GROUP3OPT_2DENCODING) ||
- td->td_compression == COMPRESSION_CCITTFAX4
- );
-
- nruns = needsRefLine ? 2*TIFFroundup(rowpixels,32) : rowpixels;
-
- dsp->runs = (uint32*) CheckMalloc(tif, 2*nruns+3, sizeof (uint32),
- "for Group 3/4 run arrays");
- if (dsp->runs == NULL)
- return (0);
- dsp->curruns = dsp->runs;
- if (needsRefLine)
- dsp->refruns = dsp->runs + (nruns>>1);
- else
- dsp->refruns = NULL;
- if (td->td_compression == COMPRESSION_CCITTFAX3
- && is2DEncoding(dsp)) { /* NB: default is 1D routine */
- tif->tif_decoderow = Fax3Decode2D;
- tif->tif_decodestrip = Fax3Decode2D;
- tif->tif_decodetile = Fax3Decode2D;
- }
-
- if (needsRefLine) { /* 2d encoding */
- Fax3CodecState* esp = EncoderState(tif);
- /*
- * 2d encoding requires a scanline
- * buffer for the ``reference line''; the
- * scanline against which delta encoding
- * is referenced. The reference line must
- * be initialized to be ``white'' (done elsewhere).
- */
- esp->refline = (unsigned char*) _TIFFmalloc(rowbytes);
- if (esp->refline == NULL) {
- TIFFError("Fax3SetupState",
- "%s: No space for Group 3/4 reference line",
- tif->tif_name);
- return (0);
- }
- } else /* 1d encoding */
- EncoderState(tif)->refline = NULL;
-
- return (1);
-}
-
-/*
- * CCITT Group 3 FAX Encoding.
- */
-
-#define Fax3FlushBits(tif, sp) { \
- if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize) \
- (void) TIFFFlushData1(tif); \
- *(tif)->tif_rawcp++ = (tidataval_t) (sp)->data; \
- (tif)->tif_rawcc++; \
- (sp)->data = 0, (sp)->bit = 8; \
-}
-#define _FlushBits(tif) { \
- if ((tif)->tif_rawcc >= (tif)->tif_rawdatasize) \
- (void) TIFFFlushData1(tif); \
- *(tif)->tif_rawcp++ = (tidataval_t) data; \
- (tif)->tif_rawcc++; \
- data = 0, bit = 8; \
-}
-static const int _msbmask[9] =
- { 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff };
-#define _PutBits(tif, bits, length) { \
- while (length > bit) { \
- data |= bits >> (length - bit); \
- length -= bit; \
- _FlushBits(tif); \
- } \
- data |= (bits & _msbmask[length]) << (bit - length); \
- bit -= length; \
- if (bit == 0) \
- _FlushBits(tif); \
-}
-
-/*
- * Write a variable-length bit-value to
- * the output stream. Values are
- * assumed to be at most 16 bits.
- */
-static void
-Fax3PutBits(TIFF* tif, unsigned int bits, unsigned int length)
-{
- Fax3CodecState* sp = EncoderState(tif);
- unsigned int bit = sp->bit;
- int data = sp->data;
-
- _PutBits(tif, bits, length);
-
- sp->data = data;
- sp->bit = bit;
-}
-
-/*
- * Write a code to the output stream.
- */
-#define putcode(tif, te) Fax3PutBits(tif, (te)->code, (te)->length)
-
-#ifdef FAX3_DEBUG
-#define DEBUG_COLOR(w) (tab == TIFFFaxWhiteCodes ? w "W" : w "B")
-#define DEBUG_PRINT(what,len) { \
- int t; \
- printf("%08X/%-2d: %s%5d\t", data, bit, DEBUG_COLOR(what), len); \
- for (t = length-1; t >= 0; t--) \
- putchar(code & (1<<t) ? '1' : '0'); \
- putchar('\n'); \
-}
-#endif
-
-/*
- * Write the sequence of codes that describes
- * the specified span of zero's or one's. The
- * appropriate table that holds the make-up and
- * terminating codes is supplied.
- */
-static void
-putspan(TIFF* tif, int32 span, const tableentry* tab)
-{
- Fax3CodecState* sp = EncoderState(tif);
- unsigned int bit = sp->bit;
- int data = sp->data;
- unsigned int code, length;
-
- while (span >= 2624) {
- const tableentry* te = &tab[63 + (2560>>6)];
- code = te->code, length = te->length;
-#ifdef FAX3_DEBUG
- DEBUG_PRINT("MakeUp", te->runlen);
-#endif
- _PutBits(tif, code, length);
- span -= te->runlen;
- }
- if (span >= 64) {
- const tableentry* te = &tab[63 + (span>>6)];
- assert(te->runlen == 64*(span>>6));
- code = te->code, length = te->length;
-#ifdef FAX3_DEBUG
- DEBUG_PRINT("MakeUp", te->runlen);
-#endif
- _PutBits(tif, code, length);
- span -= te->runlen;
- }
- code = tab[span].code, length = tab[span].length;
-#ifdef FAX3_DEBUG
- DEBUG_PRINT(" Term", tab[span].runlen);
-#endif
- _PutBits(tif, code, length);
-
- sp->data = data;
- sp->bit = bit;
-}
-
-/*
- * Write an EOL code to the output stream. The zero-fill
- * logic for byte-aligning encoded scanlines is handled
- * here. We also handle writing the tag bit for the next
- * scanline when doing 2d encoding.
- */
-static void
-Fax3PutEOL(TIFF* tif)
-{
- Fax3CodecState* sp = EncoderState(tif);
- unsigned int bit = sp->bit;
- int data = sp->data;
- unsigned int code, length, tparm;
-
- if (sp->b.groupoptions & GROUP3OPT_FILLBITS) {
- /*
- * Force bit alignment so EOL will terminate on
- * a byte boundary. That is, force the bit alignment
- * to 16-12 = 4 before putting out the EOL code.
- */
- int align = 8 - 4;
- if (align != sp->bit) {
- if (align > sp->bit)
- align = sp->bit + (8 - align);
- else
- align = sp->bit - align;
- code = 0;
- tparm=align;
- _PutBits(tif, 0, tparm);
- }
- }
- code = EOL, length = 12;
- if (is2DEncoding(sp))
- code = (code<<1) | (sp->tag == G3_1D), length++;
- _PutBits(tif, code, length);
-
- sp->data = data;
- sp->bit = bit;
-}
-
-/*
- * Reset encoding state at the start of a strip.
- */
-static int
-Fax3PreEncode(TIFF* tif, tsample_t s)
-{
- Fax3CodecState* sp = EncoderState(tif);
-
- (void) s;
- assert(sp != NULL);
- sp->bit = 8;
- sp->data = 0;
- sp->tag = G3_1D;
- /*
- * This is necessary for Group 4; otherwise it isn't
- * needed because the first scanline of each strip ends
- * up being copied into the refline.
- */
- if (sp->refline)
- _TIFFmemset(sp->refline, 0x00, sp->b.rowbytes);
- if (is2DEncoding(sp)) {
- float res = tif->tif_dir.td_yresolution;
- /*
- * The CCITT spec says that when doing 2d encoding, you
- * should only do it on K consecutive scanlines, where K
- * depends on the resolution of the image being encoded
- * (2 for <= 200 lpi, 4 for > 200 lpi). Since the directory
- * code initializes td_yresolution to 0, this code will
- * select a K of 2 unless the YResolution tag is set
- * appropriately. (Note also that we fudge a little here
- * and use 150 lpi to avoid problems with units conversion.)
- */
- if (tif->tif_dir.td_resolutionunit == RESUNIT_CENTIMETER)
- res *= 2.54f; /* convert to inches */
- sp->maxk = (res > 150 ? 4 : 2);
- sp->k = sp->maxk-1;
- } else
- sp->k = sp->maxk = 0;
- return (1);
-}
-
-static const unsigned char zeroruns[256] = {
- 8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, /* 0x00 - 0x0f */
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0x10 - 0x1f */
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x20 - 0x2f */
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x30 - 0x3f */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x40 - 0x4f */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x50 - 0x5f */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x60 - 0x6f */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x70 - 0x7f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 - 0x8f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 - 0x9f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 - 0xaf */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 - 0xbf */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 - 0xcf */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 - 0xdf */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 - 0xef */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xf0 - 0xff */
-};
-static const unsigned char oneruns[256] = {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 - 0x0f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 - 0x1f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 - 0x2f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 - 0x3f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40 - 0x4f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 - 0x5f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 - 0x6f */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 - 0x7f */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x80 - 0x8f */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x90 - 0x9f */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xa0 - 0xaf */
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xb0 - 0xbf */
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xc0 - 0xcf */
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xd0 - 0xdf */
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xe0 - 0xef */
- 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8, /* 0xf0 - 0xff */
-};
-
-/*
- * On certain systems it pays to inline
- * the routines that find pixel spans.
- */
-#ifdef VAXC
-static int32 find0span(unsigned char*, int32, int32);
-static int32 find1span(unsigned char*, int32, int32);
-#pragma inline(find0span,find1span)
-#endif
-
-/*
- * Find a span of ones or zeros using the supplied
- * table. The ``base'' of the bit string is supplied
- * along with the start+end bit indices.
- */
-inline static int32
-find0span(unsigned char* bp, int32 bs, int32 be)
-{
- int32 bits = be - bs;
- int32 n, span;
-
- bp += bs>>3;
- /*
- * Check partial byte on lhs.
- */
- if (bits > 0 && (n = (bs & 7))) {
- span = zeroruns[(*bp << n) & 0xff];
- if (span > 8-n) /* table value too generous */
- span = 8-n;
- if (span > bits) /* constrain span to bit range */
- span = bits;
- if (n+span < 8) /* doesn't extend to edge of byte */
- return (span);
- bits -= span;
- bp++;
- } else
- span = 0;
- if (bits >= 2*8*sizeof (long)) {
- long* lp;
- /*
- * Align to longword boundary and check longwords.
- */
- while (!isAligned(bp, long)) {
- if (*bp != 0x00)
- return (span + zeroruns[*bp]);
- span += 8, bits -= 8;
- bp++;
- }
- lp = (long*) bp;
- while (bits >= 8*sizeof (long) && *lp == 0) {
- span += 8*sizeof (long), bits -= 8*sizeof (long);
- lp++;
- }
- bp = (unsigned char*) lp;
- }
- /*
- * Scan full bytes for all 0's.
- */
- while (bits >= 8) {
- if (*bp != 0x00) /* end of run */
- return (span + zeroruns[*bp]);
- span += 8, bits -= 8;
- bp++;
- }
- /*
- * Check partial byte on rhs.
- */
- if (bits > 0) {
- n = zeroruns[*bp];
- span += (n > bits ? bits : n);
- }
- return (span);
-}
-
-inline static int32
-find1span(unsigned char* bp, int32 bs, int32 be)
-{
- int32 bits = be - bs;
- int32 n, span;
-
- bp += bs>>3;
- /*
- * Check partial byte on lhs.
- */
- if (bits > 0 && (n = (bs & 7))) {
- span = oneruns[(*bp << n) & 0xff];
- if (span > 8-n) /* table value too generous */
- span = 8-n;
- if (span > bits) /* constrain span to bit range */
- span = bits;
- if (n+span < 8) /* doesn't extend to edge of byte */
- return (span);
- bits -= span;
- bp++;
- } else
- span = 0;
- if (bits >= 2*8*sizeof (long)) {
- long* lp;
- /*
- * Align to longword boundary and check longwords.
- */
- while (!isAligned(bp, long)) {
- if (*bp != 0xff)
- return (span + oneruns[*bp]);
- span += 8, bits -= 8;
- bp++;
- }
- lp = (long*) bp;
- while (bits >= 8*sizeof (long) && *lp == ~0) {
- span += 8*sizeof (long), bits -= 8*sizeof (long);
- lp++;
- }
- bp = (unsigned char*) lp;
- }
- /*
- * Scan full bytes for all 1's.
- */
- while (bits >= 8) {
- if (*bp != 0xff) /* end of run */
- return (span + oneruns[*bp]);
- span += 8, bits -= 8;
- bp++;
- }
- /*
- * Check partial byte on rhs.
- */
- if (bits > 0) {
- n = oneruns[*bp];
- span += (n > bits ? bits : n);
- }
- return (span);
-}
-
-/*
- * Return the offset of the next bit in the range
- * [bs..be] that is different from the specified
- * color. The end, be, is returned if no such bit
- * exists.
- */
-#define finddiff(_cp, _bs, _be, _color) \
- (_bs + (_color ? find1span(_cp,_bs,_be) : find0span(_cp,_bs,_be)))
-/*
- * Like finddiff, but also check the starting bit
- * against the end in case start > end.
- */
-#define finddiff2(_cp, _bs, _be, _color) \
- (_bs < _be ? finddiff(_cp,_bs,_be,_color) : _be)
-
-/*
- * 1d-encode a row of pixels. The encoding is
- * a sequence of all-white or all-black spans
- * of pixels encoded with Huffman codes.
- */
-static int
-Fax3Encode1DRow(TIFF* tif, unsigned char* bp, uint32 bits)
-{
- Fax3CodecState* sp = EncoderState(tif);
- int32 span;
- uint32 bs = 0;
-
- for (;;) {
- span = find0span(bp, bs, bits); /* white span */
- putspan(tif, span, TIFFFaxWhiteCodes);
- bs += span;
- if (bs >= bits)
- break;
- span = find1span(bp, bs, bits); /* black span */
- putspan(tif, span, TIFFFaxBlackCodes);
- bs += span;
- if (bs >= bits)
- break;
- }
- if (sp->b.mode & (FAXMODE_BYTEALIGN|FAXMODE_WORDALIGN)) {
- if (sp->bit != 8) /* byte-align */
- Fax3FlushBits(tif, sp);
- if ((sp->b.mode&FAXMODE_WORDALIGN) &&
- !isAligned(tif->tif_rawcp, uint16))
- Fax3FlushBits(tif, sp);
- }
- return (1);
-}
-
-static const tableentry horizcode =
- { 3, 0x1 }; /* 001 */
-static const tableentry passcode =
- { 4, 0x1 }; /* 0001 */
-static const tableentry vcodes[7] = {
- { 7, 0x03 }, /* 0000 011 */
- { 6, 0x03 }, /* 0000 11 */
- { 3, 0x03 }, /* 011 */
- { 1, 0x1 }, /* 1 */
- { 3, 0x2 }, /* 010 */
- { 6, 0x02 }, /* 0000 10 */
- { 7, 0x02 } /* 0000 010 */
-};
-
-/*
- * 2d-encode a row of pixels. Consult the CCITT
- * documentation for the algorithm.
- */
-static int
-Fax3Encode2DRow(TIFF* tif, unsigned char* bp, unsigned char* rp, uint32 bits)
-{
-#define PIXEL(buf,ix) ((((buf)[(ix)>>3]) >> (7-((ix)&7))) & 1)
- uint32 a0 = 0;
- uint32 a1 = (PIXEL(bp, 0) != 0 ? 0 : finddiff(bp, 0, bits, 0));
- uint32 b1 = (PIXEL(rp, 0) != 0 ? 0 : finddiff(rp, 0, bits, 0));
- uint32 a2, b2;
-
- for (;;) {
- b2 = finddiff2(rp, b1, bits, PIXEL(rp,b1));
- if (b2 >= a1) {
- int32 d = b1 - a1;
- if (!(-3 <= d && d <= 3)) { /* horizontal mode */
- a2 = finddiff2(bp, a1, bits, PIXEL(bp,a1));
- putcode(tif, &horizcode);
- if (a0+a1 == 0 || PIXEL(bp, a0) == 0) {
- putspan(tif, a1-a0, TIFFFaxWhiteCodes);
- putspan(tif, a2-a1, TIFFFaxBlackCodes);
- } else {
- putspan(tif, a1-a0, TIFFFaxBlackCodes);
- putspan(tif, a2-a1, TIFFFaxWhiteCodes);
- }
- a0 = a2;
- } else { /* vertical mode */
- putcode(tif, &vcodes[d+3]);
- a0 = a1;
- }
- } else { /* pass mode */
- putcode(tif, &passcode);
- a0 = b2;
- }
- if (a0 >= bits)
- break;
- a1 = finddiff(bp, a0, bits, PIXEL(bp,a0));
- b1 = finddiff(rp, a0, bits, !PIXEL(bp,a0));
- b1 = finddiff(rp, b1, bits, PIXEL(bp,a0));
- }
- return (1);
-#undef PIXEL
-}
-
-/*
- * Encode a buffer of pixels.
- */
-static int
-Fax3Encode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
-{
- Fax3CodecState* sp = EncoderState(tif);
-
- (void) s;
- while ((long)cc > 0) {
- if ((sp->b.mode & FAXMODE_NOEOL) == 0)
- Fax3PutEOL(tif);
- if (is2DEncoding(sp)) {
- if (sp->tag == G3_1D) {
- if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels))
- return (0);
- sp->tag = G3_2D;
- } else {
- if (!Fax3Encode2DRow(tif, bp, sp->refline,
- sp->b.rowpixels))
- return (0);
- sp->k--;
- }
- if (sp->k == 0) {
- sp->tag = G3_1D;
- sp->k = sp->maxk-1;
- } else
- _TIFFmemcpy(sp->refline, bp, sp->b.rowbytes);
- } else {
- if (!Fax3Encode1DRow(tif, bp, sp->b.rowpixels))
- return (0);
- }
- bp += sp->b.rowbytes;
- cc -= sp->b.rowbytes;
- }
- return (1);
-}
-
-static int
-Fax3PostEncode(TIFF* tif)
-{
- Fax3CodecState* sp = EncoderState(tif);
-
- if (sp->bit != 8)
- Fax3FlushBits(tif, sp);
- return (1);
-}
-
-static void
-Fax3Close(TIFF* tif)
-{
- if ((Fax3State(tif)->mode & FAXMODE_NORTC) == 0) {
- Fax3CodecState* sp = EncoderState(tif);
- unsigned int code = EOL;
- unsigned int length = 12;
- int i;
-
- if (is2DEncoding(sp))
- code = (code<<1) | (sp->tag == G3_1D), length++;
- for (i = 0; i < 6; i++)
- Fax3PutBits(tif, code, length);
- Fax3FlushBits(tif, sp);
- }
-}
-
-static void
-Fax3Cleanup(TIFF* tif)
-{
- if (tif->tif_data) {
- Fax3CodecState* sp = DecoderState(tif);
-
- if (sp->runs)
- _TIFFfree(sp->runs);
- if (sp->refline)
- _TIFFfree(sp->refline);
-
- if (Fax3State(tif)->subaddress)
- _TIFFfree(Fax3State(tif)->subaddress);
- _TIFFfree(tif->tif_data);
- tif->tif_data = NULL;
- }
-}
-
-#define FIELD_BADFAXLINES (FIELD_CODEC+0)
-#define FIELD_CLEANFAXDATA (FIELD_CODEC+1)
-#define FIELD_BADFAXRUN (FIELD_CODEC+2)
-#define FIELD_RECVPARAMS (FIELD_CODEC+3)
-#define FIELD_SUBADDRESS (FIELD_CODEC+4)
-#define FIELD_RECVTIME (FIELD_CODEC+5)
-#define FIELD_FAXDCS (FIELD_CODEC+6)
-
-#define FIELD_OPTIONS (FIELD_CODEC+7)
-
-static const TIFFFieldInfo faxFieldInfo[] = {
- { TIFFTAG_FAXMODE, 0, 0, TIFF_ANY, FIELD_PSEUDO,
- FALSE, FALSE, "FaxMode" },
- { TIFFTAG_FAXFILLFUNC, 0, 0, TIFF_ANY, FIELD_PSEUDO,
- FALSE, FALSE, "FaxFillFunc" },
- { TIFFTAG_BADFAXLINES, 1, 1, TIFF_LONG, FIELD_BADFAXLINES,
- TRUE, FALSE, "BadFaxLines" },
- { TIFFTAG_BADFAXLINES, 1, 1, TIFF_SHORT, FIELD_BADFAXLINES,
- TRUE, FALSE, "BadFaxLines" },
- { TIFFTAG_CLEANFAXDATA, 1, 1, TIFF_SHORT, FIELD_CLEANFAXDATA,
- TRUE, FALSE, "CleanFaxData" },
- { TIFFTAG_CONSECUTIVEBADFAXLINES,1,1, TIFF_LONG, FIELD_BADFAXRUN,
- TRUE, FALSE, "ConsecutiveBadFaxLines" },
- { TIFFTAG_CONSECUTIVEBADFAXLINES,1,1, TIFF_SHORT, FIELD_BADFAXRUN,
- TRUE, FALSE, "ConsecutiveBadFaxLines" },
- { TIFFTAG_FAXRECVPARAMS, 1, 1, TIFF_LONG, FIELD_RECVPARAMS,
- TRUE, FALSE, "FaxRecvParams" },
- { TIFFTAG_FAXSUBADDRESS, -1,-1, TIFF_ASCII, FIELD_SUBADDRESS,
- TRUE, FALSE, "FaxSubAddress" },
- { TIFFTAG_FAXRECVTIME, 1, 1, TIFF_LONG, FIELD_RECVTIME,
- TRUE, FALSE, "FaxRecvTime" },
- { TIFFTAG_FAXDCS, -1,-1, TIFF_ASCII, FIELD_FAXDCS,
- TRUE, FALSE, "FaxDcs" },
-};
-static const TIFFFieldInfo fax3FieldInfo[] = {
- { TIFFTAG_GROUP3OPTIONS, 1, 1, TIFF_LONG, FIELD_OPTIONS,
- FALSE, FALSE, "Group3Options" },
-};
-static const TIFFFieldInfo fax4FieldInfo[] = {
- { TIFFTAG_GROUP4OPTIONS, 1, 1, TIFF_LONG, FIELD_OPTIONS,
- FALSE, FALSE, "Group4Options" },
-};
-#define N(a) (sizeof (a) / sizeof (a[0]))
-
-static int
-Fax3VSetField(TIFF* tif, ttag_t tag, va_list ap)
-{
- Fax3BaseState* sp = Fax3State(tif);
-
- switch (tag) {
- case TIFFTAG_FAXMODE:
- sp->mode = va_arg(ap, int);
- return (1); /* NB: pseudo tag */
- case TIFFTAG_FAXFILLFUNC:
- DecoderState(tif)->fill = va_arg(ap, TIFFFaxFillFunc);
- return (1); /* NB: pseudo tag */
- case TIFFTAG_GROUP3OPTIONS:
- /* XXX: avoid reading options if compression mismatches. */
- if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX3)
- sp->groupoptions = va_arg(ap, uint32);
- break;
- case TIFFTAG_GROUP4OPTIONS:
- /* XXX: avoid reading options if compression mismatches. */
- if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4)
- sp->groupoptions = va_arg(ap, uint32);
- break;
- case TIFFTAG_BADFAXLINES:
- sp->badfaxlines = va_arg(ap, uint32);
- break;
- case TIFFTAG_CLEANFAXDATA:
- sp->cleanfaxdata = (uint16) va_arg(ap, int);
- break;
- case TIFFTAG_CONSECUTIVEBADFAXLINES:
- sp->badfaxrun = va_arg(ap, uint32);
- break;
- case TIFFTAG_FAXRECVPARAMS:
- sp->recvparams = va_arg(ap, uint32);
- break;
- case TIFFTAG_FAXSUBADDRESS:
- _TIFFsetString(&sp->subaddress, va_arg(ap, char*));
- break;
- case TIFFTAG_FAXRECVTIME:
- sp->recvtime = va_arg(ap, uint32);
- break;
- case TIFFTAG_FAXDCS:
- _TIFFsetString(&sp->faxdcs, va_arg(ap, char*));
- break;
- default:
- return (*sp->vsetparent)(tif, tag, ap);
- }
- TIFFSetFieldBit(tif, _TIFFFieldWithTag(tif, tag)->field_bit);
- tif->tif_flags |= TIFF_DIRTYDIRECT;
- return (1);
-}
-
-static int
-Fax3VGetField(TIFF* tif, ttag_t tag, va_list ap)
-{
- Fax3BaseState* sp = Fax3State(tif);
-
- switch (tag) {
- case TIFFTAG_FAXMODE:
- *va_arg(ap, int*) = sp->mode;
- break;
- case TIFFTAG_FAXFILLFUNC:
- *va_arg(ap, TIFFFaxFillFunc*) = DecoderState(tif)->fill;
- break;
- case TIFFTAG_GROUP3OPTIONS:
- case TIFFTAG_GROUP4OPTIONS:
- *va_arg(ap, uint32*) = sp->groupoptions;
- break;
- case TIFFTAG_BADFAXLINES:
- *va_arg(ap, uint32*) = sp->badfaxlines;
- break;
- case TIFFTAG_CLEANFAXDATA:
- *va_arg(ap, uint16*) = sp->cleanfaxdata;
- break;
- case TIFFTAG_CONSECUTIVEBADFAXLINES:
- *va_arg(ap, uint32*) = sp->badfaxrun;
- break;
- case TIFFTAG_FAXRECVPARAMS:
- *va_arg(ap, uint32*) = sp->recvparams;
- break;
- case TIFFTAG_FAXSUBADDRESS:
- *va_arg(ap, char**) = sp->subaddress;
- break;
- case TIFFTAG_FAXRECVTIME:
- *va_arg(ap, uint32*) = sp->recvtime;
- break;
- case TIFFTAG_FAXDCS:
- *va_arg(ap, char**) = sp->faxdcs;
- break;
- default:
- return (*sp->vgetparent)(tif, tag, ap);
- }
- return (1);
-}
-
-static void
-Fax3PrintDir(TIFF* tif, FILE* fd, long flags)
-{
- Fax3BaseState* sp = Fax3State(tif);
-
- (void) flags;
- if (TIFFFieldSet(tif,FIELD_OPTIONS)) {
- const char* sep = " ";
- if (tif->tif_dir.td_compression == COMPRESSION_CCITTFAX4) {
- fprintf(fd, " Group 4 Options:");
- if (sp->groupoptions & GROUP4OPT_UNCOMPRESSED)
- fprintf(fd, "%suncompressed data", sep);
- } else {
-
- fprintf(fd, " Group 3 Options:");
- if (sp->groupoptions & GROUP3OPT_2DENCODING)
- fprintf(fd, "%s2-d encoding", sep), sep = "+";
- if (sp->groupoptions & GROUP3OPT_FILLBITS)
- fprintf(fd, "%sEOL padding", sep), sep = "+";
- if (sp->groupoptions & GROUP3OPT_UNCOMPRESSED)
- fprintf(fd, "%suncompressed data", sep);
- }
- fprintf(fd, " (%lu = 0x%lx)\n",
- (unsigned long) sp->groupoptions,
- (unsigned long) sp->groupoptions);
- }
- if (TIFFFieldSet(tif,FIELD_CLEANFAXDATA)) {
- fprintf(fd, " Fax Data:");
- switch (sp->cleanfaxdata) {
- case CLEANFAXDATA_CLEAN:
- fprintf(fd, " clean");
- break;
- case CLEANFAXDATA_REGENERATED:
- fprintf(fd, " receiver regenerated");
- break;
- case CLEANFAXDATA_UNCLEAN:
- fprintf(fd, " uncorrected errors");
- break;
- }
- fprintf(fd, " (%u = 0x%x)\n",
- sp->cleanfaxdata, sp->cleanfaxdata);
- }
- if (TIFFFieldSet(tif,FIELD_BADFAXLINES))
- fprintf(fd, " Bad Fax Lines: %lu\n",
- (unsigned long) sp->badfaxlines);
- if (TIFFFieldSet(tif,FIELD_BADFAXRUN))
- fprintf(fd, " Consecutive Bad Fax Lines: %lu\n",
- (unsigned long) sp->badfaxrun);
- if (TIFFFieldSet(tif,FIELD_RECVPARAMS))
- fprintf(fd, " Fax Receive Parameters: %08lx\n",
- (unsigned long) sp->recvparams);
- if (TIFFFieldSet(tif,FIELD_SUBADDRESS))
- fprintf(fd, " Fax SubAddress: %s\n", sp->subaddress);
- if (TIFFFieldSet(tif,FIELD_RECVTIME))
- fprintf(fd, " Fax Receive Time: %lu secs\n",
- (unsigned long) sp->recvtime);
- if (TIFFFieldSet(tif,FIELD_FAXDCS))
- fprintf(fd, " Fax DCS: %s\n", sp->faxdcs);
-}
-
-static int
-InitCCITTFax3(TIFF* tif)
-{
- Fax3BaseState* sp;
-
- /*
- * Allocate state block so tag methods have storage to record values.
- */
- tif->tif_data = (tidata_t)
- _TIFFmalloc(sizeof (Fax3CodecState));
-
- if (tif->tif_data == NULL) {
- TIFFError("TIFFInitCCITTFax3",
- "%s: No space for state block", tif->tif_name);
- return (0);
- }
-
- sp = Fax3State(tif);
- sp->rw_mode = tif->tif_mode;
-
- /*
- * Merge codec-specific tag information and
- * override parent get/set field methods.
- */
- _TIFFMergeFieldInfo(tif, faxFieldInfo, N(faxFieldInfo));
- sp->vgetparent = tif->tif_tagmethods.vgetfield;
- tif->tif_tagmethods.vgetfield = Fax3VGetField; /* hook for codec tags */
- sp->vsetparent = tif->tif_tagmethods.vsetfield;
- tif->tif_tagmethods.vsetfield = Fax3VSetField; /* hook for codec tags */
- tif->tif_tagmethods.printdir = Fax3PrintDir; /* hook for codec tags */
- sp->groupoptions = 0;
- sp->recvparams = 0;
- sp->subaddress = NULL;
- sp->faxdcs = NULL;
-
- if (sp->rw_mode == O_RDONLY) /* FIXME: improve for in place update */
- tif->tif_flags |= TIFF_NOBITREV; /* decoder does bit reversal */
- DecoderState(tif)->runs = NULL;
- TIFFSetField(tif, TIFFTAG_FAXFILLFUNC, _TIFFFax3fillruns);
- EncoderState(tif)->refline = NULL;
-
- /*
- * Install codec methods.
- */
- tif->tif_setupdecode = Fax3SetupState;
- tif->tif_predecode = Fax3PreDecode;
- tif->tif_decoderow = Fax3Decode1D;
- tif->tif_decodestrip = Fax3Decode1D;
- tif->tif_decodetile = Fax3Decode1D;
- tif->tif_setupencode = Fax3SetupState;
- tif->tif_preencode = Fax3PreEncode;
- tif->tif_postencode = Fax3PostEncode;
- tif->tif_encoderow = Fax3Encode;
- tif->tif_encodestrip = Fax3Encode;
- tif->tif_encodetile = Fax3Encode;
- tif->tif_close = Fax3Close;
- tif->tif_cleanup = Fax3Cleanup;
-
- return (1);
-}
-
-int
-TIFFInitCCITTFax3(TIFF* tif, int scheme)
-{
- if (InitCCITTFax3(tif)) {
- _TIFFMergeFieldInfo(tif, fax3FieldInfo, N(fax3FieldInfo));
-
- /*
- * The default format is Class/F-style w/o RTC.
- */
- return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_CLASSF);
- } else
- return (0);
-}
-
-/*
- * CCITT Group 4 (T.6) Facsimile-compatible
- * Compression Scheme Support.
- */
-
-#define SWAP(t,a,b) { t x; x = (a); (a) = (b); (b) = x; }
-/*
- * Decode the requested amount of G4-encoded data.
- */
-static int
-Fax4Decode(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
- DECLARE_STATE_2D(tif, sp, "Fax4Decode");
-
- (void) s;
- CACHE_STATE(tif, sp);
- while ((long)occ > 0) {
- a0 = 0;
- RunLength = 0;
- pa = thisrun = sp->curruns;
- pb = sp->refruns;
- b1 = *pb++;
-#ifdef FAX3_DEBUG
- printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail);
- printf("-------------------- %d\n", tif->tif_row);
- fflush(stdout);
-#endif
- EXPAND2D(EOFG4);
- if (EOLcnt)
- goto EOFG4;
- (*sp->fill)(buf, thisrun, pa, lastx);
- SETVAL(0); /* imaginary change for reference */
- SWAP(uint32*, sp->curruns, sp->refruns);
- buf += sp->b.rowbytes;
- occ -= sp->b.rowbytes;
- continue;
- EOFG4:
- NeedBits16( 13, BADG4 );
- BADG4:
-#ifdef FAX3_DEBUG
- if( GetBits(13) != 0x1001 )
- fputs( "Bad RTC\n", stderr );
-#endif
- ClrBits( 13 );
- (*sp->fill)(buf, thisrun, pa, lastx);
- UNCACHE_STATE(tif, sp);
- return (-1);
- }
- UNCACHE_STATE(tif, sp);
- return (1);
-}
-#undef SWAP
-
-/*
- * Encode the requested amount of data.
- */
-static int
-Fax4Encode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
-{
- Fax3CodecState *sp = EncoderState(tif);
-
- (void) s;
- while ((long)cc > 0) {
- if (!Fax3Encode2DRow(tif, bp, sp->refline, sp->b.rowpixels))
- return (0);
- _TIFFmemcpy(sp->refline, bp, sp->b.rowbytes);
- bp += sp->b.rowbytes;
- cc -= sp->b.rowbytes;
- }
- return (1);
-}
-
-static int
-Fax4PostEncode(TIFF* tif)
-{
- Fax3CodecState *sp = EncoderState(tif);
-
- /* terminate strip w/ EOFB */
- Fax3PutBits(tif, EOL, 12);
- Fax3PutBits(tif, EOL, 12);
- if (sp->bit != 8)
- Fax3FlushBits(tif, sp);
- return (1);
-}
-
-int
-TIFFInitCCITTFax4(TIFF* tif, int scheme)
-{
- if (InitCCITTFax3(tif)) { /* reuse G3 support */
- _TIFFMergeFieldInfo(tif, fax4FieldInfo, N(fax4FieldInfo));
-
- tif->tif_decoderow = Fax4Decode;
- tif->tif_decodestrip = Fax4Decode;
- tif->tif_decodetile = Fax4Decode;
- tif->tif_encoderow = Fax4Encode;
- tif->tif_encodestrip = Fax4Encode;
- tif->tif_encodetile = Fax4Encode;
- tif->tif_postencode = Fax4PostEncode;
- /*
- * Suppress RTC at the end of each strip.
- */
- return TIFFSetField(tif, TIFFTAG_FAXMODE, FAXMODE_NORTC);
- } else
- return (0);
-}
-
-/*
- * CCITT Group 3 1-D Modified Huffman RLE Compression Support.
- * (Compression algorithms 2 and 32771)
- */
-
-/*
- * Decode the requested amount of RLE-encoded data.
- */
-static int
-Fax3DecodeRLE(TIFF* tif, tidata_t buf, tsize_t occ, tsample_t s)
-{
- DECLARE_STATE(tif, sp, "Fax3DecodeRLE");
- int mode = sp->b.mode;
-
- (void) s;
- CACHE_STATE(tif, sp);
- thisrun = sp->curruns;
- while ((long)occ > 0) {
- a0 = 0;
- RunLength = 0;
- pa = thisrun;
-#ifdef FAX3_DEBUG
- printf("\nBitAcc=%08X, BitsAvail = %d\n", BitAcc, BitsAvail);
- printf("-------------------- %d\n", tif->tif_row);
- fflush(stdout);
-#endif
- EXPAND1D(EOFRLE);
- (*sp->fill)(buf, thisrun, pa, lastx);
- /*
- * Cleanup at the end of the row.
- */
- if (mode & FAXMODE_BYTEALIGN) {
- int n = BitsAvail - (BitsAvail &~ 7);
- ClrBits(n);
- } else if (mode & FAXMODE_WORDALIGN) {
- int n = BitsAvail - (BitsAvail &~ 15);
- ClrBits(n);
- if (BitsAvail == 0 && !isAligned(cp, uint16))
- cp++;
- }
- buf += sp->b.rowbytes;
- occ -= sp->b.rowbytes;
- continue;
- EOFRLE: /* premature EOF */
- (*sp->fill)(buf, thisrun, pa, lastx);
- UNCACHE_STATE(tif, sp);
- return (-1);
- }
- UNCACHE_STATE(tif, sp);
- return (1);
-}
-
-int
-TIFFInitCCITTRLE(TIFF* tif, int scheme)
-{
- if (InitCCITTFax3(tif)) { /* reuse G3 support */
- tif->tif_decoderow = Fax3DecodeRLE;
- tif->tif_decodestrip = Fax3DecodeRLE;
- tif->tif_decodetile = Fax3DecodeRLE;
- /*
- * Suppress RTC+EOLs when encoding and byte-align data.
- */
- return TIFFSetField(tif, TIFFTAG_FAXMODE,
- FAXMODE_NORTC|FAXMODE_NOEOL|FAXMODE_BYTEALIGN);
- } else
- return (0);
-}
-
-int
-TIFFInitCCITTRLEW(TIFF* tif, int scheme)
-{
- if (InitCCITTFax3(tif)) { /* reuse G3 support */
- tif->tif_decoderow = Fax3DecodeRLE;
- tif->tif_decodestrip = Fax3DecodeRLE;
- tif->tif_decodetile = Fax3DecodeRLE;
- /*
- * Suppress RTC+EOLs when encoding and word-align data.
- */
- return TIFFSetField(tif, TIFFTAG_FAXMODE,
- FAXMODE_NORTC|FAXMODE_NOEOL|FAXMODE_WORDALIGN);
- } else
- return (0);
-}
-#endif /* CCITT_SUPPORT */
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
projects / opencv / blobdiff