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Diffstat (limited to 'src/libtiff/tif_predict.c')
-rw-r--r--src/libtiff/tif_predict.c219
1 files changed, 58 insertions, 161 deletions
diff --git a/src/libtiff/tif_predict.c b/src/libtiff/tif_predict.c
index 3761d24..519b4aa 100644
--- a/src/libtiff/tif_predict.c
+++ b/src/libtiff/tif_predict.c
@@ -1,4 +1,4 @@
-/* $Id: tif_predict.c,v 1.3 2009/12/11 15:17:41 scuri Exp $ */
+/* $Id: tif_predict.c,v 1.4 2010/01/26 15:56:36 scuri Exp $ */
/*
* Copyright (c) 1988-1997 Sam Leffler
@@ -36,12 +36,9 @@
static void horAcc8(TIFF*, tidata_t, tsize_t);
static void horAcc16(TIFF*, tidata_t, tsize_t);
-static void horAcc32(TIFF*, tidata_t, tsize_t);
static void swabHorAcc16(TIFF*, tidata_t, tsize_t);
-static void swabHorAcc32(TIFF*, tidata_t, tsize_t);
static void horDiff8(TIFF*, tidata_t, tsize_t);
static void horDiff16(TIFF*, tidata_t, tsize_t);
-static void horDiff32(TIFF*, tidata_t, tsize_t);
static void fpAcc(TIFF*, tidata_t, tsize_t);
static void fpDiff(TIFF*, tidata_t, tsize_t);
static int PredictorDecodeRow(TIFF*, tidata_t, tsize_t, tsample_t);
@@ -63,8 +60,7 @@ PredictorSetup(TIFF* tif)
return 1;
case PREDICTOR_HORIZONTAL:
if (td->td_bitspersample != 8
- && td->td_bitspersample != 16
- && td->td_bitspersample != 32) {
+ && td->td_bitspersample != 16) {
TIFFErrorExt(tif->tif_clientdata, module,
"Horizontal differencing \"Predictor\" not supported with %d-bit samples",
td->td_bitspersample);
@@ -109,23 +105,19 @@ PredictorSetupDecode(TIFF* tif)
if (sp->predictor == 2) {
switch (td->td_bitspersample) {
- case 8: sp->decodepfunc = horAcc8; break;
- case 16: sp->decodepfunc = horAcc16; break;
- case 32: sp->decodepfunc = horAcc32; break;
+ case 8: sp->pfunc = horAcc8; break;
+ case 16: sp->pfunc = horAcc16; break;
}
/*
* Override default decoding method with one that does the
* predictor stuff.
*/
- if( tif->tif_decoderow != PredictorDecodeRow )
- {
- sp->decoderow = tif->tif_decoderow;
- tif->tif_decoderow = PredictorDecodeRow;
- sp->decodestrip = tif->tif_decodestrip;
- tif->tif_decodestrip = PredictorDecodeTile;
- sp->decodetile = tif->tif_decodetile;
- tif->tif_decodetile = PredictorDecodeTile;
- }
+ sp->coderow = tif->tif_decoderow;
+ tif->tif_decoderow = PredictorDecodeRow;
+ sp->codestrip = tif->tif_decodestrip;
+ tif->tif_decodestrip = PredictorDecodeTile;
+ sp->codetile = tif->tif_decodetile;
+ tif->tif_decodetile = PredictorDecodeTile;
/*
* If the data is horizontally differenced 16-bit data that
* requires byte-swapping, then it must be byte swapped before
@@ -134,31 +126,25 @@ PredictorSetupDecode(TIFF* tif)
* the library setup when the directory was read.
*/
if (tif->tif_flags & TIFF_SWAB) {
- if (sp->decodepfunc == horAcc16) {
- sp->decodepfunc = swabHorAcc16;
+ if (sp->pfunc == horAcc16) {
+ sp->pfunc = swabHorAcc16;
tif->tif_postdecode = _TIFFNoPostDecode;
- } else if (sp->decodepfunc == horAcc32) {
- sp->decodepfunc = swabHorAcc32;
- tif->tif_postdecode = _TIFFNoPostDecode;
- }
+ } /* else handle 32-bit case... */
}
}
else if (sp->predictor == 3) {
- sp->decodepfunc = fpAcc;
+ sp->pfunc = fpAcc;
/*
* Override default decoding method with one that does the
* predictor stuff.
*/
- if( tif->tif_decoderow != PredictorDecodeRow )
- {
- sp->decoderow = tif->tif_decoderow;
- tif->tif_decoderow = PredictorDecodeRow;
- sp->decodestrip = tif->tif_decodestrip;
- tif->tif_decodestrip = PredictorDecodeTile;
- sp->decodetile = tif->tif_decodetile;
- tif->tif_decodetile = PredictorDecodeTile;
- }
+ sp->coderow = tif->tif_decoderow;
+ tif->tif_decoderow = PredictorDecodeRow;
+ sp->codestrip = tif->tif_decodestrip;
+ tif->tif_decodestrip = PredictorDecodeTile;
+ sp->codetile = tif->tif_decodetile;
+ tif->tif_decodetile = PredictorDecodeTile;
/*
* The data should not be swapped outside of the floating
* point predictor, the accumulation routine should return
@@ -187,40 +173,33 @@ PredictorSetupEncode(TIFF* tif)
if (sp->predictor == 2) {
switch (td->td_bitspersample) {
- case 8: sp->encodepfunc = horDiff8; break;
- case 16: sp->encodepfunc = horDiff16; break;
- case 32: sp->encodepfunc = horDiff32; break;
+ case 8: sp->pfunc = horDiff8; break;
+ case 16: sp->pfunc = horDiff16; break;
}
/*
* Override default encoding method with one that does the
* predictor stuff.
*/
- if( tif->tif_encoderow != PredictorEncodeRow )
- {
- sp->encoderow = tif->tif_encoderow;
- tif->tif_encoderow = PredictorEncodeRow;
- sp->encodestrip = tif->tif_encodestrip;
- tif->tif_encodestrip = PredictorEncodeTile;
- sp->encodetile = tif->tif_encodetile;
- tif->tif_encodetile = PredictorEncodeTile;
- }
+ sp->coderow = tif->tif_encoderow;
+ tif->tif_encoderow = PredictorEncodeRow;
+ sp->codestrip = tif->tif_encodestrip;
+ tif->tif_encodestrip = PredictorEncodeTile;
+ sp->codetile = tif->tif_encodetile;
+ tif->tif_encodetile = PredictorEncodeTile;
}
else if (sp->predictor == 3) {
- sp->encodepfunc = fpDiff;
+ sp->pfunc = fpDiff;
/*
* Override default encoding method with one that does the
* predictor stuff.
*/
- if( tif->tif_encoderow != PredictorEncodeRow )
- {
- sp->encoderow = tif->tif_encoderow;
- tif->tif_encoderow = PredictorEncodeRow;
- sp->encodestrip = tif->tif_encodestrip;
- tif->tif_encodestrip = PredictorEncodeTile;
- sp->encodetile = tif->tif_encodetile;
- tif->tif_encodetile = PredictorEncodeTile;
- }
+ sp->coderow = tif->tif_encoderow;
+ tif->tif_encoderow = PredictorEncodeRow;
+ sp->codestrip = tif->tif_encodestrip;
+ tif->tif_encodestrip = PredictorEncodeTile;
+ sp->codetile = tif->tif_encodetile;
+ tif->tif_encodetile = PredictorEncodeTile;
}
return 1;
@@ -312,39 +291,6 @@ horAcc16(TIFF* tif, tidata_t cp0, tsize_t cc)
}
}
-static void
-swabHorAcc32(TIFF* tif, tidata_t cp0, tsize_t cc)
-{
- tsize_t stride = PredictorState(tif)->stride;
- uint32* wp = (uint32*) cp0;
- tsize_t wc = cc / 4;
-
- if (wc > stride) {
- TIFFSwabArrayOfLong(wp, wc);
- wc -= stride;
- do {
- REPEAT4(stride, wp[stride] += wp[0]; wp++)
- wc -= stride;
- } while ((int32) wc > 0);
- }
-}
-
-static void
-horAcc32(TIFF* tif, tidata_t cp0, tsize_t cc)
-{
- tsize_t stride = PredictorState(tif)->stride;
- uint32* wp = (uint32*) cp0;
- tsize_t wc = cc / 4;
-
- if (wc > stride) {
- wc -= stride;
- do {
- REPEAT4(stride, wp[stride] += wp[0]; wp++)
- wc -= stride;
- } while ((int32) wc > 0);
- }
-}
-
/*
* Floating point predictor accumulation routine.
*/
@@ -391,11 +337,11 @@ PredictorDecodeRow(TIFF* tif, tidata_t op0, tsize_t occ0, tsample_t s)
TIFFPredictorState *sp = PredictorState(tif);
assert(sp != NULL);
- assert(sp->decoderow != NULL);
- assert(sp->decodepfunc != NULL);
+ assert(sp->coderow != NULL);
+ assert(sp->pfunc != NULL);
- if ((*sp->decoderow)(tif, op0, occ0, s)) {
- (*sp->decodepfunc)(tif, op0, occ0);
+ if ((*sp->coderow)(tif, op0, occ0, s)) {
+ (*sp->pfunc)(tif, op0, occ0);
return 1;
} else
return 0;
@@ -414,14 +360,14 @@ PredictorDecodeTile(TIFF* tif, tidata_t op0, tsize_t occ0, tsample_t s)
TIFFPredictorState *sp = PredictorState(tif);
assert(sp != NULL);
- assert(sp->decodetile != NULL);
+ assert(sp->codetile != NULL);
- if ((*sp->decodetile)(tif, op0, occ0, s)) {
+ if ((*sp->codetile)(tif, op0, occ0, s)) {
tsize_t rowsize = sp->rowsize;
assert(rowsize > 0);
- assert(sp->decodepfunc != NULL);
+ assert(sp->pfunc != NULL);
while ((long)occ0 > 0) {
- (*sp->decodepfunc)(tif, op0, (tsize_t) rowsize);
+ (*sp->pfunc)(tif, op0, (tsize_t) rowsize);
occ0 -= rowsize;
op0 += rowsize;
}
@@ -493,24 +439,6 @@ horDiff16(TIFF* tif, tidata_t cp0, tsize_t cc)
}
}
-static void
-horDiff32(TIFF* tif, tidata_t cp0, tsize_t cc)
-{
- TIFFPredictorState* sp = PredictorState(tif);
- tsize_t stride = sp->stride;
- int32 *wp = (int32*) cp0;
- tsize_t wc = cc/4;
-
- if (wc > stride) {
- wc -= stride;
- wp += wc - 1;
- do {
- REPEAT4(stride, wp[stride] -= wp[0]; wp--)
- wc -= stride;
- } while ((int32) wc > 0);
- }
-}
-
/*
* Floating point predictor differencing routine.
*/
@@ -553,56 +481,33 @@ PredictorEncodeRow(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
TIFFPredictorState *sp = PredictorState(tif);
assert(sp != NULL);
- assert(sp->encodepfunc != NULL);
- assert(sp->encoderow != NULL);
+ assert(sp->pfunc != NULL);
+ assert(sp->coderow != NULL);
/* XXX horizontal differencing alters user's data XXX */
- (*sp->encodepfunc)(tif, bp, cc);
- return (*sp->encoderow)(tif, bp, cc, s);
+ (*sp->pfunc)(tif, bp, cc);
+ return (*sp->coderow)(tif, bp, cc, s);
}
static int
PredictorEncodeTile(TIFF* tif, tidata_t bp0, tsize_t cc0, tsample_t s)
{
- static const char module[] = "PredictorEncodeTile";
TIFFPredictorState *sp = PredictorState(tif);
- uint8 *working_copy;
tsize_t cc = cc0, rowsize;
- unsigned char* bp;
- int result_code;
+ unsigned char* bp = bp0;
assert(sp != NULL);
- assert(sp->encodepfunc != NULL);
- assert(sp->encodetile != NULL);
-
- /*
- * Do predictor manipulation in a working buffer to avoid altering
- * the callers buffer. http://trac.osgeo.org/gdal/ticket/1965
- */
- working_copy = (uint8*) _TIFFmalloc(cc0);
- if( working_copy == NULL )
- {
- TIFFErrorExt(tif->tif_clientdata, module,
- "Out of memory allocating %d byte temp buffer.",
- cc0 );
- return 0;
- }
- memcpy( working_copy, bp0, cc0 );
- bp = working_copy;
+ assert(sp->pfunc != NULL);
+ assert(sp->codetile != NULL);
rowsize = sp->rowsize;
assert(rowsize > 0);
- assert((cc0%rowsize)==0);
- while (cc > 0) {
- (*sp->encodepfunc)(tif, bp, rowsize);
+ while ((long)cc > 0) {
+ (*sp->pfunc)(tif, bp, (tsize_t) rowsize);
cc -= rowsize;
bp += rowsize;
}
- result_code = (*sp->encodetile)(tif, working_copy, cc0, s);
-
- _TIFFfree( working_copy );
-
- return result_code;
+ return (*sp->codetile)(tif, bp0, cc0, s);
}
#define FIELD_PREDICTOR (FIELD_CODEC+0) /* XXX */
@@ -611,6 +516,7 @@ static const TIFFFieldInfo predictFieldInfo[] = {
{ TIFFTAG_PREDICTOR, 1, 1, TIFF_SHORT, FIELD_PREDICTOR,
FALSE, FALSE, "Predictor" },
};
+#define N(a) (sizeof (a) / sizeof (a[0]))
static int
PredictorVSetField(TIFF* tif, ttag_t tag, va_list ap)
@@ -677,18 +583,10 @@ TIFFPredictorInit(TIFF* tif)
assert(sp != 0);
/*
- * Merge codec-specific tag information.
- */
- if (!_TIFFMergeFieldInfo(tif, predictFieldInfo,
- TIFFArrayCount(predictFieldInfo))) {
- TIFFErrorExt(tif->tif_clientdata, "TIFFPredictorInit",
- "Merging Predictor codec-specific tags failed");
- return 0;
- }
-
- /*
- * Override parent get/set field methods.
+ * Merge codec-specific tag information and
+ * override parent get/set field methods.
*/
+ _TIFFMergeFieldInfo(tif, predictFieldInfo, N(predictFieldInfo));
sp->vgetparent = tif->tif_tagmethods.vgetfield;
tif->tif_tagmethods.vgetfield =
PredictorVGetField;/* hook for predictor tag */
@@ -705,8 +603,7 @@ TIFFPredictorInit(TIFF* tif)
tif->tif_setupencode = PredictorSetupEncode;
sp->predictor = 1; /* default value */
- sp->encodepfunc = NULL; /* no predictor routine */
- sp->decodepfunc = NULL; /* no predictor routine */
+ sp->pfunc = NULL; /* no predictor routine */
return 1;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 00:22:11 +0000