| /* | |
| * Copyright (c) 1988-1997 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. | |
| */ | |
| /* | |
| * TIFF Library. | |
| * | |
| * Predictor Tag Support (used by multiple codecs). | |
| */ | |
| #include "tif_predict.h" | |
| #include "tiffiop.h" | |
| #if defined(__x86_64__) || (defined(_M_X64) && !defined(_M_ARM64EC)) | |
| #include <emmintrin.h> | |
| #endif | |
| #define PredictorState(tif) ((TIFFPredictorState *)(tif)->tif_data) | |
| static int horAcc8(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int horAcc16(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int horAcc32(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int horAcc64(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int swabHorAcc16(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int swabHorAcc32(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int swabHorAcc64(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int horDiff8(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int horDiff16(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int horDiff32(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int horDiff64(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int swabHorDiff16(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int swabHorDiff32(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int swabHorDiff64(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int fpAcc(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int fpDiff(TIFF *tif, uint8_t *cp0, tmsize_t cc); | |
| static int PredictorDecodeRow(TIFF *tif, uint8_t *op0, tmsize_t occ0, | |
| uint16_t s); | |
| static int PredictorDecodeTile(TIFF *tif, uint8_t *op0, tmsize_t occ0, | |
| uint16_t s); | |
| static int PredictorEncodeRow(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s); | |
| static int PredictorEncodeTile(TIFF *tif, uint8_t *bp0, tmsize_t cc0, | |
| uint16_t s); | |
| static int PredictorSetup(TIFF *tif) | |
| { | |
| static const char module[] = "PredictorSetup"; | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| TIFFDirectory *td = &tif->tif_dir; | |
| switch (sp->predictor) /* no differencing */ | |
| { | |
| case PREDICTOR_NONE: | |
| return 1; | |
| case PREDICTOR_HORIZONTAL: | |
| if (td->td_bitspersample != 8 && td->td_bitspersample != 16 && | |
| td->td_bitspersample != 32 && td->td_bitspersample != 64) | |
| { | |
| TIFFErrorExtR(tif, module, | |
| "Horizontal differencing \"Predictor\" not " | |
| "supported with %" PRIu16 "-bit samples", | |
| td->td_bitspersample); | |
| return 0; | |
| } | |
| break; | |
| case PREDICTOR_FLOATINGPOINT: | |
| if (td->td_sampleformat != SAMPLEFORMAT_IEEEFP) | |
| { | |
| TIFFErrorExtR( | |
| tif, module, | |
| "Floating point \"Predictor\" not supported with %" PRIu16 | |
| " data format", | |
| td->td_sampleformat); | |
| return 0; | |
| } | |
| if (td->td_bitspersample != 16 && td->td_bitspersample != 24 && | |
| td->td_bitspersample != 32 && td->td_bitspersample != 64) | |
| { /* Should 64 be allowed? */ | |
| TIFFErrorExtR( | |
| tif, module, | |
| "Floating point \"Predictor\" not supported with %" PRIu16 | |
| "-bit samples", | |
| td->td_bitspersample); | |
| return 0; | |
| } | |
| break; | |
| default: | |
| TIFFErrorExtR(tif, module, "\"Predictor\" value %d not supported", | |
| sp->predictor); | |
| return 0; | |
| } | |
| sp->stride = | |
| (td->td_planarconfig == PLANARCONFIG_CONTIG ? td->td_samplesperpixel | |
| : 1); | |
| /* | |
| * Calculate the scanline/tile-width size in bytes. | |
| */ | |
| if (isTiled(tif)) | |
| sp->rowsize = TIFFTileRowSize(tif); | |
| else | |
| sp->rowsize = TIFFScanlineSize(tif); | |
| if (sp->rowsize == 0) | |
| return 0; | |
| return 1; | |
| } | |
| static int PredictorSetupDecode(TIFF *tif) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| TIFFDirectory *td = &tif->tif_dir; | |
| /* Note: when PredictorSetup() fails, the effets of setupdecode() */ | |
| /* will not be "canceled" so setupdecode() might be robust to */ | |
| /* be called several times. */ | |
| if (!(*sp->setupdecode)(tif) || !PredictorSetup(tif)) | |
| return 0; | |
| 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 64: | |
| sp->decodepfunc = horAcc64; | |
| break; | |
| default: | |
| 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; | |
| } | |
| /* | |
| * If the data is horizontally differenced 16-bit data that | |
| * requires byte-swapping, then it must be byte swapped before | |
| * the accumulation step. We do this with a special-purpose | |
| * routine and override the normal post decoding logic that | |
| * the library setup when the directory was read. | |
| */ | |
| if (tif->tif_flags & TIFF_SWAB) | |
| { | |
| if (sp->decodepfunc == horAcc16) | |
| { | |
| sp->decodepfunc = swabHorAcc16; | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| else if (sp->decodepfunc == horAcc32) | |
| { | |
| sp->decodepfunc = swabHorAcc32; | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| else if (sp->decodepfunc == horAcc64) | |
| { | |
| sp->decodepfunc = swabHorAcc64; | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| } | |
| } | |
| else if (sp->predictor == 3) | |
| { | |
| sp->decodepfunc = 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; | |
| } | |
| /* | |
| * The data should not be swapped outside of the floating | |
| * point predictor, the accumulation routine should return | |
| * bytes in the native order. | |
| */ | |
| if (tif->tif_flags & TIFF_SWAB) | |
| { | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| } | |
| return 1; | |
| } | |
| static int PredictorSetupEncode(TIFF *tif) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| TIFFDirectory *td = &tif->tif_dir; | |
| if (!(*sp->setupencode)(tif) || !PredictorSetup(tif)) | |
| return 0; | |
| 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 64: | |
| sp->encodepfunc = horDiff64; | |
| break; | |
| default: | |
| 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; | |
| } | |
| /* | |
| * If the data is horizontally differenced 16-bit data that | |
| * requires byte-swapping, then it must be byte swapped after | |
| * the differentiation step. We do this with a special-purpose | |
| * routine and override the normal post decoding logic that | |
| * the library setup when the directory was read. | |
| */ | |
| if (tif->tif_flags & TIFF_SWAB) | |
| { | |
| if (sp->encodepfunc == horDiff16) | |
| { | |
| sp->encodepfunc = swabHorDiff16; | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| else if (sp->encodepfunc == horDiff32) | |
| { | |
| sp->encodepfunc = swabHorDiff32; | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| else if (sp->encodepfunc == horDiff64) | |
| { | |
| sp->encodepfunc = swabHorDiff64; | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| } | |
| } | |
| else if (sp->predictor == 3) | |
| { | |
| sp->encodepfunc = 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; | |
| } | |
| /* | |
| * The data should not be swapped outside of the floating | |
| * point predictor, the differentiation routine should return | |
| * bytes in the native order. | |
| */ | |
| if (tif->tif_flags & TIFF_SWAB) | |
| { | |
| tif->tif_postdecode = _TIFFNoPostDecode; | |
| } | |
| } | |
| return 1; | |
| } | |
| #define REPEAT4(n, op) \ | |
| switch (n) \ | |
| { \ | |
| default: \ | |
| { \ | |
| tmsize_t i; \ | |
| for (i = n - 4; i > 0; i--) \ | |
| { \ | |
| op; \ | |
| } \ | |
| } /*-fallthrough*/ \ | |
| case 4: \ | |
| op; /*-fallthrough*/ \ | |
| case 3: \ | |
| op; /*-fallthrough*/ \ | |
| case 2: \ | |
| op; /*-fallthrough*/ \ | |
| case 1: \ | |
| op; /*-fallthrough*/ \ | |
| case 0:; \ | |
| } | |
| /* Remarks related to C standard compliance in all below functions : */ | |
| /* - to avoid any undefined behavior, we only operate on unsigned types */ | |
| /* since the behavior of "overflows" is defined (wrap over) */ | |
| /* - when storing into the byte stream, we explicitly mask with 0xff so */ | |
| /* as to make icc -check=conversions happy (not necessary by the standard) */ | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horAcc8(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| tmsize_t stride = PredictorState(tif)->stride; | |
| uint8_t *cp = cp0; | |
| if ((cc % stride) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horAcc8", "%s", "(cc%stride)!=0"); | |
| return 0; | |
| } | |
| if (cc > stride) | |
| { | |
| /* | |
| * Pipeline the most common cases. | |
| */ | |
| if (stride == 1) | |
| { | |
| uint32_t acc = cp[0]; | |
| tmsize_t i = stride; | |
| for (; i < cc - 3; i += 4) | |
| { | |
| cp[i + 0] = (uint8_t)((acc += cp[i + 0]) & 0xff); | |
| cp[i + 1] = (uint8_t)((acc += cp[i + 1]) & 0xff); | |
| cp[i + 2] = (uint8_t)((acc += cp[i + 2]) & 0xff); | |
| cp[i + 3] = (uint8_t)((acc += cp[i + 3]) & 0xff); | |
| } | |
| for (; i < cc; i++) | |
| { | |
| cp[i + 0] = (uint8_t)((acc += cp[i + 0]) & 0xff); | |
| } | |
| } | |
| else if (stride == 3) | |
| { | |
| uint32_t cr = cp[0]; | |
| uint32_t cg = cp[1]; | |
| uint32_t cb = cp[2]; | |
| tmsize_t i = stride; | |
| for (; i < cc; i += stride) | |
| { | |
| cp[i + 0] = (uint8_t)((cr += cp[i + 0]) & 0xff); | |
| cp[i + 1] = (uint8_t)((cg += cp[i + 1]) & 0xff); | |
| cp[i + 2] = (uint8_t)((cb += cp[i + 2]) & 0xff); | |
| } | |
| } | |
| else if (stride == 4) | |
| { | |
| uint32_t cr = cp[0]; | |
| uint32_t cg = cp[1]; | |
| uint32_t cb = cp[2]; | |
| uint32_t ca = cp[3]; | |
| tmsize_t i = stride; | |
| for (; i < cc; i += stride) | |
| { | |
| cp[i + 0] = (uint8_t)((cr += cp[i + 0]) & 0xff); | |
| cp[i + 1] = (uint8_t)((cg += cp[i + 1]) & 0xff); | |
| cp[i + 2] = (uint8_t)((cb += cp[i + 2]) & 0xff); | |
| cp[i + 3] = (uint8_t)((ca += cp[i + 3]) & 0xff); | |
| } | |
| } | |
| else | |
| { | |
| cc -= stride; | |
| do | |
| { | |
| REPEAT4(stride, | |
| cp[stride] = (uint8_t)((cp[stride] + *cp) & 0xff); | |
| cp++) | |
| cc -= stride; | |
| } while (cc > 0); | |
| } | |
| } | |
| return 1; | |
| } | |
| static int swabHorAcc16(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| uint16_t *wp = (uint16_t *)cp0; | |
| tmsize_t wc = cc / 2; | |
| TIFFSwabArrayOfShort(wp, wc); | |
| return horAcc16(tif, cp0, cc); | |
| } | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horAcc16(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| tmsize_t stride = PredictorState(tif)->stride; | |
| uint16_t *wp = (uint16_t *)cp0; | |
| tmsize_t wc = cc / 2; | |
| if ((cc % (2 * stride)) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horAcc16", "%s", "cc%(2*stride))!=0"); | |
| return 0; | |
| } | |
| if (wc > stride) | |
| { | |
| wc -= stride; | |
| do | |
| { | |
| REPEAT4(stride, wp[stride] = (uint16_t)(((unsigned int)wp[stride] + | |
| (unsigned int)wp[0]) & | |
| 0xffff); | |
| wp++) | |
| wc -= stride; | |
| } while (wc > 0); | |
| } | |
| return 1; | |
| } | |
| static int swabHorAcc32(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| uint32_t *wp = (uint32_t *)cp0; | |
| tmsize_t wc = cc / 4; | |
| TIFFSwabArrayOfLong(wp, wc); | |
| return horAcc32(tif, cp0, cc); | |
| } | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horAcc32(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| tmsize_t stride = PredictorState(tif)->stride; | |
| uint32_t *wp = (uint32_t *)cp0; | |
| tmsize_t wc = cc / 4; | |
| if ((cc % (4 * stride)) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horAcc32", "%s", "cc%(4*stride))!=0"); | |
| return 0; | |
| } | |
| if (wc > stride) | |
| { | |
| wc -= stride; | |
| do | |
| { | |
| REPEAT4(stride, wp[stride] += wp[0]; wp++) | |
| wc -= stride; | |
| } while (wc > 0); | |
| } | |
| return 1; | |
| } | |
| static int swabHorAcc64(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| uint64_t *wp = (uint64_t *)cp0; | |
| tmsize_t wc = cc / 8; | |
| TIFFSwabArrayOfLong8(wp, wc); | |
| return horAcc64(tif, cp0, cc); | |
| } | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horAcc64(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| tmsize_t stride = PredictorState(tif)->stride; | |
| uint64_t *wp = (uint64_t *)cp0; | |
| tmsize_t wc = cc / 8; | |
| if ((cc % (8 * stride)) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horAcc64", "%s", "cc%(8*stride))!=0"); | |
| return 0; | |
| } | |
| if (wc > stride) | |
| { | |
| wc -= stride; | |
| do | |
| { | |
| REPEAT4(stride, wp[stride] += wp[0]; wp++) | |
| wc -= stride; | |
| } while (wc > 0); | |
| } | |
| return 1; | |
| } | |
| /* | |
| * Floating point predictor accumulation routine. | |
| */ | |
| static int fpAcc(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| tmsize_t stride = PredictorState(tif)->stride; | |
| uint32_t bps = tif->tif_dir.td_bitspersample / 8; | |
| tmsize_t wc = cc / bps; | |
| tmsize_t count = cc; | |
| uint8_t *cp = cp0; | |
| uint8_t *tmp; | |
| if (cc % (bps * stride) != 0) | |
| { | |
| TIFFErrorExtR(tif, "fpAcc", "%s", "cc%(bps*stride))!=0"); | |
| return 0; | |
| } | |
| tmp = (uint8_t *)_TIFFmallocExt(tif, cc); | |
| if (!tmp) | |
| return 0; | |
| if (stride == 1) | |
| { | |
| /* Optimization of general case */ | |
| #define OP \ | |
| do \ | |
| { \ | |
| cp[1] = (uint8_t)((cp[1] + cp[0]) & 0xff); \ | |
| ++cp; \ | |
| } while (0) | |
| for (; count > 8; count -= 8) | |
| { | |
| OP; | |
| OP; | |
| OP; | |
| OP; | |
| OP; | |
| OP; | |
| OP; | |
| OP; | |
| } | |
| for (; count > 1; count -= 1) | |
| { | |
| OP; | |
| } | |
| #undef OP | |
| } | |
| else | |
| { | |
| while (count > stride) | |
| { | |
| REPEAT4(stride, cp[stride] = (uint8_t)((cp[stride] + cp[0]) & 0xff); | |
| cp++) | |
| count -= stride; | |
| } | |
| } | |
| _TIFFmemcpy(tmp, cp0, cc); | |
| cp = (uint8_t *)cp0; | |
| count = 0; | |
| #if defined(__x86_64__) || (defined(_M_X64) && !defined(_M_ARM64EC)) | |
| if (bps == 4) | |
| { | |
| /* Optimization of general case */ | |
| for (; count + 15 < wc; count += 16) | |
| { | |
| /* Interlace 4*16 byte values */ | |
| __m128i xmm0 = | |
| _mm_loadu_si128((const __m128i *)(tmp + count + 3 * wc)); | |
| __m128i xmm1 = | |
| _mm_loadu_si128((const __m128i *)(tmp + count + 2 * wc)); | |
| __m128i xmm2 = | |
| _mm_loadu_si128((const __m128i *)(tmp + count + 1 * wc)); | |
| __m128i xmm3 = | |
| _mm_loadu_si128((const __m128i *)(tmp + count + 0 * wc)); | |
| /* (xmm0_0, xmm1_0, xmm0_1, xmm1_1, xmm0_2, xmm1_2, ...) */ | |
| __m128i tmp0 = _mm_unpacklo_epi8(xmm0, xmm1); | |
| /* (xmm0_8, xmm1_8, xmm0_9, xmm1_9, xmm0_10, xmm1_10, ...) */ | |
| __m128i tmp1 = _mm_unpackhi_epi8(xmm0, xmm1); | |
| /* (xmm2_0, xmm3_0, xmm2_1, xmm3_1, xmm2_2, xmm3_2, ...) */ | |
| __m128i tmp2 = _mm_unpacklo_epi8(xmm2, xmm3); | |
| /* (xmm2_8, xmm3_8, xmm2_9, xmm3_9, xmm2_10, xmm3_10, ...) */ | |
| __m128i tmp3 = _mm_unpackhi_epi8(xmm2, xmm3); | |
| /* (xmm0_0, xmm1_0, xmm2_0, xmm3_0, xmm0_1, xmm1_1, xmm2_1, xmm3_1, | |
| * ...) */ | |
| __m128i tmp2_0 = _mm_unpacklo_epi16(tmp0, tmp2); | |
| __m128i tmp2_1 = _mm_unpackhi_epi16(tmp0, tmp2); | |
| __m128i tmp2_2 = _mm_unpacklo_epi16(tmp1, tmp3); | |
| __m128i tmp2_3 = _mm_unpackhi_epi16(tmp1, tmp3); | |
| _mm_storeu_si128((__m128i *)(cp + 4 * count + 0 * 16), tmp2_0); | |
| _mm_storeu_si128((__m128i *)(cp + 4 * count + 1 * 16), tmp2_1); | |
| _mm_storeu_si128((__m128i *)(cp + 4 * count + 2 * 16), tmp2_2); | |
| _mm_storeu_si128((__m128i *)(cp + 4 * count + 3 * 16), tmp2_3); | |
| } | |
| } | |
| #endif | |
| for (; count < wc; count++) | |
| { | |
| uint32_t byte; | |
| for (byte = 0; byte < bps; byte++) | |
| { | |
| #if WORDS_BIGENDIAN | |
| cp[bps * count + byte] = tmp[byte * wc + count]; | |
| #else | |
| cp[bps * count + byte] = tmp[(bps - byte - 1) * wc + count]; | |
| #endif | |
| } | |
| } | |
| _TIFFfreeExt(tif, tmp); | |
| return 1; | |
| } | |
| /* | |
| * Decode a scanline and apply the predictor routine. | |
| */ | |
| static int PredictorDecodeRow(TIFF *tif, uint8_t *op0, tmsize_t occ0, | |
| uint16_t s) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| assert(sp != NULL); | |
| assert(sp->decoderow != NULL); | |
| assert(sp->decodepfunc != NULL); | |
| if ((*sp->decoderow)(tif, op0, occ0, s)) | |
| { | |
| return (*sp->decodepfunc)(tif, op0, occ0); | |
| } | |
| else | |
| return 0; | |
| } | |
| /* | |
| * Decode a tile/strip and apply the predictor routine. | |
| * Note that horizontal differencing must be done on a | |
| * row-by-row basis. The width of a "row" has already | |
| * been calculated at pre-decode time according to the | |
| * strip/tile dimensions. | |
| */ | |
| static int PredictorDecodeTile(TIFF *tif, uint8_t *op0, tmsize_t occ0, | |
| uint16_t s) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| assert(sp != NULL); | |
| assert(sp->decodetile != NULL); | |
| if ((*sp->decodetile)(tif, op0, occ0, s)) | |
| { | |
| tmsize_t rowsize = sp->rowsize; | |
| assert(rowsize > 0); | |
| if ((occ0 % rowsize) != 0) | |
| { | |
| TIFFErrorExtR(tif, "PredictorDecodeTile", "%s", | |
| "occ0%rowsize != 0"); | |
| return 0; | |
| } | |
| assert(sp->decodepfunc != NULL); | |
| while (occ0 > 0) | |
| { | |
| if (!(*sp->decodepfunc)(tif, op0, rowsize)) | |
| return 0; | |
| occ0 -= rowsize; | |
| op0 += rowsize; | |
| } | |
| return 1; | |
| } | |
| else | |
| return 0; | |
| } | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horDiff8(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| tmsize_t stride = sp->stride; | |
| unsigned char *cp = (unsigned char *)cp0; | |
| if ((cc % stride) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horDiff8", "%s", "(cc%stride)!=0"); | |
| return 0; | |
| } | |
| if (cc > stride) | |
| { | |
| cc -= stride; | |
| /* | |
| * Pipeline the most common cases. | |
| */ | |
| if (stride == 3) | |
| { | |
| unsigned int r1, g1, b1; | |
| unsigned int r2 = cp[0]; | |
| unsigned int g2 = cp[1]; | |
| unsigned int b2 = cp[2]; | |
| do | |
| { | |
| r1 = cp[3]; | |
| cp[3] = (unsigned char)((r1 - r2) & 0xff); | |
| r2 = r1; | |
| g1 = cp[4]; | |
| cp[4] = (unsigned char)((g1 - g2) & 0xff); | |
| g2 = g1; | |
| b1 = cp[5]; | |
| cp[5] = (unsigned char)((b1 - b2) & 0xff); | |
| b2 = b1; | |
| cp += 3; | |
| } while ((cc -= 3) > 0); | |
| } | |
| else if (stride == 4) | |
| { | |
| unsigned int r1, g1, b1, a1; | |
| unsigned int r2 = cp[0]; | |
| unsigned int g2 = cp[1]; | |
| unsigned int b2 = cp[2]; | |
| unsigned int a2 = cp[3]; | |
| do | |
| { | |
| r1 = cp[4]; | |
| cp[4] = (unsigned char)((r1 - r2) & 0xff); | |
| r2 = r1; | |
| g1 = cp[5]; | |
| cp[5] = (unsigned char)((g1 - g2) & 0xff); | |
| g2 = g1; | |
| b1 = cp[6]; | |
| cp[6] = (unsigned char)((b1 - b2) & 0xff); | |
| b2 = b1; | |
| a1 = cp[7]; | |
| cp[7] = (unsigned char)((a1 - a2) & 0xff); | |
| a2 = a1; | |
| cp += 4; | |
| } while ((cc -= 4) > 0); | |
| } | |
| else | |
| { | |
| cp += cc - 1; | |
| do | |
| { | |
| REPEAT4(stride, | |
| cp[stride] = | |
| (unsigned char)((cp[stride] - cp[0]) & 0xff); | |
| cp--) | |
| } while ((cc -= stride) > 0); | |
| } | |
| } | |
| return 1; | |
| } | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horDiff16(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| tmsize_t stride = sp->stride; | |
| uint16_t *wp = (uint16_t *)cp0; | |
| tmsize_t wc = cc / 2; | |
| if ((cc % (2 * stride)) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horDiff8", "%s", "(cc%(2*stride))!=0"); | |
| return 0; | |
| } | |
| if (wc > stride) | |
| { | |
| wc -= stride; | |
| wp += wc - 1; | |
| do | |
| { | |
| REPEAT4(stride, wp[stride] = (uint16_t)(((unsigned int)wp[stride] - | |
| (unsigned int)wp[0]) & | |
| 0xffff); | |
| wp--) | |
| wc -= stride; | |
| } while (wc > 0); | |
| } | |
| return 1; | |
| } | |
| static int swabHorDiff16(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| uint16_t *wp = (uint16_t *)cp0; | |
| tmsize_t wc = cc / 2; | |
| if (!horDiff16(tif, cp0, cc)) | |
| return 0; | |
| TIFFSwabArrayOfShort(wp, wc); | |
| return 1; | |
| } | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horDiff32(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| tmsize_t stride = sp->stride; | |
| uint32_t *wp = (uint32_t *)cp0; | |
| tmsize_t wc = cc / 4; | |
| if ((cc % (4 * stride)) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horDiff32", "%s", "(cc%(4*stride))!=0"); | |
| return 0; | |
| } | |
| if (wc > stride) | |
| { | |
| wc -= stride; | |
| wp += wc - 1; | |
| do | |
| { | |
| REPEAT4(stride, wp[stride] -= wp[0]; wp--) | |
| wc -= stride; | |
| } while (wc > 0); | |
| } | |
| return 1; | |
| } | |
| static int swabHorDiff32(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| uint32_t *wp = (uint32_t *)cp0; | |
| tmsize_t wc = cc / 4; | |
| if (!horDiff32(tif, cp0, cc)) | |
| return 0; | |
| TIFFSwabArrayOfLong(wp, wc); | |
| return 1; | |
| } | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int horDiff64(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| tmsize_t stride = sp->stride; | |
| uint64_t *wp = (uint64_t *)cp0; | |
| tmsize_t wc = cc / 8; | |
| if ((cc % (8 * stride)) != 0) | |
| { | |
| TIFFErrorExtR(tif, "horDiff64", "%s", "(cc%(8*stride))!=0"); | |
| return 0; | |
| } | |
| if (wc > stride) | |
| { | |
| wc -= stride; | |
| wp += wc - 1; | |
| do | |
| { | |
| REPEAT4(stride, wp[stride] -= wp[0]; wp--) | |
| wc -= stride; | |
| } while (wc > 0); | |
| } | |
| return 1; | |
| } | |
| static int swabHorDiff64(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| uint64_t *wp = (uint64_t *)cp0; | |
| tmsize_t wc = cc / 8; | |
| if (!horDiff64(tif, cp0, cc)) | |
| return 0; | |
| TIFFSwabArrayOfLong8(wp, wc); | |
| return 1; | |
| } | |
| /* | |
| * Floating point predictor differencing routine. | |
| */ | |
| TIFF_NOSANITIZE_UNSIGNED_INT_OVERFLOW | |
| static int fpDiff(TIFF *tif, uint8_t *cp0, tmsize_t cc) | |
| { | |
| tmsize_t stride = PredictorState(tif)->stride; | |
| uint32_t bps = tif->tif_dir.td_bitspersample / 8; | |
| tmsize_t wc = cc / bps; | |
| tmsize_t count; | |
| uint8_t *cp = (uint8_t *)cp0; | |
| uint8_t *tmp; | |
| if ((cc % (bps * stride)) != 0) | |
| { | |
| TIFFErrorExtR(tif, "fpDiff", "%s", "(cc%(bps*stride))!=0"); | |
| return 0; | |
| } | |
| tmp = (uint8_t *)_TIFFmallocExt(tif, cc); | |
| if (!tmp) | |
| return 0; | |
| _TIFFmemcpy(tmp, cp0, cc); | |
| for (count = 0; count < wc; count++) | |
| { | |
| uint32_t byte; | |
| for (byte = 0; byte < bps; byte++) | |
| { | |
| #if WORDS_BIGENDIAN | |
| cp[byte * wc + count] = tmp[bps * count + byte]; | |
| #else | |
| cp[(bps - byte - 1) * wc + count] = tmp[bps * count + byte]; | |
| #endif | |
| } | |
| } | |
| _TIFFfreeExt(tif, tmp); | |
| cp = (uint8_t *)cp0; | |
| cp += cc - stride - 1; | |
| for (count = cc; count > stride; count -= stride) | |
| REPEAT4(stride, | |
| cp[stride] = (unsigned char)((cp[stride] - cp[0]) & 0xff); | |
| cp--) | |
| return 1; | |
| } | |
| static int PredictorEncodeRow(TIFF *tif, uint8_t *bp, tmsize_t cc, uint16_t s) | |
| { | |
| static const char module[] = "PredictorEncodeRow"; | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| uint8_t *working_copy; | |
| int result_code; | |
| assert(sp != NULL); | |
| assert(sp->encodepfunc != NULL); | |
| assert(sp->encoderow != NULL); | |
| /* | |
| * Do predictor manipulation in a working buffer to avoid altering | |
| * the callers buffer, like for PredictorEncodeTile(). | |
| * https://gitlab.com/libtiff/libtiff/-/issues/5 | |
| */ | |
| working_copy = (uint8_t *)_TIFFmallocExt(tif, cc); | |
| if (working_copy == NULL) | |
| { | |
| TIFFErrorExtR(tif, module, | |
| "Out of memory allocating %" PRId64 " byte temp buffer.", | |
| (int64_t)cc); | |
| return 0; | |
| } | |
| memcpy(working_copy, bp, (size_t)cc); | |
| if (!(*sp->encodepfunc)(tif, working_copy, cc)) | |
| { | |
| _TIFFfreeExt(tif, working_copy); | |
| return 0; | |
| } | |
| result_code = (*sp->encoderow)(tif, working_copy, cc, s); | |
| _TIFFfreeExt(tif, working_copy); | |
| return result_code; | |
| } | |
| static int PredictorEncodeTile(TIFF *tif, uint8_t *bp0, tmsize_t cc0, | |
| uint16_t s) | |
| { | |
| static const char module[] = "PredictorEncodeTile"; | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| uint8_t *working_copy; | |
| tmsize_t cc = cc0, rowsize; | |
| unsigned char *bp; | |
| int result_code; | |
| 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_t *)_TIFFmallocExt(tif, cc0); | |
| if (working_copy == NULL) | |
| { | |
| TIFFErrorExtR(tif, module, | |
| "Out of memory allocating %" PRId64 " byte temp buffer.", | |
| (int64_t)cc0); | |
| return 0; | |
| } | |
| memcpy(working_copy, bp0, (size_t)cc0); | |
| bp = working_copy; | |
| rowsize = sp->rowsize; | |
| assert(rowsize > 0); | |
| if ((cc0 % rowsize) != 0) | |
| { | |
| TIFFErrorExtR(tif, "PredictorEncodeTile", "%s", "(cc0%rowsize)!=0"); | |
| _TIFFfreeExt(tif, working_copy); | |
| return 0; | |
| } | |
| while (cc > 0) | |
| { | |
| (*sp->encodepfunc)(tif, bp, rowsize); | |
| cc -= rowsize; | |
| bp += rowsize; | |
| } | |
| result_code = (*sp->encodetile)(tif, working_copy, cc0, s); | |
| _TIFFfreeExt(tif, working_copy); | |
| return result_code; | |
| } | |
| #define FIELD_PREDICTOR (FIELD_CODEC + 0) /* XXX */ | |
| static const TIFFField predictFields[] = { | |
| {TIFFTAG_PREDICTOR, 1, 1, TIFF_SHORT, 0, TIFF_SETGET_UINT16, | |
| FIELD_PREDICTOR, FALSE, FALSE, "Predictor", NULL}, | |
| }; | |
| static int PredictorVSetField(TIFF *tif, uint32_t tag, va_list ap) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| assert(sp != NULL); | |
| assert(sp->vsetparent != NULL); | |
| switch (tag) | |
| { | |
| case TIFFTAG_PREDICTOR: | |
| sp->predictor = (uint16_t)va_arg(ap, uint16_vap); | |
| TIFFSetFieldBit(tif, FIELD_PREDICTOR); | |
| break; | |
| default: | |
| return (*sp->vsetparent)(tif, tag, ap); | |
| } | |
| tif->tif_flags |= TIFF_DIRTYDIRECT; | |
| return 1; | |
| } | |
| static int PredictorVGetField(TIFF *tif, uint32_t tag, va_list ap) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| assert(sp != NULL); | |
| assert(sp->vgetparent != NULL); | |
| switch (tag) | |
| { | |
| case TIFFTAG_PREDICTOR: | |
| *va_arg(ap, uint16_t *) = (uint16_t)sp->predictor; | |
| break; | |
| default: | |
| return (*sp->vgetparent)(tif, tag, ap); | |
| } | |
| return 1; | |
| } | |
| static void PredictorPrintDir(TIFF *tif, FILE *fd, long flags) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| (void)flags; | |
| if (TIFFFieldSet(tif, FIELD_PREDICTOR)) | |
| { | |
| fprintf(fd, " Predictor: "); | |
| switch (sp->predictor) | |
| { | |
| case 1: | |
| fprintf(fd, "none "); | |
| break; | |
| case 2: | |
| fprintf(fd, "horizontal differencing "); | |
| break; | |
| case 3: | |
| fprintf(fd, "floating point predictor "); | |
| break; | |
| default: | |
| break; | |
| } | |
| fprintf(fd, "%d (0x%x)\n", sp->predictor, (unsigned)sp->predictor); | |
| } | |
| if (sp->printdir) | |
| (*sp->printdir)(tif, fd, flags); | |
| } | |
| int TIFFPredictorInit(TIFF *tif) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| assert(sp != 0); | |
| /* | |
| * Merge codec-specific tag information. | |
| */ | |
| if (!_TIFFMergeFields(tif, predictFields, TIFFArrayCount(predictFields))) | |
| { | |
| TIFFErrorExtR(tif, "TIFFPredictorInit", | |
| "Merging Predictor codec-specific tags failed"); | |
| return 0; | |
| } | |
| /* | |
| * Override parent get/set field methods. | |
| */ | |
| sp->vgetparent = tif->tif_tagmethods.vgetfield; | |
| tif->tif_tagmethods.vgetfield = | |
| PredictorVGetField; /* hook for predictor tag */ | |
| sp->vsetparent = tif->tif_tagmethods.vsetfield; | |
| tif->tif_tagmethods.vsetfield = | |
| PredictorVSetField; /* hook for predictor tag */ | |
| sp->printdir = tif->tif_tagmethods.printdir; | |
| tif->tif_tagmethods.printdir = | |
| PredictorPrintDir; /* hook for predictor tag */ | |
| sp->setupdecode = tif->tif_setupdecode; | |
| tif->tif_setupdecode = PredictorSetupDecode; | |
| sp->setupencode = tif->tif_setupencode; | |
| tif->tif_setupencode = PredictorSetupEncode; | |
| sp->predictor = 1; /* default value */ | |
| sp->encodepfunc = NULL; /* no predictor routine */ | |
| sp->decodepfunc = NULL; /* no predictor routine */ | |
| return 1; | |
| } | |
| int TIFFPredictorCleanup(TIFF *tif) | |
| { | |
| TIFFPredictorState *sp = PredictorState(tif); | |
| assert(sp != 0); | |
| tif->tif_tagmethods.vgetfield = sp->vgetparent; | |
| tif->tif_tagmethods.vsetfield = sp->vsetparent; | |
| tif->tif_tagmethods.printdir = sp->printdir; | |
| tif->tif_setupdecode = sp->setupdecode; | |
| tif->tif_setupencode = sp->setupencode; | |
| return 1; | |
| } |