/* $Id: tif_pixarlog.c,v 1.15.2.4 2010-06-08 18:50:42 bfriesen Exp $ */ /* * Copyright (c) 1996-1997 Sam Leffler * Copyright (c) 1996 Pixar * * 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 * Pixar, 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 Pixar, 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 PIXAR, 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 PIXARLOG_SUPPORT /* * TIFF Library. * PixarLog Compression Support * * Contributed by Dan McCoy. * * PixarLog film support uses the TIFF library to store companded * 11 bit values into a tiff file, which are compressed using the * zip compressor. * * The codec can take as input and produce as output 32-bit IEEE float values * as well as 16-bit or 8-bit unsigned integer values. * * On writing any of the above are converted into the internal * 11-bit log format. In the case of 8 and 16 bit values, the * input is assumed to be unsigned linear color values that represent * the range 0-1. In the case of IEEE values, the 0-1 range is assumed to * be the normal linear color range, in addition over 1 values are * accepted up to a value of about 25.0 to encode "hot" hightlights and such. * The encoding is lossless for 8-bit values, slightly lossy for the * other bit depths. The actual color precision should be better * than the human eye can perceive with extra room to allow for * error introduced by further image computation. As with any quantized * color format, it is possible to perform image calculations which * expose the quantization error. This format should certainly be less * susceptable to such errors than standard 8-bit encodings, but more * susceptable than straight 16-bit or 32-bit encodings. * * On reading the internal format is converted to the desired output format. * The program can request which format it desires by setting the internal * pseudo tag TIFFTAG_PIXARLOGDATAFMT to one of these possible values: * PIXARLOGDATAFMT_FLOAT = provide IEEE float values. * PIXARLOGDATAFMT_16BIT = provide unsigned 16-bit integer values * PIXARLOGDATAFMT_8BIT = provide unsigned 8-bit integer values * * alternately PIXARLOGDATAFMT_8BITABGR provides unsigned 8-bit integer * values with the difference that if there are exactly three or four channels * (rgb or rgba) it swaps the channel order (bgr or abgr). * * PIXARLOGDATAFMT_11BITLOG provides the internal encoding directly * packed in 16-bit values. However no tools are supplied for interpreting * these values. * * "hot" (over 1.0) areas written in floating point get clamped to * 1.0 in the integer data types. * * When the file is closed after writing, the bit depth and sample format * are set always to appear as if 8-bit data has been written into it. * That way a naive program unaware of the particulars of the encoding * gets the format it is most likely able to handle. * * The codec does it's own horizontal differencing step on the coded * values so the libraries predictor stuff should be turned off. * The codec also handle byte swapping the encoded values as necessary * since the library does not have the information necessary * to know the bit depth of the raw unencoded buffer. * */ #include "tif_predict.h" #include "zlib.h" #include #include #include /* Tables for converting to/from 11 bit coded values */ #define TSIZE 2048 /* decode table size (11-bit tokens) */ #define TSIZEP1 2049 /* Plus one for slop */ #define ONE 1250 /* token value of 1.0 exactly */ #define RATIO 1.004 /* nominal ratio for log part */ #define CODE_MASK 0x7ff /* 11 bits. */ static float Fltsize; static float LogK1, LogK2; #define REPEAT(n, op) { int i; i=n; do { i--; op; } while (i>0); } static void horizontalAccumulateF(uint16 *wp, int n, int stride, float *op, float *ToLinearF) { register unsigned int cr, cg, cb, ca, mask; register float t0, t1, t2, t3; if (n >= stride) { mask = CODE_MASK; if (stride == 3) { t0 = ToLinearF[cr = wp[0]]; t1 = ToLinearF[cg = wp[1]]; t2 = ToLinearF[cb = wp[2]]; op[0] = t0; op[1] = t1; op[2] = t2; n -= 3; while (n > 0) { wp += 3; op += 3; n -= 3; t0 = ToLinearF[(cr += wp[0]) & mask]; t1 = ToLinearF[(cg += wp[1]) & mask]; t2 = ToLinearF[(cb += wp[2]) & mask]; op[0] = t0; op[1] = t1; op[2] = t2; } } else if (stride == 4) { t0 = ToLinearF[cr = wp[0]]; t1 = ToLinearF[cg = wp[1]]; t2 = ToLinearF[cb = wp[2]]; t3 = ToLinearF[ca = wp[3]]; op[0] = t0; op[1] = t1; op[2] = t2; op[3] = t3; n -= 4; while (n > 0) { wp += 4; op += 4; n -= 4; t0 = ToLinearF[(cr += wp[0]) & mask]; t1 = ToLinearF[(cg += wp[1]) & mask]; t2 = ToLinearF[(cb += wp[2]) & mask]; t3 = ToLinearF[(ca += wp[3]) & mask]; op[0] = t0; op[1] = t1; op[2] = t2; op[3] = t3; } } else { REPEAT(stride, *op = ToLinearF[*wp&mask]; wp++; op++) n -= stride; while (n > 0) { REPEAT(stride, wp[stride] += *wp; *op = ToLinearF[*wp&mask]; wp++; op++) n -= stride; } } } } static void horizontalAccumulate12(uint16 *wp, int n, int stride, int16 *op, float *ToLinearF) { register unsigned int cr, cg, cb, ca, mask; register float t0, t1, t2, t3; #define SCALE12 2048.0F #define CLAMP12(t) (((t) < 3071) ? (uint16) (t) : 3071) if (n >= stride) { mask = CODE_MASK; if (stride == 3) { t0 = ToLinearF[cr = wp[0]] * SCALE12; t1 = ToLinearF[cg = wp[1]] * SCALE12; t2 = ToLinearF[cb = wp[2]] * SCALE12; op[0] = CLAMP12(t0); op[1] = CLAMP12(t1); op[2] = CLAMP12(t2); n -= 3; while (n > 0) { wp += 3; op += 3; n -= 3; t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12; t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12; t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12; op[0] = CLAMP12(t0); op[1] = CLAMP12(t1); op[2] = CLAMP12(t2); } } else if (stride == 4) { t0 = ToLinearF[cr = wp[0]] * SCALE12; t1 = ToLinearF[cg = wp[1]] * SCALE12; t2 = ToLinearF[cb = wp[2]] * SCALE12; t3 = ToLinearF[ca = wp[3]] * SCALE12; op[0] = CLAMP12(t0); op[1] = CLAMP12(t1); op[2] = CLAMP12(t2); op[3] = CLAMP12(t3); n -= 4; while (n > 0) { wp += 4; op += 4; n -= 4; t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12; t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12; t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12; t3 = ToLinearF[(ca += wp[3]) & mask] * SCALE12; op[0] = CLAMP12(t0); op[1] = CLAMP12(t1); op[2] = CLAMP12(t2); op[3] = CLAMP12(t3); } } else { REPEAT(stride, t0 = ToLinearF[*wp&mask] * SCALE12; *op = CLAMP12(t0); wp++; op++) n -= stride; while (n > 0) { REPEAT(stride, wp[stride] += *wp; t0 = ToLinearF[wp[stride]&mask]*SCALE12; *op = CLAMP12(t0); wp++; op++) n -= stride; } } } } static void horizontalAccumulate16(uint16 *wp, int n, int stride, uint16 *op, uint16 *ToLinear16) { register unsigned int cr, cg, cb, ca, mask; if (n >= stride) { mask = CODE_MASK; if (stride == 3) { op[0] = ToLinear16[cr = wp[0]]; op[1] = ToLinear16[cg = wp[1]]; op[2] = ToLinear16[cb = wp[2]]; n -= 3; while (n > 0) { wp += 3; op += 3; n -= 3; op[0] = ToLinear16[(cr += wp[0]) & mask]; op[1] = ToLinear16[(cg += wp[1]) & mask]; op[2] = ToLinear16[(cb += wp[2]) & mask]; } } else if (stride == 4) { op[0] = ToLinear16[cr = wp[0]]; op[1] = ToLinear16[cg = wp[1]]; op[2] = ToLinear16[cb = wp[2]]; op[3] = ToLinear16[ca = wp[3]]; n -= 4; while (n > 0) { wp += 4; op += 4; n -= 4; op[0] = ToLinear16[(cr += wp[0]) & mask]; op[1] = ToLinear16[(cg += wp[1]) & mask]; op[2] = ToLinear16[(cb += wp[2]) & mask]; op[3] = ToLinear16[(ca += wp[3]) & mask]; } } else { REPEAT(stride, *op = ToLinear16[*wp&mask]; wp++; op++) n -= stride; while (n > 0) { REPEAT(stride, wp[stride] += *wp; *op = ToLinear16[*wp&mask]; wp++; op++) n -= stride; } } } } /* * Returns the log encoded 11-bit values with the horizontal * differencing undone. */ static void horizontalAccumulate11(uint16 *wp, int n, int stride, uint16 *op) { register unsigned int cr, cg, cb, ca, mask; if (n >= stride) { mask = CODE_MASK; if (stride == 3) { op[0] = cr = wp[0]; op[1] = cg = wp[1]; op[2] = cb = wp[2]; n -= 3; while (n > 0) { wp += 3; op += 3; n -= 3; op[0] = (cr += wp[0]) & mask; op[1] = (cg += wp[1]) & mask; op[2] = (cb += wp[2]) & mask; } } else if (stride == 4) { op[0] = cr = wp[0]; op[1] = cg = wp[1]; op[2] = cb = wp[2]; op[3] = ca = wp[3]; n -= 4; while (n > 0) { wp += 4; op += 4; n -= 4; op[0] = (cr += wp[0]) & mask; op[1] = (cg += wp[1]) & mask; op[2] = (cb += wp[2]) & mask; op[3] = (ca += wp[3]) & mask; } } else { REPEAT(stride, *op = *wp&mask; wp++; op++) n -= stride; while (n > 0) { REPEAT(stride, wp[stride] += *wp; *op = *wp&mask; wp++; op++) n -= stride; } } } } static void horizontalAccumulate8(uint16 *wp, int n, int stride, unsigned char *op, unsigned char *ToLinear8) { register unsigned int cr, cg, cb, ca, mask; if (n >= stride) { mask = CODE_MASK; if (stride == 3) { op[0] = ToLinear8[cr = wp[0]]; op[1] = ToLinear8[cg = wp[1]]; op[2] = ToLinear8[cb = wp[2]]; n -= 3; while (n > 0) { n -= 3; wp += 3; op += 3; op[0] = ToLinear8[(cr += wp[0]) & mask]; op[1] = ToLinear8[(cg += wp[1]) & mask]; op[2] = ToLinear8[(cb += wp[2]) & mask]; } } else if (stride == 4) { op[0] = ToLinear8[cr = wp[0]]; op[1] = ToLinear8[cg = wp[1]]; op[2] = ToLinear8[cb = wp[2]]; op[3] = ToLinear8[ca = wp[3]]; n -= 4; while (n > 0) { n -= 4; wp += 4; op += 4; op[0] = ToLinear8[(cr += wp[0]) & mask]; op[1] = ToLinear8[(cg += wp[1]) & mask]; op[2] = ToLinear8[(cb += wp[2]) & mask]; op[3] = ToLinear8[(ca += wp[3]) & mask]; } } else { REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++) n -= stride; while (n > 0) { REPEAT(stride, wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++) n -= stride; } } } } static void horizontalAccumulate8abgr(uint16 *wp, int n, int stride, unsigned char *op, unsigned char *ToLinear8) { register unsigned int cr, cg, cb, ca, mask; register unsigned char t0, t1, t2, t3; if (n >= stride) { mask = CODE_MASK; if (stride == 3) { op[0] = 0; t1 = ToLinear8[cb = wp[2]]; t2 = ToLinear8[cg = wp[1]]; t3 = ToLinear8[cr = wp[0]]; op[1] = t1; op[2] = t2; op[3] = t3; n -= 3; while (n > 0) { n -= 3; wp += 3; op += 4; op[0] = 0; t1 = ToLinear8[(cb += wp[2]) & mask]; t2 = ToLinear8[(cg += wp[1]) & mask]; t3 = ToLinear8[(cr += wp[0]) & mask]; op[1] = t1; op[2] = t2; op[3] = t3; } } else if (stride == 4) { t0 = ToLinear8[ca = wp[3]]; t1 = ToLinear8[cb = wp[2]]; t2 = ToLinear8[cg = wp[1]]; t3 = ToLinear8[cr = wp[0]]; op[0] = t0; op[1] = t1; op[2] = t2; op[3] = t3; n -= 4; while (n > 0) { n -= 4; wp += 4; op += 4; t0 = ToLinear8[(ca += wp[3]) & mask]; t1 = ToLinear8[(cb += wp[2]) & mask]; t2 = ToLinear8[(cg += wp[1]) & mask]; t3 = ToLinear8[(cr += wp[0]) & mask]; op[0] = t0; op[1] = t1; op[2] = t2; op[3] = t3; } } else { REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++) n -= stride; while (n > 0) { REPEAT(stride, wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++) n -= stride; } } } } /* * State block for each open TIFF * file using PixarLog compression/decompression. */ typedef struct { TIFFPredictorState predict; z_stream stream; uint16 *tbuf; uint16 stride; int state; int user_datafmt; int quality; #define PLSTATE_INIT 1 TIFFVSetMethod vgetparent; /* super-class method */ TIFFVSetMethod vsetparent; /* super-class method */ float *ToLinearF; uint16 *ToLinear16; unsigned char *ToLinear8; uint16 *FromLT2; uint16 *From14; /* Really for 16-bit data, but we shift down 2 */ uint16 *From8; } PixarLogState; static int PixarLogMakeTables(PixarLogState *sp) { /* * We make several tables here to convert between various external * representations (float, 16-bit, and 8-bit) and the internal * 11-bit companded representation. The 11-bit representation has two * distinct regions. A linear bottom end up through .018316 in steps * of about .000073, and a region of constant ratio up to about 25. * These floating point numbers are stored in the main table ToLinearF. * All other tables are derived from this one. The tables (and the * ratios) are continuous at the internal seam. */ int nlin, lt2size; int i, j; double b, c, linstep, v; float *ToLinearF; uint16 *ToLinear16; unsigned char *ToLinear8; uint16 *FromLT2; uint16 *From14; /* Really for 16-bit data, but we shift down 2 */ uint16 *From8; c = log(RATIO); nlin = (int)(1./c); /* nlin must be an integer */ c = 1./nlin; b = exp(-c*ONE); /* multiplicative scale factor [b*exp(c*ONE) = 1] */ linstep = b*c*exp(1.); LogK1 = (float)(1./c); /* if (v >= 2) token = k1*log(v*k2) */ LogK2 = (float)(1./b); lt2size = (int)(2./linstep) + 1; FromLT2 = (uint16 *)_TIFFmalloc(lt2size*sizeof(uint16)); From14 = (uint16 *)_TIFFmalloc(16384*sizeof(uint16)); From8 = (uint16 *)_TIFFmalloc(256*sizeof(uint16)); ToLinearF = (float *)_TIFFmalloc(TSIZEP1 * sizeof(float)); ToLinear16 = (uint16 *)_TIFFmalloc(TSIZEP1 * sizeof(uint16)); ToLinear8 = (unsigned char *)_TIFFmalloc(TSIZEP1 * sizeof(unsigned char)); if (FromLT2 == NULL || From14 == NULL || From8 == NULL || ToLinearF == NULL || ToLinear16 == NULL || ToLinear8 == NULL) { if (FromLT2) _TIFFfree(FromLT2); if (From14) _TIFFfree(From14); if (From8) _TIFFfree(From8); if (ToLinearF) _TIFFfree(ToLinearF); if (ToLinear16) _TIFFfree(ToLinear16); if (ToLinear8) _TIFFfree(ToLinear8); sp->FromLT2 = NULL; sp->From14 = NULL; sp->From8 = NULL; sp->ToLinearF = NULL; sp->ToLinear16 = NULL; sp->ToLinear8 = NULL; return 0; } j = 0; for (i = 0; i < nlin; i++) { v = i * linstep; ToLinearF[j++] = (float)v; } for (i = nlin; i < TSIZE; i++) ToLinearF[j++] = (float)(b*exp(c*i)); ToLinearF[2048] = ToLinearF[2047]; for (i = 0; i < TSIZEP1; i++) { v = ToLinearF[i]*65535.0 + 0.5; ToLinear16[i] = (v > 65535.0) ? 65535 : (uint16)v; v = ToLinearF[i]*255.0 + 0.5; ToLinear8[i] = (v > 255.0) ? 255 : (unsigned char)v; } j = 0; for (i = 0; i < lt2size; i++) { if ((i*linstep)*(i*linstep) > ToLinearF[j]*ToLinearF[j+1]) j++; FromLT2[i] = j; } /* * Since we lose info anyway on 16-bit data, we set up a 14-bit * table and shift 16-bit values down two bits on input. * saves a little table space. */ j = 0; for (i = 0; i < 16384; i++) { while ((i/16383.)*(i/16383.) > ToLinearF[j]*ToLinearF[j+1]) j++; From14[i] = j; } j = 0; for (i = 0; i < 256; i++) { while ((i/255.)*(i/255.) > ToLinearF[j]*ToLinearF[j+1]) j++; From8[i] = j; } Fltsize = (float)(lt2size/2); sp->ToLinearF = ToLinearF; sp->ToLinear16 = ToLinear16; sp->ToLinear8 = ToLinear8; sp->FromLT2 = FromLT2; sp->From14 = From14; sp->From8 = From8; return 1; } #define DecoderState(tif) ((PixarLogState*) (tif)->tif_data) #define EncoderState(tif) ((PixarLogState*) (tif)->tif_data) static int PixarLogEncode(TIFF*, tidata_t, tsize_t, tsample_t); static int PixarLogDecode(TIFF*, tidata_t, tsize_t, tsample_t); #define PIXARLOGDATAFMT_UNKNOWN -1 static int PixarLogGuessDataFmt(TIFFDirectory *td) { int guess = PIXARLOGDATAFMT_UNKNOWN; int format = td->td_sampleformat; /* If the user didn't tell us his datafmt, * take our best guess from the bitspersample. */ switch (td->td_bitspersample) { case 32: if (format == SAMPLEFORMAT_IEEEFP) guess = PIXARLOGDATAFMT_FLOAT; break; case 16: if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT) guess = PIXARLOGDATAFMT_16BIT; break; case 12: if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_INT) guess = PIXARLOGDATAFMT_12BITPICIO; break; case 11: if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT) guess = PIXARLOGDATAFMT_11BITLOG; break; case 8: if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT) guess = PIXARLOGDATAFMT_8BIT; break; } return guess; } static uint32 multiply(size_t m1, size_t m2) { uint32 bytes = m1 * m2; if (m1 && bytes / m1 != m2) bytes = 0; return bytes; } static int PixarLogSetupDecode(TIFF* tif) { TIFFDirectory *td = &tif->tif_dir; PixarLogState* sp = DecoderState(tif); tsize_t tbuf_size; static const char module[] = "PixarLogSetupDecode"; assert(sp != NULL); /* Make sure no byte swapping happens on the data * after decompression. */ tif->tif_postdecode = _TIFFNoPostDecode; /* for some reason, we can't do this in TIFFInitPixarLog */ sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ? td->td_samplesperpixel : 1); tbuf_size = multiply(multiply(multiply(sp->stride, td->td_imagewidth), td->td_rowsperstrip), sizeof(uint16)); if (tbuf_size == 0) return (0); sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size); if (sp->tbuf == NULL) return (0); if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) sp->user_datafmt = PixarLogGuessDataFmt(td); if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) { TIFFErrorExt(tif->tif_clientdata, module, "PixarLog compression can't handle bits depth/data format combination (depth: %d)", td->td_bitspersample); return (0); } if (inflateInit(&sp->stream) != Z_OK) { TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg); return (0); } else { sp->state |= PLSTATE_INIT; return (1); } } /* * Setup state for decoding a strip. */ static int PixarLogPreDecode(TIFF* tif, tsample_t s) { PixarLogState* sp = DecoderState(tif); (void) s; assert(sp != NULL); sp->stream.next_in = tif->tif_rawdata; sp->stream.avail_in = tif->tif_rawcc; return (inflateReset(&sp->stream) == Z_OK); } static int PixarLogDecode(TIFF* tif, tidata_t op, tsize_t occ, tsample_t s) { TIFFDirectory *td = &tif->tif_dir; PixarLogState* sp = DecoderState(tif); static const char module[] = "PixarLogDecode"; int i, nsamples, llen; uint16 *up; switch (sp->user_datafmt) { case PIXARLOGDATAFMT_FLOAT: nsamples = occ / sizeof(float); /* XXX float == 32 bits */ break; case PIXARLOGDATAFMT_16BIT: case PIXARLOGDATAFMT_12BITPICIO: case PIXARLOGDATAFMT_11BITLOG: nsamples = occ / sizeof(uint16); /* XXX uint16 == 16 bits */ break; case PIXARLOGDATAFMT_8BIT: case PIXARLOGDATAFMT_8BITABGR: nsamples = occ; break; default: TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%d bit input not supported in PixarLog", td->td_bitspersample); return 0; } llen = sp->stride * td->td_imagewidth; (void) s; assert(sp != NULL); sp->stream.next_out = (unsigned char *) sp->tbuf; sp->stream.avail_out = nsamples * sizeof(uint16); do { int state = inflate(&sp->stream, Z_PARTIAL_FLUSH); if (state == Z_STREAM_END) { break; /* XXX */ } if (state == Z_DATA_ERROR) { TIFFErrorExt(tif->tif_clientdata, module, "%s: Decoding error at scanline %d, %s", tif->tif_name, tif->tif_row, sp->stream.msg); if (inflateSync(&sp->stream) != Z_OK) return (0); continue; } if (state != Z_OK) { TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s", tif->tif_name, sp->stream.msg); return (0); } } while (sp->stream.avail_out > 0); /* hopefully, we got all the bytes we needed */ if (sp->stream.avail_out != 0) { TIFFErrorExt(tif->tif_clientdata, module, "%s: Not enough data at scanline %d (short %d bytes)", tif->tif_name, tif->tif_row, sp->stream.avail_out); return (0); } up = sp->tbuf; /* Swap bytes in the data if from a different endian machine. */ if (tif->tif_flags & TIFF_SWAB) TIFFSwabArrayOfShort(up, nsamples); /* * if llen is not an exact multiple of nsamples, the decode operation * may overflow the output buffer, so truncate it enough to prevent * that but still salvage as much data as possible. */ if (nsamples % llen) { TIFFWarningExt(tif->tif_clientdata, module, "%s: stride %d is not a multiple of sample count, " "%d, data truncated.", tif->tif_name, llen, nsamples); nsamples -= nsamples % llen; } for (i = 0; i < nsamples; i += llen, up += llen) { switch (sp->user_datafmt) { case PIXARLOGDATAFMT_FLOAT: horizontalAccumulateF(up, llen, sp->stride, (float *)op, sp->ToLinearF); op += llen * sizeof(float); break; case PIXARLOGDATAFMT_16BIT: horizontalAccumulate16(up, llen, sp->stride, (uint16 *)op, sp->ToLinear16); op += llen * sizeof(uint16); break; case PIXARLOGDATAFMT_12BITPICIO: horizontalAccumulate12(up, llen, sp->stride, (int16 *)op, sp->ToLinearF); op += llen * sizeof(int16); break; case PIXARLOGDATAFMT_11BITLOG: horizontalAccumulate11(up, llen, sp->stride, (uint16 *)op); op += llen * sizeof(uint16); break; case PIXARLOGDATAFMT_8BIT: horizontalAccumulate8(up, llen, sp->stride, (unsigned char *)op, sp->ToLinear8); op += llen * sizeof(unsigned char); break; case PIXARLOGDATAFMT_8BITABGR: horizontalAccumulate8abgr(up, llen, sp->stride, (unsigned char *)op, sp->ToLinear8); op += llen * sizeof(unsigned char); break; default: TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "PixarLogDecode: unsupported bits/sample: %d", td->td_bitspersample); return (0); } } return (1); } static int PixarLogSetupEncode(TIFF* tif) { TIFFDirectory *td = &tif->tif_dir; PixarLogState* sp = EncoderState(tif); tsize_t tbuf_size; static const char module[] = "PixarLogSetupEncode"; assert(sp != NULL); /* for some reason, we can't do this in TIFFInitPixarLog */ sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ? td->td_samplesperpixel : 1); tbuf_size = multiply(multiply(multiply(sp->stride, td->td_imagewidth), td->td_rowsperstrip), sizeof(uint16)); if (tbuf_size == 0) return (0); sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size); if (sp->tbuf == NULL) return (0); if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) sp->user_datafmt = PixarLogGuessDataFmt(td); if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) { TIFFErrorExt(tif->tif_clientdata, module, "PixarLog compression can't handle %d bit linear encodings", td->td_bitspersample); return (0); } if (deflateInit(&sp->stream, sp->quality) != Z_OK) { TIFFErrorExt(tif->tif_clientdata, module, "%s: %s", tif->tif_name, sp->stream.msg); return (0); } else { sp->state |= PLSTATE_INIT; return (1); } } /* * Reset encoding state at the start of a strip. */ static int PixarLogPreEncode(TIFF* tif, tsample_t s) { PixarLogState *sp = EncoderState(tif); (void) s; assert(sp != NULL); sp->stream.next_out = tif->tif_rawdata; sp->stream.avail_out = tif->tif_rawdatasize; return (deflateReset(&sp->stream) == Z_OK); } static void horizontalDifferenceF(float *ip, int n, int stride, uint16 *wp, uint16 *FromLT2) { int32 r1, g1, b1, a1, r2, g2, b2, a2, mask; float fltsize = Fltsize; #define CLAMP(v) ( (v<(float)0.) ? 0 \ : (v<(float)2.) ? FromLT2[(int)(v*fltsize)] \ : (v>(float)24.2) ? 2047 \ : LogK1*log(v*LogK2) + 0.5 ) mask = CODE_MASK; if (n >= stride) { if (stride == 3) { r2 = wp[0] = (uint16) CLAMP(ip[0]); g2 = wp[1] = (uint16) CLAMP(ip[1]); b2 = wp[2] = (uint16) CLAMP(ip[2]); n -= 3; while (n > 0) { n -= 3; wp += 3; ip += 3; r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; } } else if (stride == 4) { r2 = wp[0] = (uint16) CLAMP(ip[0]); g2 = wp[1] = (uint16) CLAMP(ip[1]); b2 = wp[2] = (uint16) CLAMP(ip[2]); a2 = wp[3] = (uint16) CLAMP(ip[3]); n -= 4; while (n > 0) { n -= 4; wp += 4; ip += 4; r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; a1 = (int32) CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1; } } else { ip += n - 1; /* point to last one */ wp += n - 1; /* point to last one */ n -= stride; while (n > 0) { REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]); wp[stride] -= wp[0]; wp[stride] &= mask; wp--; ip--) n -= stride; } REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]); wp--; ip--) } } } static void horizontalDifference16(unsigned short *ip, int n, int stride, unsigned short *wp, uint16 *From14) { register int r1, g1, b1, a1, r2, g2, b2, a2, mask; /* assumption is unsigned pixel values */ #undef CLAMP #define CLAMP(v) From14[(v) >> 2] mask = CODE_MASK; if (n >= stride) { if (stride == 3) { r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); b2 = wp[2] = CLAMP(ip[2]); n -= 3; while (n > 0) { n -= 3; wp += 3; ip += 3; r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; } } else if (stride == 4) { r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); b2 = wp[2] = CLAMP(ip[2]); a2 = wp[3] = CLAMP(ip[3]); n -= 4; while (n > 0) { n -= 4; wp += 4; ip += 4; r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1; g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1; b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1; a1 = CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1; } } else { ip += n - 1; /* point to last one */ wp += n - 1; /* point to last one */ n -= stride; while (n > 0) { REPEAT(stride, wp[0] = CLAMP(ip[0]); wp[stride] -= wp[0]; wp[stride] &= mask; wp--; ip--) n -= stride; } REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--) } } } static void horizontalDifference8(unsigned char *ip, int n, int stride, unsigned short *wp, uint16 *From8) { register int r1, g1, b1, a1, r2, g2, b2, a2, mask; #undef CLAMP #define CLAMP(v) (From8[(v)]) mask = CODE_MASK; if (n >= stride) { if (stride == 3) { r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); b2 = wp[2] = CLAMP(ip[2]); n -= 3; while (n > 0) { n -= 3; r1 = CLAMP(ip[3]); wp[3] = (r1-r2) & mask; r2 = r1; g1 = CLAMP(ip[4]); wp[4] = (g1-g2) & mask; g2 = g1; b1 = CLAMP(ip[5]); wp[5] = (b1-b2) & mask; b2 = b1; wp += 3; ip += 3; } } else if (stride == 4) { r2 = wp[0] = CLAMP(ip[0]); g2 = wp[1] = CLAMP(ip[1]); b2 = wp[2] = CLAMP(ip[2]); a2 = wp[3] = CLAMP(ip[3]); n -= 4; while (n > 0) { n -= 4; r1 = CLAMP(ip[4]); wp[4] = (r1-r2) & mask; r2 = r1; g1 = CLAMP(ip[5]); wp[5] = (g1-g2) & mask; g2 = g1; b1 = CLAMP(ip[6]); wp[6] = (b1-b2) & mask; b2 = b1; a1 = CLAMP(ip[7]); wp[7] = (a1-a2) & mask; a2 = a1; wp += 4; ip += 4; } } else { wp += n + stride - 1; /* point to last one */ ip += n + stride - 1; /* point to last one */ n -= stride; while (n > 0) { REPEAT(stride, wp[0] = CLAMP(ip[0]); wp[stride] -= wp[0]; wp[stride] &= mask; wp--; ip--) n -= stride; } REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--) } } } /* * Encode a chunk of pixels. */ static int PixarLogEncode(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s) { TIFFDirectory *td = &tif->tif_dir; PixarLogState *sp = EncoderState(tif); static const char module[] = "PixarLogEncode"; int i, n, llen; unsigned short * up; (void) s; switch (sp->user_datafmt) { case PIXARLOGDATAFMT_FLOAT: n = cc / sizeof(float); /* XXX float == 32 bits */ break; case PIXARLOGDATAFMT_16BIT: case PIXARLOGDATAFMT_12BITPICIO: case PIXARLOGDATAFMT_11BITLOG: n = cc / sizeof(uint16); /* XXX uint16 == 16 bits */ break; case PIXARLOGDATAFMT_8BIT: case PIXARLOGDATAFMT_8BITABGR: n = cc; break; default: TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%d bit input not supported in PixarLog", td->td_bitspersample); return 0; } llen = sp->stride * td->td_imagewidth; for (i = 0, up = sp->tbuf; i < n; i += llen, up += llen) { switch (sp->user_datafmt) { case PIXARLOGDATAFMT_FLOAT: horizontalDifferenceF((float *)bp, llen, sp->stride, up, sp->FromLT2); bp += llen * sizeof(float); break; case PIXARLOGDATAFMT_16BIT: horizontalDifference16((uint16 *)bp, llen, sp->stride, up, sp->From14); bp += llen * sizeof(uint16); break; case PIXARLOGDATAFMT_8BIT: horizontalDifference8((unsigned char *)bp, llen, sp->stride, up, sp->From8); bp += llen * sizeof(unsigned char); break; default: TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%d bit input not supported in PixarLog", td->td_bitspersample); return 0; } } sp->stream.next_in = (unsigned char *) sp->tbuf; sp->stream.avail_in = n * sizeof(uint16); do { if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) { TIFFErrorExt(tif->tif_clientdata, module, "%s: Encoder error: %s", tif->tif_name, sp->stream.msg); return (0); } if (sp->stream.avail_out == 0) { tif->tif_rawcc = tif->tif_rawdatasize; TIFFFlushData1(tif); sp->stream.next_out = tif->tif_rawdata; sp->stream.avail_out = tif->tif_rawdatasize; } } while (sp->stream.avail_in > 0); return (1); } /* * Finish off an encoded strip by flushing the last * string and tacking on an End Of Information code. */ static int PixarLogPostEncode(TIFF* tif) { PixarLogState *sp = EncoderState(tif); static const char module[] = "PixarLogPostEncode"; int state; sp->stream.avail_in = 0; do { state = deflate(&sp->stream, Z_FINISH); switch (state) { case Z_STREAM_END: case Z_OK: if (sp->stream.avail_out != (uint32)tif->tif_rawdatasize) { tif->tif_rawcc = tif->tif_rawdatasize - sp->stream.avail_out; TIFFFlushData1(tif); sp->stream.next_out = tif->tif_rawdata; sp->stream.avail_out = tif->tif_rawdatasize; } break; default: TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s", tif->tif_name, sp->stream.msg); return (0); } } while (state != Z_STREAM_END); return (1); } static void PixarLogClose(TIFF* tif) { TIFFDirectory *td = &tif->tif_dir; /* In a really sneaky maneuver, on close, we covertly modify both * bitspersample and sampleformat in the directory to indicate * 8-bit linear. This way, the decode "just works" even for * readers that don't know about PixarLog, or how to set * the PIXARLOGDATFMT pseudo-tag. */ td->td_bitspersample = 8; td->td_sampleformat = SAMPLEFORMAT_UINT; } static void PixarLogCleanup(TIFF* tif) { PixarLogState* sp = (PixarLogState*) tif->tif_data; assert(sp != 0); (void)TIFFPredictorCleanup(tif); tif->tif_tagmethods.vgetfield = sp->vgetparent; tif->tif_tagmethods.vsetfield = sp->vsetparent; if (sp->FromLT2) _TIFFfree(sp->FromLT2); if (sp->From14) _TIFFfree(sp->From14); if (sp->From8) _TIFFfree(sp->From8); if (sp->ToLinearF) _TIFFfree(sp->ToLinearF); if (sp->ToLinear16) _TIFFfree(sp->ToLinear16); if (sp->ToLinear8) _TIFFfree(sp->ToLinear8); if (sp->state&PLSTATE_INIT) { if (tif->tif_mode == O_RDONLY) inflateEnd(&sp->stream); else deflateEnd(&sp->stream); } if (sp->tbuf) _TIFFfree(sp->tbuf); _TIFFfree(sp); tif->tif_data = NULL; _TIFFSetDefaultCompressionState(tif); } static int PixarLogVSetField(TIFF* tif, ttag_t tag, va_list ap) { PixarLogState *sp = (PixarLogState *)tif->tif_data; int result; static const char module[] = "PixarLogVSetField"; switch (tag) { case TIFFTAG_PIXARLOGQUALITY: sp->quality = va_arg(ap, int); if (tif->tif_mode != O_RDONLY && (sp->state&PLSTATE_INIT)) { if (deflateParams(&sp->stream, sp->quality, Z_DEFAULT_STRATEGY) != Z_OK) { TIFFErrorExt(tif->tif_clientdata, module, "%s: zlib error: %s", tif->tif_name, sp->stream.msg); return (0); } } return (1); case TIFFTAG_PIXARLOGDATAFMT: sp->user_datafmt = va_arg(ap, int); /* Tweak the TIFF header so that the rest of libtiff knows what * size of data will be passed between app and library, and * assume that the app knows what it is doing and is not * confused by these header manipulations... */ switch (sp->user_datafmt) { case PIXARLOGDATAFMT_8BIT: case PIXARLOGDATAFMT_8BITABGR: TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8); TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT); break; case PIXARLOGDATAFMT_11BITLOG: TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16); TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT); break; case PIXARLOGDATAFMT_12BITPICIO: TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16); TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT); break; case PIXARLOGDATAFMT_16BIT: TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16); TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT); break; case PIXARLOGDATAFMT_FLOAT: TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 32); TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP); break; } /* * Must recalculate sizes should bits/sample change. */ tif->tif_tilesize = isTiled(tif) ? TIFFTileSize(tif) : (tsize_t) -1; tif->tif_scanlinesize = TIFFScanlineSize(tif); result = 1; /* NB: pseudo tag */ break; default: result = (*sp->vsetparent)(tif, tag, ap); } return (result); } static int PixarLogVGetField(TIFF* tif, ttag_t tag, va_list ap) { PixarLogState *sp = (PixarLogState *)tif->tif_data; switch (tag) { case TIFFTAG_PIXARLOGQUALITY: *va_arg(ap, int*) = sp->quality; break; case TIFFTAG_PIXARLOGDATAFMT: *va_arg(ap, int*) = sp->user_datafmt; break; default: return (*sp->vgetparent)(tif, tag, ap); } return (1); } static const TIFFFieldInfo pixarlogFieldInfo[] = { {TIFFTAG_PIXARLOGDATAFMT,0,0,TIFF_ANY, FIELD_PSEUDO,FALSE,FALSE,""}, {TIFFTAG_PIXARLOGQUALITY,0,0,TIFF_ANY, FIELD_PSEUDO,FALSE,FALSE,""} }; int TIFFInitPixarLog(TIFF* tif, int scheme) { static const char module[] = "TIFFInitPixarLog"; PixarLogState* sp; assert(scheme == COMPRESSION_PIXARLOG); /* * Merge codec-specific tag information. */ if (!_TIFFMergeFieldInfo(tif, pixarlogFieldInfo, TIFFArrayCount(pixarlogFieldInfo))) { TIFFErrorExt(tif->tif_clientdata, module, "Merging PixarLog codec-specific tags failed"); return 0; } /* * Allocate state block so tag methods have storage to record values. */ tif->tif_data = (tidata_t) _TIFFmalloc(sizeof (PixarLogState)); if (tif->tif_data == NULL) goto bad; sp = (PixarLogState*) tif->tif_data; _TIFFmemset(sp, 0, sizeof (*sp)); sp->stream.data_type = Z_BINARY; sp->user_datafmt = PIXARLOGDATAFMT_UNKNOWN; /* * Install codec methods. */ tif->tif_setupdecode = PixarLogSetupDecode; tif->tif_predecode = PixarLogPreDecode; tif->tif_decoderow = PixarLogDecode; tif->tif_decodestrip = PixarLogDecode; tif->tif_decodetile = PixarLogDecode; tif->tif_setupencode = PixarLogSetupEncode; tif->tif_preencode = PixarLogPreEncode; tif->tif_postencode = PixarLogPostEncode; tif->tif_encoderow = PixarLogEncode; tif->tif_encodestrip = PixarLogEncode; tif->tif_encodetile = PixarLogEncode; tif->tif_close = PixarLogClose; tif->tif_cleanup = PixarLogCleanup; /* Override SetField so we can handle our private pseudo-tag */ sp->vgetparent = tif->tif_tagmethods.vgetfield; tif->tif_tagmethods.vgetfield = PixarLogVGetField; /* hook for codec tags */ sp->vsetparent = tif->tif_tagmethods.vsetfield; tif->tif_tagmethods.vsetfield = PixarLogVSetField; /* hook for codec tags */ /* Default values for codec-specific fields */ sp->quality = Z_DEFAULT_COMPRESSION; /* default comp. level */ sp->state = 0; /* we don't wish to use the predictor, * the default is none, which predictor value 1 */ (void) TIFFPredictorInit(tif); /* * build the companding tables */ PixarLogMakeTables(sp); return (1); bad: TIFFErrorExt(tif->tif_clientdata, module, "No space for PixarLog state block"); return (0); } #endif /* PIXARLOG_SUPPORT */ /* vim: set ts=8 sts=8 sw=8 noet: */ /* * Local Variables: * mode: c * c-basic-offset: 8 * fill-column: 78 * End: */