src/tiff/tools/rgb2ycbcr.c

   1 /* $Id$ */
   2
   3 /*
   4  * Copyright (c) 1991-1997 Sam Leffler
   5  * Copyright (c) 1991-1997 Silicon Graphics, Inc.
   6  *
   7  * Permission to use, copy, modify, distribute, and sell this software and
   8  * its documentation for any purpose is hereby granted without fee, provided
   9  * that (i) the above copyright notices and this permission notice appear in
  10  * all copies of the software and related documentation, and (ii) the names of
  11  * Sam Leffler and Silicon Graphics may not be used in any advertising or
  12  * publicity relating to the software without the specific, prior written
  13  * permission of Sam Leffler and Silicon Graphics.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
  17  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  18  *
  19  * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
  20  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
  21  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  22  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
  23  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  */
  26
  27 #include "tif_config.h"
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdlib.h>
  32
  33 #ifdef HAVE_UNISTD_H
  34 # include <unistd.h>
  35 #endif
  36
  37 #ifdef NEED_LIBPORT
  38 # include "libport.h"
  39 #endif
  40
  41 #include "tiffiop.h"
  42 #include "tiffio.h"
  43
  44 #define streq(a,b)      (strcmp(a,b) == 0)
  45 #define CopyField(tag, v) \
  46     if (TIFFGetField(in, tag, &v)) TIFFSetField(out, tag, v)
  47
  48 #ifndef howmany
  49 #define howmany(x, y)   (((x)+((y)-1))/(y))
  50 #endif
  51 #define roundup(x, y)   (howmany(x,y)*((uint32)(y)))
  52
  53 #define LumaRed         ycbcrCoeffs[0]
  54 #define LumaGreen       ycbcrCoeffs[1]
  55 #define LumaBlue        ycbcrCoeffs[2]
  56
  57 uint16  compression = COMPRESSION_PACKBITS;
  58 uint32  rowsperstrip = (uint32) -1;
  59
  60 uint16  horizSubSampling = 2;           /* YCbCr horizontal subsampling */
  61 uint16  vertSubSampling = 2;            /* YCbCr vertical subsampling */
  62 float   ycbcrCoeffs[3] = { .299F, .587F, .114F };
  63 /* default coding range is CCIR Rec 601-1 with no headroom/footroom */
  64 float   refBlackWhite[6] = { 0.F, 255.F, 128.F, 255.F, 128.F, 255.F };
  65
  66 static  int tiffcvt(TIFF* in, TIFF* out);
  67 static  void usage(int code);
  68 static  void setupLumaTables(void);
  69
  70 int
  71 main(int argc, char* argv[])
  72 {
  73         TIFF *in, *out;
  74         int c;
  75         extern int optind;
  76         extern char *optarg;
  77
  78         while ((c = getopt(argc, argv, "c:h:r:v:z")) != -1)
  79                 switch (c) {
  80                 case 'c':
  81                         if (streq(optarg, "none"))
  82                             compression = COMPRESSION_NONE;
  83                         else if (streq(optarg, "packbits"))
  84                             compression = COMPRESSION_PACKBITS;
  85                         else if (streq(optarg, "lzw"))
  86                             compression = COMPRESSION_LZW;
  87                         else if (streq(optarg, "jpeg"))
  88                             compression = COMPRESSION_JPEG;
  89                         else if (streq(optarg, "zip"))
  90                             compression = COMPRESSION_ADOBE_DEFLATE;
  91                         else
  92                             usage(-1);
  93                         break;
  94                 case 'h':
  95                         horizSubSampling = atoi(optarg);
  96                         break;
  97                 case 'v':
  98                         vertSubSampling = atoi(optarg);
  99                         break;
 100                 case 'r':
 101                         rowsperstrip = atoi(optarg);
 102                         break;
 103                 case 'z':       /* CCIR Rec 601-1 w/ headroom/footroom */
 104                         refBlackWhite[0] = 16.;
 105                         refBlackWhite[1] = 235.;
 106                         refBlackWhite[2] = 128.;
 107                         refBlackWhite[3] = 240.;
 108                         refBlackWhite[4] = 128.;
 109                         refBlackWhite[5] = 240.;
 110                         break;
 111                 case '?':
 112                         usage(0);
 113                         /*NOTREACHED*/
 114                 }
 115         if (argc - optind < 2)
 116                 usage(-1);
 117         out = TIFFOpen(argv[argc-1], "w");
 118         if (out == NULL)
 119                 return (-2);
 120         setupLumaTables();
 121         for (; optind < argc-1; optind++) {
 122                 in = TIFFOpen(argv[optind], "r");
 123                 if (in != NULL) {
 124                         do {
 125                                 if (!tiffcvt(in, out) ||
 126                                     !TIFFWriteDirectory(out)) {
 127                                         (void) TIFFClose(out);
 128                                         return (1);
 129                                 }
 130                         } while (TIFFReadDirectory(in));
 131                         (void) TIFFClose(in);
 132                 }
 133         }
 134         (void) TIFFClose(out);
 135         return (0);
 136 }
 137
 138 float   *lumaRed;
 139 float   *lumaGreen;
 140 float   *lumaBlue;
 141 float   D1, D2;
 142 int     Yzero;
 143
 144 static float*
 145 setupLuma(float c)
 146 {
 147         float *v = (float *)_TIFFmalloc(256 * sizeof (float));
 148         int i;
 149         for (i = 0; i < 256; i++)
 150                 v[i] = c * i;
 151         return (v);
 152 }
 153
 154 static unsigned
 155 V2Code(float f, float RB, float RW, int CR)
 156 {
 157         unsigned int c = (unsigned int)((((f)*(RW-RB)/CR)+RB)+.5);
 158         return (c > 255 ? 255 : c);
 159 }
 160
 161 static void
 162 setupLumaTables(void)
 163 {
 164         lumaRed = setupLuma(LumaRed);
 165         lumaGreen = setupLuma(LumaGreen);
 166         lumaBlue = setupLuma(LumaBlue);
 167         D1 = 1.F/(2.F - 2.F*LumaBlue);
 168         D2 = 1.F/(2.F - 2.F*LumaRed);
 169         Yzero = V2Code(0, refBlackWhite[0], refBlackWhite[1], 255);
 170 }
 171
 172 static void
 173 cvtClump(unsigned char* op, uint32* raster, uint32 ch, uint32 cw, uint32 w)
 174 {
 175         float Y, Cb = 0, Cr = 0;
 176         uint32 j, k;
 177         /*
 178          * Convert ch-by-cw block of RGB
 179          * to YCbCr and sample accordingly.
 180          */
 181         for (k = 0; k < ch; k++) {
 182                 for (j = 0; j < cw; j++) {
 183                         uint32 RGB = (raster - k*w)[j];
 184                         Y = lumaRed[TIFFGetR(RGB)] +
 185                             lumaGreen[TIFFGetG(RGB)] +
 186                             lumaBlue[TIFFGetB(RGB)];
 187                         /* accumulate chrominance */
 188                         Cb += (TIFFGetB(RGB) - Y) * D1;
 189                         Cr += (TIFFGetR(RGB) - Y) * D2;
 190                         /* emit luminence */
 191                         *op++ = V2Code(Y,
 192                             refBlackWhite[0], refBlackWhite[1], 255);
 193                 }
 194                 for (; j < horizSubSampling; j++)
 195                         *op++ = Yzero;
 196         }
 197         for (; k < vertSubSampling; k++) {
 198                 for (j = 0; j < horizSubSampling; j++)
 199                         *op++ = Yzero;
 200         }
 201         /* emit sampled chrominance values */
 202         *op++ = V2Code(Cb / (ch*cw), refBlackWhite[2], refBlackWhite[3], 127);
 203         *op++ = V2Code(Cr / (ch*cw), refBlackWhite[4], refBlackWhite[5], 127);
 204 }
 205 #undef LumaRed
 206 #undef LumaGreen
 207 #undef LumaBlue
 208 #undef V2Code
 209
 210 /*
 211  * Convert a strip of RGB data to YCbCr and
 212  * sample to generate the output data.
 213  */
 214 static void
 215 cvtStrip(unsigned char* op, uint32* raster, uint32 nrows, uint32 width)
 216 {
 217         uint32 x;
 218         int clumpSize = vertSubSampling * horizSubSampling + 2;
 219         uint32 *tp;
 220
 221         for (; nrows >= vertSubSampling; nrows -= vertSubSampling) {
 222                 tp = raster;
 223                 for (x = width; x >= horizSubSampling; x -= horizSubSampling) {
 224                         cvtClump(op, tp,
 225                             vertSubSampling, horizSubSampling, width);
 226                         op += clumpSize;
 227                         tp += horizSubSampling;
 228                 }
 229                 if (x > 0) {
 230                         cvtClump(op, tp, vertSubSampling, x, width);
 231                         op += clumpSize;
 232                 }
 233                 raster -= vertSubSampling*width;
 234         }
 235         if (nrows > 0) {
 236                 tp = raster;
 237                 for (x = width; x >= horizSubSampling; x -= horizSubSampling) {
 238                         cvtClump(op, tp, nrows, horizSubSampling, width);
 239                         op += clumpSize;
 240                         tp += horizSubSampling;
 241                 }
 242                 if (x > 0)
 243                         cvtClump(op, tp, nrows, x, width);
 244         }
 245 }
 246
 247 static int
 248 cvtRaster(TIFF* tif, uint32* raster, uint32 width, uint32 height)
 249 {
 250         uint32 y;
 251         tstrip_t strip = 0;
 252         tsize_t cc, acc;
 253         unsigned char* buf;
 254         uint32 rwidth = roundup(width, horizSubSampling);
 255         uint32 rheight = roundup(height, vertSubSampling);
 256         uint32 nrows = (rowsperstrip > rheight ? rheight : rowsperstrip);
 257         uint32 rnrows = roundup(nrows,vertSubSampling);
 258
 259         cc = rnrows*rwidth +
 260             2*((rnrows*rwidth) / (horizSubSampling*vertSubSampling));
 261         buf = (unsigned char*)_TIFFmalloc(cc);
 262         // FIXME unchecked malloc
 263         for (y = height; (int32) y > 0; y -= nrows) {
 264                 uint32 nr = (y > nrows ? nrows : y);
 265                 cvtStrip(buf, raster + (y-1)*width, nr, width);
 266                 nr = roundup(nr, vertSubSampling);
 267                 acc = nr*rwidth +
 268                         2*((nr*rwidth)/(horizSubSampling*vertSubSampling));
 269                 if (!TIFFWriteEncodedStrip(tif, strip++, buf, acc)) {
 270                         _TIFFfree(buf);
 271                         return (0);
 272                 }
 273         }
 274         _TIFFfree(buf);
 275         return (1);
 276 }
 277
 278 static int
 279 tiffcvt(TIFF* in, TIFF* out)
 280 {
 281         uint32 width, height;           /* image width & height */
 282         uint32* raster;                 /* retrieve RGBA image */
 283         uint16 shortv;
 284         float floatv;
 285         char *stringv;
 286         uint32 longv;
 287         int result;
 288         size_t pixel_count;
 289
 290         TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width);
 291         TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height);
 292         pixel_count = width * height;
 293
 294         /* XXX: Check the integer overflow. */
 295         if (!width || !height || pixel_count / width != height) {
 296                 TIFFError(TIFFFileName(in),
 297                           "Malformed input file; "
 298                           "can't allocate buffer for raster of %lux%lu size",
 299                           (unsigned long)width, (unsigned long)height);
 300                 return 0;
 301         }
 302
 303         raster = (uint32*)_TIFFCheckMalloc(in, pixel_count, sizeof(uint32),
 304                                            "raster buffer");
 305         if (raster == 0) {
 306                 TIFFError(TIFFFileName(in),
 307                           "Failed to allocate buffer (%lu elements of %lu each)",
 308                           (unsigned long)pixel_count,
 309                           (unsigned long)sizeof(uint32));
 310                 return (0);
 311         }
 312
 313         if (!TIFFReadRGBAImage(in, width, height, raster, 0)) {
 314                 _TIFFfree(raster);
 315                 return (0);
 316         }
 317
 318         CopyField(TIFFTAG_SUBFILETYPE, longv);
 319         TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);
 320         TIFFSetField(out, TIFFTAG_IMAGELENGTH, height);
 321         TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
 322         TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
 323         TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_YCBCR);
 324         if (compression == COMPRESSION_JPEG)
 325                 TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RAW);
 326         CopyField(TIFFTAG_FILLORDER, shortv);
 327         TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
 328         TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 3);
 329         CopyField(TIFFTAG_XRESOLUTION, floatv);
 330         CopyField(TIFFTAG_YRESOLUTION, floatv);
 331         CopyField(TIFFTAG_RESOLUTIONUNIT, shortv);
 332         TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
 333         { char buf[2048];
 334           char *cp = strrchr(TIFFFileName(in), '/');
 335           sprintf(buf, "YCbCr conversion of %s", cp ? cp+1 : TIFFFileName(in));
 336           TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, buf);
 337         }
 338         TIFFSetField(out, TIFFTAG_SOFTWARE, TIFFGetVersion());
 339         CopyField(TIFFTAG_DOCUMENTNAME, stringv);
 340
 341         TIFFSetField(out, TIFFTAG_REFERENCEBLACKWHITE, refBlackWhite);
 342         TIFFSetField(out, TIFFTAG_YCBCRSUBSAMPLING,
 343             horizSubSampling, vertSubSampling);
 344         TIFFSetField(out, TIFFTAG_YCBCRPOSITIONING, YCBCRPOSITION_CENTERED);
 345         TIFFSetField(out, TIFFTAG_YCBCRCOEFFICIENTS, ycbcrCoeffs);
 346         rowsperstrip = TIFFDefaultStripSize(out, rowsperstrip);
 347         TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, rowsperstrip);
 348
 349         result = cvtRaster(out, raster, width, height);
 350         _TIFFfree(raster);
 351         return result;
 352 }
 353
 354 char* stuff[] = {
 355     "usage: rgb2ycbcr [-c comp] [-r rows] [-h N] [-v N] input... output\n",
 356     "where comp is one of the following compression algorithms:\n",
 357     " jpeg\t\tJPEG encoding\n",
 358     " lzw\t\tLempel-Ziv & Welch encoding\n",
 359     " zip\t\tdeflate encoding\n",
 360     " packbits\tPackBits encoding (default)\n",
 361     " none\t\tno compression\n",
 362     "and the other options are:\n",
 363     " -r\trows/strip\n",
 364     " -h\thorizontal sampling factor (1,2,4)\n",
 365     " -v\tvertical sampling factor (1,2,4)\n",
 366     NULL
 367 };
 368
 369 static void
 370 usage(int code)
 371 {
 372         char buf[BUFSIZ];
 373         int i;
 374
 375         setbuf(stderr, buf);
 376
 377  fprintf(stderr, "%s\n\n", TIFFGetVersion());
 378         for (i = 0; stuff[i] != NULL; i++)
 379                 fprintf(stderr, "%s\n", stuff[i]);
 380         exit(code);
 381 }
 382
 383 /* vim: set ts=8 sts=8 sw=8 noet: */
 384 /*
 385  * Local Variables:
 386  * mode: c
 387  * c-basic-offset: 8
 388  * fill-column: 78
 389  * End:
 390  */