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-rw-r--r--tiff/tools/rgb2ycbcr.c382
1 files changed, 0 insertions, 382 deletions
diff --git a/tiff/tools/rgb2ycbcr.c b/tiff/tools/rgb2ycbcr.c
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index 0b30b51..0000000
--- a/tiff/tools/rgb2ycbcr.c
+++ /dev/null
@@ -1,382 +0,0 @@
-/* $Id: rgb2ycbcr.c,v 1.9.2.2 2010-06-08 18:50:44 bfriesen Exp $ */
-
-/*
- * Copyright (c) 1991-1997 Sam Leffler
- * Copyright (c) 1991-1997 Silicon Graphics, Inc.
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Sam Leffler and Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
-
-#include "tif_config.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#include "tiffiop.h"
-#include "tiffio.h"
-
-#define streq(a,b) (strcmp(a,b) == 0)
-#define CopyField(tag, v) \
- if (TIFFGetField(in, tag, &v)) TIFFSetField(out, tag, v)
-
-#ifndef howmany
-#define howmany(x, y) (((x)+((y)-1))/(y))
-#endif
-#define roundup(x, y) (howmany(x,y)*((uint32)(y)))
-
-#define LumaRed ycbcrCoeffs[0]
-#define LumaGreen ycbcrCoeffs[1]
-#define LumaBlue ycbcrCoeffs[2]
-
-uint16 compression = COMPRESSION_PACKBITS;
-uint32 rowsperstrip = (uint32) -1;
-
-uint16 horizSubSampling = 2; /* YCbCr horizontal subsampling */
-uint16 vertSubSampling = 2; /* YCbCr vertical subsampling */
-float ycbcrCoeffs[3] = { .299F, .587F, .114F };
-/* default coding range is CCIR Rec 601-1 with no headroom/footroom */
-float refBlackWhite[6] = { 0.F, 255.F, 128.F, 255.F, 128.F, 255.F };
-
-static int tiffcvt(TIFF* in, TIFF* out);
-static void usage(int code);
-static void setupLumaTables(void);
-
-int
-main(int argc, char* argv[])
-{
- TIFF *in, *out;
- int c;
- extern int optind;
- extern char *optarg;
-
- while ((c = getopt(argc, argv, "c:h:r:v:z")) != -1)
- switch (c) {
- case 'c':
- if (streq(optarg, "none"))
- compression = COMPRESSION_NONE;
- else if (streq(optarg, "packbits"))
- compression = COMPRESSION_PACKBITS;
- else if (streq(optarg, "lzw"))
- compression = COMPRESSION_LZW;
- else if (streq(optarg, "jpeg"))
- compression = COMPRESSION_JPEG;
- else if (streq(optarg, "zip"))
- compression = COMPRESSION_ADOBE_DEFLATE;
- else
- usage(-1);
- break;
- case 'h':
- horizSubSampling = atoi(optarg);
- break;
- case 'v':
- vertSubSampling = atoi(optarg);
- break;
- case 'r':
- rowsperstrip = atoi(optarg);
- break;
- case 'z': /* CCIR Rec 601-1 w/ headroom/footroom */
- refBlackWhite[0] = 16.;
- refBlackWhite[1] = 235.;
- refBlackWhite[2] = 128.;
- refBlackWhite[3] = 240.;
- refBlackWhite[4] = 128.;
- refBlackWhite[5] = 240.;
- break;
- case '?':
- usage(0);
- /*NOTREACHED*/
- }
- if (argc - optind < 2)
- usage(-1);
- out = TIFFOpen(argv[argc-1], "w");
- if (out == NULL)
- return (-2);
- setupLumaTables();
- for (; optind < argc-1; optind++) {
- in = TIFFOpen(argv[optind], "r");
- if (in != NULL) {
- do {
- if (!tiffcvt(in, out) ||
- !TIFFWriteDirectory(out)) {
- (void) TIFFClose(out);
- return (1);
- }
- } while (TIFFReadDirectory(in));
- (void) TIFFClose(in);
- }
- }
- (void) TIFFClose(out);
- return (0);
-}
-
-float *lumaRed;
-float *lumaGreen;
-float *lumaBlue;
-float D1, D2;
-int Yzero;
-
-static float*
-setupLuma(float c)
-{
- float *v = (float *)_TIFFmalloc(256 * sizeof (float));
- int i;
- for (i = 0; i < 256; i++)
- v[i] = c * i;
- return (v);
-}
-
-static unsigned
-V2Code(float f, float RB, float RW, int CR)
-{
- unsigned int c = (unsigned int)((((f)*(RW-RB)/CR)+RB)+.5);
- return (c > 255 ? 255 : c);
-}
-
-static void
-setupLumaTables(void)
-{
- lumaRed = setupLuma(LumaRed);
- lumaGreen = setupLuma(LumaGreen);
- lumaBlue = setupLuma(LumaBlue);
- D1 = 1.F/(2.F - 2.F*LumaBlue);
- D2 = 1.F/(2.F - 2.F*LumaRed);
- Yzero = V2Code(0, refBlackWhite[0], refBlackWhite[1], 255);
-}
-
-static void
-cvtClump(unsigned char* op, uint32* raster, uint32 ch, uint32 cw, uint32 w)
-{
- float Y, Cb = 0, Cr = 0;
- uint32 j, k;
- /*
- * Convert ch-by-cw block of RGB
- * to YCbCr and sample accordingly.
- */
- for (k = 0; k < ch; k++) {
- for (j = 0; j < cw; j++) {
- uint32 RGB = (raster - k*w)[j];
- Y = lumaRed[TIFFGetR(RGB)] +
- lumaGreen[TIFFGetG(RGB)] +
- lumaBlue[TIFFGetB(RGB)];
- /* accumulate chrominance */
- Cb += (TIFFGetB(RGB) - Y) * D1;
- Cr += (TIFFGetR(RGB) - Y) * D2;
- /* emit luminence */
- *op++ = V2Code(Y,
- refBlackWhite[0], refBlackWhite[1], 255);
- }
- for (; j < horizSubSampling; j++)
- *op++ = Yzero;
- }
- for (; k < vertSubSampling; k++) {
- for (j = 0; j < horizSubSampling; j++)
- *op++ = Yzero;
- }
- /* emit sampled chrominance values */
- *op++ = V2Code(Cb / (ch*cw), refBlackWhite[2], refBlackWhite[3], 127);
- *op++ = V2Code(Cr / (ch*cw), refBlackWhite[4], refBlackWhite[5], 127);
-}
-#undef LumaRed
-#undef LumaGreen
-#undef LumaBlue
-#undef V2Code
-
-/*
- * Convert a strip of RGB data to YCbCr and
- * sample to generate the output data.
- */
-static void
-cvtStrip(unsigned char* op, uint32* raster, uint32 nrows, uint32 width)
-{
- uint32 x;
- int clumpSize = vertSubSampling * horizSubSampling + 2;
- uint32 *tp;
-
- for (; nrows >= vertSubSampling; nrows -= vertSubSampling) {
- tp = raster;
- for (x = width; x >= horizSubSampling; x -= horizSubSampling) {
- cvtClump(op, tp,
- vertSubSampling, horizSubSampling, width);
- op += clumpSize;
- tp += horizSubSampling;
- }
- if (x > 0) {
- cvtClump(op, tp, vertSubSampling, x, width);
- op += clumpSize;
- }
- raster -= vertSubSampling*width;
- }
- if (nrows > 0) {
- tp = raster;
- for (x = width; x >= horizSubSampling; x -= horizSubSampling) {
- cvtClump(op, tp, nrows, horizSubSampling, width);
- op += clumpSize;
- tp += horizSubSampling;
- }
- if (x > 0)
- cvtClump(op, tp, nrows, x, width);
- }
-}
-
-static int
-cvtRaster(TIFF* tif, uint32* raster, uint32 width, uint32 height)
-{
- uint32 y;
- tstrip_t strip = 0;
- tsize_t cc, acc;
- unsigned char* buf;
- uint32 rwidth = roundup(width, horizSubSampling);
- uint32 rheight = roundup(height, vertSubSampling);
- uint32 nrows = (rowsperstrip > rheight ? rheight : rowsperstrip);
- uint32 rnrows = roundup(nrows,vertSubSampling);
-
- cc = rnrows*rwidth +
- 2*((rnrows*rwidth) / (horizSubSampling*vertSubSampling));
- buf = (unsigned char*)_TIFFmalloc(cc);
- for (y = height; (int32) y > 0; y -= nrows) {
- uint32 nr = (y > nrows ? nrows : y);
- cvtStrip(buf, raster + (y-1)*width, nr, width);
- nr = roundup(nr, vertSubSampling);
- acc = nr*rwidth +
- 2*((nr*rwidth)/(horizSubSampling*vertSubSampling));
- if (!TIFFWriteEncodedStrip(tif, strip++, buf, acc)) {
- _TIFFfree(buf);
- return (0);
- }
- }
- _TIFFfree(buf);
- return (1);
-}
-
-static int
-tiffcvt(TIFF* in, TIFF* out)
-{
- uint32 width, height; /* image width & height */
- uint32* raster; /* retrieve RGBA image */
- uint16 shortv;
- float floatv;
- char *stringv;
- uint32 longv;
-
- size_t pixel_count;
- TIFFGetField(in, TIFFTAG_IMAGEWIDTH, &width);
- TIFFGetField(in, TIFFTAG_IMAGELENGTH, &height);
- pixel_count = width * height;
-
- /* XXX: Check the integer overflow. */
- if (!width || !height || pixel_count / width != height) {
- TIFFError(TIFFFileName(in),
- "Malformed input file; "
- "can't allocate buffer for raster of %lux%lu size",
- (unsigned long)width, (unsigned long)height);
- return 0;
- }
-
- raster = (uint32*)_TIFFCheckMalloc(in, pixel_count, sizeof(uint32),
- "raster buffer");
- if (raster == 0) {
- TIFFError(TIFFFileName(in),
- "Requested buffer size is %lu elements %lu each",
- (unsigned long)pixel_count,
- (unsigned long)sizeof(uint32));
- return (0);
- }
-
- if (!TIFFReadRGBAImage(in, width, height, raster, 0)) {
- _TIFFfree(raster);
- return (0);
- }
-
- CopyField(TIFFTAG_SUBFILETYPE, longv);
- TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);
- TIFFSetField(out, TIFFTAG_IMAGELENGTH, height);
- TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
- TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
- TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_YCBCR);
- if (compression == COMPRESSION_JPEG)
- TIFFSetField(out, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RAW);
- CopyField(TIFFTAG_FILLORDER, shortv);
- TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
- TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 3);
- CopyField(TIFFTAG_XRESOLUTION, floatv);
- CopyField(TIFFTAG_YRESOLUTION, floatv);
- CopyField(TIFFTAG_RESOLUTIONUNIT, shortv);
- TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
- { char buf[2048];
- char *cp = strrchr(TIFFFileName(in), '/');
- sprintf(buf, "YCbCr conversion of %s", cp ? cp+1 : TIFFFileName(in));
- TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, buf);
- }
- TIFFSetField(out, TIFFTAG_SOFTWARE, TIFFGetVersion());
- CopyField(TIFFTAG_DOCUMENTNAME, stringv);
-
- TIFFSetField(out, TIFFTAG_REFERENCEBLACKWHITE, refBlackWhite);
- TIFFSetField(out, TIFFTAG_YCBCRSUBSAMPLING,
- horizSubSampling, vertSubSampling);
- TIFFSetField(out, TIFFTAG_YCBCRPOSITIONING, YCBCRPOSITION_CENTERED);
- TIFFSetField(out, TIFFTAG_YCBCRCOEFFICIENTS, ycbcrCoeffs);
- rowsperstrip = TIFFDefaultStripSize(out, rowsperstrip);
- TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, rowsperstrip);
-
- return (cvtRaster(out, raster, width, height));
-}
-
-char* stuff[] = {
- "usage: rgb2ycbcr [-c comp] [-r rows] [-h N] [-v N] input... output\n",
- "where comp is one of the following compression algorithms:\n",
- " jpeg\t\tJPEG encoding\n",
- " lzw\t\tLempel-Ziv & Welch encoding\n",
- " zip\t\tdeflate encoding\n",
- " packbits\tPackBits encoding (default)\n",
- " none\t\tno compression\n",
- "and the other options are:\n",
- " -r\trows/strip\n",
- " -h\thorizontal sampling factor (1,2,4)\n",
- " -v\tvertical sampling factor (1,2,4)\n",
- NULL
-};
-
-static void
-usage(int code)
-{
- char buf[BUFSIZ];
- int i;
-
- setbuf(stderr, buf);
-
- fprintf(stderr, "%s\n\n", TIFFGetVersion());
- for (i = 0; stuff[i] != NULL; i++)
- fprintf(stderr, "%s\n", stuff[i]);
- exit(code);
-}
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 8
- * fill-column: 78
- * End:
- */
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