Merge commit '638ecc4cde79b0296f2e04f683ca4cb881c28f36' as 'rtengine/libraw'
This commit is contained in:
Lawrence Lee
174
rtengine/libraw/samples/4channels.cpp
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174
rtengine/libraw/samples/4channels.cpp
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/* -*- C++ -*-
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* File: 4channels.cpp
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* Copyright 2008-2021 LibRaw LLC (info@libraw.org)
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* Created: Mon Feb 09, 2009
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*
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* LibRaw sample
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* Generates 4 TIFF file from RAW data, one file per channel
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*
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LibRaw is free software; you can redistribute it and/or modify
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it under the terms of the one of two licenses as you choose:
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1. GNU LESSER GENERAL PUBLIC LICENSE version 2.1
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(See file LICENSE.LGPL provided in LibRaw distribution archive for details).
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2. COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
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(See file LICENSE.CDDL provided in LibRaw distribution archive for details).
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*/
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include "libraw/libraw.h"
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#ifndef LIBRAW_WIN32_CALLS
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#include <netinet/in.h>
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#else
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#include <winsock2.h>
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#endif
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#ifdef LIBRAW_WIN32_CALLS
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#define snprintf _snprintf
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#endif
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int main(int ac, char *av[])
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{
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int i, ret;
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int autoscale = 0, black_subtraction = 1, use_gamma = 0;
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char outfn[1024];
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LibRaw RawProcessor;
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if (ac < 2)
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{
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usage:
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printf("4channels - LibRaw %s sample. %d cameras supported\n"
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"Usage: %s [-s N] [-g] [-A] [-B] [-N] raw-files....\n"
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"\t-s N - select Nth image in file (default=0)\n"
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"\t-g - use gamma correction with gamma 2.2 (not precise,use for "
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"visual inspection only)\n"
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"\t-A - autoscaling (by integer factor)\n"
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"\t-B - no black subtraction\n",
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LibRaw::version(), LibRaw::cameraCount(), av[0]);
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return 0;
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}
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#define P1 RawProcessor.imgdata.idata
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#define S RawProcessor.imgdata.sizes
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#define C RawProcessor.imgdata.color
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#define T RawProcessor.imgdata.thumbnail
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#define P2 RawProcessor.imgdata.other
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#define OUT RawProcessor.imgdata.params
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#define OUTR RawProcessor.imgdata.rawparams
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OUT.output_bps = 16;
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OUT.output_tiff = 1;
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OUT.user_flip = 0;
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OUT.no_auto_bright = 1;
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OUT.half_size = 1;
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for (i = 1; i < ac; i++)
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{
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if (av[i][0] == '-')
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{
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if (av[i][1] == 's' && av[i][2] == 0)
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{
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i++;
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OUTR.shot_select = av[i] ? atoi(av[i]) : 0;
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}
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else if (av[i][1] == 'g' && av[i][2] == 0)
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use_gamma = 1;
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else if (av[i][1] == 'A' && av[i][2] == 0)
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autoscale = 1;
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else if (av[i][1] == 'B' && av[i][2] == 0)
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{
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black_subtraction = 0;
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}
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else
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goto usage;
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continue;
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}
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if (!use_gamma)
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OUT.gamm[0] = OUT.gamm[1] = 1;
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int c;
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printf("Processing file %s\n", av[i]);
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if ((ret = RawProcessor.open_file(av[i])) != LIBRAW_SUCCESS)
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{
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fprintf(stderr, "Cannot open %s: %s\n", av[i], libraw_strerror(ret));
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continue; // no recycle b/c open file will recycle itself
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}
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if (P1.is_foveon)
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{
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printf("Cannot process Foveon image %s\n", av[i]);
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continue;
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}
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if ((ret = RawProcessor.unpack()) != LIBRAW_SUCCESS)
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{
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fprintf(stderr, "Cannot unpack %s: %s\n", av[i], libraw_strerror(ret));
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continue;
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}
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RawProcessor.raw2image();
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if (black_subtraction)
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{
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RawProcessor.subtract_black();
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}
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if (autoscale)
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{
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unsigned max = 0, scale = 1;
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for (int j = 0; j < S.iheight * S.iwidth; j++)
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for (int c = 0; c < 4; c++)
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if (max < RawProcessor.imgdata.image[j][c])
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max = RawProcessor.imgdata.image[j][c];
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if (max > 0 && max < 1 << 15)
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{
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scale = (1 << 16) / max;
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printf("Scaling with multiplier=%d (max=%d)\n", scale, max);
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for (int j = 0; j < S.iheight * S.iwidth; j++)
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for (c = 0; c < 4; c++)
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RawProcessor.imgdata.image[j][c] *= scale;
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}
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printf("Black level (scaled)=%d\n", C.black * scale);
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}
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else
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printf("Black level (unscaled)=%d\n", C.black);
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// hack to make dcraw tiff writer happy
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int isrgb = (P1.colors == 4 ? 0 : 1);
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P1.colors = 1;
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S.width = S.iwidth;
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S.height = S.iheight;
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for (int layer = 0; layer < 4; layer++)
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{
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if (layer > 0)
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{
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for (int rc = 0; rc < S.iheight * S.iwidth; rc++)
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RawProcessor.imgdata.image[rc][0] =
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RawProcessor.imgdata.image[rc][layer];
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}
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char lname[8];
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if (isrgb)
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{
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snprintf(lname, 7, "%c", ((char *)("RGBG"))[layer]);
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if (layer == 3)
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strcat(lname, "2");
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}
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else
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snprintf(lname, 7, "%c", ((char *)("GCMY"))[layer]);
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if (OUTR.shot_select)
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snprintf(outfn, sizeof(outfn), "%s-%d.%s.tiff", av[i], OUTR.shot_select,
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lname);
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else
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snprintf(outfn, sizeof(outfn), "%s.%s.tiff", av[i], lname);
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printf("Writing file %s\n", outfn);
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if (LIBRAW_SUCCESS != (ret = RawProcessor.dcraw_ppm_tiff_writer(outfn)))
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fprintf(stderr, "Cannot write %s: %s\n", outfn, libraw_strerror(ret));
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}
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}
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return 0;
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}
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