/* -*- C++ -*-
 * File: dcraw_emu.cpp
 * Copyright 2008-2019 LibRaw LLC (info@libraw.org)
 * Created: Sun Mar 23,   2008
 *
 * LibRaw simple C++ API sample: almost complete dcraw emulator
 *

LibRaw is free software; you can redistribute it and/or modify
it under the terms of the one of two licenses as you choose:

1. GNU LESSER GENERAL PUBLIC LICENSE version 2.1
   (See file LICENSE.LGPL provided in LibRaw distribution archive for details).

2. COMMON DEVELOPMENT AND DISTRIBUTION LICENSE (CDDL) Version 1.0
   (See file LICENSE.CDDL provided in LibRaw distribution archive for details).


 */
#ifdef WIN32
// suppress sprintf-related warning. sprintf() is permitted in sample code
#define _CRT_SECURE_NO_WARNINGS
#endif

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <ctype.h>
#ifndef WIN32
#include <sys/mman.h>
#include <sys/time.h>
#include <unistd.h>
#else
#include <io.h>
#endif
#include <fcntl.h>
#include <sys/stat.h>

#include "libraw/libraw.h"
#ifdef WIN32
#define snprintf _snprintf
#include <windows.h>
#else
#define O_BINARY 0
#endif

#ifdef USE_DNGSDK
#include "dng_host.h"
#include "dng_negative.h"
#include "dng_simple_image.h"
#include "dng_info.h"
#endif

void usage(const char *prog)
{
  printf("dcraw_emu: almost complete dcraw emulator\n");
  printf("Usage:  %s [OPTION]... [FILE]...\n", prog);
  printf("-c float-num       Set adjust maximum threshold (default 0.75)\n"
         "-v        Verbose: print progress messages (repeated -v will add verbosity)\n"
         "-w        Use camera white balance, if possible\n"
         "-a        Average the whole image for white balance\n"
         "-A <x y w h> Average a grey box for white balance\n"
         "-r <r g b g> Set custom white balance\n"
         "+M/-M     Use/don't use an embedded color matrix\n"
         "-C <r b>  Correct chromatic aberration\n"
         "-P <file> Fix the dead pixels listed in this file\n"
         "-K <file> Subtract dark frame (16-bit raw PGM)\n"
         "-k <num>  Set the darkness level\n"
         "-S <num>  Set the saturation level\n"
         "-R <num>  Set raw processing options to num\n"
         "-n <num>  Set threshold for wavelet denoising\n"
         "-H [0-9]  Highlight mode (0=clip, 1=unclip, 2=blend, 3+=rebuild)\n"
         "-t [0-7]  Flip image (0=none, 3=180, 5=90CCW, 6=90CW)\n"
         "-o [0-6]  Output colorspace (raw,sRGB,Adobe,Wide,ProPhoto,XYZ,ACES)\n"
#ifndef NO_LCMS
         "-o file   Output ICC profile\n"
         "-p file   Camera input profile (use \'embed\' for embedded profile)\n"
#endif
         "-j        Don't stretch or rotate raw pixels\n"
         "-W        Don't automatically brighten the image\n"
         "-b <num>  Adjust brightness (default = 1.0)\n"
         "-q N      Set the interpolation quality:\n"
         "          0 - linear, 1 - VNG, 2 - PPG, 3 - AHD, 4 - DCB\n"
         "          11 - DHT, 12 - AAHD\n"
         "-h        Half-size color image (twice as fast as \"-q 0\")\n"
         "-f        Interpolate RGGB as four colors\n"
         "-m <num>  Apply a 3x3 median filter to R-G and B-G\n"
         "-s [0..N-1] Select one raw image from input file\n"
         "-4        Linear 16-bit, same as \"-6 -W -g 1 1\n"
         "-6        Write 16-bit linear instead of 8-bit with gamma\n"
         "-g pow ts Set gamma curve to gamma pow and toe slope ts (default = 2.222 4.5)\n"
         "-T        Write TIFF instead of PPM\n"
         "-G        Use green_matching() filter\n"
         "-B <x y w h> use cropbox\n"
         "-F        Use FILE I/O instead of streambuf API\n"
         "-timing   Detailed timing report\n"
         "-fbdd N   0 - disable FBDD noise reduction (default), 1 - light FBDD, 2 - full\n"
         "-dcbi N   Number of extra DCD iterations (default - 0)\n"
         "-dcbe     DCB color enhance\n"
         "-aexpo <e p> exposure correction\n"
         "-apentax4shot enables merge of 4-shot pentax files\n"
         "-apentax4shotorder 3102 sets pentax 4-shot alignment order\n"
#ifndef WIN32
         "-mmap     Use mmap()-ed buffer instead of plain FILE I/O\n"
#endif
         "-mem	   Use memory buffer instead of FILE I/O\n"
         "-disars   Do not use RawSpeed library\n"
         "-disinterp Do not run interpolation step\n"
         "-dsrawrgb1 Disable YCbCr to RGB conversion for sRAW (Cb/Cr interpolation enabled)\n"
         "-dsrawrgb2 Disable YCbCr to RGB conversion for sRAW (Cb/Cr interpolation disabled)\n"
#ifdef USE_DNGSDK
         "-dngsdk   Use Adobe DNG SDK for DNG decode\n"
         "-dngflags N set DNG decoding options to value N\n"
#endif
  );
  exit(1);
}

static int verbosity = 0;
int cnt = 0;
int my_progress_callback(void *d, enum LibRaw_progress p, int iteration, int expected)
{
  char *passed = (char *)(d ? d : "default string"); // data passed to callback at set_callback stage

  if (verbosity > 2) // verbosity set by repeat -v switches
  {
    printf("CB: %s  pass %d of %d (data passed=%s)\n", libraw_strprogress(p), iteration, expected, passed);
  }
  else if (iteration == 0) // 1st iteration of each step
    printf("Starting %s (expecting %d iterations)\n", libraw_strprogress(p), expected);
  else if (iteration == expected - 1)
    printf("%s finished\n", libraw_strprogress(p));

  ///    if(++cnt>10) return 1; // emulate user termination on 10-th callback call

  return 0; // always return 0 to continue processing
}

// timer
#ifndef WIN32
static struct timeval start, end;
void timerstart(void) { gettimeofday(&start, NULL); }
void timerprint(const char *msg, const char *filename)
{
  gettimeofday(&end, NULL);
  float msec = (end.tv_sec - start.tv_sec) * 1000.0f + (end.tv_usec - start.tv_usec) / 1000.0f;
  printf("Timing: %s/%s: %6.3f msec\n", filename, msg, msec);
}
#else
LARGE_INTEGER start;
void timerstart(void) { QueryPerformanceCounter(&start); }
void timerprint(const char *msg, const char *filename)
{
  LARGE_INTEGER unit, end;
  QueryPerformanceCounter(&end);
  QueryPerformanceFrequency(&unit);
  float msec = (float)(end.QuadPart - start.QuadPart);
  msec /= (float)unit.QuadPart / 1000.0f;
  printf("Timing: %s/%s: %6.3f msec\n", filename, msg, msec);
}

#endif

int main(int argc, char *argv[])
{
  if (argc == 1)
    usage(argv[0]);

  LibRaw RawProcessor;
  int i, arg, c, ret;
  char opm, opt, *cp, *sp;
  int use_bigfile = 0, use_timing = 0, use_mem = 0;
#ifdef USE_DNGSDK
  dng_host *dnghost = NULL;
#endif
#ifndef WIN32
  int msize = 0, use_mmap = 0;

#endif
  void *iobuffer = 0;
#ifdef OUT
#undef OUT
#endif

#define OUT RawProcessor.imgdata.params

  argv[argc] = (char *)"";
  for (arg = 1; (((opm = argv[arg][0]) - 2) | 2) == '+';)
  {
    char *optstr = argv[arg];
    opt = argv[arg++][1];
    if ((cp = strchr(sp = (char *)"cnbrkStqmHABCgU", opt)) != 0)
      for (i = 0; i < "111411111144221"[cp - sp] - '0'; i++)
        if (!isdigit(argv[arg + i][0]) && !optstr[2])
        {
          fprintf(stderr, "Non-numeric argument to \"-%c\"\n", opt);
          return 1;
        }
    if (!strchr("ftdeam", opt) && argv[arg - 1][2])
      fprintf(stderr, "Unknown option \"%s\".\n", argv[arg - 1]);
    switch (opt)
    {
    case 'v':
      verbosity++;
      break;
    case 'G':
      OUT.green_matching = 1;
      break;
    case 'c':
      OUT.adjust_maximum_thr = (float)atof(argv[arg++]);
      break;
    case 'U':
      OUT.auto_bright_thr = (float)atof(argv[arg++]);
      break;
    case 'n':
      OUT.threshold = (float)atof(argv[arg++]);
      break;
    case 'b':
      OUT.bright = (float)atof(argv[arg++]);
      break;
    case 'P':
      OUT.bad_pixels = argv[arg++];
      break;
    case 'K':
      OUT.dark_frame = argv[arg++];
      break;
    case 'r':
      for (c = 0; c < 4; c++)
        OUT.user_mul[c] = (float)atof(argv[arg++]);
      break;
    case 'C':
      OUT.aber[0] = 1 / atof(argv[arg++]);
      OUT.aber[2] = 1 / atof(argv[arg++]);
      break;
    case 'g':
      OUT.gamm[0] = 1 / atof(argv[arg++]);
      OUT.gamm[1] = atof(argv[arg++]);
      break;
    case 'k':
      OUT.user_black = atoi(argv[arg++]);
      break;
    case 'S':
      OUT.user_sat = atoi(argv[arg++]);
      break;
    case 'R':
      OUT.raw_processing_options = atoi(argv[arg++]);
      break;
    case 't':
      if (!strcmp(optstr, "-timing"))
        use_timing = 1;
      else if (!argv[arg - 1][2])
        OUT.user_flip = atoi(argv[arg++]);
      else
        fprintf(stderr, "Unknown option \"%s\".\n", argv[arg - 1]);
      break;
    case 'q':
      OUT.user_qual = atoi(argv[arg++]);
      break;
    case 'm':
#ifndef WIN32
      if (!strcmp(optstr, "-mmap"))
        use_mmap = 1;
      else
#endif
          if (!strcmp(optstr, "-mem"))
        use_mem = 1;
      else
      {
        if (!argv[arg - 1][2])
          OUT.med_passes = atoi(argv[arg++]);
        else
          fprintf(stderr, "Unknown option \"%s\".\n", argv[arg - 1]);
      }
      break;
    case 'H':
      OUT.highlight = atoi(argv[arg++]);
      break;
    case 's':
      OUT.shot_select = abs(atoi(argv[arg++]));
      break;
    case 'o':
      if (isdigit(argv[arg][0]) && !isdigit(argv[arg][1]))
        OUT.output_color = atoi(argv[arg++]);
#ifndef NO_LCMS
      else
        OUT.output_profile = argv[arg++];
      break;
    case 'p':
      OUT.camera_profile = argv[arg++];
#endif
      break;
    case 'h':
      OUT.half_size = 1;
      break;
    case 'f':
      if (!strcmp(optstr, "-fbdd"))
        OUT.fbdd_noiserd = atoi(argv[arg++]);
      else
      {
        if (!argv[arg - 1][2])
          OUT.four_color_rgb = 1;
        else
          fprintf(stderr, "Unknown option \"%s\".\n", argv[arg - 1]);
      }
      break;
    case 'A':
      for (c = 0; c < 4; c++)
        OUT.greybox[c] = atoi(argv[arg++]);
      break;
    case 'B':
      for (c = 0; c < 4; c++)
        OUT.cropbox[c] = atoi(argv[arg++]);
      break;
    case 'a':
      if (!strcmp(optstr, "-aexpo"))
      {
        OUT.exp_correc = 1;
        OUT.exp_shift = (float)atof(argv[arg++]);
        OUT.exp_preser = (float)atof(argv[arg++]);
      }
      else if (!strcmp(optstr, "-apentax4shot"))
      {
        OUT.raw_processing_options |= LIBRAW_PROCESSING_PENTAX_PS_ALLFRAMES;
      }
      else if (!strcmp(optstr, "-apentax4shotorder"))
      {
        strncpy(OUT.p4shot_order, argv[arg++], 5);
      }
      else if (!argv[arg - 1][2])
        OUT.use_auto_wb = 1;
      else
        fprintf(stderr, "Unknown option \"%s\".\n", argv[arg - 1]);
      break;
    case 'w':
      OUT.use_camera_wb = 1;
      break;
    case 'M':
      OUT.use_camera_matrix = (opm == '+');
      break;
    case 'j':
      OUT.use_fuji_rotate = 0;
      break;
    case 'W':
      OUT.no_auto_bright = 1;
      break;
    case 'T':
      OUT.output_tiff = 1;
      break;
    case '4':
      OUT.gamm[0] = OUT.gamm[1] = OUT.no_auto_bright = 1; /* no break here! */
    case '6':
      OUT.output_bps = 16;
      break;
    case 'F':
      use_bigfile = 1;
      break;
    case 'd':
      if (!strcmp(optstr, "-dcbi"))
        OUT.dcb_iterations = atoi(argv[arg++]);
      else if (!strcmp(optstr, "-disars"))
        OUT.use_rawspeed = 0;
      else if (!strcmp(optstr, "-disinterp"))
        OUT.no_interpolation = 1;
      else if (!strcmp(optstr, "-dcbe"))
        OUT.dcb_enhance_fl = 1;
      else if (!strcmp(optstr, "-dsrawrgb1"))
      {
        OUT.raw_processing_options |= LIBRAW_PROCESSING_SRAW_NO_RGB;
        OUT.raw_processing_options &= ~LIBRAW_PROCESSING_SRAW_NO_INTERPOLATE;
      }
      else if (!strcmp(optstr, "-dsrawrgb2"))
      {
        OUT.raw_processing_options &= ~LIBRAW_PROCESSING_SRAW_NO_RGB;
        OUT.raw_processing_options |= LIBRAW_PROCESSING_SRAW_NO_INTERPOLATE;
      }
#ifdef USE_DNGSDK
      else if (!strcmp(optstr, "-dngsdk"))
      {
        dnghost = new dng_host;
        RawProcessor.set_dng_host(dnghost);
      }
      else if (!strcmp(optstr, "-dngflags"))
      {
        OUT.use_dngsdk = atoi(argv[arg++]);
      }
#endif
      else
        fprintf(stderr, "Unknown option \"%s\".\n", argv[arg - 1]);
      break;
    default:
      fprintf(stderr, "Unknown option \"-%c\".\n", opt);
      return 1;
    }
  }
#ifndef WIN32
  putenv((char *)"TZ=UTC"); // dcraw compatibility, affects TIFF datestamp field
#else
  _putenv((char *)"TZ=UTC"); // dcraw compatibility, affects TIFF datestamp field
#endif
#define P1 RawProcessor.imgdata.idata
#define S RawProcessor.imgdata.sizes
#define C RawProcessor.imgdata.color
#define T RawProcessor.imgdata.thumbnail
#define P2 RawProcessor.imgdata.other

  if (verbosity > 1)
    RawProcessor.set_progress_handler(my_progress_callback, (void *)"Sample data passed");
#ifdef LIBRAW_USE_OPENMP
  if (verbosity)
    printf("Using %d threads\n", omp_get_max_threads());
#endif

  for (; arg < argc; arg++)
  {
    char outfn[1024];

    if (verbosity)
      printf("Processing file %s\n", argv[arg]);

    timerstart();

#ifndef WIN32
    if (use_mmap)
    {
      int file = open(argv[arg], O_RDONLY);
      struct stat st;
      if (file < 0)
      {
        fprintf(stderr, "Cannot open %s: %s\n", argv[arg], strerror(errno));
        continue;
      }
      if (fstat(file, &st))
      {
        fprintf(stderr, "Cannot stat %s: %s\n", argv[arg], strerror(errno));
        close(file);
        continue;
      }
      int pgsz = getpagesize();
      msize = ((st.st_size + pgsz - 1) / pgsz) * pgsz;
      iobuffer = mmap(NULL, msize, PROT_READ, MAP_PRIVATE, file, 0);
      if (!iobuffer)
      {
        fprintf(stderr, "Cannot mmap %s: %s\n", argv[arg], strerror(errno));
        close(file);
        continue;
      }
      close(file);
      if ((ret = RawProcessor.open_buffer(iobuffer, st.st_size) != LIBRAW_SUCCESS))
      {
        fprintf(stderr, "Cannot open_buffer %s: %s\n", argv[arg], libraw_strerror(ret));
        continue; // no recycle b/c open file will recycle itself
      }
    }
    else
#endif
        if (use_mem)
    {
      int file = open(argv[arg], O_RDONLY | O_BINARY);
      struct stat st;
      if (file < 0)
      {
        fprintf(stderr, "Cannot open %s: %s\n", argv[arg], strerror(errno));
        continue;
      }
      if (fstat(file, &st))
      {
        fprintf(stderr, "Cannot stat %s: %s\n", argv[arg], strerror(errno));
        close(file);
        continue;
      }
      if (!(iobuffer = malloc(st.st_size)))
      {
        fprintf(stderr, "Cannot allocate %d kbytes for memory buffer\n", (int)(st.st_size / 1024));
        close(file);
        continue;
      }
      int rd;
      if (st.st_size != (rd = read(file, iobuffer, st.st_size)))
      {
        fprintf(stderr, "Cannot read %d bytes instead of  %d to memory buffer\n", (int)rd, (int)st.st_size);
        close(file);
        free(iobuffer);
        continue;
      }
      close(file);
      if ((ret = RawProcessor.open_buffer(iobuffer, st.st_size)) != LIBRAW_SUCCESS)
      {
        fprintf(stderr, "Cannot open_buffer %s: %s\n", argv[arg], libraw_strerror(ret));
        free(iobuffer);
        continue; // no recycle b/c open file will recycle itself
      }
    }
    else
    {
      if (use_bigfile)
        // force open_file switch to bigfile processing
        ret = RawProcessor.open_file(argv[arg], 1);
      else
        ret = RawProcessor.open_file(argv[arg]);

      if (ret != LIBRAW_SUCCESS)
      {
        fprintf(stderr, "Cannot open %s: %s\n", argv[arg], libraw_strerror(ret));
        continue; // no recycle b/c open_file will recycle itself
      }
    }

    if (use_timing)
      timerprint("LibRaw::open_file()", argv[arg]);

    timerstart();
    if ((ret = RawProcessor.unpack()) != LIBRAW_SUCCESS)
    {
      fprintf(stderr, "Cannot unpack %s: %s\n", argv[arg], libraw_strerror(ret));
      continue;
    }

    if (use_timing)
      timerprint("LibRaw::unpack()", argv[arg]);

    timerstart();
    if (LIBRAW_SUCCESS != (ret = RawProcessor.dcraw_process()))
    {
      fprintf(stderr, "Cannot do postpocessing on %s: %s\n", argv[arg], libraw_strerror(ret));
      if (LIBRAW_FATAL_ERROR(ret))
        continue;
    }
    if (use_timing)
      timerprint("LibRaw::dcraw_process()", argv[arg]);

    snprintf(outfn, sizeof(outfn), "%s.%s", argv[arg], OUT.output_tiff ? "tiff" : (P1.colors > 1 ? "ppm" : "pgm"));

    if (verbosity)
    {
      printf("Writing file %s\n", outfn);
    }

    if (LIBRAW_SUCCESS != (ret = RawProcessor.dcraw_ppm_tiff_writer(outfn)))
      fprintf(stderr, "Cannot write %s: %s\n", outfn, libraw_strerror(ret));

#ifndef WIN32
    if (use_mmap && iobuffer)
    {
      munmap(iobuffer, msize);
      iobuffer = 0;
    }
#endif
    else if (use_mem && iobuffer)
    {
      free(iobuffer);
      iobuffer = 0;
    }

    RawProcessor.recycle(); // just for show this call
  }
#ifdef USE_DNGSDK
  if (dnghost)
    delete dnghost;
#endif
  return 0;
}
