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image_to_j2k.c

/*
 * Copyright (c) 2001-2003, David Janssens
 * Copyright (c) 2002-2003, Yannick Verschueren
 * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
 * Copyright (c) 2005, Hervé Drolon, FreeImage Team
 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include "openjpeg.h"
#include "compat/getopt.h"
#include "convert.h"

#ifndef WIN32
#define stricmp strcasecmp
#define strnicmp strncasecmp
#endif

/* ----------------------------------------------------------------------- */

#define J2K_CFMT 0
#define JP2_CFMT 1
#define JPT_CFMT 2
#define MJ2_CFMT 3
#define PXM_DFMT 0
#define PGX_DFMT 1
#define BMP_DFMT 2
#define YUV_DFMT 3

/* ----------------------------------------------------------------------- */

void encode_help_display() {
      fprintf(stdout,"HELP\n----\n\n");
      fprintf(stdout,"- the -h option displays this help information on screen\n\n");


      fprintf(stdout,"List of parameters for the JPEG 2000 encoder:\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"REMARKS:\n");
      fprintf(stdout,"---------\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"The markers written to the main_header are : SOC SIZ COD QCD COM.\n");
      fprintf(stdout,"COD and QCD never appear in the tile_header.\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"- This coder can encode a mega image, a test was made on a 24000x24000 pixels \n");
      fprintf(stdout,"color image.  You need enough disk space memory (twice the original) to encode \n");
      fprintf(stdout,"the image,i.e. for a 1.5 GB image you need a minimum of 3GB of disk memory)\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"By default:\n");
      fprintf(stdout,"------------\n");
      fprintf(stdout,"\n");
      fprintf(stdout," * Lossless\n");
      fprintf(stdout," * 1 tile\n");
      fprintf(stdout," * Size of precinct : 2^15 x 2^15 (means 1 precinct)\n");
      fprintf(stdout," * Size of code-block : 64 x 64\n");
      fprintf(stdout," * Number of resolutions: 6\n");
      fprintf(stdout," * No SOP marker in the codestream\n");
      fprintf(stdout," * No EPH marker in the codestream\n");
      fprintf(stdout," * No sub-sampling in x or y direction\n");
      fprintf(stdout," * No mode switch activated\n");
      fprintf(stdout," * Progression order: LRCP\n");
      fprintf(stdout," * No index file\n");
      fprintf(stdout," * No ROI upshifted\n");
      fprintf(stdout," * No offset of the origin of the image\n");
      fprintf(stdout," * No offset of the origin of the tiles\n");
      fprintf(stdout," * Reversible DWT 5-3\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"Parameters:\n");
      fprintf(stdout,"------------\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"Required Parameters (except with -h):\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-i           : source file  (-i source.pnm also *.pgm, *.ppm) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-o           : destination file (-o dest.j2k or .jp2) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"Optional Parameters:\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-h           : display the help information \n ");
      fprintf(stdout,"\n");
      fprintf(stdout,"-r           : different compression ratios for successive layers (-r 20,10,5)\n ");
      fprintf(stdout,"           - The rate specified for each quality level is the desired \n");
      fprintf(stdout,"             compression factor.\n");
      fprintf(stdout,"           Example: -r 20,10,1 means quality 1: compress 20x, \n");
      fprintf(stdout,"             quality 2: compress 10x and quality 3: compress lossless\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"               (options -r and -q cannot be used together)\n ");
      fprintf(stdout,"\n");

      fprintf(stdout,"-q           : different psnr for successive layers (-q 30,40,50) \n ");

      fprintf(stdout,"               (options -r and -q cannot be used together)\n ");

      fprintf(stdout,"\n");
      fprintf(stdout,"-n           : number of resolutions (-n 3) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-b           : size of code block (-b 32,32) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-c           : size of precinct (-c 128,128) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-t           : size of tile (-t 512,512) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-p           : progression order (-p LRCP) [LRCP, RLCP, RPCL, PCRL, CPRL] \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-s           : subsampling factor (-s 2,2) [-s X,Y] \n");
      fprintf(stdout,"       Remark: subsampling bigger than 2 can produce error\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-SOP         : write SOP marker before each packet \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-EPH         : write EPH marker after each header packet \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-M           : mode switch (-M 3) [1=BYPASS(LAZY) 2=RESET 4=RESTART(TERMALL)\n");
      fprintf(stdout,"                 8=VSC 16=ERTERM(SEGTERM) 32=SEGMARK(SEGSYM)] \n");
      fprintf(stdout,"                 Indicate multiple modes by adding their values. \n");
      fprintf(stdout,"                 ex: RESTART(4) + RESET(2) + SEGMARK(32) = -M 38\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-x           : create an index file *.Idx (-x index_name.Idx) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-ROI         : c=%%d,U=%%d : quantization indices upshifted \n");
      fprintf(stdout,"               for component c=%%d [%%d = 0,1,2]\n");
      fprintf(stdout,"               with a value of U=%%d [0 <= %%d <= 37] (i.e. -ROI:c=0,U=25) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-d           : offset of the origin of the image (-d 150,300) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-T           : offset of the origin of the tiles (-T 100,75) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"-I           : use the irreversible DWT 9-7 (-I) \n");
      fprintf(stdout,"\n");
      fprintf(stdout,"IMPORTANT:\n");
      fprintf(stdout,"-----------\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"The index file has the structure below:\n");
      fprintf(stdout,"---------------------------------------\n");
      fprintf(stdout,"\n");
      fprintf(stdout,"Image_height Image_width\n");
      fprintf(stdout,"progression order\n");
      fprintf(stdout,"Tiles_size_X Tiles_size_Y\n");
      fprintf(stdout,"Components_nb\n");
      fprintf(stdout,"Layers_nb\n");
      fprintf(stdout,"decomposition_levels\n");
      fprintf(stdout,"[Precincts_size_X_res_Nr Precincts_size_Y_res_Nr]...\n");
      fprintf(stdout,"   [Precincts_size_X_res_0 Precincts_size_Y_res_0]\n");
      fprintf(stdout,"Main_header_end_position\n");
      fprintf(stdout,"Codestream_size\n");
      fprintf(stdout,"Tile_0 start_pos end_Theader end_pos TotalDisto NumPix MaxMSE\n");
      fprintf(stdout,"Tile_1   ''           ''        ''        ''       ''    ''\n");
      fprintf(stdout,"...\n");
      fprintf(stdout,"Tile_Nt   ''           ''        ''        ''       ''    ''\n");
      fprintf(stdout,"Tpacket_0 Tile layer res. comp. prec. start_pos end_pos disto\n");
      fprintf(stdout,"...\n");
      fprintf(stdout,"Tpacket_Np ''   ''    ''   ''    ''       ''       ''     ''\n");

      fprintf(stdout,"MaxDisto\n");

      fprintf(stdout,"TotalDisto\n\n");
}

OPJ_PROG_ORDER give_progression(char progression[4]) {
      if(strncmp(progression, "LRCP", 4) == 0) {
            return LRCP;
      }
      if(strncmp(progression, "RLCP", 4) == 0) {
            return RLCP;
      }
      if(strncmp(progression, "RPCL", 4) == 0) {
            return RPCL;
      }
      if(strncmp(progression, "PCRL", 4) == 0) {
            return PCRL;
      }
      if(strncmp(progression, "CPRL", 4) == 0) {
            return CPRL;
      }

      return PROG_UNKNOWN;
}

int get_file_format(char *filename) {
      unsigned int i;
      static const char *extension[] = {"pgx", "pnm", "pgm", "ppm", "bmp", "j2k", "jp2" };
      static const int format[] = { PGX_DFMT, PXM_DFMT, PXM_DFMT, PXM_DFMT, BMP_DFMT, J2K_CFMT, JP2_CFMT };
      char * ext = strrchr(filename, '.') + 1;
      for(i = 0; i < sizeof(format)/sizeof(*format); i++) {
            if(strnicmp(ext, extension[i], 3) == 0) {
                  return format[i];
            }
      }

      return -1;
}

/* ------------------------------------------------------------------------------------ */

int parse_cmdline_encoder(int argc, char **argv, opj_cparameters_t *parameters) {
      int i, j;

      /* parse the command line */

      while (1) {
            int c = getopt(argc, argv, "i:o:r:q:f:t:n:c:b:x:p:s:d:hP:S:E:M:R:T:C:I");
            if (c == -1)
                  break;
            switch (c) {
                  case 'i':               /* input file */
                  {
                        char *infile = optarg;
                        parameters->decod_format = get_file_format(infile);
                        switch(parameters->decod_format) {
                              case PGX_DFMT:
                              case PXM_DFMT:
                              case BMP_DFMT:
                                    break;
                              default:
                                    fprintf(stderr, 
                                          "!! Unrecognized format for infile : %s [accept only *.pnm, *.pgm, *.ppm, *.pgx or *.bmp] !!\n\n", 
                                          infile);
                                    return 1;
                        }
                        strncpy(parameters->infile, infile, MAX_PATH);
                  }
                  break;
                        
                        /* ----------------------------------------------------- */

                  case 'o':               /* output file */
                  {
                        char *outfile = optarg;
                        parameters->cod_format = get_file_format(outfile);
                        switch(parameters->cod_format) {
                              case J2K_CFMT:
                              case JP2_CFMT:
                                    break;
                              default:
                                    fprintf(stderr, "Unknown output format image %s [only *.j2k, *.jp2]!! \n", outfile);
                                    return 1;
                        }
                        strncpy(parameters->outfile, outfile, MAX_PATH);
                  }
                  break;

                        /* ----------------------------------------------------- */
                  
                  case 'r':               /* rates rates/distorsion */
                  {
                        char *s = optarg;
                        while (sscanf(s, "%d", &parameters->tcp_rates[parameters->tcp_numlayers]) == 1) {
                              parameters->tcp_numlayers++;
                              while (*s && *s != ',') {
                                    s++;
                              }
                              if (!*s)
                                    break;
                              s++;
                        }
                        parameters->cp_disto_alloc = 1;
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 'q':               /* add fixed_quality */
                  {
                        char *s = optarg;
                        while (sscanf(s, "%f", &parameters->tcp_distoratio[parameters->tcp_numlayers]) == 1) {
                              parameters->tcp_numlayers++;
                              while (*s && *s != ',') {
                                    s++;
                              }
                              if (!*s)
                                    break;
                              s++;
                        }
                        parameters->cp_fixed_quality = 1;
                  }
                  break;
                        
                        /* dda */
                        /* ----------------------------------------------------- */

                  case 'f':               /* mod fixed_quality (before : -q) */
                  {
                        int *row = NULL, *col = NULL;
                        int numlayers = 0, numresolution = 0, matrix_width = 0;

                        char *s = optarg;
                        sscanf(s, "%d", &numlayers);
                        s++;
                        if (numlayers > 9)
                              s++;

                        parameters->tcp_numlayers = numlayers;
                        numresolution = parameters->numresolution;
                        matrix_width = numresolution * 3;
                        parameters->cp_matrice = (int *) malloc(numlayers * matrix_width * sizeof(int));
                        s = s + 2;

                        for (i = 0; i < numlayers; i++) {
                              row = &parameters->cp_matrice[i * matrix_width];
                              col = row;
                              parameters->tcp_rates[i] = 1;
                              sscanf(s, "%d,", &col[0]);
                              s += 2;
                              if (col[0] > 9)
                                    s++;
                              col[1] = 0;
                              col[2] = 0;
                              for (j = 1; j < numresolution; j++) {
                                    col += 3;
                                    sscanf(s, "%d,%d,%d", &col[0], &col[1], &col[2]);
                                    s += 6;
                                    if (col[0] > 9)
                                          s++;
                                    if (col[1] > 9)
                                          s++;
                                    if (col[2] > 9)
                                          s++;
                              }
                              if (i < numlayers - 1)
                                    s++;
                        }
                        parameters->cp_fixed_alloc = 1;
                  }
                  break;
                        
                        /* ----------------------------------------------------- */

                  case 't':               /* tiles */
                  {
                        sscanf(optarg, "%d,%d", &parameters->cp_tdx, &parameters->cp_tdy);
                        parameters->tile_size_on = true;
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 'n':               /* resolution */
                  {
                        sscanf(optarg, "%d", &parameters->numresolution);
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  case 'c':               /* precinct dimension */
                  {
                        char sep;
                        int res_spec = 0;

                        char *s = optarg;
                        do {
                              sep = 0;
                              sscanf(s, "[%d,%d]%c", &parameters->prcw_init[res_spec], &parameters->prch_init[res_spec], &sep);
                              parameters->csty |= 0x01;
                              res_spec++;
                              s = strpbrk(s, "]") + 2;
                        }
                        while (sep == ',');
                        parameters->res_spec = res_spec;
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 'b':               /* code-block dimension */
                  {
                        int cblockw_init = 0, cblockh_init = 0;
                        sscanf(optarg, "%d,%d", &cblockw_init, &cblockh_init);
                        if (cblockw_init * cblockh_init > 4096 || cblockw_init > 1024
                              || cblockw_init < 4 || cblockh_init > 1024 || cblockh_init < 4) {
                              fprintf(stderr,
                                    "!! Size of code_block error (option -b) !!\n\nRestriction :\n    * width*height<=4096\n    * 4<=width,height<= 1024\n\n");
                              return 1;
                        }
                        parameters->cblockw_init = cblockw_init;
                        parameters->cblockh_init = cblockh_init;
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 'x':               /* creation of index file */
                  {
                        char *index = optarg;
                        strncpy(parameters->index, index, MAX_PATH);
                        parameters->index_on = 1;
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 'p':               /* progression order */
                  {
                        char progression[4];

                        strncpy(progression, optarg, 4);
                        parameters->prog_order = give_progression(progression);
                        if (parameters->prog_order == -1) {
                              fprintf(stderr, "Unrecognized progression order [LRCP, RLCP, RPCL, PCRL, CPRL] !!\n");
                              return 1;
                        }
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 's':               /* subsampling factor */
                  {
                        if (sscanf(optarg, "%d,%d", &parameters->subsampling_dx, &parameters->subsampling_dy) != 2) {
                              fprintf(stderr,   "'-s' sub-sampling argument error !  [-s dx,dy]\n");
                              return 1;
                        }
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 'd':               /* coordonnate of the reference grid */
                  {
                        if (sscanf(optarg, "%d,%d", &parameters->image_offset_x0, &parameters->image_offset_y0) != 2) {
                              fprintf(stderr,   "-d 'coordonnate of the reference grid' argument error !! [-d x0,y0]\n");
                              return 1;
                        }
                  }
                  break;
                        
                        /* ----------------------------------------------------- */
                  
                  case 'h':               /* display an help description */
                        encode_help_display();
                        return 1;
                        
                        /* ----------------------------------------------------- */

                  case 'P':               /* POC */
                  {
                        int numpocs = 0;        /* number of progression order change (POC) default 0 */
                        opj_poc_t *POC = NULL;  /* POC : used in case of Progression order change */

                        char *s = optarg;
                        POC = parameters->POC;

                        fprintf(stderr, "/----------------------------------\\\n");
                        fprintf(stderr, "|  POC option not fully tested !!  |\n");
                        fprintf(stderr, "\\----------------------------------/\n");
                        
                        while (sscanf(s, "T%d=%d,%d,%d,%d,%d,%s", &POC[numpocs].tile,
                              &POC[numpocs].resno0, &POC[numpocs].compno0,
                              &POC[numpocs].layno1, &POC[numpocs].resno1,
                              &POC[numpocs].compno1, POC[numpocs].progorder) == 7) {
                              POC[numpocs].prg = give_progression(POC[numpocs].progorder);
                              /* POC[numpocs].tile; */
                              numpocs++;
                              while (*s && *s != '/') {
                                    s++;
                              }
                              if (!*s) {
                                    break;
                              }
                              s++;
                        }
                        parameters->numpocs = numpocs;
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                        
                  case 'S':               /* SOP marker */
                  {
                        parameters->csty |= 0x02;
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                  
                  case 'E':               /* EPH marker */
                  {
                        parameters->csty |= 0x04;
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                  
                  case 'M':               /* Mode switch pas tous au point !! */
                  {
                        int value = 0;
                        if (sscanf(optarg, "%d", &value) == 1) {
                              for (i = 0; i <= 5; i++) {
                                    int cache = value & (1 << i);
                                    if (cache)
                                          parameters->mode |= (1 << i);
                              }
                        }
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                  
                  case 'R':               /* ROI */
                  {
                        if (sscanf(optarg, "OI:c=%d,U=%d", &parameters->roi_compno, &parameters->roi_shift) != 2) {
                              fprintf(stderr, "ROI error !! [-ROI:c='compno',U='shift']\n");
                              return 1;
                        }
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                  
                  case 'T':               /* Tile offset */
                  {
                        if (sscanf(optarg, "%d,%d", &parameters->cp_tx0, &parameters->cp_ty0) != 2) {
                              fprintf(stderr, "-T 'tile offset' argument error !! [-T X0,Y0]");
                              return 1;
                        }
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                        
                  case 'C':               /* add a comment */
                  {
                        parameters->cp_comment = (char*)malloc(strlen(optarg) + 1);
                        if(parameters->cp_comment) {
                              strcpy(parameters->cp_comment, optarg);
                        }
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                  
                  case 'I':               /* reversible or not */
                  {
                        parameters->irreversible = 1;
                  }
                  break;
                        
                        /* ------------------------------------------------------ */
                  
                  default:
                        fprintf(stderr, "ERROR -> this option is not valid \"-%c %s\"\n", c, optarg);
                        return 1;
            }
      }

      /* check for possible errors */

      if((parameters->infile[0] == 0) || (parameters->outfile[0] == 0)) {
            fprintf(stderr, "usage: image_to_j2k -i image-file -o j2k/jp2-file (+ options)\n");
            return 1;
      }

      if ((parameters->cp_disto_alloc || parameters->cp_fixed_alloc || parameters->cp_fixed_quality)
            && (!(parameters->cp_disto_alloc ^ parameters->cp_fixed_alloc ^ parameters->cp_fixed_quality))) {
            fprintf(stderr, "Error: options -r -q and -f cannot be used together !!\n");
            return 1;
      }                       /* mod fixed_quality */

      /* if no rate entered, lossless by default */
      if (parameters->tcp_numlayers == 0) {
            parameters->tcp_rates[0] = 0; /* MOD antonin : losslessbug */
            parameters->tcp_numlayers++;
            parameters->cp_disto_alloc = 1;
      }

      if((parameters->cp_tx0 > parameters->image_offset_x0) || (parameters->cp_ty0 > parameters->image_offset_y0)) {
            fprintf(stderr,
                  "Error: Tile offset dimension is unnappropriate --> TX0(%d)<=IMG_X0(%d) TYO(%d)<=IMG_Y0(%d) \n",
                  parameters->cp_tx0, parameters->image_offset_x0, parameters->cp_ty0, parameters->image_offset_y0);
            return 1;
      }

      for (i = 0; i < parameters->numpocs; i++) {
            if (parameters->POC[i].prg == -1) {
                  fprintf(stderr,
                        "Unrecognized progression order in option -P (POC n %d) [LRCP, RLCP, RPCL, PCRL, CPRL] !!\n",
                        i + 1);
            }
      }

      return 0;
}

/* -------------------------------------------------------------------------- */

/**
sample error callback expecting a FILE* client object
*/
void error_callback(const char *msg, void *client_data) {
      FILE *stream = (FILE*)client_data;
      fprintf(stream, "[ERROR] %s", msg);
}
/**
sample warning callback expecting a FILE* client object
*/
void warning_callback(const char *msg, void *client_data) {
      FILE *stream = (FILE*)client_data;
      fprintf(stream, "[WARNING] %s", msg);
}
/**
sample debug callback expecting a FILE* client object
*/
void info_callback(const char *msg, void *client_data) {
      FILE *stream = (FILE*)client_data;
      fprintf(stream, "[INFO] %s", msg);
}

/* -------------------------------------------------------------------------- */

int main(int argc, char **argv) {
      bool bSuccess;
      bool delete_comment = true;
      opj_cparameters_t parameters; /* compression parameters */
      opj_event_mgr_t event_mgr;          /* event manager */
      opj_image_t *image = NULL;

      /* 
      configure the event callbacks (not required)
      setting of each callback is optionnal 
      */
      memset(&event_mgr, 0, sizeof(opj_event_mgr_t));
      event_mgr.error_handler = error_callback;
      event_mgr.warning_handler = warning_callback;
      event_mgr.info_handler = info_callback;

      /* set encoding parameters to default values */
      opj_set_default_encoder_parameters(&parameters);

      /* parse input and get user encoding parameters */
      if(parse_cmdline_encoder(argc, argv, &parameters) == 1) {
            return 0;
      }

      if(parameters.cp_comment == NULL) {
            parameters.cp_comment = "Created by OpenJPEG version 0.9";
            /* no need to delete parameters.cp_comment on exit */
            delete_comment = false;
      }

      /* decode the source image */
      /* ----------------------- */

      switch (parameters.decod_format) {
            case PGX_DFMT:
                  image = pgxtoimage(parameters.infile, &parameters);
                  if (!image) {
                        fprintf(stderr, " unable to load pgx file\n");
                        return 1;
                  }
                  break;
            
            case PXM_DFMT:
                  image = pnmtoimage(parameters.infile, &parameters);
                  if (!image) {
                        fprintf(stderr, " not a pnm file\n");
                        return 1;
                  }
                  break;

            case BMP_DFMT:
                  image = bmptoimage(parameters.infile, &parameters);
                  if (!image) {
                        fprintf(stderr, " not a bmp file\n");
                        return 1;
                  }
                  break;
      }

      /* encode the destination image */
      /* ---------------------------- */

      if (parameters.cod_format == J2K_CFMT) {  /* J2K format output */
            int codestream_length;
            opj_cio_t *cio = NULL;
            FILE *f = NULL;

            /* get a J2K compressor handle */
            opj_cinfo_t* cinfo = opj_create_compress(CODEC_J2K);

            /* catch events using our callbacks and give a local context */
            opj_set_event_mgr((opj_common_ptr)cinfo, &event_mgr, stderr);                 

            /* setup the encoder parameters using the current image and using user parameters */
            opj_setup_encoder(cinfo, &parameters, image);

            /* open a byte stream for writing */
            /* allocate memory for all tiles */
            cio = opj_cio_open((opj_common_ptr)cinfo, NULL, 0);

            /* encode the image */
            bSuccess = opj_encode(cinfo, cio, image, parameters.index);
            if (!bSuccess) {
                  opj_cio_close(cio);
                  fprintf(stderr, "failed to encode image\n");
                  return 1;
            }
            codestream_length = cio_tell(cio);

            /* write the buffer to disk */
            f = fopen(parameters.outfile, "wb");
            if (!f) {
                  fprintf(stderr, "failed to open %s for writing\n", parameters.outfile);
                  return 1;
            }
            fwrite(cio->buffer, 1, codestream_length, f);
            fclose(f);

            /* close and free the byte stream */
            opj_cio_close(cio);

            /* free remaining compression structures */
            opj_destroy_compress(cinfo);

      } else {                /* JP2 format output */
            int codestream_length;
            opj_cio_t *cio = NULL;
            FILE *f = NULL;

            /* get a JP2 compressor handle */
            opj_cinfo_t* cinfo = opj_create_compress(CODEC_JP2);

            /* catch events using our callbacks and give a local context */
            opj_set_event_mgr((opj_common_ptr)cinfo, &event_mgr, stderr);                 

            /* setup the encoder parameters using the current image and using user parameters */
            opj_setup_encoder(cinfo, &parameters, image);

            /* open a byte stream for writing */
            /* allocate memory for all tiles */
            cio = opj_cio_open((opj_common_ptr)cinfo, NULL, 0);

            /* encode the image */
            bSuccess = opj_encode(cinfo, cio, image, parameters.index);
            if (!bSuccess) {
                  opj_cio_close(cio);
                  fprintf(stderr, "failed to encode image\n");
                  return 1;
            }
            codestream_length = cio_tell(cio);

            /* write the buffer to disk */
            f = fopen(parameters.outfile, "wb");
            if (!f) {
                  fprintf(stderr, "failed to open %s for writing\n", parameters.outfile);
                  return 1;
            }
            fwrite(cio->buffer, 1, codestream_length, f);
            fclose(f);

            /* close and free the byte stream */
            opj_cio_close(cio);

            /* free remaining compression structures */
            opj_destroy_compress(cinfo);

      }

      /* free user parameters structure */
      if(delete_comment) {
            if(parameters.cp_comment) free(parameters.cp_comment);
      }
      if(parameters.cp_matrice) free(parameters.cp_matrice);

      /* free image data */
      opj_image_destroy(image);

      return 0;
}


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