/*
 * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
 * Copyright (c) 2002-2007, Professor Benoit Macq
 * Copyright (c) 2001-2003, David Janssens
 * Copyright (c) 2002-2003, Yannick Verschueren
 * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
 * Copyright (c) 2005, Herve Drolon, FreeImage Team
 * Copyright (c) 2006-2007, Parvatha Elangovan
 * 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 "opj_config.h"

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>

#ifdef _WIN32
#include "windirent.h"
#else
#include <dirent.h>
#endif /* _WIN32 */

#ifdef _WIN32
#include <windows.h>
#define strcasecmp _stricmp
#define strncasecmp _strnicmp
#else
#include <strings.h>
#endif /* _WIN32 */

#include "openjpeg.h"
#include "opj_getopt.h"
#include "convert.h"
#include "index.h"

#ifdef HAVE_LIBLCMS2
#include <lcms2.h>
#endif
#ifdef HAVE_LIBLCMS1
#include <lcms.h>
#endif
#include "color.h"

#include "format_defs.h"

typedef struct dircnt{
	/** Buffer for holding images read from Directory*/
	char *filename_buf;
	/** Pointer to the buffer*/
	char **filename;
}dircnt_t;


typedef struct img_folder{
	/** The directory path of the folder containing input images*/
	char *imgdirpath;
	/** Output format*/
	const char *out_format;
	/** Enable option*/
	char set_imgdir;
	/** Enable Cod Format for output*/
	char set_out_format;

}img_fol_t;

/* -------------------------------------------------------------------------- */
/* Declarations                                                               */
int get_num_images(char *imgdirpath);
int load_images(dircnt_t *dirptr, char *imgdirpath);
int get_file_format(const char *filename);
char get_next_file(int imageno,dircnt_t *dirptr,img_fol_t *img_fol, opj_dparameters_t *parameters);
static int infile_format(const char *fname);

int parse_cmdline_decoder(int argc, char **argv, opj_dparameters_t *parameters,img_fol_t *img_fol, char *indexfilename);
int parse_DA_values( char* inArg, unsigned int *DA_x0, unsigned int *DA_y0, unsigned int *DA_x1, unsigned int *DA_y1);

/* -------------------------------------------------------------------------- */
void decode_help_display(void) {
	fprintf(stdout,"HELP for j2k_to_image\n----\n\n");
	fprintf(stdout,"- the -h option displays this help information on screen\n\n");

/* UniPG>> */
	fprintf(stdout,"List of parameters for the JPEG 2000 "
#ifdef USE_JPWL
		"+ JPWL "
#endif /* USE_JPWL */
		"decoder:\n");
/* <<UniPG */
	fprintf(stdout,"\n");
	fprintf(stdout,"\n");
	fprintf(stdout,"  -ImgDir \n");
	fprintf(stdout,"	Image file Directory path \n");
	fprintf(stdout,"  -OutFor \n");
	fprintf(stdout,"    REQUIRED only if -ImgDir is used\n");
	fprintf(stdout,"	  Need to specify only format without filename <BMP>  \n");
	fprintf(stdout,"    Currently accepts PGM, PPM, PNM, PGX, PNG, BMP, TIF, RAW and TGA formats\n");
	fprintf(stdout,"  -i <compressed file>\n");
	fprintf(stdout,"    REQUIRED only if an Input image directory not specified\n");
	fprintf(stdout,"    Currently accepts J2K-files, JP2-files and JPT-files. The file type\n");
	fprintf(stdout,"    is identified based on its suffix.\n");
	fprintf(stdout,"  -o <decompressed file>\n");
	fprintf(stdout,"    REQUIRED\n");
	fprintf(stdout,"    Currently accepts PGM, PPM, PNM, PGX, PNG, BMP, TIF, RAW and TGA files\n");
	fprintf(stdout,"    Binary data is written to the file (not ascii). If a PGX\n");
	fprintf(stdout,"    filename is given, there will be as many output files as there are\n");
	fprintf(stdout,"    components: an indice starting from 0 will then be appended to the\n");
	fprintf(stdout,"    output filename, just before the \"pgx\" extension. If a PGM filename\n");
	fprintf(stdout,"    is given and there are more than one component, only the first component\n");
	fprintf(stdout,"    will be written to the file.\n");
	fprintf(stdout,"  -r <reduce factor>\n");
	fprintf(stdout,"    Set the number of highest resolution levels to be discarded. The\n");
	fprintf(stdout,"    image resolution is effectively divided by 2 to the power of the\n");
	fprintf(stdout,"    number of discarded levels. The reduce factor is limited by the\n");
	fprintf(stdout,"    smallest total number of decomposition levels among tiles.\n");
	fprintf(stdout,"  -l <number of quality layers to decode>\n");
	fprintf(stdout,"    Set the maximum number of quality layers to decode. If there are\n");
	fprintf(stdout,"    less quality layers than the specified number, all the quality layers\n");
	fprintf(stdout,"    are decoded.\n");
	fprintf(stdout,"  -x  \n"); 
	fprintf(stdout,"    Create an index file *.Idx (-x index_name.Idx) \n");
	fprintf(stdout,"  -d <x0,y0,x1,y1>\n");
	fprintf(stdout,"    OPTIONAL\n");
	fprintf(stdout,"    Decoding area\n");
	fprintf(stdout,"    By default all the image is decoded.\n");
	fprintf(stdout,"  -t <tile_number>\n");
	fprintf(stdout,"    OPTIONAL\n");
	fprintf(stdout,"    Set the tile number of the decoded tile. Follow the JPEG2000 convention from left-up to bottom-up\n");
	fprintf(stdout,"    By default all tiles are decoded.\n");
	fprintf(stdout,"\n");
/* UniPG>> */
#ifdef USE_JPWL
	fprintf(stdout,"  -W <options>\n");
	fprintf(stdout,"    Activates the JPWL correction capability, if the codestream complies.\n");
	fprintf(stdout,"    Options can be a comma separated list of <param=val> tokens:\n");
	fprintf(stdout,"    c, c=numcomps\n");
	fprintf(stdout,"       numcomps is the number of expected components in the codestream\n");
	fprintf(stdout,"       (search of first EPB rely upon this, default is %d)\n", JPWL_EXPECTED_COMPONENTS);
#endif /* USE_JPWL */
/* <<UniPG */
	fprintf(stdout,"\n");
}

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

int get_num_images(char *imgdirpath){
	DIR *dir;
	struct dirent* content;	
	int num_images = 0;

	/*Reading the input images from given input directory*/

	dir= opendir(imgdirpath);
	if(!dir){
		fprintf(stderr,"Could not open Folder %s\n",imgdirpath);
		return 0;
	}
	
	while((content=readdir(dir))!=NULL){
		if(strcmp(".",content->d_name)==0 || strcmp("..",content->d_name)==0 )
			continue;
		num_images++;
	}
	return num_images;
}

/* -------------------------------------------------------------------------- */
int load_images(dircnt_t *dirptr, char *imgdirpath){
	DIR *dir;
	struct dirent* content;	
	int i = 0;

	/*Reading the input images from given input directory*/

	dir= opendir(imgdirpath);
	if(!dir){
		fprintf(stderr,"Could not open Folder %s\n",imgdirpath);
		return 1;
	}else	{
		fprintf(stderr,"Folder opened successfully\n");
	}
	
	while((content=readdir(dir))!=NULL){
		if(strcmp(".",content->d_name)==0 || strcmp("..",content->d_name)==0 )
			continue;

		strcpy(dirptr->filename[i],content->d_name);
		i++;
	}
	return 0;	
}

/* -------------------------------------------------------------------------- */
int get_file_format(const char *filename) {
	unsigned int i;
	static const char *extension[] = {"pgx", "pnm", "pgm", "ppm", "bmp","tif", "raw", "rawl", "tga", "png", "j2k", "jp2", "jpt", "j2c", "jpc" };
	static const int format[] = { PGX_DFMT, PXM_DFMT, PXM_DFMT, PXM_DFMT, BMP_DFMT, TIF_DFMT, RAW_DFMT, RAWL_DFMT, TGA_DFMT, PNG_DFMT, J2K_CFMT, JP2_CFMT, JPT_CFMT, J2K_CFMT, J2K_CFMT };
	char * ext = strrchr(filename, '.');
	if (ext == NULL)
		return -1;
	ext++;
	if(ext) {
		for(i = 0; i < sizeof(format)/sizeof(*format); i++) {
			if(strcasecmp(ext, extension[i]) == 0) {
				return format[i];
			}
		}
	}

	return -1;
}

/* -------------------------------------------------------------------------- */
char get_next_file(int imageno,dircnt_t *dirptr,img_fol_t *img_fol, opj_dparameters_t *parameters){
	char image_filename[OPJ_PATH_LEN], infilename[OPJ_PATH_LEN],outfilename[OPJ_PATH_LEN],temp_ofname[OPJ_PATH_LEN];
	char *temp_p, temp1[OPJ_PATH_LEN]="";

	strcpy(image_filename,dirptr->filename[imageno]);
	fprintf(stderr,"File Number %d \"%s\"\n",imageno,image_filename);
	parameters->decod_format = infile_format(image_filename);
	if (parameters->decod_format == -1)
		return 1;
	sprintf(infilename,"%s/%s",img_fol->imgdirpath,image_filename);
	strncpy(parameters->infile, infilename, sizeof(infilename));

	/*Set output file*/
	strcpy(temp_ofname,strtok(image_filename,"."));
	while((temp_p = strtok(NULL,".")) != NULL){
		strcat(temp_ofname,temp1);
		sprintf(temp1,".%s",temp_p);
	}
	if(img_fol->set_out_format==1){
		sprintf(outfilename,"%s/%s.%s",img_fol->imgdirpath,temp_ofname,img_fol->out_format);
		strncpy(parameters->outfile, outfilename, sizeof(outfilename));
	}
	return 0;
}

/* -------------------------------------------------------------------------- */
#define JP2_RFC3745_MAGIC "\x00\x00\x00\x0c\x6a\x50\x20\x20\x0d\x0a\x87\x0a"
#define JP2_MAGIC "\x0d\x0a\x87\x0a"
/* position 45: "\xff\x52" */
#define J2K_CODESTREAM_MAGIC "\xff\x4f\xff\x51"

static int infile_format(const char *fname)
{
	FILE *reader;
	const char *s, *magic_s;
	int ext_format, magic_format;
	unsigned char buf[12];
	unsigned int l_nb_read;

	reader = fopen(fname, "rb");

	if (reader == NULL)
		return -1;

	memset(buf, 0, 12);
	l_nb_read = fread(buf, 1, 12, reader);
	fclose(reader);
	if (l_nb_read != 12)
		return -1;



	ext_format = get_file_format(fname);

	if (ext_format == JPT_CFMT)
		return JPT_CFMT;

	if (memcmp(buf, JP2_RFC3745_MAGIC, 12) == 0 || memcmp(buf, JP2_MAGIC, 4) == 0) {
		magic_format = JP2_CFMT;
		magic_s = ".jp2";
	}
	else if (memcmp(buf, J2K_CODESTREAM_MAGIC, 4) == 0) {
		magic_format = J2K_CFMT;
		magic_s = ".j2k or .jpc or .j2c";
	}
	else
		return -1;

	if (magic_format == ext_format)
		return ext_format;

	s = fname + strlen(fname) - 4;

	fputs("\n===========================================\n", stderr);
	fprintf(stderr, "The extension of this file is incorrect.\n"
					"FOUND %s. SHOULD BE %s\n", s, magic_s);
	fputs("===========================================\n", stderr);

	return magic_format;
}

/* -------------------------------------------------------------------------- */
/**
 * Parse the command line
 */
/* -------------------------------------------------------------------------- */
int parse_cmdline_decoder(int argc, char **argv, opj_dparameters_t *parameters,img_fol_t *img_fol, char *indexfilename) {
	/* parse the command line */
	int totlen, c;
	opj_option_t long_option[]={
		{"ImgDir",REQ_ARG, NULL ,'y'},
		{"OutFor",REQ_ARG, NULL ,'O'},
	};

	const char optlist[] = "i:o:r:l:x:d:t:"

/* UniPG>> */
#ifdef USE_JPWL
					"W:"
#endif /* USE_JPWL */
/* <<UniPG */
			"h"		;
	totlen=sizeof(long_option);
	img_fol->set_out_format = 0;
	do {
		c = opj_getopt_long(argc, argv,optlist,long_option,totlen);
		if (c == -1)
			break;
		switch (c) {
			case 'i':			/* input file */
			{
				char *infile = opj_optarg;
				parameters->decod_format = infile_format(infile);
				switch(parameters->decod_format) {
					case J2K_CFMT:
						break;
					case JP2_CFMT:
						break;
					case JPT_CFMT:
						break;
					default:
						fprintf(stderr, 
							"!! Unrecognized format for infile : %s [accept only *.j2k, *.jp2, *.jpc or *.jpt] !!\n\n", 
							infile);
						return 1;
				}
				strncpy(parameters->infile, infile, sizeof(parameters->infile)-1);
			}
			break;
				
				/* ----------------------------------------------------- */

			case 'o':			/* output file */
			{
				char *outfile = opj_optarg;
				parameters->cod_format = get_file_format(outfile);
				switch(parameters->cod_format) {
					case PGX_DFMT:
						break;
					case PXM_DFMT:
						break;
					case BMP_DFMT:
						break;
					case TIF_DFMT:
						break;
					case RAW_DFMT:
						break;
					case RAWL_DFMT:
						break;
					case TGA_DFMT:
						break;
					case PNG_DFMT:
						break;
					default:
						fprintf(stderr, "Unknown output format image %s [only *.pnm, *.pgm, *.ppm, *.pgx, *.bmp, *.tif, *.raw or *.tga]!! \n", outfile);
						return 1;
				}
				strncpy(parameters->outfile, outfile, sizeof(parameters->outfile)-1);
			}
			break;
			
				/* ----------------------------------------------------- */

			case 'O':			/* output format */
			{
				char outformat[50];
				char *of = opj_optarg;
				sprintf(outformat,".%s",of);
				img_fol->set_out_format = 1;
				parameters->cod_format = get_file_format(outformat);
				switch(parameters->cod_format) {
					case PGX_DFMT:
						img_fol->out_format = "pgx";
						break;
					case PXM_DFMT:
						img_fol->out_format = "ppm";
						break;
					case BMP_DFMT:
						img_fol->out_format = "bmp";
						break;
					case TIF_DFMT:
						img_fol->out_format = "tif";
						break;
					case RAW_DFMT:
						img_fol->out_format = "raw";
						break;
					case RAWL_DFMT:
						img_fol->out_format = "rawl";
						break;
					case TGA_DFMT:
						img_fol->out_format = "raw";
						break;
					case PNG_DFMT:
						img_fol->out_format = "png";
						break;
					default:
						fprintf(stderr, "Unknown output format image %s [only *.pnm, *.pgm, *.ppm, *.pgx, *.bmp, *.tif, *.raw or *.tga]!! \n", outformat);
						return 1;
						break;
				}
			}
			break;

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


			case 'r':		/* reduce option */
			{
				sscanf(opj_optarg, "%d", &parameters->cp_reduce);
			}
			break;
			
				/* ----------------------------------------------------- */
      

			case 'l':		/* layering option */
			{
				sscanf(opj_optarg, "%d", &parameters->cp_layer);
			}
			break;
			
				/* ----------------------------------------------------- */

			case 'h': 			/* display an help description */
				decode_help_display();
				return 1;				

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

			case 'y':			/* Image Directory path */
				{
					img_fol->imgdirpath = (char*)malloc(strlen(opj_optarg) + 1);
					strcpy(img_fol->imgdirpath,opj_optarg);
					img_fol->set_imgdir=1;
				}
				break;

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

			case 'd':     		/* Input decode ROI */
			{
				int size_optarg = (int)strlen(opj_optarg) + 1;
				char *ROI_values = (char*) malloc(size_optarg);
				ROI_values[0] = '\0';
				strncpy(ROI_values, opj_optarg, strlen(opj_optarg));
				ROI_values[strlen(opj_optarg)] = '\0';
				/*printf("ROI_values = %s [%d / %d]\n", ROI_values, strlen(ROI_values), size_optarg ); */
				parse_DA_values( ROI_values, &parameters->DA_x0, &parameters->DA_y0, &parameters->DA_x1, &parameters->DA_y1);

				free(ROI_values);
			}
			break;

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

			case 't':     		/* Input tile index */
			{
				sscanf(opj_optarg, "%d", &parameters->tile_index);
				parameters->nb_tile_to_decode = 1;
			}
			break;

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

			case 'x':			/* Creation of index file */
				{
					char *index = opj_optarg;
					strncpy(indexfilename, index, OPJ_PATH_LEN);
				}
				break;
				/* ----------------------------------------------------- */
				/* UniPG>> */
#ifdef USE_JPWL
			
			case 'W': 			/* activate JPWL correction */
			{
				char *token = NULL;

				token = strtok(opj_optarg, ",");
				while(token != NULL) {

					/* search expected number of components */
					if (*token == 'c') {

						static int compno;

						compno = JPWL_EXPECTED_COMPONENTS; /* predefined no. of components */

						if(sscanf(token, "c=%d", &compno) == 1) {
							/* Specified */
							if ((compno < 1) || (compno > 256)) {
								fprintf(stderr, "ERROR -> invalid number of components c = %d\n", compno);
								return 1;
							}
							parameters->jpwl_exp_comps = compno;

						} else if (!strcmp(token, "c")) {
							/* default */
							parameters->jpwl_exp_comps = compno; /* auto for default size */

						} else {
							fprintf(stderr, "ERROR -> invalid components specified = %s\n", token);
							return 1;
						};
					}

					/* search maximum number of tiles */
					if (*token == 't') {

						static int tileno;

						tileno = JPWL_MAXIMUM_TILES; /* maximum no. of tiles */

						if(sscanf(token, "t=%d", &tileno) == 1) {
							/* Specified */
							if ((tileno < 1) || (tileno > JPWL_MAXIMUM_TILES)) {
								fprintf(stderr, "ERROR -> invalid number of tiles t = %d\n", tileno);
								return 1;
							}
							parameters->jpwl_max_tiles = tileno;

						} else if (!strcmp(token, "t")) {
							/* default */
							parameters->jpwl_max_tiles = tileno; /* auto for default size */

						} else {
							fprintf(stderr, "ERROR -> invalid tiles specified = %s\n", token);
							return 1;
						};
					}

					/* next token or bust */
					token = strtok(NULL, ",");
				};
				parameters->jpwl_correct = OPJ_TRUE;
				fprintf(stdout, "JPWL correction capability activated\n");
				fprintf(stdout, "- expecting %d components\n", parameters->jpwl_exp_comps);
			}
			break;	
#endif /* USE_JPWL */
/* <<UniPG */            

				/* ----------------------------------------------------- */
			
			default:
				fprintf(stderr,"WARNING -> this option is not valid \"-%c %s\"\n",c, opj_optarg);
				break;
		}
	}while(c != -1);

	/* check for possible errors */
	if(img_fol->set_imgdir==1){
		if(!(parameters->infile[0]==0)){
			fprintf(stderr, "Error: options -ImgDir and -i cannot be used together !!\n");
			return 1;
		}
		if(img_fol->set_out_format == 0){
			fprintf(stderr, "Error: When -ImgDir is used, -OutFor <FORMAT> must be used !!\n");
			fprintf(stderr, "Only one format allowed! Valid format PGM, PPM, PNM, PGX, BMP, TIF, RAW and TGA!!\n");
			return 1;
		}
		if(!((parameters->outfile[0] == 0))){
			fprintf(stderr, "Error: options -ImgDir and -o cannot be used together !!\n");
			return 1;
		}
	}else{
		if((parameters->infile[0] == 0) || (parameters->outfile[0] == 0)) {
			fprintf(stderr, "Example: %s -i image.j2k -o image.pgm\n",argv[0]);
			fprintf(stderr, "    Try: %s -h\n",argv[0]);
			return 1;
		}
	}

	return 0;
}

/* -------------------------------------------------------------------------- */
/**
 * Parse decoding area input values
 * separator = ","
 */
/* -------------------------------------------------------------------------- */
int parse_DA_values( char* inArg, unsigned int *DA_x0, unsigned int *DA_y0, unsigned int *DA_x1, unsigned int *DA_y1)
{
	int it = 0;
	int values[4];
	char delims[] = ",";
	char *result = NULL;
	result = strtok( inArg, delims );

	while( (result != NULL) && (it < 4 ) ) {
		values[it] = atoi(result);
		result = strtok( NULL, delims );
		it++;
	}

	if (it != 4) {
		return EXIT_FAILURE;
	}
	else{
		*DA_x0 = values[0]; *DA_y0 = values[1];
		*DA_x1 = values[2]; *DA_y1 = values[3];
		return EXIT_SUCCESS;
	}
}

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

/**
sample error callback expecting a FILE* client object
*/
void error_callback(const char *msg, void *client_data) {
	(void)client_data;
	fprintf(stdout, "[ERROR] %s", msg);
}
/**
sample warning callback expecting a FILE* client object
*/
void warning_callback(const char *msg, void *client_data) {
	(void)client_data;
	fprintf(stdout, "[WARNING] %s", msg);
}
/**
sample debug callback expecting no client object
*/
void info_callback(const char *msg, void *client_data) {
	(void)client_data;
	fprintf(stdout, "[INFO] %s", msg);
}

/* -------------------------------------------------------------------------- */
/**
 * J2K_TO_IMAGE MAIN
 */
/* -------------------------------------------------------------------------- */
int main(int argc, char **argv)
{
	FILE *fsrc = NULL;

	opj_dparameters_t parameters;			/* decompression parameters */
	opj_image_t* image = NULL;
	opj_stream_t *l_stream = NULL;				/* Stream */
	opj_codec_t* l_codec = NULL;				/* Handle to a decompressor */
	opj_codestream_index_t* cstr_index = NULL;

	char indexfilename[OPJ_PATH_LEN];	/* index file name */

	OPJ_INT32 num_images, imageno;
	img_fol_t img_fol;
	dircnt_t *dirptr = NULL;

	/* set decoding parameters to default values */
	opj_set_default_decoder_parameters(&parameters);

	/* FIXME Initialize indexfilename and img_fol */
	*indexfilename = 0;

	/* Initialize img_fol */
	memset(&img_fol,0,sizeof(img_fol_t));

	/* parse input and get user encoding parameters */
	if(parse_cmdline_decoder(argc, argv, &parameters,&img_fol, indexfilename) == 1) {
		return EXIT_FAILURE;
	}

	/* Initialize reading of directory */
	if(img_fol.set_imgdir==1){	
		int it_image;
		num_images=get_num_images(img_fol.imgdirpath);

		dirptr=(dircnt_t*)malloc(sizeof(dircnt_t));
		if(dirptr){
			dirptr->filename_buf = (char*)malloc(num_images*OPJ_PATH_LEN*sizeof(char));	/* Stores at max 10 image file names*/
			dirptr->filename = (char**) malloc(num_images*sizeof(char*));

			if(!dirptr->filename_buf){
				return EXIT_FAILURE;
			}
			for(it_image=0;it_image<num_images;it_image++){
				dirptr->filename[it_image] = dirptr->filename_buf + it_image*OPJ_PATH_LEN;
			}
		}
		if(load_images(dirptr,img_fol.imgdirpath)==1){
			return EXIT_FAILURE;
		}
		if (num_images==0){
			fprintf(stdout,"Folder is empty\n");
			return EXIT_FAILURE;
		}
	}else{
		num_images=1;
	}

	/*Decoding image one by one*/
	for(imageno = 0; imageno < num_images ; imageno++)	{

		fprintf(stderr,"\n");

		if(img_fol.set_imgdir==1){
			if (get_next_file(imageno, dirptr,&img_fol, &parameters)) {
				fprintf(stderr,"skipping file...\n");
				continue;
			}
		}

		/* read the input file and put it in memory */
		/* ---------------------------------------- */
		fsrc = fopen(parameters.infile, "rb");
		if (!fsrc) {
			fprintf(stderr, "ERROR -> failed to open %s for reading\n", parameters.infile);
			return EXIT_FAILURE;
		}

		l_stream = opj_stream_create_default_file_stream(fsrc,1);
		if (!l_stream){
			fclose(fsrc);
			fprintf(stderr, "ERROR -> failed to create the stream from the file\n");
			return EXIT_FAILURE;
		}

		/* decode the JPEG2000 stream */
		/* ---------------------- */

		switch(parameters.decod_format) {
			case J2K_CFMT:	/* JPEG-2000 codestream */
			{
				/* Get a decoder handle */
				l_codec = opj_create_decompress_v2(CODEC_J2K);
				break;
			}
			case JP2_CFMT:	/* JPEG 2000 compressed image data */
			{
				/* Get a decoder handle */
				l_codec = opj_create_decompress_v2(CODEC_JP2);
				break;
			}
			case JPT_CFMT:	/* JPEG 2000, JPIP */
			{
				/* Get a decoder handle */
				l_codec = opj_create_decompress_v2(CODEC_JPT);
				break;
			}
			default:
				fprintf(stderr, "skipping file..\n");
				opj_stream_destroy(l_stream);
				continue;
		}

		/* catch events using our callbacks and give a local context */		
		opj_set_info_handler(l_codec, info_callback,00);
		opj_set_warning_handler(l_codec, warning_callback,00);
		opj_set_error_handler(l_codec, error_callback,00);

		/* Setup the decoder decoding parameters using user parameters */
		if ( !opj_setup_decoder_v2(l_codec, &parameters) ){
			fprintf(stderr, "ERROR -> j2k_dump: failed to setup the decoder\n");
			opj_stream_destroy(l_stream);
			fclose(fsrc);
			opj_destroy_codec(l_codec);
			return EXIT_FAILURE;
		}


		/* Read the main header of the codestream and if necessary the JP2 boxes*/
		if(! opj_read_header(l_stream, l_codec, &image)){
			fprintf(stderr, "ERROR -> j2k_to_image: failed to read the header\n");
			opj_stream_destroy(l_stream);
			fclose(fsrc);
			opj_destroy_codec(l_codec);
			opj_image_destroy(image);
			return EXIT_FAILURE;
		}

		if (!parameters.nb_tile_to_decode) {
			// Optional if you want decode the entire image
			if (!opj_set_decode_area(l_codec, image, parameters.DA_x0,
					parameters.DA_y0, parameters.DA_x1, parameters.DA_y1)){
				fprintf(stderr,	"ERROR -> j2k_to_image: failed to set the decoded area\n");
				opj_stream_destroy(l_stream);
				opj_destroy_codec(l_codec);
				opj_image_destroy(image);
				fclose(fsrc);
				return EXIT_FAILURE;
			}

			/* Get the decoded image */
			if (!(opj_decode_v2(l_codec, l_stream, image) && opj_end_decompress(l_codec,	l_stream))) {
				fprintf(stderr,"ERROR -> j2k_to_image: failed to decode image!\n");
				opj_destroy_codec(l_codec);
				opj_stream_destroy(l_stream);
				opj_image_destroy(image);
				fclose(fsrc);
				return EXIT_FAILURE;
			}
		}
		else {

			// It is just here to illustrate how to use the resolution after set parameters
			/*if (!opj_set_decoded_resolution_factor(l_codec, 5)) {
				fprintf(stderr, "ERROR -> j2k_to_image: failed to set the resolution factor tile!\n");
				opj_destroy_codec(l_codec);
				opj_stream_destroy(l_stream);
				opj_image_destroy(image);
				fclose(fsrc);
				return EXIT_FAILURE;
			}*/

			if (!opj_get_decoded_tile(l_codec, l_stream, image, parameters.tile_index)) {
				fprintf(stderr, "ERROR -> j2k_to_image: failed to decode tile!\n");
				opj_destroy_codec(l_codec);
				opj_stream_destroy(l_stream);
				opj_image_destroy(image);
				fclose(fsrc);
				return EXIT_FAILURE;
			}
			fprintf(stdout, "tile %d is decoded!\n\n", parameters.tile_index);
		}

		/* Close the byte stream */
		opj_stream_destroy(l_stream);
		fclose(fsrc);

		if(image->color_space == CLRSPC_SYCC){
			color_sycc_to_rgb(image); /* FIXME */
		}

		if(image->icc_profile_buf) {
#if defined(HAVE_LIBLCMS1) || defined(HAVE_LIBLCMS2)
			color_apply_icc_profile(image); /* FIXME */
#endif
			free(image->icc_profile_buf);
			image->icc_profile_buf = NULL; image->icc_profile_len = 0;
		}

		/* create output image */
		/* ------------------- */
		switch (parameters.cod_format) {
		case PXM_DFMT:			/* PNM PGM PPM */
			if (imagetopnm(image, parameters.outfile)) {
				fprintf(stdout,"Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Generated Outfile %s\n",parameters.outfile);
			}
			break;

		case PGX_DFMT:			/* PGX */
			if(imagetopgx(image, parameters.outfile)){
				fprintf(stdout,"Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Generated Outfile %s\n",parameters.outfile);
			}
			break;

		case BMP_DFMT:			/* BMP */
			if(imagetobmp(image, parameters.outfile)){
				fprintf(stdout,"Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Generated Outfile %s\n",parameters.outfile);
			}
			break;
#ifdef HAVE_LIBTIFF
		case TIF_DFMT:			/* TIFF */
			if(imagetotif(image, parameters.outfile)){
				fprintf(stdout,"Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Generated Outfile %s\n",parameters.outfile);
			}
			break;
#endif /* HAVE_LIBTIFF */
		case RAW_DFMT:			/* RAW */
			if(imagetoraw(image, parameters.outfile)){
				fprintf(stdout,"Error generating raw file. Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Successfully generated Outfile %s\n",parameters.outfile);
			}
			break;

		case RAWL_DFMT:			/* RAWL */
			if(imagetorawl(image, parameters.outfile)){
				fprintf(stdout,"Error generating rawl file. Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Successfully generated Outfile %s\n",parameters.outfile);
			}
			break;

		case TGA_DFMT:			/* TGA */
			if(imagetotga(image, parameters.outfile)){
				fprintf(stdout,"Error generating tga file. Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Successfully generated Outfile %s\n",parameters.outfile);
			}
			break;
#ifdef HAVE_LIBPNG
		case PNG_DFMT:			/* PNG */
			if(imagetopng(image, parameters.outfile)){
				fprintf(stdout,"Error generating png file. Outfile %s not generated\n",parameters.outfile);
			}
			else {
				fprintf(stdout,"Successfully generated Outfile %s\n",parameters.outfile);
			}
			break;
#endif /* HAVE_LIBPNG */
/* Can happen if output file is TIFF or PNG
 * and HAVE_LIBTIF or HAVE_LIBPNG is undefined
*/
			default:
				fprintf(stderr,"Outfile %s not generated\n",parameters.outfile);
		}

		/* free remaining structures */
		if (l_codec) {
			opj_destroy_codec(l_codec);
		}


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

		/* destroy the codestream index */
		opj_destroy_cstr_index(&cstr_index);

	}
	return EXIT_SUCCESS;
}
/*end main*/