/*
 * Copyright (c) 2008, Jerome Fimes, Communications & Systemes <jerome.fimes@c-s.fr>
 * 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.
 */

#define USE_OPJ_DEPRECATED
/* set this macro to enable profiling for the given test */
/* warning : in order to be effective, openjpeg must have been built with profiling enabled !! */
//#define _PROFILE
#include "openjpeg.h"
#include "FreeImage.h"
#ifdef WIN32
#include <malloc.h>
#endif
#include <string.h>
#include <stdlib.h>

#define NB_EXTENSIONS 2
/* -------------------------------------------------------------------------- */
struct opj_format
{
	const char * m_extension;
	OPJ_CODEC_FORMAT m_format;
};

const struct opj_format c_extensions[] = 
{
	{".j2k",CODEC_J2K},
	{".jp2",CODEC_JP2}
};

OPJ_CODEC_FORMAT get_format (const char * l_file_name)
{
	OPJ_INT32 i;
	const struct opj_format * l_current = c_extensions;
	for
		(i=0;i<NB_EXTENSIONS;++i)
	{
		if
			(! memcmp(l_current->m_extension,l_file_name + strlen(l_file_name)-4,4))
		{
			return l_current->m_format;
		}
		++l_current;
	}
	return CODEC_UNKNOWN;
}

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

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

int main (int argc,char * argv [])
{
	opj_dparameters_t l_param;
	opj_codec_t * l_codec;
	opj_image_t * l_image;
	FILE * l_file;
	opj_stream_t * l_stream;
	OPJ_UINT32 l_data_size;
	OPJ_UINT32 l_max_data_size = 1000;
	OPJ_UINT32 l_tile_index;
	OPJ_BYTE * l_data = (OPJ_BYTE *) malloc(1000);
	bool l_go_on = true;
	OPJ_INT32 l_tile_x0,l_tile_y0;
	OPJ_UINT32 l_tile_width,l_tile_height,l_nb_tiles_x,l_nb_tiles_y,l_nb_comps;
	OPJ_INT32 l_current_tile_x0,l_current_tile_y0,l_current_tile_x1,l_current_tile_y1;
	char * l_input_file,* l_output_file;
	OPJ_INT32 l_min_x, l_min_y, l_max_x, l_max_y;
	OPJ_CODEC_FORMAT l_codec_format;
	FIBITMAP * l_bitmap;
	unsigned char * l_image_data;
	OPJ_INT32 l_req_x,l_req_y;
	OPJ_UINT32 l_image_width,l_image_height,l_image_boundary,l_offset;
	unsigned char * l_tile_ptr [3];
	unsigned char * l_line_ptr, * l_current_ptr;
	OPJ_UINT32 i,j;

	if
		(argc != 8)
	{
		printf("usage : ... \n");
		return 1;
	}

	PROFINIT();
	FreeImage_Initialise(0);

	l_input_file = argv[1];
	l_output_file = argv[2];
	l_min_x = atoi(argv[3]);
	l_min_y = atoi(argv[4]);
	l_max_x = atoi(argv[5]);
	l_max_y = atoi(argv[6]);

	l_codec_format = get_format(l_input_file);

	if
		((! l_data) || (l_codec_format == CODEC_UNKNOWN))
	{
		return 1;
	}

	
	opj_set_default_decoder_parameters(&l_param);

	/** you may here add custom decoding parameters */
	/* do not use layer decoding limitations */
	l_param.cp_layer = 0;

	/* do not use resolutions reductions */
	l_param.cp_reduce = atoi(argv[7]);

	/* to decode only a part of the image data */
	//opj_restrict_decoding(&l_param,0,0,1000,1000);
	
	l_codec = opj_create_decompress(l_codec_format);
	if
		(! l_codec)
	{
		free(l_data);
		return 1;
	}

	/* 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);
	opj_restrict_decoding(&l_param,l_min_x, l_min_y, l_max_x, l_max_y);

	if
		(! opj_setup_decoder(l_codec,&l_param))
	{
		free(l_data);
		opj_destroy_codec(l_codec);
		return 1;
	}
	
	l_file = fopen(l_input_file,"rb");
	if
		(! l_file)
	{
		fprintf(stdout, "Error opening input file\n");
		free(l_data);
		opj_destroy_codec(l_codec);
		return 1;
	}

	l_stream = opj_stream_create_default_file_stream(l_file,true);

	if
		(! opj_read_header(l_codec,
							&l_image,
							&l_tile_x0,
							&l_tile_y0,
							&l_tile_width,
							&l_tile_height,
							&l_nb_tiles_x,
							&l_nb_tiles_y,
							l_stream))
	{
		free(l_data);
		opj_stream_destroy(l_stream);
		fclose(l_file);
		opj_destroy_codec(l_codec);
		return 1;
	}
	
	if
		((l_tile_x0 != 0) || (l_tile_y0 != 0))
	{
		free(l_data);
		opj_stream_destroy(l_stream);
		fclose(l_file);
		opj_destroy_codec(l_codec);
		return 1;
	}

	l_min_x -= l_min_x % l_tile_width;
	l_min_y -= l_min_y % l_tile_height;
	
	l_req_x = l_max_x % l_tile_width;
	if
		(l_req_x)
	{
		l_max_x += l_tile_width - l_req_x;
	}

	l_req_y = l_max_y % l_tile_height;
	if
		(l_req_y)
	{
		l_max_y += l_tile_height - l_req_y;
	}

	l_min_x = l_min_x < l_image->x0 ? l_image->x0 : l_min_x;
	l_min_y = l_min_y < l_image->y0 ? l_image->y0 : l_min_y;
	l_max_x = l_max_x > l_image->x1 ? l_image->x1 : l_max_x;
	l_max_y = l_max_y > l_image->y1 ? l_image->y1 : l_max_y;

	l_image_width = (l_max_x - l_min_x + (1 << l_param.cp_reduce) - 1) >> l_param.cp_reduce;
	l_image_height = (l_max_y - l_min_y + (1 << l_param.cp_reduce) - 1) >> l_param.cp_reduce;
	l_image_boundary = 3 * l_image_width;
	l_req_x = l_image_boundary % 4;
	if
		(l_req_x)
	{
		l_image_boundary += 4-l_req_x;
	}

	l_bitmap = FreeImage_Allocate(l_image_width, l_image_height, 24, 0, 0, 0);
	l_image_data = FreeImage_GetBits(l_bitmap);

	while
		(l_go_on)
	{
		if
			(! opj_read_tile_header(
						l_codec,
						&l_tile_index,
						&l_data_size,
						&l_current_tile_x0,
						&l_current_tile_y0,
						&l_current_tile_x1,
						&l_current_tile_y1,
						&l_nb_comps,
						&l_go_on,
						l_stream))
		{
			free(l_data);
			opj_stream_destroy(l_stream);
			fclose(l_file);
			opj_destroy_codec(l_codec);
			opj_image_destroy(l_image);
			return 1;
		}
		if
			(l_go_on)
		{
			if
				(l_data_size > l_max_data_size)
			{
				l_data = (OPJ_BYTE *) realloc(l_data,l_data_size);
				if
					(! l_data)
				{
					opj_stream_destroy(l_stream);
					fclose(l_file);
					opj_destroy_codec(l_codec);
					opj_image_destroy(l_image);
					return 1;
				}
				l_max_data_size = l_data_size;
			}

			if
				(! opj_decode_tile_data(l_codec,l_tile_index,l_data,l_data_size,l_stream))
			{
				free(l_data);
				opj_stream_destroy(l_stream);
				fclose(l_file);
				opj_destroy_codec(l_codec);
				opj_image_destroy(l_image);
				return 1;
			}
			/** now should inspect image to know the reduction factor and then how to behave with data */
			l_offset = (((l_max_y - l_current_tile_y0 + (1 << l_param.cp_reduce) - 1)>>l_param.cp_reduce) - 1) * l_image_boundary + ((l_current_tile_x0 - l_min_x + (1 << l_param.cp_reduce) - 1)>> l_param.cp_reduce )* 3;
			
			l_tile_width = (l_current_tile_x1 - l_current_tile_x0 + (1 << l_param.cp_reduce) - 1)>>l_param.cp_reduce;
			l_tile_height = (l_current_tile_y1 - l_current_tile_y0 + (1 << l_param.cp_reduce) - 1)>>l_param.cp_reduce;
			l_tile_ptr[0] = l_data + 2 * l_tile_width * l_tile_height;
			l_tile_ptr[1] = l_data + l_tile_width * l_tile_height;
			l_tile_ptr[2] = l_data ;
			l_line_ptr = l_image_data + l_offset;
			for
				(i=0;i<l_tile_width;++i)
			{
				l_current_ptr = l_line_ptr;
				for
					(j=0;j<l_tile_height;++j)
				{
					*(l_current_ptr++) = *(l_tile_ptr[0]++);
					*(l_current_ptr++) = *(l_tile_ptr[1]++);
					*(l_current_ptr++) = *(l_tile_ptr[2]++);
				}
				l_line_ptr -= l_image_boundary;
			}
		}
	}
	if
		(! opj_end_decompress(l_codec,l_stream))
	{
		free(l_data);
		opj_stream_destroy(l_stream);
		fclose(l_file);
		opj_destroy_codec(l_codec);
		opj_image_destroy(l_image);
		return 1;
	}
	free(l_data);
	opj_stream_destroy(l_stream);
	fclose(l_file);
	opj_destroy_codec(l_codec);
	opj_image_destroy(l_image);

	// Print profiling
	PROFPRINT();
	FreeImage_Save(0,l_bitmap,l_output_file,0);
	FreeImage_Unload(l_bitmap);
	
	return 0;
}