path: root/source/blender/imbuf/intern/jp2.c

/**
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Campbell Barton
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifdef WITH_OPENJPEG

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_math.h"

#include "imbuf.h"

#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"
#include "IMB_allocimbuf.h"
#include "IMB_filetype.h"

#include "openjpeg.h"

#define JP2_FILEHEADER_SIZE 14

static char JP2_HEAD[]= {0x0, 0x0, 0x0, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A};

/* We only need this because of how the presets are set */
typedef struct img_folder{
	/** The directory path of the folder containing input images*/
	char *imgdirpath;
	/** Output format*/
	char *out_format;
	/** Enable option*/
	char set_imgdir;
	/** Enable Cod Format for output*/
	char set_out_format;
	/** User specified rate stored in case of cinema option*/
	float *rates;
}img_fol_t;

static int checkj2p(unsigned char *mem) /* J2K_CFMT */
{
	return memcmp(JP2_HEAD, mem, 12) ? 0 : 1;
}

int imb_is_a_jp2(unsigned char *buf)
{	
	return checkj2p(buf);
}


/**
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 no client object
*/
void info_callback(const char *msg, void *client_data) {
	(void)client_data;
	fprintf(stdout, "[INFO] %s", msg);
}



struct ImBuf *imb_jp2_decode(unsigned char *mem, size_t size, int flags)
{
	struct ImBuf *ibuf = 0;
	int use_float = 0; /* for precision higher then 8 use float */
	
	long signed_offsets[4] = {0,0,0,0};
	int float_divs[4];
	
	int index;
	
	int w, h, depth;
	
	opj_dparameters_t parameters;	/* decompression parameters */
	
	opj_event_mgr_t event_mgr;		/* event manager */
	opj_image_t *image = NULL;
	
	int i;
	
	opj_dinfo_t* dinfo = NULL;	/* handle to a decompressor */
	opj_cio_t *cio = NULL;

	if (checkj2p(mem) == 0) return(0);

	/* configure the event callbacks (not required) */
	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 decoding parameters to default values */
	opj_set_default_decoder_parameters(&parameters);


	/* JPEG 2000 compressed image data */

	/* get a decoder handle */
	dinfo = opj_create_decompress(CODEC_JP2);

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

	/* setup the decoder decoding parameters using the current image and user parameters */
	opj_setup_decoder(dinfo, &parameters);

	/* open a byte stream */
	cio = opj_cio_open((opj_common_ptr)dinfo, mem, size);

	/* decode the stream and fill the image structure */
	image = opj_decode(dinfo, cio);
	
	if(!image) {
		fprintf(stderr, "ERROR -> j2k_to_image: failed to decode image!\n");
		opj_destroy_decompress(dinfo);
		opj_cio_close(cio);
		return NULL;
	}

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


	if((image->numcomps * image->x1 * image->y1) == 0)
	{
		fprintf(stderr,"\nError: invalid raw image parameters\n");
		return NULL;
	}
	
	w = image->comps[0].w;
	h = image->comps[0].h;
	
	switch (image->numcomps) {
	case 1: /* Greyscale */
	case 3: /* Color */
		depth= 24; 
		break;
	default: /* 2 or 4 - Greyscale or Color + alpha */
		depth= 32; /* greyscale + alpha */
		break;
	}
	
	
	i = image->numcomps;
	if (i>4) i= 4;
	
	while (i) {
		i--;
		
		if (image->comps[i].prec > 8)
			use_float = 1;
		
		if (image->comps[i].sgnd)
			signed_offsets[i]=  1 << (image->comps[i].prec - 1); 
		
		/* only needed for float images but dosnt hurt to calc this */
		float_divs[i]= (1<<image->comps[i].prec)-1;
	}
	
	ibuf= IMB_allocImBuf(w, h, depth, use_float ? IB_rectfloat : IB_rect);
	
	if (ibuf==NULL) {
		if(dinfo)
			opj_destroy_decompress(dinfo);
		return NULL;
	}
	
	ibuf->ftype = JP2;
	
	if (use_float) {
		float *rect_float= ibuf->rect_float;

		if (image->numcomps < 3) {
			/* greyscale 12bits+ */
			for (i = 0; i < w * h; i++, rect_float+=4) {
				index = w * h - ((i) / (w) + 1) * w + (i) % (w);
				
				rect_float[0]= rect_float[1]= rect_float[2]= (float)(image->comps[0].data[index] + signed_offsets[0]) / float_divs[0];
				
				if (image->numcomps == 2)
					rect_float[3]= (image->comps[1].data[index] + signed_offsets[1]) / float_divs[1];
				else
					rect_float[3]= 1.0f;
			}
		} else {
			/* rgb or rgba 12bits+ */
			for (i = 0; i < w * h; i++, rect_float+=4) {
				index = w * h - ((i) / (w) + 1) * w + (i) % (w);
				
				rect_float[0]= (float)(image->comps[0].data[index] + signed_offsets[0]) / float_divs[0];
				rect_float[1]= (float)(image->comps[1].data[index] + signed_offsets[1]) / float_divs[1];
				rect_float[2]= (float)(image->comps[2].data[index] + signed_offsets[2]) / float_divs[2];
				
				if (image->numcomps >= 4)
					rect_float[3]= (float)(image->comps[3].data[index] + signed_offsets[3]) / float_divs[3];
				else
					rect_float[3]= 1.0f;
			}
		}
		
	} else {
		unsigned char *rect= (unsigned char *)ibuf->rect;

		if (image->numcomps < 3) {
			/* greyscale */
			for (i = 0; i < w * h; i++, rect+=4) {
				index = w * h - ((i) / (w) + 1) * w + (i) % (w);
				
				rect[0]= rect[1]= rect[2]= (image->comps[0].data[index] + signed_offsets[0]);
				
				if (image->numcomps == 2)
					rect[3]= image->comps[1].data[index] + signed_offsets[1];
				else
					rect[3]= 255;
			}
		} else {
			/* 8bit rgb or rgba */
			for (i = 0; i < w * h; i++, rect+=4) {
				int index = w * h - ((i) / (w) + 1) * w + (i) % (w);
				
				rect[0]= image->comps[0].data[index] + signed_offsets[0];
				rect[1]= image->comps[1].data[index] + signed_offsets[1];
				rect[2]= image->comps[2].data[index] + signed_offsets[2];
				
				if (image->numcomps >= 4)
					rect[3]= image->comps[3].data[index] + signed_offsets[3];
				else
					rect[3]= 255;
			}
		}
	}
	
	/* free remaining structures */
	if(dinfo) {
		opj_destroy_decompress(dinfo);
	}
	
	/* free image data structure */
	opj_image_destroy(image);
	
	if (flags & IB_rect) {
		IMB_rect_from_float(ibuf);
	}
	
	return(ibuf);
}

//static opj_image_t* rawtoimage(const char *filename, opj_cparameters_t *parameters, raw_cparameters_t *raw_cp) {
/* prec can be 8, 12, 16 */

#define UPSAMPLE_8_TO_12(_val) ((_val<<4) | (_val & ((1<<4)-1)))
#define UPSAMPLE_8_TO_16(_val) ((_val<<8)+_val)

#define DOWNSAMPLE_FLOAT_TO_8BIT(_val)	(_val)<=0.0f?0: ((_val)>=1.0f?255: (int)(255.0f*(_val)))
#define DOWNSAMPLE_FLOAT_TO_12BIT(_val)	(_val)<=0.0f?0: ((_val)>=1.0f?4095: (int)(4095.0f*(_val)))
#define DOWNSAMPLE_FLOAT_TO_16BIT(_val)	(_val)<=0.0f?0: ((_val)>=1.0f?65535: (int)(65535.0f*(_val)))


/*
2048x1080 (2K) at 24 fps or 48 fps, or 4096x2160 (4K) at 24 fps; 3x12 bits per pixel, XYZ color space

	* In 2K, for Scope (2.39:1) presentation 2048x858 pixels of the imager is used
	* In 2K, for Flat (1.85:1) presentation 1998x1080 pixels of the imager is used
*/

/* ****************************** COPIED FROM image_to_j2k.c */

/* ----------------------------------------------------------------------- */
#define CINEMA_24_CS 1302083	/*Codestream length for 24fps*/
#define CINEMA_48_CS 651041		/*Codestream length for 48fps*/
#define COMP_24_CS 1041666		/*Maximum size per color component for 2K & 4K @ 24fps*/
#define COMP_48_CS 520833		/*Maximum size per color component for 2K @ 48fps*/


static int initialise_4K_poc(opj_poc_t *POC, int numres){
	POC[0].tile  = 1; 
	POC[0].resno0  = 0; 
	POC[0].compno0 = 0;
	POC[0].layno1  = 1;
	POC[0].resno1  = numres-1;
	POC[0].compno1 = 3;
	POC[0].prg1 = CPRL;
	POC[1].tile  = 1;
	POC[1].resno0  = numres-1; 
	POC[1].compno0 = 0;
	POC[1].layno1  = 1;
	POC[1].resno1  = numres;
	POC[1].compno1 = 3;
	POC[1].prg1 = CPRL;
	return 2;
}

void cinema_parameters(opj_cparameters_t *parameters){
	parameters->tile_size_on = false;
	parameters->cp_tdx=1;
	parameters->cp_tdy=1;
	
	/*Tile part*/
	parameters->tp_flag = 'C';
	parameters->tp_on = 1;

	/*Tile and Image shall be at (0,0)*/
	parameters->cp_tx0 = 0;
	parameters->cp_ty0 = 0;
	parameters->image_offset_x0 = 0;
	parameters->image_offset_y0 = 0;

	/*Codeblock size= 32*32*/
	parameters->cblockw_init = 32;	
	parameters->cblockh_init = 32;
	parameters->csty |= 0x01;

	/*The progression order shall be CPRL*/
	parameters->prog_order = CPRL;

	/* No ROI */
	parameters->roi_compno = -1;

	parameters->subsampling_dx = 1;		parameters->subsampling_dy = 1;

	/* 9-7 transform */
	parameters->irreversible = 1;

}

void cinema_setup_encoder(opj_cparameters_t *parameters,opj_image_t *image, img_fol_t *img_fol){
	int i;
	float temp_rate;

	switch (parameters->cp_cinema){
	case CINEMA2K_24:
	case CINEMA2K_48:
		if(parameters->numresolution > 6){
			parameters->numresolution = 6;
		}
		if (!((image->comps[0].w == 2048) || (image->comps[0].h == 1080))){
			fprintf(stdout,"Image coordinates %d x %d is not 2K compliant.\nJPEG Digital Cinema Profile-3 "
				"(2K profile) compliance requires that at least one of coordinates match 2048 x 1080\n",
				image->comps[0].w,image->comps[0].h);
			parameters->cp_rsiz = STD_RSIZ;
		}
	break;
	
	case CINEMA4K_24:
		if(parameters->numresolution < 1){
				parameters->numresolution = 1;
			}else if(parameters->numresolution > 7){
				parameters->numresolution = 7;
			}
		if (!((image->comps[0].w == 4096) || (image->comps[0].h == 2160))){
			fprintf(stdout,"Image coordinates %d x %d is not 4K compliant.\nJPEG Digital Cinema Profile-4" 
				"(4K profile) compliance requires that at least one of coordinates match 4096 x 2160\n",
				image->comps[0].w,image->comps[0].h);
			parameters->cp_rsiz = STD_RSIZ;
		}
		parameters->numpocs = initialise_4K_poc(parameters->POC,parameters->numresolution);
		break;
	case OFF:
		/* do nothing */
		break;
	}

	switch (parameters->cp_cinema){
	case CINEMA2K_24:
	case CINEMA4K_24:
		for(i=0 ; i<parameters->tcp_numlayers ; i++){
			temp_rate = 0 ;
			if (img_fol->rates[i]== 0){
				parameters->tcp_rates[0]= ((float) (image->numcomps * image->comps[0].w * image->comps[0].h * image->comps[0].prec))/ 
					(CINEMA_24_CS * 8 * image->comps[0].dx * image->comps[0].dy);
			}else{
				temp_rate =((float) (image->numcomps * image->comps[0].w * image->comps[0].h * image->comps[0].prec))/ 
					(img_fol->rates[i] * 8 * image->comps[0].dx * image->comps[0].dy);
				if (temp_rate > CINEMA_24_CS ){
					parameters->tcp_rates[i]= ((float) (image->numcomps * image->comps[0].w * image->comps[0].h * image->comps[0].prec))/ 
						(CINEMA_24_CS * 8 * image->comps[0].dx * image->comps[0].dy);
				}else{
					parameters->tcp_rates[i]= img_fol->rates[i];
				}
			}
		}
		parameters->max_comp_size = COMP_24_CS;
		break;
		
	case CINEMA2K_48:
		for(i=0 ; i<parameters->tcp_numlayers ; i++){
			temp_rate = 0 ;
			if (img_fol->rates[i]== 0){
				parameters->tcp_rates[0]= ((float) (image->numcomps * image->comps[0].w * image->comps[0].h * image->comps[0].prec))/ 
					(CINEMA_48_CS * 8 * image->comps[0].dx * image->comps[0].dy);
			}else{
				temp_rate =((float) (image->numcomps * image->comps[0].w * image->comps[0].h * image->comps[0].prec))/ 
					(img_fol->rates[i] * 8 * image->comps[0].dx * image->comps[0].dy);
				if (temp_rate > CINEMA_48_CS ){
					parameters->tcp_rates[0]= ((float) (image->numcomps * image->comps[0].w * image->comps[0].h * image->comps[0].prec))/ 
						(CINEMA_48_CS * 8 * image->comps[0].dx * image->comps[0].dy);
				}else{
					parameters->tcp_rates[i]= img_fol->rates[i];
				}
			}
		}
		parameters->max_comp_size = COMP_48_CS;
		break;
	case OFF:
		/* do nothing */
		break;
	}
	parameters->cp_disto_alloc = 1;
}


static opj_image_t* ibuftoimage(ImBuf *ibuf, opj_cparameters_t *parameters) {
	
	unsigned char *rect;
	float *rect_float;
	
	int subsampling_dx = parameters->subsampling_dx;
	int subsampling_dy = parameters->subsampling_dy;
	

	int i, numcomps, w, h, prec;
	int x,y, y_row;
	OPJ_COLOR_SPACE color_space;
	opj_image_cmptparm_t cmptparm[4];	/* maximum of 4 components */
	opj_image_t * image = NULL;
	
	img_fol_t img_fol; /* only needed for cinema presets */
	memset(&img_fol,0,sizeof(img_fol_t));
	
	if (ibuf->ftype & JP2_CINE) {
		
		if (ibuf->x==4096 || ibuf->y==2160)
			parameters->cp_cinema= CINEMA4K_24;
		else {
			if (ibuf->ftype & JP2_CINE_48FPS) {
				parameters->cp_cinema= CINEMA2K_48;
			}
			else {
				parameters->cp_cinema= CINEMA2K_24;
			}
		}
		if (parameters->cp_cinema){
			img_fol.rates = (float*)MEM_mallocN(parameters->tcp_numlayers * sizeof(float), "jp2_rates");
			for(i=0; i< parameters->tcp_numlayers; i++){
				img_fol.rates[i] = parameters->tcp_rates[i];
			}
			cinema_parameters(parameters);
		}
		
		color_space= CLRSPC_SYCC;
		prec= 12;
		numcomps= 3;
	}
	else { 
		/* Get settings from the imbuf */
		color_space = (ibuf->ftype & JP2_YCC) ? CLRSPC_SYCC : CLRSPC_SRGB;
		
		if (ibuf->ftype & JP2_16BIT)		prec= 16;
		else if (ibuf->ftype & JP2_12BIT)	prec= 12;
		else 						prec= 8;
		
		/* 32bit images == alpha channel */
		/* grayscale not supported yet */
		numcomps= (ibuf->depth==32) ? 4 : 3;
	}
	
	w= ibuf->x;
	h= ibuf->y;
	
	
	/* initialize image components */
	memset(&cmptparm[0], 0, 4 * sizeof(opj_image_cmptparm_t));
	for(i = 0; i < numcomps; i++) {
		cmptparm[i].prec = prec;
		cmptparm[i].bpp = prec;
		cmptparm[i].sgnd = 0;
		cmptparm[i].dx = subsampling_dx;
		cmptparm[i].dy = subsampling_dy;
		cmptparm[i].w = w;
		cmptparm[i].h = h;
	}
	/* create the image */
	image = opj_image_create(numcomps, &cmptparm[0], color_space);
	if(!image) {
		printf("Error: opj_image_create() failed\n");
		return NULL;
	}

	/* set image offset and reference grid */
	image->x0 = parameters->image_offset_x0;
	image->y0 = parameters->image_offset_y0;
	image->x1 = parameters->image_offset_x0 + (w - 1) *	subsampling_dx + 1;
	image->y1 = parameters->image_offset_y0 + (h - 1) *	subsampling_dy + 1;
	
	/* set image data */
	rect = (unsigned char*) ibuf->rect;
	rect_float= ibuf->rect_float;
	
	if (rect_float && rect && prec==8) {
		/* No need to use the floating point buffer, just write the 8 bits from the char buffer */
		rect_float= NULL;
	}
	
	
	if (rect_float) {
		float rgb[3];
		
		switch (prec) {
		case 8: /* Convert blenders float color channels to 8,12 or 16bit ints */
			for(y=h-1; y>=0; y--) {
				y_row = y*w;
				for(x=0; x<w; x++, rect_float+=4) {
					i = y_row + x;
					
					if (ibuf->profile == IB_PROFILE_LINEAR_RGB)
						linearrgb_to_srgb_v3_v3(rgb, rect_float);
					else
						copy_v3_v3(rgb, rect_float);
				
					image->comps[0].data[i] = DOWNSAMPLE_FLOAT_TO_8BIT(rgb[0]);
					image->comps[1].data[i] = DOWNSAMPLE_FLOAT_TO_8BIT(rgb[1]);
					image->comps[2].data[i] = DOWNSAMPLE_FLOAT_TO_8BIT(rgb[2]);
					if (numcomps>3)
						image->comps[3].data[i] = DOWNSAMPLE_FLOAT_TO_8BIT(rect_float[3]);
				}
			}
			break;
			
		case 12:
			for(y=h-1; y>=0; y--) {
				y_row = y*w;
				for(x=0; x<w; x++, rect_float+=4) {
					i = y_row + x;
					
					if (ibuf->profile == IB_PROFILE_LINEAR_RGB)
						linearrgb_to_srgb_v3_v3(rgb, rect_float);
					else
						copy_v3_v3(rgb, rect_float);
				
					image->comps[0].data[i] = DOWNSAMPLE_FLOAT_TO_12BIT(rgb[0]);
					image->comps[1].data[i] = DOWNSAMPLE_FLOAT_TO_12BIT(rgb[1]);
					image->comps[2].data[i] = DOWNSAMPLE_FLOAT_TO_12BIT(rgb[2]);
					if (numcomps>3)
						image->comps[3].data[i] = DOWNSAMPLE_FLOAT_TO_12BIT(rect_float[3]);
				}
			}
			break;
		case 16:
			for(y=h-1; y>=0; y--) {
				y_row = y*w;
				for(x=0; x<w; x++, rect_float+=4) {
					i = y_row + x;
					
					if (ibuf->profile == IB_PROFILE_LINEAR_RGB)
						linearrgb_to_srgb_v3_v3(rgb, rect_float);
					else
						copy_v3_v3(rgb, rect_float);
				
					image->comps[0].data[i] = DOWNSAMPLE_FLOAT_TO_16BIT(rgb[0]);
					image->comps[1].data[i] = DOWNSAMPLE_FLOAT_TO_16BIT(rgb[1]);
					image->comps[2].data[i] = DOWNSAMPLE_FLOAT_TO_16BIT(rgb[2]);
					if (numcomps>3)
						image->comps[3].data[i] = DOWNSAMPLE_FLOAT_TO_16BIT(rect_float[3]);
				}
			}
			break;
		}
	} else {
		/* just use rect*/
		switch (prec) {
		case 8:
			for(y=h-1; y>=0; y--) {
				y_row = y*w;
				for(x=0; x<w; x++, rect+=4) {
					i = y_row + x;
				
					image->comps[0].data[i] = rect[0];
					image->comps[1].data[i] = rect[1];
					image->comps[2].data[i] = rect[2];
					if (numcomps>3)
						image->comps[3].data[i] = rect[3];
				}
			}
			break;
			
		case 12: /* Up Sampling, a bit pointless but best write the bit depth requested */
			for(y=h-1; y>=0; y--) {
				y_row = y*w;
				for(x=0; x<w; x++, rect+=4) {
					i = y_row + x;
				
					image->comps[0].data[i]= UPSAMPLE_8_TO_12(rect[0]);
					image->comps[1].data[i]= UPSAMPLE_8_TO_12(rect[1]);
					image->comps[2].data[i]= UPSAMPLE_8_TO_12(rect[2]);
					if (numcomps>3)
						image->comps[3].data[i]= UPSAMPLE_8_TO_12(rect[3]);
				}
			}
			break;
		case 16:
			for(y=h-1; y>=0; y--) {
				y_row = y*w;
				for(x=0; x<w; x++, rect+=4) {
					i = y_row + x;
				
					image->comps[0].data[i]= UPSAMPLE_8_TO_16(rect[0]);
					image->comps[1].data[i]= UPSAMPLE_8_TO_16(rect[1]);
					image->comps[2].data[i]= UPSAMPLE_8_TO_16(rect[2]);
					if (numcomps>3)
						image->comps[3].data[i]= UPSAMPLE_8_TO_16(rect[3]);
				}
			}
			break;
		}
	}
	
	/* Decide if MCT should be used */
	parameters->tcp_mct = image->numcomps == 3 ? 1 : 0;
	
	if(parameters->cp_cinema){
		cinema_setup_encoder(parameters,image,&img_fol);
	}
	
	if (img_fol.rates)
		MEM_freeN(img_fol.rates);
	
	return image;
}


/* Found write info at http://users.ece.gatech.edu/~slabaugh/personal/c/bitmapUnix.c */
int imb_savejp2(struct ImBuf *ibuf, char *name, int flags) {
	
	int quality = ibuf->ftype & 0xff;
	
	int bSuccess;
	opj_cparameters_t parameters;	/* compression parameters */
	opj_event_mgr_t event_mgr;		/* event manager */
	opj_image_t *image = NULL;
	
	(void)flags; /* unused */
	
	/*
	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);
	
	/* compression ratio */
	/* invert range, from 10-100, 100-1
	* where jpeg see's 1 and highest quality (lossless) and 100 is very low quality*/
	parameters.tcp_rates[0]= ((100-quality)/90.0f*99.0f) + 1;

	
	parameters.tcp_numlayers = 1; // only one resolution
	parameters.cp_disto_alloc = 1;

	image= ibuftoimage(ibuf, &parameters);
	
	
	{			/* 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, NULL); /* last arg used to be parameters.index but this deprecated */
		
		if (!bSuccess) {
			opj_cio_close(cio);
			fprintf(stderr, "failed to encode image\n");
			return 0;
		}
		codestream_length = cio_tell(cio);

		/* write the buffer to disk */
		f = fopen(name, "wb");
		
		if (!f) {
			fprintf(stderr, "failed to open %s for writing\n", name);
			return 1;
		}
		fwrite(cio->buffer, 1, codestream_length, f);
		fclose(f);
		fprintf(stderr,"Generated outfile %s\n",name);
		/* close and free the byte stream */
		opj_cio_close(cio);
		
		/* free remaining compression structures */
		opj_destroy_compress(cinfo);
	}

	/* free image data */
	opj_image_destroy(image);
	
	return 1;
}

#endif /* WITH_OPENJPEG */