text: /*
   * Copyright (c) 1999-2000 Image Power, Inc. and the University of
   *   British Columbia.
   * Copyright (c) 2001-2003 Michael David Adams.
   * All rights reserved.
   */
  
  /* __START_OF_JASPER_LICENSE__
   * 
   * JasPer License Version 2.0
   * 
   * Copyright (c) 2001-2006 Michael David Adams
   * Copyright (c) 1999-2000 Image Power, Inc.
   * Copyright (c) 1999-2000 The University of British Columbia
   * 
   * All rights reserved.
   * 
   * Permission is hereby granted, free of charge, to any person (the
   * "User") obtaining a copy of this software and associated documentation
   * files (the "Software"), to deal in the Software without restriction,
   * including without limitation the rights to use, copy, modify, merge,
   * publish, distribute, and/or sell copies of the Software, and to permit
   * persons to whom the Software is furnished to do so, subject to the
   * following conditions:
   * 
   * 1.  The above copyright notices and this permission notice (which
   * includes the disclaimer below) shall be included in all copies or
   * substantial portions of the Software.
   * 
   * 2.  The name of a copyright holder shall not be used to endorse or
   * promote products derived from the Software without specific prior
   * written permission.
   * 
   * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
   * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
   * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
   * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
   * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
   * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
   * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
   * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
   * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
   * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
   * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
   * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
   * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
   * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
   * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
   * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
   * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
   * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
   * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
   * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
   * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
   * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
   * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
   * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
   * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
   * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
   * 
   * __END_OF_JASPER_LICENSE__
   */
  
  /*
   * JP2 Library
   *
   * $Id$
   */
  
  /******************************************************************************\
  * Includes.
  \******************************************************************************/
  
  #include "jp2_dec.h"
  #include "jp2_cod.h"
  
  #include "jasper/jas_image.h"
  #include "jasper/jas_stream.h"
  #include "jasper/jas_math.h"
  #include "jasper/jas_debug.h"
  #include "jasper/jas_malloc.h"
  #include "jasper/jas_types.h"
  
  #include <assert.h>
  #include <stdio.h>
  
  /******************************************************************************\
  \******************************************************************************/
  
  #define	JP2_VALIDATELEN	(JAS_MIN(JP2_JP_LEN + 16, JAS_STREAM_MAXPUTBACK))
  
  /******************************************************************************\
  * Function prototypes.
  \******************************************************************************/
  
  static jp2_dec_t *jp2_dec_create(void);
  static void jp2_dec_destroy(jp2_dec_t *dec);
  static int jp2_getcs(jp2_colr_t *colr);
  static int fromiccpcs(int cs);
  static int jp2_getct(int colorspace, int type, int assoc);
  
  /******************************************************************************\
  * Functions.
  \******************************************************************************/
  
  jas_image_t *jp2_decode(jas_stream_t *in, const char *optstr)
  {
  	jp2_box_t *box;
  	int found;
  	jas_image_t *image;
  	jp2_dec_t *dec;
  	bool samedtype;
  	int dtype;
  	unsigned int i;
  	jp2_cmap_t *cmapd;
  	jp2_pclr_t *pclrd;
  #if 0
  	/* The following code appears to no longer be needed. */
  	jp2_cdef_t *cdefd;
  #endif
  	unsigned int channo;
  	int newcmptno;
  	int_fast32_t *lutents;
  #if 0
  	jp2_cdefchan_t *cdefent;
  	int cmptno;
  #endif
  	jp2_cmapent_t *cmapent;
  	jas_icchdr_t icchdr;
  	jas_iccprof_t *iccprof;
  
  	dec = 0;
  	box = 0;
  	image = 0;
  
  	JAS_LOGDEBUGF(100, "jp2_decode(%p, \"%s\")\n", in, optstr);
  
  	if (!(dec = jp2_dec_create())) {
  		goto error;
  	}
  
  	/* Get the first box.  This should be a JP box. */
  	if (!(box = jp2_box_get(in))) {
  		jas_logerrorf("error: cannot get box\n");
  		goto error;
  	}
  	if (box->type != JP2_BOX_JP) {
  		jas_logerrorf("error: expecting signature box\n");
  		goto error;
  	}
  	if (box->data.jp.magic != JP2_JP_MAGIC) {
  		jas_logerrorf("incorrect magic number\n");
  		goto error;
  	}
  	jp2_box_destroy(box);
  	box = 0;
  
  	/* Get the second box.  This should be a FTYP box. */
  	if (!(box = jp2_box_get(in))) {
  		goto error;
  	}
  	if (box->type != JP2_BOX_FTYP) {
  		jas_logerrorf("expecting file type box\n");
  		goto error;
  	}
  	jp2_box_destroy(box);
  	box = 0;
  
  	/* Get more boxes... */
  	found = 0;
  	while ((box = jp2_box_get(in))) {
  		if (jas_getdbglevel() >= 1) {
  			jas_logdebugf(1, "got box type %s\n", box->info->name);
  		}
  		switch (box->type) {
  		case JP2_BOX_JP2C:
  			found = 1;
  			break;
  		case JP2_BOX_IHDR:
  			if (!dec->ihdr) {
  				dec->ihdr = box;
  				box = 0;
  			}
  			break;
  		case JP2_BOX_BPCC:
  			if (!dec->bpcc) {
  				dec->bpcc = box;
  				box = 0;
  			}
  			break;
  		case JP2_BOX_CDEF:
  			if (!dec->cdef) {
  				dec->cdef = box;
  				box = 0;
  			}
  			break;
  		case JP2_BOX_PCLR:
  			if (!dec->pclr) {
  				dec->pclr = box;
  				box = 0;
  			}
  			break;
  		case JP2_BOX_CMAP:
  			if (!dec->cmap) {
  				dec->cmap = box;
  				box = 0;
  			}
  			break;
  		case JP2_BOX_COLR:
  			if (!dec->colr) {
  				dec->colr = box;
  				box = 0;
  			}
  			break;
  		}
  		if (box) {
  			jp2_box_destroy(box);
  			box = 0;
  		}
  		if (found) {
  			break;
  		}
  	}
  
  	if (!found) {
  		jas_logerrorf("error: no code stream found\n");
  		goto error;
  	}
  
  	if (!(dec->image = jpc_decode(in, optstr))) {
  		jas_logerrorf("error: cannot decode code stream\n");
  		goto error;
  	}
  
  	/* An IHDR box must be present. */
  	if (!dec->ihdr) {
  		jas_logerrorf("error: missing IHDR box\n");
  		goto error;
  	}
  
  	/* Does the number of components indicated in the IHDR box match
  	  the value specified in the code stream? */
  	if (dec->ihdr->data.ihdr.numcmpts != JAS_CAST(jas_uint,
  	  jas_image_numcmpts(dec->image))) {
  		jas_logerrorf("error: number of components mismatch (IHDR)\n");
  		goto error;
  	}
  
  	/* At least one component must be present. */
  	if (!jas_image_numcmpts(dec->image)) {
  		jas_logerrorf("error: no components\n");
  		goto error;
  	}
  
  	/* Determine if all components have the same data type. */
  	samedtype = true;
  	dtype = jas_image_cmptdtype(dec->image, 0);
  	for (i = 1; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) {
  		if (jas_image_cmptdtype(dec->image, i) != dtype) {
  			samedtype = false;
  			break;
  		}
  	}
  
  	/* Is the component data type indicated in the IHDR box consistent
  	  with the data in the code stream? */
  	if ((samedtype && dec->ihdr->data.ihdr.bpc != JP2_DTYPETOBPC(dtype)) ||
  	  (!samedtype && dec->ihdr->data.ihdr.bpc != JP2_IHDR_BPCNULL)) {
  		jas_logerrorf("error: component data type mismatch (IHDR)\n");
  		goto error;
  	}
  
  	/* Is the compression type supported? */
  	if (dec->ihdr->data.ihdr.comptype != JP2_IHDR_COMPTYPE) {
  		jas_logerrorf("error: unsupported compression type\n");
  		goto error;
  	}
  
  	if (dec->bpcc) {
  		/* Is the number of components indicated in the BPCC box
  		  consistent with the code stream data? */
  		if (dec->bpcc->data.bpcc.numcmpts !=
  		  JAS_CAST(jas_uint, jas_image_numcmpts(dec->image))) {
  			jas_logerrorf("error: number of components mismatch (BPCC)\n");
  			goto error;
  		}
  		/* Is the component data type information indicated in the BPCC
  		  box consistent with the code stream data? */
  		if (!samedtype) {
  			for (i = 0; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image));
  			  ++i) {
  				if (jas_image_cmptdtype(dec->image, i) !=
  				  JP2_BPCTODTYPE(dec->bpcc->data.bpcc.bpcs[i])) {
  					jas_logerrorf("error: component data type mismatch (BPCC)\n");
  						goto error;
  				}
  			}
  		} else {
  			jas_logwarnf("warning: superfluous BPCC box\n");
  		}
  	}
  
  	/* A COLR box must be present. */
  	if (!dec->colr) {
  		jas_logerrorf("error: no COLR box\n");
  		goto error;
  	}
  
  	switch (dec->colr->data.colr.method) {
  	case JP2_COLR_ENUM:
  		jas_image_setclrspc(dec->image, jp2_getcs(&dec->colr->data.colr));
  		break;
  	case JP2_COLR_ICC:
  		iccprof = jas_iccprof_createfrombuf(dec->colr->data.colr.iccp,
  		  dec->colr->data.colr.iccplen);
  		if (!iccprof) {
  			jas_logerrorf("error: failed to parse ICC profile\n");
  			goto error;
  		}
  		jas_iccprof_gethdr(iccprof, &icchdr);
  		jas_loginfof("ICC Profile CS %08x\n", icchdr.colorspc);
  		jas_image_setclrspc(dec->image, fromiccpcs(icchdr.colorspc));
  		dec->image->cmprof_ = jas_cmprof_createfromiccprof(iccprof);
  		if (!dec->image->cmprof_) {
  			jas_iccprof_destroy(iccprof);
  			goto error;
  		}
  		jas_iccprof_destroy(iccprof);
  		break;
  	}
  
  	/* If a CMAP box is present, a PCLR box must also be present. */
  	if (dec->cmap && !dec->pclr) {
  		jas_logwarnf("warning: missing PCLR box or superfluous CMAP box\n");
  		jp2_box_destroy(dec->cmap);
  		dec->cmap = 0;
  	}
  
  	/* If a CMAP box is not present, a PCLR box must not be present. */
  	if (!dec->cmap && dec->pclr) {
  		jas_logwarnf("warning: missing CMAP box or superfluous PCLR box\n");
  		jp2_box_destroy(dec->pclr);
  		dec->pclr = 0;
  	}
  
  	/* Determine the number of channels (which is essentially the number
  	  of components after any palette mappings have been applied). */
  	dec->numchans = dec->cmap ? dec->cmap->data.cmap.numchans :
  	  JAS_CAST(jas_uint, jas_image_numcmpts(dec->image));
  
  	/* Perform a basic sanity check on the CMAP box if present. */
  	if (dec->cmap) {
  		for (i = 0; i < dec->numchans; ++i) {
  			/* Is the component number reasonable? */
  			if (dec->cmap->data.cmap.ents[i].cmptno >= JAS_CAST(jas_uint,
  			  jas_image_numcmpts(dec->image))) {
  				jas_logerrorf("error: invalid component number in CMAP box\n");
  				goto error;
  			}
  			/* Is the LUT index reasonable? */
  			if (dec->cmap->data.cmap.ents[i].pcol >=
  			  dec->pclr->data.pclr.numchans) {
  				jas_logerrorf("error: invalid CMAP LUT index\n");
  				goto error;
  			}
  		}
  	}
  
  	/* Allocate space for the channel-number to component-number LUT. */
  	if (!(dec->chantocmptlut = jas_alloc2(dec->numchans,
  	  sizeof(uint_fast16_t)))) {
  		jas_logerrorf("error: no memory\n");
  		goto error;
  	}
  
  	if (!dec->cmap) {
  		for (i = 0; i < dec->numchans; ++i) {
  			dec->chantocmptlut[i] = i;
  		}
  	} else {
  		/* Check to ensure that CMAP/PCLR were initialized. */
  		if (!dec->cmap || !dec->pclr) {
  			jas_logerrorf("missing CMAP/PCLR box\n");
  			goto error;
  		}
  
  		cmapd = &dec->cmap->data.cmap;
  		pclrd = &dec->pclr->data.pclr;
  #if 0
  		/* The following code appears to no longer be needed. */
  		cdefd = &dec->cdef->data.cdef;
  #endif
  		for (channo = 0; channo < cmapd->numchans; ++channo) {
  			cmapent = &cmapd->ents[channo];
  			if (cmapent->map == JP2_CMAP_DIRECT) {
  				dec->chantocmptlut[channo] = channo;
  			} else if (cmapent->map == JP2_CMAP_PALETTE) {
  				if (!pclrd->numlutents) {
  					goto error;
  				}
  				if (!(lutents = jas_alloc2(pclrd->numlutents,
  				  sizeof(int_fast32_t)))) {
  					goto error;
  				}
  				for (i = 0; i < pclrd->numlutents; ++i) {
  					lutents[i] = pclrd->lutdata[cmapent->pcol + i * pclrd->numchans];
  				}
  				newcmptno = jas_image_numcmpts(dec->image);
  				if (jas_image_depalettize(dec->image, cmapent->cmptno,
  				  pclrd->numlutents, lutents,
  				  JP2_BPCTODTYPE(pclrd->bpc[cmapent->pcol]), newcmptno)) {
  					jas_logerrorf("jas_image_depalettize failed\n");
  					jas_free(lutents);
  					goto error;
  				}
  				dec->chantocmptlut[channo] = newcmptno;
  				jas_free(lutents);
  #if 0
  				/* The following code appears to no longer be needed. */
  				if (dec->cdef) {
  					cdefent = jp2_cdef_lookup(cdefd, channo);
  					if (!cdefent) {
  						abort();
  					}
  				jas_image_setcmpttype(dec->image, newcmptno, jp2_getct(jas_image_clrspc(dec->image), cdefent->type, cdefent->assoc));
  				} else {
  				jas_image_setcmpttype(dec->image, newcmptno, jp2_getct(jas_image_clrspc(dec->image), 0, channo + 1));
  				}
  #endif
  			} else {
  				jas_logerrorf("error: invalid MTYP in CMAP box\n");
  				goto error;
  			}
  		}
  	}
  
  #if 0
  	/* The following code appears to no longer be needed. */
  	/* Ensure that the number of channels being used by the decoder
  	  matches the number of image components. */
  	if (dec->numchans != jas_image_numcmpts(dec->image)) {
  		jas_logerrorf("error: mismatch in number of components (%d != %d)\n",
  		  dec->numchans, jas_image_numcmpts(dec->image));
  		goto error;
  	}
  #endif
  
  	/* Mark all components as being of unknown type. */
  
  	for (i = 0; i < JAS_CAST(jas_uint, jas_image_numcmpts(dec->image)); ++i) {
  		jas_image_setcmpttype(dec->image, i, JAS_IMAGE_CT_UNKNOWN);
  	}
  
  	/* Determine the type of each component. */
  	if (dec->cdef) {
  		for (i = 0; i < dec->cdef->data.cdef.numchans; ++i) {
  			uint_fast16_t channo = dec->cdef->data.cdef.ents[i].channo;
  			/* Is the channel number reasonable? */
  			if (channo >= dec->numchans) {
  				jas_logerrorf("error: invalid channel number in CDEF box (%d)\n",
  				  channo);
  				goto error;
  			}
  			unsigned compno = dec->chantocmptlut[channo];
  			if (compno >= jas_image_numcmpts(dec->image)) {
  				jas_logerrorf(
  				  "error: invalid component reference in CDEF box (%d)\n",
  				  compno);
  				goto error;
  			}
  			jas_image_setcmpttype(dec->image, compno,
  			  jp2_getct(jas_image_clrspc(dec->image),
  			  dec->cdef->data.cdef.ents[i].type,
  			  dec->cdef->data.cdef.ents[i].assoc));
  		}
  	} else {
  		for (i = 0; i < dec->numchans; ++i) {
  			unsigned compno = dec->chantocmptlut[i];
  			if (compno >= jas_image_numcmpts(dec->image)) {
  				jas_logerrorf(
  				  "error: invalid component reference (%d)\n", compno);
  				goto error;
  			}
  			jas_image_setcmpttype(dec->image, compno,
  			  jp2_getct(jas_image_clrspc(dec->image), 0, i + 1));
  		}
  	}
  
  	/* Delete any components that are not of interest. */
  	for (i = jas_image_numcmpts(dec->image); i > 0; --i) {
  		if (jas_image_cmpttype(dec->image, i - 1) == JAS_IMAGE_CT_UNKNOWN) {
  			jas_image_delcmpt(dec->image, i - 1);
  		}
  	}
  
  	/* Ensure that some components survived. */
  	if (!jas_image_numcmpts(dec->image)) {
  		jas_logerrorf("error: no components\n");
  		goto error;
  	}
  
  	/* Prevent the image from being destroyed later. */
  	image = dec->image;
  	dec->image = 0;
  
  	jp2_dec_destroy(dec);
  
  	return image;
  
  error:
  	if (image) {
  		jas_image_destroy(image);
  	}
  	if (box) {
  		jp2_box_destroy(box);
  	}
  	if (dec) {
  		jp2_dec_destroy(dec);
  	}
  	return 0;
  }
  
  int jp2_validate(jas_stream_t *in)
  {
  	unsigned char buf[JP2_VALIDATELEN];
  #if 0
  	jas_stream_t *tmpstream;
  	jp2_box_t *box;
  #endif
  
  	assert(JAS_STREAM_MAXPUTBACK >= JP2_VALIDATELEN);
  
  	/* Read the validation data (i.e., the data used for detecting
  	  the format). */
  	if (jas_stream_peek(in, buf, sizeof(buf)) != sizeof(buf))
  		return -1;
  
  	/* Is the box type correct? */
  	if ((((uint_least32_t)buf[4] << 24) | ((uint_least32_t)buf[5] << 16) | ((uint_least32_t)buf[6] << 8) | (uint_least32_t)buf[7]) !=
  	  JP2_BOX_JP)
  	{
  		return -1;
  	}
  
  	return 0;
  }
  
  static jp2_dec_t *jp2_dec_create(void)
  {
  	jp2_dec_t *dec;
  
  	if (!(dec = jas_malloc(sizeof(jp2_dec_t)))) {
  		return 0;
  	}
  	dec->ihdr = 0;
  	dec->bpcc = 0;
  	dec->cdef = 0;
  	dec->pclr = 0;
  	dec->image = 0;
  	dec->chantocmptlut = 0;
  	dec->cmap = 0;
  	dec->colr = 0;
  	return dec;
  }
  
  static void jp2_dec_destroy(jp2_dec_t *dec)
  {
  	if (dec->ihdr) {
  		jp2_box_destroy(dec->ihdr);
  	}
  	if (dec->bpcc) {
  		jp2_box_destroy(dec->bpcc);
  	}
  	if (dec->cdef) {
  		jp2_box_destroy(dec->cdef);
  	}
  	if (dec->pclr) {
  		jp2_box_destroy(dec->pclr);
  	}
  	if (dec->image) {
  		jas_image_destroy(dec->image);
  	}
  	if (dec->cmap) {
  		jp2_box_destroy(dec->cmap);
  	}
  	if (dec->colr) {
  		jp2_box_destroy(dec->colr);
  	}
  	if (dec->chantocmptlut) {
  		jas_free(dec->chantocmptlut);
  	}
  	jas_free(dec);
  }
  
  static int jp2_getct(int colorspace, int type, int assoc)
  {
  	if (type == 1 && assoc == 0) {
  		return JAS_IMAGE_CT_OPACITY;
  	}
  	if (type == 0 && assoc >= 1 && assoc <= 65534) {
  		switch (colorspace) {
  		case JAS_CLRSPC_FAM_RGB:
  			switch (assoc) {
  			case JP2_CDEF_RGB_R:
  				return JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R);
  			case JP2_CDEF_RGB_G:
  				return JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G);
  			case JP2_CDEF_RGB_B:
  				return JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B);
  			}
  			break;
  		case JAS_CLRSPC_FAM_YCBCR:
  			switch (assoc) {
  			case JP2_CDEF_YCBCR_Y:
  				return JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_Y);
  			case JP2_CDEF_YCBCR_CB:
  				return JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_CB);
  			case JP2_CDEF_YCBCR_CR:
  				return JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_YCBCR_CR);
  			}
  			break;
  		case JAS_CLRSPC_FAM_GRAY:
  			switch (assoc) {
  			case JP2_CDEF_GRAY_Y:
  				return JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_GRAY_Y);
  			}
  			break;
  		default:
  			return JAS_IMAGE_CT_COLOR(assoc - 1);
  		}
  	}
  	return JAS_IMAGE_CT_UNKNOWN;
  }
  
  static int jp2_getcs(jp2_colr_t *colr)
  {
  	if (colr->method == JP2_COLR_ENUM) {
  		switch (colr->csid) {
  		case JP2_COLR_SRGB:
  			return JAS_CLRSPC_SRGB;
  		case JP2_COLR_SYCC:
  			return JAS_CLRSPC_SYCBCR;
  		case JP2_COLR_SGRAY:
  			return JAS_CLRSPC_SGRAY;
  		}
  	}
  	return JAS_CLRSPC_UNKNOWN;
  }
  
  static int fromiccpcs(int cs)
  {
  	switch (cs) {
  	case ICC_CS_RGB:
  		return JAS_CLRSPC_GENRGB;
  	case ICC_CS_YCBCR:
  		return JAS_CLRSPC_GENYCBCR;
  	case ICC_CS_GRAY:
  		return JAS_CLRSPC_GENGRAY;
  	}
  	return JAS_CLRSPC_UNKNOWN;
  }
  