/******************************************************************************
 * $Id: jp2kakdataset.cpp 18342 2009-12-19 05:18:38Z warmerdam $
 *
 * Project:  JPEG-2000
 * Purpose:  Implementation of the ISO/IEC 15444-1 standard based on Kakadu.
 * Author:   Frank Warmerdam, warmerdam@pobox.com
 *
 ******************************************************************************
 * Copyright (c) 2002, Frank Warmerdam <warmerdam@pobox.com>
 *
 * Permission is hereby granted, free of charge, to any person 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, sublicense,
 * 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:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "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. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/

#include "gdal_pam.h"
#include "gdaljp2metadata.h"
#include "cpl_string.h"
#include "cpl_multiproc.h"
#include "jp2_local.h"

// Kakadu core includes
#include "kdu_elementary.h"
#include "kdu_messaging.h"
#include "kdu_params.h"
#include "kdu_compressed.h"
#include "kdu_sample_processing.h"
#include "kdu_stripe_decompressor.h"
#include "kdu_arch.h"

#include "subfile_source.h"
#include "vsil_target.h"

// Application level includes
#include "kdu_file_io.h"
#include "jp2.h"

// ROI related.
#include "kdu_roi_processing.h"
#include "kdu_image.h"
#include "roi_sources.h"

// I don't think JPIP support currently works due to changes in 
// classes like kdu_window ... some fixing required if someone wants it.
// #define USE_JPIP

#ifdef USE_JPIP
#  include "kdu_client.h" 
#else
#  define kdu_client void
#endif

// #define KAKADU_JPX	1

CPL_CVSID("$Id: jp2kakdataset.cpp 18342 2009-12-19 05:18:38Z warmerdam $");

CPL_C_START
CPLErr CPL_DLL GTIFMemBufFromWkt( const char *pszWKT, 
                                  const double *padfGeoTransform,
                                  int nGCPCount, const GDAL_GCP *pasGCPList,
                                  int *pnSize, unsigned char **ppabyBuffer );
CPLErr CPL_DLL GTIFWktFromMemBuf( int nSize, unsigned char *pabyBuffer, 
                          char **ppszWKT, double *padfGeoTransform,
                          int *pnGCPCount, GDAL_GCP **ppasGCPList );
CPL_C_END

static int kakadu_initialized = FALSE;

static void
transfer_bytes(kdu_byte *dest, kdu_line_buf &src, int gap, int precision,
               GDALDataType eOutType );

static unsigned char jp2_header[] = 
{0x00,0x00,0x00,0x0c,0x6a,0x50,0x20,0x20,0x0d,0x0a,0x87,0x0a};

static unsigned char jpc_header[] = 
{0xff,0x4f};


/************************************************************************/
/* ==================================================================== */
/*				JP2KAKDataset				*/
/* ==================================================================== */
/************************************************************************/

class JP2KAKDataset : public GDALPamDataset
{
    friend class JP2KAKRasterBand;

    kdu_codestream oCodeStream;
    kdu_compressed_source *poInput;
    kdu_compressed_source *poRawInput;
    jp2_family_src  *family;
    kdu_client      *jpip_client;
    kdu_dims dims; 
    int            nResCount;
    bool           bPreferNPReads;
    kdu_thread_env *poThreadEnv;

    char	   *pszProjection;
    double	   adfGeoTransform[6];
    int            bGeoTransformValid;

    int		   nGCPCount;
    GDAL_GCP       *pasGCPList;

    void           PamOverride();

    int         TestUseBlockIO( int, int, int, int, int, int,
                                GDALDataType, int, int * );
    CPLErr      DirectRasterIO( GDALRWFlag, int, int, int, int,
                                void *, int, int, GDALDataType,
                                int, int *, int, int, int );

    virtual CPLErr IRasterIO( GDALRWFlag, int, int, int, int,
                              void *, int, int, GDALDataType,
                              int, int *, int, int, int );


  public:
                JP2KAKDataset();
		~JP2KAKDataset();
    
    virtual CPLErr IBuildOverviews( const char *, int, int *,
                                    int, int *, GDALProgressFunc, void * );
    
    virtual CPLErr GetGeoTransform( double * );
    virtual const char *GetProjectionRef(void);
    virtual int    GetGCPCount();
    virtual const char *GetGCPProjection();
    virtual const GDAL_GCP *GetGCPs();

    static void KakaduInitialize();
    static GDALDataset *Open( GDALOpenInfo * );
    static int          Identify( GDALOpenInfo * );
};

/************************************************************************/
/* ==================================================================== */
/*                            JP2KAKRasterBand                          */
/* ==================================================================== */
/************************************************************************/

class JP2KAKRasterBand : public GDALPamRasterBand
{
    friend class JP2KAKDataset;

    JP2KAKDataset *poBaseDS;

    int         nDiscardLevels; 

    kdu_dims 	band_dims; 

    int		nOverviewCount;
    JP2KAKRasterBand **papoOverviewBand;

    kdu_client      *jpip_client;

    kdu_codestream oCodeStream;

    GDALColorTable oCT;

    int         bYCbCrReported;
    
    GDALColorInterp eInterp;

    virtual CPLErr IRasterIO( GDALRWFlag, int, int, int, int,
                              void *, int, int, GDALDataType,
                              int, int );

    int            HasExternalOverviews() 
                   { return GDALPamRasterBand::GetOverviewCount() != 0; }

  public:

    		JP2KAKRasterBand( int, int, kdu_codestream, int, kdu_client *,
                                  jp2_channels, JP2KAKDataset * );
    		~JP2KAKRasterBand();
    
    virtual CPLErr IReadBlock( int, int, void * );

    virtual int    GetOverviewCount();
    virtual GDALRasterBand *GetOverview( int );

    virtual GDALColorInterp GetColorInterpretation();
    virtual GDALColorTable *GetColorTable();

    // internal

    void        ApplyPalette( jp2_palette oJP2Palette );
    void        ProcessYCbCrTile(kdu_tile tile, GByte *pabyBuffer, 
                                 int nBlockXOff, int nBlockYOff,
                                 int nTileOffsetX, int nTileOffsetY );
    void        ProcessTile(kdu_tile tile, GByte *pabyBuffer );
};

/************************************************************************/
/* ==================================================================== */
/*                     Set up messaging services                        */
/* ==================================================================== */
/************************************************************************/

class kdu_cpl_error_message : public kdu_message 
{
public: // Member classes
    kdu_cpl_error_message( CPLErr eErrClass ) 
    {
        m_eErrClass = eErrClass;
        m_pszError = NULL;
    }

    void put_text(const char *string)
    {
        if( m_pszError == NULL )
            m_pszError = CPLStrdup( string );
        else
        {
            m_pszError = (char *) 
                CPLRealloc(m_pszError, strlen(m_pszError) + strlen(string)+1 );
            strcat( m_pszError, string );
        }
    }

    class JP2KAKException
    {
    };

    void flush(bool end_of_message=false) 
    {
        if( m_pszError == NULL )
            return;
        if( m_pszError[strlen(m_pszError)-1] == '\n' )
            m_pszError[strlen(m_pszError)-1] = '\0';

        CPLError( m_eErrClass, CPLE_AppDefined, "%s", m_pszError );
        CPLFree( m_pszError );
        m_pszError = NULL;

        if( end_of_message && m_eErrClass == CE_Failure )
        {
            throw new JP2KAKException();
        }
    }

private:
    CPLErr m_eErrClass;
    char *m_pszError;
};

/************************************************************************/
/* ==================================================================== */
/*                            JP2KAKRasterBand                          */
/* ==================================================================== */
/************************************************************************/

/************************************************************************/
/*                           JP2KAKRasterBand()                         */
/************************************************************************/

JP2KAKRasterBand::JP2KAKRasterBand( int nBand, int nDiscardLevels,
                                    kdu_codestream oCodeStream,
                                    int nResCount, kdu_client *jpip_client,
                                    jp2_channels oJP2Channels,
                                    JP2KAKDataset *poBaseDSIn )

{
    this->nBand = nBand;
    this->poBaseDS = poBaseDSIn;

    bYCbCrReported = FALSE;

    if( oCodeStream.get_bit_depth(nBand-1) > 8
        && oCodeStream.get_bit_depth(nBand-1) <= 16
        && oCodeStream.get_signed(nBand-1) )
        this->eDataType = GDT_Int16;
    else if( oCodeStream.get_bit_depth(nBand-1) > 8
             && oCodeStream.get_bit_depth(nBand-1) <= 16
             && !oCodeStream.get_signed(nBand-1) )
        this->eDataType = GDT_UInt16;
    else if( oCodeStream.get_bit_depth(nBand-1) > 16 )
        this->eDataType = GDT_Float32;
    else
        this->eDataType = GDT_Byte;

    this->nDiscardLevels = nDiscardLevels;
    this->oCodeStream = oCodeStream;

    this->jpip_client = jpip_client;

    oCodeStream.apply_input_restrictions( 0, 0, nDiscardLevels, 0, NULL );
    oCodeStream.get_dims( 0, band_dims );

    this->nRasterXSize = band_dims.size.x;
    this->nRasterYSize = band_dims.size.y;
    if( oCodeStream.get_bit_depth(nBand-1) % 8 != 0 )
    {
        
        SetMetadataItem( "NBITS", 
                         CPLString().Printf("%d",oCodeStream.get_bit_depth(nBand-1)), 
                         "IMAGE_STRUCTURE" );
    }
    SetMetadataItem( "COMPRESSION", "JP2000", "IMAGE_STRUCTURE" );

/* -------------------------------------------------------------------- */
/*      Use a 2048x128 "virtual" block size unless the file is small.    */
/* -------------------------------------------------------------------- */
    if( nRasterXSize >= 2048 )
        nBlockXSize = 2048;
    else
        nBlockXSize = nRasterXSize;
    
    if( nRasterYSize >= 256 )
        nBlockYSize = 128;
    else
        nBlockYSize = nRasterYSize;

/* -------------------------------------------------------------------- */
/*      Figure out the color interpretation for this band.              */
/* -------------------------------------------------------------------- */
    
    eInterp = GCI_Undefined;

    if( oJP2Channels.exists() )
    {
        int nRedIndex=-1, nGreenIndex=-1, nBlueIndex=-1, nLutIndex;
        int nCSI;

        if( oJP2Channels.get_num_colours() == 3 )
        {
            oJP2Channels.get_colour_mapping( 0, nRedIndex, nLutIndex, nCSI );
            oJP2Channels.get_colour_mapping( 1, nGreenIndex, nLutIndex, nCSI );
            oJP2Channels.get_colour_mapping( 2, nBlueIndex, nLutIndex, nCSI );
        }
        else
        {
            oJP2Channels.get_colour_mapping( 0, nRedIndex, nLutIndex, nCSI );
            if( nBand == 1 )
                eInterp = GCI_GrayIndex;
        }

        if( eInterp != GCI_Undefined )
            /* nothing to do */;

        // If we have LUT info, it is a palette image.
        else if( nLutIndex != -1 )
            eInterp = GCI_PaletteIndex;

        // Establish color band this is. 
        else if( nRedIndex == nBand-1 )
            eInterp = GCI_RedBand;
        else if( nGreenIndex == nBand-1 )
            eInterp = GCI_GreenBand;
        else if( nBlueIndex == nBand-1 )
            eInterp = GCI_BlueBand;
        else
            eInterp = GCI_Undefined;

        // Could this band be an alpha band?
        if( eInterp == GCI_Undefined )
        {
            int color_idx, opacity_idx, lut_idx;

            for( color_idx = 0; 
                 color_idx < oJP2Channels.get_num_colours(); color_idx++ )
            {
                if( oJP2Channels.get_opacity_mapping( color_idx, opacity_idx,
                                                      lut_idx, nCSI ) )
                {
                    if( opacity_idx == nBand - 1 )
                        eInterp = GCI_AlphaBand;
                }
                if( oJP2Channels.get_premult_mapping( color_idx, opacity_idx,
                                                      lut_idx, nCSI ) )
                {
                    if( opacity_idx == nBand - 1 )
                        eInterp = GCI_AlphaBand;
                }
            }
        }
    }
    else if( nBand == 1 )
        eInterp = GCI_RedBand;
    else if( nBand == 2 )
        eInterp = GCI_GreenBand;
    else if( nBand == 3 )
        eInterp = GCI_BlueBand;
    else
        eInterp = GCI_GrayIndex;
        
/* -------------------------------------------------------------------- */
/*      Do we have any overviews?  Only check if we are the full res    */
/*      image.                                                          */
/* -------------------------------------------------------------------- */
    nOverviewCount = 0;
    papoOverviewBand = 0;
    if( nDiscardLevels == 0 && GDALPamRasterBand::GetOverviewCount() == 0 )
    {
        int  nXSize = nRasterXSize, nYSize = nRasterYSize;

        for( int nDiscard = 1; nDiscard < nResCount; nDiscard++ )
        {
            kdu_dims  dims;

            nXSize = (nXSize+1) / 2;
            nYSize = (nYSize+1) / 2;

            if( (nXSize+nYSize) < 128 || nXSize < 4 || nYSize < 4 )
                continue; /* skip super reduced resolution layers */

            oCodeStream.apply_input_restrictions( 0, 0, nDiscard, 0, NULL );
            oCodeStream.get_dims( 0, dims );

            if( (dims.size.x == nXSize || dims.size.x == nXSize-1)
                && (dims.size.y == nYSize || dims.size.y == nYSize-1) )
            {
                nOverviewCount++;
                papoOverviewBand = (JP2KAKRasterBand **) 
                    CPLRealloc( papoOverviewBand, 
                                sizeof(void*) * nOverviewCount );
                papoOverviewBand[nOverviewCount-1] = 
                    new JP2KAKRasterBand( nBand, nDiscard, oCodeStream, 0,
                                          jpip_client, oJP2Channels,
                                          poBaseDS );
            }
            else
            {
                CPLDebug( "GDAL", "Discard %dx%d JPEG2000 overview layer,\n"
                          "expected %dx%d.", 
                          dims.size.x, dims.size.y, nXSize, nYSize );
            }
        }
    }
}

/************************************************************************/
/*                         ~JP2KAKRasterBand()                          */
/************************************************************************/

JP2KAKRasterBand::~JP2KAKRasterBand()

{
    for( int i = 0; i < nOverviewCount; i++ )
        delete papoOverviewBand[i];

    CPLFree( papoOverviewBand );
}

/************************************************************************/
/*                          GetOverviewCount()                          */
/************************************************************************/

int JP2KAKRasterBand::GetOverviewCount()

{
    if( GDALPamRasterBand::GetOverviewCount() > 0 )
        return GDALPamRasterBand::GetOverviewCount();
    else
        return nOverviewCount;
}

/************************************************************************/
/*                            GetOverview()                             */
/************************************************************************/

GDALRasterBand *JP2KAKRasterBand::GetOverview( int iOverviewIndex )

{
    if( GDALPamRasterBand::GetOverviewCount() > 0 )
        return GDALPamRasterBand::GetOverview( iOverviewIndex );

    else if( iOverviewIndex < 0 || iOverviewIndex >= nOverviewCount )
        return NULL;
    else
        return papoOverviewBand[iOverviewIndex];
}

/************************************************************************/
/*                             IReadBlock()                             */
/************************************************************************/

CPLErr JP2KAKRasterBand::IReadBlock( int nBlockXOff, int nBlockYOff,
                                      void * pImage )
{
    CPLDebug( "JP2KAK", "IReadBlock(%d,%d) on band %d.", 
              nBlockXOff, nBlockYOff, nBand );

    try
    {
/* -------------------------------------------------------------------- */
/*      Setup a ROI matching the block requested.                       */
/* -------------------------------------------------------------------- */
        kdu_dims dims = band_dims;

        dims.pos.x = dims.pos.x + nBlockXOff * nBlockXSize;
        dims.pos.y = dims.pos.y + nBlockYOff * nBlockYSize;
        dims.size.x = nBlockXSize;
        dims.size.y = nBlockYSize;
    
        kdu_dims dims_roi;

        oCodeStream.apply_input_restrictions( 0, 0, nDiscardLevels, 0, NULL );
        oCodeStream.map_region( 0, dims, dims_roi );
        oCodeStream.apply_input_restrictions( 0, 0, nDiscardLevels, 0, 
                                              &dims_roi );

/* -------------------------------------------------------------------- */
/*      Handle JPIP Protocol request if we are using it.                */
/* -------------------------------------------------------------------- */
#ifdef USE_JPIP
        if( jpip_client != NULL )
        {
            kdu_window  window;

            window.region = dims_roi;
            window.resolution.x = nRasterXSize;
            window.resolution.y = nRasterYSize;
            window.set_num_components(1);
            window.components[0] = nBand - 1;
            window.max_layers = 0;

            jpip_client->post_window( &window );

            while( !jpip_client->is_idle() )
                CPLSleep( 0.25 );
            
            if( !jpip_client->is_alive() )
            {
                CPLError( CE_Failure, CPLE_AppDefined, 
                          "JPIP failure some time after post_window()." );
                return CE_Failure;
            }
        }
#endif
    
/* -------------------------------------------------------------------- */
/*      Now we are ready to walk through the tiles processing them      */
/*      one-by-one.                                                     */
/* -------------------------------------------------------------------- */
        kdu_dims tile_indices; 
        kdu_coords tpos;
        int  nWordSize = GDALGetDataTypeSize( eDataType ) / 8;
    
        oCodeStream.get_valid_tiles(tile_indices);
    
        for (tpos.y=0; tpos.y < tile_indices.size.y; tpos.y++)
        {
            for (tpos.x=0; tpos.x < tile_indices.size.x; tpos.x++)
            {
                kdu_tile tile = oCodeStream.open_tile(tpos+tile_indices.pos);

                kdu_resolution res = 
                    tile.access_component(0).access_resolution();
                kdu_dims tile_dims; res.get_dims(tile_dims);
                kdu_coords offset = tile_dims.pos - dims.pos;

                try 
                {
                    if( tile.get_ycc() && nBand < 4 )
                        ProcessYCbCrTile( tile, (GByte *) pImage,
                                          nBlockXOff, nBlockYOff,
                                          offset.x, offset.y );
                    else
                    {
                        GByte *pabyDest;
                        
                        pabyDest = ((GByte *)pImage) 
                            + (offset.x + offset.y*nBlockXSize) * nWordSize;

                        ProcessTile( tile, pabyDest );
                    }
                    tile.close();
                }
                catch( ... )
                {
                    tile.close();
                    return CE_Failure;
                }

            }
        }

        return CE_None;
    }
/* -------------------------------------------------------------------- */
/*      Catch interal Kakadu errors.                                    */
/* -------------------------------------------------------------------- */
    catch( ... )
    {
        return CE_Failure;
    }
}

/************************************************************************/
/*                            ProcessTile()                             */
/*                                                                      */
/*      Process data from one component of one tile into working        */
/*      buffer.                                                         */
/************************************************************************/

void JP2KAKRasterBand::ProcessTile( kdu_tile tile, GByte *pabyDest )

{
    // Open tile-components and create processing engines and resources
    kdu_dims dims;
    kdu_sample_allocator allocator;
    kdu_tile_comp comp = tile.access_component(nBand-1);
    kdu_line_buf line;
    kdu_pull_ifc engine;
    bool reversible = comp.get_reversible();
    int bit_depth = comp.get_bit_depth();
    kdu_resolution res = comp.access_resolution();
    int  nWordSize = GDALGetDataTypeSize( eDataType ) / 8;

    res.get_dims(dims);
    
    bool use_shorts = (comp.get_bit_depth(true) <= 16);

    line.pre_create(&allocator,dims.size.x,reversible,use_shorts);

    if (res.which() == 0) // No DWT levels used
        engine =
            kdu_decoder(res.access_subband(LL_BAND),&allocator,use_shorts);
    else
        engine = kdu_synthesis(res,&allocator,use_shorts);

    allocator.finalize(); // Actually creates buffering resources

    line.create(); // Grabs resources from the allocator.

    // Now walk through the lines of the buffer, recovering them from the
    // relevant tile-component processing engines.

    for( int y = 0; y < dims.size.y; y++ )
    {
        engine.pull(line,true);
        transfer_bytes(pabyDest + y * nBlockXSize * nWordSize,
                       line, nWordSize, bit_depth, eDataType );
    }

    engine.destroy();
}

/************************************************************************/
/*                          ProcessYCbCrTile()                          */
/*                                                                      */
/*      Process data from the Y, Cb and Cr components of a tile into    */
/*      RGB and then copy the desired red, green or blue portion out    */
/*      into the working buffer.                                        */
/************************************************************************/

void JP2KAKRasterBand::ProcessYCbCrTile( kdu_tile tile, GByte *pabyDest, 
                                         int nBlockXOff, int nBlockYOff,
                                         int nTileOffsetX, int nTileOffsetY )

{
    // Open tile-components and create processing engines and resources
    kdu_dims dims;
    kdu_sample_allocator allocator;
    kdu_tile_comp comp[3] = {tile.access_component(0),
                             tile.access_component(1),
                             tile.access_component(2)};
    kdu_line_buf line[3];
    kdu_pull_ifc engine[3];
    bool reversible = comp[0].get_reversible();
    int bit_depth = comp[0].get_bit_depth();
    kdu_resolution res = comp[0].access_resolution();
    int  nWordSize = GDALGetDataTypeSize( eDataType ) / 8;
    int  iComp;

/* -------------------------------------------------------------------- */
/*      Report if we are doing ycbcr processing, but only report        */
/*      once.                                                           */
/* -------------------------------------------------------------------- */
    if( !bYCbCrReported && nBand == 1 )
    {
        bYCbCrReported = TRUE;
        CPLDebug( "JP2KAK", "Using ProcessYCbCrTile() for this dataset." );
    }

/* -------------------------------------------------------------------- */
/*      Fetch the other color component blocks, so we can fill all      */
/*      three blocks at once.                                           */
/* -------------------------------------------------------------------- */
    int iBand;
    GByte *apabyBandDest[3];
    GDALRasterBlock *apoBlocks[3] = { NULL, NULL, NULL };

    for( iBand=0; iBand < 3; iBand++ )
    {
        if( nBand == iBand+1 )
            apabyBandDest[iBand] = pabyDest;
        else
        {
            GDALRasterBand *poBaseBand = poBaseDS->GetRasterBand(iBand+1);
            JP2KAKRasterBand *poBand = NULL;

            if( nDiscardLevels == 0 )
                poBand = (JP2KAKRasterBand *) poBaseBand;
            else
            {
                int iOver;

                for( iOver = 0; iOver < poBaseBand->GetOverviewCount(); iOver++ )
                {
                    poBand = (JP2KAKRasterBand *) 
                        poBaseBand->GetOverview( iOver );
                    if( poBand->nDiscardLevels == nDiscardLevels )
                        break;
                }
                if( iOver == poBaseBand->GetOverviewCount() )
                {
                    CPLAssert( FALSE );
                    return;
                }
            }

            apoBlocks[iBand] = 
                poBand->GetLockedBlockRef( nBlockXOff, nBlockYOff, TRUE );
            apabyBandDest[iBand] = (GByte *) apoBlocks[iBand]->GetDataRef();
        }
    }

/* -------------------------------------------------------------------- */
/*      Setup decoders.                                                 */
/* -------------------------------------------------------------------- */
    res.get_dims(dims);
    
    bool use_shorts = (comp[0].get_bit_depth(true) <= 16);

    for( iComp = 0; iComp < 3; iComp++ )
    {
        line[iComp].pre_create(&allocator,dims.size.x,reversible,use_shorts);

        if (res.which() == 0) // No DWT levels used
            engine[iComp] =
                kdu_decoder(comp[iComp].access_resolution().access_subband(LL_BAND),
                            &allocator,use_shorts);
        else
            engine[iComp] = 
                kdu_synthesis(comp[iComp].access_resolution(),&allocator,use_shorts);
    }

    allocator.finalize(); // Actually creates buffering resources

    for( iComp = 0; iComp < 3; iComp++ )
        line[iComp].create(); // Grabs resources from the allocator.

/* -------------------------------------------------------------------- */
/*      Now walk through the lines of the buffer, recovering them from the*/
/*      relevant tile-component processing engines.                     */
/* -------------------------------------------------------------------- */

    for( int y = 0; y < dims.size.y; y++ )
    {
        engine[0].pull(line[0],true);
        engine[1].pull(line[1],true);
        engine[2].pull(line[2],true);

        kdu_convert_ycc_to_rgb(line[0], line[1], line[2]);

        for( iBand = 0; iBand < 3; iBand++ )
            transfer_bytes(apabyBandDest[iBand] 
                           + (nTileOffsetX+(nTileOffsetY+y)*nBlockXSize)*nWordSize,
                           line[iBand], nWordSize, bit_depth, eDataType );
    }

/* -------------------------------------------------------------------- */
/*      Cleanup and release band locks.                                 */
/* -------------------------------------------------------------------- */
    engine[0].destroy();
    engine[1].destroy();
    engine[2].destroy();

    for( iBand = 0; iBand < 3; iBand++ )
    {
        if( apoBlocks[iBand] != NULL )
            apoBlocks[iBand]->DropLock();
    }
}

/************************************************************************/
/*                             IRasterIO()                              */
/************************************************************************/

CPLErr 
JP2KAKRasterBand::IRasterIO( GDALRWFlag eRWFlag,
                             int nXOff, int nYOff, int nXSize, int nYSize,
                             void * pData, int nBufXSize, int nBufYSize,
                             GDALDataType eBufType, 
                             int nPixelSpace,int nLineSpace )

{
/* -------------------------------------------------------------------- */
/*      We need various criteria to skip out to block based methods.    */
/* -------------------------------------------------------------------- */
    if( poBaseDS->TestUseBlockIO( nXOff, nYOff, nXSize, nYSize, 
                                  nBufXSize, nBufYSize,
                                  eBufType, 1, &nBand ) )
        return GDALPamRasterBand::IRasterIO( 
            eRWFlag, nXOff, nYOff, nXSize, nYSize,
            pData, nBufXSize, nBufYSize, eBufType, 
            nPixelSpace, nLineSpace );
    else
        return poBaseDS->DirectRasterIO( 
            eRWFlag, nXOff, nYOff, nXSize, nYSize,
            pData, nBufXSize, nBufYSize, eBufType, 
            1, &nBand, nPixelSpace, nLineSpace, 0 );
}

/************************************************************************/
/*                            ApplyPalette()                            */
/************************************************************************/

void JP2KAKRasterBand::ApplyPalette( jp2_palette oJP2Palette )

{
/* -------------------------------------------------------------------- */
/*      Do we have a reasonable LUT configuration?  RGB or RGBA?        */
/* -------------------------------------------------------------------- */
    if( !oJP2Palette.exists() )
        return;

    if( oJP2Palette.get_num_luts() == 0 || oJP2Palette.get_num_entries() == 0 )
        return;

    if( oJP2Palette.get_num_luts() < 3 )
    {
        CPLDebug( "JP2KAK", "JP2KAKRasterBand::ApplyPalette()\n"
                  "Odd get_num_luts() value (%d)", 
                  oJP2Palette.get_num_luts() );
        return;
    }

/* -------------------------------------------------------------------- */
/*      Fetch the lut entries.  Note that they are normalized in the    */
/*      -0.5 to 0.5 range.                                              */
/* -------------------------------------------------------------------- */
    float *pafLUT;
    int   iColor, nCount = oJP2Palette.get_num_entries();

    pafLUT = (float *) CPLCalloc(sizeof(float)*4, nCount);

    oJP2Palette.get_lut(0, pafLUT + 0);
    oJP2Palette.get_lut(1, pafLUT + nCount);
    oJP2Palette.get_lut(2, pafLUT + nCount*2);

    if( oJP2Palette.get_num_luts() == 4 )
    {
        oJP2Palette.get_lut( 2, pafLUT + nCount*3 );
    }
    else
    {
        for( iColor = 0; iColor < nCount; iColor++ )
        {
            pafLUT[nCount*3 + iColor] = 0.5;
        }
    }
    
/* -------------------------------------------------------------------- */
/*      Apply to GDAL colortable.                                       */
/* -------------------------------------------------------------------- */
    for( iColor=0; iColor < nCount; iColor++ )
    {
        GDALColorEntry sEntry;

        sEntry.c1 = (short) MAX(0,MIN(255,pafLUT[iColor + nCount*0]*256+128));
        sEntry.c2 = (short) MAX(0,MIN(255,pafLUT[iColor + nCount*1]*256+128));
        sEntry.c3 = (short) MAX(0,MIN(255,pafLUT[iColor + nCount*2]*256+128));
        sEntry.c4 = (short) MAX(0,MIN(255,pafLUT[iColor + nCount*3]*256+128));

        oCT.SetColorEntry( iColor, &sEntry );
    }

    CPLFree( pafLUT );

    eInterp = GCI_PaletteIndex;
}

/************************************************************************/
/*                       GetColorInterpretation()                       */
/************************************************************************/

GDALColorInterp JP2KAKRasterBand::GetColorInterpretation()

{
    return eInterp;
}

/************************************************************************/
/*                           GetColorTable()                            */
/************************************************************************/

GDALColorTable *JP2KAKRasterBand::GetColorTable()

{
    if( oCT.GetColorEntryCount() > 0 )
        return &oCT;
    else
        return NULL;
}

/************************************************************************/
/* ==================================================================== */
/*				JP2KAKDataset				*/
/* ==================================================================== */
/************************************************************************/

/************************************************************************/
/*                           JP2KAKDataset()                           */
/************************************************************************/

JP2KAKDataset::JP2KAKDataset()

{
    poInput = NULL;
    poRawInput = NULL;
    pszProjection = NULL;
    nGCPCount = 0;
    pasGCPList = NULL;
    family = NULL;

    bPreferNPReads = false;

    bGeoTransformValid = FALSE;
    adfGeoTransform[0] = 0.0;
    adfGeoTransform[1] = 1.0;
    adfGeoTransform[2] = 0.0;
    adfGeoTransform[3] = 0.0;
    adfGeoTransform[4] = 0.0;
    adfGeoTransform[5] = 1.0;

    poDriver = (GDALDriver*) GDALGetDriverByName( "JP2KAK" );
}

/************************************************************************/
/*                            ~JP2KAKDataset()                         */
/************************************************************************/

JP2KAKDataset::~JP2KAKDataset()

{
    FlushCache();

    CPLFree( pszProjection );
    
    if( nGCPCount > 0 )
    {
        GDALDeinitGCPs( nGCPCount, pasGCPList );
        CPLFree( pasGCPList );
    }

    if( poInput != NULL )
    {
        oCodeStream.destroy();
        poInput->close();
        delete poInput;
        if( family )
        {
            family->close();
            delete family;
        }
        if( poRawInput != NULL )
            delete poRawInput;
#ifdef USE_JPIP
        if( jpip_client != NULL )
        {
            jpip_client->close();
            delete jpip_client;
        }
#endif
    }

    if( poThreadEnv != NULL )
    {
        poThreadEnv->terminate(NULL,true);
        poThreadEnv->destroy();
        delete poThreadEnv;
    }
}


/************************************************************************/
/*                          GetProjectionRef()                          */
/************************************************************************/

const char *JP2KAKDataset::GetProjectionRef()

{
    if( pszProjection && *pszProjection )
        return( pszProjection );
    else
        return GDALPamDataset::GetProjectionRef();
}

/************************************************************************/
/*                          GetGeoTransform()                           */
/************************************************************************/

CPLErr JP2KAKDataset::GetGeoTransform( double * padfTransform )

{
    if( bGeoTransformValid )
    {
        memcpy( padfTransform, adfGeoTransform, sizeof(double)*6 );
    
        return CE_None;
    }
    else
        return GDALPamDataset::GetGeoTransform( padfTransform );
}

/************************************************************************/
/*                            GetGCPCount()                             */
/************************************************************************/

int JP2KAKDataset::GetGCPCount()

{
    return nGCPCount;
}

/************************************************************************/
/*                          GetGCPProjection()                          */
/************************************************************************/

const char *JP2KAKDataset::GetGCPProjection()

{
    if( nGCPCount > 0 )
        return pszProjection;
    else
        return "";
}

/************************************************************************/
/*                               GetGCP()                               */
/************************************************************************/

const GDAL_GCP *JP2KAKDataset::GetGCPs()

{
    return pasGCPList;
}

/************************************************************************/
/*                          IBuildOverviews()                           */
/************************************************************************/

CPLErr JP2KAKDataset::IBuildOverviews( const char *pszResampling, 
                                       int nOverviews, int *panOverviewList,
                                       int nListBands, int *panBandList, 
                                       GDALProgressFunc pfnProgress, 
                                       void *pProgressData )

{
/* -------------------------------------------------------------------- */
/*      In order for building external overviews to work properly we    */
/*      discard any concept of internal overviews when the user         */
/*      first requests to build external overviews.                     */
/* -------------------------------------------------------------------- */
    for( int iBand = 0; iBand < GetRasterCount(); iBand++ )
    {
        JP2KAKRasterBand *poBand = 
            (JP2KAKRasterBand *) GetRasterBand( iBand+1 );

        for( int i = 0; i < poBand->nOverviewCount; i++ )
            delete poBand->papoOverviewBand[i];

        CPLFree( poBand->papoOverviewBand );
        poBand->papoOverviewBand = NULL;
        poBand->nOverviewCount = 0;
    }

    return GDALPamDataset::IBuildOverviews( pszResampling, 
                                            nOverviews, panOverviewList, 
                                            nListBands, panBandList, 
                                            pfnProgress, pProgressData );
}

/************************************************************************/
/*                          KakaduInitialize()                          */
/************************************************************************/

void JP2KAKDataset::KakaduInitialize()

{
/* -------------------------------------------------------------------- */
/*      Initialize Kakadu warning/error reporting subsystem.            */
/* -------------------------------------------------------------------- */
    if( !kakadu_initialized )
    {
        kakadu_initialized = TRUE;

        kdu_cpl_error_message oErrHandler( CE_Failure );
        kdu_cpl_error_message oWarningHandler( CE_Warning );
        
        kdu_customize_warnings(new kdu_cpl_error_message( CE_Warning ) );
        kdu_customize_errors(new kdu_cpl_error_message( CE_Failure ) );
    }
}

/************************************************************************/
/*                              Identify()                              */
/************************************************************************/

int JP2KAKDataset::Identify( GDALOpenInfo * poOpenInfo )

{
/* -------------------------------------------------------------------- */
/*      Check header                                                    */
/* -------------------------------------------------------------------- */
    if( poOpenInfo->nHeaderBytes < (int) sizeof(jp2_header) )
    {
        const char  *pszExtension = NULL;

        pszExtension = CPLGetExtension( poOpenInfo->pszFilename );
        if( (EQUALN(poOpenInfo->pszFilename,"http://",7)
             || EQUALN(poOpenInfo->pszFilename,"https://",8)
             || EQUALN(poOpenInfo->pszFilename,"jpip://",7))
            && EQUAL(pszExtension,"jp2") )
            return TRUE;
        else if( EQUALN(poOpenInfo->pszFilename,"J2K_SUBFILE:",12) )
            return TRUE;
        else
            return FALSE;
    }

/* -------------------------------------------------------------------- */
/*      Any extension is supported for JP2 files.  Only selected        */
/*      extensions are supported for JPC files since the standard       */
/*      prefix is so short (two bytes).                                 */
/* -------------------------------------------------------------------- */
    if( memcmp(poOpenInfo->pabyHeader,jp2_header,sizeof(jp2_header)) == 0 )
        return TRUE;
    else if( memcmp( poOpenInfo->pabyHeader, jpc_header, 
                     sizeof(jpc_header) ) == 0 )
    {
        const char  *pszExtension = NULL;

        pszExtension = CPLGetExtension( poOpenInfo->pszFilename );
        if( EQUAL(pszExtension,"jpc") 
            || EQUAL(pszExtension,"j2k") 
            || EQUAL(pszExtension,"jp2") 
            || EQUAL(pszExtension,"jpx") 
            || EQUAL(pszExtension,"j2c") )
           return TRUE;

        // We also want to handle jpc datastreams vis /vsisubfile.
        if( strstr(poOpenInfo->pszFilename,"vsisubfile") != NULL )
            return TRUE;
    }

    return FALSE;
}

/************************************************************************/
/*                                Open()                                */
/************************************************************************/

GDALDataset *JP2KAKDataset::Open( GDALOpenInfo * poOpenInfo )

{
    subfile_source *poRawInput = NULL;
    const char  *pszExtension = NULL;
    int         bIsJPIP = FALSE;
    int         bIsSubfile = FALSE;
    GByte      *pabyHeader = NULL;

    if( !Identify( poOpenInfo ) )
        return NULL;

/* -------------------------------------------------------------------- */
/*      Handle setting up datasource for JPIP.                          */
/* -------------------------------------------------------------------- */
    KakaduInitialize();
        
    pszExtension = CPLGetExtension( poOpenInfo->pszFilename );
    if( poOpenInfo->nHeaderBytes < 16 )
    {
        if( (EQUALN(poOpenInfo->pszFilename,"http://",7)
             || EQUALN(poOpenInfo->pszFilename,"https://",8)
             || EQUALN(poOpenInfo->pszFilename,"jpip://",7))
            && EQUAL(pszExtension,"jp2") )
        {
            bIsJPIP = TRUE;
        }
        else if( EQUALN(poOpenInfo->pszFilename,"J2K_SUBFILE:",12) )
        {
            static GByte abySubfileHeader[16];

            try
            {
                poRawInput = new subfile_source;
                poRawInput->open( poOpenInfo->pszFilename );
                poRawInput->seek( 0 );

                poRawInput->read( abySubfileHeader, 16 );
                poRawInput->seek( 0 );
            }
            catch( ... )
            {
                return NULL;
            }

            pabyHeader = abySubfileHeader;

            bIsSubfile = TRUE;
        }
        else
            return NULL;
    }
    else
    {
        pabyHeader = poOpenInfo->pabyHeader;
    }

/* -------------------------------------------------------------------- */
/*      If we think this should be access via vsil, then open it        */
/*      accordingly.                                                    */
/* -------------------------------------------------------------------- */
    if( poOpenInfo->fp == NULL
        && poRawInput == NULL
        && !bIsJPIP )
    {
        try
        {
            poRawInput = new subfile_source;
            poRawInput->open( poOpenInfo->pszFilename );
            poRawInput->seek( 0 );
        }
        catch( ... )
        {
            return NULL;
        }
    }

/* -------------------------------------------------------------------- */
/*      If the header is a JP2 header, mark this as a JP2 dataset.      */
/* -------------------------------------------------------------------- */
    if( pabyHeader && memcmp(pabyHeader,jp2_header,sizeof(jp2_header)) == 0 )
        pszExtension = "jp2";

/* -------------------------------------------------------------------- */
/*      Try to open the file in a manner depending on the extension.    */
/* -------------------------------------------------------------------- */
    kdu_compressed_source *poInput = NULL;
    kdu_client      *jpip_client = NULL;
    jp2_palette oJP2Palette;
    jp2_channels oJP2Channels;

    jp2_family_src *family = NULL;

    try
    {
        if( bIsJPIP )
        {
#ifdef USE_JPIP
            jp2_source *jp2_src;
            char *pszWrk = CPLStrdup(strstr(poOpenInfo->pszFilename,"://")+3);
            char *pszRequest = strstr(pszWrk,"/");
     
            if( pszRequest == NULL )
            {
                CPLDebug( "JP2KAK", 
                          "Failed to parse JPIP server and request." );
                CPLFree( pszWrk );
                return NULL;
            }

            *(pszRequest++) = '\0';

            CPLDebug( "JP2KAK", "server=%s, request=%s", 
                      pszWrk, pszRequest );

            CPLSleep( 15.0 );
            jpip_client = new kdu_client;
            jpip_client->connect( pszWrk, NULL, pszRequest, "http-tcp", 
                                  "" );
            
            CPLDebug( "JP2KAK", "After connect()" );

            bool bin0_complete = false;

            while( jpip_client->get_databin_length(KDU_META_DATABIN,0,0,
                                                   &bin0_complete) <= 0 
                   || !bin0_complete )
                CPLSleep( 0.25 );

            family = new jp2_family_src;
            family->open( jpip_client );

            jp2_src = new jp2_source;
            jp2_src->open( family );
            jp2_src->read_header();

            while( !jpip_client->is_idle() )
                CPLSleep( 0.25 );

            if( jpip_client->is_alive() )
                CPLDebug( "JP2KAK", "connect() seems to be complete." );
            else
            {
                CPLDebug( "JP2KAK", "connect() seems to have failed." );
                return NULL;
            }

            oJP2Channels = jp2_src->access_channels();

            poInput = jp2_src;
#else
            CPLError( CE_Failure, CPLE_OpenFailed, 
                      "JPIP Protocol not supported by GDAL with Kakadu 3.4 or on Unix." );
#endif
        }
        else if( pszExtension != NULL
                 && (EQUAL(pszExtension,"jp2") || EQUAL(pszExtension,"jpx")) )
        {
            jp2_source *jp2_src;

            family = new jp2_family_src;
            if( poRawInput != NULL )
                family->open( poRawInput );
            else
                family->open( poOpenInfo->pszFilename, true );
            jp2_src = new jp2_source;
            jp2_src->open( family );
            jp2_src->read_header();

            poInput = jp2_src;

            oJP2Palette = jp2_src->access_palette();
            oJP2Channels = jp2_src->access_channels();

            jp2_colour oColors = jp2_src->access_colour();
            if( oColors.get_space() != JP2_sRGB_SPACE
                && oColors.get_space() != JP2_sLUM_SPACE )
            {
                CPLDebug( "JP2KAK", "Unusual ColorSpace=%d, not further interpreted.", 
                          (int) oColors.get_space() );
            }
        }
        else if( poRawInput == NULL )
        {
            poInput = new kdu_simple_file_source( poOpenInfo->pszFilename );
        }
        else
        {
            poInput = poRawInput;
            poRawInput = NULL;
        }
    }
    catch( ... )
    {
        CPLDebug( "JP2KAK", "Trapped Kakadu exception." );
        return NULL;
    }

/* -------------------------------------------------------------------- */
/*      Create a corresponding GDALDataset.                             */
/* -------------------------------------------------------------------- */
    JP2KAKDataset 	*poDS = NULL;

    try
    {
        poDS = new JP2KAKDataset();

        poDS->poInput = poInput;
        poDS->poRawInput = poRawInput;
        poDS->oCodeStream.create( poInput );
        poDS->oCodeStream.set_fussy();
//        poDS->oCodeStream.set_resilient();
        poDS->oCodeStream.set_persistent();

        poDS->jpip_client = jpip_client;

        poDS->family = family;

/* -------------------------------------------------------------------- */
/*      Get overall image size.                                         */
/* -------------------------------------------------------------------- */
        poDS->oCodeStream.get_dims( 0, poDS->dims );
        
        poDS->nRasterXSize = poDS->dims.size.x;
        poDS->nRasterYSize = poDS->dims.size.y;

/* -------------------------------------------------------------------- */
/*      Ensure that all the components have the same dimensions.  If    */
/*      not, just process the first dimension.                          */
/* -------------------------------------------------------------------- */
        poDS->nBands = poDS->oCodeStream.get_num_components();

        if (poDS->nBands > 1 )
        { 
            int iDim;
        
            for( iDim = 1; iDim < poDS->nBands; iDim++ )
            {
                kdu_dims  dim_this_comp;
            
                poDS->oCodeStream.get_dims(iDim, dim_this_comp);

                if( dim_this_comp != poDS->dims )
                {
                    CPLError( CE_Warning, CPLE_AppDefined,
                              "Some components have mismatched dimensions, "
                              "ignoring all but first." );
                    poDS->nBands = 1;
                    break;
                }
            }
        }

/* -------------------------------------------------------------------- */
/*      Setup the thread environment.                                   */
/* -------------------------------------------------------------------- */
        int nNumThreads = atoi(CPLGetConfigOption("JP2KAK_THREADS","-1"));
        if( nNumThreads == -1 )
            nNumThreads = kdu_get_num_processors()-1;

        if( nNumThreads > 0 )
        {
            int iThread;

            poDS->poThreadEnv = new kdu_thread_env;
            poDS->poThreadEnv->create();

            for( iThread=0; iThread < nNumThreads; iThread++ )
            {
                if( !poDS->poThreadEnv->add_thread() )
                    break;
            }
            CPLDebug( "JP2KAK", "Using %d threads.", nNumThreads );
        }
        else
            CPLDebug( "JP2KAK", "Operating in singlethreaded mode." );

/* -------------------------------------------------------------------- */
/*      Is this a file with poor internal navigation that will end      */
/*      up using a great deal of memory if we use keep persistent       */
/*      parsed information around?  (#3295)                             */
/* -------------------------------------------------------------------- */
        siz_params *siz = poDS->oCodeStream.access_siz();
        kdu_params *cod = siz->access_cluster(COD_params);
        bool use_precincts; 
        
        cod->get(Cuse_precincts,0,0,use_precincts);

        const char *pszPersist = CPLGetConfigOption( "JP2KAK_PERSIST", "AUTO");
        if( EQUAL(pszPersist,"AUTO") )
        {
            if( !use_precincts && !bIsJPIP
                && (poDS->nRasterXSize * (double) poDS->nRasterYSize) 
                > 100000000.0 )
                poDS->bPreferNPReads = true;
        }
        else 
            poDS->bPreferNPReads = !CSLTestBoolean(pszPersist);

        CPLDebug( "JP2KAK", "Cuse_precincts=%d, PreferNonPersistentReads=%d", 
                  (int) use_precincts, poDS->bPreferNPReads );

/* -------------------------------------------------------------------- */
/*      find out how many resolutions levels are available.             */
/* -------------------------------------------------------------------- */
        kdu_dims tile_indices; 
        poDS->oCodeStream.get_valid_tiles(tile_indices);

        kdu_tile tile = poDS->oCodeStream.open_tile(tile_indices.pos);
        poDS->nResCount = tile.access_component(0).get_num_resolutions();
        tile.close();

        CPLDebug( "JP2KAK", "nResCount=%d", poDS->nResCount );

/* -------------------------------------------------------------------- */
/*      Create band information objects.                                */
/* -------------------------------------------------------------------- */
        int iBand;
    
        for( iBand = 1; iBand <= poDS->nBands; iBand++ )
        {
            JP2KAKRasterBand *poBand = 
                new JP2KAKRasterBand(iBand,0,poDS->oCodeStream,poDS->nResCount,
                                     jpip_client, oJP2Channels, poDS );

            if( iBand == 1 && oJP2Palette.exists() )
                poBand->ApplyPalette( oJP2Palette );

            poDS->SetBand( iBand, poBand );
        }

/* -------------------------------------------------------------------- */
/*      Look for supporting coordinate system information.              */
/* -------------------------------------------------------------------- */
        if( poOpenInfo->nHeaderBytes > 0 )
        {
            GDALJP2Metadata oJP2Geo;
        
            if( oJP2Geo.ReadAndParse( poOpenInfo->pszFilename ) )
            {
                poDS->pszProjection = CPLStrdup(oJP2Geo.pszProjection);
                poDS->bGeoTransformValid = TRUE;
                memcpy( poDS->adfGeoTransform, oJP2Geo.adfGeoTransform, 
                        sizeof(double) * 6 );
                poDS->nGCPCount = oJP2Geo.nGCPCount;
                poDS->pasGCPList = oJP2Geo.pasGCPList;
                oJP2Geo.pasGCPList = NULL;
                oJP2Geo.nGCPCount = 0;
            }

/* -------------------------------------------------------------------- */
/*      Do we have any XML boxes we would like to treat as special      */
/*      domain metadata?                                                */
/* -------------------------------------------------------------------- */
            int iBox;

            for( iBox = 0; 
                 oJP2Geo.papszGMLMetadata
                     && oJP2Geo.papszGMLMetadata[iBox] != NULL; 
                 iBox++ )
            {
                char *pszName = NULL;
                const char *pszXML = 
                    CPLParseNameValue( oJP2Geo.papszGMLMetadata[iBox], 
                                       &pszName );
                CPLString osDomain;
                char *apszMDList[2];

                osDomain.Printf( "xml:%s", pszName );
                apszMDList[0] = (char *) pszXML;
                apszMDList[1] = NULL;

                poDS->GDALPamDataset::SetMetadata( apszMDList, osDomain );

                CPLFree( pszName );
            }
        }

/* -------------------------------------------------------------------- */
/*      Establish our corresponding physical file.                      */
/* -------------------------------------------------------------------- */
        CPLString osPhysicalFilename = poOpenInfo->pszFilename;

        if( bIsSubfile || EQUALN(poOpenInfo->pszFilename,"/vsisubfile/",12) )
        {
            if( strstr(poOpenInfo->pszFilename,",") != NULL )
                osPhysicalFilename = strstr(poOpenInfo->pszFilename,",") + 1;
        }

/* -------------------------------------------------------------------- */
/*      Initialize any PAM information.                                 */
/* -------------------------------------------------------------------- */
        poDS->SetDescription( poOpenInfo->pszFilename );
        if( !bIsSubfile )
            poDS->TryLoadXML();
        else
            poDS->nPamFlags |= GPF_NOSAVE;

/* -------------------------------------------------------------------- */
/*      Do we have PAM information to override other geo-info?          */
/* -------------------------------------------------------------------- */
        poDS->PamOverride();

        if( !poDS->bGeoTransformValid )
            poDS->bGeoTransformValid = 
                GDALReadWorldFile( poOpenInfo->pszFilename, 0, 
                                   poDS->adfGeoTransform );

/* -------------------------------------------------------------------- */
/*      Check for external overviews.                                   */
/* -------------------------------------------------------------------- */
        poDS->oOvManager.Initialize( poDS, osPhysicalFilename );
    
/* -------------------------------------------------------------------- */
/*      Confirm the requested access is supported.                      */
/* -------------------------------------------------------------------- */
        if( poOpenInfo->eAccess == GA_Update )
        {
            delete poDS;
            CPLError( CE_Failure, CPLE_NotSupported, 
                      "The JP2KAK driver does not support update access to existing"
                      " datasets.\n" );
            return NULL;
        }
    
        return( poDS );
    }

/* -------------------------------------------------------------------- */
/*      Catch all fatal kakadu errors and cleanup a bit.                */
/* -------------------------------------------------------------------- */
    catch( ... )
    {
        CPLDebug( "JP2KAK", "JP2KAKDataset::Open() - caught exception." );
        if( poDS != NULL )
            delete poDS;

        return NULL;
    }
}

/************************************************************************/
/*                            PamOverride()                             */
/*                                                                      */
/*      Override geolocation information from PAM if there is PAM       */
/*      geolocation information.                                        */
/************************************************************************/

void JP2KAKDataset::PamOverride()

{
    if( strlen(GDALPamDataset::GetProjectionRef()) > 0 )
    {
        CPLFree( pszProjection );
        pszProjection = CPLStrdup(GDALPamDataset::GetProjectionRef());
    }

    double adfPamGT[6];
    if( GDALPamDataset::GetGeoTransform( adfPamGT ) == CE_None )
    {
        memcpy( adfGeoTransform, adfPamGT, sizeof(double) * 6 );
        bGeoTransformValid = TRUE;
    }

    if( GDALPamDataset::GetGCPCount() > 0 )
    {
        if( nGCPCount > 0 )
        {
            GDALDeinitGCPs( nGCPCount, pasGCPList );
            CPLFree( pasGCPList );
        }

        nGCPCount = GDALPamDataset::GetGCPCount();
        pasGCPList = GDALDuplicateGCPs( nGCPCount, GDALPamDataset::GetGCPs() );
        CPLFree( pszProjection );
        pszProjection = CPLStrdup(GDALPamDataset::GetGCPProjection());
    }
}

/************************************************************************/
/*                           DirectRasterIO()                           */
/************************************************************************/

CPLErr 
JP2KAKDataset::DirectRasterIO( GDALRWFlag eRWFlag,
                               int nXOff, int nYOff, int nXSize, int nYSize,
                               void * pData, int nBufXSize, int nBufYSize,
                               GDALDataType eBufType, 
                               int nBandCount, int *panBandMap,
                               int nPixelSpace,int nLineSpace,int nBandSpace)
    
{
    kdu_codestream *poCodeStream = &oCodeStream;
    const char *pszPersistency = "";

    CPLAssert( eBufType == GDT_Byte 
               || eBufType == GDT_Int16
               || eBufType == GDT_UInt16 );

/* -------------------------------------------------------------------- */
/*      Do we want to do this non-persistently?  If so, we need to      */
/*      open the file, and establish a local codestream.                */
/* -------------------------------------------------------------------- */
    subfile_source subfile_src;
    jp2_source wrk_jp2_src;
    jp2_family_src wrk_family;
    kdu_codestream oWCodeStream;

    if( bPreferNPReads )
    {
        subfile_src.open( GetDescription() );
        
        if( family != NULL )
        {
            wrk_family.open( &subfile_src );
            wrk_jp2_src.open( &wrk_family );
            wrk_jp2_src.read_header();

            oWCodeStream.create( &wrk_jp2_src );
        }
        else
        {
            oWCodeStream.create( &subfile_src );
        }

        oWCodeStream.set_fussy();

        poCodeStream= &oWCodeStream;
        
        pszPersistency = "(non-persistent)";
    }

/* -------------------------------------------------------------------- */
/*      Select optimal resolution level.                                */
/* -------------------------------------------------------------------- */
    int nDiscardLevels = 0;
    int nResMult = 1;

    while( nDiscardLevels < nResCount - 1 
           && nBufXSize * nResMult * 2 < nXSize * 1.01
           && nBufYSize * nResMult * 2 < nYSize * 1.01 )
    {
        nDiscardLevels++;
        nResMult = nResMult * 2;
    }

/* -------------------------------------------------------------------- */
/*      Prepare component indices list.                                 */
/* -------------------------------------------------------------------- */
    CPLErr eErr=CE_None;
    int *component_indices;
    int *stripe_heights, *sample_offsets, *sample_gaps, *row_gaps, *precisions;
    bool *is_signed;
    int i;
    
    component_indices = (int *) CPLMalloc(sizeof(int) * nBandCount);
    stripe_heights = (int *) CPLMalloc(sizeof(int) * nBandCount);
    sample_offsets = (int *) CPLMalloc(sizeof(int) * nBandCount);
    sample_gaps = (int *) CPLMalloc(sizeof(int) * nBandCount);
    row_gaps = (int *) CPLMalloc(sizeof(int) * nBandCount);
    precisions = (int *) CPLMalloc(sizeof(int) * nBandCount);
    is_signed = (bool *) CPLMalloc(sizeof(bool) * nBandCount);

    for( i = 0; i < nBandCount; i++ )
        component_indices[i] = panBandMap[i] - 1;

/* -------------------------------------------------------------------- */
/*      Setup a ROI matching the block requested, and select desired    */
/*      bands (components).                                             */
/* -------------------------------------------------------------------- */
    try
    {
        kdu_dims dims;
        poCodeStream->apply_input_restrictions( 0, 0, nDiscardLevels, 0, NULL );
        poCodeStream->get_dims( 0, dims );

        dims.pos.x = dims.pos.x + nXOff/nResMult;
        dims.pos.y = dims.pos.y + nYOff/nResMult;
        dims.size.x = nXSize/nResMult;
        dims.size.y = nYSize/nResMult;
    
        kdu_dims dims_roi;

        poCodeStream->map_region( 0, dims, dims_roi );
        poCodeStream->apply_input_restrictions( nBandCount, component_indices, 
                                              nDiscardLevels, 0, &dims_roi,
                                              KDU_WANT_OUTPUT_COMPONENTS);

/* -------------------------------------------------------------------- */
/*      Special case where the data is being requested exactly at       */
/*      this resolution.  Avoid any extra sampling pass.                */
/* -------------------------------------------------------------------- */
        if( nBufXSize == dims.size.x && nBufYSize == dims.size.y )
        {
            kdu_stripe_decompressor decompressor;
            decompressor.start(*poCodeStream,false,false,poThreadEnv);
        
            CPLDebug( "JP2KAK", "DirectRasterIO() for %d,%d,%d,%d -> %dx%d (no intermediate) %s",
                      nXOff, nYOff, nXSize, nYSize, nBufXSize, nBufYSize,
                      pszPersistency );

            for( i = 0; i < nBandCount; i++ )
            {
                stripe_heights[i] = dims.size.y;
                if( eBufType == GDT_Byte )
                {
                    precisions[i] = 8;
                    is_signed[i] = false;
                    sample_offsets[i] = i * nBandSpace;
                    sample_gaps[i] = nPixelSpace;
                    row_gaps[i] = nLineSpace;
                }
                else if( eBufType == GDT_Int16 )
                {
                    precisions[i] = poCodeStream->get_bit_depth(i);
                    is_signed[i] = true;
                    sample_offsets[i] = i * nBandSpace / 2;
                    sample_gaps[i] = nPixelSpace / 2;
                    row_gaps[i] = nLineSpace / 2;
                }
                else if( eBufType == GDT_UInt16 )
                {
                    precisions[i] = poCodeStream->get_bit_depth(i);
                    is_signed[i] = false;
                    sample_offsets[i] = i * nBandSpace / 2;
                    sample_gaps[i] = nPixelSpace / 2;
                    row_gaps[i] = nLineSpace / 2;
                }
                
            }

            if( precisions[0] == 8 )
                decompressor.pull_stripe( (kdu_byte *) pData, stripe_heights,
                                          sample_offsets, sample_gaps, row_gaps );
            else
                decompressor.pull_stripe( (kdu_int16 *) pData, stripe_heights,
                                          sample_offsets, sample_gaps,row_gaps,
                                          precisions, is_signed );
            decompressor.finish();
        }

/* -------------------------------------------------------------------- */
/*      More general case - first pull into working buffer.             */
/* -------------------------------------------------------------------- */
        else
        {
            GByte *pabyIntermediate = (GByte *) 
                VSIMalloc3(dims.size.x, dims.size.y, 2*nBandCount );
            if( pabyIntermediate == NULL )
            {
                CPLError( CE_Failure, CPLE_OutOfMemory, 
                          "Failed to allocate %d byte intermediate decompression buffer for jpeg2000.", 
                          dims.size.x * dims.size.y * nBandCount );

                return CE_Failure;
            }

            CPLDebug( "JP2KAK", 
                      "DirectRasterIO() for %d,%d,%d,%d -> %dx%d -> %dx%d %s",
                      nXOff, nYOff, nXSize, nYSize, 
                      dims.size.x, dims.size.y, 
                      nBufXSize, nBufYSize, 
                      pszPersistency );

            kdu_stripe_decompressor decompressor;
            decompressor.start(*poCodeStream,false,false,poThreadEnv);
        
            for( i = 0; i < nBandCount; i++ )
            {
                stripe_heights[i] = dims.size.y;

                if( eBufType == GDT_Int16 || eBufType == GDT_UInt16 )
                {
                    precisions[i] = poCodeStream->get_bit_depth(i);
                    
                    if( eBufType == GDT_Int16 )
                        is_signed[i] = true;
                    else
                        is_signed[i] = false;
                }
            }
            
            if( eBufType == GDT_Byte )
                decompressor.pull_stripe( (kdu_byte *) pabyIntermediate, 
                                          stripe_heights );
            else
                decompressor.pull_stripe( (kdu_int16 *) pabyIntermediate, 
                                          stripe_heights,
                                          NULL, NULL, NULL,
                                          precisions, is_signed );
                
            decompressor.finish();

/* -------------------------------------------------------------------- */
/*      Then resample (normally downsample) from the intermediate       */
/*      buffer into the final buffer in the desired output layout.      */
/* -------------------------------------------------------------------- */
            int iY, iX;
            double dfYRatio = dims.size.y / (double) nBufYSize;
            double dfXRatio = dims.size.x / (double) nBufXSize;

            for( iY = 0; iY < nBufYSize; iY++ )
            {
                int iSrcY = (int) floor( (iY + 0.5) * dfYRatio );

                iSrcY = MIN(iSrcY, dims.size.y-1);

                for( iX = 0; iX < nBufXSize; iX++ )
                {
                    int iSrcX = (int) floor( (iX + 0.5) * dfXRatio );

                    iSrcX = MIN(iSrcX, dims.size.x-1);

                    for( i = 0; i < nBandCount; i++ )
                    {
                        if( eBufType == GDT_Byte )
                            ((GByte *) pData)[iX*nPixelSpace
                                              + iY*nLineSpace
                                              + i*nBandSpace] = 
                                pabyIntermediate[iSrcX*nBandCount
                                                 + iSrcY*dims.size.x*nBandCount
                                                 + i];
                        else if( eBufType == GDT_Int16
                                 || eBufType == GDT_UInt16 )
                            ((GUInt16 *) pData)[iX*nPixelSpace/2
                                              + iY*nLineSpace/2
                                              + i*nBandSpace/2] = 
                                ((GUInt16 *)pabyIntermediate)[
                                    iSrcX*nBandCount
                                    + iSrcY*dims.size.x*nBandCount
                                    + i];
                    }
                }
            }

            CPLFree( pabyIntermediate );
        }
    }
/* -------------------------------------------------------------------- */
/*      Catch interal Kakadu errors.                                    */
/* -------------------------------------------------------------------- */
    catch( ... )
    {
        eErr = CE_Failure;
    }

/* -------------------------------------------------------------------- */
/*      Cleanup                                                         */
/* -------------------------------------------------------------------- */
    if( poCodeStream == &oWCodeStream )
    {
        oWCodeStream.destroy();
        wrk_jp2_src.close();
        wrk_family.close();
        subfile_src.close();
    }

    CPLFree( component_indices );
    CPLFree( stripe_heights );
    CPLFree( sample_offsets );
    CPLFree( sample_gaps );
    CPLFree( row_gaps );
    CPLFree( precisions );
    CPLFree( is_signed);

    return eErr;
}

/************************************************************************/
/*                           TestUseBlockIO()                           */
/*                                                                      */
/*      Check whether we should use blocked IO (true) or direct io      */
/*      (FALSE) for a given request configuration and environment.      */
/************************************************************************/

int 
JP2KAKDataset::TestUseBlockIO( int nXOff, int nYOff, int nXSize, int nYSize,
                               int nBufXSize, int nBufYSize,
                               GDALDataType eDataType, 
                               int nBandCount, int *panBandList )

{
/* -------------------------------------------------------------------- */
/*      Due to limitations in DirectRasterIO() we can only handle       */
/*      8bit and with no duplicates in the band list.                   */
/* -------------------------------------------------------------------- */
    if( eDataType != GetRasterBand(1)->GetRasterDataType()
        || ( eDataType != GDT_Byte
             && eDataType != GDT_Int16
             && eDataType != GDT_UInt16 ) )
        return TRUE;

    int i, j; 
    
    for( i = 0; i < nBandCount; i++ )
    {
        for( j = i+1; j < nBandCount; j++ )
            if( panBandList[j] == panBandList[i] )
                return TRUE;
    }

/* -------------------------------------------------------------------- */
/*      If we have external overviews built, and they could be used     */
/*      to satisfy this request, we will avoid DirectRasterIO()         */
/*      which would ignore them.                                        */
/* -------------------------------------------------------------------- */
    if( GetRasterCount() == 0 )
        return TRUE;

    JP2KAKRasterBand *poWrkBand = (JP2KAKRasterBand*) GetRasterBand(1);
    if( poWrkBand->HasExternalOverviews() ) 
    {
        int    nOverview;
        int    nXOff2=nXOff, nYOff2=nYOff, nXSize2=nXSize, nYSize2=nYSize;

        nOverview =
            GDALBandGetBestOverviewLevel( poWrkBand, 
                                          nXOff2, nYOff2, nXSize2, nYSize2,
                                          nBufXSize, nBufYSize);
        if (nOverview >= 0 )
            return TRUE;
    }

/* -------------------------------------------------------------------- */
/*      The rest of the rules are io strategy stuff, and use            */
/*      configuration checks.                                           */
/* -------------------------------------------------------------------- */
    int bUseBlockedIO = bForceCachedIO;

    if( nYSize == 1 || nXSize * ((double) nYSize) < 100.0 )
        bUseBlockedIO = TRUE;

    if( nBufYSize == 1 || nBufXSize * ((double) nBufYSize) < 100.0 )
        bUseBlockedIO = TRUE;

    if( strlen(CPLGetConfigOption( "GDAL_ONE_BIG_READ", "")) > 0 )
        bUseBlockedIO = 
            !CSLTestBoolean(CPLGetConfigOption( "GDAL_ONE_BIG_READ", ""));

    return bUseBlockedIO;
}

/************************************************************************/
/*                             IRasterIO()                              */
/************************************************************************/

CPLErr JP2KAKDataset::IRasterIO( GDALRWFlag eRWFlag,
                                 int nXOff, int nYOff, int nXSize, int nYSize,
                                 void * pData, int nBufXSize, int nBufYSize,
                                 GDALDataType eBufType, 
                                 int nBandCount, int *panBandMap,
                                 int nPixelSpace,int nLineSpace,int nBandSpace)

{
/* -------------------------------------------------------------------- */
/*      We need various criteria to skip out to block based methods.    */
/* -------------------------------------------------------------------- */
    if( TestUseBlockIO( nXOff, nYOff, nXSize, nYSize, nBufXSize, nBufYSize,
                        eBufType, nBandCount, panBandMap ) )
        return GDALPamDataset::IRasterIO( 
            eRWFlag, nXOff, nYOff, nXSize, nYSize,
            pData, nBufXSize, nBufYSize, eBufType, 
            nBandCount, panBandMap, nPixelSpace, nLineSpace, nBandSpace );
    else
        return DirectRasterIO( 
            eRWFlag, nXOff, nYOff, nXSize, nYSize,
            pData, nBufXSize, nBufYSize, eBufType, 
            nBandCount, panBandMap, nPixelSpace, nLineSpace, nBandSpace );
}

/************************************************************************/
/*                           transfer_bytes()                           */
/*                                                                      */
/*      Support function for JP2KAKRasterBand::ProcessTile().           */
/************************************************************************/

static void
transfer_bytes(kdu_byte *dest, kdu_line_buf &src, int gap, int precision,
               GDALDataType eOutType )

  /* Transfers source samples from the supplied line buffer into the output
     byte buffer, spacing successive output samples apart by `gap' bytes
     (to allow for interleaving of colour components).  The function performs
     all necessary level shifting, type conversion, rounding and truncation. */
{
    int width = src.get_width();
    if (src.get_buf32() != NULL)
    { // Decompressed samples have a 32-bit representation (integer or float)
        assert(precision >= 8); // Else would have used 16 bit representation
        kdu_sample32 *sp = src.get_buf32();
        if (!src.is_absolute() && eOutType != GDT_Byte )
        { // Transferring normalized floating point data, but preserving 
          // precision.
            float scale16 = (float)(1<<precision);
            float offset = (1<<(precision-1));
            int val;

            for (; width > 0; width--, sp++, dest+=gap)
            {
                if( eOutType == GDT_Int16 )
                {
                    val = (int) (sp->fval*scale16);
                    *((GInt16 *) dest) = (GInt16) MAX(MIN(val,32767),-32768);
                }
                else if( eOutType == GDT_UInt16 )
                {
                    val = (int) (sp->fval*scale16 + offset);
                    *((GUInt16 *) dest) = (GUInt16) MAX(MIN(val,65535),0);
                }
                else if( eOutType == GDT_Float32 )
                    *((float *) dest) = sp->fval;
            }
        }
        else if (!src.is_absolute())
        { // Transferring normalized floating point data.
            float scale16 = (float)(1<<16);
            kdu_int32 val;

            for (; width > 0; width--, sp++, dest+=gap)
            {
                val = (kdu_int32)(sp->fval*scale16);
                val = (val+128)>>8; // May be faster than true rounding
                val += 128;
                if (val & ((-1)<<8))
                    val = (val<0)?0:255;
                *dest = (kdu_byte) val;
            }
        }
        else if( eOutType == GDT_Int16 || eOutType == GDT_UInt16 )
        { // Transferring 32-bit absolute integers.
            kdu_int32 val;
              
            for (; width > 0; width--, sp++, dest+=gap)
            {
                val = sp->ival;

                if( eOutType == GDT_Int16 )
                {
                    *((GInt16 *) dest) = (GInt16) MAX(MIN(val,32767),-32768);
                }
                else
                {
                    val += 32768;

                    assert( eOutType == GDT_UInt16 );
                    *((GUInt16 *) dest) = (GUInt16) MAX(MIN(val,65535),0);
                }
            }
        }
        else
        { // Transferring 32-bit absolute integers.
            kdu_int32 val;
            kdu_int32 downshift = precision-8;
            kdu_int32 offset = (1<<downshift)>>1;

            for (; width > 0; width--, sp++, dest+=gap)
            {
                val = sp->ival;
                val = (val+offset)>>downshift;
                val += 128;

                if (val & ((-1)<<8))
                    val = (val<0)?0:255;
                *dest = (kdu_byte) val;
            }
        }
    }
    else if( eOutType == GDT_Byte )
    { // Source data is 16 bits.
        kdu_sample16 *sp = src.get_buf16();
        if (!src.is_absolute())
        { // Transferring 16-bit fixed point quantities
            kdu_int16 val;

            if (precision >= 8)
            { // Can essentially ignore the bit-depth.
                for (; width > 0; width--, sp++, dest+=gap)
                {
                    val = sp->ival;
                    val += (1<<(KDU_FIX_POINT-8))>>1;
                    val >>= (KDU_FIX_POINT-8);
                    val += 128;
                    if (val & ((-1)<<8))
                        val = (val<0)?0:255;
                    *dest = (kdu_byte) val;
                }
            }
            else
            { // Need to force zeros into one or more least significant bits.
                kdu_int16 downshift = (kdu_int16) (KDU_FIX_POINT-precision);
                kdu_int16 upshift = (kdu_int16) (8-precision);
                kdu_int16 offset = 1<<(downshift-1);

                for (; width > 0; width--, sp++, dest+=gap)
                {
                    val = sp->ival;
                    val = (val+offset)>>downshift;
                    val <<= upshift;
                    val += 128;
                    if (val & ((-1)<<8))
                        val = (val<0)?0:(256-(1<<upshift));
                    *dest = (kdu_byte) val;
                }
            }
        }
        else
        { // Transferring 16-bit absolute integers.
            kdu_int16 val;

            if (precision >= 8)
            {
                kdu_int16 downshift = (kdu_int16) (precision-8);
                kdu_int16 offset = (kdu_int16) ((1<<downshift)>>1);
              
                for (; width > 0; width--, sp++, dest+=gap)
                {
                    val = sp->ival;
                    val = (val+offset)>>downshift;
                    val += 128;
                    if (val & ((-1)<<8))
                        val = (val<0)?0:255;
                    *dest = (kdu_byte) val;
                }
            }
            else
            {
                kdu_int16 upshift = (kdu_int16) (8-precision);

                for (; width > 0; width--, sp++, dest+=gap)
                {
                    val = sp->ival;
                    val <<= upshift;
                    val += 128;
                    if (val & ((-1)<<8))
                        val = (val<0)?0:(256-(1<<upshift));
                    *dest = (kdu_byte) val;
                }
            }
        }
    }
    else if( eOutType == GDT_Int16 || eOutType == GDT_UInt16 )
    { // Source data is 16 bits.
        kdu_sample16 *sp = src.get_buf16();
        if (!src.is_absolute())
        { // Transferring 16-bit fixed point quantities
            kdu_int32 val;

            // Need to force zeros into one or more least significant bits.
            kdu_int16 downshift = (kdu_int16) (KDU_FIX_POINT-precision);
            kdu_int16 upshift = (kdu_int16) (16-precision);
            kdu_int16 offset = 1<<(downshift-1);
            
            for (; width > 0; width--, sp++, dest+=gap)
            {
                val = sp->ival;
                val = (val+offset)>>downshift;
                val <<= upshift;
                val += 32768;
                if (val < 0 || val > 65535 )
                    val = MAX(0,MIN(65535,val));
                *((GUInt16 *)dest) = (GUInt16)val;
            }
        }

        // not absolute 
        else if( eOutType == GDT_UInt16 ) // offset and clamp.
        { 
            kdu_int16 offset = 1 << (precision-1);

            for (; width > 0; width--, sp++, dest+=gap)
            {
                *((GUInt16 *)dest) = (GUInt16) MAX(0,MIN(65535,(sp->ival + offset)));
            }
        }
        else if( eOutType == GDT_Int16 ) // direct transfer
        { 
            for (; width > 0; width--, sp++, dest+=gap)
            {
                *((GInt16 *)dest) = (GInt16) sp->ival;
            }
        }
    }
}

/************************************************************************/
/*                           JP2KAKWriteBox()                           */
/*                                                                      */
/*      Write out the passed box and delete it.                         */
/************************************************************************/

static void JP2KAKWriteBox( jp2_target *jp2_out, GDALJP2Box *poBox )

{
    GUInt32 nBoxType;

    if( poBox == NULL )
        return;

    memcpy( &nBoxType, poBox->GetType(), 4 );
    
/* -------------------------------------------------------------------- */
/*      Write to a box on the JP2 file.                                 */
/* -------------------------------------------------------------------- */
    jp2_out->open_next( nBoxType );

    jp2_out->write( (kdu_byte *) poBox->GetWritableData(), 
                    poBox->GetDataLength() );

    jp2_out->close();

    delete poBox;
}

/************************************************************************/
/*                     JP2KAKCreateCopy_WriteTile()                     */
/************************************************************************/

static int 
JP2KAKCreateCopy_WriteTile( GDALDataset *poSrcDS, kdu_tile &oTile,
                            kdu_roi_image *poROIImage, 
                            int nXOff, int nYOff, int nXSize, int nYSize,
                            int bReversible, int nBits, GDALDataType eType,
                            kdu_codestream &oCodeStream, int bFlushEnabled,
                            kdu_long *layer_bytes, int layer_count,
                            GDALProgressFunc pfnProgress, void * pProgressData,
                            bool bComseg )

{                                       
/* -------------------------------------------------------------------- */
/*      Create one big tile, and a compressing engine, and line         */
/*      buffer for each component.                                      */
/* -------------------------------------------------------------------- */
    int c, num_components = oTile.get_num_components(); 
    kdu_push_ifc  *engines = new kdu_push_ifc[num_components];
    kdu_line_buf  *lines = new kdu_line_buf[num_components];
    kdu_sample_allocator allocator;
    for (c=0; c < num_components; c++)
    {
        kdu_resolution res = oTile.access_component(c).access_resolution(); 
        kdu_roi_node *roi_node = NULL;

        if( poROIImage != NULL )
        {
            kdu_dims  dims;
            
            res.get_dims(dims);
            roi_node = poROIImage->acquire_node(c,dims);
        }

        lines[c].pre_create(&allocator,nXSize,bReversible,bReversible);
        engines[c] = kdu_analysis(res,&allocator,bReversible,1.0F,roi_node);
    }

    try
    {
        allocator.finalize();

        for (c=0; c < num_components; c++)
            lines[c].create();
    }
    catch( ... )
    {
        CPLError( CE_Failure, CPLE_AppDefined, 
                  "allocate.finalize() failed, likely out of memory for compression information." );
        return FALSE;
    }
        
/* -------------------------------------------------------------------- */
/*      Write whole image.  Write 1024 lines of each component, then    */
/*      go back to the first, and do again.  This gives the rate        */
/*      computing machine all components to make good estimates.        */
/* -------------------------------------------------------------------- */
    int  iLine, iLinesWritten = 0;
#define CHUNK_SIZE  1024

    GByte *pabyBuffer = (GByte *) 
        CPLMalloc(nXSize * (GDALGetDataTypeSize(eType)/8) );

    CPLAssert( !oTile.get_ycc() );

    for( iLine = 0; iLine < nYSize; iLine += CHUNK_SIZE )
    {
        for (c=0; c < num_components; c++)
        {
            GDALRasterBand *poBand = poSrcDS->GetRasterBand( c+1 );
            int iSubline = 0;
        
            for( iSubline = iLine; 
                 iSubline < iLine+CHUNK_SIZE && iSubline < nYSize;
                 iSubline++ )
            {
                if( poBand->RasterIO( GF_Read, 
                                      nXOff, nYOff+iSubline, nXSize, 1, 
                                      (void *) pabyBuffer, nXSize, 1, eType,
                                      0, 0 ) == CE_Failure )
                    return FALSE;

                if( bReversible && eType == GDT_Byte )
                {
                    kdu_sample16 *dest = lines[c].get_buf16();
                    kdu_byte *sp = pabyBuffer;
                
                    for (int n=nXSize; n > 0; n--, dest++, sp++)
                        dest->ival = ((kdu_int16)(*sp)) - 128;
                }
                else if( bReversible && eType == GDT_Int16 )
                {
                    kdu_sample16 *dest = lines[c].get_buf16();
                    GInt16 *sp = (GInt16 *) pabyBuffer;
                
                    for (int n=nXSize; n > 0; n--, dest++, sp++)
                        dest->ival = *sp;
                }
                else if( bReversible && eType == GDT_UInt16 )
                {
                    kdu_sample16 *dest = lines[c].get_buf16();
                    GUInt16 *sp = (GUInt16 *) pabyBuffer;
                
                    for (int n=nXSize; n > 0; n--, dest++, sp++)
                        dest->ival = *sp;
                }
                else if( eType == GDT_Byte )
                {
                    kdu_sample32 *dest = lines[c].get_buf32();
                    kdu_byte *sp = pabyBuffer;
                    int nOffset = 1 << (nBits-1);
                    float fScale = 1.0 / (1 << nBits);
                
                    for (int n=nXSize; n > 0; n--, dest++, sp++)
                        dest->fval = (float) 
                            ((((kdu_int16)(*sp))-nOffset) * fScale);
                }
                else if( eType == GDT_Int16 )
                {
                    kdu_sample32 *dest = lines[c].get_buf32();
                    GInt16  *sp = (GInt16 *) pabyBuffer;
                    float fScale = 1.0 / (1 << nBits);
                
                    for (int n=nXSize; n > 0; n--, dest++, sp++)
                        dest->fval = (float) 
                            (((kdu_int16)(*sp)) * fScale);
                }
                else if( eType == GDT_UInt16 )
                {
                    kdu_sample32 *dest = lines[c].get_buf32();
                    GUInt16  *sp = (GUInt16 *) pabyBuffer;
                    int nOffset = 1 << (nBits-1);
                    float fScale = 1.0 / (1 << nBits);
                
                    for (int n=nXSize; n > 0; n--, dest++, sp++)
                        dest->fval = (float) 
                            (((int)(*sp) - nOffset) * fScale);
                }
                else if( eType == GDT_Float32 )
                {
                    kdu_sample32 *dest = lines[c].get_buf32();
                    float  *sp = (float *) pabyBuffer;
                
                    for (int n=nXSize; n > 0; n--, dest++, sp++)
                        dest->fval = *sp;  /* scale it? */
                }

                engines[c].push(lines[c],true);

                iLinesWritten++;

                if( !pfnProgress( iLinesWritten 
                                  / (double) (num_components * nYSize),
                                  NULL, pProgressData ) )
                {
                    return FALSE;
                }
            }
        }

        if( oCodeStream.ready_for_flush() && bFlushEnabled )
        {
            CPLDebug( "JP2KAK", 
                      "Calling oCodeStream.flush() at line %d",
                      MIN(nYSize,iLine+CHUNK_SIZE) );
            
            oCodeStream.flush( layer_bytes, layer_count, NULL,
                               true, bComseg );
        }
        else if( bFlushEnabled )
            CPLDebug( "JP2KAK", 
                      "read_for_flush() is false at line %d.",
                      iLine );
    }

/* -------------------------------------------------------------------- */
/*      Cleanup resources.                                              */
/* -------------------------------------------------------------------- */
    for( c = 0; c < num_components; c++ )
        engines[c].destroy();

    delete[] engines;
    delete[] lines;

    CPLFree( pabyBuffer );

    if( poROIImage != NULL )
        delete poROIImage;

    return TRUE;
}

/************************************************************************/
/*                             CreateCopy()                             */
/************************************************************************/

static GDALDataset *
JP2KAKCreateCopy( const char * pszFilename, GDALDataset *poSrcDS, 
                  int bStrict, char ** papszOptions, 
                  GDALProgressFunc pfnProgress, void * pProgressData )

{
    int	   nXSize = poSrcDS->GetRasterXSize();
    int    nYSize = poSrcDS->GetRasterYSize();
    int    nTileXSize = nXSize;
    int    nTileYSize = nYSize;
    bool   bReversible = false;
    int    bFlushEnabled = CSLFetchBoolean( papszOptions, "FLUSH", TRUE );
    int    nBits;

    if( poSrcDS->GetRasterCount() == 0 )
    {
        CPLError( CE_Failure, CPLE_AppDefined,
                  "Creating zero band files not supported by JP2KAK driver." );
        return NULL;
    }

/* -------------------------------------------------------------------- */
/*      Initialize Kakadu warning/error reporting subsystem.            */
/* -------------------------------------------------------------------- */
    if( !kakadu_initialized )
    {
        kakadu_initialized = TRUE;

        kdu_cpl_error_message oErrHandler( CE_Failure );
        kdu_cpl_error_message oWarningHandler( CE_Warning );
        
        kdu_customize_warnings(new kdu_cpl_error_message( CE_Warning ) );
        kdu_customize_errors(new kdu_cpl_error_message( CE_Failure ) );
    }

/* -------------------------------------------------------------------- */
/*      What data type should we use?  We assume all datatypes match    */
/*      the first band.                                                 */
/* -------------------------------------------------------------------- */
    GDALDataType eType;
    GDALRasterBand *poPrototypeBand = poSrcDS->GetRasterBand(1);

    eType = poPrototypeBand->GetRasterDataType();
    if( eType != GDT_Byte && eType != GDT_Int16 && eType != GDT_UInt16
        && eType != GDT_Float32 )
    {
        if( bStrict )
        {
            CPLError(CE_Failure, CPLE_AppDefined, 
                     "JP2KAK (JPEG2000) driver does not support data type %s.",
                     GDALGetDataTypeName( eType ) );
            return NULL;
        }

        CPLError(CE_Warning, CPLE_AppDefined, 
                 "JP2KAK (JPEG2000) driver does not support data type %s, forcing to Float32.",
                 GDALGetDataTypeName( eType ) );
        
        eType = GDT_Float32;
    }

/* -------------------------------------------------------------------- */
/*      Do we want to write a pseudo-colored image?                     */
/* -------------------------------------------------------------------- */
    int bHaveCT = poPrototypeBand->GetColorTable() != NULL
        && poSrcDS->GetRasterCount() == 1;

/* -------------------------------------------------------------------- */
/*      How many layers?                                                */
/* -------------------------------------------------------------------- */
    int      layer_count = 12;

    if( CSLFetchNameValue(papszOptions,"LAYERS") != NULL )
        layer_count = atoi(CSLFetchNameValue(papszOptions,"LAYERS"));
    else if( CSLFetchNameValue(papszOptions,"Clayers") != NULL )
        layer_count = atoi(CSLFetchNameValue(papszOptions,"Clayers"));
    
/* -------------------------------------------------------------------- */
/*	Establish how many bytes of data we want for each layer.  	*/
/*	We take the quality as a percentage, so if QUALITY of 50 is	*/
/*	selected, we will set the base layer to 50% the default size.   */
/*	We let the other layers be computed internally.                 */
/* -------------------------------------------------------------------- */
    kdu_long *layer_bytes;
    double   dfQuality = 20.0;

    layer_bytes = (kdu_long *) CPLCalloc(sizeof(kdu_long),layer_count);

    if( CSLFetchNameValue(papszOptions,"QUALITY") != NULL )
    {
        dfQuality = atof(CSLFetchNameValue(papszOptions,"QUALITY"));
    }

    if( dfQuality < 1.0 || dfQuality > 100.0 )
    {
        CPLError( CE_Failure, CPLE_IllegalArg,
                  "QUALITY=%s is not a legal value in the range 1-100.",
                  CSLFetchNameValue(papszOptions,"QUALITY") );
        return NULL;
    }

    if( dfQuality < 99.5 )
    {
        double dfLayerBytes = 
            (nXSize * ((double) nYSize) * dfQuality / 100.0);

        dfLayerBytes *= (GDALGetDataTypeSize(eType) / 8);
        dfLayerBytes *= GDALGetRasterCount(poSrcDS);

        if( dfLayerBytes > 2000000000.0 && sizeof(kdu_long) == 4 )
        {
            CPLError( CE_Warning, CPLE_AppDefined, 
                      "Trimmming maximum size of file 2GB from %.1fGB\n"
                      "to avoid overflow of kdu_long layer size.",
                      dfLayerBytes / 1000000000.0 );
            dfLayerBytes = 2000000000.0;
        }

        layer_bytes[layer_count-1] = (kdu_long) dfLayerBytes;

        CPLDebug( "JP2KAK", "layer_bytes[] = %g\n", 
                  (double) layer_bytes[layer_count-1] );
    }
    else
        bReversible = true;

/* -------------------------------------------------------------------- */
/*      Do we want to use more than one tile?                           */
/* -------------------------------------------------------------------- */
    if( nTileXSize > 25000 )
    {
        // Don't generate tiles that are terrible wide by default, as
        // they consume alot of memory for the compression engine.
        nTileXSize = 20000;
    }

    if( CSLFetchNameValue( papszOptions, "BLOCKXSIZE" ) != NULL )
        nTileXSize = atoi(CSLFetchNameValue( papszOptions, "BLOCKXSIZE"));

    if( CSLFetchNameValue( papszOptions, "BLOCKYSIZE" ) != NULL )
        nTileYSize = atoi(CSLFetchNameValue( papszOptions, "BLOCKYSIZE"));

/* -------------------------------------------------------------------- */
/*      Avoid splitting into too many tiles - apparently limiting to    */
/*      64K tiles.  There is a hard limit on the number of tiles        */
/*      allowed in JPEG2000.                                            */
/* -------------------------------------------------------------------- */
    while( (double)nXSize*(double)nYSize
           / (double)nTileXSize / (double)nTileYSize / 1024.0 >= 64.0 )
    {
        nTileXSize *= 2;
        nTileYSize *= 2;
    }

    if( nTileXSize > nXSize ) nTileXSize = nXSize;
    if( nTileYSize > nYSize ) nTileYSize = nYSize;
      
/* -------------------------------------------------------------------- */
/*      Do we want a comment segment emitted?                           */
/* -------------------------------------------------------------------- */
    bool bComseg;

    bComseg = CSLFetchBoolean( papszOptions, "COMSEG", TRUE );

/* -------------------------------------------------------------------- */
/*      Work out the precision.                                         */
/* -------------------------------------------------------------------- */
    if( CSLFetchNameValue( papszOptions, "NBITS" ) != NULL )
        nBits = atoi(CSLFetchNameValue(papszOptions,"NBITS"));
    else if( poPrototypeBand->GetMetadataItem( "NBITS", "IMAGE_STRUCTURE" ) 
             != NULL )
        nBits = atoi(poPrototypeBand->GetMetadataItem( "NBITS", 
                                                       "IMAGE_STRUCTURE" ));
    else
        nBits = GDALGetDataTypeSize(eType);

/* -------------------------------------------------------------------- */
/*      Establish the general image parameters.                         */
/* -------------------------------------------------------------------- */
    siz_params  oSizeParams;

    oSizeParams.set( Scomponents, 0, 0, poSrcDS->GetRasterCount() );
    oSizeParams.set( Sdims, 0, 0, nYSize );
    oSizeParams.set( Sdims, 0, 1, nXSize );
    oSizeParams.set( Sprecision, 0, 0, nBits );
    if( eType == GDT_UInt16 || eType == GDT_Byte )
        oSizeParams.set( Ssigned, 0, 0, false );
    else
        oSizeParams.set( Ssigned, 0, 0, true );

    if( nTileXSize != nXSize || nTileYSize != nYSize )
    {
        oSizeParams.set( Stiles, 0, 0, nTileYSize );
        oSizeParams.set( Stiles, 0, 1, nTileXSize );
        
        CPLDebug( "JP2KAK", "Stiles=%d,%d", nTileYSize, nTileXSize );
    }

    kdu_params *poSizeRef = &oSizeParams; poSizeRef->finalize();

/* -------------------------------------------------------------------- */
/*      Open output file, and setup codestream.                         */
/* -------------------------------------------------------------------- */
    jp2_family_tgt         family;
#ifdef KAKADU_JPX
    jpx_family_tgt         jpx_family;
    jpx_target             jpx_out;
    int			   bIsJPX = !EQUAL(CPLGetExtension(pszFilename),"jpf");
#else
    int                    bIsJPX = FALSE;
#endif

    kdu_compressed_target *poOutputFile = NULL;
    jp2_target             jp2_out;
    int                    bIsJP2 = !EQUAL(CPLGetExtension(pszFilename),"jpc")
        && !bIsJPX;
    kdu_codestream         oCodeStream;

    vsil_target            oVSILTarget;

    if( !pfnProgress( 0.0, NULL, pProgressData ) )
        return NULL;

    try
    {
        oVSILTarget.open( pszFilename, "w" );

        if( bIsJP2 )
        {
            //family.open( pszFilename );
            family.open( &oVSILTarget );

            jp2_out.open( &family );
            poOutputFile = &jp2_out;
        }
#ifdef KAKADU_JPX
        else if( bIsJPX )
        {
            jpx_family.open( pszFilename );

            jpx_out.open( &jpx_family );
            jpx_out.add_codestream();
        }
#endif
        else
            poOutputFile = &oVSILTarget;

        oCodeStream.create(&oSizeParams, poOutputFile );
    }
    catch( ... )
    {
        return NULL;
    }

/* -------------------------------------------------------------------- */
/*      Do we have a high res region of interest?                       */
/* -------------------------------------------------------------------- */
    kdu_roi_image  *poROIImage = NULL;
    char **papszROIDefs = CSLFetchNameValueMultiple( papszOptions, "ROI" );
    int iROI;
    
    for( iROI = 0; papszROIDefs != NULL && papszROIDefs[iROI] != NULL; iROI++ )
    {
        kdu_dims region;
        char **papszTokens = CSLTokenizeStringComplex( papszROIDefs[iROI], ",",
                                                       FALSE, FALSE );

        if( CSLCount(papszTokens) != 4 )
        {
            CPLError( CE_Warning, CPLE_AppDefined,
                      "Skipping corrupt ROI def = \n%s", 
                      papszROIDefs[iROI] );
            continue;
        }

        region.pos.x = atoi(papszTokens[0]);
        region.pos.y = atoi(papszTokens[1]);
        region.size.x = atoi(papszTokens[2]);
        region.size.y = atoi(papszTokens[3]);

        CSLDestroy( papszTokens );

        poROIImage = new kdu_roi_rect(oCodeStream,region);
    }

/* -------------------------------------------------------------------- */
/*      Set some particular parameters.                                 */
/* -------------------------------------------------------------------- */
    oCodeStream.access_siz()->parse_string(
        CPLString().Printf("Clayers=%d",layer_count).c_str());
    oCodeStream.access_siz()->parse_string("Cycc=no");
    if( eType == GDT_Int16 || eType == GDT_UInt16 )
        oCodeStream.access_siz()->parse_string("Qstep=0.0000152588");
        
    if( bReversible )
        oCodeStream.access_siz()->parse_string("Creversible=yes");
    else
        oCodeStream.access_siz()->parse_string("Creversible=no");

/* -------------------------------------------------------------------- */
/*      Set some user-overridable parameters.                           */
/* -------------------------------------------------------------------- */
    int iParm;
    char *apszParms[] = { "Corder", "PCRL", 
                          "Cprecincts", "{512,512},{256,512},{128,512},{64,512},{32,512},{16,512},{8,512},{4,512},{2,512}",
                          "ORGgen_plt", "yes", 
                          "ORGgen_tlm", NULL,
                          "Qguard", NULL, 
                          "Cmodes", NULL, 
                          "Clevels", NULL,
                          "Cblk", NULL,
                          "Rshift", NULL,
                          "Rlevels", NULL,
                          "Rweight", NULL,
                          "Sprofile", NULL,
                          NULL, NULL };

    for( iParm = 0; apszParms[iParm] != NULL; iParm += 2 )
    {
        const char *pszValue = 
            CSLFetchNameValue( papszOptions, apszParms[iParm] );
        
        if( pszValue == NULL )
            pszValue = apszParms[iParm+1];

        if( pszValue != NULL )
        {
            CPLString osOpt;

            osOpt.Printf( "%s=%s", apszParms[iParm], pszValue );
            oCodeStream.access_siz()->parse_string( osOpt );

            CPLDebug( "JP2KAK", "parse_string(%s)", osOpt.c_str() );
        }
    }

    oCodeStream.access_siz()->finalize_all();

/* -------------------------------------------------------------------- */
/*      Some JP2 specific parameters.                                   */
/* -------------------------------------------------------------------- */
    if( bIsJP2 )
    {
        // Set dimensional information (all redundant with the SIZ marker segment)
        jp2_dimensions dims = jp2_out.access_dimensions();
        dims.init(&oSizeParams);
        
        // Set colour space information (mandatory)
        jp2_colour colour = jp2_out.access_colour();

        if( bHaveCT || poSrcDS->GetRasterCount() == 3 )
            colour.init( JP2_sRGB_SPACE );
        else if( poSrcDS->GetRasterCount() >= 4 
                 && poSrcDS->GetRasterBand(4)->GetColorInterpretation() 
                 == GCI_AlphaBand )
        {
            colour.init( JP2_sRGB_SPACE );
            jp2_out.access_channels().init( 3 );
            jp2_out.access_channels().set_colour_mapping(0,0);
            jp2_out.access_channels().set_colour_mapping(1,1);
            jp2_out.access_channels().set_colour_mapping(2,2);
            jp2_out.access_channels().set_opacity_mapping(0,3);
            jp2_out.access_channels().set_opacity_mapping(1,3);
            jp2_out.access_channels().set_opacity_mapping(2,3);
        }
        else if( poSrcDS->GetRasterCount() >= 2
                 && poSrcDS->GetRasterBand(2)->GetColorInterpretation() 
                 == GCI_AlphaBand )
        {
            colour.init( JP2_sLUM_SPACE );
            jp2_out.access_channels().init( 1 );
            jp2_out.access_channels().set_colour_mapping(0,0);
            jp2_out.access_channels().set_opacity_mapping(0,1);
        }
        else
            colour.init( JP2_sLUM_SPACE );
    }

/* -------------------------------------------------------------------- */
/*      Write JP2 pseudocolor table if available.                       */
/* -------------------------------------------------------------------- */
    if( bIsJP2 && bHaveCT )
    {
        jp2_palette oJP2Palette;
        GDALColorTable *poCT = poPrototypeBand->GetColorTable();
        int  iColor, nCount = poCT->GetColorEntryCount();
        kdu_int32 *panLUT = (kdu_int32 *) 
            CPLMalloc(sizeof(kdu_int32) * nCount * 3);
        
        oJP2Palette = jp2_out.access_palette();
        oJP2Palette.init( 3, nCount );

        for( iColor = 0; iColor < nCount; iColor++ )
        {
            GDALColorEntry sEntry;

            poCT->GetColorEntryAsRGB( iColor, &sEntry );
            panLUT[iColor + nCount * 0] = sEntry.c1;
            panLUT[iColor + nCount * 1] = sEntry.c2;
            panLUT[iColor + nCount * 2] = sEntry.c3;
        }

        oJP2Palette.set_lut( 0, panLUT + nCount * 0, 8, false );
        oJP2Palette.set_lut( 1, panLUT + nCount * 1, 8, false );
        oJP2Palette.set_lut( 2, panLUT + nCount * 2, 8, false );

        CPLFree( panLUT );

        jp2_channels oJP2Channels = jp2_out.access_channels();

        oJP2Channels.init( 3 );
        oJP2Channels.set_colour_mapping( 0, 0, 0 );
        oJP2Channels.set_colour_mapping( 1, 0, 1 );
        oJP2Channels.set_colour_mapping( 2, 0, 2 );
    }

    if( bIsJP2 )
    {
        jp2_out.write_header();
    }

/* -------------------------------------------------------------------- */
/*      Set the GeoTIFF and GML boxes if georeferencing is available,   */
/*      and this is a JP2 file.                                         */
/* -------------------------------------------------------------------- */
    double	adfGeoTransform[6];
    if( bIsJP2
        && ((poSrcDS->GetGeoTransform(adfGeoTransform) == CE_None
             && (adfGeoTransform[0] != 0.0 
                 || adfGeoTransform[1] != 1.0 
                 || adfGeoTransform[2] != 0.0 
                 || adfGeoTransform[3] != 0.0 
                 || adfGeoTransform[4] != 0.0 
                 || ABS(adfGeoTransform[5]) != 1.0))
            || poSrcDS->GetGCPCount() > 0) )
    {
        GDALJP2Metadata oJP2MD;

        if( poSrcDS->GetGCPCount() > 0 )
        {
            oJP2MD.SetProjection( poSrcDS->GetGCPProjection() );
            oJP2MD.SetGCPs( poSrcDS->GetGCPCount(), poSrcDS->GetGCPs() );
        }
        else
        {
            oJP2MD.SetProjection( poSrcDS->GetProjectionRef() );
            oJP2MD.SetGeoTransform( adfGeoTransform );
        }

        
        if( CSLFetchBoolean( papszOptions, "GMLJP2", TRUE ) )
            JP2KAKWriteBox( &jp2_out, oJP2MD.CreateGMLJP2(nXSize,nYSize) );
        if( CSLFetchBoolean( papszOptions, "GeoJP2", TRUE ) )
            JP2KAKWriteBox( &jp2_out, oJP2MD.CreateJP2GeoTIFF() );
    }

/* -------------------------------------------------------------------- */
/*      Do we have any XML boxes we want to preserve?                   */
/* -------------------------------------------------------------------- */
    int iBox;
    
    for( iBox = 0; TRUE; iBox++ )
    {
        CPLString oName;
        char **papszMD;

        oName.Printf( "xml:BOX_%d", iBox );
        papszMD = poSrcDS->GetMetadata( oName );
        
        if( papszMD == NULL || CSLCount(papszMD) != 1 )
            break;

        GDALJP2Box *poXMLBox = new GDALJP2Box();

        poXMLBox->SetType( "xml " );
        poXMLBox->SetWritableData( strlen(papszMD[0])+1, 
                                   (GByte *) papszMD[0] );
        JP2KAKWriteBox( &jp2_out, poXMLBox );
    }

/* -------------------------------------------------------------------- */
/*      Open codestream box.                                            */
/* -------------------------------------------------------------------- */
    if( bIsJP2 )
        jp2_out.open_codestream();

/* -------------------------------------------------------------------- */
/*      Create one big tile, and a compressing engine, and line         */
/*      buffer for each component.                                      */
/* -------------------------------------------------------------------- */
    int iTileXOff, iTileYOff;
    double dfPixelsDone = 0.0;
    double dfPixelsTotal = nXSize * (double) nYSize;
    
    for( iTileYOff = 0; iTileYOff < nYSize; iTileYOff += nTileYSize )
    {
        for( iTileXOff = 0; iTileXOff < nXSize; iTileXOff += nTileXSize )
        {
            kdu_tile oTile = oCodeStream.open_tile(
                kdu_coords(iTileXOff/nTileXSize,iTileYOff/nTileYSize));
            int nThisTileXSize, nThisTileYSize;

            // ---------------------------------------------------------------
            // Is this a partial tile on the right or bottom?
            if( iTileXOff + nTileXSize < nXSize )
                nThisTileXSize = nTileXSize;
            else
                nThisTileXSize = nXSize - iTileXOff;
    
            if( iTileYOff + nTileYSize < nYSize )
                nThisTileYSize = nTileYSize;
            else
                nThisTileYSize = nYSize - iTileYOff;

            // ---------------------------------------------------------------
            // Setup scaled progress monitor

            void *pScaledProgressData;
            double dfPixelsDoneAfter = 
                dfPixelsDone + (nThisTileXSize * (double) nThisTileYSize);

            pScaledProgressData = 
                GDALCreateScaledProgress( dfPixelsDone / dfPixelsTotal,
                                          dfPixelsDoneAfter / dfPixelsTotal,
                                          pfnProgress, pProgressData );
            if( !JP2KAKCreateCopy_WriteTile( poSrcDS, oTile, poROIImage, 
                                             iTileXOff, iTileYOff, 
                                             nThisTileXSize, nThisTileYSize, 
                                             bReversible, nBits, eType, 
                                             oCodeStream, bFlushEnabled,
                                             layer_bytes, layer_count,
                                             GDALScaledProgress, 
                                             pScaledProgressData, bComseg ) )
            {
                GDALDestroyScaledProgress( pScaledProgressData );

                oCodeStream.destroy();
                poOutputFile->close();
                VSIUnlink( pszFilename );
                return NULL;
            }

            GDALDestroyScaledProgress( pScaledProgressData );
            dfPixelsDone = dfPixelsDoneAfter;

            oTile.close();
        }
    }
    
/* -------------------------------------------------------------------- */
/*      Finish flushing out results.                                    */
/* -------------------------------------------------------------------- */
    oCodeStream.flush(layer_bytes, layer_count, NULL, true, bComseg );
    oCodeStream.destroy();

    CPLFree( layer_bytes );

    if( bIsJP2 )
    {
        jp2_out.close();
        family.close();
    }
    else
    {
        poOutputFile->close();
    }

    oVSILTarget.close();

    if( !pfnProgress( 1.0, NULL, pProgressData ) )
        return NULL;

/* -------------------------------------------------------------------- */
/*      Re-open dataset, and copy any auxilary pam information.         */
/* -------------------------------------------------------------------- */
    GDALOpenInfo oOpenInfo(pszFilename, GA_ReadOnly);
    GDALPamDataset *poDS = (GDALPamDataset*) JP2KAKDataset::Open(&oOpenInfo);

    if( poDS )
        poDS->CloneInfo( poSrcDS, GCIF_PAM_DEFAULT );

    return poDS;
}

/************************************************************************/
/*                        GDALRegister_JP2KAK()				*/
/************************************************************************/

void GDALRegister_JP2KAK()

{
    GDALDriver	*poDriver;
    
    if (! GDAL_CHECK_VERSION("JP2KAK driver"))
        return;

    if( GDALGetDriverByName( "JP2KAK" ) == NULL )
    {
        poDriver = new GDALDriver();
        
        poDriver->SetDescription( "JP2KAK" );
        poDriver->SetMetadataItem( GDAL_DMD_LONGNAME, 
                                   "JPEG-2000 (based on Kakadu)" );
        poDriver->SetMetadataItem( GDAL_DMD_HELPTOPIC, 
                                   "frmt_jp2kak.html" );
        poDriver->SetMetadataItem( GDAL_DMD_CREATIONDATATYPES, 
                                   "Byte Int16 UInt16" );
        poDriver->SetMetadataItem( GDAL_DMD_MIMETYPE, "image/jp2" );
        poDriver->SetMetadataItem( GDAL_DMD_EXTENSION, "jp2" );

        poDriver->SetMetadataItem( GDAL_DCAP_VIRTUALIO, "YES" );

        poDriver->SetMetadataItem( GDAL_DMD_CREATIONOPTIONLIST, 
"<CreationOptionList>"
"   <Option name='QUALITY' type='integer' description='1-100, 100 is lossless'/>"
"   <Option name='BLOCKXSIZE' type='int' description='Tile Width'/>"
"   <Option name='BLOCKYSIZE' type='int' description='Tile Height'/>"
"   <Option name='GeoJP2' type='boolean' description='defaults to ON'/>"
"   <Option name='GMLJP2' type='boolean' description='defaults to ON'/>"
"   <Option name='LAYERS' type='integer'/>"
"   <Option name='ROI' type='string'/>"
"   <Option name='COMSEG' type='boolean' />"
"   <Option name='NBITS' type='int' description='BITS (precision) for sub-byte files (1-7), sub-uint16 (9-15)'/>"
"   <Option name='Corder' type='string'/>"
"   <Option name='Cprecincts' type='string'/>"
"   <Option name='Cmodes' type='string'/>"
"   <Option name='Clevels' type='string'/>"
"   <Option name='ORGgen_plt' type='string'/>"
"   <Option name='ORGgen_tlm' type='string'/>"
"   <Option name='Qguard' type='integer'/>"
"   <Option name='Sprofile' type='integer'/>"
"   <Option name='Rshift' type='string'/>"
"   <Option name='Rlevels' type='string'/>"
"   <Option name='Rweight' type='string'/>"
"</CreationOptionList>" );

        poDriver->pfnOpen = JP2KAKDataset::Open;
        poDriver->pfnIdentify = JP2KAKDataset::Identify;
        poDriver->pfnCreateCopy = JP2KAKCreateCopy;

        GetGDALDriverManager()->RegisterDriver( poDriver );
    }
}
