/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include "h5repack.h"
#include "h5tools.h"
#include "h5tools_utils.h"

/* number of members in an array */
#ifndef NELMTS
#    define NELMTS(X)    (sizeof(X)/sizeof(X[0]))
#endif

/* minimum of two values */
#undef MIN
#define MIN(a,b)    (((a)<(b)) ? (a) : (b))

/*-------------------------------------------------------------------------
 * Function: aux_find_obj
 *
 * Purpose: find the object name NAME (got from the traverse list)
 *  in the repack options list
 *
 *-------------------------------------------------------------------------
 */
static int
aux_find_obj(const char* name,          /* object name from traverse list */
                 pack_opt_t *options,       /* repack options */
                 pack_info_t *obj /*OUT*/)  /* info about object to filter */
{
 char *pdest;
 int  result;
 unsigned int  i;

 for ( i=0; i<options->op_tbl->nelems; i++)
 {
     if (HDstrcmp(options->op_tbl->objs[i].path,name)==0)
     {
         *obj =  options->op_tbl->objs[i];
         return (int)i;
     }

     pdest  = HDstrstr(name,options->op_tbl->objs[i].path);
     result = (int)(pdest - name);

     /* found at position 1, meaning without '/' */
     if( pdest != NULL && result==1 )
     {
         *obj =  options->op_tbl->objs[i];
         return (int)i;
     }
 }/*i*/

 return -1;
}


/*-------------------------------------------------------------------------
 * Function: aux_assign_obj
 *
 * Purpose: find the object name NAME (got from the traverse list)
 *  in the repack options list; assign the filter information OBJ
 *
 * Return: 0 not found, 1 found
 *
 *-------------------------------------------------------------------------
 */
static int
aux_assign_obj(const char* name,            /* object name from traverse list */
                   pack_opt_t *options,         /* repack options */
                   pack_info_t *obj /*OUT*/)    /* info about object to filter */
{

    int  idx, i;
    pack_info_t tmp;

    init_packobject(&tmp);

    idx = aux_find_obj(name,options,&tmp);

    /* name was on input */
    if (idx>=0)
    {


        /* applying to all objects */
        if (options->all_layout)
        {
            /* assign the global layout info to the OBJ info */
            tmp.layout=options->layout_g;
            switch (options->layout_g)
            {
            case H5D_CHUNKED:
                tmp.chunk.rank=options->chunk_g.rank;
                for ( i=0; i<tmp.chunk.rank; i++)
                    tmp.chunk.chunk_lengths[i]=options->chunk_g.chunk_lengths[i];
                break;
            case H5D_LAYOUT_ERROR:
            case H5D_COMPACT:
            case H5D_CONTIGUOUS:
            case H5D_NLAYOUTS:
                break;
            default:
                break;
            }/*switch*/
        }
        else
        {
            tmp.layout = options->op_tbl->objs[idx].layout;
            switch (tmp.layout)
            {
            case H5D_CHUNKED:
                tmp.chunk.rank = options->op_tbl->objs[idx].chunk.rank;
                for ( i=0; i<tmp.chunk.rank; i++)
                    tmp.chunk.chunk_lengths[i]=options->op_tbl->objs[idx].chunk.chunk_lengths[i];
                break;
            case H5D_LAYOUT_ERROR:
            case H5D_COMPACT:
            case H5D_CONTIGUOUS:
            case H5D_NLAYOUTS:
                break;
            default:
                break;
            }/*switch*/

        }

        /* applying to all objects */
        if (options->all_filter)
        {
            /* assign the global filter */
            tmp.nfilters=1;
            tmp.filter[0]=options->filter_g[0];
        } /* if all */
        else
        {
            tmp.nfilters=options->op_tbl->objs[idx].nfilters;
            for ( i=0; i<tmp.nfilters; i++)
            {
                tmp.filter[i] = options->op_tbl->objs[idx].filter[i];
            }
        }


    } /* if idx */


    /* no input name */

    else
    {

        if (options->all_filter)
        {
            int k;

            /* assign the global filters */
            tmp.nfilters=options->n_filter_g;
            for ( k = 0; k < options->n_filter_g; k++)
                tmp.filter[k]=options->filter_g[k];
        }
        if (options->all_layout)
        {
            /* assign the global layout info to the OBJ info */
            tmp.layout=options->layout_g;
            switch (options->layout_g)
            {
            case H5D_CHUNKED:
                tmp.chunk.rank=options->chunk_g.rank;
                for ( i=0; i<tmp.chunk.rank; i++)
                    tmp.chunk.chunk_lengths[i]=options->chunk_g.chunk_lengths[i];
                break;
            case H5D_LAYOUT_ERROR:
            case H5D_COMPACT:
            case H5D_CONTIGUOUS:
            case H5D_NLAYOUTS:
                break;
            default:
                break;
            }/*switch*/
        }
    }

    *obj = tmp;
    return 1;

}


/*-------------------------------------------------------------------------
 * Function: apply_filters
 *
 * Purpose: apply the filters in the object to the property list;
 *  do extra checking in the case of SZIP; delete all filters in the case
 *  of H5Z_FILTER_NONE present in the PACK_INFO_T filter array
 *
 * Return: 0 success, -1 an error occured
 *
 * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
 *
 * Date: December 19, 2003
 *
 *-------------------------------------------------------------------------
 */

int apply_filters(const char* name,    /* object name from traverse list */
                  int rank,            /* rank of dataset */
                  hsize_t *dims,       /* dimensions of dataset */
                  size_t msize,        /* size of type */
                  hid_t dcpl_id,       /* dataset creation property list */
                  pack_opt_t *options, /* repack options */
                  int *has_filter)     /* (OUT) object NAME has a filter */


{
    int          nfilters;       /* number of filters in DCPL */
    hsize_t      chsize[64];     /* chunk size in elements */
    H5D_layout_t layout;
    int          i;
    pack_info_t  obj;

    *has_filter = 0;

    if (rank==0) /* scalar dataset, do not apply */
        return 0;

   /*-------------------------------------------------------------------------
    * initialize the assigment object
    *-------------------------------------------------------------------------
    */
    init_packobject(&obj);

   /*-------------------------------------------------------------------------
    * find options
    *-------------------------------------------------------------------------
    */
    if (aux_assign_obj(name,options,&obj)==0)
        return 0;

    /* get information about input filters */
    if ((nfilters = H5Pget_nfilters(dcpl_id))<0)
        return -1;

   /*-------------------------------------------------------------------------
    * check if we have filters in the pipeline
    * we want to replace them with the input filters
    * only remove if we are inserting new ones
    *-------------------------------------------------------------------------
    */
    if (nfilters && obj.nfilters )
    {
        *has_filter = 1;
        if (H5Premove_filter(dcpl_id,H5Z_FILTER_ALL)<0)
            return -1;
    }

   /*-------------------------------------------------------------------------
    * check if there is an existent chunk
    * read it only if there is not a requested layout
    *-------------------------------------------------------------------------
    */
    if (obj.layout == -1 )
    {
        if ((layout = H5Pget_layout(dcpl_id))<0)
            return -1;

        if (layout == H5D_CHUNKED)
        {
            if ((rank = H5Pget_chunk(dcpl_id,NELMTS(chsize),chsize/*out*/))<0)
                return -1;
            obj.layout = H5D_CHUNKED;
            obj.chunk.rank = rank;
            for ( i = 0; i < rank; i++)
                obj.chunk.chunk_lengths[i] = chsize[i];
        }
    }

    /*-------------------------------------------------------------------------
    * the type of filter and additional parameter
    * type can be one of the filters
    * H5Z_FILTER_NONE        0 , uncompress if compressed
    * H5Z_FILTER_DEFLATE     1 , deflation like gzip
    * H5Z_FILTER_SHUFFLE     2 , shuffle the data
    * H5Z_FILTER_FLETCHER32  3 , fletcher32 checksum of EDC
    * H5Z_FILTER_SZIP        4 , szip compression
    * H5Z_FILTER_NBIT        5 , nbit compression
    * H5Z_FILTER_SCALEOFFSET 6 , scaleoffset compression
    *-------------------------------------------------------------------------
    */

    if (obj.nfilters)
    {

   /*-------------------------------------------------------------------------
    * filters require CHUNK layout; if we do not have one define a default
    *-------------------------------------------------------------------------
    */
        if (obj.layout==-1)
        {

            /* stripmine info */
            hsize_t sm_size[H5S_MAX_RANK]; /*stripmine size */
            hsize_t sm_nbytes;             /*bytes per stripmine */

            obj.chunk.rank = rank;

            /*
            * determine the strip mine size. The strip mine is
            * a hyperslab whose size is manageable.
            */



            sm_nbytes = msize;
            for ( i = rank; i > 0; --i)
            {
                hsize_t size = H5TOOLS_BUFSIZE / sm_nbytes;
                if ( size == 0) /* datum size > H5TOOLS_BUFSIZE */
                    size = 1;
                sm_size[i - 1] = MIN(dims[i - 1], size);
                sm_nbytes *= sm_size[i - 1];
                HDassert(sm_nbytes > 0);

            }

            for ( i = 0; i < rank; i++)
            {
                obj.chunk.chunk_lengths[i] = sm_size[i];
            }

        }

        for ( i=0; i<obj.nfilters; i++)
        {
            switch (obj.filter[i].filtn)
            {

            /*-------------------------------------------------------------------------
             * H5Z_FILTER_NONE       0 , uncompress if compressed
             *-------------------------------------------------------------------------
             */
            case H5Z_FILTER_NONE:
            	break;

           /*-------------------------------------------------------------------------
            * H5Z_FILTER_DEFLATE       1 , deflation like gzip
            *-------------------------------------------------------------------------
            */
            case H5Z_FILTER_DEFLATE:
                {
                    unsigned     aggression;     /* the deflate level */

                    aggression = obj.filter[i].cd_values[0];
                    /* set up for deflated data */
                    if(H5Pset_chunk(dcpl_id, obj.chunk.rank, obj.chunk.chunk_lengths)<0)
                        return -1;
                    if(H5Pset_deflate(dcpl_id,aggression)<0)
                        return -1;
                }
                break;

           /*-------------------------------------------------------------------------
            * H5Z_FILTER_SZIP       4 , szip compression
            *-------------------------------------------------------------------------
            */
            case H5Z_FILTER_SZIP:
                {
                    unsigned  options_mask;
                    unsigned  pixels_per_block;

                    options_mask     = obj.filter[i].cd_values[0];
                    pixels_per_block = obj.filter[i].cd_values[1];

                    /* set up for szip data */
                    if(H5Pset_chunk(dcpl_id,obj.chunk.rank,obj.chunk.chunk_lengths)<0)
                        return -1;
                    if (H5Pset_szip(dcpl_id,options_mask,pixels_per_block)<0)
                        return -1;

                }
                break;

           /*-------------------------------------------------------------------------
            * H5Z_FILTER_SHUFFLE    2 , shuffle the data
            *-------------------------------------------------------------------------
            */
            case H5Z_FILTER_SHUFFLE:
                if(H5Pset_chunk(dcpl_id, obj.chunk.rank, obj.chunk.chunk_lengths)<0)
                    return -1;
                if (H5Pset_shuffle(dcpl_id)<0)
                    return -1;
                break;

           /*-------------------------------------------------------------------------
            * H5Z_FILTER_FLETCHER32 3 , fletcher32 checksum of EDC
            *-------------------------------------------------------------------------
            */
            case H5Z_FILTER_FLETCHER32:
                if(H5Pset_chunk(dcpl_id, obj.chunk.rank, obj.chunk.chunk_lengths)<0)
                    return -1;
                if (H5Pset_fletcher32(dcpl_id)<0)
                    return -1;
                break;
           /*----------- -------------------------------------------------------------
            * H5Z_FILTER_NBIT , NBIT compression
            *-------------------------------------------------------------------------
            */
            case H5Z_FILTER_NBIT:
                if(H5Pset_chunk(dcpl_id, obj.chunk.rank, obj.chunk.chunk_lengths)<0)
                    return -1;
                if (H5Pset_nbit(dcpl_id)<0)
                    return -1;
                break;
            /*----------- -------------------------------------------------------------
             * H5Z_FILTER_SCALEOFFSET , scale+offset compression
             *-------------------------------------------------------------------------
             */

            case H5Z_FILTER_SCALEOFFSET:
                {
                    H5Z_SO_scale_type_t scale_type;
                    int                 scale_factor;

                    scale_type   = (H5Z_SO_scale_type_t)obj.filter[i].cd_values[0];
                    scale_factor = (int)obj.filter[i].cd_values[1];

                    if(H5Pset_chunk(dcpl_id, obj.chunk.rank, obj.chunk.chunk_lengths)<0)
                        return -1;
                    if (H5Pset_scaleoffset(dcpl_id,scale_type,scale_factor)<0)
                        return -1;
                }
                break;
            default:
            	{
            		if (H5Pset_filter (dcpl_id, obj.filter[i].filtn, H5Z_FLAG_MANDATORY, obj.filter[i].cd_nelmts, obj.filter[i].cd_values)<0)
                		return -1;
            		if(H5Pset_chunk(dcpl_id, obj.chunk.rank, obj.chunk.chunk_lengths)<0)
            			return -1;
            	}
                break;
            } /* switch */
        }/*i*/

    }
    /*obj.nfilters*/

    /*-------------------------------------------------------------------------
    * layout
    *-------------------------------------------------------------------------
    */

    if (obj.layout>=0)
    {
        /* a layout was defined */
        if (H5Pset_layout(dcpl_id, obj.layout)<0)
            return -1;

        if (H5D_CHUNKED == obj.layout)
        {
            if(H5Pset_chunk(dcpl_id, obj.chunk.rank, obj.chunk.chunk_lengths)<0)
                return -1;
        }
        else if (H5D_COMPACT == obj.layout)
        {
            if (H5Pset_alloc_time(dcpl_id, H5D_ALLOC_TIME_EARLY)<0)
                return -1;
        }
        /* remove filters for the H5D_CONTIGUOUS case */
        else if (H5D_CONTIGUOUS == obj.layout)
        {
            if (H5Premove_filter(dcpl_id,H5Z_FILTER_ALL)<0)
                return -1;
        }

    }

 return 0;
}

