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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include "hdf5.h"
#include "h5test.h"
#include "h5repack.h"
/*-------------------------------------------------------------------------
* Function: aux_objinsert_filter
*
* Purpose: auxiliary function, inserts the filter in object OBJ
*
* Return: void
*
*-------------------------------------------------------------------------
*/
static void aux_objinsert_filter(pack_info_t *obj,
filter_info_t filt)
{
obj->nfilters=1;
obj->filter[0]=filt;
}
/*-------------------------------------------------------------------------
* Function: filter_this
*
* 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
*
* Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
*
* Date: December 19, 2003
*
*-------------------------------------------------------------------------
*/
int filter_this(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;
int i, j;
/* if we are applying to all objects just return true */
if (options->all_filter)
{
/* assign the global filter and chunk info to the OBJ info */
aux_objinsert_filter( obj, options->filter_g );
obj->chunk=options->chunk_g;
return 1;
}
for ( i=0; i<options->op_tbl->nelems; i++)
{
for ( j=0; j<options->op_tbl->objs[i].nfilters; j++)
{
if (options->op_tbl->objs[i].filter[j].filtn != -1 )
{
if (strcmp(options->op_tbl->objs[i].path,name)==0)
{
*obj=options->op_tbl->objs[i];
return 1;
}
pdest = strstr(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 1;
}
} /*if*/
}/*j*/
}/*i*/
return 0;
}
/*-------------------------------------------------------------------------
* 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 */
hid_t dcpl_id, /* dataset creation property list */
hid_t type_id, /* dataset datatype */
pack_opt_t *options, /* repack options */
int has_layout, /* input chunk */
pack_info_t *obj) /* info about object to filter */
{
int nfilters; /* number of filters in DCPL */
unsigned aggression; /* the deflate level */
hsize_t nelmts; /* number of elements in dataset */
size_t size; /* size of datatype in bytes */
int i;
/* check first if the object is to be filtered */
if (filter_this(name,options,obj)==0)
return 0;
if (rank==0)
goto out;
/*-------------------------------------------------------------------------
* filters require CHUNK layout; if we do not have one define a default
*-------------------------------------------------------------------------
*/
if (has_layout)
{
layout_this(dcpl_id,name,options,obj);
}
else
{
obj->chunk.rank=rank;
for (i=0; i<rank; i++)
obj->chunk.chunk_lengths[i] = dims[i];
}
/* check for datasets too small */
if ((size=H5Tget_size(type_id))==0)
return 0;
nelmts=1;
for (i=0; i<rank; i++)
nelmts*=dims[i];
if (nelmts*size < options->threshold )
{
if (options->verbose)
printf("Warning: Filter not applied to <%s>. Dataset smaller than <%d> bytes\n",
name,(int)options->threshold);
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
*-------------------------------------------------------------------------
*/
if (nfilters) {
if (H5Premove_filter(dcpl_id,H5Z_FILTER_ALL)<0)
return -1;
}
/*-------------------------------------------------------------------------
* 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
*-------------------------------------------------------------------------
*/
for ( i=0; i<obj->nfilters; i++)
{
switch (obj->filter[i].filtn)
{
default:
break;
/*-------------------------------------------------------------------------
* H5Z_FILTER_DEFLATE 1 , deflation like gzip
*-------------------------------------------------------------------------
*/
case H5Z_FILTER_DEFLATE:
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;
pixels_per_block=obj->filter[i].cd_values[0];
if (obj->filter[i].szip_coding==0)
options_mask=H5_SZIP_NN_OPTION_MASK;
else
options_mask=H5_SZIP_EC_OPTION_MASK;
/* 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;
} /* switch */
}/*i*/
return 0;
out:
if (options->verbose)
printf("Warning: Filter could not be applied to <%s>\n",name);
return 0;
}
/*-------------------------------------------------------------------------
* Function: print_filters
*
* Purpose: print the filters in DCPL
*
* Return: 0, ok, -1 no
*
* Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
*
* Date: December 19, 2003
*
*-------------------------------------------------------------------------
*/
int print_filters(hid_t dcpl_id)
{
int nfilters; /* number of filters */
unsigned filt_flags; /* filter flags */
H5Z_filter_t filtn; /* filter identification number */
unsigned cd_values[20]; /* filter client data values */
size_t cd_nelmts; /* filter client number of values */
size_t cd_num; /* filter client data counter */
char f_name[256]; /* filter name */
char s[64]; /* temporary string buffer */
int i;
/* get information about filters */
if ((nfilters = H5Pget_nfilters(dcpl_id))<0)
return -1;
for (i=0; i<nfilters; i++)
{
cd_nelmts = NELMTS(cd_values);
#ifdef H5_WANT_H5_V1_6_COMPAT
filtn = H5Pget_filter(dcpl_id,
(unsigned)i,
&filt_flags,
&cd_nelmts,
cd_values,
sizeof(f_name),
f_name);
#else
filtn = H5Pget_filter(dcpl_id,
(unsigned)i,
&filt_flags,
&cd_nelmts,
cd_values,
sizeof(f_name),
f_name,
NULL);
#endif /* H5_WANT_H5_V1_6_COMPAT */
f_name[sizeof(f_name)-1] = '\0';
sprintf(s, "Filter-%d:", i);
printf(" %-10s %s-%u %s {", s,
f_name[0]?f_name:"method",
(unsigned)filtn,
filt_flags & H5Z_FLAG_OPTIONAL?"OPT":"");
for (cd_num=0; cd_num<cd_nelmts; cd_num++) {
printf("%s%u", cd_num?", ":"", cd_values[cd_num]);
}
printf("}\n");
}
return 0;
}
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