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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: 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) /* info about object to filter */
{
char *pdest;
int result;
int i;
/* 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 */
obj->filter=options->filter_g;
obj->chunk=options->chunk_g;
return 1;
}
for ( i=0; i<options->op_tbl->nelems; i++)
{
if (options->op_tbl->objs[i].filter.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;
}
}
}
return 0;
}
/*-------------------------------------------------------------------------
* Function: apply_filter
*
* Purpose: apply a filter to the property list; do extra checking
* in the case of SZIP
*
* Return: 0, ok, -1 no
*
* Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
*
* Date: December 19, 2003
*
*-------------------------------------------------------------------------
*/
int apply_filter(hid_t dcpl_id,
size_t size, /* size of datatype in bytes */
pack_opt_t *options, /* repack options */
pack_info_t *obj) /* info about object to filter */
{
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/file name */
char s[64]; /* temporary string buffer */
int i;
unsigned aggression; /* the deflate level */
unsigned szip_options_mask=H5_SZIP_NN_OPTION_MASK;
unsigned szip_pixels_per_block;
/* get information about filters */
if ((nfilters = H5Pget_nfilters(dcpl_id))<0)
return -1;
for (i=0; i<nfilters; i++)
{
cd_nelmts = NELMTS(cd_values);
filtn = H5Pget_filter(dcpl_id,
i,
&filt_flags,
&cd_nelmts,
cd_values,
sizeof(f_name),
f_name);
if (options->verbose)
{
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");
}
}
/*
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
*/
switch (obj->filter.filtn)
{
case H5Z_FILTER_NONE:
break;
case H5Z_FILTER_DEFLATE:
aggression=obj->filter.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;
case H5Z_FILTER_SZIP:
szip_pixels_per_block=obj->filter.cd_values[0];
/* check szip parameters */
if (check_szip(obj->chunk.rank,
obj->chunk.chunk_lengths,
size,
szip_options_mask,
szip_pixels_per_block)==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, szip_options_mask, szip_pixels_per_block)<0)
return -1;
}
else
{
printf("SZIP filter cannot be applied\n");
}
break;
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;
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;
default:
break;
} /* switch */
return 0;
}
/*-------------------------------------------------------------------------
* Function: check_szip
*
* Purpose: utility to check SZIP parameters
*
* SZIP compresses data block by block, with a user-tunable block size.
* This block size is passed in the parameter pixels_per_block and must be even,
* with typical values being 8, 10, 16, and 32. The more pixel values vary,
* the smaller this number should be. For optimal performance, the number of
* pixels per scan line (i.e., the size of the fastest-changing dimension in the chunk)
* should be an even multiple of the number of pixels per block.
*
* Return: 1=can apply the filter
* 0=cannot apply the filter
*
* Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
*
* Date: December 23, 2003
*
*-------------------------------------------------------------------------
*/
int check_szip(int rank, /* chunk rank */
hsize_t *dims, /* chunk dims */
size_t size, /* size of datatype in bytes */
unsigned szip_options_mask,
unsigned szip_pixels_per_block)
{
szip_comp_t szip;
int i;
/*
pixels_per_scanline = size of the fastest-changing dimension
Must be <= MAX_PIXELS_PER_SCANLINE and <= pixels
*/
szip.pixels_per_scanline = (unsigned)dims[rank-1];
szip.pixels = 1;
for ( i = 0; i < rank; i++)
{
szip.pixels *= dims[i];
}
if (szip.pixels_per_scanline > MAX_PIXELS_PER_SCANLINE)
{
printf("Warning: in SZIP setting, pixels per scanline was set to <%d>, \
MAX_PIXELS_PER_SCANLINE\n",MAX_PIXELS_PER_SCANLINE);
szip.pixels_per_scanline = MAX_PIXELS_PER_SCANLINE;
}
/*
pixels_per_block must be an even number, and <= pixels_per_scanline
and <= MAX_PIXELS_PER_BLOCK
*/
szip.pixels_per_block=szip_pixels_per_block;
if (szip.pixels_per_block > szip.pixels_per_scanline)
{
printf("\n\tWarning: in SZIP setting, pixels per block <%d>, \
cannot be greater than pixels per scanline<%d>\n",
szip.pixels_per_block, szip.pixels_per_scanline);
return 0;
}
szip.options_mask = szip_options_mask;
szip.compression_mode = NN_MODE;
/*
bits_per_pixel
Must be in range 1..24,32,64
*/
switch(size)
{
case 0:
/* size was not provided for test */
szip.bits_per_pixel = 0;
break;
case 1:
szip.bits_per_pixel = 8;
break;
case 2:
szip.bits_per_pixel = 16;
break;
case 4:
szip.bits_per_pixel = 32;
break;
case 8:
szip.bits_per_pixel = 64;
break;
default:
printf("Error: Bad numeric type of size <%d> in SZIP\n",size);
return 0;
}
return check_szip_params( szip.bits_per_pixel,
szip.pixels_per_block,
szip.pixels_per_scanline,
szip.pixels);
}
/*-------------------------------------------------------------------------
* Function: check_szip_params
*
* Purpose: Adapted from rice.c. Checks the SZIP parameters
*
* Return: 1=can apply the filter
* 0=cannot apply the filter
*
*-------------------------------------------------------------------------
*/
int check_szip_params( unsigned bits_per_pixel,
unsigned pixels_per_block,
unsigned pixels_per_scanline,
hsize_t image_pixels)
{
if (pixels_per_block & 1)
{
printf("Pixels per block must be even.\n");
return 0;
}
if (pixels_per_block > pixels_per_scanline)
{
printf("Pixels per block is greater than pixels per scanline.\n");
return 0;
}
if (bits_per_pixel) /* if provided for test */
{
if (bits_per_pixel >= 1 && bits_per_pixel <= 24)
;
else if (bits_per_pixel == 32 || bits_per_pixel == 64)
;
else
{
printf("bits per pixel must be in range 1..24,32,64");
return 0;
}
}
if (pixels_per_block > MAX_PIXELS_PER_BLOCK)
{
printf("maximum pixels per block exceeded");
return 0;
}
if (pixels_per_block & 1)
{
printf("pixels per block must be even");
return 0;
}
if (pixels_per_block > pixels_per_scanline)
{
printf("pixels per block > pixels per scanline");
return 0;
}
if (pixels_per_scanline > MAX_PIXELS_PER_SCANLINE)
{
printf("maximum pixels per scanline exceeded");
return 0;
}
if (image_pixels < pixels_per_scanline)
{
printf("image pixels less than pixels per scanline");
return 0;
}
if (image_pixels % pixels_per_scanline)
{
printf("Pixels (%d) must be integer multiple of pixels per scanline (%d)\n",
(unsigned)image_pixels,pixels_per_scanline);
return 0;
}
#if 0
if (pixels_per_scanline % pixels_per_block)
{
printf("Pixels per scanline (%d) must be an integer multiple of pixels per block (%d)\n",
pixels_per_scanline, pixels_per_block);
return 0;
}
#endif
return 1;
}
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