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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 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://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#define H5Z_PACKAGE /*suppress error about including H5Zpkg */
#include "H5private.h" /* Generic Functions */
#include "H5Eprivate.h" /* Error handling */
#include "H5Fprivate.h" /* File access */
#include "H5MMprivate.h" /* Memory management */
#include "H5Oprivate.h" /* Object headers */
#include "H5Ppublic.h" /* Property lists */
#include "H5Tpublic.h" /* Datatype functions */
#include "H5Zpkg.h" /* Data filters */
#ifdef H5_HAVE_FILTER_SZIP
#ifdef H5_HAVE_SZLIB_H
# include "szlib.h"
#endif
/* Local function prototypes */
static herr_t H5Z_can_apply_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id);
static herr_t H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id);
static size_t H5Z_filter_szip (unsigned flags, size_t cd_nelmts,
const unsigned cd_values[], size_t nbytes, size_t *buf_size, void **buf);
/* This message derives from H5Z */
const H5Z_class_t H5Z_SZIP[1] = {{
H5Z_FILTER_SZIP, /* Filter id number */
"szip", /* Filter name for debugging */
H5Z_can_apply_szip, /* The "can apply" callback */
H5Z_set_local_szip, /* The "set local" callback */
H5Z_filter_szip, /* The actual filter function */
}};
/*-------------------------------------------------------------------------
* Function: H5Z_can_apply_szip
*
* Purpose: Check the parameters for szip compression for validity and
* whether they fit a particular dataset.
*
* Note: This function currently range-checks for datatypes with
* 8-bit boundaries (8, 16, 24, etc.). It appears that the szip
* library can actually handle 1-24, 32 & 64 bit samples. If
* this becomes important, we should make the checks below more
* sophisticated and have them check for n-bit datatypes of the
* correct size, etc. - QAK
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* Monday, April 7, 2003
*
* Modifications:
*
*-------------------------------------------------------------------------
*/
static herr_t
H5Z_can_apply_szip(hid_t UNUSED dcpl_id, hid_t type_id, hid_t UNUSED space_id)
{
unsigned dtype_size; /* Datatype's size (in bits) */
H5T_order_t dtype_order; /* Datatype's endianness order */
herr_t ret_value=TRUE; /* Return value */
FUNC_ENTER_NOAPI(H5Z_can_apply_szip, FAIL)
/* If this is the Szip filter, make sure it can encode */
if (SZ_encoder_enabled()<=0)
HGOTO_ERROR(H5E_PLINE, H5E_NOENCODER, FAIL, "Filter present but encoding is disabled.");
/* Get datatype's size, for checking the "bits-per-pixel" */
if((dtype_size=(8*H5Tget_size(type_id)))==0)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
/* Range check datatype's size */
if(dtype_size>32 && dtype_size!=64)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype size")
/* Get datatype's endianness order */
if((dtype_order=H5Tget_order(type_id))==H5T_ORDER_ERROR)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "can't retrieve datatype endianness order")
/* Range check datatype's endianness order */
/* (Note: this may not handle non-atomic datatypes well) */
if(dtype_order != H5T_ORDER_LE && dtype_order != H5T_ORDER_BE)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype endianness order")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5Z_can_apply_szip() */
/*-------------------------------------------------------------------------
* Function: H5Z_set_local_szip
*
* Purpose: Set the "local" dataset parameters for szip compression.
*
* Return: Success: Non-negative
* Failure: Negative
*
* Programmer: Quincey Koziol
* Monday, April 7, 2003
*
* Modifications: Used new logic to set the size of the scanline parameter.
* Now SZIP compression can be applied to the chunk
* of any shape and size with only one restriction: the number
* of elements in the chunk has to be not less than number
* of elements (pixels) in the block (cd_values[H5Z_SZIP_PARM_PPB]
* parameter).
* Elena Pourmal, July 20, 2004
*
*-------------------------------------------------------------------------
*/
static herr_t
H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
{
unsigned flags; /* Filter flags */
size_t cd_nelmts=H5Z_SZIP_USER_NPARMS; /* Number of filter parameters */
unsigned cd_values[H5Z_SZIP_TOTAL_NPARMS]; /* Filter parameters */
hsize_t dims[H5O_LAYOUT_NDIMS]; /* Dataspace (i.e. chunk) dimensions */
int ndims; /* Number of (chunk) dimensions */
H5T_order_t dtype_order; /* Datatype's endianness order */
int dtype_size; /* Datatype's size (in bits) */
size_t dtype_precision; /* Datatype's precision (in bits) */
size_t dtype_offset; /* Datatype's offset (in bits) */
hsize_t scanline; /* Size of dataspace's fastest changing dimension */
herr_t ret_value=SUCCEED; /* Return value */
FUNC_ENTER_NOAPI(H5Z_set_local_szip, FAIL)
/* Get the filter's current parameters */
if(H5Pget_filter_by_id(dcpl_id,H5Z_FILTER_SZIP,&flags,&cd_nelmts, cd_values,0,NULL)<0)
HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get szip parameters");
/* Get datatype's size, for checking the "bits-per-pixel" */
if((dtype_size=(8*H5Tget_size(type_id)))==0)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size");
/* Get datatype's precision, in case is less than full bits */
if((dtype_precision=H5Tget_precision(type_id))==0)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype precision");
if(dtype_precision<dtype_size) {
dtype_offset=H5Tget_offset(type_id);
if(dtype_offset != 0) {
dtype_precision=dtype_size;
}
}
if (dtype_precision>24) {
if (dtype_precision <= 32) {
dtype_precision=32;
} else if ( dtype_precision <= 64) {
dtype_precision=64;
}
}
/* Set "local" parameter for this dataset's "bits-per-pixel" */
cd_values[H5Z_SZIP_PARM_BPP]=dtype_precision;
/* Get dimensions for dataspace */
if ((ndims=H5Sget_simple_extent_dims(space_id, dims, NULL))<0)
HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "unable to get dataspace dimensions")
/* Set "local" parameter for this dataset's "pixels-per-scanline" */
/* (Use the chunk's fastest changing dimension size) */
assert(ndims>0);
scanline=dims[ndims-1];
/* Adjust scanline if it is smaller than number of pixels per block or
if it is bigger than maximum pixels per scanline, or there are more than
SZ_MAX_BLOCKS_PER_SCANLINE blocks per scanline */
/* Check the pixels per block against the 'scanline' size */
if(scanline<cd_values[H5Z_SZIP_PARM_PPB]) {
hssize_t npoints; /* Number of points in the dataspace */
/* Get number of elements for the dataspace; use
total number of elements in the chunk to define the new 'scanline' size */
if ((npoints=H5Sget_simple_extent_npoints(space_id))<0)
HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "unable to get number of points in the dataspace")
if(npoints<cd_values[H5Z_SZIP_PARM_PPB])
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "pixels per block greater than total number of elements in the chunk")
scanline = MIN((cd_values[H5Z_SZIP_PARM_PPB] * SZ_MAX_BLOCKS_PER_SCANLINE), npoints);
}
else {
if(scanline <= SZ_MAX_PIXELS_PER_SCANLINE)
scanline = MIN((cd_values[H5Z_SZIP_PARM_PPB] * SZ_MAX_BLOCKS_PER_SCANLINE), scanline);
else
scanline = cd_values[H5Z_SZIP_PARM_PPB] * SZ_MAX_BLOCKS_PER_SCANLINE;
} /* end else */
/* Assign the final value to the scanline */
H5_ASSIGN_OVERFLOW(cd_values[H5Z_SZIP_PARM_PPS],scanline,hsize_t,unsigned);
/* Get datatype's endianness order */
if((dtype_order=H5Tget_order(type_id))==H5T_ORDER_ERROR)
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
/* Set the correct endianness flag for szip */
/* (Note: this may not handle non-atomic datatypes well) */
cd_values[H5Z_SZIP_PARM_MASK] &= ~(SZ_LSB_OPTION_MASK|SZ_MSB_OPTION_MASK);
switch(dtype_order) {
case H5T_ORDER_LE: /* Little-endian byte order */
cd_values[H5Z_SZIP_PARM_MASK] |= SZ_LSB_OPTION_MASK;
break;
case H5T_ORDER_BE: /* Big-endian byte order */
cd_values[H5Z_SZIP_PARM_MASK] |= SZ_MSB_OPTION_MASK;
break;
default:
HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
} /* end switch */
/* Modify the filter's parameters for this dataset */
if(H5Pmodify_filter(dcpl_id, H5Z_FILTER_SZIP, flags, H5Z_SZIP_TOTAL_NPARMS, cd_values)<0)
HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local szip parameters")
done:
FUNC_LEAVE_NOAPI(ret_value)
} /* end H5Z_set_local_szip() */
/*-------------------------------------------------------------------------
* Function: H5Z_filter_szip
*
* Purpose: Implement an I/O filter around the 'rice' algorithm in
* libsz
*
* Return: Success: Size of buffer filtered
* Failure: 0
*
* Programmer: Kent Yang
* Tuesday, April 1, 2003
*
* Modifications:
* Quincey Koziol, April 2, 2003
* Cleaned up code.
*
*-------------------------------------------------------------------------
*/
static size_t
H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
size_t nbytes, size_t *buf_size, void **buf)
{
size_t ret_value = 0; /* Return value */
size_t size_out = 0; /* Size of output buffer */
unsigned char *outbuf = NULL; /* Pointer to new output buffer */
unsigned char *newbuf = NULL; /* Pointer to input buffer */
SZ_com_t sz_param; /* szip parameter block */
FUNC_ENTER_NOAPI(H5Z_filter_szip, 0)
/* Sanity check to make certain that we haven't drifted out of date with
* the mask options from the szlib.h header */
assert(H5_SZIP_ALLOW_K13_OPTION_MASK==SZ_ALLOW_K13_OPTION_MASK);
assert(H5_SZIP_CHIP_OPTION_MASK==SZ_CHIP_OPTION_MASK);
assert(H5_SZIP_EC_OPTION_MASK==SZ_EC_OPTION_MASK);
assert(H5_SZIP_LSB_OPTION_MASK==SZ_LSB_OPTION_MASK);
assert(H5_SZIP_MSB_OPTION_MASK==SZ_MSB_OPTION_MASK);
assert(H5_SZIP_NN_OPTION_MASK==SZ_NN_OPTION_MASK);
assert(H5_SZIP_RAW_OPTION_MASK==SZ_RAW_OPTION_MASK);
/* Check arguments */
if (cd_nelmts!=4)
HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid deflate aggression level")
/* Copy the filter parameters into the szip parameter block */
H5_ASSIGN_OVERFLOW(sz_param.options_mask,cd_values[H5Z_SZIP_PARM_MASK],unsigned,int);
H5_ASSIGN_OVERFLOW(sz_param.bits_per_pixel,cd_values[H5Z_SZIP_PARM_BPP],unsigned,int);
H5_ASSIGN_OVERFLOW(sz_param.pixels_per_block,cd_values[H5Z_SZIP_PARM_PPB],unsigned,int);
H5_ASSIGN_OVERFLOW(sz_param.pixels_per_scanline,cd_values[H5Z_SZIP_PARM_PPS],unsigned,int);
/* Input; uncompress */
if (flags & H5Z_FLAG_REVERSE) {
uint32_t stored_nalloc; /* Number of bytes the compressed block will expand into */
size_t nalloc; /* Number of bytes the compressed block will expand into */
/* Get the size of the uncompressed buffer */
newbuf = *buf;
UINT32DECODE(newbuf,stored_nalloc);
H5_ASSIGN_OVERFLOW(nalloc,stored_nalloc,uint32_t,size_t);
/* Allocate space for the uncompressed buffer */
if(NULL==(outbuf = H5MM_malloc(nalloc)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed for szip decompression")
/* Decompress the buffer */
size_out=nalloc;
if(SZ_BufftoBuffDecompress(outbuf, &size_out, newbuf, nbytes-4, &sz_param) != SZ_OK)
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "szip_filter: decompression failed")
assert(size_out==nalloc);
/* Free the input buffer */
H5MM_xfree(*buf);
/* Set return values */
*buf = outbuf;
outbuf = NULL;
*buf_size = nalloc;
ret_value = nalloc;
}
/* Output; compress */
else {
unsigned char *dst = NULL; /* Temporary pointer to new output buffer */
/* Allocate space for the compressed buffer & header (assume data won't get bigger) */
if(NULL==(dst=outbuf = H5MM_malloc(nbytes+4)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "unable to allocate szip destination buffer")
/* Encode the uncompressed length */
H5_CHECK_OVERFLOW(nbytes,size_t,uint32_t);
UINT32ENCODE(dst,nbytes);
/* Compress the buffer */
size_out = nbytes;
if(SZ_OK!= SZ_BufftoBuffCompress(dst, &size_out, *buf, nbytes, &sz_param))
HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, 0, "overflow")
assert(size_out<=nbytes);
/* Free the input buffer */
H5MM_xfree(*buf);
/* Set return values */
*buf = outbuf;
outbuf = NULL;
*buf_size = size_out+4;
ret_value = size_out+4;
}
done:
if(outbuf)
H5MM_xfree(outbuf);
FUNC_LEAVE_NOAPI(ret_value)
}
#endif /* H5_HAVE_FILTER_SZIP */
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