/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #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 */ H5Z_class_t H5Z_SZIP[1] = {{ H5Z_CLASS_T_VERS, /* H5Z_class_t version */ H5Z_FILTER_SZIP, /* Filter id number */ 1, /* Assume encoder present: check before registering */ 1, /* decoder_present flag (set to true) */ "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 */ }}; /* Local macros */ #define H5Z_SZIP_USER_NPARMS 2 /* Number of parameters that users can set */ #define H5Z_SZIP_TOTAL_NPARMS 4 /* Total number of parameters for filter */ #define H5Z_SZIP_PARM_MASK 0 /* "User" parameter for option mask */ #define H5Z_SZIP_PARM_PPB 1 /* "User" parameter for pixels-per-block */ #define H5Z_SZIP_PARM_BPP 2 /* "Local" parameter for bits-per-pixel */ #define H5Z_SZIP_PARM_PPS 3 /* "Local" parameter for pixels-per-scanline */ /*------------------------------------------------------------------------- * 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) /* 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 */ #ifdef H5_WANT_H5_V1_6_COMPAT if(H5Pget_filter_by_id(dcpl_id,H5Z_FILTER_SZIP,&flags,&cd_nelmts, cd_values,0,NULL)<0) #else if(H5Pget_filter_by_id(dcpl_id,H5Z_FILTER_SZIP,&flags,&cd_nelmts, cd_values,0,NULL,NULL)<0) #endif 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_precision24) { 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