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diff --git a/src/H5Zmodule.h b/src/H5Zmodule.h new file mode 100644 index 0000000..ec21e50 --- /dev/null +++ b/src/H5Zmodule.h @@ -0,0 +1,124 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by The HDF Group. * + * 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://www.hdfgroup.org/licenses. * + * If you do not have access to either file, you may request a copy from * + * help@hdfgroup.org. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/* + * Programmer: Quincey Koziol + * Saturday, September 12, 2015 + * + * Purpose: This file contains declarations which define macros for the + * H5Z package. Including this header means that the source file + * is part of the H5Z package. + */ +#ifndef H5Zmodule_H +#define H5Zmodule_H + +/* Define the proper control macros for the generic FUNC_ENTER/LEAVE and error + * reporting macros. + */ +#define H5Z_MODULE +#define H5_MY_PKG H5Z +#define H5_MY_PKG_ERR H5E_PLINE + +/** \page H5Z_UG The HDF5 Filters + * @todo Under Construction + */ + +/** + * \defgroup H5Z Filters (H5Z) + * + * Use the functions in this module to manage HDF5 filters. + * + * User-defined filters are created by registering a filter descriptor of + * type #H5Z_class_t with the library. + * + * Available filters can be read or examined at runtime. + * + * It is conceivable that filters are stateful and that that state be + * updated at runtime. + * + * Filters are deleted by unregistering. + * + * <table> + * <tr><th>Create</th><th>Read</th></tr> + * <tr valign="top"> + * <td> + * \snippet{lineno} H5Z_examples.c filter + * \snippet{lineno} H5Z_examples.c create + * </td> + * <td> + * \snippet{lineno} H5Z_examples.c read + * </td> + * </tr> + * <tr><th>Update</th><th>Delete</th></tr> + * <tr valign="top"> + * <td> + * \snippet{lineno} H5Z_examples.c update + * </td> + * <td> + * \snippet{lineno} H5Z_examples.c delete + * </tr> + * </table> + * + * HDF5 supports a filter pipeline that provides the capability for standard and + * customized raw data processing during I/O operations. HDF5 is distributed + * with a small set of standard filters such as compression (gzip, SZIP, and a + * shuffling algorithm) and error checking (Fletcher32 checksum). For further + * flexibility, the library allows a user application to extend the pipeline + * through the creation and registration of customized filters. + * + * The flexibility of the filter pipeline implementation enables the definition + * of additional filters by a user application. A filter + * \li is associated with a dataset when the dataset is created, + * \li can be used only with chunked data (i.e., datasets stored in the + * #H5D_CHUNKED storage layout), and + * \li is applied independently to each chunk of the dataset. + * + * The HDF5 library does not support filters for contiguous datasets because of + * the difficulty of implementing random access for partial I/O. Compact dataset + * filters are not supported because it would not produce significant results. + * + * Filter identifiers for the filters distributed with the HDF5 + * Library are as follows: + * <table> + * <tr><td>#H5Z_FILTER_DEFLATE</td><td>The gzip compression, or + * deflation, filter</td></tr> + * <tr><td>#H5Z_FILTER_SZIP</td><td>The SZIP compression + * filter</td></tr> + * <tr><td>#H5Z_FILTER_NBIT</td><td>The N-bit compression + * filter</td></tr> + * <tr><td>#H5Z_FILTER_SCALEOFFSET</td><td>The scale-offset + * compression filter</td></tr> + * <tr><td>#H5Z_FILTER_SHUFFLE</td><td>The shuffle algorithm + * filter</td></tr> + * <tr><td>#H5Z_FILTER_FLETCHER32</td><td>The Fletcher32 checksum, + * or error checking, filter</td></tr> + * </table> + * Custom filters that have been registered with the library will have + * additional unique identifiers. + * + * See \ref_dld_filters for more information on how an HDF5 application can + * apply a filter that is not registered with the HDF5 library. + * + * \defgroup H5ZPRE Predefined Filters + * \ingroup H5Z + * \defgroup FLETCHER32 Checksum Filter + * \ingroup H5ZPRE + * \defgroup SCALEOFFSET Scale-Offset Filter + * \ingroup H5ZPRE + * \defgroup SHUFFLE Shuffle Filter + * \ingroup H5ZPRE + * \defgroup SZIP Szip Filter + * \ingroup H5ZPRE + * + */ + +#endif /* H5Zmodule_H */ |