121 lines
4.1 KiB
C
121 lines
4.1 KiB
C
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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* All rights reserved. *
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* *
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* This file is part of HDF. The full HDF copyright notice, including *
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* terms governing use, modification, and redistribution, is contained in *
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* the COPYING file, which can be found at the root of the source code *
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* distribution tree, or in https://support.hdfgroup.org/ftp/HDF/releases/. *
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* If you do not have access to either file, you may request a copy from *
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* help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/* $Id$ */
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/*-----------------------------------------------------------------------------
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* File: cszip.h
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* Purpose: Header file for szip encoding information.
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* Dependencies: should only be included from hcompi.h
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* Invokes: none
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* Contents: Structures & definitions for szip encoding. This header
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* should only be included in hcomp.c and cszip.c.
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* Structure definitions:
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* Constant definitions:
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*---------------------------------------------------------------------------*/
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/* avoid re-inclusion */
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#ifndef __CSZIP_H
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#define __CSZIP_H
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#if defined c_plusplus || defined __cplusplus
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extern "C"
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{
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#endif /* c_plusplus || __cplusplus */
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/* Special parameters for szip compression */
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/* [These are aliases for the similar definitions in ricehdf.h header file] */
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#define H4_SZ_ALLOW_K13_OPTION_MASK 1
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#define H4_SZ_CHIP_OPTION_MASK 2
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#define H4_SZ_EC_OPTION_MASK 4
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#define H4_SZ_LSB_OPTION_MASK 8
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#define H4_SZ_MSB_OPTION_MASK 16
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#define H4_SZ_NN_OPTION_MASK 32
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#define H4_SZ_RAW_OPTION_MASK 128
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/*
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** from cszip.c
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*/
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HDFLIBAPI int32 HCPcszip_stread
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(accrec_t * rec);
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HDFLIBAPI int32 HCPcszip_stwrite
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(accrec_t * rec);
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HDFLIBAPI int32 HCPcszip_seek
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(accrec_t * access_rec, int32 offset, int origin);
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HDFLIBAPI int32 HCPcszip_inquire
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(accrec_t * access_rec, int32 *pfile_id, uint16 *ptag,
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uint16 *pref,
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int32 *plength, int32 *poffset, int32 *pposn, int16 *paccess,
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int16 *pspecial);
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HDFLIBAPI int32 HCPcszip_read
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(accrec_t * access_rec, int32 length, void * data);
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HDFLIBAPI int32 HCPcszip_write
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(accrec_t * access_rec, int32 length, const void * data);
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HDFLIBAPI intn HCPcszip_endaccess
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(accrec_t * access_rec);
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HDFLIBAPI intn HCPsetup_szip_parms
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( comp_info *c_info, int32 nt, int32 ncomp, int32 ndims, int32 *dims, int32 *cdims);
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#if defined c_plusplus || defined __cplusplus
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}
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#endif /* c_plusplus || __cplusplus */
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/* SZIP [en|de]coding information */
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typedef struct
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{
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int32 offset; /* offset in the file */
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uint8 *buffer; /* buffer for storing SZIP bytes */
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int32 buffer_pos;
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int32 buffer_size;
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int32 bits_per_pixel;
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int32 options_mask;
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int32 pixels;
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int32 pixels_per_block;
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int32 pixels_per_scanline;
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enum
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{
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SZIP_INIT, SZIP_RUN, SZIP_TERM
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}
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szip_state; /* state of the buffer storage */
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enum { SZIP_CLEAN, SZIP_DIRTY } szip_dirty;
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}
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comp_coder_szip_info_t;
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#define SZ_H4_REV_2 0x10000 /* special bit to signal revised format */
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#ifndef CSZIP_MASTER
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HDFLIBAPI funclist_t cszip_funcs; /* functions to perform szip encoding */
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#else
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funclist_t cszip_funcs =
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{ /* functions to perform szip encoding */
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HCPcszip_stread,
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HCPcszip_stwrite,
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HCPcszip_seek,
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HCPcszip_inquire,
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HCPcszip_read,
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HCPcszip_write,
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HCPcszip_endaccess
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};
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#endif
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#endif /* __CSZIP_H */
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