101 lines
4.3 KiB
C
101 lines
4.3 KiB
C
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/*
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* Copyright (c) 2001-2003, David Janssens
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* Copyright (c) 2002-2003, Yannick Verschueren
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* Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
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* Copyright (c) 2005, Herv<EFBFBD> Drolon, FreeImage Team
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* Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
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* Copyrigth (c) 2006, M<EFBFBD>nica D<EFBFBD>ez, LPI-UVA, Spain
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __DWT_H
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#define __DWT_H
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/**
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@file dwt.h
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@brief Implementation of a discrete wavelet transform (DWT)
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The functions in DWT.C have for goal to realize forward and inverse discret wavelet
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transform with filter 5-3 (reversible) and filter 9-7 (irreversible). The functions in
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DWT.C are used by some function in TCD.C.
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*/
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/** @defgroup DWT DWT - Implementation of a discrete wavelet transform */
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/*@{*/
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/**
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DCCS-LIWT properties
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*/
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typedef struct opj_wtfilt {
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double *LPS;
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int lenLPS;
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double *HPS;
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int lenHPS;
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} opj_wtfilt_t;
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/** @name Funciones generales */
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/*@{*/
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/* ----------------------------------------------------------------------- */
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/**
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Forward 5-3 wavelet tranform in 3-D.
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Apply a reversible DWT transform to a component of an volume.
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@param tilec Tile component information (current tile)
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@param dwtid Number of identification of wavelet kernel(s) used in DWT in each direction
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*/
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void dwt_encode(opj_tcd_tilecomp_t * tilec, int dwtid[3]);
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/**
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Inverse 5-3 wavelet tranform in 3-D.
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Apply a reversible inverse DWT transform to a component of an volume.
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@param tilec Tile component information (current tile)
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@param stops Number of decoded resolution levels in each dimension
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@param dwtid Number of identification of wavelet kernel(s) used in DWT in each dimension
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*/
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void dwt_decode(opj_tcd_tilecomp_t * tilec, int stops[3], int dwtid[3]);
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/* ----------------------------------------------------------------------- */
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/**
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Get the gain of a subband for the reversible 3-D DWT.
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@param orient Number that identifies the subband (0->LLL, 1->HLL, 2->LHL, 3->HHL, 4->LLH, 5->HLH, 6->LHH, 7->HHH)
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@param reversible Wavelet transformation type
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@return Returns 0 if orient = 0, returns 1 if orient = 1,2 or 4, returns 2 if orient = 3,5 or 6, returns 3 otherwise
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*/
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int dwt_getgain(int orient, int reversible);
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/**
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Get the norm of a wavelet function of a subband at a specified level for the reversible 5-3 DWT or irreversible 9-7 in 3-D.
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@param orient Band of the wavelet function
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@param level Levels of the wavelet function in X,Y,Z axis
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@param dwtid Wavelet transformation identifier
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@return Returns the norm of the wavelet function
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*/
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double dwt_getnorm(int orient, int level[3], int dwtid[3]);
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/* ----------------------------------------------------------------------- */
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/**
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Calcula el valor del escal<EFBFBD>n de cuantificaci<EFBFBD>n correspondiente a cada subbanda.
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@param tccp Tile component coding parameters
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@param prec Precision of data
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*/
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void dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, int prec);
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/*@}*/
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#endif /* __DWT_H */
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