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