| /* |
| * The copyright in this software is being made available under the 2-clauses |
| * BSD License, included below. This software may be subject to other third |
| * party and contributor rights, including patent rights, and no such rights |
| * are granted under this license. |
| * |
| * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium |
| * Copyright (c) 2002-2014, Professor Benoit Macq |
| * Copyright (c) 2001-2003, David Janssens |
| * Copyright (c) 2002-2003, Yannick Verschueren |
| * Copyright (c) 2003-2007, Francois-Olivier Devaux |
| * Copyright (c) 2003-2014, Antonin Descampe |
| * Copyright (c) 2005, Herve Drolon, FreeImage Team |
| * 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 OPJ_DWT_H |
| #define OPJ_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 */ |
| /*@{*/ |
| |
| |
| /** @name Exported functions */ |
| /*@{*/ |
| /* ----------------------------------------------------------------------- */ |
| /** |
| Forward 5-3 wavelet transform in 2-D. |
| Apply a reversible DWT transform to a component of an image. |
| @param tilec Tile component information (current tile) |
| */ |
| OPJ_BOOL opj_dwt_encode(opj_tcd_tilecomp_t * tilec); |
| |
| /** |
| Inverse 5-3 wavelet transform in 2-D. |
| Apply a reversible inverse DWT transform to a component of an image. |
| @param p_tcd TCD handle |
| @param tilec Tile component information (current tile) |
| @param numres Number of resolution levels to decode |
| */ |
| OPJ_BOOL opj_dwt_decode(opj_tcd_t *p_tcd, |
| opj_tcd_tilecomp_t* tilec, |
| OPJ_UINT32 numres); |
| |
| /** |
| Get the gain of a subband for the reversible 5-3 DWT. |
| @param orient Number that identifies the subband (0->LL, 1->HL, 2->LH, 3->HH) |
| @return Returns 0 if orient = 0, returns 1 if orient = 1 or 2, returns 2 otherwise |
| */ |
| OPJ_UINT32 opj_dwt_getgain(OPJ_UINT32 orient) ; |
| /** |
| Get the norm of a wavelet function of a subband at a specified level for the reversible 5-3 DWT. |
| @param level Level of the wavelet function |
| @param orient Band of the wavelet function |
| @return Returns the norm of the wavelet function |
| */ |
| OPJ_FLOAT64 opj_dwt_getnorm(OPJ_UINT32 level, OPJ_UINT32 orient); |
| /** |
| Forward 9-7 wavelet transform in 2-D. |
| Apply an irreversible DWT transform to a component of an image. |
| @param tilec Tile component information (current tile) |
| */ |
| OPJ_BOOL opj_dwt_encode_real(opj_tcd_tilecomp_t * tilec); |
| /** |
| Inverse 9-7 wavelet transform in 2-D. |
| Apply an irreversible inverse DWT transform to a component of an image. |
| @param p_tcd TCD handle |
| @param tilec Tile component information (current tile) |
| @param numres Number of resolution levels to decode |
| */ |
| OPJ_BOOL opj_dwt_decode_real(opj_tcd_t *p_tcd, |
| opj_tcd_tilecomp_t* OPJ_RESTRICT tilec, |
| OPJ_UINT32 numres); |
| |
| /** |
| Get the gain of a subband for the irreversible 9-7 DWT. |
| @param orient Number that identifies the subband (0->LL, 1->HL, 2->LH, 3->HH) |
| @return Returns the gain of the 9-7 wavelet transform |
| */ |
| OPJ_UINT32 opj_dwt_getgain_real(OPJ_UINT32 orient); |
| /** |
| Get the norm of a wavelet function of a subband at a specified level for the irreversible 9-7 DWT |
| @param level Level of the wavelet function |
| @param orient Band of the wavelet function |
| @return Returns the norm of the 9-7 wavelet |
| */ |
| OPJ_FLOAT64 opj_dwt_getnorm_real(OPJ_UINT32 level, OPJ_UINT32 orient); |
| /** |
| Explicit calculation of the Quantization Stepsizes |
| @param tccp Tile-component coding parameters |
| @param prec Precint analyzed |
| */ |
| void opj_dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, OPJ_UINT32 prec); |
| /* ----------------------------------------------------------------------- */ |
| /*@}*/ |
| |
| /*@}*/ |
| |
| #endif /* OPJ_DWT_H */ |