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| 4680 | right-hear | 1 | /* |
| 2 | * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium |
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| 3 | * Copyright (c) 2002-2007, Professor Benoit Macq |
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| 4 | * Copyright (c) 2001-2003, David Janssens |
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| 5 | * Copyright (c) 2002-2003, Yannick Verschueren |
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| 6 | * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe |
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| 7 | * Copyright (c) 2005, Herve Drolon, FreeImage Team |
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| 8 | * All rights reserved. |
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| 9 | * |
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| 10 | * Redistribution and use in source and binary forms, with or without |
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| 11 | * modification, are permitted provided that the following conditions |
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| 12 | * are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright |
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| 14 | * notice, this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 16 | * notice, this list of conditions and the following disclaimer in the |
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| 17 | * documentation and/or other materials provided with the distribution. |
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| 18 | * |
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' |
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| 20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 29 | * POSSIBILITY OF SUCH DAMAGE. |
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| 30 | */ |
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| 31 | |||
| 32 | #ifndef __DWT_H |
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| 33 | #define __DWT_H |
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| 34 | /** |
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| 35 | @file dwt.h |
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| 36 | @brief Implementation of a discrete wavelet transform (DWT) |
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| 37 | |||
| 38 | The functions in DWT.C have for goal to realize forward and inverse discret wavelet |
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| 39 | transform with filter 5-3 (reversible) and filter 9-7 (irreversible). The functions in |
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| 40 | DWT.C are used by some function in TCD.C. |
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| 41 | */ |
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| 42 | |||
| 43 | /** @defgroup DWT DWT - Implementation of a discrete wavelet transform */ |
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| 44 | /*@{*/ |
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| 45 | |||
| 46 | |||
| 47 | /** @name Exported functions */ |
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| 48 | /*@{*/ |
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| 49 | /* ----------------------------------------------------------------------- */ |
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| 50 | /** |
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| 51 | Forward 5-3 wavelet tranform in 2-D. |
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| 52 | Apply a reversible DWT transform to a component of an image. |
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| 53 | @param tilec Tile component information (current tile) |
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| 54 | */ |
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| 55 | void dwt_encode(opj_tcd_tilecomp_t * tilec); |
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| 56 | /** |
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| 57 | Inverse 5-3 wavelet tranform in 2-D. |
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| 58 | Apply a reversible inverse DWT transform to a component of an image. |
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| 59 | @param tilec Tile component information (current tile) |
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| 60 | @param numres Number of resolution levels to decode |
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| 61 | */ |
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| 62 | void dwt_decode(opj_tcd_tilecomp_t* tilec, int numres); |
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| 63 | /** |
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| 64 | Get the gain of a subband for the reversible 5-3 DWT. |
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| 65 | @param orient Number that identifies the subband (0->LL, 1->HL, 2->LH, 3->HH) |
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| 66 | @return Returns 0 if orient = 0, returns 1 if orient = 1 or 2, returns 2 otherwise |
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| 67 | */ |
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| 68 | int dwt_getgain(int orient); |
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| 69 | /** |
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| 70 | Get the norm of a wavelet function of a subband at a specified level for the reversible 5-3 DWT. |
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| 71 | @param level Level of the wavelet function |
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| 72 | @param orient Band of the wavelet function |
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| 73 | @return Returns the norm of the wavelet function |
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| 74 | */ |
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| 75 | double dwt_getnorm(int level, int orient); |
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| 76 | /** |
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| 77 | Forward 9-7 wavelet transform in 2-D. |
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| 78 | Apply an irreversible DWT transform to a component of an image. |
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| 79 | @param tilec Tile component information (current tile) |
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| 80 | */ |
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| 81 | void dwt_encode_real(opj_tcd_tilecomp_t * tilec); |
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| 82 | /** |
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| 83 | Inverse 9-7 wavelet transform in 2-D. |
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| 84 | Apply an irreversible inverse DWT transform to a component of an image. |
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| 85 | @param tilec Tile component information (current tile) |
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| 86 | @param numres Number of resolution levels to decode |
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| 87 | */ |
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| 88 | void dwt_decode_real(opj_tcd_tilecomp_t* tilec, int numres); |
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| 89 | /** |
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| 90 | Get the gain of a subband for the irreversible 9-7 DWT. |
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| 91 | @param orient Number that identifies the subband (0->LL, 1->HL, 2->LH, 3->HH) |
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| 92 | @return Returns the gain of the 9-7 wavelet transform |
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| 93 | */ |
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| 94 | int dwt_getgain_real(int orient); |
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| 95 | /** |
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| 96 | Get the norm of a wavelet function of a subband at a specified level for the irreversible 9-7 DWT |
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| 97 | @param level Level of the wavelet function |
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| 98 | @param orient Band of the wavelet function |
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| 99 | @return Returns the norm of the 9-7 wavelet |
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| 100 | */ |
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| 101 | double dwt_getnorm_real(int level, int orient); |
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| 102 | /** |
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| 103 | Explicit calculation of the Quantization Stepsizes |
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| 104 | @param tccp Tile-component coding parameters |
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| 105 | @param prec Precint analyzed |
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| 106 | */ |
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| 107 | void dwt_calc_explicit_stepsizes(opj_tccp_t * tccp, int prec); |
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| 108 | /* ----------------------------------------------------------------------- */ |
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| 109 | /*@}*/ |
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| 110 | |||
| 111 | /*@}*/ |
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| 112 | |||
| 113 | #endif /* __DWT_H */ |