2 * Copyright (c) 2001-2003, David Janssens
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3 * Copyright (c) 2002-2003, Yannick Verschueren
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4 * Copyright (c) 2003-2005, Francois Devaux and Antonin Descampe
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5 * Copyright (c) 2005, Hervé Drolon, FreeImage Team
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6 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
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7 * All rights reserved.
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9 * Redistribution and use in source and binary forms, with or without
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10 * modification, are permitted provided that the following conditions
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12 * 1. Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 * 2. Redistributions in binary form must reproduce the above copyright
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15 * notice, this list of conditions and the following disclaimer in the
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16 * documentation and/or other materials provided with the distribution.
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18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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28 * POSSIBILITY OF SUCH DAMAGE.
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34 @brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
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36 The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
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37 in T1.C are used by some function in TCD.C.
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40 /** @defgroup T1 T1 - Implementation of the tier-1 coding */
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43 /* ----------------------------------------------------------------------- */
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44 #define T1_NMSEDEC_BITS 7
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46 #define T1_MAXCBLKW 1024 /**< Maximum size of code-block (width) */
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47 #define T1_MAXCBLKH 1024 /**< Maximum size of code-block (heigth) */
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49 #define T1_SIG_NE 0x0001 /**< Context orientation : North-East direction */
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50 #define T1_SIG_SE 0x0002 /**< Context orientation : South-East direction */
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51 #define T1_SIG_SW 0x0004 /**< Context orientation : South-West direction */
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52 #define T1_SIG_NW 0x0008 /**< Context orientation : North-West direction */
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53 #define T1_SIG_N 0x0010 /**< Context orientation : North direction */
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54 #define T1_SIG_E 0x0020 /**< Context orientation : East direction */
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55 #define T1_SIG_S 0x0040 /**< Context orientation : South direction */
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56 #define T1_SIG_W 0x0080 /**< Context orientation : West direction */
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57 #define T1_SIG_OTH (T1_SIG_N|T1_SIG_NE|T1_SIG_E|T1_SIG_SE|T1_SIG_S|T1_SIG_SW|T1_SIG_W|T1_SIG_NW)
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58 #define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
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60 #define T1_SGN_N 0x0100
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61 #define T1_SGN_E 0x0200
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62 #define T1_SGN_S 0x0400
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63 #define T1_SGN_W 0x0800
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64 #define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
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66 #define T1_SIG 0x1000
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67 #define T1_REFINE 0x2000
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68 #define T1_VISIT 0x4000
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70 #define T1_NUMCTXS_AGG 1
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71 #define T1_NUMCTXS_ZC 9
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72 #define T1_NUMCTXS_MAG 3
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73 #define T1_NUMCTXS_SC 5
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74 #define T1_NUMCTXS_UNI 1
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76 #define T1_CTXNO_AGG 0
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77 #define T1_CTXNO_ZC (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
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78 #define T1_CTXNO_MAG (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
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79 #define T1_CTXNO_SC (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
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80 #define T1_CTXNO_UNI (T1_CTXNO_SC+T1_NUMCTXS_SC)
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81 #define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
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83 #define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
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85 #define T1_TYPE_MQ 0 /**< Normal coding using entropy coder */
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86 #define T1_TYPE_RAW 1 /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
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88 /* ----------------------------------------------------------------------- */
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91 Tier-1 coding (coding of code-block coefficients)
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93 typedef struct opj_t1 {
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94 /** codec context */
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95 opj_common_ptr cinfo;
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97 /** MQC component */
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99 /** RAW component */
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102 int lut_ctxno_zc[1024];
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103 int lut_ctxno_sc[256];
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104 int lut_ctxno_mag[4096];
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106 int lut_nmsedec_sig[1 << T1_NMSEDEC_BITS];
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107 int lut_nmsedec_sig0[1 << T1_NMSEDEC_BITS];
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108 int lut_nmsedec_ref[1 << T1_NMSEDEC_BITS];
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109 int lut_nmsedec_ref0[1 << T1_NMSEDEC_BITS];
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111 int data[T1_MAXCBLKH][T1_MAXCBLKW];
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112 int flags[T1_MAXCBLKH + 2][T1_MAXCBLKH + 2];
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116 /** @name Exported functions */
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118 /* ----------------------------------------------------------------------- */
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120 Create a new T1 handle
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121 and initialize the look-up tables of the Tier-1 coder/decoder
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122 @return Returns a new T1 handle if successful, returns NULL otherwise
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125 opj_t1_t* t1_create(opj_common_ptr cinfo);
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127 Destroy a previously created T1 handle
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128 @param t1 T1 handle to destroy
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130 void t1_destroy(opj_t1_t *t1);
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132 Encode the code-blocks of a tile
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133 @param t1 T1 handle
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134 @param tile The tile to encode
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135 @param tcp Tile coding parameters
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137 void t1_encode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
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139 Decode the code-blocks of a tile
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140 @param t1 T1 handle
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141 @param tile The tile to decode
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142 @param tcp Tile coding parameters
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144 void t1_decode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
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145 /* ----------------------------------------------------------------------- */
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150 #endif /* __T1_H */
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