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  1. /*
  2.  * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
  3.  * Copyright (c) 2002-2007, Professor Benoit Macq
  4.  * Copyright (c) 2001-2003, David Janssens
  5.  * Copyright (c) 2002-2003, Yannick Verschueren
  6.  * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe
  7.  * Copyright (c) 2005, Herve Drolon, FreeImage Team
  8.  * All rights reserved.
  9.  *
  10.  * Redistribution and use in source and binary forms, with or without
  11.  * modification, are permitted provided that the following conditions
  12.  * are met:
  13.  * 1. Redistributions of source code must retain the above copyright
  14.  *    notice, this list of conditions and the following disclaimer.
  15.  * 2. Redistributions in binary form must reproduce the above copyright
  16.  *    notice, this list of conditions and the following disclaimer in the
  17.  *    documentation and/or other materials provided with the distribution.
  18.  *
  19.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  20.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29.  * POSSIBILITY OF SUCH DAMAGE.
  30.  */
  31. #ifndef __T1_H
  32. #define __T1_H
  33. /**
  34. @file t1.h
  35. @brief Implementation of the tier-1 coding (coding of code-block coefficients) (T1)
  36.  
  37. The functions in T1.C have for goal to realize the tier-1 coding operation. The functions
  38. in T1.C are used by some function in TCD.C.
  39. */
  40.  
  41. /** @defgroup T1 T1 - Implementation of the tier-1 coding */
  42. /*@{*/
  43.  
  44. /* ----------------------------------------------------------------------- */
  45. #define T1_NMSEDEC_BITS 7
  46.  
  47. #define T1_SIG_NE 0x0001        /**< Context orientation : North-East direction */
  48. #define T1_SIG_SE 0x0002        /**< Context orientation : South-East direction */
  49. #define T1_SIG_SW 0x0004        /**< Context orientation : South-West direction */
  50. #define T1_SIG_NW 0x0008        /**< Context orientation : North-West direction */
  51. #define T1_SIG_N 0x0010         /**< Context orientation : North direction */
  52. #define T1_SIG_E 0x0020         /**< Context orientation : East direction */
  53. #define T1_SIG_S 0x0040         /**< Context orientation : South direction */
  54. #define T1_SIG_W 0x0080         /**< Context orientation : West direction */
  55. #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)
  56. #define T1_SIG_PRIM (T1_SIG_N|T1_SIG_E|T1_SIG_S|T1_SIG_W)
  57.  
  58. #define T1_SGN_N 0x0100
  59. #define T1_SGN_E 0x0200
  60. #define T1_SGN_S 0x0400
  61. #define T1_SGN_W 0x0800
  62. #define T1_SGN (T1_SGN_N|T1_SGN_E|T1_SGN_S|T1_SGN_W)
  63.  
  64. #define T1_SIG 0x1000
  65. #define T1_REFINE 0x2000
  66. #define T1_VISIT 0x4000
  67.  
  68. #define T1_NUMCTXS_ZC 9
  69. #define T1_NUMCTXS_SC 5
  70. #define T1_NUMCTXS_MAG 3
  71. #define T1_NUMCTXS_AGG 1
  72. #define T1_NUMCTXS_UNI 1
  73.  
  74. #define T1_CTXNO_ZC 0
  75. #define T1_CTXNO_SC (T1_CTXNO_ZC+T1_NUMCTXS_ZC)
  76. #define T1_CTXNO_MAG (T1_CTXNO_SC+T1_NUMCTXS_SC)
  77. #define T1_CTXNO_AGG (T1_CTXNO_MAG+T1_NUMCTXS_MAG)
  78. #define T1_CTXNO_UNI (T1_CTXNO_AGG+T1_NUMCTXS_AGG)
  79. #define T1_NUMCTXS (T1_CTXNO_UNI+T1_NUMCTXS_UNI)
  80.  
  81. #define T1_NMSEDEC_FRACBITS (T1_NMSEDEC_BITS-1)
  82.  
  83. #define T1_TYPE_MQ 0    /**< Normal coding using entropy coder */
  84. #define T1_TYPE_RAW 1   /**< No encoding the information is store under raw format in codestream (mode switch RAW)*/
  85.  
  86. /* ----------------------------------------------------------------------- */
  87.  
  88. typedef short flag_t;
  89.  
  90. /**
  91. Tier-1 coding (coding of code-block coefficients)
  92. */
  93. typedef struct opj_t1 {
  94.         /** codec context */
  95.         opj_common_ptr cinfo;
  96.  
  97.         /** MQC component */
  98.         opj_mqc_t *mqc;
  99.         /** RAW component */
  100.         opj_raw_t *raw;
  101.  
  102.         int *data;
  103.         flag_t *flags;
  104.         int w;
  105.         int h;
  106.         int datasize;
  107.         int flagssize;
  108.         int flags_stride;
  109. } opj_t1_t;
  110.  
  111. #define MACRO_t1_flags(x,y) t1->flags[((x)*(t1->flags_stride))+(y)]
  112.  
  113. /** @name Exported functions */
  114. /*@{*/
  115. /* ----------------------------------------------------------------------- */
  116. /**
  117. Create a new T1 handle
  118. and initialize the look-up tables of the Tier-1 coder/decoder
  119. @return Returns a new T1 handle if successful, returns NULL otherwise
  120. @see t1_init_luts
  121. */
  122. opj_t1_t* t1_create(opj_common_ptr cinfo);
  123. /**
  124. Destroy a previously created T1 handle
  125. @param t1 T1 handle to destroy
  126. */
  127. void t1_destroy(opj_t1_t *t1);
  128. /**
  129. Encode the code-blocks of a tile
  130. @param t1 T1 handle
  131. @param tile The tile to encode
  132. @param tcp Tile coding parameters
  133. */
  134. void t1_encode_cblks(opj_t1_t *t1, opj_tcd_tile_t *tile, opj_tcp_t *tcp);
  135. /**
  136. Decode the code-blocks of a tile
  137. @param t1 T1 handle
  138. @param tilec The tile to decode
  139. @param tccp Tile coding parameters
  140. */
  141. void t1_decode_cblks(opj_t1_t* t1, opj_tcd_tilecomp_t* tilec, opj_tccp_t* tccp);
  142. /* ----------------------------------------------------------------------- */
  143. /*@}*/
  144.  
  145. /*@}*/
  146.  
  147. #endif /* __T1_H */
  148.