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      1 /*
      2  * The copyright in this software is being made available under the 2-clauses
      3  * BSD License, included below. This software may be subject to other third
      4  * party and contributor rights, including patent rights, and no such rights
      5  * are granted under this license.
      6  *
      7  * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
      8  * Copyright (c) 2002-2014, Professor Benoit Macq
      9  * Copyright (c) 2001-2003, David Janssens
     10  * Copyright (c) 2002-2003, Yannick Verschueren
     11  * Copyright (c) 2003-2007, Francois-Olivier Devaux
     12  * Copyright (c) 2003-2014, Antonin Descampe
     13  * Copyright (c) 2005, Herve Drolon, FreeImage Team
     14  * All rights reserved.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
     26  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     29  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #ifndef __PI_H
     39 #define __PI_H
     40 /**
     41 @file pi.h
     42 @brief Implementation of a packet iterator (PI)
     43 
     44 The functions in PI.C have for goal to realize a packet iterator that permits to get the next
     45 packet following the progression order and change of it. The functions in PI.C are used
     46 by some function in T2.C.
     47 */
     48 
     49 /** @defgroup PI PI - Implementation of a packet iterator */
     50 /*@{*/
     51 
     52 /**
     53 FIXME DOC
     54 */
     55 typedef struct opj_pi_resolution {
     56   OPJ_UINT32 pdx, pdy;
     57   OPJ_UINT32 pw, ph;
     58 } opj_pi_resolution_t;
     59 
     60 /**
     61 FIXME DOC
     62 */
     63 typedef struct opj_pi_comp {
     64   OPJ_UINT32 dx, dy;
     65   /** number of resolution levels */
     66   OPJ_UINT32 numresolutions;
     67   opj_pi_resolution_t *resolutions;
     68 } opj_pi_comp_t;
     69 
     70 /**
     71 Packet iterator
     72 */
     73 typedef struct opj_pi_iterator {
     74   /** Enabling Tile part generation*/
     75   OPJ_BYTE tp_on;
     76   /** precise if the packet has been already used (usefull for progression order change) */
     77   OPJ_INT16 *include;
     78   /** layer step used to localize the packet in the include vector */
     79   OPJ_UINT32 step_l;
     80   /** resolution step used to localize the packet in the include vector */
     81   OPJ_UINT32 step_r;
     82   /** component step used to localize the packet in the include vector */
     83   OPJ_UINT32 step_c;
     84   /** precinct step used to localize the packet in the include vector */
     85   OPJ_UINT32 step_p;
     86   /** component that identify the packet */
     87   OPJ_UINT32 compno;
     88   /** resolution that identify the packet */
     89   OPJ_UINT32 resno;
     90   /** precinct that identify the packet */
     91   OPJ_UINT32 precno;
     92   /** layer that identify the packet */
     93   OPJ_UINT32 layno;
     94   /** 0 if the first packet */
     95   OPJ_BOOL first;
     96   /** progression order change information */
     97   opj_poc_t poc;
     98   /** number of components in the image */
     99   OPJ_UINT32 numcomps;
    100   /** Components*/
    101   opj_pi_comp_t *comps;
    102   /** FIXME DOC*/
    103   OPJ_INT32 tx0, ty0, tx1, ty1;
    104   /** FIXME DOC*/
    105   OPJ_INT32 x, y;
    106   /** FIXME DOC*/
    107   OPJ_UINT32 dx, dy;
    108 } opj_pi_iterator_t;
    109 
    110 /** @name Exported functions */
    111 /*@{*/
    112 /* ----------------------------------------------------------------------- */
    113 /**
    114  * Creates a packet iterator for encoding.
    115  *
    116  * @param	image		the image being encoded.
    117  * @param	cp		the coding parameters.
    118  * @param	tileno	index of the tile being encoded.
    119  * @param	t2_mode	the type of pass for generating the packet iterator
    120  *
    121  * @return	a list of packet iterator that points to the first packet of the tile (not true).
    122 */
    123 opj_pi_iterator_t *opj_pi_initialise_encode(const opj_image_t *image,
    124                                             opj_cp_t *cp,
    125                                             OPJ_UINT32 tileno,
    126                                             J2K_T2_MODE t2_mode);
    127 
    128 /**
    129  * Updates the encoding parameters of the codec.
    130  *
    131  * @param	p_image		the image being encoded.
    132  * @param	p_cp		the coding parameters.
    133  * @param	p_tile_no	index of the tile being encoded.
    134 */
    135 void opj_pi_update_encoding_parameters(	const opj_image_t *p_image,
    136                                         opj_cp_t *p_cp,
    137                                         OPJ_UINT32 p_tile_no );
    138 
    139 /**
    140 Modify the packet iterator for enabling tile part generation
    141 @param pi Handle to the packet iterator generated in pi_initialise_encode
    142 @param cp Coding parameters
    143 @param tileno Number that identifies the tile for which to list the packets
    144 @param pino   FIXME DOC
    145 @param tpnum Tile part number of the current tile
    146 @param tppos The position of the tile part flag in the progression order
    147 @param t2_mode FIXME DOC
    148 */
    149 void opj_pi_create_encode(  opj_pi_iterator_t *pi,
    150                             opj_cp_t *cp,
    151                             OPJ_UINT32 tileno,
    152                             OPJ_UINT32 pino,
    153                             OPJ_UINT32 tpnum,
    154                             OPJ_INT32 tppos,
    155                             J2K_T2_MODE t2_mode);
    156 
    157 /**
    158 Create a packet iterator for Decoder
    159 @param image Raw image for which the packets will be listed
    160 @param cp Coding parameters
    161 @param tileno Number that identifies the tile for which to list the packets
    162 @return Returns a packet iterator that points to the first packet of the tile
    163 @see opj_pi_destroy
    164 */
    165 opj_pi_iterator_t *opj_pi_create_decode(opj_image_t * image,
    166                                         opj_cp_t * cp,
    167                                         OPJ_UINT32 tileno);
    168 /**
    169  * Destroys a packet iterator array.
    170  *
    171  * @param	p_pi			the packet iterator array to destroy.
    172  * @param	p_nb_elements	the number of elements in the array.
    173  */
    174 void opj_pi_destroy(opj_pi_iterator_t *p_pi,
    175                     OPJ_UINT32 p_nb_elements);
    176 
    177 /**
    178 Modify the packet iterator to point to the next packet
    179 @param pi Packet iterator to modify
    180 @return Returns false if pi pointed to the last packet or else returns true
    181 */
    182 OPJ_BOOL opj_pi_next(opj_pi_iterator_t * pi);
    183 /* ----------------------------------------------------------------------- */
    184 /*@}*/
    185 
    186 /*@}*/
    187 
    188 #endif /* __PI_H */
    189