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  1. /*
  2.  * Copyright (c) 2001-2002, David Janssens
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  * 1. Redistributions of source code must retain the above copyright
  9.  *    notice, this list of conditions and the following disclaimer.
  10.  * 2. Redistributions in binary form must reproduce the above copyright
  11.  *    notice, this list of conditions and the following disclaimer in the
  12.  *    documentation and/or other materials provided with the distribution.
  13.  *
  14.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
  15.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  18.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  19.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  20.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  21.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  22.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  23.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  24.  * POSSIBILITY OF SUCH DAMAGE.
  25.  */
  26.  
  27. #ifndef __PI_H
  28. #define __PI_H
  29.  
  30. #include "j2k.h"
  31. #include "tcd.h"
  32.  
  33. typedef struct {
  34.         int pdx, pdy;
  35.         int pw, ph;
  36. } pi_resolution_t;
  37.  
  38. typedef struct {
  39.         int dx, dy;
  40.         int numresolutions;
  41.         pi_resolution_t *resolutions;
  42. } pi_comp_t;
  43.  
  44. typedef struct {
  45.         short int *include;
  46.   int step_l, step_r, step_c, step_p;
  47.         int compno, resno, precno, layno;       /* component, resolution, precinct and layer that indentify the packet */
  48.         int first;
  49.         j2k_poc_t poc;
  50.         int numcomps;
  51.         pi_comp_t *comps;
  52.         int tx0, ty0, tx1, ty1;
  53.         int x, y, dx, dy;
  54. } pi_iterator_t;                                                                /* packet iterator */
  55.  
  56. /*
  57.  * Create a packet iterator
  58.  * img: raw image for which the packets will be listed
  59.  * cp: coding paremeters
  60.  * tileno: number that identifies the tile for which to list the packets
  61.  * return value: returns a packet iterator that points to the first packet of the tile
  62.  */
  63. pi_iterator_t *pi_create(j2k_image_t * img, j2k_cp_t * cp, int tileno);
  64.  
  65. /*
  66.  * Modify the packet iterator to point to the next packet
  67.  * pi: packet iterator to modify
  68.  * return value: returns 0 if pi pointed to the last packet or else returns 1
  69.  */
  70. int pi_next(pi_iterator_t * pi);
  71.  
  72. #endif
  73.