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
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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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.
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35 @brief Implementation of a tier-2 coding (packetization of code-block data) (T2)
39 /** @defgroup T2 T2 - Implementation of a tier-2 coding */
45 typedef struct opj_t2 {
49 /** Encoding: pointer to the src image. Decoding: pointer to the dst image. */
51 /** pointer to the image coding parameters */
58 typedef struct opj_t2_v2 {
62 /** Encoding: pointer to the src image. Decoding: pointer to the dst image. */
64 /** pointer to the image coding parameters */
68 /** @name Exported functions */
70 /* ----------------------------------------------------------------------- */
73 Encode the packets of a tile to a destination buffer
75 @param tileno number of the tile encoded
76 @param tile the tile for which to write the packets
77 @param maxlayers maximum number of layers
78 @param dest the destination buffer
79 @param len the length of the destination buffer
80 @param cstr_info Codestream information structure
81 @param tpnum Tile part number of the current tile
82 @param tppos The position of the tile part flag in the progression order
84 @param t2_mode If == 0 In Threshold calculation ,If == 1 Final pass
85 @param cur_totnum_tp The total number of tile parts in the current tile
87 int t2_encode_packets(opj_t2_t* t2,int tileno, opj_tcd_tile_t *tile, int maxlayers, unsigned char *dest, int len, opj_codestream_info_t *cstr_info,int tpnum, int tppos,int pino,J2K_T2_MODE t2_mode,int cur_totnum_tp);
89 Decode the packets of a tile from a source buffer
91 @param src the source buffer
92 @param len length of the source buffer
93 @param tileno number that identifies the tile for which to decode the packets
94 @param tile tile for which to decode the packets
95 @param cstr_info Codestream information structure
97 int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno, opj_tcd_tile_t *tile, opj_codestream_info_t *cstr_info);
100 Decode the packets of a tile from a source buffer
102 @param src the source buffer
103 @param len length of the source buffer
104 @param tileno number that identifies the tile for which to decode the packets
105 @param tile tile for which to decode the packets
107 opj_bool t2_decode_packets_v2( opj_t2_v2_t *t2,
109 struct opj_tcd_tile_v2 *tile,
110 OPJ_BYTE *src, OPJ_UINT32 * p_data_read,
112 opj_codestream_index_t *cstr_info);
115 * Creates a Tier 2 handle
117 * @param p_image Source or destination image
118 * @param p_cp Image coding parameters.
119 * @return a new T2 handle if successful, NULL otherwise.
121 opj_t2_v2_t* t2_create_v2(opj_image_t *p_image, opj_cp_v2_t *p_cp);
125 @param cinfo Codec context info
126 @param image Source or destination image
127 @param cp Image coding parameters
128 @return Returns a new T2 handle if successful, returns NULL otherwise
130 opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp);
133 @param t2 T2 handle to destroy
135 void t2_destroy(opj_t2_t *t2);
139 @param t2 T2 handle to destroy
141 void t2_destroy_v2(opj_t2_v2_t *t2);
143 /* ----------------------------------------------------------------------- */