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8 * Copyright (c) 2002-2014, Professor Benoit Macq
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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
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41 @brief Implementation of a tier-2 coding (packetization of code-block data) (T2)
45 /** @defgroup T2 T2 - Implementation of a tier-2 coding */
51 typedef struct opj_t2 {
55 /** Encoding: pointer to the src image. Decoding: pointer to the dst image. */
57 /** pointer to the image coding parameters */
61 /** @name Exported functions */
63 /* ----------------------------------------------------------------------- */
66 Encode the packets of a tile to a destination buffer
68 @param tileno number of the tile encoded
69 @param tile the tile for which to write the packets
70 @param maxlayers maximum number of layers
71 @param dest the destination buffer
72 @param len the length of the destination buffer
73 @param cstr_info Codestream information structure
74 @param tpnum Tile part number of the current tile
75 @param tppos The position of the tile part flag in the progression order
77 @param t2_mode If == 0 In Threshold calculation ,If == 1 Final pass
78 @param cur_totnum_tp The total number of tile parts in the current tile
80 int t2_encode_packets(opj_t2_t* t2, int tileno, opj_tcd_tile_t *tile,
81 int maxlayers, unsigned char *dest, int len, opj_codestream_info_t *cstr_info,
82 int tpnum, int tppos, int pino, J2K_T2_MODE t2_mode, int cur_totnum_tp);
84 Decode the packets of a tile from a source buffer
86 @param src the source buffer
87 @param len length of the source buffer
88 @param tileno number that identifies the tile for which to decode the packets
89 @param tile tile for which to decode the packets
90 @param cstr_info Codestream information structure
92 int t2_decode_packets(opj_t2_t *t2, unsigned char *src, int len, int tileno,
93 opj_tcd_tile_t *tile, opj_codestream_info_t *cstr_info);
97 @param cinfo Codec context info
98 @param image Source or destination image
99 @param cp Image coding parameters
100 @return Returns a new T2 handle if successful, returns NULL otherwise
102 opj_t2_t* t2_create(opj_common_ptr cinfo, opj_image_t *image, opj_cp_t *cp);
105 @param t2 T2 handle to destroy
107 void t2_destroy(opj_t2_t *t2);
109 /* ----------------------------------------------------------------------- */