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) 2002-2003, Yannick Verschueren
5 * Copyright (c) 2005, Herve Drolon, FreeImage Team
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
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33 @brief The JPEG-2000 file format Reader/Writer (JP2)
37 /** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */
40 #define JP2_JP 0x6a502020 /**< JPEG 2000 signature box */
41 #define JP2_FTYP 0x66747970 /**< File type box */
42 #define JP2_JP2H 0x6a703268 /**< JP2 header box */
43 #define JP2_IHDR 0x69686472 /**< Image header box */
44 #define JP2_COLR 0x636f6c72 /**< Colour specification box */
45 #define JP2_JP2C 0x6a703263 /**< Contiguous codestream box */
46 #define JP2_URL 0x75726c20 /**< URL box */
47 #define JP2_DTBL 0x6474626c /**< Data Reference box */
48 #define JP2_BPCC 0x62706363 /**< Bits per component box */
49 #define JP2_JP2 0x6a703220 /**< File type fields */
50 #define JP2_PCLR 0x70636c72 /**< Palette box */
51 #define JP2_CMAP 0x636d6170 /**< Component Mapping box */
52 #define JP2_CDEF 0x63646566 /**< Channel Definition box */
54 /* ----------------------------------------------------------------------- */
56 Channel description: channel index, type, assocation
58 typedef struct opj_jp2_cdef_info
60 unsigned short cn, typ, asoc;
61 } opj_jp2_cdef_info_t;
64 Channel descriptions and number of descriptions
66 typedef struct opj_jp2_cdef
68 opj_jp2_cdef_info_t *info;
73 Component mappings: channel index, mapping type, palette index
75 typedef struct opj_jp2_cmap_comp
78 unsigned char mtyp, pcol;
79 } opj_jp2_cmap_comp_t;
82 Palette data: table entries, palette columns
84 typedef struct opj_jp2_pclr
86 unsigned int *entries;
87 unsigned char *channel_sign;
88 unsigned char *channel_size;
89 opj_jp2_cmap_comp_t *cmap;
90 unsigned short nr_entries, nr_channels;
94 Collector for ICC profile, palette, component mapping, channel description
96 typedef struct opj_jp2_color
98 unsigned char *icc_profile_buf;
101 opj_jp2_cdef_t *jp2_cdef;
102 opj_jp2_pclr_t *jp2_pclr;
103 unsigned char jp2_has_colr;
109 typedef struct opj_jp2_comps {
116 JPEG-2000 file format reader/writer
118 typedef struct opj_jp2 {
120 opj_common_ptr cinfo;
121 /** handle to the J2K codec */
125 unsigned int numcomps;
133 unsigned int precedence;
135 unsigned int minversion;
138 opj_jp2_comps_t *comps;
139 unsigned int j2k_codestream_offset;
140 unsigned int j2k_codestream_length;
141 opj_bool ignore_pclr_cmap_cdef;
147 typedef struct opj_jp2_box {
153 /** @name Exported functions */
155 /* ----------------------------------------------------------------------- */
157 Write the JP2H box - JP2 Header box (used in MJ2)
158 @param jp2 JP2 handle
159 @param cio Output buffer stream
161 void jp2_write_jp2h(opj_jp2_t *jp2, opj_cio_t *cio);
163 Read the JP2H box - JP2 Header box (used in MJ2)
164 @param jp2 JP2 handle
165 @param cio Input buffer stream
166 @param ext Collector for profile, cdef and pclr data
167 @return Returns true if successful, returns false otherwise
169 opj_bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio, opj_jp2_color_t *color);
171 Creates a JP2 decompression structure
172 @param cinfo Codec context info
173 @return Returns a handle to a JP2 decompressor if successful, returns NULL otherwise
175 opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo);
177 Destroy a JP2 decompressor handle
178 @param jp2 JP2 decompressor handle to destroy
180 void jp2_destroy_decompress(opj_jp2_t *jp2);
182 Setup the decoder decoding parameters using user parameters.
183 Decoding parameters are returned in jp2->j2k->cp.
184 @param jp2 JP2 decompressor handle
185 @param parameters decompression parameters
187 void jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters);
189 Decode an image from a JPEG-2000 file stream
190 @param jp2 JP2 decompressor handle
191 @param cio Input buffer stream
192 @param cstr_info Codestream information structure if required, NULL otherwise
193 @return Returns a decoded image if successful, returns NULL otherwise
195 opj_image_t* opj_jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio, opj_codestream_info_t *cstr_info);
197 Creates a JP2 compression structure
198 @param cinfo Codec context info
199 @return Returns a handle to a JP2 compressor if successful, returns NULL otherwise
201 opj_jp2_t* jp2_create_compress(opj_common_ptr cinfo);
203 Destroy a JP2 compressor handle
204 @param jp2 JP2 compressor handle to destroy
206 void jp2_destroy_compress(opj_jp2_t *jp2);
208 Setup the encoder parameters using the current image and using user parameters.
209 Coding parameters are returned in jp2->j2k->cp.
210 @param jp2 JP2 compressor handle
211 @param parameters compression parameters
212 @param image input filled image
214 void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image);
216 Encode an image into a JPEG-2000 file stream
217 @param jp2 JP2 compressor handle
218 @param cio Output buffer stream
219 @param image Image to encode
220 @param cstr_info Codestream information structure if required, NULL otherwise
221 @return Returns true if successful, returns false otherwise
223 opj_bool opj_jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info);
225 /* ----------------------------------------------------------------------- */