2 * Copyright (c) 2004, Yannick Verschueren
3 * Copyright (c) 2005, Herv� Drolon, FreeImage Team
4 * Copyright (c) 2002-2005, Communications and remote sensing Laboratory, Universite catholique de Louvain, Belgium
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32 @brief The JPEG-2000 file format Reader/Writer (JP2)
36 /** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */
39 #define JPIP_JPIP 0x6a706970
41 #define JP2_JP 0x6a502020 /**< JPEG 2000 signature box */
42 #define JP2_FTYP 0x66747970 /**< File type box */
43 #define JP2_JP2H 0x6a703268 /**< JP2 header box */
44 #define JP2_IHDR 0x69686472 /**< Image header box */
45 #define JP2_COLR 0x636f6c72 /**< Colour specification box */
46 #define JP2_JP2C 0x6a703263 /**< Contiguous codestream box */
47 #define JP2_URL 0x75726c20 /**< URL box */
48 #define JP2_DBTL 0x6474626c /**< ??? */
49 #define JP2_BPCC 0x62706363 /**< Bits per component box */
50 #define JP2_JP2 0x6a703220 /**< File type fields */
52 /* ----------------------------------------------------------------------- */
57 typedef struct opj_jp2_comps {
64 JPEG-2000 file format reader/writer
66 typedef struct opj_jp2 {
69 /** handle to the J2K codec */
73 unsigned int numcomps;
81 unsigned int precedence;
83 unsigned int minversion;
86 opj_jp2_comps_t *comps;
88 unsigned int j2k_codestream_offset;
89 unsigned int j2k_codestream_length;
95 typedef struct opj_jp2_box {
101 /** @name Local static functions */
103 /* ----------------------------------------------------------------------- */
106 @param cinfo Codec context info
107 @param cio Input stream
109 @return Returns true if successful, returns false otherwise
111 static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box);
112 static void jp2_write_url(opj_cio_t *cio, char *Idx_file);
114 Read the IHDR box - Image Header box
115 @param jp2 JP2 handle
116 @param cio Input buffer stream
117 @return Returns true if successful, returns false otherwise
119 static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio);
120 static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio);
121 static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio);
122 static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio);
123 static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio);
124 static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio);
126 Write the JP2H box - JP2 Header box
127 @param jp2 JP2 handle
128 @param cio Output buffer stream
130 static void jp2_write_jp2h(opj_jp2_t *jp2, opj_cio_t *cio);
132 Read the JP2H box - JP2 Header box
133 @param jp2 JP2 handle
134 @param cio Input buffer stream
135 @return Returns true if successful, returns false otherwise
137 static bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio);
139 Write the FTYP box - File type box
140 @param jp2 JP2 handle
141 @param cio Output buffer stream
143 static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio);
145 Read the FTYP box - File type box
146 @param jp2 JP2 handle
147 @param cio Input buffer stream
148 @return Returns true if successful, returns false otherwise
150 static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio);
151 static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, char *index);
152 static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset);
153 static void jp2_write_jp(opj_cio_t *cio);
155 Read the JP box - JPEG 2000 signature
156 @param jp2 JP2 handle
157 @param cio Input buffer stream
158 @return Returns true if successful, returns false otherwise
160 static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio);
162 Decode the structure of a JP2 file
163 @param jp2 JP2 handle
164 @param cio Input buffer stream
165 @return Returns true if successful, returns false otherwise
167 static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio);
168 /* ----------------------------------------------------------------------- */
171 /** @name Exported functions */
173 /* ----------------------------------------------------------------------- */
175 Creates a JP2 decompression structure
176 @param cinfo Codec context info
177 @return Returns a handle to a JP2 decompressor if successful, returns NULL otherwise
179 opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo);
181 Destroy a JP2 decompressor handle
182 @param jp2 JP2 decompressor handle to destroy
184 void jp2_destroy_decompress(opj_jp2_t *jp2);
186 Setup the decoder decoding parameters using user parameters.
187 Decoding parameters are returned in jp2->j2k->cp.
188 @param jp2 JP2 decompressor handle
189 @param parameters decompression parameters
191 void jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters);
193 Decode an image from a JPEG-2000 file stream
194 @param jp2 JP2 decompressor handle
195 @param cio Input buffer stream
196 @return Returns a decoded image if successful, returns NULL otherwise
198 opj_image_t* jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio);
200 Creates a JP2 compression structure
201 @param cinfo Codec context info
202 @return Returns a handle to a JP2 compressor if successful, returns NULL otherwise
204 opj_jp2_t* jp2_create_compress(opj_common_ptr cinfo);
206 Destroy a JP2 compressor handle
207 @param jp2 JP2 compressor handle to destroy
209 void jp2_destroy_compress(opj_jp2_t *jp2);
211 Setup the encoder parameters using the current image and using user parameters.
212 Coding parameters are returned in jp2->j2k->cp.
213 @param jp2 JP2 compressor handle
214 @param parameters compression parameters
215 @param image input filled image
217 void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image);
219 Encode an image into a JPEG-2000 file stream
220 @param jp2 JP2 compressor handle
221 @param cio Output buffer stream
222 @param image Image to encode
223 @param index Name of the index file if required, NULL otherwise
224 @return Returns true if successful, returns false otherwise
226 bool jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, char *index);
227 /* ----------------------------------------------------------------------- */