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
8 * Copyright (c) 2006-2007, Parvatha Elangovan
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
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18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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23 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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36 @brief The JPEG-2000 Codestream Reader/Writer (J2K)
38 The functions in J2K.C have for goal to read/write the several parts of the codestream: markers and data.
41 /** @defgroup J2K J2K - JPEG-2000 codestream reader/writer */
44 #define J2K_CP_CSTY_PRT 0x01
45 #define J2K_CP_CSTY_SOP 0x02
46 #define J2K_CP_CSTY_EPH 0x04
47 #define J2K_CCP_CSTY_PRT 0x01
48 #define J2K_CCP_CBLKSTY_LAZY 0x01 /**< Selective arithmetic coding bypass */
49 #define J2K_CCP_CBLKSTY_RESET 0x02 /**< Reset context probabilities on coding pass boundaries */
50 #define J2K_CCP_CBLKSTY_TERMALL 0x04 /**< Termination on each coding pass */
51 #define J2K_CCP_CBLKSTY_VSC 0x08 /**< Vertically stripe causal context */
52 #define J2K_CCP_CBLKSTY_PTERM 0x10 /**< Predictable termination */
53 #define J2K_CCP_CBLKSTY_SEGSYM 0x20 /**< Segmentation symbols are used */
54 #define J2K_CCP_QNTSTY_NOQNT 0
55 #define J2K_CCP_QNTSTY_SIQNT 1
56 #define J2K_CCP_QNTSTY_SEQNT 2
58 /* ----------------------------------------------------------------------- */
60 #define J2K_MS_SOC 0xff4f /**< SOC marker value */
61 #define J2K_MS_SOT 0xff90 /**< SOT marker value */
62 #define J2K_MS_SOD 0xff93 /**< SOD marker value */
63 #define J2K_MS_EOC 0xffd9 /**< EOC marker value */
64 #define J2K_MS_SIZ 0xff51 /**< SIZ marker value */
65 #define J2K_MS_COD 0xff52 /**< COD marker value */
66 #define J2K_MS_COC 0xff53 /**< COC marker value */
67 #define J2K_MS_RGN 0xff5e /**< RGN marker value */
68 #define J2K_MS_QCD 0xff5c /**< QCD marker value */
69 #define J2K_MS_QCC 0xff5d /**< QCC marker value */
70 #define J2K_MS_POC 0xff5f /**< POC marker value */
71 #define J2K_MS_TLM 0xff55 /**< TLM marker value */
72 #define J2K_MS_PLM 0xff57 /**< PLM marker value */
73 #define J2K_MS_PLT 0xff58 /**< PLT marker value */
74 #define J2K_MS_PPM 0xff60 /**< PPM marker value */
75 #define J2K_MS_PPT 0xff61 /**< PPT marker value */
76 #define J2K_MS_SOP 0xff91 /**< SOP marker value */
77 #define J2K_MS_EPH 0xff92 /**< EPH marker value */
78 #define J2K_MS_CRG 0xff63 /**< CRG marker value */
79 #define J2K_MS_COM 0xff64 /**< COM marker value */
81 #define J2K_MS_UNK 0 /**< UNKNOWN marker value */
84 #define J2K_MS_CBD 0xff78 /**< CBD marker value */
85 #define J2K_MS_MCC 0xff75 /**< MCC marker value */
86 #define J2K_MS_MCT 0xff74 /**< MCT marker value */
87 #define J2K_MS_MCO 0xff77 /**< MCO marker value */
92 #define J2K_MS_EPC 0xff68 /**< EPC marker value (Part 11: JPEG 2000 for Wireless) */
93 #define J2K_MS_EPB 0xff66 /**< EPB marker value (Part 11: JPEG 2000 for Wireless) */
94 #define J2K_MS_ESD 0xff67 /**< ESD marker value (Part 11: JPEG 2000 for Wireless) */
95 #define J2K_MS_RED 0xff69 /**< RED marker value (Part 11: JPEG 2000 for Wireless) */
98 #define J2K_MS_SEC 0xff65 /**< SEC marker value (Part 8: Secure JPEG 2000) */
99 #define J2K_MS_INSEC 0xff94 /**< INSEC marker value (Part 8: Secure JPEG 2000) */
100 #endif /* USE_JPSEC */
104 struct opj_stream_private;
106 /* ----------------------------------------------------------------------- */
109 Values that specify the status of the decoding process when decoding the main header.
110 These values may be combined with a | operator.
112 typedef enum J2K_STATUS {
113 J2K_STATE_MHSOC = 0x0001, /**< a SOC marker is expected */
114 J2K_STATE_MHSIZ = 0x0002, /**< a SIZ marker is expected */
115 J2K_STATE_MH = 0x0004, /**< the decoding process is in the main header */
116 J2K_STATE_TPHSOT = 0x0008, /**< the decoding process is in a tile part header and expects a SOT marker */
117 J2K_STATE_TPH = 0x0010, /**< the decoding process is in a tile part header */
118 J2K_STATE_MT = 0x0020, /**< the EOC marker has just been read */
119 J2K_STATE_NEOC = 0x0040, /**< the decoding process must not expect a EOC marker because the codestream is truncated */
120 J2K_STATE_ERR = 0x0080 /**< the decoding process has encountered an error */
123 /* ----------------------------------------------------------------------- */
128 typedef enum T2_MODE {
129 THRESH_CALC = 0, /** Function called in Rate allocation process*/
130 FINAL_PASS = 1 /** Function called in Tier 2 process*/
134 Quantization stepsize
136 typedef struct opj_stepsize {
144 //Tile-component coding parameters
146 //typedef struct opj_tccp {
147 // /** coding style */
149 // /** number of resolutions */
150 // int numresolutions;
151 // /** code-blocks width */
153 // /** code-blocks height */
155 // /** code-block coding style */
157 // /** discrete wavelet transform identifier */
159 // /** quantisation style */
161 // /** stepsizes used for quantization */
162 // opj_stepsize_t stepsizes[J2K_MAXBANDS];
163 // /** number of guard bits */
165 // /** Region Of Interest shift */
167 // /** precinct width */
168 // int prcw[J2K_MAXRLVLS];
169 // /** precinct height */
170 // int prch[J2K_MAXRLVLS];
174 Tile-component coding parameters
176 typedef struct opj_tccp
180 /** number of resolutions */
181 OPJ_UINT32 numresolutions;
182 /** code-blocks width */
184 /** code-blocks height */
186 /** code-block coding style */
188 /** discrete wavelet transform identifier */
190 /** quantisation style */
192 /** stepsizes used for quantization */
193 opj_stepsize_t stepsizes[J2K_MAXBANDS];
194 /** number of guard bits */
196 /** Region Of Interest shift */
198 /** precinct width */
199 OPJ_UINT32 prcw[J2K_MAXRLVLS];
200 /** precinct height */
201 OPJ_UINT32 prch[J2K_MAXRLVLS];
202 /** the dc_level_shift **/
203 OPJ_INT32 m_dc_level_shift;
209 Tile coding parameters :
210 this structure is used to store coding/decoding parameters common to all
211 tiles (information like COD, COC in main header)
213 typedef struct opj_tcp {
214 /** 1 : first part-tile of a tile */
218 /** progression order */
220 /** number of layers */
222 /** multi-component transform identifier */
224 /** rates of layers */
226 /** number of progression order changes */
228 /** indicates if a POC marker has been used O:NO, 1:YES */
230 /** progression order changes */
232 /** packet header store there for futur use in t2_decode_packet */
233 unsigned char *ppt_data;
234 /** pointer remaining on the first byte of the first header if ppt is used */
235 unsigned char *ppt_data_first;
236 /** If ppt == 1 --> there was a PPT marker for the present tile */
238 /** used in case of multiple marker PPT (number of info already stored) */
242 /** add fixed_quality */
243 float distoratio[100];
244 /** tile-component coding parameters */
250 * Type of data for storing the MCT data
252 typedef enum MCT_ELEMENT_TYPE
254 MCT_TYPE_INT16 = 0, /** MCT data is stored as signed shorts*/
255 MCT_TYPE_INT32 = 1, /** MCT data is stored as signed integers*/
256 MCT_TYPE_FLOAT = 2, /** MCT data is stored as floats*/
257 MCT_TYPE_DOUBLE = 3 /** MCT data is stored as doubles*/
258 } J2K_MCT_ELEMENT_TYPE;
261 * Type of data for storing the MCT data
263 typedef enum MCT_ARRAY_TYPE
265 MCT_TYPE_DEPENDENCY = 0,
266 MCT_TYPE_DECORRELATION = 1,
268 } J2K_MCT_ARRAY_TYPE;
270 typedef struct opj_mct_data
272 J2K_MCT_ELEMENT_TYPE m_element_type;
273 J2K_MCT_ARRAY_TYPE m_array_type;
276 OPJ_UINT32 m_data_size;
280 typedef struct opj_simple_mcc_decorrelation_data
283 OPJ_UINT32 m_nb_comps;
284 opj_mct_data_t * m_decorrelation_array;
285 opj_mct_data_t * m_offset_array;
286 OPJ_UINT32 m_is_irreversible : 1;
288 opj_simple_mcc_decorrelation_data_t;
291 Tile coding parameters :
292 this structure is used to store coding/decoding parameters common to all
293 tiles (information like COD, COC in main header)
295 typedef struct opj_tcp_v2
299 /** progression order */
301 /** number of layers */
302 OPJ_UINT32 numlayers;
303 OPJ_UINT32 num_layers_to_decode;
304 /** multi-component transform identifier */
306 /** rates of layers */
307 OPJ_FLOAT32 rates[100];
308 /** number of progression order changes */
310 /** progression order changes */
312 /** packet header store there for futur use in t2_decode_packet */
314 /** used to keep a track of the allocated memory */
315 OPJ_BYTE *ppt_buffer;
316 /** Number of bytes stored inside ppt_data*/
317 OPJ_UINT32 ppt_data_size;
318 /** size of ppt_data*/
320 /** add fixed_quality */
321 OPJ_FLOAT32 distoratio[100];
322 /** tile-component coding parameters */
324 /** number of tile parts for the tile. */
325 OPJ_UINT32 m_nb_tile_parts;
326 /** data for the tile */
329 OPJ_UINT32 m_data_size;
330 /** encoding norms */
331 OPJ_FLOAT64 * mct_norms;
332 /** the mct decoding matrix */
333 OPJ_FLOAT32 * m_mct_decoding_matrix;
334 /** the mct coding matrix */
335 OPJ_FLOAT32 * m_mct_coding_matrix;
337 opj_mct_data_t * m_mct_records;
338 /** the number of mct records. */
339 OPJ_UINT32 m_nb_mct_records;
340 /** the max number of mct records. */
341 OPJ_UINT32 m_nb_max_mct_records;
343 opj_simple_mcc_decorrelation_data_t * m_mcc_records;
344 /** the number of mct records. */
345 OPJ_UINT32 m_nb_mcc_records;
346 /** the max number of mct records. */
347 OPJ_UINT32 m_nb_max_mcc_records;
351 /***** FLAGS *******/
352 /** If ppt == 1 --> there was a PPT marker for the present tile */
354 /** indicates if a POC marker has been used O:NO, 1:YES */
365 typedef struct opj_cp {
366 /** Digital cinema profile*/
367 OPJ_CINEMA_MODE cinema;
368 /** Maximum rate for each component. If == 0, component size limitation is not considered */
370 /** Size of the image in bits*/
373 OPJ_RSIZ_CAPABILITIES rsiz;
374 /** Enabling Tile part generation*/
376 /** Flag determining tile part generation*/
378 /** Position of tile part flag in progression order*/
380 /** allocation by rate/distortion */
382 /** allocation by fixed layer */
384 /** add fixed_quality */
386 /** if != 0, then original dimension divided by 2^(reduce); if == 0 or not used, image is decoded to the full resolution */
388 /** if != 0, then only the first "layer" layers are decoded; if == 0 or not used, all the quality layers are decoded */
390 /** if == NO_LIMITATION, decode entire codestream; if == LIMIT_TO_MAIN_HEADER then only decode the main header */
391 OPJ_LIMIT_DECODING limit_decoding;
400 /** comment for coding */
402 /** number of tiles in width */
404 /** number of tiles in heigth */
406 /** ID number of the tiles present in the codestream */
408 /** size of the vector tileno */
410 /** packet header store there for futur use in t2_decode_packet */
411 unsigned char *ppm_data;
412 /** pointer remaining on the first byte of the first header if ppm is used */
413 unsigned char *ppm_data_first;
414 /** if ppm == 1 --> there was a PPM marker for the present tile */
416 /** use in case of multiple marker PPM (number of info already store) */
418 /** use in case of multiple marker PPM (case on non-finished previous info) */
422 /** tile coding parameters */
428 /** enables writing of EPC in MH, thus activating JPWL */
430 /** enables writing of EPB, in case of activated JPWL */
432 /** enables writing of ESD, in case of activated JPWL */
434 /** enables writing of informative techniques of ESD, in case of activated JPWL */
436 /** enables writing of RED, in case of activated JPWL */
438 /** error protection method for MH (0,1,16,32,37-128) */
440 /** tile number of header protection specification (>=0) */
441 int hprot_TPH_tileno[JPWL_MAX_NO_TILESPECS];
442 /** error protection methods for TPHs (0,1,16,32,37-128) */
443 int hprot_TPH[JPWL_MAX_NO_TILESPECS];
444 /** tile number of packet protection specification (>=0) */
445 int pprot_tileno[JPWL_MAX_NO_PACKSPECS];
446 /** packet number of packet protection specification (>=0) */
447 int pprot_packno[JPWL_MAX_NO_PACKSPECS];
448 /** error protection methods for packets (0,1,16,32,37-128) */
449 int pprot[JPWL_MAX_NO_PACKSPECS];
450 /** enables writing of ESD, (0/2/4 bytes) */
452 /** sensitivity addressing size (0=auto/2/4 bytes) */
454 /** sensitivity range (0-3) */
456 /** sensitivity method for MH (-1,0-7) */
458 /** tile number of sensitivity specification (>=0) */
459 int sens_TPH_tileno[JPWL_MAX_NO_TILESPECS];
460 /** sensitivity methods for TPHs (-1,0-7) */
461 int sens_TPH[JPWL_MAX_NO_TILESPECS];
462 /** enables JPWL correction at the decoder */
464 /** expected number of components at the decoder */
466 /** maximum number of tiles at the decoder */
468 #endif /* USE_JPWL */
472 typedef struct opj_encoding_param
474 /** Digital cinema profile*/
475 OPJ_CINEMA_MODE m_cinema;
476 /** Maximum rate for each component. If == 0, component size limitation is not considered */
477 OPJ_UINT32 m_max_comp_size;
478 /** Position of tile part flag in progression order*/
481 OPJ_INT32 *m_matrice;
482 /** Flag determining tile part generation*/
484 /** allocation by rate/distortion */
485 OPJ_UINT32 m_disto_alloc : 1;
486 /** allocation by fixed layer */
487 OPJ_UINT32 m_fixed_alloc : 1;
488 /** add fixed_quality */
489 OPJ_UINT32 m_fixed_quality : 1;
490 /** Enabling Tile part generation*/
491 OPJ_UINT32 m_tp_on : 1;
493 opj_encoding_param_t;
495 typedef struct opj_decoding_param
497 /** if != 0, then original dimension divided by 2^(reduce); if == 0 or not used, image is decoded to the full resolution */
499 /** if != 0, then only the first "layer" layers are decoded; if == 0 or not used, all the quality layers are decoded */
502 opj_decoding_param_t;
508 typedef struct opj_cp_v2
510 /** Size of the image in bits*/
513 OPJ_RSIZ_CAPABILITIES rsiz;
515 OPJ_UINT32 tx0; // MSD see norm
517 OPJ_UINT32 ty0; // MSD see norm
524 /** number of tiles in width */
526 /** number of tiles in heigth */
532 /** packet header store there for futur use in t2_decode_packet */
534 /** size of the ppm_data*/
536 /** size of the ppm_data*/
537 OPJ_UINT32 ppm_data_read;
539 OPJ_BYTE *ppm_data_current;
541 /** packet header storage original buffer */
542 OPJ_BYTE *ppm_buffer;
543 /** pointer remaining on the first byte of the first header if ppm is used */
544 OPJ_BYTE *ppm_data_first;
545 /** Number of bytes actually stored inside the ppm_data */
546 OPJ_UINT32 ppm_data_size;
547 /** use in case of multiple marker PPM (number of info already store) */
549 /** use in case of multiple marker PPM (case on non-finished previous info) */
550 OPJ_INT32 ppm_previous;
552 /** tile coding parameters */
556 opj_decoding_param_t m_dec;
557 opj_encoding_param_t m_enc;
564 /** enables writing of EPC in MH, thus activating JPWL */
566 /** enables writing of EPB, in case of activated JPWL */
568 /** enables writing of ESD, in case of activated JPWL */
570 /** enables writing of informative techniques of ESD, in case of activated JPWL */
572 /** enables writing of RED, in case of activated JPWL */
574 /** error protection method for MH (0,1,16,32,37-128) */
576 /** tile number of header protection specification (>=0) */
577 int hprot_TPH_tileno[JPWL_MAX_NO_TILESPECS];
578 /** error protection methods for TPHs (0,1,16,32,37-128) */
579 int hprot_TPH[JPWL_MAX_NO_TILESPECS];
580 /** tile number of packet protection specification (>=0) */
581 int pprot_tileno[JPWL_MAX_NO_PACKSPECS];
582 /** packet number of packet protection specification (>=0) */
583 int pprot_packno[JPWL_MAX_NO_PACKSPECS];
584 /** error protection methods for packets (0,1,16,32,37-128) */
585 int pprot[JPWL_MAX_NO_PACKSPECS];
586 /** enables writing of ESD, (0/2/4 bytes) */
588 /** sensitivity addressing size (0=auto/2/4 bytes) */
590 /** sensitivity range (0-3) */
592 /** sensitivity method for MH (-1,0-7) */
594 /** tile number of sensitivity specification (>=0) */
595 int sens_TPH_tileno[JPWL_MAX_NO_TILESPECS];
596 /** sensitivity methods for TPHs (-1,0-7) */
597 int sens_TPH[JPWL_MAX_NO_TILESPECS];
598 /** enables JPWL correction at the decoder */
600 /** expected number of components at the decoder */
602 /** maximum number of tiles at the decoder */
604 #endif /* USE_JPWL */
606 /******** FLAGS *********/
607 /** if ppm == 1 --> there was a PPM marker*/
609 /** tells if the parameter is a coding or decoding one */
610 OPJ_UINT32 m_is_decoder : 1;
615 typedef struct opj_j2k_dec
617 /** locate in which part of the codestream the decoder is (main header, tile header, end) */
620 * store decoding parameters common to all tiles (information like COD, COC in main header)
622 opj_tcp_v2_t *m_default_tcp;
623 OPJ_BYTE *m_header_data;
624 OPJ_UINT32 m_header_data_size;
625 /** to tell the tile part length */
626 OPJ_UINT32 m_sot_length;
627 /** Only tiles index in the correct range will be decoded.*/
628 OPJ_UINT32 m_start_tile_x;
629 OPJ_UINT32 m_start_tile_y;
630 OPJ_UINT32 m_end_tile_x;
631 OPJ_UINT32 m_end_tile_y;
632 /** to tell that a tile can be decoded. */
633 OPJ_UINT32 m_can_decode : 1;
634 OPJ_UINT32 m_discard_tiles : 1;
635 OPJ_UINT32 m_skip_data : 1;
639 typedef struct opj_j2k_enc
641 /** Tile part number, regardless of poc, for each new poc, tp is reset to 1*/
642 OPJ_UINT32 m_current_poc_tile_part_number; // tp_num
644 /** Tile part number currently coding, taking into account POC. m_current_tile_part_number holds the total number of tile parts while encoding the last tile part.*/
645 OPJ_UINT32 m_current_tile_part_number; //cur_tp_num
648 locate the start position of the TLM marker
649 after encoding the tilepart, a jump (in j2k_write_sod) is done to the TLM marker to store the value of its length.
651 OPJ_SIZE_T m_tlm_start;
653 * Stores the sizes of the tlm.
655 OPJ_BYTE * m_tlm_sot_offsets_buffer;
657 * The current offset of the tlm buffer.
659 OPJ_BYTE * m_tlm_sot_offsets_current;
661 /** Total num of tile parts in whole image = num tiles* num tileparts in each tile*/
662 /** used in TLMmarker*/
663 OPJ_UINT32 m_total_tile_parts; // totnum_tp
665 /* encoded data for a tile */
666 OPJ_BYTE * m_encoded_tile_data;
668 /* size of the encoded_data */
669 OPJ_UINT32 m_encoded_tile_size;
671 /* encoded data for a tile */
672 OPJ_BYTE * m_header_tile_data;
674 /* size of the encoded_data */
675 OPJ_UINT32 m_header_tile_data_size;
681 JPEG-2000 codestream reader/writer
683 typedef struct opj_j2k {
685 opj_common_ptr cinfo;
687 /** locate in which part of the codestream the decoder is (main header, tile header, end) */
689 /** number of the tile curently concern by coding/decoding */
691 /** Tile part number*/
693 /** Tilepart number currently coding*/
695 /** Total number of tileparts of the current tile*/
698 locate the start position of the TLM marker
699 after encoding the tilepart, a jump (in j2k_write_sod) is done to the TLM marker to store the value of its length.
702 /** Total num of tile parts in whole image = num tiles* num tileparts in each tile*/
703 /** used in TLMmarker*/
706 locate the position of the end of the tile in the codestream,
707 used to detect a truncated codestream (in j2k_read_sod)
711 locate the start position of the SOT marker of the current coded tile:
712 after encoding the tile, a jump (in j2k_write_sod) is done to the SOT marker to store the value of its length.
717 as the J2K-file is written in several parts during encoding,
718 it enables to make the right correction in position return by cio_tell
721 /** array used to store the data of each tile */
722 unsigned char **tile_data;
723 /** array used to store the length of each tile */
727 store decoding parameters common to all tiles (information like COD, COC in main header)
729 opj_tcp_t *default_tcp;
730 /** pointer to the encoded / decoded image */
732 /** pointer to the coding parameters */
734 /** helper used to write the index file */
735 opj_codestream_info_t *cstr_info;
736 /** pointer to the byte i/o stream */
742 JPEG-2000 codestream reader/writer
744 typedef struct opj_j2k_v2
748 opj_j2k_dec_t m_decoder;
749 opj_j2k_enc_t m_encoder;
753 /** number of the tile curently concern by coding/decoding */
754 OPJ_UINT32 m_current_tile_number;
756 /** pointer to the encoded / decoded image */
757 //opj_image_t *m_image;
758 opj_image_header_t* m_image_header;
760 /** Coding parameters */
763 /** the list of procedures to exec **/
764 struct opj_procedure_list * m_procedure_list;
766 /** the list of validation procedures to follow to make sure the code is valid **/
767 struct opj_procedure_list * m_validation_list;
769 /** helper used to write the index file */
770 opj_codestream_info_t *cstr_info;
772 /** the current tile coder/decoder **/
773 struct opj_tcd_v2 * m_tcd;
774 //opj_tcd_v2_t * m_tcd;
776 OPJ_UINT32 m_is_decoder : 1;
784 /** @name Exported functions */
786 /* ----------------------------------------------------------------------- */
788 Creates a J2K decompression structure
789 @param cinfo Codec context info
790 @return Returns a handle to a J2K decompressor if successful, returns NULL otherwise
792 opj_j2k_t* j2k_create_decompress(opj_common_ptr cinfo);
794 Destroy a J2K decompressor handle
795 @param j2k J2K decompressor handle to destroy
797 void j2k_destroy_decompress(opj_j2k_t *j2k);
799 Setup the decoder decoding parameters using user parameters.
800 Decoding parameters are returned in j2k->cp.
801 @param j2k J2K decompressor handle
802 @param parameters decompression parameters
804 void j2k_setup_decoder(opj_j2k_t *j2k, opj_dparameters_t *parameters);
806 void j2k_setup_decoder_v2(opj_j2k_v2_t *j2k, opj_dparameters_t *parameters);
809 Decode an image from a JPEG-2000 codestream
810 @param j2k J2K decompressor handle
811 @param cio Input buffer stream
812 @param cstr_info Codestream information structure if required, NULL otherwise
813 @return Returns a decoded image if successful, returns NULL otherwise
815 opj_image_t* j2k_decode(opj_j2k_t *j2k, opj_cio_t *cio, opj_codestream_info_t *cstr_info);
817 Decode an image form a JPT-stream (JPEG 2000, JPIP)
818 @param j2k J2K decompressor handle
819 @param cio Input buffer stream
820 @param cstr_info Codestream information structure if required, NULL otherwise
821 @return Returns a decoded image if successful, returns NULL otherwise
823 opj_image_t* j2k_decode_jpt_stream(opj_j2k_t *j2k, opj_cio_t *cio, opj_codestream_info_t *cstr_info);
825 Creates a J2K compression structure
826 @param cinfo Codec context info
827 @return Returns a handle to a J2K compressor if successful, returns NULL otherwise
829 opj_j2k_t* j2k_create_compress(opj_common_ptr cinfo);
832 Creates a J2K compression structure
833 @param cinfo Codec context info
834 @return Returns a handle to a J2K compressor if successful, returns NULL otherwise
836 opj_j2k_v2_t* j2k_create_compress_v2();
839 Destroy a J2K compressor handle
840 @param j2k J2K compressor handle to destroy
842 void j2k_destroy_compress(opj_j2k_t *j2k);
844 Setup the encoder parameters using the current image and using user parameters.
845 Coding parameters are returned in j2k->cp.
846 @param j2k J2K compressor handle
847 @param parameters compression parameters
848 @param image input filled image
850 void j2k_setup_encoder(opj_j2k_t *j2k, opj_cparameters_t *parameters, opj_image_t *image);
852 Converts an enum type progression order to string type
854 char *j2k_convert_progression_order(OPJ_PROG_ORDER prg_order);
856 Encode an image into a JPEG-2000 codestream
857 @param j2k J2K compressor handle
858 @param cio Output buffer stream
859 @param image Image to encode
860 @param cstr_info Codestream information structure if required, NULL otherwise
861 @return Returns true if successful, returns false otherwise
863 opj_bool j2k_encode(opj_j2k_t *j2k, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info);
865 /* ----------------------------------------------------------------------- */
871 * Ends the decompression procedures and possibiliy add data to be read after the
874 opj_bool j2k_end_decompress(opj_j2k_v2_t *j2k, struct opj_stream_private *cio, struct opj_event_mgr * p_manager);
877 * Reads a jpeg2000 codestream header structure.
879 * @param cio the stream to read data from.
880 * @param p_j2k the jpeg2000 codec.
881 * @param p_manager the user event manager.
883 * @return true if the box is valid.
885 opj_bool j2k_read_header( struct opj_stream_private *p_stream,
887 struct opj_image_header** image_header,
888 struct opj_codestream_info** cstr_info,
889 struct opj_event_mgr* p_manager );
893 * Destroys a jpeg2000 codec.
895 * @param p_j2k the jpeg20000 structure to destroy.
897 void j2k_destroy (opj_j2k_v2_t *p_j2k);
901 * @param p_j2k the jpeg2000 codec.
902 * @param p_stream the stream to write data to.
903 * @param p_manager the user event manager.
905 opj_bool j2k_decode_tile (
906 opj_j2k_v2_t * p_j2k,
907 OPJ_UINT32 p_tile_index,
909 OPJ_UINT32 p_data_size,
910 struct opj_stream_private *p_stream,
911 struct opj_event_mgr * p_manager
915 * Reads a tile header.
916 * @param p_j2k the jpeg2000 codec.
917 * @param p_stream the stream to write data to.
918 * @param p_manager the user event manager.
920 opj_bool j2k_read_tile_header (
921 opj_j2k_v2_t * p_j2k,
922 OPJ_UINT32 * p_tile_index,
923 OPJ_UINT32 * p_data_size,
924 OPJ_INT32 * p_tile_x0,
925 OPJ_INT32 * p_tile_y0,
926 OPJ_INT32 * p_tile_x1,
927 OPJ_INT32 * p_tile_y1,
928 OPJ_UINT32 * p_nb_comps,
930 struct opj_stream_private *p_stream,
931 struct opj_event_mgr * p_manager
936 * Sets the given area to be decoded. This function should be called right after opj_read_header and before any tile header reading.
938 * @param p_j2k the jpeg2000 codec.
939 * @param p_start_x the left position of the rectangle to decode (in image coordinates).
940 * @param p_end_x the right position of the rectangle to decode (in image coordinates).
941 * @param p_start_y the up position of the rectangle to decode (in image coordinates).
942 * @param p_end_y the bottom position of the rectangle to decode (in image coordinates).
943 * @param p_manager the user event manager
945 * @return true if the area could be set.
947 opj_bool j2k_set_decode_area(
953 struct opj_event_mgr * p_manager
957 * Creates a J2K decompression structure.
959 * @return a handle to a J2K decompressor if successful, NULL otherwise.
961 opj_j2k_v2_t* j2k_create_decompress_v2();