2 * The copyright in this software is being made available under the 2-clauses
3 * BSD License, included below. This software may be subject to other third
4 * party and contributor rights, including patent rights, and no such rights
5 * are granted under this license.
7 * Copyright (c) 2002-2014, Universite catholique de Louvain (UCL), Belgium
8 * Copyright (c) 2002-2014, Professor Benoit Macq
9 * Copyright (c) 2001-2003, David Janssens
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
14 * Copyright (c) 2006-2007, Parvatha Elangovan
15 * Copyright (c) 2010-2011, Kaori Hagihara
16 * All rights reserved.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
28 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
31 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
43 ==========================================================
45 ==========================================================
48 #if defined(OPJ_STATIC) || !defined(_WIN32)
49 /* http://gcc.gnu.org/wiki/Visibility */
51 #define OPJ_API __attribute__ ((visibility ("default")))
52 #define OPJ_LOCAL __attribute__ ((visibility ("hidden")))
59 #define OPJ_CALLCONV __stdcall
61 The following ifdef block is the standard way of creating macros which make exporting
62 from a DLL simpler. All files within this DLL are compiled with the OPJ_EXPORTS
63 symbol defined on the command line. this symbol should not be defined on any project
64 that uses this DLL. This way any other project whose source files include this file see
65 OPJ_API functions as being imported from a DLL, whereas this DLL sees symbols
66 defined with this macro as being exported.
68 #if defined(OPJ_EXPORTS) || defined(DLL_EXPORT)
69 #define OPJ_API __declspec(dllexport)
71 #define OPJ_API __declspec(dllimport)
72 #endif /* OPJ_EXPORTS */
73 #endif /* !OPJ_STATIC || !_WIN32 */
79 /* Avoid compile-time warning because parameter is not used */
80 #define OPJ_ARG_NOT_USED(x) (void)(x)
82 ==========================================================
83 Useful constant definitions
84 ==========================================================
87 #define OPJ_PATH_LEN 4096 /**< Maximum allowed size for filenames */
89 #define J2K_MAXRLVLS 33 /**< Number of maximum resolution level authorized */
90 #define J2K_MAXBANDS (3*J2K_MAXRLVLS-2) /**< Number of maximum sub-band linked to number of resolution level */
93 #define JPWL_MAX_NO_TILESPECS 16 /**< Maximum number of tile parts expected by JPWL: increase at your will */
94 #define JPWL_MAX_NO_PACKSPECS 16 /**< Maximum number of packet parts expected by JPWL: increase at your will */
95 #define JPWL_MAX_NO_MARKERS 512 /**< Maximum number of JPWL markers: increase at your will */
96 #define JPWL_PRIVATEINDEX_NAME "jpwl_index_privatefilename" /**< index file name used when JPWL is on */
97 #define JPWL_EXPECTED_COMPONENTS 3 /**< Expect this number of components, so you'll find better the first EPB */
98 #define JPWL_MAXIMUM_TILES 8192 /**< Expect this maximum number of tiles, to avoid some crashes */
99 #define JPWL_MAXIMUM_HAMMING 2 /**< Expect this maximum number of bit errors in marker id's */
100 #define JPWL_MAXIMUM_EPB_ROOM 65450 /**< Expect this maximum number of bytes for composition of EPBs */
104 ==========================================================
106 ==========================================================
111 typedef enum RSIZ_CAPABILITIES {
112 STD_RSIZ = 0, /** Standard JPEG2000 profile*/
113 CINEMA2K = 3, /** Profile name for a 2K image*/
114 CINEMA4K = 4 /** Profile name for a 4K image*/
115 } OPJ_RSIZ_CAPABILITIES;
118 Digital cinema operation mode
120 typedef enum CINEMA_MODE {
121 OFF = 0, /** Not Digital Cinema*/
122 CINEMA2K_24 = 1, /** 2K Digital Cinema at 24 fps*/
123 CINEMA2K_48 = 2, /** 2K Digital Cinema at 48 fps*/
124 CINEMA4K_24 = 3 /** 4K Digital Cinema at 24 fps*/
130 typedef enum PROG_ORDER {
131 PROG_UNKNOWN = -1, /**< place-holder */
132 LRCP = 0, /**< layer-resolution-component-precinct order */
133 RLCP = 1, /**< resolution-layer-component-precinct order */
134 RPCL = 2, /**< resolution-precinct-component-layer order */
135 PCRL = 3, /**< precinct-component-resolution-layer order */
136 CPRL = 4 /**< component-precinct-resolution-layer order */
140 Supported image color spaces
142 typedef enum COLOR_SPACE {
143 CLRSPC_UNKNOWN = -1, /**< not supported by the library */
144 CLRSPC_UNSPECIFIED = 0, /**< not specified in the codestream */
145 CLRSPC_SRGB = 1, /**< sRGB */
146 CLRSPC_GRAY = 2, /**< grayscale */
147 CLRSPC_SYCC = 3 /**< YUV */
150 #define ENUMCS_SRGB 16
151 #define ENUMCS_GRAY 17
152 #define ENUMCS_SYCC 18
157 typedef enum CODEC_FORMAT {
158 CODEC_UNKNOWN = -1, /**< place-holder */
159 CODEC_J2K = 0, /**< JPEG-2000 codestream : read/write */
160 CODEC_JPT = 1, /**< JPT-stream (JPEG 2000, JPIP) : read only */
161 CODEC_JP2 = 2 /**< JPEG-2000 file format : read/write */
165 Limit decoding to certain portions of the codestream.
167 typedef enum LIMIT_DECODING {
168 NO_LIMITATION = 0, /**< No limitation for the decoding. The entire codestream will de decoded */
169 LIMIT_TO_MAIN_HEADER = 1, /**< The decoding is limited to the Main Header */
170 DECODE_ALL_BUT_PACKETS = 2 /**< Decode everything except the JPEG 2000 packets */
171 } OPJ_LIMIT_DECODING;
174 ==========================================================
175 event manager typedef definitions
176 ==========================================================
180 Callback function prototype for events
181 @param msg Event message
184 typedef void (*opj_msg_callback) (const char *msg, void *client_data);
187 Message handler object
192 <li>Debugging messages
195 typedef struct opj_event_mgr {
196 /** Error message callback if available, NULL otherwise */
197 opj_msg_callback error_handler;
198 /** Warning message callback if available, NULL otherwise */
199 opj_msg_callback warning_handler;
200 /** Debug message callback if available, NULL otherwise */
201 opj_msg_callback info_handler;
206 ==========================================================
207 codec typedef definitions
208 ==========================================================
212 Progression order changes
214 typedef struct opj_poc {
215 /** Resolution num start, Component num start, given by POC */
217 /** Layer num end,Resolution num end, Component num end, given by POC */
218 int layno1, resno1, compno1;
219 /** Layer num start,Precinct num start, Precinct num end */
220 int layno0, precno0, precno1;
221 /** Progression order enum*/
222 OPJ_PROG_ORDER prg1,prg;
223 /** Progression order string*/
227 /** Start and end values for Tile width and height*/
229 /** Start value, initialised in pi_initialise_encode*/
230 int layS, resS, compS, prcS;
231 /** End value, initialised in pi_initialise_encode */
232 int layE, resE, compE, prcE;
233 /** Start and end values of Tile width and height, initialised in pi_initialise_encode*/
234 int txS,txE,tyS,tyE,dx,dy;
235 /** Temporary values for Tile parts, initialised in pi_create_encode */
236 int lay_t, res_t, comp_t, prc_t,tx0_t,ty0_t;
240 Compression parameters
242 typedef struct opj_cparameters {
243 /** size of tile: tile_size_on = false (not in argument) or = true (in argument) */
244 opj_bool tile_size_on;
253 /** allocation by rate/distortion */
255 /** allocation by fixed layer */
257 /** add fixed_quality */
258 int cp_fixed_quality;
261 /** comment for coding */
263 /** csty : coding style */
265 /** progression order (default LRCP) */
266 OPJ_PROG_ORDER prog_order;
267 /** progression order changes */
269 /** number of progression order changes (POC), default to 0 */
271 /** number of layers */
273 /** rates of layers */
274 float tcp_rates[100];
275 /** different psnr for successive layers */
276 float tcp_distoratio[100];
277 /** number of resolutions */
279 /** initial code block width, default to 64 */
281 /** initial code block height, default to 64 */
283 /** mode switch (cblk_style) */
285 /** 1 : use the irreversible DWT 9-7, 0 : use lossless compression (default) */
287 /** region of interest: affected component in [0..3], -1 means no ROI */
289 /** region of interest: upshift value */
291 /* number of precinct size specifications */
293 /** initial precinct width */
294 int prcw_init[J2K_MAXRLVLS];
295 /** initial precinct height */
296 int prch_init[J2K_MAXRLVLS];
298 /**@name command line encoder parameters (not used inside the library) */
300 /** input file name */
301 char infile[OPJ_PATH_LEN];
302 /** output file name */
303 char outfile[OPJ_PATH_LEN];
304 /** DEPRECATED. Index generation is now handeld with the opj_encode_with_info() function. Set to NULL */
306 /** DEPRECATED. Index generation is now handeld with the opj_encode_with_info() function. Set to NULL */
307 char index[OPJ_PATH_LEN];
308 /** subimage encoding: origin image offset in x direction */
310 /** subimage encoding: origin image offset in y direction */
312 /** subsampling value for dx */
314 /** subsampling value for dy */
316 /** input file format 0: PGX, 1: PxM, 2: BMP 3:TIF*/
318 /** output file format 0: J2K, 1: JP2, 2: JPT */
323 /**@name JPWL encoding parameters */
325 /** enables writing of EPC in MH, thus activating JPWL */
326 opj_bool jpwl_epc_on;
327 /** error protection method for MH (0,1,16,32,37-128) */
329 /** tile number of header protection specification (>=0) */
330 int jpwl_hprot_TPH_tileno[JPWL_MAX_NO_TILESPECS];
331 /** error protection methods for TPHs (0,1,16,32,37-128) */
332 int jpwl_hprot_TPH[JPWL_MAX_NO_TILESPECS];
333 /** tile number of packet protection specification (>=0) */
334 int jpwl_pprot_tileno[JPWL_MAX_NO_PACKSPECS];
335 /** packet number of packet protection specification (>=0) */
336 int jpwl_pprot_packno[JPWL_MAX_NO_PACKSPECS];
337 /** error protection methods for packets (0,1,16,32,37-128) */
338 int jpwl_pprot[JPWL_MAX_NO_PACKSPECS];
339 /** enables writing of ESD, (0=no/1/2 bytes) */
341 /** sensitivity addressing size (0=auto/2/4 bytes) */
343 /** sensitivity range (0-3) */
345 /** sensitivity method for MH (-1=no,0-7) */
347 /** tile number of sensitivity specification (>=0) */
348 int jpwl_sens_TPH_tileno[JPWL_MAX_NO_TILESPECS];
349 /** sensitivity methods for TPHs (-1=no,0-7) */
350 int jpwl_sens_TPH[JPWL_MAX_NO_TILESPECS];
354 /** Digital Cinema compliance 0-not compliant, 1-compliant*/
355 OPJ_CINEMA_MODE cp_cinema;
356 /** Maximum rate for each component. If == 0, component size limitation is not considered */
359 OPJ_RSIZ_CAPABILITIES cp_rsiz;
360 /** Tile part generation*/
362 /** Flag for Tile part generation*/
364 /** MCT (multiple component transform) */
368 #define OPJ_DPARAMETERS_IGNORE_PCLR_CMAP_CDEF_FLAG 0x0001
371 Decompression parameters
373 typedef struct opj_dparameters {
375 Set the number of highest resolution levels to be discarded.
376 The image resolution is effectively divided by 2 to the power of the number of discarded levels.
377 The reduce factor is limited by the smallest total number of decomposition levels among tiles.
378 if != 0, then original dimension divided by 2^(reduce);
379 if == 0 or not used, image is decoded to the full resolution
383 Set the maximum number of quality layers to decode.
384 If there are less quality layers than the specified number, all the quality layers are decoded.
385 if != 0, then only the first "layer" layers are decoded;
386 if == 0 or not used, all the quality layers are decoded
390 /**@name command line encoder parameters (not used inside the library) */
392 /** input file name */
393 char infile[OPJ_PATH_LEN];
394 /** output file name */
395 char outfile[OPJ_PATH_LEN];
396 /** input file format 0: J2K, 1: JP2, 2: JPT */
398 /** output file format 0: PGX, 1: PxM, 2: BMP */
403 /**@name JPWL decoding parameters */
405 /** activates the JPWL correction capabilities */
406 opj_bool jpwl_correct;
407 /** expected number of components */
409 /** maximum number of tiles */
415 Specify whether the decoding should be done on the entire codestream, or be limited to the main header
416 Limiting the decoding to the main header makes it possible to extract the characteristics of the codestream
417 if == NO_LIMITATION, the entire codestream is decoded;
418 if == LIMIT_TO_MAIN_HEADER, only the main header is decoded;
420 OPJ_LIMIT_DECODING cp_limit_decoding;
425 /** Common fields between JPEG-2000 compression and decompression master structs. */
427 #define opj_common_fields \
428 opj_event_mgr_t *event_mgr; /**< pointer to the event manager */\
429 void * client_data; /**< Available for use by application */\
430 opj_bool is_decompressor; /**< So common code can tell which is which */\
431 OPJ_CODEC_FORMAT codec_format; /**< selected codec */\
432 void *j2k_handle; /**< pointer to the J2K codec */\
433 void *jp2_handle; /**< pointer to the JP2 codec */\
434 void *mj2_handle /**< pointer to the MJ2 codec */
436 /* Routines that are to be used by both halves of the library are declared
437 * to receive a pointer to this structure. There are no actual instances of
438 * opj_common_struct_t, only of opj_cinfo_t and opj_dinfo_t.
440 typedef struct opj_common_struct {
441 opj_common_fields; /* Fields common to both master struct types */
442 /* Additional fields follow in an actual opj_cinfo_t or
443 * opj_dinfo_t. All three structs must agree on these
444 * initial fields! (This would be a lot cleaner in C++.)
446 } opj_common_struct_t;
448 typedef opj_common_struct_t * opj_common_ptr;
451 Compression context info
453 typedef struct opj_cinfo {
454 /** Fields shared with opj_dinfo_t */
456 /* other specific fields go here */
460 Decompression context info
462 typedef struct opj_dinfo {
463 /** Fields shared with opj_cinfo_t */
465 /* other specific fields go here */
469 ==========================================================
470 I/O stream typedef definitions
471 ==========================================================
477 /** The stream was opened for reading. */
478 #define OPJ_STREAM_READ 0x0001
479 /** The stream was opened for writing. */
480 #define OPJ_STREAM_WRITE 0x0002
483 Byte input-output stream (CIO)
485 typedef struct opj_cio {
487 opj_common_ptr cinfo;
489 /** open mode (read/write) either OPJ_STREAM_READ or OPJ_STREAM_WRITE */
491 /** pointer to the start of the buffer */
492 unsigned char *buffer;
493 /** buffer size in bytes */
496 /** pointer to the start of the stream */
497 unsigned char *start;
498 /** pointer to the end of the stream */
500 /** pointer to the current position */
505 ==========================================================
506 image typedef definitions
507 ==========================================================
511 Defines a single image component
513 typedef struct opj_image_comp {
514 /** XRsiz: horizontal separation of a sample of ith component with respect to the reference grid */
516 /** YRsiz: vertical separation of a sample of ith component with respect to the reference grid */
522 /** x component offset compared to the whole image */
524 /** y component offset compared to the whole image */
528 /** image depth in bits */
530 /** signed (1) / unsigned (0) */
532 /** number of decoded resolution */
534 /** number of division by 2 of the out image compared to the original size of image */
536 /** image component data */
541 Defines image data and characteristics
543 typedef struct opj_image {
544 /** XOsiz: horizontal offset from the origin of the reference grid to the left side of the image area */
546 /** YOsiz: vertical offset from the origin of the reference grid to the top side of the image area */
548 /** Xsiz: width of the reference grid */
550 /** Ysiz: height of the reference grid */
552 /** number of components in the image */
554 /** color space: sRGB, Greyscale or YUV */
555 OPJ_COLOR_SPACE color_space;
556 /** image components */
557 opj_image_comp_t *comps;
558 /** 'restricted' ICC profile */
559 unsigned char *icc_profile_buf;
560 /** size of ICC profile */
565 Component parameters structure used by the opj_image_create function
567 typedef struct opj_image_comptparm {
568 /** XRsiz: horizontal separation of a sample of ith component with respect to the reference grid */
570 /** YRsiz: vertical separation of a sample of ith component with respect to the reference grid */
576 /** x component offset compared to the whole image */
578 /** y component offset compared to the whole image */
582 /** image depth in bits */
584 /** signed (1) / unsigned (0) */
586 } opj_image_cmptparm_t;
589 ==========================================================
590 Information on the JPEG 2000 codestream
591 ==========================================================
595 Index structure : Information concerning a packet inside tile
597 typedef struct opj_packet_info {
598 /** packet start position (including SOP marker if it exists) */
600 /** end of packet header position (including EPH marker if it exists)*/
602 /** packet end position */
604 /** packet distorsion */
613 typedef struct opj_marker_info_t {
615 unsigned short int type;
616 /** position in codestream */
618 /** length, marker val included */
624 Index structure : Information concerning tile-parts
626 typedef struct opj_tp_info {
627 /** start position of tile part */
629 /** end position of tile part header */
631 /** end position of tile part */
633 /** start packet of tile part */
635 /** number of packets of tile part */
640 Index structure : information regarding tiles
642 typedef struct opj_tile_info {
643 /** value of thresh for each layer by tile cfr. Marcela */
645 /** number of tile */
647 /** start position */
649 /** end position of the header */
653 /** precinct number for each resolution level (width) */
655 /** precinct number for each resolution level (height) */
657 /** precinct size (in power of 2), in X for each resolution level */
659 /** precinct size (in power of 2), in Y for each resolution level */
661 /** information concerning packets inside tile */
662 opj_packet_info_t *packet;
663 /** add fixed_quality */
665 /** add fixed_quality */
667 /** number of markers */
669 /** list of markers */
670 opj_marker_info_t *marker;
671 /** actual size of markers array */
673 /** number of tile parts */
675 /** information concerning tile parts */
680 Index structure of the codestream
682 typedef struct opj_codestream_info {
683 /** maximum distortion reduction on the whole image (add for Marcela) */
687 /** writing the packet in the index with t2_encode_packets */
693 /** progression order */
695 /** tile size in x */
697 /** tile size in y */
703 /** number of tiles in X */
705 /** number of tiles in Y */
707 /** component numbers */
709 /** number of layer */
711 /** number of decomposition for each component */
714 /** number of markers */
716 /** list of markers */
717 opj_marker_info_t *marker;
718 /** actual size of markers array */
721 /** main header position */
723 /** main header position */
725 /** codestream's size */
727 /** information regarding tiles inside image */
728 opj_tile_info_t *tile;
729 } opj_codestream_info_t;
737 ==========================================================
739 ==========================================================
742 OPJ_API const char * OPJ_CALLCONV opj_version(void);
745 ==========================================================
746 image functions definitions
747 ==========================================================
752 @param numcmpts number of components
753 @param cmptparms components parameters
754 @param clrspc image color space
755 @return returns a new image structure if successful, returns NULL otherwise
757 OPJ_API opj_image_t* OPJ_CALLCONV opj_image_create(int numcmpts, opj_image_cmptparm_t *cmptparms, OPJ_COLOR_SPACE clrspc);
760 Deallocate any resources associated with an image
761 @param image image to be destroyed
763 OPJ_API void OPJ_CALLCONV opj_image_destroy(opj_image_t *image);
766 ==========================================================
767 stream functions definitions
768 ==========================================================
772 Open and allocate a memory stream for read / write.
773 On reading, the user must provide a buffer containing encoded data. The buffer will be
774 wrapped by the returned CIO handle.
775 On writing, buffer parameters must be set to 0: a buffer will be allocated by the library
776 to contain encoded data.
777 @param cinfo Codec context info
778 @param buffer Reading: buffer address. Writing: NULL
779 @param length Reading: buffer length. Writing: 0
780 @return Returns a CIO handle if successful, returns NULL otherwise
782 OPJ_API opj_cio_t* OPJ_CALLCONV opj_cio_open(opj_common_ptr cinfo, unsigned char *buffer, int length);
785 Close and free a CIO handle
786 @param cio CIO handle to free
788 OPJ_API void OPJ_CALLCONV opj_cio_close(opj_cio_t *cio);
791 Get position in byte stream
792 @param cio CIO handle
793 @return Returns the position in bytes
795 OPJ_API int OPJ_CALLCONV cio_tell(opj_cio_t *cio);
797 Set position in byte stream
798 @param cio CIO handle
799 @param pos Position, in number of bytes, from the beginning of the stream
801 OPJ_API void OPJ_CALLCONV cio_seek(opj_cio_t *cio, int pos);
804 ==========================================================
805 event manager functions definitions
806 ==========================================================
809 OPJ_API opj_event_mgr_t* OPJ_CALLCONV opj_set_event_mgr(opj_common_ptr cinfo, opj_event_mgr_t *event_mgr, void *context);
812 ==========================================================
813 codec functions definitions
814 ==========================================================
817 Creates a J2K/JPT/JP2 decompression structure
818 @param format Decoder to select
819 @return Returns a handle to a decompressor if successful, returns NULL otherwise
821 OPJ_API opj_dinfo_t* OPJ_CALLCONV opj_create_decompress(OPJ_CODEC_FORMAT format);
823 Destroy a decompressor handle
824 @param dinfo decompressor handle to destroy
826 OPJ_API void OPJ_CALLCONV opj_destroy_decompress(opj_dinfo_t *dinfo);
828 Set decoding parameters to default values
829 @param parameters Decompression parameters
831 OPJ_API void OPJ_CALLCONV opj_set_default_decoder_parameters(opj_dparameters_t *parameters);
833 Setup the decoder decoding parameters using user parameters.
834 Decoding parameters are returned in j2k->cp.
835 @param dinfo decompressor handle
836 @param parameters decompression parameters
838 OPJ_API void OPJ_CALLCONV opj_setup_decoder(opj_dinfo_t *dinfo, opj_dparameters_t *parameters);
840 Decode an image from a JPEG-2000 codestream
841 @param dinfo decompressor handle
842 @param cio Input buffer stream
843 @return Returns a decoded image if successful, returns NULL otherwise
845 OPJ_API opj_image_t* OPJ_CALLCONV opj_decode(opj_dinfo_t *dinfo, opj_cio_t *cio);
848 Decode an image from a JPEG-2000 codestream and extract the codestream information
849 @param dinfo decompressor handle
850 @param cio Input buffer stream
851 @param cstr_info Codestream information structure if needed afterwards, NULL otherwise
852 @return Returns a decoded image if successful, returns NULL otherwise
854 OPJ_API opj_image_t* OPJ_CALLCONV opj_decode_with_info(opj_dinfo_t *dinfo, opj_cio_t *cio, opj_codestream_info_t *cstr_info);
856 Creates a J2K/JP2 compression structure
857 @param format Coder to select
858 @return Returns a handle to a compressor if successful, returns NULL otherwise
860 OPJ_API opj_cinfo_t* OPJ_CALLCONV opj_create_compress(OPJ_CODEC_FORMAT format);
862 Destroy a compressor handle
863 @param cinfo compressor handle to destroy
865 OPJ_API void OPJ_CALLCONV opj_destroy_compress(opj_cinfo_t *cinfo);
867 Set encoding parameters to default values, that means :
871 <li>Size of precinct : 2^15 x 2^15 (means 1 precinct)
872 <li>Size of code-block : 64 x 64
873 <li>Number of resolutions: 6
874 <li>No SOP marker in the codestream
875 <li>No EPH marker in the codestream
876 <li>No sub-sampling in x or y direction
877 <li>No mode switch activated
878 <li>Progression order: LRCP
881 <li>No offset of the origin of the image
882 <li>No offset of the origin of the tiles
883 <li>Reversible DWT 5-3
885 @param parameters Compression parameters
887 OPJ_API void OPJ_CALLCONV opj_set_default_encoder_parameters(opj_cparameters_t *parameters);
889 Setup the encoder parameters using the current image and using user parameters.
890 @param cinfo Compressor handle
891 @param parameters Compression parameters
892 @param image Input filled image
894 OPJ_API void OPJ_CALLCONV opj_setup_encoder(opj_cinfo_t *cinfo, opj_cparameters_t *parameters, opj_image_t *image);
896 Encode an image into a JPEG-2000 codestream
897 3@param cinfo compressor handle
898 @param cio Output buffer stream
899 @param image Image to encode
900 @param index Depreacted -> Set to NULL. To extract index, used opj_encode_wci()
901 @return Returns true if successful, returns false otherwise
903 OPJ_API opj_bool OPJ_CALLCONV opj_encode(opj_cinfo_t *cinfo, opj_cio_t *cio, opj_image_t *image, char *index);
905 Encode an image into a JPEG-2000 codestream and extract the codestream information
906 @param cinfo compressor handle
907 @param cio Output buffer stream
908 @param image Image to encode
909 @param cstr_info Codestream information structure if needed afterwards, NULL otherwise
910 @return Returns true if successful, returns false otherwise
912 OPJ_API opj_bool OPJ_CALLCONV opj_encode_with_info(opj_cinfo_t *cinfo, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info);
914 Destroy Codestream information after compression or decompression
915 @param cstr_info Codestream information structure
917 OPJ_API void OPJ_CALLCONV opj_destroy_cstr_info(opj_codestream_info_t *cstr_info);
924 #endif /* OPENJPEG_H */