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
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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 */
82 #define J2K_MS_EPC 0xff68 /**< EPC marker value (Part 11: JPEG 2000 for Wireless) */
83 #define J2K_MS_EPB 0xff66 /**< EPB marker value (Part 11: JPEG 2000 for Wireless) */
84 #define J2K_MS_ESD 0xff67 /**< ESD marker value (Part 11: JPEG 2000 for Wireless) */
85 #define J2K_MS_RED 0xff69 /**< RED marker value (Part 11: JPEG 2000 for Wireless) */
88 #define J2K_MS_SEC 0xff65 /**< SEC marker value (Part 8: Secure JPEG 2000) */
89 #define J2K_MS_INSEC 0xff94 /**< INSEC marker value (Part 8: Secure JPEG 2000) */
90 #endif /* USE_JPSEC */
94 /* ----------------------------------------------------------------------- */
97 Values that specify the status of the decoding process when decoding the main header.
98 These values may be combined with a | operator.
100 typedef enum J2K_STATUS {
101 J2K_STATE_MHSOC = 0x0001, /**< a SOC marker is expected */
102 J2K_STATE_MHSIZ = 0x0002, /**< a SIZ marker is expected */
103 J2K_STATE_MH = 0x0004, /**< the decoding process is in the main header */
104 J2K_STATE_TPHSOT = 0x0008, /**< the decoding process is in a tile part header and expects a SOT marker */
105 J2K_STATE_TPH = 0x0010, /**< the decoding process is in a tile part header */
106 J2K_STATE_MT = 0x0020, /**< the EOC marker has just been read */
107 J2K_STATE_NEOC = 0x0040, /**< the decoding process must not expect a EOC marker because the codestream is truncated */
108 J2K_STATE_ERR = 0x0080 /**< the decoding process has encountered an error */
111 /* ----------------------------------------------------------------------- */
116 typedef enum T2_MODE {
117 THRESH_CALC = 0, /** Function called in Rate allocation process*/
118 FINAL_PASS = 1 /** Function called in Tier 2 process*/
122 Quantization stepsize
124 typedef struct opj_stepsize {
132 Tile-component coding parameters
134 typedef struct opj_tccp {
137 /** number of resolutions */
139 /** code-blocks width */
141 /** code-blocks height */
143 /** code-block coding style */
145 /** discrete wavelet transform identifier */
147 /** quantisation style */
149 /** stepsizes used for quantization */
150 opj_stepsize_t stepsizes[J2K_MAXBANDS];
151 /** number of guard bits */
153 /** Region Of Interest shift */
155 /** precinct width */
156 int prcw[J2K_MAXRLVLS];
157 /** precinct height */
158 int prch[J2K_MAXRLVLS];
162 Tile coding parameters :
163 this structure is used to store coding/decoding parameters common to all
164 tiles (information like COD, COC in main header)
166 typedef struct opj_tcp {
167 /** 1 : first part-tile of a tile */
171 /** progression order */
173 /** number of layers */
175 /** multi-component transform identifier */
177 /** rates of layers */
179 /** number of progression order changes */
181 /** indicates if a POC marker has been used O:NO, 1:YES */
183 /** progression order changes */
185 /** packet header store there for futur use in t2_decode_packet */
186 unsigned char *ppt_data;
187 /** pointer remaining on the first byte of the first header if ppt is used */
188 unsigned char *ppt_data_first;
189 /** If ppt == 1 --> there was a PPT marker for the present tile */
191 /** used in case of multiple marker PPT (number of info already stored) */
195 /** add fixed_quality */
196 float distoratio[100];
197 /** tile-component coding parameters */
204 typedef struct opj_cp {
205 /** Digital cinema profile*/
206 OPJ_CINEMA_MODE cinema;
207 /** Maximum rate for each component. If == 0, component size limitation is not considered */
209 /** Size of the image in bits*/
212 OPJ_RSIZ_CAPABILITIES rsiz;
213 /** Enabling Tile part generation*/
215 /** Flag determining tile part generation*/
217 /** Position of tile part flag in progression order*/
219 /** allocation by rate/distortion */
221 /** allocation by fixed layer */
223 /** add fixed_quality */
225 /** if != 0, then original dimension divided by 2^(reduce); if == 0 or not used, image is decoded to the full resolution */
227 /** if != 0, then only the first "layer" layers are decoded; if == 0 or not used, all the quality layers are decoded */
229 /** if == NO_LIMITATION, decode entire codestream; if == LIMIT_TO_MAIN_HEADER then only decode the main header */
230 OPJ_LIMIT_DECODING limit_decoding;
239 /** comment for coding */
241 /** number of tiles in width */
243 /** number of tiles in heigth */
245 /** ID number of the tiles present in the codestream */
247 /** size of the vector tileno */
249 /** packet header store there for futur use in t2_decode_packet */
250 unsigned char *ppm_data;
251 /** pointer remaining on the first byte of the first header if ppm is used */
252 unsigned char *ppm_data_first;
253 /** if ppm == 1 --> there was a PPM marker for the present tile */
255 /** use in case of multiple marker PPM (number of info already store) */
257 /** use in case of multiple marker PPM (case on non-finished previous info) */
261 /** tile coding parameters */
267 /** enables writing of EPC in MH, thus activating JPWL */
269 /** enables writing of EPB, in case of activated JPWL */
271 /** enables writing of ESD, in case of activated JPWL */
273 /** enables writing of informative techniques of ESD, in case of activated JPWL */
275 /** enables writing of RED, in case of activated JPWL */
277 /** error protection method for MH (0,1,16,32,37-128) */
279 /** tile number of header protection specification (>=0) */
280 int hprot_TPH_tileno[JPWL_MAX_NO_TILESPECS];
281 /** error protection methods for TPHs (0,1,16,32,37-128) */
282 int hprot_TPH[JPWL_MAX_NO_TILESPECS];
283 /** tile number of packet protection specification (>=0) */
284 int pprot_tileno[JPWL_MAX_NO_PACKSPECS];
285 /** packet number of packet protection specification (>=0) */
286 int pprot_packno[JPWL_MAX_NO_PACKSPECS];
287 /** error protection methods for packets (0,1,16,32,37-128) */
288 int pprot[JPWL_MAX_NO_PACKSPECS];
289 /** enables writing of ESD, (0/2/4 bytes) */
291 /** sensitivity addressing size (0=auto/2/4 bytes) */
293 /** sensitivity range (0-3) */
295 /** sensitivity method for MH (-1,0-7) */
297 /** tile number of sensitivity specification (>=0) */
298 int sens_TPH_tileno[JPWL_MAX_NO_TILESPECS];
299 /** sensitivity methods for TPHs (-1,0-7) */
300 int sens_TPH[JPWL_MAX_NO_TILESPECS];
301 /** enables JPWL correction at the decoder */
303 /** expected number of components at the decoder */
305 /** maximum number of tiles at the decoder */
307 #endif /* USE_JPWL */
312 JPEG-2000 codestream reader/writer
314 typedef struct opj_j2k {
316 opj_common_ptr cinfo;
318 /** locate in which part of the codestream the decoder is (main header, tile header, end) */
320 /** number of the tile curently concern by coding/decoding */
322 /** Tile part number*/
324 /** Tilepart number currently coding*/
326 /** Total number of tileparts of the current tile*/
329 locate the start position of the TLM marker
330 after encoding the tilepart, a jump (in j2k_write_sod) is done to the TLM marker to store the value of its length.
333 /** Total num of tile parts in whole image = num tiles* num tileparts in each tile*/
334 /** used in TLMmarker*/
337 locate the position of the end of the tile in the codestream,
338 used to detect a truncated codestream (in j2k_read_sod)
342 locate the start position of the SOT marker of the current coded tile:
343 after encoding the tile, a jump (in j2k_write_sod) is done to the SOT marker to store the value of its length.
348 as the J2K-file is written in several parts during encoding,
349 it enables to make the right correction in position return by cio_tell
352 /** array used to store the data of each tile */
353 unsigned char **tile_data;
354 /** array used to store the length of each tile */
358 store decoding parameters common to all tiles (information like COD, COC in main header)
360 opj_tcp_t *default_tcp;
361 /** pointer to the encoded / decoded image */
363 /** pointer to the coding parameters */
365 /** helper used to write the index file */
366 opj_codestream_info_t *cstr_info;
367 /** pointer to the byte i/o stream */
371 /** @name Exported functions */
373 /* ----------------------------------------------------------------------- */
375 Creates a J2K decompression structure
376 @param cinfo Codec context info
377 @return Returns a handle to a J2K decompressor if successful, returns NULL otherwise
379 opj_j2k_t* j2k_create_decompress(opj_common_ptr cinfo);
381 Destroy a J2K decompressor handle
382 @param j2k J2K decompressor handle to destroy
384 void j2k_destroy_decompress(opj_j2k_t *j2k);
386 Setup the decoder decoding parameters using user parameters.
387 Decoding parameters are returned in j2k->cp.
388 @param j2k J2K decompressor handle
389 @param parameters decompression parameters
391 void j2k_setup_decoder(opj_j2k_t *j2k, opj_dparameters_t *parameters);
393 Decode an image from a JPEG-2000 codestream
394 @param j2k J2K decompressor handle
395 @param cio Input buffer stream
396 @param cstr_info Codestream information structure if required, NULL otherwise
397 @return Returns a decoded image if successful, returns NULL otherwise
399 opj_image_t* j2k_decode(opj_j2k_t *j2k, opj_cio_t *cio, opj_codestream_info_t *cstr_info);
401 Decode an image form a JPT-stream (JPEG 2000, JPIP)
402 @param j2k J2K decompressor handle
403 @param cio Input buffer stream
404 @param cstr_info Codestream information structure if required, NULL otherwise
405 @return Returns a decoded image if successful, returns NULL otherwise
407 opj_image_t* j2k_decode_jpt_stream(opj_j2k_t *j2k, opj_cio_t *cio, opj_codestream_info_t *cstr_info);
409 Creates a J2K compression structure
410 @param cinfo Codec context info
411 @return Returns a handle to a J2K compressor if successful, returns NULL otherwise
413 opj_j2k_t* j2k_create_compress(opj_common_ptr cinfo);
415 Destroy a J2K compressor handle
416 @param j2k J2K compressor handle to destroy
418 void j2k_destroy_compress(opj_j2k_t *j2k);
420 Setup the encoder parameters using the current image and using user parameters.
421 Coding parameters are returned in j2k->cp.
422 @param j2k J2K compressor handle
423 @param parameters compression parameters
424 @param image input filled image
426 void j2k_setup_encoder(opj_j2k_t *j2k, opj_cparameters_t *parameters, opj_image_t *image);
428 Converts an enum type progression order to string type
430 char *j2k_convert_progression_order(OPJ_PROG_ORDER prg_order);
432 Encode an image into a JPEG-2000 codestream
433 @param j2k J2K compressor handle
434 @param cio Output buffer stream
435 @param image Image to encode
436 @param cstr_info Codestream information structure if required, NULL otherwise
437 @return Returns true if successful, returns false otherwise
439 opj_bool j2k_encode(opj_j2k_t *j2k, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info);
441 /* ----------------------------------------------------------------------- */