2 * The copyright in this software is being made available under the 2-clauses
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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) 2008, 2011-2012, Centre National d'Etudes Spatiales (CNES), FR
15 * Copyright (c) 2012, CS Systemes d'Information, France
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43 @brief Implementation of a tile coder/decoder (TCD)
45 The functions in TCD.C encode or decode each tile independently from
46 each other. The functions in TCD.C are used by other functions in J2K.C.
49 /** @defgroup TCD TCD - Implementation of a tile coder/decoder */
56 typedef struct opj_tcd_pass {
58 OPJ_FLOAT64 distortiondec;
60 OPJ_BITFIELD term : 1;
66 typedef struct opj_tcd_layer {
67 OPJ_UINT32 numpasses; /* Number of passes in the layer */
68 OPJ_UINT32 len; /* len of information */
69 OPJ_FLOAT64 disto; /* add for index (Cfr. Marcela) */
70 OPJ_BYTE *data; /* data */
76 typedef struct opj_tcd_cblk_enc {
77 OPJ_BYTE* data; /* Data */
78 opj_tcd_layer_t* layers; /* layer information */
79 opj_tcd_pass_t* passes; /* information about the passes */
81 y1; /* dimension of the code-blocks : left upper corner (x0, y0) right low corner (x1,y1) */
83 OPJ_UINT32 numlenbits;
84 OPJ_UINT32 data_size; /* Size of allocated data buffer */
86 numpasses; /* number of pass already done for the code-blocks */
87 OPJ_UINT32 numpassesinlayers; /* number of passes in the layer */
88 OPJ_UINT32 totalpasses; /* total number of passes */
92 /** Chunk of codestream data that is part of a T1 segment */
93 typedef struct opj_tcd_seg_data_chunk {
95 data; /* Point to tilepart buffer. We don't make a copy !
96 So the tilepart buffer must be kept alive
97 as long as we need to decode the codeblocks */
98 OPJ_UINT32 len; /* Usable length of data */
99 } opj_tcd_seg_data_chunk_t;
101 /** Segment of a code-block.
102 * A segment represent a number of consecutive coding passes, without termination
103 * of MQC or RAW between them. */
104 typedef struct opj_tcd_seg {
105 opj_tcd_seg_data_chunk_t* chunks; /* Array of chunks */
106 OPJ_UINT32 numchunks; /* Number of valid chunks items */
107 OPJ_UINT32 numchunksalloc; /* Number of chunks item allocated */
109 numpasses; /* Number of passes decoded. Including those that we skip */
111 real_num_passes; /* Number of passes actually to be decoded. To be used for code-block decoding */
112 OPJ_UINT32 maxpasses; /* Maximum number of passes for this segment */
114 numnewpasses; /* Number of new passes for current packed. Transitory value */
116 newlen; /* Codestream length for this segment for current packed. Transitory value */
119 /* Code-block for decoding */
120 typedef struct opj_tcd_cblk_dec {
121 opj_tcd_seg_t* segs; /* segments information */
122 OPJ_INT32 x0, y0, x1,
123 y1; /* position of the code-blocks : left upper corner (x0, y0) right low corner (x1,y1) */
126 numlenbits; /* number of bits for len,, for the current packet. Transitory value */
128 numnewpasses; /* number of pass added to the code-blocks, for the current packet. Transitory value */
130 numsegs; /* number of segments, including those of packet we skip */
132 real_num_segs; /* number of segments, to be used for code block decoding */
133 OPJ_UINT32 m_current_max_segs; /* allocated number of segs[] items */
134 } opj_tcd_cblk_dec_t;
139 typedef struct opj_tcd_precinct {
140 OPJ_INT32 x0, y0, x1,
141 y1; /* dimension of the precinct : left upper corner (x0, y0) right low corner (x1,y1) */
142 OPJ_UINT32 cw, ch; /* number of precinct in width and height */
143 union { /* code-blocks information */
144 opj_tcd_cblk_enc_t* enc;
145 opj_tcd_cblk_dec_t* dec;
148 OPJ_UINT32 block_size; /* size taken by cblks (in bytes) */
149 opj_tgt_tree_t *incltree; /* inclusion tree */
150 opj_tgt_tree_t *imsbtree; /* IMSB tree */
151 } opj_tcd_precinct_t;
156 typedef struct opj_tcd_band {
157 OPJ_INT32 x0, y0, x1,
158 y1; /* dimension of the subband : left upper corner (x0, y0) right low corner (x1,y1) */
160 opj_tcd_precinct_t *precincts; /* precinct information */
161 OPJ_UINT32 precincts_data_size; /* size of data taken by precincts */
163 OPJ_FLOAT32 stepsize;
169 typedef struct opj_tcd_resolution {
170 OPJ_INT32 x0, y0, x1,
171 y1; /* dimension of the resolution level : left upper corner (x0, y0) right low corner (x1,y1) */
173 OPJ_UINT32 numbands; /* number sub-band for the resolution level */
174 opj_tcd_band_t bands[3]; /* subband information */
175 } opj_tcd_resolution_t;
180 typedef struct opj_tcd_tilecomp {
181 OPJ_INT32 x0, y0, x1,
182 y1; /* dimension of component : left upper corner (x0, y0) right low corner (x1,y1) */
183 OPJ_UINT32 numresolutions; /* number of resolutions level */
185 minimum_num_resolutions; /* number of resolutions level to decode (at max)*/
186 opj_tcd_resolution_t *resolutions; /* resolutions information */
188 resolutions_size; /* size of data for resolutions (in bytes) */
189 OPJ_INT32 *data; /* data of the component */
190 OPJ_BOOL ownsData; /* if true, then need to free after usage, otherwise do not free */
192 data_size_needed; /* we may either need to allocate this amount of data, or re-use image data and ignore this value */
193 OPJ_UINT32 data_size; /* size of the data of the component */
194 OPJ_INT32 numpix; /* add fixed_quality */
195 } opj_tcd_tilecomp_t;
201 typedef struct opj_tcd_tile {
202 OPJ_INT32 x0, y0, x1,
203 y1; /* dimension of the tile : left upper corner (x0, y0) right low corner (x1,y1) */
204 OPJ_UINT32 numcomps; /* number of components in tile */
205 opj_tcd_tilecomp_t *comps; /* Components information */
206 OPJ_INT32 numpix; /* add fixed_quality */
207 OPJ_FLOAT64 distotile; /* add fixed_quality */
208 OPJ_FLOAT64 distolayer[100]; /* add fixed_quality */
209 OPJ_UINT32 packno; /* packet number */
215 typedef struct opj_tcd_image {
216 opj_tcd_tile_t *tiles; /* Tiles information */
224 typedef struct opj_tcd {
225 /** Position of the tilepart flag in Progression order*/
227 /** Tile part number*/
229 /** Current tile part number*/
230 OPJ_UINT32 cur_tp_num;
231 /** Total number of tileparts of the current tile*/
232 OPJ_UINT32 cur_totnum_tp;
233 /** Current Packet iterator number */
235 /** info on each image tile */
236 opj_tcd_image_t *tcd_image;
239 /** coding parameters */
241 /** coding/decoding parameters common to all tiles */
243 /** current encoded/decoded tile */
244 OPJ_UINT32 tcd_tileno;
245 /** tell if the tcd is a decoder. */
246 OPJ_BITFIELD m_is_decoder : 1;
248 opj_thread_pool_t* thread_pool;
251 /** @name Exported functions */
253 /* ----------------------------------------------------------------------- */
256 Dump the content of a tcd structure
258 /*void tcd_dump(FILE *fd, opj_tcd_t *tcd, opj_tcd_image_t *img);*/ /* TODO MSD shoul use the new v2 structures */
261 Create a new TCD handle
262 @param p_is_decoder FIXME DOC
263 @return Returns a new TCD handle if successful returns NULL otherwise
265 opj_tcd_t* opj_tcd_create(OPJ_BOOL p_is_decoder);
268 Destroy a previously created TCD handle
269 @param tcd TCD handle to destroy
271 void opj_tcd_destroy(opj_tcd_t *tcd);
274 * Initialize the tile coder and may reuse some memory.
275 * @param p_tcd TCD handle.
276 * @param p_image raw image.
277 * @param p_cp coding parameters.
278 * @param p_tp thread pool
280 * @return true if the encoding values could be set (false otherwise).
282 OPJ_BOOL opj_tcd_init(opj_tcd_t *p_tcd,
283 opj_image_t * p_image,
285 opj_thread_pool_t* p_tp);
288 * Allocates memory for decoding a specific tile.
290 * @param p_tcd the tile decoder.
291 * @param p_tile_no the index of the tile received in sequence. This not necessarily lead to the
292 * tile at index p_tile_no.
293 * @param p_manager the event manager.
295 * @return true if the remaining data is sufficient.
297 OPJ_BOOL opj_tcd_init_decode_tile(opj_tcd_t *p_tcd, OPJ_UINT32 p_tile_no,
298 opj_event_mgr_t* p_manager);
300 void opj_tcd_makelayer_fixed(opj_tcd_t *tcd, OPJ_UINT32 layno,
303 void opj_tcd_rateallocate_fixed(opj_tcd_t *tcd);
305 void opj_tcd_makelayer(opj_tcd_t *tcd,
310 OPJ_BOOL opj_tcd_rateallocate(opj_tcd_t *tcd,
312 OPJ_UINT32 * p_data_written,
314 opj_codestream_info_t *cstr_info);
317 * Gets the maximum tile size that will be taken by the tile once decoded.
319 OPJ_UINT32 opj_tcd_get_decoded_tile_size(opj_tcd_t *p_tcd);
322 * Encodes a tile from the raw image into the given buffer.
323 * @param p_tcd Tile Coder handle
324 * @param p_tile_no Index of the tile to encode.
325 * @param p_dest Destination buffer
326 * @param p_data_written pointer to an int that is incremented by the number of bytes really written on p_dest
327 * @param p_len Maximum length of the destination buffer
328 * @param p_cstr_info Codestream information structure
329 * @return true if the coding is successful.
331 OPJ_BOOL opj_tcd_encode_tile(opj_tcd_t *p_tcd,
332 OPJ_UINT32 p_tile_no,
334 OPJ_UINT32 * p_data_written,
336 struct opj_codestream_info *p_cstr_info);
340 Decode a tile from a buffer into a raw image
341 @param tcd TCD handle
342 @param src Source buffer
343 @param len Length of source buffer
344 @param tileno Number that identifies one of the tiles to be decoded
345 @param cstr_info FIXME DOC
346 @param manager the event manager.
348 OPJ_BOOL opj_tcd_decode_tile(opj_tcd_t *tcd,
352 opj_codestream_index_t *cstr_info,
353 opj_event_mgr_t *manager);
357 * Copies tile data from the system onto the given memory block.
359 OPJ_BOOL opj_tcd_update_tile_data(opj_tcd_t *p_tcd,
361 OPJ_UINT32 p_dest_length);
366 OPJ_UINT32 opj_tcd_get_encoded_tile_size(opj_tcd_t *p_tcd);
369 * Initialize the tile coder and may reuse some meory.
371 * @param p_tcd TCD handle.
372 * @param p_tile_no current tile index to encode.
373 * @param p_manager the event manager.
375 * @return true if the encoding values could be set (false otherwise).
377 OPJ_BOOL opj_tcd_init_encode_tile(opj_tcd_t *p_tcd,
378 OPJ_UINT32 p_tile_no, opj_event_mgr_t* p_manager);
381 * Copies tile data from the given memory block onto the system.
383 OPJ_BOOL opj_tcd_copy_tile_data(opj_tcd_t *p_tcd,
385 OPJ_UINT32 p_src_length);
388 * Allocates tile component data
392 OPJ_BOOL opj_alloc_tile_component_data(opj_tcd_tilecomp_t *l_tilec);
394 /** Returns whether a sub-band is empty (i.e. whether it has a null area)
395 * @param band Sub-band handle.
396 * @return OPJ_TRUE whether the sub-band is empty.
398 OPJ_BOOL opj_tcd_is_band_empty(opj_tcd_band_t* band);
400 /** Reinitialize a segment, without deallocating its chunks array */
401 void opj_tcd_reinit_segment(opj_tcd_seg_t* seg);
403 /* ----------------------------------------------------------------------- */
408 #endif /* OPJ_TCD_H */