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8 * Copyright (c) 2002-2014, Professor Benoit Macq
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10 * Copyright (c) 2002-2003, Yannick Verschueren
11 * Copyright (c) 2003-2007, Francois-Olivier Devaux
12 * Copyright (c) 2003-2014, Antonin Descampe
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44 @brief Implementation of a tile coder/decoder (TCD)
46 The functions in TCD.C encode or decode each tile independently from
47 each other. The functions in TCD.C are used by other functions in J2K.C.
50 /** @defgroup TCD TCD - Implementation of a tile coder/decoder */
57 typedef struct opj_tcd_pass {
59 OPJ_FLOAT64 distortiondec;
61 OPJ_BITFIELD term : 1;
67 typedef struct opj_tcd_layer {
68 OPJ_UINT32 numpasses; /* Number of passes in the layer */
69 OPJ_UINT32 len; /* len of information */
70 OPJ_FLOAT64 disto; /* add for index (Cfr. Marcela) */
71 OPJ_BYTE *data; /* data */
77 typedef struct opj_tcd_cblk_enc {
78 OPJ_BYTE* data; /* Data */
79 opj_tcd_layer_t* layers; /* layer information */
80 opj_tcd_pass_t* passes; /* information about the passes */
82 y1; /* dimension of the code-blocks : left upper corner (x0, y0) right low corner (x1,y1) */
84 OPJ_UINT32 numlenbits;
85 OPJ_UINT32 data_size; /* Size of allocated data buffer */
87 numpasses; /* number of pass already done for the code-blocks */
88 OPJ_UINT32 numpassesinlayers; /* number of passes in the layer */
89 OPJ_UINT32 totalpasses; /* total number of passes */
93 /** Chunk of codestream data that is part of a code block */
94 typedef struct opj_tcd_seg_data_chunk {
95 /* 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 */
99 OPJ_UINT32 len; /* Usable length of data */
100 } opj_tcd_seg_data_chunk_t;
102 /** Segment of a code-block.
103 * A segment represent a number of consecutive coding passes, without termination
104 * of MQC or RAW between them. */
105 typedef struct opj_tcd_seg {
106 OPJ_UINT32 len; /* Size of data related to this segment */
107 /* Number of passes decoded. Including those that we skip */
108 OPJ_UINT32 numpasses;
109 /* Number of passes actually to be decoded. To be used for code-block decoding */
110 OPJ_UINT32 real_num_passes;
111 /* Maximum number of passes for this segment */
112 OPJ_UINT32 maxpasses;
113 /* Number of new passes for current packed. Transitory value */
114 OPJ_UINT32 numnewpasses;
115 /* 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_tcd_seg_data_chunk_t* chunks; /* Array of chunks */
123 /* position of the code-blocks : left upper corner (x0, y0) right low corner (x1,y1) */
124 OPJ_INT32 x0, y0, x1, y1;
125 /* Mb is The maximum number of bit-planes available for the representation of
126 coefficients in any sub-band, b, as defined in Equation (E-2). See
127 Section B.10.5 of the standard */
128 OPJ_UINT32 Mb; /* currently used only to check if HT decoding is correct */
129 /* numbps is Mb - P as defined in Section B.10.5 of the standard */
131 /* number of bits for len, for the current packet. Transitory value */
132 OPJ_UINT32 numlenbits;
133 /* number of pass added to the code-blocks, for the current packet. Transitory value */
134 OPJ_UINT32 numnewpasses;
135 /* number of segments, including those of packet we skip */
137 /* number of segments, to be used for code block decoding */
138 OPJ_UINT32 real_num_segs;
139 OPJ_UINT32 m_current_max_segs; /* allocated number of segs[] items */
140 OPJ_UINT32 numchunks; /* Number of valid chunks items */
141 OPJ_UINT32 numchunksalloc; /* Number of chunks item allocated */
142 /* Decoded code-block. Only used for subtile decoding. Otherwise tilec->data is directly updated */
143 OPJ_INT32* decoded_data;
144 } opj_tcd_cblk_dec_t;
146 /** Precinct structure */
147 typedef struct opj_tcd_precinct {
148 /* dimension of the precinct : left upper corner (x0, y0) right low corner (x1,y1) */
149 OPJ_INT32 x0, y0, x1, y1;
150 OPJ_UINT32 cw, ch; /* number of code-blocks, in width and height */
151 union { /* code-blocks information */
152 opj_tcd_cblk_enc_t* enc;
153 opj_tcd_cblk_dec_t* dec;
156 OPJ_UINT32 block_size; /* size taken by cblks (in bytes) */
157 opj_tgt_tree_t *incltree; /* inclusion tree */
158 opj_tgt_tree_t *imsbtree; /* IMSB tree */
159 } opj_tcd_precinct_t;
161 /** Sub-band structure */
162 typedef struct opj_tcd_band {
163 /* dimension of the subband : left upper corner (x0, y0) right low corner (x1,y1) */
164 OPJ_INT32 x0, y0, x1, y1;
165 /* band number: for lowest resolution level (0=LL), otherwise (1=HL, 2=LH, 3=HH) */
167 /* precinct information */
168 opj_tcd_precinct_t *precincts;
169 /* size of data taken by precincts */
170 OPJ_UINT32 precincts_data_size;
172 OPJ_FLOAT32 stepsize;
175 /** Tile-component resolution structure */
176 typedef struct opj_tcd_resolution {
177 /* dimension of the resolution level : left upper corner (x0, y0) right low corner (x1,y1) */
178 OPJ_INT32 x0, y0, x1, y1;
179 /* number of precincts, in width and height, for this resolution level */
181 /* number of sub-bands for the resolution level (1 for lowest resolution level, 3 otherwise) */
183 /* subband information */
184 opj_tcd_band_t bands[3];
186 /* dimension of the resolution limited to window of interest. Only valid if tcd->whole_tile_decoding is set */
191 } opj_tcd_resolution_t;
193 /** Tile-component structure */
194 typedef struct opj_tcd_tilecomp {
195 /* dimension of component : left upper corner (x0, y0) right low corner (x1,y1) */
196 OPJ_INT32 x0, y0, x1, y1;
197 /* component number */
199 /* number of resolutions level */
200 OPJ_UINT32 numresolutions;
201 /* number of resolutions level to decode (at max)*/
202 OPJ_UINT32 minimum_num_resolutions;
203 /* resolutions information */
204 opj_tcd_resolution_t *resolutions;
205 /* size of data for resolutions (in bytes) */
206 OPJ_UINT32 resolutions_size;
208 /* data of the component. For decoding, only valid if tcd->whole_tile_decoding is set (so exclusive of data_win member) */
210 /* if true, then need to free after usage, otherwise do not free */
212 /* we may either need to allocate this amount of data, or re-use image data and ignore this value */
213 size_t data_size_needed;
214 /* size of the data of the component */
217 /** data of the component limited to window of interest. Only valid for decoding and if tcd->whole_tile_decoding is NOT set (so exclusive of data member) */
219 /* dimension of the component limited to window of interest. Only valid for decoding and if tcd->whole_tile_decoding is NOT set */
225 /* number of pixels */
227 } opj_tcd_tilecomp_t;
233 typedef struct opj_tcd_tile {
234 /* dimension of the tile : left upper corner (x0, y0) right low corner (x1,y1) */
235 OPJ_INT32 x0, y0, x1, y1;
236 OPJ_UINT32 numcomps; /* number of components in tile */
237 opj_tcd_tilecomp_t *comps; /* Components information */
238 OPJ_SIZE_T numpix; /* number of pixels */
239 OPJ_FLOAT64 distotile; /* distortion of the tile */
240 OPJ_FLOAT64 distolayer[100]; /* distortion per layer */
241 OPJ_UINT32 packno; /* packet number */
247 typedef struct opj_tcd_image {
248 opj_tcd_tile_t *tiles; /* Tiles information */
256 typedef struct opj_tcd {
257 /** Position of the tilepart flag in Progression order*/
259 /** Tile part number*/
261 /** Current tile part number*/
262 OPJ_UINT32 cur_tp_num;
263 /** Total number of tileparts of the current tile*/
264 OPJ_UINT32 cur_totnum_tp;
265 /** Current Packet iterator number */
267 /** info on each image tile */
268 opj_tcd_image_t *tcd_image;
271 /** coding parameters */
273 /** coding/decoding parameters common to all tiles */
275 /** current encoded/decoded tile */
276 OPJ_UINT32 tcd_tileno;
277 /** tell if the tcd is a decoder. */
278 OPJ_BITFIELD m_is_decoder : 1;
280 opj_thread_pool_t* thread_pool;
281 /** Coordinates of the window of interest, in grid reference space */
286 /** Only valid for decoding. Whether the whole tile is decoded, or just the region in win_x0/win_y0/win_x1/win_y1 */
287 OPJ_BOOL whole_tile_decoding;
288 /* Array of size image->numcomps indicating if a component must be decoded. NULL if all components must be decoded */
289 OPJ_BOOL* used_component;
293 * Structure to hold information needed to generate some markers.
296 typedef struct opj_tcd_marker_info {
297 /** In: Whether information to generate PLT markers in needed */
300 /** OUT: Number of elements in p_packet_size[] array */
301 OPJ_UINT32 packet_count;
303 /** OUT: Array of size packet_count, such that p_packet_size[i] is
304 * the size in bytes of the ith packet */
305 OPJ_UINT32* p_packet_size;
306 } opj_tcd_marker_info_t;
308 /** @name Exported functions */
310 /* ----------------------------------------------------------------------- */
313 Dump the content of a tcd structure
315 /*void tcd_dump(FILE *fd, opj_tcd_t *tcd, opj_tcd_image_t *img);*/ /* TODO MSD should use the new v2 structures */
318 Create a new TCD handle
319 @param p_is_decoder FIXME DOC
320 @return Returns a new TCD handle if successful returns NULL otherwise
322 opj_tcd_t* opj_tcd_create(OPJ_BOOL p_is_decoder);
325 Destroy a previously created TCD handle
326 @param tcd TCD handle to destroy
328 void opj_tcd_destroy(opj_tcd_t *tcd);
332 * Create a new opj_tcd_marker_info_t* structure
333 * @param need_PLT Whether information is needed to generate PLT markers.
335 opj_tcd_marker_info_t* opj_tcd_marker_info_create(OPJ_BOOL need_PLT);
339 Destroy a previously created opj_tcd_marker_info_t* structure
340 @param p_tcd_marker_info Structure to destroy
342 void opj_tcd_marker_info_destroy(opj_tcd_marker_info_t *p_tcd_marker_info);
346 * Initialize the tile coder and may reuse some memory.
347 * @param p_tcd TCD handle.
348 * @param p_image raw image.
349 * @param p_cp coding parameters.
350 * @param p_tp thread pool
352 * @return true if the encoding values could be set (false otherwise).
354 OPJ_BOOL opj_tcd_init(opj_tcd_t *p_tcd,
355 opj_image_t * p_image,
357 opj_thread_pool_t* p_tp);
360 * Allocates memory for decoding a specific tile.
362 * @param p_tcd the tile decoder.
363 * @param p_tile_no the index of the tile received in sequence. This not necessarily lead to the
364 * tile at index p_tile_no.
365 * @param p_manager the event manager.
367 * @return true if the remaining data is sufficient.
369 OPJ_BOOL opj_tcd_init_decode_tile(opj_tcd_t *p_tcd, OPJ_UINT32 p_tile_no,
370 opj_event_mgr_t* p_manager);
373 * Gets the maximum tile size that will be taken by the tile once decoded.
375 OPJ_UINT32 opj_tcd_get_decoded_tile_size(opj_tcd_t *p_tcd,
376 OPJ_BOOL take_into_account_partial_decoding);
379 * Encodes a tile from the raw image into the given buffer.
380 * @param p_tcd Tile Coder handle
381 * @param p_tile_no Index of the tile to encode.
382 * @param p_dest Destination buffer
383 * @param p_data_written pointer to an int that is incremented by the number of bytes really written on p_dest
384 * @param p_len Maximum length of the destination buffer
385 * @param p_cstr_info Codestream information structure
386 * @param p_marker_info Marker information structure
387 * @param p_manager the user event manager
388 * @return true if the coding is successful.
390 OPJ_BOOL opj_tcd_encode_tile(opj_tcd_t *p_tcd,
391 OPJ_UINT32 p_tile_no,
393 OPJ_UINT32 * p_data_written,
395 struct opj_codestream_info *p_cstr_info,
396 opj_tcd_marker_info_t* p_marker_info,
397 opj_event_mgr_t *p_manager);
401 Decode a tile from a buffer into a raw image
402 @param tcd TCD handle
403 @param win_x0 Upper left x of region to decode (in grid coordinates)
404 @param win_y0 Upper left y of region to decode (in grid coordinates)
405 @param win_x1 Lower right x of region to decode (in grid coordinates)
406 @param win_y1 Lower right y of region to decode (in grid coordinates)
407 @param numcomps_to_decode Size of the comps_indices array, or 0 if decoding all components.
408 @param comps_indices Array of numcomps values representing the indices
409 of the components to decode (relative to the
410 codestream, starting at 0). Or NULL if decoding all components.
411 @param src Source buffer
412 @param len Length of source buffer
413 @param tileno Number that identifies one of the tiles to be decoded
414 @param cstr_info FIXME DOC
415 @param manager the event manager.
417 OPJ_BOOL opj_tcd_decode_tile(opj_tcd_t *tcd,
422 OPJ_UINT32 numcomps_to_decode,
423 const OPJ_UINT32 *comps_indices,
427 opj_codestream_index_t *cstr_info,
428 opj_event_mgr_t *manager);
432 * Copies tile data from the system onto the given memory block.
434 OPJ_BOOL opj_tcd_update_tile_data(opj_tcd_t *p_tcd,
436 OPJ_UINT32 p_dest_length);
439 * Get the size in bytes of the input buffer provided before encoded.
440 * This must be the size provided to the p_src_length argument of
441 * opj_tcd_copy_tile_data()
443 OPJ_SIZE_T opj_tcd_get_encoder_input_buffer_size(opj_tcd_t *p_tcd);
446 * Initialize the tile coder and may reuse some memory.
448 * @param p_tcd TCD handle.
449 * @param p_tile_no current tile index to encode.
450 * @param p_manager the event manager.
452 * @return true if the encoding values could be set (false otherwise).
454 OPJ_BOOL opj_tcd_init_encode_tile(opj_tcd_t *p_tcd,
455 OPJ_UINT32 p_tile_no, opj_event_mgr_t* p_manager);
458 * Copies tile data from the given memory block onto the system.
460 * p_src_length must be equal to opj_tcd_get_encoder_input_buffer_size()
462 OPJ_BOOL opj_tcd_copy_tile_data(opj_tcd_t *p_tcd,
464 OPJ_SIZE_T p_src_length);
467 * Allocates tile component data
471 OPJ_BOOL opj_alloc_tile_component_data(opj_tcd_tilecomp_t *l_tilec);
473 /** Returns whether a sub-band is empty (i.e. whether it has a null area)
474 * @param band Sub-band handle.
475 * @return OPJ_TRUE whether the sub-band is empty.
477 OPJ_BOOL opj_tcd_is_band_empty(opj_tcd_band_t* band);
479 /** Reinitialize a segment */
480 void opj_tcd_reinit_segment(opj_tcd_seg_t* seg);
483 /** Returns whether a sub-band region contributes to the area of interest
484 * tcd->win_x0,tcd->win_y0,tcd->win_x1,tcd->win_y1.
486 * @param tcd TCD handle.
487 * @param compno Component number
488 * @param resno Resolution number
489 * @param bandno Band number (*not* band index, ie 0, 1, 2 or 3)
490 * @param x0 Upper left x in subband coordinates
491 * @param y0 Upper left y in subband coordinates
492 * @param x1 Lower right x in subband coordinates
493 * @param y1 Lower right y in subband coordinates
494 * @return OPJ_TRUE whether the sub-band region contributes to the area of
497 OPJ_BOOL opj_tcd_is_subband_area_of_interest(opj_tcd_t *tcd,
506 /* ----------------------------------------------------------------------- */
511 #endif /* OPJ_TCD_H */