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author | dan miller | 2007-10-18 08:29:49 +0000 |
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committer | dan miller | 2007-10-18 08:29:49 +0000 |
commit | cc07c64bdef46f4d25c2203e874f91ee94583f56 (patch) | |
tree | 004c68e8d8813ff1addfd9749e3dbdc6ff4432a9 /libraries/openjpeg-libsl/libopenjpeg/jp2.c | |
parent | hmm... trying again to get everything committed (diff) | |
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one more time
Diffstat (limited to 'libraries/openjpeg-libsl/libopenjpeg/jp2.c')
-rw-r--r-- | libraries/openjpeg-libsl/libopenjpeg/jp2.c | 700 |
1 files changed, 700 insertions, 0 deletions
diff --git a/libraries/openjpeg-libsl/libopenjpeg/jp2.c b/libraries/openjpeg-libsl/libopenjpeg/jp2.c new file mode 100644 index 0000000..d102349 --- /dev/null +++ b/libraries/openjpeg-libsl/libopenjpeg/jp2.c | |||
@@ -0,0 +1,700 @@ | |||
1 | /* | ||
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 | * All rights reserved. | ||
9 | * | ||
10 | * Redistribution and use in source and binary forms, with or without | ||
11 | * modification, are permitted provided that the following conditions | ||
12 | * are met: | ||
13 | * 1. Redistributions of source code must retain the above copyright | ||
14 | * notice, this list of conditions and the following disclaimer. | ||
15 | * 2. Redistributions in binary form must reproduce the above copyright | ||
16 | * notice, this list of conditions and the following disclaimer in the | ||
17 | * documentation and/or other materials provided with the distribution. | ||
18 | * | ||
19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' | ||
20 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | ||
21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | ||
22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | ||
23 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | ||
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | ||
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | ||
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | ||
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | ||
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | ||
29 | * POSSIBILITY OF SUCH DAMAGE. | ||
30 | */ | ||
31 | |||
32 | #include "opj_includes.h" | ||
33 | |||
34 | /** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */ | ||
35 | /*@{*/ | ||
36 | |||
37 | /** @name Local static functions */ | ||
38 | /*@{*/ | ||
39 | |||
40 | /** | ||
41 | Read box headers | ||
42 | @param cinfo Codec context info | ||
43 | @param cio Input stream | ||
44 | @param box | ||
45 | @return Returns true if successful, returns false otherwise | ||
46 | */ | ||
47 | static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box); | ||
48 | /*static void jp2_write_url(opj_cio_t *cio, char *Idx_file);*/ | ||
49 | /** | ||
50 | Read the IHDR box - Image Header box | ||
51 | @param jp2 JP2 handle | ||
52 | @param cio Input buffer stream | ||
53 | @return Returns true if successful, returns false otherwise | ||
54 | */ | ||
55 | static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio); | ||
56 | static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio); | ||
57 | static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio); | ||
58 | static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio); | ||
59 | static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio); | ||
60 | static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio); | ||
61 | /** | ||
62 | Write the FTYP box - File type box | ||
63 | @param jp2 JP2 handle | ||
64 | @param cio Output buffer stream | ||
65 | */ | ||
66 | static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio); | ||
67 | /** | ||
68 | Read the FTYP box - File type box | ||
69 | @param jp2 JP2 handle | ||
70 | @param cio Input buffer stream | ||
71 | @return Returns true if successful, returns false otherwise | ||
72 | */ | ||
73 | static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio); | ||
74 | static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, char *index); | ||
75 | static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset); | ||
76 | static void jp2_write_jp(opj_cio_t *cio); | ||
77 | /** | ||
78 | Read the JP box - JPEG 2000 signature | ||
79 | @param jp2 JP2 handle | ||
80 | @param cio Input buffer stream | ||
81 | @return Returns true if successful, returns false otherwise | ||
82 | */ | ||
83 | static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio); | ||
84 | /** | ||
85 | Decode the structure of a JP2 file | ||
86 | @param jp2 JP2 handle | ||
87 | @param cio Input buffer stream | ||
88 | @return Returns true if successful, returns false otherwise | ||
89 | */ | ||
90 | static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio); | ||
91 | |||
92 | /*@}*/ | ||
93 | |||
94 | /*@}*/ | ||
95 | |||
96 | /* ----------------------------------------------------------------------- */ | ||
97 | |||
98 | static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box) { | ||
99 | box->init_pos = cio_tell(cio); | ||
100 | box->length = cio_read(cio, 4); | ||
101 | box->type = cio_read(cio, 4); | ||
102 | if (box->length == 1) { | ||
103 | if (cio_read(cio, 4) != 0) { | ||
104 | opj_event_msg(cinfo, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n"); | ||
105 | return false; | ||
106 | } | ||
107 | box->length = cio_read(cio, 4); | ||
108 | if (box->length == 0) | ||
109 | box->length = cio_numbytesleft(cio) + 12; | ||
110 | } | ||
111 | else if (box->length == 0) { | ||
112 | box->length = cio_numbytesleft(cio) + 8; | ||
113 | } | ||
114 | |||
115 | return true; | ||
116 | } | ||
117 | |||
118 | #if 0 | ||
119 | static void jp2_write_url(opj_cio_t *cio, char *Idx_file) { | ||
120 | unsigned int i; | ||
121 | opj_jp2_box_t box; | ||
122 | |||
123 | box.init_pos = cio_tell(cio); | ||
124 | cio_skip(cio, 4); | ||
125 | cio_write(cio, JP2_URL, 4); /* DBTL */ | ||
126 | cio_write(cio, 0, 1); /* VERS */ | ||
127 | cio_write(cio, 0, 3); /* FLAG */ | ||
128 | |||
129 | if(Idx_file) { | ||
130 | for (i = 0; i < strlen(Idx_file); i++) { | ||
131 | cio_write(cio, Idx_file[i], 1); | ||
132 | } | ||
133 | } | ||
134 | |||
135 | box.length = cio_tell(cio) - box.init_pos; | ||
136 | cio_seek(cio, box.init_pos); | ||
137 | cio_write(cio, box.length, 4); /* L */ | ||
138 | cio_seek(cio, box.init_pos + box.length); | ||
139 | } | ||
140 | #endif | ||
141 | |||
142 | static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
143 | opj_jp2_box_t box; | ||
144 | |||
145 | opj_common_ptr cinfo = jp2->cinfo; | ||
146 | |||
147 | jp2_read_boxhdr(cinfo, cio, &box); | ||
148 | if (JP2_IHDR != box.type) { | ||
149 | opj_event_msg(cinfo, EVT_ERROR, "Expected IHDR Marker\n"); | ||
150 | return false; | ||
151 | } | ||
152 | |||
153 | jp2->h = cio_read(cio, 4); /* HEIGHT */ | ||
154 | jp2->w = cio_read(cio, 4); /* WIDTH */ | ||
155 | jp2->numcomps = cio_read(cio, 2); /* NC */ | ||
156 | jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t)); | ||
157 | |||
158 | jp2->bpc = cio_read(cio, 1); /* BPC */ | ||
159 | |||
160 | jp2->C = cio_read(cio, 1); /* C */ | ||
161 | jp2->UnkC = cio_read(cio, 1); /* UnkC */ | ||
162 | jp2->IPR = cio_read(cio, 1); /* IPR */ | ||
163 | |||
164 | if (cio_tell(cio) - box.init_pos != box.length) { | ||
165 | opj_event_msg(cinfo, EVT_ERROR, "Error with IHDR Box\n"); | ||
166 | return false; | ||
167 | } | ||
168 | |||
169 | return true; | ||
170 | } | ||
171 | |||
172 | static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
173 | opj_jp2_box_t box; | ||
174 | |||
175 | box.init_pos = cio_tell(cio); | ||
176 | cio_skip(cio, 4); | ||
177 | cio_write(cio, JP2_IHDR, 4); /* IHDR */ | ||
178 | |||
179 | cio_write(cio, jp2->h, 4); /* HEIGHT */ | ||
180 | cio_write(cio, jp2->w, 4); /* WIDTH */ | ||
181 | cio_write(cio, jp2->numcomps, 2); /* NC */ | ||
182 | |||
183 | cio_write(cio, jp2->bpc, 1); /* BPC */ | ||
184 | |||
185 | cio_write(cio, jp2->C, 1); /* C : Always 7 */ | ||
186 | cio_write(cio, jp2->UnkC, 1); /* UnkC, colorspace unknown */ | ||
187 | cio_write(cio, jp2->IPR, 1); /* IPR, no intellectual property */ | ||
188 | |||
189 | box.length = cio_tell(cio) - box.init_pos; | ||
190 | cio_seek(cio, box.init_pos); | ||
191 | cio_write(cio, box.length, 4); /* L */ | ||
192 | cio_seek(cio, box.init_pos + box.length); | ||
193 | } | ||
194 | |||
195 | static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
196 | unsigned int i; | ||
197 | opj_jp2_box_t box; | ||
198 | |||
199 | box.init_pos = cio_tell(cio); | ||
200 | cio_skip(cio, 4); | ||
201 | cio_write(cio, JP2_BPCC, 4); /* BPCC */ | ||
202 | |||
203 | for (i = 0; i < jp2->numcomps; i++) { | ||
204 | cio_write(cio, jp2->comps[i].bpcc, 1); | ||
205 | } | ||
206 | |||
207 | box.length = cio_tell(cio) - box.init_pos; | ||
208 | cio_seek(cio, box.init_pos); | ||
209 | cio_write(cio, box.length, 4); /* L */ | ||
210 | cio_seek(cio, box.init_pos + box.length); | ||
211 | } | ||
212 | |||
213 | |||
214 | static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
215 | unsigned int i; | ||
216 | opj_jp2_box_t box; | ||
217 | |||
218 | opj_common_ptr cinfo = jp2->cinfo; | ||
219 | |||
220 | jp2_read_boxhdr(cinfo, cio, &box); | ||
221 | if (JP2_BPCC != box.type) { | ||
222 | opj_event_msg(cinfo, EVT_ERROR, "Expected BPCC Marker\n"); | ||
223 | return false; | ||
224 | } | ||
225 | |||
226 | for (i = 0; i < jp2->numcomps; i++) { | ||
227 | jp2->comps[i].bpcc = cio_read(cio, 1); | ||
228 | } | ||
229 | |||
230 | if (cio_tell(cio) - box.init_pos != box.length) { | ||
231 | opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n"); | ||
232 | return false; | ||
233 | } | ||
234 | |||
235 | return true; | ||
236 | } | ||
237 | |||
238 | static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
239 | opj_jp2_box_t box; | ||
240 | |||
241 | box.init_pos = cio_tell(cio); | ||
242 | cio_skip(cio, 4); | ||
243 | cio_write(cio, JP2_COLR, 4); /* COLR */ | ||
244 | |||
245 | cio_write(cio, jp2->meth, 1); /* METH */ | ||
246 | cio_write(cio, jp2->precedence, 1); /* PRECEDENCE */ | ||
247 | cio_write(cio, jp2->approx, 1); /* APPROX */ | ||
248 | |||
249 | if (jp2->meth == 1) { | ||
250 | cio_write(cio, jp2->enumcs, 4); /* EnumCS */ | ||
251 | } else { | ||
252 | cio_write(cio, 0, 1); /* PROFILE (??) */ | ||
253 | } | ||
254 | |||
255 | box.length = cio_tell(cio) - box.init_pos; | ||
256 | cio_seek(cio, box.init_pos); | ||
257 | cio_write(cio, box.length, 4); /* L */ | ||
258 | cio_seek(cio, box.init_pos + box.length); | ||
259 | } | ||
260 | |||
261 | static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
262 | opj_jp2_box_t box; | ||
263 | int skip_len; | ||
264 | |||
265 | opj_common_ptr cinfo = jp2->cinfo; | ||
266 | |||
267 | jp2_read_boxhdr(cinfo, cio, &box); | ||
268 | do { | ||
269 | if (JP2_COLR != box.type) { | ||
270 | cio_skip(cio, box.length - 8); | ||
271 | jp2_read_boxhdr(cinfo, cio, &box); | ||
272 | } | ||
273 | } while(JP2_COLR != box.type); | ||
274 | |||
275 | jp2->meth = cio_read(cio, 1); /* METH */ | ||
276 | jp2->precedence = cio_read(cio, 1); /* PRECEDENCE */ | ||
277 | jp2->approx = cio_read(cio, 1); /* APPROX */ | ||
278 | |||
279 | if (jp2->meth == 1) { | ||
280 | jp2->enumcs = cio_read(cio, 4); /* EnumCS */ | ||
281 | } else { | ||
282 | /* skip PROFILE */ | ||
283 | skip_len = box.init_pos + box.length - cio_tell(cio); | ||
284 | if (skip_len < 0) { | ||
285 | opj_event_msg(cinfo, EVT_ERROR, "Error with JP2H box size\n"); | ||
286 | return false; | ||
287 | } | ||
288 | cio_skip(cio, box.init_pos + box.length - cio_tell(cio)); | ||
289 | } | ||
290 | |||
291 | if (cio_tell(cio) - box.init_pos != box.length) { | ||
292 | opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n"); | ||
293 | return false; | ||
294 | } | ||
295 | return true; | ||
296 | } | ||
297 | |||
298 | void jp2_write_jp2h(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
299 | opj_jp2_box_t box; | ||
300 | |||
301 | box.init_pos = cio_tell(cio); | ||
302 | cio_skip(cio, 4); | ||
303 | cio_write(cio, JP2_JP2H, 4); /* JP2H */ | ||
304 | |||
305 | jp2_write_ihdr(jp2, cio); | ||
306 | |||
307 | if (jp2->bpc == 255) { | ||
308 | jp2_write_bpcc(jp2, cio); | ||
309 | } | ||
310 | jp2_write_colr(jp2, cio); | ||
311 | |||
312 | box.length = cio_tell(cio) - box.init_pos; | ||
313 | cio_seek(cio, box.init_pos); | ||
314 | cio_write(cio, box.length, 4); /* L */ | ||
315 | cio_seek(cio, box.init_pos + box.length); | ||
316 | } | ||
317 | |||
318 | bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
319 | opj_jp2_box_t box; | ||
320 | int skip_len; | ||
321 | |||
322 | opj_common_ptr cinfo = jp2->cinfo; | ||
323 | |||
324 | jp2_read_boxhdr(cinfo, cio, &box); | ||
325 | do { | ||
326 | if (JP2_JP2H != box.type) { | ||
327 | if (box.type == JP2_JP2C) { | ||
328 | opj_event_msg(cinfo, EVT_ERROR, "Expected JP2H Marker\n"); | ||
329 | return false; | ||
330 | } | ||
331 | cio_skip(cio, box.length - 8); | ||
332 | jp2_read_boxhdr(cinfo, cio, &box); | ||
333 | } | ||
334 | } while(JP2_JP2H != box.type); | ||
335 | |||
336 | if (!jp2_read_ihdr(jp2, cio)) | ||
337 | return false; | ||
338 | |||
339 | if (jp2->bpc == 255) { | ||
340 | if (!jp2_read_bpcc(jp2, cio)) | ||
341 | return false; | ||
342 | } | ||
343 | if (!jp2_read_colr(jp2, cio)) | ||
344 | return false; | ||
345 | |||
346 | skip_len = box.init_pos + box.length - cio_tell(cio); | ||
347 | if (skip_len < 0) { | ||
348 | opj_event_msg(cinfo, EVT_ERROR, "Error with JP2H Box\n"); | ||
349 | return false; | ||
350 | } | ||
351 | cio_skip(cio, box.init_pos + box.length - cio_tell(cio)); | ||
352 | |||
353 | return true; | ||
354 | } | ||
355 | |||
356 | static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
357 | unsigned int i; | ||
358 | opj_jp2_box_t box; | ||
359 | |||
360 | box.init_pos = cio_tell(cio); | ||
361 | cio_skip(cio, 4); | ||
362 | cio_write(cio, JP2_FTYP, 4); /* FTYP */ | ||
363 | |||
364 | cio_write(cio, jp2->brand, 4); /* BR */ | ||
365 | cio_write(cio, jp2->minversion, 4); /* MinV */ | ||
366 | |||
367 | for (i = 0; i < jp2->numcl; i++) { | ||
368 | cio_write(cio, jp2->cl[i], 4); /* CL */ | ||
369 | } | ||
370 | |||
371 | box.length = cio_tell(cio) - box.init_pos; | ||
372 | cio_seek(cio, box.init_pos); | ||
373 | cio_write(cio, box.length, 4); /* L */ | ||
374 | cio_seek(cio, box.init_pos + box.length); | ||
375 | } | ||
376 | |||
377 | static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
378 | int i; | ||
379 | opj_jp2_box_t box; | ||
380 | |||
381 | opj_common_ptr cinfo = jp2->cinfo; | ||
382 | |||
383 | jp2_read_boxhdr(cinfo, cio, &box); | ||
384 | |||
385 | if (JP2_FTYP != box.type) { | ||
386 | opj_event_msg(cinfo, EVT_ERROR, "Expected FTYP Marker\n"); | ||
387 | return false; | ||
388 | } | ||
389 | |||
390 | jp2->brand = cio_read(cio, 4); /* BR */ | ||
391 | jp2->minversion = cio_read(cio, 4); /* MinV */ | ||
392 | jp2->numcl = (box.length - 16) / 4; | ||
393 | jp2->cl = (unsigned int *) opj_malloc(jp2->numcl * sizeof(unsigned int)); | ||
394 | |||
395 | for (i = 0; i < (int)jp2->numcl; i++) { | ||
396 | jp2->cl[i] = cio_read(cio, 4); /* CLi */ | ||
397 | } | ||
398 | |||
399 | if (cio_tell(cio) - box.init_pos != box.length) { | ||
400 | opj_event_msg(cinfo, EVT_ERROR, "Error with FTYP Box\n"); | ||
401 | return false; | ||
402 | } | ||
403 | |||
404 | return true; | ||
405 | } | ||
406 | |||
407 | static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, char *index) { | ||
408 | unsigned int j2k_codestream_offset, j2k_codestream_length; | ||
409 | opj_jp2_box_t box; | ||
410 | |||
411 | opj_j2k_t *j2k = jp2->j2k; | ||
412 | |||
413 | box.init_pos = cio_tell(cio); | ||
414 | cio_skip(cio, 4); | ||
415 | cio_write(cio, JP2_JP2C, 4); /* JP2C */ | ||
416 | |||
417 | /* J2K encoding */ | ||
418 | j2k_codestream_offset = cio_tell(cio); | ||
419 | if(!j2k_encode(j2k, cio, image, index)) { | ||
420 | opj_event_msg(j2k->cinfo, EVT_ERROR, "Failed to encode image\n"); | ||
421 | return 0; | ||
422 | } | ||
423 | j2k_codestream_length = cio_tell(cio) - j2k_codestream_offset; | ||
424 | |||
425 | jp2->j2k_codestream_offset = j2k_codestream_offset; | ||
426 | jp2->j2k_codestream_length = j2k_codestream_length; | ||
427 | |||
428 | box.length = 8 + jp2->j2k_codestream_length; | ||
429 | cio_seek(cio, box.init_pos); | ||
430 | cio_write(cio, box.length, 4); /* L */ | ||
431 | cio_seek(cio, box.init_pos + box.length); | ||
432 | |||
433 | return box.length; | ||
434 | } | ||
435 | |||
436 | static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset) { | ||
437 | opj_jp2_box_t box; | ||
438 | |||
439 | opj_common_ptr cinfo = jp2->cinfo; | ||
440 | |||
441 | jp2_read_boxhdr(cinfo, cio, &box); | ||
442 | do { | ||
443 | if(JP2_JP2C != box.type) { | ||
444 | cio_skip(cio, box.length - 8); | ||
445 | jp2_read_boxhdr(cinfo, cio, &box); | ||
446 | } | ||
447 | } while(JP2_JP2C != box.type); | ||
448 | |||
449 | *j2k_codestream_offset = cio_tell(cio); | ||
450 | *j2k_codestream_length = box.length - 8; | ||
451 | |||
452 | return true; | ||
453 | } | ||
454 | |||
455 | static void jp2_write_jp(opj_cio_t *cio) { | ||
456 | opj_jp2_box_t box; | ||
457 | |||
458 | box.init_pos = cio_tell(cio); | ||
459 | cio_skip(cio, 4); | ||
460 | cio_write(cio, JP2_JP, 4); /* JP2 signature */ | ||
461 | cio_write(cio, 0x0d0a870a, 4); | ||
462 | |||
463 | box.length = cio_tell(cio) - box.init_pos; | ||
464 | cio_seek(cio, box.init_pos); | ||
465 | cio_write(cio, box.length, 4); /* L */ | ||
466 | cio_seek(cio, box.init_pos + box.length); | ||
467 | } | ||
468 | |||
469 | static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
470 | opj_jp2_box_t box; | ||
471 | |||
472 | opj_common_ptr cinfo = jp2->cinfo; | ||
473 | |||
474 | jp2_read_boxhdr(cinfo, cio, &box); | ||
475 | if (JP2_JP != box.type) { | ||
476 | opj_event_msg(cinfo, EVT_ERROR, "Expected JP Marker\n"); | ||
477 | return false; | ||
478 | } | ||
479 | if (0x0d0a870a != cio_read(cio, 4)) { | ||
480 | opj_event_msg(cinfo, EVT_ERROR, "Error with JP Marker\n"); | ||
481 | return false; | ||
482 | } | ||
483 | if (cio_tell(cio) - box.init_pos != box.length) { | ||
484 | opj_event_msg(cinfo, EVT_ERROR, "Error with JP Box size\n"); | ||
485 | return false; | ||
486 | } | ||
487 | |||
488 | return true; | ||
489 | } | ||
490 | |||
491 | |||
492 | static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
493 | if (!jp2_read_jp(jp2, cio)) | ||
494 | return false; | ||
495 | if (!jp2_read_ftyp(jp2, cio)) | ||
496 | return false; | ||
497 | if (!jp2_read_jp2h(jp2, cio)) | ||
498 | return false; | ||
499 | if (!jp2_read_jp2c(jp2, cio, &jp2->j2k_codestream_length, &jp2->j2k_codestream_offset)) | ||
500 | return false; | ||
501 | |||
502 | return true; | ||
503 | } | ||
504 | |||
505 | /* ----------------------------------------------------------------------- */ | ||
506 | /* JP2 decoder interface */ | ||
507 | /* ----------------------------------------------------------------------- */ | ||
508 | |||
509 | opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo) { | ||
510 | opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t)); | ||
511 | if(jp2) { | ||
512 | jp2->cinfo = cinfo; | ||
513 | /* create the J2K codec */ | ||
514 | jp2->j2k = j2k_create_decompress(cinfo); | ||
515 | if(jp2->j2k == NULL) { | ||
516 | jp2_destroy_decompress(jp2); | ||
517 | return NULL; | ||
518 | } | ||
519 | } | ||
520 | return jp2; | ||
521 | } | ||
522 | |||
523 | void jp2_destroy_decompress(opj_jp2_t *jp2) { | ||
524 | if(jp2) { | ||
525 | /* destroy the J2K codec */ | ||
526 | j2k_destroy_decompress(jp2->j2k); | ||
527 | |||
528 | if(jp2->comps) { | ||
529 | opj_free(jp2->comps); | ||
530 | } | ||
531 | if(jp2->cl) { | ||
532 | opj_free(jp2->cl); | ||
533 | } | ||
534 | opj_free(jp2); | ||
535 | } | ||
536 | } | ||
537 | |||
538 | void jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters) { | ||
539 | /* setup the J2K codec */ | ||
540 | j2k_setup_decoder(jp2->j2k, parameters); | ||
541 | /* further JP2 initializations go here */ | ||
542 | } | ||
543 | |||
544 | opj_image_t* jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio) { | ||
545 | opj_common_ptr cinfo; | ||
546 | opj_image_t *image = NULL; | ||
547 | |||
548 | if(!jp2 || !cio) { | ||
549 | return NULL; | ||
550 | } | ||
551 | |||
552 | cinfo = jp2->cinfo; | ||
553 | |||
554 | /* JP2 decoding */ | ||
555 | if(!jp2_read_struct(jp2, cio)) { | ||
556 | opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n"); | ||
557 | return NULL; | ||
558 | } | ||
559 | |||
560 | /* J2K decoding */ | ||
561 | image = j2k_decode(jp2->j2k, cio); | ||
562 | if(!image) { | ||
563 | opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n"); | ||
564 | } | ||
565 | |||
566 | return image; | ||
567 | } | ||
568 | |||
569 | /* ----------------------------------------------------------------------- */ | ||
570 | /* JP2 encoder interface */ | ||
571 | /* ----------------------------------------------------------------------- */ | ||
572 | |||
573 | opj_jp2_t* jp2_create_compress(opj_common_ptr cinfo) { | ||
574 | opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t)); | ||
575 | if(jp2) { | ||
576 | jp2->cinfo = cinfo; | ||
577 | /* create the J2K codec */ | ||
578 | jp2->j2k = j2k_create_compress(cinfo); | ||
579 | if(jp2->j2k == NULL) { | ||
580 | jp2_destroy_compress(jp2); | ||
581 | return NULL; | ||
582 | } | ||
583 | } | ||
584 | return jp2; | ||
585 | } | ||
586 | |||
587 | void jp2_destroy_compress(opj_jp2_t *jp2) { | ||
588 | if(jp2) { | ||
589 | /* destroy the J2K codec */ | ||
590 | j2k_destroy_compress(jp2->j2k); | ||
591 | |||
592 | if(jp2->comps) { | ||
593 | opj_free(jp2->comps); | ||
594 | } | ||
595 | if(jp2->cl) { | ||
596 | opj_free(jp2->cl); | ||
597 | } | ||
598 | opj_free(jp2); | ||
599 | } | ||
600 | } | ||
601 | |||
602 | void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image) { | ||
603 | int i; | ||
604 | int depth_0, sign; | ||
605 | |||
606 | if(!jp2 || !parameters || !image) | ||
607 | return; | ||
608 | |||
609 | /* setup the J2K codec */ | ||
610 | /* ------------------- */ | ||
611 | |||
612 | /* Check if number of components respects standard */ | ||
613 | if (image->numcomps < 1 || image->numcomps > 16384) { | ||
614 | opj_event_msg(jp2->cinfo, EVT_ERROR, "Invalid number of components specified while setting up JP2 encoder\n"); | ||
615 | return; | ||
616 | } | ||
617 | |||
618 | j2k_setup_encoder(jp2->j2k, parameters, image); | ||
619 | |||
620 | /* setup the JP2 codec */ | ||
621 | /* ------------------- */ | ||
622 | |||
623 | /* Profile box */ | ||
624 | |||
625 | jp2->brand = JP2_JP2; /* BR */ | ||
626 | jp2->minversion = 0; /* MinV */ | ||
627 | jp2->numcl = 1; | ||
628 | jp2->cl = (unsigned int*) opj_malloc(jp2->numcl * sizeof(unsigned int)); | ||
629 | jp2->cl[0] = JP2_JP2; /* CL0 : JP2 */ | ||
630 | |||
631 | /* Image Header box */ | ||
632 | |||
633 | jp2->numcomps = image->numcomps; /* NC */ | ||
634 | jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t)); | ||
635 | jp2->h = image->y1 - image->y0; /* HEIGHT */ | ||
636 | jp2->w = image->x1 - image->x0; /* WIDTH */ | ||
637 | /* BPC */ | ||
638 | depth_0 = image->comps[0].prec - 1; | ||
639 | sign = image->comps[0].sgnd; | ||
640 | jp2->bpc = depth_0 + (sign << 7); | ||
641 | for (i = 1; i < image->numcomps; i++) { | ||
642 | int depth = image->comps[i].prec - 1; | ||
643 | sign = image->comps[i].sgnd; | ||
644 | if (depth_0 != depth) | ||
645 | jp2->bpc = 255; | ||
646 | } | ||
647 | jp2->C = 7; /* C : Always 7 */ | ||
648 | jp2->UnkC = 0; /* UnkC, colorspace specified in colr box */ | ||
649 | jp2->IPR = 0; /* IPR, no intellectual property */ | ||
650 | |||
651 | /* BitsPerComponent box */ | ||
652 | |||
653 | for (i = 0; i < image->numcomps; i++) { | ||
654 | jp2->comps[i].bpcc = image->comps[i].prec - 1 + (image->comps[i].sgnd << 7); | ||
655 | } | ||
656 | |||
657 | /* Colour Specification box */ | ||
658 | |||
659 | if ((image->numcomps == 1 || image->numcomps == 3) && (jp2->bpc != 255)) { | ||
660 | jp2->meth = 1; /* METH: Enumerated colourspace */ | ||
661 | } else { | ||
662 | jp2->meth = 2; /* METH: Restricted ICC profile */ | ||
663 | } | ||
664 | if (jp2->meth == 1) { | ||
665 | if (image->color_space == 1) | ||
666 | jp2->enumcs = 16; /* sRGB as defined by IEC 61966𣇻 */ | ||
667 | else if (image->color_space == 2) | ||
668 | jp2->enumcs = 17; /* greyscale */ | ||
669 | else if (image->color_space == 3) | ||
670 | jp2->enumcs = 18; /* YUV */ | ||
671 | } else { | ||
672 | jp2->enumcs = 0; /* PROFILE (??) */ | ||
673 | } | ||
674 | jp2->precedence = 0; /* PRECEDENCE */ | ||
675 | jp2->approx = 0; /* APPROX */ | ||
676 | |||
677 | } | ||
678 | |||
679 | bool jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, char *index) { | ||
680 | |||
681 | /* JP2 encoding */ | ||
682 | |||
683 | /* JPEG 2000 Signature box */ | ||
684 | jp2_write_jp(cio); | ||
685 | /* File Type box */ | ||
686 | jp2_write_ftyp(jp2, cio); | ||
687 | /* JP2 Header box */ | ||
688 | jp2_write_jp2h(jp2, cio); | ||
689 | |||
690 | /* J2K encoding */ | ||
691 | |||
692 | if(!jp2_write_jp2c(jp2, cio, image, index)) { | ||
693 | opj_event_msg(jp2->cinfo, EVT_ERROR, "Failed to encode image\n"); | ||
694 | return false; | ||
695 | } | ||
696 | |||
697 | return true; | ||
698 | } | ||
699 | |||
700 | |||