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) 2008;2011-2012, Centre National d'Etudes Spatiales (CNES), France
9 * Copyright (c) 2012, CS Systemes d'Information, France
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
34 #include "opj_includes.h"
36 /* ----------------------------------------------------------------------- */
39 /* ----------------------------------------------------------------------- */
41 void opj_write_bytes_BE (OPJ_BYTE * p_buffer, OPJ_UINT32 p_value, OPJ_UINT32 p_nb_bytes)
43 const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + p_nb_bytes;
45 assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
47 memcpy(p_buffer,l_data_ptr,p_nb_bytes);
50 void opj_write_bytes_LE (OPJ_BYTE * p_buffer, OPJ_UINT32 p_value, OPJ_UINT32 p_nb_bytes)
52 const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + p_nb_bytes - 1;
55 assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
57 for (i=0;i<p_nb_bytes;++i) {
58 *(p_buffer++) = *(l_data_ptr--);
62 void opj_read_bytes_BE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value, OPJ_UINT32 p_nb_bytes)
64 OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
66 assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
69 memcpy(l_data_ptr+4-p_nb_bytes,p_buffer,p_nb_bytes);
72 void opj_read_bytes_LE(const OPJ_BYTE * p_buffer, OPJ_UINT32 * p_value, OPJ_UINT32 p_nb_bytes)
74 OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + p_nb_bytes-1;
77 assert(p_nb_bytes > 0 && p_nb_bytes <= sizeof(OPJ_UINT32));
80 for (i=0;i<p_nb_bytes;++i) {
81 *(l_data_ptr--) = *(p_buffer++);
85 void opj_write_double_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value)
87 const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value);
88 memcpy(p_buffer,l_data_ptr,sizeof(OPJ_FLOAT64));
91 void opj_write_double_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT64 p_value)
93 const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(OPJ_FLOAT64) - 1;
95 for (i=0;i<sizeof(OPJ_FLOAT64);++i) {
96 *(p_buffer++) = *(l_data_ptr--);
100 void opj_read_double_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value)
102 OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
103 memcpy(l_data_ptr,p_buffer,sizeof(OPJ_FLOAT64));
106 void opj_read_double_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT64 * p_value)
108 OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + sizeof(OPJ_FLOAT64)-1;
110 for (i=0;i<sizeof(OPJ_FLOAT64);++i) {
111 *(l_data_ptr--) = *(p_buffer++);
115 void opj_write_float_BE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value)
117 const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value);
118 memcpy(p_buffer,l_data_ptr,sizeof(OPJ_FLOAT32));
121 void opj_write_float_LE(OPJ_BYTE * p_buffer, OPJ_FLOAT32 p_value)
123 const OPJ_BYTE * l_data_ptr = ((const OPJ_BYTE *) &p_value) + sizeof(OPJ_FLOAT32) - 1;
125 for (i=0;i<sizeof(OPJ_FLOAT32);++i) {
126 *(p_buffer++) = *(l_data_ptr--);
130 void opj_read_float_BE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value)
132 OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value);
133 memcpy(l_data_ptr,p_buffer,sizeof(OPJ_FLOAT32));
136 void opj_read_float_LE(const OPJ_BYTE * p_buffer, OPJ_FLOAT32 * p_value)
138 OPJ_BYTE * l_data_ptr = ((OPJ_BYTE *) p_value) + sizeof(OPJ_FLOAT32)-1;
140 for (i=0;i<sizeof(OPJ_FLOAT32);++i) {
141 *(l_data_ptr--) = *(p_buffer++);
145 opj_stream_t* OPJ_CALLCONV opj_stream_create(OPJ_SIZE_T p_buffer_size,OPJ_BOOL l_is_input)
147 opj_stream_private_t * l_stream = 00;
148 l_stream = (opj_stream_private_t*) opj_malloc(sizeof(opj_stream_private_t));
153 memset(l_stream,0,sizeof(opj_stream_private_t));
154 l_stream->m_buffer_size = p_buffer_size;
155 l_stream->m_stored_data = (OPJ_BYTE *) opj_malloc(p_buffer_size);
156 if (! l_stream->m_stored_data) {
161 l_stream->m_current_data = l_stream->m_stored_data;
164 l_stream->m_status |= opj_stream_e_input;
165 l_stream->m_opj_skip = opj_stream_read_skip;
166 l_stream->m_opj_seek = opj_stream_read_seek;
169 l_stream->m_status |= opj_stream_e_output;
170 l_stream->m_opj_skip = opj_stream_write_skip;
171 l_stream->m_opj_seek = opj_stream_write_seek;
174 l_stream->m_read_fn = opj_stream_default_read;
175 l_stream->m_write_fn = opj_stream_default_write;
176 l_stream->m_skip_fn = opj_stream_default_skip;
177 l_stream->m_seek_fn = opj_stream_default_seek;
179 return (opj_stream_t *) l_stream;
182 opj_stream_t* OPJ_CALLCONV opj_stream_default_create(OPJ_BOOL l_is_input)
184 return opj_stream_create(OPJ_J2K_STREAM_CHUNK_SIZE,l_is_input);
187 void OPJ_CALLCONV opj_stream_destroy(opj_stream_t* p_stream)
189 opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
192 opj_free(l_stream->m_stored_data);
193 l_stream->m_stored_data = 00;
198 void OPJ_CALLCONV opj_stream_set_read_function(opj_stream_t* p_stream, opj_stream_read_fn p_function)
200 opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
202 if ((!l_stream) || (! (l_stream->m_status & opj_stream_e_input))) {
206 l_stream->m_read_fn = p_function;
209 void OPJ_CALLCONV opj_stream_set_seek_function(opj_stream_t* p_stream, opj_stream_seek_fn p_function)
211 opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
216 l_stream->m_seek_fn = p_function;
219 void OPJ_CALLCONV opj_stream_set_write_function(opj_stream_t* p_stream, opj_stream_write_fn p_function)
221 opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
223 if ((!l_stream )|| (! (l_stream->m_status & opj_stream_e_output))) {
227 l_stream->m_write_fn = p_function;
230 void OPJ_CALLCONV opj_stream_set_skip_function(opj_stream_t* p_stream, opj_stream_skip_fn p_function)
232 opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
238 l_stream->m_skip_fn = p_function;
241 void OPJ_CALLCONV opj_stream_set_user_data(opj_stream_t* p_stream, void * p_data)
243 opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
246 l_stream->m_user_data = p_data;
249 void OPJ_CALLCONV opj_stream_set_user_data_length(opj_stream_t* p_stream, OPJ_UINT64 data_length)
251 opj_stream_private_t* l_stream = (opj_stream_private_t*) p_stream;
254 l_stream->m_user_data_length = data_length;
257 OPJ_SIZE_T opj_stream_read_data (opj_stream_private_t * p_stream,OPJ_BYTE * p_buffer, OPJ_SIZE_T p_size, opj_event_mgr_t * p_event_mgr)
259 OPJ_SIZE_T l_read_nb_bytes = 0;
260 if (p_stream->m_bytes_in_buffer >= p_size) {
261 memcpy(p_buffer,p_stream->m_current_data,p_size);
262 p_stream->m_current_data += p_size;
263 p_stream->m_bytes_in_buffer -= p_size;
264 l_read_nb_bytes += p_size;
265 p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
266 return l_read_nb_bytes;
269 /* we are now in the case when the remaining data if not sufficient */
270 if (p_stream->m_status & opj_stream_e_end) {
271 l_read_nb_bytes += p_stream->m_bytes_in_buffer;
272 memcpy(p_buffer,p_stream->m_current_data,p_stream->m_bytes_in_buffer);
273 p_stream->m_current_data += p_stream->m_bytes_in_buffer;
274 p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
275 p_stream->m_bytes_in_buffer = 0;
276 return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T)-1;
279 /* the flag is not set, we copy data and then do an actual read on the stream */
280 if (p_stream->m_bytes_in_buffer) {
281 l_read_nb_bytes += p_stream->m_bytes_in_buffer;
282 memcpy(p_buffer,p_stream->m_current_data,p_stream->m_bytes_in_buffer);
283 p_stream->m_current_data = p_stream->m_stored_data;
284 p_buffer += p_stream->m_bytes_in_buffer;
285 p_size -= p_stream->m_bytes_in_buffer;
286 p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
287 p_stream->m_bytes_in_buffer = 0;
290 /* case where we are already at the end of the buffer
291 so reset the m_current_data to point to the start of the
292 stored buffer to get ready to read from disk*/
293 p_stream->m_current_data = p_stream->m_stored_data;
297 /* we should read less than a chunk -> read a chunk */
298 if (p_size < p_stream->m_buffer_size) {
299 /* we should do an actual read on the media */
300 p_stream->m_bytes_in_buffer = p_stream->m_read_fn(p_stream->m_stored_data,p_stream->m_buffer_size,p_stream->m_user_data);
302 if (p_stream->m_bytes_in_buffer == (OPJ_SIZE_T)-1) {
304 opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
306 p_stream->m_bytes_in_buffer = 0;
307 p_stream->m_status |= opj_stream_e_end;
309 return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T)-1;
311 else if (p_stream->m_bytes_in_buffer < p_size) {
312 /* not enough data */
313 l_read_nb_bytes += p_stream->m_bytes_in_buffer;
314 memcpy(p_buffer,p_stream->m_current_data,p_stream->m_bytes_in_buffer);
315 p_stream->m_current_data = p_stream->m_stored_data;
316 p_buffer += p_stream->m_bytes_in_buffer;
317 p_size -= p_stream->m_bytes_in_buffer;
318 p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
319 p_stream->m_bytes_in_buffer = 0;
322 l_read_nb_bytes += p_size;
323 memcpy(p_buffer,p_stream->m_current_data,p_size);
324 p_stream->m_current_data += p_size;
325 p_stream->m_bytes_in_buffer -= p_size;
326 p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
327 return l_read_nb_bytes;
331 /* direct read on the dest buffer */
332 p_stream->m_bytes_in_buffer = p_stream->m_read_fn(p_buffer,p_size,p_stream->m_user_data);
334 if (p_stream->m_bytes_in_buffer == (OPJ_SIZE_T)-1) {
336 opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
338 p_stream->m_bytes_in_buffer = 0;
339 p_stream->m_status |= opj_stream_e_end;
341 return l_read_nb_bytes ? l_read_nb_bytes : (OPJ_SIZE_T)-1;
343 else if (p_stream->m_bytes_in_buffer < p_size) {
344 /* not enough data */
345 l_read_nb_bytes += p_stream->m_bytes_in_buffer;
346 p_stream->m_current_data = p_stream->m_stored_data;
347 p_buffer += p_stream->m_bytes_in_buffer;
348 p_size -= p_stream->m_bytes_in_buffer;
349 p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
350 p_stream->m_bytes_in_buffer = 0;
353 /* we have read the exact size */
354 l_read_nb_bytes += p_stream->m_bytes_in_buffer;
355 p_stream->m_byte_offset += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
356 p_stream->m_current_data = p_stream->m_stored_data;
357 p_stream->m_bytes_in_buffer = 0;
358 return l_read_nb_bytes;
364 OPJ_SIZE_T opj_stream_write_data (opj_stream_private_t * p_stream,
365 const OPJ_BYTE * p_buffer,
367 opj_event_mgr_t * p_event_mgr)
369 OPJ_SIZE_T l_remaining_bytes = 0;
370 OPJ_SIZE_T l_write_nb_bytes = 0;
372 if (p_stream->m_status & opj_stream_e_error) {
373 return (OPJ_SIZE_T)-1;
377 l_remaining_bytes = p_stream->m_buffer_size - p_stream->m_bytes_in_buffer;
379 /* we have more memory than required */
380 if (l_remaining_bytes >= p_size) {
381 memcpy(p_stream->m_current_data, p_buffer, p_size);
383 p_stream->m_current_data += p_size;
384 p_stream->m_bytes_in_buffer += p_size;
385 l_write_nb_bytes += p_size;
386 p_stream->m_byte_offset += (OPJ_OFF_T)p_size;
388 return l_write_nb_bytes;
391 /* we copy data and then do an actual read on the stream */
392 if (l_remaining_bytes) {
393 l_write_nb_bytes += l_remaining_bytes;
395 memcpy(p_stream->m_current_data,p_buffer,l_remaining_bytes);
397 p_stream->m_current_data = p_stream->m_stored_data;
399 p_buffer += l_remaining_bytes;
400 p_size -= l_remaining_bytes;
401 p_stream->m_bytes_in_buffer += l_remaining_bytes;
402 p_stream->m_byte_offset += (OPJ_OFF_T)l_remaining_bytes;
405 if (! opj_stream_flush(p_stream, p_event_mgr)) {
406 return (OPJ_SIZE_T)-1;
412 OPJ_BOOL opj_stream_flush (opj_stream_private_t * p_stream, opj_event_mgr_t * p_event_mgr)
414 /* the number of bytes written on the media. */
415 OPJ_SIZE_T l_current_write_nb_bytes = 0;
417 p_stream->m_current_data = p_stream->m_stored_data;
419 while (p_stream->m_bytes_in_buffer) {
420 /* we should do an actual write on the media */
421 l_current_write_nb_bytes = p_stream->m_write_fn(p_stream->m_current_data,
422 p_stream->m_bytes_in_buffer,
423 p_stream->m_user_data);
425 if (l_current_write_nb_bytes == (OPJ_SIZE_T)-1) {
426 p_stream->m_status |= opj_stream_e_error;
427 opj_event_msg(p_event_mgr, EVT_INFO, "Error on writing stream!\n");
432 p_stream->m_current_data += l_current_write_nb_bytes;
433 p_stream->m_bytes_in_buffer -= l_current_write_nb_bytes;
436 p_stream->m_current_data = p_stream->m_stored_data;
441 OPJ_OFF_T opj_stream_read_skip (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
443 OPJ_OFF_T l_skip_nb_bytes = 0;
444 OPJ_OFF_T l_current_skip_nb_bytes = 0;
446 assert( p_size >= 0 );
448 if (p_stream->m_bytes_in_buffer >= (OPJ_SIZE_T)p_size) {
449 p_stream->m_current_data += p_size;
450 /* it is safe to cast p_size to OPJ_SIZE_T since it is <= m_bytes_in_buffer
451 which is of type OPJ_SIZE_T */
452 p_stream->m_bytes_in_buffer -= (OPJ_SIZE_T)p_size;
453 l_skip_nb_bytes += p_size;
454 p_stream->m_byte_offset += l_skip_nb_bytes;
455 return l_skip_nb_bytes;
458 /* we are now in the case when the remaining data if not sufficient */
459 if (p_stream->m_status & opj_stream_e_end) {
460 l_skip_nb_bytes += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
461 p_stream->m_current_data += p_stream->m_bytes_in_buffer;
462 p_stream->m_bytes_in_buffer = 0;
463 p_stream->m_byte_offset += l_skip_nb_bytes;
464 return l_skip_nb_bytes ? l_skip_nb_bytes : (OPJ_OFF_T) -1;
467 /* the flag is not set, we copy data and then do an actual skip on the stream */
468 if (p_stream->m_bytes_in_buffer) {
469 l_skip_nb_bytes += (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
470 p_stream->m_current_data = p_stream->m_stored_data;
471 p_size -= (OPJ_OFF_T)p_stream->m_bytes_in_buffer;
472 p_stream->m_bytes_in_buffer = 0;
476 /* we should do an actual skip on the media */
477 l_current_skip_nb_bytes = p_stream->m_skip_fn(p_size, p_stream->m_user_data);
478 if (l_current_skip_nb_bytes == (OPJ_OFF_T) -1) {
479 opj_event_msg(p_event_mgr, EVT_INFO, "Stream reached its end !\n");
481 p_stream->m_status |= opj_stream_e_end;
482 p_stream->m_byte_offset += l_skip_nb_bytes;
484 return l_skip_nb_bytes ? l_skip_nb_bytes : (OPJ_OFF_T) -1;
486 p_size -= l_current_skip_nb_bytes;
487 l_skip_nb_bytes += l_current_skip_nb_bytes;
490 p_stream->m_byte_offset += l_skip_nb_bytes;
492 return l_skip_nb_bytes;
495 OPJ_OFF_T opj_stream_write_skip (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
497 OPJ_BOOL l_is_written = 0;
498 OPJ_OFF_T l_current_skip_nb_bytes = 0;
499 OPJ_OFF_T l_skip_nb_bytes = 0;
501 if (p_stream->m_status & opj_stream_e_error) {
502 return (OPJ_OFF_T) -1;
505 /* we should flush data */
506 l_is_written = opj_stream_flush (p_stream, p_event_mgr);
507 if (! l_is_written) {
508 p_stream->m_status |= opj_stream_e_error;
509 p_stream->m_bytes_in_buffer = 0;
510 return (OPJ_OFF_T) -1;
515 /* we should do an actual skip on the media */
516 l_current_skip_nb_bytes = p_stream->m_skip_fn(p_size, p_stream->m_user_data);
518 if (l_current_skip_nb_bytes == (OPJ_OFF_T)-1) {
519 opj_event_msg(p_event_mgr, EVT_INFO, "Stream error!\n");
521 p_stream->m_status |= opj_stream_e_error;
522 p_stream->m_byte_offset += l_skip_nb_bytes;
524 return l_skip_nb_bytes ? l_skip_nb_bytes : (OPJ_OFF_T)-1;
526 p_size -= l_current_skip_nb_bytes;
527 l_skip_nb_bytes += l_current_skip_nb_bytes;
530 p_stream->m_byte_offset += l_skip_nb_bytes;
532 return l_skip_nb_bytes;
535 OPJ_OFF_T opj_stream_tell (const opj_stream_private_t * p_stream)
537 return p_stream->m_byte_offset;
540 OPJ_OFF_T opj_stream_get_number_byte_left (const opj_stream_private_t * p_stream)
542 assert( p_stream->m_byte_offset >= 0 );
543 assert( p_stream->m_user_data_length >= (OPJ_UINT64)p_stream->m_byte_offset);
544 return p_stream->m_user_data_length ?
545 (OPJ_OFF_T)(p_stream->m_user_data_length) - p_stream->m_byte_offset :
549 OPJ_OFF_T opj_stream_skip (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
552 return p_stream->m_opj_skip(p_stream,p_size,p_event_mgr);
555 OPJ_BOOL opj_stream_read_seek (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
557 OPJ_ARG_NOT_USED(p_event_mgr);
558 p_stream->m_current_data = p_stream->m_stored_data;
559 p_stream->m_bytes_in_buffer = 0;
561 if( !(p_stream->m_seek_fn(p_size,p_stream->m_user_data)) ) {
562 p_stream->m_status |= opj_stream_e_end;
566 /* reset stream status */
567 p_stream->m_status &= (~opj_stream_e_end);
568 p_stream->m_byte_offset = p_size;
575 OPJ_BOOL opj_stream_write_seek (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, opj_event_mgr_t * p_event_mgr)
577 if (! opj_stream_flush(p_stream,p_event_mgr)) {
578 p_stream->m_status |= opj_stream_e_error;
582 p_stream->m_current_data = p_stream->m_stored_data;
583 p_stream->m_bytes_in_buffer = 0;
585 if (! p_stream->m_seek_fn(p_size,p_stream->m_user_data)) {
586 p_stream->m_status |= opj_stream_e_error;
590 p_stream->m_byte_offset = p_size;
596 OPJ_BOOL opj_stream_seek (opj_stream_private_t * p_stream, OPJ_OFF_T p_size, struct opj_event_mgr * p_event_mgr)
599 return p_stream->m_opj_seek(p_stream,p_size,p_event_mgr);
602 OPJ_BOOL opj_stream_has_seek (const opj_stream_private_t * p_stream)
604 return p_stream->m_seek_fn != opj_stream_default_seek;
607 OPJ_SIZE_T opj_stream_default_read (void * p_buffer, OPJ_SIZE_T p_nb_bytes, void * p_user_data)
609 OPJ_ARG_NOT_USED(p_buffer);
610 OPJ_ARG_NOT_USED(p_nb_bytes);
611 OPJ_ARG_NOT_USED(p_user_data);
612 return (OPJ_SIZE_T) -1;
615 OPJ_SIZE_T opj_stream_default_write (void * p_buffer, OPJ_SIZE_T p_nb_bytes, void * p_user_data)
617 OPJ_ARG_NOT_USED(p_buffer);
618 OPJ_ARG_NOT_USED(p_nb_bytes);
619 OPJ_ARG_NOT_USED(p_user_data);
620 return (OPJ_SIZE_T) -1;
623 OPJ_OFF_T opj_stream_default_skip (OPJ_OFF_T p_nb_bytes, void * p_user_data)
625 OPJ_ARG_NOT_USED(p_nb_bytes);
626 OPJ_ARG_NOT_USED(p_user_data);
627 return (OPJ_OFF_T) -1;
630 OPJ_BOOL opj_stream_default_seek (OPJ_OFF_T p_nb_bytes, void * p_user_data)
632 OPJ_ARG_NOT_USED(p_nb_bytes);
633 OPJ_ARG_NOT_USED(p_user_data);