1 /*
2 * copyright (c) 2001 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20 #ifndef AVFORMAT_AVIO_H
21 #define AVFORMAT_AVIO_H
22
23 /**
24 * @file
25 * @ingroup lavf_io
26 * Buffered I/O operations
27 */
28
29 #include <stdint.h>
30
34
36
37 #define AVIO_SEEKABLE_NORMAL 0x0001 /**< Seeking works like for a local file */
38
39 /**
40 * Callback for checking whether to abort blocking functions.
41 * AVERROR_EXIT is returned in this case by the interrupted
42 * function. During blocking operations, callback is called with
43 * opaque as parameter. If the callback returns 1, the
44 * blocking operation will be aborted.
45 *
46 * No members can be added to this struct without a major bump, if
47 * new elements have been added after this struct in AVFormatContext
48 * or AVIOContext.
49 */
54
55 /**
56 * Directory entry types.
57 */
70 };
71
72 /**
73 * Describes single entry of the directory.
74 *
75 * Only name and type fields are guaranteed be set.
76 * Rest of fields are protocol or/and platform dependent and might be unknown.
77 */
79 char *
name;
/**< Filename */
80 int type;
/**< Type of the entry */
81 int utf8;
/**< Set to 1 when name is encoded with UTF-8, 0 otherwise.
82 Name can be encoded with UTF-8 even though 0 is set. */
83 int64_t
size;
/**< File size in bytes, -1 if unknown. */
85 epoch, -1 if unknown. */
87 -1 if unknown. */
89 epoch, -1 if unknown. */
90 int64_t
user_id;
/**< User ID of owner, -1 if unknown. */
91 int64_t
group_id;
/**< Group ID of owner, -1 if unknown. */
92 int64_t
filemode;
/**< Unix file mode, -1 if unknown. */
94
98
99 /**
100 * Bytestream IO Context.
101 * New fields can be added to the end with minor version bumps.
102 * Removal, reordering and changes to existing fields require a major
103 * version bump.
104 * sizeof(AVIOContext) must not be used outside libav*.
105 *
106 * @note None of the function pointers in AVIOContext should be called
107 * directly, they should only be set by the client application
108 * when implementing custom I/O. Normally these are set to the
109 * function pointers specified in avio_alloc_context()
110 */
112 /**
113 * A class for private options.
114 *
115 * If this AVIOContext is created by avio_open2(), av_class is set and
116 * passes the options down to protocols.
117 *
118 * If this AVIOContext is manually allocated, then av_class may be set by
119 * the caller.
120 *
121 * warning -- this field can be NULL, be sure to not pass this AVIOContext
122 * to any av_opt_* functions in that case.
123 */
125
126 /*
127 * The following shows the relationship between buffer, buf_ptr, buf_end, buf_size,
128 * and pos, when reading and when writing (since AVIOContext is used for both):
129 *
130 **********************************************************************************
131 * READING
132 **********************************************************************************
133 *
134 * | buffer_size |
135 * |---------------------------------------|
136 * | |
137 *
138 * buffer buf_ptr buf_end
139 * +---------------+-----------------------+
140 * |/ / / / / / / /|/ / / / / / /| |
141 * read buffer: |/ / consumed / | to be read /| |
142 * |/ / / / / / / /|/ / / / / / /| |
143 * +---------------+-----------------------+
144 *
145 * pos
146 * +-------------------------------------------+-----------------+
147 * input file: | | |
148 * +-------------------------------------------+-----------------+
149 *
150 *
151 **********************************************************************************
152 * WRITING
153 **********************************************************************************
154 *
155 * | buffer_size |
156 * |-------------------------------|
157 * | |
158 *
159 * buffer buf_ptr buf_end
160 * +-------------------+-----------+
161 * |/ / / / / / / / / /| |
162 * write buffer: | / to be flushed / | |
163 * |/ / / / / / / / / /| |
164 * +-------------------+-----------+
165 *
166 * pos
167 * +--------------------------+-----------------------------------+
168 * output file: | | |
169 * +--------------------------+-----------------------------------+
170 *
171 */
172 unsigned char *
buffer;
/**< Start of the buffer. */
174 unsigned char *
buf_ptr;
/**< Current position in the buffer */
175 unsigned char *
buf_end;
/**< End of the data, may be less than
176 buffer+buffer_size if the read function returned
177 less data than requested, e.g. for streams where
178 no more data has been received yet. */
179 void *
opaque;
/**< A private pointer, passed to the read/write/seek/...
180 functions. */
184 int64_t
pos;
/**< position in the file of the current buffer */
192 int error;
/**< contains the error code or 0 if no error happened */
193 /**
194 * Pause or resume playback for network streaming protocols - e.g. MMS.
195 */
197 /**
198 * Seek to a given timestamp in stream with the specified stream_index.
199 * Needed for some network streaming protocols which don't support seeking
200 * to byte position.
201 */
203 int64_t timestamp,
int flags);
204 /**
205 * A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
206 */
208
209 /**
210 * max filesize, used to limit allocations
211 * This field is internal to libavformat and access from outside is not allowed.
212 */
214
215 /**
216 * avio_read and avio_write should if possible be satisfied directly
217 * instead of going through a buffer, and avio_seek will always
218 * call the underlying seek function directly.
219 */
221
222 /**
223 * Bytes read statistic
224 * This field is internal to libavformat and access from outside is not allowed.
225 */
227
228 /**
229 * seek statistic
230 * This field is internal to libavformat and access from outside is not allowed.
231 */
233
234 /**
235 * writeout statistic
236 * This field is internal to libavformat and access from outside is not allowed.
237 */
239
240 /**
241 * Original buffer size
242 * used internally after probing and ensure seekback to reset the buffer size
243 * This field is internal to libavformat and access from outside is not allowed.
244 */
246
247 /**
248 * Threshold to favor readahead over seek.
249 * This is current internal only, do not use from outside.
250 */
252
253 /**
254 * ',' separated list of allowed protocols.
255 */
258
259 /* unbuffered I/O */
260
261 /**
262 * Return the name of the protocol that will handle the passed URL.
263 *
264 * NULL is returned if no protocol could be found for the given URL.
265 *
266 * @return Name of the protocol or NULL.
267 */
269
270 /**
271 * Return AVIO_FLAG_* access flags corresponding to the access permissions
272 * of the resource in url, or a negative value corresponding to an
273 * AVERROR code in case of failure. The returned access flags are
274 * masked by the value in flags.
275 *
276 * @note This function is intrinsically unsafe, in the sense that the
277 * checked resource may change its existence or permission status from
278 * one call to another. Thus you should not trust the returned value,
279 * unless you are sure that no other processes are accessing the
280 * checked resource.
281 */
283
284 /**
285 * Move or rename a resource.
286 *
287 * @note url_src and url_dst should share the same protocol and authority.
288 *
289 * @param url_src url to resource to be moved
290 * @param url_dst new url to resource if the operation succeeded
291 * @return >=0 on success or negative on error.
292 */
294
295 /**
296 * Delete a resource.
297 *
298 * @param url resource to be deleted.
299 * @return >=0 on success or negative on error.
300 */
302
303 /**
304 * Open directory for reading.
305 *
306 * @param s directory read context. Pointer to a NULL pointer must be passed.
307 * @param url directory to be listed.
308 * @param options A dictionary filled with protocol-private options. On return
309 * this parameter will be destroyed and replaced with a dictionary
310 * containing options that were not found. May be NULL.
311 * @return >=0 on success or negative on error.
312 */
314
315 /**
316 * Get next directory entry.
317 *
318 * Returned entry must be freed with avio_free_directory_entry(). In particular
319 * it may outlive AVIODirContext.
320 *
321 * @param s directory read context.
322 * @param[out] next next entry or NULL when no more entries.
323 * @return >=0 on success or negative on error. End of list is not considered an
324 * error.
325 */
327
328 /**
329 * Close directory.
330 *
331 * @note Entries created using avio_read_dir() are not deleted and must be
332 * freeded with avio_free_directory_entry().
333 *
334 * @param s directory read context.
335 * @return >=0 on success or negative on error.
336 */
338
339 /**
340 * Free entry allocated by avio_read_dir().
341 *
342 * @param entry entry to be freed.
343 */
345
346 /**
347 * Allocate and initialize an AVIOContext for buffered I/O. It must be later
348 * freed with av_free().
349 *
350 * @param buffer Memory block for input/output operations via AVIOContext.
351 * The buffer must be allocated with av_malloc() and friends.
352 * It may be freed and replaced with a new buffer by libavformat.
353 * AVIOContext.buffer holds the buffer currently in use,
354 * which must be later freed with av_free().
355 * @param buffer_size The buffer size is very important for performance.
356 * For protocols with fixed blocksize it should be set to this blocksize.
357 * For others a typical size is a cache page, e.g. 4kb.
358 * @param write_flag Set to 1 if the buffer should be writable, 0 otherwise.
359 * @param opaque An opaque pointer to user-specific data.
360 * @param read_packet A function for refilling the buffer, may be NULL.
361 * @param write_packet A function for writing the buffer contents, may be NULL.
362 * The function may not change the input buffers content.
363 * @param seek A function for seeking to specified byte position, may be NULL.
364 *
365 * @return Allocated AVIOContext or NULL on failure.
366 */
369 int buffer_size,
370 int write_flag,
371 void *opaque,
374 int64_t (*seek)(
void *opaque, int64_t
offset,
int whence));
375
386
387 /**
388 * Write a NULL-terminated string.
389 * @return number of bytes written.
390 */
392
393 /**
394 * Convert an UTF-8 string to UTF-16LE and write it.
395 * @param s the AVIOContext
396 * @param str NULL-terminated UTF-8 string
397 *
398 * @return number of bytes written.
399 */
401
402 /**
403 * Convert an UTF-8 string to UTF-16BE and write it.
404 * @param s the AVIOContext
405 * @param str NULL-terminated UTF-8 string
406 *
407 * @return number of bytes written.
408 */
410
411 /**
412 * Passing this as the "whence" parameter to a seek function causes it to
413 * return the filesize without seeking anywhere. Supporting this is optional.
414 * If it is not supported then the seek function will return <0.
415 */
416 #define AVSEEK_SIZE 0x10000
417
418 /**
419 * Oring this flag as into the "whence" parameter to a seek function causes it to
420 * seek by any means (like reopening and linear reading) or other normally unreasonable
421 * means that can be extremely slow.
422 * This may be ignored by the seek code.
423 */
424 #define AVSEEK_FORCE 0x20000
425
426 /**
427 * fseek() equivalent for AVIOContext.
428 * @return new position or AVERROR.
429 */
431
432 /**
433 * Skip given number of bytes forward
434 * @return new position or AVERROR.
435 */
437
438 /**
439 * ftell() equivalent for AVIOContext.
440 * @return position or AVERROR.
441 */
443 {
445 }
446
447 /**
448 * Get the filesize.
449 * @return filesize or AVERROR
450 */
452
453 /**
454 * feof() equivalent for AVIOContext.
455 * @return non zero if and only if end of file
456 */
458 #if FF_API_URL_FEOF
459 /**
460 * @deprecated use avio_feof()
461 */
464 #endif
465
466 /** @warning Writes up to 4 KiB per call */
468
469 /**
470 * Force flushing of buffered data.
471 *
472 * For write streams, force the buffered data to be immediately written to the output,
473 * without to wait to fill the internal buffer.
474 *
475 * For read streams, discard all currently buffered data, and advance the
476 * reported file position to that of the underlying stream. This does not
477 * read new data, and does not perform any seeks.
478 */
480
481 /**
482 * Read size bytes from AVIOContext into buf.
483 * @return number of bytes read or AVERROR
484 */
486
487 /**
488 * @name Functions for reading from AVIOContext
489 * @{
490 *
491 * @note return 0 if EOF, so you cannot use it if EOF handling is
492 * necessary
493 */
503 /**
504 * @}
505 */
506
507 /**
508 * Read a string from pb into buf. The reading will terminate when either
509 * a NULL character was encountered, maxlen bytes have been read, or nothing
510 * more can be read from pb. The result is guaranteed to be NULL-terminated, it
511 * will be truncated if buf is too small.
512 * Note that the string is not interpreted or validated in any way, it
513 * might get truncated in the middle of a sequence for multi-byte encodings.
514 *
515 * @return number of bytes read (is always <= maxlen).
516 * If reading ends on EOF or error, the return value will be one more than
517 * bytes actually read.
518 */
520
521 /**
522 * Read a UTF-16 string from pb and convert it to UTF-8.
523 * The reading will terminate when either a null or invalid character was
524 * encountered or maxlen bytes have been read.
525 * @return number of bytes read (is always <= maxlen)
526 */
529
530
531 /**
532 * @name URL open modes
533 * The flags argument to avio_open must be one of the following
534 * constants, optionally ORed with other flags.
535 * @{
536 */
537 #define AVIO_FLAG_READ 1 /**< read-only */
538 #define AVIO_FLAG_WRITE 2 /**< write-only */
539 #define AVIO_FLAG_READ_WRITE (AVIO_FLAG_READ|AVIO_FLAG_WRITE) /**< read-write pseudo flag */
540 /**
541 * @}
542 */
543
544 /**
545 * Use non-blocking mode.
546 * If this flag is set, operations on the context will return
547 * AVERROR(EAGAIN) if they can not be performed immediately.
548 * If this flag is not set, operations on the context will never return
549 * AVERROR(EAGAIN).
550 * Note that this flag does not affect the opening/connecting of the
551 * context. Connecting a protocol will always block if necessary (e.g. on
552 * network protocols) but never hang (e.g. on busy devices).
553 * Warning: non-blocking protocols is work-in-progress; this flag may be
554 * silently ignored.
555 */
556 #define AVIO_FLAG_NONBLOCK 8
557
558 /**
559 * Use direct mode.
560 * avio_read and avio_write should if possible be satisfied directly
561 * instead of going through a buffer, and avio_seek will always
562 * call the underlying seek function directly.
563 */
564 #define AVIO_FLAG_DIRECT 0x8000
565
566 /**
567 * Create and initialize a AVIOContext for accessing the
568 * resource indicated by url.
569 * @note When the resource indicated by url has been opened in
570 * read+write mode, the AVIOContext can be used only for writing.
571 *
572 * @param s Used to return the pointer to the created AVIOContext.
573 * In case of failure the pointed to value is set to NULL.
574 * @param url resource to access
575 * @param flags flags which control how the resource indicated by url
576 * is to be opened
577 * @return >= 0 in case of success, a negative value corresponding to an
578 * AVERROR code in case of failure
579 */
581
582 /**
583 * Create and initialize a AVIOContext for accessing the
584 * resource indicated by url.
585 * @note When the resource indicated by url has been opened in
586 * read+write mode, the AVIOContext can be used only for writing.
587 *
588 * @param s Used to return the pointer to the created AVIOContext.
589 * In case of failure the pointed to value is set to NULL.
590 * @param url resource to access
591 * @param flags flags which control how the resource indicated by url
592 * is to be opened
593 * @param int_cb an interrupt callback to be used at the protocols level
594 * @param options A dictionary filled with protocol-private options. On return
595 * this parameter will be destroyed and replaced with a dict containing options
596 * that were not found. May be NULL.
597 * @return >= 0 in case of success, a negative value corresponding to an
598 * AVERROR code in case of failure
599 */
602
603 /**
604 * Close the resource accessed by the AVIOContext s and free it.
605 * This function can only be used if s was opened by avio_open().
606 *
607 * The internal buffer is automatically flushed before closing the
608 * resource.
609 *
610 * @return 0 on success, an AVERROR < 0 on error.
611 * @see avio_closep
612 */
614
615 /**
616 * Close the resource accessed by the AVIOContext *s, free it
617 * and set the pointer pointing to it to NULL.
618 * This function can only be used if s was opened by avio_open().
619 *
620 * The internal buffer is automatically flushed before closing the
621 * resource.
622 *
623 * @return 0 on success, an AVERROR < 0 on error.
624 * @see avio_close
625 */
627
628
629 /**
630 * Open a write only memory stream.
631 *
632 * @param s new IO context
633 * @return zero if no error.
634 */
636
637 /**
638 * Return the written size and a pointer to the buffer. The buffer
639 * must be freed with av_free().
640 * Padding of AV_INPUT_BUFFER_PADDING_SIZE is added to the buffer.
641 *
642 * @param s IO context
643 * @param pbuffer pointer to a byte buffer
644 * @return the length of the byte buffer
645 */
647
648 /**
649 * Iterate through names of available protocols.
650 *
651 * @param opaque A private pointer representing current protocol.
652 * It must be a pointer to NULL on first iteration and will
653 * be updated by successive calls to avio_enum_protocols.
654 * @param output If set to 1, iterate over output protocols,
655 * otherwise over input protocols.
656 *
657 * @return A static string containing the name of current protocol or NULL
658 */
660
661 /**
662 * Pause and resume playing - only meaningful if using a network streaming
663 * protocol (e.g. MMS).
664 *
665 * @param h IO context from which to call the read_pause function pointer
666 * @param pause 1 for pause, 0 for resume
667 */
669
670 /**
671 * Seek to a given timestamp relative to some component stream.
672 * Only meaningful if using a network streaming protocol (e.g. MMS.).
673 *
674 * @param h IO context from which to call the seek function pointers
675 * @param stream_index The stream index that the timestamp is relative to.
676 * If stream_index is (-1) the timestamp should be in AV_TIME_BASE
677 * units from the beginning of the presentation.
678 * If a stream_index >= 0 is used and the protocol does not support
679 * seeking based on component streams, the call will fail.
680 * @param timestamp timestamp in AVStream.time_base units
681 * or if there is no stream specified then in AV_TIME_BASE units.
682 * @param flags Optional combination of AVSEEK_FLAG_BACKWARD, AVSEEK_FLAG_BYTE
683 * and AVSEEK_FLAG_ANY. The protocol may silently ignore
684 * AVSEEK_FLAG_BACKWARD and AVSEEK_FLAG_ANY, but AVSEEK_FLAG_BYTE will
685 * fail if used and not supported.
686 * @return >= 0 on success
687 * @see AVInputFormat::read_seek
688 */
690 int64_t timestamp,
int flags);
691
692 /* Avoid a warning. The header can not be included because it breaks c++. */
693 struct AVBPrint;
694
695 /**
696 * Read contents of h into print buffer, up to max_size bytes, or up to EOF.
697 *
698 * @return 0 for success (max_size bytes read or EOF reached), negative error
699 * code otherwise
700 */
702
703 /**
704 * Accept and allocate a client context on a server context.
705 * @param s the server context
706 * @param c the client context, must be unallocated
707 * @return >= 0 on success or a negative value corresponding
708 * to an AVERROR on failure
709 */
711
712 /**
713 * Perform one step of the protocol handshake to accept a new client.
714 * This function must be called on a client returned by avio_accept() before
715 * using it as a read/write context.
716 * It is separate from avio_accept() because it may block.
717 * A step of the handshake is defined by places where the application may
718 * decide to change the proceedings.
719 * For example, on a protocol with a request header and a reply header, each
720 * one can constitute a step because the application may use the parameters
721 * from the request to change parameters in the reply; or each individual
722 * chunk of the request can constitute a step.
723 * If the handshake is already finished, avio_handshake() does nothing and
724 * returns 0 immediately.
725 *
726 * @param c the client context to perform the handshake on
727 * @return 0 on a complete and successful handshake
728 * > 0 if the handshake progressed, but is not complete
729 * < 0 for an AVERROR code
730 */
732 #endif /* AVFORMAT_AVIO_H */
int avio_open(AVIOContext **s, const char *url, int flags)
Create and initialize a AVIOContext for accessing the resource indicated by url.
void avio_wb64(AVIOContext *s, uint64_t val)
const char const char void * val
void avio_wl16(AVIOContext *s, unsigned int val)
int64_t avio_size(AVIOContext *s)
Get the filesize.
int64_t(* read_seek)(void *opaque, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp in stream with the specified stream_index.
int avpriv_io_delete(const char *url)
Delete a resource.
int avio_put_str16be(AVIOContext *s, const char *str)
Convert an UTF-8 string to UTF-16BE and write it.
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
int64_t filemode
Unix file mode, -1 if unknown.
unsigned char * buf_ptr
Current position in the buffer.
int writeout_count
writeout statistic This field is internal to libavformat and access from outside is not allowed...
unsigned char * buf_end
End of the data, may be less than buffer+buffer_size if the read function returned less data than req...
int write_flag
true if open for writing
int avio_read_to_bprint(AVIOContext *h, struct AVBPrint *pb, size_t max_size)
Read contents of h into print buffer, up to max_size bytes, or up to EOF.
Describes single entry of the directory.
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
unsigned char * buffer
Start of the buffer.
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
int64_t(* seek)(void *opaque, int64_t offset, int whence)
void * opaque
A private pointer, passed to the read/write/seek/...
unsigned int avio_rb16(AVIOContext *s)
int64_t maxsize
max filesize, used to limit allocations This field is internal to libavformat and access from outside...
int avio_get_str16le(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a UTF-16 string from pb and convert it to UTF-8.
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
int64_t modification_timestamp
Time of last modification in microseconds since unix epoch, -1 if unknown.
int avio_accept(AVIOContext *s, AVIOContext **c)
Accept and allocate a client context on a server context.
void avio_wl32(AVIOContext *s, unsigned int val)
unsigned int avio_rb32(AVIOContext *s)
const AVClass * av_class
A class for private options.
int64_t bytes_read
Bytes read statistic This field is internal to libavformat and access from outside is not allowed...
uint64_t avio_rb64(AVIOContext *s)
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
const OptionDef options[]
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
int avio_check(const char *url, int flags)
Return AVIO_FLAG_* access flags corresponding to the access permissions of the resource in url...
void avio_wl64(AVIOContext *s, uint64_t val)
Callback for checking whether to abort blocking functions.
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
int(* write_packet)(void *opaque, uint8_t *buf, int buf_size)
const AVIOInterruptCB int_cb
int(* read_packet)(void *opaque, uint8_t *buf, int buf_size)
unsigned int avio_rl32(AVIOContext *s)
const char * avio_enum_protocols(void **opaque, int output)
Iterate through names of available protocols.
int avio_close(AVIOContext *s)
Close the resource accessed by the AVIOContext s and free it.
int utf8
Set to 1 when name is encoded with UTF-8, 0 otherwise.
const char * protocol_whitelist
',' separated list of allowed protocols.
static const uint8_t offset[127][2]
int direct
avio_read and avio_write should if possible be satisfied directly instead of going through a buffer...
#define av_printf_format(fmtpos, attrpos)
int seek_count
seek statistic This field is internal to libavformat and access from outside is not allowed...
int avio_r8(AVIOContext *s)
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
unsigned int avio_rb24(AVIOContext *s)
void avio_free_directory_entry(AVIODirEntry **entry)
Free entry allocated by avio_read_dir().
int64_t access_timestamp
Time of last access in microseconds since unix epoch, -1 if unknown.
unsigned char * checksum_ptr
void avio_wb24(AVIOContext *s, unsigned int val)
int must_flush
true if the next seek should flush
unsigned long(* update_checksum)(unsigned long checksum, const uint8_t *buf, unsigned int size)
int64_t size
File size in bytes, -1 if unknown.
int buffer_size
Maximum buffer size.
int avpriv_io_move(const char *url_src, const char *url_dst)
Move or rename a resource.
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
int type
Type of the entry.
void avio_w8(AVIOContext *s, int b)
Describe the class of an AVClass context structure.
int64_t group_id
Group ID of owner, -1 if unknown.
const char * avio_find_protocol_name(const char *url)
Return the name of the protocol that will handle the passed URL.
int avio_put_str16le(AVIOContext *s, const char *str)
Convert an UTF-8 string to UTF-16LE and write it.
int avio_open2(AVIOContext **s, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Create and initialize a AVIOContext for accessing the resource indicated by url.
int short_seek_threshold
Threshold to favor readahead over seek.
int avio_handshake(AVIOContext *c)
Perform one step of the protocol handshake to accept a new client.
int avio_close_dir(AVIODirContext **s)
Close directory.
int error
contains the error code or 0 if no error happened
void avio_wl24(AVIOContext *s, unsigned int val)
int avio_pause(AVIOContext *h, int pause)
Pause and resume playing - only meaningful if using a network streaming protocol (e.g.
int(* read_pause)(void *opaque, int pause)
Pause or resume playback for network streaming protocols - e.g.
void avio_wb16(AVIOContext *s, unsigned int val)
#define attribute_deprecated
int orig_buffer_size
Original buffer size used internally after probing and ensure seekback to reset the buffer size This ...
unsigned int avio_rl16(AVIOContext *s)
common internal and external API header
int avio_get_str16be(AVIOContext *pb, int maxlen, char *buf, int buflen)
int64_t status_change_timestamp
Time of last status change in microseconds since unix epoch, -1 if unknown.
AVIODirEntryType
Directory entry types.
int64_t pos
position in the file of the current buffer
int64_t avio_seek_time(AVIOContext *h, int stream_index, int64_t timestamp, int flags)
Seek to a given timestamp relative to some component stream.
int avio_read_dir(AVIODirContext *s, AVIODirEntry **next)
Get next directory entry.
int eof_reached
true if eof reached
int64_t user_id
User ID of owner, -1 if unknown.
int avio_open_dir(AVIODirContext **s, const char *url, AVDictionary **options)
Open directory for reading.
void avio_wb32(AVIOContext *s, unsigned int val)
int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a string from pb into buf.
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
unsigned int avio_rl24(AVIOContext *s)
struct URLContext * url_context
int avio_closep(AVIOContext **s)
Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...
uint64_t avio_rl64(AVIOContext *s)
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2