2 * copyright (c) 2001 Fabrice Bellard
4 * This file is part of FFmpeg.
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.
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.
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
28 #define LIBAVFORMAT_VERSION_INT ((51<<16)+(10<<8)+0)
29 #define LIBAVFORMAT_VERSION 51.10.0
30 #define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
32 #define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
35 #include <stdio.h> /* FILE */
40 /* packet functions */
42 typedef struct AVPacket {
43 int64_t pts; ///< presentation time stamp in time_base units
44 int64_t dts; ///< decompression time stamp in time_base units
49 int duration; ///< presentation duration in time_base units (0 if not available)
50 void (*destruct)(struct AVPacket *);
52 int64_t pos; ///< byte position in stream, -1 if unknown
54 #define PKT_FLAG_KEY 0x0001
56 void av_destruct_packet_nofree(AVPacket *pkt);
59 * Default packet destructor.
61 void av_destruct_packet(AVPacket *pkt);
63 /* initialize optional fields of a packet */
64 static inline void av_init_packet(AVPacket *pkt)
66 pkt->pts = AV_NOPTS_VALUE;
67 pkt->dts = AV_NOPTS_VALUE;
71 pkt->stream_index = 0;
72 pkt->destruct= av_destruct_packet_nofree;
76 * Allocate the payload of a packet and intialized its fields to default values.
79 * @param size wanted payload size
80 * @return 0 if OK. AVERROR_xxx otherwise.
82 int av_new_packet(AVPacket *pkt, int size);
85 * Allocate and read the payload of a packet and intialized its fields to default values.
88 * @param size wanted payload size
89 * @return >0 (read size) if OK. AVERROR_xxx otherwise.
91 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
94 * @warning This is a hack - the packet memory allocation stuff is broken. The
95 * packet is allocated if it was not really allocated
97 int av_dup_packet(AVPacket *pkt);
102 * @param pkt packet to free
104 static inline void av_free_packet(AVPacket *pkt)
106 if (pkt && pkt->destruct) {
111 /*************************************************/
112 /* fractional numbers for exact pts handling */
114 /* the exact value of the fractional number is: 'val + num / den'. num
115 is assumed to be such as 0 <= num < den */
116 typedef struct AVFrac {
117 int64_t val, num, den;
118 } AVFrac attribute_deprecated;
120 /*************************************************/
121 /* input/output formats */
125 struct AVFormatContext;
127 /** this structure contains the data a format has to probe a file */
128 typedef struct AVProbeData {
129 const char *filename;
134 #define AVPROBE_SCORE_MAX 100 ///< max score, half of that is used for file extension based detection
136 typedef struct AVFormatParameters {
137 AVRational time_base;
142 enum PixelFormat pix_fmt;
143 int channel; /**< used to select dv channel */
144 #if LIBAVFORMAT_VERSION_INT < (52<<16)
145 const char *device; /**< video, audio or DV device */
147 const char *standard; /**< tv standard, NTSC, PAL, SECAM */
148 int mpeg2ts_raw:1; /**< force raw MPEG2 transport stream output, if possible */
149 int mpeg2ts_compute_pcr:1; /**< compute exact PCR for each transport
150 stream packet (only meaningful if
151 mpeg2ts_raw is TRUE */
152 int initial_pause:1; /**< do not begin to play the stream
153 immediately (RTSP only) */
154 int prealloced_context:1;
155 enum CodecID video_codec_id;
156 enum CodecID audio_codec_id;
157 } AVFormatParameters;
159 //! demuxer will use url_fopen, no opened file should be provided by the caller
160 #define AVFMT_NOFILE 0x0001
161 #define AVFMT_NEEDNUMBER 0x0002 /**< needs '%d' in filename */
162 #define AVFMT_SHOW_IDS 0x0008 /**< show format stream IDs numbers */
163 #define AVFMT_RAWPICTURE 0x0020 /**< format wants AVPicture structure for
165 #define AVFMT_GLOBALHEADER 0x0040 /**< format wants global header */
166 #define AVFMT_NOTIMESTAMPS 0x0080 /**< format doesnt need / has any timestamps */
167 #define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
169 typedef struct AVOutputFormat {
171 const char *long_name;
172 const char *mime_type;
173 const char *extensions; /**< comma separated filename extensions */
174 /** size of private data so that it can be allocated in the wrapper */
177 enum CodecID audio_codec; /**< default audio codec */
178 enum CodecID video_codec; /**< default video codec */
179 int (*write_header)(struct AVFormatContext *);
180 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
181 int (*write_trailer)(struct AVFormatContext *);
182 /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
184 /** currently only used to set pixel format if not YUV420P */
185 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
186 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
189 * list of supported codec_id-codec_tag pairs, ordered by "better choice first"
190 * the arrays are all CODEC_ID_NONE terminated
192 const struct AVCodecTag **codec_tag;
195 struct AVOutputFormat *next;
198 typedef struct AVInputFormat {
200 const char *long_name;
201 /** size of private data so that it can be allocated in the wrapper */
203 /** tell if a given file has a chance of being parsing by this format */
204 int (*read_probe)(AVProbeData *);
205 /** read the format header and initialize the AVFormatContext
206 structure. Return 0 if OK. 'ap' if non NULL contains
207 additionnal paramters. Only used in raw format right
208 now. 'av_new_stream' should be called to create new streams. */
209 int (*read_header)(struct AVFormatContext *,
210 AVFormatParameters *ap);
211 /** read one packet and put it in 'pkt'. pts and flags are also
212 set. 'av_new_stream' can be called only if the flag
213 AVFMTCTX_NOHEADER is used. */
214 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
215 /** close the stream. The AVFormatContext and AVStreams are not
216 freed by this function */
217 int (*read_close)(struct AVFormatContext *);
219 * seek to a given timestamp relative to the frames in
220 * stream component stream_index
221 * @param stream_index must not be -1
222 * @param flags selects which direction should be preferred if no exact
225 int (*read_seek)(struct AVFormatContext *,
226 int stream_index, int64_t timestamp, int flags);
228 * gets the next timestamp in AV_TIME_BASE units.
230 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
231 int64_t *pos, int64_t pos_limit);
232 /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
234 /** if extensions are defined, then no probe is done. You should
235 usually not use extension format guessing because it is not
237 const char *extensions;
238 /** general purpose read only value that the format can use */
241 /** start/resume playing - only meaningful if using a network based format
243 int (*read_play)(struct AVFormatContext *);
245 /** pause playing - only meaningful if using a network based format
247 int (*read_pause)(struct AVFormatContext *);
249 const struct AVCodecTag **codec_tag;
252 struct AVInputFormat *next;
255 typedef struct AVIndexEntry {
258 #define AVINDEX_KEYFRAME 0x0001
260 int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align)
261 int min_distance; /**< min distance between this and the previous keyframe, used to avoid unneeded searching */
264 typedef struct AVStream {
265 int index; /**< stream index in AVFormatContext */
266 int id; /**< format specific stream id */
267 AVCodecContext *codec; /**< codec context */
269 * real base frame rate of the stream.
270 * this is the lowest framerate with which all timestamps can be
271 * represented accurately (its the least common multiple of all
272 * framerates in the stream), Note, this value is just a guess!
273 * for example if the timebase is 1/90000 and all frames have either
274 * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
276 AVRational r_frame_rate;
278 #if LIBAVFORMAT_VERSION_INT < (52<<16)
279 /* internal data used in av_find_stream_info() */
280 int64_t codec_info_duration;
281 int codec_info_nb_frames;
283 /** encoding: PTS generation when outputing stream */
287 * this is the fundamental unit of time (in seconds) in terms
288 * of which frame timestamps are represented. for fixed-fps content,
289 * timebase should be 1/framerate and timestamp increments should be
292 AVRational time_base;
293 int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
294 /* ffmpeg.c private use */
295 int stream_copy; /**< if set, just copy stream */
296 enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
297 //FIXME move stuff to a flags field?
298 /** quality, as it has been removed from AVCodecContext and put in AVVideoFrame
299 * MN:dunno if thats the right place, for it */
301 /** decoding: position of the first frame of the component, in
302 AV_TIME_BASE fractional seconds. */
304 /** decoding: duration of the stream, in AV_TIME_BASE fractional
308 char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
310 /* av_read_frame() support */
311 int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
312 struct AVCodecParserContext *parser;
315 int last_IP_duration;
317 /* av_seek_frame() support */
318 AVIndexEntry *index_entries; /**< only used if the format does not
319 support seeking natively */
320 int nb_index_entries;
321 unsigned int index_entries_allocated_size;
323 int64_t nb_frames; ///< number of frames in this stream if known or 0
325 #define MAX_REORDER_DELAY 4
326 int64_t pts_buffer[MAX_REORDER_DELAY+1];
329 #define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
330 (streams are added dynamically) */
332 #define MAX_STREAMS 20
334 /* format I/O context */
335 typedef struct AVFormatContext {
336 const AVClass *av_class; /**< set by av_alloc_format_context */
337 /* can only be iformat or oformat, not both at the same time */
338 struct AVInputFormat *iformat;
339 struct AVOutputFormat *oformat;
342 unsigned int nb_streams;
343 AVStream *streams[MAX_STREAMS];
344 char filename[1024]; /**< input or output filename */
352 int year; /**< ID3 year, 0 if none */
353 int track; /**< track number, 0 if none */
354 char genre[32]; /**< ID3 genre */
356 int ctx_flags; /**< format specific flags, see AVFMTCTX_xx */
357 /* private data for pts handling (do not modify directly) */
358 /** This buffer is only needed when packets were already buffered but
359 not decoded, for example to get the codec parameters in mpeg
361 struct AVPacketList *packet_buffer;
363 /** decoding: position of the first frame of the component, in
364 AV_TIME_BASE fractional seconds. NEVER set this value directly:
365 it is deduced from the AVStream values. */
367 /** decoding: duration of the stream, in AV_TIME_BASE fractional
368 seconds. NEVER set this value directly: it is deduced from the
371 /** decoding: total file size. 0 if unknown */
373 /** decoding: total stream bitrate in bit/s, 0 if not
374 available. Never set it directly if the file_size and the
375 duration are known as ffmpeg can compute it automatically. */
378 /* av_read_frame() support */
380 const uint8_t *cur_ptr;
384 /* av_seek_frame() support */
385 int64_t data_offset; /** offset of the first packet */
393 #define AVFMT_NOOUTPUTLOOP -1
394 #define AVFMT_INFINITEOUTPUTLOOP 0
395 /** number of times to loop output in formats that support it */
399 #define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
400 #define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
403 /** decoding: size of data to probe; encoding unused */
404 unsigned int probesize;
407 * maximum duration in AV_TIME_BASE units over which the input should be analyzed in av_find_stream_info()
409 int max_analyze_duration;
415 typedef struct AVPacketList {
417 struct AVPacketList *next;
420 extern AVInputFormat *first_iformat;
421 extern AVOutputFormat *first_oformat;
423 enum CodecID av_guess_image2_codec(const char *filename);
425 /* XXX: use automatic init with either ELF sections or C file parser */
433 void av_register_input_format(AVInputFormat *format);
434 void av_register_output_format(AVOutputFormat *format);
435 AVOutputFormat *guess_stream_format(const char *short_name,
436 const char *filename, const char *mime_type);
437 AVOutputFormat *guess_format(const char *short_name,
438 const char *filename, const char *mime_type);
441 * Guesses the codec id based upon muxer and filename.
443 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
444 const char *filename, const char *mime_type, enum CodecType type);
447 * Print nice hexa dump of a buffer
448 * @param f stream for output
450 * @param size buffer size
452 void av_hex_dump(FILE *f, uint8_t *buf, int size);
455 * Print on 'f' a nice dump of a packet
456 * @param f stream for output
457 * @param pkt packet to dump
458 * @param dump_payload true if the payload must be displayed too
460 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
462 void av_register_all(void);
464 /** codec tag <-> codec id */
465 enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag);
466 unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
468 /* media file input */
471 * finds AVInputFormat based on input format's short name.
473 AVInputFormat *av_find_input_format(const char *short_name);
478 * @param is_opened whether the file is already opened, determines whether
479 * demuxers with or without AVFMT_NOFILE are probed
481 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
484 * Allocates all the structures needed to read an input stream.
485 * This does not open the needed codecs for decoding the stream[s].
487 int av_open_input_stream(AVFormatContext **ic_ptr,
488 ByteIOContext *pb, const char *filename,
489 AVInputFormat *fmt, AVFormatParameters *ap);
492 * Open a media file as input. The codec are not opened. Only the file
493 * header (if present) is read.
495 * @param ic_ptr the opened media file handle is put here
496 * @param filename filename to open.
497 * @param fmt if non NULL, force the file format to use
498 * @param buf_size optional buffer size (zero if default is OK)
499 * @param ap additionnal parameters needed when opening the file (NULL if default)
500 * @return 0 if OK. AVERROR_xxx otherwise.
502 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
505 AVFormatParameters *ap);
506 /** no av_open for output, so applications will need this: */
507 AVFormatContext *av_alloc_format_context(void);
510 * Read packets of a media file to get stream information. This
511 * is useful for file formats with no headers such as MPEG. This
512 * function also computes the real frame rate in case of mpeg2 repeat
514 * The logical file position is not changed by this function;
515 * examined packets may be buffered for later processing.
517 * @param ic media file handle
518 * @return >=0 if OK. AVERROR_xxx if error.
519 * @todo let user decide somehow what information is needed so we dont waste time geting stuff the user doesnt need
521 int av_find_stream_info(AVFormatContext *ic);
524 * Read a transport packet from a media file.
526 * This function is absolete and should never be used.
527 * Use av_read_frame() instead.
529 * @param s media file handle
530 * @param pkt is filled
531 * @return 0 if OK. AVERROR_xxx if error.
533 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
536 * Return the next frame of a stream.
538 * The returned packet is valid
539 * until the next av_read_frame() or until av_close_input_file() and
540 * must be freed with av_free_packet. For video, the packet contains
541 * exactly one frame. For audio, it contains an integer number of
542 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
543 * data). If the audio frames have a variable size (e.g. MPEG audio),
544 * then it contains one frame.
546 * pkt->pts, pkt->dts and pkt->duration are always set to correct
547 * values in AVStream.timebase units (and guessed if the format cannot
548 * provided them). pkt->pts can be AV_NOPTS_VALUE if the video format
549 * has B frames, so it is better to rely on pkt->dts if you do not
550 * decompress the payload.
552 * @return 0 if OK, < 0 if error or end of file.
554 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
557 * Seek to the key frame at timestamp.
558 * 'timestamp' in 'stream_index'.
559 * @param stream_index If stream_index is (-1), a default
560 * stream is selected, and timestamp is automatically converted
561 * from AV_TIME_BASE units to the stream specific time_base.
562 * @param timestamp timestamp in AVStream.time_base units
563 * or if there is no stream specified then in AV_TIME_BASE units
564 * @param flags flags which select direction and seeking mode
565 * @return >= 0 on success
567 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
570 * start playing a network based stream (e.g. RTSP stream) at the
573 int av_read_play(AVFormatContext *s);
576 * Pause a network based stream (e.g. RTSP stream).
578 * Use av_read_play() to resume it.
580 int av_read_pause(AVFormatContext *s);
583 * Close a media file (but not its codecs).
585 * @param s media file handle
587 void av_close_input_file(AVFormatContext *s);
590 * Add a new stream to a media file.
592 * Can only be called in the read_header() function. If the flag
593 * AVFMTCTX_NOHEADER is in the format context, then new streams
594 * can be added in read_packet too.
596 * @param s media file handle
597 * @param id file format dependent stream id
599 AVStream *av_new_stream(AVFormatContext *s, int id);
602 * Set the pts for a given stream.
605 * @param pts_wrap_bits number of bits effectively used by the pts
606 * (used for wrap control, 33 is the value for MPEG)
607 * @param pts_num numerator to convert to seconds (MPEG: 1)
608 * @param pts_den denominator to convert to seconds (MPEG: 90000)
610 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
611 int pts_num, int pts_den);
613 #define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
614 #define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
615 #define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
617 int av_find_default_stream_index(AVFormatContext *s);
620 * Gets the index for a specific timestamp.
621 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond to
622 * the timestamp which is <= the requested one, if backward is 0
624 * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
625 * @return < 0 if no such timestamp could be found
627 int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
630 * Add a index entry into a sorted list updateing if it is already there.
632 * @param timestamp timestamp in the timebase of the given stream
634 int av_add_index_entry(AVStream *st,
635 int64_t pos, int64_t timestamp, int size, int distance, int flags);
638 * Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp().
639 * this isnt supposed to be called directly by a user application, but by demuxers
640 * @param target_ts target timestamp in the time base of the given stream
641 * @param stream_index stream number
643 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
646 * Updates cur_dts of all streams based on given timestamp and AVStream.
648 * Stream ref_st unchanged, others set cur_dts in their native timebase
649 * only needed for timestamp wrapping or if (dts not set and pts!=dts)
650 * @param timestamp new dts expressed in time_base of param ref_st
651 * @param ref_st reference stream giving time_base of param timestamp
653 void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
656 * Does a binary search using read_timestamp().
657 * this isnt supposed to be called directly by a user application, but by demuxers
658 * @param target_ts target timestamp in the time base of the given stream
659 * @param stream_index stream number
661 int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
663 /** media file output */
664 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
667 * allocate the stream private data and write the stream header to an
670 * @param s media file handle
671 * @return 0 if OK. AVERROR_xxx if error.
673 int av_write_header(AVFormatContext *s);
676 * Write a packet to an output media file.
678 * The packet shall contain one audio or video frame.
679 * The packet must be correctly interleaved according to the container specification,
680 * if not then av_interleaved_write_frame must be used
682 * @param s media file handle
683 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
684 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
686 int av_write_frame(AVFormatContext *s, AVPacket *pkt);
689 * Writes a packet to an output media file ensuring correct interleaving.
691 * The packet must contain one audio or video frame.
692 * If the packets are already correctly interleaved the application should
693 * call av_write_frame() instead as its slightly faster, its also important
694 * to keep in mind that completly non interleaved input will need huge amounts
695 * of memory to interleave with this, so its prefereable to interleave at the
698 * @param s media file handle
699 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
700 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
702 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
705 * Interleave a packet per DTS in an output media file.
707 * Packets with pkt->destruct == av_destruct_packet will be freed inside this function,
708 * so they cannot be used after it, note calling av_free_packet() on them is still safe.
710 * @param s media file handle
711 * @param out the interleaved packet will be output here
712 * @param in the input packet
713 * @param flush 1 if no further packets are available as input and all
714 * remaining packets should be output
715 * @return 1 if a packet was output, 0 if no packet could be output,
716 * < 0 if an error occured
718 int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush);
721 * @brief Write the stream trailer to an output media file and
722 * free the file private data.
724 * @param s media file handle
725 * @return 0 if OK. AVERROR_xxx if error.
727 int av_write_trailer(AVFormatContext *s);
729 void dump_format(AVFormatContext *ic,
735 * parses width and height out of string str.
737 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
740 * Converts frame rate from string to a fraction.
742 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
745 * Converts date string to number of seconds since Jan 1st, 1970.
749 * - If not a duration:
750 * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
751 * Time is localtime unless Z is suffixed to the end. In this case GMT
752 * Return the date in micro seconds since 1970
755 * HH[:MM[:SS[.m...]]]
759 int64_t parse_date(const char *datestr, int duration);
761 int64_t av_gettime(void);
763 /* ffm specific for ffserver */
764 #define FFM_PACKET_SIZE 4096
765 offset_t ffm_read_write_index(int fd);
766 void ffm_write_write_index(int fd, offset_t pos);
767 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
770 * Attempts to find a specific tag in a URL.
772 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
775 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
778 * Returns in 'buf' the path with '%d' replaced by number.
780 * Also handles the '%0nd' format where 'n' is the total number
781 * of digits and '%%'.
783 * @param buf destination buffer
784 * @param buf_size destination buffer size
785 * @param path numbered sequence string
786 * @number frame number
787 * @return 0 if OK, -1 if format error.
789 int av_get_frame_filename(char *buf, int buf_size,
790 const char *path, int number);
793 * Check whether filename actually is a numbered sequence generator.
795 * @param filename possible numbered sequence string
796 * @return 1 if a valid numbered sequence string, 0 otherwise.
798 int av_filename_number_test(const char *filename);
801 int video_grab_init(void);
802 int audio_init(void);
805 int dv1394_init(void);
806 int dc1394_init(void);
808 #ifdef HAVE_AV_CONFIG_H
810 #include "os_support.h"
812 int strstart(const char *str, const char *val, const char **ptr);
813 int stristart(const char *str, const char *val, const char **ptr);
814 void pstrcpy(char *buf, int buf_size, const char *str);
815 char *pstrcat(char *buf, int buf_size, const char *s);
817 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
820 #define dynarray_add(tab, nb_ptr, elem)\
822 typeof(tab) _tab = (tab);\
823 typeof(elem) _elem = (elem);\
824 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
825 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
828 #define dynarray_add(tab, nb_ptr, elem)\
830 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
834 time_t mktimegm(struct tm *tm);
835 struct tm *brktimegm(time_t secs, struct tm *tm);
836 const char *small_strptime(const char *p, const char *fmt,
840 int resolve_host(struct in_addr *sin_addr, const char *hostname);
842 void url_split(char *proto, int proto_size,
843 char *authorization, int authorization_size,
844 char *hostname, int hostname_size,
846 char *path, int path_size,
849 int match_ext(const char *filename, const char *extensions);
851 #endif /* HAVE_AV_CONFIG_H */
857 #endif /* AVFORMAT_H */