100l (forgoten seeking functions)
[libav.git] / libavformat / avformat.h
1 #ifndef AVFORMAT_H
2 #define AVFORMAT_H
3
4 #ifdef __cplusplus
5 extern "C" {
6 #endif
7
8 #define LIBAVFORMAT_BUILD 4619
9
10 #define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
11 #define LIBAVFORMAT_VERSION FFMPEG_VERSION
12 #define LIBAVFORMAT_IDENT "FFmpeg" FFMPEG_VERSION "b" AV_STRINGIFY(LIBAVFORMAT_BUILD)
13
14 #include <time.h>
15 #include <stdio.h> /* FILE */
16 #include "avcodec.h"
17
18 #include "avio.h"
19
20 /* packet functions */
21
22 #ifndef MAXINT64
23 #define MAXINT64 int64_t_C(0x7fffffffffffffff)
24 #endif
25
26 #ifndef MININT64
27 #define MININT64 int64_t_C(0x8000000000000000)
28 #endif
29
30 typedef struct AVPacket {
31 int64_t pts; /* presentation time stamp in AV_TIME_BASE units (or
32 pts_den units in muxers or demuxers) */
33 int64_t dts; /* decompression time stamp in AV_TIME_BASE units (or
34 pts_den units in muxers or demuxers) */
35 uint8_t *data;
36 int size;
37 int stream_index;
38 int flags;
39 int duration; /* presentation duration (0 if not available) */
40 void (*destruct)(struct AVPacket *);
41 void *priv;
42 } AVPacket;
43 #define PKT_FLAG_KEY 0x0001
44
45 void av_destruct_packet_nofree(AVPacket *pkt);
46
47 /* initialize optional fields of a packet */
48 static inline void av_init_packet(AVPacket *pkt)
49 {
50 pkt->pts = AV_NOPTS_VALUE;
51 pkt->dts = AV_NOPTS_VALUE;
52 pkt->duration = 0;
53 pkt->flags = 0;
54 pkt->stream_index = 0;
55 pkt->destruct= av_destruct_packet_nofree;
56 }
57
58 int av_new_packet(AVPacket *pkt, int size);
59 int av_dup_packet(AVPacket *pkt);
60
61 /**
62 * Free a packet
63 *
64 * @param pkt packet to free
65 */
66 static inline void av_free_packet(AVPacket *pkt)
67 {
68 if (pkt && pkt->destruct) {
69 pkt->destruct(pkt);
70 }
71 }
72
73 /*************************************************/
74 /* fractional numbers for exact pts handling */
75
76 /* the exact value of the fractional number is: 'val + num / den'. num
77 is assumed to be such as 0 <= num < den */
78 typedef struct AVFrac {
79 int64_t val, num, den;
80 } AVFrac;
81
82 void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
83 void av_frac_add(AVFrac *f, int64_t incr);
84 void av_frac_set(AVFrac *f, int64_t val);
85
86 /*************************************************/
87 /* input/output formats */
88
89 struct AVFormatContext;
90
91 /* this structure contains the data a format has to probe a file */
92 typedef struct AVProbeData {
93 const char *filename;
94 unsigned char *buf;
95 int buf_size;
96 } AVProbeData;
97
98 #define AVPROBE_SCORE_MAX 100
99
100 typedef struct AVFormatParameters {
101 int frame_rate;
102 int frame_rate_base;
103 int sample_rate;
104 int channels;
105 int width;
106 int height;
107 enum PixelFormat pix_fmt;
108 struct AVImageFormat *image_format;
109 int channel; /* used to select dv channel */
110 const char *device; /* video4linux, audio or DV device */
111 const char *standard; /* tv standard, NTSC, PAL, SECAM */
112 int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
113 int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
114 stream packet (only meaningful if
115 mpeg2ts_raw is TRUE */
116 int initial_pause:1; /* do not begin to play the stream
117 immediately (RTSP only) */
118 } AVFormatParameters;
119
120 #define AVFMT_NOFILE 0x0001 /* no file should be opened */
121 #define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
122 #define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
123 #define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
124 raw picture data */
125
126 typedef struct AVOutputFormat {
127 const char *name;
128 const char *long_name;
129 const char *mime_type;
130 const char *extensions; /* comma separated extensions */
131 /* size of private data so that it can be allocated in the wrapper */
132 int priv_data_size;
133 /* output support */
134 enum CodecID audio_codec; /* default audio codec */
135 enum CodecID video_codec; /* default video codec */
136 int (*write_header)(struct AVFormatContext *);
137 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
138 int (*write_trailer)(struct AVFormatContext *);
139 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
140 int flags;
141 /* currently only used to set pixel format if not YUV420P */
142 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
143 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
144 /* private fields */
145 struct AVOutputFormat *next;
146 } AVOutputFormat;
147
148 typedef struct AVInputFormat {
149 const char *name;
150 const char *long_name;
151 /* size of private data so that it can be allocated in the wrapper */
152 int priv_data_size;
153 /* tell if a given file has a chance of being parsing by this format */
154 int (*read_probe)(AVProbeData *);
155 /* read the format header and initialize the AVFormatContext
156 structure. Return 0 if OK. 'ap' if non NULL contains
157 additionnal paramters. Only used in raw format right
158 now. 'av_new_stream' should be called to create new streams. */
159 int (*read_header)(struct AVFormatContext *,
160 AVFormatParameters *ap);
161 /* read one packet and put it in 'pkt'. pts and flags are also
162 set. 'av_new_stream' can be called only if the flag
163 AVFMTCTX_NOHEADER is used. */
164 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
165 /* close the stream. The AVFormatContext and AVStreams are not
166 freed by this function */
167 int (*read_close)(struct AVFormatContext *);
168 /**
169 * seek to a given timestamp relative to the frames in
170 * stream component stream_index
171 * @param stream_index must not be -1
172 * @param flags selects which direction should be preferred if no exact
173 * match is available
174 */
175 int (*read_seek)(struct AVFormatContext *,
176 int stream_index, int64_t timestamp, int flags);
177 /**
178 * gets the next timestamp in AV_TIME_BASE units.
179 */
180 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
181 int64_t *pos, int64_t pos_limit);
182 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
183 int flags;
184 /* if extensions are defined, then no probe is done. You should
185 usually not use extension format guessing because it is not
186 reliable enough */
187 const char *extensions;
188 /* general purpose read only value that the format can use */
189 int value;
190
191 /* start/resume playing - only meaningful if using a network based format
192 (RTSP) */
193 int (*read_play)(struct AVFormatContext *);
194
195 /* pause playing - only meaningful if using a network based format
196 (RTSP) */
197 int (*read_pause)(struct AVFormatContext *);
198
199 /* private fields */
200 struct AVInputFormat *next;
201 } AVInputFormat;
202
203 typedef struct AVIndexEntry {
204 int64_t pos;
205 int64_t timestamp;
206 #define AVINDEX_KEYFRAME 0x0001
207 /* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
208 int flags;
209 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
210 } AVIndexEntry;
211
212 typedef struct AVStream {
213 int index; /* stream index in AVFormatContext */
214 int id; /* format specific stream id */
215 AVCodecContext codec; /* codec context */
216 int r_frame_rate; /* real frame rate of the stream */
217 int r_frame_rate_base;/* real frame rate base of the stream */
218 void *priv_data;
219 /* internal data used in av_find_stream_info() */
220 int64_t codec_info_duration;
221 int codec_info_nb_frames;
222 /* encoding: PTS generation when outputing stream */
223 AVFrac pts;
224 AVRational time_base;
225 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
226 /* ffmpeg.c private use */
227 int stream_copy; /* if TRUE, just copy stream */
228 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
229 * MN:dunno if thats the right place, for it */
230 float quality;
231 /* decoding: position of the first frame of the component, in
232 AV_TIME_BASE fractional seconds. */
233 int64_t start_time;
234 /* decoding: duration of the stream, in AV_TIME_BASE fractional
235 seconds. */
236 int64_t duration;
237
238 /* av_read_frame() support */
239 int need_parsing;
240 struct AVCodecParserContext *parser;
241
242 int64_t cur_dts;
243 int last_IP_duration;
244 int64_t last_IP_pts;
245 /* av_seek_frame() support */
246 AVIndexEntry *index_entries; /* only used if the format does not
247 support seeking natively */
248 int nb_index_entries;
249 int index_entries_allocated_size;
250 } AVStream;
251
252 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
253 (streams are added dynamically) */
254
255 #define MAX_STREAMS 20
256
257 /* format I/O context */
258 typedef struct AVFormatContext {
259 const AVClass *av_class; /* set by av_alloc_format_context */
260 /* can only be iformat or oformat, not both at the same time */
261 struct AVInputFormat *iformat;
262 struct AVOutputFormat *oformat;
263 void *priv_data;
264 ByteIOContext pb;
265 int nb_streams;
266 AVStream *streams[MAX_STREAMS];
267 char filename[1024]; /* input or output filename */
268 /* stream info */
269 int64_t timestamp;
270 char title[512];
271 char author[512];
272 char copyright[512];
273 char comment[512];
274 char album[512];
275 int year; /* ID3 year, 0 if none */
276 int track; /* track number, 0 if none */
277 char genre[32]; /* ID3 genre */
278
279 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
280 /* private data for pts handling (do not modify directly) */
281 /* This buffer is only needed when packets were already buffered but
282 not decoded, for example to get the codec parameters in mpeg
283 streams */
284 struct AVPacketList *packet_buffer;
285
286 /* decoding: position of the first frame of the component, in
287 AV_TIME_BASE fractional seconds. NEVER set this value directly:
288 it is deduced from the AVStream values. */
289 int64_t start_time;
290 /* decoding: duration of the stream, in AV_TIME_BASE fractional
291 seconds. NEVER set this value directly: it is deduced from the
292 AVStream values. */
293 int64_t duration;
294 /* decoding: total file size. 0 if unknown */
295 int64_t file_size;
296 /* decoding: total stream bitrate in bit/s, 0 if not
297 available. Never set it directly if the file_size and the
298 duration are known as ffmpeg can compute it automatically. */
299 int bit_rate;
300
301 /* av_read_frame() support */
302 AVStream *cur_st;
303 const uint8_t *cur_ptr;
304 int cur_len;
305 AVPacket cur_pkt;
306
307 /* av_seek_frame() support */
308 int64_t data_offset; /* offset of the first packet */
309 int index_built;
310
311 int mux_rate;
312 int packet_size;
313 } AVFormatContext;
314
315 typedef struct AVPacketList {
316 AVPacket pkt;
317 struct AVPacketList *next;
318 } AVPacketList;
319
320 extern AVInputFormat *first_iformat;
321 extern AVOutputFormat *first_oformat;
322
323 /* still image support */
324 struct AVInputImageContext;
325 typedef struct AVInputImageContext AVInputImageContext;
326
327 typedef struct AVImageInfo {
328 enum PixelFormat pix_fmt; /* requested pixel format */
329 int width; /* requested width */
330 int height; /* requested height */
331 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
332 AVPicture pict; /* returned allocated image */
333 } AVImageInfo;
334
335 /* AVImageFormat.flags field constants */
336 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
337
338 typedef struct AVImageFormat {
339 const char *name;
340 const char *extensions;
341 /* tell if a given file has a chance of being parsing by this format */
342 int (*img_probe)(AVProbeData *);
343 /* read a whole image. 'alloc_cb' is called when the image size is
344 known so that the caller can allocate the image. If 'allo_cb'
345 returns non zero, then the parsing is aborted. Return '0' if
346 OK. */
347 int (*img_read)(ByteIOContext *,
348 int (*alloc_cb)(void *, AVImageInfo *info), void *);
349 /* write the image */
350 int supported_pixel_formats; /* mask of supported formats for output */
351 int (*img_write)(ByteIOContext *, AVImageInfo *);
352 int flags;
353 struct AVImageFormat *next;
354 } AVImageFormat;
355
356 void av_register_image_format(AVImageFormat *img_fmt);
357 AVImageFormat *av_probe_image_format(AVProbeData *pd);
358 AVImageFormat *guess_image_format(const char *filename);
359 int av_read_image(ByteIOContext *pb, const char *filename,
360 AVImageFormat *fmt,
361 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
362 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
363
364 extern AVImageFormat *first_image_format;
365
366 extern AVImageFormat pnm_image_format;
367 extern AVImageFormat pbm_image_format;
368 extern AVImageFormat pgm_image_format;
369 extern AVImageFormat ppm_image_format;
370 extern AVImageFormat pam_image_format;
371 extern AVImageFormat pgmyuv_image_format;
372 extern AVImageFormat yuv_image_format;
373 #ifdef CONFIG_ZLIB
374 extern AVImageFormat png_image_format;
375 #endif
376 extern AVImageFormat jpeg_image_format;
377 extern AVImageFormat gif_image_format;
378 extern AVImageFormat sgi_image_format;
379
380 /* XXX: use automatic init with either ELF sections or C file parser */
381 /* modules */
382
383 /* mpeg.c */
384 extern AVInputFormat mpegps_demux;
385 int mpegps_init(void);
386
387 /* mpegts.c */
388 extern AVInputFormat mpegts_demux;
389 int mpegts_init(void);
390
391 /* rm.c */
392 int rm_init(void);
393
394 /* crc.c */
395 int crc_init(void);
396
397 /* img.c */
398 int img_init(void);
399
400 /* img2.c */
401 int img2_init(void);
402
403 /* asf.c */
404 int asf_init(void);
405
406 /* avienc.c */
407 int avienc_init(void);
408
409 /* avidec.c */
410 int avidec_init(void);
411
412 /* swf.c */
413 int swf_init(void);
414
415 /* mov.c */
416 int mov_init(void);
417
418 /* movenc.c */
419 int movenc_init(void);
420
421 /* flvenc.c */
422 int flvenc_init(void);
423
424 /* flvdec.c */
425 int flvdec_init(void);
426
427 /* jpeg.c */
428 int jpeg_init(void);
429
430 /* gif.c */
431 int gif_init(void);
432
433 /* au.c */
434 int au_init(void);
435
436 /* amr.c */
437 int amr_init(void);
438
439 /* wav.c */
440 int ff_wav_init(void);
441
442 /* raw.c */
443 int pcm_read_seek(AVFormatContext *s,
444 int stream_index, int64_t timestamp, int flags);
445 int raw_init(void);
446
447 /* mp3.c */
448 int mp3_init(void);
449
450 /* yuv4mpeg.c */
451 int yuv4mpeg_init(void);
452
453 /* ogg.c */
454 int ogg_init(void);
455
456 /* dv.c */
457 int ff_dv_init(void);
458
459 /* ffm.c */
460 int ffm_init(void);
461
462 /* rtsp.c */
463 extern AVInputFormat redir_demux;
464 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
465
466 /* 4xm.c */
467 int fourxm_init(void);
468
469 /* psxstr.c */
470 int str_init(void);
471
472 /* idroq.c */
473 int roq_init(void);
474
475 /* ipmovie.c */
476 int ipmovie_init(void);
477
478 /* nut.c */
479 int nut_init(void);
480
481 /* wc3movie.c */
482 int wc3_init(void);
483
484 /* westwood.c */
485 int westwood_init(void);
486
487 /* segafilm.c */
488 int film_init(void);
489
490 /* idcin.c */
491 int idcin_init(void);
492
493 /* flic.c */
494 int flic_init(void);
495
496 /* sierravmd.c */
497 int vmd_init(void);
498
499 /* matroska.c */
500 int matroska_init(void);
501
502 /* sol.c */
503 int sol_init(void);
504
505 #include "rtp.h"
506
507 #include "rtsp.h"
508
509 /* yuv4mpeg.c */
510 extern AVOutputFormat yuv4mpegpipe_oformat;
511
512 /* utils.c */
513 void av_register_input_format(AVInputFormat *format);
514 void av_register_output_format(AVOutputFormat *format);
515 AVOutputFormat *guess_stream_format(const char *short_name,
516 const char *filename, const char *mime_type);
517 AVOutputFormat *guess_format(const char *short_name,
518 const char *filename, const char *mime_type);
519
520 void av_hex_dump(FILE *f, uint8_t *buf, int size);
521 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
522
523 void av_register_all(void);
524
525 typedef struct FifoBuffer {
526 uint8_t *buffer;
527 uint8_t *rptr, *wptr, *end;
528 } FifoBuffer;
529
530 int fifo_init(FifoBuffer *f, int size);
531 void fifo_free(FifoBuffer *f);
532 int fifo_size(FifoBuffer *f, uint8_t *rptr);
533 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
534 void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
535 int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
536
537 /* media file input */
538 AVInputFormat *av_find_input_format(const char *short_name);
539 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
540 int av_open_input_stream(AVFormatContext **ic_ptr,
541 ByteIOContext *pb, const char *filename,
542 AVInputFormat *fmt, AVFormatParameters *ap);
543 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
544 AVInputFormat *fmt,
545 int buf_size,
546 AVFormatParameters *ap);
547 /* no av_open for output, so applications will need this: */
548 AVFormatContext *av_alloc_format_context(void);
549
550 #define AVERROR_UNKNOWN (-1) /* unknown error */
551 #define AVERROR_IO (-2) /* i/o error */
552 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
553 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
554 #define AVERROR_NOMEM (-5) /* not enough memory */
555 #define AVERROR_NOFMT (-6) /* unknown format */
556 #define AVERROR_NOTSUPP (-7) /* operation not supported */
557
558 int av_find_stream_info(AVFormatContext *ic);
559 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
560 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
561 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
562 int av_read_play(AVFormatContext *s);
563 int av_read_pause(AVFormatContext *s);
564 void av_close_input_file(AVFormatContext *s);
565 AVStream *av_new_stream(AVFormatContext *s, int id);
566 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
567 int pts_num, int pts_den);
568
569 #define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
570 #define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
571
572 int av_find_default_stream_index(AVFormatContext *s);
573 int av_index_search_timestamp(AVStream *st, int timestamp, int flags);
574 int av_add_index_entry(AVStream *st,
575 int64_t pos, int64_t timestamp, int distance, int flags);
576 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
577
578 /* media file output */
579 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
580 int av_write_header(AVFormatContext *s);
581 int av_write_frame(AVFormatContext *s, AVPacket *pkt);
582 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
583
584 int av_write_trailer(AVFormatContext *s);
585
586 void dump_format(AVFormatContext *ic,
587 int index,
588 const char *url,
589 int is_output);
590 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
591 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
592 int64_t parse_date(const char *datestr, int duration);
593
594 int64_t av_gettime(void);
595
596 /* ffm specific for ffserver */
597 #define FFM_PACKET_SIZE 4096
598 offset_t ffm_read_write_index(int fd);
599 void ffm_write_write_index(int fd, offset_t pos);
600 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
601
602 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
603
604 int get_frame_filename(char *buf, int buf_size,
605 const char *path, int number);
606 int filename_number_test(const char *filename);
607
608 /* grab specific */
609 int video_grab_init(void);
610 int audio_init(void);
611
612 /* DV1394 */
613 int dv1394_init(void);
614
615 #ifdef HAVE_AV_CONFIG_H
616
617 #include "os_support.h"
618
619 int strstart(const char *str, const char *val, const char **ptr);
620 int stristart(const char *str, const char *val, const char **ptr);
621 void pstrcpy(char *buf, int buf_size, const char *str);
622 char *pstrcat(char *buf, int buf_size, const char *s);
623
624 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
625
626 #ifdef __GNUC__
627 #define dynarray_add(tab, nb_ptr, elem)\
628 do {\
629 typeof(tab) _tab = (tab);\
630 typeof(elem) _elem = (elem);\
631 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
632 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
633 } while(0)
634 #else
635 #define dynarray_add(tab, nb_ptr, elem)\
636 do {\
637 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
638 } while(0)
639 #endif
640
641 time_t mktimegm(struct tm *tm);
642 struct tm *brktimegm(time_t secs, struct tm *tm);
643 const char *small_strptime(const char *p, const char *fmt,
644 struct tm *dt);
645
646 struct in_addr;
647 int resolve_host(struct in_addr *sin_addr, const char *hostname);
648
649 void url_split(char *proto, int proto_size,
650 char *authorization, int authorization_size,
651 char *hostname, int hostname_size,
652 int *port_ptr,
653 char *path, int path_size,
654 const char *url);
655
656 int match_ext(const char *filename, const char *extensions);
657
658 #endif /* HAVE_AV_CONFIG_H */
659
660 #ifdef __cplusplus
661 }
662 #endif
663
664 #endif /* AVFORMAT_H */