5f2e56c67b0d89822de3e1fdb686b9f83223dff0
[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 4616
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 /* initialize optional fields of a packet */
46 static inline void av_init_packet(AVPacket *pkt)
47 {
48 pkt->pts = AV_NOPTS_VALUE;
49 pkt->dts = AV_NOPTS_VALUE;
50 pkt->duration = 0;
51 pkt->flags = 0;
52 pkt->stream_index = 0;
53 }
54
55 int av_new_packet(AVPacket *pkt, int size);
56 int av_dup_packet(AVPacket *pkt);
57
58 /**
59 * Free a packet
60 *
61 * @param pkt packet to free
62 */
63 static inline void av_free_packet(AVPacket *pkt)
64 {
65 if (pkt && pkt->destruct) {
66 pkt->destruct(pkt);
67 }
68 }
69
70 /*************************************************/
71 /* fractional numbers for exact pts handling */
72
73 /* the exact value of the fractional number is: 'val + num / den'. num
74 is assumed to be such as 0 <= num < den */
75 typedef struct AVFrac {
76 int64_t val, num, den;
77 } AVFrac;
78
79 void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
80 void av_frac_add(AVFrac *f, int64_t incr);
81 void av_frac_set(AVFrac *f, int64_t val);
82
83 /*************************************************/
84 /* input/output formats */
85
86 struct AVFormatContext;
87
88 /* this structure contains the data a format has to probe a file */
89 typedef struct AVProbeData {
90 const char *filename;
91 unsigned char *buf;
92 int buf_size;
93 } AVProbeData;
94
95 #define AVPROBE_SCORE_MAX 100
96
97 typedef struct AVFormatParameters {
98 int frame_rate;
99 int frame_rate_base;
100 int sample_rate;
101 int channels;
102 int width;
103 int height;
104 enum PixelFormat pix_fmt;
105 struct AVImageFormat *image_format;
106 int channel; /* used to select dv channel */
107 const char *device; /* video4linux, audio or DV device */
108 const char *standard; /* tv standard, NTSC, PAL, SECAM */
109 int mpeg2ts_raw:1; /* force raw MPEG2 transport stream output, if possible */
110 int mpeg2ts_compute_pcr:1; /* compute exact PCR for each transport
111 stream packet (only meaningful if
112 mpeg2ts_raw is TRUE */
113 int initial_pause:1; /* do not begin to play the stream
114 immediately (RTSP only) */
115 } AVFormatParameters;
116
117 #define AVFMT_NOFILE 0x0001 /* no file should be opened */
118 #define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
119 #define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
120 #define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
121 raw picture data */
122
123 typedef struct AVOutputFormat {
124 const char *name;
125 const char *long_name;
126 const char *mime_type;
127 const char *extensions; /* comma separated extensions */
128 /* size of private data so that it can be allocated in the wrapper */
129 int priv_data_size;
130 /* output support */
131 enum CodecID audio_codec; /* default audio codec */
132 enum CodecID video_codec; /* default video codec */
133 int (*write_header)(struct AVFormatContext *);
134 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
135 int (*write_trailer)(struct AVFormatContext *);
136 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
137 int flags;
138 /* currently only used to set pixel format if not YUV420P */
139 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
140 /* private fields */
141 struct AVOutputFormat *next;
142 } AVOutputFormat;
143
144 typedef struct AVInputFormat {
145 const char *name;
146 const char *long_name;
147 /* size of private data so that it can be allocated in the wrapper */
148 int priv_data_size;
149 /* tell if a given file has a chance of being parsing by this format */
150 int (*read_probe)(AVProbeData *);
151 /* read the format header and initialize the AVFormatContext
152 structure. Return 0 if OK. 'ap' if non NULL contains
153 additionnal paramters. Only used in raw format right
154 now. 'av_new_stream' should be called to create new streams. */
155 int (*read_header)(struct AVFormatContext *,
156 AVFormatParameters *ap);
157 /* read one packet and put it in 'pkt'. pts and flags are also
158 set. 'av_new_stream' can be called only if the flag
159 AVFMTCTX_NOHEADER is used. */
160 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
161 /* close the stream. The AVFormatContext and AVStreams are not
162 freed by this function */
163 int (*read_close)(struct AVFormatContext *);
164 /* seek at or before a given timestamp (given in AV_TIME_BASE
165 units) relative to the frames in stream component stream_index */
166 int (*read_seek)(struct AVFormatContext *,
167 int stream_index, int64_t timestamp);
168 /**
169 * gets the next timestamp in AV_TIME_BASE units.
170 */
171 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
172 int64_t *pos, int64_t pos_limit);
173 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
174 int flags;
175 /* if extensions are defined, then no probe is done. You should
176 usually not use extension format guessing because it is not
177 reliable enough */
178 const char *extensions;
179 /* general purpose read only value that the format can use */
180 int value;
181
182 /* start/resume playing - only meaningful if using a network based format
183 (RTSP) */
184 int (*read_play)(struct AVFormatContext *);
185
186 /* pause playing - only meaningful if using a network based format
187 (RTSP) */
188 int (*read_pause)(struct AVFormatContext *);
189
190 /* private fields */
191 struct AVInputFormat *next;
192 } AVInputFormat;
193
194 typedef struct AVIndexEntry {
195 int64_t pos;
196 int64_t timestamp;
197 #define AVINDEX_KEYFRAME 0x0001
198 /* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
199 int flags;
200 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
201 } AVIndexEntry;
202
203 typedef struct AVStream {
204 int index; /* stream index in AVFormatContext */
205 int id; /* format specific stream id */
206 AVCodecContext codec; /* codec context */
207 int r_frame_rate; /* real frame rate of the stream */
208 int r_frame_rate_base;/* real frame rate base of the stream */
209 void *priv_data;
210 /* internal data used in av_find_stream_info() */
211 int64_t codec_info_duration;
212 int codec_info_nb_frames;
213 /* encoding: PTS generation when outputing stream */
214 AVFrac pts;
215 AVRational time_base;
216 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
217 /* ffmpeg.c private use */
218 int stream_copy; /* if TRUE, just copy stream */
219 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
220 * MN:dunno if thats the right place, for it */
221 float quality;
222 /* decoding: position of the first frame of the component, in
223 AV_TIME_BASE fractional seconds. */
224 int64_t start_time;
225 /* decoding: duration of the stream, in AV_TIME_BASE fractional
226 seconds. */
227 int64_t duration;
228
229 /* av_read_frame() support */
230 int need_parsing;
231 struct AVCodecParserContext *parser;
232
233 int64_t cur_dts;
234 int last_IP_duration;
235 int64_t last_IP_pts;
236 /* av_seek_frame() support */
237 AVIndexEntry *index_entries; /* only used if the format does not
238 support seeking natively */
239 int nb_index_entries;
240 int index_entries_allocated_size;
241 } AVStream;
242
243 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
244 (streams are added dynamically) */
245
246 #define MAX_STREAMS 20
247
248 /* format I/O context */
249 typedef struct AVFormatContext {
250 AVClass *av_class; /* set by av_alloc_format_context */
251 /* can only be iformat or oformat, not both at the same time */
252 struct AVInputFormat *iformat;
253 struct AVOutputFormat *oformat;
254 void *priv_data;
255 ByteIOContext pb;
256 int nb_streams;
257 AVStream *streams[MAX_STREAMS];
258 char filename[1024]; /* input or output filename */
259 /* stream info */
260 int64_t timestamp;
261 char title[512];
262 char author[512];
263 char copyright[512];
264 char comment[512];
265 char album[512];
266 int year; /* ID3 year, 0 if none */
267 int track; /* track number, 0 if none */
268 char genre[32]; /* ID3 genre */
269
270 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
271 /* private data for pts handling (do not modify directly) */
272 /* This buffer is only needed when packets were already buffered but
273 not decoded, for example to get the codec parameters in mpeg
274 streams */
275 struct AVPacketList *packet_buffer;
276
277 /* decoding: position of the first frame of the component, in
278 AV_TIME_BASE fractional seconds. NEVER set this value directly:
279 it is deduced from the AVStream values. */
280 int64_t start_time;
281 /* decoding: duration of the stream, in AV_TIME_BASE fractional
282 seconds. NEVER set this value directly: it is deduced from the
283 AVStream values. */
284 int64_t duration;
285 /* decoding: total file size. 0 if unknown */
286 int64_t file_size;
287 /* decoding: total stream bitrate in bit/s, 0 if not
288 available. Never set it directly if the file_size and the
289 duration are known as ffmpeg can compute it automatically. */
290 int bit_rate;
291
292 /* av_read_frame() support */
293 AVStream *cur_st;
294 const uint8_t *cur_ptr;
295 int cur_len;
296 AVPacket cur_pkt;
297
298 /* av_seek_frame() support */
299 int64_t data_offset; /* offset of the first packet */
300 int index_built;
301 } AVFormatContext;
302
303 typedef struct AVPacketList {
304 AVPacket pkt;
305 struct AVPacketList *next;
306 } AVPacketList;
307
308 extern AVInputFormat *first_iformat;
309 extern AVOutputFormat *first_oformat;
310
311 /* still image support */
312 struct AVInputImageContext;
313 typedef struct AVInputImageContext AVInputImageContext;
314
315 typedef struct AVImageInfo {
316 enum PixelFormat pix_fmt; /* requested pixel format */
317 int width; /* requested width */
318 int height; /* requested height */
319 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
320 AVPicture pict; /* returned allocated image */
321 } AVImageInfo;
322
323 /* AVImageFormat.flags field constants */
324 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
325
326 typedef struct AVImageFormat {
327 const char *name;
328 const char *extensions;
329 /* tell if a given file has a chance of being parsing by this format */
330 int (*img_probe)(AVProbeData *);
331 /* read a whole image. 'alloc_cb' is called when the image size is
332 known so that the caller can allocate the image. If 'allo_cb'
333 returns non zero, then the parsing is aborted. Return '0' if
334 OK. */
335 int (*img_read)(ByteIOContext *,
336 int (*alloc_cb)(void *, AVImageInfo *info), void *);
337 /* write the image */
338 int supported_pixel_formats; /* mask of supported formats for output */
339 int (*img_write)(ByteIOContext *, AVImageInfo *);
340 int flags;
341 struct AVImageFormat *next;
342 } AVImageFormat;
343
344 void av_register_image_format(AVImageFormat *img_fmt);
345 AVImageFormat *av_probe_image_format(AVProbeData *pd);
346 AVImageFormat *guess_image_format(const char *filename);
347 int av_read_image(ByteIOContext *pb, const char *filename,
348 AVImageFormat *fmt,
349 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
350 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
351
352 extern AVImageFormat *first_image_format;
353
354 extern AVImageFormat pnm_image_format;
355 extern AVImageFormat pbm_image_format;
356 extern AVImageFormat pgm_image_format;
357 extern AVImageFormat ppm_image_format;
358 extern AVImageFormat pam_image_format;
359 extern AVImageFormat pgmyuv_image_format;
360 extern AVImageFormat yuv_image_format;
361 #ifdef CONFIG_ZLIB
362 extern AVImageFormat png_image_format;
363 #endif
364 extern AVImageFormat jpeg_image_format;
365 extern AVImageFormat gif_image_format;
366 extern AVImageFormat sgi_image_format;
367
368 /* XXX: use automatic init with either ELF sections or C file parser */
369 /* modules */
370
371 /* mpeg.c */
372 extern AVInputFormat mpegps_demux;
373 int mpegps_init(void);
374
375 /* mpegts.c */
376 extern AVInputFormat mpegts_demux;
377 int mpegts_init(void);
378
379 /* rm.c */
380 int rm_init(void);
381
382 /* crc.c */
383 int crc_init(void);
384
385 /* img.c */
386 int img_init(void);
387
388 /* img2.c */
389 int img2_init(void);
390
391 /* asf.c */
392 int asf_init(void);
393
394 /* avienc.c */
395 int avienc_init(void);
396
397 /* avidec.c */
398 int avidec_init(void);
399
400 /* swf.c */
401 int swf_init(void);
402
403 /* mov.c */
404 int mov_init(void);
405
406 /* movenc.c */
407 int movenc_init(void);
408
409 /* flvenc.c */
410 int flvenc_init(void);
411
412 /* flvdec.c */
413 int flvdec_init(void);
414
415 /* jpeg.c */
416 int jpeg_init(void);
417
418 /* gif.c */
419 int gif_init(void);
420
421 /* au.c */
422 int au_init(void);
423
424 /* amr.c */
425 int amr_init(void);
426
427 /* wav.c */
428 int ff_wav_init(void);
429
430 /* raw.c */
431 int pcm_read_seek(AVFormatContext *s,
432 int stream_index, int64_t timestamp);
433 int raw_init(void);
434
435 /* mp3.c */
436 int mp3_init(void);
437
438 /* yuv4mpeg.c */
439 int yuv4mpeg_init(void);
440
441 /* ogg.c */
442 int ogg_init(void);
443
444 /* dv.c */
445 int ff_dv_init(void);
446
447 /* ffm.c */
448 int ffm_init(void);
449
450 /* rtsp.c */
451 extern AVInputFormat redir_demux;
452 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
453
454 /* 4xm.c */
455 int fourxm_init(void);
456
457 /* psxstr.c */
458 int str_init(void);
459
460 /* idroq.c */
461 int roq_init(void);
462
463 /* ipmovie.c */
464 int ipmovie_init(void);
465
466 /* nut.c */
467 int nut_init(void);
468
469 /* wc3movie.c */
470 int wc3_init(void);
471
472 /* westwood.c */
473 int westwood_init(void);
474
475 /* segafilm.c */
476 int film_init(void);
477
478 /* idcin.c */
479 int idcin_init(void);
480
481 /* flic.c */
482 int flic_init(void);
483
484 /* sierravmd.c */
485 int vmd_init(void);
486
487 /* matroska.c */
488 int matroska_init(void);
489
490 #include "rtp.h"
491
492 #include "rtsp.h"
493
494 /* yuv4mpeg.c */
495 extern AVOutputFormat yuv4mpegpipe_oformat;
496
497 /* utils.c */
498 void av_register_input_format(AVInputFormat *format);
499 void av_register_output_format(AVOutputFormat *format);
500 AVOutputFormat *guess_stream_format(const char *short_name,
501 const char *filename, const char *mime_type);
502 AVOutputFormat *guess_format(const char *short_name,
503 const char *filename, const char *mime_type);
504
505 void av_hex_dump(FILE *f, uint8_t *buf, int size);
506 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
507
508 void av_register_all(void);
509
510 typedef struct FifoBuffer {
511 uint8_t *buffer;
512 uint8_t *rptr, *wptr, *end;
513 } FifoBuffer;
514
515 int fifo_init(FifoBuffer *f, int size);
516 void fifo_free(FifoBuffer *f);
517 int fifo_size(FifoBuffer *f, uint8_t *rptr);
518 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
519 void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
520
521 /* media file input */
522 AVInputFormat *av_find_input_format(const char *short_name);
523 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
524 int av_open_input_stream(AVFormatContext **ic_ptr,
525 ByteIOContext *pb, const char *filename,
526 AVInputFormat *fmt, AVFormatParameters *ap);
527 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
528 AVInputFormat *fmt,
529 int buf_size,
530 AVFormatParameters *ap);
531 /* no av_open for output, so applications will need this: */
532 AVFormatContext *av_alloc_format_context(void);
533
534 #define AVERROR_UNKNOWN (-1) /* unknown error */
535 #define AVERROR_IO (-2) /* i/o error */
536 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
537 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
538 #define AVERROR_NOMEM (-5) /* not enough memory */
539 #define AVERROR_NOFMT (-6) /* unknown format */
540 #define AVERROR_NOTSUPP (-7) /* operation not supported */
541
542 int av_find_stream_info(AVFormatContext *ic);
543 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
544 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
545 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
546 int av_read_play(AVFormatContext *s);
547 int av_read_pause(AVFormatContext *s);
548 void av_close_input_file(AVFormatContext *s);
549 AVStream *av_new_stream(AVFormatContext *s, int id);
550 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
551 int pts_num, int pts_den);
552
553 int av_find_default_stream_index(AVFormatContext *s);
554 int av_index_search_timestamp(AVStream *st, int timestamp);
555 int av_add_index_entry(AVStream *st,
556 int64_t pos, int64_t timestamp, int distance, int flags);
557 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts);
558
559 /* media file output */
560 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
561 int av_write_header(AVFormatContext *s);
562 int av_write_frame(AVFormatContext *s, AVPacket *pkt);
563 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
564
565 int av_write_trailer(AVFormatContext *s);
566
567 void dump_format(AVFormatContext *ic,
568 int index,
569 const char *url,
570 int is_output);
571 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
572 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
573 int64_t parse_date(const char *datestr, int duration);
574
575 int64_t av_gettime(void);
576
577 /* ffm specific for ffserver */
578 #define FFM_PACKET_SIZE 4096
579 offset_t ffm_read_write_index(int fd);
580 void ffm_write_write_index(int fd, offset_t pos);
581 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
582
583 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
584
585 int get_frame_filename(char *buf, int buf_size,
586 const char *path, int number);
587 int filename_number_test(const char *filename);
588
589 /* grab specific */
590 int video_grab_init(void);
591 int audio_init(void);
592
593 /* DV1394 */
594 int dv1394_init(void);
595
596 #ifdef HAVE_AV_CONFIG_H
597
598 #include "os_support.h"
599
600 int strstart(const char *str, const char *val, const char **ptr);
601 int stristart(const char *str, const char *val, const char **ptr);
602 void pstrcpy(char *buf, int buf_size, const char *str);
603 char *pstrcat(char *buf, int buf_size, const char *s);
604
605 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
606
607 #ifdef __GNUC__
608 #define dynarray_add(tab, nb_ptr, elem)\
609 do {\
610 typeof(tab) _tab = (tab);\
611 typeof(elem) _elem = (elem);\
612 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
613 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
614 } while(0)
615 #else
616 #define dynarray_add(tab, nb_ptr, elem)\
617 do {\
618 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
619 } while(0)
620 #endif
621
622 time_t mktimegm(struct tm *tm);
623 const char *small_strptime(const char *p, const char *fmt,
624 struct tm *dt);
625
626 struct in_addr;
627 int resolve_host(struct in_addr *sin_addr, const char *hostname);
628
629 void url_split(char *proto, int proto_size,
630 char *authorization, int authorization_size,
631 char *hostname, int hostname_size,
632 int *port_ptr,
633 char *path, int path_size,
634 const char *url);
635
636 int match_ext(const char *filename, const char *extensions);
637
638 #endif /* HAVE_AV_CONFIG_H */
639
640 #ifdef __cplusplus
641 }
642 #endif
643
644 #endif /* AVFORMAT_H */