av_log() patch by (Michel Bardiaux <mbardiaux at peaktime dot be>)
[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 4611
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 *,
135 int stream_index,
136 const uint8_t *buf, int size, int64_t pts);
137 int (*write_trailer)(struct AVFormatContext *);
138 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
139 int flags;
140 /* currently only used to set pixel format if not YUV420P */
141 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
142 /* private fields */
143 struct AVOutputFormat *next;
144 } AVOutputFormat;
145
146 typedef struct AVInputFormat {
147 const char *name;
148 const char *long_name;
149 /* size of private data so that it can be allocated in the wrapper */
150 int priv_data_size;
151 /* tell if a given file has a chance of being parsing by this format */
152 int (*read_probe)(AVProbeData *);
153 /* read the format header and initialize the AVFormatContext
154 structure. Return 0 if OK. 'ap' if non NULL contains
155 additionnal paramters. Only used in raw format right
156 now. 'av_new_stream' should be called to create new streams. */
157 int (*read_header)(struct AVFormatContext *,
158 AVFormatParameters *ap);
159 /* read one packet and put it in 'pkt'. pts and flags are also
160 set. 'av_new_stream' can be called only if the flag
161 AVFMTCTX_NOHEADER is used. */
162 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
163 /* close the stream. The AVFormatContext and AVStreams are not
164 freed by this function */
165 int (*read_close)(struct AVFormatContext *);
166 /* seek at or before a given timestamp (given in AV_TIME_BASE
167 units) relative to the frames in stream component stream_index */
168 int (*read_seek)(struct AVFormatContext *,
169 int stream_index, int64_t timestamp);
170 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
171 int flags;
172 /* if extensions are defined, then no probe is done. You should
173 usually not use extension format guessing because it is not
174 reliable enough */
175 const char *extensions;
176 /* general purpose read only value that the format can use */
177 int value;
178
179 /* start/resume playing - only meaningful if using a network based format
180 (RTSP) */
181 int (*read_play)(struct AVFormatContext *);
182
183 /* pause playing - only meaningful if using a network based format
184 (RTSP) */
185 int (*read_pause)(struct AVFormatContext *);
186
187 /* private fields */
188 struct AVInputFormat *next;
189 } AVInputFormat;
190
191 typedef struct AVIndexEntry {
192 int64_t pos;
193 int64_t timestamp;
194 #define AVINDEX_KEYFRAME 0x0001
195 /* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
196 int flags;
197 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
198 } AVIndexEntry;
199
200 typedef struct AVStream {
201 int index; /* stream index in AVFormatContext */
202 int id; /* format specific stream id */
203 AVCodecContext codec; /* codec context */
204 int r_frame_rate; /* real frame rate of the stream */
205 int r_frame_rate_base;/* real frame rate base of the stream */
206 void *priv_data;
207 /* internal data used in av_find_stream_info() */
208 int64_t codec_info_duration;
209 int codec_info_nb_frames;
210 /* encoding: PTS generation when outputing stream */
211 AVFrac pts;
212 /* ffmpeg.c private use */
213 int stream_copy; /* if TRUE, just copy stream */
214 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
215 * MN:dunno if thats the right place, for it */
216 float quality;
217 /* decoding: position of the first frame of the component, in
218 AV_TIME_BASE fractional seconds. */
219 int64_t start_time;
220 /* decoding: duration of the stream, in AV_TIME_BASE fractional
221 seconds. */
222 int64_t duration;
223
224 /* av_read_frame() support */
225 int need_parsing;
226 struct AVCodecParserContext *parser;
227
228 int64_t cur_dts;
229 int last_IP_duration;
230 /* av_seek_frame() support */
231 AVIndexEntry *index_entries; /* only used if the format does not
232 support seeking natively */
233 int nb_index_entries;
234 int index_entries_allocated_size;
235 } AVStream;
236
237 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
238 (streams are added dynamically) */
239
240 #define MAX_STREAMS 20
241
242 /* format I/O context */
243 typedef struct AVFormatContext {
244 AVClass class; /* set by av_alloc_format_context */
245 /* can only be iformat or oformat, not both at the same time */
246 struct AVInputFormat *iformat;
247 struct AVOutputFormat *oformat;
248 void *priv_data;
249 ByteIOContext pb;
250 int nb_streams;
251 AVStream *streams[MAX_STREAMS];
252 char filename[1024]; /* input or output filename */
253 /* stream info */
254 char title[512];
255 char author[512];
256 char copyright[512];
257 char comment[512];
258 char album[512];
259 int year; /* ID3 year, 0 if none */
260 int track; /* track number, 0 if none */
261 char genre[32]; /* ID3 genre */
262
263 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
264 /* private data for pts handling (do not modify directly) */
265 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
266 int pts_num, pts_den; /* value to convert to seconds */
267 /* This buffer is only needed when packets were already buffered but
268 not decoded, for example to get the codec parameters in mpeg
269 streams */
270 struct AVPacketList *packet_buffer;
271
272 /* decoding: position of the first frame of the component, in
273 AV_TIME_BASE fractional seconds. NEVER set this value directly:
274 it is deduced from the AVStream values. */
275 int64_t start_time;
276 /* decoding: duration of the stream, in AV_TIME_BASE fractional
277 seconds. NEVER set this value directly: it is deduced from the
278 AVStream values. */
279 int64_t duration;
280 /* decoding: total file size. 0 if unknown */
281 int64_t file_size;
282 /* decoding: total stream bitrate in bit/s, 0 if not
283 available. Never set it directly if the file_size and the
284 duration are known as ffmpeg can compute it automatically. */
285 int bit_rate;
286
287 /* av_read_frame() support */
288 AVStream *cur_st;
289 const uint8_t *cur_ptr;
290 int cur_len;
291 AVPacket cur_pkt;
292
293 /* the following are used for pts/dts unit conversion */
294 int64_t last_pkt_stream_pts;
295 int64_t last_pkt_stream_dts;
296 int64_t last_pkt_pts;
297 int64_t last_pkt_dts;
298 int last_pkt_pts_frac;
299 int last_pkt_dts_frac;
300
301 /* av_seek_frame() support */
302 int64_t data_offset; /* offset of the first packet */
303 int index_built;
304 } AVFormatContext;
305
306 typedef struct AVPacketList {
307 AVPacket pkt;
308 struct AVPacketList *next;
309 } AVPacketList;
310
311 extern AVInputFormat *first_iformat;
312 extern AVOutputFormat *first_oformat;
313
314 /* still image support */
315 struct AVInputImageContext;
316 typedef struct AVInputImageContext AVInputImageContext;
317
318 typedef struct AVImageInfo {
319 enum PixelFormat pix_fmt; /* requested pixel format */
320 int width; /* requested width */
321 int height; /* requested height */
322 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
323 AVPicture pict; /* returned allocated image */
324 } AVImageInfo;
325
326 /* AVImageFormat.flags field constants */
327 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
328
329 typedef struct AVImageFormat {
330 const char *name;
331 const char *extensions;
332 /* tell if a given file has a chance of being parsing by this format */
333 int (*img_probe)(AVProbeData *);
334 /* read a whole image. 'alloc_cb' is called when the image size is
335 known so that the caller can allocate the image. If 'allo_cb'
336 returns non zero, then the parsing is aborted. Return '0' if
337 OK. */
338 int (*img_read)(ByteIOContext *,
339 int (*alloc_cb)(void *, AVImageInfo *info), void *);
340 /* write the image */
341 int supported_pixel_formats; /* mask of supported formats for output */
342 int (*img_write)(ByteIOContext *, AVImageInfo *);
343 int flags;
344 struct AVImageFormat *next;
345 } AVImageFormat;
346
347 void av_register_image_format(AVImageFormat *img_fmt);
348 AVImageFormat *av_probe_image_format(AVProbeData *pd);
349 AVImageFormat *guess_image_format(const char *filename);
350 int av_read_image(ByteIOContext *pb, const char *filename,
351 AVImageFormat *fmt,
352 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
353 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
354
355 extern AVImageFormat *first_image_format;
356
357 extern AVImageFormat pnm_image_format;
358 extern AVImageFormat pbm_image_format;
359 extern AVImageFormat pgm_image_format;
360 extern AVImageFormat ppm_image_format;
361 extern AVImageFormat pam_image_format;
362 extern AVImageFormat pgmyuv_image_format;
363 extern AVImageFormat yuv_image_format;
364 #ifdef CONFIG_ZLIB
365 extern AVImageFormat png_image_format;
366 #endif
367 extern AVImageFormat jpeg_image_format;
368 extern AVImageFormat gif_image_format;
369
370 /* XXX: use automatic init with either ELF sections or C file parser */
371 /* modules */
372
373 /* mpeg.c */
374 extern AVInputFormat mpegps_demux;
375 int mpegps_init(void);
376
377 /* mpegts.c */
378 extern AVInputFormat mpegts_demux;
379 int mpegts_init(void);
380
381 /* rm.c */
382 int rm_init(void);
383
384 /* crc.c */
385 int crc_init(void);
386
387 /* img.c */
388 int img_init(void);
389
390 /* asf.c */
391 int asf_init(void);
392
393 /* avienc.c */
394 int avienc_init(void);
395
396 /* avidec.c */
397 int avidec_init(void);
398
399 /* swf.c */
400 int swf_init(void);
401
402 /* mov.c */
403 int mov_init(void);
404
405 /* movenc.c */
406 int movenc_init(void);
407
408 /* flvenc.c */
409 int flvenc_init(void);
410
411 /* flvdec.c */
412 int flvdec_init(void);
413
414 /* jpeg.c */
415 int jpeg_init(void);
416
417 /* gif.c */
418 int gif_init(void);
419
420 /* au.c */
421 int au_init(void);
422
423 /* amr.c */
424 int amr_init(void);
425
426 /* wav.c */
427 int wav_init(void);
428
429 /* raw.c */
430 int pcm_read_seek(AVFormatContext *s,
431 int stream_index, int64_t timestamp);
432 int raw_init(void);
433
434 /* mp3.c */
435 int mp3_init(void);
436
437 /* yuv4mpeg.c */
438 int yuv4mpeg_init(void);
439
440 /* ogg.c */
441 int ogg_init(void);
442
443 /* dv.c */
444 int dv_init(void);
445
446 /* ffm.c */
447 int ffm_init(void);
448
449 /* rtsp.c */
450 extern AVInputFormat redir_demux;
451 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
452
453 /* 4xm.c */
454 int fourxm_init(void);
455
456 /* psxstr.c */
457 int str_init(void);
458
459 /* idroq.c */
460 int roq_init(void);
461
462 /* ipmovie.c */
463 int ipmovie_init(void);
464
465 /* nut.c */
466 int nut_init(void);
467
468 /* wc3movie.c */
469 int wc3_init(void);
470
471 /* westwood.c */
472 int westwood_init(void);
473
474 /* segafilm.c */
475 int film_init(void);
476
477 /* idcin.c */
478 int idcin_init(void);
479
480 /* flic.c */
481 int flic_init(void);
482
483 /* sierravmd.c */
484 int vmd_init(void);
485
486 #include "rtp.h"
487
488 #include "rtsp.h"
489
490 /* yuv4mpeg.c */
491 extern AVOutputFormat yuv4mpegpipe_oformat;
492
493 /* utils.c */
494 void av_register_input_format(AVInputFormat *format);
495 void av_register_output_format(AVOutputFormat *format);
496 AVOutputFormat *guess_stream_format(const char *short_name,
497 const char *filename, const char *mime_type);
498 AVOutputFormat *guess_format(const char *short_name,
499 const char *filename, const char *mime_type);
500
501 void av_hex_dump(FILE *f, uint8_t *buf, int size);
502 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
503
504 void av_register_all(void);
505
506 typedef struct FifoBuffer {
507 uint8_t *buffer;
508 uint8_t *rptr, *wptr, *end;
509 } FifoBuffer;
510
511 int fifo_init(FifoBuffer *f, int size);
512 void fifo_free(FifoBuffer *f);
513 int fifo_size(FifoBuffer *f, uint8_t *rptr);
514 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
515 void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
516
517 /* media file input */
518 AVInputFormat *av_find_input_format(const char *short_name);
519 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
520 int av_open_input_stream(AVFormatContext **ic_ptr,
521 ByteIOContext *pb, const char *filename,
522 AVInputFormat *fmt, AVFormatParameters *ap);
523 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
524 AVInputFormat *fmt,
525 int buf_size,
526 AVFormatParameters *ap);
527 /* no av_open for output, so applications will need this: */
528 AVFormatContext *av_alloc_format_context(void);
529
530 #define AVERROR_UNKNOWN (-1) /* unknown error */
531 #define AVERROR_IO (-2) /* i/o error */
532 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
533 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
534 #define AVERROR_NOMEM (-5) /* not enough memory */
535 #define AVERROR_NOFMT (-6) /* unknown format */
536 #define AVERROR_NOTSUPP (-7) /* operation not supported */
537
538 int av_find_stream_info(AVFormatContext *ic);
539 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
540 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
541 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
542 int av_read_play(AVFormatContext *s);
543 int av_read_pause(AVFormatContext *s);
544 void av_close_input_file(AVFormatContext *s);
545 AVStream *av_new_stream(AVFormatContext *s, int id);
546 void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
547 int pts_num, int pts_den);
548
549 int av_find_default_stream_index(AVFormatContext *s);
550 int av_index_search_timestamp(AVStream *st, int timestamp);
551 int av_add_index_entry(AVStream *st,
552 int64_t pos, int64_t timestamp, int distance, int flags);
553
554 /* media file output */
555 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
556 int av_write_header(AVFormatContext *s);
557 int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
558 int size);
559 int av_write_trailer(AVFormatContext *s);
560
561 void dump_format(AVFormatContext *ic,
562 int index,
563 const char *url,
564 int is_output);
565 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
566 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
567 int64_t parse_date(const char *datestr, int duration);
568
569 int64_t av_gettime(void);
570
571 /* ffm specific for ffserver */
572 #define FFM_PACKET_SIZE 4096
573 offset_t ffm_read_write_index(int fd);
574 void ffm_write_write_index(int fd, offset_t pos);
575 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
576
577 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
578
579 int get_frame_filename(char *buf, int buf_size,
580 const char *path, int number);
581 int filename_number_test(const char *filename);
582
583 /* grab specific */
584 int video_grab_init(void);
585 int audio_init(void);
586
587 /* DV1394 */
588 int dv1394_init(void);
589
590 #ifdef HAVE_AV_CONFIG_H
591
592 #include "os_support.h"
593
594 int strstart(const char *str, const char *val, const char **ptr);
595 int stristart(const char *str, const char *val, const char **ptr);
596 void pstrcpy(char *buf, int buf_size, const char *str);
597 char *pstrcat(char *buf, int buf_size, const char *s);
598
599 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
600
601 #ifdef __GNUC__
602 #define dynarray_add(tab, nb_ptr, elem)\
603 do {\
604 typeof(tab) _tab = (tab);\
605 typeof(elem) _elem = (elem);\
606 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
607 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
608 } while(0)
609 #else
610 #define dynarray_add(tab, nb_ptr, elem)\
611 do {\
612 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
613 } while(0)
614 #endif
615
616 time_t mktimegm(struct tm *tm);
617 const char *small_strptime(const char *p, const char *fmt,
618 struct tm *dt);
619
620 struct in_addr;
621 int resolve_host(struct in_addr *sin_addr, const char *hostname);
622
623 void url_split(char *proto, int proto_size,
624 char *hostname, int hostname_size,
625 int *port_ptr,
626 char *path, int path_size,
627 const char *url);
628
629 int match_ext(const char *filename, const char *extensions);
630
631 #endif /* HAVE_AV_CONFIG_H */
632
633 #ifdef __cplusplus
634 }
635 #endif
636
637 #endif /* AVFORMAT_H */