8 #define LIBAVFORMAT_BUILD 4617
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)
15 #include <stdio.h> /* FILE */
20 /* packet functions */
23 #define MAXINT64 int64_t_C(0x7fffffffffffffff)
27 #define MININT64 int64_t_C(0x8000000000000000)
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) */
39 int duration; /* presentation duration (0 if not available) */
40 void (*destruct)(struct AVPacket *);
43 #define PKT_FLAG_KEY 0x0001
45 void av_destruct_packet_nofree(AVPacket *pkt);
47 /* initialize optional fields of a packet */
48 static inline void av_init_packet(AVPacket *pkt)
50 pkt->pts = AV_NOPTS_VALUE;
51 pkt->dts = AV_NOPTS_VALUE;
54 pkt->stream_index = 0;
55 pkt->destruct= av_destruct_packet_nofree;
58 int av_new_packet(AVPacket *pkt, int size);
59 int av_dup_packet(AVPacket *pkt);
64 * @param pkt packet to free
66 static inline void av_free_packet(AVPacket *pkt)
68 if (pkt && pkt->destruct) {
73 /*************************************************/
74 /* fractional numbers for exact pts handling */
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;
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);
86 /*************************************************/
87 /* input/output formats */
89 struct AVFormatContext;
91 /* this structure contains the data a format has to probe a file */
92 typedef struct AVProbeData {
98 #define AVPROBE_SCORE_MAX 100
100 typedef struct AVFormatParameters {
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;
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
126 typedef struct AVOutputFormat {
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 */
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 */
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);
145 struct AVOutputFormat *next;
148 typedef struct AVInputFormat {
150 const char *long_name;
151 /* size of private data so that it can be allocated in the wrapper */
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 /* seek at or before a given timestamp (given in AV_TIME_BASE
169 units) relative to the frames in stream component stream_index */
170 int (*read_seek)(struct AVFormatContext *,
171 int stream_index, int64_t timestamp);
173 * gets the next timestamp in AV_TIME_BASE units.
175 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
176 int64_t *pos, int64_t pos_limit);
177 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
179 /* if extensions are defined, then no probe is done. You should
180 usually not use extension format guessing because it is not
182 const char *extensions;
183 /* general purpose read only value that the format can use */
186 /* start/resume playing - only meaningful if using a network based format
188 int (*read_play)(struct AVFormatContext *);
190 /* pause playing - only meaningful if using a network based format
192 int (*read_pause)(struct AVFormatContext *);
195 struct AVInputFormat *next;
198 typedef struct AVIndexEntry {
201 #define AVINDEX_KEYFRAME 0x0001
202 /* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
204 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
207 typedef struct AVStream {
208 int index; /* stream index in AVFormatContext */
209 int id; /* format specific stream id */
210 AVCodecContext codec; /* codec context */
211 int r_frame_rate; /* real frame rate of the stream */
212 int r_frame_rate_base;/* real frame rate base of the stream */
214 /* internal data used in av_find_stream_info() */
215 int64_t codec_info_duration;
216 int codec_info_nb_frames;
217 /* encoding: PTS generation when outputing stream */
219 AVRational time_base;
220 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
221 /* ffmpeg.c private use */
222 int stream_copy; /* if TRUE, just copy stream */
223 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
224 * MN:dunno if thats the right place, for it */
226 /* decoding: position of the first frame of the component, in
227 AV_TIME_BASE fractional seconds. */
229 /* decoding: duration of the stream, in AV_TIME_BASE fractional
233 /* av_read_frame() support */
235 struct AVCodecParserContext *parser;
238 int last_IP_duration;
240 /* av_seek_frame() support */
241 AVIndexEntry *index_entries; /* only used if the format does not
242 support seeking natively */
243 int nb_index_entries;
244 int index_entries_allocated_size;
247 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
248 (streams are added dynamically) */
250 #define MAX_STREAMS 20
252 /* format I/O context */
253 typedef struct AVFormatContext {
254 AVClass *av_class; /* set by av_alloc_format_context */
255 /* can only be iformat or oformat, not both at the same time */
256 struct AVInputFormat *iformat;
257 struct AVOutputFormat *oformat;
261 AVStream *streams[MAX_STREAMS];
262 char filename[1024]; /* input or output filename */
270 int year; /* ID3 year, 0 if none */
271 int track; /* track number, 0 if none */
272 char genre[32]; /* ID3 genre */
274 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
275 /* private data for pts handling (do not modify directly) */
276 /* This buffer is only needed when packets were already buffered but
277 not decoded, for example to get the codec parameters in mpeg
279 struct AVPacketList *packet_buffer;
281 /* decoding: position of the first frame of the component, in
282 AV_TIME_BASE fractional seconds. NEVER set this value directly:
283 it is deduced from the AVStream values. */
285 /* decoding: duration of the stream, in AV_TIME_BASE fractional
286 seconds. NEVER set this value directly: it is deduced from the
289 /* decoding: total file size. 0 if unknown */
291 /* decoding: total stream bitrate in bit/s, 0 if not
292 available. Never set it directly if the file_size and the
293 duration are known as ffmpeg can compute it automatically. */
296 /* av_read_frame() support */
298 const uint8_t *cur_ptr;
302 /* av_seek_frame() support */
303 int64_t data_offset; /* offset of the first packet */
307 typedef struct AVPacketList {
309 struct AVPacketList *next;
312 extern AVInputFormat *first_iformat;
313 extern AVOutputFormat *first_oformat;
315 /* still image support */
316 struct AVInputImageContext;
317 typedef struct AVInputImageContext AVInputImageContext;
319 typedef struct AVImageInfo {
320 enum PixelFormat pix_fmt; /* requested pixel format */
321 int width; /* requested width */
322 int height; /* requested height */
323 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
324 AVPicture pict; /* returned allocated image */
327 /* AVImageFormat.flags field constants */
328 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
330 typedef struct AVImageFormat {
332 const char *extensions;
333 /* tell if a given file has a chance of being parsing by this format */
334 int (*img_probe)(AVProbeData *);
335 /* read a whole image. 'alloc_cb' is called when the image size is
336 known so that the caller can allocate the image. If 'allo_cb'
337 returns non zero, then the parsing is aborted. Return '0' if
339 int (*img_read)(ByteIOContext *,
340 int (*alloc_cb)(void *, AVImageInfo *info), void *);
341 /* write the image */
342 int supported_pixel_formats; /* mask of supported formats for output */
343 int (*img_write)(ByteIOContext *, AVImageInfo *);
345 struct AVImageFormat *next;
348 void av_register_image_format(AVImageFormat *img_fmt);
349 AVImageFormat *av_probe_image_format(AVProbeData *pd);
350 AVImageFormat *guess_image_format(const char *filename);
351 int av_read_image(ByteIOContext *pb, const char *filename,
353 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
354 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
356 extern AVImageFormat *first_image_format;
358 extern AVImageFormat pnm_image_format;
359 extern AVImageFormat pbm_image_format;
360 extern AVImageFormat pgm_image_format;
361 extern AVImageFormat ppm_image_format;
362 extern AVImageFormat pam_image_format;
363 extern AVImageFormat pgmyuv_image_format;
364 extern AVImageFormat yuv_image_format;
366 extern AVImageFormat png_image_format;
368 extern AVImageFormat jpeg_image_format;
369 extern AVImageFormat gif_image_format;
370 extern AVImageFormat sgi_image_format;
372 /* XXX: use automatic init with either ELF sections or C file parser */
376 extern AVInputFormat mpegps_demux;
377 int mpegps_init(void);
380 extern AVInputFormat mpegts_demux;
381 int mpegts_init(void);
399 int avienc_init(void);
402 int avidec_init(void);
411 int movenc_init(void);
414 int flvenc_init(void);
417 int flvdec_init(void);
432 int ff_wav_init(void);
435 int pcm_read_seek(AVFormatContext *s,
436 int stream_index, int64_t timestamp);
443 int yuv4mpeg_init(void);
449 int ff_dv_init(void);
455 extern AVInputFormat redir_demux;
456 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
459 int fourxm_init(void);
468 int ipmovie_init(void);
477 int westwood_init(void);
483 int idcin_init(void);
492 int matroska_init(void);
502 extern AVOutputFormat yuv4mpegpipe_oformat;
505 void av_register_input_format(AVInputFormat *format);
506 void av_register_output_format(AVOutputFormat *format);
507 AVOutputFormat *guess_stream_format(const char *short_name,
508 const char *filename, const char *mime_type);
509 AVOutputFormat *guess_format(const char *short_name,
510 const char *filename, const char *mime_type);
512 void av_hex_dump(FILE *f, uint8_t *buf, int size);
513 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
515 void av_register_all(void);
517 typedef struct FifoBuffer {
519 uint8_t *rptr, *wptr, *end;
522 int fifo_init(FifoBuffer *f, int size);
523 void fifo_free(FifoBuffer *f);
524 int fifo_size(FifoBuffer *f, uint8_t *rptr);
525 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
526 void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
527 int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
529 /* media file input */
530 AVInputFormat *av_find_input_format(const char *short_name);
531 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
532 int av_open_input_stream(AVFormatContext **ic_ptr,
533 ByteIOContext *pb, const char *filename,
534 AVInputFormat *fmt, AVFormatParameters *ap);
535 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
538 AVFormatParameters *ap);
539 /* no av_open for output, so applications will need this: */
540 AVFormatContext *av_alloc_format_context(void);
542 #define AVERROR_UNKNOWN (-1) /* unknown error */
543 #define AVERROR_IO (-2) /* i/o error */
544 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
545 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
546 #define AVERROR_NOMEM (-5) /* not enough memory */
547 #define AVERROR_NOFMT (-6) /* unknown format */
548 #define AVERROR_NOTSUPP (-7) /* operation not supported */
550 int av_find_stream_info(AVFormatContext *ic);
551 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
552 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
553 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
554 int av_read_play(AVFormatContext *s);
555 int av_read_pause(AVFormatContext *s);
556 void av_close_input_file(AVFormatContext *s);
557 AVStream *av_new_stream(AVFormatContext *s, int id);
558 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
559 int pts_num, int pts_den);
561 int av_find_default_stream_index(AVFormatContext *s);
562 int av_index_search_timestamp(AVStream *st, int timestamp);
563 int av_add_index_entry(AVStream *st,
564 int64_t pos, int64_t timestamp, int distance, int flags);
565 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts);
567 /* media file output */
568 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
569 int av_write_header(AVFormatContext *s);
570 int av_write_frame(AVFormatContext *s, AVPacket *pkt);
571 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
573 int av_write_trailer(AVFormatContext *s);
575 void dump_format(AVFormatContext *ic,
579 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
580 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
581 int64_t parse_date(const char *datestr, int duration);
583 int64_t av_gettime(void);
585 /* ffm specific for ffserver */
586 #define FFM_PACKET_SIZE 4096
587 offset_t ffm_read_write_index(int fd);
588 void ffm_write_write_index(int fd, offset_t pos);
589 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
591 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
593 int get_frame_filename(char *buf, int buf_size,
594 const char *path, int number);
595 int filename_number_test(const char *filename);
598 int video_grab_init(void);
599 int audio_init(void);
602 int dv1394_init(void);
604 #ifdef HAVE_AV_CONFIG_H
606 #include "os_support.h"
608 int strstart(const char *str, const char *val, const char **ptr);
609 int stristart(const char *str, const char *val, const char **ptr);
610 void pstrcpy(char *buf, int buf_size, const char *str);
611 char *pstrcat(char *buf, int buf_size, const char *s);
613 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
616 #define dynarray_add(tab, nb_ptr, elem)\
618 typeof(tab) _tab = (tab);\
619 typeof(elem) _elem = (elem);\
620 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
621 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
624 #define dynarray_add(tab, nb_ptr, elem)\
626 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
630 time_t mktimegm(struct tm *tm);
631 struct tm *brktimegm(time_t secs, struct tm *tm);
632 const char *small_strptime(const char *p, const char *fmt,
636 int resolve_host(struct in_addr *sin_addr, const char *hostname);
638 void url_split(char *proto, int proto_size,
639 char *authorization, int authorization_size,
640 char *hostname, int hostname_size,
642 char *path, int path_size,
645 int match_ext(const char *filename, const char *extensions);
647 #endif /* HAVE_AV_CONFIG_H */
653 #endif /* AVFORMAT_H */