8 #define LIBAVFORMAT_BUILD 4626
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 time_base units
32 int64_t dts; ///< decompression time stamp in time_base units
37 int duration; ///< presentation duration in time_base units (0 if not available)
38 void (*destruct)(struct AVPacket *);
40 int64_t pos; ///< byte position in stream, -1 if unknown
42 #define PKT_FLAG_KEY 0x0001
44 void av_destruct_packet_nofree(AVPacket *pkt);
46 /* initialize optional fields of a packet */
47 static inline void av_init_packet(AVPacket *pkt)
49 pkt->pts = AV_NOPTS_VALUE;
50 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_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
60 int av_dup_packet(AVPacket *pkt);
65 * @param pkt packet to free
67 static inline void av_free_packet(AVPacket *pkt)
69 if (pkt && pkt->destruct) {
74 /*************************************************/
75 /* fractional numbers for exact pts handling */
77 /* the exact value of the fractional number is: 'val + num / den'. num
78 is assumed to be such as 0 <= num < den */
79 typedef struct AVFrac {
80 int64_t val, num, den;
83 void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den);
84 void av_frac_add(AVFrac *f, int64_t incr);
85 void av_frac_set(AVFrac *f, int64_t val);
87 /*************************************************/
88 /* input/output formats */
90 struct AVFormatContext;
92 /* this structure contains the data a format has to probe a file */
93 typedef struct AVProbeData {
99 #define AVPROBE_SCORE_MAX 100
101 typedef struct AVFormatParameters {
102 AVRational time_base;
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 enum CodecID video_codec_id;
119 enum CodecID audio_codec_id;
120 } AVFormatParameters;
122 #define AVFMT_NOFILE 0x0001 /* no file should be opened */
123 #define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
124 #define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
125 #define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
127 #define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
129 typedef struct AVOutputFormat {
131 const char *long_name;
132 const char *mime_type;
133 const char *extensions; /* comma separated extensions */
134 /* size of private data so that it can be allocated in the wrapper */
137 enum CodecID audio_codec; /* default audio codec */
138 enum CodecID video_codec; /* default video codec */
139 int (*write_header)(struct AVFormatContext *);
140 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
141 int (*write_trailer)(struct AVFormatContext *);
142 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
144 /* currently only used to set pixel format if not YUV420P */
145 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
146 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
148 struct AVOutputFormat *next;
151 typedef struct AVInputFormat {
153 const char *long_name;
154 /* size of private data so that it can be allocated in the wrapper */
156 /* tell if a given file has a chance of being parsing by this format */
157 int (*read_probe)(AVProbeData *);
158 /* read the format header and initialize the AVFormatContext
159 structure. Return 0 if OK. 'ap' if non NULL contains
160 additionnal paramters. Only used in raw format right
161 now. 'av_new_stream' should be called to create new streams. */
162 int (*read_header)(struct AVFormatContext *,
163 AVFormatParameters *ap);
164 /* read one packet and put it in 'pkt'. pts and flags are also
165 set. 'av_new_stream' can be called only if the flag
166 AVFMTCTX_NOHEADER is used. */
167 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
168 /* close the stream. The AVFormatContext and AVStreams are not
169 freed by this function */
170 int (*read_close)(struct AVFormatContext *);
172 * seek to a given timestamp relative to the frames in
173 * stream component stream_index
174 * @param stream_index must not be -1
175 * @param flags selects which direction should be preferred if no exact
178 int (*read_seek)(struct AVFormatContext *,
179 int stream_index, int64_t timestamp, int flags);
181 * gets the next timestamp in AV_TIME_BASE units.
183 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
184 int64_t *pos, int64_t pos_limit);
185 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
187 /* if extensions are defined, then no probe is done. You should
188 usually not use extension format guessing because it is not
190 const char *extensions;
191 /* general purpose read only value that the format can use */
194 /* start/resume playing - only meaningful if using a network based format
196 int (*read_play)(struct AVFormatContext *);
198 /* pause playing - only meaningful if using a network based format
200 int (*read_pause)(struct AVFormatContext *);
203 struct AVInputFormat *next;
206 typedef struct AVIndexEntry {
209 #define AVINDEX_KEYFRAME 0x0001
210 /* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
212 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
216 //we leave some space between them for extensions (drop some keyframes for intra only or drop just some bidir frames)
217 AVDISCARD_NONE =-16, ///< discard nothing
218 AVDISCARD_DEFAULT= 0, ///< discard useless packets like 0 size packets in avi
219 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
220 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
221 AVDISCARD_ALL = 48, ///< discard all
224 typedef struct AVStream {
225 int index; /* stream index in AVFormatContext */
226 int id; /* format specific stream id */
227 AVCodecContext codec; /* codec context */
228 AVRational r_frame_rate; /* real frame rate of the stream */
230 /* internal data used in av_find_stream_info() */
231 int64_t codec_info_duration;
232 int codec_info_nb_frames;
233 /* encoding: PTS generation when outputing stream */
235 AVRational time_base;
236 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
237 /* ffmpeg.c private use */
238 int stream_copy; /* if TRUE, just copy stream */
239 enum AVDiscard discard; ///< selects which packets can be discarded at will and dont need to be demuxed
240 //FIXME move stuff to a flags field?
241 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
242 * MN:dunno if thats the right place, for it */
244 /* decoding: position of the first frame of the component, in
245 AV_TIME_BASE fractional seconds. */
247 /* decoding: duration of the stream, in AV_TIME_BASE fractional
251 char language[4]; /* ISO 639 3-letter language code (empty string if undefined) */
253 /* av_read_frame() support */
255 struct AVCodecParserContext *parser;
258 int last_IP_duration;
260 /* av_seek_frame() support */
261 AVIndexEntry *index_entries; /* only used if the format does not
262 support seeking natively */
263 int nb_index_entries;
264 int index_entries_allocated_size;
267 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
268 (streams are added dynamically) */
270 #define MAX_STREAMS 20
272 /* format I/O context */
273 typedef struct AVFormatContext {
274 const AVClass *av_class; /* set by av_alloc_format_context */
275 /* can only be iformat or oformat, not both at the same time */
276 struct AVInputFormat *iformat;
277 struct AVOutputFormat *oformat;
281 AVStream *streams[MAX_STREAMS];
282 char filename[1024]; /* input or output filename */
290 int year; /* ID3 year, 0 if none */
291 int track; /* track number, 0 if none */
292 char genre[32]; /* ID3 genre */
294 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
295 /* private data for pts handling (do not modify directly) */
296 /* This buffer is only needed when packets were already buffered but
297 not decoded, for example to get the codec parameters in mpeg
299 struct AVPacketList *packet_buffer;
301 /* decoding: position of the first frame of the component, in
302 AV_TIME_BASE fractional seconds. NEVER set this value directly:
303 it is deduced from the AVStream values. */
305 /* decoding: duration of the stream, in AV_TIME_BASE fractional
306 seconds. NEVER set this value directly: it is deduced from the
309 /* decoding: total file size. 0 if unknown */
311 /* decoding: total stream bitrate in bit/s, 0 if not
312 available. Never set it directly if the file_size and the
313 duration are known as ffmpeg can compute it automatically. */
316 /* av_read_frame() support */
318 const uint8_t *cur_ptr;
322 /* av_seek_frame() support */
323 int64_t data_offset; /* offset of the first packet */
332 typedef struct AVPacketList {
334 struct AVPacketList *next;
337 extern AVInputFormat *first_iformat;
338 extern AVOutputFormat *first_oformat;
340 /* still image support */
341 struct AVInputImageContext;
342 typedef struct AVInputImageContext AVInputImageContext;
344 typedef struct AVImageInfo {
345 enum PixelFormat pix_fmt; /* requested pixel format */
346 int width; /* requested width */
347 int height; /* requested height */
348 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
349 AVPicture pict; /* returned allocated image */
352 /* AVImageFormat.flags field constants */
353 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
355 typedef struct AVImageFormat {
357 const char *extensions;
358 /* tell if a given file has a chance of being parsing by this format */
359 int (*img_probe)(AVProbeData *);
360 /* read a whole image. 'alloc_cb' is called when the image size is
361 known so that the caller can allocate the image. If 'allo_cb'
362 returns non zero, then the parsing is aborted. Return '0' if
364 int (*img_read)(ByteIOContext *,
365 int (*alloc_cb)(void *, AVImageInfo *info), void *);
366 /* write the image */
367 int supported_pixel_formats; /* mask of supported formats for output */
368 int (*img_write)(ByteIOContext *, AVImageInfo *);
370 struct AVImageFormat *next;
373 void av_register_image_format(AVImageFormat *img_fmt);
374 AVImageFormat *av_probe_image_format(AVProbeData *pd);
375 AVImageFormat *guess_image_format(const char *filename);
376 enum CodecID av_guess_image2_codec(const char *filename);
377 int av_read_image(ByteIOContext *pb, const char *filename,
379 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
380 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
382 extern AVImageFormat *first_image_format;
384 extern AVImageFormat pnm_image_format;
385 extern AVImageFormat pbm_image_format;
386 extern AVImageFormat pgm_image_format;
387 extern AVImageFormat ppm_image_format;
388 extern AVImageFormat pam_image_format;
389 extern AVImageFormat pgmyuv_image_format;
390 extern AVImageFormat yuv_image_format;
392 extern AVImageFormat png_image_format;
394 extern AVImageFormat jpeg_image_format;
395 extern AVImageFormat gif_image_format;
396 extern AVImageFormat sgi_image_format;
398 /* XXX: use automatic init with either ELF sections or C file parser */
402 extern AVInputFormat mpegps_demux;
403 int mpegps_init(void);
406 extern AVInputFormat mpegts_demux;
407 int mpegts_init(void);
425 int avienc_init(void);
428 int avidec_init(void);
437 int movenc_init(void);
440 int flvenc_init(void);
443 int flvdec_init(void);
458 int ff_wav_init(void);
461 int pcm_read_seek(AVFormatContext *s,
462 int stream_index, int64_t timestamp, int flags);
469 int yuv4mpeg_init(void);
475 int libogg_init(void);
478 int ff_dv_init(void);
484 extern AVInputFormat redir_demux;
485 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
488 int fourxm_init(void);
497 int ipmovie_init(void);
506 int westwood_init(void);
512 int idcin_init(void);
521 int matroska_init(void);
526 /* electronicarts.c */
530 int nsvdec_init(void);
537 extern AVOutputFormat yuv4mpegpipe_oformat;
540 void av_register_input_format(AVInputFormat *format);
541 void av_register_output_format(AVOutputFormat *format);
542 AVOutputFormat *guess_stream_format(const char *short_name,
543 const char *filename, const char *mime_type);
544 AVOutputFormat *guess_format(const char *short_name,
545 const char *filename, const char *mime_type);
546 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
547 const char *filename, const char *mime_type, enum CodecType type);
549 void av_hex_dump(FILE *f, uint8_t *buf, int size);
550 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
552 void av_register_all(void);
554 typedef struct FifoBuffer {
556 uint8_t *rptr, *wptr, *end;
559 int fifo_init(FifoBuffer *f, int size);
560 void fifo_free(FifoBuffer *f);
561 int fifo_size(FifoBuffer *f, uint8_t *rptr);
562 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
563 void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
564 int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
565 void fifo_realloc(FifoBuffer *f, unsigned int size);
567 /* media file input */
568 AVInputFormat *av_find_input_format(const char *short_name);
569 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
570 int av_open_input_stream(AVFormatContext **ic_ptr,
571 ByteIOContext *pb, const char *filename,
572 AVInputFormat *fmt, AVFormatParameters *ap);
573 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
576 AVFormatParameters *ap);
577 /* no av_open for output, so applications will need this: */
578 AVFormatContext *av_alloc_format_context(void);
580 #define AVERROR_UNKNOWN (-1) /* unknown error */
581 #define AVERROR_IO (-2) /* i/o error */
582 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
583 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
584 #define AVERROR_NOMEM (-5) /* not enough memory */
585 #define AVERROR_NOFMT (-6) /* unknown format */
586 #define AVERROR_NOTSUPP (-7) /* operation not supported */
588 int av_find_stream_info(AVFormatContext *ic);
589 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
590 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
591 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
592 int av_read_play(AVFormatContext *s);
593 int av_read_pause(AVFormatContext *s);
594 void av_close_input_file(AVFormatContext *s);
595 AVStream *av_new_stream(AVFormatContext *s, int id);
596 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
597 int pts_num, int pts_den);
599 #define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
600 #define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
601 #define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
603 int av_find_default_stream_index(AVFormatContext *s);
604 int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
605 int av_add_index_entry(AVStream *st,
606 int64_t pos, int64_t timestamp, int distance, int flags);
607 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
609 /* media file output */
610 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
611 int av_write_header(AVFormatContext *s);
612 int av_write_frame(AVFormatContext *s, AVPacket *pkt);
613 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
615 int av_write_trailer(AVFormatContext *s);
617 void dump_format(AVFormatContext *ic,
621 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
622 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
623 int64_t parse_date(const char *datestr, int duration);
625 int64_t av_gettime(void);
627 /* ffm specific for ffserver */
628 #define FFM_PACKET_SIZE 4096
629 offset_t ffm_read_write_index(int fd);
630 void ffm_write_write_index(int fd, offset_t pos);
631 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
633 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
635 int get_frame_filename(char *buf, int buf_size,
636 const char *path, int number);
637 int filename_number_test(const char *filename);
640 int video_grab_init(void);
641 int audio_init(void);
644 int dv1394_init(void);
645 int dc1394_init(void);
647 #ifdef HAVE_AV_CONFIG_H
649 #include "os_support.h"
651 int strstart(const char *str, const char *val, const char **ptr);
652 int stristart(const char *str, const char *val, const char **ptr);
653 void pstrcpy(char *buf, int buf_size, const char *str);
654 char *pstrcat(char *buf, int buf_size, const char *s);
656 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
659 #define dynarray_add(tab, nb_ptr, elem)\
661 typeof(tab) _tab = (tab);\
662 typeof(elem) _elem = (elem);\
663 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
664 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
667 #define dynarray_add(tab, nb_ptr, elem)\
669 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
673 time_t mktimegm(struct tm *tm);
674 struct tm *brktimegm(time_t secs, struct tm *tm);
675 const char *small_strptime(const char *p, const char *fmt,
679 int resolve_host(struct in_addr *sin_addr, const char *hostname);
681 void url_split(char *proto, int proto_size,
682 char *authorization, int authorization_size,
683 char *hostname, int hostname_size,
685 char *path, int path_size,
688 int match_ext(const char *filename, const char *extensions);
690 #endif /* HAVE_AV_CONFIG_H */
696 #endif /* AVFORMAT_H */