8 #define LIBAVFORMAT_BUILD 4611
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 /* initialize optional fields of a packet */
46 static inline void av_init_packet(AVPacket *pkt)
48 pkt->pts = AV_NOPTS_VALUE;
49 pkt->dts = AV_NOPTS_VALUE;
52 pkt->stream_index = 0;
55 int av_new_packet(AVPacket *pkt, int size);
56 int av_dup_packet(AVPacket *pkt);
61 * @param pkt packet to free
63 static inline void av_free_packet(AVPacket *pkt)
65 if (pkt && pkt->destruct) {
70 /*************************************************/
71 /* fractional numbers for exact pts handling */
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;
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);
83 /*************************************************/
84 /* input/output formats */
86 struct AVFormatContext;
88 /* this structure contains the data a format has to probe a file */
89 typedef struct AVProbeData {
95 #define AVPROBE_SCORE_MAX 100
97 typedef struct AVFormatParameters {
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;
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
123 typedef struct AVOutputFormat {
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 */
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 *,
136 const uint8_t *buf, int size, int64_t pts);
137 int (*write_trailer)(struct AVFormatContext *);
138 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
140 /* currently only used to set pixel format if not YUV420P */
141 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
143 struct AVOutputFormat *next;
146 typedef struct AVInputFormat {
148 const char *long_name;
149 /* size of private data so that it can be allocated in the wrapper */
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 */
172 /* if extensions are defined, then no probe is done. You should
173 usually not use extension format guessing because it is not
175 const char *extensions;
176 /* general purpose read only value that the format can use */
179 /* start/resume playing - only meaningful if using a network based format
181 int (*read_play)(struct AVFormatContext *);
183 /* pause playing - only meaningful if using a network based format
185 int (*read_pause)(struct AVFormatContext *);
188 struct AVInputFormat *next;
191 typedef struct AVIndexEntry {
194 #define AVINDEX_KEYFRAME 0x0001
195 /* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
197 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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 */
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 */
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 */
217 /* decoding: position of the first frame of the component, in
218 AV_TIME_BASE fractional seconds. */
220 /* decoding: duration of the stream, in AV_TIME_BASE fractional
224 /* av_read_frame() support */
226 struct AVCodecParserContext *parser;
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;
237 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
238 (streams are added dynamically) */
240 #define MAX_STREAMS 20
242 /* format I/O context */
243 typedef struct AVFormatContext {
244 AVClass *av_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;
251 AVStream *streams[MAX_STREAMS];
252 char filename[1024]; /* input or output filename */
259 int year; /* ID3 year, 0 if none */
260 int track; /* track number, 0 if none */
261 char genre[32]; /* ID3 genre */
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
270 struct AVPacketList *packet_buffer;
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. */
276 /* decoding: duration of the stream, in AV_TIME_BASE fractional
277 seconds. NEVER set this value directly: it is deduced from the
280 /* decoding: total file size. 0 if unknown */
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. */
287 /* av_read_frame() support */
289 const uint8_t *cur_ptr;
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;
301 /* av_seek_frame() support */
302 int64_t data_offset; /* offset of the first packet */
306 typedef struct AVPacketList {
308 struct AVPacketList *next;
311 extern AVInputFormat *first_iformat;
312 extern AVOutputFormat *first_oformat;
314 /* still image support */
315 struct AVInputImageContext;
316 typedef struct AVInputImageContext AVInputImageContext;
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 */
326 /* AVImageFormat.flags field constants */
327 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
329 typedef struct AVImageFormat {
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
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 *);
344 struct AVImageFormat *next;
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,
352 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
353 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
355 extern AVImageFormat *first_image_format;
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;
365 extern AVImageFormat png_image_format;
367 extern AVImageFormat jpeg_image_format;
368 extern AVImageFormat gif_image_format;
370 /* XXX: use automatic init with either ELF sections or C file parser */
374 extern AVInputFormat mpegps_demux;
375 int mpegps_init(void);
378 extern AVInputFormat mpegts_demux;
379 int mpegts_init(void);
394 int avienc_init(void);
397 int avidec_init(void);
406 int movenc_init(void);
409 int flvenc_init(void);
412 int flvdec_init(void);
430 int pcm_read_seek(AVFormatContext *s,
431 int stream_index, int64_t timestamp);
438 int yuv4mpeg_init(void);
450 extern AVInputFormat redir_demux;
451 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
454 int fourxm_init(void);
463 int ipmovie_init(void);
472 int westwood_init(void);
478 int idcin_init(void);
487 int matroska_init(void);
494 extern AVOutputFormat yuv4mpegpipe_oformat;
497 void av_register_input_format(AVInputFormat *format);
498 void av_register_output_format(AVOutputFormat *format);
499 AVOutputFormat *guess_stream_format(const char *short_name,
500 const char *filename, const char *mime_type);
501 AVOutputFormat *guess_format(const char *short_name,
502 const char *filename, const char *mime_type);
504 void av_hex_dump(FILE *f, uint8_t *buf, int size);
505 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
507 void av_register_all(void);
509 typedef struct FifoBuffer {
511 uint8_t *rptr, *wptr, *end;
514 int fifo_init(FifoBuffer *f, int size);
515 void fifo_free(FifoBuffer *f);
516 int fifo_size(FifoBuffer *f, uint8_t *rptr);
517 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
518 void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
520 /* media file input */
521 AVInputFormat *av_find_input_format(const char *short_name);
522 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
523 int av_open_input_stream(AVFormatContext **ic_ptr,
524 ByteIOContext *pb, const char *filename,
525 AVInputFormat *fmt, AVFormatParameters *ap);
526 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
529 AVFormatParameters *ap);
530 /* no av_open for output, so applications will need this: */
531 AVFormatContext *av_alloc_format_context(void);
533 #define AVERROR_UNKNOWN (-1) /* unknown error */
534 #define AVERROR_IO (-2) /* i/o error */
535 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
536 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
537 #define AVERROR_NOMEM (-5) /* not enough memory */
538 #define AVERROR_NOFMT (-6) /* unknown format */
539 #define AVERROR_NOTSUPP (-7) /* operation not supported */
541 int av_find_stream_info(AVFormatContext *ic);
542 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
543 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
544 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp);
545 int av_read_play(AVFormatContext *s);
546 int av_read_pause(AVFormatContext *s);
547 void av_close_input_file(AVFormatContext *s);
548 AVStream *av_new_stream(AVFormatContext *s, int id);
549 void av_set_pts_info(AVFormatContext *s, int pts_wrap_bits,
550 int pts_num, int pts_den);
552 int av_find_default_stream_index(AVFormatContext *s);
553 int av_index_search_timestamp(AVStream *st, int timestamp);
554 int av_add_index_entry(AVStream *st,
555 int64_t pos, int64_t timestamp, int distance, int flags);
557 /* media file output */
558 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
559 int av_write_header(AVFormatContext *s);
560 int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
562 int av_write_trailer(AVFormatContext *s);
564 void dump_format(AVFormatContext *ic,
568 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
569 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
570 int64_t parse_date(const char *datestr, int duration);
572 int64_t av_gettime(void);
574 /* ffm specific for ffserver */
575 #define FFM_PACKET_SIZE 4096
576 offset_t ffm_read_write_index(int fd);
577 void ffm_write_write_index(int fd, offset_t pos);
578 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
580 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
582 int get_frame_filename(char *buf, int buf_size,
583 const char *path, int number);
584 int filename_number_test(const char *filename);
587 int video_grab_init(void);
588 int audio_init(void);
591 int dv1394_init(void);
593 #ifdef HAVE_AV_CONFIG_H
595 #include "os_support.h"
597 int strstart(const char *str, const char *val, const char **ptr);
598 int stristart(const char *str, const char *val, const char **ptr);
599 void pstrcpy(char *buf, int buf_size, const char *str);
600 char *pstrcat(char *buf, int buf_size, const char *s);
602 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
605 #define dynarray_add(tab, nb_ptr, elem)\
607 typeof(tab) _tab = (tab);\
608 typeof(elem) _elem = (elem);\
609 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
610 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
613 #define dynarray_add(tab, nb_ptr, elem)\
615 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
619 time_t mktimegm(struct tm *tm);
620 const char *small_strptime(const char *p, const char *fmt,
624 int resolve_host(struct in_addr *sin_addr, const char *hostname);
626 void url_split(char *proto, int proto_size,
627 char *hostname, int hostname_size,
629 char *path, int path_size,
632 int match_ext(const char *filename, const char *extensions);
634 #endif /* HAVE_AV_CONFIG_H */
640 #endif /* AVFORMAT_H */