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 #define AV_NOPTS_VALUE MININT64
31 #define AV_TIME_BASE 1000000
33 typedef struct AVPacket {
34 int64_t pts; /* presentation time stamp in AV_TIME_BASE units (or
35 pts_den units in muxers or demuxers) */
36 int64_t dts; /* decompression time stamp in AV_TIME_BASE units (or
37 pts_den units in muxers or demuxers) */
42 int duration; /* presentation duration (0 if not available) */
43 void (*destruct)(struct AVPacket *);
46 #define PKT_FLAG_KEY 0x0001
48 /* initialize optional fields of a packet */
49 static inline void av_init_packet(AVPacket *pkt)
51 pkt->pts = AV_NOPTS_VALUE;
52 pkt->dts = AV_NOPTS_VALUE;
55 pkt->stream_index = 0;
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 *,
139 const uint8_t *buf, int size, int64_t pts);
140 int (*write_trailer)(struct AVFormatContext *);
141 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
143 /* currently only used to set pixel format if not YUV420P */
144 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
146 struct AVOutputFormat *next;
149 typedef struct AVInputFormat {
151 const char *long_name;
152 /* size of private data so that it can be allocated in the wrapper */
154 /* tell if a given file has a chance of being parsing by this format */
155 int (*read_probe)(AVProbeData *);
156 /* read the format header and initialize the AVFormatContext
157 structure. Return 0 if OK. 'ap' if non NULL contains
158 additionnal paramters. Only used in raw format right
159 now. 'av_new_stream' should be called to create new streams. */
160 int (*read_header)(struct AVFormatContext *,
161 AVFormatParameters *ap);
162 /* read one packet and put it in 'pkt'. pts and flags are also
163 set. 'av_new_stream' can be called only if the flag
164 AVFMTCTX_NOHEADER is used. */
165 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
166 /* close the stream. The AVFormatContext and AVStreams are not
167 freed by this function */
168 int (*read_close)(struct AVFormatContext *);
169 /* seek at or before a given timestamp (given in AV_TIME_BASE
170 units) relative to the frames in stream component stream_index */
171 int (*read_seek)(struct AVFormatContext *,
172 int stream_index, int64_t timestamp);
173 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
175 /* if extensions are defined, then no probe is done. You should
176 usually not use extension format guessing because it is not
178 const char *extensions;
179 /* general purpose read only value that the format can use */
182 /* start/resume playing - only meaningful if using a network based format
184 int (*read_play)(struct AVFormatContext *);
186 /* pause playing - only meaningful if using a network based format
188 int (*read_pause)(struct AVFormatContext *);
191 struct AVInputFormat *next;
194 typedef struct AVIndexEntry {
197 #define AVINDEX_KEYFRAME 0x0001
198 /* the following 2 flags indicate that the next/prev keyframe is known, and scaning for it isnt needed */
200 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
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 */
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 */
215 /* ffmpeg.c private use */
216 int stream_copy; /* if TRUE, just copy stream */
217 /* quality, as it has been removed from AVCodecContext and put in AVVideoFrame
218 * MN:dunno if thats the right place, for it */
220 /* decoding: position of the first frame of the component, in
221 AV_TIME_BASE fractional seconds. */
223 /* decoding: duration of the stream, in AV_TIME_BASE fractional
227 /* av_read_frame() support */
229 struct AVCodecParserContext *parser;
232 int last_IP_duration;
233 /* av_seek_frame() support */
234 AVIndexEntry *index_entries; /* only used if the format does not
235 support seeking natively */
236 int nb_index_entries;
237 int index_entries_allocated_size;
240 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
241 (streams are added dynamically) */
243 #define MAX_STREAMS 20
245 /* format I/O context */
246 typedef struct AVFormatContext {
247 /* can only be iformat or oformat, not both at the same time */
248 struct AVInputFormat *iformat;
249 struct AVOutputFormat *oformat;
253 AVStream *streams[MAX_STREAMS];
254 char filename[1024]; /* input or output filename */
261 int year; /* ID3 year, 0 if none */
262 int track; /* track number, 0 if none */
263 char genre[32]; /* ID3 genre */
265 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
266 /* private data for pts handling (do not modify directly) */
267 int pts_wrap_bits; /* number of bits in pts (used for wrapping control) */
268 int pts_num, pts_den; /* value to convert to seconds */
269 /* This buffer is only needed when packets were already buffered but
270 not decoded, for example to get the codec parameters in mpeg
272 struct AVPacketList *packet_buffer;
274 /* decoding: position of the first frame of the component, in
275 AV_TIME_BASE fractional seconds. NEVER set this value directly:
276 it is deduced from the AVStream values. */
278 /* decoding: duration of the stream, in AV_TIME_BASE fractional
279 seconds. NEVER set this value directly: it is deduced from the
282 /* decoding: total file size. 0 if unknown */
284 /* decoding: total stream bitrate in bit/s, 0 if not
285 available. Never set it directly if the file_size and the
286 duration are known as ffmpeg can compute it automatically. */
289 /* av_read_frame() support */
291 const uint8_t *cur_ptr;
295 /* the following are used for pts/dts unit conversion */
296 int64_t last_pkt_stream_pts;
297 int64_t last_pkt_stream_dts;
298 int64_t last_pkt_pts;
299 int64_t last_pkt_dts;
300 int last_pkt_pts_frac;
301 int last_pkt_dts_frac;
303 /* av_seek_frame() support */
304 int64_t data_offset; /* offset of the first packet */
308 typedef struct AVPacketList {
310 struct AVPacketList *next;
313 extern AVInputFormat *first_iformat;
314 extern AVOutputFormat *first_oformat;
316 /* still image support */
317 struct AVInputImageContext;
318 typedef struct AVInputImageContext AVInputImageContext;
320 typedef struct AVImageInfo {
321 enum PixelFormat pix_fmt; /* requested pixel format */
322 int width; /* requested width */
323 int height; /* requested height */
324 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
325 AVPicture pict; /* returned allocated image */
328 /* AVImageFormat.flags field constants */
329 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
331 typedef struct AVImageFormat {
333 const char *extensions;
334 /* tell if a given file has a chance of being parsing by this format */
335 int (*img_probe)(AVProbeData *);
336 /* read a whole image. 'alloc_cb' is called when the image size is
337 known so that the caller can allocate the image. If 'allo_cb'
338 returns non zero, then the parsing is aborted. Return '0' if
340 int (*img_read)(ByteIOContext *,
341 int (*alloc_cb)(void *, AVImageInfo *info), void *);
342 /* write the image */
343 int supported_pixel_formats; /* mask of supported formats for output */
344 int (*img_write)(ByteIOContext *, AVImageInfo *);
346 struct AVImageFormat *next;
349 void av_register_image_format(AVImageFormat *img_fmt);
350 AVImageFormat *av_probe_image_format(AVProbeData *pd);
351 AVImageFormat *guess_image_format(const char *filename);
352 int av_read_image(ByteIOContext *pb, const char *filename,
354 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
355 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
357 extern AVImageFormat *first_image_format;
359 extern AVImageFormat pnm_image_format;
360 extern AVImageFormat pbm_image_format;
361 extern AVImageFormat pgm_image_format;
362 extern AVImageFormat ppm_image_format;
363 extern AVImageFormat pam_image_format;
364 extern AVImageFormat pgmyuv_image_format;
365 extern AVImageFormat yuv_image_format;
367 extern AVImageFormat png_image_format;
369 extern AVImageFormat jpeg_image_format;
370 extern AVImageFormat gif_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);
396 int avienc_init(void);
399 int avidec_init(void);
408 int movenc_init(void);
411 int flvenc_init(void);
414 int flvdec_init(void);
432 int pcm_read_seek(AVFormatContext *s,
433 int stream_index, int64_t timestamp);
440 int yuv4mpeg_init(void);
452 extern AVInputFormat redir_demux;
453 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f);
456 int fourxm_init(void);
465 int ipmovie_init(void);
474 int westwood_init(void);
480 int idcin_init(void);
493 extern AVOutputFormat yuv4mpegpipe_oformat;
496 void av_register_input_format(AVInputFormat *format);
497 void av_register_output_format(AVOutputFormat *format);
498 AVOutputFormat *guess_stream_format(const char *short_name,
499 const char *filename, const char *mime_type);
500 AVOutputFormat *guess_format(const char *short_name,
501 const char *filename, const char *mime_type);
503 void av_hex_dump(FILE *f, uint8_t *buf, int size);
504 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
506 void av_register_all(void);
508 typedef struct FifoBuffer {
510 uint8_t *rptr, *wptr, *end;
513 int fifo_init(FifoBuffer *f, int size);
514 void fifo_free(FifoBuffer *f);
515 int fifo_size(FifoBuffer *f, uint8_t *rptr);
516 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
517 void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr);
519 /* media file input */
520 AVInputFormat *av_find_input_format(const char *short_name);
521 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
522 int av_open_input_stream(AVFormatContext **ic_ptr,
523 ByteIOContext *pb, const char *filename,
524 AVInputFormat *fmt, AVFormatParameters *ap);
525 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
528 AVFormatParameters *ap);
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 */
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);
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);
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,
559 int av_write_trailer(AVFormatContext *s);
561 void dump_format(AVFormatContext *ic,
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);
569 int64_t av_gettime(void);
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);
577 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
579 int get_frame_filename(char *buf, int buf_size,
580 const char *path, int number);
581 int filename_number_test(const char *filename);
584 int video_grab_init(void);
585 int audio_init(void);
588 int dv1394_init(void);
590 #ifdef HAVE_AV_CONFIG_H
592 #include "os_support.h"
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);
599 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
602 #define dynarray_add(tab, nb_ptr, elem)\
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);\
610 #define dynarray_add(tab, nb_ptr, elem)\
612 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
616 time_t mktimegm(struct tm *tm);
617 const char *small_strptime(const char *p, const char *fmt,
621 int resolve_host(struct in_addr *sin_addr, const char *hostname);
623 void url_split(char *proto, int proto_size,
624 char *hostname, int hostname_size,
626 char *path, int path_size,
629 int match_ext(const char *filename, const char *extensions);
631 #endif /* HAVE_AV_CONFIG_H */
637 #endif /* AVFORMAT_H */