8 #define LIBAVFORMAT_VERSION_INT ((50<<16)+(4<<8)+0)
9 #define LIBAVFORMAT_VERSION 50.4.0
10 #define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
12 #define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
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);
45 void av_destruct_packet(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;
55 pkt->stream_index = 0;
56 pkt->destruct= av_destruct_packet_nofree;
59 int av_new_packet(AVPacket *pkt, int size);
60 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
61 int av_dup_packet(AVPacket *pkt);
66 * @param pkt packet to free
68 static inline void av_free_packet(AVPacket *pkt)
70 if (pkt && pkt->destruct) {
75 /*************************************************/
76 /* fractional numbers for exact pts handling */
78 /* the exact value of the fractional number is: 'val + num / den'. num
79 is assumed to be such as 0 <= num < den */
80 typedef struct AVFrac {
81 int64_t val, num, den;
84 /*************************************************/
85 /* input/output formats */
87 struct AVFormatContext;
89 /* this structure contains the data a format has to probe a file */
90 typedef struct AVProbeData {
96 #define AVPROBE_SCORE_MAX 100
98 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; /* video, 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 enum CodecID video_codec_id;
116 enum CodecID audio_codec_id;
117 } AVFormatParameters;
119 #define AVFMT_NOFILE 0x0001 /* no file should be opened */
120 #define AVFMT_NEEDNUMBER 0x0002 /* needs '%d' in filename */
121 #define AVFMT_SHOW_IDS 0x0008 /* show format stream IDs numbers */
122 #define AVFMT_RAWPICTURE 0x0020 /* format wants AVPicture structure for
124 #define AVFMT_GLOBALHEADER 0x0040 /* format wants global header */
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, AVFMT_GLOBALHEADER */
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 *);
169 * seek to a given timestamp relative to the frames in
170 * stream component stream_index
171 * @param stream_index must not be -1
172 * @param flags selects which direction should be preferred if no exact
175 int (*read_seek)(struct AVFormatContext *,
176 int stream_index, int64_t timestamp, int flags);
178 * gets the next timestamp in AV_TIME_BASE units.
180 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
181 int64_t *pos, int64_t pos_limit);
182 /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
184 /* if extensions are defined, then no probe is done. You should
185 usually not use extension format guessing because it is not
187 const char *extensions;
188 /* general purpose read only value that the format can use */
191 /* start/resume playing - only meaningful if using a network based format
193 int (*read_play)(struct AVFormatContext *);
195 /* pause playing - only meaningful if using a network based format
197 int (*read_pause)(struct AVFormatContext *);
200 struct AVInputFormat *next;
203 typedef struct AVIndexEntry {
206 #define AVINDEX_KEYFRAME 0x0001
208 int size:30; //yeah trying to keep the size of this small to reduce memory requirements (its 24 vs 32 byte due to possible 8byte align)
209 int min_distance; /* min distance between this and the previous keyframe, used to avoid unneeded searching */
212 typedef struct AVStream {
213 int index; /* stream index in AVFormatContext */
214 int id; /* format specific stream id */
215 AVCodecContext *codec; /* codec context */
217 * real base frame rate of the stream.
218 * for example if the timebase is 1/90000 and all frames have either
219 * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1
221 AVRational r_frame_rate;
223 /* internal data used in av_find_stream_info() */
224 int64_t codec_info_duration;
225 int codec_info_nb_frames;
226 /* encoding: PTS generation when outputing stream */
230 * this is the fundamental unit of time (in seconds) in terms
231 * of which frame timestamps are represented. for fixed-fps content,
232 * timebase should be 1/framerate and timestamp increments should be
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 */
254 int need_parsing; ///< 1->full parsing needed, 2->only parse headers dont repack
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;
266 int64_t nb_frames; ///< number of frames in this stream if known or 0
269 #define AVFMTCTX_NOHEADER 0x0001 /* signal that no header is present
270 (streams are added dynamically) */
272 #define MAX_STREAMS 20
274 /* format I/O context */
275 typedef struct AVFormatContext {
276 const AVClass *av_class; /* set by av_alloc_format_context */
277 /* can only be iformat or oformat, not both at the same time */
278 struct AVInputFormat *iformat;
279 struct AVOutputFormat *oformat;
283 AVStream *streams[MAX_STREAMS];
284 char filename[1024]; /* input or output filename */
292 int year; /* ID3 year, 0 if none */
293 int track; /* track number, 0 if none */
294 char genre[32]; /* ID3 genre */
296 int ctx_flags; /* format specific flags, see AVFMTCTX_xx */
297 /* private data for pts handling (do not modify directly) */
298 /* This buffer is only needed when packets were already buffered but
299 not decoded, for example to get the codec parameters in mpeg
301 struct AVPacketList *packet_buffer;
303 /* decoding: position of the first frame of the component, in
304 AV_TIME_BASE fractional seconds. NEVER set this value directly:
305 it is deduced from the AVStream values. */
307 /* decoding: duration of the stream, in AV_TIME_BASE fractional
308 seconds. NEVER set this value directly: it is deduced from the
311 /* decoding: total file size. 0 if unknown */
313 /* decoding: total stream bitrate in bit/s, 0 if not
314 available. Never set it directly if the file_size and the
315 duration are known as ffmpeg can compute it automatically. */
318 /* av_read_frame() support */
320 const uint8_t *cur_ptr;
324 /* av_seek_frame() support */
325 int64_t data_offset; /* offset of the first packet */
333 #define AVFMT_NOOUTPUTLOOP -1
334 #define AVFMT_INFINITEOUTPUTLOOP 0
335 /* number of times to loop output in formats that support it */
339 #define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
342 typedef struct AVPacketList {
344 struct AVPacketList *next;
347 extern AVInputFormat *first_iformat;
348 extern AVOutputFormat *first_oformat;
350 /* still image support */
351 struct AVInputImageContext;
352 typedef struct AVInputImageContext AVInputImageContext;
354 typedef struct AVImageInfo {
355 enum PixelFormat pix_fmt; /* requested pixel format */
356 int width; /* requested width */
357 int height; /* requested height */
358 int interleaved; /* image is interleaved (e.g. interleaved GIF) */
359 AVPicture pict; /* returned allocated image */
362 /* AVImageFormat.flags field constants */
363 #define AVIMAGE_INTERLEAVED 0x0001 /* image format support interleaved output */
365 typedef struct AVImageFormat {
367 const char *extensions;
368 /* tell if a given file has a chance of being parsing by this format */
369 int (*img_probe)(AVProbeData *);
370 /* read a whole image. 'alloc_cb' is called when the image size is
371 known so that the caller can allocate the image. If 'allo_cb'
372 returns non zero, then the parsing is aborted. Return '0' if
374 int (*img_read)(ByteIOContext *,
375 int (*alloc_cb)(void *, AVImageInfo *info), void *);
376 /* write the image */
377 int supported_pixel_formats; /* mask of supported formats for output */
378 int (*img_write)(ByteIOContext *, AVImageInfo *);
380 struct AVImageFormat *next;
383 void av_register_image_format(AVImageFormat *img_fmt);
384 AVImageFormat *av_probe_image_format(AVProbeData *pd);
385 AVImageFormat *guess_image_format(const char *filename);
386 enum CodecID av_guess_image2_codec(const char *filename);
387 int av_read_image(ByteIOContext *pb, const char *filename,
389 int (*alloc_cb)(void *, AVImageInfo *info), void *opaque);
390 int av_write_image(ByteIOContext *pb, AVImageFormat *fmt, AVImageInfo *img);
392 extern AVImageFormat *first_image_format;
394 /* XXX: use automatic init with either ELF sections or C file parser */
402 extern AVOutputFormat yuv4mpegpipe_muxer;
405 void av_register_input_format(AVInputFormat *format);
406 void av_register_output_format(AVOutputFormat *format);
407 AVOutputFormat *guess_stream_format(const char *short_name,
408 const char *filename, const char *mime_type);
409 AVOutputFormat *guess_format(const char *short_name,
410 const char *filename, const char *mime_type);
411 enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
412 const char *filename, const char *mime_type, enum CodecType type);
414 void av_hex_dump(FILE *f, uint8_t *buf, int size);
415 void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
417 void av_register_all(void);
419 typedef struct FifoBuffer {
421 uint8_t *rptr, *wptr, *end;
424 int fifo_init(FifoBuffer *f, int size);
425 void fifo_free(FifoBuffer *f);
426 int fifo_size(FifoBuffer *f, uint8_t *rptr);
427 int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr);
428 void fifo_write(FifoBuffer *f, const uint8_t *buf, int size, uint8_t **wptr_ptr);
429 int put_fifo(ByteIOContext *pb, FifoBuffer *f, int buf_size, uint8_t **rptr_ptr);
430 void fifo_realloc(FifoBuffer *f, unsigned int size);
432 /* media file input */
433 AVInputFormat *av_find_input_format(const char *short_name);
434 AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
435 int av_open_input_stream(AVFormatContext **ic_ptr,
436 ByteIOContext *pb, const char *filename,
437 AVInputFormat *fmt, AVFormatParameters *ap);
438 int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
441 AVFormatParameters *ap);
442 /* no av_open for output, so applications will need this: */
443 AVFormatContext *av_alloc_format_context(void);
445 #define AVERROR_UNKNOWN (-1) /* unknown error */
446 #define AVERROR_IO (-2) /* i/o error */
447 #define AVERROR_NUMEXPECTED (-3) /* number syntax expected in filename */
448 #define AVERROR_INVALIDDATA (-4) /* invalid data found */
449 #define AVERROR_NOMEM (-5) /* not enough memory */
450 #define AVERROR_NOFMT (-6) /* unknown format */
451 #define AVERROR_NOTSUPP (-7) /* operation not supported */
453 int av_find_stream_info(AVFormatContext *ic);
454 int av_read_packet(AVFormatContext *s, AVPacket *pkt);
455 int av_read_frame(AVFormatContext *s, AVPacket *pkt);
456 int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
457 int av_read_play(AVFormatContext *s);
458 int av_read_pause(AVFormatContext *s);
459 void av_close_input_file(AVFormatContext *s);
460 AVStream *av_new_stream(AVFormatContext *s, int id);
461 void av_set_pts_info(AVStream *s, int pts_wrap_bits,
462 int pts_num, int pts_den);
464 #define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
465 #define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
466 #define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
468 int av_find_default_stream_index(AVFormatContext *s);
469 int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
470 int av_add_index_entry(AVStream *st,
471 int64_t pos, int64_t timestamp, int size, int distance, int flags);
472 int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
474 /* media file output */
475 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
476 int av_write_header(AVFormatContext *s);
477 int av_write_frame(AVFormatContext *s, AVPacket *pkt);
478 int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
480 int av_write_trailer(AVFormatContext *s);
482 void dump_format(AVFormatContext *ic,
486 int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
487 int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
488 int64_t parse_date(const char *datestr, int duration);
490 int64_t av_gettime(void);
492 /* ffm specific for ffserver */
493 #define FFM_PACKET_SIZE 4096
494 offset_t ffm_read_write_index(int fd);
495 void ffm_write_write_index(int fd, offset_t pos);
496 void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
498 int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
500 int get_frame_filename(char *buf, int buf_size,
501 const char *path, int number);
502 int filename_number_test(const char *filename);
505 int video_grab_init(void);
506 int audio_init(void);
509 int dv1394_init(void);
510 int dc1394_init(void);
512 #ifdef HAVE_AV_CONFIG_H
514 #include "os_support.h"
516 int strstart(const char *str, const char *val, const char **ptr);
517 int stristart(const char *str, const char *val, const char **ptr);
518 void pstrcpy(char *buf, int buf_size, const char *str);
519 char *pstrcat(char *buf, int buf_size, const char *s);
521 void __dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
524 #define dynarray_add(tab, nb_ptr, elem)\
526 typeof(tab) _tab = (tab);\
527 typeof(elem) _elem = (elem);\
528 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
529 __dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
532 #define dynarray_add(tab, nb_ptr, elem)\
534 __dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
538 time_t mktimegm(struct tm *tm);
539 struct tm *brktimegm(time_t secs, struct tm *tm);
540 const char *small_strptime(const char *p, const char *fmt,
544 int resolve_host(struct in_addr *sin_addr, const char *hostname);
546 void url_split(char *proto, int proto_size,
547 char *authorization, int authorization_size,
548 char *hostname, int hostname_size,
550 char *path, int path_size,
553 int match_ext(const char *filename, const char *extensions);
555 #endif /* HAVE_AV_CONFIG_H */
561 #endif /* AVFORMAT_H */