FFmpeg
internal.h
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1 /*
2  * copyright (c) 2001 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFORMAT_INTERNAL_H
22 #define AVFORMAT_INTERNAL_H
23 
24 #include <stdint.h>
25 
26 #include "libavutil/bprint.h"
27 #include "avformat.h"
28 #include "os_support.h"
29 
30 #define MAX_URL_SIZE 4096
31 
32 /** size of probe buffer, for guessing file type from file contents */
33 #define PROBE_BUF_MIN 2048
34 #define PROBE_BUF_MAX (1 << 20)
35 
36 #ifdef DEBUG
37 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
38 #else
39 # define hex_dump_debug(class, buf, size) do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
40 #endif
41 
42 typedef struct AVCodecTag {
43  enum AVCodecID id;
44  unsigned int tag;
45 } AVCodecTag;
46 
47 typedef struct CodecMime{
48  char str[32];
49  enum AVCodecID id;
50 } CodecMime;
51 
52 /*************************************************/
53 /* fractional numbers for exact pts handling */
54 
55 /**
56  * The exact value of the fractional number is: 'val + num / den'.
57  * num is assumed to be 0 <= num < den.
58  */
59 typedef struct FFFrac {
60  int64_t val, num, den;
61 } FFFrac;
62 
63 
65  /**
66  * Number of streams relevant for interleaving.
67  * Muxing only.
68  */
70 
71  /**
72  * This buffer is only needed when packets were already buffered but
73  * not decoded, for example to get the codec parameters in MPEG
74  * streams.
75  */
78 
79  /* av_seek_frame() support */
80  int64_t data_offset; /**< offset of the first packet */
81 
82  /**
83  * Raw packets from the demuxer, prior to parsing and decoding.
84  * This buffer is used for buffering packets until the codec can
85  * be identified, as parsing cannot be done without knowing the
86  * codec.
87  */
90  /**
91  * Packets split by the parser get queued here.
92  */
95  /**
96  * The generic code uses this as a temporary packet
97  * to parse packets; it may also be used for other means
98  * for short periods that are guaranteed not to overlap
99  * with calls to av_read_frame() (or ff_read_packet())
100  * or with each other.
101  * It may be used by demuxers as a replacement for
102  * stack packets (unless they call one of the aforementioned
103  * functions with their own AVFormatContext).
104  * Every user has to ensure that this packet is blank
105  * after using it.
106  */
108 
109  /**
110  * Used to hold temporary packets.
111  */
113  /**
114  * Remaining size available for raw_packet_buffer, in bytes.
115  */
116 #define RAW_PACKET_BUFFER_SIZE 2500000
118 
119  /**
120  * Offset to remap timestamps to be non-negative.
121  * Expressed in timebase units.
122  * @see AVStream.mux_ts_offset
123  */
124  int64_t offset;
125 
126  /**
127  * Timebase for the timestamp offset.
128  */
130 
131 #if FF_API_COMPUTE_PKT_FIELDS2
132  int missing_ts_warning;
133 #endif
134 
136 
138 
139  /**
140  * Timestamp of the end of the shortest stream.
141  */
142  int64_t shortest_end;
143 
144  /**
145  * Whether or not avformat_init_output has already been called
146  */
148 
149  /**
150  * Whether or not avformat_init_output fully initialized streams
151  */
153 
154  /**
155  * ID3v2 tag useful for MP3 demuxing
156  */
158 
159  /*
160  * Prefer the codec framerate for avg_frame_rate computation.
161  */
163 
164  /**
165  * Set if chapter ids are strictly monotonic.
166  */
168 };
169 
171  /**
172  * Set to 1 if the codec allows reordering, so pts can be different
173  * from dts.
174  */
175  int reorder;
176 
177  /**
178  * bitstream filter to run on stream
179  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
180  * - decoding: unused
181  */
183 
184  /**
185  * Whether or not check_bitstream should still be run on each packet
186  */
188 
189  /**
190  * The codec context used by avformat_find_stream_info, the parser, etc.
191  */
193  /**
194  * 1 if avctx has been initialized with the values from the codec parameters
195  */
197 
199 
200  /* the context for extracting extradata in find_stream_info()
201  * inited=1/bsf=NULL signals that extracting is not possible (codec not
202  * supported) */
203  struct {
205  int inited;
207 
208  /**
209  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
210  */
212 
214 
216 
217 #define MAX_STD_TIMEBASES (30*12+30+3+6)
218  /**
219  * Stream information used internally by avformat_find_stream_info()
220  */
221  struct {
222  int64_t last_dts;
223  int64_t duration_gcd;
230 
231  /**
232  * 0 -> decoder has not been searched for yet.
233  * >0 -> decoder found
234  * <0 -> decoder with codec_id == -found_decoder has not been found
235  */
237 
238  int64_t last_duration;
239 
240  /**
241  * Those are used for average framerate estimation.
242  */
243  int64_t fps_first_dts;
245  int64_t fps_last_dts;
247 
248  } *info;
249 
250  AVIndexEntry *index_entries; /**< Only used if the format does not
251  support seeking natively. */
254 
257 
258  /**
259  * stream probing state
260  * -1 -> probing finished
261  * 0 -> no probing requested
262  * rest -> perform probing with request_probe being the minimum score to accept.
263  */
265  /**
266  * Indicates that everything up to the next keyframe
267  * should be discarded.
268  */
270 
271  /**
272  * Number of samples to skip at the start of the frame decoded from the next packet.
273  */
275 
276  /**
277  * If not 0, the number of samples that should be skipped from the start of
278  * the stream (the samples are removed from packets with pts==0, which also
279  * assumes negative timestamps do not happen).
280  * Intended for use with formats such as mp3 with ad-hoc gapless audio
281  * support.
282  */
284 
285  /**
286  * If not 0, the first audio sample that should be discarded from the stream.
287  * This is broken by design (needs global sample count), but can't be
288  * avoided for broken by design formats such as mp3 with ad-hoc gapless
289  * audio support.
290  */
292 
293  /**
294  * The sample after last sample that is intended to be discarded after
295  * first_discard_sample. Works on frame boundaries only. Used to prevent
296  * early EOF if the gapless info is broken (considered concatenated mp3s).
297  */
299 
300  /**
301  * Number of internally decoded frames, used internally in libavformat, do not access
302  * its lifetime differs from info which is why it is not in that structure.
303  */
305 
306  /**
307  * Timestamp offset added to timestamps before muxing
308  */
309  int64_t mux_ts_offset;
310 
311  /**
312  * Internal data to check for wrapping of the time stamp
313  */
315 
316  /**
317  * Options for behavior, when a wrap is detected.
318  *
319  * Defined by AV_PTS_WRAP_ values.
320  *
321  * If correction is enabled, there are two possibilities:
322  * If the first time stamp is near the wrap point, the wrap offset
323  * will be subtracted, which will create negative time stamps.
324  * Otherwise the offset will be added.
325  */
327 
328  /**
329  * Internal data to prevent doing update_initial_durations() twice
330  */
332 
333 #define MAX_REORDER_DELAY 16
334 
335  /**
336  * Internal data to generate dts from pts
337  */
340 
342 
343  /**
344  * Internal data to analyze DTS and detect faulty mpeg streams
345  */
347  uint8_t dts_ordered;
348  uint8_t dts_misordered;
349 
350  /**
351  * Internal data to inject global side data
352  */
354 
355  /**
356  * display aspect ratio (0 if unknown)
357  * - encoding: unused
358  * - decoding: Set by libavformat to calculate sample_aspect_ratio internally
359  */
361 
363 
364  /**
365  * last packet in packet_buffer for this stream when muxing.
366  */
368 
369  int64_t last_IP_pts;
371 
372  /**
373  * Number of packets to buffer for codec probing
374  */
376 
377  /* av_read_frame() support */
380 
381  /**
382  * Number of frames that have been demuxed during avformat_find_stream_info()
383  */
385 
386  /**
387  * Stream Identifier
388  * This is the MPEG-TS stream identifier +1
389  * 0 means unknown
390  */
392 };
393 
395 
396 #ifdef __GNUC__
397 #define dynarray_add(tab, nb_ptr, elem)\
398 do {\
399  __typeof__(tab) _tab = (tab);\
400  __typeof__(elem) _elem = (elem);\
401  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
402  av_dynarray_add(_tab, nb_ptr, _elem);\
403 } while(0)
404 #else
405 #define dynarray_add(tab, nb_ptr, elem)\
406 do {\
407  av_dynarray_add((tab), nb_ptr, (elem));\
408 } while(0)
409 #endif
410 
411 /**
412  * Automatically create sub-directories
413  *
414  * @param path will create sub-directories by path
415  * @return 0, or < 0 on error
416  */
417 int ff_mkdir_p(const char *path);
418 
419 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
420 
421 /**
422  * Parse a string of hexadecimal strings. Any space between the hexadecimal
423  * digits is ignored.
424  *
425  * @param data if non-null, the parsed data is written to this pointer
426  * @param p the string to parse
427  * @return the number of bytes written (or to be written, if data is null)
428  */
429 int ff_hex_to_data(uint8_t *data, const char *p);
430 
431 /**
432  * Add packet to an AVFormatContext's packet_buffer list, determining its
433  * interleaved position using compare() function argument.
434  * @return 0 on success, < 0 on error. pkt will always be blank on return.
435  */
437  int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *));
438 
440 
441 #define NTP_OFFSET 2208988800ULL
442 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
443 
444 /** Get the current time since NTP epoch in microseconds. */
445 uint64_t ff_ntp_time(void);
446 
447 /**
448  * Get the NTP time stamp formatted as per the RFC-5905.
449  *
450  * @param ntp_time NTP time in micro seconds (since NTP epoch)
451  * @return the formatted NTP time stamp
452  */
453 uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us);
454 
455 /**
456  * Parse the NTP time in micro seconds (since NTP epoch).
457  *
458  * @param ntp_ts NTP time stamp formatted as per the RFC-5905.
459  * @return the time in micro seconds (since NTP epoch)
460  */
461 uint64_t ff_parse_ntp_time(uint64_t ntp_ts);
462 
463 /**
464  * Append the media-specific SDP fragment for the media stream c
465  * to the buffer buff.
466  *
467  * Note, the buffer needs to be initialized, since it is appended to
468  * existing content.
469  *
470  * @param buff the buffer to append the SDP fragment to
471  * @param size the size of the buff buffer
472  * @param st the AVStream of the media to describe
473  * @param idx the global stream index
474  * @param dest_addr the destination address of the media stream, may be NULL
475  * @param dest_type the destination address type, may be NULL
476  * @param port the destination port of the media stream, 0 if unknown
477  * @param ttl the time to live of the stream, 0 if not multicast
478  * @param fmt the AVFormatContext, which might contain options modifying
479  * the generated SDP
480  */
481 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
482  const char *dest_addr, const char *dest_type,
483  int port, int ttl, AVFormatContext *fmt);
484 
485 /**
486  * Write a packet to another muxer than the one the user originally
487  * intended. Useful when chaining muxers, where one muxer internally
488  * writes a received packet to another muxer.
489  *
490  * @param dst the muxer to write the packet to
491  * @param dst_stream the stream index within dst to write the packet to
492  * @param pkt the packet to be written
493  * @param src the muxer the packet originally was intended for
494  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
495  * @return the value av_write_frame returned
496  */
497 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
499 
500 /**
501  * Read a whole line of text from AVIOContext. Stop reading after reaching
502  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
503  * and may be truncated if the buffer is too small.
504  *
505  * @param s the read-only AVIOContext
506  * @param buf buffer to store the read line
507  * @param maxlen size of the buffer
508  * @return the length of the string written in the buffer, not including the
509  * final \\0
510  */
511 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
512 
513 /**
514  * Same as ff_get_line but strip the white-space characters in the text tail
515  *
516  * @param s the read-only AVIOContext
517  * @param buf buffer to store the read line
518  * @param maxlen size of the buffer
519  * @return the length of the string written in the buffer
520  */
521 int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen);
522 
523 /**
524  * Read a whole line of text from AVIOContext to an AVBPrint buffer. Stop
525  * reading after reaching a \\r, a \\n, a \\r\\n, a \\0 or EOF. The line
526  * ending characters are NOT included in the buffer, but they are skipped on
527  * the input.
528  *
529  * @param s the read-only AVIOContext
530  * @param bp the AVBPrint buffer
531  * @return the length of the read line, not including the line endings,
532  * negative on error.
533  */
534 int64_t ff_read_line_to_bprint(AVIOContext *s, AVBPrint *bp);
535 
536 /**
537  * Read a whole line of text from AVIOContext to an AVBPrint buffer overwriting
538  * its contents. Stop reading after reaching a \\r, a \\n, a \\r\\n, a \\0 or
539  * EOF. The line ending characters are NOT included in the buffer, but they
540  * are skipped on the input.
541  *
542  * @param s the read-only AVIOContext
543  * @param bp the AVBPrint buffer
544  * @return the length of the read line not including the line endings,
545  * negative on error, or if the buffer becomes truncated.
546  */
547 int64_t ff_read_line_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp);
548 
549 #define SPACE_CHARS " \t\r\n"
550 
551 /**
552  * Callback function type for ff_parse_key_value.
553  *
554  * @param key a pointer to the key
555  * @param key_len the number of bytes that belong to the key, including the '='
556  * char
557  * @param dest return the destination pointer for the value in *dest, may
558  * be null to ignore the value
559  * @param dest_len the length of the *dest buffer
560  */
561 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
562  int key_len, char **dest, int *dest_len);
563 /**
564  * Parse a string with comma-separated key=value pairs. The value strings
565  * may be quoted and may contain escaped characters within quoted strings.
566  *
567  * @param str the string to parse
568  * @param callback_get_buf function that returns where to store the
569  * unescaped value string.
570  * @param context the opaque context pointer to pass to callback_get_buf
571  */
572 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
573  void *context);
574 
575 /**
576  * Find stream index based on format-specific stream ID
577  * @return stream index, or < 0 on error
578  */
580 
581 /**
582  * Internal version of av_index_search_timestamp
583  */
584 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
585  int64_t wanted_timestamp, int flags);
586 
587 /**
588  * Internal version of av_add_index_entry
589  */
590 int ff_add_index_entry(AVIndexEntry **index_entries,
591  int *nb_index_entries,
592  unsigned int *index_entries_allocated_size,
593  int64_t pos, int64_t timestamp, int size, int distance, int flags);
594 
595 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
596 
597 /**
598  * Add a new chapter.
599  *
600  * @param s media file handle
601  * @param id unique ID for this chapter
602  * @param start chapter start time in time_base units
603  * @param end chapter end time in time_base units
604  * @param title chapter title
605  *
606  * @return AVChapter or NULL on error
607  */
608 AVChapter *avpriv_new_chapter(AVFormatContext *s, int64_t id, AVRational time_base,
609  int64_t start, int64_t end, const char *title);
610 
611 /**
612  * Ensure the index uses less memory than the maximum specified in
613  * AVFormatContext.max_index_size by discarding entries if it grows
614  * too large.
615  */
616 void ff_reduce_index(AVFormatContext *s, int stream_index);
617 
618 enum AVCodecID ff_guess_image2_codec(const char *filename);
619 
620 /**
621  * Perform a binary search using av_index_search_timestamp() and
622  * AVInputFormat.read_timestamp().
623  *
624  * @param target_ts target timestamp in the time base of the given stream
625  * @param stream_index stream number
626  */
627 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
628  int64_t target_ts, int flags);
629 
630 /**
631  * Update cur_dts of all streams based on the given timestamp and AVStream.
632  *
633  * Stream ref_st unchanged, others set cur_dts in their native time base.
634  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
635  * @param timestamp new dts expressed in time_base of param ref_st
636  * @param ref_st reference stream giving time_base of param timestamp
637  */
638 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
639 
640 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
641  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
642 
643 /**
644  * Perform a binary search using read_timestamp().
645  *
646  * @param target_ts target timestamp in the time base of the given stream
647  * @param stream_index stream number
648  */
649 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
650  int64_t target_ts, int64_t pos_min,
651  int64_t pos_max, int64_t pos_limit,
652  int64_t ts_min, int64_t ts_max,
653  int flags, int64_t *ts_ret,
654  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
655 
656 /**
657  * Set the time base and wrapping info for a given stream. This will be used
658  * to interpret the stream's timestamps. If the new time base is invalid
659  * (numerator or denominator are non-positive), it leaves the stream
660  * unchanged.
661  *
662  * @param s stream
663  * @param pts_wrap_bits number of bits effectively used by the pts
664  * (used for wrap control)
665  * @param pts_num time base numerator
666  * @param pts_den time base denominator
667  */
668 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
669  unsigned int pts_num, unsigned int pts_den);
670 
671 /**
672  * Add side data to a packet for changing parameters to the given values.
673  * Parameters set to 0 aren't included in the change.
674  */
676  uint64_t channel_layout, int32_t sample_rate,
678 
679 /**
680  * Set the timebase for each stream from the corresponding codec timebase and
681  * print it.
682  */
684 
685 /**
686  * Read a transport packet from a media file.
687  *
688  * @param s media file handle
689  * @param pkt is filled
690  * @return 0 if OK, AVERROR_xxx on error
691  */
693 
694 /**
695  * Add an attached pic to an AVStream.
696  *
697  * @param st if set, the stream to add the attached pic to;
698  * if unset, a new stream will be added to s.
699  * @param pb AVIOContext to read data from if buf is unset.
700  * @param buf if set, it contains the data and size information to be used
701  * for the attached pic; if unset, data is read from pb.
702  * @param size the size of the data to read if buf is unset.
703  *
704  * @return 0 on success, < 0 on error. On error, this function removes
705  * the stream it has added (if any).
706  */
708  AVBufferRef **buf, int size);
709 
710 /**
711  * Interleave an AVPacket per dts so it can be muxed.
712  *
713  * @param s an AVFormatContext for output. pkt resp. out will be added to
714  * resp. taken from its packet buffer.
715  * @param out the interleaved packet will be output here
716  * @param pkt the input packet; will be blank on return if not NULL
717  * @param flush 1 if no further packets are available as input and all
718  * remaining packets should be output
719  * @return 1 if a packet was output, 0 if no packet could be output
720  * (in which case out may be uninitialized), < 0 if an error occurred
721  */
723  AVPacket *pkt, int flush);
724 
726 
727 /**
728  * Return the frame duration in seconds. Return 0 if not available.
729  */
730 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
732 
733 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
734 
735 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
736 
737 int ff_is_intra_only(enum AVCodecID id);
738 
739 /**
740  * Select a PCM codec based on the given parameters.
741  *
742  * @param bps bits-per-sample
743  * @param flt floating-point
744  * @param be big-endian
745  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
746  * e.g. the 1st bit indicates if 8-bit should be signed or
747  * unsigned, the 2nd bit indicates if 16-bit should be signed or
748  * unsigned, etc... This is useful for formats such as WAVE where
749  * only 8-bit is unsigned and all other bit depths are signed.
750  * @return a PCM codec id or AV_CODEC_ID_NONE
751  */
752 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
753 
754 /**
755  * Chooses a timebase for muxing the specified stream.
756  *
757  * The chosen timebase allows sample accurate timestamps based
758  * on the framerate or sample rate for audio streams. It also is
759  * at least as precise as 1/min_precision would be.
760  */
761 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
762 
763 /**
764  * Chooses a timebase for muxing the specified stream.
765  */
767 
768 /**
769  * Generate standard extradata for AVC-Intra based on width/height and field
770  * order.
771  */
773 
774 /**
775  * Add a bitstream filter to a stream.
776  *
777  * @param st output stream to add a filter to
778  * @param name the name of the filter to add
779  * @param args filter-specific argument string
780  * @return >0 on success;
781  * AVERROR code on failure
782  */
783 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
784 
785 /**
786  * Copy encoding parameters from source to destination stream
787  *
788  * @param dst pointer to destination AVStream
789  * @param src pointer to source AVStream
790  * @return >=0 on success, AVERROR code on error
791  */
793 
794 /**
795  * Wrap avpriv_io_move and log if error happens.
796  *
797  * @param url_src source path
798  * @param url_dst destination path
799  * @return 0 or AVERROR on failure
800  */
801 int ff_rename(const char *url_src, const char *url_dst, void *logctx);
802 
803 /**
804  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
805  * which is always set to 0.
806  *
807  * Previously allocated extradata in par will be freed.
808  *
809  * @param size size of extradata
810  * @return 0 if OK, AVERROR_xxx on error
811  */
813 
814 /**
815  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
816  * which is always set to 0 and fill it from pb.
817  *
818  * @param size size of extradata
819  * @return >= 0 if OK, AVERROR_xxx on error
820  */
822 
823 /**
824  * add frame for rfps calculation.
825  *
826  * @param dts timestamp of the i-th frame
827  * @return 0 if OK, AVERROR_xxx on error
828  */
829 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
830 
832 
833 /**
834  * Flags for AVFormatContext.write_uncoded_frame()
835  */
837 
838  /**
839  * Query whether the feature is possible on this stream.
840  * The frame argument is ignored.
841  */
843 
844 };
845 
846 /**
847  * Copies the whilelists from one context to the other
848  */
850 
851 /**
852  * Returned by demuxers to indicate that data was consumed but discarded
853  * (ignored streams or junk data). The framework will re-call the demuxer.
854  */
855 #define FFERROR_REDO FFERRTAG('R','E','D','O')
856 
857 /**
858  * Utility function to open IO stream of output format.
859  *
860  * @param s AVFormatContext
861  * @param url URL or file name to open for writing
862  * @options optional options which will be passed to io_open callback
863  * @return >=0 on success, negative AVERROR in case of failure
864  */
866 
867 /*
868  * A wrapper around AVFormatContext.io_close that should be used
869  * instead of calling the pointer directly.
870  */
872 
873 /**
874  * Utility function to check if the file uses http or https protocol
875  *
876  * @param s AVFormatContext
877  * @param filename URL or file name to open for writing
878  */
879 int ff_is_http_proto(char *filename);
880 
881 /**
882  * Parse creation_time in AVFormatContext metadata if exists and warn if the
883  * parsing fails.
884  *
885  * @param s AVFormatContext
886  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
887  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
888  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
889  */
890 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
891 
892 /**
893  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
894  * timestamp string.
895  *
896  * @param s AVFormatContext
897  * @return <0 on error
898  */
900 
901 #define CONTAINS_PAL 2
902 /**
903  * Reshuffles the lines to use the user specified stride.
904  *
905  * @param ppkt input and output packet
906  * @return negative error code or
907  * 0 if no new packet was allocated
908  * non-zero if a new packet was allocated and ppkt has to be freed
909  * CONTAINS_PAL if in addition to a new packet the old contained a palette
910  */
911 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
912 
913 /**
914  * Retrieves the palette from a packet, either from side data, or
915  * appended to the video data in the packet itself (raw video only).
916  * It is commonly used after a call to ff_reshuffle_raw_rgb().
917  *
918  * Use 0 for the ret parameter to check for side data only.
919  *
920  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
921  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
922  * @param palette pointer to palette buffer
923  * @return negative error code or
924  * 1 if the packet has a palette, else 0
925  */
926 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
927 
928 /**
929  * Finalize buf into extradata and set its size appropriately.
930  */
931 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
932 
933 /**
934  * Find the next packet in the interleaving queue for the given stream.
935  *
936  * @return a pointer to a packet if one was found, NULL otherwise.
937  */
938 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream);
939 
940 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset);
941 
942 int ff_lock_avformat(void);
943 int ff_unlock_avformat(void);
944 
945 /**
946  * Set AVFormatContext url field to the provided pointer. The pointer must
947  * point to a valid string. The existing url field is freed if necessary. Also
948  * set the legacy filename field to the same string which was provided in url.
949  */
950 void ff_format_set_url(AVFormatContext *s, char *url);
951 
952 void avpriv_register_devices(const AVOutputFormat * const o[], const AVInputFormat * const i[]);
953 
954 #endif /* AVFORMAT_INTERNAL_H */
AVStreamInternal::priv_pts
FFFrac * priv_pts
Definition: internal.h:215
be
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it be(in the first position) for now. Options ------- Then comes the options array. This is what will define the user accessible options. For example
AVStreamInternal::codec_info_nb_frames
int codec_info_nb_frames
Number of frames that have been demuxed during avformat_find_stream_info()
Definition: internal.h:384
ff_get_pcm_codec_id
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags)
Select a PCM codec based on the given parameters.
Definition: utils.c:3090
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
ff_rfps_add_frame
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts)
add frame for rfps calculation.
Definition: utils.c:3295
AVStreamInternal::reorder
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:175
ff_ntp_time
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:4554
ff_get_extradata
int ff_get_extradata(AVFormatContext *s, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:3279
out
FILE * out
Definition: movenc.c:54
AVFormatInternal::parse_queue_end
struct PacketList * parse_queue_end
Definition: internal.h:94
AVStreamInternal::avctx
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:192
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
ff_compute_frame_duration
void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)
Return the frame duration in seconds.
Definition: utils.c:899
ff_find_last_ts
int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))
Definition: utils.c:2164
AVFormatInternal::avoid_negative_ts_use_pts
int avoid_negative_ts_use_pts
Definition: internal.h:137
ff_format_output_open
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5442
AVCodecTag::id
enum AVCodecID id
Definition: internal.h:43
MAX_STD_TIMEBASES
#define MAX_STD_TIMEBASES
Definition: internal.h:217
ff_gen_search
int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))
Perform a binary search using read_timestamp().
Definition: utils.c:2202
ff_get_formatted_ntp_time
uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us)
Get the NTP time stamp formatted as per the RFC-5905.
Definition: utils.c:4559
ff_free_stream
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:4293
AVStreamInternal::last_dts_for_order_check
int64_t last_dts_for_order_check
Internal data to analyze DTS and detect faulty mpeg streams.
Definition: internal.h:346
AVStreamInternal::interleaver_chunk_size
int64_t interleaver_chunk_size
Definition: internal.h:255
ff_read_line_to_bprint_overwrite
int64_t ff_read_line_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp)
Read a whole line of text from AVIOContext to an AVBPrint buffer overwriting its contents.
Definition: aviobuf.c:828
ff_add_index_entry
int ff_add_index_entry(AVIndexEntry **index_entries, int *nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Internal version of av_add_index_entry.
Definition: utils.c:1878
PacketList
Definition: packet_internal.h:26
data
const char data[16]
Definition: mxf.c:142
AVStreamInternal::info
struct AVStreamInternal::@260 * info
Stream information used internally by avformat_find_stream_info()
ff_parse_creation_time_metadata
int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds)
Parse creation_time in AVFormatContext metadata if exists and warn if the parsing fails.
Definition: utils.c:5464
AVStreamInternal::probe_packets
int probe_packets
Number of packets to buffer for codec probing.
Definition: internal.h:375
ff_parse_ntp_time
uint64_t ff_parse_ntp_time(uint64_t ntp_ts)
Parse the NTP time in micro seconds (since NTP epoch).
Definition: utils.c:4581
AVFormatInternal::packet_buffer
struct PacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:76
ff_read_line_to_bprint
int64_t ff_read_line_to_bprint(AVIOContext *s, AVBPrint *bp)
Read a whole line of text from AVIOContext to an AVBPrint buffer.
Definition: aviobuf.c:797
AVStreamInternal::inject_global_side_data
int inject_global_side_data
Internal data to inject global side data.
Definition: internal.h:353
AVDictionary
Definition: dict.c:30
ff_get_chomp_line
int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen)
Same as ff_get_line but strip the white-space characters in the text tail.
Definition: aviobuf.c:789
AVStreamInternal::bsfc
AVBSFContext * bsfc
bitstream filter to run on stream
Definition: internal.h:182
ff_choose_chroma_location
enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:106
AVWriteUncodedFrameFlags
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:836
os_support.h
sample_rate
sample_rate
Definition: ffmpeg_filter.c:156
AVBSFContext
The bitstream filter state.
Definition: bsf.h:49
AVStreamInternal::skip_samples
int skip_samples
Number of samples to skip at the start of the frame decoded from the next packet.
Definition: internal.h:274
AVIndexEntry
Definition: avformat.h:762
AVStreamInternal::last_duration
int64_t last_duration
Definition: internal.h:238
ff_seek_frame_binary
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().
Definition: utils.c:2096
ff_bprint_to_codecpar_extradata
int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf)
Finalize buf into extradata and set its size appropriately.
Definition: utils.c:5515
ff_sdp_write_media
void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt)
Append the media-specific SDP fragment for the media stream c to the buffer buff.
Definition: sdp.c:833
ff_unlock_avformat
int ff_unlock_avformat(void)
Definition: utils.c:84
ff_is_intra_only
int ff_is_intra_only(enum AVCodecID id)
Definition: utils.c:955
CodecMime
Definition: internal.h:47
ff_guess_image2_codec
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:106
AVFormatInternal
Definition: internal.h:64
AVFormatInternal::prefer_codec_framerate
int prefer_codec_framerate
Definition: internal.h:162
AVStreamParseType
AVStreamParseType
Definition: avformat.h:751
ff_get_line
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:772
AVChapter
Definition: avformat.h:1063
AVFormatInternal::data_offset
int64_t data_offset
offset of the first packet
Definition: internal.h:80
ff_read_packet
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:767
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
ff_data_to_hex
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4750
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2900
AVFormatInternal::raw_packet_buffer_remaining_size
int raw_packet_buffer_remaining_size
Definition: internal.h:117
AVFormatInternal::offset
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:124
AVStreamInternal::stream_identifier
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: internal.h:391
pkt
AVPacket * pkt
Definition: movenc.c:59
AVInputFormat
Definition: avformat.h:616
AVCodecTag
Definition: internal.h:42
ff_write_chained
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src, int interleave)
Write a packet to another muxer than the one the user originally intended.
Definition: mux.c:1290
ff_framehash_write_header
int ff_framehash_write_header(AVFormatContext *s)
Set the timebase for each stream from the corresponding codec timebase and print it.
Definition: framehash.c:23
AVStreamInternal::mux_ts_offset
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing.
Definition: internal.h:309
width
#define width
AVFormatInternal::shortest_end
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:142
AVStreamInternal::display_aspect_ratio
AVRational display_aspect_ratio
display aspect ratio (0 if unknown)
Definition: internal.h:360
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVStreamInternal::codec_info_duration_fields
int64_t codec_info_duration_fields
Definition: internal.h:228
AVStreamInternal::pts_wrap_behavior
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: internal.h:326
ff_rename
int ff_rename(const char *url_src, const char *url_dst, void *logctx)
Wrap avpriv_io_move and log if error happens.
Definition: avio.c:662
avpriv_stream_set_need_parsing
void avpriv_stream_set_need_parsing(AVStream *st, enum AVStreamParseType type)
Definition: utils.c:129
ff_is_http_proto
int ff_is_http_proto(char *filename)
Utility function to check if the file uses http or https protocol.
Definition: utils.c:5459
ff_interleave_add_packet
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
Add packet to an AVFormatContext's packet_buffer list, determining its interleaved position using com...
Definition: mux.c:792
channels
channels
Definition: aptx.h:33
AVStreamInternal::last_IP_pts
int64_t last_IP_pts
Definition: internal.h:369
key
const char * key
Definition: hwcontext_opencl.c:168
AVStreamInternal::update_initial_durations_done
int update_initial_durations_done
Internal data to prevent doing update_initial_durations() twice.
Definition: internal.h:331
AVStreamInternal::avctx_inited
int avctx_inited
1 if avctx has been initialized with the values from the codec parameters
Definition: internal.h:196
ff_hex_to_data
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4771
AVStreamInternal::duration_gcd
int64_t duration_gcd
Definition: internal.h:223
context
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your context
Definition: writing_filters.txt:91
AVFormatContext
Format I/O context.
Definition: avformat.h:1106
ff_update_cur_dts
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: utils.c:1851
AVStreamInternal::duration_count
int duration_count
Definition: internal.h:224
AVStreamInternal::nb_decoded_frames
int nb_decoded_frames
Number of internally decoded frames, used internally in libavformat, do not access its lifetime diffe...
Definition: internal.h:304
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:592
AVStreamInternal::codec_info_duration
int64_t codec_info_duration
Definition: internal.h:227
ff_choose_timebase
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:90
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVStreamInternal::frame_delay_evidence
int frame_delay_evidence
Definition: internal.h:229
AVStreamInternal::skip_to_keyframe
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: internal.h:269
AVFormatInternal::parse_pkt
AVPacket * parse_pkt
The generic code uses this as a temporary packet to parse packets; it may also be used for other mean...
Definition: internal.h:107
ff_get_muxer_ts_offset
int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)
Definition: mux.c:1012
ff_stream_add_bitstream_filter
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:5394
AVStreamInternal::dts_misordered
uint8_t dts_misordered
Definition: internal.h:348
src
#define src
Definition: vp8dsp.c:255
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
ff_reshuffle_raw_rgb
int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride)
Reshuffles the lines to use the user specified stride.
Definition: rawutils.c:25
AVFormatInternal::streams_initialized
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:152
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
AVStreamInternal::fps_first_dts_idx
int fps_first_dts_idx
Definition: internal.h:244
interleave
static void interleave(uint8_t *dst, uint8_t *src, int w, int h, int dst_linesize, int src_linesize, enum FilterMode mode, int swap)
Definition: vf_il.c:114
options
const OptionDef options[]
AVFormatInternal::parse_queue
struct PacketList * parse_queue
Packets split by the parser get queued here.
Definition: internal.h:93
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVStreamInternal::rfps_duration_sum
int64_t rfps_duration_sum
Definition: internal.h:225
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3078
FFFrac::val
int64_t val
Definition: internal.h:60
AVStreamInternal::extract_extradata
struct AVStreamInternal::@259 extract_extradata
AVStreamInternal::fps_last_dts_idx
int fps_last_dts_idx
Definition: internal.h:246
AVStreamInternal::inited
int inited
Definition: internal.h:205
AVStreamInternal::request_probe
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: internal.h:264
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4799
bps
unsigned bps
Definition: movenc.c:1595
ff_copy_whiteblacklists
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:144
AVStreamInternal::last_discard_sample
int64_t last_discard_sample
The sample after last sample that is intended to be discarded after first_discard_sample.
Definition: internal.h:298
AVStreamInternal::is_intra_only
int is_intra_only
Definition: internal.h:213
size
int size
Definition: twinvq_data.h:10344
AVStreamInternal::found_decoder
int found_decoder
0 -> decoder has not been searched for yet.
Definition: internal.h:236
ff_lock_avformat
int ff_lock_avformat(void)
Definition: utils.c:79
AVStreamInternal::nb_index_entries
int nb_index_entries
Definition: internal.h:252
AVStreamInternal::pts_wrap_reference
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: internal.h:314
AVFormatInternal::offset_timebase
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:129
AVFormatInternal::raw_packet_buffer
struct PacketList * raw_packet_buffer
Raw packets from the demuxer, prior to parsing and decoding.
Definition: internal.h:88
height
#define height
MAX_REORDER_DELAY
#define MAX_REORDER_DELAY
Definition: internal.h:333
AVStreamInternal::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:250
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
ff_interleaved_peek
const AVPacket * ff_interleaved_peek(AVFormatContext *s, int stream)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1028
AVStreamInternal::last_in_packet_buffer
struct PacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: internal.h:367
AVStreamInternal::pts_buffer
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: internal.h:341
AVChromaLocation
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:595
ff_standardize_creation_time
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5481
bprint.h
i
int i
Definition: input.c:407
AVStreamInternal
Definition: internal.h:170
AVOutputFormat
Definition: avformat.h:490
AVStreamInternal::start_skip_samples
int64_t start_skip_samples
If not 0, the number of samples that should be skipped from the start of the stream (the samples are ...
Definition: internal.h:283
AVStreamInternal::index_entries_allocated_size
unsigned int index_entries_allocated_size
Definition: internal.h:253
AVStreamInternal::fps_first_dts
int64_t fps_first_dts
Those are used for average framerate estimation.
Definition: internal.h:243
avpriv_new_chapter
AVChapter * avpriv_new_chapter(AVFormatContext *s, int64_t id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4487
AVStreamInternal::parser
struct AVCodecParserContext * parser
Definition: internal.h:379
ff_add_param_change
int ff_add_param_change(AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)
Add side data to a packet for changing parameters to the given values.
Definition: utils.c:4926
AVFormatInternal::nb_interleaved_streams
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:69
AVCodecParserContext
Definition: avcodec.h:2880
AVStreamInternal::probe_data
AVProbeData probe_data
Definition: internal.h:362
ff_rfps_calculate
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3355
tag
uint32_t tag
Definition: movenc.c:1594
ret
ret
Definition: filter_design.txt:187
ff_get_packet_palette
int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette)
Retrieves the palette from a packet, either from side data, or appended to the video data in the pack...
Definition: utils.c:5490
AVStream
Stream structure.
Definition: avformat.h:832
AVStreamInternal::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:378
AVStreamInternal::last_IP_duration
int last_IP_duration
Definition: internal.h:370
lowercase
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in lowercase
Definition: writing_filters.txt:89
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
ff_format_set_url
void ff_format_set_url(AVFormatContext *s, char *url)
Set AVFormatContext url field to the provided pointer.
Definition: utils.c:5606
AVStreamInternal::interleaver_chunk_duration
int64_t interleaver_chunk_duration
Definition: internal.h:256
AVStreamInternal::fps_last_dts
int64_t fps_last_dts
Definition: internal.h:245
AVCodecContext
main external API structure.
Definition: avcodec.h:501
compare
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:106
ff_stream_encode_params_copy
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4204
AVStreamInternal::pts_reorder_error_count
uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1]
Definition: internal.h:339
AVStreamInternal::first_discard_sample
int64_t first_discard_sample
If not 0, the first audio sample that should be discarded from the stream.
Definition: internal.h:291
ff_reduce_index
void ff_reduce_index(AVFormatContext *s, int stream_index)
Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by dis...
Definition: utils.c:1865
ff_codec_get_tag
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3068
ff_parse_key_val_cb
void(* ff_parse_key_val_cb)(void *context, const char *key, int key_len, char **dest, int *dest_len)
Callback function type for ff_parse_key_value.
Definition: internal.h:561
ff_index_search_timestamp
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
Internal version of av_index_search_timestamp.
Definition: utils.c:1946
AVFormatInternal::id3v2_meta
AVDictionary * id3v2_meta
ID3v2 tag useful for MP3 demuxing.
Definition: internal.h:157
CodecMime::str
char str[32]
Definition: internal.h:48
AVStreamInternal::dts_ordered
uint8_t dts_ordered
Definition: internal.h:347
AVFormatInternal::initialized
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:147
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5452
CodecMime::id
enum AVCodecID id
Definition: internal.h:49
FFFrac::num
int64_t num
Definition: internal.h:60
AVStreamInternal::need_context_update
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
Definition: internal.h:211
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:84
AVFormatInternal::inject_global_side_data
int inject_global_side_data
Definition: internal.h:135
AVStreamInternal::orig_codec_id
enum AVCodecID orig_codec_id
Definition: internal.h:198
AVFormatInternal::chapter_ids_monotonic
int chapter_ids_monotonic
Set if chapter ids are strictly monotonic.
Definition: internal.h:167
ff_mkdir_p
int ff_mkdir_p(const char *path)
Automatically create sub-directories.
Definition: utils.c:4716
AVStreamInternal::pts_reorder_error
int64_t pts_reorder_error[MAX_REORDER_DELAY+1]
Internal data to generate dts from pts.
Definition: internal.h:338
ff_generate_avci_extradata
int ff_generate_avci_extradata(AVStream *st)
Generate standard extradata for AVC-Intra based on width/height and field order.
Definition: utils.c:5188
AVFormatInternal::packet_buffer_end
struct PacketList * packet_buffer_end
Definition: internal.h:77
AVPacket
This structure stores compressed data.
Definition: packet.h:342
ff_read_frame_flush
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1816
ff_find_stream_index
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4878
AVStreamInternal::bsf
AVBSFContext * bsf
Definition: internal.h:204
AV_WRITE_UNCODED_FRAME_QUERY
@ AV_WRITE_UNCODED_FRAME_QUERY
Query whether the feature is possible on this stream.
Definition: internal.h:842
AVStreamInternal::duration_error
double(* duration_error)[2][MAX_STD_TIMEBASES]
Definition: internal.h:226
int32_t
int32_t
Definition: audioconvert.c:56
convert_header.str
string str
Definition: convert_header.py:20
AVStreamInternal::last_dts
int64_t last_dts
Definition: internal.h:222
distance
static float distance(float x, float y, int band)
Definition: nellymoserenc.c:233
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFormatInternal::pkt
AVPacket * pkt
Used to hold temporary packets.
Definition: internal.h:112
FFFrac
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:59
AVFormatInternal::raw_packet_buffer_end
struct PacketList * raw_packet_buffer_end
Definition: internal.h:89
FFFrac::den
int64_t den
Definition: internal.h:60
AVCodecTag::tag
unsigned int tag
Definition: internal.h:44
avpriv_register_devices
void avpriv_register_devices(const AVOutputFormat *const o[], const AVInputFormat *const i[])
Definition: allformats.c:573
ff_interleave_packet_per_dts
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Interleave an AVPacket per dts so it can be muxed.
Definition: mux.c:894
ff_configure_buffers_for_index
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: utils.c:1989
ff_add_attached_pic
int ff_add_attached_pic(AVFormatContext *s, AVStream *st, AVIOContext *pb, AVBufferRef **buf, int size)
Add an attached pic to an AVStream.
Definition: utils.c:420
ff_parse_key_value
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, void *context)
Parse a string with comma-separated key=value pairs.
Definition: utils.c:4824
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:3261
AVStreamInternal::bitstream_checked
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:187