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 
28 #include "libavcodec/avcodec.h"
29 
30 #include "avformat.h"
31 #include "os_support.h"
32 
33 #define MAX_URL_SIZE 4096
34 
35 /** size of probe buffer, for guessing file type from file contents */
36 #define PROBE_BUF_MIN 2048
37 #define PROBE_BUF_MAX (1 << 20)
38 
39 #ifdef DEBUG
40 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
41 #else
42 # define hex_dump_debug(class, buf, size) do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
43 #endif
44 
45 typedef struct AVCodecTag {
46  enum AVCodecID id;
47  unsigned int tag;
48 } AVCodecTag;
49 
50 typedef struct CodecMime{
51  char str[32];
52  enum AVCodecID id;
53 } CodecMime;
54 
55 /*************************************************/
56 /* fractional numbers for exact pts handling */
57 
58 /**
59  * The exact value of the fractional number is: 'val + num / den'.
60  * num is assumed to be 0 <= num < den.
61  */
62 typedef struct FFFrac {
63  int64_t val, num, den;
64 } FFFrac;
65 
66 
68  /**
69  * Number of streams relevant for interleaving.
70  * Muxing only.
71  */
73 
74  /**
75  * This buffer is only needed when packets were already buffered but
76  * not decoded, for example to get the codec parameters in MPEG
77  * streams.
78  */
81 
82  /* av_seek_frame() support */
83  int64_t data_offset; /**< offset of the first packet */
84 
85  /**
86  * Raw packets from the demuxer, prior to parsing and decoding.
87  * This buffer is used for buffering packets until the codec can
88  * be identified, as parsing cannot be done without knowing the
89  * codec.
90  */
93  /**
94  * Packets split by the parser get queued here.
95  */
98  /**
99  * The generic code uses this as a temporary packet
100  * to parse packets; it may also be used for other means
101  * for short periods that are guaranteed not to overlap
102  * with calls to av_read_frame() (or ff_read_packet())
103  * or with each other.
104  * It may be used by demuxers as a replacement for
105  * stack packets (unless they call one of the aforementioned
106  * functions with their own AVFormatContext).
107  * Every user has to ensure that this packet is blank
108  * after using it.
109  */
111 
112  /**
113  * Used to hold temporary packets.
114  */
116  /**
117  * Remaining size available for raw_packet_buffer, in bytes.
118  */
119 #define RAW_PACKET_BUFFER_SIZE 2500000
121 
122  /**
123  * Offset to remap timestamps to be non-negative.
124  * Expressed in timebase units.
125  * @see AVStream.mux_ts_offset
126  */
127  int64_t offset;
128 
129  /**
130  * Timebase for the timestamp offset.
131  */
133 
134 #if FF_API_COMPUTE_PKT_FIELDS2
135  int missing_ts_warning;
136 #endif
137 
139 
141 
142  /**
143  * Timestamp of the end of the shortest stream.
144  */
145  int64_t shortest_end;
146 
147  /**
148  * Whether or not avformat_init_output has already been called
149  */
151 
152  /**
153  * Whether or not avformat_init_output fully initialized streams
154  */
156 
157  /**
158  * ID3v2 tag useful for MP3 demuxing
159  */
161 
162  /*
163  * Prefer the codec framerate for avg_frame_rate computation.
164  */
166 
167  /**
168  * Set if chapter ids are strictly monotonic.
169  */
171 };
172 
174  /**
175  * Set to 1 if the codec allows reordering, so pts can be different
176  * from dts.
177  */
178  int reorder;
179 
180  /**
181  * bitstream filter to run on stream
182  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
183  * - decoding: unused
184  */
186 
187  /**
188  * Whether or not check_bitstream should still be run on each packet
189  */
191 
192  /**
193  * The codec context used by avformat_find_stream_info, the parser, etc.
194  */
196  /**
197  * 1 if avctx has been initialized with the values from the codec parameters
198  */
200 
202 
203  /* the context for extracting extradata in find_stream_info()
204  * inited=1/bsf=NULL signals that extracting is not possible (codec not
205  * supported) */
206  struct {
208  int inited;
210 
211  /**
212  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
213  */
215 
217 
219 
220 #define MAX_STD_TIMEBASES (30*12+30+3+6)
221  /**
222  * Stream information used internally by avformat_find_stream_info()
223  */
224  struct {
225  int64_t last_dts;
226  int64_t duration_gcd;
233 
234  /**
235  * 0 -> decoder has not been searched for yet.
236  * >0 -> decoder found
237  * <0 -> decoder with codec_id == -found_decoder has not been found
238  */
240 
241  int64_t last_duration;
242 
243  /**
244  * Those are used for average framerate estimation.
245  */
246  int64_t fps_first_dts;
248  int64_t fps_last_dts;
250 
251  } *info;
252 
253  AVIndexEntry *index_entries; /**< Only used if the format does not
254  support seeking natively. */
257 
260 
261  /**
262  * stream probing state
263  * -1 -> probing finished
264  * 0 -> no probing requested
265  * rest -> perform probing with request_probe being the minimum score to accept.
266  */
268  /**
269  * Indicates that everything up to the next keyframe
270  * should be discarded.
271  */
273 
274  /**
275  * Number of samples to skip at the start of the frame decoded from the next packet.
276  */
278 
279  /**
280  * If not 0, the number of samples that should be skipped from the start of
281  * the stream (the samples are removed from packets with pts==0, which also
282  * assumes negative timestamps do not happen).
283  * Intended for use with formats such as mp3 with ad-hoc gapless audio
284  * support.
285  */
287 
288  /**
289  * If not 0, the first audio sample that should be discarded from the stream.
290  * This is broken by design (needs global sample count), but can't be
291  * avoided for broken by design formats such as mp3 with ad-hoc gapless
292  * audio support.
293  */
295 
296  /**
297  * The sample after last sample that is intended to be discarded after
298  * first_discard_sample. Works on frame boundaries only. Used to prevent
299  * early EOF if the gapless info is broken (considered concatenated mp3s).
300  */
302 
303  /**
304  * Number of internally decoded frames, used internally in libavformat, do not access
305  * its lifetime differs from info which is why it is not in that structure.
306  */
308 
309  /**
310  * Timestamp offset added to timestamps before muxing
311  */
312  int64_t mux_ts_offset;
313 
314  /**
315  * Internal data to check for wrapping of the time stamp
316  */
318 
319  /**
320  * Options for behavior, when a wrap is detected.
321  *
322  * Defined by AV_PTS_WRAP_ values.
323  *
324  * If correction is enabled, there are two possibilities:
325  * If the first time stamp is near the wrap point, the wrap offset
326  * will be subtracted, which will create negative time stamps.
327  * Otherwise the offset will be added.
328  */
330 
331  /**
332  * Internal data to prevent doing update_initial_durations() twice
333  */
335 
336 #define MAX_REORDER_DELAY 16
337 
338  /**
339  * Internal data to generate dts from pts
340  */
343 
345 
346  /**
347  * Internal data to analyze DTS and detect faulty mpeg streams
348  */
350  uint8_t dts_ordered;
351  uint8_t dts_misordered;
352 
353  /**
354  * Internal data to inject global side data
355  */
357 
358  /**
359  * display aspect ratio (0 if unknown)
360  * - encoding: unused
361  * - decoding: Set by libavformat to calculate sample_aspect_ratio internally
362  */
364 
366 
367  /**
368  * last packet in packet_buffer for this stream when muxing.
369  */
371 
372  int64_t last_IP_pts;
374 
375  /**
376  * Number of packets to buffer for codec probing
377  */
379 
380  /* av_read_frame() support */
383 
384  /**
385  * Number of frames that have been demuxed during avformat_find_stream_info()
386  */
388 
389  /**
390  * Stream Identifier
391  * This is the MPEG-TS stream identifier +1
392  * 0 means unknown
393  */
395 
396  // Timestamp generation support:
397  /**
398  * Timestamp corresponding to the last dts sync point.
399  *
400  * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
401  * a DTS is received from the underlying container. Otherwise set to
402  * AV_NOPTS_VALUE by default.
403  */
404  int64_t first_dts;
405  int64_t cur_dts;
406 };
407 
409 
410 #ifdef __GNUC__
411 #define dynarray_add(tab, nb_ptr, elem)\
412 do {\
413  __typeof__(tab) _tab = (tab);\
414  __typeof__(elem) _elem = (elem);\
415  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
416  av_dynarray_add(_tab, nb_ptr, _elem);\
417 } while(0)
418 #else
419 #define dynarray_add(tab, nb_ptr, elem)\
420 do {\
421  av_dynarray_add((tab), nb_ptr, (elem));\
422 } while(0)
423 #endif
424 
425 /**
426  * Automatically create sub-directories
427  *
428  * @param path will create sub-directories by path
429  * @return 0, or < 0 on error
430  */
431 int ff_mkdir_p(const char *path);
432 
433 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
434 
435 /**
436  * Parse a string of hexadecimal strings. Any space between the hexadecimal
437  * digits is ignored.
438  *
439  * @param data if non-null, the parsed data is written to this pointer
440  * @param p the string to parse
441  * @return the number of bytes written (or to be written, if data is null)
442  */
443 int ff_hex_to_data(uint8_t *data, const char *p);
444 
445 /**
446  * Add packet to an AVFormatContext's packet_buffer list, determining its
447  * interleaved position using compare() function argument.
448  * @return 0 on success, < 0 on error. pkt will always be blank on return.
449  */
451  int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *));
452 
454 
455 #define NTP_OFFSET 2208988800ULL
456 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
457 
458 /** Get the current time since NTP epoch in microseconds. */
459 uint64_t ff_ntp_time(void);
460 
461 /**
462  * Get the NTP time stamp formatted as per the RFC-5905.
463  *
464  * @param ntp_time NTP time in micro seconds (since NTP epoch)
465  * @return the formatted NTP time stamp
466  */
467 uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us);
468 
469 /**
470  * Parse the NTP time in micro seconds (since NTP epoch).
471  *
472  * @param ntp_ts NTP time stamp formatted as per the RFC-5905.
473  * @return the time in micro seconds (since NTP epoch)
474  */
475 uint64_t ff_parse_ntp_time(uint64_t ntp_ts);
476 
477 /**
478  * Append the media-specific SDP fragment for the media stream c
479  * to the buffer buff.
480  *
481  * Note, the buffer needs to be initialized, since it is appended to
482  * existing content.
483  *
484  * @param buff the buffer to append the SDP fragment to
485  * @param size the size of the buff buffer
486  * @param st the AVStream of the media to describe
487  * @param idx the global stream index
488  * @param dest_addr the destination address of the media stream, may be NULL
489  * @param dest_type the destination address type, may be NULL
490  * @param port the destination port of the media stream, 0 if unknown
491  * @param ttl the time to live of the stream, 0 if not multicast
492  * @param fmt the AVFormatContext, which might contain options modifying
493  * the generated SDP
494  */
495 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
496  const char *dest_addr, const char *dest_type,
497  int port, int ttl, AVFormatContext *fmt);
498 
499 /**
500  * Write a packet to another muxer than the one the user originally
501  * intended. Useful when chaining muxers, where one muxer internally
502  * writes a received packet to another muxer.
503  *
504  * @param dst the muxer to write the packet to
505  * @param dst_stream the stream index within dst to write the packet to
506  * @param pkt the packet to be written
507  * @param src the muxer the packet originally was intended for
508  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
509  * @return the value av_write_frame returned
510  */
511 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
513 
514 /**
515  * Read a whole line of text from AVIOContext. Stop reading after reaching
516  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
517  * and may be truncated if the buffer is too small.
518  *
519  * @param s the read-only AVIOContext
520  * @param buf buffer to store the read line
521  * @param maxlen size of the buffer
522  * @return the length of the string written in the buffer, not including the
523  * final \\0
524  */
525 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
526 
527 /**
528  * Same as ff_get_line but strip the white-space characters in the text tail
529  *
530  * @param s the read-only AVIOContext
531  * @param buf buffer to store the read line
532  * @param maxlen size of the buffer
533  * @return the length of the string written in the buffer
534  */
535 int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen);
536 
537 /**
538  * Read a whole line of text from AVIOContext to an AVBPrint buffer. Stop
539  * reading after reaching a \\r, a \\n, a \\r\\n, a \\0 or EOF. The line
540  * ending characters are NOT included in the buffer, but they are skipped on
541  * the input.
542  *
543  * @param s the read-only AVIOContext
544  * @param bp the AVBPrint buffer
545  * @return the length of the read line, not including the line endings,
546  * negative on error.
547  */
548 int64_t ff_read_line_to_bprint(AVIOContext *s, AVBPrint *bp);
549 
550 /**
551  * Read a whole line of text from AVIOContext to an AVBPrint buffer overwriting
552  * its contents. Stop reading after reaching a \\r, a \\n, a \\r\\n, a \\0 or
553  * EOF. The line ending characters are NOT included in the buffer, but they
554  * are skipped on the input.
555  *
556  * @param s the read-only AVIOContext
557  * @param bp the AVBPrint buffer
558  * @return the length of the read line not including the line endings,
559  * negative on error, or if the buffer becomes truncated.
560  */
561 int64_t ff_read_line_to_bprint_overwrite(AVIOContext *s, AVBPrint *bp);
562 
563 #define SPACE_CHARS " \t\r\n"
564 
565 /**
566  * Callback function type for ff_parse_key_value.
567  *
568  * @param key a pointer to the key
569  * @param key_len the number of bytes that belong to the key, including the '='
570  * char
571  * @param dest return the destination pointer for the value in *dest, may
572  * be null to ignore the value
573  * @param dest_len the length of the *dest buffer
574  */
575 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
576  int key_len, char **dest, int *dest_len);
577 /**
578  * Parse a string with comma-separated key=value pairs. The value strings
579  * may be quoted and may contain escaped characters within quoted strings.
580  *
581  * @param str the string to parse
582  * @param callback_get_buf function that returns where to store the
583  * unescaped value string.
584  * @param context the opaque context pointer to pass to callback_get_buf
585  */
586 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
587  void *context);
588 
589 /**
590  * Find stream index based on format-specific stream ID
591  * @return stream index, or < 0 on error
592  */
594 
595 /**
596  * Internal version of av_index_search_timestamp
597  */
598 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
599  int64_t wanted_timestamp, int flags);
600 
601 /**
602  * Internal version of av_add_index_entry
603  */
604 int ff_add_index_entry(AVIndexEntry **index_entries,
605  int *nb_index_entries,
606  unsigned int *index_entries_allocated_size,
607  int64_t pos, int64_t timestamp, int size, int distance, int flags);
608 
609 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
610 
611 /**
612  * Add a new chapter.
613  *
614  * @param s media file handle
615  * @param id unique ID for this chapter
616  * @param start chapter start time in time_base units
617  * @param end chapter end time in time_base units
618  * @param title chapter title
619  *
620  * @return AVChapter or NULL on error
621  */
622 AVChapter *avpriv_new_chapter(AVFormatContext *s, int64_t id, AVRational time_base,
623  int64_t start, int64_t end, const char *title);
624 
625 /**
626  * Ensure the index uses less memory than the maximum specified in
627  * AVFormatContext.max_index_size by discarding entries if it grows
628  * too large.
629  */
630 void ff_reduce_index(AVFormatContext *s, int stream_index);
631 
632 enum AVCodecID ff_guess_image2_codec(const char *filename);
633 
634 /**
635  * Perform a binary search using av_index_search_timestamp() and
636  * AVInputFormat.read_timestamp().
637  *
638  * @param target_ts target timestamp in the time base of the given stream
639  * @param stream_index stream number
640  */
641 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
642  int64_t target_ts, int flags);
643 
644 /**
645  * Update cur_dts of all streams based on the given timestamp and AVStream.
646  *
647  * Stream ref_st unchanged, others set cur_dts in their native time base.
648  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
649  * @param timestamp new dts expressed in time_base of param ref_st
650  * @param ref_st reference stream giving time_base of param timestamp
651  */
652 void avpriv_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
653 
654 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
655  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
656 
657 /**
658  * Perform a binary search using read_timestamp().
659  *
660  * @param target_ts target timestamp in the time base of the given stream
661  * @param stream_index stream number
662  */
663 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
664  int64_t target_ts, int64_t pos_min,
665  int64_t pos_max, int64_t pos_limit,
666  int64_t ts_min, int64_t ts_max,
667  int flags, int64_t *ts_ret,
668  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
669 
670 /**
671  * Set the time base and wrapping info for a given stream. This will be used
672  * to interpret the stream's timestamps. If the new time base is invalid
673  * (numerator or denominator are non-positive), it leaves the stream
674  * unchanged.
675  *
676  * @param s stream
677  * @param pts_wrap_bits number of bits effectively used by the pts
678  * (used for wrap control)
679  * @param pts_num time base numerator
680  * @param pts_den time base denominator
681  */
682 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
683  unsigned int pts_num, unsigned int pts_den);
684 
685 /**
686  * Add side data to a packet for changing parameters to the given values.
687  * Parameters set to 0 aren't included in the change.
688  */
690  uint64_t channel_layout, int32_t sample_rate,
692 
693 /**
694  * Set the timebase for each stream from the corresponding codec timebase and
695  * print it.
696  */
698 
699 /**
700  * Read a transport packet from a media file.
701  *
702  * @param s media file handle
703  * @param pkt is filled
704  * @return 0 if OK, AVERROR_xxx on error
705  */
707 
708 /**
709  * Add an attached pic to an AVStream.
710  *
711  * @param st if set, the stream to add the attached pic to;
712  * if unset, a new stream will be added to s.
713  * @param pb AVIOContext to read data from if buf is unset.
714  * @param buf if set, it contains the data and size information to be used
715  * for the attached pic; if unset, data is read from pb.
716  * @param size the size of the data to read if buf is unset.
717  *
718  * @return 0 on success, < 0 on error. On error, this function removes
719  * the stream it has added (if any).
720  */
722  AVBufferRef **buf, int size);
723 
724 /**
725  * Interleave an AVPacket per dts so it can be muxed.
726  *
727  * @param s an AVFormatContext for output. pkt resp. out will be added to
728  * resp. taken from its packet buffer.
729  * @param out the interleaved packet will be output here
730  * @param pkt the input packet; will be blank on return if not NULL
731  * @param flush 1 if no further packets are available as input and all
732  * remaining packets should be output
733  * @return 1 if a packet was output, 0 if no packet could be output
734  * (in which case out may be uninitialized), < 0 if an error occurred
735  */
737  AVPacket *pkt, int flush);
738 
740 
741 /**
742  * Return the frame duration in seconds. Return 0 if not available.
743  */
744 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
746 
747 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
748 
749 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
750 
751 int ff_is_intra_only(enum AVCodecID id);
752 
753 /**
754  * Select a PCM codec based on the given parameters.
755  *
756  * @param bps bits-per-sample
757  * @param flt floating-point
758  * @param be big-endian
759  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
760  * e.g. the 1st bit indicates if 8-bit should be signed or
761  * unsigned, the 2nd bit indicates if 16-bit should be signed or
762  * unsigned, etc... This is useful for formats such as WAVE where
763  * only 8-bit is unsigned and all other bit depths are signed.
764  * @return a PCM codec id or AV_CODEC_ID_NONE
765  */
766 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
767 
768 /**
769  * Chooses a timebase for muxing the specified stream.
770  *
771  * The chosen timebase allows sample accurate timestamps based
772  * on the framerate or sample rate for audio streams. It also is
773  * at least as precise as 1/min_precision would be.
774  */
775 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
776 
777 /**
778  * Chooses a timebase for muxing the specified stream.
779  */
781 
782 /**
783  * Generate standard extradata for AVC-Intra based on width/height and field
784  * order.
785  */
787 
788 /**
789  * Add a bitstream filter to a stream.
790  *
791  * @param st output stream to add a filter to
792  * @param name the name of the filter to add
793  * @param args filter-specific argument string
794  * @return >0 on success;
795  * AVERROR code on failure
796  */
797 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
798 
799 /**
800  * Copy encoding parameters from source to destination stream
801  *
802  * @param dst pointer to destination AVStream
803  * @param src pointer to source AVStream
804  * @return >=0 on success, AVERROR code on error
805  */
807 
808 /**
809  * Wrap ffurl_move() and log if error happens.
810  *
811  * @param url_src source path
812  * @param url_dst destination path
813  * @return 0 or AVERROR on failure
814  */
815 int ff_rename(const char *url_src, const char *url_dst, void *logctx);
816 
817 /**
818  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
819  * which is always set to 0.
820  *
821  * Previously allocated extradata in par will be freed.
822  *
823  * @param size size of extradata
824  * @return 0 if OK, AVERROR_xxx on error
825  */
827 
828 /**
829  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
830  * which is always set to 0 and fill it from pb.
831  *
832  * @param size size of extradata
833  * @return >= 0 if OK, AVERROR_xxx on error
834  */
836 
837 /**
838  * add frame for rfps calculation.
839  *
840  * @param dts timestamp of the i-th frame
841  * @return 0 if OK, AVERROR_xxx on error
842  */
843 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
844 
846 
847 /**
848  * Flags for AVFormatContext.write_uncoded_frame()
849  */
851 
852  /**
853  * Query whether the feature is possible on this stream.
854  * The frame argument is ignored.
855  */
857 
858 };
859 
860 /**
861  * Copies the whilelists from one context to the other
862  */
864 
865 /**
866  * Returned by demuxers to indicate that data was consumed but discarded
867  * (ignored streams or junk data). The framework will re-call the demuxer.
868  */
869 #define FFERROR_REDO FFERRTAG('R','E','D','O')
870 
871 /**
872  * Utility function to open IO stream of output format.
873  *
874  * @param s AVFormatContext
875  * @param url URL or file name to open for writing
876  * @options optional options which will be passed to io_open callback
877  * @return >=0 on success, negative AVERROR in case of failure
878  */
880 
881 /*
882  * A wrapper around AVFormatContext.io_close that should be used
883  * instead of calling the pointer directly.
884  */
886 
887 /**
888  * Utility function to check if the file uses http or https protocol
889  *
890  * @param s AVFormatContext
891  * @param filename URL or file name to open for writing
892  */
893 int ff_is_http_proto(char *filename);
894 
895 /**
896  * Parse creation_time in AVFormatContext metadata if exists and warn if the
897  * parsing fails.
898  *
899  * @param s AVFormatContext
900  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
901  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
902  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
903  */
904 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
905 
906 /**
907  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
908  * timestamp string.
909  *
910  * @param s AVFormatContext
911  * @return <0 on error
912  */
914 
915 #define CONTAINS_PAL 2
916 /**
917  * Reshuffles the lines to use the user specified stride.
918  *
919  * @param ppkt input and output packet
920  * @return negative error code or
921  * 0 if no new packet was allocated
922  * non-zero if a new packet was allocated and ppkt has to be freed
923  * CONTAINS_PAL if in addition to a new packet the old contained a palette
924  */
925 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
926 
927 /**
928  * Retrieves the palette from a packet, either from side data, or
929  * appended to the video data in the packet itself (raw video only).
930  * It is commonly used after a call to ff_reshuffle_raw_rgb().
931  *
932  * Use 0 for the ret parameter to check for side data only.
933  *
934  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
935  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
936  * @param palette pointer to palette buffer
937  * @return negative error code or
938  * 1 if the packet has a palette, else 0
939  */
940 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
941 
942 /**
943  * Finalize buf into extradata and set its size appropriately.
944  */
945 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
946 
947 /**
948  * Find the next packet in the interleaving queue for the given stream.
949  *
950  * @return a pointer to a packet if one was found, NULL otherwise.
951  */
952 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream);
953 
954 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset);
955 
956 int ff_lock_avformat(void);
957 int ff_unlock_avformat(void);
958 
959 /**
960  * Set AVFormatContext url field to the provided pointer. The pointer must
961  * point to a valid string. The existing url field is freed if necessary. Also
962  * set the legacy filename field to the same string which was provided in url.
963  */
964 void ff_format_set_url(AVFormatContext *s, char *url);
965 
966 void avpriv_register_devices(const AVOutputFormat * const o[], const AVInputFormat * const i[]);
967 
968 #endif /* AVFORMAT_INTERNAL_H */
AVStreamInternal::priv_pts
FFFrac * priv_pts
Definition: internal.h:218
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:387
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:3092
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:3297
AVStreamInternal::reorder
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:178
ff_ntp_time
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:4556
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:3281
out
FILE * out
Definition: movenc.c:54
AVFormatInternal::parse_queue_end
struct PacketList * parse_queue_end
Definition: internal.h:97
AVStreamInternal::avctx
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:195
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:2166
AVFormatInternal::avoid_negative_ts_use_pts
int avoid_negative_ts_use_pts
Definition: internal.h:140
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:5444
AVCodecTag::id
enum AVCodecID id
Definition: internal.h:46
MAX_STD_TIMEBASES
#define MAX_STD_TIMEBASES
Definition: internal.h:220
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:2204
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:4561
ff_free_stream
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:4295
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:349
AVStreamInternal::interleaver_chunk_size
int64_t interleaver_chunk_size
Definition: internal.h:258
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:1880
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:5466
AVStreamInternal::probe_packets
int probe_packets
Number of packets to buffer for codec probing.
Definition: internal.h:378
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:4583
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:79
AVStreamInternal::first_dts
int64_t first_dts
Timestamp corresponding to the last dts sync point.
Definition: internal.h:404
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:356
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:185
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:850
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:277
AVIndexEntry
Definition: avformat.h:767
AVStreamInternal::last_duration
int64_t last_duration
Definition: internal.h:241
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:2098
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:5517
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:50
ff_guess_image2_codec
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:106
AVFormatInternal
Definition: internal.h:67
AVFormatInternal::prefer_codec_framerate
int prefer_codec_framerate
Definition: internal.h:165
AVStreamParseType
AVStreamParseType
Definition: avformat.h:756
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:1054
AVFormatInternal::data_offset
int64_t data_offset
offset of the first packet
Definition: internal.h:83
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:4752
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2782
AVFormatInternal::raw_packet_buffer_remaining_size
int raw_packet_buffer_remaining_size
Definition: internal.h:120
AVFormatInternal::offset
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:127
AVStreamInternal::stream_identifier
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: internal.h:394
pkt
AVPacket * pkt
Definition: movenc.c:59
AVInputFormat
Definition: avformat.h:621
AVCodecTag
Definition: internal.h:45
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:312
width
#define width
AVFormatInternal::shortest_end
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:145
AVStreamInternal::display_aspect_ratio
AVRational display_aspect_ratio
display aspect ratio (0 if unknown)
Definition: internal.h:363
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVStreamInternal::codec_info_duration_fields
int64_t codec_info_duration_fields
Definition: internal.h:231
AVStreamInternal::pts_wrap_behavior
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: internal.h:329
ff_rename
int ff_rename(const char *url_src, const char *url_dst, void *logctx)
Wrap ffurl_move() and log if error happens.
Definition: avio.c:665
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:5461
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:372
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:334
AVStreamInternal::avctx_inited
int avctx_inited
1 if avctx has been initialized with the values from the codec parameters
Definition: internal.h:199
ff_hex_to_data
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4773
AVStreamInternal::duration_gcd
int64_t duration_gcd
Definition: internal.h:226
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:1097
avpriv_update_cur_dts
void avpriv_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:1853
AVStreamInternal::duration_count
int duration_count
Definition: internal.h:227
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:307
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:592
AVStreamInternal::codec_info_duration
int64_t codec_info_duration
Definition: internal.h:230
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::cur_dts
int64_t cur_dts
Definition: internal.h:405
AVStreamInternal::frame_delay_evidence
int frame_delay_evidence
Definition: internal.h:232
AVStreamInternal::skip_to_keyframe
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: internal.h:272
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:110
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:5396
AVStreamInternal::dts_misordered
uint8_t dts_misordered
Definition: internal.h:351
src
#define src
Definition: vp8dsp.c:255
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
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:155
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
AVStreamInternal::fps_first_dts_idx
int fps_first_dts_idx
Definition: internal.h:247
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:96
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVStreamInternal::rfps_duration_sum
int64_t rfps_duration_sum
Definition: internal.h:228
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3080
FFFrac::val
int64_t val
Definition: internal.h:63
AVStreamInternal::extract_extradata
struct AVStreamInternal::@259 extract_extradata
AVStreamInternal::fps_last_dts_idx
int fps_last_dts_idx
Definition: internal.h:249
AVStreamInternal::inited
int inited
Definition: internal.h:208
AVStreamInternal::request_probe
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: internal.h:267
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:4801
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:301
AVStreamInternal::is_intra_only
int is_intra_only
Definition: internal.h:216
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:239
ff_lock_avformat
int ff_lock_avformat(void)
Definition: utils.c:79
AVStreamInternal::nb_index_entries
int nb_index_entries
Definition: internal.h:255
AVStreamInternal::pts_wrap_reference
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: internal.h:317
AVFormatInternal::offset_timebase
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:132
AVFormatInternal::raw_packet_buffer
struct PacketList * raw_packet_buffer
Raw packets from the demuxer, prior to parsing and decoding.
Definition: internal.h:91
height
#define height
MAX_REORDER_DELAY
#define MAX_REORDER_DELAY
Definition: internal.h:336
AVStreamInternal::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:253
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:370
AVStreamInternal::pts_buffer
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: internal.h:344
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:5483
bprint.h
i
int i
Definition: input.c:407
AVStreamInternal
Definition: internal.h:173
AVOutputFormat
Definition: avformat.h:495
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:286
AVStreamInternal::index_entries_allocated_size
unsigned int index_entries_allocated_size
Definition: internal.h:256
AVStreamInternal::fps_first_dts
int64_t fps_first_dts
Those are used for average framerate estimation.
Definition: internal.h:246
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:4489
AVStreamInternal::parser
struct AVCodecParserContext * parser
Definition: internal.h:382
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:4928
avcodec.h
AVFormatInternal::nb_interleaved_streams
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:72
AVCodecParserContext
Definition: avcodec.h:2762
AVStreamInternal::probe_data
AVProbeData probe_data
Definition: internal.h:365
ff_rfps_calculate
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3357
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:5492
AVStream
Stream structure.
Definition: avformat.h:837
AVStreamInternal::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:381
AVStreamInternal::last_IP_duration
int last_IP_duration
Definition: internal.h:373
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:5608
AVStreamInternal::interleaver_chunk_duration
int64_t interleaver_chunk_duration
Definition: internal.h:259
AVStreamInternal::fps_last_dts
int64_t fps_last_dts
Definition: internal.h:248
AVCodecContext
main external API structure.
Definition: avcodec.h:384
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:4208
AVStreamInternal::pts_reorder_error_count
uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1]
Definition: internal.h:342
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:294
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:1867
ff_codec_get_tag
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3070
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:575
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:1948
AVFormatInternal::id3v2_meta
AVDictionary * id3v2_meta
ID3v2 tag useful for MP3 demuxing.
Definition: internal.h:160
CodecMime::str
char str[32]
Definition: internal.h:51
AVStreamInternal::dts_ordered
uint8_t dts_ordered
Definition: internal.h:350
AVFormatInternal::initialized
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:150
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5454
CodecMime::id
enum AVCodecID id
Definition: internal.h:52
FFFrac::num
int64_t num
Definition: internal.h:63
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:214
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:84
AVFormatInternal::inject_global_side_data
int inject_global_side_data
Definition: internal.h:138
AVStreamInternal::orig_codec_id
enum AVCodecID orig_codec_id
Definition: internal.h:201
AVFormatInternal::chapter_ids_monotonic
int chapter_ids_monotonic
Set if chapter ids are strictly monotonic.
Definition: internal.h:170
ff_mkdir_p
int ff_mkdir_p(const char *path)
Automatically create sub-directories.
Definition: utils.c:4718
AVStreamInternal::pts_reorder_error
int64_t pts_reorder_error[MAX_REORDER_DELAY+1]
Internal data to generate dts from pts.
Definition: internal.h:341
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:5190
AVFormatInternal::packet_buffer_end
struct PacketList * packet_buffer_end
Definition: internal.h:80
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:1818
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:4880
AVStreamInternal::bsf
AVBSFContext * bsf
Definition: internal.h:207
AV_WRITE_UNCODED_FRAME_QUERY
@ AV_WRITE_UNCODED_FRAME_QUERY
Query whether the feature is possible on this stream.
Definition: internal.h:856
AVStreamInternal::duration_error
double(* duration_error)[2][MAX_STD_TIMEBASES]
Definition: internal.h:229
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:225
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:115
FFFrac
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:62
AVFormatInternal::raw_packet_buffer_end
struct PacketList * raw_packet_buffer_end
Definition: internal.h:92
FFFrac::den
int64_t den
Definition: internal.h:63
AVCodecTag::tag
unsigned int tag
Definition: internal.h:47
avpriv_register_devices
void avpriv_register_devices(const AVOutputFormat *const o[], const AVInputFormat *const i[])
Definition: allformats.c:575
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:1991
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:4826
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:3263
AVStreamInternal::bitstream_checked
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:190