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 "libavcodec/avcodec.h"
27 #include "libavcodec/bsf.h"
28 
29 #include "avformat.h"
30 #include "os_support.h"
31 
32 #define MAX_URL_SIZE 4096
33 
34 /** size of probe buffer, for guessing file type from file contents */
35 #define PROBE_BUF_MIN 2048
36 #define PROBE_BUF_MAX (1 << 20)
37 
38 #ifdef DEBUG
39 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
40 #else
41 # define hex_dump_debug(class, buf, size) do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
42 #endif
43 
44 /**
45  * For an AVInputFormat with this flag set read_close() needs to be called
46  * by the caller upon read_header() failure.
47  */
48 #define FF_FMT_INIT_CLEANUP (1 << 0)
49 
50 typedef struct AVCodecTag {
51  enum AVCodecID id;
52  unsigned int tag;
53 } AVCodecTag;
54 
55 typedef struct CodecMime{
56  char str[32];
57  enum AVCodecID id;
58 } CodecMime;
59 
60 /*************************************************/
61 /* fractional numbers for exact pts handling */
62 
63 /**
64  * The exact value of the fractional number is: 'val + num / den'.
65  * num is assumed to be 0 <= num < den.
66  */
67 typedef struct FFFrac {
68  int64_t val, num, den;
69 } FFFrac;
70 
71 
72 typedef struct FFFormatContext {
73  /**
74  * The public context.
75  */
77 
78  /**
79  * Number of streams relevant for interleaving.
80  * Muxing only.
81  */
83 
84  /**
85  * This buffer is only needed when packets were already buffered but
86  * not decoded, for example to get the codec parameters in MPEG
87  * streams.
88  */
91 
92  /* av_seek_frame() support */
93  int64_t data_offset; /**< offset of the first packet */
94 
95  /**
96  * Raw packets from the demuxer, prior to parsing and decoding.
97  * This buffer is used for buffering packets until the codec can
98  * be identified, as parsing cannot be done without knowing the
99  * codec.
100  */
103  /**
104  * Packets split by the parser get queued here.
105  */
108  /**
109  * The generic code uses this as a temporary packet
110  * to parse packets; it may also be used for other means
111  * for short periods that are guaranteed not to overlap
112  * with calls to av_read_frame() (or ff_read_packet())
113  * or with each other.
114  * It may be used by demuxers as a replacement for
115  * stack packets (unless they call one of the aforementioned
116  * functions with their own AVFormatContext).
117  * Every user has to ensure that this packet is blank
118  * after using it.
119  */
121 
122  /**
123  * Used to hold temporary packets.
124  */
126  /**
127  * Remaining size available for raw_packet_buffer, in bytes.
128  */
129 #define RAW_PACKET_BUFFER_SIZE 2500000
131 
132  /**
133  * Offset to remap timestamps to be non-negative.
134  * Expressed in timebase units.
135  * @see AVStream.mux_ts_offset
136  */
137  int64_t offset;
138 
139  /**
140  * Timebase for the timestamp offset.
141  */
143 
144 #if FF_API_COMPUTE_PKT_FIELDS2
145  int missing_ts_warning;
146 #endif
147 
149 
151 
152  /**
153  * Timestamp of the end of the shortest stream.
154  */
155  int64_t shortest_end;
156 
157  /**
158  * Whether or not avformat_init_output has already been called
159  */
161 
162  /**
163  * Whether or not avformat_init_output fully initialized streams
164  */
166 
167  /**
168  * ID3v2 tag useful for MP3 demuxing
169  */
171 
172  /*
173  * Prefer the codec framerate for avg_frame_rate computation.
174  */
176 
177  /**
178  * Set if chapter ids are strictly monotonic.
179  */
182 
184 {
185  return (FFFormatContext*)s;
186 }
187 
188 typedef struct FFStream {
189  /**
190  * The public context.
191  */
193 
194  /**
195  * Set to 1 if the codec allows reordering, so pts can be different
196  * from dts.
197  */
198  int reorder;
199 
200  /**
201  * bitstream filter to run on stream
202  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
203  * - decoding: unused
204  */
206 
207  /**
208  * Whether or not check_bitstream should still be run on each packet
209  */
211 
212  /**
213  * The codec context used by avformat_find_stream_info, the parser, etc.
214  */
216  /**
217  * 1 if avctx has been initialized with the values from the codec parameters
218  */
220 
221  /* the context for extracting extradata in find_stream_info()
222  * inited=1/bsf=NULL signals that extracting is not possible (codec not
223  * supported) */
224  struct {
226  int inited;
228 
229  /**
230  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
231  */
233 
235 
237 
238 #define MAX_STD_TIMEBASES (30*12+30+3+6)
239  /**
240  * Stream information used internally by avformat_find_stream_info()
241  */
242  struct {
243  int64_t last_dts;
244  int64_t duration_gcd;
251 
252  /**
253  * 0 -> decoder has not been searched for yet.
254  * >0 -> decoder found
255  * <0 -> decoder with codec_id == -found_decoder has not been found
256  */
258 
259  int64_t last_duration;
260 
261  /**
262  * Those are used for average framerate estimation.
263  */
264  int64_t fps_first_dts;
266  int64_t fps_last_dts;
268 
269  } *info;
270 
271  AVIndexEntry *index_entries; /**< Only used if the format does not
272  support seeking natively. */
275 
278 
279  /**
280  * stream probing state
281  * -1 -> probing finished
282  * 0 -> no probing requested
283  * rest -> perform probing with request_probe being the minimum score to accept.
284  */
286  /**
287  * Indicates that everything up to the next keyframe
288  * should be discarded.
289  */
291 
292  /**
293  * Number of samples to skip at the start of the frame decoded from the next packet.
294  */
296 
297  /**
298  * If not 0, the number of samples that should be skipped from the start of
299  * the stream (the samples are removed from packets with pts==0, which also
300  * assumes negative timestamps do not happen).
301  * Intended for use with formats such as mp3 with ad-hoc gapless audio
302  * support.
303  */
305 
306  /**
307  * If not 0, the first audio sample that should be discarded from the stream.
308  * This is broken by design (needs global sample count), but can't be
309  * avoided for broken by design formats such as mp3 with ad-hoc gapless
310  * audio support.
311  */
313 
314  /**
315  * The sample after last sample that is intended to be discarded after
316  * first_discard_sample. Works on frame boundaries only. Used to prevent
317  * early EOF if the gapless info is broken (considered concatenated mp3s).
318  */
320 
321  /**
322  * Number of internally decoded frames, used internally in libavformat, do not access
323  * its lifetime differs from info which is why it is not in that structure.
324  */
326 
327  /**
328  * Timestamp offset added to timestamps before muxing
329  */
330  int64_t mux_ts_offset;
331 
332  /**
333  * Internal data to check for wrapping of the time stamp
334  */
336 
337  /**
338  * Options for behavior, when a wrap is detected.
339  *
340  * Defined by AV_PTS_WRAP_ values.
341  *
342  * If correction is enabled, there are two possibilities:
343  * If the first time stamp is near the wrap point, the wrap offset
344  * will be subtracted, which will create negative time stamps.
345  * Otherwise the offset will be added.
346  */
348 
349  /**
350  * Internal data to prevent doing update_initial_durations() twice
351  */
353 
354 #define MAX_REORDER_DELAY 16
355 
356  /**
357  * Internal data to generate dts from pts
358  */
361 
363 
364  /**
365  * Internal data to analyze DTS and detect faulty mpeg streams
366  */
368  uint8_t dts_ordered;
369  uint8_t dts_misordered;
370 
371  /**
372  * Internal data to inject global side data
373  */
375 
376  /**
377  * display aspect ratio (0 if unknown)
378  * - encoding: unused
379  * - decoding: Set by libavformat to calculate sample_aspect_ratio internally
380  */
382 
384 
385  /**
386  * last packet in packet_buffer for this stream when muxing.
387  */
389 
390  int64_t last_IP_pts;
392 
393  /**
394  * Number of packets to buffer for codec probing
395  */
397 
398  /* av_read_frame() support */
401 
402  /**
403  * Number of frames that have been demuxed during avformat_find_stream_info()
404  */
406 
407  /**
408  * Stream Identifier
409  * This is the MPEG-TS stream identifier +1
410  * 0 means unknown
411  */
413 
414  // Timestamp generation support:
415  /**
416  * Timestamp corresponding to the last dts sync point.
417  *
418  * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
419  * a DTS is received from the underlying container. Otherwise set to
420  * AV_NOPTS_VALUE by default.
421  */
422  int64_t first_dts;
423  int64_t cur_dts;
424 } FFStream;
425 
427 {
428  return (FFStream*)st;
429 }
430 
431 static av_always_inline const FFStream *cffstream(const AVStream *st)
432 {
433  return (FFStream*)st;
434 }
435 
437 
438 #ifdef __GNUC__
439 #define dynarray_add(tab, nb_ptr, elem)\
440 do {\
441  __typeof__(tab) _tab = (tab);\
442  __typeof__(elem) _elem = (elem);\
443  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
444  av_dynarray_add(_tab, nb_ptr, _elem);\
445 } while(0)
446 #else
447 #define dynarray_add(tab, nb_ptr, elem)\
448 do {\
449  av_dynarray_add((tab), nb_ptr, (elem));\
450 } while(0)
451 #endif
452 
453 #define RELATIVE_TS_BASE (INT64_MAX - (1LL << 48))
454 
455 static av_always_inline int is_relative(int64_t ts)
456 {
457  return ts > (RELATIVE_TS_BASE - (1LL << 48));
458 }
459 
460 /**
461  * Wrap a given time stamp, if there is an indication for an overflow
462  *
463  * @param st stream
464  * @param timestamp the time stamp to wrap
465  * @return resulting time stamp
466  */
467 int64_t ff_wrap_timestamp(const AVStream *st, int64_t timestamp);
468 
470 
471 /**
472  * Automatically create sub-directories
473  *
474  * @param path will create sub-directories by path
475  * @return 0, or < 0 on error
476  */
477 int ff_mkdir_p(const char *path);
478 
479 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
480 
481 /**
482  * Parse a string of hexadecimal strings. Any space between the hexadecimal
483  * digits is ignored.
484  *
485  * @param data if non-null, the parsed data is written to this pointer
486  * @param p the string to parse
487  * @return the number of bytes written (or to be written, if data is null)
488  */
489 int ff_hex_to_data(uint8_t *data, const char *p);
490 
491 /**
492  * Add packet to an AVFormatContext's packet_buffer list, determining its
493  * interleaved position using compare() function argument.
494  * @return 0 on success, < 0 on error. pkt will always be blank on return.
495  */
497  int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *));
498 
500 
501 #define NTP_OFFSET 2208988800ULL
502 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
503 
504 /** Get the current time since NTP epoch in microseconds. */
505 uint64_t ff_ntp_time(void);
506 
507 /**
508  * Get the NTP time stamp formatted as per the RFC-5905.
509  *
510  * @param ntp_time NTP time in micro seconds (since NTP epoch)
511  * @return the formatted NTP time stamp
512  */
513 uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us);
514 
515 /**
516  * Parse the NTP time in micro seconds (since NTP epoch).
517  *
518  * @param ntp_ts NTP time stamp formatted as per the RFC-5905.
519  * @return the time in micro seconds (since NTP epoch)
520  */
521 uint64_t ff_parse_ntp_time(uint64_t ntp_ts);
522 
523 /**
524  * Append the media-specific SDP fragment for the media stream c
525  * to the buffer buff.
526  *
527  * Note, the buffer needs to be initialized, since it is appended to
528  * existing content.
529  *
530  * @param buff the buffer to append the SDP fragment to
531  * @param size the size of the buff buffer
532  * @param st the AVStream of the media to describe
533  * @param idx the global stream index
534  * @param dest_addr the destination address of the media stream, may be NULL
535  * @param dest_type the destination address type, may be NULL
536  * @param port the destination port of the media stream, 0 if unknown
537  * @param ttl the time to live of the stream, 0 if not multicast
538  * @param fmt the AVFormatContext, which might contain options modifying
539  * the generated SDP
540  */
541 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
542  const char *dest_addr, const char *dest_type,
543  int port, int ttl, AVFormatContext *fmt);
544 
545 /**
546  * Write a packet to another muxer than the one the user originally
547  * intended. Useful when chaining muxers, where one muxer internally
548  * writes a received packet to another muxer.
549  *
550  * @param dst the muxer to write the packet to
551  * @param dst_stream the stream index within dst to write the packet to
552  * @param pkt the packet to be written. It will be returned blank when
553  * av_interleaved_write_frame() is used, unchanged otherwise.
554  * @param src the muxer the packet originally was intended for
555  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
556  * @return the value av_write_frame returned
557  */
558 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
560 
561 /**
562  * Read a whole line of text from AVIOContext. Stop reading after reaching
563  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
564  * and may be truncated if the buffer is too small.
565  *
566  * @param s the read-only AVIOContext
567  * @param buf buffer to store the read line
568  * @param maxlen size of the buffer
569  * @return the length of the string written in the buffer, not including the
570  * final \\0
571  */
572 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
573 
574 /**
575  * Same as ff_get_line but strip the white-space characters in the text tail
576  *
577  * @param s the read-only AVIOContext
578  * @param buf buffer to store the read line
579  * @param maxlen size of the buffer
580  * @return the length of the string written in the buffer
581  */
582 int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen);
583 
584 #define SPACE_CHARS " \t\r\n"
585 
586 /**
587  * Callback function type for ff_parse_key_value.
588  *
589  * @param key a pointer to the key
590  * @param key_len the number of bytes that belong to the key, including the '='
591  * char
592  * @param dest return the destination pointer for the value in *dest, may
593  * be null to ignore the value
594  * @param dest_len the length of the *dest buffer
595  */
596 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
597  int key_len, char **dest, int *dest_len);
598 /**
599  * Parse a string with comma-separated key=value pairs. The value strings
600  * may be quoted and may contain escaped characters within quoted strings.
601  *
602  * @param str the string to parse
603  * @param callback_get_buf function that returns where to store the
604  * unescaped value string.
605  * @param context the opaque context pointer to pass to callback_get_buf
606  */
607 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
608  void *context);
609 
610 /**
611  * Find stream index based on format-specific stream ID
612  * @return stream index, or < 0 on error
613  */
615 
616 /**
617  * Internal version of av_index_search_timestamp
618  */
619 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
620  int64_t wanted_timestamp, int flags);
621 
622 /**
623  * Internal version of av_add_index_entry
624  */
625 int ff_add_index_entry(AVIndexEntry **index_entries,
626  int *nb_index_entries,
627  unsigned int *index_entries_allocated_size,
628  int64_t pos, int64_t timestamp, int size, int distance, int flags);
629 
630 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
631 
632 /**
633  * Add a new chapter.
634  *
635  * @param s media file handle
636  * @param id unique ID for this chapter
637  * @param start chapter start time in time_base units
638  * @param end chapter end time in time_base units
639  * @param title chapter title
640  *
641  * @return AVChapter or NULL on error
642  */
643 AVChapter *avpriv_new_chapter(AVFormatContext *s, int64_t id, AVRational time_base,
644  int64_t start, int64_t end, const char *title);
645 
646 /**
647  * Ensure the index uses less memory than the maximum specified in
648  * AVFormatContext.max_index_size by discarding entries if it grows
649  * too large.
650  */
651 void ff_reduce_index(AVFormatContext *s, int stream_index);
652 
653 enum AVCodecID ff_guess_image2_codec(const char *filename);
654 
656  enum AVCodecID codec_id);
657 /**
658  * Perform a binary search using av_index_search_timestamp() and
659  * AVInputFormat.read_timestamp().
660  *
661  * @param target_ts target timestamp in the time base of the given stream
662  * @param stream_index stream number
663  */
664 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
665  int64_t target_ts, int flags);
666 
667 /**
668  * Update cur_dts of all streams based on the given timestamp and AVStream.
669  *
670  * Stream ref_st unchanged, others set cur_dts in their native time base.
671  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
672  * @param timestamp new dts expressed in time_base of param ref_st
673  * @param ref_st reference stream giving time_base of param timestamp
674  */
675 void avpriv_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
676 
677 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
678  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
679 
680 /**
681  * Perform a binary search using read_timestamp().
682  *
683  * @param target_ts target timestamp in the time base of the given stream
684  * @param stream_index stream number
685  */
686 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
687  int64_t target_ts, int64_t pos_min,
688  int64_t pos_max, int64_t pos_limit,
689  int64_t ts_min, int64_t ts_max,
690  int flags, int64_t *ts_ret,
691  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
692 
693 /**
694  * Set the time base and wrapping info for a given stream. This will be used
695  * to interpret the stream's timestamps. If the new time base is invalid
696  * (numerator or denominator are non-positive), it leaves the stream
697  * unchanged.
698  *
699  * @param st stream
700  * @param pts_wrap_bits number of bits effectively used by the pts
701  * (used for wrap control)
702  * @param pts_num time base numerator
703  * @param pts_den time base denominator
704  */
705 void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits,
706  unsigned int pts_num, unsigned int pts_den);
707 
708 /**
709  * Add side data to a packet for changing parameters to the given values.
710  * Parameters set to 0 aren't included in the change.
711  */
713  uint64_t channel_layout, int32_t sample_rate,
715 
716 /**
717  * Set the timebase for each stream from the corresponding codec timebase and
718  * print it.
719  */
721 
722 /**
723  * Read a transport packet from a media file.
724  *
725  * @param s media file handle
726  * @param pkt is filled
727  * @return 0 if OK, AVERROR_xxx on error
728  */
730 
731 /**
732  * Add an attached pic to an AVStream.
733  *
734  * @param st if set, the stream to add the attached pic to;
735  * if unset, a new stream will be added to s.
736  * @param pb AVIOContext to read data from if buf is unset.
737  * @param buf if set, it contains the data and size information to be used
738  * for the attached pic; if unset, data is read from pb.
739  * @param size the size of the data to read if buf is unset.
740  *
741  * @return 0 on success, < 0 on error. On error, this function removes
742  * the stream it has added (if any).
743  */
745  AVBufferRef **buf, int size);
746 
747 /**
748  * Interleave an AVPacket per dts so it can be muxed.
749  *
750  * @param s an AVFormatContext for output. pkt resp. out will be added to
751  * resp. taken from its packet buffer.
752  * @param out the interleaved packet will be output here
753  * @param pkt the input packet; will be blank on return if not NULL
754  * @param flush 1 if no further packets are available as input and all
755  * remaining packets should be output
756  * @return 1 if a packet was output, 0 if no packet could be output
757  * (in which case out may be uninitialized), < 0 if an error occurred
758  */
760  AVPacket *pkt, int flush);
761 
763 
764 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
765 
766 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
767 
768 int ff_is_intra_only(enum AVCodecID id);
769 
770 /**
771  * Select a PCM codec based on the given parameters.
772  *
773  * @param bps bits-per-sample
774  * @param flt floating-point
775  * @param be big-endian
776  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
777  * e.g. the 1st bit indicates if 8-bit should be signed or
778  * unsigned, the 2nd bit indicates if 16-bit should be signed or
779  * unsigned, etc... This is useful for formats such as WAVE where
780  * only 8-bit is unsigned and all other bit depths are signed.
781  * @return a PCM codec id or AV_CODEC_ID_NONE
782  */
783 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
784 
785 /**
786  * Chooses a timebase for muxing the specified stream.
787  *
788  * The chosen timebase allows sample accurate timestamps based
789  * on the framerate or sample rate for audio streams. It also is
790  * at least as precise as 1/min_precision would be.
791  */
792 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
793 
794 /**
795  * Chooses a timebase for muxing the specified stream.
796  */
798 
799 /**
800  * Generate standard extradata for AVC-Intra based on width/height and field
801  * order.
802  */
804 
805 /**
806  * Add a bitstream filter to a stream.
807  *
808  * @param st output stream to add a filter to
809  * @param name the name of the filter to add
810  * @param args filter-specific argument string
811  * @return >0 on success;
812  * AVERROR code on failure
813  */
814 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
815 
816 /**
817  * Copy encoding parameters from source to destination stream
818  *
819  * @param dst pointer to destination AVStream
820  * @param src pointer to source AVStream
821  * @return >=0 on success, AVERROR code on error
822  */
824 
825 /**
826  * Wrap ffurl_move() and log if error happens.
827  *
828  * @param url_src source path
829  * @param url_dst destination path
830  * @return 0 or AVERROR on failure
831  */
832 int ff_rename(const char *url_src, const char *url_dst, void *logctx);
833 
834 /**
835  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
836  * which is always set to 0.
837  *
838  * Previously allocated extradata in par will be freed.
839  *
840  * @param size size of extradata
841  * @return 0 if OK, AVERROR_xxx on error
842  */
844 
845 /**
846  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
847  * which is always set to 0 and fill it from pb.
848  *
849  * @param size size of extradata
850  * @return >= 0 if OK, AVERROR_xxx on error
851  */
853 
854 /**
855  * add frame for rfps calculation.
856  *
857  * @param dts timestamp of the i-th frame
858  * @return 0 if OK, AVERROR_xxx on error
859  */
860 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
861 
863 
864 /**
865  * Flags for AVFormatContext.write_uncoded_frame()
866  */
868 
869  /**
870  * Query whether the feature is possible on this stream.
871  * The frame argument is ignored.
872  */
874 
875 };
876 
877 /**
878  * Copies the whilelists from one context to the other
879  */
881 
882 /**
883  * Returned by demuxers to indicate that data was consumed but discarded
884  * (ignored streams or junk data). The framework will re-call the demuxer.
885  */
886 #define FFERROR_REDO FFERRTAG('R','E','D','O')
887 
888 /**
889  * Utility function to open IO stream of output format.
890  *
891  * @param s AVFormatContext
892  * @param url URL or file name to open for writing
893  * @options optional options which will be passed to io_open callback
894  * @return >=0 on success, negative AVERROR in case of failure
895  */
897 
898 /*
899  * A wrapper around AVFormatContext.io_close that should be used
900  * instead of calling the pointer directly.
901  */
903 
904 /**
905  * Utility function to check if the file uses http or https protocol
906  *
907  * @param s AVFormatContext
908  * @param filename URL or file name to open for writing
909  */
910 int ff_is_http_proto(char *filename);
911 
912 /**
913  * Parse creation_time in AVFormatContext metadata if exists and warn if the
914  * parsing fails.
915  *
916  * @param s AVFormatContext
917  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
918  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
919  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
920  */
921 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
922 
923 /**
924  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
925  * timestamp string.
926  *
927  * @param s AVFormatContext
928  * @return <0 on error
929  */
931 
932 #define CONTAINS_PAL 2
933 /**
934  * Reshuffles the lines to use the user specified stride.
935  *
936  * @param ppkt input and output packet
937  * @return negative error code or
938  * 0 if no new packet was allocated
939  * non-zero if a new packet was allocated and ppkt has to be freed
940  * CONTAINS_PAL if in addition to a new packet the old contained a palette
941  */
942 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
943 
944 /**
945  * Retrieves the palette from a packet, either from side data, or
946  * appended to the video data in the packet itself (raw video only).
947  * It is commonly used after a call to ff_reshuffle_raw_rgb().
948  *
949  * Use 0 for the ret parameter to check for side data only.
950  *
951  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
952  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
953  * @param palette pointer to palette buffer
954  * @return negative error code or
955  * 1 if the packet has a palette, else 0
956  */
957 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
958 
959 struct AVBPrint;
960 /**
961  * Finalize buf into extradata and set its size appropriately.
962  */
963 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
964 
965 /**
966  * Find the next packet in the interleaving queue for the given stream.
967  *
968  * @return a pointer to a packet if one was found, NULL otherwise.
969  */
970 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream);
971 
972 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset);
973 
974 int ff_lock_avformat(void);
975 int ff_unlock_avformat(void);
976 
977 /**
978  * Set AVFormatContext url field to the provided pointer. The pointer must
979  * point to a valid string. The existing url field is freed if necessary. Also
980  * set the legacy filename field to the same string which was provided in url.
981  */
982 void ff_format_set_url(AVFormatContext *s, char *url);
983 
984 void avpriv_register_devices(const AVOutputFormat * const o[], const AVInputFormat * const i[]);
985 
986 #endif /* AVFORMAT_INTERNAL_H */
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
AVCodec
AVCodec.
Definition: codec.h:197
FFStream::skip_samples
int skip_samples
Number of samples to skip at the start of the frame decoded from the next packet.
Definition: internal.h:295
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:368
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: demux.c:2155
ff_find_decoder
const AVCodec * ff_find_decoder(AVFormatContext *s, const AVStream *st, enum AVCodecID codec_id)
Definition: utils.c:134
FFStream::inject_global_side_data
int inject_global_side_data
Internal data to inject global side data.
Definition: internal.h:374
ff_ntp_time
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:902
FFFormatContext::prefer_codec_framerate
int prefer_codec_framerate
Definition: internal.h:175
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:469
out
FILE * out
Definition: movenc.c:54
FFStream::first_dts
int64_t first_dts
Timestamp corresponding to the last dts sync point.
Definition: internal.h:422
FFStream::rfps_duration_sum
int64_t rfps_duration_sum
Definition: internal.h:246
FFStream::duration_gcd
int64_t duration_gcd
Definition: internal.h:244
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
FFStream::last_IP_pts
int64_t last_IP_pts
Definition: internal.h:390
ffformatcontext
static av_always_inline FFFormatContext * ffformatcontext(AVFormatContext *s)
Definition: internal.h:183
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: seek.c:352
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:1788
FFStream::codec_info_duration_fields
int64_t codec_info_duration_fields
Definition: internal.h:249
FFFormatContext::raw_packet_buffer
struct PacketList * raw_packet_buffer
Raw packets from the demuxer, prior to parsing and decoding.
Definition: internal.h:101
AVCodecTag::id
enum AVCodecID id
Definition: internal.h:51
MAX_STD_TIMEBASES
#define MAX_STD_TIMEBASES
Definition: internal.h:238
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: seek.c:390
FFStream::codec_info_duration
int64_t codec_info_duration
Definition: internal.h:248
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:907
ff_free_stream
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:671
FFStream::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:312
FFStream::interleaver_chunk_size
int64_t interleaver_chunk_size
Definition: internal.h:276
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: seek.c:59
PacketList
Definition: packet_internal.h:26
data
const char data[16]
Definition: mxf.c:143
FFFormatContext::initialized
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:160
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:1810
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:929
FFStream::fps_last_dts
int64_t fps_last_dts
Definition: internal.h:266
FFStream::bsfc
AVBSFContext * bsfc
bitstream filter to run on stream
Definition: internal.h:205
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:798
cffstream
static const av_always_inline FFStream * cffstream(const AVStream *st)
Definition: internal.h:431
FFStream::extract_extradata
struct FFStream::@256 extract_extradata
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
FFStream::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:367
AVWriteUncodedFrameFlags
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:867
os_support.h
sample_rate
sample_rate
Definition: ffmpeg_filter.c:156
AVBSFContext
The bitstream filter state.
Definition: bsf.h:47
AVIndexEntry
Definition: avformat.h:777
FFStream::bsf
AVBSFContext * bsf
Definition: internal.h:225
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: seek.c:282
FFFormatContext::shortest_end
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:155
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:1860
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:81
ff_is_intra_only
int ff_is_intra_only(enum AVCodecID id)
Definition: utils.c:287
CodecMime
Definition: internal.h:55
FFStream::is_intra_only
int is_intra_only
Definition: internal.h:234
ff_guess_image2_codec
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:106
FFStream::dts_ordered
uint8_t dts_ordered
Definition: internal.h:368
FFStream::last_IP_duration
int last_IP_duration
Definition: internal.h:391
RELATIVE_TS_BASE
#define RELATIVE_TS_BASE
Definition: internal.h:453
bsf.h
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:426
FFStream::inited
int inited
Definition: internal.h:226
AVStreamParseType
AVStreamParseType
Definition: avformat.h:766
FFStream::index_entries_allocated_size
unsigned int index_entries_allocated_size
Definition: internal.h:274
ff_get_line
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:781
AVChapter
Definition: avformat.h:1056
ff_read_packet
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: demux.c:524
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:1098
AVCodecParserContext::dts
int64_t dts
Definition: avcodec.h:2790
FFStream::priv_pts
FFFrac * priv_pts
Definition: internal.h:236
pkt
AVPacket * pkt
Definition: movenc.c:59
AVInputFormat
Definition: avformat.h:626
AVCodecTag
Definition: internal.h:50
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:1306
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:24
FFStream::duration_count
int duration_count
Definition: internal.h:245
width
#define width
FFStream::duration_error
double(* duration_error)[2][MAX_STD_TIMEBASES]
Definition: internal.h:247
s
#define s(width, name)
Definition: cbs_vp9.c:257
FFFormatContext::raw_packet_buffer_remaining_size
int raw_packet_buffer_remaining_size
Definition: internal.h:130
FFStream::frame_delay_evidence
int frame_delay_evidence
Definition: internal.h:250
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:99
FFStream::info
struct FFStream::@257 * info
Stream information used internally by avformat_find_stream_info()
FFStream::last_in_packet_buffer
struct PacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: internal.h:388
FFStream::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:325
FFFormatContext::raw_packet_buffer_end
struct PacketList * raw_packet_buffer_end
Definition: internal.h:102
FFFormatContext::data_offset
int64_t data_offset
offset of the first packet
Definition: internal.h:93
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:1805
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:795
FFStream::codec_info_nb_frames
int codec_info_nb_frames
Number of frames that have been demuxed during avformat_find_stream_info()
Definition: internal.h:405
channels
channels
Definition: aptx.h:33
FFStream::pts_reorder_error_count
uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1]
Definition: internal.h:360
FFStream::display_aspect_ratio
AVRational display_aspect_ratio
display aspect ratio (0 if unknown)
Definition: internal.h:381
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
key
const char * key
Definition: hwcontext_opencl.c:168
FFStream::pts_reorder_error
int64_t pts_reorder_error[MAX_REORDER_DELAY+1]
Internal data to generate dts from pts.
Definition: internal.h:359
ff_hex_to_data
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:1118
FFFormatContext
Definition: internal.h:72
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:399
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
FFStream::pub
AVStream pub
The public context.
Definition: internal.h:192
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: seek.c:32
FFStream::bitstream_checked
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:210
flush
static void flush(AVCodecContext *avctx)
Definition: aacdec_template.c:593
FFStream::avctx_inited
int avctx_inited
1 if avctx has been initialized with the values from the codec parameters
Definition: internal.h:219
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:91
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_get_muxer_ts_offset
int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)
Definition: mux.c:1021
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:1739
src
#define src
Definition: vp8dsp.c:255
FFStream::nb_index_entries
int nb_index_entries
Definition: internal.h:273
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
FFStream::fps_last_dts_idx
int fps_last_dts_idx
Definition: internal.h:267
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
FFStream::interleaver_chunk_duration
int64_t interleaver_chunk_duration
Definition: internal.h:277
FFFormatContext::inject_global_side_data
int inject_global_side_data
Definition: internal.h:148
AVCodecID
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:47
FFStream::fps_first_dts
int64_t fps_first_dts
Those are used for average framerate estimation.
Definition: internal.h:264
FFFormatContext::id3v2_meta
AVDictionary * id3v2_meta
ID3v2 tag useful for MP3 demuxing.
Definition: internal.h:170
FFFormatContext::parse_queue
struct PacketList * parse_queue
Packets split by the parser get queued here.
Definition: internal.h:106
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
FFFormatContext::packet_buffer_end
struct PacketList * packet_buffer_end
Definition: internal.h:90
options
const OptionDef options[]
FFStream::found_decoder
int found_decoder
0 -> decoder has not been searched for yet.
Definition: internal.h:257
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
FFFormatContext::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:120
ff_codec_get_id
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:357
FFFrac::val
int64_t val
Definition: internal.h:68
FFStream
Definition: internal.h:188
FFStream::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:319
bps
unsigned bps
Definition: movenc.c:1598
ff_copy_whiteblacklists
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:114
size
int size
Definition: twinvq_data.h:10344
ff_lock_avformat
int ff_lock_avformat(void)
Definition: utils.c:76
FFStream::dts_misordered
uint8_t dts_misordered
Definition: internal.h:369
height
#define height
MAX_REORDER_DELAY
#define MAX_REORDER_DELAY
Definition: internal.h:354
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
FFStream::pts_wrap_behavior
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: internal.h:347
FFStream::update_initial_durations_done
int update_initial_durations_done
Internal data to prevent doing update_initial_durations() twice.
Definition: internal.h:352
FFStream::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:304
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:1037
FFStream::probe_packets
int probe_packets
Number of packets to buffer for codec probing.
Definition: internal.h:396
ff_wrap_timestamp
int64_t ff_wrap_timestamp(const AVStream *st, int64_t timestamp)
Wrap a given time stamp, if there is an indication for an overflow.
Definition: demux.c:63
FFStream::probe_data
AVProbeData probe_data
Definition: internal.h:383
AVChromaLocation
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:595
FFStream::skip_to_keyframe
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: internal.h:290
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:1827
i
int i
Definition: input.c:406
FFStream::mux_ts_offset
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing.
Definition: internal.h:330
AVOutputFormat
Definition: avformat.h:495
FFFormatContext::parse_queue_end
struct PacketList * parse_queue_end
Definition: internal.h:107
ff_flush_packet_queue
void ff_flush_packet_queue(AVFormatContext *s)
Definition: utils.c:299
FFStream::reorder
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:198
FFStream::fps_first_dts_idx
int fps_first_dts_idx
Definition: internal.h:265
av_always_inline
#define av_always_inline
Definition: attributes.h:49
FFStream::pts_buffer
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: internal.h:362
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:835
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:1273
avcodec.h
AVCodecParserContext
Definition: avcodec.h:2770
ff_rfps_calculate
void ff_rfps_calculate(AVFormatContext *ic)
Definition: demux.c:2215
tag
uint32_t tag
Definition: movenc.c:1597
FFStream::last_duration
int64_t last_duration
Definition: internal.h:259
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:1836
AVStream
Stream structure.
Definition: avformat.h:845
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:1947
FFFormatContext::chapter_ids_monotonic
int chapter_ids_monotonic
Set if chapter ids are strictly monotonic.
Definition: internal.h:180
FFFormatContext::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:89
FFFormatContext::offset_timebase
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:142
AVCodecContext
main external API structure.
Definition: avcodec.h:379
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:586
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: seek.c:45
FFStream::avctx
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:215
ff_codec_get_tag
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:347
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:596
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: seek.c:127
FFFormatContext::offset
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:137
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1146
CodecMime::str
char str[32]
Definition: internal.h:56
FFStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:271
ff_format_io_close
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:1798
CodecMime::id
enum AVCodecID id
Definition: internal.h:57
FFFormatContext::streams_initialized
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:165
FFFrac::num
int64_t num
Definition: internal.h:68
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
FFFormatContext::pkt
AVPacket * pkt
Used to hold temporary packets.
Definition: internal.h:125
ff_mkdir_p
int ff_mkdir_p(const char *path)
Automatically create sub-directories.
Definition: utils.c:1064
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:1536
FFStream::request_probe
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: internal.h:285
AVPacket
This structure stores compressed data.
Definition: packet.h:350
ff_read_frame_flush
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: seek.c:714
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:1226
AV_WRITE_UNCODED_FRAME_QUERY
@ AV_WRITE_UNCODED_FRAME_QUERY
Query whether the feature is possible on this stream.
Definition: internal.h:873
FFStream::cur_dts
int64_t cur_dts
Definition: internal.h:423
int32_t
int32_t
Definition: audioconvert.c:56
convert_header.str
string str
Definition: convert_header.py:20
FFStream::stream_identifier
int stream_identifier
Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
Definition: internal.h:412
distance
static float distance(float x, float y, int band)
Definition: nellymoserenc.c:233
FFStream::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:232
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
FFStream::last_dts
int64_t last_dts
Definition: internal.h:243
FFStream::parser
struct AVCodecParserContext * parser
Definition: internal.h:400
read_timestamp
static int64_t read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))
Definition: seek.c:273
FFFrac
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:67
FFFrac::den
int64_t den
Definition: internal.h:68
AVCodecTag::tag
unsigned int tag
Definition: internal.h:52
FFFormatContext::pub
AVFormatContext pub
The public context.
Definition: internal.h:76
avpriv_register_devices
void avpriv_register_devices(const AVOutputFormat *const o[], const AVInputFormat *const i[])
Definition: allformats.c:576
FFStream::pts_wrap_reference
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: internal.h:335
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:899
ff_configure_buffers_for_index
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: seek.c:170
FFFormatContext::nb_interleaved_streams
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:82
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:250
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:1172
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:451
is_relative
static av_always_inline int is_relative(int64_t ts)
Definition: internal.h:455
FFFormatContext::avoid_negative_ts_use_pts
int avoid_negative_ts_use_pts
Definition: internal.h:150