FFmpeg  4.4.5
internal.h
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1 /*
2  * copyright (c) 2001 Fabrice Bellard
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFORMAT_INTERNAL_H
22 #define AVFORMAT_INTERNAL_H
23 
24 #include <stdint.h>
25 
26 #include "libavutil/bprint.h"
27 #include "avformat.h"
28 #include "os_support.h"
29 
30 #define MAX_URL_SIZE 4096
31 
32 /** size of probe buffer, for guessing file type from file contents */
33 #define PROBE_BUF_MIN 2048
34 #define PROBE_BUF_MAX (1 << 20)
35 
36 #ifdef DEBUG
37 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
38 #else
39 # define hex_dump_debug(class, buf, size) do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
40 #endif
41 
42 typedef struct AVCodecTag {
43  enum AVCodecID id;
44  unsigned int tag;
45 } AVCodecTag;
46 
47 typedef struct CodecMime{
48  char str[32];
49  enum AVCodecID id;
50 } CodecMime;
51 
52 /*************************************************/
53 /* fractional numbers for exact pts handling */
54 
55 /**
56  * The exact value of the fractional number is: 'val + num / den'.
57  * num is assumed to be 0 <= num < den.
58  */
59 typedef struct FFFrac {
61 } FFFrac;
62 
63 
65  /**
66  * Number of streams relevant for interleaving.
67  * Muxing only.
68  */
70 
71  /**
72  * This buffer is only needed when packets were already buffered but
73  * not decoded, for example to get the codec parameters in MPEG
74  * streams.
75  */
78 
79  /* av_seek_frame() support */
80  int64_t data_offset; /**< offset of the first packet */
81 
82  /**
83  * Raw packets from the demuxer, prior to parsing and decoding.
84  * This buffer is used for buffering packets until the codec can
85  * be identified, as parsing cannot be done without knowing the
86  * codec.
87  */
90  /**
91  * Packets split by the parser get queued here.
92  */
96 
97  /**
98  * Used to hold temporary packets.
99  */
101  /**
102  * Remaining size available for raw_packet_buffer, in bytes.
103  */
104 #define RAW_PACKET_BUFFER_SIZE 2500000
106 
107  /**
108  * Offset to remap timestamps to be non-negative.
109  * Expressed in timebase units.
110  * @see AVStream.mux_ts_offset
111  */
113 
114  /**
115  * Timebase for the timestamp offset.
116  */
118 
119 #if FF_API_COMPUTE_PKT_FIELDS2
121 #endif
122 
124 
126 
127  /**
128  * Timestamp of the end of the shortest stream.
129  */
131 
132  /**
133  * Whether or not avformat_init_output has already been called
134  */
136 
137  /**
138  * Whether or not avformat_init_output fully initialized streams
139  */
141 
142  /**
143  * ID3v2 tag useful for MP3 demuxing
144  */
146 
147  /*
148  * Prefer the codec framerate for avg_frame_rate computation.
149  */
151 
152  /**
153  * Set if chapter ids are strictly monotonic.
154  */
156 };
157 
159  /**
160  * Set to 1 if the codec allows reordering, so pts can be different
161  * from dts.
162  */
163  int reorder;
164 
165  /**
166  * bitstream filter to run on stream
167  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
168  * - decoding: unused
169  */
171 
172  /**
173  * Whether or not check_bitstream should still be run on each packet
174  */
176 
177  /**
178  * The codec context used by avformat_find_stream_info, the parser, etc.
179  */
181  /**
182  * 1 if avctx has been initialized with the values from the codec parameters
183  */
185 
187 
188  /* the context for extracting extradata in find_stream_info()
189  * inited=1/bsf=NULL signals that extracting is not possible (codec not
190  * supported) */
191  struct {
194  int inited;
196 
197  /**
198  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
199  */
201 
203 
205 
206 #define MAX_STD_TIMEBASES (30*12+30+3+6)
207  /**
208  * Stream information used internally by avformat_find_stream_info()
209  */
210  struct {
219 
220  /**
221  * 0 -> decoder has not been searched for yet.
222  * >0 -> decoder found
223  * <0 -> decoder with codec_id == -found_decoder has not been found
224  */
226 
228 
229  /**
230  * Those are used for average framerate estimation.
231  */
236 
237  } *info;
238 
241 
242  /**
243  * stream probing state
244  * -1 -> probing finished
245  * 0 -> no probing requested
246  * rest -> perform probing with request_probe being the minimum score to accept.
247  */
249  /**
250  * Indicates that everything up to the next keyframe
251  * should be discarded.
252  */
254 
255  /**
256  * Number of samples to skip at the start of the frame decoded from the next packet.
257  */
259 
260  /**
261  * If not 0, the number of samples that should be skipped from the start of
262  * the stream (the samples are removed from packets with pts==0, which also
263  * assumes negative timestamps do not happen).
264  * Intended for use with formats such as mp3 with ad-hoc gapless audio
265  * support.
266  */
268 
269  /**
270  * If not 0, the first audio sample that should be discarded from the stream.
271  * This is broken by design (needs global sample count), but can't be
272  * avoided for broken by design formats such as mp3 with ad-hoc gapless
273  * audio support.
274  */
276 
277  /**
278  * The sample after last sample that is intended to be discarded after
279  * first_discard_sample. Works on frame boundaries only. Used to prevent
280  * early EOF if the gapless info is broken (considered concatenated mp3s).
281  */
283 
284  /**
285  * Number of internally decoded frames, used internally in libavformat, do not access
286  * its lifetime differs from info which is why it is not in that structure.
287  */
289 
290  /**
291  * Timestamp offset added to timestamps before muxing
292  */
294 
295  /**
296  * Internal data to check for wrapping of the time stamp
297  */
299 
300  /**
301  * Options for behavior, when a wrap is detected.
302  *
303  * Defined by AV_PTS_WRAP_ values.
304  *
305  * If correction is enabled, there are two possibilities:
306  * If the first time stamp is near the wrap point, the wrap offset
307  * will be subtracted, which will create negative time stamps.
308  * Otherwise the offset will be added.
309  */
311 
312  /**
313  * Internal data to prevent doing update_initial_durations() twice
314  */
316 
317 #define MAX_REORDER_DELAY 16
318 
319  /**
320  * Internal data to generate dts from pts
321  */
324 
326 
327  /**
328  * Internal data to analyze DTS and detect faulty mpeg streams
329  */
333 
334  /**
335  * Internal data to inject global side data
336  */
338 
339  /**
340  * display aspect ratio (0 if unknown)
341  * - encoding: unused
342  * - decoding: Set by libavformat to calculate sample_aspect_ratio internally
343  */
345 
347 
348  /**
349  * last packet in packet_buffer for this stream when muxing.
350  */
352 };
353 
354 #ifdef __GNUC__
355 #define dynarray_add(tab, nb_ptr, elem)\
356 do {\
357  __typeof__(tab) _tab = (tab);\
358  __typeof__(elem) _elem = (elem);\
359  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
360  av_dynarray_add(_tab, nb_ptr, _elem);\
361 } while(0)
362 #else
363 #define dynarray_add(tab, nb_ptr, elem)\
364 do {\
365  av_dynarray_add((tab), nb_ptr, (elem));\
366 } while(0)
367 #endif
368 
369 /**
370  * Automatically create sub-directories
371  *
372  * @param path will create sub-directories by path
373  * @return 0, or < 0 on error
374  */
375 int ff_mkdir_p(const char *path);
376 
377 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
378 
379 /**
380  * Parse a string of hexadecimal strings. Any space between the hexadecimal
381  * digits is ignored.
382  *
383  * @param data if non-null, the parsed data is written to this pointer
384  * @param p the string to parse
385  * @return the number of bytes written (or to be written, if data is null)
386  */
387 int ff_hex_to_data(uint8_t *data, const char *p);
388 
389 /**
390  * Add packet to an AVFormatContext's packet_buffer list, determining its
391  * interleaved position using compare() function argument.
392  * @return 0 on success, < 0 on error. pkt will always be blank on return.
393  */
395  int (*compare)(AVFormatContext *, const AVPacket *, const AVPacket *));
396 
398 
399 #define NTP_OFFSET 2208988800ULL
400 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
401 
402 /** Get the current time since NTP epoch in microseconds. */
403 uint64_t ff_ntp_time(void);
404 
405 /**
406  * Get the NTP time stamp formatted as per the RFC-5905.
407  *
408  * @param ntp_time NTP time in micro seconds (since NTP epoch)
409  * @return the formatted NTP time stamp
410  */
411 uint64_t ff_get_formatted_ntp_time(uint64_t ntp_time_us);
412 
413 /**
414  * Append the media-specific SDP fragment for the media stream c
415  * to the buffer buff.
416  *
417  * Note, the buffer needs to be initialized, since it is appended to
418  * existing content.
419  *
420  * @param buff the buffer to append the SDP fragment to
421  * @param size the size of the buff buffer
422  * @param st the AVStream of the media to describe
423  * @param idx the global stream index
424  * @param dest_addr the destination address of the media stream, may be NULL
425  * @param dest_type the destination address type, may be NULL
426  * @param port the destination port of the media stream, 0 if unknown
427  * @param ttl the time to live of the stream, 0 if not multicast
428  * @param fmt the AVFormatContext, which might contain options modifying
429  * the generated SDP
430  */
431 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
432  const char *dest_addr, const char *dest_type,
433  int port, int ttl, AVFormatContext *fmt);
434 
435 /**
436  * Write a packet to another muxer than the one the user originally
437  * intended. Useful when chaining muxers, where one muxer internally
438  * writes a received packet to another muxer.
439  *
440  * @param dst the muxer to write the packet to
441  * @param dst_stream the stream index within dst to write the packet to
442  * @param pkt the packet to be written
443  * @param src the muxer the packet originally was intended for
444  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
445  * @return the value av_write_frame returned
446  */
447 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
449 
450 /**
451  * Read a whole line of text from AVIOContext. Stop reading after reaching
452  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
453  * and may be truncated if the buffer is too small.
454  *
455  * @param s the read-only AVIOContext
456  * @param buf buffer to store the read line
457  * @param maxlen size of the buffer
458  * @return the length of the string written in the buffer, not including the
459  * final \\0
460  */
461 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
462 
463 /**
464  * Same as ff_get_line but strip the white-space characters in the text tail
465  *
466  * @param s the read-only AVIOContext
467  * @param buf buffer to store the read line
468  * @param maxlen size of the buffer
469  * @return the length of the string written in the buffer
470  */
471 int ff_get_chomp_line(AVIOContext *s, char *buf, int maxlen);
472 
473 /**
474  * Read a whole line of text from AVIOContext to an AVBPrint buffer. Stop
475  * reading after reaching a \\r, a \\n, a \\r\\n, a \\0 or EOF. The line
476  * ending characters are NOT included in the buffer, but they are skipped on
477  * the input.
478  *
479  * @param s the read-only AVIOContext
480  * @param bp the AVBPrint buffer
481  * @return the length of the read line, not including the line endings,
482  * negative on error.
483  */
485 
486 /**
487  * Read a whole line of text from AVIOContext to an AVBPrint buffer overwriting
488  * its contents. Stop reading after reaching a \\r, a \\n, a \\r\\n, a \\0 or
489  * EOF. The line ending characters are NOT included in the buffer, but they
490  * are skipped on the input.
491  *
492  * @param s the read-only AVIOContext
493  * @param bp the AVBPrint buffer
494  * @return the length of the read line not including the line endings,
495  * negative on error, or if the buffer becomes truncated.
496  */
498 
499 #define SPACE_CHARS " \t\r\n"
500 
501 /**
502  * Callback function type for ff_parse_key_value.
503  *
504  * @param key a pointer to the key
505  * @param key_len the number of bytes that belong to the key, including the '='
506  * char
507  * @param dest return the destination pointer for the value in *dest, may
508  * be null to ignore the value
509  * @param dest_len the length of the *dest buffer
510  */
511 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
512  int key_len, char **dest, int *dest_len);
513 /**
514  * Parse a string with comma-separated key=value pairs. The value strings
515  * may be quoted and may contain escaped characters within quoted strings.
516  *
517  * @param str the string to parse
518  * @param callback_get_buf function that returns where to store the
519  * unescaped value string.
520  * @param context the opaque context pointer to pass to callback_get_buf
521  */
522 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
523  void *context);
524 
525 /**
526  * Find stream index based on format-specific stream ID
527  * @return stream index, or < 0 on error
528  */
530 
531 /**
532  * Internal version of av_index_search_timestamp
533  */
534 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
535  int64_t wanted_timestamp, int flags);
536 
537 /**
538  * Internal version of av_add_index_entry
539  */
540 int ff_add_index_entry(AVIndexEntry **index_entries,
541  int *nb_index_entries,
542  unsigned int *index_entries_allocated_size,
543  int64_t pos, int64_t timestamp, int size, int distance, int flags);
544 
546 
547 /**
548  * Add a new chapter.
549  *
550  * @param s media file handle
551  * @param id unique ID for this chapter
552  * @param start chapter start time in time_base units
553  * @param end chapter end time in time_base units
554  * @param title chapter title
555  *
556  * @return AVChapter or NULL on error
557  */
558 #if FF_API_CHAPTER_ID_INT
560 #else
562 #endif
563  int64_t start, int64_t end, const char *title);
564 
565 /**
566  * Ensure the index uses less memory than the maximum specified in
567  * AVFormatContext.max_index_size by discarding entries if it grows
568  * too large.
569  */
570 void ff_reduce_index(AVFormatContext *s, int stream_index);
571 
572 enum AVCodecID ff_guess_image2_codec(const char *filename);
573 
574 /**
575  * Perform a binary search using av_index_search_timestamp() and
576  * AVInputFormat.read_timestamp().
577  *
578  * @param target_ts target timestamp in the time base of the given stream
579  * @param stream_index stream number
580  */
581 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
582  int64_t target_ts, int flags);
583 
584 /**
585  * Update cur_dts of all streams based on the given timestamp and AVStream.
586  *
587  * Stream ref_st unchanged, others set cur_dts in their native time base.
588  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
589  * @param timestamp new dts expressed in time_base of param ref_st
590  * @param ref_st reference stream giving time_base of param timestamp
591  */
592 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
593 
594 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
595  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
596 
597 /**
598  * Perform a binary search using read_timestamp().
599  *
600  * @param target_ts target timestamp in the time base of the given stream
601  * @param stream_index stream number
602  */
603 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
604  int64_t target_ts, int64_t pos_min,
605  int64_t pos_max, int64_t pos_limit,
606  int64_t ts_min, int64_t ts_max,
607  int flags, int64_t *ts_ret,
608  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
609 
610 /**
611  * Set the time base and wrapping info for a given stream. This will be used
612  * to interpret the stream's timestamps. If the new time base is invalid
613  * (numerator or denominator are non-positive), it leaves the stream
614  * unchanged.
615  *
616  * @param s stream
617  * @param pts_wrap_bits number of bits effectively used by the pts
618  * (used for wrap control)
619  * @param pts_num time base numerator
620  * @param pts_den time base denominator
621  */
622 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
623  unsigned int pts_num, unsigned int pts_den);
624 
625 /**
626  * Add side data to a packet for changing parameters to the given values.
627  * Parameters set to 0 aren't included in the change.
628  */
630  uint64_t channel_layout, int32_t sample_rate,
632 
633 /**
634  * Set the timebase for each stream from the corresponding codec timebase and
635  * print it.
636  */
638 
639 /**
640  * Read a transport packet from a media file.
641  *
642  * @param s media file handle
643  * @param pkt is filled
644  * @return 0 if OK, AVERROR_xxx on error
645  */
647 
648 /**
649  * Interleave an AVPacket per dts so it can be muxed.
650  *
651  * @param s an AVFormatContext for output. pkt resp. out will be added to
652  * resp. taken from its packet buffer.
653  * @param out the interleaved packet will be output here
654  * @param pkt the input packet; will be blank on return if not NULL
655  * @param flush 1 if no further packets are available as input and all
656  * remaining packets should be output
657  * @return 1 if a packet was output, 0 if no packet could be output
658  * (in which case out may be uninitialized), < 0 if an error occurred
659  */
661  AVPacket *pkt, int flush);
662 
664 
665 /**
666  * Return the frame duration in seconds. Return 0 if not available.
667  */
668 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
670 
671 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
672 
673 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
674 
675 int ff_is_intra_only(enum AVCodecID id);
676 
677 /**
678  * Select a PCM codec based on the given parameters.
679  *
680  * @param bps bits-per-sample
681  * @param flt floating-point
682  * @param be big-endian
683  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
684  * e.g. the 1st bit indicates if 8-bit should be signed or
685  * unsigned, the 2nd bit indicates if 16-bit should be signed or
686  * unsigned, etc... This is useful for formats such as WAVE where
687  * only 8-bit is unsigned and all other bit depths are signed.
688  * @return a PCM codec id or AV_CODEC_ID_NONE
689  */
690 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
691 
692 /**
693  * Chooses a timebase for muxing the specified stream.
694  *
695  * The chosen timebase allows sample accurate timestamps based
696  * on the framerate or sample rate for audio streams. It also is
697  * at least as precise as 1/min_precision would be.
698  */
699 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
700 
701 /**
702  * Chooses a timebase for muxing the specified stream.
703  */
705 
706 /**
707  * Generate standard extradata for AVC-Intra based on width/height and field
708  * order.
709  */
711 
712 /**
713  * Add a bitstream filter to a stream.
714  *
715  * @param st output stream to add a filter to
716  * @param name the name of the filter to add
717  * @param args filter-specific argument string
718  * @return >0 on success;
719  * AVERROR code on failure
720  */
721 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
722 
723 /**
724  * Copy encoding parameters from source to destination stream
725  *
726  * @param dst pointer to destination AVStream
727  * @param src pointer to source AVStream
728  * @return >=0 on success, AVERROR code on error
729  */
731 
732 /**
733  * Wrap avpriv_io_move and log if error happens.
734  *
735  * @param url_src source path
736  * @param url_dst destination path
737  * @return 0 or AVERROR on failure
738  */
739 int ff_rename(const char *url_src, const char *url_dst, void *logctx);
740 
741 /**
742  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
743  * which is always set to 0.
744  *
745  * Previously allocated extradata in par will be freed.
746  *
747  * @param size size of extradata
748  * @return 0 if OK, AVERROR_xxx on error
749  */
751 
752 /**
753  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
754  * which is always set to 0 and fill it from pb.
755  *
756  * @param size size of extradata
757  * @return >= 0 if OK, AVERROR_xxx on error
758  */
760 
761 /**
762  * add frame for rfps calculation.
763  *
764  * @param dts timestamp of the i-th frame
765  * @return 0 if OK, AVERROR_xxx on error
766  */
768 
770 
771 /**
772  * Flags for AVFormatContext.write_uncoded_frame()
773  */
775 
776  /**
777  * Query whether the feature is possible on this stream.
778  * The frame argument is ignored.
779  */
781 
782 };
783 
784 /**
785  * Copies the whilelists from one context to the other
786  */
788 
789 /**
790  * Returned by demuxers to indicate that data was consumed but discarded
791  * (ignored streams or junk data). The framework will re-call the demuxer.
792  */
793 #define FFERROR_REDO FFERRTAG('R','E','D','O')
794 
795 /**
796  * Utility function to open IO stream of output format.
797  *
798  * @param s AVFormatContext
799  * @param url URL or file name to open for writing
800  * @options optional options which will be passed to io_open callback
801  * @return >=0 on success, negative AVERROR in case of failure
802  */
804 
805 /*
806  * A wrapper around AVFormatContext.io_close that should be used
807  * instead of calling the pointer directly.
808  */
810 
811 /**
812  * Utility function to check if the file uses http or https protocol
813  *
814  * @param s AVFormatContext
815  * @param filename URL or file name to open for writing
816  */
817 int ff_is_http_proto(char *filename);
818 
819 /**
820  * Parse creation_time in AVFormatContext metadata if exists and warn if the
821  * parsing fails.
822  *
823  * @param s AVFormatContext
824  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
825  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
826  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
827  */
828 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
829 
830 /**
831  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
832  * timestamp string.
833  *
834  * @param s AVFormatContext
835  * @return <0 on error
836  */
838 
839 #define CONTAINS_PAL 2
840 /**
841  * Reshuffles the lines to use the user specified stride.
842  *
843  * @param ppkt input and output packet
844  * @return negative error code or
845  * 0 if no new packet was allocated
846  * non-zero if a new packet was allocated and ppkt has to be freed
847  * CONTAINS_PAL if in addition to a new packet the old contained a palette
848  */
849 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
850 
851 /**
852  * Retrieves the palette from a packet, either from side data, or
853  * appended to the video data in the packet itself (raw video only).
854  * It is commonly used after a call to ff_reshuffle_raw_rgb().
855  *
856  * Use 0 for the ret parameter to check for side data only.
857  *
858  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
859  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
860  * @param palette pointer to palette buffer
861  * @return negative error code or
862  * 1 if the packet has a palette, else 0
863  */
864 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
865 
866 /**
867  * Finalize buf into extradata and set its size appropriately.
868  */
869 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
870 
871 /**
872  * Find the next packet in the interleaving queue for the given stream.
873  *
874  * @return a pointer to a packet if one was found, NULL otherwise.
875  */
876 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream);
877 
878 int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset);
879 
880 int ff_lock_avformat(void);
881 int ff_unlock_avformat(void);
882 
883 /**
884  * Set AVFormatContext url field to the provided pointer. The pointer must
885  * point to a valid string. The existing url field is freed if necessary. Also
886  * set the legacy filename field to the same string which was provided in url.
887  */
888 void ff_format_set_url(AVFormatContext *s, char *url);
889 
890 void avpriv_register_devices(const AVOutputFormat * const o[], const AVInputFormat * const i[]);
891 
892 #endif /* AVFORMAT_INTERNAL_H */
static void flush(AVCodecContext *avctx)
channels
Definition: aptx.h:33
uint8_t
int32_t
Main libavformat public API header.
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
long long int64_t
Definition: coverity.c:34
static av_always_inline void RENAME() interleave(TYPE *dst, TYPE *src0, TYPE *src1, int w2, int add, int shift)
const OptionDef options[]
sample_rate
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
const char * key
int i
Definition: input.c:407
int ff_is_http_proto(char *filename)
Utility function to check if the file uses http or https protocol.
Definition: utils.c:5699
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5682
const AVPacket * ff_interleaved_peek(AVFormatContext *s, int stream)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1066
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:932
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:854
#define MAX_REORDER_DELAY
Definition: internal.h:317
int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf)
Finalize buf into extradata and set its size appropriately.
Definition: utils.c:5755
int ff_mkdir_p(const char *path)
Automatically create sub-directories.
Definition: utils.c:4862
enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:106
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:511
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:2145
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:106
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4316
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: utils.c:1927
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:5730
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:4428
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3408
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:160
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4917
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:3143
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:814
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:5029
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3121
int ff_is_intra_only(enum AVCodecID id)
Definition: utils.c:1006
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:1328
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:943
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:830
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:774
@ AV_WRITE_UNCODED_FRAME_QUERY
Query whether the feature is possible on this stream.
Definition: internal.h:780
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:90
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:1954
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:845
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:806
void avpriv_register_devices(const AVOutputFormat *const o[], const AVInputFormat *const i[])
Definition: allformats.c:668
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:4709
#define MAX_STD_TIMEBASES
Definition: internal.h:206
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:2022
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts)
add frame for rfps calculation.
Definition: utils.c:3348
void ff_format_set_url(AVFormatContext *s, char *url)
Set AVFormatContext url field to the provided pointer.
Definition: utils.c:5862
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:2213
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:4714
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: utils.c:2065
int ff_generate_avci_extradata(AVStream *st)
Generate standard extradata for AVC-Intra based on width/height and field order.
Definition: utils.c:5370
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4896
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:4945
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
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:5704
int ff_unlock_avformat(void)
Definition: utils.c:84
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5721
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:3314
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:5576
int ff_get_muxer_ts_offset(AVFormatContext *s, int stream_index, int64_t *offset)
Definition: mux.c:1050
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1892
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
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:789
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5692
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4639
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:2251
int ff_lock_avformat(void)
Definition: utils.c:79
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:5077
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:3332
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:811
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:4975
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:1941
int ff_rename(const char *url_src, const char *url_dst, void *logctx)
Wrap avpriv_io_move and log if error happens.
Definition: avio.c:668
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3131
uint32_t tag
Definition: movenc.c:1611
unsigned bps
Definition: movenc.c:1612
const char data[16]
Definition: mxf.c:142
static float distance(float x, float y, int band)
miscellaneous OS support macros and functions.
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:605
const char * name
Definition: qsvenc.c:46
typedef void(RENAME(mix_any_func_type))
unsigned int pos
Definition: spdifenc.c:412
The bitstream filter state.
Definition: bsf.h:49
main external API structure.
Definition: avcodec.h:536
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
enum AVCodecID id
Definition: internal.h:43
unsigned int tag
Definition: internal.h:44
Format I/O context.
Definition: avformat.h:1232
int prefer_codec_framerate
Definition: internal.h:150
struct PacketList * packet_buffer_end
Definition: internal.h:77
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:69
struct PacketList * parse_queue
Definition: internal.h:94
int raw_packet_buffer_remaining_size
Definition: internal.h:105
struct PacketList * raw_packet_buffer
Raw packets from the demuxer, prior to parsing and decoding.
Definition: internal.h:88
int inject_global_side_data
Definition: internal.h:123
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:140
AVPacket * parse_pkt
Packets split by the parser get queued here.
Definition: internal.h:93
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:112
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:135
struct PacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:76
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:117
AVDictionary * id3v2_meta
ID3v2 tag useful for MP3 demuxing.
Definition: internal.h:145
int chapter_ids_monotonic
Set if chapter ids are strictly monotonic.
Definition: internal.h:155
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:130
AVPacket * pkt
Used to hold temporary packets.
Definition: internal.h:100
struct PacketList * raw_packet_buffer_end
Definition: internal.h:89
int64_t data_offset
offset of the first packet
Definition: internal.h:80
int avoid_negative_ts_use_pts
Definition: internal.h:125
struct PacketList * parse_queue_end
Definition: internal.h:95
int missing_ts_warning
Definition: internal.h:120
Bytestream IO Context.
Definition: avio.h:161
This structure stores compressed data.
Definition: packet.h:346
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVPacket * pkt
Definition: internal.h:193
int nb_decoded_frames
Number of internally decoded frames, used internally in libavformat, do not access its lifetime diffe...
Definition: internal.h:288
uint8_t dts_misordered
Definition: internal.h:332
uint8_t dts_ordered
Definition: internal.h:331
int64_t first_discard_sample
If not 0, the first audio sample that should be discarded from the stream.
Definition: internal.h:275
int64_t pts_wrap_reference
Internal data to check for wrapping of the time stamp.
Definition: internal.h:298
int64_t codec_info_duration_fields
Definition: internal.h:217
int skip_samples
Number of samples to skip at the start of the frame decoded from the next packet.
Definition: internal.h:258
struct AVStreamInternal::@260 * info
Stream information used internally by avformat_find_stream_info()
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:163
int skip_to_keyframe
Indicates that everything up to the next keyframe should be discarded.
Definition: internal.h:253
int64_t fps_last_dts
Definition: internal.h:234
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:180
int avctx_inited
1 if avctx has been initialized with the values from the codec parameters
Definition: internal.h:184
int64_t interleaver_chunk_duration
Definition: internal.h:240
struct AVStreamInternal::@259 extract_extradata
int64_t duration_gcd
Definition: internal.h:212
int64_t mux_ts_offset
Timestamp offset added to timestamps before muxing.
Definition: internal.h:293
int inject_global_side_data
Internal data to inject global side data.
Definition: internal.h:337
int64_t last_dts
Definition: internal.h:211
int64_t last_duration
Definition: internal.h:227
int64_t fps_first_dts
Those are used for average framerate estimation.
Definition: internal.h:232
int fps_first_dts_idx
Definition: internal.h:233
double(* duration_error)[2][MAX_STD_TIMEBASES]
Definition: internal.h:215
int64_t pts_reorder_error[MAX_REORDER_DELAY+1]
Internal data to generate dts from pts.
Definition: internal.h:322
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:175
uint8_t pts_reorder_error_count[MAX_REORDER_DELAY+1]
Definition: internal.h:323
int found_decoder
0 -> decoder has not been searched for yet.
Definition: internal.h:225
int64_t last_dts_for_order_check
Internal data to analyze DTS and detect faulty mpeg streams.
Definition: internal.h:330
AVProbeData probe_data
Definition: internal.h:346
int64_t pts_buffer[MAX_REORDER_DELAY+1]
Definition: internal.h:325
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
Definition: internal.h:200
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:267
struct PacketList * last_in_packet_buffer
last packet in packet_buffer for this stream when muxing.
Definition: internal.h:351
int64_t rfps_duration_sum
Definition: internal.h:214
FFFrac * priv_pts
Definition: internal.h:204
int fps_last_dts_idx
Definition: internal.h:235
int request_probe
stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with re...
Definition: internal.h:248
int frame_delay_evidence
Definition: internal.h:218
int64_t last_discard_sample
The sample after last sample that is intended to be discarded after first_discard_sample.
Definition: internal.h:282
int pts_wrap_behavior
Options for behavior, when a wrap is detected.
Definition: internal.h:310
enum AVCodecID orig_codec_id
Definition: internal.h:186
int64_t codec_info_duration
Definition: internal.h:216
AVBSFContext * bsfc
bitstream filter to run on stream
Definition: internal.h:170
AVBSFContext * bsf
Definition: internal.h:192
int update_initial_durations_done
Internal data to prevent doing update_initial_durations() twice.
Definition: internal.h:315
int64_t interleaver_chunk_size
Definition: internal.h:239
AVRational display_aspect_ratio
display aspect ratio (0 if unknown)
Definition: internal.h:344
Stream structure.
Definition: avformat.h:873
char str[32]
Definition: internal.h:48
enum AVCodecID id
Definition: internal.h:49
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:59
int64_t num
Definition: internal.h:60
int64_t val
Definition: internal.h:60
int64_t den
Definition: internal.h:60
#define src
Definition: vp8dsp.c:255
FILE * out
Definition: movenc.c:54
AVPacket * pkt
Definition: movenc.c:59
#define height
#define width
int size
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:104
static const uint8_t offset[127][2]
Definition: vf_spp.c:107