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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 #define MAX_PROBE_PACKETS 2500
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 typedef struct AVCodecTag {
45  enum AVCodecID id;
46  unsigned int tag;
47 } AVCodecTag;
48 
49 typedef struct CodecMime{
50  char str[32];
51  enum AVCodecID id;
52 } CodecMime;
53 
54 /*************************************************/
55 /* fractional numbers for exact pts handling */
56 
57 /**
58  * The exact value of the fractional number is: 'val + num / den'.
59  * num is assumed to be 0 <= num < den.
60  */
61 typedef struct FFFrac {
62  int64_t val, num, den;
63 } FFFrac;
64 
65 
67  /**
68  * Number of streams relevant for interleaving.
69  * Muxing only.
70  */
72 
73  /**
74  * This buffer is only needed when packets were already buffered but
75  * not decoded, for example to get the codec parameters in MPEG
76  * streams.
77  */
80 
81  /* av_seek_frame() support */
82  int64_t data_offset; /**< offset of the first packet */
83 
84  /**
85  * Raw packets from the demuxer, prior to parsing and decoding.
86  * This buffer is used for buffering packets until the codec can
87  * be identified, as parsing cannot be done without knowing the
88  * codec.
89  */
92  /**
93  * Packets split by the parser get queued here.
94  */
97  /**
98  * Remaining size available for raw_packet_buffer, in bytes.
99  */
100 #define RAW_PACKET_BUFFER_SIZE 2500000
102 
103  /**
104  * Offset to remap timestamps to be non-negative.
105  * Expressed in timebase units.
106  * @see AVStream.mux_ts_offset
107  */
108  int64_t offset;
109 
110  /**
111  * Timebase for the timestamp offset.
112  */
114 
115 #if FF_API_COMPUTE_PKT_FIELDS2
116  int missing_ts_warning;
117 #endif
118 
120 
122 
123  /**
124  * Whether or not a header has already been written
125  */
128 
129  /**
130  * Timestamp of the end of the shortest stream.
131  */
132  int64_t shortest_end;
133 
134  /**
135  * Whether or not avformat_init_output has already been called
136  */
138 
139  /**
140  * Whether or not avformat_init_output fully initialized streams
141  */
143 
144  /**
145  * ID3v2 tag useful for MP3 demuxing
146  */
148 
149  /*
150  * Prefer the codec framerate for avg_frame_rate computation.
151  */
153 };
154 
156  /**
157  * Set to 1 if the codec allows reordering, so pts can be different
158  * from dts.
159  */
160  int reorder;
161 
162  /**
163  * bitstream filters to run on stream
164  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
165  * - decoding: unused
166  */
168  int nb_bsfcs;
169 
170  /**
171  * Whether or not check_bitstream should still be run on each packet
172  */
174 
175  /**
176  * The codec context used by avformat_find_stream_info, the parser, etc.
177  */
179  /**
180  * 1 if avctx has been initialized with the values from the codec parameters
181  */
183 
185 
186  /* the context for extracting extradata in find_stream_info()
187  * inited=1/bsf=NULL signals that extracting is not possible (codec not
188  * supported) */
189  struct {
192  int inited;
194 
195  /**
196  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
197  */
199 };
200 
201 #ifdef __GNUC__
202 #define dynarray_add(tab, nb_ptr, elem)\
203 do {\
204  __typeof__(tab) _tab = (tab);\
205  __typeof__(elem) _elem = (elem);\
206  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
207  av_dynarray_add(_tab, nb_ptr, _elem);\
208 } while(0)
209 #else
210 #define dynarray_add(tab, nb_ptr, elem)\
211 do {\
212  av_dynarray_add((tab), nb_ptr, (elem));\
213 } while(0)
214 #endif
215 
216 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
217 
218 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
219 
220 /**
221  * Parse a string of hexadecimal strings. Any space between the hexadecimal
222  * digits is ignored.
223  *
224  * @param data if non-null, the parsed data is written to this pointer
225  * @param p the string to parse
226  * @return the number of bytes written (or to be written, if data is null)
227  */
228 int ff_hex_to_data(uint8_t *data, const char *p);
229 
230 /**
231  * Add packet to AVFormatContext->packet_buffer list, determining its
232  * interleaved position using compare() function argument.
233  * @return 0, or < 0 on error
234  */
236  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
237 
239 
240 #define NTP_OFFSET 2208988800ULL
241 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
242 
243 /** Get the current time since NTP epoch in microseconds. */
244 uint64_t ff_ntp_time(void);
245 
246 /**
247  * Append the media-specific SDP fragment for the media stream c
248  * to the buffer buff.
249  *
250  * Note, the buffer needs to be initialized, since it is appended to
251  * existing content.
252  *
253  * @param buff the buffer to append the SDP fragment to
254  * @param size the size of the buff buffer
255  * @param st the AVStream of the media to describe
256  * @param idx the global stream index
257  * @param dest_addr the destination address of the media stream, may be NULL
258  * @param dest_type the destination address type, may be NULL
259  * @param port the destination port of the media stream, 0 if unknown
260  * @param ttl the time to live of the stream, 0 if not multicast
261  * @param fmt the AVFormatContext, which might contain options modifying
262  * the generated SDP
263  */
264 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
265  const char *dest_addr, const char *dest_type,
266  int port, int ttl, AVFormatContext *fmt);
267 
268 /**
269  * Write a packet to another muxer than the one the user originally
270  * intended. Useful when chaining muxers, where one muxer internally
271  * writes a received packet to another muxer.
272  *
273  * @param dst the muxer to write the packet to
274  * @param dst_stream the stream index within dst to write the packet to
275  * @param pkt the packet to be written
276  * @param src the muxer the packet originally was intended for
277  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
278  * @return the value av_write_frame returned
279  */
280 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
282 
283 /**
284  * Get the length in bytes which is needed to store val as v.
285  */
286 int ff_get_v_length(uint64_t val);
287 
288 /**
289  * Put val using a variable number of bytes.
290  */
291 void ff_put_v(AVIOContext *bc, uint64_t val);
292 
293 /**
294  * Read a whole line of text from AVIOContext. Stop reading after reaching
295  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
296  * and may be truncated if the buffer is too small.
297  *
298  * @param s the read-only AVIOContext
299  * @param buf buffer to store the read line
300  * @param maxlen size of the buffer
301  * @return the length of the string written in the buffer, not including the
302  * final \\0
303  */
304 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
305 
306 #define SPACE_CHARS " \t\r\n"
307 
308 /**
309  * Callback function type for ff_parse_key_value.
310  *
311  * @param key a pointer to the key
312  * @param key_len the number of bytes that belong to the key, including the '='
313  * char
314  * @param dest return the destination pointer for the value in *dest, may
315  * be null to ignore the value
316  * @param dest_len the length of the *dest buffer
317  */
318 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
319  int key_len, char **dest, int *dest_len);
320 /**
321  * Parse a string with comma-separated key=value pairs. The value strings
322  * may be quoted and may contain escaped characters within quoted strings.
323  *
324  * @param str the string to parse
325  * @param callback_get_buf function that returns where to store the
326  * unescaped value string.
327  * @param context the opaque context pointer to pass to callback_get_buf
328  */
329 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
330  void *context);
331 
332 /**
333  * Find stream index based on format-specific stream ID
334  * @return stream index, or < 0 on error
335  */
336 int ff_find_stream_index(AVFormatContext *s, int id);
337 
338 /**
339  * Internal version of av_index_search_timestamp
340  */
341 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
342  int64_t wanted_timestamp, int flags);
343 
344 /**
345  * Internal version of av_add_index_entry
346  */
347 int ff_add_index_entry(AVIndexEntry **index_entries,
348  int *nb_index_entries,
349  unsigned int *index_entries_allocated_size,
350  int64_t pos, int64_t timestamp, int size, int distance, int flags);
351 
352 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
353 
354 /**
355  * Add a new chapter.
356  *
357  * @param s media file handle
358  * @param id unique ID for this chapter
359  * @param start chapter start time in time_base units
360  * @param end chapter end time in time_base units
361  * @param title chapter title
362  *
363  * @return AVChapter or NULL on error
364  */
366  int64_t start, int64_t end, const char *title);
367 
368 /**
369  * Ensure the index uses less memory than the maximum specified in
370  * AVFormatContext.max_index_size by discarding entries if it grows
371  * too large.
372  */
373 void ff_reduce_index(AVFormatContext *s, int stream_index);
374 
375 enum AVCodecID ff_guess_image2_codec(const char *filename);
376 
377 /**
378  * Perform a binary search using av_index_search_timestamp() and
379  * AVInputFormat.read_timestamp().
380  *
381  * @param target_ts target timestamp in the time base of the given stream
382  * @param stream_index stream number
383  */
384 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
385  int64_t target_ts, int flags);
386 
387 /**
388  * Update cur_dts of all streams based on the given timestamp and AVStream.
389  *
390  * Stream ref_st unchanged, others set cur_dts in their native time base.
391  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
392  * @param timestamp new dts expressed in time_base of param ref_st
393  * @param ref_st reference stream giving time_base of param timestamp
394  */
395 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
396 
397 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
398  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
399 
400 /**
401  * Perform a binary search using read_timestamp().
402  *
403  * @param target_ts target timestamp in the time base of the given stream
404  * @param stream_index stream number
405  */
406 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
407  int64_t target_ts, int64_t pos_min,
408  int64_t pos_max, int64_t pos_limit,
409  int64_t ts_min, int64_t ts_max,
410  int flags, int64_t *ts_ret,
411  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
412 
413 /**
414  * Set the time base and wrapping info for a given stream. This will be used
415  * to interpret the stream's timestamps. If the new time base is invalid
416  * (numerator or denominator are non-positive), it leaves the stream
417  * unchanged.
418  *
419  * @param s stream
420  * @param pts_wrap_bits number of bits effectively used by the pts
421  * (used for wrap control)
422  * @param pts_num time base numerator
423  * @param pts_den time base denominator
424  */
425 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
426  unsigned int pts_num, unsigned int pts_den);
427 
428 /**
429  * Add side data to a packet for changing parameters to the given values.
430  * Parameters set to 0 aren't included in the change.
431  */
432 int ff_add_param_change(AVPacket *pkt, int32_t channels,
433  uint64_t channel_layout, int32_t sample_rate,
435 
436 /**
437  * Set the timebase for each stream from the corresponding codec timebase and
438  * print it.
439  */
441 
442 /**
443  * Read a transport packet from a media file.
444  *
445  * @param s media file handle
446  * @param pkt is filled
447  * @return 0 if OK, AVERROR_xxx on error
448  */
450 
451 /**
452  * Interleave a packet per dts in an output media file.
453  *
454  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
455  * function, so they cannot be used after it. Note that calling av_packet_unref()
456  * on them is still safe.
457  *
458  * @param s media file handle
459  * @param out the interleaved packet will be output here
460  * @param pkt the input packet
461  * @param flush 1 if no further packets are available as input and all
462  * remaining packets should be output
463  * @return 1 if a packet was output, 0 if no packet could be output,
464  * < 0 if an error occurred
465  */
467  AVPacket *pkt, int flush);
468 
470 
471 /**
472  * Return the frame duration in seconds. Return 0 if not available.
473  */
474 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
475  AVCodecParserContext *pc, AVPacket *pkt);
476 
477 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
478 
479 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
480 
481 /**
482  * Select a PCM codec based on the given parameters.
483  *
484  * @param bps bits-per-sample
485  * @param flt floating-point
486  * @param be big-endian
487  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
488  * e.g. the 1st bit indicates if 8-bit should be signed or
489  * unsigned, the 2nd bit indicates if 16-bit should be signed or
490  * unsigned, etc... This is useful for formats such as WAVE where
491  * only 8-bit is unsigned and all other bit depths are signed.
492  * @return a PCM codec id or AV_CODEC_ID_NONE
493  */
494 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
495 
496 /**
497  * Chooses a timebase for muxing the specified stream.
498  *
499  * The chosen timebase allows sample accurate timestamps based
500  * on the framerate or sample rate for audio streams. It also is
501  * at least as precise as 1/min_precision would be.
502  */
503 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
504 
505 /**
506  * Chooses a timebase for muxing the specified stream.
507  */
509 
510 /**
511  * Generate standard extradata for AVC-Intra based on width/height and field
512  * order.
513  */
515 
516 /**
517  * Add a bitstream filter to a stream.
518  *
519  * @param st output stream to add a filter to
520  * @param name the name of the filter to add
521  * @param args filter-specific argument string
522  * @return >0 on success;
523  * AVERROR code on failure
524  */
525 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
526 
527 /**
528  * Copy encoding parameters from source to destination stream
529  *
530  * @param dst pointer to destination AVStream
531  * @param src pointer to source AVStream
532  * @return >=0 on success, AVERROR code on error
533  */
535 
536 /**
537  * Wrap errno on rename() error.
538  *
539  * @param oldpath source path
540  * @param newpath destination path
541  * @return 0 or AVERROR on failure
542  */
543 static inline int ff_rename(const char *oldpath, const char *newpath, void *logctx)
544 {
545  int ret = 0;
546  if (rename(oldpath, newpath) == -1) {
547  ret = AVERROR(errno);
548  if (logctx)
549  av_log(logctx, AV_LOG_ERROR, "failed to rename file %s to %s\n", oldpath, newpath);
550  }
551  return ret;
552 }
553 
554 /**
555  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
556  * which is always set to 0.
557  *
558  * @param size size of extradata
559  * @return 0 if OK, AVERROR_xxx on error
560  */
562 
563 /**
564  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
565  * which is always set to 0 and fill it from pb.
566  *
567  * @param size size of extradata
568  * @return >= 0 if OK, AVERROR_xxx on error
569  */
571 
572 /**
573  * add frame for rfps calculation.
574  *
575  * @param dts timestamp of the i-th frame
576  * @return 0 if OK, AVERROR_xxx on error
577  */
578 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
579 
581 
582 /**
583  * Flags for AVFormatContext.write_uncoded_frame()
584  */
586 
587  /**
588  * Query whether the feature is possible on this stream.
589  * The frame argument is ignored.
590  */
592 
593 };
594 
595 /**
596  * Copies the whilelists from one context to the other
597  */
599 
600 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
602 
603 /**
604  * Returned by demuxers to indicate that data was consumed but discarded
605  * (ignored streams or junk data). The framework will re-call the demuxer.
606  */
607 #define FFERROR_REDO FFERRTAG('R','E','D','O')
608 
609 /**
610  * Utility function to open IO stream of output format.
611  *
612  * @param s AVFormatContext
613  * @param url URL or file name to open for writing
614  * @options optional options which will be passed to io_open callback
615  * @return >=0 on success, negative AVERROR in case of failure
616  */
617 int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options);
618 
619 /*
620  * A wrapper around AVFormatContext.io_close that should be used
621  * instead of calling the pointer directly.
622  */
624 
625 /**
626  * Parse creation_time in AVFormatContext metadata if exists and warn if the
627  * parsing fails.
628  *
629  * @param s AVFormatContext
630  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
631  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
632  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
633  */
634 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
635 
636 /**
637  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
638  * timestamp string.
639  *
640  * @param s AVFormatContext
641  * @return <0 on error
642  */
644 
645 #define CONTAINS_PAL 2
646 /**
647  * Reshuffles the lines to use the user specified stride.
648  *
649  * @param ppkt input and output packet
650  * @return negative error code or
651  * 0 if no new packet was allocated
652  * non-zero if a new packet was allocated and ppkt has to be freed
653  * CONTAINS_PAL if in addition to a new packet the old contained a palette
654  */
655 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
656 
657 /**
658  * Retrieves the palette from a packet, either from side data, or
659  * appended to the video data in the packet itself (raw video only).
660  * It is commonly used after a call to ff_reshuffle_raw_rgb().
661  *
662  * Use 0 for the ret parameter to check for side data only.
663  *
664  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
665  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
666  * @param palette pointer to palette buffer
667  * @return negative error code or
668  * 1 if the packet has a palette, else 0
669  */
670 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
671 
672 /**
673  * Finalize buf into extradata and set its size appropriately.
674  */
675 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
676 
677 /**
678  * Find the next packet in the interleaving queue for the given stream.
679  * The pkt parameter is filled in with the queued packet, including
680  * references to the data (which the caller is not allowed to keep or
681  * modify).
682  *
683  * @return 0 if a packet was found, a negative value if no packet was found
684  */
685 int ff_interleaved_peek(AVFormatContext *s, int stream,
686  AVPacket *pkt, int add_offset);
687 
688 #endif /* AVFORMAT_INTERNAL_H */
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
static float compare(const AVFrame *haystack, const AVFrame *obj, int offx, int offy)
Definition: vf_find_rect.c:105
void ff_put_v(AVIOContext *bc, uint64_t val)
Put val using a variable number of bytes.
Definition: aviobuf.c:445
AVDictionary * id3v2_meta
ID3v2 tag useful for MP3 demuxing.
Definition: internal.h:147
const char const char void * val
Definition: avisynth_c.h:771
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:161
int ff_interleaved_peek(AVFormatContext *s, int stream, AVPacket *pkt, int add_offset)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1193
enum AVCodecID id
Definition: internal.h:45
struct AVPacketList * raw_packet_buffer
Raw packets from the demuxer, prior to parsing and decoding.
Definition: internal.h:90
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:173
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
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:318
static void flush(AVCodecContext *avctx)
struct AVPacketList * parse_queue_end
Definition: internal.h:96
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3050
const char * fmt
Definition: avisynth_c.h:769
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:160
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:4739
int ff_copy_whiteblacklists(AVFormatContext *dst, const AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:145
int64_t data_offset
offset of the first packet
Definition: internal.h:82
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:1372
struct tm * ff_brktimegm(time_t secs, struct tm *tm)
Definition: cutils.c:31
The bitstream filter state.
Definition: avcodec.h:5893
int prefer_codec_framerate
Definition: internal.h:152
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:108
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3040
int avoid_negative_ts_use_pts
Definition: internal.h:121
static AVPacket pkt
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:1989
#define src
Definition: vp8dsp.c:254
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4121
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:4496
Format I/O context.
Definition: avformat.h:1349
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:1894
char str[32]
Definition: internal.h:50
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1859
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:1908
uint8_t
int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
Definition: aviobuf.c:1099
miscellaneous OS support macros and functions.
Query whether the feature is possible on this stream.
Definition: internal.h:591
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:61
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:5451
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:910
#define height
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
Interleave a packet per dts in an output media file.
Definition: mux.c:1074
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5441
static int flags
Definition: log.c:57
int header_written
Whether or not a header has already been written.
Definition: internal.h:126
uint32_t tag
Definition: movenc.c:1407
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: utils.c:2032
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4191
enum AVCodecID id
Definition: internal.h:51
ptrdiff_t size
Definition: opengl_enc.c:101
int write_header_ret
Definition: internal.h:127
struct AVPacketList * packet_buffer
This buffer is only needed when packets were already buffered but not decoded, for example to get the...
Definition: internal.h:78
int raw_packet_buffer_remaining_size
Definition: internal.h:101
const OptionDef options[]
Definition: ffserver.c:3952
#define av_log(a,...)
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3308
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:4554
Callback for checking whether to abort blocking functions.
Definition: avio.h:58
int avctx_inited
1 if avctx has been initialized with the values from the codec parameters
Definition: internal.h:182
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:5458
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:214
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
const AVIOInterruptCB int_cb
Definition: ffmpeg.c:464
#define AVERROR(e)
Definition: error.h:43
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, AVPacket *, AVPacket *))
Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare...
Definition: mux.c:973
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:4873
uint16_t width
Definition: gdv.c:47
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5475
int64_t val
Definition: internal.h:62
AVPacket * pkt
Definition: internal.h:191
static float distance(float x, float y, int band)
int streams_initialized
Whether or not avformat_init_output fully initialized streams.
Definition: internal.h:142
int ff_generate_avci_extradata(AVStream *st)
Generate standard extradata for AVC-Intra based on width/height and field order.
Definition: utils.c:5116
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:167
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4823
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:3213
int64_t shortest_end
Timestamp of the end of the shortest stream.
Definition: internal.h:132
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:4296
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
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:5484
int32_t
int64_t num
Definition: internal.h:62
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:791
Stream structure.
Definition: avformat.h:889
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts)
add frame for rfps calculation.
Definition: utils.c:3250
sample_rate
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:1921
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:102
int64_t den
Definition: internal.h:62
main external API structure.
Definition: avcodec.h:1746
void * buf
Definition: avisynth_c.h:690
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:543
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:102
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:71
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:2210
int initialized
Whether or not avformat_init_output has already been called.
Definition: internal.h:137
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:3062
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf)
Finalize buf into extradata and set its size appropriately.
Definition: utils.c:5509
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:198
int inject_global_side_data
Definition: internal.h:119
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4711
static void interleave(short *output, short **input, int channels, int samples)
Definition: resample.c:161
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:2172
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:4769
enum AVChromaLocation ff_choose_chroma_location(AVFormatContext *s, AVStream *st)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:118
unsigned int tag
Definition: internal.h:46
struct AVPacketList * parse_queue
Packets split by the parser get queued here.
Definition: internal.h:95
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:113
int ff_get_v_length(uint64_t val)
Get the length in bytes which is needed to store val as v.
Definition: aviobuf.c:435
int palette
Definition: v4l.c:61
Main libavformat public API header.
struct AVStreamInternal::@213 extract_extradata
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:832
enum AVCodecID orig_codec_id
Definition: internal.h:184
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:3234
unsigned bps
Definition: movenc.c:1408
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:585
struct AVPacketList * packet_buffer_end
Definition: internal.h:79
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:5326
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
AVCodecContext * avctx
The codec context used by avformat_find_stream_info, the parser, etc.
Definition: internal.h:178
FILE * out
Definition: movenc.c:54
void INT64 start
Definition: avisynth_c.h:690
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:522
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:791
AVBSFContext * bsf
Definition: internal.h:190
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4690
This structure stores compressed data.
Definition: avcodec.h:1648
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:2104
struct AVPacketList * raw_packet_buffer_end
Definition: internal.h:91
const char * name
Definition: opengl_enc.c:103