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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 
146  /**
147  * Set to 1 if the codec allows reordering, so pts can be different
148  * from dts.
149  */
150  int reorder;
151 
152  /**
153  * bitstream filters to run on stream
154  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
155  * - decoding: unused
156  */
158  int nb_bsfcs;
159 
160  /**
161  * Whether or not check_bitstream should still be run on each packet
162  */
164 
165  /**
166  * The codec context used by avformat_find_stream_info, the parser, etc.
167  */
169  /**
170  * 1 if avctx has been initialized with the values from the codec parameters
171  */
173 
175 
176  /**
177  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
178  */
180 };
181 
182 #ifdef __GNUC__
183 #define dynarray_add(tab, nb_ptr, elem)\
184 do {\
185  __typeof__(tab) _tab = (tab);\
186  __typeof__(elem) _elem = (elem);\
187  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
188  av_dynarray_add(_tab, nb_ptr, _elem);\
189 } while(0)
190 #else
191 #define dynarray_add(tab, nb_ptr, elem)\
192 do {\
193  av_dynarray_add((tab), nb_ptr, (elem));\
194 } while(0)
195 #endif
196 
197 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
198 
199 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
200 
201 /**
202  * Parse a string of hexadecimal strings. Any space between the hexadecimal
203  * digits is ignored.
204  *
205  * @param data if non-null, the parsed data is written to this pointer
206  * @param p the string to parse
207  * @return the number of bytes written (or to be written, if data is null)
208  */
209 int ff_hex_to_data(uint8_t *data, const char *p);
210 
211 /**
212  * Add packet to AVFormatContext->packet_buffer list, determining its
213  * interleaved position using compare() function argument.
214  * @return 0, or < 0 on error
215  */
217  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
218 
220 
221 #define NTP_OFFSET 2208988800ULL
222 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
223 
224 /** Get the current time since NTP epoch in microseconds. */
225 uint64_t ff_ntp_time(void);
226 
227 /**
228  * Append the media-specific SDP fragment for the media stream c
229  * to the buffer buff.
230  *
231  * Note, the buffer needs to be initialized, since it is appended to
232  * existing content.
233  *
234  * @param buff the buffer to append the SDP fragment to
235  * @param size the size of the buff buffer
236  * @param st the AVStream of the media to describe
237  * @param idx the global stream index
238  * @param dest_addr the destination address of the media stream, may be NULL
239  * @param dest_type the destination address type, may be NULL
240  * @param port the destination port of the media stream, 0 if unknown
241  * @param ttl the time to live of the stream, 0 if not multicast
242  * @param fmt the AVFormatContext, which might contain options modifying
243  * the generated SDP
244  */
245 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
246  const char *dest_addr, const char *dest_type,
247  int port, int ttl, AVFormatContext *fmt);
248 
249 /**
250  * Write a packet to another muxer than the one the user originally
251  * intended. Useful when chaining muxers, where one muxer internally
252  * writes a received packet to another muxer.
253  *
254  * @param dst the muxer to write the packet to
255  * @param dst_stream the stream index within dst to write the packet to
256  * @param pkt the packet to be written
257  * @param src the muxer the packet originally was intended for
258  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
259  * @return the value av_write_frame returned
260  */
261 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
263 
264 /**
265  * Get the length in bytes which is needed to store val as v.
266  */
267 int ff_get_v_length(uint64_t val);
268 
269 /**
270  * Put val using a variable number of bytes.
271  */
272 void ff_put_v(AVIOContext *bc, uint64_t val);
273 
274 /**
275  * Read a whole line of text from AVIOContext. Stop reading after reaching
276  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
277  * and may be truncated if the buffer is too small.
278  *
279  * @param s the read-only AVIOContext
280  * @param buf buffer to store the read line
281  * @param maxlen size of the buffer
282  * @return the length of the string written in the buffer, not including the
283  * final \\0
284  */
285 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
286 
287 #define SPACE_CHARS " \t\r\n"
288 
289 /**
290  * Callback function type for ff_parse_key_value.
291  *
292  * @param key a pointer to the key
293  * @param key_len the number of bytes that belong to the key, including the '='
294  * char
295  * @param dest return the destination pointer for the value in *dest, may
296  * be null to ignore the value
297  * @param dest_len the length of the *dest buffer
298  */
299 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
300  int key_len, char **dest, int *dest_len);
301 /**
302  * Parse a string with comma-separated key=value pairs. The value strings
303  * may be quoted and may contain escaped characters within quoted strings.
304  *
305  * @param str the string to parse
306  * @param callback_get_buf function that returns where to store the
307  * unescaped value string.
308  * @param context the opaque context pointer to pass to callback_get_buf
309  */
310 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
311  void *context);
312 
313 /**
314  * Find stream index based on format-specific stream ID
315  * @return stream index, or < 0 on error
316  */
317 int ff_find_stream_index(AVFormatContext *s, int id);
318 
319 /**
320  * Internal version of av_index_search_timestamp
321  */
322 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
323  int64_t wanted_timestamp, int flags);
324 
325 /**
326  * Internal version of av_add_index_entry
327  */
328 int ff_add_index_entry(AVIndexEntry **index_entries,
329  int *nb_index_entries,
330  unsigned int *index_entries_allocated_size,
331  int64_t pos, int64_t timestamp, int size, int distance, int flags);
332 
333 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
334 
335 /**
336  * Add a new chapter.
337  *
338  * @param s media file handle
339  * @param id unique ID for this chapter
340  * @param start chapter start time in time_base units
341  * @param end chapter end time in time_base units
342  * @param title chapter title
343  *
344  * @return AVChapter or NULL on error
345  */
347  int64_t start, int64_t end, const char *title);
348 
349 /**
350  * Ensure the index uses less memory than the maximum specified in
351  * AVFormatContext.max_index_size by discarding entries if it grows
352  * too large.
353  */
354 void ff_reduce_index(AVFormatContext *s, int stream_index);
355 
356 enum AVCodecID ff_guess_image2_codec(const char *filename);
357 
358 /**
359  * Perform a binary search using av_index_search_timestamp() and
360  * AVInputFormat.read_timestamp().
361  *
362  * @param target_ts target timestamp in the time base of the given stream
363  * @param stream_index stream number
364  */
365 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
366  int64_t target_ts, int flags);
367 
368 /**
369  * Update cur_dts of all streams based on the given timestamp and AVStream.
370  *
371  * Stream ref_st unchanged, others set cur_dts in their native time base.
372  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
373  * @param timestamp new dts expressed in time_base of param ref_st
374  * @param ref_st reference stream giving time_base of param timestamp
375  */
376 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
377 
378 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
379  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
380 
381 /**
382  * Perform a binary search using read_timestamp().
383  *
384  * @param target_ts target timestamp in the time base of the given stream
385  * @param stream_index stream number
386  */
387 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
388  int64_t target_ts, int64_t pos_min,
389  int64_t pos_max, int64_t pos_limit,
390  int64_t ts_min, int64_t ts_max,
391  int flags, int64_t *ts_ret,
392  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
393 
394 /**
395  * Set the time base and wrapping info for a given stream. This will be used
396  * to interpret the stream's timestamps. If the new time base is invalid
397  * (numerator or denominator are non-positive), it leaves the stream
398  * unchanged.
399  *
400  * @param s stream
401  * @param pts_wrap_bits number of bits effectively used by the pts
402  * (used for wrap control)
403  * @param pts_num time base numerator
404  * @param pts_den time base denominator
405  */
406 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
407  unsigned int pts_num, unsigned int pts_den);
408 
409 /**
410  * Add side data to a packet for changing parameters to the given values.
411  * Parameters set to 0 aren't included in the change.
412  */
413 int ff_add_param_change(AVPacket *pkt, int32_t channels,
414  uint64_t channel_layout, int32_t sample_rate,
416 
417 /**
418  * Set the timebase for each stream from the corresponding codec timebase and
419  * print it.
420  */
422 
423 /**
424  * Read a transport packet from a media file.
425  *
426  * @param s media file handle
427  * @param pkt is filled
428  * @return 0 if OK, AVERROR_xxx on error
429  */
431 
432 /**
433  * Interleave a packet per dts in an output media file.
434  *
435  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
436  * function, so they cannot be used after it. Note that calling av_packet_unref()
437  * on them is still safe.
438  *
439  * @param s media file handle
440  * @param out the interleaved packet will be output here
441  * @param pkt the input packet
442  * @param flush 1 if no further packets are available as input and all
443  * remaining packets should be output
444  * @return 1 if a packet was output, 0 if no packet could be output,
445  * < 0 if an error occurred
446  */
448  AVPacket *pkt, int flush);
449 
451 
452 /**
453  * Return the frame duration in seconds. Return 0 if not available.
454  */
455 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
456  AVCodecParserContext *pc, AVPacket *pkt);
457 
458 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
459 
460 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
461 
462 /**
463  * Select a PCM codec based on the given parameters.
464  *
465  * @param bps bits-per-sample
466  * @param flt floating-point
467  * @param be big-endian
468  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
469  * e.g. the 1st bit indicates if 8-bit should be signed or
470  * unsigned, the 2nd bit indicates if 16-bit should be signed or
471  * unsigned, etc... This is useful for formats such as WAVE where
472  * only 8-bit is unsigned and all other bit depths are signed.
473  * @return a PCM codec id or AV_CODEC_ID_NONE
474  */
475 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
476 
477 /**
478  * Chooses a timebase for muxing the specified stream.
479  *
480  * The chosen timebase allows sample accurate timestamps based
481  * on the framerate or sample rate for audio streams. It also is
482  * at least as precise as 1/min_precision would be.
483  */
484 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
485 
486 /**
487  * Chooses a timebase for muxing the specified stream.
488  */
490 
491 /**
492  * Generate standard extradata for AVC-Intra based on width/height and field
493  * order.
494  */
496 
497 /**
498  * Add a bitstream filter to a stream.
499  *
500  * @param st output stream to add a filter to
501  * @param name the name of the filter to add
502  * @param args filter-specific argument string
503  * @return >0 on success;
504  * AVERROR code on failure
505  */
506 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
507 
508 /**
509  * Copy encoding parameters from source to destination stream
510  *
511  * @param dst pointer to destination AVStream
512  * @param src pointer to source AVStream
513  * @return >=0 on success, AVERROR code on error
514  */
516 
517 /**
518  * Wrap errno on rename() error.
519  *
520  * @param oldpath source path
521  * @param newpath destination path
522  * @return 0 or AVERROR on failure
523  */
524 static inline int ff_rename(const char *oldpath, const char *newpath, void *logctx)
525 {
526  int ret = 0;
527  if (rename(oldpath, newpath) == -1) {
528  ret = AVERROR(errno);
529  if (logctx)
530  av_log(logctx, AV_LOG_ERROR, "failed to rename file %s to %s\n", oldpath, newpath);
531  }
532  return ret;
533 }
534 
535 /**
536  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
537  * which is always set to 0.
538  *
539  * @param size size of extradata
540  * @return 0 if OK, AVERROR_xxx on error
541  */
543 
544 /**
545  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
546  * which is always set to 0 and fill it from pb.
547  *
548  * @param size size of extradata
549  * @return >= 0 if OK, AVERROR_xxx on error
550  */
552 
553 /**
554  * add frame for rfps calculation.
555  *
556  * @param dts timestamp of the i-th frame
557  * @return 0 if OK, AVERROR_xxx on error
558  */
559 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
560 
562 
563 /**
564  * Flags for AVFormatContext.write_uncoded_frame()
565  */
567 
568  /**
569  * Query whether the feature is possible on this stream.
570  * The frame argument is ignored.
571  */
573 
574 };
575 
576 /**
577  * Copies the whilelists from one context to the other
578  */
580 
581 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
583 
584 /**
585  * Returned by demuxers to indicate that data was consumed but discarded
586  * (ignored streams or junk data). The framework will re-call the demuxer.
587  */
588 #define FFERROR_REDO FFERRTAG('R','E','D','O')
589 
590 /**
591  * Utility function to open IO stream of output format.
592  *
593  * @param s AVFormatContext
594  * @param url URL or file name to open for writing
595  * @options optional options which will be passed to io_open callback
596  * @return >=0 on success, negative AVERROR in case of failure
597  */
598 int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options);
599 
600 /*
601  * A wrapper around AVFormatContext.io_close that should be used
602  * instead of calling the pointer directly.
603  */
605 
606 /**
607  * Parse creation_time in AVFormatContext metadata if exists and warn if the
608  * parsing fails.
609  *
610  * @param s AVFormatContext
611  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
612  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
613  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
614  */
615 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
616 
617 /**
618  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
619  * timestamp string.
620  *
621  * @param s AVFormatContext
622  * @return <0 on error
623  */
625 
626 #define CONTAINS_PAL 2
627 /**
628  * Reshuffles the lines to use the user specified stride.
629  *
630  * @param ppkt input and output packet
631  * @return negative error code or
632  * 0 if no new packet was allocated
633  * non-zero if a new packet was allocated and ppkt has to be freed
634  * CONTAINS_PAL if in addition to a new packet the old contained a palette
635  */
636 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
637 
638 /**
639  * Retrieves the palette from a packet, either from side data, or
640  * appended to the video data in the packet itself (raw video only).
641  * It is commonly used after a call to ff_reshuffle_raw_rgb().
642  *
643  * Use 0 for the ret parameter to check for side data only.
644  *
645  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
646  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
647  * @param palette pointer to palette buffer
648  * @return negative error code or
649  * 1 if the packet has a palette, else 0
650  */
651 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
652 
653 /**
654  * Finalize buf into extradata and set its size appropriately.
655  */
656 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
657 
658 /**
659  * Find the next packet in the interleaving queue for the given stream.
660  * The pkt parameter is filled in with the queued packet, including
661  * references to the data (which the caller is not allowed to keep or
662  * modify).
663  *
664  * @return 0 if a packet was found, a negative value if no packet was found
665  */
666 int ff_interleaved_peek(AVFormatContext *s, int stream,
667  AVPacket *pkt, int add_offset);
668 
669 #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:424
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:147
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:1186
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:163
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:299
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:3027
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:150
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:4581
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:1365
struct tm * ff_brktimegm(time_t secs, struct tm *tm)
Definition: cutils.c:31
The bitstream filter state.
Definition: avcodec.h:5738
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:3017
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:1966
#define src
Definition: vp8dsp.c:254
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3979
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:4338
Format I/O context.
Definition: avformat.h:1338
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:1871
char str[32]
Definition: internal.h:50
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1836
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:1885
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:1063
miscellaneous OS support macros and functions.
Query whether the feature is possible on this stream.
Definition: internal.h:572
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:5293
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:894
#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:1067
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5283
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:1412
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: utils.c:2009
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4037
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:3950
#define av_log(a,...)
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3285
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:4396
Callback for checking whether to abort blocking functions.
Definition: avio.h:50
int avctx_inited
1 if avctx has been initialized with the values from the codec parameters
Definition: internal.h:172
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:5300
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
const AVIOInterruptCB int_cb
Definition: ffmpeg.c:460
#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:966
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:4715
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5317
int64_t val
Definition: internal.h:62
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:4958
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:157
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4665
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:3190
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:4142
#define width
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:5326
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:776
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:3227
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:1898
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:99
int64_t den
Definition: internal.h:62
main external API structure.
Definition: avcodec.h:1682
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:524
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:2187
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:3039
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:5351
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:179
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:4553
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:2149
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:4611
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:414
int palette
Definition: v4l.c:61
Main libavformat public API header.
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:174
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:3211
unsigned bps
Definition: movenc.c:1413
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:566
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:5168
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:168
FILE * out
Definition: movenc.c:54
void INT64 start
Definition: avisynth_c.h:690
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:493
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:765
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4532
This structure stores compressed data.
Definition: avcodec.h:1584
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:2081
struct AVPacketList * raw_packet_buffer_end
Definition: internal.h:91
const char * name
Definition: opengl_enc.c:103