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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 
151  /**
152  * Set to 1 if the codec allows reordering, so pts can be different
153  * from dts.
154  */
155  int reorder;
156 
157  /**
158  * bitstream filters to run on stream
159  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
160  * - decoding: unused
161  */
163  int nb_bsfcs;
164 
165  /**
166  * Whether or not check_bitstream should still be run on each packet
167  */
169 
170  /**
171  * The codec context used by avformat_find_stream_info, the parser, etc.
172  */
174  /**
175  * 1 if avctx has been initialized with the values from the codec parameters
176  */
178 
180 
181  /**
182  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
183  */
185 };
186 
187 #ifdef __GNUC__
188 #define dynarray_add(tab, nb_ptr, elem)\
189 do {\
190  __typeof__(tab) _tab = (tab);\
191  __typeof__(elem) _elem = (elem);\
192  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
193  av_dynarray_add(_tab, nb_ptr, _elem);\
194 } while(0)
195 #else
196 #define dynarray_add(tab, nb_ptr, elem)\
197 do {\
198  av_dynarray_add((tab), nb_ptr, (elem));\
199 } while(0)
200 #endif
201 
202 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
203 
204 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
205 
206 /**
207  * Parse a string of hexadecimal strings. Any space between the hexadecimal
208  * digits is ignored.
209  *
210  * @param data if non-null, the parsed data is written to this pointer
211  * @param p the string to parse
212  * @return the number of bytes written (or to be written, if data is null)
213  */
214 int ff_hex_to_data(uint8_t *data, const char *p);
215 
216 /**
217  * Add packet to AVFormatContext->packet_buffer list, determining its
218  * interleaved position using compare() function argument.
219  * @return 0, or < 0 on error
220  */
222  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
223 
225 
226 #define NTP_OFFSET 2208988800ULL
227 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
228 
229 /** Get the current time since NTP epoch in microseconds. */
230 uint64_t ff_ntp_time(void);
231 
232 /**
233  * Append the media-specific SDP fragment for the media stream c
234  * to the buffer buff.
235  *
236  * Note, the buffer needs to be initialized, since it is appended to
237  * existing content.
238  *
239  * @param buff the buffer to append the SDP fragment to
240  * @param size the size of the buff buffer
241  * @param st the AVStream of the media to describe
242  * @param idx the global stream index
243  * @param dest_addr the destination address of the media stream, may be NULL
244  * @param dest_type the destination address type, may be NULL
245  * @param port the destination port of the media stream, 0 if unknown
246  * @param ttl the time to live of the stream, 0 if not multicast
247  * @param fmt the AVFormatContext, which might contain options modifying
248  * the generated SDP
249  */
250 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
251  const char *dest_addr, const char *dest_type,
252  int port, int ttl, AVFormatContext *fmt);
253 
254 /**
255  * Write a packet to another muxer than the one the user originally
256  * intended. Useful when chaining muxers, where one muxer internally
257  * writes a received packet to another muxer.
258  *
259  * @param dst the muxer to write the packet to
260  * @param dst_stream the stream index within dst to write the packet to
261  * @param pkt the packet to be written
262  * @param src the muxer the packet originally was intended for
263  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
264  * @return the value av_write_frame returned
265  */
266 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
268 
269 /**
270  * Get the length in bytes which is needed to store val as v.
271  */
272 int ff_get_v_length(uint64_t val);
273 
274 /**
275  * Put val using a variable number of bytes.
276  */
277 void ff_put_v(AVIOContext *bc, uint64_t val);
278 
279 /**
280  * Read a whole line of text from AVIOContext. Stop reading after reaching
281  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
282  * and may be truncated if the buffer is too small.
283  *
284  * @param s the read-only AVIOContext
285  * @param buf buffer to store the read line
286  * @param maxlen size of the buffer
287  * @return the length of the string written in the buffer, not including the
288  * final \\0
289  */
290 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
291 
292 #define SPACE_CHARS " \t\r\n"
293 
294 /**
295  * Callback function type for ff_parse_key_value.
296  *
297  * @param key a pointer to the key
298  * @param key_len the number of bytes that belong to the key, including the '='
299  * char
300  * @param dest return the destination pointer for the value in *dest, may
301  * be null to ignore the value
302  * @param dest_len the length of the *dest buffer
303  */
304 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
305  int key_len, char **dest, int *dest_len);
306 /**
307  * Parse a string with comma-separated key=value pairs. The value strings
308  * may be quoted and may contain escaped characters within quoted strings.
309  *
310  * @param str the string to parse
311  * @param callback_get_buf function that returns where to store the
312  * unescaped value string.
313  * @param context the opaque context pointer to pass to callback_get_buf
314  */
315 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
316  void *context);
317 
318 /**
319  * Find stream index based on format-specific stream ID
320  * @return stream index, or < 0 on error
321  */
322 int ff_find_stream_index(AVFormatContext *s, int id);
323 
324 /**
325  * Internal version of av_index_search_timestamp
326  */
327 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
328  int64_t wanted_timestamp, int flags);
329 
330 /**
331  * Internal version of av_add_index_entry
332  */
333 int ff_add_index_entry(AVIndexEntry **index_entries,
334  int *nb_index_entries,
335  unsigned int *index_entries_allocated_size,
336  int64_t pos, int64_t timestamp, int size, int distance, int flags);
337 
338 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
339 
340 /**
341  * Add a new chapter.
342  *
343  * @param s media file handle
344  * @param id unique ID for this chapter
345  * @param start chapter start time in time_base units
346  * @param end chapter end time in time_base units
347  * @param title chapter title
348  *
349  * @return AVChapter or NULL on error
350  */
352  int64_t start, int64_t end, const char *title);
353 
354 /**
355  * Ensure the index uses less memory than the maximum specified in
356  * AVFormatContext.max_index_size by discarding entries if it grows
357  * too large.
358  */
359 void ff_reduce_index(AVFormatContext *s, int stream_index);
360 
361 enum AVCodecID ff_guess_image2_codec(const char *filename);
362 
363 /**
364  * Perform a binary search using av_index_search_timestamp() and
365  * AVInputFormat.read_timestamp().
366  *
367  * @param target_ts target timestamp in the time base of the given stream
368  * @param stream_index stream number
369  */
370 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
371  int64_t target_ts, int flags);
372 
373 /**
374  * Update cur_dts of all streams based on the given timestamp and AVStream.
375  *
376  * Stream ref_st unchanged, others set cur_dts in their native time base.
377  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
378  * @param timestamp new dts expressed in time_base of param ref_st
379  * @param ref_st reference stream giving time_base of param timestamp
380  */
381 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
382 
383 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
384  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
385 
386 /**
387  * Perform a binary search using read_timestamp().
388  *
389  * @param target_ts target timestamp in the time base of the given stream
390  * @param stream_index stream number
391  */
392 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
393  int64_t target_ts, int64_t pos_min,
394  int64_t pos_max, int64_t pos_limit,
395  int64_t ts_min, int64_t ts_max,
396  int flags, int64_t *ts_ret,
397  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
398 
399 /**
400  * Set the time base and wrapping info for a given stream. This will be used
401  * to interpret the stream's timestamps. If the new time base is invalid
402  * (numerator or denominator are non-positive), it leaves the stream
403  * unchanged.
404  *
405  * @param s stream
406  * @param pts_wrap_bits number of bits effectively used by the pts
407  * (used for wrap control)
408  * @param pts_num time base numerator
409  * @param pts_den time base denominator
410  */
411 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
412  unsigned int pts_num, unsigned int pts_den);
413 
414 /**
415  * Add side data to a packet for changing parameters to the given values.
416  * Parameters set to 0 aren't included in the change.
417  */
418 int ff_add_param_change(AVPacket *pkt, int32_t channels,
419  uint64_t channel_layout, int32_t sample_rate,
421 
422 /**
423  * Set the timebase for each stream from the corresponding codec timebase and
424  * print it.
425  */
427 
428 /**
429  * Read a transport packet from a media file.
430  *
431  * @param s media file handle
432  * @param pkt is filled
433  * @return 0 if OK, AVERROR_xxx on error
434  */
436 
437 /**
438  * Interleave a packet per dts in an output media file.
439  *
440  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
441  * function, so they cannot be used after it. Note that calling av_packet_unref()
442  * on them is still safe.
443  *
444  * @param s media file handle
445  * @param out the interleaved packet will be output here
446  * @param pkt the input packet
447  * @param flush 1 if no further packets are available as input and all
448  * remaining packets should be output
449  * @return 1 if a packet was output, 0 if no packet could be output,
450  * < 0 if an error occurred
451  */
453  AVPacket *pkt, int flush);
454 
456 
457 /**
458  * Return the frame duration in seconds. Return 0 if not available.
459  */
460 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
461  AVCodecParserContext *pc, AVPacket *pkt);
462 
463 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
464 
465 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
466 
467 /**
468  * Select a PCM codec based on the given parameters.
469  *
470  * @param bps bits-per-sample
471  * @param flt floating-point
472  * @param be big-endian
473  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
474  * e.g. the 1st bit indicates if 8-bit should be signed or
475  * unsigned, the 2nd bit indicates if 16-bit should be signed or
476  * unsigned, etc... This is useful for formats such as WAVE where
477  * only 8-bit is unsigned and all other bit depths are signed.
478  * @return a PCM codec id or AV_CODEC_ID_NONE
479  */
480 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
481 
482 /**
483  * Chooses a timebase for muxing the specified stream.
484  *
485  * The chosen timebase allows sample accurate timestamps based
486  * on the framerate or sample rate for audio streams. It also is
487  * at least as precise as 1/min_precision would be.
488  */
489 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
490 
491 /**
492  * Chooses a timebase for muxing the specified stream.
493  */
495 
496 /**
497  * Generate standard extradata for AVC-Intra based on width/height and field
498  * order.
499  */
501 
502 /**
503  * Add a bitstream filter to a stream.
504  *
505  * @param st output stream to add a filter to
506  * @param name the name of the filter to add
507  * @param args filter-specific argument string
508  * @return >0 on success;
509  * AVERROR code on failure
510  */
511 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
512 
513 /**
514  * Copy encoding parameters from source to destination stream
515  *
516  * @param dst pointer to destination AVStream
517  * @param src pointer to source AVStream
518  * @return >=0 on success, AVERROR code on error
519  */
521 
522 /**
523  * Wrap errno on rename() error.
524  *
525  * @param oldpath source path
526  * @param newpath destination path
527  * @return 0 or AVERROR on failure
528  */
529 static inline int ff_rename(const char *oldpath, const char *newpath, void *logctx)
530 {
531  int ret = 0;
532  if (rename(oldpath, newpath) == -1) {
533  ret = AVERROR(errno);
534  if (logctx)
535  av_log(logctx, AV_LOG_ERROR, "failed to rename file %s to %s\n", oldpath, newpath);
536  }
537  return ret;
538 }
539 
540 /**
541  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
542  * which is always set to 0.
543  *
544  * @param size size of extradata
545  * @return 0 if OK, AVERROR_xxx on error
546  */
548 
549 /**
550  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
551  * which is always set to 0 and fill it from pb.
552  *
553  * @param size size of extradata
554  * @return >= 0 if OK, AVERROR_xxx on error
555  */
557 
558 /**
559  * add frame for rfps calculation.
560  *
561  * @param dts timestamp of the i-th frame
562  * @return 0 if OK, AVERROR_xxx on error
563  */
564 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
565 
567 
568 /**
569  * Flags for AVFormatContext.write_uncoded_frame()
570  */
572 
573  /**
574  * Query whether the feature is possible on this stream.
575  * The frame argument is ignored.
576  */
578 
579 };
580 
581 /**
582  * Copies the whilelists from one context to the other
583  */
585 
586 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
588 
589 /**
590  * Returned by demuxers to indicate that data was consumed but discarded
591  * (ignored streams or junk data). The framework will re-call the demuxer.
592  */
593 #define FFERROR_REDO FFERRTAG('R','E','D','O')
594 
595 /**
596  * Utility function to open IO stream of output format.
597  *
598  * @param s AVFormatContext
599  * @param url URL or file name to open for writing
600  * @options optional options which will be passed to io_open callback
601  * @return >=0 on success, negative AVERROR in case of failure
602  */
603 int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options);
604 
605 /*
606  * A wrapper around AVFormatContext.io_close that should be used
607  * instead of calling the pointer directly.
608  */
610 
611 /**
612  * Parse creation_time in AVFormatContext metadata if exists and warn if the
613  * parsing fails.
614  *
615  * @param s AVFormatContext
616  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
617  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
618  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
619  */
620 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
621 
622 /**
623  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
624  * timestamp string.
625  *
626  * @param s AVFormatContext
627  * @return <0 on error
628  */
630 
631 #define CONTAINS_PAL 2
632 /**
633  * Reshuffles the lines to use the user specified stride.
634  *
635  * @param ppkt input and output packet
636  * @return negative error code or
637  * 0 if no new packet was allocated
638  * non-zero if a new packet was allocated and ppkt has to be freed
639  * CONTAINS_PAL if in addition to a new packet the old contained a palette
640  */
641 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
642 
643 /**
644  * Retrieves the palette from a packet, either from side data, or
645  * appended to the video data in the packet itself (raw video only).
646  * It is commonly used after a call to ff_reshuffle_raw_rgb().
647  *
648  * Use 0 for the ret parameter to check for side data only.
649  *
650  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
651  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
652  * @param palette pointer to palette buffer
653  * @return negative error code or
654  * 1 if the packet has a palette, else 0
655  */
656 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
657 
658 /**
659  * Finalize buf into extradata and set its size appropriately.
660  */
661 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
662 
663 /**
664  * Find the next packet in the interleaving queue for the given stream.
665  * The pkt parameter is filled in with the queued packet, including
666  * references to the data (which the caller is not allowed to keep or
667  * modify).
668  *
669  * @return 0 if a packet was found, a negative value if no packet was found
670  */
671 int ff_interleaved_peek(AVFormatContext *s, int stream,
672  AVPacket *pkt, int add_offset);
673 
674 #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:434
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:155
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:1198
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:168
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:304
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:3049
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:155
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:4607
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:1377
struct tm * ff_brktimegm(time_t secs, struct tm *tm)
Definition: cutils.c:31
The bitstream filter state.
Definition: avcodec.h:5815
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:3039
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:1988
#define src
Definition: vp8dsp.c:254
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4048
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:4364
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:1893
char str[32]
Definition: internal.h:50
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1858
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:1907
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:1083
miscellaneous OS support macros and functions.
Query whether the feature is possible on this stream.
Definition: internal.h:577
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:5319
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:909
#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:1079
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5309
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:2031
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4059
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:3307
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:4422
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:177
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:5326
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:461
#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:978
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:4741
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5343
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:4984
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:162
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4691
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:3212
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:4164
#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:5352
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:3249
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:1920
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:100
int64_t den
Definition: internal.h:62
main external API structure.
Definition: avcodec.h:1722
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:529
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:2209
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:3061
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:5377
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:184
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:4579
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:2171
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:4637
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:424
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:179
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:3233
unsigned bps
Definition: movenc.c:1413
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:571
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:5194
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:173
FILE * out
Definition: movenc.c:54
void INT64 start
Definition: avisynth_c.h:690
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:494
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:775
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4558
This structure stores compressed data.
Definition: avcodec.h:1624
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:2103
struct AVPacketList * raw_packet_buffer_end
Definition: internal.h:91
const char * name
Definition: opengl_enc.c:103