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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 
136  /**
137  * Set to 1 if the codec allows reordering, so pts can be different
138  * from dts.
139  */
140  int reorder;
141 
142  /**
143  * bitstream filters to run on stream
144  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
145  * - decoding: unused
146  */
148  int nb_bsfcs;
149 
150  /**
151  * Whether or not check_bitstream should still be run on each packet
152  */
154 
155  /**
156  * The codec context used by avformat_find_stream_info, the parser, etc.
157  */
159  /**
160  * 1 if avctx has been initialized with the values from the codec parameters
161  */
163 
165 
166  /**
167  * Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar)
168  */
170 };
171 
172 #ifdef __GNUC__
173 #define dynarray_add(tab, nb_ptr, elem)\
174 do {\
175  __typeof__(tab) _tab = (tab);\
176  __typeof__(elem) _elem = (elem);\
177  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
178  av_dynarray_add(_tab, nb_ptr, _elem);\
179 } while(0)
180 #else
181 #define dynarray_add(tab, nb_ptr, elem)\
182 do {\
183  av_dynarray_add((tab), nb_ptr, (elem));\
184 } while(0)
185 #endif
186 
187 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
188 
189 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
190 
191 /**
192  * Parse a string of hexadecimal strings. Any space between the hexadecimal
193  * digits is ignored.
194  *
195  * @param data if non-null, the parsed data is written to this pointer
196  * @param p the string to parse
197  * @return the number of bytes written (or to be written, if data is null)
198  */
199 int ff_hex_to_data(uint8_t *data, const char *p);
200 
201 /**
202  * Add packet to AVFormatContext->packet_buffer list, determining its
203  * interleaved position using compare() function argument.
204  * @return 0, or < 0 on error
205  */
207  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
208 
210 
211 #define NTP_OFFSET 2208988800ULL
212 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
213 
214 /** Get the current time since NTP epoch in microseconds. */
215 uint64_t ff_ntp_time(void);
216 
217 /**
218  * Append the media-specific SDP fragment for the media stream c
219  * to the buffer buff.
220  *
221  * Note, the buffer needs to be initialized, since it is appended to
222  * existing content.
223  *
224  * @param buff the buffer to append the SDP fragment to
225  * @param size the size of the buff buffer
226  * @param st the AVStream of the media to describe
227  * @param idx the global stream index
228  * @param dest_addr the destination address of the media stream, may be NULL
229  * @param dest_type the destination address type, may be NULL
230  * @param port the destination port of the media stream, 0 if unknown
231  * @param ttl the time to live of the stream, 0 if not multicast
232  * @param fmt the AVFormatContext, which might contain options modifying
233  * the generated SDP
234  */
235 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
236  const char *dest_addr, const char *dest_type,
237  int port, int ttl, AVFormatContext *fmt);
238 
239 /**
240  * Write a packet to another muxer than the one the user originally
241  * intended. Useful when chaining muxers, where one muxer internally
242  * writes a received packet to another muxer.
243  *
244  * @param dst the muxer to write the packet to
245  * @param dst_stream the stream index within dst to write the packet to
246  * @param pkt the packet to be written
247  * @param src the muxer the packet originally was intended for
248  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
249  * @return the value av_write_frame returned
250  */
251 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
253 
254 /**
255  * Get the length in bytes which is needed to store val as v.
256  */
257 int ff_get_v_length(uint64_t val);
258 
259 /**
260  * Put val using a variable number of bytes.
261  */
262 void ff_put_v(AVIOContext *bc, uint64_t val);
263 
264 /**
265  * Read a whole line of text from AVIOContext. Stop reading after reaching
266  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
267  * and may be truncated if the buffer is too small.
268  *
269  * @param s the read-only AVIOContext
270  * @param buf buffer to store the read line
271  * @param maxlen size of the buffer
272  * @return the length of the string written in the buffer, not including the
273  * final \\0
274  */
275 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
276 
277 #define SPACE_CHARS " \t\r\n"
278 
279 /**
280  * Callback function type for ff_parse_key_value.
281  *
282  * @param key a pointer to the key
283  * @param key_len the number of bytes that belong to the key, including the '='
284  * char
285  * @param dest return the destination pointer for the value in *dest, may
286  * be null to ignore the value
287  * @param dest_len the length of the *dest buffer
288  */
289 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
290  int key_len, char **dest, int *dest_len);
291 /**
292  * Parse a string with comma-separated key=value pairs. The value strings
293  * may be quoted and may contain escaped characters within quoted strings.
294  *
295  * @param str the string to parse
296  * @param callback_get_buf function that returns where to store the
297  * unescaped value string.
298  * @param context the opaque context pointer to pass to callback_get_buf
299  */
300 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
301  void *context);
302 
303 /**
304  * Find stream index based on format-specific stream ID
305  * @return stream index, or < 0 on error
306  */
307 int ff_find_stream_index(AVFormatContext *s, int id);
308 
309 /**
310  * Internal version of av_index_search_timestamp
311  */
312 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
313  int64_t wanted_timestamp, int flags);
314 
315 /**
316  * Internal version of av_add_index_entry
317  */
318 int ff_add_index_entry(AVIndexEntry **index_entries,
319  int *nb_index_entries,
320  unsigned int *index_entries_allocated_size,
321  int64_t pos, int64_t timestamp, int size, int distance, int flags);
322 
323 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
324 
325 /**
326  * Add a new chapter.
327  *
328  * @param s media file handle
329  * @param id unique ID for this chapter
330  * @param start chapter start time in time_base units
331  * @param end chapter end time in time_base units
332  * @param title chapter title
333  *
334  * @return AVChapter or NULL on error
335  */
337  int64_t start, int64_t end, const char *title);
338 
339 /**
340  * Ensure the index uses less memory than the maximum specified in
341  * AVFormatContext.max_index_size by discarding entries if it grows
342  * too large.
343  */
344 void ff_reduce_index(AVFormatContext *s, int stream_index);
345 
346 enum AVCodecID ff_guess_image2_codec(const char *filename);
347 
348 /**
349  * Perform a binary search using av_index_search_timestamp() and
350  * AVInputFormat.read_timestamp().
351  *
352  * @param target_ts target timestamp in the time base of the given stream
353  * @param stream_index stream number
354  */
355 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
356  int64_t target_ts, int flags);
357 
358 /**
359  * Update cur_dts of all streams based on the given timestamp and AVStream.
360  *
361  * Stream ref_st unchanged, others set cur_dts in their native time base.
362  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
363  * @param timestamp new dts expressed in time_base of param ref_st
364  * @param ref_st reference stream giving time_base of param timestamp
365  */
366 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
367 
368 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
369  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
370 
371 /**
372  * Perform a binary search using read_timestamp().
373  *
374  * @param target_ts target timestamp in the time base of the given stream
375  * @param stream_index stream number
376  */
377 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
378  int64_t target_ts, int64_t pos_min,
379  int64_t pos_max, int64_t pos_limit,
380  int64_t ts_min, int64_t ts_max,
381  int flags, int64_t *ts_ret,
382  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
383 
384 /**
385  * Set the time base and wrapping info for a given stream. This will be used
386  * to interpret the stream's timestamps. If the new time base is invalid
387  * (numerator or denominator are non-positive), it leaves the stream
388  * unchanged.
389  *
390  * @param s stream
391  * @param pts_wrap_bits number of bits effectively used by the pts
392  * (used for wrap control)
393  * @param pts_num time base numerator
394  * @param pts_den time base denominator
395  */
396 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
397  unsigned int pts_num, unsigned int pts_den);
398 
399 /**
400  * Add side data to a packet for changing parameters to the given values.
401  * Parameters set to 0 aren't included in the change.
402  */
403 int ff_add_param_change(AVPacket *pkt, int32_t channels,
404  uint64_t channel_layout, int32_t sample_rate,
406 
407 /**
408  * Set the timebase for each stream from the corresponding codec timebase and
409  * print it.
410  */
412 
413 /**
414  * Read a transport packet from a media file.
415  *
416  * @param s media file handle
417  * @param pkt is filled
418  * @return 0 if OK, AVERROR_xxx on error
419  */
421 
422 /**
423  * Interleave a packet per dts in an output media file.
424  *
425  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
426  * function, so they cannot be used after it. Note that calling av_packet_unref()
427  * on them is still safe.
428  *
429  * @param s media file handle
430  * @param out the interleaved packet will be output here
431  * @param pkt the input packet
432  * @param flush 1 if no further packets are available as input and all
433  * remaining packets should be output
434  * @return 1 if a packet was output, 0 if no packet could be output,
435  * < 0 if an error occurred
436  */
438  AVPacket *pkt, int flush);
439 
441 
442 /**
443  * Return the frame duration in seconds. Return 0 if not available.
444  */
445 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
446  AVCodecParserContext *pc, AVPacket *pkt);
447 
448 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
449 
450 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
451 
452 /**
453  * Select a PCM codec based on the given parameters.
454  *
455  * @param bps bits-per-sample
456  * @param flt floating-point
457  * @param be big-endian
458  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
459  * e.g. the 1st bit indicates if 8-bit should be signed or
460  * unsigned, the 2nd bit indicates if 16-bit should be signed or
461  * unsigned, etc... This is useful for formats such as WAVE where
462  * only 8-bit is unsigned and all other bit depths are signed.
463  * @return a PCM codec id or AV_CODEC_ID_NONE
464  */
465 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
466 
467 /**
468  * Chooses a timebase for muxing the specified stream.
469  *
470  * The chosen timebase allows sample accurate timestamps based
471  * on the framerate or sample rate for audio streams. It also is
472  * at least as precise as 1/min_precision would be.
473  */
474 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
475 
476 /**
477  * Chooses a timebase for muxing the specified stream.
478  */
480 
481 /**
482  * Generate standard extradata for AVC-Intra based on width/height and field
483  * order.
484  */
486 
487 /**
488  * Add a bitstream filter to a stream.
489  *
490  * @param st output stream to add a filter to
491  * @param name the name of the filter to add
492  * @param args filter-specific argument string
493  * @return >0 on success;
494  * AVERROR code on failure
495  */
496 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
497 
498 /**
499  * Copy encoding parameters from source to destination stream
500  *
501  * @param dst pointer to destination AVStream
502  * @param src pointer to source AVStream
503  * @return >=0 on success, AVERROR code on error
504  */
506 
507 /**
508  * Wrap errno on rename() error.
509  *
510  * @param oldpath source path
511  * @param newpath destination path
512  * @return 0 or AVERROR on failure
513  */
514 static inline int ff_rename(const char *oldpath, const char *newpath, void *logctx)
515 {
516  int ret = 0;
517  if (rename(oldpath, newpath) == -1) {
518  ret = AVERROR(errno);
519  if (logctx)
520  av_log(logctx, AV_LOG_ERROR, "failed to rename file %s to %s\n", oldpath, newpath);
521  }
522  return ret;
523 }
524 
525 /**
526  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
527  * which is always set to 0.
528  *
529  * @param size size of extradata
530  * @return 0 if OK, AVERROR_xxx on error
531  */
533 
534 /**
535  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
536  * which is always set to 0 and fill it from pb.
537  *
538  * @param size size of extradata
539  * @return >= 0 if OK, AVERROR_xxx on error
540  */
542 
543 /**
544  * add frame for rfps calculation.
545  *
546  * @param dts timestamp of the i-th frame
547  * @return 0 if OK, AVERROR_xxx on error
548  */
549 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
550 
552 
553 /**
554  * Flags for AVFormatContext.write_uncoded_frame()
555  */
557 
558  /**
559  * Query whether the feature is possible on this stream.
560  * The frame argument is ignored.
561  */
563 
564 };
565 
566 /**
567  * Copies the whilelists from one context to the other
568  */
570 
571 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
573 
574 /**
575  * Returned by demuxers to indicate that data was consumed but discarded
576  * (ignored streams or junk data). The framework will re-call the demuxer.
577  */
578 #define FFERROR_REDO FFERRTAG('R','E','D','O')
579 
580 /**
581  * Utility function to open IO stream of output format.
582  *
583  * @param s AVFormatContext
584  * @param url URL or file name to open for writing
585  * @options optional options which will be passed to io_open callback
586  * @return >=0 on success, negative AVERROR in case of failure
587  */
588 int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options);
589 
590 /*
591  * A wrapper around AVFormatContext.io_close that should be used
592  * instead of calling the pointer directly.
593  */
595 
596 /**
597  * Parse creation_time in AVFormatContext metadata if exists and warn if the
598  * parsing fails.
599  *
600  * @param s AVFormatContext
601  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
602  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
603  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
604  */
605 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
606 
607 /**
608  * Standardize creation_time metadata in AVFormatContext to an ISO-8601
609  * timestamp string.
610  *
611  * @param s AVFormatContext
612  * @return <0 on error
613  */
615 
616 #define CONTAINS_PAL 2
617 /**
618  * Reshuffles the lines to use the user specified stride.
619  *
620  * @param ppkt input and output packet
621  * @return negative error code or
622  * 0 if no new packet was allocated
623  * non-zero if a new packet was allocated and ppkt has to be freed
624  * CONTAINS_PAL if in addition to a new packet the old contained a palette
625  */
626 int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride);
627 
628 /**
629  * Retrieves the palette from a packet, either from side data, or
630  * appended to the video data in the packet itself (raw video only).
631  * It is commonly used after a call to ff_reshuffle_raw_rgb().
632  *
633  * Use 0 for the ret parameter to check for side data only.
634  *
635  * @param pkt pointer to packet before calling ff_reshuffle_raw_rgb()
636  * @param ret return value from ff_reshuffle_raw_rgb(), or 0
637  * @param palette pointer to palette buffer
638  * @return negative error code or
639  * 1 if the packet has a palette, else 0
640  */
641 int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette);
642 
643 /**
644  * Finalize buf into extradata and set its size appropriately.
645  */
646 int ff_bprint_to_codecpar_extradata(AVCodecParameters *par, struct AVBPrint *buf);
647 
648 /**
649  * Find the next packet in the interleaving queue for the given stream.
650  * The packet is not removed from the interleaving queue, but only
651  * a pointer to it is returned.
652  *
653  * @param ts_offset the ts difference between packet in the que and the muxer.
654  *
655  * @return a pointer to the next packet, or NULL if no packet is queued
656  * for this stream.
657  */
658 const AVPacket *ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset);
659 
660 #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
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:153
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:289
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:3002
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:140
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:4549
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:1318
struct tm * ff_brktimegm(time_t secs, struct tm *tm)
Definition: cutils.c:31
The bitstream filter state.
Definition: avcodec.h:5727
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:2992
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:1954
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3961
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:4306
Format I/O context.
Definition: avformat.h:1330
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:1859
char str[32]
Definition: internal.h:50
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1824
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:1873
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:562
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:5244
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:888
#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:1031
int ff_format_output_open(AVFormatContext *s, const char *url, AVDictionary **options)
Utility function to open IO stream of output format.
Definition: utils.c:5234
int header_written
Whether or not a header has already been written.
Definition: internal.h:126
uint32_t tag
Definition: movenc.c:1377
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: utils.c:1997
int ff_stream_encode_params_copy(AVStream *dst, const AVStream *src)
Copy encoding parameters from source to destination stream.
Definition: utils.c:4005
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:3969
#define av_log(a,...)
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3260
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:4364
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:162
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:5251
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:457
#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:930
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:4683
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5268
int64_t val
Definition: internal.h:62
static float distance(float x, float y, int band)
int ff_generate_avci_extradata(AVStream *st)
Generate standard extradata for AVC-Intra based on width/height and field order.
Definition: utils.c:4926
AVBSFContext ** bsfcs
bitstream filters to run on stream
Definition: internal.h:147
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4633
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:3165
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:4110
#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:5277
int32_t
int64_t num
Definition: internal.h:62
#define src
Definition: vp9dsp.c:530
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:770
Stream structure.
Definition: avformat.h:881
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts)
add frame for rfps calculation.
Definition: utils.c:3202
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:1886
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:1675
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:514
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:2175
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:3014
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:5302
int need_context_update
Whether the internal avctx needs to be updated from codecpar (after a late change to codecpar) ...
Definition: internal.h:169
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:4521
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:2137
static int flags
Definition: cpu.c:47
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:4579
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:164
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:3186
unsigned bps
Definition: movenc.c:1378
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:556
struct AVPacketList * packet_buffer_end
Definition: internal.h:79
const AVPacket * ff_interleaved_peek(AVFormatContext *s, int stream, int64_t *ts_offset)
Find the next packet in the interleaving queue for the given stream.
Definition: mux.c:1150
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:5119
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:158
FILE * out
Definition: movenc.c:54
void INT64 start
Definition: avisynth_c.h:690
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:478
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:4500
This structure stores compressed data.
Definition: avcodec.h:1577
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:2069
struct AVPacketList * raw_packet_buffer_end
Definition: internal.h:91
const char * name
Definition: opengl_enc.c:103