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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 #include "avformat.h"
26 #include "os_support.h"
27 
28 #define MAX_URL_SIZE 4096
29 
30 /** size of probe buffer, for guessing file type from file contents */
31 #define PROBE_BUF_MIN 2048
32 #define PROBE_BUF_MAX (1 << 20)
33 
34 #define MAX_PROBE_PACKETS 2500
35 
36 #ifdef DEBUG
37 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
38 #else
39 # define hex_dump_debug(class, buf, size) do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
40 #endif
41 
42 typedef struct AVCodecTag {
43  enum AVCodecID id;
44  unsigned int tag;
45 } AVCodecTag;
46 
47 typedef struct CodecMime{
48  char str[32];
49  enum AVCodecID id;
50 } CodecMime;
51 
52 /*************************************************/
53 /* fractional numbers for exact pts handling */
54 
55 /**
56  * The exact value of the fractional number is: 'val + num / den'.
57  * num is assumed to be 0 <= num < den.
58  */
59 typedef struct FFFrac {
60  int64_t val, num, den;
61 } FFFrac;
62 
63 
65  /**
66  * Number of streams relevant for interleaving.
67  * Muxing only.
68  */
70 
71  /**
72  * This buffer is only needed when packets were already buffered but
73  * not decoded, for example to get the codec parameters in MPEG
74  * streams.
75  */
78 
79  /* av_seek_frame() support */
80  int64_t data_offset; /**< offset of the first packet */
81 
82  /**
83  * Raw packets from the demuxer, prior to parsing and decoding.
84  * This buffer is used for buffering packets until the codec can
85  * be identified, as parsing cannot be done without knowing the
86  * codec.
87  */
90  /**
91  * Packets split by the parser get queued here.
92  */
95  /**
96  * Remaining size available for raw_packet_buffer, in bytes.
97  */
98 #define RAW_PACKET_BUFFER_SIZE 2500000
100 
101  /**
102  * Offset to remap timestamps to be non-negative.
103  * Expressed in timebase units.
104  * @see AVStream.mux_ts_offset
105  */
106  int64_t offset;
107 
108  /**
109  * Timebase for the timestamp offset.
110  */
112 
113 #if FF_API_COMPUTE_PKT_FIELDS2
114  int missing_ts_warning;
115 #endif
116 
118 
120 
121  /**
122  * Whether or not a header has already been written
123  */
125 };
126 
128  /**
129  * Set to 1 if the codec allows reordering, so pts can be different
130  * from dts.
131  */
132  int reorder;
133 
134  /**
135  * bitstream filter to run on stream
136  * - encoding: Set by muxer using ff_stream_add_bitstream_filter
137  * - decoding: unused
138  */
140 
141  /**
142  * Whether or not check_bitstream should still be run on each packet
143  */
145 };
146 
147 #ifdef __GNUC__
148 #define dynarray_add(tab, nb_ptr, elem)\
149 do {\
150  __typeof__(tab) _tab = (tab);\
151  __typeof__(elem) _elem = (elem);\
152  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
153  av_dynarray_add(_tab, nb_ptr, _elem);\
154 } while(0)
155 #else
156 #define dynarray_add(tab, nb_ptr, elem)\
157 do {\
158  av_dynarray_add((tab), nb_ptr, (elem));\
159 } while(0)
160 #endif
161 
162 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
163 
164 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
165 
166 /**
167  * Parse a string of hexadecimal strings. Any space between the hexadecimal
168  * digits is ignored.
169  *
170  * @param data if non-null, the parsed data is written to this pointer
171  * @param p the string to parse
172  * @return the number of bytes written (or to be written, if data is null)
173  */
174 int ff_hex_to_data(uint8_t *data, const char *p);
175 
176 /**
177  * Add packet to AVFormatContext->packet_buffer list, determining its
178  * interleaved position using compare() function argument.
179  * @return 0, or < 0 on error
180  */
182  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
183 
185 
186 #define NTP_OFFSET 2208988800ULL
187 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
188 
189 /** Get the current time since NTP epoch in microseconds. */
190 uint64_t ff_ntp_time(void);
191 
192 /**
193  * Append the media-specific SDP fragment for the media stream c
194  * to the buffer buff.
195  *
196  * Note, the buffer needs to be initialized, since it is appended to
197  * existing content.
198  *
199  * @param buff the buffer to append the SDP fragment to
200  * @param size the size of the buff buffer
201  * @param st the AVStream of the media to describe
202  * @param idx the global stream index
203  * @param dest_addr the destination address of the media stream, may be NULL
204  * @param dest_type the destination address type, may be NULL
205  * @param port the destination port of the media stream, 0 if unknown
206  * @param ttl the time to live of the stream, 0 if not multicast
207  * @param fmt the AVFormatContext, which might contain options modifying
208  * the generated SDP
209  */
210 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
211  const char *dest_addr, const char *dest_type,
212  int port, int ttl, AVFormatContext *fmt);
213 
214 /**
215  * Write a packet to another muxer than the one the user originally
216  * intended. Useful when chaining muxers, where one muxer internally
217  * writes a received packet to another muxer.
218  *
219  * @param dst the muxer to write the packet to
220  * @param dst_stream the stream index within dst to write the packet to
221  * @param pkt the packet to be written
222  * @param src the muxer the packet originally was intended for
223  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
224  * @return the value av_write_frame returned
225  */
226 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
228 
229 /**
230  * Get the length in bytes which is needed to store val as v.
231  */
232 int ff_get_v_length(uint64_t val);
233 
234 /**
235  * Put val using a variable number of bytes.
236  */
237 void ff_put_v(AVIOContext *bc, uint64_t val);
238 
239 /**
240  * Read a whole line of text from AVIOContext. Stop reading after reaching
241  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
242  * and may be truncated if the buffer is too small.
243  *
244  * @param s the read-only AVIOContext
245  * @param buf buffer to store the read line
246  * @param maxlen size of the buffer
247  * @return the length of the string written in the buffer, not including the
248  * final \\0
249  */
250 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
251 
252 #define SPACE_CHARS " \t\r\n"
253 
254 /**
255  * Callback function type for ff_parse_key_value.
256  *
257  * @param key a pointer to the key
258  * @param key_len the number of bytes that belong to the key, including the '='
259  * char
260  * @param dest return the destination pointer for the value in *dest, may
261  * be null to ignore the value
262  * @param dest_len the length of the *dest buffer
263  */
264 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
265  int key_len, char **dest, int *dest_len);
266 /**
267  * Parse a string with comma-separated key=value pairs. The value strings
268  * may be quoted and may contain escaped characters within quoted strings.
269  *
270  * @param str the string to parse
271  * @param callback_get_buf function that returns where to store the
272  * unescaped value string.
273  * @param context the opaque context pointer to pass to callback_get_buf
274  */
275 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
276  void *context);
277 
278 /**
279  * Find stream index based on format-specific stream ID
280  * @return stream index, or < 0 on error
281  */
282 int ff_find_stream_index(AVFormatContext *s, int id);
283 
284 /**
285  * Internal version of av_index_search_timestamp
286  */
287 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
288  int64_t wanted_timestamp, int flags);
289 
290 /**
291  * Internal version of av_add_index_entry
292  */
293 int ff_add_index_entry(AVIndexEntry **index_entries,
294  int *nb_index_entries,
295  unsigned int *index_entries_allocated_size,
296  int64_t pos, int64_t timestamp, int size, int distance, int flags);
297 
298 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
299 
300 /**
301  * Add a new chapter.
302  *
303  * @param s media file handle
304  * @param id unique ID for this chapter
305  * @param start chapter start time in time_base units
306  * @param end chapter end time in time_base units
307  * @param title chapter title
308  *
309  * @return AVChapter or NULL on error
310  */
312  int64_t start, int64_t end, const char *title);
313 
314 /**
315  * Ensure the index uses less memory than the maximum specified in
316  * AVFormatContext.max_index_size by discarding entries if it grows
317  * too large.
318  */
319 void ff_reduce_index(AVFormatContext *s, int stream_index);
320 
321 enum AVCodecID ff_guess_image2_codec(const char *filename);
322 
323 /**
324  * Perform a binary search using av_index_search_timestamp() and
325  * AVInputFormat.read_timestamp().
326  *
327  * @param target_ts target timestamp in the time base of the given stream
328  * @param stream_index stream number
329  */
330 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
331  int64_t target_ts, int flags);
332 
333 /**
334  * Update cur_dts of all streams based on the given timestamp and AVStream.
335  *
336  * Stream ref_st unchanged, others set cur_dts in their native time base.
337  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
338  * @param timestamp new dts expressed in time_base of param ref_st
339  * @param ref_st reference stream giving time_base of param timestamp
340  */
341 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
342 
343 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
344  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
345 
346 /**
347  * Perform a binary search using read_timestamp().
348  *
349  * @param target_ts target timestamp in the time base of the given stream
350  * @param stream_index stream number
351  */
352 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
353  int64_t target_ts, int64_t pos_min,
354  int64_t pos_max, int64_t pos_limit,
355  int64_t ts_min, int64_t ts_max,
356  int flags, int64_t *ts_ret,
357  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
358 
359 /**
360  * Set the time base and wrapping info for a given stream. This will be used
361  * to interpret the stream's timestamps. If the new time base is invalid
362  * (numerator or denominator are non-positive), it leaves the stream
363  * unchanged.
364  *
365  * @param s stream
366  * @param pts_wrap_bits number of bits effectively used by the pts
367  * (used for wrap control)
368  * @param pts_num time base numerator
369  * @param pts_den time base denominator
370  */
371 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
372  unsigned int pts_num, unsigned int pts_den);
373 
374 /**
375  * Add side data to a packet for changing parameters to the given values.
376  * Parameters set to 0 aren't included in the change.
377  */
378 int ff_add_param_change(AVPacket *pkt, int32_t channels,
379  uint64_t channel_layout, int32_t sample_rate,
381 
382 /**
383  * Set the timebase for each stream from the corresponding codec timebase and
384  * print it.
385  */
387 
388 /**
389  * Read a transport packet from a media file.
390  *
391  * @param s media file handle
392  * @param pkt is filled
393  * @return 0 if OK, AVERROR_xxx on error
394  */
396 
397 /**
398  * Interleave a packet per dts in an output media file.
399  *
400  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
401  * function, so they cannot be used after it. Note that calling av_packet_unref()
402  * on them is still safe.
403  *
404  * @param s media file handle
405  * @param out the interleaved packet will be output here
406  * @param pkt the input packet
407  * @param flush 1 if no further packets are available as input and all
408  * remaining packets should be output
409  * @return 1 if a packet was output, 0 if no packet could be output,
410  * < 0 if an error occurred
411  */
413  AVPacket *pkt, int flush);
414 
416 
417 /**
418  * Return the frame duration in seconds. Return 0 if not available.
419  */
420 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
421  AVCodecParserContext *pc, AVPacket *pkt);
422 
423 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
424 
425 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
426 
427 /**
428  * Select a PCM codec based on the given parameters.
429  *
430  * @param bps bits-per-sample
431  * @param flt floating-point
432  * @param be big-endian
433  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
434  * e.g. the 1st bit indicates if 8-bit should be signed or
435  * unsigned, the 2nd bit indicates if 16-bit should be signed or
436  * unsigned, etc... This is useful for formats such as WAVE where
437  * only 8-bit is unsigned and all other bit depths are signed.
438  * @return a PCM codec id or AV_CODEC_ID_NONE
439  */
440 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
441 
442 /**
443  * Chooses a timebase for muxing the specified stream.
444  *
445  * The chosen timebase allows sample accurate timestamps based
446  * on the framerate or sample rate for audio streams. It also is
447  * at least as precise as 1/min_precision would be.
448  */
449 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
450 
451 /**
452  * Chooses a timebase for muxing the specified stream.
453  */
455 
456 /**
457  * Generate standard extradata for AVC-Intra based on width/height and field
458  * order.
459  */
461 
462 /**
463  * Add a bitstream filter to a stream.
464  *
465  * @param st output stream to add a filter to
466  * @param name the name of the filter to add
467  * @param args filter-specific argument string
468  * @return >0 on success;
469  * AVERROR code on failure
470  */
471 int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args);
472 
473 /**
474  * Wrap errno on rename() error.
475  *
476  * @param oldpath source path
477  * @param newpath destination path
478  * @return 0 or AVERROR on failure
479  */
480 static inline int ff_rename(const char *oldpath, const char *newpath, void *logctx)
481 {
482  int ret = 0;
483  if (rename(oldpath, newpath) == -1) {
484  ret = AVERROR(errno);
485  if (logctx)
486  av_log(logctx, AV_LOG_ERROR, "failed to rename file %s to %s\n", oldpath, newpath);
487  }
488  return ret;
489 }
490 
491 /**
492  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
493  * which is always set to 0.
494  *
495  * @param size size of extradata
496  * @return 0 if OK, AVERROR_xxx on error
497  */
498 int ff_alloc_extradata(AVCodecContext *avctx, int size);
499 
500 /**
501  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
502  * which is always set to 0 and fill it from pb.
503  *
504  * @param size size of extradata
505  * @return >= 0 if OK, AVERROR_xxx on error
506  */
507 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size);
508 
509 /**
510  * add frame for rfps calculation.
511  *
512  * @param dts timestamp of the i-th frame
513  * @return 0 if OK, AVERROR_xxx on error
514  */
515 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
516 
518 
519 /**
520  * Flags for AVFormatContext.write_uncoded_frame()
521  */
523 
524  /**
525  * Query whether the feature is possible on this stream.
526  * The frame argument is ignored.
527  */
529 
530 };
531 
532 /**
533  * Copies the whilelists from one context to the other
534  */
536 
537 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
539 
540 /**
541  * Returned by demuxers to indicate that data was consumed but discarded
542  * (ignored streams or junk data). The framework will re-call the demuxer.
543  */
544 #define FFERROR_REDO FFERRTAG('R','E','D','O')
545 
546 /*
547  * A wrapper around AVFormatContext.io_close that should be used
548  * intead of calling the pointer directly.
549  */
551 
552 /**
553  * Parse creation_time in AVFormatContext metadata if exists and warn if the
554  * parsing fails.
555  *
556  * @param s AVFormatContext
557  * @param timestamp parsed timestamp in microseconds, only set on successful parsing
558  * @param return_seconds set this to get the number of seconds in timestamp instead of microseconds
559  * @return 1 if OK, 0 if the metadata was not present, AVERROR(EINVAL) on parse error
560  */
561 int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds);
562 
563 #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:402
const char const char void * val
Definition: avisynth_c.h:634
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
enum AVCodecID id
Definition: internal.h:43
struct AVPacketList * raw_packet_buffer
Raw packets from the demuxer, prior to parsing and decoding.
Definition: internal.h:88
int bitstream_checked
Whether or not check_bitstream should still be run on each packet.
Definition: internal.h:144
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:264
static void flush(AVCodecContext *avctx)
struct AVPacketList * parse_queue_end
Definition: internal.h:94
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2821
const char * fmt
Definition: avisynth_c.h:632
int reorder
Set to 1 if the codec allows reordering, so pts can be different from dts.
Definition: internal.h:132
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:4149
int ff_get_extradata(AVCodecContext *avctx, 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:3000
int64_t data_offset
offset of the first packet
Definition: internal.h:80
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:1152
struct tm * ff_brktimegm(time_t secs, struct tm *tm)
Definition: cutils.c:31
int64_t offset
Offset to remap timestamps to be non-negative.
Definition: internal.h:106
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:2811
int avoid_negative_ts_use_pts
Definition: internal.h:119
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:1787
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:3911
Format I/O context.
Definition: avformat.h:1314
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:1692
char str[32]
Definition: internal.h:48
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1657
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:1706
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:956
miscellaneous OS support macros and functions.
Query whether the feature is possible on this stream.
Definition: internal.h:528
The exact value of the fractional number is: 'val + num / den'.
Definition: internal.h:59
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
void ff_format_io_close(AVFormatContext *s, AVIOContext **pb)
Definition: utils.c:4736
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:790
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:916
int header_written
Whether or not a header has already been written.
Definition: internal.h:124
uint32_t tag
Definition: movenc.c:1348
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: utils.c:1820
enum AVCodecID id
Definition: internal.h:49
ptrdiff_t size
Definition: opengl_enc.c:101
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:76
int raw_packet_buffer_remaining_size
Definition: internal.h:99
const OptionDef options[]
Definition: ffserver.c:3962
#define av_log(a,...)
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3074
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:3969
Callback for checking whether to abort blocking functions.
Definition: avio.h:50
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:4743
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:101
#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:815
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:4277
int64_t val
Definition: internal.h:60
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:4477
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4228
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:3733
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int32_t
int64_t num
Definition: internal.h:60
#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:672
FILE * out
Definition: movenc-test.c:54
Stream structure.
Definition: avformat.h:877
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts)
add frame for rfps calculation.
Definition: utils.c:3016
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:1719
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:100
int64_t den
Definition: internal.h:60
main external API structure.
Definition: avcodec.h:1532
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2979
void * buf
Definition: avisynth_c.h:553
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:480
AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision)
Chooses a timebase for muxing the specified stream.
Definition: mux.c:102
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
int nb_interleaved_streams
Number of streams relevant for interleaving.
Definition: internal.h:69
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:1998
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:2833
rational number numerator/denominator
Definition: rational.h:43
AVBitStreamFilterContext * bsfc
bitstream filter to run on stream
Definition: internal.h:139
int inject_global_side_data
Definition: internal.h:117
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4121
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:1960
int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:144
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:4174
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:44
struct AVPacketList * parse_queue
Packets split by the parser get queued here.
Definition: internal.h:93
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:111
int ff_get_v_length(uint64_t val)
Get the length in bytes which is needed to store val as v.
Definition: aviobuf.c:392
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:824
unsigned bps
Definition: movenc.c:1349
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:522
struct AVPacketList * packet_buffer_end
Definition: internal.h:77
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: utils.c:4665
void INT64 start
Definition: avisynth_c.h:553
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:462
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:706
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:4100
This structure stores compressed data.
Definition: avcodec.h:1444
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:1892
struct AVPacketList * raw_packet_buffer_end
Definition: internal.h:89
const char * name
Definition: opengl_enc.c:103
static int width