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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 #ifdef DEBUG
35 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
36 #else
37 # define hex_dump_debug(class, buf, size) do { if (0) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size); } while(0)
38 #endif
39 
40 typedef struct AVCodecTag {
41  enum AVCodecID id;
42  unsigned int tag;
43 } AVCodecTag;
44 
45 typedef struct CodecMime{
46  char str[32];
47  enum AVCodecID id;
48 } CodecMime;
49 
51  /**
52  * Number of streams relevant for interleaving.
53  * Muxing only.
54  */
56 
57  /**
58  * This buffer is only needed when packets were already buffered but
59  * not decoded, for example to get the codec parameters in MPEG
60  * streams.
61  */
64 
65  /* av_seek_frame() support */
66  int64_t data_offset; /**< offset of the first packet */
67 
68  /**
69  * Raw packets from the demuxer, prior to parsing and decoding.
70  * This buffer is used for buffering packets until the codec can
71  * be identified, as parsing cannot be done without knowing the
72  * codec.
73  */
76  /**
77  * Packets split by the parser get queued here.
78  */
81  /**
82  * Remaining size available for raw_packet_buffer, in bytes.
83  */
84 #define RAW_PACKET_BUFFER_SIZE 2500000
86 
87  /**
88  * Offset to remap timestamps to be non-negative.
89  * Expressed in timebase units.
90  * @see AVStream.mux_ts_offset
91  */
92  int64_t offset;
93 
94  /**
95  * Timebase for the timestamp offset.
96  */
98 
100 
102 };
103 
104 #ifdef __GNUC__
105 #define dynarray_add(tab, nb_ptr, elem)\
106 do {\
107  __typeof__(tab) _tab = (tab);\
108  __typeof__(elem) _elem = (elem);\
109  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
110  av_dynarray_add(_tab, nb_ptr, _elem);\
111 } while(0)
112 #else
113 #define dynarray_add(tab, nb_ptr, elem)\
114 do {\
115  av_dynarray_add((tab), nb_ptr, (elem));\
116 } while(0)
117 #endif
118 
119 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
120 
121 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
122 
123 /**
124  * Parse a string of hexadecimal strings. Any space between the hexadecimal
125  * digits is ignored.
126  *
127  * @param data if non-null, the parsed data is written to this pointer
128  * @param p the string to parse
129  * @return the number of bytes written (or to be written, if data is null)
130  */
131 int ff_hex_to_data(uint8_t *data, const char *p);
132 
133 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
134 
135 /**
136  * Add packet to AVFormatContext->packet_buffer list, determining its
137  * interleaved position using compare() function argument.
138  * @return 0, or < 0 on error
139  */
141  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
142 
144 
145 #define NTP_OFFSET 2208988800ULL
146 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
147 
148 /** Get the current time since NTP epoch in microseconds. */
149 uint64_t ff_ntp_time(void);
150 
151 /**
152  * Append the media-specific SDP fragment for the media stream c
153  * to the buffer buff.
154  *
155  * Note, the buffer needs to be initialized, since it is appended to
156  * existing content.
157  *
158  * @param buff the buffer to append the SDP fragment to
159  * @param size the size of the buff buffer
160  * @param st the AVStream of the media to describe
161  * @param idx the global stream index
162  * @param dest_addr the destination address of the media stream, may be NULL
163  * @param dest_type the destination address type, may be NULL
164  * @param port the destination port of the media stream, 0 if unknown
165  * @param ttl the time to live of the stream, 0 if not multicast
166  * @param fmt the AVFormatContext, which might contain options modifying
167  * the generated SDP
168  */
169 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
170  const char *dest_addr, const char *dest_type,
171  int port, int ttl, AVFormatContext *fmt);
172 
173 /**
174  * Write a packet to another muxer than the one the user originally
175  * intended. Useful when chaining muxers, where one muxer internally
176  * writes a received packet to another muxer.
177  *
178  * @param dst the muxer to write the packet to
179  * @param dst_stream the stream index within dst to write the packet to
180  * @param pkt the packet to be written
181  * @param src the muxer the packet originally was intended for
182  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
183  * @return the value av_write_frame returned
184  */
185 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
187 
188 /**
189  * Get the length in bytes which is needed to store val as v.
190  */
191 int ff_get_v_length(uint64_t val);
192 
193 /**
194  * Put val using a variable number of bytes.
195  */
196 void ff_put_v(AVIOContext *bc, uint64_t val);
197 
198 /**
199  * Read a whole line of text from AVIOContext. Stop reading after reaching
200  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
201  * and may be truncated if the buffer is too small.
202  *
203  * @param s the read-only AVIOContext
204  * @param buf buffer to store the read line
205  * @param maxlen size of the buffer
206  * @return the length of the string written in the buffer, not including the
207  * final \\0
208  */
209 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
210 
211 #define SPACE_CHARS " \t\r\n"
212 
213 /**
214  * Callback function type for ff_parse_key_value.
215  *
216  * @param key a pointer to the key
217  * @param key_len the number of bytes that belong to the key, including the '='
218  * char
219  * @param dest return the destination pointer for the value in *dest, may
220  * be null to ignore the value
221  * @param dest_len the length of the *dest buffer
222  */
223 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
224  int key_len, char **dest, int *dest_len);
225 /**
226  * Parse a string with comma-separated key=value pairs. The value strings
227  * may be quoted and may contain escaped characters within quoted strings.
228  *
229  * @param str the string to parse
230  * @param callback_get_buf function that returns where to store the
231  * unescaped value string.
232  * @param context the opaque context pointer to pass to callback_get_buf
233  */
234 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
235  void *context);
236 
237 /**
238  * Find stream index based on format-specific stream ID
239  * @return stream index, or < 0 on error
240  */
241 int ff_find_stream_index(AVFormatContext *s, int id);
242 
243 /**
244  * Internal version of av_index_search_timestamp
245  */
246 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
247  int64_t wanted_timestamp, int flags);
248 
249 /**
250  * Internal version of av_add_index_entry
251  */
252 int ff_add_index_entry(AVIndexEntry **index_entries,
253  int *nb_index_entries,
254  unsigned int *index_entries_allocated_size,
255  int64_t pos, int64_t timestamp, int size, int distance, int flags);
256 
257 /**
258  * Add a new chapter.
259  *
260  * @param s media file handle
261  * @param id unique ID for this chapter
262  * @param start chapter start time in time_base units
263  * @param end chapter end time in time_base units
264  * @param title chapter title
265  *
266  * @return AVChapter or NULL on error
267  */
269  int64_t start, int64_t end, const char *title);
270 
271 /**
272  * Ensure the index uses less memory than the maximum specified in
273  * AVFormatContext.max_index_size by discarding entries if it grows
274  * too large.
275  */
276 void ff_reduce_index(AVFormatContext *s, int stream_index);
277 
278 enum AVCodecID ff_guess_image2_codec(const char *filename);
279 
280 /**
281  * Convert a date string in ISO8601 format to Unix timestamp.
282  */
283 int64_t ff_iso8601_to_unix_time(const char *datestr);
284 
285 /**
286  * Perform a binary search using av_index_search_timestamp() and
287  * AVInputFormat.read_timestamp().
288  *
289  * @param target_ts target timestamp in the time base of the given stream
290  * @param stream_index stream number
291  */
292 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
293  int64_t target_ts, int flags);
294 
295 /**
296  * Update cur_dts of all streams based on the given timestamp and AVStream.
297  *
298  * Stream ref_st unchanged, others set cur_dts in their native time base.
299  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
300  * @param timestamp new dts expressed in time_base of param ref_st
301  * @param ref_st reference stream giving time_base of param timestamp
302  */
303 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
304 
305 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
306  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
307 
308 /**
309  * Perform a binary search using read_timestamp().
310  *
311  * @param target_ts target timestamp in the time base of the given stream
312  * @param stream_index stream number
313  */
314 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
315  int64_t target_ts, int64_t pos_min,
316  int64_t pos_max, int64_t pos_limit,
317  int64_t ts_min, int64_t ts_max,
318  int flags, int64_t *ts_ret,
319  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
320 
321 /**
322  * Set the time base and wrapping info for a given stream. This will be used
323  * to interpret the stream's timestamps. If the new time base is invalid
324  * (numerator or denominator are non-positive), it leaves the stream
325  * unchanged.
326  *
327  * @param s stream
328  * @param pts_wrap_bits number of bits effectively used by the pts
329  * (used for wrap control)
330  * @param pts_num time base numerator
331  * @param pts_den time base denominator
332  */
333 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
334  unsigned int pts_num, unsigned int pts_den);
335 
336 /**
337  * Add side data to a packet for changing parameters to the given values.
338  * Parameters set to 0 aren't included in the change.
339  */
340 int ff_add_param_change(AVPacket *pkt, int32_t channels,
341  uint64_t channel_layout, int32_t sample_rate,
343 
344 /**
345  * Set the timebase for each stream from the corresponding codec timebase and
346  * print it.
347  */
349 
350 /**
351  * Read a transport packet from a media file.
352  *
353  * @param s media file handle
354  * @param pkt is filled
355  * @return 0 if OK, AVERROR_xxx on error
356  */
358 
359 /**
360  * Interleave a packet per dts in an output media file.
361  *
362  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
363  * function, so they cannot be used after it. Note that calling av_free_packet()
364  * on them is still safe.
365  *
366  * @param s media file handle
367  * @param out the interleaved packet will be output here
368  * @param pkt the input packet
369  * @param flush 1 if no further packets are available as input and all
370  * remaining packets should be output
371  * @return 1 if a packet was output, 0 if no packet could be output,
372  * < 0 if an error occurred
373  */
375  AVPacket *pkt, int flush);
376 
378 
379 /**
380  * Return the frame duration in seconds. Return 0 if not available.
381  */
382 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
383  AVCodecParserContext *pc, AVPacket *pkt);
384 
385 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
386 
387 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
388 
389 /**
390  * Select a PCM codec based on the given parameters.
391  *
392  * @param bps bits-per-sample
393  * @param flt floating-point
394  * @param be big-endian
395  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
396  * e.g. the 1st bit indicates if 8-bit should be signed or
397  * unsigned, the 2nd bit indicates if 16-bit should be signed or
398  * unsigned, etc... This is useful for formats such as WAVE where
399  * only 8-bit is unsigned and all other bit depths are signed.
400  * @return a PCM codec id or AV_CODEC_ID_NONE
401  */
402 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
403 
404 /**
405  * Chooses a timebase for muxing the specified stream.
406  *
407  * The chosen timebase allows sample accurate timestamps based
408  * on the framerate or sample rate for audio streams. It also is
409  * at least as precise as 1/min_precision would be.
410  */
411 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
412 
413 /**
414  * Chooses a timebase for muxing the specified stream.
415  */
417 
418 /**
419  * Generate standard extradata for AVC-Intra based on width/height and field
420  * order.
421  */
423 
424 /**
425  * Wrap errno on rename() error.
426  *
427  * @param oldpath source path
428  * @param newpath destination path
429  * @return 0 or AVERROR on failure
430  */
431 static inline int ff_rename(const char *oldpath, const char *newpath, void *logctx)
432 {
433  int ret = 0;
434  if (rename(oldpath, newpath) == -1) {
435  ret = AVERROR(errno);
436  if (logctx)
437  av_log(logctx, AV_LOG_ERROR, "failed to rename file %s to %s\n", oldpath, newpath);
438  }
439  return ret;
440 }
441 
442 /**
443  * Add new side data to a stream. If a side data of this type already exists, it
444  * is replaced.
445  */
447  int size);
448 
449 /**
450  * Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end
451  * which is always set to 0.
452  *
453  * @param size size of extradata
454  * @return 0 if OK, AVERROR_xxx on error
455  */
456 int ff_alloc_extradata(AVCodecContext *avctx, int size);
457 
458 /**
459  * Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end
460  * which is always set to 0 and fill it from pb.
461  *
462  * @param size size of extradata
463  * @return >= 0 if OK, AVERROR_xxx on error
464  */
465 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size);
466 
467 /**
468  * add frame for rfps calculation.
469  *
470  * @param dts timestamp of the i-th frame
471  * @return 0 if OK, AVERROR_xxx on error
472  */
473 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
474 
476 
477 /**
478  * Flags for AVFormatContext.write_uncoded_frame()
479  */
481 
482  /**
483  * Query whether the feature is possible on this stream.
484  * The frame argument is ignored.
485  */
487 
488 };
489 
490 /**
491  * Copies the whilelists from one context to the other
492  */
494 
495 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
497 
498 #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:395
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
AVPacketSideDataType
Definition: avcodec.h:988
enum AVCodecID id
Definition: internal.h:41
struct AVPacketList * raw_packet_buffer
Raw packets from the demuxer, prior to parsing and decoding.
Definition: internal.h:74
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:223
struct AVPacketList * parse_queue_end
Definition: internal.h:80
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:2713
const char * fmt
Definition: avisynth_c.h:632
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:4006
int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size)
Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: utils.c:2885
int64_t data_offset
offset of the first packet
Definition: internal.h:66
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:1022
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:92
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:2703
static av_always_inline void interleave(IDWTELEM *dst, IDWTELEM *src0, IDWTELEM *src1, int w2, int add, int shift)
Definition: dirac_dwt.c:40
int avoid_negative_ts_use_pts
Definition: internal.h:101
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:1751
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:3768
Format I/O context.
Definition: avformat.h:1272
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:1656
char str[32]
Definition: internal.h:46
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1621
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:1670
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:935
miscellaneous OS support macros and functions.
Query whether the feature is possible on this stream.
Definition: internal.h:486
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:67
uint8_t * ff_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type, int size)
Add new side data to a stream.
Definition: utils.c:4491
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:747
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:813
uint32_t tag
Definition: movenc.c:1333
enum AVCodecID id
Definition: internal.h:47
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:62
int raw_packet_buffer_remaining_size
Definition: internal.h:85
const OptionDef options[]
Definition: ffserver.c:3812
#define av_log(a,...)
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:2959
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:3826
Callback for checking whether to abort blocking functions.
Definition: avio.h:50
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:102
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
const AVIOInterruptCB int_cb
Definition: ffmpeg.c:468
#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:708
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:4146
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
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:4340
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4085
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:3580
ret
Definition: avfilter.c:974
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int64_t ff_iso8601_to_unix_time(const char *datestr)
Convert a date string in ISO8601 format to Unix timestamp.
Definition: utils.c:4094
int32_t
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:644
static void flush(AVCodecContext *avctx)
Definition: aacdec.c:514
Stream structure.
Definition: avformat.h:842
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts)
add frame for rfps calculation.
Definition: utils.c:2901
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:1683
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:104
AVS_Value src
Definition: avisynth_c.h:482
main external API structure.
Definition: avcodec.h:1252
int ff_alloc_extradata(AVCodecContext *avctx, int size)
Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0...
Definition: utils.c:2864
void * buf
Definition: avisynth_c.h:553
GLint GLenum type
Definition: opengl_enc.c:105
static int ff_rename(const char *oldpath, const char *newpath, void *logctx)
Wrap errno on rename() error.
Definition: internal.h:431
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:55
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:1905
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:2725
rational number numerator/denominator
Definition: rational.h:43
int inject_global_side_data
Definition: internal.h:99
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:3978
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:1867
int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:137
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:4031
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:42
struct AVPacketList * parse_queue
Packets split by the parser get queued here.
Definition: internal.h:79
AVRational offset_timebase
Timebase for the timestamp offset.
Definition: internal.h:97
int ff_get_v_length(uint64_t val)
Get the length in bytes which is needed to store val as v.
Definition: aviobuf.c:385
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:1334
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:480
struct AVPacketList * packet_buffer_end
Definition: internal.h:63
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
void INT64 start
Definition: avisynth_c.h:553
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:542
int ff_get_line(AVIOContext *s, char *buf, int maxlen)
Read a whole line of text from AVIOContext.
Definition: aviobuf.c:698
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:3957
This structure stores compressed data.
Definition: avcodec.h:1150
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:1799
struct AVPacketList * raw_packet_buffer_end
Definition: internal.h:75
static int width