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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 
114 
116 };
117 
118 #ifdef __GNUC__
119 #define dynarray_add(tab, nb_ptr, elem)\
120 do {\
121  __typeof__(tab) _tab = (tab);\
122  __typeof__(elem) _elem = (elem);\
123  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
124  av_dynarray_add(_tab, nb_ptr, _elem);\
125 } while(0)
126 #else
127 #define dynarray_add(tab, nb_ptr, elem)\
128 do {\
129  av_dynarray_add((tab), nb_ptr, (elem));\
130 } while(0)
131 #endif
132 
133 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
134 
135 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
136 
137 /**
138  * Parse a string of hexadecimal strings. Any space between the hexadecimal
139  * digits is ignored.
140  *
141  * @param data if non-null, the parsed data is written to this pointer
142  * @param p the string to parse
143  * @return the number of bytes written (or to be written, if data is null)
144  */
145 int ff_hex_to_data(uint8_t *data, const char *p);
146 
147 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
148 
149 /**
150  * Add packet to AVFormatContext->packet_buffer list, determining its
151  * interleaved position using compare() function argument.
152  * @return 0, or < 0 on error
153  */
155  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
156 
158 
159 #define NTP_OFFSET 2208988800ULL
160 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
161 
162 /** Get the current time since NTP epoch in microseconds. */
163 uint64_t ff_ntp_time(void);
164 
165 /**
166  * Append the media-specific SDP fragment for the media stream c
167  * to the buffer buff.
168  *
169  * Note, the buffer needs to be initialized, since it is appended to
170  * existing content.
171  *
172  * @param buff the buffer to append the SDP fragment to
173  * @param size the size of the buff buffer
174  * @param st the AVStream of the media to describe
175  * @param idx the global stream index
176  * @param dest_addr the destination address of the media stream, may be NULL
177  * @param dest_type the destination address type, may be NULL
178  * @param port the destination port of the media stream, 0 if unknown
179  * @param ttl the time to live of the stream, 0 if not multicast
180  * @param fmt the AVFormatContext, which might contain options modifying
181  * the generated SDP
182  */
183 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
184  const char *dest_addr, const char *dest_type,
185  int port, int ttl, AVFormatContext *fmt);
186 
187 /**
188  * Write a packet to another muxer than the one the user originally
189  * intended. Useful when chaining muxers, where one muxer internally
190  * writes a received packet to another muxer.
191  *
192  * @param dst the muxer to write the packet to
193  * @param dst_stream the stream index within dst to write the packet to
194  * @param pkt the packet to be written
195  * @param src the muxer the packet originally was intended for
196  * @param interleave 0->use av_write_frame, 1->av_interleaved_write_frame
197  * @return the value av_write_frame returned
198  */
199 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
201 
202 /**
203  * Get the length in bytes which is needed to store val as v.
204  */
205 int ff_get_v_length(uint64_t val);
206 
207 /**
208  * Put val using a variable number of bytes.
209  */
210 void ff_put_v(AVIOContext *bc, uint64_t val);
211 
212 /**
213  * Read a whole line of text from AVIOContext. Stop reading after reaching
214  * either a \\n, a \\0 or EOF. The returned string is always \\0-terminated,
215  * and may be truncated if the buffer is too small.
216  *
217  * @param s the read-only AVIOContext
218  * @param buf buffer to store the read line
219  * @param maxlen size of the buffer
220  * @return the length of the string written in the buffer, not including the
221  * final \\0
222  */
223 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
224 
225 #define SPACE_CHARS " \t\r\n"
226 
227 /**
228  * Callback function type for ff_parse_key_value.
229  *
230  * @param key a pointer to the key
231  * @param key_len the number of bytes that belong to the key, including the '='
232  * char
233  * @param dest return the destination pointer for the value in *dest, may
234  * be null to ignore the value
235  * @param dest_len the length of the *dest buffer
236  */
237 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
238  int key_len, char **dest, int *dest_len);
239 /**
240  * Parse a string with comma-separated key=value pairs. The value strings
241  * may be quoted and may contain escaped characters within quoted strings.
242  *
243  * @param str the string to parse
244  * @param callback_get_buf function that returns where to store the
245  * unescaped value string.
246  * @param context the opaque context pointer to pass to callback_get_buf
247  */
248 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
249  void *context);
250 
251 /**
252  * Find stream index based on format-specific stream ID
253  * @return stream index, or < 0 on error
254  */
255 int ff_find_stream_index(AVFormatContext *s, int id);
256 
257 /**
258  * Internal version of av_index_search_timestamp
259  */
260 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
261  int64_t wanted_timestamp, int flags);
262 
263 /**
264  * Internal version of av_add_index_entry
265  */
266 int ff_add_index_entry(AVIndexEntry **index_entries,
267  int *nb_index_entries,
268  unsigned int *index_entries_allocated_size,
269  int64_t pos, int64_t timestamp, int size, int distance, int flags);
270 
271 void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance);
272 
273 /**
274  * Add a new chapter.
275  *
276  * @param s media file handle
277  * @param id unique ID for this chapter
278  * @param start chapter start time in time_base units
279  * @param end chapter end time in time_base units
280  * @param title chapter title
281  *
282  * @return AVChapter or NULL on error
283  */
285  int64_t start, int64_t end, const char *title);
286 
287 /**
288  * Ensure the index uses less memory than the maximum specified in
289  * AVFormatContext.max_index_size by discarding entries if it grows
290  * too large.
291  */
292 void ff_reduce_index(AVFormatContext *s, int stream_index);
293 
294 enum AVCodecID ff_guess_image2_codec(const char *filename);
295 
296 /**
297  * Convert a date string in ISO8601 format to Unix timestamp.
298  */
299 int64_t ff_iso8601_to_unix_time(const char *datestr);
300 
301 /**
302  * Perform a binary search using av_index_search_timestamp() and
303  * AVInputFormat.read_timestamp().
304  *
305  * @param target_ts target timestamp in the time base of the given stream
306  * @param stream_index stream number
307  */
308 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
309  int64_t target_ts, int flags);
310 
311 /**
312  * Update cur_dts of all streams based on the given timestamp and AVStream.
313  *
314  * Stream ref_st unchanged, others set cur_dts in their native time base.
315  * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
316  * @param timestamp new dts expressed in time_base of param ref_st
317  * @param ref_st reference stream giving time_base of param timestamp
318  */
319 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
320 
321 int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos,
322  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
323 
324 /**
325  * Perform a binary search using 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 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
331  int64_t target_ts, int64_t pos_min,
332  int64_t pos_max, int64_t pos_limit,
333  int64_t ts_min, int64_t ts_max,
334  int flags, int64_t *ts_ret,
335  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
336 
337 /**
338  * Set the time base and wrapping info for a given stream. This will be used
339  * to interpret the stream's timestamps. If the new time base is invalid
340  * (numerator or denominator are non-positive), it leaves the stream
341  * unchanged.
342  *
343  * @param s stream
344  * @param pts_wrap_bits number of bits effectively used by the pts
345  * (used for wrap control)
346  * @param pts_num time base numerator
347  * @param pts_den time base denominator
348  */
349 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
350  unsigned int pts_num, unsigned int pts_den);
351 
352 /**
353  * Add side data to a packet for changing parameters to the given values.
354  * Parameters set to 0 aren't included in the change.
355  */
356 int ff_add_param_change(AVPacket *pkt, int32_t channels,
357  uint64_t channel_layout, int32_t sample_rate,
359 
360 /**
361  * Set the timebase for each stream from the corresponding codec timebase and
362  * print it.
363  */
365 
366 /**
367  * Read a transport packet from a media file.
368  *
369  * @param s media file handle
370  * @param pkt is filled
371  * @return 0 if OK, AVERROR_xxx on error
372  */
374 
375 /**
376  * Interleave a packet per dts in an output media file.
377  *
378  * Packets with pkt->destruct == av_destruct_packet will be freed inside this
379  * function, so they cannot be used after it. Note that calling av_free_packet()
380  * on them is still safe.
381  *
382  * @param s media file handle
383  * @param out the interleaved packet will be output here
384  * @param pkt the input packet
385  * @param flush 1 if no further packets are available as input and all
386  * remaining packets should be output
387  * @return 1 if a packet was output, 0 if no packet could be output,
388  * < 0 if an error occurred
389  */
391  AVPacket *pkt, int flush);
392 
394 
395 /**
396  * Return the frame duration in seconds. Return 0 if not available.
397  */
398 void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st,
399  AVCodecParserContext *pc, AVPacket *pkt);
400 
401 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
402 
403 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
404 
405 /**
406  * Select a PCM codec based on the given parameters.
407  *
408  * @param bps bits-per-sample
409  * @param flt floating-point
410  * @param be big-endian
411  * @param sflags signed flags. each bit corresponds to one byte of bit depth.
412  * e.g. the 1st bit indicates if 8-bit should be signed or
413  * unsigned, the 2nd bit indicates if 16-bit should be signed or
414  * unsigned, etc... This is useful for formats such as WAVE where
415  * only 8-bit is unsigned and all other bit depths are signed.
416  * @return a PCM codec id or AV_CODEC_ID_NONE
417  */
418 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
419 
420 /**
421  * Chooses a timebase for muxing the specified stream.
422  *
423  * The chosen timebase allows sample accurate timestamps based
424  * on the framerate or sample rate for audio streams. It also is
425  * at least as precise as 1/min_precision would be.
426  */
427 AVRational ff_choose_timebase(AVFormatContext *s, AVStream *st, int min_precision);
428 
429 /**
430  * Chooses a timebase for muxing the specified stream.
431  */
433 
434 /**
435  * Generate standard extradata for AVC-Intra based on width/height and field
436  * order.
437  */
439 
440 /**
441  * Wrap errno on rename() error.
442  *
443  * @param oldpath source path
444  * @param newpath destination path
445  * @return 0 or AVERROR on failure
446  */
447 static inline int ff_rename(const char *oldpath, const char *newpath, void *logctx)
448 {
449  int ret = 0;
450  if (rename(oldpath, newpath) == -1) {
451  ret = AVERROR(errno);
452  if (logctx)
453  av_log(logctx, AV_LOG_ERROR, "failed to rename file %s to %s\n", oldpath, newpath);
454  }
455  return ret;
456 }
457 
458 /**
459  * Add new side data to a stream. If a side data of this type already exists, it
460  * is replaced.
461  */
463  int size);
464 
465 /**
466  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
467  * which is always set to 0.
468  *
469  * @param size size of extradata
470  * @return 0 if OK, AVERROR_xxx on error
471  */
472 int ff_alloc_extradata(AVCodecContext *avctx, int size);
473 
474 /**
475  * Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end
476  * which is always set to 0 and fill it from pb.
477  *
478  * @param size size of extradata
479  * @return >= 0 if OK, AVERROR_xxx on error
480  */
481 int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size);
482 
483 /**
484  * add frame for rfps calculation.
485  *
486  * @param dts timestamp of the i-th frame
487  * @return 0 if OK, AVERROR_xxx on error
488  */
489 int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t dts);
490 
492 
493 /**
494  * Flags for AVFormatContext.write_uncoded_frame()
495  */
497 
498  /**
499  * Query whether the feature is possible on this stream.
500  * The frame argument is ignored.
501  */
503 
504 };
505 
506 /**
507  * Copies the whilelists from one context to the other
508  */
510 
511 int ffio_open2_wrapper(struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags,
513 
514 #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:1224
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
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:237
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:2773
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:4083
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:2945
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:1041
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:2763
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:115
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:1754
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:3845
Format I/O context.
Definition: avformat.h:1273
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:1659
char str[32]
Definition: internal.h:48
void ff_read_frame_flush(AVFormatContext *s)
Flush the frame reader.
Definition: utils.c:1624
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:1673
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:502
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
uint8_t * ff_stream_new_side_data(AVStream *st, enum AVPacketSideDataType type, int size)
Add new side data to a stream.
Definition: utils.c:4574
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:750
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:832
uint32_t tag
Definition: movenc.c:1334
void ff_configure_buffers_for_index(AVFormatContext *s, int64_t time_tolerance)
Definition: utils.c:1787
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:3807
#define av_log(a,...)
void ff_rfps_calculate(AVFormatContext *ic)
Definition: utils.c:3019
uint64_t ff_ntp_time(void)
Get the current time since NTP epoch in microseconds.
Definition: utils.c:3903
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:464
#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:727
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:4223
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx)
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:4423
int ff_find_stream_index(AVFormatContext *s, int id)
Find stream index based on format-specific stream ID.
Definition: utils.c:4162
void ff_free_stream(AVFormatContext *s, AVStream *st)
Definition: utils.c:3656
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:4171
int32_t
int64_t num
Definition: internal.h:60
int ff_read_packet(AVFormatContext *s, AVPacket *pkt)
Read a transport packet from a media file.
Definition: utils.c:647
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:2961
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:1686
enum AVCodecID ff_guess_image2_codec(const char *filename)
Definition: img2.c:104
AVS_Value src
Definition: avisynth_c.h:482
int64_t den
Definition: internal.h:60
main external API structure.
Definition: avcodec.h:1502
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:2924
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:447
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:1965
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:2785
rational number numerator/denominator
Definition: rational.h:43
int inject_global_side_data
Definition: internal.h:113
int ff_hex_to_data(uint8_t *data, const char *p)
Parse a string of hexadecimal strings.
Definition: utils.c:4055
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:1927
int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src)
Copies the whilelists from one context to the other.
Definition: utils.c:140
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:4108
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: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:1335
AVWriteUncodedFrameFlags
Flags for AVFormatContext.write_uncoded_frame()
Definition: internal.h:496
struct AVPacketList * packet_buffer_end
Definition: internal.h:77
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:559
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:4034
This structure stores compressed data.
Definition: avcodec.h:1400
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:1859
struct AVPacketList * raw_packet_buffer_end
Definition: internal.h:89
static int width