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04d7f601 DB |
1 | /* |
2 | * copyright (c) 2001 Fabrice Bellard | |
3 | * | |
2912e87a | 4 | * This file is part of Libav. |
b78e7197 | 5 | * |
2912e87a | 6 | * Libav is free software; you can redistribute it and/or |
04d7f601 DB |
7 | * modify it under the terms of the GNU Lesser General Public |
8 | * License as published by the Free Software Foundation; either | |
b78e7197 | 9 | * version 2.1 of the License, or (at your option) any later version. |
04d7f601 | 10 | * |
2912e87a | 11 | * Libav is distributed in the hope that it will be useful, |
04d7f601 DB |
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 | |
2912e87a | 17 | * License along with Libav; if not, write to the Free Software |
04d7f601 DB |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
19 | */ | |
20 | ||
98790382 SS |
21 | #ifndef AVFORMAT_AVFORMAT_H |
22 | #define AVFORMAT_AVFORMAT_H | |
de6d9b64 | 23 | |
072e3efd | 24 | |
c97429e2 | 25 | /** |
7ed0a77f | 26 | * Return the LIBAVFORMAT_VERSION_INT constant. |
c97429e2 SS |
27 | */ |
28 | unsigned avformat_version(void); | |
29 | ||
c1736936 | 30 | /** |
49bd8e4b | 31 | * Return the libavformat build-time configuration. |
c1736936 | 32 | */ |
41600690 | 33 | const char *avformat_configuration(void); |
c1736936 DB |
34 | |
35 | /** | |
49bd8e4b | 36 | * Return the libavformat license. |
c1736936 | 37 | */ |
41600690 | 38 | const char *avformat_license(void); |
c1736936 | 39 | |
f71869a4 | 40 | #include <time.h> |
67070e4f | 41 | #include <stdio.h> /* FILE */ |
76a448ed | 42 | #include "libavcodec/avcodec.h" |
d9f80ea2 | 43 | #include "libavutil/dict.h" |
abc78a5a | 44 | #include "libavutil/log.h" |
de6d9b64 | 45 | |
de6d9b64 | 46 | #include "avio.h" |
50196a98 | 47 | #include "libavformat/version.h" |
de6d9b64 | 48 | |
f610a9f2 AJ |
49 | struct AVFormatContext; |
50 | ||
a6d18a0e | 51 | |
1a53a438 RT |
52 | /** |
53 | * @defgroup metadata_api Public Metadata API | |
54 | * @{ | |
ea29242c | 55 | * The metadata API allows libavformat to export metadata tags to a client |
2912e87a | 56 | * application using a sequence of key/value pairs. Like all strings in Libav, |
61648423 AK |
57 | * metadata must be stored as UTF-8 encoded Unicode. Note that metadata |
58 | * exported by demuxers isn't checked to be valid UTF-8 in most cases. | |
ea29242c | 59 | * Important concepts to keep in mind: |
1a53a438 | 60 | * - Keys are unique; there can never be 2 tags with the same key. This is |
ea29242c MM |
61 | * also meant semantically, i.e., a demuxer should not knowingly produce |
62 | * several keys that are literally different but semantically identical. | |
63 | * E.g., key=Author5, key=Author6. In this example, all authors must be | |
64 | * placed in the same tag. | |
1a53a438 | 65 | * - Metadata is flat, not hierarchical; there are no subtags. If you |
ea29242c MM |
66 | * want to store, e.g., the email address of the child of producer Alice |
67 | * and actor Bob, that could have key=alice_and_bobs_childs_email_address. | |
1a53a438 | 68 | * - Several modifiers can be applied to the tag name. This is done by |
ca76a119 AK |
69 | * appending a dash character ('-') and the modifier name in the order |
70 | * they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng. | |
1a53a438 | 71 | * - language -- a tag whose value is localized for a particular language |
ca76a119 AK |
72 | * is appended with the ISO 639-2/B 3-letter language code. |
73 | * For example: Author-ger=Michael, Author-eng=Mike | |
74 | * The original/default language is in the unqualified "Author" tag. | |
75 | * A demuxer should set a default if it sets any translated tag. | |
1a53a438 | 76 | * - sorting -- a modified version of a tag that should be used for |
ca76a119 AK |
77 | * sorting will have '-sort' appended. E.g. artist="The Beatles", |
78 | * artist-sort="Beatles, The". | |
79 | * | |
1a53a438 | 80 | * - Demuxers attempt to export metadata in a generic format, however tags |
03700d39 AK |
81 | * with no generic equivalents are left as they are stored in the container. |
82 | * Follows a list of generic tag names: | |
ca76a119 | 83 | * |
1a53a438 RT |
84 | @verbatim |
85 | album -- name of the set this work belongs to | |
86 | album_artist -- main creator of the set/album, if different from artist. | |
87 | e.g. "Various Artists" for compilation albums. | |
88 | artist -- main creator of the work | |
89 | comment -- any additional description of the file. | |
90 | composer -- who composed the work, if different from artist. | |
91 | copyright -- name of copyright holder. | |
92 | creation_time-- date when the file was created, preferably in ISO 8601. | |
93 | date -- date when the work was created, preferably in ISO 8601. | |
94 | disc -- number of a subset, e.g. disc in a multi-disc collection. | |
95 | encoder -- name/settings of the software/hardware that produced the file. | |
96 | encoded_by -- person/group who created the file. | |
97 | filename -- original name of the file. | |
98 | genre -- <self-evident>. | |
99 | language -- main language in which the work is performed, preferably | |
100 | in ISO 639-2 format. Multiple languages can be specified by | |
101 | separating them with commas. | |
102 | performer -- artist who performed the work, if different from artist. | |
103 | E.g for "Also sprach Zarathustra", artist would be "Richard | |
104 | Strauss" and performer "London Philharmonic Orchestra". | |
105 | publisher -- name of the label/publisher. | |
106 | service_name -- name of the service in broadcasting (channel name). | |
107 | service_provider -- name of the service provider in broadcasting. | |
108 | title -- name of the work. | |
109 | track -- number of this work in the set, can be in form current/total. | |
110 | variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of | |
111 | @endverbatim | |
112 | * | |
12489443 RT |
113 | * Look in the examples section for an application example how to use the Metadata API. |
114 | * | |
1a53a438 | 115 | * @} |
a6d18a0e MN |
116 | */ |
117 | ||
d9f80ea2 AK |
118 | #if FF_API_OLD_METADATA2 |
119 | /** | |
120 | * @defgroup old_metadata Old metadata API | |
121 | * The following functions are deprecated, use | |
122 | * their equivalents from libavutil/dict.h instead. | |
123 | * @{ | |
124 | */ | |
a6d18a0e | 125 | |
d9f80ea2 AK |
126 | #define AV_METADATA_MATCH_CASE AV_DICT_MATCH_CASE |
127 | #define AV_METADATA_IGNORE_SUFFIX AV_DICT_IGNORE_SUFFIX | |
128 | #define AV_METADATA_DONT_STRDUP_KEY AV_DICT_DONT_STRDUP_KEY | |
129 | #define AV_METADATA_DONT_STRDUP_VAL AV_DICT_DONT_STRDUP_VAL | |
130 | #define AV_METADATA_DONT_OVERWRITE AV_DICT_DONT_OVERWRITE | |
131 | ||
132 | typedef attribute_deprecated AVDictionary AVMetadata; | |
133 | typedef attribute_deprecated AVDictionaryEntry AVMetadataTag; | |
a6d18a0e | 134 | |
f610a9f2 | 135 | typedef struct AVMetadataConv AVMetadataConv; |
a6d18a0e MN |
136 | |
137 | /** | |
49bd8e4b | 138 | * Get a metadata element with matching key. |
26cc5310 | 139 | * |
22e77e44 | 140 | * @param prev Set to the previous matching element to find the next. |
66b6c745 | 141 | * If set to NULL the first matching element is returned. |
22e77e44 DB |
142 | * @param flags Allows case as well as suffix-insensitive comparisons. |
143 | * @return Found tag or NULL, changing key or value leads to undefined behavior. | |
a6d18a0e | 144 | */ |
d9f80ea2 AK |
145 | attribute_deprecated AVDictionaryEntry * |
146 | av_metadata_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags); | |
a6d18a0e | 147 | |
a181981e | 148 | /** |
32e6f246 | 149 | * Set the given tag in *pm, overwriting an existing tag. |
26cc5310 | 150 | * |
983ec304 SS |
151 | * @param pm pointer to a pointer to a metadata struct. If *pm is NULL |
152 | * a metadata struct is allocated and put in *pm. | |
32e6f246 SS |
153 | * @param key tag key to add to *pm (will be av_strduped depending on flags) |
154 | * @param value tag value to add to *pm (will be av_strduped depending on flags). | |
160c896c | 155 | * Passing a NULL value will cause an existing tag to be deleted. |
a181981e MN |
156 | * @return >= 0 on success otherwise an error code <0 |
157 | */ | |
d9f80ea2 | 158 | attribute_deprecated int av_metadata_set2(AVDictionary **pm, const char *key, const char *value, int flags); |
a6d18a0e | 159 | |
094d9df7 | 160 | /** |
03700d39 | 161 | * This function is provided for compatibility reason and currently does nothing. |
f610a9f2 | 162 | */ |
03700d39 AK |
163 | attribute_deprecated void av_metadata_conv(struct AVFormatContext *ctx, const AVMetadataConv *d_conv, |
164 | const AVMetadataConv *s_conv); | |
f610a9f2 AJ |
165 | |
166 | /** | |
d9f80ea2 AK |
167 | * Copy metadata from one AVDictionary struct into another. |
168 | * @param dst pointer to a pointer to a AVDictionary struct. If *dst is NULL, | |
7f88a5bf | 169 | * this function will allocate a struct for you and put it in *dst |
d9f80ea2 | 170 | * @param src pointer to source AVDictionary struct |
7f88a5bf | 171 | * @param flags flags to use when setting metadata in *dst |
d2d67e42 | 172 | * @note metadata is read using the AV_DICT_IGNORE_SUFFIX flag |
7f88a5bf | 173 | */ |
d9f80ea2 | 174 | attribute_deprecated void av_metadata_copy(AVDictionary **dst, AVDictionary *src, int flags); |
7f88a5bf RB |
175 | |
176 | /** | |
d9f80ea2 | 177 | * Free all the memory allocated for an AVDictionary struct. |
094d9df7 | 178 | */ |
d9f80ea2 AK |
179 | attribute_deprecated void av_metadata_free(AVDictionary **m); |
180 | /** | |
181 | * @} | |
182 | */ | |
183 | #endif | |
094d9df7 | 184 | |
a6d18a0e | 185 | |
de6d9b64 FB |
186 | /* packet functions */ |
187 | ||
3217cb42 PI |
188 | |
189 | /** | |
49bd8e4b | 190 | * Allocate and read the payload of a packet and initialize its |
d1b9adf2 | 191 | * fields with default values. |
3217cb42 PI |
192 | * |
193 | * @param pkt packet | |
4f57fa8c DB |
194 | * @param size desired payload size |
195 | * @return >0 (read size) if OK, AVERROR_xxx otherwise | |
3217cb42 | 196 | */ |
ae628ec1 | 197 | int av_get_packet(AVIOContext *s, AVPacket *pkt, int size); |
3217cb42 | 198 | |
de6d9b64 | 199 | |
6bfc2683 | 200 | /** |
fa8cc126 RD |
201 | * Read data and append it to the current content of the AVPacket. |
202 | * If pkt->size is 0 this is identical to av_get_packet. | |
6bfc2683 RD |
203 | * Note that this uses av_grow_packet and thus involves a realloc |
204 | * which is inefficient. Thus this function should only be used | |
205 | * when there is no reasonable way to know (an upper bound of) | |
206 | * the final size. | |
207 | * | |
208 | * @param pkt packet | |
209 | * @param size amount of data to read | |
210 | * @return >0 (read size) if OK, AVERROR_xxx otherwise, previous data | |
211 | * will not be lost even if an error occurs. | |
212 | */ | |
ae628ec1 | 213 | int av_append_packet(AVIOContext *s, AVPacket *pkt, int size); |
6bfc2683 | 214 | |
de6d9b64 | 215 | /*************************************************/ |
916c80e9 FB |
216 | /* fractional numbers for exact pts handling */ |
217 | ||
671adb17 | 218 | /** |
4f57fa8c DB |
219 | * The exact value of the fractional number is: 'val + num / den'. |
220 | * num is assumed to be 0 <= num < den. | |
4c08b2bd | 221 | */ |
916c80e9 | 222 | typedef struct AVFrac { |
115329f1 | 223 | int64_t val, num, den; |
52e57500 | 224 | } AVFrac; |
916c80e9 | 225 | |
916c80e9 | 226 | /*************************************************/ |
b9a281db | 227 | /* input/output formats */ |
de6d9b64 | 228 | |
7caf0cc6 MN |
229 | struct AVCodecTag; |
230 | ||
76c56376 MN |
231 | /** |
232 | * This structure contains the data a format has to probe a file. | |
233 | */ | |
b9a281db | 234 | typedef struct AVProbeData { |
5c91a675 | 235 | const char *filename; |
e5f58f81 | 236 | unsigned char *buf; /**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. */ |
237 | int buf_size; /**< Size of buf except extra allocated bytes */ | |
b9a281db FB |
238 | } AVProbeData; |
239 | ||
22e77e44 | 240 | #define AVPROBE_SCORE_MAX 100 ///< maximum score, half of that is used for file-extension-based detection |
87e87886 | 241 | #define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer |
de6d9b64 FB |
242 | |
243 | typedef struct AVFormatParameters { | |
bffd4dd1 | 244 | #if FF_API_FORMAT_PARAMETERS |
b2592ea4 | 245 | attribute_deprecated AVRational time_base; |
bffd4dd1 AK |
246 | attribute_deprecated int sample_rate; |
247 | attribute_deprecated int channels; | |
89d1b7f4 AK |
248 | attribute_deprecated int width; |
249 | attribute_deprecated int height; | |
f91ccb1d | 250 | attribute_deprecated enum PixelFormat pix_fmt; |
d20576d0 | 251 | attribute_deprecated int channel; /**< Used to select DV channel. */ |
fc68a8f7 | 252 | attribute_deprecated const char *standard; /**< deprecated, use demuxer-specific options instead. */ |
fb37d573 | 253 | attribute_deprecated unsigned int mpeg2ts_raw:1; /**< deprecated, use mpegtsraw demuxer */ |
17a5556d AK |
254 | /**< deprecated, use mpegtsraw demuxer-specific options instead */ |
255 | attribute_deprecated unsigned int mpeg2ts_compute_pcr:1; | |
4779f593 AK |
256 | attribute_deprecated unsigned int initial_pause:1; /**< Do not begin to play the stream |
257 | immediately (RTSP only). */ | |
603b8bc2 | 258 | attribute_deprecated unsigned int prealloced_context:1; |
17a5556d | 259 | #endif |
de6d9b64 FB |
260 | } AVFormatParameters; |
261 | ||
22a3212e | 262 | //! Demuxer will use avio_open, no opened file should be provided by the caller. |
40d9c544 | 263 | #define AVFMT_NOFILE 0x0001 |
4f57fa8c DB |
264 | #define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */ |
265 | #define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */ | |
266 | #define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for | |
267 | raw picture data. */ | |
268 | #define AVFMT_GLOBALHEADER 0x0040 /**< Format wants global header. */ | |
269 | #define AVFMT_NOTIMESTAMPS 0x0080 /**< Format does not need / have any timestamps. */ | |
270 | #define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */ | |
58ec7e00 | 271 | #define AVFMT_TS_DISCONT 0x0200 /**< Format allows timestamp discontinuities. Note, muxers always require valid (monotone) timestamps */ |
25918212 | 272 | #define AVFMT_VARIABLE_FPS 0x0400 /**< Format allows variable fps. */ |
ab5a0175 | 273 | #define AVFMT_NODIMENSIONS 0x0800 /**< Format does not need width/height */ |
bb62d5c1 | 274 | #define AVFMT_NOSTREAMS 0x1000 /**< Format does not require any streams */ |
69fa2396 VP |
275 | #define AVFMT_NOBINSEARCH 0x2000 /**< Format does not allow to fallback to binary search via read_timestamp */ |
276 | #define AVFMT_NOGENSEARCH 0x4000 /**< Format does not allow to fallback to generic search */ | |
b631fba9 | 277 | #define AVFMT_NO_BYTE_SEEK 0x8000 /**< Format does not allow seeking by bytes */ |
b9a281db FB |
278 | |
279 | typedef struct AVOutputFormat { | |
de6d9b64 | 280 | const char *name; |
bde15e74 SS |
281 | /** |
282 | * Descriptive name for the format, meant to be more human-readable | |
819174fa | 283 | * than name. You should use the NULL_IF_CONFIG_SMALL() macro |
bde15e74 SS |
284 | * to define it. |
285 | */ | |
de6d9b64 FB |
286 | const char *long_name; |
287 | const char *mime_type; | |
4f57fa8c | 288 | const char *extensions; /**< comma-separated filename extensions */ |
76c56376 MN |
289 | /** |
290 | * size of private data so that it can be allocated in the wrapper | |
291 | */ | |
b9a281db | 292 | int priv_data_size; |
de6d9b64 | 293 | /* output support */ |
43d414ba PI |
294 | enum CodecID audio_codec; /**< default audio codec */ |
295 | enum CodecID video_codec; /**< default video codec */ | |
de6d9b64 | 296 | int (*write_header)(struct AVFormatContext *); |
e928649b | 297 | int (*write_packet)(struct AVFormatContext *, AVPacket *pkt); |
de6d9b64 | 298 | int (*write_trailer)(struct AVFormatContext *); |
76c56376 | 299 | /** |
89e568fe AH |
300 | * can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_RAWPICTURE, |
301 | * AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, | |
302 | * AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS | |
76c56376 | 303 | */ |
b9a281db | 304 | int flags; |
76c56376 MN |
305 | /** |
306 | * Currently only used to set pixel format if not YUV420P. | |
307 | */ | |
290c5fa6 | 308 | int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *); |
78cb7273 DB |
309 | int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, |
310 | AVPacket *in, int flush); | |
7caf0cc6 MN |
311 | |
312 | /** | |
78cb7273 | 313 | * List of supported codec_id-codec_tag pairs, ordered by "better |
22e77e44 | 314 | * choice first". The arrays are all terminated by CODEC_ID_NONE. |
7caf0cc6 | 315 | */ |
c1854592 | 316 | const struct AVCodecTag * const *codec_tag; |
7caf0cc6 | 317 | |
11bf3847 AJ |
318 | enum CodecID subtitle_codec; /**< default subtitle codec */ |
319 | ||
451d566f | 320 | #if FF_API_OLD_METADATA2 |
719e721a | 321 | const AVMetadataConv *metadata_conv; |
03700d39 | 322 | #endif |
f610a9f2 | 323 | |
cf99e4aa AH |
324 | const AVClass *priv_class; ///< AVClass for the private context |
325 | ||
48f9e457 AK |
326 | /** |
327 | * Test if the given codec can be stored in this container. | |
328 | * | |
329 | * @return 1 if the codec is supported, 0 if it is not. | |
330 | * A negative number if unknown. | |
331 | */ | |
332 | int (*query_codec)(enum CodecID id, int std_compliance); | |
333 | ||
b9a281db FB |
334 | /* private fields */ |
335 | struct AVOutputFormat *next; | |
336 | } AVOutputFormat; | |
de6d9b64 | 337 | |
b9a281db | 338 | typedef struct AVInputFormat { |
76c56376 MN |
339 | /** |
340 | * A comma separated list of short names for the format. New names | |
ac3ccbc0 AC |
341 | * may be appended with a minor bump. |
342 | */ | |
b9a281db | 343 | const char *name; |
76c56376 | 344 | |
bde15e74 SS |
345 | /** |
346 | * Descriptive name for the format, meant to be more human-readable | |
819174fa | 347 | * than name. You should use the NULL_IF_CONFIG_SMALL() macro |
bde15e74 SS |
348 | * to define it. |
349 | */ | |
b9a281db | 350 | const char *long_name; |
76c56376 MN |
351 | |
352 | /** | |
353 | * Size of private data so that it can be allocated in the wrapper. | |
354 | */ | |
b9a281db | 355 | int priv_data_size; |
76c56376 | 356 | |
65d7d68b | 357 | /** |
22e77e44 | 358 | * Tell if a given file has a chance of being parsed as this format. |
5d81d641 DB |
359 | * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes |
360 | * big so you do not have to check for that unless you need more. | |
65d7d68b | 361 | */ |
b9a281db | 362 | int (*read_probe)(AVProbeData *); |
76c56376 MN |
363 | |
364 | /** | |
365 | * Read the format header and initialize the AVFormatContext | |
366 | * structure. Return 0 if OK. 'ap' if non-NULL contains | |
367 | * additional parameters. Only used in raw format right | |
368 | * now. 'av_new_stream' should be called to create new streams. | |
369 | */ | |
de6d9b64 FB |
370 | int (*read_header)(struct AVFormatContext *, |
371 | AVFormatParameters *ap); | |
76c56376 MN |
372 | |
373 | /** | |
374 | * Read one packet and put it in 'pkt'. pts and flags are also | |
375 | * set. 'av_new_stream' can be called only if the flag | |
2899a28c AJ |
376 | * AVFMTCTX_NOHEADER is used and only in the calling thread (not in a |
377 | * background thread). | |
76c56376 MN |
378 | * @return 0 on success, < 0 on error. |
379 | * When returning an error, pkt must not have been allocated | |
380 | * or must be freed before returning | |
381 | */ | |
de6d9b64 | 382 | int (*read_packet)(struct AVFormatContext *, AVPacket *pkt); |
76c56376 MN |
383 | |
384 | /** | |
385 | * Close the stream. The AVFormatContext and AVStreams are not | |
386 | * freed by this function | |
387 | */ | |
de6d9b64 | 388 | int (*read_close)(struct AVFormatContext *); |
1de2db8f | 389 | |
634e0304 | 390 | #if FF_API_READ_SEEK |
115329f1 | 391 | /** |
4f57fa8c DB |
392 | * Seek to a given timestamp relative to the frames in |
393 | * stream component stream_index. | |
22e77e44 DB |
394 | * @param stream_index Must not be -1. |
395 | * @param flags Selects which direction should be preferred if no exact | |
396 | * match is available. | |
05ce0f11 | 397 | * @return >= 0 on success (but not necessarily the new offset) |
3ba1438d | 398 | */ |
a15c7fd6 AK |
399 | attribute_deprecated int (*read_seek)(struct AVFormatContext *, |
400 | int stream_index, int64_t timestamp, int flags); | |
1de2db8f | 401 | #endif |
8d14a25c | 402 | /** |
4f57fa8c | 403 | * Gets the next timestamp in stream[stream_index].time_base units. |
d9526386 | 404 | * @return the timestamp or AV_NOPTS_VALUE if an error occurred |
8d14a25c MN |
405 | */ |
406 | int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index, | |
407 | int64_t *pos, int64_t pos_limit); | |
76c56376 MN |
408 | |
409 | /** | |
050e20ae JR |
410 | * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS, |
411 | * AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH, | |
b631fba9 | 412 | * AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK. |
76c56376 | 413 | */ |
de6d9b64 | 414 | int flags; |
76c56376 MN |
415 | |
416 | /** | |
417 | * If extensions are defined, then no probe is done. You should | |
418 | * usually not use extension format guessing because it is not | |
419 | * reliable enough | |
420 | */ | |
b9a281db | 421 | const char *extensions; |
76c56376 MN |
422 | |
423 | /** | |
424 | * General purpose read-only value that the format can use. | |
425 | */ | |
b9a281db | 426 | int value; |
fb2758c8 | 427 | |
76c56376 MN |
428 | /** |
429 | * Start/resume playing - only meaningful if using a network-based format | |
430 | * (RTSP). | |
431 | */ | |
fb2758c8 FB |
432 | int (*read_play)(struct AVFormatContext *); |
433 | ||
76c56376 MN |
434 | /** |
435 | * Pause playing - only meaningful if using a network-based format | |
436 | * (RTSP). | |
437 | */ | |
fb2758c8 FB |
438 | int (*read_pause)(struct AVFormatContext *); |
439 | ||
c1854592 | 440 | const struct AVCodecTag * const *codec_tag; |
7caf0cc6 | 441 | |
1de2db8f | 442 | /** |
49bd8e4b | 443 | * Seek to timestamp ts. |
1de2db8f MN |
444 | * Seeking will be done so that the point from which all active streams |
445 | * can be presented successfully will be closest to ts and within min/max_ts. | |
446 | * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. | |
447 | */ | |
882fb0a3 | 448 | int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags); |
1de2db8f | 449 | |
451d566f | 450 | #if FF_API_OLD_METADATA2 |
719e721a | 451 | const AVMetadataConv *metadata_conv; |
03700d39 | 452 | #endif |
f610a9f2 | 453 | |
5dc82144 AK |
454 | const AVClass *priv_class; ///< AVClass for the private context |
455 | ||
b9a281db FB |
456 | /* private fields */ |
457 | struct AVInputFormat *next; | |
458 | } AVInputFormat; | |
de6d9b64 | 459 | |
57004ff1 AJ |
460 | enum AVStreamParseType { |
461 | AVSTREAM_PARSE_NONE, | |
462 | AVSTREAM_PARSE_FULL, /**< full parsing and repack */ | |
4f57fa8c | 463 | AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */ |
78cb7273 | 464 | AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */ |
74a6df59 | 465 | AVSTREAM_PARSE_FULL_ONCE, /**< full parsing and repack of the first frame only, only implemented for H.264 currently */ |
57004ff1 AJ |
466 | }; |
467 | ||
fb2758c8 FB |
468 | typedef struct AVIndexEntry { |
469 | int64_t pos; | |
470 | int64_t timestamp; | |
471 | #define AVINDEX_KEYFRAME 0x0001 | |
30a43f2d | 472 | int flags:2; |
4f57fa8c DB |
473 | int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs. 32 bytes due to possible 8-byte alignment). |
474 | int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */ | |
fb2758c8 FB |
475 | } AVIndexEntry; |
476 | ||
90c2295b ES |
477 | #define AV_DISPOSITION_DEFAULT 0x0001 |
478 | #define AV_DISPOSITION_DUB 0x0002 | |
479 | #define AV_DISPOSITION_ORIGINAL 0x0004 | |
480 | #define AV_DISPOSITION_COMMENT 0x0008 | |
481 | #define AV_DISPOSITION_LYRICS 0x0010 | |
482 | #define AV_DISPOSITION_KARAOKE 0x0020 | |
76c56376 MN |
483 | |
484 | /** | |
485 | * Track should be used during playback by default. | |
486 | * Useful for subtitle track that should be displayed | |
487 | * even when user did not explicitly ask for subtitles. | |
488 | */ | |
7a617a86 | 489 | #define AV_DISPOSITION_FORCED 0x0040 |
12c14cd4 PR |
490 | #define AV_DISPOSITION_HEARING_IMPAIRED 0x0080 /**< stream for hearing impaired audiences */ |
491 | #define AV_DISPOSITION_VISUAL_IMPAIRED 0x0100 /**< stream for visual impaired audiences */ | |
24a83bd1 | 492 | #define AV_DISPOSITION_CLEAN_EFFECTS 0x0200 /**< stream without voice */ |
90c2295b | 493 | |
ba66ae94 MN |
494 | /** |
495 | * Stream structure. | |
496 | * New fields can be added to the end with minor version bumps. | |
8bfb108b | 497 | * Removal, reordering and changes to existing fields require a major |
ba66ae94 | 498 | * version bump. |
8bfb108b | 499 | * sizeof(AVStream) must not be used outside libav*. |
ba66ae94 | 500 | */ |
de6d9b64 | 501 | typedef struct AVStream { |
43d414ba | 502 | int index; /**< stream index in AVFormatContext */ |
4f57fa8c | 503 | int id; /**< format-specific stream ID */ |
43d414ba | 504 | AVCodecContext *codec; /**< codec context */ |
b4b87d48 | 505 | /** |
22e77e44 DB |
506 | * Real base framerate of the stream. |
507 | * This is the lowest framerate with which all timestamps can be | |
864ff8c1 | 508 | * represented accurately (it is the least common multiple of all |
22e77e44 DB |
509 | * framerates in the stream). Note, this value is just a guess! |
510 | * For example, if the time base is 1/90000 and all frames have either | |
4f57fa8c | 511 | * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1. |
b4b87d48 MN |
512 | */ |
513 | AVRational r_frame_rate; | |
de6d9b64 | 514 | void *priv_data; |
82583548 | 515 | |
9a174562 | 516 | #if FF_API_REORDER_PRIVATE |
b9a281db | 517 | /* internal data used in av_find_stream_info() */ |
82583548 | 518 | int64_t first_dts; |
9a174562 | 519 | #endif |
76c56376 MN |
520 | |
521 | /** | |
522 | * encoding: pts generation when outputting stream | |
523 | */ | |
a9fd2b19 | 524 | struct AVFrac pts; |
5b28c8c3 MN |
525 | |
526 | /** | |
8bfb108b DB |
527 | * This is the fundamental unit of time (in seconds) in terms |
528 | * of which frame timestamps are represented. For fixed-fps content, | |
22e77e44 | 529 | * time base should be 1/framerate and timestamp increments should be 1. |
5d820db2 RD |
530 | * decoding: set by libavformat |
531 | * encoding: set by libavformat in av_write_header | |
5b28c8c3 | 532 | */ |
9ee91c2f | 533 | AVRational time_base; |
9a174562 | 534 | #if FF_API_REORDER_PRIVATE |
43d414ba | 535 | int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */ |
9a174562 | 536 | #endif |
3d813e4c | 537 | #if FF_API_STREAM_COPY |
a48b7a6b | 538 | /* ffmpeg.c private use */ |
3d813e4c AK |
539 | attribute_deprecated int stream_copy; /**< If set, just copy stream. */ |
540 | #endif | |
4f57fa8c | 541 | enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed. |
76c56376 | 542 | |
5e8d2e33 | 543 | #if FF_API_AVSTREAM_QUALITY |
b4aea108 | 544 | //FIXME move stuff to a flags field? |
76c56376 MN |
545 | /** |
546 | * Quality, as it has been removed from AVCodecContext and put in AVVideoFrame. | |
547 | * MN: dunno if that is the right place for it | |
548 | */ | |
5e8d2e33 AK |
549 | attribute_deprecated float quality; |
550 | #endif | |
76c56376 | 551 | |
6d96a9b9 | 552 | /** |
8bfb108b DB |
553 | * Decoding: pts of the first frame of the stream, in stream time base. |
554 | * Only set this if you are absolutely 100% sure that the value you set | |
555 | * it to really is the pts of the first frame. | |
4854c253 | 556 | * This may be undefined (AV_NOPTS_VALUE). |
6d96a9b9 | 557 | */ |
115329f1 | 558 | int64_t start_time; |
76c56376 | 559 | |
e26381b6 | 560 | /** |
8bfb108b | 561 | * Decoding: duration of the stream, in stream time base. |
e26381b6 | 562 | * If a source file does not specify a duration, but does specify |
4f57fa8c | 563 | * a bitrate, this value will be estimated from bitrate and file size. |
e26381b6 | 564 | */ |
ee404803 | 565 | int64_t duration; |
fb2758c8 | 566 | |
9a174562 | 567 | #if FF_API_REORDER_PRIVATE |
fb2758c8 | 568 | /* av_read_frame() support */ |
57004ff1 | 569 | enum AVStreamParseType need_parsing; |
fb2758c8 | 570 | struct AVCodecParserContext *parser; |
6ec87caa | 571 | |
fb2758c8 | 572 | int64_t cur_dts; |
635fbcb1 MN |
573 | int last_IP_duration; |
574 | int64_t last_IP_pts; | |
fb2758c8 | 575 | /* av_seek_frame() support */ |
4f57fa8c DB |
576 | AVIndexEntry *index_entries; /**< Only used if the format does not |
577 | support seeking natively. */ | |
fb2758c8 | 578 | int nb_index_entries; |
191e8ca7 | 579 | unsigned int index_entries_allocated_size; |
9a174562 | 580 | #endif |
115329f1 | 581 | |
b4b87d48 | 582 | int64_t nb_frames; ///< number of frames in this stream if known or 0 |
504ee036 | 583 | |
4f57fa8c | 584 | int disposition; /**< AV_DISPOSITION_* bit field */ |
0bef08e5 | 585 | |
9a174562 | 586 | #if FF_API_REORDER_PRIVATE |
0bef08e5 | 587 | AVProbeData probe_data; |
0d84a8f6 BC |
588 | #define MAX_REORDER_DELAY 16 |
589 | int64_t pts_buffer[MAX_REORDER_DELAY+1]; | |
9a174562 | 590 | #endif |
c30a4489 AJ |
591 | |
592 | /** | |
593 | * sample aspect ratio (0 if unknown) | |
594 | * - encoding: Set by user. | |
595 | * - decoding: Set by libavformat. | |
596 | */ | |
597 | AVRational sample_aspect_ratio; | |
f526adaf | 598 | |
d2d67e42 | 599 | AVDictionary *metadata; |
3a41c2f7 | 600 | |
9a174562 | 601 | #if FF_API_REORDER_PRIVATE |
31769dad VP |
602 | /* Intended mostly for av_read_frame() support. Not supposed to be used by */ |
603 | /* external applications; try to use something else if at all possible. */ | |
3a41c2f7 MN |
604 | const uint8_t *cur_ptr; |
605 | int cur_len; | |
606 | AVPacket cur_pkt; | |
27ca0a79 IS |
607 | |
608 | // Timestamp generation support: | |
609 | /** | |
610 | * Timestamp corresponding to the last dts sync point. | |
611 | * | |
612 | * Initialized when AVCodecParserContext.dts_sync_point >= 0 and | |
613 | * a DTS is received from the underlying container. Otherwise set to | |
614 | * AV_NOPTS_VALUE by default. | |
615 | */ | |
616 | int64_t reference_dts; | |
86cb7e33 BC |
617 | |
618 | /** | |
619 | * Number of packets to buffer for codec probing | |
620 | * NOT PART OF PUBLIC API | |
621 | */ | |
48616887 | 622 | #define MAX_PROBE_PACKETS 2500 |
86cb7e33 | 623 | int probe_packets; |
ddce56ef MN |
624 | |
625 | /** | |
e07b882b | 626 | * last packet in packet_buffer for this stream when muxing. |
ddce56ef MN |
627 | * used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav* |
628 | */ | |
e07b882b | 629 | struct AVPacketList *last_in_packet_buffer; |
9a174562 | 630 | #endif |
02b398ef MN |
631 | |
632 | /** | |
633 | * Average framerate | |
634 | */ | |
635 | AVRational avg_frame_rate; | |
6c6e6ef5 | 636 | |
9a174562 AK |
637 | /***************************************************************** |
638 | * All fields below this line are not part of the public API. They | |
639 | * may not be used outside of libavformat and can be changed and | |
640 | * removed at will. | |
641 | * New public fields should be added right above. | |
642 | ***************************************************************** | |
643 | */ | |
644 | ||
6c6e6ef5 MN |
645 | /** |
646 | * Number of frames that have been demuxed during av_find_stream_info() | |
647 | */ | |
648 | int codec_info_nb_frames; | |
fd0368e7 AJ |
649 | |
650 | /** | |
651 | * Stream informations used internally by av_find_stream_info() | |
652 | */ | |
653 | #define MAX_STD_TIMEBASES (60*12+5) | |
654 | struct { | |
655 | int64_t last_dts; | |
656 | int64_t duration_gcd; | |
657 | int duration_count; | |
658 | double duration_error[MAX_STD_TIMEBASES]; | |
659 | int64_t codec_info_duration; | |
38a4be3f | 660 | int nb_decoded_frames; |
fd0368e7 | 661 | } *info; |
9a174562 AK |
662 | #if !FF_API_REORDER_PRIVATE |
663 | const uint8_t *cur_ptr; | |
664 | int cur_len; | |
665 | AVPacket cur_pkt; | |
666 | ||
667 | // Timestamp generation support: | |
668 | /** | |
669 | * Timestamp corresponding to the last dts sync point. | |
670 | * | |
671 | * Initialized when AVCodecParserContext.dts_sync_point >= 0 and | |
672 | * a DTS is received from the underlying container. Otherwise set to | |
673 | * AV_NOPTS_VALUE by default. | |
674 | */ | |
675 | int64_t reference_dts; | |
676 | int64_t first_dts; | |
677 | int64_t cur_dts; | |
678 | int last_IP_duration; | |
679 | int64_t last_IP_pts; | |
680 | ||
681 | /** | |
682 | * Number of packets to buffer for codec probing | |
683 | */ | |
684 | #define MAX_PROBE_PACKETS 2500 | |
685 | int probe_packets; | |
686 | ||
687 | /** | |
688 | * last packet in packet_buffer for this stream when muxing. | |
689 | */ | |
690 | struct AVPacketList *last_in_packet_buffer; | |
691 | AVProbeData probe_data; | |
692 | #define MAX_REORDER_DELAY 16 | |
693 | int64_t pts_buffer[MAX_REORDER_DELAY+1]; | |
694 | /* av_read_frame() support */ | |
695 | enum AVStreamParseType need_parsing; | |
696 | struct AVCodecParserContext *parser; | |
697 | ||
698 | AVIndexEntry *index_entries; /**< Only used if the format does not | |
699 | support seeking natively. */ | |
700 | int nb_index_entries; | |
701 | unsigned int index_entries_allocated_size; | |
702 | ||
703 | int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */ | |
704 | #endif | |
de6d9b64 FB |
705 | } AVStream; |
706 | ||
15afa396 NS |
707 | #define AV_PROGRAM_RUNNING 1 |
708 | ||
ba66ae94 | 709 | /** |
ba66ae94 | 710 | * New fields can be added to the end with minor version bumps. |
8bfb108b | 711 | * Removal, reordering and changes to existing fields require a major |
ba66ae94 | 712 | * version bump. |
8bfb108b | 713 | * sizeof(AVProgram) must not be used outside libav*. |
ba66ae94 | 714 | */ |
15afa396 NS |
715 | typedef struct AVProgram { |
716 | int id; | |
15afa396 NS |
717 | int flags; |
718 | enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller | |
526efa10 NS |
719 | unsigned int *stream_index; |
720 | unsigned int nb_stream_indexes; | |
d2d67e42 | 721 | AVDictionary *metadata; |
15afa396 NS |
722 | } AVProgram; |
723 | ||
43d414ba | 724 | #define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present |
da24c5e3 FB |
725 | (streams are added dynamically) */ |
726 | ||
79d7836a | 727 | typedef struct AVChapter { |
4f57fa8c DB |
728 | int id; ///< unique ID to identify the chapter |
729 | AVRational time_base; ///< time base in which the start/end timestamps are specified | |
8931e7b4 | 730 | int64_t start, end; ///< chapter start/end time in time_base units |
d2d67e42 | 731 | AVDictionary *metadata; |
79d7836a AK |
732 | } AVChapter; |
733 | ||
252f17e2 | 734 | /** |
4f57fa8c | 735 | * Format I/O context. |
252f17e2 | 736 | * New fields can be added to the end with minor version bumps. |
8bfb108b | 737 | * Removal, reordering and changes to existing fields require a major |
252f17e2 | 738 | * version bump. |
83daced0 AK |
739 | * sizeof(AVFormatContext) must not be used outside libav*, use |
740 | * avformat_alloc_context() to create an AVFormatContext. | |
252f17e2 | 741 | */ |
de6d9b64 | 742 | typedef struct AVFormatContext { |
83daced0 AK |
743 | /** |
744 | * A class for logging and AVOptions. Set by avformat_alloc_context(). | |
745 | * Exports (de)muxer private options if they exist. | |
746 | */ | |
747 | const AVClass *av_class; | |
748 | ||
749 | /** | |
750 | * Can only be iformat or oformat, not both at the same time. | |
751 | * | |
752 | * decoding: set by avformat_open_input(). | |
753 | * encoding: set by the user. | |
754 | */ | |
b9a281db FB |
755 | struct AVInputFormat *iformat; |
756 | struct AVOutputFormat *oformat; | |
83daced0 AK |
757 | |
758 | /** | |
759 | * Format private data. This is an AVOptions-enabled struct | |
760 | * if and only if iformat/oformat.priv_class is not NULL. | |
761 | */ | |
de6d9b64 | 762 | void *priv_data; |
83daced0 AK |
763 | |
764 | /* | |
765 | * I/O context. | |
766 | * | |
767 | * decoding: either set by the user before avformat_open_input() (then | |
768 | * the user must close it manually) or set by avformat_open_input(). | |
769 | * encoding: set by the user. | |
770 | * | |
771 | * Do NOT set this field if AVFMT_NOFILE flag is set in | |
772 | * iformat/oformat.flags. In such a case, the (de)muxer will handle | |
773 | * I/O in some other way and this field will be NULL. | |
774 | */ | |
ae628ec1 | 775 | AVIOContext *pb; |
83daced0 AK |
776 | |
777 | /** | |
778 | * A list of all streams in the file. New streams are created with | |
779 | * avformat_new_stream(). | |
780 | * | |
781 | * decoding: streams are created by libavformat in avformat_open_input(). | |
782 | * If AVFMTCTX_NOHEADER is set in ctx_flags, then new streams may also | |
783 | * appear in av_read_frame(). | |
784 | * encoding: streams are created by the user before avformat_write_header(). | |
785 | */ | |
db69c2e5 | 786 | unsigned int nb_streams; |
38aab35f | 787 | AVStream **streams; |
83daced0 | 788 | |
43d414ba | 789 | char filename[1024]; /**< input or output filename */ |
de6d9b64 | 790 | /* stream info */ |
5f847bf6 AK |
791 | #if FF_API_TIMESTAMP |
792 | /** | |
793 | * @deprecated use 'creation_time' metadata tag instead | |
794 | */ | |
795 | attribute_deprecated int64_t timestamp; | |
796 | #endif | |
6a58e151 | 797 | |
4f57fa8c | 798 | int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */ |
df968050 | 799 | #if FF_API_REORDER_PRIVATE |
4f57fa8c | 800 | /* private data for pts handling (do not modify directly). */ |
76c56376 MN |
801 | /** |
802 | * This buffer is only needed when packets were already buffered but | |
803 | * not decoded, for example to get the codec parameters in MPEG | |
804 | * streams. | |
805 | */ | |
ee404803 | 806 | struct AVPacketList *packet_buffer; |
df968050 | 807 | #endif |
ee404803 | 808 | |
76c56376 MN |
809 | /** |
810 | * Decoding: position of the first frame of the component, in | |
811 | * AV_TIME_BASE fractional seconds. NEVER set this value directly: | |
812 | * It is deduced from the AVStream values. | |
813 | */ | |
115329f1 | 814 | int64_t start_time; |
76c56376 MN |
815 | |
816 | /** | |
817 | * Decoding: duration of the stream, in AV_TIME_BASE fractional | |
818 | * seconds. Only set this value if you know none of the individual stream | |
819 | * durations and also dont set any of them. This is deduced from the | |
820 | * AVStream values if not set. | |
821 | */ | |
ee404803 | 822 | int64_t duration; |
76c56376 | 823 | |
c10731e7 | 824 | #if FF_API_FILESIZE |
76c56376 MN |
825 | /** |
826 | * decoding: total file size, 0 if unknown | |
827 | */ | |
c10731e7 AK |
828 | attribute_deprecated int64_t file_size; |
829 | #endif | |
76c56376 MN |
830 | |
831 | /** | |
832 | * Decoding: total stream bitrate in bit/s, 0 if not | |
833 | * available. Never set it directly if the file_size and the | |
6001dad6 | 834 | * duration are known as Libav can compute it automatically. |
76c56376 | 835 | */ |
ee404803 | 836 | int bit_rate; |
fb2758c8 | 837 | |
df968050 | 838 | #if FF_API_REORDER_PRIVATE |
fb2758c8 FB |
839 | /* av_read_frame() support */ |
840 | AVStream *cur_st; | |
fb2758c8 | 841 | |
fb2758c8 | 842 | /* av_seek_frame() support */ |
ec906fcd | 843 | int64_t data_offset; /**< offset of the first packet */ |
df968050 | 844 | #endif |
115329f1 | 845 | |
5a9ee315 AK |
846 | #if FF_API_MUXRATE |
847 | /** | |
848 | * use mpeg muxer private options instead | |
849 | */ | |
850 | attribute_deprecated int mux_rate; | |
851 | #endif | |
92400be2 | 852 | unsigned int packet_size; |
f172132f AK |
853 | #if FF_API_PRELOAD |
854 | attribute_deprecated int preload; | |
855 | #endif | |
17c88cb0 | 856 | int max_delay; |
8108551a | 857 | |
d31e3f7c | 858 | #if FF_API_LOOP_OUTPUT |
115329f1 DB |
859 | #define AVFMT_NOOUTPUTLOOP -1 |
860 | #define AVFMT_INFINITEOUTPUTLOOP 0 | |
76c56376 MN |
861 | /** |
862 | * number of times to loop output in formats that support it | |
d31e3f7c AK |
863 | * |
864 | * @deprecated use the 'loop' private option in the gif muxer. | |
76c56376 | 865 | */ |
d31e3f7c AK |
866 | attribute_deprecated int loop_output; |
867 | #endif | |
115329f1 | 868 | |
30bc6613 | 869 | int flags; |
22e77e44 | 870 | #define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames. |
4f57fa8c DB |
871 | #define AVFMT_FLAG_IGNIDX 0x0002 ///< Ignore index. |
872 | #define AVFMT_FLAG_NONBLOCK 0x0004 ///< Do not block when reading packets from input. | |
c55806e3 | 873 | #define AVFMT_FLAG_IGNDTS 0x0008 ///< Ignore DTS on frames that contain both DTS & PTS |
fe8344a2 MN |
874 | #define AVFMT_FLAG_NOFILLIN 0x0010 ///< Do not infer any values from other values, just return what is stored in the container |
875 | #define AVFMT_FLAG_NOPARSE 0x0020 ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled | |
28734ac9 MS |
876 | #if FF_API_FLAG_RTP_HINT |
877 | #define AVFMT_FLAG_RTP_HINT 0x0040 ///< Deprecated, use the -movflags rtphint muxer specific AVOption instead | |
878 | #endif | |
05e84c95 | 879 | #define AVFMT_FLAG_CUSTOM_IO 0x0080 ///< The caller has supplied a custom AVIOContext, don't avio_close() it. |
73e8e8db | 880 | #define AVFMT_FLAG_DISCARD_CORRUPT 0x0100 ///< Discard frames marked corrupted |
5894e1bb | 881 | |
6002fdef AK |
882 | #if FF_API_LOOP_INPUT |
883 | /** | |
884 | * @deprecated, use the 'loop' img2 demuxer private option. | |
885 | */ | |
886 | attribute_deprecated int loop_input; | |
887 | #endif | |
76c56376 MN |
888 | |
889 | /** | |
890 | * decoding: size of data to probe; encoding: unused. | |
891 | */ | |
9e6c9470 | 892 | unsigned int probesize; |
a44b3c4d MN |
893 | |
894 | /** | |
83daced0 AK |
895 | * decoding: maximum time (in AV_TIME_BASE units) during which the input should |
896 | * be analyzed in avformat_find_stream_info(). | |
a44b3c4d MN |
897 | */ |
898 | int max_analyze_duration; | |
c964c2c7 RD |
899 | |
900 | const uint8_t *key; | |
901 | int keylen; | |
15afa396 NS |
902 | |
903 | unsigned int nb_programs; | |
904 | AVProgram **programs; | |
62600469 MN |
905 | |
906 | /** | |
907 | * Forced video codec_id. | |
4f57fa8c | 908 | * Demuxing: Set by user. |
62600469 MN |
909 | */ |
910 | enum CodecID video_codec_id; | |
76c56376 | 911 | |
62600469 MN |
912 | /** |
913 | * Forced audio codec_id. | |
4f57fa8c | 914 | * Demuxing: Set by user. |
62600469 MN |
915 | */ |
916 | enum CodecID audio_codec_id; | |
76c56376 | 917 | |
62600469 MN |
918 | /** |
919 | * Forced subtitle codec_id. | |
4f57fa8c | 920 | * Demuxing: Set by user. |
62600469 MN |
921 | */ |
922 | enum CodecID subtitle_codec_id; | |
3dea63bd PK |
923 | |
924 | /** | |
22e77e44 DB |
925 | * Maximum amount of memory in bytes to use for the index of each stream. |
926 | * If the index exceeds this size, entries will be discarded as | |
3dea63bd PK |
927 | * needed to maintain a smaller size. This can lead to slower or less |
928 | * accurate seeking (depends on demuxer). | |
4f57fa8c | 929 | * Demuxers for which a full in-memory index is mandatory will ignore |
3dea63bd PK |
930 | * this. |
931 | * muxing : unused | |
932 | * demuxing: set by user | |
933 | */ | |
934 | unsigned int max_index_size; | |
ab8ab30c RP |
935 | |
936 | /** | |
ffa71b2b | 937 | * Maximum amount of memory in bytes to use for buffering frames |
4f57fa8c | 938 | * obtained from realtime capture devices. |
ab8ab30c RP |
939 | */ |
940 | unsigned int max_picture_buffer; | |
79d7836a | 941 | |
fbabf1e9 | 942 | unsigned int nb_chapters; |
79d7836a | 943 | AVChapter **chapters; |
45b2b05f MN |
944 | |
945 | /** | |
4f57fa8c | 946 | * Flags to enable debugging. |
45b2b05f MN |
947 | */ |
948 | int debug; | |
949 | #define FF_FDEBUG_TS 0x0001 | |
0bef08e5 | 950 | |
df968050 | 951 | #if FF_API_REORDER_PRIVATE |
0bef08e5 | 952 | /** |
4f57fa8c | 953 | * Raw packets from the demuxer, prior to parsing and decoding. |
0bef08e5 MN |
954 | * This buffer is used for buffering packets until the codec can |
955 | * be identified, as parsing cannot be done without knowing the | |
956 | * codec. | |
957 | */ | |
958 | struct AVPacketList *raw_packet_buffer; | |
5c5b1731 MR |
959 | struct AVPacketList *raw_packet_buffer_end; |
960 | ||
961 | struct AVPacketList *packet_buffer_end; | |
df968050 | 962 | #endif |
47146dfb | 963 | |
d2d67e42 | 964 | AVDictionary *metadata; |
af122d6a | 965 | |
df968050 | 966 | #if FF_API_REORDER_PRIVATE |
af122d6a BC |
967 | /** |
968 | * Remaining size available for raw_packet_buffer, in bytes. | |
969 | * NOT PART OF PUBLIC API | |
970 | */ | |
48616887 | 971 | #define RAW_PACKET_BUFFER_SIZE 2500000 |
af122d6a | 972 | int raw_packet_buffer_remaining_size; |
df968050 | 973 | #endif |
b8819c85 MS |
974 | |
975 | /** | |
976 | * Start time of the stream in real world time, in microseconds | |
977 | * since the unix epoch (00:00 1st January 1970). That is, pts=0 | |
978 | * in the stream was captured at this real world time. | |
979 | * - encoding: Set by user. | |
980 | * - decoding: Unused. | |
981 | */ | |
982 | int64_t start_time_realtime; | |
30315a8d AC |
983 | |
984 | /** | |
985 | * decoding: number of frames used to probe fps | |
986 | */ | |
987 | int fps_probe_size; | |
2f63440c DB |
988 | |
989 | /** | |
990 | * Error recognition; higher values will detect more errors but may | |
991 | * misdetect some more or less valid parts as errors. | |
992 | * - encoding: unused | |
993 | * - decoding: Set by user. | |
994 | */ | |
995 | int error_recognition; | |
df968050 | 996 | |
6aa0b98f MS |
997 | /** |
998 | * Custom interrupt callbacks for the I/O layer. | |
999 | * | |
1000 | * decoding: set by the user before avformat_open_input(). | |
1001 | * encoding: set by the user before avformat_write_header() | |
1002 | * (mainly useful for AVFMT_NOFILE formats). The callback | |
1003 | * should also be passed to avio_open2() if it's used to | |
1004 | * open the file. | |
1005 | */ | |
1006 | AVIOInterruptCB interrupt_callback; | |
1007 | ||
df968050 AK |
1008 | /***************************************************************** |
1009 | * All fields below this line are not part of the public API. They | |
1010 | * may not be used outside of libavformat and can be changed and | |
1011 | * removed at will. | |
1012 | * New public fields should be added right above. | |
1013 | ***************************************************************** | |
1014 | */ | |
1015 | #if !FF_API_REORDER_PRIVATE | |
1016 | /** | |
1017 | * Raw packets from the demuxer, prior to parsing and decoding. | |
1018 | * This buffer is used for buffering packets until the codec can | |
1019 | * be identified, as parsing cannot be done without knowing the | |
1020 | * codec. | |
1021 | */ | |
1022 | struct AVPacketList *raw_packet_buffer; | |
1023 | struct AVPacketList *raw_packet_buffer_end; | |
1024 | /** | |
1025 | * Remaining size available for raw_packet_buffer, in bytes. | |
1026 | */ | |
1027 | #define RAW_PACKET_BUFFER_SIZE 2500000 | |
1028 | int raw_packet_buffer_remaining_size; | |
1029 | ||
1030 | /** | |
1031 | * This buffer is only needed when packets were already buffered but | |
1032 | * not decoded, for example to get the codec parameters in MPEG | |
1033 | * streams. | |
1034 | */ | |
1035 | struct AVPacketList *packet_buffer; | |
1036 | struct AVPacketList *packet_buffer_end; | |
1037 | ||
1038 | /* av_read_frame() support */ | |
1039 | AVStream *cur_st; | |
1040 | ||
1041 | /* av_seek_frame() support */ | |
1042 | int64_t data_offset; /**< offset of the first packet */ | |
1043 | #endif | |
de6d9b64 FB |
1044 | } AVFormatContext; |
1045 | ||
1046 | typedef struct AVPacketList { | |
1047 | AVPacket pkt; | |
1048 | struct AVPacketList *next; | |
1049 | } AVPacketList; | |
1050 | ||
aeedac95 SS |
1051 | /** |
1052 | * If f is NULL, returns the first registered input format, | |
22e77e44 | 1053 | * if f is non-NULL, returns the next registered input format after f |
aeedac95 SS |
1054 | * or NULL if f is the last one. |
1055 | */ | |
84be6e72 | 1056 | AVInputFormat *av_iformat_next(AVInputFormat *f); |
aeedac95 SS |
1057 | |
1058 | /** | |
1059 | * If f is NULL, returns the first registered output format, | |
22e77e44 | 1060 | * if f is non-NULL, returns the next registered output format after f |
aeedac95 SS |
1061 | * or NULL if f is the last one. |
1062 | */ | |
84be6e72 | 1063 | AVOutputFormat *av_oformat_next(AVOutputFormat *f); |
de6d9b64 | 1064 | |
a9bf9d8e AK |
1065 | #if FF_API_GUESS_IMG2_CODEC |
1066 | attribute_deprecated enum CodecID av_guess_image2_codec(const char *filename); | |
1067 | #endif | |
290c5fa6 | 1068 | |
22e77e44 DB |
1069 | /* XXX: Use automatic init with either ELF sections or C file parser */ |
1070 | /* modules. */ | |
de6d9b64 | 1071 | |
b9a281db | 1072 | /* utils.c */ |
b9a281db FB |
1073 | void av_register_input_format(AVInputFormat *format); |
1074 | void av_register_output_format(AVOutputFormat *format); | |
f48b0fa2 SS |
1075 | |
1076 | /** | |
49bd8e4b MR |
1077 | * Return the output format in the list of registered output formats |
1078 | * which best matches the provided parameters, or return NULL if | |
f48b0fa2 SS |
1079 | * there is no match. |
1080 | * | |
1081 | * @param short_name if non-NULL checks if short_name matches with the | |
1082 | * names of the registered formats | |
1083 | * @param filename if non-NULL checks if filename terminates with the | |
1084 | * extensions of the registered formats | |
1085 | * @param mime_type if non-NULL checks if mime_type matches with the | |
1086 | * MIME type of the registered formats | |
1087 | */ | |
a1f547b9 | 1088 | AVOutputFormat *av_guess_format(const char *short_name, |
94b1f338 SS |
1089 | const char *filename, |
1090 | const char *mime_type); | |
3217cb42 PI |
1091 | |
1092 | /** | |
49bd8e4b | 1093 | * Guess the codec ID based upon muxer and filename. |
3217cb42 | 1094 | */ |
115329f1 | 1095 | enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, |
78cb7273 | 1096 | const char *filename, const char *mime_type, |
72415b2a | 1097 | enum AVMediaType type); |
de6d9b64 | 1098 | |
3217cb42 | 1099 | /** |
49bd8e4b | 1100 | * Send a nice hexadecimal dump of a buffer to the specified file stream. |
750f0e1f PI |
1101 | * |
1102 | * @param f The file stream pointer where the dump should be sent to. | |
3217cb42 PI |
1103 | * @param buf buffer |
1104 | * @param size buffer size | |
750f0e1f | 1105 | * |
863c4716 | 1106 | * @see av_hex_dump_log, av_pkt_dump2, av_pkt_dump_log2 |
3217cb42 | 1107 | */ |
fb2758c8 | 1108 | void av_hex_dump(FILE *f, uint8_t *buf, int size); |
3217cb42 PI |
1109 | |
1110 | /** | |
49bd8e4b | 1111 | * Send a nice hexadecimal dump of a buffer to the log. |
750f0e1f PI |
1112 | * |
1113 | * @param avcl A pointer to an arbitrary struct of which the first field is a | |
1114 | * pointer to an AVClass struct. | |
1115 | * @param level The importance level of the message, lower values signifying | |
1116 | * higher importance. | |
1117 | * @param buf buffer | |
1118 | * @param size buffer size | |
1119 | * | |
863c4716 | 1120 | * @see av_hex_dump, av_pkt_dump2, av_pkt_dump_log2 |
750f0e1f PI |
1121 | */ |
1122 | void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size); | |
1123 | ||
1124 | /** | |
49bd8e4b | 1125 | * Send a nice dump of a packet to the specified file stream. |
750f0e1f PI |
1126 | * |
1127 | * @param f The file stream pointer where the dump should be sent to. | |
3217cb42 | 1128 | * @param pkt packet to dump |
4f57fa8c | 1129 | * @param dump_payload True if the payload must be displayed, too. |
863c4716 | 1130 | * @param st AVStream that the packet belongs to |
3217cb42 | 1131 | */ |
863c4716 MS |
1132 | void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st); |
1133 | ||
de6d9b64 | 1134 | |
750f0e1f | 1135 | /** |
49bd8e4b | 1136 | * Send a nice dump of a packet to the log. |
750f0e1f PI |
1137 | * |
1138 | * @param avcl A pointer to an arbitrary struct of which the first field is a | |
1139 | * pointer to an AVClass struct. | |
1140 | * @param level The importance level of the message, lower values signifying | |
1141 | * higher importance. | |
1142 | * @param pkt packet to dump | |
4f57fa8c | 1143 | * @param dump_payload True if the payload must be displayed, too. |
863c4716 | 1144 | * @param st AVStream that the packet belongs to |
750f0e1f | 1145 | */ |
863c4716 MS |
1146 | void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload, |
1147 | AVStream *st); | |
1148 | ||
c5704b2b AK |
1149 | #if FF_API_PKT_DUMP |
1150 | attribute_deprecated void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload); | |
863c4716 MS |
1151 | attribute_deprecated void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, |
1152 | int dump_payload); | |
17ca374c | 1153 | #endif |
750f0e1f | 1154 | |
4815e246 | 1155 | /** |
49bd8e4b | 1156 | * Initialize libavformat and register all the muxers, demuxers and |
4815e246 SS |
1157 | * protocols. If you do not call this function, then you can select |
1158 | * exactly which formats you want to support. | |
1159 | * | |
1160 | * @see av_register_input_format() | |
1161 | * @see av_register_output_format() | |
5d377501 | 1162 | * @see av_register_protocol() |
4815e246 | 1163 | */ |
94988531 | 1164 | void av_register_all(void); |
de6d9b64 | 1165 | |
7693b93e | 1166 | /** |
49bd8e4b | 1167 | * Get the CodecID for the given codec tag tag. |
7693b93e SS |
1168 | * If no codec id is found returns CODEC_ID_NONE. |
1169 | * | |
1170 | * @param tags list of supported codec_id-codec_tag pairs, as stored | |
1171 | * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag | |
1172 | */ | |
15545a09 | 1173 | enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag); |
7693b93e SS |
1174 | |
1175 | /** | |
49bd8e4b | 1176 | * Get the codec tag for the given codec id id. |
7693b93e SS |
1177 | * If no codec tag is found returns 0. |
1178 | * | |
1179 | * @param tags list of supported codec_id-codec_tag pairs, as stored | |
1180 | * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag | |
1181 | */ | |
15545a09 | 1182 | unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id); |
7caf0cc6 | 1183 | |
b9a281db | 1184 | /* media file input */ |
3217cb42 PI |
1185 | |
1186 | /** | |
49bd8e4b | 1187 | * Find AVInputFormat based on the short name of the input format. |
3217cb42 | 1188 | */ |
b9a281db | 1189 | AVInputFormat *av_find_input_format(const char *short_name); |
3217cb42 PI |
1190 | |
1191 | /** | |
49bd8e4b | 1192 | * Guess the file format. |
3217cb42 | 1193 | * |
4f57fa8c DB |
1194 | * @param is_opened Whether the file is already opened; determines whether |
1195 | * demuxers with or without AVFMT_NOFILE are probed. | |
3217cb42 | 1196 | */ |
94988531 | 1197 | AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened); |
3217cb42 PI |
1198 | |
1199 | /** | |
49bd8e4b | 1200 | * Guess the file format. |
8e2ee182 RD |
1201 | * |
1202 | * @param is_opened Whether the file is already opened; determines whether | |
1203 | * demuxers with or without AVFMT_NOFILE are probed. | |
c99d506b RD |
1204 | * @param score_max A probe score larger that this is required to accept a |
1205 | * detection, the variable is set to the actual detection | |
1206 | * score afterwards. | |
1207 | * If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended | |
8e2ee182 RD |
1208 | * to retry with a larger probe buffer. |
1209 | */ | |
1210 | AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max); | |
1211 | ||
1212 | /** | |
3940caad AH |
1213 | * Probe a bytestream to determine the input format. Each time a probe returns |
1214 | * with a score that is too low, the probe buffer size is increased and another | |
1215 | * attempt is made. When the maximum probe size is reached, the input format | |
1216 | * with the highest score is returned. | |
1217 | * | |
1218 | * @param pb the bytestream to probe | |
1219 | * @param fmt the input format is put here | |
1220 | * @param filename the filename of the stream | |
1221 | * @param logctx the log context | |
1222 | * @param offset the offset within the bytestream to probe from | |
1223 | * @param max_probe_size the maximum probe buffer size (zero for default) | |
1224 | * @return 0 in case of success, a negative value corresponding to an | |
1225 | * AVERROR code otherwise | |
1226 | */ | |
ae628ec1 | 1227 | int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, |
3940caad AH |
1228 | const char *filename, void *logctx, |
1229 | unsigned int offset, unsigned int max_probe_size); | |
1230 | ||
603b8bc2 | 1231 | #if FF_API_FORMAT_PARAMETERS |
3940caad | 1232 | /** |
49bd8e4b | 1233 | * Allocate all the structures needed to read an input stream. |
3217cb42 | 1234 | * This does not open the needed codecs for decoding the stream[s]. |
603b8bc2 | 1235 | * @deprecated use avformat_open_input instead. |
3217cb42 | 1236 | */ |
603b8bc2 | 1237 | attribute_deprecated int av_open_input_stream(AVFormatContext **ic_ptr, |
ae628ec1 | 1238 | AVIOContext *pb, const char *filename, |
da24c5e3 | 1239 | AVInputFormat *fmt, AVFormatParameters *ap); |
3217cb42 PI |
1240 | |
1241 | /** | |
49bd8e4b | 1242 | * Open a media file as input. The codecs are not opened. Only the file |
3217cb42 PI |
1243 | * header (if present) is read. |
1244 | * | |
4f57fa8c DB |
1245 | * @param ic_ptr The opened media file handle is put here. |
1246 | * @param filename filename to open | |
1247 | * @param fmt If non-NULL, force the file format to use. | |
3217cb42 | 1248 | * @param buf_size optional buffer size (zero if default is OK) |
78cb7273 DB |
1249 | * @param ap Additional parameters needed when opening the file |
1250 | * (NULL if default). | |
4f57fa8c | 1251 | * @return 0 if OK, AVERROR_xxx otherwise |
603b8bc2 AK |
1252 | * |
1253 | * @deprecated use avformat_open_input instead. | |
3217cb42 | 1254 | */ |
603b8bc2 | 1255 | attribute_deprecated int av_open_input_file(AVFormatContext **ic_ptr, const char *filename, |
b9a281db FB |
1256 | AVInputFormat *fmt, |
1257 | int buf_size, | |
1258 | AVFormatParameters *ap); | |
603b8bc2 | 1259 | #endif |
88a28965 | 1260 | |
88808c60 | 1261 | /** |
05e84c95 AK |
1262 | * Open an input stream and read the header. The codecs are not opened. |
1263 | * The stream must be closed with av_close_input_file(). | |
1264 | * | |
1265 | * @param ps Pointer to user-supplied AVFormatContext (allocated by avformat_alloc_context). | |
1266 | * May be a pointer to NULL, in which case an AVFormatContext is allocated by this | |
1267 | * function and written into ps. | |
1268 | * Note that a user-supplied AVFormatContext will be freed on failure. | |
1269 | * @param filename Name of the stream to open. | |
1270 | * @param fmt If non-NULL, this parameter forces a specific input format. | |
1271 | * Otherwise the format is autodetected. | |
1272 | * @param options A dictionary filled with AVFormatContext and demuxer-private options. | |
1273 | * On return this parameter will be destroyed and replaced with a dict containing | |
1274 | * options that were not found. May be NULL. | |
1275 | * | |
1276 | * @return 0 on success, a negative AVERROR on failure. | |
1277 | * | |
1278 | * @note If you want to use custom IO, preallocate the format context and set its pb field. | |
1279 | */ | |
1280 | int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options); | |
1281 | ||
1282 | /** | |
49bd8e4b | 1283 | * Allocate an AVFormatContext. |
f124b087 MS |
1284 | * avformat_free_context() can be used to free the context and everything |
1285 | * allocated by the framework within it. | |
88808c60 | 1286 | */ |
88a28965 | 1287 | AVFormatContext *avformat_alloc_context(void); |
b9a281db | 1288 | |
a67c061e | 1289 | #if FF_API_FORMAT_PARAMETERS |
3217cb42 | 1290 | /** |
49bd8e4b | 1291 | * Read packets of a media file to get stream information. This |
3217cb42 | 1292 | * is useful for file formats with no headers such as MPEG. This |
22e77e44 | 1293 | * function also computes the real framerate in case of MPEG-2 repeat |
3217cb42 PI |
1294 | * frame mode. |
1295 | * The logical file position is not changed by this function; | |
1296 | * examined packets may be buffered for later processing. | |
1297 | * | |
1298 | * @param ic media file handle | |
4f57fa8c DB |
1299 | * @return >=0 if OK, AVERROR_xxx on error |
1300 | * @todo Let the user decide somehow what information is needed so that | |
1301 | * we do not waste time getting stuff the user does not need. | |
a67c061e AK |
1302 | * |
1303 | * @deprecated use avformat_find_stream_info. | |
3217cb42 | 1304 | */ |
3c7fa664 | 1305 | attribute_deprecated |
b9a281db | 1306 | int av_find_stream_info(AVFormatContext *ic); |
a67c061e AK |
1307 | #endif |
1308 | ||
1309 | /** | |
1310 | * Read packets of a media file to get stream information. This | |
1311 | * is useful for file formats with no headers such as MPEG. This | |
1312 | * function also computes the real framerate in case of MPEG-2 repeat | |
1313 | * frame mode. | |
1314 | * The logical file position is not changed by this function; | |
1315 | * examined packets may be buffered for later processing. | |
1316 | * | |
1317 | * @param ic media file handle | |
1318 | * @param options If non-NULL, an ic.nb_streams long array of pointers to | |
1319 | * dictionaries, where i-th member contains options for | |
1320 | * codec corresponding to i-th stream. | |
1321 | * On return each dictionary will be filled with options that were not found. | |
1322 | * @return >=0 if OK, AVERROR_xxx on error | |
1323 | * | |
1324 | * @note this function isn't guaranteed to open all the codecs, so | |
1325 | * options being non-empty at return is a perfectly normal behavior. | |
1326 | * | |
1327 | * @todo Let the user decide somehow what information is needed so that | |
1328 | * we do not waste time getting stuff the user does not need. | |
1329 | */ | |
1330 | int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options); | |
3217cb42 PI |
1331 | |
1332 | /** | |
9128ae08 NG |
1333 | * Find the "best" stream in the file. |
1334 | * The best stream is determined according to various heuristics as the most | |
1335 | * likely to be what the user expects. | |
1336 | * If the decoder parameter is non-NULL, av_find_best_stream will find the | |
1337 | * default decoder for the stream's codec; streams for which no decoder can | |
1338 | * be found are ignored. | |
1339 | * | |
1340 | * @param ic media file handle | |
1341 | * @param type stream type: video, audio, subtitles, etc. | |
1342 | * @param wanted_stream_nb user-requested stream number, | |
1343 | * or -1 for automatic selection | |
1344 | * @param related_stream try to find a stream related (eg. in the same | |
1345 | * program) to this one, or -1 if none | |
1346 | * @param decoder_ret if non-NULL, returns the decoder for the | |
1347 | * selected stream | |
1348 | * @param flags flags; none are currently defined | |
1349 | * @return the non-negative stream number in case of success, | |
1350 | * AVERROR_STREAM_NOT_FOUND if no stream with the requested type | |
1351 | * could be found, | |
1352 | * AVERROR_DECODER_NOT_FOUND if streams were found but no decoder | |
1353 | * @note If av_find_best_stream returns successfully and decoder_ret is not | |
1354 | * NULL, then *decoder_ret is guaranteed to be set to a valid AVCodec. | |
1355 | */ | |
1356 | int av_find_best_stream(AVFormatContext *ic, | |
1357 | enum AVMediaType type, | |
1358 | int wanted_stream_nb, | |
1359 | int related_stream, | |
1360 | AVCodec **decoder_ret, | |
1361 | int flags); | |
1362 | ||
1363 | /** | |
49bd8e4b | 1364 | * Read a transport packet from a media file. |
3217cb42 | 1365 | * |
864ff8c1 | 1366 | * This function is obsolete and should never be used. |
3217cb42 PI |
1367 | * Use av_read_frame() instead. |
1368 | * | |
1369 | * @param s media file handle | |
1370 | * @param pkt is filled | |
4f57fa8c | 1371 | * @return 0 if OK, AVERROR_xxx on error |
3217cb42 | 1372 | */ |
de6d9b64 | 1373 | int av_read_packet(AVFormatContext *s, AVPacket *pkt); |
3217cb42 PI |
1374 | |
1375 | /** | |
49bd8e4b | 1376 | * Return the next frame of a stream. |
4faf628f MN |
1377 | * This function returns what is stored in the file, and does not validate |
1378 | * that what is there are valid frames for the decoder. It will split what is | |
1379 | * stored in the file into frames and return one for each call. It will not | |
1380 | * omit invalid data between valid frames so as to give the decoder the maximum | |
1381 | * information possible for decoding. | |
3217cb42 PI |
1382 | * |
1383 | * The returned packet is valid | |
1384 | * until the next av_read_frame() or until av_close_input_file() and | |
1385 | * must be freed with av_free_packet. For video, the packet contains | |
1386 | * exactly one frame. For audio, it contains an integer number of | |
1387 | * frames if each frame has a known fixed size (e.g. PCM or ADPCM | |
1388 | * data). If the audio frames have a variable size (e.g. MPEG audio), | |
1389 | * then it contains one frame. | |
1390 | * | |
1391 | * pkt->pts, pkt->dts and pkt->duration are always set to correct | |
22e77e44 | 1392 | * values in AVStream.time_base units (and guessed if the format cannot |
4f57fa8c DB |
1393 | * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format |
1394 | * has B-frames, so it is better to rely on pkt->dts if you do not | |
3217cb42 PI |
1395 | * decompress the payload. |
1396 | * | |
4f57fa8c | 1397 | * @return 0 if OK, < 0 on error or end of file |
3217cb42 | 1398 | */ |
fb2758c8 | 1399 | int av_read_frame(AVFormatContext *s, AVPacket *pkt); |
3217cb42 PI |
1400 | |
1401 | /** | |
49bd8e4b | 1402 | * Seek to the keyframe at timestamp. |
3217cb42 PI |
1403 | * 'timestamp' in 'stream_index'. |
1404 | * @param stream_index If stream_index is (-1), a default | |
1405 | * stream is selected, and timestamp is automatically converted | |
1406 | * from AV_TIME_BASE units to the stream specific time_base. | |
4f57fa8c DB |
1407 | * @param timestamp Timestamp in AVStream.time_base units |
1408 | * or, if no stream is specified, in AV_TIME_BASE units. | |
3217cb42 PI |
1409 | * @param flags flags which select direction and seeking mode |
1410 | * @return >= 0 on success | |
1411 | */ | |
78cb7273 DB |
1412 | int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, |
1413 | int flags); | |
3217cb42 PI |
1414 | |
1415 | /** | |
49bd8e4b | 1416 | * Seek to timestamp ts. |
d04768fa MN |
1417 | * Seeking will be done so that the point from which all active streams |
1418 | * can be presented successfully will be closest to ts and within min/max_ts. | |
1419 | * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. | |
1420 | * | |
22e77e44 | 1421 | * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and |
d04768fa | 1422 | * are the file position (this may not be supported by all demuxers). |
22e77e44 | 1423 | * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames |
d04768fa | 1424 | * in the stream with stream_index (this may not be supported by all demuxers). |
22e77e44 DB |
1425 | * Otherwise all timestamps are in units of the stream selected by stream_index |
1426 | * or if stream_index is -1, in AV_TIME_BASE units. | |
1427 | * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as | |
d04768fa MN |
1428 | * keyframes (this may not be supported by all demuxers). |
1429 | * | |
22e77e44 | 1430 | * @param stream_index index of the stream which is used as time base reference |
d04768fa MN |
1431 | * @param min_ts smallest acceptable timestamp |
1432 | * @param ts target timestamp | |
1433 | * @param max_ts largest acceptable timestamp | |
1434 | * @param flags flags | |
32e543f8 | 1435 | * @return >=0 on success, error code otherwise |
998b6f7c | 1436 | * |
8a4d7a30 | 1437 | * @note This is part of the new seek API which is still under construction. |
22e77e44 DB |
1438 | * Thus do not use this yet. It may change at any time, do not expect |
1439 | * ABI compatibility yet! | |
d04768fa MN |
1440 | */ |
1441 | int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags); | |
1442 | ||
1443 | /** | |
49bd8e4b | 1444 | * Start playing a network-based stream (e.g. RTSP stream) at the |
4f57fa8c | 1445 | * current position. |
3217cb42 | 1446 | */ |
fb2758c8 | 1447 | int av_read_play(AVFormatContext *s); |
3217cb42 PI |
1448 | |
1449 | /** | |
49bd8e4b | 1450 | * Pause a network-based stream (e.g. RTSP stream). |
3217cb42 PI |
1451 | * |
1452 | * Use av_read_play() to resume it. | |
1453 | */ | |
fb2758c8 | 1454 | int av_read_pause(AVFormatContext *s); |
3217cb42 PI |
1455 | |
1456 | /** | |
49bd8e4b | 1457 | * Free a AVFormatContext allocated by av_open_input_stream. |
2506fd54 RD |
1458 | * @param s context to free |
1459 | */ | |
1460 | void av_close_input_stream(AVFormatContext *s); | |
1461 | ||
1462 | /** | |
49bd8e4b | 1463 | * Close a media file (but not its codecs). |
3217cb42 PI |
1464 | * |
1465 | * @param s media file handle | |
1466 | */ | |
de6d9b64 | 1467 | void av_close_input_file(AVFormatContext *s); |
3217cb42 PI |
1468 | |
1469 | /** | |
f124b087 MS |
1470 | * Free an AVFormatContext and all its streams. |
1471 | * @param s context to free | |
1472 | */ | |
1473 | void avformat_free_context(AVFormatContext *s); | |
1474 | ||
569129a6 | 1475 | #if FF_API_NEW_STREAM |
f124b087 | 1476 | /** |
49bd8e4b | 1477 | * Add a new stream to a media file. |
3217cb42 PI |
1478 | * |
1479 | * Can only be called in the read_header() function. If the flag | |
1480 | * AVFMTCTX_NOHEADER is in the format context, then new streams | |
1481 | * can be added in read_packet too. | |
1482 | * | |
1483 | * @param s media file handle | |
4f57fa8c | 1484 | * @param id file-format-dependent stream ID |
3217cb42 | 1485 | */ |
569129a6 | 1486 | attribute_deprecated |
b9a281db | 1487 | AVStream *av_new_stream(AVFormatContext *s, int id); |
569129a6 AK |
1488 | #endif |
1489 | ||
1490 | /** | |
1491 | * Add a new stream to a media file. | |
1492 | * | |
1493 | * When demuxing, it is called by the demuxer in read_header(). If the | |
1494 | * flag AVFMTCTX_NOHEADER is set in s.ctx_flags, then it may also | |
1495 | * be called in read_packet(). | |
1496 | * | |
1497 | * When muxing, should be called by the user before avformat_write_header(). | |
1498 | * | |
1499 | * @param c If non-NULL, the AVCodecContext corresponding to the new stream | |
1500 | * will be initialized to use this codec. This is needed for e.g. codec-specific | |
1501 | * defaults to be set, so codec should be provided if it is known. | |
1502 | * | |
1503 | * @return newly created stream or NULL on error. | |
1504 | */ | |
1505 | AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c); | |
1506 | ||
15afa396 | 1507 | AVProgram *av_new_program(AVFormatContext *s, int id); |
3217cb42 PI |
1508 | |
1509 | /** | |
b3190529 RD |
1510 | * Set the pts for a given stream. If the new values would be invalid |
1511 | * (<= 0), it leaves the AVStream unchanged. | |
3217cb42 PI |
1512 | * |
1513 | * @param s stream | |
1514 | * @param pts_wrap_bits number of bits effectively used by the pts | |
1515 | * (used for wrap control, 33 is the value for MPEG) | |
1516 | * @param pts_num numerator to convert to seconds (MPEG: 1) | |
1517 | * @param pts_den denominator to convert to seconds (MPEG: 90000) | |
1518 | */ | |
9ee91c2f | 1519 | void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
dec14949 | 1520 | unsigned int pts_num, unsigned int pts_den); |
de6d9b64 | 1521 | |
3ba1438d MN |
1522 | #define AVSEEK_FLAG_BACKWARD 1 ///< seek backward |
1523 | #define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes | |
4f57fa8c | 1524 | #define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non-keyframes |
2bf74f49 | 1525 | #define AVSEEK_FLAG_FRAME 8 ///< seeking based on frame number |
3ba1438d | 1526 | |
b754978a | 1527 | int av_find_default_stream_index(AVFormatContext *s); |
3217cb42 PI |
1528 | |
1529 | /** | |
49bd8e4b | 1530 | * Get the index for a specific timestamp. |
4f57fa8c DB |
1531 | * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond |
1532 | * to the timestamp which is <= the requested one, if backward | |
1533 | * is 0, then it will be >= | |
3217cb42 PI |
1534 | * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise |
1535 | * @return < 0 if no such timestamp could be found | |
1536 | */ | |
dc56fc38 | 1537 | int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags); |
3217cb42 PI |
1538 | |
1539 | /** | |
49bd8e4b | 1540 | * Add an index entry into a sorted list. Update the entry if the list |
4f57fa8c | 1541 | * already contains it. |
3217cb42 | 1542 | * |
4f57fa8c | 1543 | * @param timestamp timestamp in the time base of the given stream |
3217cb42 | 1544 | */ |
78cb7273 DB |
1545 | int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, |
1546 | int size, int distance, int flags); | |
3217cb42 | 1547 | |
a2faa951 AK |
1548 | #if FF_API_SEEK_PUBLIC |
1549 | attribute_deprecated | |
78cb7273 DB |
1550 | int av_seek_frame_binary(AVFormatContext *s, int stream_index, |
1551 | int64_t target_ts, int flags); | |
a2faa951 | 1552 | attribute_deprecated |
22ffac70 | 1553 | void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp); |
a2faa951 | 1554 | attribute_deprecated |
78cb7273 DB |
1555 | int64_t av_gen_search(AVFormatContext *s, int stream_index, |
1556 | int64_t target_ts, int64_t pos_min, | |
1557 | int64_t pos_max, int64_t pos_limit, | |
1558 | int64_t ts_min, int64_t ts_max, | |
1559 | int flags, int64_t *ts_ret, | |
1560 | int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )); | |
a2faa951 | 1561 | #endif |
b754978a | 1562 | |
76c56376 MN |
1563 | /** |
1564 | * media file output | |
1565 | */ | |
25de5958 AK |
1566 | #if FF_API_FORMAT_PARAMETERS |
1567 | /** | |
1568 | * @deprecated pass the options to avformat_write_header directly. | |
1569 | */ | |
1570 | attribute_deprecated int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap); | |
1571 | #endif | |
3217cb42 PI |
1572 | |
1573 | /** | |
f3bfe388 MR |
1574 | * Split a URL string into components. |
1575 | * | |
1576 | * The pointers to buffers for storing individual components may be null, | |
1577 | * in order to ignore that component. Buffers for components not found are | |
1578 | * set to empty strings. If the port is not found, it is set to a negative | |
1579 | * value. | |
1580 | * | |
1581 | * @param proto the buffer for the protocol | |
1582 | * @param proto_size the size of the proto buffer | |
1583 | * @param authorization the buffer for the authorization | |
1584 | * @param authorization_size the size of the authorization buffer | |
1585 | * @param hostname the buffer for the host name | |
1586 | * @param hostname_size the size of the hostname buffer | |
1587 | * @param port_ptr a pointer to store the port number in | |
1588 | * @param path the buffer for the path | |
1589 | * @param path_size the size of the path buffer | |
1590 | * @param url the URL to split | |
1591 | */ | |
1592 | void av_url_split(char *proto, int proto_size, | |
1593 | char *authorization, int authorization_size, | |
1594 | char *hostname, int hostname_size, | |
1595 | int *port_ptr, | |
1596 | char *path, int path_size, | |
1597 | const char *url); | |
1598 | ||
1599 | /** | |
25de5958 AK |
1600 | * Allocate the stream private data and write the stream header to |
1601 | * an output media file. | |
1602 | * | |
1603 | * @param s Media file handle, must be allocated with avformat_alloc_context(). | |
1604 | * Its oformat field must be set to the desired output format; | |
1605 | * Its pb field must be set to an already openened AVIOContext. | |
1606 | * @param options An AVDictionary filled with AVFormatContext and muxer-private options. | |
1607 | * On return this parameter will be destroyed and replaced with a dict containing | |
1608 | * options that were not found. May be NULL. | |
1609 | * | |
1610 | * @return 0 on success, negative AVERROR on failure. | |
1611 | * | |
1612 | * @see av_opt_find, av_dict_set, avio_open, av_oformat_next. | |
1613 | */ | |
1614 | int avformat_write_header(AVFormatContext *s, AVDictionary **options); | |
1615 | ||
1616 | #if FF_API_FORMAT_PARAMETERS | |
1617 | /** | |
49bd8e4b | 1618 | * Allocate the stream private data and write the stream header to an |
755bfeab | 1619 | * output media file. |
5d820db2 RD |
1620 | * @note: this sets stream time-bases, if possible to stream->codec->time_base |
1621 | * but for some formats it might also be some other time base | |
3217cb42 PI |
1622 | * |
1623 | * @param s media file handle | |
4f57fa8c | 1624 | * @return 0 if OK, AVERROR_xxx on error |
25de5958 AK |
1625 | * |
1626 | * @deprecated use avformat_write_header. | |
3217cb42 | 1627 | */ |
25de5958 AK |
1628 | attribute_deprecated int av_write_header(AVFormatContext *s); |
1629 | #endif | |
3217cb42 PI |
1630 | |
1631 | /** | |
49bd8e4b | 1632 | * Write a packet to an output media file. |
3217cb42 PI |
1633 | * |
1634 | * The packet shall contain one audio or video frame. | |
78cb7273 DB |
1635 | * The packet must be correctly interleaved according to the container |
1636 | * specification, if not then av_interleaved_write_frame must be used. | |
3217cb42 PI |
1637 | * |
1638 | * @param s media file handle | |
78cb7273 DB |
1639 | * @param pkt The packet, which contains the stream_index, buf/buf_size, |
1640 | dts/pts, ... | |
4f57fa8c | 1641 | * @return < 0 on error, = 0 if OK, 1 if end of stream wanted |
3217cb42 | 1642 | */ |
e928649b | 1643 | int av_write_frame(AVFormatContext *s, AVPacket *pkt); |
3217cb42 PI |
1644 | |
1645 | /** | |
49bd8e4b | 1646 | * Write a packet to an output media file ensuring correct interleaving. |
3217cb42 PI |
1647 | * |
1648 | * The packet must contain one audio or video frame. | |
22e77e44 | 1649 | * If the packets are already correctly interleaved, the application should |
90b5b51e DB |
1650 | * call av_write_frame() instead as it is slightly faster. It is also important |
1651 | * to keep in mind that completely non-interleaved input will need huge amounts | |
1652 | * of memory to interleave with this, so it is preferable to interleave at the | |
1653 | * demuxer level. | |
3217cb42 PI |
1654 | * |
1655 | * @param s media file handle | |
78cb7273 DB |
1656 | * @param pkt The packet, which contains the stream_index, buf/buf_size, |
1657 | dts/pts, ... | |
4f57fa8c | 1658 | * @return < 0 on error, = 0 if OK, 1 if end of stream wanted |
3217cb42 | 1659 | */ |
3c895fc0 | 1660 | int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt); |
3217cb42 PI |
1661 | |
1662 | /** | |
49bd8e4b | 1663 | * Interleave a packet per dts in an output media file. |
3217cb42 | 1664 | * |
78cb7273 | 1665 | * Packets with pkt->destruct == av_destruct_packet will be freed inside this |
22e77e44 | 1666 | * function, so they cannot be used after it. Note that calling av_free_packet() |
78cb7273 | 1667 | * on them is still safe. |
3217cb42 PI |
1668 | * |
1669 | * @param s media file handle | |
1670 | * @param out the interleaved packet will be output here | |
9a58234f | 1671 | * @param pkt the input packet |
3217cb42 PI |
1672 | * @param flush 1 if no further packets are available as input and all |
1673 | * remaining packets should be output | |
1674 | * @return 1 if a packet was output, 0 if no packet could be output, | |
d9526386 | 1675 | * < 0 if an error occurred |
3217cb42 | 1676 | */ |
78cb7273 DB |
1677 | int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, |
1678 | AVPacket *pkt, int flush); | |
e928649b | 1679 | |
3217cb42 | 1680 | /** |
49bd8e4b | 1681 | * Write the stream trailer to an output media file and free the |
2b75bde6 | 1682 | * file private data. |
3217cb42 | 1683 | * |
dc76fe13 RD |
1684 | * May only be called after a successful call to av_write_header. |
1685 | * | |
3217cb42 | 1686 | * @param s media file handle |
4f57fa8c | 1687 | * @return 0 if OK, AVERROR_xxx on error |
3217cb42 | 1688 | */ |
b9a281db | 1689 | int av_write_trailer(AVFormatContext *s); |
de6d9b64 | 1690 | |
610219a5 AK |
1691 | #if FF_API_DUMP_FORMAT |
1692 | attribute_deprecated void dump_format(AVFormatContext *ic, | |
1693 | int index, | |
1694 | const char *url, | |
1695 | int is_output); | |
1696 | #endif | |
1697 | ||
1698 | void av_dump_format(AVFormatContext *ic, | |
1699 | int index, | |
1700 | const char *url, | |
1701 | int is_output); | |
3217cb42 | 1702 | |
f6c7375a | 1703 | #if FF_API_PARSE_DATE |
3217cb42 | 1704 | /** |
49bd8e4b | 1705 | * Parse datestr and return a corresponding number of microseconds. |
f6c7375a | 1706 | * |
f9436161 | 1707 | * @param datestr String representing a date or a duration. |
f6c7375a SS |
1708 | * See av_parse_time() for the syntax of the provided string. |
1709 | * @deprecated in favor of av_parse_time() | |
3217cb42 | 1710 | */ |
f6c7375a | 1711 | attribute_deprecated |
0c1a9eda | 1712 | int64_t parse_date(const char *datestr, int duration); |
f6c7375a | 1713 | #endif |
de6d9b64 | 1714 | |
76c56376 MN |
1715 | /** |
1716 | * Get the current time in microseconds. | |
1717 | */ | |
0c1a9eda | 1718 | int64_t av_gettime(void); |
94988531 | 1719 | |
ab0287fc | 1720 | #if FF_API_FIND_INFO_TAG |
3217cb42 | 1721 | /** |
ab0287fc | 1722 | * @deprecated use av_find_info_tag in libavutil instead. |
3217cb42 | 1723 | */ |
ab0287fc AK |
1724 | attribute_deprecated int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info); |
1725 | #endif | |
de6d9b64 | 1726 | |
3217cb42 | 1727 | /** |
49bd8e4b | 1728 | * Return in 'buf' the path with '%d' replaced by a number. |
4f57fa8c | 1729 | * |
3217cb42 PI |
1730 | * Also handles the '%0nd' format where 'n' is the total number |
1731 | * of digits and '%%'. | |
1732 | * | |
1733 | * @param buf destination buffer | |
1734 | * @param buf_size destination buffer size | |
1735 | * @param path numbered sequence string | |
8ea0e802 | 1736 | * @param number frame number |
4f57fa8c | 1737 | * @return 0 if OK, -1 on format error |
3217cb42 | 1738 | */ |
5c07cf53 MB |
1739 | int av_get_frame_filename(char *buf, int buf_size, |
1740 | const char *path, int number); | |
3217cb42 PI |
1741 | |
1742 | /** | |
49bd8e4b | 1743 | * Check whether filename actually is a numbered sequence generator. |
3217cb42 PI |
1744 | * |
1745 | * @param filename possible numbered sequence string | |
4f57fa8c | 1746 | * @return 1 if a valid numbered sequence string, 0 otherwise |
3217cb42 | 1747 | */ |
5c07cf53 | 1748 | int av_filename_number_test(const char *filename); |
96baaa6a | 1749 | |
c5388c07 | 1750 | /** |
49bd8e4b | 1751 | * Generate an SDP for an RTP session. |
c5388c07 LA |
1752 | * |
1753 | * @param ac array of AVFormatContexts describing the RTP streams. If the | |
1754 | * array is composed by only one context, such context can contain | |
1755 | * multiple AVStreams (one AVStream per RTP stream). Otherwise, | |
1756 | * all the contexts in the array (an AVCodecContext per RTP stream) | |
4f57fa8c | 1757 | * must contain only one AVStream. |
8767b80f | 1758 | * @param n_files number of AVCodecContexts contained in ac |
c234d40b AK |
1759 | * @param buf buffer where the SDP will be stored (must be allocated by |
1760 | * the caller) | |
8767b80f | 1761 | * @param size the size of the buffer |
4f57fa8c | 1762 | * @return 0 if OK, AVERROR_xxx on error |
c5388c07 | 1763 | */ |
c234d40b | 1764 | int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size); |
c3675dfe AK |
1765 | |
1766 | #if FF_API_SDP_CREATE | |
1767 | attribute_deprecated int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size); | |
1768 | #endif | |
c5388c07 | 1769 | |
1a70d127 | 1770 | /** |
49bd8e4b | 1771 | * Return a positive value if the given filename has one of the given |
1a70d127 SS |
1772 | * extensions, 0 otherwise. |
1773 | * | |
1774 | * @param extensions a comma-separated list of filename extensions | |
1775 | */ | |
1776 | int av_match_ext(const char *filename, const char *extensions); | |
1777 | ||
48f9e457 AK |
1778 | /** |
1779 | * Test if the given container can store a codec. | |
1780 | * | |
1781 | * @param std_compliance standards compliance level, one of FF_COMPLIANCE_* | |
1782 | * | |
1783 | * @return 1 if codec with ID codec_id can be stored in ofmt, 0 if it cannot. | |
1784 | * A negative number if this information is not available. | |
1785 | */ | |
1786 | int avformat_query_codec(AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance); | |
1787 | ||
fb4ca26b AK |
1788 | /** |
1789 | * Get the AVClass for AVFormatContext. It can be used in combination with | |
1790 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. | |
1791 | * | |
1792 | * @see av_opt_find(). | |
1793 | */ | |
1794 | const AVClass *avformat_get_class(void); | |
1795 | ||
b6d08f40 MS |
1796 | /** |
1797 | * Do global initialization of network components. This is optional, | |
1798 | * but recommended, since it avoids the overhead of implicitly | |
1799 | * doing the setup for each session. | |
1800 | * | |
87892ef8 MS |
1801 | * Calling this function will become mandatory if using network |
1802 | * protocols at some major version bump. | |
b6d08f40 MS |
1803 | */ |
1804 | int avformat_network_init(void); | |
1805 | ||
1806 | /** | |
1807 | * Undo the initialization done by avformat_network_init. | |
1808 | */ | |
1809 | int avformat_network_deinit(void); | |
1810 | ||
98790382 | 1811 | #endif /* AVFORMAT_AVFORMAT_H */ |