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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 | |
e361b508 | 24 | /** |
eca06cbe AK |
25 | * @file |
26 | * @ingroup libavf | |
27 | * Main libavformat public API header | |
28 | */ | |
29 | ||
30 | /** | |
e361b508 LB |
31 | * @defgroup libavf I/O and Muxing/Demuxing Library |
32 | * @{ | |
33 | * | |
ccbc1068 AK |
34 | * Libavformat (lavf) is a library for dealing with various media container |
35 | * formats. Its main two purposes are demuxing - i.e. splitting a media file | |
36 | * into component streams, and the reverse process of muxing - writing supplied | |
37 | * data in a specified container format. It also has an @ref lavf_io | |
38 | * "I/O module" which supports a number of protocols for accessing the data (e.g. | |
39 | * file, tcp, http and others). Before using lavf, you need to call | |
40 | * av_register_all() to register all compiled muxers, demuxers and protocols. | |
41 | * Unless you are absolutely sure you won't use libavformat's network | |
42 | * capabilities, you should also call avformat_network_init(). | |
43 | * | |
44 | * A supported input format is described by an AVInputFormat struct, conversely | |
45 | * an output format is described by AVOutputFormat. You can iterate over all | |
46 | * registered input/output formats using the av_iformat_next() / | |
47 | * av_oformat_next() functions. The protocols layer is not part of the public | |
48 | * API, so you can only get the names of supported protocols with the | |
49 | * avio_enum_protocols() function. | |
50 | * | |
51 | * Main lavf structure used for both muxing and demuxing is AVFormatContext, | |
52 | * which exports all information about the file being read or written. As with | |
53 | * most Libav structures, its size is not part of public ABI, so it cannot be | |
54 | * allocated on stack or directly with av_malloc(). To create an | |
55 | * AVFormatContext, use avformat_alloc_context() (some functions, like | |
56 | * avformat_open_input() might do that for you). | |
57 | * | |
58 | * Most importantly an AVFormatContext contains: | |
59 | * @li the @ref AVFormatContext.iformat "input" or @ref AVFormatContext.oformat | |
60 | * "output" format. It is either autodetected or set by user for input; | |
61 | * always set by user for output. | |
62 | * @li an @ref AVFormatContext.streams "array" of AVStreams, which describe all | |
63 | * elementary streams stored in the file. AVStreams are typically referred to | |
64 | * using their index in this array. | |
65 | * @li an @ref AVFormatContext.pb "I/O context". It is either opened by lavf or | |
66 | * set by user for input, always set by user for output (unless you are dealing | |
67 | * with an AVFMT_NOFILE format). | |
68 | * | |
10fa4ff7 AK |
69 | * @section lavf_options Passing options to (de)muxers |
70 | * Lavf allows to configure muxers and demuxers using the @ref avoptions | |
71 | * mechanism. Generic (format-independent) libavformat options are provided by | |
72 | * AVFormatContext, they can be examined from a user program by calling | |
73 | * av_opt_next() / av_opt_find() on an allocated AVFormatContext (or its AVClass | |
74 | * from avformat_get_class()). Private (format-specific) options are provided by | |
75 | * AVFormatContext.priv_data if and only if AVInputFormat.priv_class / | |
76 | * AVOutputFormat.priv_class of the corresponding format struct is non-NULL. | |
77 | * Further options may be provided by the @ref AVFormatContext.pb "I/O context", | |
78 | * if its AVClass is non-NULL, and the protocols layer. See the discussion on | |
79 | * nesting in @ref avoptions documentation to learn how to access those. | |
80 | * | |
e361b508 LB |
81 | * @defgroup lavf_decoding Demuxing |
82 | * @{ | |
59826cab | 83 | * Demuxers read a media file and split it into chunks of data (@em packets). A |
dca9c81d AK |
84 | * @ref AVPacket "packet" contains one or more encoded frames which belongs to a |
85 | * single elementary stream. In the lavf API this process is represented by the | |
59826cab AK |
86 | * avformat_open_input() function for opening a file, av_read_frame() for |
87 | * reading a single packet and finally avformat_close_input(), which does the | |
88 | * cleanup. | |
89 | * | |
90 | * @section lavf_decoding_open Opening a media file | |
91 | * The minimum information required to open a file is its URL or filename, which | |
92 | * is passed to avformat_open_input(), as in the following code: | |
93 | * @code | |
94 | * const char *url = "in.mp3"; | |
95 | * AVFormatContext *s = NULL; | |
96 | * int ret = avformat_open_input(&s, url, NULL, NULL); | |
97 | * if (ret < 0) | |
98 | * abort(); | |
99 | * @endcode | |
100 | * The above code attempts to allocate an AVFormatContext, open the | |
101 | * specified file (autodetecting the format) and read the header, exporting the | |
102 | * information stored there into s. Some formats do not have a header or do not | |
103 | * store enough information there, so it is recommended that you call the | |
104 | * avformat_find_stream_info() function which tries to read and decode a few | |
105 | * frames to find missing information. | |
106 | * | |
107 | * In some cases you might want to preallocate an AVFormatContext yourself with | |
108 | * avformat_alloc_context() and do some tweaking on it before passing it to | |
109 | * avformat_open_input(). One such case is when you want to use custom functions | |
110 | * for reading input data instead of lavf internal I/O layer. | |
111 | * To do that, create your own AVIOContext with avio_alloc_context(), passing | |
112 | * your reading callbacks to it. Then set the @em pb field of your | |
113 | * AVFormatContext to newly created AVIOContext. | |
114 | * | |
10fa4ff7 AK |
115 | * Since the format of the opened file is in general not known until after |
116 | * avformat_open_input() has returned, it is not possible to set demuxer private | |
117 | * options on a preallocated context. Instead, the options should be passed to | |
118 | * avformat_open_input() wrapped in an AVDictionary: | |
119 | * @code | |
120 | * AVDictionary *options = NULL; | |
121 | * av_dict_set(&options, "video_size", "640x480", 0); | |
122 | * av_dict_set(&options, "pixel_format", "rgb24", 0); | |
123 | * | |
124 | * if (avformat_open_input(&s, url, NULL, &options) < 0) | |
125 | * abort(); | |
126 | * av_dict_free(&options); | |
127 | * @endcode | |
128 | * This code passes the private options 'video_size' and 'pixel_format' to the | |
129 | * demuxer. They would be necessary for e.g. the rawvideo demuxer, since it | |
130 | * cannot know how to interpret raw video data otherwise. If the format turns | |
131 | * out to be something different than raw video, those options will not be | |
132 | * recognized by the demuxer and therefore will not be applied. Such unrecognized | |
133 | * options are then returned in the options dictionary (recognized options are | |
134 | * consumed). The calling program can handle such unrecognized options as it | |
135 | * wishes, e.g. | |
136 | * @code | |
137 | * AVDictionaryEntry *e; | |
138 | * if (e = av_dict_get(options, "", NULL, AV_DICT_IGNORE_SUFFIX)) { | |
139 | * fprintf(stderr, "Option %s not recognized by the demuxer.\n", e->key); | |
140 | * abort(); | |
141 | * } | |
142 | * @endcode | |
143 | * | |
59826cab AK |
144 | * After you have finished reading the file, you must close it with |
145 | * avformat_close_input(). It will free everything associated with the file. | |
146 | * | |
147 | * @section lavf_decoding_read Reading from an opened file | |
f58b8cc3 AK |
148 | * Reading data from an opened AVFormatContext is done by repeatedly calling |
149 | * av_read_frame() on it. Each call, if successful, will return an AVPacket | |
150 | * containing encoded data for one AVStream, identified by | |
151 | * AVPacket.stream_index. This packet may be passed straight into the libavcodec | |
152 | * decoding functions avcodec_decode_video2(), avcodec_decode_audio4() or | |
153 | * avcodec_decode_subtitle2() if the caller wishes to decode the data. | |
154 | * | |
155 | * AVPacket.pts, AVPacket.dts and AVPacket.duration timing information will be | |
156 | * set if known. They may also be unset (i.e. AV_NOPTS_VALUE for | |
157 | * pts/dts, 0 for duration) if the stream does not provide them. The timing | |
158 | * information will be in AVStream.time_base units, i.e. it has to be | |
159 | * multiplied by the timebase to convert them to seconds. | |
160 | * | |
1afddbe5 | 161 | * If AVPacket.buf is set on the returned packet, then the packet is |
717a4509 | 162 | * allocated dynamically and the user may keep it indefinitely. |
1afddbe5 | 163 | * Otherwise, if AVPacket.buf is NULL, the packet data is backed by a |
717a4509 AK |
164 | * static storage somewhere inside the demuxer and the packet is only valid |
165 | * until the next av_read_frame() call or closing the file. If the caller | |
166 | * requires a longer lifetime, av_dup_packet() will make an av_malloc()ed copy | |
167 | * of it. | |
168 | * In both cases, the packet must be freed with av_free_packet() when it is no | |
169 | * longer needed. | |
59826cab AK |
170 | * |
171 | * @section lavf_decoding_seek Seeking | |
e361b508 LB |
172 | * @} |
173 | * | |
174 | * @defgroup lavf_encoding Muxing | |
175 | * @{ | |
54f7e79d AK |
176 | * Muxers take encoded data in the form of @ref AVPacket "AVPackets" and write |
177 | * it into files or other output bytestreams in the specified container format. | |
178 | * | |
179 | * The main API functions for muxing are avformat_write_header() for writing the | |
180 | * file header, av_write_frame() / av_interleaved_write_frame() for writing the | |
181 | * packets and av_write_trailer() for finalizing the file. | |
182 | * | |
183 | * At the beginning of the muxing process, the caller must first call | |
184 | * avformat_alloc_context() to create a muxing context. The caller then sets up | |
185 | * the muxer by filling the various fields in this context: | |
186 | * | |
187 | * - The @ref AVFormatContext.oformat "oformat" field must be set to select the | |
188 | * muxer that will be used. | |
189 | * - Unless the format is of the AVFMT_NOFILE type, the @ref AVFormatContext.pb | |
190 | * "pb" field must be set to an opened IO context, either returned from | |
191 | * avio_open2() or a custom one. | |
192 | * - Unless the format is of the AVFMT_NOSTREAMS type, at least one stream must | |
193 | * be created with the avformat_new_stream() function. The caller should fill | |
194 | * the @ref AVStream.codec "stream codec context" information, such as the | |
195 | * codec @ref AVCodecContext.codec_type "type", @ref AVCodecContext.codec_id | |
196 | * "id" and other parameters (e.g. width / height, the pixel or sample format, | |
197 | * etc.) as known. The @ref AVCodecContext.time_base "codec timebase" should | |
198 | * be set to the timebase that the caller desires to use for this stream (note | |
199 | * that the timebase actually used by the muxer can be different, as will be | |
200 | * described later). | |
201 | * - The caller may fill in additional information, such as @ref | |
202 | * AVFormatContext.metadata "global" or @ref AVStream.metadata "per-stream" | |
203 | * metadata, @ref AVFormatContext.chapters "chapters", @ref | |
204 | * AVFormatContext.programs "programs", etc. as described in the | |
205 | * AVFormatContext documentation. Whether such information will actually be | |
206 | * stored in the output depends on what the container format and the muxer | |
207 | * support. | |
208 | * | |
209 | * When the muxing context is fully set up, the caller must call | |
210 | * avformat_write_header() to initialize the muxer internals and write the file | |
211 | * header. Whether anything actually is written to the IO context at this step | |
212 | * depends on the muxer, but this function must always be called. Any muxer | |
213 | * private options must be passed in the options parameter to this function. | |
214 | * | |
215 | * The data is then sent to the muxer by repeatedly calling av_write_frame() or | |
216 | * av_interleaved_write_frame() (consult those functions' documentation for | |
217 | * discussion on the difference between them; only one of them may be used with | |
218 | * a single muxing context, they should not be mixed). Do note that the timing | |
219 | * information on the packets sent to the muxer must be in the corresponding | |
220 | * AVStream's timebase. That timebase is set by the muxer (in the | |
221 | * avformat_write_header() step) and may be different from the timebase the | |
222 | * caller set on the codec context. | |
223 | * | |
224 | * Once all the data has been written, the caller must call av_write_trailer() | |
225 | * to flush any buffered packets and finalize the output file, then close the IO | |
226 | * context (if any) and finally free the muxing context with | |
227 | * avformat_free_context(). | |
e361b508 LB |
228 | * @} |
229 | * | |
e4f4a1f9 | 230 | * @defgroup lavf_io I/O Read/Write |
e361b508 LB |
231 | * @{ |
232 | * @} | |
233 | * | |
234 | * @defgroup lavf_codec Demuxers | |
235 | * @{ | |
236 | * @defgroup lavf_codec_native Native Demuxers | |
237 | * @{ | |
238 | * @} | |
239 | * @defgroup lavf_codec_wrappers External library wrappers | |
240 | * @{ | |
241 | * @} | |
242 | * @} | |
243 | * @defgroup lavf_protos I/O Protocols | |
244 | * @{ | |
245 | * @} | |
246 | * @defgroup lavf_internal Internal | |
247 | * @{ | |
248 | * @} | |
249 | * @} | |
250 | * | |
251 | */ | |
072e3efd | 252 | |
f71869a4 | 253 | #include <time.h> |
67070e4f | 254 | #include <stdio.h> /* FILE */ |
76a448ed | 255 | #include "libavcodec/avcodec.h" |
d9f80ea2 | 256 | #include "libavutil/dict.h" |
abc78a5a | 257 | #include "libavutil/log.h" |
de6d9b64 | 258 | |
de6d9b64 | 259 | #include "avio.h" |
50196a98 | 260 | #include "libavformat/version.h" |
de6d9b64 | 261 | |
f610a9f2 AJ |
262 | struct AVFormatContext; |
263 | ||
a6d18a0e | 264 | |
1a53a438 RT |
265 | /** |
266 | * @defgroup metadata_api Public Metadata API | |
267 | * @{ | |
b262a059 | 268 | * @ingroup libavf |
ea29242c | 269 | * The metadata API allows libavformat to export metadata tags to a client |
28b4c06b AK |
270 | * application when demuxing. Conversely it allows a client application to |
271 | * set metadata when muxing. | |
272 | * | |
273 | * Metadata is exported or set as pairs of key/value strings in the 'metadata' | |
274 | * fields of the AVFormatContext, AVStream, AVChapter and AVProgram structs | |
275 | * using the @ref lavu_dict "AVDictionary" API. Like all strings in Libav, | |
276 | * metadata is assumed to be UTF-8 encoded Unicode. Note that metadata | |
61648423 | 277 | * exported by demuxers isn't checked to be valid UTF-8 in most cases. |
28b4c06b | 278 | * |
ea29242c | 279 | * Important concepts to keep in mind: |
1a53a438 | 280 | * - Keys are unique; there can never be 2 tags with the same key. This is |
ea29242c MM |
281 | * also meant semantically, i.e., a demuxer should not knowingly produce |
282 | * several keys that are literally different but semantically identical. | |
283 | * E.g., key=Author5, key=Author6. In this example, all authors must be | |
284 | * placed in the same tag. | |
1a53a438 | 285 | * - Metadata is flat, not hierarchical; there are no subtags. If you |
ea29242c MM |
286 | * want to store, e.g., the email address of the child of producer Alice |
287 | * and actor Bob, that could have key=alice_and_bobs_childs_email_address. | |
1a53a438 | 288 | * - Several modifiers can be applied to the tag name. This is done by |
ca76a119 AK |
289 | * appending a dash character ('-') and the modifier name in the order |
290 | * they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng. | |
1a53a438 | 291 | * - language -- a tag whose value is localized for a particular language |
ca76a119 AK |
292 | * is appended with the ISO 639-2/B 3-letter language code. |
293 | * For example: Author-ger=Michael, Author-eng=Mike | |
294 | * The original/default language is in the unqualified "Author" tag. | |
295 | * A demuxer should set a default if it sets any translated tag. | |
1a53a438 | 296 | * - sorting -- a modified version of a tag that should be used for |
ca76a119 AK |
297 | * sorting will have '-sort' appended. E.g. artist="The Beatles", |
298 | * artist-sort="Beatles, The". | |
299 | * | |
1a53a438 | 300 | * - Demuxers attempt to export metadata in a generic format, however tags |
03700d39 AK |
301 | * with no generic equivalents are left as they are stored in the container. |
302 | * Follows a list of generic tag names: | |
ca76a119 | 303 | * |
1a53a438 RT |
304 | @verbatim |
305 | album -- name of the set this work belongs to | |
306 | album_artist -- main creator of the set/album, if different from artist. | |
307 | e.g. "Various Artists" for compilation albums. | |
308 | artist -- main creator of the work | |
309 | comment -- any additional description of the file. | |
310 | composer -- who composed the work, if different from artist. | |
311 | copyright -- name of copyright holder. | |
312 | creation_time-- date when the file was created, preferably in ISO 8601. | |
313 | date -- date when the work was created, preferably in ISO 8601. | |
314 | disc -- number of a subset, e.g. disc in a multi-disc collection. | |
315 | encoder -- name/settings of the software/hardware that produced the file. | |
316 | encoded_by -- person/group who created the file. | |
317 | filename -- original name of the file. | |
318 | genre -- <self-evident>. | |
319 | language -- main language in which the work is performed, preferably | |
320 | in ISO 639-2 format. Multiple languages can be specified by | |
321 | separating them with commas. | |
322 | performer -- artist who performed the work, if different from artist. | |
323 | E.g for "Also sprach Zarathustra", artist would be "Richard | |
324 | Strauss" and performer "London Philharmonic Orchestra". | |
325 | publisher -- name of the label/publisher. | |
326 | service_name -- name of the service in broadcasting (channel name). | |
327 | service_provider -- name of the service provider in broadcasting. | |
328 | title -- name of the work. | |
329 | track -- number of this work in the set, can be in form current/total. | |
330 | variant_bitrate -- the total bitrate of the bitrate variant that the current stream is part of | |
331 | @endverbatim | |
332 | * | |
12489443 RT |
333 | * Look in the examples section for an application example how to use the Metadata API. |
334 | * | |
1a53a438 | 335 | * @} |
a6d18a0e MN |
336 | */ |
337 | ||
de6d9b64 FB |
338 | /* packet functions */ |
339 | ||
3217cb42 PI |
340 | |
341 | /** | |
49bd8e4b | 342 | * Allocate and read the payload of a packet and initialize its |
d1b9adf2 | 343 | * fields with default values. |
3217cb42 PI |
344 | * |
345 | * @param pkt packet | |
4f57fa8c DB |
346 | * @param size desired payload size |
347 | * @return >0 (read size) if OK, AVERROR_xxx otherwise | |
3217cb42 | 348 | */ |
ae628ec1 | 349 | int av_get_packet(AVIOContext *s, AVPacket *pkt, int size); |
3217cb42 | 350 | |
de6d9b64 | 351 | |
6bfc2683 | 352 | /** |
fa8cc126 RD |
353 | * Read data and append it to the current content of the AVPacket. |
354 | * If pkt->size is 0 this is identical to av_get_packet. | |
6bfc2683 RD |
355 | * Note that this uses av_grow_packet and thus involves a realloc |
356 | * which is inefficient. Thus this function should only be used | |
357 | * when there is no reasonable way to know (an upper bound of) | |
358 | * the final size. | |
359 | * | |
360 | * @param pkt packet | |
361 | * @param size amount of data to read | |
362 | * @return >0 (read size) if OK, AVERROR_xxx otherwise, previous data | |
363 | * will not be lost even if an error occurs. | |
364 | */ | |
ae628ec1 | 365 | int av_append_packet(AVIOContext *s, AVPacket *pkt, int size); |
6bfc2683 | 366 | |
de6d9b64 | 367 | /*************************************************/ |
916c80e9 FB |
368 | /* fractional numbers for exact pts handling */ |
369 | ||
671adb17 | 370 | /** |
4f57fa8c DB |
371 | * The exact value of the fractional number is: 'val + num / den'. |
372 | * num is assumed to be 0 <= num < den. | |
4c08b2bd | 373 | */ |
916c80e9 | 374 | typedef struct AVFrac { |
115329f1 | 375 | int64_t val, num, den; |
52e57500 | 376 | } AVFrac; |
916c80e9 | 377 | |
916c80e9 | 378 | /*************************************************/ |
b9a281db | 379 | /* input/output formats */ |
de6d9b64 | 380 | |
7caf0cc6 MN |
381 | struct AVCodecTag; |
382 | ||
76c56376 MN |
383 | /** |
384 | * This structure contains the data a format has to probe a file. | |
385 | */ | |
b9a281db | 386 | typedef struct AVProbeData { |
5c91a675 | 387 | const char *filename; |
e5f58f81 | 388 | unsigned char *buf; /**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. */ |
389 | int buf_size; /**< Size of buf except extra allocated bytes */ | |
b9a281db FB |
390 | } AVProbeData; |
391 | ||
e0f8be64 DB |
392 | #define AVPROBE_SCORE_EXTENSION 50 ///< score for file extension |
393 | #define AVPROBE_SCORE_MAX 100 ///< maximum score | |
394 | ||
87e87886 | 395 | #define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer |
de6d9b64 | 396 | |
c68fafe0 | 397 | /// Demuxer will use avio_open, no opened file should be provided by the caller. |
40d9c544 | 398 | #define AVFMT_NOFILE 0x0001 |
4f57fa8c DB |
399 | #define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */ |
400 | #define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */ | |
401 | #define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for | |
402 | raw picture data. */ | |
403 | #define AVFMT_GLOBALHEADER 0x0040 /**< Format wants global header. */ | |
404 | #define AVFMT_NOTIMESTAMPS 0x0080 /**< Format does not need / have any timestamps. */ | |
405 | #define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */ | |
58ec7e00 | 406 | #define AVFMT_TS_DISCONT 0x0200 /**< Format allows timestamp discontinuities. Note, muxers always require valid (monotone) timestamps */ |
25918212 | 407 | #define AVFMT_VARIABLE_FPS 0x0400 /**< Format allows variable fps. */ |
ab5a0175 | 408 | #define AVFMT_NODIMENSIONS 0x0800 /**< Format does not need width/height */ |
bb62d5c1 | 409 | #define AVFMT_NOSTREAMS 0x1000 /**< Format does not require any streams */ |
a5f88736 DB |
410 | #define AVFMT_NOBINSEARCH 0x2000 /**< Format does not allow to fall back on binary search via read_timestamp */ |
411 | #define AVFMT_NOGENSEARCH 0x4000 /**< Format does not allow to fall back on generic search */ | |
b631fba9 | 412 | #define AVFMT_NO_BYTE_SEEK 0x8000 /**< Format does not allow seeking by bytes */ |
f1caf01d | 413 | #define AVFMT_ALLOW_FLUSH 0x10000 /**< Format allows flushing. If not set, the muxer will not receive a NULL packet in the write_packet function. */ |
e9cef897 JZ |
414 | #define AVFMT_TS_NONSTRICT 0x20000 /**< Format does not require strictly |
415 | increasing timestamps, but they must | |
416 | still be monotonic */ | |
c2cb01d4 LB |
417 | #define AVFMT_TS_NEGATIVE 0x40000 /**< Format allows muxing negative |
418 | timestamps. If not set the timestamp | |
419 | will be shifted in av_write_frame and | |
420 | av_interleaved_write_frame so they | |
421 | start from 0. */ | |
b9a281db | 422 | |
489a7b07 AK |
423 | /** |
424 | * @addtogroup lavf_encoding | |
425 | * @{ | |
426 | */ | |
b9a281db | 427 | typedef struct AVOutputFormat { |
de6d9b64 | 428 | const char *name; |
bde15e74 SS |
429 | /** |
430 | * Descriptive name for the format, meant to be more human-readable | |
819174fa | 431 | * than name. You should use the NULL_IF_CONFIG_SMALL() macro |
bde15e74 SS |
432 | * to define it. |
433 | */ | |
de6d9b64 FB |
434 | const char *long_name; |
435 | const char *mime_type; | |
4f57fa8c | 436 | const char *extensions; /**< comma-separated filename extensions */ |
183eaa9a | 437 | /* output support */ |
36ef5369 AK |
438 | enum AVCodecID audio_codec; /**< default audio codec */ |
439 | enum AVCodecID video_codec; /**< default video codec */ | |
440 | enum AVCodecID subtitle_codec; /**< default subtitle codec */ | |
183eaa9a AK |
441 | /** |
442 | * can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_RAWPICTURE, | |
443 | * AVFMT_GLOBALHEADER, AVFMT_NOTIMESTAMPS, AVFMT_VARIABLE_FPS, | |
e9cef897 JZ |
444 | * AVFMT_NODIMENSIONS, AVFMT_NOSTREAMS, AVFMT_ALLOW_FLUSH, |
445 | * AVFMT_TS_NONSTRICT | |
183eaa9a AK |
446 | */ |
447 | int flags; | |
448 | ||
449 | /** | |
450 | * List of supported codec_id-codec_tag pairs, ordered by "better | |
36ef5369 | 451 | * choice first". The arrays are all terminated by AV_CODEC_ID_NONE. |
183eaa9a AK |
452 | */ |
453 | const struct AVCodecTag * const *codec_tag; | |
454 | ||
455 | ||
456 | const AVClass *priv_class; ///< AVClass for the private context | |
457 | ||
458 | /***************************************************************** | |
459 | * No fields below this line are part of the public API. They | |
460 | * may not be used outside of libavformat and can be changed and | |
461 | * removed at will. | |
462 | * New public fields should be added right above. | |
463 | ***************************************************************** | |
464 | */ | |
465 | struct AVOutputFormat *next; | |
76c56376 MN |
466 | /** |
467 | * size of private data so that it can be allocated in the wrapper | |
468 | */ | |
b9a281db | 469 | int priv_data_size; |
183eaa9a | 470 | |
de6d9b64 | 471 | int (*write_header)(struct AVFormatContext *); |
f1caf01d MS |
472 | /** |
473 | * Write a packet. If AVFMT_ALLOW_FLUSH is set in flags, | |
474 | * pkt can be NULL in order to flush data buffered in the muxer. | |
475 | * When flushing, return 0 if there still is more data to flush, | |
476 | * or 1 if everything was flushed and there is no more buffered | |
477 | * data. | |
478 | */ | |
e928649b | 479 | int (*write_packet)(struct AVFormatContext *, AVPacket *pkt); |
de6d9b64 | 480 | int (*write_trailer)(struct AVFormatContext *); |
76c56376 | 481 | /** |
76c56376 MN |
482 | * Currently only used to set pixel format if not YUV420P. |
483 | */ | |
78cb7273 DB |
484 | int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, |
485 | AVPacket *in, int flush); | |
48f9e457 AK |
486 | /** |
487 | * Test if the given codec can be stored in this container. | |
488 | * | |
489 | * @return 1 if the codec is supported, 0 if it is not. | |
490 | * A negative number if unknown. | |
491 | */ | |
36ef5369 | 492 | int (*query_codec)(enum AVCodecID id, int std_compliance); |
b9a281db | 493 | } AVOutputFormat; |
489a7b07 AK |
494 | /** |
495 | * @} | |
496 | */ | |
de6d9b64 | 497 | |
370f27de AK |
498 | /** |
499 | * @addtogroup lavf_decoding | |
500 | * @{ | |
501 | */ | |
b9a281db | 502 | typedef struct AVInputFormat { |
76c56376 MN |
503 | /** |
504 | * A comma separated list of short names for the format. New names | |
ac3ccbc0 AC |
505 | * may be appended with a minor bump. |
506 | */ | |
b9a281db | 507 | const char *name; |
76c56376 | 508 | |
bde15e74 SS |
509 | /** |
510 | * Descriptive name for the format, meant to be more human-readable | |
819174fa | 511 | * than name. You should use the NULL_IF_CONFIG_SMALL() macro |
bde15e74 SS |
512 | * to define it. |
513 | */ | |
b9a281db | 514 | const char *long_name; |
76c56376 MN |
515 | |
516 | /** | |
183eaa9a AK |
517 | * Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_SHOW_IDS, |
518 | * AVFMT_GENERIC_INDEX, AVFMT_TS_DISCONT, AVFMT_NOBINSEARCH, | |
519 | * AVFMT_NOGENSEARCH, AVFMT_NO_BYTE_SEEK. | |
520 | */ | |
521 | int flags; | |
522 | ||
523 | /** | |
524 | * If extensions are defined, then no probe is done. You should | |
525 | * usually not use extension format guessing because it is not | |
526 | * reliable enough | |
527 | */ | |
528 | const char *extensions; | |
529 | ||
530 | const struct AVCodecTag * const *codec_tag; | |
531 | ||
532 | const AVClass *priv_class; ///< AVClass for the private context | |
533 | ||
534 | /***************************************************************** | |
535 | * No fields below this line are part of the public API. They | |
536 | * may not be used outside of libavformat and can be changed and | |
537 | * removed at will. | |
538 | * New public fields should be added right above. | |
539 | ***************************************************************** | |
540 | */ | |
541 | struct AVInputFormat *next; | |
542 | ||
543 | /** | |
f7fe41a0 | 544 | * Raw demuxers store their codec ID here. |
183eaa9a | 545 | */ |
f7fe41a0 | 546 | int raw_codec_id; |
183eaa9a AK |
547 | |
548 | /** | |
76c56376 MN |
549 | * Size of private data so that it can be allocated in the wrapper. |
550 | */ | |
b9a281db | 551 | int priv_data_size; |
76c56376 | 552 | |
65d7d68b | 553 | /** |
22e77e44 | 554 | * Tell if a given file has a chance of being parsed as this format. |
5d81d641 DB |
555 | * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes |
556 | * big so you do not have to check for that unless you need more. | |
65d7d68b | 557 | */ |
b9a281db | 558 | int (*read_probe)(AVProbeData *); |
76c56376 MN |
559 | |
560 | /** | |
561 | * Read the format header and initialize the AVFormatContext | |
6b8b0fe2 LB |
562 | * structure. Return 0 if OK. Only used in raw format right |
563 | * now. 'avformat_new_stream' should be called to create new streams. | |
76c56376 | 564 | */ |
6e9651d1 | 565 | int (*read_header)(struct AVFormatContext *); |
76c56376 MN |
566 | |
567 | /** | |
568 | * Read one packet and put it in 'pkt'. pts and flags are also | |
6b8b0fe2 | 569 | * set. 'avformat_new_stream' can be called only if the flag |
2899a28c AJ |
570 | * AVFMTCTX_NOHEADER is used and only in the calling thread (not in a |
571 | * background thread). | |
76c56376 MN |
572 | * @return 0 on success, < 0 on error. |
573 | * When returning an error, pkt must not have been allocated | |
574 | * or must be freed before returning | |
575 | */ | |
de6d9b64 | 576 | int (*read_packet)(struct AVFormatContext *, AVPacket *pkt); |
76c56376 MN |
577 | |
578 | /** | |
579 | * Close the stream. The AVFormatContext and AVStreams are not | |
580 | * freed by this function | |
581 | */ | |
de6d9b64 | 582 | int (*read_close)(struct AVFormatContext *); |
1de2db8f | 583 | |
115329f1 | 584 | /** |
4f57fa8c DB |
585 | * Seek to a given timestamp relative to the frames in |
586 | * stream component stream_index. | |
22e77e44 DB |
587 | * @param stream_index Must not be -1. |
588 | * @param flags Selects which direction should be preferred if no exact | |
589 | * match is available. | |
05ce0f11 | 590 | * @return >= 0 on success (but not necessarily the new offset) |
3ba1438d | 591 | */ |
e5c70815 AK |
592 | int (*read_seek)(struct AVFormatContext *, |
593 | int stream_index, int64_t timestamp, int flags); | |
594 | ||
8d14a25c | 595 | /** |
58c42af7 | 596 | * Get the next timestamp in stream[stream_index].time_base units. |
d9526386 | 597 | * @return the timestamp or AV_NOPTS_VALUE if an error occurred |
8d14a25c MN |
598 | */ |
599 | int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index, | |
600 | int64_t *pos, int64_t pos_limit); | |
76c56376 MN |
601 | |
602 | /** | |
76c56376 MN |
603 | * Start/resume playing - only meaningful if using a network-based format |
604 | * (RTSP). | |
605 | */ | |
fb2758c8 FB |
606 | int (*read_play)(struct AVFormatContext *); |
607 | ||
76c56376 MN |
608 | /** |
609 | * Pause playing - only meaningful if using a network-based format | |
610 | * (RTSP). | |
611 | */ | |
fb2758c8 FB |
612 | int (*read_pause)(struct AVFormatContext *); |
613 | ||
1de2db8f | 614 | /** |
49bd8e4b | 615 | * Seek to timestamp ts. |
1de2db8f MN |
616 | * Seeking will be done so that the point from which all active streams |
617 | * can be presented successfully will be closest to ts and within min/max_ts. | |
618 | * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. | |
619 | */ | |
882fb0a3 | 620 | int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags); |
b9a281db | 621 | } AVInputFormat; |
370f27de AK |
622 | /** |
623 | * @} | |
624 | */ | |
de6d9b64 | 625 | |
57004ff1 AJ |
626 | enum AVStreamParseType { |
627 | AVSTREAM_PARSE_NONE, | |
628 | AVSTREAM_PARSE_FULL, /**< full parsing and repack */ | |
4f57fa8c | 629 | AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */ |
78cb7273 | 630 | AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */ |
74a6df59 | 631 | AVSTREAM_PARSE_FULL_ONCE, /**< full parsing and repack of the first frame only, only implemented for H.264 currently */ |
57004ff1 AJ |
632 | }; |
633 | ||
fb2758c8 FB |
634 | typedef struct AVIndexEntry { |
635 | int64_t pos; | |
636 | int64_t timestamp; | |
637 | #define AVINDEX_KEYFRAME 0x0001 | |
30a43f2d | 638 | int flags:2; |
4f57fa8c DB |
639 | 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). |
640 | int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */ | |
fb2758c8 FB |
641 | } AVIndexEntry; |
642 | ||
90c2295b ES |
643 | #define AV_DISPOSITION_DEFAULT 0x0001 |
644 | #define AV_DISPOSITION_DUB 0x0002 | |
645 | #define AV_DISPOSITION_ORIGINAL 0x0004 | |
646 | #define AV_DISPOSITION_COMMENT 0x0008 | |
647 | #define AV_DISPOSITION_LYRICS 0x0010 | |
648 | #define AV_DISPOSITION_KARAOKE 0x0020 | |
76c56376 MN |
649 | |
650 | /** | |
651 | * Track should be used during playback by default. | |
652 | * Useful for subtitle track that should be displayed | |
653 | * even when user did not explicitly ask for subtitles. | |
654 | */ | |
7a617a86 | 655 | #define AV_DISPOSITION_FORCED 0x0040 |
12c14cd4 PR |
656 | #define AV_DISPOSITION_HEARING_IMPAIRED 0x0080 /**< stream for hearing impaired audiences */ |
657 | #define AV_DISPOSITION_VISUAL_IMPAIRED 0x0100 /**< stream for visual impaired audiences */ | |
24a83bd1 | 658 | #define AV_DISPOSITION_CLEAN_EFFECTS 0x0200 /**< stream without voice */ |
dd2a4bcf AK |
659 | /** |
660 | * The stream is stored in the file as an attached picture/"cover art" (e.g. | |
661 | * APIC frame in ID3v2). The single packet associated with it will be returned | |
662 | * among the first few packets read from the file unless seeking takes place. | |
663 | * It can also be accessed at any time in AVStream.attached_pic. | |
664 | */ | |
665 | #define AV_DISPOSITION_ATTACHED_PIC 0x0400 | |
90c2295b | 666 | |
ba66ae94 MN |
667 | /** |
668 | * Stream structure. | |
669 | * New fields can be added to the end with minor version bumps. | |
8bfb108b | 670 | * Removal, reordering and changes to existing fields require a major |
ba66ae94 | 671 | * version bump. |
8bfb108b | 672 | * sizeof(AVStream) must not be used outside libav*. |
ba66ae94 | 673 | */ |
de6d9b64 | 674 | typedef struct AVStream { |
43d414ba | 675 | int index; /**< stream index in AVFormatContext */ |
e20ad71e MS |
676 | /** |
677 | * Format-specific stream ID. | |
678 | * decoding: set by libavformat | |
3b4296f4 | 679 | * encoding: set by the user, replaced by libavformat if left unset |
e20ad71e MS |
680 | */ |
681 | int id; | |
967923ab AK |
682 | /** |
683 | * Codec context associated with this stream. Allocated and freed by | |
684 | * libavformat. | |
685 | * | |
686 | * - decoding: The demuxer exports codec information stored in the headers | |
687 | * here. | |
688 | * - encoding: The user sets codec information, the muxer writes it to the | |
689 | * output. Mandatory fields as specified in AVCodecContext | |
690 | * documentation must be set even if this AVCodecContext is | |
691 | * not actually used for encoding. | |
692 | */ | |
693 | AVCodecContext *codec; | |
de6d9b64 | 694 | void *priv_data; |
82583548 | 695 | |
76c56376 MN |
696 | /** |
697 | * encoding: pts generation when outputting stream | |
698 | */ | |
a9fd2b19 | 699 | struct AVFrac pts; |
5b28c8c3 MN |
700 | |
701 | /** | |
8bfb108b | 702 | * This is the fundamental unit of time (in seconds) in terms |
e44ada12 AK |
703 | * of which frame timestamps are represented. |
704 | * | |
5d820db2 | 705 | * decoding: set by libavformat |
0af1fe84 | 706 | * encoding: set by libavformat in avformat_write_header. The muxer may use the |
e44ada12 AK |
707 | * user-provided value of @ref AVCodecContext.time_base "codec->time_base" |
708 | * as a hint. | |
5b28c8c3 | 709 | */ |
9ee91c2f | 710 | AVRational time_base; |
76c56376 | 711 | |
6d96a9b9 | 712 | /** |
8bfb108b DB |
713 | * Decoding: pts of the first frame of the stream, in stream time base. |
714 | * Only set this if you are absolutely 100% sure that the value you set | |
715 | * it to really is the pts of the first frame. | |
4854c253 | 716 | * This may be undefined (AV_NOPTS_VALUE). |
6d96a9b9 | 717 | */ |
115329f1 | 718 | int64_t start_time; |
76c56376 | 719 | |
e26381b6 | 720 | /** |
8bfb108b | 721 | * Decoding: duration of the stream, in stream time base. |
e26381b6 | 722 | * If a source file does not specify a duration, but does specify |
4f57fa8c | 723 | * a bitrate, this value will be estimated from bitrate and file size. |
e26381b6 | 724 | */ |
ee404803 | 725 | int64_t duration; |
fb2758c8 | 726 | |
b4b87d48 | 727 | int64_t nb_frames; ///< number of frames in this stream if known or 0 |
504ee036 | 728 | |
4f57fa8c | 729 | int disposition; /**< AV_DISPOSITION_* bit field */ |
0bef08e5 | 730 | |
ee42df8a LB |
731 | enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed. |
732 | ||
c30a4489 AJ |
733 | /** |
734 | * sample aspect ratio (0 if unknown) | |
735 | * - encoding: Set by user. | |
736 | * - decoding: Set by libavformat. | |
737 | */ | |
738 | AVRational sample_aspect_ratio; | |
f526adaf | 739 | |
d2d67e42 | 740 | AVDictionary *metadata; |
3a41c2f7 | 741 | |
02b398ef MN |
742 | /** |
743 | * Average framerate | |
744 | */ | |
745 | AVRational avg_frame_rate; | |
6c6e6ef5 | 746 | |
dd2a4bcf AK |
747 | /** |
748 | * For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet | |
749 | * will contain the attached picture. | |
750 | * | |
751 | * decoding: set by libavformat, must not be modified by the caller. | |
752 | * encoding: unused | |
753 | */ | |
754 | AVPacket attached_pic; | |
755 | ||
9a174562 AK |
756 | /***************************************************************** |
757 | * All fields below this line are not part of the public API. They | |
758 | * may not be used outside of libavformat and can be changed and | |
759 | * removed at will. | |
760 | * New public fields should be added right above. | |
761 | ***************************************************************** | |
762 | */ | |
763 | ||
6c6e6ef5 | 764 | /** |
da9cea77 | 765 | * Stream information used internally by av_find_stream_info() |
fd0368e7 AJ |
766 | */ |
767 | #define MAX_STD_TIMEBASES (60*12+5) | |
768 | struct { | |
38a4be3f | 769 | int nb_decoded_frames; |
8c1d6ac6 | 770 | int found_decoder; |
fe1c1198 AK |
771 | |
772 | /** | |
773 | * Those are used for average framerate estimation. | |
774 | */ | |
775 | int64_t fps_first_dts; | |
776 | int fps_first_dts_idx; | |
777 | int64_t fps_last_dts; | |
778 | int fps_last_dts_idx; | |
779 | ||
fd0368e7 | 780 | } *info; |
ee42df8a | 781 | |
ee42df8a | 782 | int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */ |
9a174562 | 783 | |
8b64c2ba AK |
784 | #if FF_API_REFERENCE_DTS |
785 | /* a hack to keep ABI compatibility for avconv, which accesses parser even | |
786 | * though it should not */ | |
787 | int64_t do_not_use; | |
788 | #endif | |
9a174562 | 789 | // Timestamp generation support: |
9a174562 AK |
790 | int64_t first_dts; |
791 | int64_t cur_dts; | |
9a174562 | 792 | int64_t last_IP_pts; |
ee42df8a | 793 | int last_IP_duration; |
9a174562 AK |
794 | |
795 | /** | |
796 | * Number of packets to buffer for codec probing | |
797 | */ | |
798 | #define MAX_PROBE_PACKETS 2500 | |
799 | int probe_packets; | |
800 | ||
801 | /** | |
ee42df8a LB |
802 | * Number of frames that have been demuxed during av_find_stream_info() |
803 | */ | |
804 | int codec_info_nb_frames; | |
805 | ||
806 | /* av_read_frame() support */ | |
807 | enum AVStreamParseType need_parsing; | |
808 | struct AVCodecParserContext *parser; | |
809 | ||
810 | /** | |
9a174562 AK |
811 | * last packet in packet_buffer for this stream when muxing. |
812 | */ | |
813 | struct AVPacketList *last_in_packet_buffer; | |
814 | AVProbeData probe_data; | |
815 | #define MAX_REORDER_DELAY 16 | |
816 | int64_t pts_buffer[MAX_REORDER_DELAY+1]; | |
9a174562 AK |
817 | |
818 | AVIndexEntry *index_entries; /**< Only used if the format does not | |
819 | support seeking natively. */ | |
820 | int nb_index_entries; | |
821 | unsigned int index_entries_allocated_size; | |
de6d9b64 FB |
822 | } AVStream; |
823 | ||
15afa396 NS |
824 | #define AV_PROGRAM_RUNNING 1 |
825 | ||
ba66ae94 | 826 | /** |
ba66ae94 | 827 | * New fields can be added to the end with minor version bumps. |
8bfb108b | 828 | * Removal, reordering and changes to existing fields require a major |
ba66ae94 | 829 | * version bump. |
8bfb108b | 830 | * sizeof(AVProgram) must not be used outside libav*. |
ba66ae94 | 831 | */ |
15afa396 NS |
832 | typedef struct AVProgram { |
833 | int id; | |
15afa396 NS |
834 | int flags; |
835 | enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller | |
526efa10 NS |
836 | unsigned int *stream_index; |
837 | unsigned int nb_stream_indexes; | |
d2d67e42 | 838 | AVDictionary *metadata; |
15afa396 NS |
839 | } AVProgram; |
840 | ||
43d414ba | 841 | #define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present |
da24c5e3 FB |
842 | (streams are added dynamically) */ |
843 | ||
79d7836a | 844 | typedef struct AVChapter { |
4f57fa8c DB |
845 | int id; ///< unique ID to identify the chapter |
846 | AVRational time_base; ///< time base in which the start/end timestamps are specified | |
8931e7b4 | 847 | int64_t start, end; ///< chapter start/end time in time_base units |
d2d67e42 | 848 | AVDictionary *metadata; |
79d7836a AK |
849 | } AVChapter; |
850 | ||
33c859c1 AK |
851 | typedef struct AVFormatInternal AVFormatInternal; |
852 | ||
252f17e2 | 853 | /** |
4f57fa8c | 854 | * Format I/O context. |
252f17e2 | 855 | * New fields can be added to the end with minor version bumps. |
8bfb108b | 856 | * Removal, reordering and changes to existing fields require a major |
252f17e2 | 857 | * version bump. |
83daced0 AK |
858 | * sizeof(AVFormatContext) must not be used outside libav*, use |
859 | * avformat_alloc_context() to create an AVFormatContext. | |
252f17e2 | 860 | */ |
de6d9b64 | 861 | typedef struct AVFormatContext { |
83daced0 | 862 | /** |
18c896be | 863 | * A class for logging and @ref avoptions. Set by avformat_alloc_context(). |
83daced0 AK |
864 | * Exports (de)muxer private options if they exist. |
865 | */ | |
866 | const AVClass *av_class; | |
867 | ||
868 | /** | |
18c896be | 869 | * The input container format. |
83daced0 | 870 | * |
18c896be | 871 | * Demuxing only, set by avformat_open_input(). |
83daced0 | 872 | */ |
b9a281db | 873 | struct AVInputFormat *iformat; |
18c896be AK |
874 | |
875 | /** | |
876 | * The output container format. | |
877 | * | |
878 | * Muxing only, must be set by the caller before avformat_write_header(). | |
879 | */ | |
b9a281db | 880 | struct AVOutputFormat *oformat; |
83daced0 AK |
881 | |
882 | /** | |
883 | * Format private data. This is an AVOptions-enabled struct | |
884 | * if and only if iformat/oformat.priv_class is not NULL. | |
18c896be AK |
885 | * |
886 | * - muxing: set by avformat_write_header() | |
887 | * - demuxing: set by avformat_open_input() | |
83daced0 | 888 | */ |
de6d9b64 | 889 | void *priv_data; |
83daced0 | 890 | |
1432c1c4 | 891 | /** |
83daced0 AK |
892 | * I/O context. |
893 | * | |
18c896be AK |
894 | * - demuxing: either set by the user before avformat_open_input() (then |
895 | * the user must close it manually) or set by avformat_open_input(). | |
896 | * - muxing: set by the user before avformat_write_header(). The caller must | |
897 | * take care of closing / freeing the IO context. | |
83daced0 AK |
898 | * |
899 | * Do NOT set this field if AVFMT_NOFILE flag is set in | |
900 | * iformat/oformat.flags. In such a case, the (de)muxer will handle | |
901 | * I/O in some other way and this field will be NULL. | |
902 | */ | |
ae628ec1 | 903 | AVIOContext *pb; |
83daced0 | 904 | |
ee42df8a LB |
905 | /* stream info */ |
906 | int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */ | |
907 | ||
83daced0 | 908 | /** |
18c896be AK |
909 | * Number of elements in AVFormatContext.streams. |
910 | * | |
911 | * Set by avformat_new_stream(), must not be modified by any other code. | |
912 | */ | |
913 | unsigned int nb_streams; | |
914 | /** | |
83daced0 AK |
915 | * A list of all streams in the file. New streams are created with |
916 | * avformat_new_stream(). | |
917 | * | |
18c896be AK |
918 | * - demuxing: streams are created by libavformat in avformat_open_input(). |
919 | * If AVFMTCTX_NOHEADER is set in ctx_flags, then new streams may also | |
920 | * appear in av_read_frame(). | |
921 | * - muxing: streams are created by the user before avformat_write_header(). | |
922 | * | |
923 | * Freed by libavformat in avformat_free_context(). | |
83daced0 | 924 | */ |
38aab35f | 925 | AVStream **streams; |
83daced0 | 926 | |
18c896be AK |
927 | /** |
928 | * input or output filename | |
929 | * | |
930 | * - demuxing: set by avformat_open_input() | |
931 | * - muxing: may be set by the caller before avformat_write_header() | |
932 | */ | |
933 | char filename[1024]; | |
ee404803 | 934 | |
76c56376 | 935 | /** |
18c896be | 936 | * Position of the first frame of the component, in |
76c56376 MN |
937 | * AV_TIME_BASE fractional seconds. NEVER set this value directly: |
938 | * It is deduced from the AVStream values. | |
18c896be AK |
939 | * |
940 | * Demuxing only, set by libavformat. | |
76c56376 | 941 | */ |
115329f1 | 942 | int64_t start_time; |
76c56376 MN |
943 | |
944 | /** | |
18c896be | 945 | * Duration of the stream, in AV_TIME_BASE fractional |
76c56376 | 946 | * seconds. Only set this value if you know none of the individual stream |
da9cea77 | 947 | * durations and also do not set any of them. This is deduced from the |
76c56376 | 948 | * AVStream values if not set. |
18c896be AK |
949 | * |
950 | * Demuxing only, set by libavformat. | |
76c56376 | 951 | */ |
ee404803 | 952 | int64_t duration; |
76c56376 | 953 | |
76c56376 | 954 | /** |
18c896be | 955 | * Total stream bitrate in bit/s, 0 if not |
76c56376 | 956 | * available. Never set it directly if the file_size and the |
6001dad6 | 957 | * duration are known as Libav can compute it automatically. |
76c56376 | 958 | */ |
ee404803 | 959 | int bit_rate; |
fb2758c8 | 960 | |
92400be2 | 961 | unsigned int packet_size; |
17c88cb0 | 962 | int max_delay; |
8108551a | 963 | |
30bc6613 | 964 | int flags; |
22e77e44 | 965 | #define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames. |
4f57fa8c DB |
966 | #define AVFMT_FLAG_IGNIDX 0x0002 ///< Ignore index. |
967 | #define AVFMT_FLAG_NONBLOCK 0x0004 ///< Do not block when reading packets from input. | |
c55806e3 | 968 | #define AVFMT_FLAG_IGNDTS 0x0008 ///< Ignore DTS on frames that contain both DTS & PTS |
fe8344a2 MN |
969 | #define AVFMT_FLAG_NOFILLIN 0x0010 ///< Do not infer any values from other values, just return what is stored in the container |
970 | #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 | |
681ed000 | 971 | #define AVFMT_FLAG_NOBUFFER 0x0040 ///< Do not buffer frames when possible |
05e84c95 | 972 | #define AVFMT_FLAG_CUSTOM_IO 0x0080 ///< The caller has supplied a custom AVIOContext, don't avio_close() it. |
73e8e8db | 973 | #define AVFMT_FLAG_DISCARD_CORRUPT 0x0100 ///< Discard frames marked corrupted |
596e5d47 | 974 | #define AVFMT_FLAG_FLUSH_PACKETS 0x0200 ///< Flush the AVIOContext every packet. |
5894e1bb | 975 | |
76c56376 | 976 | /** |
18c896be AK |
977 | * Maximum size of the data read from input for determining |
978 | * the input container format. | |
979 | * Demuxing only, set by the caller before avformat_open_input(). | |
76c56376 | 980 | */ |
9e6c9470 | 981 | unsigned int probesize; |
a44b3c4d MN |
982 | |
983 | /** | |
18c896be AK |
984 | * Maximum duration (in AV_TIME_BASE units) of the data read |
985 | * from input in avformat_find_stream_info(). | |
986 | * Demuxing only, set by the caller before avformat_find_stream_info(). | |
a44b3c4d MN |
987 | */ |
988 | int max_analyze_duration; | |
c964c2c7 RD |
989 | |
990 | const uint8_t *key; | |
991 | int keylen; | |
15afa396 NS |
992 | |
993 | unsigned int nb_programs; | |
994 | AVProgram **programs; | |
62600469 MN |
995 | |
996 | /** | |
997 | * Forced video codec_id. | |
4f57fa8c | 998 | * Demuxing: Set by user. |
62600469 | 999 | */ |
36ef5369 | 1000 | enum AVCodecID video_codec_id; |
76c56376 | 1001 | |
62600469 MN |
1002 | /** |
1003 | * Forced audio codec_id. | |
4f57fa8c | 1004 | * Demuxing: Set by user. |
62600469 | 1005 | */ |
36ef5369 | 1006 | enum AVCodecID audio_codec_id; |
76c56376 | 1007 | |
62600469 MN |
1008 | /** |
1009 | * Forced subtitle codec_id. | |
4f57fa8c | 1010 | * Demuxing: Set by user. |
62600469 | 1011 | */ |
36ef5369 | 1012 | enum AVCodecID subtitle_codec_id; |
3dea63bd PK |
1013 | |
1014 | /** | |
22e77e44 DB |
1015 | * Maximum amount of memory in bytes to use for the index of each stream. |
1016 | * If the index exceeds this size, entries will be discarded as | |
3dea63bd PK |
1017 | * needed to maintain a smaller size. This can lead to slower or less |
1018 | * accurate seeking (depends on demuxer). | |
4f57fa8c | 1019 | * Demuxers for which a full in-memory index is mandatory will ignore |
3dea63bd | 1020 | * this. |
18c896be AK |
1021 | * - muxing: unused |
1022 | * - demuxing: set by user | |
3dea63bd PK |
1023 | */ |
1024 | unsigned int max_index_size; | |
ab8ab30c RP |
1025 | |
1026 | /** | |
ffa71b2b | 1027 | * Maximum amount of memory in bytes to use for buffering frames |
4f57fa8c | 1028 | * obtained from realtime capture devices. |
ab8ab30c RP |
1029 | */ |
1030 | unsigned int max_picture_buffer; | |
79d7836a | 1031 | |
26b241c0 JS |
1032 | /** |
1033 | * Number of chapters in AVChapter array. | |
1034 | * When muxing, chapters are normally written in the file header, | |
1035 | * so nb_chapters should normally be initialized before write_header | |
1036 | * is called. Some muxers (e.g. mov and mkv) can also write chapters | |
1037 | * in the trailer. To write chapters in the trailer, nb_chapters | |
1038 | * must be zero when write_header is called and non-zero when | |
1039 | * write_trailer is called. | |
18c896be AK |
1040 | * - muxing: set by user |
1041 | * - demuxing: set by libavformat | |
26b241c0 | 1042 | */ |
fbabf1e9 | 1043 | unsigned int nb_chapters; |
79d7836a | 1044 | AVChapter **chapters; |
45b2b05f | 1045 | |
18c896be AK |
1046 | /** |
1047 | * Metadata that applies to the whole file. | |
1048 | * | |
1049 | * - demuxing: set by libavformat in avformat_open_input() | |
1050 | * - muxing: may be set by the caller before avformat_write_header() | |
1051 | * | |
1052 | * Freed by libavformat in avformat_free_context(). | |
1053 | */ | |
d2d67e42 | 1054 | AVDictionary *metadata; |
af122d6a | 1055 | |
b8819c85 MS |
1056 | /** |
1057 | * Start time of the stream in real world time, in microseconds | |
18c896be AK |
1058 | * since the Unix epoch (00:00 1st January 1970). That is, pts=0 in the |
1059 | * stream was captured at this real world time. | |
1060 | * Muxing only, set by the caller before avformat_write_header(). | |
b8819c85 MS |
1061 | */ |
1062 | int64_t start_time_realtime; | |
30315a8d AC |
1063 | |
1064 | /** | |
18c896be AK |
1065 | * The number of frames used for determining the framerate in |
1066 | * avformat_find_stream_info(). | |
1067 | * Demuxing only, set by the caller before avformat_find_stream_info(). | |
30315a8d AC |
1068 | */ |
1069 | int fps_probe_size; | |
2f63440c DB |
1070 | |
1071 | /** | |
1072 | * Error recognition; higher values will detect more errors but may | |
1073 | * misdetect some more or less valid parts as errors. | |
18c896be | 1074 | * Demuxing only, set by the caller before avformat_open_input(). |
2f63440c DB |
1075 | */ |
1076 | int error_recognition; | |
df968050 | 1077 | |
6aa0b98f MS |
1078 | /** |
1079 | * Custom interrupt callbacks for the I/O layer. | |
1080 | * | |
18c896be AK |
1081 | * demuxing: set by the user before avformat_open_input(). |
1082 | * muxing: set by the user before avformat_write_header() | |
6aa0b98f MS |
1083 | * (mainly useful for AVFMT_NOFILE formats). The callback |
1084 | * should also be passed to avio_open2() if it's used to | |
1085 | * open the file. | |
1086 | */ | |
1087 | AVIOInterruptCB interrupt_callback; | |
1088 | ||
ee42df8a LB |
1089 | /** |
1090 | * Flags to enable debugging. | |
1091 | */ | |
1092 | int debug; | |
1093 | #define FF_FDEBUG_TS 0x0001 | |
d9ae1031 LB |
1094 | |
1095 | /** | |
1096 | * Maximum buffering duration for interleaving. | |
1097 | * | |
1098 | * To ensure all the streams are interleaved correctly, | |
1099 | * av_interleaved_write_frame() will wait until it has at least one packet | |
1100 | * for each stream before actually writing any packets to the output file. | |
1101 | * When some streams are "sparse" (i.e. there are large gaps between | |
1102 | * successive packets), this can result in excessive buffering. | |
1103 | * | |
1104 | * This field specifies the maximum difference between the timestamps of the | |
1105 | * first and the last packet in the muxing queue, above which libavformat | |
1106 | * will output a packet regardless of whether it has queued a packet for all | |
1107 | * the streams. | |
1108 | * | |
1109 | * Muxing only, set by the caller before avformat_write_header(). | |
1110 | */ | |
1111 | int64_t max_interleave_delta; | |
1112 | ||
df968050 AK |
1113 | /***************************************************************** |
1114 | * All fields below this line are not part of the public API. They | |
1115 | * may not be used outside of libavformat and can be changed and | |
1116 | * removed at will. | |
1117 | * New public fields should be added right above. | |
1118 | ***************************************************************** | |
1119 | */ | |
df968050 AK |
1120 | |
1121 | /** | |
1122 | * This buffer is only needed when packets were already buffered but | |
1123 | * not decoded, for example to get the codec parameters in MPEG | |
1124 | * streams. | |
1125 | */ | |
1126 | struct AVPacketList *packet_buffer; | |
1127 | struct AVPacketList *packet_buffer_end; | |
1128 | ||
df968050 AK |
1129 | /* av_seek_frame() support */ |
1130 | int64_t data_offset; /**< offset of the first packet */ | |
ee42df8a LB |
1131 | |
1132 | /** | |
1133 | * Raw packets from the demuxer, prior to parsing and decoding. | |
1134 | * This buffer is used for buffering packets until the codec can | |
1135 | * be identified, as parsing cannot be done without knowing the | |
1136 | * codec. | |
1137 | */ | |
1138 | struct AVPacketList *raw_packet_buffer; | |
1139 | struct AVPacketList *raw_packet_buffer_end; | |
1140 | /** | |
27c7ca9c AK |
1141 | * Packets split by the parser get queued here. |
1142 | */ | |
1143 | struct AVPacketList *parse_queue; | |
1144 | struct AVPacketList *parse_queue_end; | |
1145 | /** | |
ee42df8a LB |
1146 | * Remaining size available for raw_packet_buffer, in bytes. |
1147 | */ | |
1148 | #define RAW_PACKET_BUFFER_SIZE 2500000 | |
1149 | int raw_packet_buffer_remaining_size; | |
c2cb01d4 LB |
1150 | |
1151 | /** | |
1152 | * Offset to remap timestamps to be non-negative. | |
1153 | * Expressed in timebase units. | |
1154 | */ | |
1155 | int64_t offset; | |
1156 | ||
1157 | /** | |
1158 | * Timebase for the timestamp offset. | |
1159 | */ | |
1160 | AVRational offset_timebase; | |
1161 | ||
33c859c1 AK |
1162 | /** |
1163 | * An opaque field for libavformat internal usage. | |
1164 | * Must not be accessed in any way by callers. | |
1165 | */ | |
1166 | AVFormatInternal *internal; | |
de6d9b64 FB |
1167 | } AVFormatContext; |
1168 | ||
1169 | typedef struct AVPacketList { | |
1170 | AVPacket pkt; | |
1171 | struct AVPacketList *next; | |
1172 | } AVPacketList; | |
1173 | ||
469c62d0 AK |
1174 | |
1175 | /** | |
1176 | * @defgroup lavf_core Core functions | |
1177 | * @ingroup libavf | |
1178 | * | |
1179 | * Functions for querying libavformat capabilities, allocating core structures, | |
1180 | * etc. | |
1181 | * @{ | |
1182 | */ | |
1183 | ||
1184 | /** | |
1185 | * Return the LIBAVFORMAT_VERSION_INT constant. | |
1186 | */ | |
1187 | unsigned avformat_version(void); | |
1188 | ||
1189 | /** | |
1190 | * Return the libavformat build-time configuration. | |
1191 | */ | |
1192 | const char *avformat_configuration(void); | |
1193 | ||
1194 | /** | |
1195 | * Return the libavformat license. | |
1196 | */ | |
1197 | const char *avformat_license(void); | |
1198 | ||
1199 | /** | |
1200 | * Initialize libavformat and register all the muxers, demuxers and | |
1201 | * protocols. If you do not call this function, then you can select | |
1202 | * exactly which formats you want to support. | |
1203 | * | |
1204 | * @see av_register_input_format() | |
1205 | * @see av_register_output_format() | |
1206 | * @see av_register_protocol() | |
1207 | */ | |
1208 | void av_register_all(void); | |
1209 | ||
1210 | void av_register_input_format(AVInputFormat *format); | |
1211 | void av_register_output_format(AVOutputFormat *format); | |
1212 | ||
1213 | /** | |
1214 | * Do global initialization of network components. This is optional, | |
1215 | * but recommended, since it avoids the overhead of implicitly | |
1216 | * doing the setup for each session. | |
1217 | * | |
1218 | * Calling this function will become mandatory if using network | |
1219 | * protocols at some major version bump. | |
1220 | */ | |
1221 | int avformat_network_init(void); | |
1222 | ||
1223 | /** | |
1224 | * Undo the initialization done by avformat_network_init. | |
1225 | */ | |
1226 | int avformat_network_deinit(void); | |
1227 | ||
aeedac95 SS |
1228 | /** |
1229 | * If f is NULL, returns the first registered input format, | |
22e77e44 | 1230 | * if f is non-NULL, returns the next registered input format after f |
aeedac95 SS |
1231 | * or NULL if f is the last one. |
1232 | */ | |
84be6e72 | 1233 | AVInputFormat *av_iformat_next(AVInputFormat *f); |
aeedac95 SS |
1234 | |
1235 | /** | |
1236 | * If f is NULL, returns the first registered output format, | |
22e77e44 | 1237 | * if f is non-NULL, returns the next registered output format after f |
aeedac95 SS |
1238 | * or NULL if f is the last one. |
1239 | */ | |
84be6e72 | 1240 | AVOutputFormat *av_oformat_next(AVOutputFormat *f); |
de6d9b64 | 1241 | |
469c62d0 AK |
1242 | /** |
1243 | * Allocate an AVFormatContext. | |
1244 | * avformat_free_context() can be used to free the context and everything | |
1245 | * allocated by the framework within it. | |
1246 | */ | |
1247 | AVFormatContext *avformat_alloc_context(void); | |
1248 | ||
1249 | /** | |
1250 | * Free an AVFormatContext and all its streams. | |
1251 | * @param s context to free | |
1252 | */ | |
1253 | void avformat_free_context(AVFormatContext *s); | |
1254 | ||
1255 | /** | |
1256 | * Get the AVClass for AVFormatContext. It can be used in combination with | |
1257 | * AV_OPT_SEARCH_FAKE_OBJ for examining options. | |
1258 | * | |
1259 | * @see av_opt_find(). | |
1260 | */ | |
1261 | const AVClass *avformat_get_class(void); | |
1262 | ||
1263 | /** | |
1264 | * Add a new stream to a media file. | |
1265 | * | |
1266 | * When demuxing, it is called by the demuxer in read_header(). If the | |
1267 | * flag AVFMTCTX_NOHEADER is set in s.ctx_flags, then it may also | |
1268 | * be called in read_packet(). | |
1269 | * | |
1270 | * When muxing, should be called by the user before avformat_write_header(). | |
1271 | * | |
1272 | * @param c If non-NULL, the AVCodecContext corresponding to the new stream | |
1273 | * will be initialized to use this codec. This is needed for e.g. codec-specific | |
1274 | * defaults to be set, so codec should be provided if it is known. | |
1275 | * | |
1276 | * @return newly created stream or NULL on error. | |
1277 | */ | |
1278 | AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c); | |
1279 | ||
1280 | AVProgram *av_new_program(AVFormatContext *s, int id); | |
1281 | ||
1282 | /** | |
1283 | * @} | |
1284 | */ | |
1285 | ||
1286 | ||
370f27de | 1287 | /** |
370f27de AK |
1288 | * @addtogroup lavf_decoding |
1289 | * @{ | |
1290 | */ | |
3217cb42 PI |
1291 | |
1292 | /** | |
49bd8e4b | 1293 | * Find AVInputFormat based on the short name of the input format. |
3217cb42 | 1294 | */ |
b9a281db | 1295 | AVInputFormat *av_find_input_format(const char *short_name); |
3217cb42 PI |
1296 | |
1297 | /** | |
49bd8e4b | 1298 | * Guess the file format. |
3217cb42 | 1299 | * |
4f57fa8c DB |
1300 | * @param is_opened Whether the file is already opened; determines whether |
1301 | * demuxers with or without AVFMT_NOFILE are probed. | |
3217cb42 | 1302 | */ |
94988531 | 1303 | AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened); |
3217cb42 PI |
1304 | |
1305 | /** | |
49bd8e4b | 1306 | * Guess the file format. |
8e2ee182 RD |
1307 | * |
1308 | * @param is_opened Whether the file is already opened; determines whether | |
1309 | * demuxers with or without AVFMT_NOFILE are probed. | |
c99d506b RD |
1310 | * @param score_max A probe score larger that this is required to accept a |
1311 | * detection, the variable is set to the actual detection | |
1312 | * score afterwards. | |
1313 | * If the score is <= AVPROBE_SCORE_MAX / 4 it is recommended | |
8e2ee182 RD |
1314 | * to retry with a larger probe buffer. |
1315 | */ | |
1316 | AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max); | |
1317 | ||
1318 | /** | |
3940caad AH |
1319 | * Probe a bytestream to determine the input format. Each time a probe returns |
1320 | * with a score that is too low, the probe buffer size is increased and another | |
1321 | * attempt is made. When the maximum probe size is reached, the input format | |
1322 | * with the highest score is returned. | |
1323 | * | |
1324 | * @param pb the bytestream to probe | |
1325 | * @param fmt the input format is put here | |
1326 | * @param filename the filename of the stream | |
1327 | * @param logctx the log context | |
1328 | * @param offset the offset within the bytestream to probe from | |
1329 | * @param max_probe_size the maximum probe buffer size (zero for default) | |
1330 | * @return 0 in case of success, a negative value corresponding to an | |
1331 | * AVERROR code otherwise | |
1332 | */ | |
ae628ec1 | 1333 | int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, |
3940caad AH |
1334 | const char *filename, void *logctx, |
1335 | unsigned int offset, unsigned int max_probe_size); | |
1336 | ||
88808c60 | 1337 | /** |
05e84c95 | 1338 | * Open an input stream and read the header. The codecs are not opened. |
64af59bc | 1339 | * The stream must be closed with avformat_close_input(). |
05e84c95 AK |
1340 | * |
1341 | * @param ps Pointer to user-supplied AVFormatContext (allocated by avformat_alloc_context). | |
1342 | * May be a pointer to NULL, in which case an AVFormatContext is allocated by this | |
1343 | * function and written into ps. | |
1344 | * Note that a user-supplied AVFormatContext will be freed on failure. | |
1345 | * @param filename Name of the stream to open. | |
1346 | * @param fmt If non-NULL, this parameter forces a specific input format. | |
1347 | * Otherwise the format is autodetected. | |
1348 | * @param options A dictionary filled with AVFormatContext and demuxer-private options. | |
1349 | * On return this parameter will be destroyed and replaced with a dict containing | |
1350 | * options that were not found. May be NULL. | |
1351 | * | |
1352 | * @return 0 on success, a negative AVERROR on failure. | |
1353 | * | |
1354 | * @note If you want to use custom IO, preallocate the format context and set its pb field. | |
1355 | */ | |
1356 | int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options); | |
1357 | ||
a67c061e AK |
1358 | /** |
1359 | * Read packets of a media file to get stream information. This | |
1360 | * is useful for file formats with no headers such as MPEG. This | |
1361 | * function also computes the real framerate in case of MPEG-2 repeat | |
1362 | * frame mode. | |
1363 | * The logical file position is not changed by this function; | |
1364 | * examined packets may be buffered for later processing. | |
1365 | * | |
1366 | * @param ic media file handle | |
1367 | * @param options If non-NULL, an ic.nb_streams long array of pointers to | |
1368 | * dictionaries, where i-th member contains options for | |
1369 | * codec corresponding to i-th stream. | |
1370 | * On return each dictionary will be filled with options that were not found. | |
1371 | * @return >=0 if OK, AVERROR_xxx on error | |
1372 | * | |
1373 | * @note this function isn't guaranteed to open all the codecs, so | |
1374 | * options being non-empty at return is a perfectly normal behavior. | |
1375 | * | |
1376 | * @todo Let the user decide somehow what information is needed so that | |
1377 | * we do not waste time getting stuff the user does not need. | |
1378 | */ | |
1379 | int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options); | |
3217cb42 PI |
1380 | |
1381 | /** | |
9128ae08 NG |
1382 | * Find the "best" stream in the file. |
1383 | * The best stream is determined according to various heuristics as the most | |
1384 | * likely to be what the user expects. | |
1385 | * If the decoder parameter is non-NULL, av_find_best_stream will find the | |
1386 | * default decoder for the stream's codec; streams for which no decoder can | |
1387 | * be found are ignored. | |
1388 | * | |
1389 | * @param ic media file handle | |
1390 | * @param type stream type: video, audio, subtitles, etc. | |
1391 | * @param wanted_stream_nb user-requested stream number, | |
1392 | * or -1 for automatic selection | |
1393 | * @param related_stream try to find a stream related (eg. in the same | |
1394 | * program) to this one, or -1 if none | |
1395 | * @param decoder_ret if non-NULL, returns the decoder for the | |
1396 | * selected stream | |
1397 | * @param flags flags; none are currently defined | |
1398 | * @return the non-negative stream number in case of success, | |
1399 | * AVERROR_STREAM_NOT_FOUND if no stream with the requested type | |
1400 | * could be found, | |
1401 | * AVERROR_DECODER_NOT_FOUND if streams were found but no decoder | |
1402 | * @note If av_find_best_stream returns successfully and decoder_ret is not | |
1403 | * NULL, then *decoder_ret is guaranteed to be set to a valid AVCodec. | |
1404 | */ | |
1405 | int av_find_best_stream(AVFormatContext *ic, | |
1406 | enum AVMediaType type, | |
1407 | int wanted_stream_nb, | |
1408 | int related_stream, | |
1409 | AVCodec **decoder_ret, | |
1410 | int flags); | |
1411 | ||
3217cb42 | 1412 | /** |
49bd8e4b | 1413 | * Return the next frame of a stream. |
4faf628f MN |
1414 | * This function returns what is stored in the file, and does not validate |
1415 | * that what is there are valid frames for the decoder. It will split what is | |
1416 | * stored in the file into frames and return one for each call. It will not | |
1417 | * omit invalid data between valid frames so as to give the decoder the maximum | |
1418 | * information possible for decoding. | |
3217cb42 | 1419 | * |
1afddbe5 | 1420 | * If pkt->buf is NULL, then the packet is valid until the next |
64af59bc DB |
1421 | * av_read_frame() or until avformat_close_input(). Otherwise the packet |
1422 | * is valid indefinitely. In both cases the packet must be freed with | |
717a4509 AK |
1423 | * av_free_packet when it is no longer needed. For video, the packet contains |
1424 | * exactly one frame. For audio, it contains an integer number of frames if each | |
1425 | * frame has a known fixed size (e.g. PCM or ADPCM data). If the audio frames | |
1426 | * have a variable size (e.g. MPEG audio), then it contains one frame. | |
3217cb42 PI |
1427 | * |
1428 | * pkt->pts, pkt->dts and pkt->duration are always set to correct | |
22e77e44 | 1429 | * values in AVStream.time_base units (and guessed if the format cannot |
4f57fa8c DB |
1430 | * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format |
1431 | * has B-frames, so it is better to rely on pkt->dts if you do not | |
3217cb42 PI |
1432 | * decompress the payload. |
1433 | * | |
4f57fa8c | 1434 | * @return 0 if OK, < 0 on error or end of file |
3217cb42 | 1435 | */ |
fb2758c8 | 1436 | int av_read_frame(AVFormatContext *s, AVPacket *pkt); |
3217cb42 PI |
1437 | |
1438 | /** | |
49bd8e4b | 1439 | * Seek to the keyframe at timestamp. |
3217cb42 PI |
1440 | * 'timestamp' in 'stream_index'. |
1441 | * @param stream_index If stream_index is (-1), a default | |
1442 | * stream is selected, and timestamp is automatically converted | |
1443 | * from AV_TIME_BASE units to the stream specific time_base. | |
4f57fa8c DB |
1444 | * @param timestamp Timestamp in AVStream.time_base units |
1445 | * or, if no stream is specified, in AV_TIME_BASE units. | |
3217cb42 PI |
1446 | * @param flags flags which select direction and seeking mode |
1447 | * @return >= 0 on success | |
1448 | */ | |
78cb7273 DB |
1449 | int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, |
1450 | int flags); | |
3217cb42 PI |
1451 | |
1452 | /** | |
49bd8e4b | 1453 | * Seek to timestamp ts. |
d04768fa MN |
1454 | * Seeking will be done so that the point from which all active streams |
1455 | * can be presented successfully will be closest to ts and within min/max_ts. | |
1456 | * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. | |
1457 | * | |
22e77e44 | 1458 | * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and |
d04768fa | 1459 | * are the file position (this may not be supported by all demuxers). |
22e77e44 | 1460 | * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames |
d04768fa | 1461 | * in the stream with stream_index (this may not be supported by all demuxers). |
22e77e44 DB |
1462 | * Otherwise all timestamps are in units of the stream selected by stream_index |
1463 | * or if stream_index is -1, in AV_TIME_BASE units. | |
1464 | * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as | |
d04768fa MN |
1465 | * keyframes (this may not be supported by all demuxers). |
1466 | * | |
22e77e44 | 1467 | * @param stream_index index of the stream which is used as time base reference |
d04768fa MN |
1468 | * @param min_ts smallest acceptable timestamp |
1469 | * @param ts target timestamp | |
1470 | * @param max_ts largest acceptable timestamp | |
1471 | * @param flags flags | |
32e543f8 | 1472 | * @return >=0 on success, error code otherwise |
998b6f7c | 1473 | * |
8a4d7a30 | 1474 | * @note This is part of the new seek API which is still under construction. |
22e77e44 DB |
1475 | * Thus do not use this yet. It may change at any time, do not expect |
1476 | * ABI compatibility yet! | |
d04768fa MN |
1477 | */ |
1478 | int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags); | |
1479 | ||
1480 | /** | |
49bd8e4b | 1481 | * Start playing a network-based stream (e.g. RTSP stream) at the |
4f57fa8c | 1482 | * current position. |
3217cb42 | 1483 | */ |
fb2758c8 | 1484 | int av_read_play(AVFormatContext *s); |
3217cb42 PI |
1485 | |
1486 | /** | |
49bd8e4b | 1487 | * Pause a network-based stream (e.g. RTSP stream). |
3217cb42 PI |
1488 | * |
1489 | * Use av_read_play() to resume it. | |
1490 | */ | |
fb2758c8 | 1491 | int av_read_pause(AVFormatContext *s); |
3217cb42 | 1492 | |
52660454 AK |
1493 | /** |
1494 | * Close an opened input AVFormatContext. Free it and all its contents | |
1495 | * and set *s to NULL. | |
1496 | */ | |
1497 | void avformat_close_input(AVFormatContext **s); | |
370f27de AK |
1498 | /** |
1499 | * @} | |
1500 | */ | |
3217cb42 | 1501 | |
3ba1438d MN |
1502 | #define AVSEEK_FLAG_BACKWARD 1 ///< seek backward |
1503 | #define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes | |
4f57fa8c | 1504 | #define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non-keyframes |
2bf74f49 | 1505 | #define AVSEEK_FLAG_FRAME 8 ///< seeking based on frame number |
3ba1438d | 1506 | |
3217cb42 | 1507 | /** |
489a7b07 AK |
1508 | * @addtogroup lavf_encoding |
1509 | * @{ | |
1510 | */ | |
f3bfe388 | 1511 | /** |
25de5958 AK |
1512 | * Allocate the stream private data and write the stream header to |
1513 | * an output media file. | |
1514 | * | |
1515 | * @param s Media file handle, must be allocated with avformat_alloc_context(). | |
1516 | * Its oformat field must be set to the desired output format; | |
a5f88736 | 1517 | * Its pb field must be set to an already opened AVIOContext. |
25de5958 AK |
1518 | * @param options An AVDictionary filled with AVFormatContext and muxer-private options. |
1519 | * On return this parameter will be destroyed and replaced with a dict containing | |
1520 | * options that were not found. May be NULL. | |
1521 | * | |
1522 | * @return 0 on success, negative AVERROR on failure. | |
1523 | * | |
1524 | * @see av_opt_find, av_dict_set, avio_open, av_oformat_next. | |
1525 | */ | |
1526 | int avformat_write_header(AVFormatContext *s, AVDictionary **options); | |
1527 | ||
3217cb42 | 1528 | /** |
49bd8e4b | 1529 | * Write a packet to an output media file. |
3217cb42 | 1530 | * |
4c750599 AK |
1531 | * This function passes the packet directly to the muxer, without any buffering |
1532 | * or reordering. The caller is responsible for correctly interleaving the | |
1533 | * packets if the format requires it. Callers that want libavformat to handle | |
1534 | * the interleaving should call av_interleaved_write_frame() instead of this | |
1535 | * function. | |
3217cb42 PI |
1536 | * |
1537 | * @param s media file handle | |
4c750599 AK |
1538 | * @param pkt @parblock |
1539 | * The packet containing the data to be written. Note that unlike | |
1540 | * av_interleaved_write_frame(), this function does not take | |
1541 | * ownership of the packet passed to it (though some muxers may make | |
1542 | * an internal reference to the input packet). | |
1543 | * | |
1544 | * This parameter can be NULL (at any time, not just at the end), in | |
1545 | * order to immediately flush data buffered within the muxer, for | |
1546 | * muxers that buffer up data internally before writing it to the | |
1547 | * output. | |
1548 | * | |
1549 | * Packet's @ref AVPacket.stream_index "stream_index" field must be | |
1550 | * set to the index of the corresponding stream in @ref | |
1551 | * AVFormatContext.streams "s->streams". It is very strongly | |
1552 | * recommended that timing information (@ref AVPacket.pts "pts", @ref | |
1553 | * AVPacket.dts "dts", @ref AVPacket.duration "duration") is set to | |
1554 | * correct values. | |
1555 | * @endparblock | |
f1caf01d | 1556 | * @return < 0 on error, = 0 if OK, 1 if flushed and there is no more data to flush |
4c750599 AK |
1557 | * |
1558 | * @see av_interleaved_write_frame() | |
3217cb42 | 1559 | */ |
e928649b | 1560 | int av_write_frame(AVFormatContext *s, AVPacket *pkt); |
3217cb42 PI |
1561 | |
1562 | /** | |
49bd8e4b | 1563 | * Write a packet to an output media file ensuring correct interleaving. |
3217cb42 | 1564 | * |
ad7f2b69 AK |
1565 | * This function will buffer the packets internally as needed to make sure the |
1566 | * packets in the output file are properly interleaved in the order of | |
1567 | * increasing dts. Callers doing their own interleaving should call | |
1568 | * av_write_frame() instead of this function. | |
3217cb42 PI |
1569 | * |
1570 | * @param s media file handle | |
ad7f2b69 AK |
1571 | * @param pkt @parblock |
1572 | * The packet containing the data to be written. | |
1573 | * | |
1574 | * If the packet is reference-counted, this function will take | |
1575 | * ownership of this reference and unreference it later when it sees | |
1576 | * fit. | |
1577 | * The caller must not access the data through this reference after | |
1578 | * this function returns. If the packet is not reference-counted, | |
1579 | * libavformat will make a copy. | |
1580 | * | |
1581 | * This parameter can be NULL (at any time, not just at the end), to | |
1582 | * flush the interleaving queues. | |
1583 | * | |
1584 | * Packet's @ref AVPacket.stream_index "stream_index" field must be | |
1585 | * set to the index of the corresponding stream in @ref | |
1586 | * AVFormatContext.streams "s->streams". It is very strongly | |
1587 | * recommended that timing information (@ref AVPacket.pts "pts", @ref | |
1588 | * AVPacket.dts "dts", @ref AVPacket.duration "duration") is set to | |
1589 | * correct values. | |
1590 | * @endparblock | |
f97cb451 | 1591 | * |
394fb56c AK |
1592 | * @return 0 on success, a negative AVERROR on error. Libavformat will always |
1593 | * take care of freeing the packet, even if this function fails. | |
ad7f2b69 AK |
1594 | * |
1595 | * @see av_write_frame(), AVFormatContext.max_interleave_delta | |
3217cb42 | 1596 | */ |
3c895fc0 | 1597 | int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt); |
3217cb42 | 1598 | |
3217cb42 | 1599 | /** |
49bd8e4b | 1600 | * Write the stream trailer to an output media file and free the |
2b75bde6 | 1601 | * file private data. |
3217cb42 | 1602 | * |
0af1fe84 | 1603 | * May only be called after a successful call to avformat_write_header. |
dc76fe13 | 1604 | * |
3217cb42 | 1605 | * @param s media file handle |
4f57fa8c | 1606 | * @return 0 if OK, AVERROR_xxx on error |
3217cb42 | 1607 | */ |
b9a281db | 1608 | int av_write_trailer(AVFormatContext *s); |
c8dffc02 AK |
1609 | |
1610 | /** | |
1611 | * Return the output format in the list of registered output formats | |
1612 | * which best matches the provided parameters, or return NULL if | |
1613 | * there is no match. | |
1614 | * | |
1615 | * @param short_name if non-NULL checks if short_name matches with the | |
1616 | * names of the registered formats | |
1617 | * @param filename if non-NULL checks if filename terminates with the | |
1618 | * extensions of the registered formats | |
1619 | * @param mime_type if non-NULL checks if mime_type matches with the | |
1620 | * MIME type of the registered formats | |
1621 | */ | |
1622 | AVOutputFormat *av_guess_format(const char *short_name, | |
1623 | const char *filename, | |
1624 | const char *mime_type); | |
1625 | ||
1626 | /** | |
1627 | * Guess the codec ID based upon muxer and filename. | |
1628 | */ | |
36ef5369 | 1629 | enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, |
c8dffc02 AK |
1630 | const char *filename, const char *mime_type, |
1631 | enum AVMediaType type); | |
1632 | ||
489a7b07 AK |
1633 | /** |
1634 | * @} | |
1635 | */ | |
de6d9b64 | 1636 | |
abf2c2d7 AK |
1637 | |
1638 | /** | |
1639 | * @defgroup lavf_misc Utility functions | |
1640 | * @ingroup libavf | |
1641 | * @{ | |
1642 | * | |
511cf612 | 1643 | * Miscellaneous utility functions related to both muxing and demuxing |
abf2c2d7 AK |
1644 | * (or neither). |
1645 | */ | |
1646 | ||
1647 | /** | |
1648 | * Send a nice hexadecimal dump of a buffer to the specified file stream. | |
1649 | * | |
1650 | * @param f The file stream pointer where the dump should be sent to. | |
1651 | * @param buf buffer | |
1652 | * @param size buffer size | |
1653 | * | |
1654 | * @see av_hex_dump_log, av_pkt_dump2, av_pkt_dump_log2 | |
1655 | */ | |
d3c40a7d | 1656 | void av_hex_dump(FILE *f, const uint8_t *buf, int size); |
abf2c2d7 AK |
1657 | |
1658 | /** | |
1659 | * Send a nice hexadecimal dump of a buffer to the log. | |
1660 | * | |
1661 | * @param avcl A pointer to an arbitrary struct of which the first field is a | |
1662 | * pointer to an AVClass struct. | |
1663 | * @param level The importance level of the message, lower values signifying | |
1664 | * higher importance. | |
1665 | * @param buf buffer | |
1666 | * @param size buffer size | |
1667 | * | |
1668 | * @see av_hex_dump, av_pkt_dump2, av_pkt_dump_log2 | |
1669 | */ | |
d3c40a7d | 1670 | void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size); |
abf2c2d7 AK |
1671 | |
1672 | /** | |
1673 | * Send a nice dump of a packet to the specified file stream. | |
1674 | * | |
1675 | * @param f The file stream pointer where the dump should be sent to. | |
1676 | * @param pkt packet to dump | |
1677 | * @param dump_payload True if the payload must be displayed, too. | |
1678 | * @param st AVStream that the packet belongs to | |
1679 | */ | |
1680 | void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st); | |
1681 | ||
1682 | ||
1683 | /** | |
1684 | * Send a nice dump of a packet to the log. | |
1685 | * | |
1686 | * @param avcl A pointer to an arbitrary struct of which the first field is a | |
1687 | * pointer to an AVClass struct. | |
1688 | * @param level The importance level of the message, lower values signifying | |
1689 | * higher importance. | |
1690 | * @param pkt packet to dump | |
1691 | * @param dump_payload True if the payload must be displayed, too. | |
1692 | * @param st AVStream that the packet belongs to | |
1693 | */ | |
1694 | void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload, | |
1695 | AVStream *st); | |
1696 | ||
1697 | /** | |
36ef5369 AK |
1698 | * Get the AVCodecID for the given codec tag tag. |
1699 | * If no codec id is found returns AV_CODEC_ID_NONE. | |
abf2c2d7 AK |
1700 | * |
1701 | * @param tags list of supported codec_id-codec_tag pairs, as stored | |
1702 | * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag | |
1703 | */ | |
36ef5369 | 1704 | enum AVCodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag); |
abf2c2d7 AK |
1705 | |
1706 | /** | |
1707 | * Get the codec tag for the given codec id id. | |
1708 | * If no codec tag is found returns 0. | |
1709 | * | |
1710 | * @param tags list of supported codec_id-codec_tag pairs, as stored | |
1711 | * in AVInputFormat.codec_tag and AVOutputFormat.codec_tag | |
1712 | */ | |
36ef5369 | 1713 | unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum AVCodecID id); |
abf2c2d7 AK |
1714 | |
1715 | int av_find_default_stream_index(AVFormatContext *s); | |
1716 | ||
1717 | /** | |
1718 | * Get the index for a specific timestamp. | |
1719 | * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond | |
1720 | * to the timestamp which is <= the requested one, if backward | |
1721 | * is 0, then it will be >= | |
1722 | * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise | |
1723 | * @return < 0 if no such timestamp could be found | |
1724 | */ | |
1725 | int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags); | |
1726 | ||
1727 | /** | |
1728 | * Add an index entry into a sorted list. Update the entry if the list | |
1729 | * already contains it. | |
1730 | * | |
1731 | * @param timestamp timestamp in the time base of the given stream | |
1732 | */ | |
1733 | int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, | |
1734 | int size, int distance, int flags); | |
1735 | ||
1736 | ||
1737 | /** | |
1738 | * Split a URL string into components. | |
1739 | * | |
1740 | * The pointers to buffers for storing individual components may be null, | |
1741 | * in order to ignore that component. Buffers for components not found are | |
1742 | * set to empty strings. If the port is not found, it is set to a negative | |
1743 | * value. | |
1744 | * | |
1745 | * @param proto the buffer for the protocol | |
1746 | * @param proto_size the size of the proto buffer | |
1747 | * @param authorization the buffer for the authorization | |
1748 | * @param authorization_size the size of the authorization buffer | |
1749 | * @param hostname the buffer for the host name | |
1750 | * @param hostname_size the size of the hostname buffer | |
1751 | * @param port_ptr a pointer to store the port number in | |
1752 | * @param path the buffer for the path | |
1753 | * @param path_size the size of the path buffer | |
1754 | * @param url the URL to split | |
1755 | */ | |
1756 | void av_url_split(char *proto, int proto_size, | |
1757 | char *authorization, int authorization_size, | |
1758 | char *hostname, int hostname_size, | |
1759 | int *port_ptr, | |
1760 | char *path, int path_size, | |
1761 | const char *url); | |
1762 | ||
610219a5 AK |
1763 | |
1764 | void av_dump_format(AVFormatContext *ic, | |
1765 | int index, | |
1766 | const char *url, | |
1767 | int is_output); | |
3217cb42 | 1768 | |
3217cb42 | 1769 | /** |
49bd8e4b | 1770 | * Return in 'buf' the path with '%d' replaced by a number. |
4f57fa8c | 1771 | * |
3217cb42 PI |
1772 | * Also handles the '%0nd' format where 'n' is the total number |
1773 | * of digits and '%%'. | |
1774 | * | |
1775 | * @param buf destination buffer | |
1776 | * @param buf_size destination buffer size | |
1777 | * @param path numbered sequence string | |
8ea0e802 | 1778 | * @param number frame number |
4f57fa8c | 1779 | * @return 0 if OK, -1 on format error |
3217cb42 | 1780 | */ |
5c07cf53 MB |
1781 | int av_get_frame_filename(char *buf, int buf_size, |
1782 | const char *path, int number); | |
3217cb42 PI |
1783 | |
1784 | /** | |
49bd8e4b | 1785 | * Check whether filename actually is a numbered sequence generator. |
3217cb42 PI |
1786 | * |
1787 | * @param filename possible numbered sequence string | |
4f57fa8c | 1788 | * @return 1 if a valid numbered sequence string, 0 otherwise |
3217cb42 | 1789 | */ |
5c07cf53 | 1790 | int av_filename_number_test(const char *filename); |
96baaa6a | 1791 | |
c5388c07 | 1792 | /** |
49bd8e4b | 1793 | * Generate an SDP for an RTP session. |
c5388c07 | 1794 | * |
8034130e LB |
1795 | * Note, this overwrites the id values of AVStreams in the muxer contexts |
1796 | * for getting unique dynamic payload types. | |
1797 | * | |
c5388c07 LA |
1798 | * @param ac array of AVFormatContexts describing the RTP streams. If the |
1799 | * array is composed by only one context, such context can contain | |
1800 | * multiple AVStreams (one AVStream per RTP stream). Otherwise, | |
1801 | * all the contexts in the array (an AVCodecContext per RTP stream) | |
4f57fa8c | 1802 | * must contain only one AVStream. |
8767b80f | 1803 | * @param n_files number of AVCodecContexts contained in ac |
c234d40b AK |
1804 | * @param buf buffer where the SDP will be stored (must be allocated by |
1805 | * the caller) | |
8767b80f | 1806 | * @param size the size of the buffer |
4f57fa8c | 1807 | * @return 0 if OK, AVERROR_xxx on error |
c5388c07 | 1808 | */ |
c234d40b | 1809 | int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size); |
c3675dfe | 1810 | |
1a70d127 | 1811 | /** |
49bd8e4b | 1812 | * Return a positive value if the given filename has one of the given |
1a70d127 SS |
1813 | * extensions, 0 otherwise. |
1814 | * | |
1815 | * @param extensions a comma-separated list of filename extensions | |
1816 | */ | |
1817 | int av_match_ext(const char *filename, const char *extensions); | |
1818 | ||
48f9e457 AK |
1819 | /** |
1820 | * Test if the given container can store a codec. | |
1821 | * | |
1822 | * @param std_compliance standards compliance level, one of FF_COMPLIANCE_* | |
1823 | * | |
1824 | * @return 1 if codec with ID codec_id can be stored in ofmt, 0 if it cannot. | |
1825 | * A negative number if this information is not available. | |
1826 | */ | |
36ef5369 | 1827 | int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance); |
48f9e457 | 1828 | |
abf2c2d7 | 1829 | /** |
dd6d3b0e AK |
1830 | * @defgroup riff_fourcc RIFF FourCCs |
1831 | * @{ | |
36ef5369 | 1832 | * Get the tables mapping RIFF FourCCs to libavcodec AVCodecIDs. The tables are |
dd6d3b0e AK |
1833 | * meant to be passed to av_codec_get_id()/av_codec_get_tag() as in the |
1834 | * following code: | |
1835 | * @code | |
1836 | * uint32_t tag = MKTAG('H', '2', '6', '4'); | |
1837 | * const struct AVCodecTag *table[] = { avformat_get_riff_video_tags(), 0 }; | |
36ef5369 | 1838 | * enum AVCodecID id = av_codec_get_id(table, tag); |
dd6d3b0e AK |
1839 | * @endcode |
1840 | */ | |
1841 | /** | |
36ef5369 | 1842 | * @return the table mapping RIFF FourCCs for video to libavcodec AVCodecID. |
dd6d3b0e AK |
1843 | */ |
1844 | const struct AVCodecTag *avformat_get_riff_video_tags(void); | |
1845 | /** | |
36ef5369 | 1846 | * @return the table mapping RIFF FourCCs for audio to AVCodecID. |
dd6d3b0e AK |
1847 | */ |
1848 | const struct AVCodecTag *avformat_get_riff_audio_tags(void); | |
1849 | /** | |
1850 | * @} | |
1851 | */ | |
1852 | ||
1853 | /** | |
abf2c2d7 AK |
1854 | * @} |
1855 | */ | |
1856 | ||
98790382 | 1857 | #endif /* AVFORMAT_AVFORMAT_H */ |