The AltiVec optimizations of libswscale are no longer under GPL.
[libav.git] / libavformat / avformat.h
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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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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 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
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21#ifndef AVFORMAT_AVFORMAT_H
22#define AVFORMAT_AVFORMAT_H
de6d9b64 23
800c289a 24#define LIBAVFORMAT_VERSION_MAJOR 52
86cb7e33 25#define LIBAVFORMAT_VERSION_MINOR 34
92400be2 26#define LIBAVFORMAT_VERSION_MICRO 1
e97ac1e6 27
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28#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
29 LIBAVFORMAT_VERSION_MINOR, \
30 LIBAVFORMAT_VERSION_MICRO)
31#define LIBAVFORMAT_VERSION AV_VERSION(LIBAVFORMAT_VERSION_MAJOR, \
32 LIBAVFORMAT_VERSION_MINOR, \
33 LIBAVFORMAT_VERSION_MICRO)
5aa083ee 34#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT
8026c3b5 35
5aa083ee 36#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
4b1f4f23 37
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38/**
39 * Returns the LIBAVFORMAT_VERSION_INT constant.
40 */
41unsigned avformat_version(void);
42
f71869a4 43#include <time.h>
67070e4f 44#include <stdio.h> /* FILE */
76a448ed 45#include "libavcodec/avcodec.h"
de6d9b64 46
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47#include "avio.h"
48
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49struct AVFormatContext;
50
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51
52/*
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53 * Public Metadata API.
54 * The metadata API allows libavformat to export metadata tags to a client
55 * application using a sequence of key/value pairs.
56 * Important concepts to keep in mind:
57 * 1. Keys are unique; there can never be 2 tags with the same key. This is
58 * also meant semantically, i.e., a demuxer should not knowingly produce
59 * several keys that are literally different but semantically identical.
60 * E.g., key=Author5, key=Author6. In this example, all authors must be
61 * placed in the same tag.
62 * 2. Metadata is flat, not hierarchical; there are no subtags. If you
63 * want to store, e.g., the email address of the child of producer Alice
64 * and actor Bob, that could have key=alice_and_bobs_childs_email_address.
65 * 3. A tag whose value is localized for a particular language is appended
7e030c47 66 * with a dash character ('-') and the ISO 639-2/B 3-letter language code.
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67 * For example: Author-ger=Michael, Author-eng=Mike
68 * The original/default language is in the unqualified "Author" tag.
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69 * A demuxer should set a default if it sets any translated tag.
70 */
71
48a81c0f 72#define AV_METADATA_MATCH_CASE 1
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73#define AV_METADATA_IGNORE_SUFFIX 2
74
75typedef struct {
76 char *key;
77 char *value;
bc1d2afb 78}AVMetadataTag;
a6d18a0e 79
e232c252 80typedef struct AVMetadata AVMetadata;
f610a9f2 81typedef struct AVMetadataConv AVMetadataConv;
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82
83/**
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84 * Gets a metadata element with matching key.
85 * @param prev Set to the previous matching element to find the next.
86 * @param flags Allows case as well as suffix-insensitive comparisons.
87 * @return Found tag or NULL, changing key or value leads to undefined behavior.
a6d18a0e 88 */
bc1d2afb 89AVMetadataTag *
e232c252 90av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
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91
92/**
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93 * Sets the given tag in m, overwriting an existing tag.
94 * @param key tag key to add to m (will be av_strduped)
95 * @param value tag value to add to m (will be av_strduped)
96 * @return >= 0 on success otherwise an error code <0
a6d18a0e 97 */
5ea7ce88 98int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
a6d18a0e 99
094d9df7 100/**
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101 * Convert all the metadata sets from ctx according to the source and
102 * destination conversion tables.
103 * @param d_conv destination tags format conversion table
104 * @param s_conv source tags format conversion table
105 */
106void av_metadata_conv(struct AVFormatContext *ctx,const AVMetadataConv *d_conv,
107 const AVMetadataConv *s_conv);
108
109/**
22e77e44 110 * Frees all the memory allocated for an AVMetadata struct.
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111 */
112void av_metadata_free(AVMetadata **m);
113
a6d18a0e 114
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115/* packet functions */
116
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117
118/**
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119 * Allocate and read the payload of a packet and initialize its fields with
120 * default values.
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121 *
122 * @param pkt packet
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123 * @param size desired payload size
124 * @return >0 (read size) if OK, AVERROR_xxx otherwise
3217cb42 125 */
2692067a 126int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
3217cb42 127
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128
129/*************************************************/
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130/* fractional numbers for exact pts handling */
131
671adb17 132/**
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133 * The exact value of the fractional number is: 'val + num / den'.
134 * num is assumed to be 0 <= num < den.
4c08b2bd 135 */
916c80e9 136typedef struct AVFrac {
115329f1 137 int64_t val, num, den;
52e57500 138} AVFrac;
916c80e9 139
916c80e9 140/*************************************************/
b9a281db 141/* input/output formats */
de6d9b64 142
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143struct AVCodecTag;
144
4f57fa8c 145/** This structure contains the data a format has to probe a file. */
b9a281db 146typedef struct AVProbeData {
5c91a675 147 const char *filename;
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148 unsigned char *buf;
149 int buf_size;
150} AVProbeData;
151
22e77e44 152#define AVPROBE_SCORE_MAX 100 ///< maximum score, half of that is used for file-extension-based detection
87e87886 153#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
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154
155typedef struct AVFormatParameters {
c0df9d75 156 AVRational time_base;
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157 int sample_rate;
158 int channels;
159 int width;
160 int height;
4606ac8d 161 enum PixelFormat pix_fmt;
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162 int channel; /**< Used to select DV channel. */
163 const char *standard; /**< TV standard, NTSC, PAL, SECAM */
164 unsigned int mpeg2ts_raw:1; /**< Force raw MPEG-2 transport stream output, if possible. */
165 unsigned int mpeg2ts_compute_pcr:1; /**< Compute exact PCR for each transport
72e043dd 166 stream packet (only meaningful if
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167 mpeg2ts_raw is TRUE). */
168 unsigned int initial_pause:1; /**< Do not begin to play the stream
169 immediately (RTSP only). */
72e043dd 170 unsigned int prealloced_context:1;
71957315 171#if LIBAVFORMAT_VERSION_INT < (53<<16)
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172 enum CodecID video_codec_id;
173 enum CodecID audio_codec_id;
71957315 174#endif
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175} AVFormatParameters;
176
4f57fa8c 177//! Demuxer will use url_fopen, no opened file should be provided by the caller.
40d9c544 178#define AVFMT_NOFILE 0x0001
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179#define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */
180#define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */
181#define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for
182 raw picture data. */
183#define AVFMT_GLOBALHEADER 0x0040 /**< Format wants global header. */
184#define AVFMT_NOTIMESTAMPS 0x0080 /**< Format does not need / have any timestamps. */
185#define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */
186#define AVFMT_TS_DISCONT 0x0200 /**< Format allows timestamp discontinuities. */
25918212 187#define AVFMT_VARIABLE_FPS 0x0400 /**< Format allows variable fps. */
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188
189typedef struct AVOutputFormat {
de6d9b64 190 const char *name;
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191 /**
192 * Descriptive name for the format, meant to be more human-readable
819174fa 193 * than name. You should use the NULL_IF_CONFIG_SMALL() macro
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194 * to define it.
195 */
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196 const char *long_name;
197 const char *mime_type;
4f57fa8c 198 const char *extensions; /**< comma-separated filename extensions */
22e77e44 199 /** size of private data so that it can be allocated in the wrapper */
b9a281db 200 int priv_data_size;
de6d9b64 201 /* output support */
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202 enum CodecID audio_codec; /**< default audio codec */
203 enum CodecID video_codec; /**< default video codec */
de6d9b64 204 int (*write_header)(struct AVFormatContext *);
e928649b 205 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
de6d9b64 206 int (*write_trailer)(struct AVFormatContext *);
43d414ba 207 /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
b9a281db 208 int flags;
4f57fa8c 209 /** Currently only used to set pixel format if not YUV420P. */
290c5fa6 210 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
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211 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
212 AVPacket *in, int flush);
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213
214 /**
78cb7273 215 * List of supported codec_id-codec_tag pairs, ordered by "better
22e77e44 216 * choice first". The arrays are all terminated by CODEC_ID_NONE.
7caf0cc6 217 */
c1854592 218 const struct AVCodecTag * const *codec_tag;
7caf0cc6 219
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220 enum CodecID subtitle_codec; /**< default subtitle codec */
221
719e721a 222 const AVMetadataConv *metadata_conv;
f610a9f2 223
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224 /* private fields */
225 struct AVOutputFormat *next;
226} AVOutputFormat;
de6d9b64 227
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228typedef struct AVInputFormat {
229 const char *name;
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230 /**
231 * Descriptive name for the format, meant to be more human-readable
819174fa 232 * than name. You should use the NULL_IF_CONFIG_SMALL() macro
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233 * to define it.
234 */
b9a281db 235 const char *long_name;
4f57fa8c 236 /** Size of private data so that it can be allocated in the wrapper. */
b9a281db 237 int priv_data_size;
65d7d68b 238 /**
22e77e44 239 * Tell if a given file has a chance of being parsed as this format.
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240 * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes
241 * big so you do not have to check for that unless you need more.
65d7d68b 242 */
b9a281db 243 int (*read_probe)(AVProbeData *);
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244 /** Read the format header and initialize the AVFormatContext
245 structure. Return 0 if OK. 'ap' if non-NULL contains
246 additional parameters. Only used in raw format right
b9a281db 247 now. 'av_new_stream' should be called to create new streams. */
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248 int (*read_header)(struct AVFormatContext *,
249 AVFormatParameters *ap);
4f57fa8c 250 /** Read one packet and put it in 'pkt'. pts and flags are also
b9a281db 251 set. 'av_new_stream' can be called only if the flag
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252 AVFMTCTX_NOHEADER is used.
253 @return 0 on success, < 0 on error.
254 When returning an error, pkt must not have been allocated
255 or must be freed before returning */
de6d9b64 256 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
4f57fa8c 257 /** Close the stream. The AVFormatContext and AVStreams are not
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258 freed by this function */
259 int (*read_close)(struct AVFormatContext *);
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260
261#if LIBAVFORMAT_VERSION_MAJOR < 53
115329f1 262 /**
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263 * Seek to a given timestamp relative to the frames in
264 * stream component stream_index.
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265 * @param stream_index Must not be -1.
266 * @param flags Selects which direction should be preferred if no exact
267 * match is available.
05ce0f11 268 * @return >= 0 on success (but not necessarily the new offset)
3ba1438d 269 */
115329f1 270 int (*read_seek)(struct AVFormatContext *,
3ba1438d 271 int stream_index, int64_t timestamp, int flags);
1de2db8f 272#endif
8d14a25c 273 /**
4f57fa8c 274 * Gets the next timestamp in stream[stream_index].time_base units.
d9526386 275 * @return the timestamp or AV_NOPTS_VALUE if an error occurred
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276 */
277 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
278 int64_t *pos, int64_t pos_limit);
4f57fa8c 279 /** Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER. */
de6d9b64 280 int flags;
4f57fa8c 281 /** If extensions are defined, then no probe is done. You should
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282 usually not use extension format guessing because it is not
283 reliable enough */
284 const char *extensions;
4f57fa8c 285 /** General purpose read-only value that the format can use. */
b9a281db 286 int value;
fb2758c8 287
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288 /** Start/resume playing - only meaningful if using a network-based format
289 (RTSP). */
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290 int (*read_play)(struct AVFormatContext *);
291
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292 /** Pause playing - only meaningful if using a network-based format
293 (RTSP). */
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294 int (*read_pause)(struct AVFormatContext *);
295
c1854592 296 const struct AVCodecTag * const *codec_tag;
7caf0cc6 297
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298 /**
299 * Seek to timestamp ts.
300 * Seeking will be done so that the point from which all active streams
301 * can be presented successfully will be closest to ts and within min/max_ts.
302 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
303 */
882fb0a3 304 int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
1de2db8f 305
719e721a 306 const AVMetadataConv *metadata_conv;
f610a9f2 307
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308 /* private fields */
309 struct AVInputFormat *next;
310} AVInputFormat;
de6d9b64 311
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312enum AVStreamParseType {
313 AVSTREAM_PARSE_NONE,
314 AVSTREAM_PARSE_FULL, /**< full parsing and repack */
4f57fa8c 315 AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */
78cb7273 316 AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */
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317};
318
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319typedef struct AVIndexEntry {
320 int64_t pos;
321 int64_t timestamp;
322#define AVINDEX_KEYFRAME 0x0001
30a43f2d 323 int flags:2;
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324 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).
325 int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */
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326} AVIndexEntry;
327
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328#define AV_DISPOSITION_DEFAULT 0x0001
329#define AV_DISPOSITION_DUB 0x0002
330#define AV_DISPOSITION_ORIGINAL 0x0004
331#define AV_DISPOSITION_COMMENT 0x0008
332#define AV_DISPOSITION_LYRICS 0x0010
333#define AV_DISPOSITION_KARAOKE 0x0020
334
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335/**
336 * Stream structure.
337 * New fields can be added to the end with minor version bumps.
8bfb108b 338 * Removal, reordering and changes to existing fields require a major
ba66ae94 339 * version bump.
8bfb108b 340 * sizeof(AVStream) must not be used outside libav*.
ba66ae94 341 */
de6d9b64 342typedef struct AVStream {
43d414ba 343 int index; /**< stream index in AVFormatContext */
4f57fa8c 344 int id; /**< format-specific stream ID */
43d414ba 345 AVCodecContext *codec; /**< codec context */
b4b87d48 346 /**
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347 * Real base framerate of the stream.
348 * This is the lowest framerate with which all timestamps can be
864ff8c1 349 * represented accurately (it is the least common multiple of all
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350 * framerates in the stream). Note, this value is just a guess!
351 * For example, if the time base is 1/90000 and all frames have either
4f57fa8c 352 * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
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353 */
354 AVRational r_frame_rate;
de6d9b64 355 void *priv_data;
82583548 356
b9a281db 357 /* internal data used in av_find_stream_info() */
82583548 358 int64_t first_dts;
4f57fa8c 359 /** encoding: pts generation when outputting stream */
a9fd2b19 360 struct AVFrac pts;
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361
362 /**
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363 * This is the fundamental unit of time (in seconds) in terms
364 * of which frame timestamps are represented. For fixed-fps content,
22e77e44 365 * time base should be 1/framerate and timestamp increments should be 1.
5b28c8c3 366 */
9ee91c2f 367 AVRational time_base;
43d414ba 368 int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
a48b7a6b 369 /* ffmpeg.c private use */
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370 int stream_copy; /**< If set, just copy stream. */
371 enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
b4aea108 372 //FIXME move stuff to a flags field?
4f57fa8c 373 /** Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
755bfeab 374 * MN: dunno if that is the right place for it */
115329f1 375 float quality;
6d96a9b9 376 /**
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377 * Decoding: pts of the first frame of the stream, in stream time base.
378 * Only set this if you are absolutely 100% sure that the value you set
379 * it to really is the pts of the first frame.
4854c253 380 * This may be undefined (AV_NOPTS_VALUE).
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381 * @note The ASF header does NOT contain a correct start_time the ASF
382 * demuxer must NOT set this.
6d96a9b9 383 */
115329f1 384 int64_t start_time;
e26381b6 385 /**
8bfb108b 386 * Decoding: duration of the stream, in stream time base.
e26381b6 387 * If a source file does not specify a duration, but does specify
4f57fa8c 388 * a bitrate, this value will be estimated from bitrate and file size.
e26381b6 389 */
ee404803 390 int64_t duration;
fb2758c8 391
827f7e28 392#if LIBAVFORMAT_VERSION_INT < (53<<16)
7e030c47 393 char language[4]; /** ISO 639-2/B 3-letter language code (empty string if undefined) */
827f7e28 394#endif
09730260 395
fb2758c8 396 /* av_read_frame() support */
57004ff1 397 enum AVStreamParseType need_parsing;
fb2758c8 398 struct AVCodecParserContext *parser;
6ec87caa 399
fb2758c8 400 int64_t cur_dts;
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401 int last_IP_duration;
402 int64_t last_IP_pts;
fb2758c8 403 /* av_seek_frame() support */
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404 AVIndexEntry *index_entries; /**< Only used if the format does not
405 support seeking natively. */
fb2758c8 406 int nb_index_entries;
191e8ca7 407 unsigned int index_entries_allocated_size;
115329f1 408
b4b87d48 409 int64_t nb_frames; ///< number of frames in this stream if known or 0
504ee036 410
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411#if LIBAVFORMAT_VERSION_INT < (53<<16)
412 int64_t unused[4+1];
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413
414 char *filename; /**< source filename of the stream */
827f7e28 415#endif
90c2295b 416
4f57fa8c 417 int disposition; /**< AV_DISPOSITION_* bit field */
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418
419 AVProbeData probe_data;
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420#define MAX_REORDER_DELAY 16
421 int64_t pts_buffer[MAX_REORDER_DELAY+1];
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422
423 /**
424 * sample aspect ratio (0 if unknown)
425 * - encoding: Set by user.
426 * - decoding: Set by libavformat.
427 */
428 AVRational sample_aspect_ratio;
f526adaf 429
e232c252 430 AVMetadata *metadata;
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431
432 /* av_read_frame() support */
433 const uint8_t *cur_ptr;
434 int cur_len;
435 AVPacket cur_pkt;
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436
437 // Timestamp generation support:
438 /**
439 * Timestamp corresponding to the last dts sync point.
440 *
441 * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
442 * a DTS is received from the underlying container. Otherwise set to
443 * AV_NOPTS_VALUE by default.
444 */
445 int64_t reference_dts;
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446
447 /**
448 * Number of packets to buffer for codec probing
449 * NOT PART OF PUBLIC API
450 */
451#define MAX_PROBE_PACKETS 100
452 int probe_packets;
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453} AVStream;
454
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455#define AV_PROGRAM_RUNNING 1
456
ba66ae94 457/**
ba66ae94 458 * New fields can be added to the end with minor version bumps.
8bfb108b 459 * Removal, reordering and changes to existing fields require a major
ba66ae94 460 * version bump.
8bfb108b 461 * sizeof(AVProgram) must not be used outside libav*.
ba66ae94 462 */
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463typedef struct AVProgram {
464 int id;
827f7e28 465#if LIBAVFORMAT_VERSION_INT < (53<<16)
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466 char *provider_name; ///< network name for DVB streams
467 char *name; ///< service name for DVB streams
827f7e28 468#endif
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469 int flags;
470 enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller
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471 unsigned int *stream_index;
472 unsigned int nb_stream_indexes;
e232c252 473 AVMetadata *metadata;
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474} AVProgram;
475
43d414ba 476#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
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477 (streams are added dynamically) */
478
79d7836a 479typedef struct AVChapter {
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480 int id; ///< unique ID to identify the chapter
481 AVRational time_base; ///< time base in which the start/end timestamps are specified
8931e7b4 482 int64_t start, end; ///< chapter start/end time in time_base units
827f7e28 483#if LIBAVFORMAT_VERSION_INT < (53<<16)
c2fb6be4 484 char *title; ///< chapter title
827f7e28 485#endif
e232c252 486 AVMetadata *metadata;
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487} AVChapter;
488
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489#define MAX_STREAMS 20
490
252f17e2 491/**
4f57fa8c 492 * Format I/O context.
252f17e2 493 * New fields can be added to the end with minor version bumps.
8bfb108b 494 * Removal, reordering and changes to existing fields require a major
252f17e2 495 * version bump.
8bfb108b 496 * sizeof(AVFormatContext) must not be used outside libav*.
252f17e2 497 */
de6d9b64 498typedef struct AVFormatContext {
1447aac4 499 const AVClass *av_class; /**< Set by avformat_alloc_context. */
4f57fa8c 500 /* Can only be iformat or oformat, not both at the same time. */
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501 struct AVInputFormat *iformat;
502 struct AVOutputFormat *oformat;
de6d9b64 503 void *priv_data;
899681cd 504 ByteIOContext *pb;
db69c2e5 505 unsigned int nb_streams;
de6d9b64 506 AVStream *streams[MAX_STREAMS];
43d414ba 507 char filename[1024]; /**< input or output filename */
de6d9b64 508 /* stream info */
4568325a 509 int64_t timestamp;
827f7e28 510#if LIBAVFORMAT_VERSION_INT < (53<<16)
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511 char title[512];
512 char author[512];
513 char copyright[512];
514 char comment[512];
6a58e151 515 char album[512];
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516 int year; /**< ID3 year, 0 if none */
517 int track; /**< track number, 0 if none */
518 char genre[32]; /**< ID3 genre */
827f7e28 519#endif
6a58e151 520
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521 int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
522 /* private data for pts handling (do not modify directly). */
43d414ba 523 /** This buffer is only needed when packets were already buffered but
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524 not decoded, for example to get the codec parameters in MPEG
525 streams. */
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526 struct AVPacketList *packet_buffer;
527
4f57fa8c 528 /** Decoding: position of the first frame of the component, in
ee404803 529 AV_TIME_BASE fractional seconds. NEVER set this value directly:
4f57fa8c 530 It is deduced from the AVStream values. */
115329f1 531 int64_t start_time;
4f57fa8c 532 /** Decoding: duration of the stream, in AV_TIME_BASE fractional
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533 seconds. NEVER set this value directly: it is deduced from the
534 AVStream values. */
535 int64_t duration;
4f57fa8c 536 /** decoding: total file size, 0 if unknown */
ee404803 537 int64_t file_size;
4f57fa8c 538 /** Decoding: total stream bitrate in bit/s, 0 if not
ee404803 539 available. Never set it directly if the file_size and the
22e77e44 540 duration are known as FFmpeg can compute it automatically. */
ee404803 541 int bit_rate;
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542
543 /* av_read_frame() support */
544 AVStream *cur_st;
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545#if LIBAVFORMAT_VERSION_INT < (53<<16)
546 const uint8_t *cur_ptr_deprecated;
547 int cur_len_deprecated;
548 AVPacket cur_pkt_deprecated;
549#endif
fb2758c8 550
fb2758c8 551 /* av_seek_frame() support */
43d414ba 552 int64_t data_offset; /** offset of the first packet */
fb2758c8 553 int index_built;
115329f1 554
2db3c638 555 int mux_rate;
92400be2 556 unsigned int packet_size;
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557 int preload;
558 int max_delay;
8108551a 559
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560#define AVFMT_NOOUTPUTLOOP -1
561#define AVFMT_INFINITEOUTPUTLOOP 0
43d414ba 562 /** number of times to loop output in formats that support it */
8108551a 563 int loop_output;
115329f1 564
30bc6613 565 int flags;
22e77e44 566#define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames.
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567#define AVFMT_FLAG_IGNIDX 0x0002 ///< Ignore index.
568#define AVFMT_FLAG_NONBLOCK 0x0004 ///< Do not block when reading packets from input.
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569
570 int loop_input;
22e77e44 571 /** decoding: size of data to probe; encoding: unused. */
9e6c9470 572 unsigned int probesize;
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573
574 /**
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575 * Maximum time (in AV_TIME_BASE units) during which the input should
576 * be analyzed in av_find_stream_info().
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577 */
578 int max_analyze_duration;
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579
580 const uint8_t *key;
581 int keylen;
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582
583 unsigned int nb_programs;
584 AVProgram **programs;
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585
586 /**
587 * Forced video codec_id.
4f57fa8c 588 * Demuxing: Set by user.
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589 */
590 enum CodecID video_codec_id;
591 /**
592 * Forced audio codec_id.
4f57fa8c 593 * Demuxing: Set by user.
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594 */
595 enum CodecID audio_codec_id;
596 /**
597 * Forced subtitle codec_id.
4f57fa8c 598 * Demuxing: Set by user.
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599 */
600 enum CodecID subtitle_codec_id;
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601
602 /**
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603 * Maximum amount of memory in bytes to use for the index of each stream.
604 * If the index exceeds this size, entries will be discarded as
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605 * needed to maintain a smaller size. This can lead to slower or less
606 * accurate seeking (depends on demuxer).
4f57fa8c 607 * Demuxers for which a full in-memory index is mandatory will ignore
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608 * this.
609 * muxing : unused
610 * demuxing: set by user
611 */
612 unsigned int max_index_size;
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613
614 /**
ffa71b2b 615 * Maximum amount of memory in bytes to use for buffering frames
4f57fa8c 616 * obtained from realtime capture devices.
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617 */
618 unsigned int max_picture_buffer;
79d7836a 619
fbabf1e9 620 unsigned int nb_chapters;
79d7836a 621 AVChapter **chapters;
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622
623 /**
4f57fa8c 624 * Flags to enable debugging.
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625 */
626 int debug;
627#define FF_FDEBUG_TS 0x0001
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628
629 /**
4f57fa8c 630 * Raw packets from the demuxer, prior to parsing and decoding.
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631 * This buffer is used for buffering packets until the codec can
632 * be identified, as parsing cannot be done without knowing the
633 * codec.
634 */
635 struct AVPacketList *raw_packet_buffer;
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636 struct AVPacketList *raw_packet_buffer_end;
637
638 struct AVPacketList *packet_buffer_end;
47146dfb 639
e232c252 640 AVMetadata *metadata;
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641} AVFormatContext;
642
643typedef struct AVPacketList {
644 AVPacket pkt;
645 struct AVPacketList *next;
646} AVPacketList;
647
84be6e72 648#if LIBAVFORMAT_VERSION_INT < (53<<16)
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649extern AVInputFormat *first_iformat;
650extern AVOutputFormat *first_oformat;
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651#endif
652
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653/**
654 * If f is NULL, returns the first registered input format,
22e77e44 655 * if f is non-NULL, returns the next registered input format after f
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656 * or NULL if f is the last one.
657 */
84be6e72 658AVInputFormat *av_iformat_next(AVInputFormat *f);
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659
660/**
661 * If f is NULL, returns the first registered output format,
22e77e44 662 * if f is non-NULL, returns the next registered output format after f
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663 * or NULL if f is the last one.
664 */
84be6e72 665AVOutputFormat *av_oformat_next(AVOutputFormat *f);
de6d9b64 666
5b6d5596 667enum CodecID av_guess_image2_codec(const char *filename);
290c5fa6 668
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669/* XXX: Use automatic init with either ELF sections or C file parser */
670/* modules. */
de6d9b64 671
b9a281db 672/* utils.c */
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673void av_register_input_format(AVInputFormat *format);
674void av_register_output_format(AVOutputFormat *format);
115329f1 675AVOutputFormat *guess_stream_format(const char *short_name,
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676 const char *filename,
677 const char *mime_type);
115329f1 678AVOutputFormat *guess_format(const char *short_name,
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679 const char *filename,
680 const char *mime_type);
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681
682/**
4f57fa8c 683 * Guesses the codec ID based upon muxer and filename.
3217cb42 684 */
115329f1 685enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
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686 const char *filename, const char *mime_type,
687 enum CodecType type);
de6d9b64 688
3217cb42 689/**
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690 * Send a nice hexadecimal dump of a buffer to the specified file stream.
691 *
692 * @param f The file stream pointer where the dump should be sent to.
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693 * @param buf buffer
694 * @param size buffer size
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695 *
696 * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
3217cb42 697 */
fb2758c8 698void av_hex_dump(FILE *f, uint8_t *buf, int size);
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699
700/**
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701 * Send a nice hexadecimal dump of a buffer to the log.
702 *
703 * @param avcl A pointer to an arbitrary struct of which the first field is a
704 * pointer to an AVClass struct.
705 * @param level The importance level of the message, lower values signifying
706 * higher importance.
707 * @param buf buffer
708 * @param size buffer size
709 *
710 * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
711 */
712void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
713
714/**
715 * Send a nice dump of a packet to the specified file stream.
716 *
717 * @param f The file stream pointer where the dump should be sent to.
3217cb42 718 * @param pkt packet to dump
4f57fa8c 719 * @param dump_payload True if the payload must be displayed, too.
3217cb42 720 */
fb2758c8 721void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 722
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723/**
724 * Send a nice dump of a packet to the log.
725 *
726 * @param avcl A pointer to an arbitrary struct of which the first field is a
727 * pointer to an AVClass struct.
728 * @param level The importance level of the message, lower values signifying
729 * higher importance.
730 * @param pkt packet to dump
4f57fa8c 731 * @param dump_payload True if the payload must be displayed, too.
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732 */
733void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
734
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735/**
736 * Initialize libavformat and register all the muxers, demuxers and
737 * protocols. If you do not call this function, then you can select
738 * exactly which formats you want to support.
739 *
740 * @see av_register_input_format()
741 * @see av_register_output_format()
5d377501 742 * @see av_register_protocol()
4815e246 743 */
94988531 744void av_register_all(void);
de6d9b64 745
43d414ba 746/** codec tag <-> codec id */
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747enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
748unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id);
7caf0cc6 749
b9a281db 750/* media file input */
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751
752/**
4f57fa8c 753 * Finds AVInputFormat based on the short name of the input format.
3217cb42 754 */
b9a281db 755AVInputFormat *av_find_input_format(const char *short_name);
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756
757/**
758 * Guess file format.
759 *
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760 * @param is_opened Whether the file is already opened; determines whether
761 * demuxers with or without AVFMT_NOFILE are probed.
3217cb42 762 */
94988531 763AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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764
765/**
766 * Allocates all the structures needed to read an input stream.
767 * This does not open the needed codecs for decoding the stream[s].
768 */
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769int av_open_input_stream(AVFormatContext **ic_ptr,
770 ByteIOContext *pb, const char *filename,
da24c5e3 771 AVInputFormat *fmt, AVFormatParameters *ap);
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772
773/**
864ff8c1 774 * Open a media file as input. The codecs are not opened. Only the file
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775 * header (if present) is read.
776 *
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777 * @param ic_ptr The opened media file handle is put here.
778 * @param filename filename to open
779 * @param fmt If non-NULL, force the file format to use.
3217cb42 780 * @param buf_size optional buffer size (zero if default is OK)
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781 * @param ap Additional parameters needed when opening the file
782 * (NULL if default).
4f57fa8c 783 * @return 0 if OK, AVERROR_xxx otherwise
3217cb42 784 */
115329f1 785int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
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786 AVInputFormat *fmt,
787 int buf_size,
788 AVFormatParameters *ap);
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SS
789
790#if LIBAVFORMAT_VERSION_MAJOR < 53
791/**
792 * @deprecated Use avformat_alloc_context() instead.
793 */
794attribute_deprecated AVFormatContext *av_alloc_format_context(void);
795#endif
796
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797/**
798 * Allocate an AVFormatContext.
5d81d641 799 * Can be freed with av_free() but do not forget to free everything you
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800 * explicitly allocated as well!
801 */
88a28965 802AVFormatContext *avformat_alloc_context(void);
b9a281db 803
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804/**
805 * Read packets of a media file to get stream information. This
806 * is useful for file formats with no headers such as MPEG. This
22e77e44 807 * function also computes the real framerate in case of MPEG-2 repeat
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808 * frame mode.
809 * The logical file position is not changed by this function;
810 * examined packets may be buffered for later processing.
811 *
812 * @param ic media file handle
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813 * @return >=0 if OK, AVERROR_xxx on error
814 * @todo Let the user decide somehow what information is needed so that
815 * we do not waste time getting stuff the user does not need.
3217cb42 816 */
b9a281db 817int av_find_stream_info(AVFormatContext *ic);
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818
819/**
820 * Read a transport packet from a media file.
821 *
864ff8c1 822 * This function is obsolete and should never be used.
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823 * Use av_read_frame() instead.
824 *
825 * @param s media file handle
826 * @param pkt is filled
4f57fa8c 827 * @return 0 if OK, AVERROR_xxx on error
3217cb42 828 */
de6d9b64 829int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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830
831/**
832 * Return the next frame of a stream.
833 *
834 * The returned packet is valid
835 * until the next av_read_frame() or until av_close_input_file() and
836 * must be freed with av_free_packet. For video, the packet contains
837 * exactly one frame. For audio, it contains an integer number of
838 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
839 * data). If the audio frames have a variable size (e.g. MPEG audio),
840 * then it contains one frame.
841 *
842 * pkt->pts, pkt->dts and pkt->duration are always set to correct
22e77e44 843 * values in AVStream.time_base units (and guessed if the format cannot
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844 * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
845 * has B-frames, so it is better to rely on pkt->dts if you do not
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846 * decompress the payload.
847 *
4f57fa8c 848 * @return 0 if OK, < 0 on error or end of file
3217cb42 849 */
fb2758c8 850int av_read_frame(AVFormatContext *s, AVPacket *pkt);
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851
852/**
22e77e44 853 * Seek to the keyframe at timestamp.
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854 * 'timestamp' in 'stream_index'.
855 * @param stream_index If stream_index is (-1), a default
856 * stream is selected, and timestamp is automatically converted
857 * from AV_TIME_BASE units to the stream specific time_base.
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858 * @param timestamp Timestamp in AVStream.time_base units
859 * or, if no stream is specified, in AV_TIME_BASE units.
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860 * @param flags flags which select direction and seeking mode
861 * @return >= 0 on success
862 */
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863int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
864 int flags);
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865
866/**
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867 * Seek to timestamp ts.
868 * Seeking will be done so that the point from which all active streams
869 * can be presented successfully will be closest to ts and within min/max_ts.
870 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
871 *
22e77e44 872 * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and
d04768fa 873 * are the file position (this may not be supported by all demuxers).
22e77e44 874 * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames
d04768fa 875 * in the stream with stream_index (this may not be supported by all demuxers).
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876 * Otherwise all timestamps are in units of the stream selected by stream_index
877 * or if stream_index is -1, in AV_TIME_BASE units.
878 * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as
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879 * keyframes (this may not be supported by all demuxers).
880 *
22e77e44 881 * @param stream_index index of the stream which is used as time base reference
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882 * @param min_ts smallest acceptable timestamp
883 * @param ts target timestamp
884 * @param max_ts largest acceptable timestamp
885 * @param flags flags
886 * @returns >=0 on success, error code otherwise
998b6f7c 887 *
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888 * @NOTE This is part of the new seek API which is still under construction.
889 * Thus do not use this yet. It may change at any time, do not expect
890 * ABI compatibility yet!
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891 */
892int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
893
894/**
22e77e44 895 * Start playing a network-based stream (e.g. RTSP stream) at the
4f57fa8c 896 * current position.
3217cb42 897 */
fb2758c8 898int av_read_play(AVFormatContext *s);
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899
900/**
22e77e44 901 * Pause a network-based stream (e.g. RTSP stream).
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902 *
903 * Use av_read_play() to resume it.
904 */
fb2758c8 905int av_read_pause(AVFormatContext *s);
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906
907/**
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908 * Free a AVFormatContext allocated by av_open_input_stream.
909 * @param s context to free
910 */
911void av_close_input_stream(AVFormatContext *s);
912
913/**
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914 * Close a media file (but not its codecs).
915 *
916 * @param s media file handle
917 */
de6d9b64 918void av_close_input_file(AVFormatContext *s);
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919
920/**
921 * Add a new stream to a media file.
922 *
923 * Can only be called in the read_header() function. If the flag
924 * AVFMTCTX_NOHEADER is in the format context, then new streams
925 * can be added in read_packet too.
926 *
927 * @param s media file handle
4f57fa8c 928 * @param id file-format-dependent stream ID
3217cb42 929 */
b9a281db 930AVStream *av_new_stream(AVFormatContext *s, int id);
15afa396 931AVProgram *av_new_program(AVFormatContext *s, int id);
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932
933/**
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934 * Add a new chapter.
935 * This function is NOT part of the public API
4f57fa8c 936 * and should ONLY be used by demuxers.
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937 *
938 * @param s media file handle
4f57fa8c 939 * @param id unique ID for this chapter
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940 * @param start chapter start time in time_base units
941 * @param end chapter end time in time_base units
79d7836a 942 * @param title chapter title
5c37f43a 943 *
4f57fa8c 944 * @return AVChapter or NULL on error
79d7836a 945 */
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946AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
947 int64_t start, int64_t end, const char *title);
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948
949/**
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950 * Set the pts for a given stream.
951 *
952 * @param s stream
953 * @param pts_wrap_bits number of bits effectively used by the pts
954 * (used for wrap control, 33 is the value for MPEG)
955 * @param pts_num numerator to convert to seconds (MPEG: 1)
956 * @param pts_den denominator to convert to seconds (MPEG: 90000)
957 */
9ee91c2f 958void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 959 int pts_num, int pts_den);
de6d9b64 960
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961#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
962#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
4f57fa8c 963#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non-keyframes
3ba1438d 964
b754978a 965int av_find_default_stream_index(AVFormatContext *s);
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966
967/**
968 * Gets the index for a specific timestamp.
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969 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
970 * to the timestamp which is <= the requested one, if backward
971 * is 0, then it will be >=
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972 * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
973 * @return < 0 if no such timestamp could be found
974 */
dc56fc38 975int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
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976
977/**
3dea63bd 978 * Ensures the index uses less memory than the maximum specified in
22e77e44 979 * AVFormatContext.max_index_size by discarding entries if it grows
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980 * too large.
981 * This function is not part of the public API and should only be called
982 * by demuxers.
983 */
984void ff_reduce_index(AVFormatContext *s, int stream_index);
985
986/**
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987 * Add an index entry into a sorted list. Update the entry if the list
988 * already contains it.
3217cb42 989 *
4f57fa8c 990 * @param timestamp timestamp in the time base of the given stream
3217cb42 991 */
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992int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
993 int size, int distance, int flags);
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994
995/**
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996 * Does a binary search using av_index_search_timestamp() and
997 * AVCodec.read_timestamp().
998 * This is not supposed to be called directly by a user application,
999 * but by demuxers.
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1000 * @param target_ts target timestamp in the time base of the given stream
1001 * @param stream_index stream number
1002 */
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1003int av_seek_frame_binary(AVFormatContext *s, int stream_index,
1004 int64_t target_ts, int flags);
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1005
1006/**
4f57fa8c 1007 * Updates cur_dts of all streams based on the given timestamp and AVStream.
3217cb42 1008 *
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1009 * Stream ref_st unchanged, others set cur_dts in their native time base.
1010 * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
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1011 * @param timestamp new dts expressed in time_base of param ref_st
1012 * @param ref_st reference stream giving time_base of param timestamp
1013 */
22ffac70 1014void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
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1015
1016/**
1017 * Does a binary search using read_timestamp().
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1018 * This is not supposed to be called directly by a user application,
1019 * but by demuxers.
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1020 * @param target_ts target timestamp in the time base of the given stream
1021 * @param stream_index stream number
1022 */
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1023int64_t av_gen_search(AVFormatContext *s, int stream_index,
1024 int64_t target_ts, int64_t pos_min,
1025 int64_t pos_max, int64_t pos_limit,
1026 int64_t ts_min, int64_t ts_max,
1027 int flags, int64_t *ts_ret,
1028 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
b754978a 1029
43d414ba 1030/** media file output */
290c5fa6 1031int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
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1032
1033/**
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1034 * Allocate the stream private data and write the stream header to an
1035 * output media file.
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1036 *
1037 * @param s media file handle
4f57fa8c 1038 * @return 0 if OK, AVERROR_xxx on error
3217cb42 1039 */
b9a281db 1040int av_write_header(AVFormatContext *s);
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1041
1042/**
1043 * Write a packet to an output media file.
1044 *
1045 * The packet shall contain one audio or video frame.
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1046 * The packet must be correctly interleaved according to the container
1047 * specification, if not then av_interleaved_write_frame must be used.
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1048 *
1049 * @param s media file handle
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1050 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1051 dts/pts, ...
4f57fa8c 1052 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
3217cb42 1053 */
e928649b 1054int av_write_frame(AVFormatContext *s, AVPacket *pkt);
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1055
1056/**
1057 * Writes a packet to an output media file ensuring correct interleaving.
1058 *
1059 * The packet must contain one audio or video frame.
22e77e44 1060 * If the packets are already correctly interleaved, the application should
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DB
1061 * call av_write_frame() instead as it is slightly faster. It is also important
1062 * to keep in mind that completely non-interleaved input will need huge amounts
1063 * of memory to interleave with this, so it is preferable to interleave at the
1064 * demuxer level.
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1065 *
1066 * @param s media file handle
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1067 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1068 dts/pts, ...
4f57fa8c 1069 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
3217cb42 1070 */
3c895fc0 1071int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
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1072
1073/**
4f57fa8c 1074 * Interleave a packet per dts in an output media file.
3217cb42 1075 *
78cb7273 1076 * Packets with pkt->destruct == av_destruct_packet will be freed inside this
22e77e44 1077 * function, so they cannot be used after it. Note that calling av_free_packet()
78cb7273 1078 * on them is still safe.
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1079 *
1080 * @param s media file handle
1081 * @param out the interleaved packet will be output here
1082 * @param in the input packet
1083 * @param flush 1 if no further packets are available as input and all
1084 * remaining packets should be output
1085 * @return 1 if a packet was output, 0 if no packet could be output,
d9526386 1086 * < 0 if an error occurred
3217cb42 1087 */
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1088int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1089 AVPacket *pkt, int flush);
e928649b 1090
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1091/**
1092 * @brief Write the stream trailer to an output media file and
1093 * free the file private data.
1094 *
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1095 * May only be called after a successful call to av_write_header.
1096 *
3217cb42 1097 * @param s media file handle
4f57fa8c 1098 * @return 0 if OK, AVERROR_xxx on error
3217cb42 1099 */
b9a281db 1100int av_write_trailer(AVFormatContext *s);
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1101
1102void dump_format(AVFormatContext *ic,
115329f1 1103 int index,
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1104 const char *url,
1105 int is_output);
3217cb42 1106
1ca9133f 1107#if LIBAVFORMAT_VERSION_MAJOR < 53
3217cb42 1108/**
4f57fa8c 1109 * Parses width and height out of string str.
26ef3220 1110 * @deprecated Use av_parse_video_frame_size instead.
3217cb42 1111 */
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1112attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
1113 const char *str);
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1114
1115/**
22e77e44 1116 * Converts framerate from a string to a fraction.
26ef3220 1117 * @deprecated Use av_parse_video_frame_rate instead.
3217cb42 1118 */
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1119attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
1120 const char *arg);
1ca9133f 1121#endif
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1122
1123/**
819174fa 1124 * Parses datestr and returns a corresponding number of microseconds.
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1125 * @param datestr String representing a date or a duration.
1126 * - If a date the syntax is:
3217cb42 1127 * @code
3217cb42 1128 * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
3217cb42 1129 * @endcode
4f57fa8c 1130 * Time is local time unless Z is appended, in which case it is
f9436161 1131 * interpreted as UTC.
4f57fa8c 1132 * If the year-month-day part is not specified it takes the current
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1133 * year-month-day.
1134 * Returns the number of microseconds since 1st of January, 1970 up to
819174fa 1135 * the time of the parsed date or INT64_MIN if datestr cannot be
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1136 * successfully parsed.
1137 * - If a duration the syntax is:
1138 * @code
1139 * [-]HH[:MM[:SS[.m...]]]
1140 * [-]S+[.m...]
1141 * @endcode
1142 * Returns the number of microseconds contained in a time interval
819174fa 1143 * with the specified duration or INT64_MIN if datestr cannot be
7338d368 1144 * successfully parsed.
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1145 * @param duration Flag which tells how to interpret datestr, if
1146 * not zero datestr is interpreted as a duration, otherwise as a
f9436161 1147 * date.
3217cb42 1148 */
0c1a9eda 1149int64_t parse_date(const char *datestr, int duration);
de6d9b64 1150
fff5e687 1151/** Gets the current time in microseconds. */
0c1a9eda 1152int64_t av_gettime(void);
94988531 1153
4f57fa8c 1154/* ffm-specific for ffserver */
de6d9b64 1155#define FFM_PACKET_SIZE 4096
bc5c918e 1156int64_t ffm_read_write_index(int fd);
6fcce4f9 1157int ffm_write_write_index(int fd, int64_t pos);
bc5c918e 1158void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
de6d9b64 1159
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1160/**
1161 * Attempts to find a specific tag in a URL.
1162 *
1163 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
1164 * Return 1 if found.
1165 */
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1166int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
1167
3217cb42 1168/**
22e77e44 1169 * Returns in 'buf' the path with '%d' replaced by a number.
4f57fa8c 1170 *
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1171 * Also handles the '%0nd' format where 'n' is the total number
1172 * of digits and '%%'.
1173 *
1174 * @param buf destination buffer
1175 * @param buf_size destination buffer size
1176 * @param path numbered sequence string
8ea0e802 1177 * @param number frame number
4f57fa8c 1178 * @return 0 if OK, -1 on format error
3217cb42 1179 */
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1180int av_get_frame_filename(char *buf, int buf_size,
1181 const char *path, int number);
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1182
1183/**
1184 * Check whether filename actually is a numbered sequence generator.
1185 *
1186 * @param filename possible numbered sequence string
4f57fa8c 1187 * @return 1 if a valid numbered sequence string, 0 otherwise
3217cb42 1188 */
5c07cf53 1189int av_filename_number_test(const char *filename);
96baaa6a 1190
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1191/**
1192 * Generate an SDP for an RTP session.
1193 *
1194 * @param ac array of AVFormatContexts describing the RTP streams. If the
1195 * array is composed by only one context, such context can contain
1196 * multiple AVStreams (one AVStream per RTP stream). Otherwise,
1197 * all the contexts in the array (an AVCodecContext per RTP stream)
4f57fa8c 1198 * must contain only one AVStream.
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1199 * @param n_files number of AVCodecContexts contained in ac
1200 * @param buff buffer where the SDP will be stored (must be allocated by
4f57fa8c 1201 * the caller)
8767b80f 1202 * @param size the size of the buffer
4f57fa8c 1203 * @return 0 if OK, AVERROR_xxx on error
c5388c07 1204 */
8767b80f 1205int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
c5388c07 1206
fb025625 1207#ifdef HAVE_AV_CONFIG_H
f71869a4 1208
2db5da97 1209void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
39f472c3 1210
e4e70d2e 1211#ifdef __GNUC__
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1212#define dynarray_add(tab, nb_ptr, elem)\
1213do {\
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1214 __typeof__(tab) _tab = (tab);\
1215 __typeof__(elem) _elem = (elem);\
39f472c3 1216 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
2db5da97 1217 ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
39f472c3 1218} while(0)
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FH
1219#else
1220#define dynarray_add(tab, nb_ptr, elem)\
1221do {\
2db5da97 1222 ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
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FH
1223} while(0)
1224#endif
39f472c3 1225
f71869a4 1226time_t mktimegm(struct tm *tm);
0c9fc6e1 1227struct tm *brktimegm(time_t secs, struct tm *tm);
115329f1 1228const char *small_strptime(const char *p, const char *fmt,
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FB
1229 struct tm *dt);
1230
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1231struct in_addr;
1232int resolve_host(struct in_addr *sin_addr, const char *hostname);
1233
1234void url_split(char *proto, int proto_size,
6ba5cbc6 1235 char *authorization, int authorization_size,
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1236 char *hostname, int hostname_size,
1237 int *port_ptr,
1238 char *path, int path_size,
1239 const char *url);
1240
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SS
1241/**
1242 * Returns a positive value if the given filename has one of the given
1243 * extensions, 0 otherwise.
1244 *
1245 * @param extensions a comma-separated list of filename extensions
1246 */
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1247int match_ext(const char *filename, const char *extensions);
1248
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1249#endif /* HAVE_AV_CONFIG_H */
1250
98790382 1251#endif /* AVFORMAT_AVFORMAT_H */