Display error message when user attempts to resample non-S16 audio formats.
[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 FFMPEG_AVFORMAT_H
22#define FFMPEG_AVFORMAT_H
de6d9b64 23
800c289a 24#define LIBAVFORMAT_VERSION_MAJOR 52
c30a4489 25#define LIBAVFORMAT_VERSION_MINOR 21
800c289a 26#define LIBAVFORMAT_VERSION_MICRO 0
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
49/* packet functions */
50
51typedef struct AVPacket {
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52 /**
53 * Presentation time stamp in time_base units.
54 * This is the time at which the decompressed packet will be presented
55 * to the user.
56 * Can be AV_NOPTS_VALUE if it is not stored in the file.
57 * pts MUST be larger or equal to dts as presentation can not happen before
58 * decompression, unless one wants to view hex dumps. Some formats misuse
59 * the terms dts and pts/cts to mean something different, these timestamps
60 * must be converted to true pts/dts before they are stored in AVPacket.
61 */
62 int64_t pts;
63 /**
64 * Decompression time stamp in time_base units.
65 * This is the time at which the packet is decompressed.
66 * Can be AV_NOPTS_VALUE if it is not stored in the file.
67 */
68 int64_t dts;
0c1a9eda 69 uint8_t *data;
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70 int size;
71 int stream_index;
72 int flags;
2692067a 73 int duration; ///< presentation duration in time_base units (0 if not available)
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74 void (*destruct)(struct AVPacket *);
75 void *priv;
2692067a 76 int64_t pos; ///< byte position in stream, -1 if unknown
115329f1 77} AVPacket;
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78#define PKT_FLAG_KEY 0x0001
79
63dd1377 80void av_destruct_packet_nofree(AVPacket *pkt);
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81
82/**
83 * Default packet destructor.
84 */
90ad92b3 85void av_destruct_packet(AVPacket *pkt);
63dd1377 86
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87/**
88 * Initialize optional fields of a packet to default values.
89 *
90 * @param pkt packet
91 */
659596f0 92void av_init_packet(AVPacket *pkt);
de6d9b64 93
3217cb42 94/**
ac3967c1 95 * Allocate the payload of a packet and initialize its fields to default values.
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96 *
97 * @param pkt packet
98 * @param size wanted payload size
99 * @return 0 if OK. AVERROR_xxx otherwise.
100 */
de6d9b64 101int av_new_packet(AVPacket *pkt, int size);
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102
103/**
ac3967c1 104 * Allocate and read the payload of a packet and initialize its fields to default values.
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105 *
106 * @param pkt packet
107 * @param size wanted payload size
108 * @return >0 (read size) if OK. AVERROR_xxx otherwise.
109 */
2692067a 110int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
3217cb42 111
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112/**
113 * @warning This is a hack - the packet memory allocation stuff is broken. The
114 * packet is allocated if it was not really allocated
115 */
fb2758c8 116int av_dup_packet(AVPacket *pkt);
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117
118/**
119 * Free a packet
120 *
121 * @param pkt packet to free
122 */
123static inline void av_free_packet(AVPacket *pkt)
124{
342474ab 125 if (pkt && pkt->destruct) {
bb270c08 126 pkt->destruct(pkt);
342474ab 127 }
6fa5a56c 128}
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129
130/*************************************************/
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131/* fractional numbers for exact pts handling */
132
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133/**
134 * the exact value of the fractional number is: 'val + num / den'.
135 * num is assumed to be such as 0 <= num < den
136 * @deprecated Use AVRational instead
137*/
916c80e9 138typedef struct AVFrac {
115329f1 139 int64_t val, num, den;
955ab9a4 140} AVFrac attribute_deprecated;
916c80e9 141
916c80e9 142/*************************************************/
b9a281db 143/* input/output formats */
de6d9b64 144
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145struct AVCodecTag;
146
de6d9b64 147struct AVFormatContext;
b9a281db 148
43d414ba 149/** this structure contains the data a format has to probe a file */
b9a281db 150typedef struct AVProbeData {
5c91a675 151 const char *filename;
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152 unsigned char *buf;
153 int buf_size;
154} AVProbeData;
155
0288a747 156#define AVPROBE_SCORE_MAX 100 ///< max score, half of that is used for file extension based detection
87e87886 157#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer
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158
159typedef struct AVFormatParameters {
c0df9d75 160 AVRational time_base;
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161 int sample_rate;
162 int channels;
163 int width;
164 int height;
4606ac8d 165 enum PixelFormat pix_fmt;
43d414ba 166 int channel; /**< used to select dv channel */
43d414ba 167 const char *standard; /**< tv standard, NTSC, PAL, SECAM */
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168 unsigned int mpeg2ts_raw:1; /**< force raw MPEG2 transport stream output, if possible */
169 unsigned int mpeg2ts_compute_pcr:1; /**< compute exact PCR for each transport
170 stream packet (only meaningful if
171 mpeg2ts_raw is TRUE) */
172 unsigned int initial_pause:1; /**< do not begin to play the stream
173 immediately (RTSP only) */
174 unsigned int prealloced_context:1;
71957315 175#if LIBAVFORMAT_VERSION_INT < (53<<16)
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176 enum CodecID video_codec_id;
177 enum CodecID audio_codec_id;
71957315 178#endif
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179} AVFormatParameters;
180
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181//! demuxer will use url_fopen, no opened file should be provided by the caller
182#define AVFMT_NOFILE 0x0001
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183#define AVFMT_NEEDNUMBER 0x0002 /**< needs '%d' in filename */
184#define AVFMT_SHOW_IDS 0x0008 /**< show format stream IDs numbers */
185#define AVFMT_RAWPICTURE 0x0020 /**< format wants AVPicture structure for
fb025625 186 raw picture data */
43d414ba 187#define AVFMT_GLOBALHEADER 0x0040 /**< format wants global header */
755bfeab 188#define AVFMT_NOTIMESTAMPS 0x0080 /**< format does not need / have any timestamps */
43d414ba 189#define AVFMT_GENERIC_INDEX 0x0100 /**< use generic index building code */
ff9c8d7c 190#define AVFMT_TS_DISCONT 0x0200 /**< format allows timestamo discontinuities */
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191
192typedef struct AVOutputFormat {
de6d9b64 193 const char *name;
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194 /**
195 * Descriptive name for the format, meant to be more human-readable
196 * than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro
197 * to define it.
198 */
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199 const char *long_name;
200 const char *mime_type;
cf29452b 201 const char *extensions; /**< comma separated filename extensions */
43d414ba 202 /** size of private data so that it can be allocated in the wrapper */
b9a281db 203 int priv_data_size;
de6d9b64 204 /* output support */
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205 enum CodecID audio_codec; /**< default audio codec */
206 enum CodecID video_codec; /**< default video codec */
de6d9b64 207 int (*write_header)(struct AVFormatContext *);
e928649b 208 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
de6d9b64 209 int (*write_trailer)(struct AVFormatContext *);
43d414ba 210 /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
b9a281db 211 int flags;
43d414ba 212 /** currently only used to set pixel format if not YUV420P */
290c5fa6 213 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
fe2d6fe2 214 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, AVPacket *in, int flush);
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215
216 /**
217 * list of supported codec_id-codec_tag pairs, ordered by "better choice first"
218 * the arrays are all CODEC_ID_NONE terminated
219 */
c1854592 220 const struct AVCodecTag * const *codec_tag;
7caf0cc6 221
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222 enum CodecID subtitle_codec; /**< default subtitle codec */
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
232 * than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro
233 * to define it.
234 */
b9a281db 235 const char *long_name;
43d414ba 236 /** size of private data so that it can be allocated in the wrapper */
b9a281db 237 int priv_data_size;
65d7d68b 238 /**
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239 * Tell if a given file has a chance of being parsed by this format.
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 *);
43d414ba 244 /** read the format header and initialize the AVFormatContext
de6d9b64 245 structure. Return 0 if OK. 'ap' if non NULL contains
e42dba48 246 additional paramters. 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);
43d414ba 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
da24c5e3 252 AVFMTCTX_NOHEADER is used. */
de6d9b64 253 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
43d414ba 254 /** close the stream. The AVFormatContext and AVStreams are not
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255 freed by this function */
256 int (*read_close)(struct AVFormatContext *);
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257 /**
258 * seek to a given timestamp relative to the frames in
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259 * stream component stream_index
260 * @param stream_index must not be -1
115329f1 261 * @param flags selects which direction should be preferred if no exact
3ba1438d 262 * match is available
05ce0f11 263 * @return >= 0 on success (but not necessarily the new offset)
3ba1438d 264 */
115329f1 265 int (*read_seek)(struct AVFormatContext *,
3ba1438d 266 int stream_index, int64_t timestamp, int flags);
8d14a25c 267 /**
2576a9ec 268 * gets the next timestamp in stream[stream_index].time_base units.
d9526386 269 * @return the timestamp or AV_NOPTS_VALUE if an error occurred
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270 */
271 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
272 int64_t *pos, int64_t pos_limit);
43d414ba 273 /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
de6d9b64 274 int flags;
43d414ba 275 /** if extensions are defined, then no probe is done. You should
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276 usually not use extension format guessing because it is not
277 reliable enough */
278 const char *extensions;
43d414ba 279 /** general purpose read only value that the format can use */
b9a281db 280 int value;
fb2758c8 281
43d414ba 282 /** start/resume playing - only meaningful if using a network based format
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283 (RTSP) */
284 int (*read_play)(struct AVFormatContext *);
285
43d414ba 286 /** pause playing - only meaningful if using a network based format
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287 (RTSP) */
288 int (*read_pause)(struct AVFormatContext *);
289
c1854592 290 const struct AVCodecTag * const *codec_tag;
7caf0cc6 291
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292 /* private fields */
293 struct AVInputFormat *next;
294} AVInputFormat;
de6d9b64 295
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296enum AVStreamParseType {
297 AVSTREAM_PARSE_NONE,
298 AVSTREAM_PARSE_FULL, /**< full parsing and repack */
299 AVSTREAM_PARSE_HEADERS, /**< only parse headers, don't repack */
300 AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on packet boundary */
301};
302
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303typedef struct AVIndexEntry {
304 int64_t pos;
305 int64_t timestamp;
306#define AVINDEX_KEYFRAME 0x0001
30a43f2d 307 int flags:2;
90b5b51e 308 int size:30; //Yeah, trying to keep the size of this small to reduce memory requirements (it is 24 vs 32 byte due to possible 8byte align).
43d414ba 309 int min_distance; /**< min distance between this and the previous keyframe, used to avoid unneeded searching */
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310} AVIndexEntry;
311
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312#define AV_DISPOSITION_DEFAULT 0x0001
313#define AV_DISPOSITION_DUB 0x0002
314#define AV_DISPOSITION_ORIGINAL 0x0004
315#define AV_DISPOSITION_COMMENT 0x0008
316#define AV_DISPOSITION_LYRICS 0x0010
317#define AV_DISPOSITION_KARAOKE 0x0020
318
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319/**
320 * Stream structure.
321 * New fields can be added to the end with minor version bumps.
8bfb108b 322 * Removal, reordering and changes to existing fields require a major
ba66ae94 323 * version bump.
8bfb108b 324 * sizeof(AVStream) must not be used outside libav*.
ba66ae94 325 */
de6d9b64 326typedef struct AVStream {
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327 int index; /**< stream index in AVFormatContext */
328 int id; /**< format specific stream id */
329 AVCodecContext *codec; /**< codec context */
b4b87d48 330 /**
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331 * Real base frame rate of the stream.
332 * This is the lowest frame rate with which all timestamps can be
864ff8c1 333 * represented accurately (it is the least common multiple of all
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334 * frame rates in the stream), Note, this value is just a guess!
335 * For example if the timebase is 1/90000 and all frames have either
336 * approximately 3600 or 1800 timer ticks then r_frame_rate will be 50/1.
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337 */
338 AVRational r_frame_rate;
de6d9b64 339 void *priv_data;
82583548 340
b9a281db 341 /* internal data used in av_find_stream_info() */
82583548 342 int64_t first_dts;
43d414ba 343 /** encoding: PTS generation when outputing stream */
a9fd2b19 344 struct AVFrac pts;
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345
346 /**
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347 * This is the fundamental unit of time (in seconds) in terms
348 * of which frame timestamps are represented. For fixed-fps content,
349 * timebase should be 1/frame rate and timestamp increments should be
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350 * identically 1.
351 */
9ee91c2f 352 AVRational time_base;
43d414ba 353 int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
a48b7a6b 354 /* ffmpeg.c private use */
15786dc4 355 int stream_copy; /**< if set, just copy stream */
755bfeab 356 enum AVDiscard discard; ///< selects which packets can be discarded at will and do not need to be demuxed
b4aea108 357 //FIXME move stuff to a flags field?
43d414ba 358 /** quality, as it has been removed from AVCodecContext and put in AVVideoFrame
755bfeab 359 * MN: dunno if that is the right place for it */
115329f1 360 float quality;
6d96a9b9 361 /**
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362 * Decoding: pts of the first frame of the stream, in stream time base.
363 * Only set this if you are absolutely 100% sure that the value you set
364 * it to really is the pts of the first frame.
4854c253 365 * This may be undefined (AV_NOPTS_VALUE).
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366 * @note The ASF header does NOT contain a correct start_time the ASF
367 * demuxer must NOT set this.
6d96a9b9 368 */
115329f1 369 int64_t start_time;
e26381b6 370 /**
8bfb108b 371 * Decoding: duration of the stream, in stream time base.
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372 * If a source file does not specify a duration, but does specify
373 * a bitrate, this value will be estimates from bit rate and file size.
374 */
ee404803 375 int64_t duration;
fb2758c8 376
43d414ba 377 char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
09730260 378
fb2758c8 379 /* av_read_frame() support */
57004ff1 380 enum AVStreamParseType need_parsing;
fb2758c8 381 struct AVCodecParserContext *parser;
6ec87caa 382
fb2758c8 383 int64_t cur_dts;
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384 int last_IP_duration;
385 int64_t last_IP_pts;
fb2758c8 386 /* av_seek_frame() support */
43d414ba 387 AVIndexEntry *index_entries; /**< only used if the format does not
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388 support seeking natively */
389 int nb_index_entries;
191e8ca7 390 unsigned int index_entries_allocated_size;
115329f1 391
b4b87d48 392 int64_t nb_frames; ///< number of frames in this stream if known or 0
504ee036 393
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394#if LIBAVFORMAT_VERSION_INT < (53<<16)
395 int64_t unused[4+1];
396#endif
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397
398 char *filename; /**< source filename of the stream */
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399
400 int disposition; /**< AV_DISPOSITION_* bitfield */
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401
402 AVProbeData probe_data;
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403#define MAX_REORDER_DELAY 16
404 int64_t pts_buffer[MAX_REORDER_DELAY+1];
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405
406 /**
407 * sample aspect ratio (0 if unknown)
408 * - encoding: Set by user.
409 * - decoding: Set by libavformat.
410 */
411 AVRational sample_aspect_ratio;
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412} AVStream;
413
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414#define AV_PROGRAM_RUNNING 1
415
ba66ae94 416/**
ba66ae94 417 * New fields can be added to the end with minor version bumps.
8bfb108b 418 * Removal, reordering and changes to existing fields require a major
ba66ae94 419 * version bump.
8bfb108b 420 * sizeof(AVProgram) must not be used outside libav*.
ba66ae94 421 */
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422typedef struct AVProgram {
423 int id;
424 char *provider_name; ///< Network name for DVB streams
425 char *name; ///< Service name for DVB streams
426 int flags;
427 enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller
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428 unsigned int *stream_index;
429 unsigned int nb_stream_indexes;
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430} AVProgram;
431
43d414ba 432#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present
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433 (streams are added dynamically) */
434
79d7836a 435typedef struct AVChapter {
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436 int id; ///< Unique id to identify the chapter
437 AVRational time_base; ///< Timebase in which the start/end timestamps are specified
8931e7b4 438 int64_t start, end; ///< chapter start/end time in time_base units
c2fb6be4 439 char *title; ///< chapter title
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440} AVChapter;
441
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442#define MAX_STREAMS 20
443
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444/**
445 * format I/O context.
446 * New fields can be added to the end with minor version bumps.
8bfb108b 447 * Removal, reordering and changes to existing fields require a major
252f17e2 448 * version bump.
8bfb108b 449 * sizeof(AVFormatContext) must not be used outside libav*.
252f17e2 450 */
de6d9b64 451typedef struct AVFormatContext {
43d414ba 452 const AVClass *av_class; /**< set by av_alloc_format_context */
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453 /* can only be iformat or oformat, not both at the same time */
454 struct AVInputFormat *iformat;
455 struct AVOutputFormat *oformat;
de6d9b64 456 void *priv_data;
899681cd 457 ByteIOContext *pb;
db69c2e5 458 unsigned int nb_streams;
de6d9b64 459 AVStream *streams[MAX_STREAMS];
43d414ba 460 char filename[1024]; /**< input or output filename */
de6d9b64 461 /* stream info */
4568325a 462 int64_t timestamp;
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463 char title[512];
464 char author[512];
465 char copyright[512];
466 char comment[512];
6a58e151 467 char album[512];
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468 int year; /**< ID3 year, 0 if none */
469 int track; /**< track number, 0 if none */
470 char genre[32]; /**< ID3 genre */
6a58e151 471
43d414ba 472 int ctx_flags; /**< format specific flags, see AVFMTCTX_xx */
916c80e9 473 /* private data for pts handling (do not modify directly) */
43d414ba 474 /** This buffer is only needed when packets were already buffered but
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475 not decoded, for example to get the codec parameters in mpeg
476 streams */
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477 struct AVPacketList *packet_buffer;
478
43d414ba 479 /** decoding: position of the first frame of the component, in
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480 AV_TIME_BASE fractional seconds. NEVER set this value directly:
481 it is deduced from the AVStream values. */
115329f1 482 int64_t start_time;
43d414ba 483 /** decoding: duration of the stream, in AV_TIME_BASE fractional
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484 seconds. NEVER set this value directly: it is deduced from the
485 AVStream values. */
486 int64_t duration;
43d414ba 487 /** decoding: total file size. 0 if unknown */
ee404803 488 int64_t file_size;
43d414ba 489 /** decoding: total stream bitrate in bit/s, 0 if not
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490 available. Never set it directly if the file_size and the
491 duration are known as ffmpeg can compute it automatically. */
492 int bit_rate;
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493
494 /* av_read_frame() support */
495 AVStream *cur_st;
496 const uint8_t *cur_ptr;
497 int cur_len;
498 AVPacket cur_pkt;
499
fb2758c8 500 /* av_seek_frame() support */
43d414ba 501 int64_t data_offset; /** offset of the first packet */
fb2758c8 502 int index_built;
115329f1 503
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504 int mux_rate;
505 int packet_size;
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506 int preload;
507 int max_delay;
8108551a 508
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509#define AVFMT_NOOUTPUTLOOP -1
510#define AVFMT_INFINITEOUTPUTLOOP 0
43d414ba 511 /** number of times to loop output in formats that support it */
8108551a 512 int loop_output;
115329f1 513
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514 int flags;
515#define AVFMT_FLAG_GENPTS 0x0001 ///< generate pts if missing even if it requires parsing future frames
2c00106c 516#define AVFMT_FLAG_IGNIDX 0x0002 ///< ignore index
bf09c2e2 517#define AVFMT_FLAG_NONBLOCK 0x0004 ///< do not block when reading packets from input
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518
519 int loop_input;
43d414ba 520 /** decoding: size of data to probe; encoding unused */
9e6c9470 521 unsigned int probesize;
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522
523 /**
524 * maximum duration in AV_TIME_BASE units over which the input should be analyzed in av_find_stream_info()
525 */
526 int max_analyze_duration;
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527
528 const uint8_t *key;
529 int keylen;
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530
531 unsigned int nb_programs;
532 AVProgram **programs;
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533
534 /**
535 * Forced video codec_id.
536 * demuxing: set by user
537 */
538 enum CodecID video_codec_id;
539 /**
540 * Forced audio codec_id.
541 * demuxing: set by user
542 */
543 enum CodecID audio_codec_id;
544 /**
545 * Forced subtitle codec_id.
546 * demuxing: set by user
547 */
548 enum CodecID subtitle_codec_id;
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549
550 /**
551 * Maximum amount of memory in bytes to use per stream for the index.
552 * If the needed index exceeds this size entries will be discarded as
553 * needed to maintain a smaller size. This can lead to slower or less
554 * accurate seeking (depends on demuxer).
555 * Demuxers for which a full in memory index is mandatory will ignore
556 * this.
557 * muxing : unused
558 * demuxing: set by user
559 */
560 unsigned int max_index_size;
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561
562 /**
ffa71b2b 563 * Maximum amount of memory in bytes to use for buffering frames
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564 * obtained from real-time capture devices.
565 */
566 unsigned int max_picture_buffer;
79d7836a 567
fbabf1e9 568 unsigned int nb_chapters;
79d7836a 569 AVChapter **chapters;
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570
571 /**
572 * Flags to enable debuging.
573 */
574 int debug;
575#define FF_FDEBUG_TS 0x0001
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576
577 /**
578 * raw packets from the demuxer, prior to parsing and decoding.
579 * This buffer is used for buffering packets until the codec can
580 * be identified, as parsing cannot be done without knowing the
581 * codec.
582 */
583 struct AVPacketList *raw_packet_buffer;
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584 struct AVPacketList *raw_packet_buffer_end;
585
586 struct AVPacketList *packet_buffer_end;
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587} AVFormatContext;
588
589typedef struct AVPacketList {
590 AVPacket pkt;
591 struct AVPacketList *next;
592} AVPacketList;
593
84be6e72 594#if LIBAVFORMAT_VERSION_INT < (53<<16)
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595extern AVInputFormat *first_iformat;
596extern AVOutputFormat *first_oformat;
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597#endif
598
599AVInputFormat *av_iformat_next(AVInputFormat *f);
600AVOutputFormat *av_oformat_next(AVOutputFormat *f);
de6d9b64 601
5b6d5596 602enum CodecID av_guess_image2_codec(const char *filename);
290c5fa6 603
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604/* XXX: use automatic init with either ELF sections or C file parser */
605/* modules */
de6d9b64 606
b9a281db 607/* utils.c */
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608void av_register_input_format(AVInputFormat *format);
609void av_register_output_format(AVOutputFormat *format);
115329f1 610AVOutputFormat *guess_stream_format(const char *short_name,
36ada60c 611 const char *filename, const char *mime_type);
115329f1 612AVOutputFormat *guess_format(const char *short_name,
b9a281db 613 const char *filename, const char *mime_type);
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614
615/**
616 * Guesses the codec id based upon muxer and filename.
617 */
115329f1 618enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
5b6d5596 619 const char *filename, const char *mime_type, enum CodecType type);
de6d9b64 620
3217cb42 621/**
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622 * Send a nice hexadecimal dump of a buffer to the specified file stream.
623 *
624 * @param f The file stream pointer where the dump should be sent to.
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625 * @param buf buffer
626 * @param size buffer size
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627 *
628 * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
3217cb42 629 */
fb2758c8 630void av_hex_dump(FILE *f, uint8_t *buf, int size);
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631
632/**
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633 * Send a nice hexadecimal dump of a buffer to the log.
634 *
635 * @param avcl A pointer to an arbitrary struct of which the first field is a
636 * pointer to an AVClass struct.
637 * @param level The importance level of the message, lower values signifying
638 * higher importance.
639 * @param buf buffer
640 * @param size buffer size
641 *
642 * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
643 */
644void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
645
646/**
647 * Send a nice dump of a packet to the specified file stream.
648 *
649 * @param f The file stream pointer where the dump should be sent to.
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650 * @param pkt packet to dump
651 * @param dump_payload true if the payload must be displayed too
652 */
fb2758c8 653void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
de6d9b64 654
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655/**
656 * Send a nice dump of a packet to the log.
657 *
658 * @param avcl A pointer to an arbitrary struct of which the first field is a
659 * pointer to an AVClass struct.
660 * @param level The importance level of the message, lower values signifying
661 * higher importance.
662 * @param pkt packet to dump
663 * @param dump_payload true if the payload must be displayed too
664 */
665void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
666
94988531 667void av_register_all(void);
de6d9b64 668
43d414ba 669/** codec tag <-> codec id */
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670enum CodecID av_codec_get_id(const struct AVCodecTag **tags, unsigned int tag);
671unsigned int av_codec_get_tag(const struct AVCodecTag **tags, enum CodecID id);
7caf0cc6 672
b9a281db 673/* media file input */
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674
675/**
676 * finds AVInputFormat based on input format's short name.
677 */
b9a281db 678AVInputFormat *av_find_input_format(const char *short_name);
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679
680/**
681 * Guess file format.
682 *
683 * @param is_opened whether the file is already opened, determines whether
684 * demuxers with or without AVFMT_NOFILE are probed
685 */
94988531 686AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
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687
688/**
689 * Allocates all the structures needed to read an input stream.
690 * This does not open the needed codecs for decoding the stream[s].
691 */
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692int av_open_input_stream(AVFormatContext **ic_ptr,
693 ByteIOContext *pb, const char *filename,
da24c5e3 694 AVInputFormat *fmt, AVFormatParameters *ap);
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695
696/**
864ff8c1 697 * Open a media file as input. The codecs are not opened. Only the file
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698 * header (if present) is read.
699 *
700 * @param ic_ptr the opened media file handle is put here
701 * @param filename filename to open.
702 * @param fmt if non NULL, force the file format to use
703 * @param buf_size optional buffer size (zero if default is OK)
e42dba48 704 * @param ap additional parameters needed when opening the file (NULL if default)
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705 * @return 0 if OK. AVERROR_xxx otherwise.
706 */
115329f1 707int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
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708 AVInputFormat *fmt,
709 int buf_size,
710 AVFormatParameters *ap);
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711/**
712 * Allocate an AVFormatContext.
5d81d641 713 * Can be freed with av_free() but do not forget to free everything you
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714 * explicitly allocated as well!
715 */
bc874dae 716AVFormatContext *av_alloc_format_context(void);
b9a281db 717
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718/**
719 * Read packets of a media file to get stream information. This
720 * is useful for file formats with no headers such as MPEG. This
721 * function also computes the real frame rate in case of mpeg2 repeat
722 * frame mode.
723 * The logical file position is not changed by this function;
724 * examined packets may be buffered for later processing.
725 *
726 * @param ic media file handle
727 * @return >=0 if OK. AVERROR_xxx if error.
4e8988a3 728 * @todo Let user decide somehow what information is needed so we do not waste time getting stuff the user does not need.
3217cb42 729 */
b9a281db 730int av_find_stream_info(AVFormatContext *ic);
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731
732/**
733 * Read a transport packet from a media file.
734 *
864ff8c1 735 * This function is obsolete and should never be used.
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736 * Use av_read_frame() instead.
737 *
738 * @param s media file handle
739 * @param pkt is filled
740 * @return 0 if OK. AVERROR_xxx if error.
741 */
de6d9b64 742int av_read_packet(AVFormatContext *s, AVPacket *pkt);
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743
744/**
745 * Return the next frame of a stream.
746 *
747 * The returned packet is valid
748 * until the next av_read_frame() or until av_close_input_file() and
749 * must be freed with av_free_packet. For video, the packet contains
750 * exactly one frame. For audio, it contains an integer number of
751 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
752 * data). If the audio frames have a variable size (e.g. MPEG audio),
753 * then it contains one frame.
754 *
755 * pkt->pts, pkt->dts and pkt->duration are always set to correct
a050f802 756 * values in AVStream.timebase units (and guessed if the format cannot
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757 * provided them). pkt->pts can be AV_NOPTS_VALUE if the video format
758 * has B frames, so it is better to rely on pkt->dts if you do not
759 * decompress the payload.
760 *
761 * @return 0 if OK, < 0 if error or end of file.
762 */
fb2758c8 763int av_read_frame(AVFormatContext *s, AVPacket *pkt);
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764
765/**
766 * Seek to the key frame at timestamp.
767 * 'timestamp' in 'stream_index'.
768 * @param stream_index If stream_index is (-1), a default
769 * stream is selected, and timestamp is automatically converted
770 * from AV_TIME_BASE units to the stream specific time_base.
771 * @param timestamp timestamp in AVStream.time_base units
772 * or if there is no stream specified then in AV_TIME_BASE units
773 * @param flags flags which select direction and seeking mode
774 * @return >= 0 on success
775 */
3ba1438d 776int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags);
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777
778/**
779 * start playing a network based stream (e.g. RTSP stream) at the
780 * current position
781 */
fb2758c8 782int av_read_play(AVFormatContext *s);
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783
784/**
785 * Pause a network based stream (e.g. RTSP stream).
786 *
787 * Use av_read_play() to resume it.
788 */
fb2758c8 789int av_read_pause(AVFormatContext *s);
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790
791/**
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792 * Free a AVFormatContext allocated by av_open_input_stream.
793 * @param s context to free
794 */
795void av_close_input_stream(AVFormatContext *s);
796
797/**
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798 * Close a media file (but not its codecs).
799 *
800 * @param s media file handle
801 */
de6d9b64 802void av_close_input_file(AVFormatContext *s);
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803
804/**
805 * Add a new stream to a media file.
806 *
807 * Can only be called in the read_header() function. If the flag
808 * AVFMTCTX_NOHEADER is in the format context, then new streams
809 * can be added in read_packet too.
810 *
811 * @param s media file handle
812 * @param id file format dependent stream id
813 */
b9a281db 814AVStream *av_new_stream(AVFormatContext *s, int id);
15afa396 815AVProgram *av_new_program(AVFormatContext *s, int id);
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816
817/**
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818 * Add a new chapter.
819 * This function is NOT part of the public API
820 * and should be ONLY used by demuxers.
821 *
822 * @param s media file handle
7a2a3e8e 823 * @param id unique id for this chapter
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824 * @param start chapter start time in time_base units
825 * @param end chapter end time in time_base units
79d7836a 826 * @param title chapter title
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827 *
828 * @return AVChapter or NULL if error.
79d7836a 829 */
abd2256d 830AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title);
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831
832/**
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833 * Set the pts for a given stream.
834 *
835 * @param s stream
836 * @param pts_wrap_bits number of bits effectively used by the pts
837 * (used for wrap control, 33 is the value for MPEG)
838 * @param pts_num numerator to convert to seconds (MPEG: 1)
839 * @param pts_den denominator to convert to seconds (MPEG: 90000)
840 */
9ee91c2f 841void av_set_pts_info(AVStream *s, int pts_wrap_bits,
916c80e9 842 int pts_num, int pts_den);
de6d9b64 843
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844#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
845#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes
27a5fe5f 846#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non keyframes
3ba1438d 847
b754978a 848int av_find_default_stream_index(AVFormatContext *s);
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849
850/**
851 * Gets the index for a specific timestamp.
852 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond to
853 * the timestamp which is <= the requested one, if backward is 0
854 * then it will be >=
855 * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
856 * @return < 0 if no such timestamp could be found
857 */
dc56fc38 858int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
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859
860/**
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861 * Ensures the index uses less memory than the maximum specified in
862 * AVFormatContext.max_index_size, by discarding entries if it grows
863 * too large.
864 * This function is not part of the public API and should only be called
865 * by demuxers.
866 */
867void ff_reduce_index(AVFormatContext *s, int stream_index);
868
869/**
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870 * Add a index entry into a sorted list updateing if it is already there.
871 *
872 * @param timestamp timestamp in the timebase of the given stream
873 */
3e9245a9 874int av_add_index_entry(AVStream *st,
30a43f2d 875 int64_t pos, int64_t timestamp, int size, int distance, int flags);
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876
877/**
878 * Does a binary search using av_index_search_timestamp() and AVCodec.read_timestamp().
755bfeab 879 * This is not supposed to be called directly by a user application, but by demuxers.
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880 * @param target_ts target timestamp in the time base of the given stream
881 * @param stream_index stream number
882 */
3ba1438d 883int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags);
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884
885/**
886 * Updates cur_dts of all streams based on given timestamp and AVStream.
887 *
888 * Stream ref_st unchanged, others set cur_dts in their native timebase
755bfeab 889 * only needed for timestamp wrapping or if (dts not set and pts!=dts).
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890 * @param timestamp new dts expressed in time_base of param ref_st
891 * @param ref_st reference stream giving time_base of param timestamp
892 */
22ffac70 893void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
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894
895/**
896 * Does a binary search using read_timestamp().
755bfeab 897 * This is not supposed to be called directly by a user application, but by demuxers.
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898 * @param target_ts target timestamp in the time base of the given stream
899 * @param stream_index stream number
900 */
89ddd2a9 901int64_t av_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
b754978a 902
43d414ba 903/** media file output */
290c5fa6 904int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
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905
906/**
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907 * Allocate the stream private data and write the stream header to an
908 * output media file.
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909 *
910 * @param s media file handle
911 * @return 0 if OK. AVERROR_xxx if error.
912 */
b9a281db 913int av_write_header(AVFormatContext *s);
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914
915/**
916 * Write a packet to an output media file.
917 *
918 * The packet shall contain one audio or video frame.
919 * The packet must be correctly interleaved according to the container specification,
920 * if not then av_interleaved_write_frame must be used
921 *
922 * @param s media file handle
923 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
924 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
925 */
e928649b 926int av_write_frame(AVFormatContext *s, AVPacket *pkt);
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927
928/**
929 * Writes a packet to an output media file ensuring correct interleaving.
930 *
931 * The packet must contain one audio or video frame.
932 * If the packets are already correctly interleaved the application should
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933 * call av_write_frame() instead as it is slightly faster. It is also important
934 * to keep in mind that completely non-interleaved input will need huge amounts
935 * of memory to interleave with this, so it is preferable to interleave at the
936 * demuxer level.
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937 *
938 * @param s media file handle
939 * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
940 * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
941 */
3c895fc0 942int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
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943
944/**
945 * Interleave a packet per DTS in an output media file.
946 *
947 * Packets with pkt->destruct == av_destruct_packet will be freed inside this function,
948 * so they cannot be used after it, note calling av_free_packet() on them is still safe.
949 *
950 * @param s media file handle
951 * @param out the interleaved packet will be output here
952 * @param in the input packet
953 * @param flush 1 if no further packets are available as input and all
954 * remaining packets should be output
955 * @return 1 if a packet was output, 0 if no packet could be output,
d9526386 956 * < 0 if an error occurred
3217cb42 957 */
f21c0b4c 958int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush);
e928649b 959
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960/**
961 * @brief Write the stream trailer to an output media file and
962 * free the file private data.
963 *
964 * @param s media file handle
965 * @return 0 if OK. AVERROR_xxx if error.
966 */
b9a281db 967int av_write_trailer(AVFormatContext *s);
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968
969void dump_format(AVFormatContext *ic,
115329f1 970 int index,
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971 const char *url,
972 int is_output);
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973
974/**
975 * parses width and height out of string str.
26ef3220 976 * @deprecated Use av_parse_video_frame_size instead.
3217cb42 977 */
26ef3220 978attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr, const char *str);
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979
980/**
981 * Converts frame rate from string to a fraction.
26ef3220 982 * @deprecated Use av_parse_video_frame_rate instead.
3217cb42 983 */
26ef3220 984attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base, const char *arg);
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985
986/**
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987 * Parses \p datestr and returns a corresponding number of microseconds.
988 * @param datestr String representing a date or a duration.
989 * - If a date the syntax is:
3217cb42 990 * @code
3217cb42 991 * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
3217cb42 992 * @endcode
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993 * Time is localtime unless Z is appended, in which case it is
994 * interpreted as UTC.
995 * If the year-month-day part isn't specified it takes the current
996 * year-month-day.
997 * Returns the number of microseconds since 1st of January, 1970 up to
998 * the time of the parsed date or INT64_MIN if \p datestr cannot be
999 * successfully parsed.
1000 * - If a duration the syntax is:
1001 * @code
1002 * [-]HH[:MM[:SS[.m...]]]
1003 * [-]S+[.m...]
1004 * @endcode
1005 * Returns the number of microseconds contained in a time interval
1006 * with the specified duration or INT64_MIN if \p datestr cannot be
7338d368 1007 * successfully parsed.
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1008 * @param duration Flag which tells how to interpret \p datestr, if
1009 * not zero \p datestr is interpreted as a duration, otherwise as a
1010 * date.
3217cb42 1011 */
0c1a9eda 1012int64_t parse_date(const char *datestr, int duration);
de6d9b64 1013
0c1a9eda 1014int64_t av_gettime(void);
94988531 1015
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1016/* ffm specific for ffserver */
1017#define FFM_PACKET_SIZE 4096
1018offset_t ffm_read_write_index(int fd);
1019void ffm_write_write_index(int fd, offset_t pos);
1020void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size);
1021
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1022/**
1023 * Attempts to find a specific tag in a URL.
1024 *
1025 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
1026 * Return 1 if found.
1027 */
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1028int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
1029
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1030/**
1031 * Returns in 'buf' the path with '%d' replaced by number.
1032
1033 * Also handles the '%0nd' format where 'n' is the total number
1034 * of digits and '%%'.
1035 *
1036 * @param buf destination buffer
1037 * @param buf_size destination buffer size
1038 * @param path numbered sequence string
8ea0e802 1039 * @param number frame number
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1040 * @return 0 if OK, -1 if format error.
1041 */
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1042int av_get_frame_filename(char *buf, int buf_size,
1043 const char *path, int number);
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1044
1045/**
1046 * Check whether filename actually is a numbered sequence generator.
1047 *
1048 * @param filename possible numbered sequence string
1049 * @return 1 if a valid numbered sequence string, 0 otherwise.
1050 */
5c07cf53 1051int av_filename_number_test(const char *filename);
96baaa6a 1052
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1053/**
1054 * Generate an SDP for an RTP session.
1055 *
1056 * @param ac array of AVFormatContexts describing the RTP streams. If the
1057 * array is composed by only one context, such context can contain
1058 * multiple AVStreams (one AVStream per RTP stream). Otherwise,
1059 * all the contexts in the array (an AVCodecContext per RTP stream)
1060 * must contain only one AVStream
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1061 * @param n_files number of AVCodecContexts contained in ac
1062 * @param buff buffer where the SDP will be stored (must be allocated by
1063 * the caller
1064 * @param size the size of the buffer
1065 * @return 0 if OK. AVERROR_xxx if error.
c5388c07 1066 */
8767b80f 1067int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
c5388c07 1068
fb025625 1069#ifdef HAVE_AV_CONFIG_H
f71869a4 1070
903a2e86 1071void ff_dynarray_add(unsigned long **tab_ptr, int *nb_ptr, unsigned long elem);
39f472c3 1072
e4e70d2e 1073#ifdef __GNUC__
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1074#define dynarray_add(tab, nb_ptr, elem)\
1075do {\
1076 typeof(tab) _tab = (tab);\
1077 typeof(elem) _elem = (elem);\
1078 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
903a2e86 1079 ff_dynarray_add((unsigned long **)_tab, nb_ptr, (unsigned long)_elem);\
39f472c3 1080} while(0)
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1081#else
1082#define dynarray_add(tab, nb_ptr, elem)\
1083do {\
903a2e86 1084 ff_dynarray_add((unsigned long **)(tab), nb_ptr, (unsigned long)(elem));\
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1085} while(0)
1086#endif
39f472c3 1087
f71869a4 1088time_t mktimegm(struct tm *tm);
0c9fc6e1 1089struct tm *brktimegm(time_t secs, struct tm *tm);
115329f1 1090const char *small_strptime(const char *p, const char *fmt,
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1091 struct tm *dt);
1092
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1093struct in_addr;
1094int resolve_host(struct in_addr *sin_addr, const char *hostname);
1095
1096void url_split(char *proto, int proto_size,
6ba5cbc6 1097 char *authorization, int authorization_size,
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1098 char *hostname, int hostname_size,
1099 int *port_ptr,
1100 char *path, int path_size,
1101 const char *url);
1102
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1103int match_ext(const char *filename, const char *extensions);
1104
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1105#endif /* HAVE_AV_CONFIG_H */
1106
5b21bdab 1107#endif /* FFMPEG_AVFORMAT_H */