1/* 2 * copyright (c) 2001 Fabrice Bellard 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVFORMAT_AVFORMAT_H 22#define AVFORMAT_AVFORMAT_H 23 24#define LIBAVFORMAT_VERSION_MAJOR 52 25#define LIBAVFORMAT_VERSION_MINOR 31 26#define LIBAVFORMAT_VERSION_MICRO 0 27 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) 34#define LIBAVFORMAT_BUILD LIBAVFORMAT_VERSION_INT 35 36#define LIBAVFORMAT_IDENT "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION) 37 38/** 39 * Returns the LIBAVFORMAT_VERSION_INT constant. 40 */ 41unsigned avformat_version(void); 42 43#include <time.h> 44#include <stdio.h> /* FILE */ 45#include "libavcodec/avcodec.h" 46 47#include "avio.h" 48 49struct AVFormatContext; 50 51 52/* 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 66 * with a dash character ('-') and the ISO 639 3-letter language code. 67 * For example: Author-ger=Michael, Author-eng=Mike 68 * The original/default language is in the unqualified "Author" tag. 69 * A demuxer should set a default if it sets any translated tag. 70 */ 71 72#define AV_METADATA_MATCH_CASE 1 73#define AV_METADATA_IGNORE_SUFFIX 2 74 75typedef struct { 76 char *key; 77 char *value; 78}AVMetadataTag; 79 80typedef struct AVMetadata AVMetadata; 81typedef struct AVMetadataConv AVMetadataConv; 82 83/** 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. 88 */ 89AVMetadataTag * 90av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags); 91 92/** 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 97 */ 98int av_metadata_set(AVMetadata **pm, const char *key, const char *value); 99 100/** 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/** 110 * Frees all the memory allocated for an AVMetadata struct. 111 */ 112void av_metadata_free(AVMetadata **m); 113 114 115/* packet functions */ 116 117typedef struct AVPacket { 118 /** 119 * Presentation timestamp in time_base units; the time at which the 120 * decompressed packet will be presented to the user. 121 * Can be AV_NOPTS_VALUE if it is not stored in the file. 122 * pts MUST be larger or equal to dts as presentation cannot happen before 123 * decompression, unless one wants to view hex dumps. Some formats misuse 124 * the terms dts and pts/cts to mean something different. Such timestamps 125 * must be converted to true pts/dts before they are stored in AVPacket. 126 */ 127 int64_t pts; 128 /** 129 * Decompression timestamp in time_base units; the time at which the 130 * packet is decompressed. 131 * Can be AV_NOPTS_VALUE if it is not stored in the file. 132 */ 133 int64_t dts; 134 uint8_t *data; 135 int size; 136 int stream_index; 137 int flags; 138 /** 139 * Duration of this packet in time_base units, 0 if unknown. 140 * Equals next_pts - this_pts in presentation order. 141 */ 142 int duration; 143 void (*destruct)(struct AVPacket *); 144 void *priv; 145 int64_t pos; ///< byte position in stream, -1 if unknown 146 147 /** 148 * Time difference in stream time base units from the pts of this 149 * packet to the point at which the output from the decoder has converged 150 * independent from the availability of previous frames. That is, the 151 * frames are virtually identical no matter if decoding started from 152 * the very first frame or from this keyframe. 153 * Is AV_NOPTS_VALUE if unknown. 154 * This field is not the display duration of the current packet. 155 * 156 * The purpose of this field is to allow seeking in streams that have no 157 * keyframes in the conventional sense. It corresponds to the 158 * recovery point SEI in H.264 and match_time_delta in NUT. It is also 159 * essential for some types of subtitle streams to ensure that all 160 * subtitles are correctly displayed after seeking. 161 */ 162 int64_t convergence_duration; 163} AVPacket; 164#define PKT_FLAG_KEY 0x0001 165 166void av_destruct_packet_nofree(AVPacket *pkt); 167 168/** 169 * Default packet destructor. 170 */ 171void av_destruct_packet(AVPacket *pkt); 172 173/** 174 * Initialize optional fields of a packet with default values. 175 * 176 * @param pkt packet 177 */ 178void av_init_packet(AVPacket *pkt); 179 180/** 181 * Allocate the payload of a packet and initialize its fields with 182 * default values. 183 * 184 * @param pkt packet 185 * @param size wanted payload size 186 * @return 0 if OK, AVERROR_xxx otherwise 187 */ 188int av_new_packet(AVPacket *pkt, int size); 189 190/** 191 * Allocate and read the payload of a packet and initialize its fields with 192 * default values. 193 * 194 * @param pkt packet 195 * @param size desired payload size 196 * @return >0 (read size) if OK, AVERROR_xxx otherwise 197 */ 198int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size); 199 200/** 201 * @warning This is a hack - the packet memory allocation stuff is broken. The 202 * packet is allocated if it was not really allocated. 203 */ 204int av_dup_packet(AVPacket *pkt); 205 206/** 207 * Free a packet. 208 * 209 * @param pkt packet to free 210 */ 211static inline void av_free_packet(AVPacket *pkt) 212{ 213 if (pkt && pkt->destruct) { 214 pkt->destruct(pkt); 215 } 216} 217 218/*************************************************/ 219/* fractional numbers for exact pts handling */ 220 221/** 222 * The exact value of the fractional number is: 'val + num / den'. 223 * num is assumed to be 0 <= num < den. 224 */ 225typedef struct AVFrac { 226 int64_t val, num, den; 227} AVFrac; 228 229/*************************************************/ 230/* input/output formats */ 231 232struct AVCodecTag; 233 234/** This structure contains the data a format has to probe a file. */ 235typedef struct AVProbeData { 236 const char *filename; 237 unsigned char *buf; 238 int buf_size; 239} AVProbeData; 240 241#define AVPROBE_SCORE_MAX 100 ///< maximum score, half of that is used for file-extension-based detection 242#define AVPROBE_PADDING_SIZE 32 ///< extra allocated bytes at the end of the probe buffer 243 244typedef struct AVFormatParameters { 245 AVRational time_base; 246 int sample_rate; 247 int channels; 248 int width; 249 int height; 250 enum PixelFormat pix_fmt; 251 int channel; /**< Used to select DV channel. */ 252 const char *standard; /**< TV standard, NTSC, PAL, SECAM */ 253 unsigned int mpeg2ts_raw:1; /**< Force raw MPEG-2 transport stream output, if possible. */ 254 unsigned int mpeg2ts_compute_pcr:1; /**< Compute exact PCR for each transport 255 stream packet (only meaningful if 256 mpeg2ts_raw is TRUE). */ 257 unsigned int initial_pause:1; /**< Do not begin to play the stream 258 immediately (RTSP only). */ 259 unsigned int prealloced_context:1; 260#if LIBAVFORMAT_VERSION_INT < (53<<16) 261 enum CodecID video_codec_id; 262 enum CodecID audio_codec_id; 263#endif 264} AVFormatParameters; 265 266//! Demuxer will use url_fopen, no opened file should be provided by the caller. 267#define AVFMT_NOFILE 0x0001 268#define AVFMT_NEEDNUMBER 0x0002 /**< Needs '%d' in filename. */ 269#define AVFMT_SHOW_IDS 0x0008 /**< Show format stream IDs numbers. */ 270#define AVFMT_RAWPICTURE 0x0020 /**< Format wants AVPicture structure for 271 raw picture data. */ 272#define AVFMT_GLOBALHEADER 0x0040 /**< Format wants global header. */ 273#define AVFMT_NOTIMESTAMPS 0x0080 /**< Format does not need / have any timestamps. */ 274#define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */ 275#define AVFMT_TS_DISCONT 0x0200 /**< Format allows timestamp discontinuities. */ 276#define AVFMT_VARIABLE_FPS 0x0400 /**< Format allows variable fps. */ 277 278typedef struct AVOutputFormat { 279 const char *name; 280 /** 281 * Descriptive name for the format, meant to be more human-readable 282 * than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro 283 * to define it. 284 */ 285 const char *long_name; 286 const char *mime_type; 287 const char *extensions; /**< comma-separated filename extensions */ 288 /** size of private data so that it can be allocated in the wrapper */ 289 int priv_data_size; 290 /* output support */ 291 enum CodecID audio_codec; /**< default audio codec */ 292 enum CodecID video_codec; /**< default video codec */ 293 int (*write_header)(struct AVFormatContext *); 294 int (*write_packet)(struct AVFormatContext *, AVPacket *pkt); 295 int (*write_trailer)(struct AVFormatContext *); 296 /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */ 297 int flags; 298 /** Currently only used to set pixel format if not YUV420P. */ 299 int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *); 300 int (*interleave_packet)(struct AVFormatContext *, AVPacket *out, 301 AVPacket *in, int flush); 302 303 /** 304 * List of supported codec_id-codec_tag pairs, ordered by "better 305 * choice first". The arrays are all terminated by CODEC_ID_NONE. 306 */ 307 const struct AVCodecTag * const *codec_tag; 308 309 enum CodecID subtitle_codec; /**< default subtitle codec */ 310 311 const AVMetadataConv *metadata_conv; 312 313 /* private fields */ 314 struct AVOutputFormat *next; 315} AVOutputFormat; 316 317typedef struct AVInputFormat { 318 const char *name; 319 /** 320 * Descriptive name for the format, meant to be more human-readable 321 * than \p name. You \e should use the NULL_IF_CONFIG_SMALL() macro 322 * to define it. 323 */ 324 const char *long_name; 325 /** Size of private data so that it can be allocated in the wrapper. */ 326 int priv_data_size; 327 /** 328 * Tell if a given file has a chance of being parsed as this format. 329 * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes 330 * big so you do not have to check for that unless you need more. 331 */ 332 int (*read_probe)(AVProbeData *); 333 /** Read the format header and initialize the AVFormatContext 334 structure. Return 0 if OK. 'ap' if non-NULL contains 335 additional parameters. Only used in raw format right 336 now. 'av_new_stream' should be called to create new streams. */ 337 int (*read_header)(struct AVFormatContext *, 338 AVFormatParameters *ap); 339 /** Read one packet and put it in 'pkt'. pts and flags are also 340 set. 'av_new_stream' can be called only if the flag 341 AVFMTCTX_NOHEADER is used. */ 342 int (*read_packet)(struct AVFormatContext *, AVPacket *pkt); 343 /** Close the stream. The AVFormatContext and AVStreams are not 344 freed by this function */ 345 int (*read_close)(struct AVFormatContext *); 346 347#if LIBAVFORMAT_VERSION_MAJOR < 53 348 /** 349 * Seek to a given timestamp relative to the frames in 350 * stream component stream_index. 351 * @param stream_index Must not be -1. 352 * @param flags Selects which direction should be preferred if no exact 353 * match is available. 354 * @return >= 0 on success (but not necessarily the new offset) 355 */ 356 int (*read_seek)(struct AVFormatContext *, 357 int stream_index, int64_t timestamp, int flags); 358#endif 359 /** 360 * Gets the next timestamp in stream[stream_index].time_base units. 361 * @return the timestamp or AV_NOPTS_VALUE if an error occurred 362 */ 363 int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index, 364 int64_t *pos, int64_t pos_limit); 365 /** Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER. */ 366 int flags; 367 /** If extensions are defined, then no probe is done. You should 368 usually not use extension format guessing because it is not 369 reliable enough */ 370 const char *extensions; 371 /** General purpose read-only value that the format can use. */ 372 int value; 373 374 /** Start/resume playing - only meaningful if using a network-based format 375 (RTSP). */ 376 int (*read_play)(struct AVFormatContext *); 377 378 /** Pause playing - only meaningful if using a network-based format 379 (RTSP). */ 380 int (*read_pause)(struct AVFormatContext *); 381 382 const struct AVCodecTag * const *codec_tag; 383 384 /** 385 * Seek to timestamp ts. 386 * Seeking will be done so that the point from which all active streams 387 * can be presented successfully will be closest to ts and within min/max_ts. 388 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. 389 */ 390 int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags); 391 392 const AVMetadataConv *metadata_conv; 393 394 /* private fields */ 395 struct AVInputFormat *next; 396} AVInputFormat; 397 398enum AVStreamParseType { 399 AVSTREAM_PARSE_NONE, 400 AVSTREAM_PARSE_FULL, /**< full parsing and repack */ 401 AVSTREAM_PARSE_HEADERS, /**< Only parse headers, do not repack. */ 402 AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */ 403}; 404 405typedef struct AVIndexEntry { 406 int64_t pos; 407 int64_t timestamp; 408#define AVINDEX_KEYFRAME 0x0001 409 int flags:2; 410 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). 411 int min_distance; /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */ 412} AVIndexEntry; 413 414#define AV_DISPOSITION_DEFAULT 0x0001 415#define AV_DISPOSITION_DUB 0x0002 416#define AV_DISPOSITION_ORIGINAL 0x0004 417#define AV_DISPOSITION_COMMENT 0x0008 418#define AV_DISPOSITION_LYRICS 0x0010 419#define AV_DISPOSITION_KARAOKE 0x0020 420 421/** 422 * Stream structure. 423 * New fields can be added to the end with minor version bumps. 424 * Removal, reordering and changes to existing fields require a major 425 * version bump. 426 * sizeof(AVStream) must not be used outside libav*. 427 */ 428typedef struct AVStream { 429 int index; /**< stream index in AVFormatContext */ 430 int id; /**< format-specific stream ID */ 431 AVCodecContext *codec; /**< codec context */ 432 /** 433 * Real base framerate of the stream. 434 * This is the lowest framerate with which all timestamps can be 435 * represented accurately (it is the least common multiple of all 436 * framerates in the stream). Note, this value is just a guess! 437 * For example, if the time base is 1/90000 and all frames have either 438 * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1. 439 */ 440 AVRational r_frame_rate; 441 void *priv_data; 442 443 /* internal data used in av_find_stream_info() */ 444 int64_t first_dts; 445 /** encoding: pts generation when outputting stream */ 446 struct AVFrac pts; 447 448 /** 449 * This is the fundamental unit of time (in seconds) in terms 450 * of which frame timestamps are represented. For fixed-fps content, 451 * time base should be 1/framerate and timestamp increments should be 1. 452 */ 453 AVRational time_base; 454 int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */ 455 /* ffmpeg.c private use */ 456 int stream_copy; /**< If set, just copy stream. */ 457 enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed. 458 //FIXME move stuff to a flags field? 459 /** Quality, as it has been removed from AVCodecContext and put in AVVideoFrame. 460 * MN: dunno if that is the right place for it */ 461 float quality; 462 /** 463 * Decoding: pts of the first frame of the stream, in stream time base. 464 * Only set this if you are absolutely 100% sure that the value you set 465 * it to really is the pts of the first frame. 466 * This may be undefined (AV_NOPTS_VALUE). 467 * @note The ASF header does NOT contain a correct start_time the ASF 468 * demuxer must NOT set this. 469 */ 470 int64_t start_time; 471 /** 472 * Decoding: duration of the stream, in stream time base. 473 * If a source file does not specify a duration, but does specify 474 * a bitrate, this value will be estimated from bitrate and file size. 475 */ 476 int64_t duration; 477 478#if LIBAVFORMAT_VERSION_INT < (53<<16) 479 char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */ 480#endif 481 482 /* av_read_frame() support */ 483 enum AVStreamParseType need_parsing; 484 struct AVCodecParserContext *parser; 485 486 int64_t cur_dts; 487 int last_IP_duration; 488 int64_t last_IP_pts; 489 /* av_seek_frame() support */ 490 AVIndexEntry *index_entries; /**< Only used if the format does not 491 support seeking natively. */ 492 int nb_index_entries; 493 unsigned int index_entries_allocated_size; 494 495 int64_t nb_frames; ///< number of frames in this stream if known or 0 496 497#if LIBAVFORMAT_VERSION_INT < (53<<16) 498 int64_t unused[4+1]; 499 500 char *filename; /**< source filename of the stream */ 501#endif 502 503 int disposition; /**< AV_DISPOSITION_* bit field */ 504 505 AVProbeData probe_data; 506#define MAX_REORDER_DELAY 16 507 int64_t pts_buffer[MAX_REORDER_DELAY+1]; 508 509 /** 510 * sample aspect ratio (0 if unknown) 511 * - encoding: Set by user. 512 * - decoding: Set by libavformat. 513 */ 514 AVRational sample_aspect_ratio; 515 516 AVMetadata *metadata; 517 518 /* av_read_frame() support */ 519 const uint8_t *cur_ptr; 520 int cur_len; 521 AVPacket cur_pkt; 522 523 // Timestamp generation support: 524 /** 525 * Timestamp corresponding to the last dts sync point. 526 * 527 * Initialized when AVCodecParserContext.dts_sync_point >= 0 and 528 * a DTS is received from the underlying container. Otherwise set to 529 * AV_NOPTS_VALUE by default. 530 */ 531 int64_t reference_dts; 532} AVStream; 533 534#define AV_PROGRAM_RUNNING 1 535 536/** 537 * New fields can be added to the end with minor version bumps. 538 * Removal, reordering and changes to existing fields require a major 539 * version bump. 540 * sizeof(AVProgram) must not be used outside libav*. 541 */ 542typedef struct AVProgram { 543 int id; 544#if LIBAVFORMAT_VERSION_INT < (53<<16) 545 char *provider_name; ///< network name for DVB streams 546 char *name; ///< service name for DVB streams 547#endif 548 int flags; 549 enum AVDiscard discard; ///< selects which program to discard and which to feed to the caller 550 unsigned int *stream_index; 551 unsigned int nb_stream_indexes; 552 AVMetadata *metadata; 553} AVProgram; 554 555#define AVFMTCTX_NOHEADER 0x0001 /**< signal that no header is present 556 (streams are added dynamically) */ 557 558typedef struct AVChapter { 559 int id; ///< unique ID to identify the chapter 560 AVRational time_base; ///< time base in which the start/end timestamps are specified 561 int64_t start, end; ///< chapter start/end time in time_base units 562#if LIBAVFORMAT_VERSION_INT < (53<<16) 563 char *title; ///< chapter title 564#endif 565 AVMetadata *metadata; 566} AVChapter; 567 568#define MAX_STREAMS 20 569 570/** 571 * Format I/O context. 572 * New fields can be added to the end with minor version bumps. 573 * Removal, reordering and changes to existing fields require a major 574 * version bump. 575 * sizeof(AVFormatContext) must not be used outside libav*. 576 */ 577typedef struct AVFormatContext { 578 const AVClass *av_class; /**< Set by avformat_alloc_context. */ 579 /* Can only be iformat or oformat, not both at the same time. */ 580 struct AVInputFormat *iformat; 581 struct AVOutputFormat *oformat; 582 void *priv_data; 583 ByteIOContext *pb; 584 unsigned int nb_streams; 585 AVStream *streams[MAX_STREAMS]; 586 char filename[1024]; /**< input or output filename */ 587 /* stream info */ 588 int64_t timestamp; 589#if LIBAVFORMAT_VERSION_INT < (53<<16) 590 char title[512]; 591 char author[512]; 592 char copyright[512]; 593 char comment[512]; 594 char album[512]; 595 int year; /**< ID3 year, 0 if none */ 596 int track; /**< track number, 0 if none */ 597 char genre[32]; /**< ID3 genre */ 598#endif 599 600 int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */ 601 /* private data for pts handling (do not modify directly). */ 602 /** This buffer is only needed when packets were already buffered but 603 not decoded, for example to get the codec parameters in MPEG 604 streams. */ 605 struct AVPacketList *packet_buffer; 606 607 /** Decoding: position of the first frame of the component, in 608 AV_TIME_BASE fractional seconds. NEVER set this value directly: 609 It is deduced from the AVStream values. */ 610 int64_t start_time; 611 /** Decoding: duration of the stream, in AV_TIME_BASE fractional 612 seconds. NEVER set this value directly: it is deduced from the 613 AVStream values. */ 614 int64_t duration; 615 /** decoding: total file size, 0 if unknown */ 616 int64_t file_size; 617 /** Decoding: total stream bitrate in bit/s, 0 if not 618 available. Never set it directly if the file_size and the 619 duration are known as FFmpeg can compute it automatically. */ 620 int bit_rate; 621 622 /* av_read_frame() support */ 623 AVStream *cur_st; 624#if LIBAVFORMAT_VERSION_INT < (53<<16) 625 const uint8_t *cur_ptr_deprecated; 626 int cur_len_deprecated; 627 AVPacket cur_pkt_deprecated; 628#endif 629 630 /* av_seek_frame() support */ 631 int64_t data_offset; /** offset of the first packet */ 632 int index_built; 633 634 int mux_rate; 635 int packet_size; 636 int preload; 637 int max_delay; 638 639#define AVFMT_NOOUTPUTLOOP -1 640#define AVFMT_INFINITEOUTPUTLOOP 0 641 /** number of times to loop output in formats that support it */ 642 int loop_output; 643 644 int flags; 645#define AVFMT_FLAG_GENPTS 0x0001 ///< Generate missing pts even if it requires parsing future frames. 646#define AVFMT_FLAG_IGNIDX 0x0002 ///< Ignore index. 647#define AVFMT_FLAG_NONBLOCK 0x0004 ///< Do not block when reading packets from input. 648 649 int loop_input; 650 /** decoding: size of data to probe; encoding: unused. */ 651 unsigned int probesize; 652 653 /** 654 * Maximum time (in AV_TIME_BASE units) during which the input should 655 * be analyzed in av_find_stream_info(). 656 */ 657 int max_analyze_duration; 658 659 const uint8_t *key; 660 int keylen; 661 662 unsigned int nb_programs; 663 AVProgram **programs; 664 665 /** 666 * Forced video codec_id. 667 * Demuxing: Set by user. 668 */ 669 enum CodecID video_codec_id; 670 /** 671 * Forced audio codec_id. 672 * Demuxing: Set by user. 673 */ 674 enum CodecID audio_codec_id; 675 /** 676 * Forced subtitle codec_id. 677 * Demuxing: Set by user. 678 */ 679 enum CodecID subtitle_codec_id; 680 681 /** 682 * Maximum amount of memory in bytes to use for the index of each stream. 683 * If the index exceeds this size, entries will be discarded as 684 * needed to maintain a smaller size. This can lead to slower or less 685 * accurate seeking (depends on demuxer). 686 * Demuxers for which a full in-memory index is mandatory will ignore 687 * this. 688 * muxing : unused 689 * demuxing: set by user 690 */ 691 unsigned int max_index_size; 692 693 /** 694 * Maximum amount of memory in bytes to use for buffering frames 695 * obtained from realtime capture devices. 696 */ 697 unsigned int max_picture_buffer; 698 699 unsigned int nb_chapters; 700 AVChapter **chapters; 701 702 /** 703 * Flags to enable debugging. 704 */ 705 int debug; 706#define FF_FDEBUG_TS 0x0001 707 708 /** 709 * Raw packets from the demuxer, prior to parsing and decoding. 710 * This buffer is used for buffering packets until the codec can 711 * be identified, as parsing cannot be done without knowing the 712 * codec. 713 */ 714 struct AVPacketList *raw_packet_buffer; 715 struct AVPacketList *raw_packet_buffer_end; 716 717 struct AVPacketList *packet_buffer_end; 718 719 AVMetadata *metadata; 720} AVFormatContext; 721 722typedef struct AVPacketList { 723 AVPacket pkt; 724 struct AVPacketList *next; 725} AVPacketList; 726 727#if LIBAVFORMAT_VERSION_INT < (53<<16) 728extern AVInputFormat *first_iformat; 729extern AVOutputFormat *first_oformat; 730#endif 731 732/** 733 * If f is NULL, returns the first registered input format, 734 * if f is non-NULL, returns the next registered input format after f 735 * or NULL if f is the last one. 736 */ 737AVInputFormat *av_iformat_next(AVInputFormat *f); 738 739/** 740 * If f is NULL, returns the first registered output format, 741 * if f is non-NULL, returns the next registered output format after f 742 * or NULL if f is the last one. 743 */ 744AVOutputFormat *av_oformat_next(AVOutputFormat *f); 745 746enum CodecID av_guess_image2_codec(const char *filename); 747 748/* XXX: Use automatic init with either ELF sections or C file parser */ 749/* modules. */ 750 751/* utils.c */ 752void av_register_input_format(AVInputFormat *format); 753void av_register_output_format(AVOutputFormat *format); 754AVOutputFormat *guess_stream_format(const char *short_name, 755 const char *filename, 756 const char *mime_type); 757AVOutputFormat *guess_format(const char *short_name, 758 const char *filename, 759 const char *mime_type); 760 761/** 762 * Guesses the codec ID based upon muxer and filename. 763 */ 764enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, 765 const char *filename, const char *mime_type, 766 enum CodecType type); 767 768/** 769 * Send a nice hexadecimal dump of a buffer to the specified file stream. 770 * 771 * @param f The file stream pointer where the dump should be sent to. 772 * @param buf buffer 773 * @param size buffer size 774 * 775 * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log 776 */ 777void av_hex_dump(FILE *f, uint8_t *buf, int size); 778 779/** 780 * Send a nice hexadecimal dump of a buffer to the log. 781 * 782 * @param avcl A pointer to an arbitrary struct of which the first field is a 783 * pointer to an AVClass struct. 784 * @param level The importance level of the message, lower values signifying 785 * higher importance. 786 * @param buf buffer 787 * @param size buffer size 788 * 789 * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log 790 */ 791void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size); 792 793/** 794 * Send a nice dump of a packet to the specified file stream. 795 * 796 * @param f The file stream pointer where the dump should be sent to. 797 * @param pkt packet to dump 798 * @param dump_payload True if the payload must be displayed, too. 799 */ 800void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload); 801 802/** 803 * Send a nice dump of a packet to the log. 804 * 805 * @param avcl A pointer to an arbitrary struct of which the first field is a 806 * pointer to an AVClass struct. 807 * @param level The importance level of the message, lower values signifying 808 * higher importance. 809 * @param pkt packet to dump 810 * @param dump_payload True if the payload must be displayed, too. 811 */ 812void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload); 813 814/** 815 * Initialize libavformat and register all the muxers, demuxers and 816 * protocols. If you do not call this function, then you can select 817 * exactly which formats you want to support. 818 * 819 * @see av_register_input_format() 820 * @see av_register_output_format() 821 * @see av_register_protocol() 822 */ 823void av_register_all(void); 824 825/** codec tag <-> codec id */ 826enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag); 827unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id); 828 829/* media file input */ 830 831/** 832 * Finds AVInputFormat based on the short name of the input format. 833 */ 834AVInputFormat *av_find_input_format(const char *short_name); 835 836/** 837 * Guess file format. 838 * 839 * @param is_opened Whether the file is already opened; determines whether 840 * demuxers with or without AVFMT_NOFILE are probed. 841 */ 842AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened); 843 844/** 845 * Allocates all the structures needed to read an input stream. 846 * This does not open the needed codecs for decoding the stream[s]. 847 */ 848int av_open_input_stream(AVFormatContext **ic_ptr, 849 ByteIOContext *pb, const char *filename, 850 AVInputFormat *fmt, AVFormatParameters *ap); 851 852/** 853 * Open a media file as input. The codecs are not opened. Only the file 854 * header (if present) is read. 855 * 856 * @param ic_ptr The opened media file handle is put here. 857 * @param filename filename to open 858 * @param fmt If non-NULL, force the file format to use. 859 * @param buf_size optional buffer size (zero if default is OK) 860 * @param ap Additional parameters needed when opening the file 861 * (NULL if default). 862 * @return 0 if OK, AVERROR_xxx otherwise 863 */ 864int av_open_input_file(AVFormatContext **ic_ptr, const char *filename, 865 AVInputFormat *fmt, 866 int buf_size, 867 AVFormatParameters *ap); 868 869#if LIBAVFORMAT_VERSION_MAJOR < 53 870/** 871 * @deprecated Use avformat_alloc_context() instead. 872 */ 873attribute_deprecated AVFormatContext *av_alloc_format_context(void); 874#endif 875 876/** 877 * Allocate an AVFormatContext. 878 * Can be freed with av_free() but do not forget to free everything you 879 * explicitly allocated as well! 880 */ 881AVFormatContext *avformat_alloc_context(void); 882 883/** 884 * Read packets of a media file to get stream information. This 885 * is useful for file formats with no headers such as MPEG. This 886 * function also computes the real framerate in case of MPEG-2 repeat 887 * frame mode. 888 * The logical file position is not changed by this function; 889 * examined packets may be buffered for later processing. 890 * 891 * @param ic media file handle 892 * @return >=0 if OK, AVERROR_xxx on error 893 * @todo Let the user decide somehow what information is needed so that 894 * we do not waste time getting stuff the user does not need. 895 */ 896int av_find_stream_info(AVFormatContext *ic); 897 898/** 899 * Read a transport packet from a media file. 900 * 901 * This function is obsolete and should never be used. 902 * Use av_read_frame() instead. 903 * 904 * @param s media file handle 905 * @param pkt is filled 906 * @return 0 if OK, AVERROR_xxx on error 907 */ 908int av_read_packet(AVFormatContext *s, AVPacket *pkt); 909 910/** 911 * Return the next frame of a stream. 912 * 913 * The returned packet is valid 914 * until the next av_read_frame() or until av_close_input_file() and 915 * must be freed with av_free_packet. For video, the packet contains 916 * exactly one frame. For audio, it contains an integer number of 917 * frames if each frame has a known fixed size (e.g. PCM or ADPCM 918 * data). If the audio frames have a variable size (e.g. MPEG audio), 919 * then it contains one frame. 920 * 921 * pkt->pts, pkt->dts and pkt->duration are always set to correct 922 * values in AVStream.time_base units (and guessed if the format cannot 923 * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format 924 * has B-frames, so it is better to rely on pkt->dts if you do not 925 * decompress the payload. 926 * 927 * @return 0 if OK, < 0 on error or end of file 928 */ 929int av_read_frame(AVFormatContext *s, AVPacket *pkt); 930 931/** 932 * Seek to the keyframe at timestamp. 933 * 'timestamp' in 'stream_index'. 934 * @param stream_index If stream_index is (-1), a default 935 * stream is selected, and timestamp is automatically converted 936 * from AV_TIME_BASE units to the stream specific time_base. 937 * @param timestamp Timestamp in AVStream.time_base units 938 * or, if no stream is specified, in AV_TIME_BASE units. 939 * @param flags flags which select direction and seeking mode 940 * @return >= 0 on success 941 */ 942int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, 943 int flags); 944 945/** 946 * Seek to timestamp ts. 947 * Seeking will be done so that the point from which all active streams 948 * can be presented successfully will be closest to ts and within min/max_ts. 949 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL. 950 * 951 * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and 952 * are the file position (this may not be supported by all demuxers). 953 * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames 954 * in the stream with stream_index (this may not be supported by all demuxers). 955 * Otherwise all timestamps are in units of the stream selected by stream_index 956 * or if stream_index is -1, in AV_TIME_BASE units. 957 * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as 958 * keyframes (this may not be supported by all demuxers). 959 * 960 * @param stream_index index of the stream which is used as time base reference 961 * @param min_ts smallest acceptable timestamp 962 * @param ts target timestamp 963 * @param max_ts largest acceptable timestamp 964 * @param flags flags 965 * @returns >=0 on success, error code otherwise 966 * 967 * @NOTE This is part of the new seek API which is still under construction. 968 * Thus do not use this yet. It may change at any time, do not expect 969 * ABI compatibility yet! 970 */ 971int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags); 972 973/** 974 * Start playing a network-based stream (e.g. RTSP stream) at the 975 * current position. 976 */ 977int av_read_play(AVFormatContext *s); 978 979/** 980 * Pause a network-based stream (e.g. RTSP stream). 981 * 982 * Use av_read_play() to resume it. 983 */ 984int av_read_pause(AVFormatContext *s); 985 986/** 987 * Free a AVFormatContext allocated by av_open_input_stream. 988 * @param s context to free 989 */ 990void av_close_input_stream(AVFormatContext *s); 991 992/** 993 * Close a media file (but not its codecs). 994 * 995 * @param s media file handle 996 */ 997void av_close_input_file(AVFormatContext *s); 998 999/** 1000 * Add a new stream to a media file. 1001 * 1002 * Can only be called in the read_header() function. If the flag 1003 * AVFMTCTX_NOHEADER is in the format context, then new streams 1004 * can be added in read_packet too. 1005 * 1006 * @param s media file handle 1007 * @param id file-format-dependent stream ID 1008 */ 1009AVStream *av_new_stream(AVFormatContext *s, int id); 1010AVProgram *av_new_program(AVFormatContext *s, int id); 1011 1012/** 1013 * Add a new chapter. 1014 * This function is NOT part of the public API 1015 * and should ONLY be used by demuxers. 1016 * 1017 * @param s media file handle 1018 * @param id unique ID for this chapter 1019 * @param start chapter start time in time_base units 1020 * @param end chapter end time in time_base units 1021 * @param title chapter title 1022 * 1023 * @return AVChapter or NULL on error 1024 */ 1025AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base, 1026 int64_t start, int64_t end, const char *title); 1027 1028/** 1029 * Set the pts for a given stream. 1030 * 1031 * @param s stream 1032 * @param pts_wrap_bits number of bits effectively used by the pts 1033 * (used for wrap control, 33 is the value for MPEG) 1034 * @param pts_num numerator to convert to seconds (MPEG: 1) 1035 * @param pts_den denominator to convert to seconds (MPEG: 90000) 1036 */ 1037void av_set_pts_info(AVStream *s, int pts_wrap_bits, 1038 unsigned int pts_num, unsigned int pts_den); 1039 1040#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward 1041#define AVSEEK_FLAG_BYTE 2 ///< seeking based on position in bytes 1042#define AVSEEK_FLAG_ANY 4 ///< seek to any frame, even non-keyframes 1043 1044int av_find_default_stream_index(AVFormatContext *s); 1045 1046/** 1047 * Gets the index for a specific timestamp. 1048 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond 1049 * to the timestamp which is <= the requested one, if backward 1050 * is 0, then it will be >= 1051 * if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise 1052 * @return < 0 if no such timestamp could be found 1053 */ 1054int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags); 1055 1056/** 1057 * Ensures the index uses less memory than the maximum specified in 1058 * AVFormatContext.max_index_size by discarding entries if it grows 1059 * too large. 1060 * This function is not part of the public API and should only be called 1061 * by demuxers. 1062 */ 1063void ff_reduce_index(AVFormatContext *s, int stream_index); 1064 1065/** 1066 * Add an index entry into a sorted list. Update the entry if the list 1067 * already contains it. 1068 * 1069 * @param timestamp timestamp in the time base of the given stream 1070 */ 1071int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, 1072 int size, int distance, int flags); 1073 1074/** 1075 * Does a binary search using av_index_search_timestamp() and 1076 * AVCodec.read_timestamp(). 1077 * This is not supposed to be called directly by a user application, 1078 * but by demuxers. 1079 * @param target_ts target timestamp in the time base of the given stream 1080 * @param stream_index stream number 1081 */ 1082int av_seek_frame_binary(AVFormatContext *s, int stream_index, 1083 int64_t target_ts, int flags); 1084 1085/** 1086 * Updates cur_dts of all streams based on the given timestamp and AVStream. 1087 * 1088 * Stream ref_st unchanged, others set cur_dts in their native time base. 1089 * Only needed for timestamp wrapping or if (dts not set and pts!=dts). 1090 * @param timestamp new dts expressed in time_base of param ref_st 1091 * @param ref_st reference stream giving time_base of param timestamp 1092 */ 1093void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp); 1094 1095/** 1096 * Does a binary search using read_timestamp(). 1097 * This is not supposed to be called directly by a user application, 1098 * but by demuxers. 1099 * @param target_ts target timestamp in the time base of the given stream 1100 * @param stream_index stream number 1101 */ 1102int64_t av_gen_search(AVFormatContext *s, int stream_index, 1103 int64_t target_ts, int64_t pos_min, 1104 int64_t pos_max, int64_t pos_limit, 1105 int64_t ts_min, int64_t ts_max, 1106 int flags, int64_t *ts_ret, 1107 int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )); 1108 1109/** media file output */ 1110int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap); 1111 1112/** 1113 * Allocate the stream private data and write the stream header to an 1114 * output media file. 1115 * 1116 * @param s media file handle 1117 * @return 0 if OK, AVERROR_xxx on error 1118 */ 1119int av_write_header(AVFormatContext *s); 1120 1121/** 1122 * Write a packet to an output media file. 1123 * 1124 * The packet shall contain one audio or video frame. 1125 * The packet must be correctly interleaved according to the container 1126 * specification, if not then av_interleaved_write_frame must be used. 1127 * 1128 * @param s media file handle 1129 * @param pkt The packet, which contains the stream_index, buf/buf_size, 1130 dts/pts, ... 1131 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted 1132 */ 1133int av_write_frame(AVFormatContext *s, AVPacket *pkt); 1134 1135/** 1136 * Writes a packet to an output media file ensuring correct interleaving. 1137 * 1138 * The packet must contain one audio or video frame. 1139 * If the packets are already correctly interleaved, the application should 1140 * call av_write_frame() instead as it is slightly faster. It is also important 1141 * to keep in mind that completely non-interleaved input will need huge amounts 1142 * of memory to interleave with this, so it is preferable to interleave at the 1143 * demuxer level. 1144 * 1145 * @param s media file handle 1146 * @param pkt The packet, which contains the stream_index, buf/buf_size, 1147 dts/pts, ... 1148 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted 1149 */ 1150int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt); 1151 1152/** 1153 * Interleave a packet per dts in an output media file. 1154 * 1155 * Packets with pkt->destruct == av_destruct_packet will be freed inside this 1156 * function, so they cannot be used after it. Note that calling av_free_packet() 1157 * on them is still safe. 1158 * 1159 * @param s media file handle 1160 * @param out the interleaved packet will be output here 1161 * @param in the input packet 1162 * @param flush 1 if no further packets are available as input and all 1163 * remaining packets should be output 1164 * @return 1 if a packet was output, 0 if no packet could be output, 1165 * < 0 if an error occurred 1166 */ 1167int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out, 1168 AVPacket *pkt, int flush); 1169 1170/** 1171 * @brief Write the stream trailer to an output media file and 1172 * free the file private data. 1173 * 1174 * May only be called after a successful call to av_write_header. 1175 * 1176 * @param s media file handle 1177 * @return 0 if OK, AVERROR_xxx on error 1178 */ 1179int av_write_trailer(AVFormatContext *s); 1180 1181void dump_format(AVFormatContext *ic, 1182 int index, 1183 const char *url, 1184 int is_output); 1185 1186#if LIBAVFORMAT_VERSION_MAJOR < 53 1187/** 1188 * Parses width and height out of string str. 1189 * @deprecated Use av_parse_video_frame_size instead. 1190 */ 1191attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr, 1192 const char *str); 1193 1194/** 1195 * Converts framerate from a string to a fraction. 1196 * @deprecated Use av_parse_video_frame_rate instead. 1197 */ 1198attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base, 1199 const char *arg); 1200#endif 1201 1202/** 1203 * Parses \p datestr and returns a corresponding number of microseconds. 1204 * @param datestr String representing a date or a duration. 1205 * - If a date the syntax is: 1206 * @code 1207 * [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]} 1208 * @endcode 1209 * Time is local time unless Z is appended, in which case it is 1210 * interpreted as UTC. 1211 * If the year-month-day part is not specified it takes the current 1212 * year-month-day. 1213 * Returns the number of microseconds since 1st of January, 1970 up to 1214 * the time of the parsed date or INT64_MIN if \p datestr cannot be 1215 * successfully parsed. 1216 * - If a duration the syntax is: 1217 * @code 1218 * [-]HH[:MM[:SS[.m...]]] 1219 * [-]S+[.m...] 1220 * @endcode 1221 * Returns the number of microseconds contained in a time interval 1222 * with the specified duration or INT64_MIN if \p datestr cannot be 1223 * successfully parsed. 1224 * @param duration Flag which tells how to interpret \p datestr, if 1225 * not zero \p datestr is interpreted as a duration, otherwise as a 1226 * date. 1227 */ 1228int64_t parse_date(const char *datestr, int duration); 1229 1230/** Gets the current time in microseconds. */ 1231int64_t av_gettime(void); 1232 1233/* ffm-specific for ffserver */ 1234#define FFM_PACKET_SIZE 4096 1235int64_t ffm_read_write_index(int fd); 1236int ffm_write_write_index(int fd, int64_t pos); 1237void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size); 1238 1239/** 1240 * Attempts to find a specific tag in a URL. 1241 * 1242 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done. 1243 * Return 1 if found. 1244 */ 1245int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info); 1246 1247/** 1248 * Returns in 'buf' the path with '%d' replaced by a number. 1249 * 1250 * Also handles the '%0nd' format where 'n' is the total number 1251 * of digits and '%%'. 1252 * 1253 * @param buf destination buffer 1254 * @param buf_size destination buffer size 1255 * @param path numbered sequence string 1256 * @param number frame number 1257 * @return 0 if OK, -1 on format error 1258 */ 1259int av_get_frame_filename(char *buf, int buf_size, 1260 const char *path, int number); 1261 1262/** 1263 * Check whether filename actually is a numbered sequence generator. 1264 * 1265 * @param filename possible numbered sequence string 1266 * @return 1 if a valid numbered sequence string, 0 otherwise 1267 */ 1268int av_filename_number_test(const char *filename); 1269 1270/** 1271 * Generate an SDP for an RTP session. 1272 * 1273 * @param ac array of AVFormatContexts describing the RTP streams. If the 1274 * array is composed by only one context, such context can contain 1275 * multiple AVStreams (one AVStream per RTP stream). Otherwise, 1276 * all the contexts in the array (an AVCodecContext per RTP stream) 1277 * must contain only one AVStream. 1278 * @param n_files number of AVCodecContexts contained in ac 1279 * @param buff buffer where the SDP will be stored (must be allocated by 1280 * the caller) 1281 * @param size the size of the buffer 1282 * @return 0 if OK, AVERROR_xxx on error 1283 */ 1284int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size); 1285 1286#ifdef HAVE_AV_CONFIG_H 1287 1288void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem); 1289 1290#ifdef __GNUC__ 1291#define dynarray_add(tab, nb_ptr, elem)\ 1292do {\ 1293 __typeof__(tab) _tab = (tab);\ 1294 __typeof__(elem) _elem = (elem);\ 1295 (void)sizeof(**_tab == _elem); /* check that types are compatible */\ 1296 ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\ 1297} while(0) 1298#else 1299#define dynarray_add(tab, nb_ptr, elem)\ 1300do {\ 1301 ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\ 1302} while(0) 1303#endif 1304 1305time_t mktimegm(struct tm *tm); 1306struct tm *brktimegm(time_t secs, struct tm *tm); 1307const char *small_strptime(const char *p, const char *fmt, 1308 struct tm *dt); 1309 1310struct in_addr; 1311int resolve_host(struct in_addr *sin_addr, const char *hostname); 1312 1313void url_split(char *proto, int proto_size, 1314 char *authorization, int authorization_size, 1315 char *hostname, int hostname_size, 1316 int *port_ptr, 1317 char *path, int path_size, 1318 const char *url); 1319 1320int match_ext(const char *filename, const char *extensions); 1321 1322#endif /* HAVE_AV_CONFIG_H */ 1323 1324#endif /* AVFORMAT_AVFORMAT_H */ 1325