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/*
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 * copyright (c) 2001 Fabrice Bellard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AVFORMAT_AVFORMAT_H
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#define AVFORMAT_AVFORMAT_H
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#define LIBAVFORMAT_VERSION_MAJOR 52
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#define LIBAVFORMAT_VERSION_MINOR 61
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#define LIBAVFORMAT_VERSION_MICRO  0
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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                                               LIBAVFORMAT_VERSION_MINOR, \
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                                               LIBAVFORMAT_VERSION_MICRO)
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#define LIBAVFORMAT_VERSION     AV_VERSION(LIBAVFORMAT_VERSION_MAJOR,   \
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                                           LIBAVFORMAT_VERSION_MINOR,   \
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                                           LIBAVFORMAT_VERSION_MICRO)
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#define LIBAVFORMAT_BUILD       LIBAVFORMAT_VERSION_INT
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#define LIBAVFORMAT_IDENT       "Lavf" AV_STRINGIFY(LIBAVFORMAT_VERSION)
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/**
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 * I return the LIBAVFORMAT_VERSION_INT constant.  You got
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 * a fucking problem with that, douchebag?
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 */
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unsigned avformat_version(void);
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/**
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 * Returns the libavformat build-time configuration.
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 */
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const char *avformat_configuration(void);
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/**
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 * Returns the libavformat license.
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 */
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const char *avformat_license(void);
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#include <time.h>
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#include <stdio.h>  /* FILE */
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#include "libavcodec/avcodec.h"
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#include "avio.h"
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struct AVFormatContext;
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/*
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 * Public Metadata API.
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 * The metadata API allows libavformat to export metadata tags to a client
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 * application using a sequence of key/value pairs. Like all strings in FFmpeg,
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 * metadata must be stored as UTF-8 encoded Unicode. Note that metadata
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 * exported by demuxers isn't checked to be valid UTF-8 in most cases.
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 * Important concepts to keep in mind:
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 * 1. Keys are unique; there can never be 2 tags with the same key. This is
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 *    also meant semantically, i.e., a demuxer should not knowingly produce
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 *    several keys that are literally different but semantically identical.
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 *    E.g., key=Author5, key=Author6. In this example, all authors must be
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 *    placed in the same tag.
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 * 2. Metadata is flat, not hierarchical; there are no subtags. If you
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 *    want to store, e.g., the email address of the child of producer Alice
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 *    and actor Bob, that could have key=alice_and_bobs_childs_email_address.
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 * 3. Several modifiers can be applied to the tag name. This is done by
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 *    appending a dash character ('-') and the modifier name in the order
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 *    they appear in the list below -- e.g. foo-eng-sort, not foo-sort-eng.
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 *    a) language -- a tag whose value is localized for a particular language
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 *       is appended with the ISO 639-2/B 3-letter language code.
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 *       For example: Author-ger=Michael, Author-eng=Mike
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 *       The original/default language is in the unqualified "Author" tag.
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 *       A demuxer should set a default if it sets any translated tag.
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 *    b) sorting  -- a modified version of a tag that should be used for
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 *       sorting will have '-sort' appended. E.g. artist="The Beatles",
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 *       artist-sort="Beatles, The".
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 *
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 * 4. Tag names are normally exported exactly as stored in the container to
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 *    allow lossless remuxing to the same format. For container-independent
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 *    handling of metadata, av_metadata_conv() can convert it to ffmpeg generic
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 *    format. Follows a list of generic tag names:
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 *
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 * album        -- name of the set this work belongs to
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 * album_artist -- main creator of the set/album, if different from artist.
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 *                 e.g. "Various Artists" for compilation albums.
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 * artist       -- main creator of the work
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 * comment      -- any additional description of the file.
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 * composer     -- who composed the work, if different from artist.
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 * copyright    -- name of copyright holder.
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 * date         -- date when the work was created, preferably in ISO 8601.
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 * disc         -- number of a subset, e.g. disc in a multi-disc collection.
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 * encoder      -- name/settings of the software/hardware that produced the file.
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 * encoded_by   -- person/group who created the file.
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 * filename     -- original name of the file.
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 * genre        -- <self-evident>.
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 * language     -- main language in which the work is performed, preferably
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 *                 in ISO 639-2 format.
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 * performer    -- artist who performed the work, if different from artist.
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 *                 E.g for "Also sprach Zarathustra", artist would be "Richard
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 *                 Strauss" and performer "London Philharmonic Orchestra".
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 * publisher    -- name of the label/publisher.
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 * title        -- name of the work.
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 * track        -- number of this work in the set, can be in form current/total.
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 */
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#define AV_METADATA_MATCH_CASE      1
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#define AV_METADATA_IGNORE_SUFFIX   2
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#define AV_METADATA_DONT_STRDUP_KEY 4
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#define AV_METADATA_DONT_STRDUP_VAL 8
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#define AV_METADATA_DONT_OVERWRITE 16   ///< Don't overwrite existing tags.
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typedef struct {
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    char *key;
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    char *value;
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}AVMetadataTag;
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typedef struct AVMetadata AVMetadata;
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typedef struct AVMetadataConv AVMetadataConv;
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/**
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 * Gets a metadata element with matching key.
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 * @param prev Set to the previous matching element to find the next.
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 *             If set to NULL the first matching element is returned.
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 * @param flags Allows case as well as suffix-insensitive comparisons.
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 * @return Found tag or NULL, changing key or value leads to undefined behavior.
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 */
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AVMetadataTag *
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av_metadata_get(AVMetadata *m, const char *key, const AVMetadataTag *prev, int flags);
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#if LIBAVFORMAT_VERSION_MAJOR == 52
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/**
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 * Sets the given tag in m, overwriting an existing tag.
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 * @param key tag key to add to m (will be av_strduped)
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 * @param value tag value to add to m (will be av_strduped)
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 * @return >= 0 on success otherwise an error code <0
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 */
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int av_metadata_set(AVMetadata **pm, const char *key, const char *value);
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#endif
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/**
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 * Sets the given tag in m, overwriting an existing tag.
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 * @param key tag key to add to m (will be av_strduped depending on flags)
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 * @param value tag value to add to m (will be av_strduped depending on flags)
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 * @return >= 0 on success otherwise an error code <0
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 */
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int av_metadata_set2(AVMetadata **pm, const char *key, const char *value, int flags);
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/**
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 * Converts all the metadata sets from ctx according to the source and
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 * destination conversion tables. If one of the tables is NULL, then
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 * tags are converted to/from ffmpeg generic tag names.
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 * @param d_conv destination tags format conversion table
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 * @param s_conv source tags format conversion table
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 */
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void av_metadata_conv(struct AVFormatContext *ctx,const AVMetadataConv *d_conv,
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                                                  const AVMetadataConv *s_conv);
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/**
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 * Frees all the memory allocated for an AVMetadata struct.
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 */
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void av_metadata_free(AVMetadata **m);
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/* packet functions */
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/**
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 * Allocates and reads the payload of a packet and initializes its
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 * fields with default values.
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 *
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 * @param pkt packet
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 * @param size desired payload size
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 * @return >0 (read size) if OK, AVERROR_xxx otherwise
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 */
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int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size);
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/*************************************************/
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/* fractional numbers for exact pts handling */
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/**
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 * The exact value of the fractional number is: 'val + num / den'.
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 * num is assumed to be 0 <= num < den.
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 */
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typedef struct AVFrac {
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    int64_t val, num, den;
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} AVFrac;
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/*************************************************/
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/* input/output formats */
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struct AVCodecTag;
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/** This structure contains the data a format has to probe a file. */
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typedef struct AVProbeData {
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    const char *filename;
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    unsigned char *buf; /**< Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero. */
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    int buf_size;       /**< Size of buf except extra allocated bytes */
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} AVProbeData;
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#define AVPROBE_SCORE_MAX 100               ///< maximum score, half of that is used for file-extension-based detection
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#define AVPROBE_PADDING_SIZE 32             ///< extra allocated bytes at the end of the probe buffer
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typedef struct AVFormatParameters {
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    AVRational time_base;
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    int sample_rate;
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    int channels;
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    int width;
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    int height;
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    enum PixelFormat pix_fmt;
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    int channel; /**< Used to select DV channel. */
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    const char *standard; /**< TV standard, NTSC, PAL, SECAM */
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    unsigned int mpeg2ts_raw:1;  /**< Force raw MPEG-2 transport stream output, if possible. */
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    unsigned int mpeg2ts_compute_pcr:1; /**< Compute exact PCR for each transport
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                                            stream packet (only meaningful if
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                                            mpeg2ts_raw is TRUE). */
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    unsigned int initial_pause:1;       /**< Do not begin to play the stream
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                                            immediately (RTSP only). */
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    unsigned int prealloced_context:1;
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
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    enum CodecID video_codec_id;
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    enum CodecID audio_codec_id;
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#endif
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} AVFormatParameters;
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//! Demuxer will use url_fopen, no opened file should be provided by the caller.
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#define AVFMT_NOFILE        0x0001
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#define AVFMT_NEEDNUMBER    0x0002 /**< Needs '%d' in filename. */
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#define AVFMT_SHOW_IDS      0x0008 /**< Show format stream IDs numbers. */
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#define AVFMT_RAWPICTURE    0x0020 /**< Format wants AVPicture structure for
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                                      raw picture data. */
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#define AVFMT_GLOBALHEADER  0x0040 /**< Format wants global header. */
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#define AVFMT_NOTIMESTAMPS  0x0080 /**< Format does not need / have any timestamps. */
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#define AVFMT_GENERIC_INDEX 0x0100 /**< Use generic index building code. */
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#define AVFMT_TS_DISCONT    0x0200 /**< Format allows timestamp discontinuities. */
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#define AVFMT_VARIABLE_FPS  0x0400 /**< Format allows variable fps. */
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#define AVFMT_NODIMENSIONS  0x0800 /**< Format does not need width/height */
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typedef struct AVOutputFormat {
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    const char *name;
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    /**
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     * Descriptive name for the format, meant to be more human-readable
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     * than name. You should use the NULL_IF_CONFIG_SMALL() macro
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     * to define it.
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     */
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    const char *long_name;
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    const char *mime_type;
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    const char *extensions; /**< comma-separated filename extensions */
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    /** size of private data so that it can be allocated in the wrapper */
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    int priv_data_size;
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    /* output support */
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    enum CodecID audio_codec; /**< default audio codec */
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    enum CodecID video_codec; /**< default video codec */
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    int (*write_header)(struct AVFormatContext *);
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    int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
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    int (*write_trailer)(struct AVFormatContext *);
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    /** can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER, AVFMT_GLOBALHEADER */
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    int flags;
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    /** Currently only used to set pixel format if not YUV420P. */
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    int (*set_parameters)(struct AVFormatContext *, AVFormatParameters *);
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    int (*interleave_packet)(struct AVFormatContext *, AVPacket *out,
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                             AVPacket *in, int flush);
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    /**
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     * List of supported codec_id-codec_tag pairs, ordered by "better
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     * choice first". The arrays are all terminated by CODEC_ID_NONE.
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     */
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    const struct AVCodecTag * const *codec_tag;
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    enum CodecID subtitle_codec; /**< default subtitle codec */
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    const AVMetadataConv *metadata_conv;
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    /* private fields */
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    struct AVOutputFormat *next;
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} AVOutputFormat;
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typedef struct AVInputFormat {
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    const char *name;
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    /**
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     * Descriptive name for the format, meant to be more human-readable
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     * than name. You should use the NULL_IF_CONFIG_SMALL() macro
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     * to define it.
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     */
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    const char *long_name;
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    /** Size of private data so that it can be allocated in the wrapper. */
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    int priv_data_size;
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    /**
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     * Tell if a given file has a chance of being parsed as this format.
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     * The buffer provided is guaranteed to be AVPROBE_PADDING_SIZE bytes
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     * big so you do not have to check for that unless you need more.
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     */
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    int (*read_probe)(AVProbeData *);
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    /** Read the format header and initialize the AVFormatContext
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       structure. Return 0 if OK. 'ap' if non-NULL contains
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       additional parameters. Only used in raw format right
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       now. 'av_new_stream' should be called to create new streams.  */
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    int (*read_header)(struct AVFormatContext *,
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                       AVFormatParameters *ap);
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    /** Read one packet and put it in 'pkt'. pts and flags are also
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       set. 'av_new_stream' can be called only if the flag
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       AVFMTCTX_NOHEADER is used.
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       @return 0 on success, < 0 on error.
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               When returning an error, pkt must not have been allocated
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               or must be freed before returning */
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    int (*read_packet)(struct AVFormatContext *, AVPacket *pkt);
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    /** Close the stream. The AVFormatContext and AVStreams are not
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       freed by this function */
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    int (*read_close)(struct AVFormatContext *);
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#if LIBAVFORMAT_VERSION_MAJOR < 53
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    /**
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     * Seek to a given timestamp relative to the frames in
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     * stream component stream_index.
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     * @param stream_index Must not be -1.
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     * @param flags Selects which direction should be preferred if no exact
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     *              match is available.
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     * @return >= 0 on success (but not necessarily the new offset)
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     */
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    int (*read_seek)(struct AVFormatContext *,
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                     int stream_index, int64_t timestamp, int flags);
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#endif
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    /**
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     * Gets the next timestamp in stream[stream_index].time_base units.
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     * @return the timestamp or AV_NOPTS_VALUE if an error occurred
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     */
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    int64_t (*read_timestamp)(struct AVFormatContext *s, int stream_index,
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                              int64_t *pos, int64_t pos_limit);
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    /** Can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER. */
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    int flags;
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    /** If extensions are defined, then no probe is done. You should
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       usually not use extension format guessing because it is not
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       reliable enough */
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    const char *extensions;
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    /** General purpose read-only value that the format can use. */
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    int value;
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    /** Starts/resumes playing - only meaningful if using a network-based format
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       (RTSP). */
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    int (*read_play)(struct AVFormatContext *);
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    /** Pauses playing - only meaningful if using a network-based format
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       (RTSP). */
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    int (*read_pause)(struct AVFormatContext *);
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    const struct AVCodecTag * const *codec_tag;
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    /**
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     * Seeks to timestamp ts.
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     * Seeking will be done so that the point from which all active streams
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     * can be presented successfully will be closest to ts and within min/max_ts.
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     * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
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     */
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    int (*read_seek2)(struct AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
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    const AVMetadataConv *metadata_conv;
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    /* private fields */
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    struct AVInputFormat *next;
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} AVInputFormat;
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enum AVStreamParseType {
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    AVSTREAM_PARSE_NONE,
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    AVSTREAM_PARSE_FULL,       /**< full parsing and repack */
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    AVSTREAM_PARSE_HEADERS,    /**< Only parse headers, do not repack. */
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    AVSTREAM_PARSE_TIMESTAMPS, /**< full parsing and interpolation of timestamps for frames not starting on a packet boundary */
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};
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typedef struct AVIndexEntry {
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    int64_t pos;
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    int64_t timestamp;
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#define AVINDEX_KEYFRAME 0x0001
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    int flags:2;
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    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).
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    int min_distance;         /**< Minimum distance between this and the previous keyframe, used to avoid unneeded searching. */
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} AVIndexEntry;
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#define AV_DISPOSITION_DEFAULT   0x0001
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#define AV_DISPOSITION_DUB       0x0002
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#define AV_DISPOSITION_ORIGINAL  0x0004
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#define AV_DISPOSITION_COMMENT   0x0008
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#define AV_DISPOSITION_LYRICS    0x0010
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#define AV_DISPOSITION_KARAOKE   0x0020
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/**
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 * Stream structure.
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 * New fields can be added to the end with minor version bumps.
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 * Removal, reordering and changes to existing fields require a major
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 * version bump.
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 * sizeof(AVStream) must not be used outside libav*.
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 */
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typedef struct AVStream {
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    int index;    /**< stream index in AVFormatContext */
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    int id;       /**< format-specific stream ID */
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    AVCodecContext *codec; /**< codec context */
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    /**
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     * Real base framerate of the stream.
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     * This is the lowest framerate with which all timestamps can be
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     * represented accurately (it is the least common multiple of all
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     * framerates in the stream). Note, this value is just a guess!
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     * For example, if the time base is 1/90000 and all frames have either
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     * approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.
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     */
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    AVRational r_frame_rate;
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    void *priv_data;
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    /* internal data used in av_find_stream_info() */
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    int64_t first_dts;
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    /** encoding: pts generation when outputting stream */
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    struct AVFrac pts;
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    /**
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     * This is the fundamental unit of time (in seconds) in terms
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     * of which frame timestamps are represented. For fixed-fps content,
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     * time base should be 1/framerate and timestamp increments should be 1.
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     */
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    AVRational time_base;
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    int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
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    /* ffmpeg.c private use */
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    int stream_copy; /**< If set, just copy stream. */
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    enum AVDiscard discard; ///< Selects which packets can be discarded at will and do not need to be demuxed.
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    //FIXME move stuff to a flags field?
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    /** Quality, as it has been removed from AVCodecContext and put in AVVideoFrame.
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     * MN: dunno if that is the right place for it */
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    float quality;
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    /**
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     * Decoding: pts of the first frame of the stream, in stream time base.
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     * Only set this if you are absolutely 100% sure that the value you set
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     * it to really is the pts of the first frame.
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     * This may be undefined (AV_NOPTS_VALUE).
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     * @note The ASF header does NOT contain a correct start_time the ASF
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     * demuxer must NOT set this.
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     */
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    int64_t start_time;
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    /**
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     * Decoding: duration of the stream, in stream time base.
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     * If a source file does not specify a duration, but does specify
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     * a bitrate, this value will be estimated from bitrate and file size.
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     */
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    int64_t duration;
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
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    char language[4]; /** ISO 639-2/B 3-letter language code (empty string if undefined) */
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#endif
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    /* av_read_frame() support */
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    enum AVStreamParseType need_parsing;
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    struct AVCodecParserContext *parser;
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    int64_t cur_dts;
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    int last_IP_duration;
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    int64_t last_IP_pts;
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    /* av_seek_frame() support */
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    AVIndexEntry *index_entries; /**< Only used if the format does not
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                                    support seeking natively. */
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    int nb_index_entries;
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    unsigned int index_entries_allocated_size;
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    int64_t nb_frames;                 ///< number of frames in this stream if known or 0
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
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    int64_t unused[4+1];
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476
    char *filename; /**< source filename of the stream */
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#endif
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    int disposition; /**< AV_DISPOSITION_* bit field */
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    AVProbeData probe_data;
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#define MAX_REORDER_DELAY 16
483
    int64_t pts_buffer[MAX_REORDER_DELAY+1];
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485
    /**
486
     * sample aspect ratio (0 if unknown)
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     * - encoding: Set by user.
488
     * - decoding: Set by libavformat.
489
     */
490
    AVRational sample_aspect_ratio;
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    AVMetadata *metadata;
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    /* av_read_frame() support */
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    const uint8_t *cur_ptr;
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    int cur_len;
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    AVPacket cur_pkt;
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    // Timestamp generation support:
500
    /**
501
     * Timestamp corresponding to the last dts sync point.
502
     *
503
     * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
504
     * a DTS is received from the underlying container. Otherwise set to
505
     * AV_NOPTS_VALUE by default.
506
     */
507
    int64_t reference_dts;
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    /**
510
     * Number of packets to buffer for codec probing
511
     * NOT PART OF PUBLIC API
512
     */
513
#define MAX_PROBE_PACKETS 2500
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    int probe_packets;
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    /**
517
     * last packet in packet_buffer for this stream when muxing.
518
     * used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav*
519
     */
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    struct AVPacketList *last_in_packet_buffer;
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    /**
523
     * Average framerate
524
     */
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    AVRational avg_frame_rate;
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527
    /**
528
     * Number of frames that have been demuxed during av_find_stream_info()
529
     */
530
    int codec_info_nb_frames;
531
} AVStream;
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#define AV_PROGRAM_RUNNING 1
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/**
536
 * New fields can be added to the end with minor version bumps.
537
 * Removal, reordering and changes to existing fields require a major
538
 * version bump.
539
 * sizeof(AVProgram) must not be used outside libav*.
540
 */
541
typedef struct AVProgram {
542
    int            id;
543
#if LIBAVFORMAT_VERSION_INT < (53<<16)
544
    char           *provider_name; ///< network name for DVB streams
545
    char           *name;          ///< service name for DVB streams
546
#endif
547
    int            flags;
548
    enum AVDiscard discard;        ///< selects which program to discard and which to feed to the caller
549
    unsigned int   *stream_index;
550
    unsigned int   nb_stream_indexes;
551
    AVMetadata *metadata;
552
} AVProgram;
553

    
554
#define AVFMTCTX_NOHEADER      0x0001 /**< signal that no header is present
555
                                         (streams are added dynamically) */
556

    
557
typedef struct AVChapter {
558
    int id;                 ///< unique ID to identify the chapter
559
    AVRational time_base;   ///< time base in which the start/end timestamps are specified
560
    int64_t start, end;     ///< chapter start/end time in time_base units
561
#if LIBAVFORMAT_VERSION_INT < (53<<16)
562
    char *title;            ///< chapter title
563
#endif
564
    AVMetadata *metadata;
565
} AVChapter;
566

    
567
#if LIBAVFORMAT_VERSION_MAJOR < 53
568
#define MAX_STREAMS 20
569
#else
570
#define MAX_STREAMS 100
571
#endif
572

    
573
/**
574
 * Format I/O context.
575
 * New fields can be added to the end with minor version bumps.
576
 * Removal, reordering and changes to existing fields require a major
577
 * version bump.
578
 * sizeof(AVFormatContext) must not be used outside libav*.
579
 */
580
typedef struct AVFormatContext {
581
    const AVClass *av_class; /**< Set by avformat_alloc_context. */
582
    /* Can only be iformat or oformat, not both at the same time. */
583
    struct AVInputFormat *iformat;
584
    struct AVOutputFormat *oformat;
585
    void *priv_data;
586
    ByteIOContext *pb;
587
    unsigned int nb_streams;
588
    AVStream *streams[MAX_STREAMS];
589
    char filename[1024]; /**< input or output filename */
590
    /* stream info */
591
    int64_t timestamp;
592
#if LIBAVFORMAT_VERSION_INT < (53<<16)
593
    char title[512];
594
    char author[512];
595
    char copyright[512];
596
    char comment[512];
597
    char album[512];
598
    int year;  /**< ID3 year, 0 if none */
599
    int track; /**< track number, 0 if none */
600
    char genre[32]; /**< ID3 genre */
601
#endif
602

    
603
    int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
604
    /* private data for pts handling (do not modify directly). */
605
    /** This buffer is only needed when packets were already buffered but
606
       not decoded, for example to get the codec parameters in MPEG
607
       streams. */
608
    struct AVPacketList *packet_buffer;
609

    
610
    /** Decoding: position of the first frame of the component, in
611
       AV_TIME_BASE fractional seconds. NEVER set this value directly:
612
       It is deduced from the AVStream values.  */
613
    int64_t start_time;
614
    /** Decoding: duration of the stream, in AV_TIME_BASE fractional
615
       seconds. Only set this value if you know none of the individual stream
616
       durations and also dont set any of them. This is deduced from the
617
       AVStream values if not set.  */
618
    int64_t duration;
619
    /** decoding: total file size, 0 if unknown */
620
    int64_t file_size;
621
    /** Decoding: total stream bitrate in bit/s, 0 if not
622
       available. Never set it directly if the file_size and the
623
       duration are known as FFmpeg can compute it automatically. */
624
    int bit_rate;
625

    
626
    /* av_read_frame() support */
627
    AVStream *cur_st;
628
#if LIBAVFORMAT_VERSION_INT < (53<<16)
629
    const uint8_t *cur_ptr_deprecated;
630
    int cur_len_deprecated;
631
    AVPacket cur_pkt_deprecated;
632
#endif
633

    
634
    /* av_seek_frame() support */
635
    int64_t data_offset; /** offset of the first packet */
636
    int index_built;
637

    
638
    int mux_rate;
639
    unsigned int packet_size;
640
    int preload;
641
    int max_delay;
642

    
643
#define AVFMT_NOOUTPUTLOOP -1
644
#define AVFMT_INFINITEOUTPUTLOOP 0
645
    /** number of times to loop output in formats that support it */
646
    int loop_output;
647

    
648
    int flags;
649
#define AVFMT_FLAG_GENPTS       0x0001 ///< Generate missing pts even if it requires parsing future frames.
650
#define AVFMT_FLAG_IGNIDX       0x0002 ///< Ignore index.
651
#define AVFMT_FLAG_NONBLOCK     0x0004 ///< Do not block when reading packets from input.
652
#define AVFMT_FLAG_IGNDTS       0x0008 ///< Ignore DTS on frames that contain both DTS & PTS
653
#define AVFMT_FLAG_NOFILLIN     0x0010 ///< Do not infer any values from other values, just return what is stored in the container
654
#define AVFMT_FLAG_NOPARSE      0x0020 ///< Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled
655

    
656
    int loop_input;
657
    /** decoding: size of data to probe; encoding: unused. */
658
    unsigned int probesize;
659

    
660
    /**
661
     * Maximum time (in AV_TIME_BASE units) during which the input should
662
     * be analyzed in av_find_stream_info().
663
     */
664
    int max_analyze_duration;
665

    
666
    const uint8_t *key;
667
    int keylen;
668

    
669
    unsigned int nb_programs;
670
    AVProgram **programs;
671

    
672
    /**
673
     * Forced video codec_id.
674
     * Demuxing: Set by user.
675
     */
676
    enum CodecID video_codec_id;
677
    /**
678
     * Forced audio codec_id.
679
     * Demuxing: Set by user.
680
     */
681
    enum CodecID audio_codec_id;
682
    /**
683
     * Forced subtitle codec_id.
684
     * Demuxing: Set by user.
685
     */
686
    enum CodecID subtitle_codec_id;
687

    
688
    /**
689
     * Maximum amount of memory in bytes to use for the index of each stream.
690
     * If the index exceeds this size, entries will be discarded as
691
     * needed to maintain a smaller size. This can lead to slower or less
692
     * accurate seeking (depends on demuxer).
693
     * Demuxers for which a full in-memory index is mandatory will ignore
694
     * this.
695
     * muxing  : unused
696
     * demuxing: set by user
697
     */
698
    unsigned int max_index_size;
699

    
700
    /**
701
     * Maximum amount of memory in bytes to use for buffering frames
702
     * obtained from realtime capture devices.
703
     */
704
    unsigned int max_picture_buffer;
705

    
706
    unsigned int nb_chapters;
707
    AVChapter **chapters;
708

    
709
    /**
710
     * Flags to enable debugging.
711
     */
712
    int debug;
713
#define FF_FDEBUG_TS        0x0001
714

    
715
    /**
716
     * Raw packets from the demuxer, prior to parsing and decoding.
717
     * This buffer is used for buffering packets until the codec can
718
     * be identified, as parsing cannot be done without knowing the
719
     * codec.
720
     */
721
    struct AVPacketList *raw_packet_buffer;
722
    struct AVPacketList *raw_packet_buffer_end;
723

    
724
    struct AVPacketList *packet_buffer_end;
725

    
726
    AVMetadata *metadata;
727

    
728
    /**
729
     * Remaining size available for raw_packet_buffer, in bytes.
730
     * NOT PART OF PUBLIC API
731
     */
732
#define RAW_PACKET_BUFFER_SIZE 2500000
733
    int raw_packet_buffer_remaining_size;
734

    
735
    /**
736
     * Start time of the stream in real world time, in microseconds
737
     * since the unix epoch (00:00 1st January 1970). That is, pts=0
738
     * in the stream was captured at this real world time.
739
     * - encoding: Set by user.
740
     * - decoding: Unused.
741
     */
742
    int64_t start_time_realtime;
743
} AVFormatContext;
744

    
745
typedef struct AVPacketList {
746
    AVPacket pkt;
747
    struct AVPacketList *next;
748
} AVPacketList;
749

    
750
#if LIBAVFORMAT_VERSION_INT < (53<<16)
751
extern AVInputFormat *first_iformat;
752
extern AVOutputFormat *first_oformat;
753
#endif
754

    
755
/**
756
 * If f is NULL, returns the first registered input format,
757
 * if f is non-NULL, returns the next registered input format after f
758
 * or NULL if f is the last one.
759
 */
760
AVInputFormat  *av_iformat_next(AVInputFormat  *f);
761

    
762
/**
763
 * If f is NULL, returns the first registered output format,
764
 * if f is non-NULL, returns the next registered output format after f
765
 * or NULL if f is the last one.
766
 */
767
AVOutputFormat *av_oformat_next(AVOutputFormat *f);
768

    
769
enum CodecID av_guess_image2_codec(const char *filename);
770

    
771
/* XXX: Use automatic init with either ELF sections or C file parser */
772
/* modules. */
773

    
774
/* utils.c */
775
void av_register_input_format(AVInputFormat *format);
776
void av_register_output_format(AVOutputFormat *format);
777
#if LIBAVFORMAT_VERSION_MAJOR < 53
778
attribute_deprecated AVOutputFormat *guess_stream_format(const char *short_name,
779
                                    const char *filename,
780
                                    const char *mime_type);
781

    
782
/**
783
 * @deprecated Use av_guess_format() instead.
784
 */
785
attribute_deprecated AVOutputFormat *guess_format(const char *short_name,
786
                                                  const char *filename,
787
                                                  const char *mime_type);
788
#endif
789

    
790
/**
791
 * Returns the output format in the list of registered output formats
792
 * which best matches the provided parameters, or returns NULL if
793
 * there is no match.
794
 *
795
 * @param short_name if non-NULL checks if short_name matches with the
796
 * names of the registered formats
797
 * @param filename if non-NULL checks if filename terminates with the
798
 * extensions of the registered formats
799
 * @param mime_type if non-NULL checks if mime_type matches with the
800
 * MIME type of the registered formats
801
 */
802
AVOutputFormat *av_guess_format(const char *short_name,
803
                                const char *filename,
804
                                const char *mime_type);
805

    
806
/**
807
 * Guesses the codec ID based upon muxer and filename.
808
 */
809
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
810
                            const char *filename, const char *mime_type,
811
                            enum AVMediaType type);
812

    
813
/**
814
 * Sends a nice hexadecimal dump of a buffer to the specified file stream.
815
 *
816
 * @param f The file stream pointer where the dump should be sent to.
817
 * @param buf buffer
818
 * @param size buffer size
819
 *
820
 * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
821
 */
822
void av_hex_dump(FILE *f, uint8_t *buf, int size);
823

    
824
/**
825
 * Sends a nice hexadecimal dump of a buffer to the log.
826
 *
827
 * @param avcl A pointer to an arbitrary struct of which the first field is a
828
 * pointer to an AVClass struct.
829
 * @param level The importance level of the message, lower values signifying
830
 * higher importance.
831
 * @param buf buffer
832
 * @param size buffer size
833
 *
834
 * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
835
 */
836
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
837

    
838
/**
839
 * Sends a nice dump of a packet to the specified file stream.
840
 *
841
 * @param f The file stream pointer where the dump should be sent to.
842
 * @param pkt packet to dump
843
 * @param dump_payload True if the payload must be displayed, too.
844
 */
845
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
846

    
847
/**
848
 * Sends a nice dump of a packet to the log.
849
 *
850
 * @param avcl A pointer to an arbitrary struct of which the first field is a
851
 * pointer to an AVClass struct.
852
 * @param level The importance level of the message, lower values signifying
853
 * higher importance.
854
 * @param pkt packet to dump
855
 * @param dump_payload True if the payload must be displayed, too.
856
 */
857
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
858

    
859
/**
860
 * Initializes libavformat and registers all the muxers, demuxers and
861
 * protocols. If you do not call this function, then you can select
862
 * exactly which formats you want to support.
863
 *
864
 * @see av_register_input_format()
865
 * @see av_register_output_format()
866
 * @see av_register_protocol()
867
 */
868
void av_register_all(void);
869

    
870
/** codec tag <-> codec id */
871
enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
872
unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id);
873

    
874
/* media file input */
875

    
876
/**
877
 * Finds AVInputFormat based on the short name of the input format.
878
 */
879
AVInputFormat *av_find_input_format(const char *short_name);
880

    
881
/**
882
 * Guesses the file format.
883
 *
884
 * @param is_opened Whether the file is already opened; determines whether
885
 *                  demuxers with or without AVFMT_NOFILE are probed.
886
 */
887
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
888

    
889
/**
890
 * Allocates all the structures needed to read an input stream.
891
 *        This does not open the needed codecs for decoding the stream[s].
892
 */
893
int av_open_input_stream(AVFormatContext **ic_ptr,
894
                         ByteIOContext *pb, const char *filename,
895
                         AVInputFormat *fmt, AVFormatParameters *ap);
896

    
897
/**
898
 * Opens a media file as input. The codecs are not opened. Only the file
899
 * header (if present) is read.
900
 *
901
 * @param ic_ptr The opened media file handle is put here.
902
 * @param filename filename to open
903
 * @param fmt If non-NULL, force the file format to use.
904
 * @param buf_size optional buffer size (zero if default is OK)
905
 * @param ap Additional parameters needed when opening the file
906
 *           (NULL if default).
907
 * @return 0 if OK, AVERROR_xxx otherwise
908
 */
909
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
910
                       AVInputFormat *fmt,
911
                       int buf_size,
912
                       AVFormatParameters *ap);
913

    
914
#if LIBAVFORMAT_VERSION_MAJOR < 53
915
/**
916
 * @deprecated Use avformat_alloc_context() instead.
917
 */
918
attribute_deprecated AVFormatContext *av_alloc_format_context(void);
919
#endif
920

    
921
/**
922
 * Allocates an AVFormatContext.
923
 * Can be freed with av_free() but do not forget to free everything you
924
 * explicitly allocated as well!
925
 */
926
AVFormatContext *avformat_alloc_context(void);
927

    
928
/**
929
 * Reads packets of a media file to get stream information. This
930
 * is useful for file formats with no headers such as MPEG. This
931
 * function also computes the real framerate in case of MPEG-2 repeat
932
 * frame mode.
933
 * The logical file position is not changed by this function;
934
 * examined packets may be buffered for later processing.
935
 *
936
 * @param ic media file handle
937
 * @return >=0 if OK, AVERROR_xxx on error
938
 * @todo Let the user decide somehow what information is needed so that
939
 *       we do not waste time getting stuff the user does not need.
940
 */
941
int av_find_stream_info(AVFormatContext *ic);
942

    
943
/**
944
 * Reads a transport packet from a media file.
945
 *
946
 * This function is obsolete and should never be used.
947
 * Use av_read_frame() instead.
948
 *
949
 * @param s media file handle
950
 * @param pkt is filled
951
 * @return 0 if OK, AVERROR_xxx on error
952
 */
953
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
954

    
955
/**
956
 * Returns the next frame of a stream.
957
 *
958
 * The returned packet is valid
959
 * until the next av_read_frame() or until av_close_input_file() and
960
 * must be freed with av_free_packet. For video, the packet contains
961
 * exactly one frame. For audio, it contains an integer number of
962
 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
963
 * data). If the audio frames have a variable size (e.g. MPEG audio),
964
 * then it contains one frame.
965
 *
966
 * pkt->pts, pkt->dts and pkt->duration are always set to correct
967
 * values in AVStream.time_base units (and guessed if the format cannot
968
 * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
969
 * has B-frames, so it is better to rely on pkt->dts if you do not
970
 * decompress the payload.
971
 *
972
 * @return 0 if OK, < 0 on error or end of file
973
 */
974
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
975

    
976
/**
977
 * Seeks to the keyframe at timestamp.
978
 * 'timestamp' in 'stream_index'.
979
 * @param stream_index If stream_index is (-1), a default
980
 * stream is selected, and timestamp is automatically converted
981
 * from AV_TIME_BASE units to the stream specific time_base.
982
 * @param timestamp Timestamp in AVStream.time_base units
983
 *        or, if no stream is specified, in AV_TIME_BASE units.
984
 * @param flags flags which select direction and seeking mode
985
 * @return >= 0 on success
986
 */
987
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
988
                  int flags);
989

    
990
/**
991
 * Seeks to timestamp ts.
992
 * Seeking will be done so that the point from which all active streams
993
 * can be presented successfully will be closest to ts and within min/max_ts.
994
 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
995
 *
996
 * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and
997
 * are the file position (this may not be supported by all demuxers).
998
 * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames
999
 * in the stream with stream_index (this may not be supported by all demuxers).
1000
 * Otherwise all timestamps are in units of the stream selected by stream_index
1001
 * or if stream_index is -1, in AV_TIME_BASE units.
1002
 * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as
1003
 * keyframes (this may not be supported by all demuxers).
1004
 *
1005
 * @param stream_index index of the stream which is used as time base reference
1006
 * @param min_ts smallest acceptable timestamp
1007
 * @param ts target timestamp
1008
 * @param max_ts largest acceptable timestamp
1009
 * @param flags flags
1010
 * @return >=0 on success, error code otherwise
1011
 *
1012
 * @NOTE This is part of the new seek API which is still under construction.
1013
 *       Thus do not use this yet. It may change at any time, do not expect
1014
 *       ABI compatibility yet!
1015
 */
1016
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
1017

    
1018
/**
1019
 * Starts playing a network-based stream (e.g. RTSP stream) at the
1020
 * current position.
1021
 */
1022
int av_read_play(AVFormatContext *s);
1023

    
1024
/**
1025
 * Pauses a network-based stream (e.g. RTSP stream).
1026
 *
1027
 * Use av_read_play() to resume it.
1028
 */
1029
int av_read_pause(AVFormatContext *s);
1030

    
1031
/**
1032
 * Frees a AVFormatContext allocated by av_open_input_stream.
1033
 * @param s context to free
1034
 */
1035
void av_close_input_stream(AVFormatContext *s);
1036

    
1037
/**
1038
 * Closes a media file (but not its codecs).
1039
 *
1040
 * @param s media file handle
1041
 */
1042
void av_close_input_file(AVFormatContext *s);
1043

    
1044
/**
1045
 * Adds a new stream to a media file.
1046
 *
1047
 * Can only be called in the read_header() function. If the flag
1048
 * AVFMTCTX_NOHEADER is in the format context, then new streams
1049
 * can be added in read_packet too.
1050
 *
1051
 * @param s media file handle
1052
 * @param id file-format-dependent stream ID
1053
 */
1054
AVStream *av_new_stream(AVFormatContext *s, int id);
1055
AVProgram *av_new_program(AVFormatContext *s, int id);
1056

    
1057
/**
1058
 * Adds a new chapter.
1059
 * This function is NOT part of the public API
1060
 * and should ONLY be used by demuxers.
1061
 *
1062
 * @param s media file handle
1063
 * @param id unique ID for this chapter
1064
 * @param start chapter start time in time_base units
1065
 * @param end chapter end time in time_base units
1066
 * @param title chapter title
1067
 *
1068
 * @return AVChapter or NULL on error
1069
 */
1070
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
1071
                          int64_t start, int64_t end, const char *title);
1072

    
1073
/**
1074
 * Sets the pts for a given stream.
1075
 *
1076
 * @param s stream
1077
 * @param pts_wrap_bits number of bits effectively used by the pts
1078
 *        (used for wrap control, 33 is the value for MPEG)
1079
 * @param pts_num numerator to convert to seconds (MPEG: 1)
1080
 * @param pts_den denominator to convert to seconds (MPEG: 90000)
1081
 */
1082
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
1083
                     unsigned int pts_num, unsigned int pts_den);
1084

    
1085
#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
1086
#define AVSEEK_FLAG_BYTE     2 ///< seeking based on position in bytes
1087
#define AVSEEK_FLAG_ANY      4 ///< seek to any frame, even non-keyframes
1088
#define AVSEEK_FLAG_FRAME    8 ///< seeking based on frame number
1089

    
1090
int av_find_default_stream_index(AVFormatContext *s);
1091

    
1092
/**
1093
 * Gets the index for a specific timestamp.
1094
 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
1095
 *                 to the timestamp which is <= the requested one, if backward
1096
 *                 is 0, then it will be >=
1097
 *              if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
1098
 * @return < 0 if no such timestamp could be found
1099
 */
1100
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
1101

    
1102
/**
1103
 * Ensures the index uses less memory than the maximum specified in
1104
 * AVFormatContext.max_index_size by discarding entries if it grows
1105
 * too large.
1106
 * This function is not part of the public API and should only be called
1107
 * by demuxers.
1108
 */
1109
void ff_reduce_index(AVFormatContext *s, int stream_index);
1110

    
1111
/**
1112
 * Adds an index entry into a sorted list. Updates the entry if the list
1113
 * already contains it.
1114
 *
1115
 * @param timestamp timestamp in the time base of the given stream
1116
 */
1117
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1118
                       int size, int distance, int flags);
1119

    
1120
/**
1121
 * Does a binary search using av_index_search_timestamp() and
1122
 * AVCodec.read_timestamp().
1123
 * This is not supposed to be called directly by a user application,
1124
 * but by demuxers.
1125
 * @param target_ts target timestamp in the time base of the given stream
1126
 * @param stream_index stream number
1127
 */
1128
int av_seek_frame_binary(AVFormatContext *s, int stream_index,
1129
                         int64_t target_ts, int flags);
1130

    
1131
/**
1132
 * Updates cur_dts of all streams based on the given timestamp and AVStream.
1133
 *
1134
 * Stream ref_st unchanged, others set cur_dts in their native time base.
1135
 * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
1136
 * @param timestamp new dts expressed in time_base of param ref_st
1137
 * @param ref_st reference stream giving time_base of param timestamp
1138
 */
1139
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
1140

    
1141
/**
1142
 * Does a binary search using read_timestamp().
1143
 * This is not supposed to be called directly by a user application,
1144
 * but by demuxers.
1145
 * @param target_ts target timestamp in the time base of the given stream
1146
 * @param stream_index stream number
1147
 */
1148
int64_t av_gen_search(AVFormatContext *s, int stream_index,
1149
                      int64_t target_ts, int64_t pos_min,
1150
                      int64_t pos_max, int64_t pos_limit,
1151
                      int64_t ts_min, int64_t ts_max,
1152
                      int flags, int64_t *ts_ret,
1153
                      int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
1154

    
1155
/** media file output */
1156
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
1157

    
1158
/**
1159
 * Allocates the stream private data and writes the stream header to an
1160
 * output media file.
1161
 *
1162
 * @param s media file handle
1163
 * @return 0 if OK, AVERROR_xxx on error
1164
 */
1165
int av_write_header(AVFormatContext *s);
1166

    
1167
/**
1168
 * Writes a packet to an output media file.
1169
 *
1170
 * The packet shall contain one audio or video frame.
1171
 * The packet must be correctly interleaved according to the container
1172
 * specification, if not then av_interleaved_write_frame must be used.
1173
 *
1174
 * @param s media file handle
1175
 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1176
              dts/pts, ...
1177
 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
1178
 */
1179
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
1180

    
1181
/**
1182
 * Writes a packet to an output media file ensuring correct interleaving.
1183
 *
1184
 * The packet must contain one audio or video frame.
1185
 * If the packets are already correctly interleaved, the application should
1186
 * call av_write_frame() instead as it is slightly faster. It is also important
1187
 * to keep in mind that completely non-interleaved input will need huge amounts
1188
 * of memory to interleave with this, so it is preferable to interleave at the
1189
 * demuxer level.
1190
 *
1191
 * @param s media file handle
1192
 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1193
              dts/pts, ...
1194
 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
1195
 */
1196
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
1197

    
1198
/**
1199
 * Interleaves a packet per dts in an output media file.
1200
 *
1201
 * Packets with pkt->destruct == av_destruct_packet will be freed inside this
1202
 * function, so they cannot be used after it. Note that calling av_free_packet()
1203
 * on them is still safe.
1204
 *
1205
 * @param s media file handle
1206
 * @param out the interleaved packet will be output here
1207
 * @param in the input packet
1208
 * @param flush 1 if no further packets are available as input and all
1209
 *              remaining packets should be output
1210
 * @return 1 if a packet was output, 0 if no packet could be output,
1211
 *         < 0 if an error occurred
1212
 */
1213
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1214
                                 AVPacket *pkt, int flush);
1215

    
1216
/**
1217
 * Writes the stream trailer to an output media file and frees the
1218
 * file private data.
1219
 *
1220
 * May only be called after a successful call to av_write_header.
1221
 *
1222
 * @param s media file handle
1223
 * @return 0 if OK, AVERROR_xxx on error
1224
 */
1225
int av_write_trailer(AVFormatContext *s);
1226

    
1227
void dump_format(AVFormatContext *ic,
1228
                 int index,
1229
                 const char *url,
1230
                 int is_output);
1231

    
1232
#if LIBAVFORMAT_VERSION_MAJOR < 53
1233
/**
1234
 * Parses width and height out of string str.
1235
 * @deprecated Use av_parse_video_frame_size instead.
1236
 */
1237
attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
1238
                                          const char *str);
1239

    
1240
/**
1241
 * Converts framerate from a string to a fraction.
1242
 * @deprecated Use av_parse_video_frame_rate instead.
1243
 */
1244
attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
1245
                                          const char *arg);
1246
#endif
1247

    
1248
/**
1249
 * Parses datestr and returns a corresponding number of microseconds.
1250
 * @param datestr String representing a date or a duration.
1251
 * - If a date the syntax is:
1252
 * @code
1253
 *  [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
1254
 * @endcode
1255
 * Time is local time unless Z is appended, in which case it is
1256
 * interpreted as UTC.
1257
 * If the year-month-day part is not specified it takes the current
1258
 * year-month-day.
1259
 * Returns the number of microseconds since 1st of January, 1970 up to
1260
 * the time of the parsed date or INT64_MIN if datestr cannot be
1261
 * successfully parsed.
1262
 * - If a duration the syntax is:
1263
 * @code
1264
 *  [-]HH[:MM[:SS[.m...]]]
1265
 *  [-]S+[.m...]
1266
 * @endcode
1267
 * Returns the number of microseconds contained in a time interval
1268
 * with the specified duration or INT64_MIN if datestr cannot be
1269
 * successfully parsed.
1270
 * @param duration Flag which tells how to interpret datestr, if
1271
 * not zero datestr is interpreted as a duration, otherwise as a
1272
 * date.
1273
 */
1274
int64_t parse_date(const char *datestr, int duration);
1275

    
1276
/** Gets the current time in microseconds. */
1277
int64_t av_gettime(void);
1278

    
1279
/* ffm-specific for ffserver */
1280
#define FFM_PACKET_SIZE 4096
1281
int64_t ffm_read_write_index(int fd);
1282
int ffm_write_write_index(int fd, int64_t pos);
1283
void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
1284

    
1285
/**
1286
 * Attempts to find a specific tag in a URL.
1287
 *
1288
 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
1289
 * Return 1 if found.
1290
 */
1291
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
1292

    
1293
/**
1294
 * Returns in 'buf' the path with '%d' replaced by a number.
1295
 *
1296
 * Also handles the '%0nd' format where 'n' is the total number
1297
 * of digits and '%%'.
1298
 *
1299
 * @param buf destination buffer
1300
 * @param buf_size destination buffer size
1301
 * @param path numbered sequence string
1302
 * @param number frame number
1303
 * @return 0 if OK, -1 on format error
1304
 */
1305
int av_get_frame_filename(char *buf, int buf_size,
1306
                          const char *path, int number);
1307

    
1308
/**
1309
 * Checks whether filename actually is a numbered sequence generator.
1310
 *
1311
 * @param filename possible numbered sequence string
1312
 * @return 1 if a valid numbered sequence string, 0 otherwise
1313
 */
1314
int av_filename_number_test(const char *filename);
1315

    
1316
/**
1317
 * Generates an SDP for an RTP session.
1318
 *
1319
 * @param ac array of AVFormatContexts describing the RTP streams. If the
1320
 *           array is composed by only one context, such context can contain
1321
 *           multiple AVStreams (one AVStream per RTP stream). Otherwise,
1322
 *           all the contexts in the array (an AVCodecContext per RTP stream)
1323
 *           must contain only one AVStream.
1324
 * @param n_files number of AVCodecContexts contained in ac
1325
 * @param buff buffer where the SDP will be stored (must be allocated by
1326
 *             the caller)
1327
 * @param size the size of the buffer
1328
 * @return 0 if OK, AVERROR_xxx on error
1329
 */
1330
int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
1331

    
1332
/**
1333
 * Returns a positive value if the given filename has one of the given
1334
 * extensions, 0 otherwise.
1335
 *
1336
 * @param extensions a comma-separated list of filename extensions
1337
 */
1338
int av_match_ext(const char *filename, const char *extensions);
1339

    
1340
#endif /* AVFORMAT_AVFORMAT_H */