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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 30
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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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 * Returns the LIBAVFORMAT_VERSION_INT constant.
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 */
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unsigned avformat_version(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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/*
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 * Public Metadata API.
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 * !!WARNING!! This is a work in progress. Don't use outside FFmpeg for now.
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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.
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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. A tag whose value is localized for a particular language is appended
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 *    with a dash character ('-') and the ISO 639 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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 */
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#define AV_METADATA_MATCH_CASE      1
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#define AV_METADATA_IGNORE_SUFFIX   2
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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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/**
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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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 * @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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/**
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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 if success otherwise error code that is <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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/**
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 * Free 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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typedef struct AVPacket {
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    /**
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     * Presentation timestamp in time_base units.
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     * This is the time at which the decompressed packet will be presented
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     * to the user.
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     * Can be AV_NOPTS_VALUE if it is not stored in the file.
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     * pts MUST be larger or equal to dts as presentation cannot happen before
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     * decompression, unless one wants to view hex dumps. Some formats misuse
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     * the terms dts and pts/cts to mean something different, these timestamps
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     * must be converted to true pts/dts before they are stored in AVPacket.
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     */
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    int64_t pts;
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    /**
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     * Decompression timestamp in time_base units.
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     * This is the time at which the packet is decompressed.
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     * Can be AV_NOPTS_VALUE if it is not stored in the file.
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     */
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    int64_t dts;
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    uint8_t *data;
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    int   size;
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    int   stream_index;
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    int   flags;
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    /**
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     * Duration of this packet in time_base units, 0 if unknown.
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     * Equals next_pts - this_pts in presentation order.
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     */
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    int   duration;
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    void  (*destruct)(struct AVPacket *);
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    void  *priv;
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    int64_t pos;                            ///< byte position in stream, -1 if unknown
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    /**
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     * Time difference in stream time base units from the pts of this
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     * packet to the point at which the output from the decoder has converged
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     * independent from the availability of previous frames. That is, the
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     * frames are virtually identical no matter if decoding started from
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     * the very first frame or from this keyframe.
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     * Is AV_NOPTS_VALUE if unknown.
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     * This field is not the display duration of the current packet.
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     *
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     * The purpose of this field is to allow seeking in streams that have no
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     * keyframes in the conventional sense. It corresponds to the
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     * recovery point SEI in H.264 and match_time_delta in NUT. It is also
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     * essential for some types of subtitle streams to ensure that all
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     * subtitles are correctly displayed after seeking.
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     */
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    int64_t convergence_duration;
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} AVPacket;
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#define PKT_FLAG_KEY   0x0001
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void av_destruct_packet_nofree(AVPacket *pkt);
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/**
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 * Default packet destructor.
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 */
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void av_destruct_packet(AVPacket *pkt);
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/**
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 * Initialize optional fields of a packet with default values.
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 *
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 * @param pkt packet
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 */
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void av_init_packet(AVPacket *pkt);
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/**
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 * Allocate the payload of a packet and initialize its fields with
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 * default values.
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 *
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 * @param pkt packet
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 * @param size wanted payload size
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 * @return 0 if OK, AVERROR_xxx otherwise
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 */
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int av_new_packet(AVPacket *pkt, int size);
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/**
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 * Allocate and read the payload of a packet and initialize its fields with
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 * 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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 * @warning This is a hack - the packet memory allocation stuff is broken. The
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 * packet is allocated if it was not really allocated.
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 */
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int av_dup_packet(AVPacket *pkt);
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/**
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 * Free a packet.
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 *
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 * @param pkt packet to free
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 */
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static inline void av_free_packet(AVPacket *pkt)
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{
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    if (pkt && pkt->destruct) {
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        pkt->destruct(pkt);
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    }
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}
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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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struct AVFormatContext;
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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;
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    int buf_size;
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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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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 \p name. You \e 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 CODEC_ID_NONE terminated.
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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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    /* 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 \p name. You \e 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 by 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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    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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    /**
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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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    /**
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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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    /** Start/resume 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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    /** Pause 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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    /* 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.
401
 * 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 {
406
    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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    /**
410
     * Real base frame rate of the stream.
411
     * This is the lowest frame rate with which all timestamps can be
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     * represented accurately (it is the least common multiple of all
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     * frame rates 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.
416
     */
417
    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 */
423
    struct AVFrac pts;
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    /**
426
     * This is the fundamental unit of time (in seconds) in terms
427
     * of which frame timestamps are represented. For fixed-fps content,
428
     * time base should be 1/frame rate and timestamp increments should be 1.
429
     */
430
    AVRational time_base;
431
    int pts_wrap_bits; /**< number of bits in pts (used for wrapping control) */
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    /* ffmpeg.c private use */
433
    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.
437
     * MN: dunno if that is the right place for it */
438
    float quality;
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    /**
440
     * Decoding: pts of the first frame of the stream, in stream time base.
441
     * Only set this if you are absolutely 100% sure that the value you set
442
     * it to really is the pts of the first frame.
443
     * This may be undefined (AV_NOPTS_VALUE).
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     * @note The ASF header does NOT contain a correct start_time the ASF
445
     * demuxer must NOT set this.
446
     */
447
    int64_t start_time;
448
    /**
449
     * Decoding: duration of the stream, in stream time base.
450
     * If a source file does not specify a duration, but does specify
451
     * a bitrate, this value will be estimated from bitrate and file size.
452
     */
453
    int64_t duration;
454

    
455
    char language[4]; /** ISO 639 3-letter language code (empty string if undefined) */
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457
    /* av_read_frame() support */
458
    enum AVStreamParseType need_parsing;
459
    struct AVCodecParserContext *parser;
460

    
461
    int64_t cur_dts;
462
    int last_IP_duration;
463
    int64_t last_IP_pts;
464
    /* av_seek_frame() support */
465
    AVIndexEntry *index_entries; /**< Only used if the format does not
466
                                    support seeking natively. */
467
    int nb_index_entries;
468
    unsigned int index_entries_allocated_size;
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470
    int64_t nb_frames;                 ///< number of frames in this stream if known or 0
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472
#if LIBAVFORMAT_VERSION_INT < (53<<16)
473
    int64_t unused[4+1];
474
#endif
475

    
476
    char *filename; /**< source filename of the stream */
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478
    int disposition; /**< AV_DISPOSITION_* bit field */
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480
    AVProbeData probe_data;
481
#define MAX_REORDER_DELAY 16
482
    int64_t pts_buffer[MAX_REORDER_DELAY+1];
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484
    /**
485
     * sample aspect ratio (0 if unknown)
486
     * - encoding: Set by user.
487
     * - decoding: Set by libavformat.
488
     */
489
    AVRational sample_aspect_ratio;
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    AVMetadata *metadata;
492

    
493
    /* av_read_frame() support */
494
    const uint8_t *cur_ptr;
495
    int cur_len;
496
    AVPacket cur_pkt;
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498
    // Timestamp generation support:
499
    /**
500
     * Timestamp corresponding to the last dts sync point.
501
     *
502
     * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
503
     * a DTS is received from the underlying container. Otherwise set to
504
     * AV_NOPTS_VALUE by default.
505
     */
506
    int64_t reference_dts;
507
} AVStream;
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509
#define AV_PROGRAM_RUNNING 1
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511
/**
512
 * New fields can be added to the end with minor version bumps.
513
 * Removal, reordering and changes to existing fields require a major
514
 * version bump.
515
 * sizeof(AVProgram) must not be used outside libav*.
516
 */
517
typedef struct AVProgram {
518
    int            id;
519
    char           *provider_name; ///< network name for DVB streams
520
    char           *name;          ///< service name for DVB streams
521
    int            flags;
522
    enum AVDiscard discard;        ///< selects which program to discard and which to feed to the caller
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    unsigned int   *stream_index;
524
    unsigned int   nb_stream_indexes;
525
    AVMetadata *metadata;
526
} AVProgram;
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528
#define AVFMTCTX_NOHEADER      0x0001 /**< signal that no header is present
529
                                         (streams are added dynamically) */
530

    
531
typedef struct AVChapter {
532
    int id;                 ///< unique ID to identify the chapter
533
    AVRational time_base;   ///< time base in which the start/end timestamps are specified
534
    int64_t start, end;     ///< chapter start/end time in time_base units
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    char *title;            ///< chapter title
536
    AVMetadata *metadata;
537
} AVChapter;
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539
#define MAX_STREAMS 20
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541
/**
542
 * Format I/O context.
543
 * New fields can be added to the end with minor version bumps.
544
 * Removal, reordering and changes to existing fields require a major
545
 * version bump.
546
 * sizeof(AVFormatContext) must not be used outside libav*.
547
 */
548
typedef struct AVFormatContext {
549
    const AVClass *av_class; /**< Set by avformat_alloc_context. */
550
    /* Can only be iformat or oformat, not both at the same time. */
551
    struct AVInputFormat *iformat;
552
    struct AVOutputFormat *oformat;
553
    void *priv_data;
554
    ByteIOContext *pb;
555
    unsigned int nb_streams;
556
    AVStream *streams[MAX_STREAMS];
557
    char filename[1024]; /**< input or output filename */
558
    /* stream info */
559
    int64_t timestamp;
560
    char title[512];
561
    char author[512];
562
    char copyright[512];
563
    char comment[512];
564
    char album[512];
565
    int year;  /**< ID3 year, 0 if none */
566
    int track; /**< track number, 0 if none */
567
    char genre[32]; /**< ID3 genre */
568

    
569
    int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
570
    /* private data for pts handling (do not modify directly). */
571
    /** This buffer is only needed when packets were already buffered but
572
       not decoded, for example to get the codec parameters in MPEG
573
       streams. */
574
    struct AVPacketList *packet_buffer;
575

    
576
    /** Decoding: position of the first frame of the component, in
577
       AV_TIME_BASE fractional seconds. NEVER set this value directly:
578
       It is deduced from the AVStream values.  */
579
    int64_t start_time;
580
    /** Decoding: duration of the stream, in AV_TIME_BASE fractional
581
       seconds. NEVER set this value directly: it is deduced from the
582
       AVStream values.  */
583
    int64_t duration;
584
    /** decoding: total file size, 0 if unknown */
585
    int64_t file_size;
586
    /** Decoding: total stream bitrate in bit/s, 0 if not
587
       available. Never set it directly if the file_size and the
588
       duration are known as ffmpeg can compute it automatically. */
589
    int bit_rate;
590

    
591
    /* av_read_frame() support */
592
    AVStream *cur_st;
593
#if LIBAVFORMAT_VERSION_INT < (53<<16)
594
    const uint8_t *cur_ptr_deprecated;
595
    int cur_len_deprecated;
596
    AVPacket cur_pkt_deprecated;
597
#endif
598

    
599
    /* av_seek_frame() support */
600
    int64_t data_offset; /** offset of the first packet */
601
    int index_built;
602

    
603
    int mux_rate;
604
    int packet_size;
605
    int preload;
606
    int max_delay;
607

    
608
#define AVFMT_NOOUTPUTLOOP -1
609
#define AVFMT_INFINITEOUTPUTLOOP 0
610
    /** number of times to loop output in formats that support it */
611
    int loop_output;
612

    
613
    int flags;
614
#define AVFMT_FLAG_GENPTS       0x0001 ///< Generate pts if missing even if it requires parsing future frames.
615
#define AVFMT_FLAG_IGNIDX       0x0002 ///< Ignore index.
616
#define AVFMT_FLAG_NONBLOCK     0x0004 ///< Do not block when reading packets from input.
617

    
618
    int loop_input;
619
    /** Decoding: size of data to probe; encoding: unused. */
620
    unsigned int probesize;
621

    
622
    /**
623
     * Maximum time (in AV_TIME_BASE units) during which the input should
624
     * be analyzed in av_find_stream_info().
625
     */
626
    int max_analyze_duration;
627

    
628
    const uint8_t *key;
629
    int keylen;
630

    
631
    unsigned int nb_programs;
632
    AVProgram **programs;
633

    
634
    /**
635
     * Forced video codec_id.
636
     * Demuxing: Set by user.
637
     */
638
    enum CodecID video_codec_id;
639
    /**
640
     * Forced audio codec_id.
641
     * Demuxing: Set by user.
642
     */
643
    enum CodecID audio_codec_id;
644
    /**
645
     * Forced subtitle codec_id.
646
     * Demuxing: Set by user.
647
     */
648
    enum CodecID subtitle_codec_id;
649

    
650
    /**
651
     * Maximum amount of memory in bytes to use per stream for the index.
652
     * If the needed index exceeds this size, entries will be discarded as
653
     * needed to maintain a smaller size. This can lead to slower or less
654
     * accurate seeking (depends on demuxer).
655
     * Demuxers for which a full in-memory index is mandatory will ignore
656
     * this.
657
     * muxing  : unused
658
     * demuxing: set by user
659
     */
660
    unsigned int max_index_size;
661

    
662
    /**
663
     * Maximum amount of memory in bytes to use for buffering frames
664
     * obtained from realtime capture devices.
665
     */
666
    unsigned int max_picture_buffer;
667

    
668
    unsigned int nb_chapters;
669
    AVChapter **chapters;
670

    
671
    /**
672
     * Flags to enable debugging.
673
     */
674
    int debug;
675
#define FF_FDEBUG_TS        0x0001
676

    
677
    /**
678
     * Raw packets from the demuxer, prior to parsing and decoding.
679
     * This buffer is used for buffering packets until the codec can
680
     * be identified, as parsing cannot be done without knowing the
681
     * codec.
682
     */
683
    struct AVPacketList *raw_packet_buffer;
684
    struct AVPacketList *raw_packet_buffer_end;
685

    
686
    struct AVPacketList *packet_buffer_end;
687

    
688
    AVMetadata *metadata;
689
} AVFormatContext;
690

    
691
typedef struct AVPacketList {
692
    AVPacket pkt;
693
    struct AVPacketList *next;
694
} AVPacketList;
695

    
696
#if LIBAVFORMAT_VERSION_INT < (53<<16)
697
extern AVInputFormat *first_iformat;
698
extern AVOutputFormat *first_oformat;
699
#endif
700

    
701
/**
702
 * If f is NULL, returns the first registered input format,
703
 * if f is non-NULL, returns the next registered input format after f,
704
 * or NULL if f is the last one.
705
 */
706
AVInputFormat  *av_iformat_next(AVInputFormat  *f);
707

    
708
/**
709
 * If f is NULL, returns the first registered output format,
710
 * if f is non-NULL, returns the next registered output format after f,
711
 * or NULL if f is the last one.
712
 */
713
AVOutputFormat *av_oformat_next(AVOutputFormat *f);
714

    
715
enum CodecID av_guess_image2_codec(const char *filename);
716

    
717
/* XXX: use automatic init with either ELF sections or C file parser */
718
/* modules */
719

    
720
/* utils.c */
721
void av_register_input_format(AVInputFormat *format);
722
void av_register_output_format(AVOutputFormat *format);
723
AVOutputFormat *guess_stream_format(const char *short_name,
724
                                    const char *filename,
725
                                    const char *mime_type);
726
AVOutputFormat *guess_format(const char *short_name,
727
                             const char *filename,
728
                             const char *mime_type);
729

    
730
/**
731
 * Guesses the codec ID based upon muxer and filename.
732
 */
733
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
734
                            const char *filename, const char *mime_type,
735
                            enum CodecType type);
736

    
737
/**
738
 * Send a nice hexadecimal dump of a buffer to the specified file stream.
739
 *
740
 * @param f The file stream pointer where the dump should be sent to.
741
 * @param buf buffer
742
 * @param size buffer size
743
 *
744
 * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
745
 */
746
void av_hex_dump(FILE *f, uint8_t *buf, int size);
747

    
748
/**
749
 * Send a nice hexadecimal dump of a buffer to the log.
750
 *
751
 * @param avcl A pointer to an arbitrary struct of which the first field is a
752
 * pointer to an AVClass struct.
753
 * @param level The importance level of the message, lower values signifying
754
 * higher importance.
755
 * @param buf buffer
756
 * @param size buffer size
757
 *
758
 * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
759
 */
760
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
761

    
762
/**
763
 * Send a nice dump of a packet to the specified file stream.
764
 *
765
 * @param f The file stream pointer where the dump should be sent to.
766
 * @param pkt packet to dump
767
 * @param dump_payload True if the payload must be displayed, too.
768
 */
769
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
770

    
771
/**
772
 * Send a nice dump of a packet to the log.
773
 *
774
 * @param avcl A pointer to an arbitrary struct of which the first field is a
775
 * pointer to an AVClass struct.
776
 * @param level The importance level of the message, lower values signifying
777
 * higher importance.
778
 * @param pkt packet to dump
779
 * @param dump_payload True if the payload must be displayed, too.
780
 */
781
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
782

    
783
/**
784
 * Initialize libavformat and register all the muxers, demuxers and
785
 * protocols. If you do not call this function, then you can select
786
 * exactly which formats you want to support.
787
 *
788
 * @see av_register_input_format()
789
 * @see av_register_output_format()
790
 * @see av_register_protocol()
791
 */
792
void av_register_all(void);
793

    
794
/** codec tag <-> codec id */
795
enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
796
unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id);
797

    
798
/* media file input */
799

    
800
/**
801
 * Finds AVInputFormat based on the short name of the input format.
802
 */
803
AVInputFormat *av_find_input_format(const char *short_name);
804

    
805
/**
806
 * Guess file format.
807
 *
808
 * @param is_opened Whether the file is already opened; determines whether
809
 *                  demuxers with or without AVFMT_NOFILE are probed.
810
 */
811
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
812

    
813
/**
814
 * Allocates all the structures needed to read an input stream.
815
 *        This does not open the needed codecs for decoding the stream[s].
816
 */
817
int av_open_input_stream(AVFormatContext **ic_ptr,
818
                         ByteIOContext *pb, const char *filename,
819
                         AVInputFormat *fmt, AVFormatParameters *ap);
820

    
821
/**
822
 * Open a media file as input. The codecs are not opened. Only the file
823
 * header (if present) is read.
824
 *
825
 * @param ic_ptr The opened media file handle is put here.
826
 * @param filename filename to open
827
 * @param fmt If non-NULL, force the file format to use.
828
 * @param buf_size optional buffer size (zero if default is OK)
829
 * @param ap Additional parameters needed when opening the file
830
 *           (NULL if default).
831
 * @return 0 if OK, AVERROR_xxx otherwise
832
 */
833
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
834
                       AVInputFormat *fmt,
835
                       int buf_size,
836
                       AVFormatParameters *ap);
837

    
838
#if LIBAVFORMAT_VERSION_MAJOR < 53
839
/**
840
 * @deprecated Use avformat_alloc_context() instead.
841
 */
842
attribute_deprecated AVFormatContext *av_alloc_format_context(void);
843
#endif
844

    
845
/**
846
 * Allocate an AVFormatContext.
847
 * Can be freed with av_free() but do not forget to free everything you
848
 * explicitly allocated as well!
849
 */
850
AVFormatContext *avformat_alloc_context(void);
851

    
852
/**
853
 * Read packets of a media file to get stream information. This
854
 * is useful for file formats with no headers such as MPEG. This
855
 * function also computes the real frame rate in case of MPEG-2 repeat
856
 * frame mode.
857
 * The logical file position is not changed by this function;
858
 * examined packets may be buffered for later processing.
859
 *
860
 * @param ic media file handle
861
 * @return >=0 if OK, AVERROR_xxx on error
862
 * @todo Let the user decide somehow what information is needed so that
863
 *       we do not waste time getting stuff the user does not need.
864
 */
865
int av_find_stream_info(AVFormatContext *ic);
866

    
867
/**
868
 * Read a transport packet from a media file.
869
 *
870
 * This function is obsolete and should never be used.
871
 * Use av_read_frame() instead.
872
 *
873
 * @param s media file handle
874
 * @param pkt is filled
875
 * @return 0 if OK, AVERROR_xxx on error
876
 */
877
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
878

    
879
/**
880
 * Return the next frame of a stream.
881
 *
882
 * The returned packet is valid
883
 * until the next av_read_frame() or until av_close_input_file() and
884
 * must be freed with av_free_packet. For video, the packet contains
885
 * exactly one frame. For audio, it contains an integer number of
886
 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
887
 * data). If the audio frames have a variable size (e.g. MPEG audio),
888
 * then it contains one frame.
889
 *
890
 * pkt->pts, pkt->dts and pkt->duration are always set to correct
891
 * values in AVStream.timebase units (and guessed if the format cannot
892
 * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
893
 * has B-frames, so it is better to rely on pkt->dts if you do not
894
 * decompress the payload.
895
 *
896
 * @return 0 if OK, < 0 on error or end of file
897
 */
898
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
899

    
900
/**
901
 * Seek to the key frame at timestamp.
902
 * 'timestamp' in 'stream_index'.
903
 * @param stream_index If stream_index is (-1), a default
904
 * stream is selected, and timestamp is automatically converted
905
 * from AV_TIME_BASE units to the stream specific time_base.
906
 * @param timestamp Timestamp in AVStream.time_base units
907
 *        or, if no stream is specified, in AV_TIME_BASE units.
908
 * @param flags flags which select direction and seeking mode
909
 * @return >= 0 on success
910
 */
911
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
912
                  int flags);
913

    
914
/**
915
 * Seek to timestamp ts.
916
 * Seeking will be done so that the point from which all active streams
917
 * can be presented successfully will be closest to ts and within min/max_ts.
918
 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
919
 *
920
 * if flags contain AVSEEK_FLAG_BYTE then all timestamps are in byte and
921
 * are the file position (this may not be supported by all demuxers).
922
 * if flags contain AVSEEK_FLAG_FRAME then all timestamps are in frames
923
 * in the stream with stream_index (this may not be supported by all demuxers).
924
 * else all timestamps are in units of the stream selected by stream_index or
925
 * if stream_index is -1, AV_TIME_BASE units.
926
 * if flags contain AVSEEK_FLAG_ANY then non keyframes are treated as
927
 * keyframes (this may not be supported by all demuxers).
928
 *
929
 * @param stream_index index of the stream which is used as timebase reference.
930
 * @param min_ts smallest acceptable timestamp
931
 * @param ts target timestamp
932
 * @param max_ts largest acceptable timestamp
933
 * @param flags flags
934
 * @returns >=0 on success, error code otherwise
935
 *
936
 * @NOTE this is part of the new seek API which is still under construction
937
 *       thus do not use this yet it may change any time, dont expect ABI
938
 *       compatibility yet!
939
 */
940
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
941

    
942
/**
943
 * Start playing a network based stream (e.g. RTSP stream) at the
944
 * current position.
945
 */
946
int av_read_play(AVFormatContext *s);
947

    
948
/**
949
 * Pause a network based stream (e.g. RTSP stream).
950
 *
951
 * Use av_read_play() to resume it.
952
 */
953
int av_read_pause(AVFormatContext *s);
954

    
955
/**
956
 * Free a AVFormatContext allocated by av_open_input_stream.
957
 * @param s context to free
958
 */
959
void av_close_input_stream(AVFormatContext *s);
960

    
961
/**
962
 * Close a media file (but not its codecs).
963
 *
964
 * @param s media file handle
965
 */
966
void av_close_input_file(AVFormatContext *s);
967

    
968
/**
969
 * Add a new stream to a media file.
970
 *
971
 * Can only be called in the read_header() function. If the flag
972
 * AVFMTCTX_NOHEADER is in the format context, then new streams
973
 * can be added in read_packet too.
974
 *
975
 * @param s media file handle
976
 * @param id file-format-dependent stream ID
977
 */
978
AVStream *av_new_stream(AVFormatContext *s, int id);
979
AVProgram *av_new_program(AVFormatContext *s, int id);
980

    
981
/**
982
 * Add a new chapter.
983
 * This function is NOT part of the public API
984
 * and should ONLY be used by demuxers.
985
 *
986
 * @param s media file handle
987
 * @param id unique ID for this chapter
988
 * @param start chapter start time in time_base units
989
 * @param end chapter end time in time_base units
990
 * @param title chapter title
991
 *
992
 * @return AVChapter or NULL on error
993
 */
994
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
995
                          int64_t start, int64_t end, const char *title);
996

    
997
/**
998
 * Set the pts for a given stream.
999
 *
1000
 * @param s stream
1001
 * @param pts_wrap_bits number of bits effectively used by the pts
1002
 *        (used for wrap control, 33 is the value for MPEG)
1003
 * @param pts_num numerator to convert to seconds (MPEG: 1)
1004
 * @param pts_den denominator to convert to seconds (MPEG: 90000)
1005
 */
1006
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
1007
                     int pts_num, int pts_den);
1008

    
1009
#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
1010
#define AVSEEK_FLAG_BYTE     2 ///< seeking based on position in bytes
1011
#define AVSEEK_FLAG_ANY      4 ///< seek to any frame, even non-keyframes
1012

    
1013
int av_find_default_stream_index(AVFormatContext *s);
1014

    
1015
/**
1016
 * Gets the index for a specific timestamp.
1017
 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
1018
 *                 to the timestamp which is <= the requested one, if backward
1019
 *                 is 0, then it will be >=
1020
 *              if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
1021
 * @return < 0 if no such timestamp could be found
1022
 */
1023
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
1024

    
1025
/**
1026
 * Ensures the index uses less memory than the maximum specified in
1027
 * AVFormatContext.max_index_size, by discarding entries if it grows
1028
 * too large.
1029
 * This function is not part of the public API and should only be called
1030
 * by demuxers.
1031
 */
1032
void ff_reduce_index(AVFormatContext *s, int stream_index);
1033

    
1034
/**
1035
 * Add an index entry into a sorted list. Update the entry if the list
1036
 * already contains it.
1037
 *
1038
 * @param timestamp timestamp in the time base of the given stream
1039
 */
1040
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1041
                       int size, int distance, int flags);
1042

    
1043
/**
1044
 * Does a binary search using av_index_search_timestamp() and
1045
 * AVCodec.read_timestamp().
1046
 * This is not supposed to be called directly by a user application,
1047
 * but by demuxers.
1048
 * @param target_ts target timestamp in the time base of the given stream
1049
 * @param stream_index stream number
1050
 */
1051
int av_seek_frame_binary(AVFormatContext *s, int stream_index,
1052
                         int64_t target_ts, int flags);
1053

    
1054
/**
1055
 * Updates cur_dts of all streams based on the given timestamp and AVStream.
1056
 *
1057
 * Stream ref_st unchanged, others set cur_dts in their native time base.
1058
 * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
1059
 * @param timestamp new dts expressed in time_base of param ref_st
1060
 * @param ref_st reference stream giving time_base of param timestamp
1061
 */
1062
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
1063

    
1064
/**
1065
 * Does a binary search using read_timestamp().
1066
 * This is not supposed to be called directly by a user application,
1067
 * but by demuxers.
1068
 * @param target_ts target timestamp in the time base of the given stream
1069
 * @param stream_index stream number
1070
 */
1071
int64_t av_gen_search(AVFormatContext *s, int stream_index,
1072
                      int64_t target_ts, int64_t pos_min,
1073
                      int64_t pos_max, int64_t pos_limit,
1074
                      int64_t ts_min, int64_t ts_max,
1075
                      int flags, int64_t *ts_ret,
1076
                      int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
1077

    
1078
/** media file output */
1079
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
1080

    
1081
/**
1082
 * Allocate the stream private data and write the stream header to an
1083
 * output media file.
1084
 *
1085
 * @param s media file handle
1086
 * @return 0 if OK, AVERROR_xxx on error
1087
 */
1088
int av_write_header(AVFormatContext *s);
1089

    
1090
/**
1091
 * Write a packet to an output media file.
1092
 *
1093
 * The packet shall contain one audio or video frame.
1094
 * The packet must be correctly interleaved according to the container
1095
 * specification, if not then av_interleaved_write_frame must be used.
1096
 *
1097
 * @param s media file handle
1098
 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1099
              dts/pts, ...
1100
 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
1101
 */
1102
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
1103

    
1104
/**
1105
 * Writes a packet to an output media file ensuring correct interleaving.
1106
 *
1107
 * The packet must contain one audio or video frame.
1108
 * If the packets are already correctly interleaved the application should
1109
 * call av_write_frame() instead as it is slightly faster. It is also important
1110
 * to keep in mind that completely non-interleaved input will need huge amounts
1111
 * of memory to interleave with this, so it is preferable to interleave at the
1112
 * demuxer level.
1113
 *
1114
 * @param s media file handle
1115
 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1116
              dts/pts, ...
1117
 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
1118
 */
1119
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
1120

    
1121
/**
1122
 * Interleave a packet per dts in an output media file.
1123
 *
1124
 * Packets with pkt->destruct == av_destruct_packet will be freed inside this
1125
 * function, so they cannot be used after it, note calling av_free_packet()
1126
 * on them is still safe.
1127
 *
1128
 * @param s media file handle
1129
 * @param out the interleaved packet will be output here
1130
 * @param in the input packet
1131
 * @param flush 1 if no further packets are available as input and all
1132
 *              remaining packets should be output
1133
 * @return 1 if a packet was output, 0 if no packet could be output,
1134
 *         < 0 if an error occurred
1135
 */
1136
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1137
                                 AVPacket *pkt, int flush);
1138

    
1139
/**
1140
 * @brief Write the stream trailer to an output media file and
1141
 *        free the file private data.
1142
 *
1143
 * May only be called after a successful call to av_write_header.
1144
 *
1145
 * @param s media file handle
1146
 * @return 0 if OK, AVERROR_xxx on error
1147
 */
1148
int av_write_trailer(AVFormatContext *s);
1149

    
1150
void dump_format(AVFormatContext *ic,
1151
                 int index,
1152
                 const char *url,
1153
                 int is_output);
1154

    
1155
#if LIBAVFORMAT_VERSION_MAJOR < 53
1156
/**
1157
 * Parses width and height out of string str.
1158
 * @deprecated Use av_parse_video_frame_size instead.
1159
 */
1160
attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
1161
                                          const char *str);
1162

    
1163
/**
1164
 * Converts frame rate from string to a fraction.
1165
 * @deprecated Use av_parse_video_frame_rate instead.
1166
 */
1167
attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
1168
                                          const char *arg);
1169
#endif
1170

    
1171
/**
1172
 * Parses \p datestr and returns a corresponding number of microseconds.
1173
 * @param datestr String representing a date or a duration.
1174
 * - If a date the syntax is:
1175
 * @code
1176
 *  [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
1177
 * @endcode
1178
 * Time is local time unless Z is appended, in which case it is
1179
 * interpreted as UTC.
1180
 * If the year-month-day part is not specified it takes the current
1181
 * year-month-day.
1182
 * Returns the number of microseconds since 1st of January, 1970 up to
1183
 * the time of the parsed date or INT64_MIN if \p datestr cannot be
1184
 * successfully parsed.
1185
 * - If a duration the syntax is:
1186
 * @code
1187
 *  [-]HH[:MM[:SS[.m...]]]
1188
 *  [-]S+[.m...]
1189
 * @endcode
1190
 * Returns the number of microseconds contained in a time interval
1191
 * with the specified duration or INT64_MIN if \p datestr cannot be
1192
 * successfully parsed.
1193
 * @param duration Flag which tells how to interpret \p datestr, if
1194
 * not zero \p datestr is interpreted as a duration, otherwise as a
1195
 * date.
1196
 */
1197
int64_t parse_date(const char *datestr, int duration);
1198

    
1199
/** Gets the current time in microseconds. */
1200
int64_t av_gettime(void);
1201

    
1202
/* ffm-specific for ffserver */
1203
#define FFM_PACKET_SIZE 4096
1204
int64_t ffm_read_write_index(int fd);
1205
int ffm_write_write_index(int fd, int64_t pos);
1206
void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
1207

    
1208
/**
1209
 * Attempts to find a specific tag in a URL.
1210
 *
1211
 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
1212
 * Return 1 if found.
1213
 */
1214
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
1215

    
1216
/**
1217
 * Returns in 'buf' the path with '%d' replaced by number.
1218
 *
1219
 * Also handles the '%0nd' format where 'n' is the total number
1220
 * of digits and '%%'.
1221
 *
1222
 * @param buf destination buffer
1223
 * @param buf_size destination buffer size
1224
 * @param path numbered sequence string
1225
 * @param number frame number
1226
 * @return 0 if OK, -1 on format error
1227
 */
1228
int av_get_frame_filename(char *buf, int buf_size,
1229
                          const char *path, int number);
1230

    
1231
/**
1232
 * Check whether filename actually is a numbered sequence generator.
1233
 *
1234
 * @param filename possible numbered sequence string
1235
 * @return 1 if a valid numbered sequence string, 0 otherwise
1236
 */
1237
int av_filename_number_test(const char *filename);
1238

    
1239
/**
1240
 * Generate an SDP for an RTP session.
1241
 *
1242
 * @param ac array of AVFormatContexts describing the RTP streams. If the
1243
 *           array is composed by only one context, such context can contain
1244
 *           multiple AVStreams (one AVStream per RTP stream). Otherwise,
1245
 *           all the contexts in the array (an AVCodecContext per RTP stream)
1246
 *           must contain only one AVStream.
1247
 * @param n_files number of AVCodecContexts contained in ac
1248
 * @param buff buffer where the SDP will be stored (must be allocated by
1249
 *             the caller)
1250
 * @param size the size of the buffer
1251
 * @return 0 if OK, AVERROR_xxx on error
1252
 */
1253
int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
1254

    
1255
#ifdef HAVE_AV_CONFIG_H
1256

    
1257
void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
1258

    
1259
#ifdef __GNUC__
1260
#define dynarray_add(tab, nb_ptr, elem)\
1261
do {\
1262
    __typeof__(tab) _tab = (tab);\
1263
    __typeof__(elem) _elem = (elem);\
1264
    (void)sizeof(**_tab == _elem); /* check that types are compatible */\
1265
    ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
1266
} while(0)
1267
#else
1268
#define dynarray_add(tab, nb_ptr, elem)\
1269
do {\
1270
    ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
1271
} while(0)
1272
#endif
1273

    
1274
time_t mktimegm(struct tm *tm);
1275
struct tm *brktimegm(time_t secs, struct tm *tm);
1276
const char *small_strptime(const char *p, const char *fmt,
1277
                           struct tm *dt);
1278

    
1279
struct in_addr;
1280
int resolve_host(struct in_addr *sin_addr, const char *hostname);
1281

    
1282
void url_split(char *proto, int proto_size,
1283
               char *authorization, int authorization_size,
1284
               char *hostname, int hostname_size,
1285
               int *port_ptr,
1286
               char *path, int path_size,
1287
               const char *url);
1288

    
1289
int match_ext(const char *filename, const char *extensions);
1290

    
1291
#endif /* HAVE_AV_CONFIG_H */
1292

    
1293
#endif /* AVFORMAT_AVFORMAT_H */