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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 43
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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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/**
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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.
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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 639-2/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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 */
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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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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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 * @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.
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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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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.
325
     */
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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)
434
    int64_t unused[4+1];
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    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
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    int64_t pts_buffer[MAX_REORDER_DELAY+1];
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    /**
446
     * sample aspect ratio (0 if unknown)
447
     * - encoding: Set by user.
448
     * - decoding: Set by libavformat.
449
     */
450
    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:
460
    /**
461
     * Timestamp corresponding to the last dts sync point.
462
     *
463
     * Initialized when AVCodecParserContext.dts_sync_point >= 0 and
464
     * a DTS is received from the underlying container. Otherwise set to
465
     * AV_NOPTS_VALUE by default.
466
     */
467
    int64_t reference_dts;
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    /**
470
     * Number of packets to buffer for codec probing
471
     * NOT PART OF PUBLIC API
472
     */
473
#define MAX_PROBE_PACKETS 2500
474
    int probe_packets;
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476
    /**
477
     * last packet in packet_buffer for this stream when muxing.
478
     * used internally, NOT PART OF PUBLIC API, dont read or write from outside of libav*
479
     */
480
    struct AVPacketList *last_in_packet_buffer;
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    /**
483
     * Average framerate
484
     */
485
    AVRational avg_frame_rate;
486
} AVStream;
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#define AV_PROGRAM_RUNNING 1
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/**
491
 * New fields can be added to the end with minor version bumps.
492
 * Removal, reordering and changes to existing fields require a major
493
 * version bump.
494
 * sizeof(AVProgram) must not be used outside libav*.
495
 */
496
typedef struct AVProgram {
497
    int            id;
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
499
    char           *provider_name; ///< network name for DVB streams
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    char           *name;          ///< service name for DVB streams
501
#endif
502
    int            flags;
503
    enum AVDiscard discard;        ///< selects which program to discard and which to feed to the caller
504
    unsigned int   *stream_index;
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    unsigned int   nb_stream_indexes;
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    AVMetadata *metadata;
507
} AVProgram;
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509
#define AVFMTCTX_NOHEADER      0x0001 /**< signal that no header is present
510
                                         (streams are added dynamically) */
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512
typedef struct AVChapter {
513
    int id;                 ///< unique ID to identify the chapter
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    AVRational time_base;   ///< time base in which the start/end timestamps are specified
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    int64_t start, end;     ///< chapter start/end time in time_base units
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
517
    char *title;            ///< chapter title
518
#endif
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    AVMetadata *metadata;
520
} AVChapter;
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#define MAX_STREAMS 20
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/**
525
 * Format I/O context.
526
 * 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
528
 * version bump.
529
 * sizeof(AVFormatContext) must not be used outside libav*.
530
 */
531
typedef struct AVFormatContext {
532
    const AVClass *av_class; /**< Set by avformat_alloc_context. */
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    /* Can only be iformat or oformat, not both at the same time. */
534
    struct AVInputFormat *iformat;
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    struct AVOutputFormat *oformat;
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    void *priv_data;
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    ByteIOContext *pb;
538
    unsigned int nb_streams;
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    AVStream *streams[MAX_STREAMS];
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    char filename[1024]; /**< input or output filename */
541
    /* stream info */
542
    int64_t timestamp;
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#if LIBAVFORMAT_VERSION_INT < (53<<16)
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    char title[512];
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    char author[512];
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    char copyright[512];
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    char comment[512];
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    char album[512];
549
    int year;  /**< ID3 year, 0 if none */
550
    int track; /**< track number, 0 if none */
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    char genre[32]; /**< ID3 genre */
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#endif
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554
    int ctx_flags; /**< Format-specific flags, see AVFMTCTX_xx */
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    /* private data for pts handling (do not modify directly). */
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    /** This buffer is only needed when packets were already buffered but
557
       not decoded, for example to get the codec parameters in MPEG
558
       streams. */
559
    struct AVPacketList *packet_buffer;
560

    
561
    /** Decoding: position of the first frame of the component, in
562
       AV_TIME_BASE fractional seconds. NEVER set this value directly:
563
       It is deduced from the AVStream values.  */
564
    int64_t start_time;
565
    /** Decoding: duration of the stream, in AV_TIME_BASE fractional
566
       seconds. NEVER set this value directly: it is deduced from the
567
       AVStream values.  */
568
    int64_t duration;
569
    /** decoding: total file size, 0 if unknown */
570
    int64_t file_size;
571
    /** Decoding: total stream bitrate in bit/s, 0 if not
572
       available. Never set it directly if the file_size and the
573
       duration are known as FFmpeg can compute it automatically. */
574
    int bit_rate;
575

    
576
    /* av_read_frame() support */
577
    AVStream *cur_st;
578
#if LIBAVFORMAT_VERSION_INT < (53<<16)
579
    const uint8_t *cur_ptr_deprecated;
580
    int cur_len_deprecated;
581
    AVPacket cur_pkt_deprecated;
582
#endif
583

    
584
    /* av_seek_frame() support */
585
    int64_t data_offset; /** offset of the first packet */
586
    int index_built;
587

    
588
    int mux_rate;
589
    unsigned int packet_size;
590
    int preload;
591
    int max_delay;
592

    
593
#define AVFMT_NOOUTPUTLOOP -1
594
#define AVFMT_INFINITEOUTPUTLOOP 0
595
    /** number of times to loop output in formats that support it */
596
    int loop_output;
597

    
598
    int flags;
599
#define AVFMT_FLAG_GENPTS       0x0001 ///< Generate missing pts even if it requires parsing future frames.
600
#define AVFMT_FLAG_IGNIDX       0x0002 ///< Ignore index.
601
#define AVFMT_FLAG_NONBLOCK     0x0004 ///< Do not block when reading packets from input.
602

    
603
    int loop_input;
604
    /** decoding: size of data to probe; encoding: unused. */
605
    unsigned int probesize;
606

    
607
    /**
608
     * Maximum time (in AV_TIME_BASE units) during which the input should
609
     * be analyzed in av_find_stream_info().
610
     */
611
    int max_analyze_duration;
612

    
613
    const uint8_t *key;
614
    int keylen;
615

    
616
    unsigned int nb_programs;
617
    AVProgram **programs;
618

    
619
    /**
620
     * Forced video codec_id.
621
     * Demuxing: Set by user.
622
     */
623
    enum CodecID video_codec_id;
624
    /**
625
     * Forced audio codec_id.
626
     * Demuxing: Set by user.
627
     */
628
    enum CodecID audio_codec_id;
629
    /**
630
     * Forced subtitle codec_id.
631
     * Demuxing: Set by user.
632
     */
633
    enum CodecID subtitle_codec_id;
634

    
635
    /**
636
     * Maximum amount of memory in bytes to use for the index of each stream.
637
     * If the index exceeds this size, entries will be discarded as
638
     * needed to maintain a smaller size. This can lead to slower or less
639
     * accurate seeking (depends on demuxer).
640
     * Demuxers for which a full in-memory index is mandatory will ignore
641
     * this.
642
     * muxing  : unused
643
     * demuxing: set by user
644
     */
645
    unsigned int max_index_size;
646

    
647
    /**
648
     * Maximum amount of memory in bytes to use for buffering frames
649
     * obtained from realtime capture devices.
650
     */
651
    unsigned int max_picture_buffer;
652

    
653
    unsigned int nb_chapters;
654
    AVChapter **chapters;
655

    
656
    /**
657
     * Flags to enable debugging.
658
     */
659
    int debug;
660
#define FF_FDEBUG_TS        0x0001
661

    
662
    /**
663
     * Raw packets from the demuxer, prior to parsing and decoding.
664
     * This buffer is used for buffering packets until the codec can
665
     * be identified, as parsing cannot be done without knowing the
666
     * codec.
667
     */
668
    struct AVPacketList *raw_packet_buffer;
669
    struct AVPacketList *raw_packet_buffer_end;
670

    
671
    struct AVPacketList *packet_buffer_end;
672

    
673
    AVMetadata *metadata;
674

    
675
    /**
676
     * Remaining size available for raw_packet_buffer, in bytes.
677
     * NOT PART OF PUBLIC API
678
     */
679
#define RAW_PACKET_BUFFER_SIZE 2500000
680
    int raw_packet_buffer_remaining_size;
681
} AVFormatContext;
682

    
683
typedef struct AVPacketList {
684
    AVPacket pkt;
685
    struct AVPacketList *next;
686
} AVPacketList;
687

    
688
#if LIBAVFORMAT_VERSION_INT < (53<<16)
689
extern AVInputFormat *first_iformat;
690
extern AVOutputFormat *first_oformat;
691
#endif
692

    
693
/**
694
 * If f is NULL, returns the first registered input format,
695
 * if f is non-NULL, returns the next registered input format after f
696
 * or NULL if f is the last one.
697
 */
698
AVInputFormat  *av_iformat_next(AVInputFormat  *f);
699

    
700
/**
701
 * If f is NULL, returns the first registered output format,
702
 * if f is non-NULL, returns the next registered output format after f
703
 * or NULL if f is the last one.
704
 */
705
AVOutputFormat *av_oformat_next(AVOutputFormat *f);
706

    
707
enum CodecID av_guess_image2_codec(const char *filename);
708

    
709
/* XXX: Use automatic init with either ELF sections or C file parser */
710
/* modules. */
711

    
712
/* utils.c */
713
void av_register_input_format(AVInputFormat *format);
714
void av_register_output_format(AVOutputFormat *format);
715
AVOutputFormat *guess_stream_format(const char *short_name,
716
                                    const char *filename,
717
                                    const char *mime_type);
718
AVOutputFormat *guess_format(const char *short_name,
719
                             const char *filename,
720
                             const char *mime_type);
721

    
722
/**
723
 * Guesses the codec ID based upon muxer and filename.
724
 */
725
enum CodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
726
                            const char *filename, const char *mime_type,
727
                            enum CodecType type);
728

    
729
/**
730
 * Sends a nice hexadecimal dump of a buffer to the specified file stream.
731
 *
732
 * @param f The file stream pointer where the dump should be sent to.
733
 * @param buf buffer
734
 * @param size buffer size
735
 *
736
 * @see av_hex_dump_log, av_pkt_dump, av_pkt_dump_log
737
 */
738
void av_hex_dump(FILE *f, uint8_t *buf, int size);
739

    
740
/**
741
 * Sends a nice hexadecimal dump of a buffer to the log.
742
 *
743
 * @param avcl A pointer to an arbitrary struct of which the first field is a
744
 * pointer to an AVClass struct.
745
 * @param level The importance level of the message, lower values signifying
746
 * higher importance.
747
 * @param buf buffer
748
 * @param size buffer size
749
 *
750
 * @see av_hex_dump, av_pkt_dump, av_pkt_dump_log
751
 */
752
void av_hex_dump_log(void *avcl, int level, uint8_t *buf, int size);
753

    
754
/**
755
 * Sends a nice dump of a packet to the specified file stream.
756
 *
757
 * @param f The file stream pointer where the dump should be sent to.
758
 * @param pkt packet to dump
759
 * @param dump_payload True if the payload must be displayed, too.
760
 */
761
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload);
762

    
763
/**
764
 * Sends a nice dump of a packet to the log.
765
 *
766
 * @param avcl A pointer to an arbitrary struct of which the first field is a
767
 * pointer to an AVClass struct.
768
 * @param level The importance level of the message, lower values signifying
769
 * higher importance.
770
 * @param pkt packet to dump
771
 * @param dump_payload True if the payload must be displayed, too.
772
 */
773
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload);
774

    
775
/**
776
 * Initializes libavformat and registers all the muxers, demuxers and
777
 * protocols. If you do not call this function, then you can select
778
 * exactly which formats you want to support.
779
 *
780
 * @see av_register_input_format()
781
 * @see av_register_output_format()
782
 * @see av_register_protocol()
783
 */
784
void av_register_all(void);
785

    
786
/** codec tag <-> codec id */
787
enum CodecID av_codec_get_id(const struct AVCodecTag * const *tags, unsigned int tag);
788
unsigned int av_codec_get_tag(const struct AVCodecTag * const *tags, enum CodecID id);
789

    
790
/* media file input */
791

    
792
/**
793
 * Finds AVInputFormat based on the short name of the input format.
794
 */
795
AVInputFormat *av_find_input_format(const char *short_name);
796

    
797
/**
798
 * Guesses the file format.
799
 *
800
 * @param is_opened Whether the file is already opened; determines whether
801
 *                  demuxers with or without AVFMT_NOFILE are probed.
802
 */
803
AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened);
804

    
805
/**
806
 * Allocates all the structures needed to read an input stream.
807
 *        This does not open the needed codecs for decoding the stream[s].
808
 */
809
int av_open_input_stream(AVFormatContext **ic_ptr,
810
                         ByteIOContext *pb, const char *filename,
811
                         AVInputFormat *fmt, AVFormatParameters *ap);
812

    
813
/**
814
 * Opens a media file as input. The codecs are not opened. Only the file
815
 * header (if present) is read.
816
 *
817
 * @param ic_ptr The opened media file handle is put here.
818
 * @param filename filename to open
819
 * @param fmt If non-NULL, force the file format to use.
820
 * @param buf_size optional buffer size (zero if default is OK)
821
 * @param ap Additional parameters needed when opening the file
822
 *           (NULL if default).
823
 * @return 0 if OK, AVERROR_xxx otherwise
824
 */
825
int av_open_input_file(AVFormatContext **ic_ptr, const char *filename,
826
                       AVInputFormat *fmt,
827
                       int buf_size,
828
                       AVFormatParameters *ap);
829

    
830
#if LIBAVFORMAT_VERSION_MAJOR < 53
831
/**
832
 * @deprecated Use avformat_alloc_context() instead.
833
 */
834
attribute_deprecated AVFormatContext *av_alloc_format_context(void);
835
#endif
836

    
837
/**
838
 * Allocates an AVFormatContext.
839
 * Can be freed with av_free() but do not forget to free everything you
840
 * explicitly allocated as well!
841
 */
842
AVFormatContext *avformat_alloc_context(void);
843

    
844
/**
845
 * Reads packets of a media file to get stream information. This
846
 * is useful for file formats with no headers such as MPEG. This
847
 * function also computes the real framerate in case of MPEG-2 repeat
848
 * frame mode.
849
 * The logical file position is not changed by this function;
850
 * examined packets may be buffered for later processing.
851
 *
852
 * @param ic media file handle
853
 * @return >=0 if OK, AVERROR_xxx on error
854
 * @todo Let the user decide somehow what information is needed so that
855
 *       we do not waste time getting stuff the user does not need.
856
 */
857
int av_find_stream_info(AVFormatContext *ic);
858

    
859
/**
860
 * Reads a transport packet from a media file.
861
 *
862
 * This function is obsolete and should never be used.
863
 * Use av_read_frame() instead.
864
 *
865
 * @param s media file handle
866
 * @param pkt is filled
867
 * @return 0 if OK, AVERROR_xxx on error
868
 */
869
int av_read_packet(AVFormatContext *s, AVPacket *pkt);
870

    
871
/**
872
 * Returns the next frame of a stream.
873
 *
874
 * The returned packet is valid
875
 * until the next av_read_frame() or until av_close_input_file() and
876
 * must be freed with av_free_packet. For video, the packet contains
877
 * exactly one frame. For audio, it contains an integer number of
878
 * frames if each frame has a known fixed size (e.g. PCM or ADPCM
879
 * data). If the audio frames have a variable size (e.g. MPEG audio),
880
 * then it contains one frame.
881
 *
882
 * pkt->pts, pkt->dts and pkt->duration are always set to correct
883
 * values in AVStream.time_base units (and guessed if the format cannot
884
 * provide them). pkt->pts can be AV_NOPTS_VALUE if the video format
885
 * has B-frames, so it is better to rely on pkt->dts if you do not
886
 * decompress the payload.
887
 *
888
 * @return 0 if OK, < 0 on error or end of file
889
 */
890
int av_read_frame(AVFormatContext *s, AVPacket *pkt);
891

    
892
/**
893
 * Seeks to the keyframe at timestamp.
894
 * 'timestamp' in 'stream_index'.
895
 * @param stream_index If stream_index is (-1), a default
896
 * stream is selected, and timestamp is automatically converted
897
 * from AV_TIME_BASE units to the stream specific time_base.
898
 * @param timestamp Timestamp in AVStream.time_base units
899
 *        or, if no stream is specified, in AV_TIME_BASE units.
900
 * @param flags flags which select direction and seeking mode
901
 * @return >= 0 on success
902
 */
903
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp,
904
                  int flags);
905

    
906
/**
907
 * Seeks to timestamp ts.
908
 * Seeking will be done so that the point from which all active streams
909
 * can be presented successfully will be closest to ts and within min/max_ts.
910
 * Active streams are all streams that have AVStream.discard < AVDISCARD_ALL.
911
 *
912
 * If flags contain AVSEEK_FLAG_BYTE, then all timestamps are in bytes and
913
 * are the file position (this may not be supported by all demuxers).
914
 * If flags contain AVSEEK_FLAG_FRAME, then all timestamps are in frames
915
 * in the stream with stream_index (this may not be supported by all demuxers).
916
 * Otherwise all timestamps are in units of the stream selected by stream_index
917
 * or if stream_index is -1, in AV_TIME_BASE units.
918
 * If flags contain AVSEEK_FLAG_ANY, then non-keyframes are treated as
919
 * keyframes (this may not be supported by all demuxers).
920
 *
921
 * @param stream_index index of the stream which is used as time base reference
922
 * @param min_ts smallest acceptable timestamp
923
 * @param ts target timestamp
924
 * @param max_ts largest acceptable timestamp
925
 * @param flags flags
926
 * @returns >=0 on success, error code otherwise
927
 *
928
 * @NOTE This is part of the new seek API which is still under construction.
929
 *       Thus do not use this yet. It may change at any time, do not expect
930
 *       ABI compatibility yet!
931
 */
932
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags);
933

    
934
/**
935
 * Starts playing a network-based stream (e.g. RTSP stream) at the
936
 * current position.
937
 */
938
int av_read_play(AVFormatContext *s);
939

    
940
/**
941
 * Pauses a network-based stream (e.g. RTSP stream).
942
 *
943
 * Use av_read_play() to resume it.
944
 */
945
int av_read_pause(AVFormatContext *s);
946

    
947
/**
948
 * Frees a AVFormatContext allocated by av_open_input_stream.
949
 * @param s context to free
950
 */
951
void av_close_input_stream(AVFormatContext *s);
952

    
953
/**
954
 * Closes a media file (but not its codecs).
955
 *
956
 * @param s media file handle
957
 */
958
void av_close_input_file(AVFormatContext *s);
959

    
960
/**
961
 * Adds a new stream to a media file.
962
 *
963
 * Can only be called in the read_header() function. If the flag
964
 * AVFMTCTX_NOHEADER is in the format context, then new streams
965
 * can be added in read_packet too.
966
 *
967
 * @param s media file handle
968
 * @param id file-format-dependent stream ID
969
 */
970
AVStream *av_new_stream(AVFormatContext *s, int id);
971
AVProgram *av_new_program(AVFormatContext *s, int id);
972

    
973
/**
974
 * Adds a new chapter.
975
 * This function is NOT part of the public API
976
 * and should ONLY be used by demuxers.
977
 *
978
 * @param s media file handle
979
 * @param id unique ID for this chapter
980
 * @param start chapter start time in time_base units
981
 * @param end chapter end time in time_base units
982
 * @param title chapter title
983
 *
984
 * @return AVChapter or NULL on error
985
 */
986
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
987
                          int64_t start, int64_t end, const char *title);
988

    
989
/**
990
 * Sets the pts for a given stream.
991
 *
992
 * @param s stream
993
 * @param pts_wrap_bits number of bits effectively used by the pts
994
 *        (used for wrap control, 33 is the value for MPEG)
995
 * @param pts_num numerator to convert to seconds (MPEG: 1)
996
 * @param pts_den denominator to convert to seconds (MPEG: 90000)
997
 */
998
void av_set_pts_info(AVStream *s, int pts_wrap_bits,
999
                     unsigned int pts_num, unsigned int pts_den);
1000

    
1001
#define AVSEEK_FLAG_BACKWARD 1 ///< seek backward
1002
#define AVSEEK_FLAG_BYTE     2 ///< seeking based on position in bytes
1003
#define AVSEEK_FLAG_ANY      4 ///< seek to any frame, even non-keyframes
1004
#define AVSEEK_FLAG_FRAME    8 ///< seeking based on frame number
1005

    
1006
int av_find_default_stream_index(AVFormatContext *s);
1007

    
1008
/**
1009
 * Gets the index for a specific timestamp.
1010
 * @param flags if AVSEEK_FLAG_BACKWARD then the returned index will correspond
1011
 *                 to the timestamp which is <= the requested one, if backward
1012
 *                 is 0, then it will be >=
1013
 *              if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise
1014
 * @return < 0 if no such timestamp could be found
1015
 */
1016
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags);
1017

    
1018
/**
1019
 * Ensures the index uses less memory than the maximum specified in
1020
 * AVFormatContext.max_index_size by discarding entries if it grows
1021
 * too large.
1022
 * This function is not part of the public API and should only be called
1023
 * by demuxers.
1024
 */
1025
void ff_reduce_index(AVFormatContext *s, int stream_index);
1026

    
1027
/**
1028
 * Adds an index entry into a sorted list. Updates the entry if the list
1029
 * already contains it.
1030
 *
1031
 * @param timestamp timestamp in the time base of the given stream
1032
 */
1033
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp,
1034
                       int size, int distance, int flags);
1035

    
1036
/**
1037
 * Does a binary search using av_index_search_timestamp() and
1038
 * AVCodec.read_timestamp().
1039
 * This is not supposed to be called directly by a user application,
1040
 * but by demuxers.
1041
 * @param target_ts target timestamp in the time base of the given stream
1042
 * @param stream_index stream number
1043
 */
1044
int av_seek_frame_binary(AVFormatContext *s, int stream_index,
1045
                         int64_t target_ts, int flags);
1046

    
1047
/**
1048
 * Updates cur_dts of all streams based on the given timestamp and AVStream.
1049
 *
1050
 * Stream ref_st unchanged, others set cur_dts in their native time base.
1051
 * Only needed for timestamp wrapping or if (dts not set and pts!=dts).
1052
 * @param timestamp new dts expressed in time_base of param ref_st
1053
 * @param ref_st reference stream giving time_base of param timestamp
1054
 */
1055
void av_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
1056

    
1057
/**
1058
 * Does a binary search using read_timestamp().
1059
 * This is not supposed to be called directly by a user application,
1060
 * but by demuxers.
1061
 * @param target_ts target timestamp in the time base of the given stream
1062
 * @param stream_index stream number
1063
 */
1064
int64_t av_gen_search(AVFormatContext *s, int stream_index,
1065
                      int64_t target_ts, int64_t pos_min,
1066
                      int64_t pos_max, int64_t pos_limit,
1067
                      int64_t ts_min, int64_t ts_max,
1068
                      int flags, int64_t *ts_ret,
1069
                      int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
1070

    
1071
/** media file output */
1072
int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
1073

    
1074
/**
1075
 * Allocates the stream private data and writes the stream header to an
1076
 * output media file.
1077
 *
1078
 * @param s media file handle
1079
 * @return 0 if OK, AVERROR_xxx on error
1080
 */
1081
int av_write_header(AVFormatContext *s);
1082

    
1083
/**
1084
 * Writes a packet to an output media file.
1085
 *
1086
 * The packet shall contain one audio or video frame.
1087
 * The packet must be correctly interleaved according to the container
1088
 * specification, if not then av_interleaved_write_frame must be used.
1089
 *
1090
 * @param s media file handle
1091
 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1092
              dts/pts, ...
1093
 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
1094
 */
1095
int av_write_frame(AVFormatContext *s, AVPacket *pkt);
1096

    
1097
/**
1098
 * Writes a packet to an output media file ensuring correct interleaving.
1099
 *
1100
 * The packet must contain one audio or video frame.
1101
 * If the packets are already correctly interleaved, the application should
1102
 * call av_write_frame() instead as it is slightly faster. It is also important
1103
 * to keep in mind that completely non-interleaved input will need huge amounts
1104
 * of memory to interleave with this, so it is preferable to interleave at the
1105
 * demuxer level.
1106
 *
1107
 * @param s media file handle
1108
 * @param pkt The packet, which contains the stream_index, buf/buf_size,
1109
              dts/pts, ...
1110
 * @return < 0 on error, = 0 if OK, 1 if end of stream wanted
1111
 */
1112
int av_interleaved_write_frame(AVFormatContext *s, AVPacket *pkt);
1113

    
1114
/**
1115
 * Interleaves a packet per dts in an output media file.
1116
 *
1117
 * Packets with pkt->destruct == av_destruct_packet will be freed inside this
1118
 * function, so they cannot be used after it. Note that calling av_free_packet()
1119
 * on them is still safe.
1120
 *
1121
 * @param s media file handle
1122
 * @param out the interleaved packet will be output here
1123
 * @param in the input packet
1124
 * @param flush 1 if no further packets are available as input and all
1125
 *              remaining packets should be output
1126
 * @return 1 if a packet was output, 0 if no packet could be output,
1127
 *         < 0 if an error occurred
1128
 */
1129
int av_interleave_packet_per_dts(AVFormatContext *s, AVPacket *out,
1130
                                 AVPacket *pkt, int flush);
1131

    
1132
/**
1133
 * Writes the stream trailer to an output media file and frees the
1134
 * file private data.
1135
 *
1136
 * May only be called after a successful call to av_write_header.
1137
 *
1138
 * @param s media file handle
1139
 * @return 0 if OK, AVERROR_xxx on error
1140
 */
1141
int av_write_trailer(AVFormatContext *s);
1142

    
1143
void dump_format(AVFormatContext *ic,
1144
                 int index,
1145
                 const char *url,
1146
                 int is_output);
1147

    
1148
#if LIBAVFORMAT_VERSION_MAJOR < 53
1149
/**
1150
 * Parses width and height out of string str.
1151
 * @deprecated Use av_parse_video_frame_size instead.
1152
 */
1153
attribute_deprecated int parse_image_size(int *width_ptr, int *height_ptr,
1154
                                          const char *str);
1155

    
1156
/**
1157
 * Converts framerate from a string to a fraction.
1158
 * @deprecated Use av_parse_video_frame_rate instead.
1159
 */
1160
attribute_deprecated int parse_frame_rate(int *frame_rate, int *frame_rate_base,
1161
                                          const char *arg);
1162
#endif
1163

    
1164
/**
1165
 * Parses datestr and returns a corresponding number of microseconds.
1166
 * @param datestr String representing a date or a duration.
1167
 * - If a date the syntax is:
1168
 * @code
1169
 *  [{YYYY-MM-DD|YYYYMMDD}]{T| }{HH[:MM[:SS[.m...]]][Z]|HH[MM[SS[.m...]]][Z]}
1170
 * @endcode
1171
 * Time is local time unless Z is appended, in which case it is
1172
 * interpreted as UTC.
1173
 * If the year-month-day part is not specified it takes the current
1174
 * year-month-day.
1175
 * Returns the number of microseconds since 1st of January, 1970 up to
1176
 * the time of the parsed date or INT64_MIN if datestr cannot be
1177
 * successfully parsed.
1178
 * - If a duration the syntax is:
1179
 * @code
1180
 *  [-]HH[:MM[:SS[.m...]]]
1181
 *  [-]S+[.m...]
1182
 * @endcode
1183
 * Returns the number of microseconds contained in a time interval
1184
 * with the specified duration or INT64_MIN if datestr cannot be
1185
 * successfully parsed.
1186
 * @param duration Flag which tells how to interpret datestr, if
1187
 * not zero datestr is interpreted as a duration, otherwise as a
1188
 * date.
1189
 */
1190
int64_t parse_date(const char *datestr, int duration);
1191

    
1192
/** Gets the current time in microseconds. */
1193
int64_t av_gettime(void);
1194

    
1195
/* ffm-specific for ffserver */
1196
#define FFM_PACKET_SIZE 4096
1197
int64_t ffm_read_write_index(int fd);
1198
int ffm_write_write_index(int fd, int64_t pos);
1199
void ffm_set_write_index(AVFormatContext *s, int64_t pos, int64_t file_size);
1200

    
1201
/**
1202
 * Attempts to find a specific tag in a URL.
1203
 *
1204
 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
1205
 * Return 1 if found.
1206
 */
1207
int find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
1208

    
1209
/**
1210
 * Returns in 'buf' the path with '%d' replaced by a number.
1211
 *
1212
 * Also handles the '%0nd' format where 'n' is the total number
1213
 * of digits and '%%'.
1214
 *
1215
 * @param buf destination buffer
1216
 * @param buf_size destination buffer size
1217
 * @param path numbered sequence string
1218
 * @param number frame number
1219
 * @return 0 if OK, -1 on format error
1220
 */
1221
int av_get_frame_filename(char *buf, int buf_size,
1222
                          const char *path, int number);
1223

    
1224
/**
1225
 * Checks whether filename actually is a numbered sequence generator.
1226
 *
1227
 * @param filename possible numbered sequence string
1228
 * @return 1 if a valid numbered sequence string, 0 otherwise
1229
 */
1230
int av_filename_number_test(const char *filename);
1231

    
1232
/**
1233
 * Generates an SDP for an RTP session.
1234
 *
1235
 * @param ac array of AVFormatContexts describing the RTP streams. If the
1236
 *           array is composed by only one context, such context can contain
1237
 *           multiple AVStreams (one AVStream per RTP stream). Otherwise,
1238
 *           all the contexts in the array (an AVCodecContext per RTP stream)
1239
 *           must contain only one AVStream.
1240
 * @param n_files number of AVCodecContexts contained in ac
1241
 * @param buff buffer where the SDP will be stored (must be allocated by
1242
 *             the caller)
1243
 * @param size the size of the buffer
1244
 * @return 0 if OK, AVERROR_xxx on error
1245
 */
1246
int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size);
1247

    
1248
#ifdef HAVE_AV_CONFIG_H
1249

    
1250
void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
1251

    
1252
#ifdef __GNUC__
1253
#define dynarray_add(tab, nb_ptr, elem)\
1254
do {\
1255
    __typeof__(tab) _tab = (tab);\
1256
    __typeof__(elem) _elem = (elem);\
1257
    (void)sizeof(**_tab == _elem); /* check that types are compatible */\
1258
    ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
1259
} while(0)
1260
#else
1261
#define dynarray_add(tab, nb_ptr, elem)\
1262
do {\
1263
    ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
1264
} while(0)
1265
#endif
1266

    
1267
time_t mktimegm(struct tm *tm);
1268
struct tm *brktimegm(time_t secs, struct tm *tm);
1269
const char *small_strptime(const char *p, const char *fmt,
1270
                           struct tm *dt);
1271

    
1272
struct in_addr;
1273
int resolve_host(struct in_addr *sin_addr, const char *hostname);
1274

    
1275
void url_split(char *proto, int proto_size,
1276
               char *authorization, int authorization_size,
1277
               char *hostname, int hostname_size,
1278
               int *port_ptr,
1279
               char *path, int path_size,
1280
               const char *url);
1281

    
1282
/**
1283
 * Returns a positive value if the given filename has one of the given
1284
 * extensions, 0 otherwise.
1285
 *
1286
 * @param extensions a comma-separated list of filename extensions
1287
 */
1288
int match_ext(const char *filename, const char *extensions);
1289

    
1290
#endif /* HAVE_AV_CONFIG_H */
1291

    
1292
#endif /* AVFORMAT_AVFORMAT_H */