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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_INTERNAL_H
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#define AVFORMAT_INTERNAL_H
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#include <stdint.h>
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#include "avformat.h"
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typedef struct AVCodecTag {
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    enum CodecID id;
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    unsigned int tag;
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} AVCodecTag;
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void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
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#ifdef __GNUC__
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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    __typeof__(tab) _tab = (tab);\
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    __typeof__(elem) _elem = (elem);\
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    (void)sizeof(**_tab == _elem); /* check that types are compatible */\
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    ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
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} while(0)
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#else
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#define dynarray_add(tab, nb_ptr, elem)\
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do {\
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    ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
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} while(0)
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#endif
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time_t mktimegm(struct tm *tm);
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struct tm *brktimegm(time_t secs, struct tm *tm);
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const char *small_strptime(const char *p, const char *fmt,
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                           struct tm *dt);
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char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
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void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
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/**
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 * Add packet to AVFormatContext->packet_buffer list, determining its
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 * interleaved position using compare() function argument.
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 */
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void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
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                              int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
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void ff_read_frame_flush(AVFormatContext *s);
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#define NTP_OFFSET 2208988800ULL
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#define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
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/** Gets the current time since NTP epoch in microseconds. */
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uint64_t ff_ntp_time(void);
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/**
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 * Probes a bytestream to determine the input format. Each time a probe returns
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 * with a score that is too low, the probe buffer size is increased and another
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 * attempt is made. When the maximum probe size is reached, the input format
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 * with the highest score is returned.
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 *
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 * @param pb the bytestream to probe, it may be closed and opened again
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 * @param fmt the input format is put here
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 * @param filename the filename of the stream
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 * @param logctx the log context
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 * @param offset the offset within the bytestream to probe from
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 * @param max_probe_size the maximum probe buffer size (zero for default)
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 * @return 0 in case of success, a negative value corresponding to an
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 * AVERROR code otherwise
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 */
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int ff_probe_input_buffer(ByteIOContext **pb, AVInputFormat **fmt,
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                          const char *filename, void *logctx,
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                          unsigned int offset, unsigned int max_probe_size);
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/**
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 * Splits a URL string into components. To reassemble components back into
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 * a URL, use ff_url_join instead of using snprintf directly.
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 *
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 * The pointers to buffers for storing individual components may be null,
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 * in order to ignore that component. Buffers for components not found are
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 * set to empty strings. If the port isn't found, it is set to a negative
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 * value.
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 *
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 * @see ff_url_join
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 *
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 * @param proto the buffer for the protocol
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 * @param proto_size the size of the proto buffer
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 * @param authorization the buffer for the authorization
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 * @param authorization_size the size of the authorization buffer
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 * @param hostname the buffer for the host name
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 * @param hostname_size the size of the hostname buffer
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 * @param port_ptr a pointer to store the port number in
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 * @param path the buffer for the path
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 * @param path_size the size of the path buffer
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 * @param url the URL to split
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 */
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void ff_url_split(char *proto, int proto_size,
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                  char *authorization, int authorization_size,
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                  char *hostname, int hostname_size,
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                  int *port_ptr,
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                  char *path, int path_size,
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                  const char *url);
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/**
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 * Assembles a URL string from components. This is the reverse operation
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 * of ff_url_split.
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 *
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 * Note, this requires networking to be initialized, so the caller must
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 * ensure ff_network_init has been called.
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 *
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 * @see ff_url_split
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 *
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 * @param str the buffer to fill with the url
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 * @param size the size of the str buffer
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 * @param proto the protocol identifier, if null, the separator
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 *              after the identifier is left out, too
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 * @param authorization an optional authorization string, may be null
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 * @param hostname the host name string
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 * @param port the port number, left out from the string if negative
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 * @param fmt a generic format string for everything to add after the
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 *            host/port, may be null
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 * @return the number of characters written to the destination buffer
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 */
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int ff_url_join(char *str, int size, const char *proto,
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                const char *authorization, const char *hostname,
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                int port, const char *fmt, ...);
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/**
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 * Appends the media-specific SDP fragment for the media stream c
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 * to the buffer buff.
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 *
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 * Note, the buffer needs to be initialized, since it is appended to
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 * existing content.
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 *
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 * @param buff the buffer to append the SDP fragment to
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 * @param size the size of the buff buffer
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 * @param c the AVCodecContext of the media to describe
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 * @param dest_addr the destination address of the media stream, may be NULL
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 * @param port the destination port of the media stream, 0 if unknown
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 * @param ttl the time to live of the stream, 0 if not multicast
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 */
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void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
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                        const char *dest_addr, int port, int ttl);
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/**
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 * Write a packet to another muxer than the one the user originally
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 * intended. Useful when chaining muxers, where one muxer internally
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 * writes a received packet to another muxer.
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 *
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 * @param dst the muxer to write the packet to
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 * @param dst_stream the stream index within dst to write the packet to
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 * @param pkt the packet to be written
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 * @param src the muxer the packet originally was intended for
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 * @return the value av_write_frame returned
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 */
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int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
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                     AVFormatContext *src);
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#endif /* AVFORMAT_INTERNAL_H */