mirror of https://git.ffmpeg.org/ffmpeg.git
244 lines
8.7 KiB
C
244 lines
8.7 KiB
C
/*
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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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#define MAX_URL_SIZE 4096
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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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/**
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* Parse a string of hexadecimal strings. Any space between the hexadecimal
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* digits is ignored.
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*
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* @param data if non-null, the parsed data is written to this pointer
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* @param p the string to parse
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* @return the number of bytes written (or to be written, if data is null)
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*/
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int ff_hex_to_data(uint8_t *data, const char *p);
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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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/** Get 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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* Probe 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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#if FF_API_URL_SPLIT
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/**
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* @deprecated use av_url_split() instead
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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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#endif
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/**
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* Assemble a URL string from components. This is the reverse operation
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* of av_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 av_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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* An empty string is treated the same as a null string.
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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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* Append 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 dest_type the destination address type, 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, const char *dest_type,
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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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/**
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* Get the length in bytes which is needed to store val as v.
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*/
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int ff_get_v_length(uint64_t val);
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/**
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* Put val using a variable number of bytes.
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*/
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void ff_put_v(ByteIOContext *bc, uint64_t val);
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/**
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* Read a whole line of text from ByteIOContext. Stop reading after reaching
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* either a \n, a \0 or EOF. The returned string is always \0 terminated,
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* and may be truncated if the buffer is too small.
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*
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* @param s the read-only ByteIOContext
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* @param buf buffer to store the read line
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* @param maxlen size of the buffer
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* @return the length of the string written in the buffer, not including the
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* final \0
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*/
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int ff_get_line(ByteIOContext *s, char *buf, int maxlen);
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#define SPACE_CHARS " \t\r\n"
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/**
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* Callback function type for ff_parse_key_value.
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*
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* @param key a pointer to the key
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* @param key_len the number of bytes that belong to the key, including the '='
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* char
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* @param dest return the destination pointer for the value in *dest, may
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* be null to ignore the value
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* @param dest_len the length of the *dest buffer
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*/
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typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
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int key_len, char **dest, int *dest_len);
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/**
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* Parse a string with comma-separated key=value pairs. The value strings
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* may be quoted and may contain escaped characters within quoted strings.
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*
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* @param str the string to parse
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* @param callback_get_buf function that returns where to store the
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* unescaped value string.
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* @param context the opaque context pointer to pass to callback_get_buf
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*/
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void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
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void *context);
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/**
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* Find stream index based on format-specific stream ID
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* @return stream index, or < 0 on error
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*/
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int ff_find_stream_index(AVFormatContext *s, int id);
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/**
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* Internal version of av_index_search_timestamp
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*/
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int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
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int64_t wanted_timestamp, int flags);
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/**
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* Internal version of av_add_index_entry
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*/
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int ff_add_index_entry(AVIndexEntry **index_entries,
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int *nb_index_entries,
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unsigned int *index_entries_allocated_size,
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int64_t pos, int64_t timestamp, int size, int distance, int flags);
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#endif /* AVFORMAT_INTERNAL_H */
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