2 * copyright (c) 2001 Fabrice Bellard
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVFORMAT_INTERNAL_H
22 #define AVFORMAT_INTERNAL_H
27 typedef struct AVCodecTag {
32 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
35 #define dynarray_add(tab, nb_ptr, elem)\
37 __typeof__(tab) _tab = (tab);\
38 __typeof__(elem) _elem = (elem);\
39 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
40 ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
43 #define dynarray_add(tab, nb_ptr, elem)\
45 ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
49 time_t mktimegm(struct tm *tm);
50 struct tm *brktimegm(time_t secs, struct tm *tm);
51 const char *small_strptime(const char *p, const char *fmt,
54 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
56 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
59 * Add packet to AVFormatContext->packet_buffer list, determining its
60 * interleaved position using compare() function argument.
62 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
63 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
65 void ff_read_frame_flush(AVFormatContext *s);
67 #define NTP_OFFSET 2208988800ULL
68 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
70 /** Gets the current time since NTP epoch in microseconds. */
71 uint64_t ff_ntp_time(void);
74 * Probes a bytestream to determine the input format. Each time a probe returns
75 * with a score that is too low, the probe buffer size is increased and another
76 * attempt is made. When the maximum probe size is reached, the input format
77 * with the highest score is returned.
79 * @param pb the bytestream to probe, it may be closed and opened again
80 * @param fmt the input format is put here
81 * @param filename the filename of the stream
82 * @param logctx the log context
83 * @param offset the offset within the bytestream to probe from
84 * @param max_probe_size the maximum probe buffer size (zero for default)
85 * @return 0 in case of success, a negative value corresponding to an
86 * AVERROR code otherwise
88 int ff_probe_input_buffer(ByteIOContext **pb, AVInputFormat **fmt,
89 const char *filename, void *logctx,
90 unsigned int offset, unsigned int max_probe_size);
93 * Splits a URL string into components. To reassemble components back into
94 * a URL, use ff_url_join instead of using snprintf directly.
96 * The pointers to buffers for storing individual components may be null,
97 * in order to ignore that component. Buffers for components not found are
98 * set to empty strings. If the port isn't found, it is set to a negative
103 * @param proto the buffer for the protocol
104 * @param proto_size the size of the proto buffer
105 * @param authorization the buffer for the authorization
106 * @param authorization_size the size of the authorization buffer
107 * @param hostname the buffer for the host name
108 * @param hostname_size the size of the hostname buffer
109 * @param port_ptr a pointer to store the port number in
110 * @param path the buffer for the path
111 * @param path_size the size of the path buffer
112 * @param url the URL to split
114 void ff_url_split(char *proto, int proto_size,
115 char *authorization, int authorization_size,
116 char *hostname, int hostname_size,
118 char *path, int path_size,
122 * Assembles a URL string from components. This is the reverse operation
125 * Note, this requires networking to be initialized, so the caller must
126 * ensure ff_network_init has been called.
130 * @param str the buffer to fill with the url
131 * @param size the size of the str buffer
132 * @param proto the protocol identifier, if null, the separator
133 * after the identifier is left out, too
134 * @param authorization an optional authorization string, may be null
135 * @param hostname the host name string
136 * @param port the port number, left out from the string if negative
137 * @param fmt a generic format string for everything to add after the
138 * host/port, may be null
139 * @return the number of characters written to the destination buffer
141 int ff_url_join(char *str, int size, const char *proto,
142 const char *authorization, const char *hostname,
143 int port, const char *fmt, ...);
146 * Appends the media-specific SDP fragment for the media stream c
147 * to the buffer buff.
149 * Note, the buffer needs to be initialized, since it is appended to
152 * @param buff the buffer to append the SDP fragment to
153 * @param size the size of the buff buffer
154 * @param c the AVCodecContext of the media to describe
155 * @param dest_addr the destination address of the media stream, may be NULL
156 * @param port the destination port of the media stream, 0 if unknown
157 * @param ttl the time to live of the stream, 0 if not multicast
159 void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
160 const char *dest_addr, int port, int ttl);
163 * Write a packet to another muxer than the one the user originally
164 * intended. Useful when chaining muxers, where one muxer internally
165 * writes a received packet to another muxer.
167 * @param dst the muxer to write the packet to
168 * @param dst_stream the stream index within dst to write the packet to
169 * @param pkt the packet to be written
170 * @param src the muxer the packet originally was intended for
171 * @return the value av_write_frame returned
173 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
174 AVFormatContext *src);
176 #endif /* AVFORMAT_INTERNAL_H */