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 #define MAX_URL_SIZE 4096
29 typedef struct AVCodecTag {
34 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
37 #define dynarray_add(tab, nb_ptr, elem)\
39 __typeof__(tab) _tab = (tab);\
40 __typeof__(elem) _elem = (elem);\
41 (void)sizeof(**_tab == _elem); /* check that types are compatible */\
42 ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
45 #define dynarray_add(tab, nb_ptr, elem)\
47 ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
51 struct tm *brktimegm(time_t secs, struct tm *tm);
53 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
56 * Parse a string of hexadecimal strings. Any space between the hexadecimal
59 * @param data if non-null, the parsed data is written to this pointer
60 * @param p the string to parse
61 * @return the number of bytes written (or to be written, if data is null)
63 int ff_hex_to_data(uint8_t *data, const char *p);
65 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
68 * Add packet to AVFormatContext->packet_buffer list, determining its
69 * interleaved position using compare() function argument.
71 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
72 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
74 void ff_read_frame_flush(AVFormatContext *s);
76 #define NTP_OFFSET 2208988800ULL
77 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
79 /** Get the current time since NTP epoch in microseconds. */
80 uint64_t ff_ntp_time(void);
84 * @deprecated use av_url_split() instead
86 void ff_url_split(char *proto, int proto_size,
87 char *authorization, int authorization_size,
88 char *hostname, int hostname_size,
90 char *path, int path_size,
95 * Assemble a URL string from components. This is the reverse operation
98 * Note, this requires networking to be initialized, so the caller must
99 * ensure ff_network_init has been called.
103 * @param str the buffer to fill with the url
104 * @param size the size of the str buffer
105 * @param proto the protocol identifier, if null, the separator
106 * after the identifier is left out, too
107 * @param authorization an optional authorization string, may be null.
108 * An empty string is treated the same as a null string.
109 * @param hostname the host name string
110 * @param port the port number, left out from the string if negative
111 * @param fmt a generic format string for everything to add after the
112 * host/port, may be null
113 * @return the number of characters written to the destination buffer
115 int ff_url_join(char *str, int size, const char *proto,
116 const char *authorization, const char *hostname,
117 int port, const char *fmt, ...);
120 * Append the media-specific SDP fragment for the media stream c
121 * to the buffer buff.
123 * Note, the buffer needs to be initialized, since it is appended to
126 * @param buff the buffer to append the SDP fragment to
127 * @param size the size of the buff buffer
128 * @param c the AVCodecContext of the media to describe
129 * @param dest_addr the destination address of the media stream, may be NULL
130 * @param dest_type the destination address type, may be NULL
131 * @param port the destination port of the media stream, 0 if unknown
132 * @param ttl the time to live of the stream, 0 if not multicast
134 void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
135 const char *dest_addr, const char *dest_type,
139 * Write a packet to another muxer than the one the user originally
140 * intended. Useful when chaining muxers, where one muxer internally
141 * writes a received packet to another muxer.
143 * @param dst the muxer to write the packet to
144 * @param dst_stream the stream index within dst to write the packet to
145 * @param pkt the packet to be written
146 * @param src the muxer the packet originally was intended for
147 * @return the value av_write_frame returned
149 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
150 AVFormatContext *src);
153 * Get the length in bytes which is needed to store val as v.
155 int ff_get_v_length(uint64_t val);
158 * Put val using a variable number of bytes.
160 void ff_put_v(AVIOContext *bc, uint64_t val);
163 * Read a whole line of text from AVIOContext. Stop reading after reaching
164 * either a \n, a \0 or EOF. The returned string is always \0 terminated,
165 * and may be truncated if the buffer is too small.
167 * @param s the read-only AVIOContext
168 * @param buf buffer to store the read line
169 * @param maxlen size of the buffer
170 * @return the length of the string written in the buffer, not including the
173 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
175 #define SPACE_CHARS " \t\r\n"
178 * Callback function type for ff_parse_key_value.
180 * @param key a pointer to the key
181 * @param key_len the number of bytes that belong to the key, including the '='
183 * @param dest return the destination pointer for the value in *dest, may
184 * be null to ignore the value
185 * @param dest_len the length of the *dest buffer
187 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
188 int key_len, char **dest, int *dest_len);
190 * Parse a string with comma-separated key=value pairs. The value strings
191 * may be quoted and may contain escaped characters within quoted strings.
193 * @param str the string to parse
194 * @param callback_get_buf function that returns where to store the
195 * unescaped value string.
196 * @param context the opaque context pointer to pass to callback_get_buf
198 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
202 * Find stream index based on format-specific stream ID
203 * @return stream index, or < 0 on error
205 int ff_find_stream_index(AVFormatContext *s, int id);
208 * Internal version of av_index_search_timestamp
210 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
211 int64_t wanted_timestamp, int flags);
214 * Internal version of av_add_index_entry
216 int ff_add_index_entry(AVIndexEntry **index_entries,
217 int *nb_index_entries,
218 unsigned int *index_entries_allocated_size,
219 int64_t pos, int64_t timestamp, int size, int distance, int flags);
224 * @param s media file handle
225 * @param id unique ID for this chapter
226 * @param start chapter start time in time_base units
227 * @param end chapter end time in time_base units
228 * @param title chapter title
230 * @return AVChapter or NULL on error
232 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
233 int64_t start, int64_t end, const char *title);
236 * Ensure the index uses less memory than the maximum specified in
237 * AVFormatContext.max_index_size by discarding entries if it grows
240 void ff_reduce_index(AVFormatContext *s, int stream_index);
242 #endif /* AVFORMAT_INTERNAL_H */