internal.h
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1 /*
2  * copyright (c) 2001 Fabrice Bellard
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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.
10  *
11  * Libav 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.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFORMAT_INTERNAL_H
22 #define AVFORMAT_INTERNAL_H
23 
24 #include <stdint.h>
25 #include "avformat.h"
26 
27 #define MAX_URL_SIZE 4096
28 
29 #ifdef DEBUG
30 # define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
31 #else
32 # define hex_dump_debug(class, buf, size)
33 #endif
34 
35 typedef struct AVCodecTag {
36  enum CodecID id;
37  unsigned int tag;
38 } AVCodecTag;
39 
40 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
41 
42 #ifdef __GNUC__
43 #define dynarray_add(tab, nb_ptr, elem)\
44 do {\
45  __typeof__(tab) _tab = (tab);\
46  __typeof__(elem) _elem = (elem);\
47  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
48  ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
49 } while(0)
50 #else
51 #define dynarray_add(tab, nb_ptr, elem)\
52 do {\
53  ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
54 } while(0)
55 #endif
56 
57 struct tm *brktimegm(time_t secs, struct tm *tm);
58 
59 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
60 
69 int ff_hex_to_data(uint8_t *data, const char *p);
70 
71 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
72 
78  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
79 
81 
82 #define NTP_OFFSET 2208988800ULL
83 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
84 
86 uint64_t ff_ntp_time(void);
87 
109 int ff_url_join(char *str, int size, const char *proto,
110  const char *authorization, const char *hostname,
111  int port, const char *fmt, ...) av_printf_format(7, 8);
112 
130 void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
131  const char *dest_addr, const char *dest_type,
132  int port, int ttl, AVFormatContext *fmt);
133 
145 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
146  AVFormatContext *src);
147 
151 int ff_get_v_length(uint64_t val);
152 
156 void ff_put_v(AVIOContext *bc, uint64_t val);
157 
169 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
170 
171 #define SPACE_CHARS " \t\r\n"
172 
183 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
184  int key_len, char **dest, int *dest_len);
194 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
195  void *context);
196 
201 int ff_find_stream_index(AVFormatContext *s, int id);
202 
206 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
207  int64_t wanted_timestamp, int flags);
208 
212 int ff_add_index_entry(AVIndexEntry **index_entries,
213  int *nb_index_entries,
214  unsigned int *index_entries_allocated_size,
215  int64_t pos, int64_t timestamp, int size, int distance, int flags);
216 
229  int64_t start, int64_t end, const char *title);
230 
236 void ff_reduce_index(AVFormatContext *s, int stream_index);
237 
238 /*
239  * Convert a relative url into an absolute url, given a base url.
240  *
241  * @param buf the buffer where output absolute url is written
242  * @param size the size of buf
243  * @param base the base url, may be equal to buf.
244  * @param rel the new url, which is interpreted relative to base
245  */
246 void ff_make_absolute_url(char *buf, int size, const char *base,
247  const char *rel);
248 
249 enum CodecID ff_guess_image2_codec(const char *filename);
250 
254 int64_t ff_iso8601_to_unix_time(const char *datestr);
255 
263 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
264  int64_t target_ts, int flags);
265 
274 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
275 
282 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
283  int64_t target_ts, int64_t pos_min,
284  int64_t pos_max, int64_t pos_limit,
285  int64_t ts_min, int64_t ts_max,
286  int flags, int64_t *ts_ret,
287  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
288 
299 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
300  unsigned int pts_num, unsigned int pts_den);
301 
306 int ff_add_param_change(AVPacket *pkt, int32_t channels,
307  uint64_t channel_layout, int32_t sample_rate,
308  int32_t width, int32_t height);
309 
310 #endif /* AVFORMAT_INTERNAL_H */