Libav
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 AVCodecID id;
37  unsigned int tag;
38 } AVCodecTag;
39 
40 typedef struct CodecMime{
41  char str[32];
42  enum AVCodecID id;
43 } CodecMime;
44 
51 };
52 
53 void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
54 
55 #ifdef __GNUC__
56 #define dynarray_add(tab, nb_ptr, elem)\
57 do {\
58  __typeof__(tab) _tab = (tab);\
59  __typeof__(elem) _elem = (elem);\
60  (void)sizeof(**_tab == _elem); /* check that types are compatible */\
61  ff_dynarray_add((intptr_t **)_tab, nb_ptr, (intptr_t)_elem);\
62 } while(0)
63 #else
64 #define dynarray_add(tab, nb_ptr, elem)\
65 do {\
66  ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
67 } while(0)
68 #endif
69 
70 struct tm *ff_brktimegm(time_t secs, struct tm *tm);
71 
72 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
73 
82 int ff_hex_to_data(uint8_t *data, const char *p);
83 
84 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
85 
91  int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
92 
94 
95 #define NTP_OFFSET 2208988800ULL
96 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
97 
99 uint64_t ff_ntp_time(void);
100 
119 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
120  const char *dest_addr, const char *dest_type,
121  int port, int ttl, AVFormatContext *fmt);
122 
134 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
135  AVFormatContext *src);
136 
140 int ff_get_v_length(uint64_t val);
141 
145 void ff_put_v(AVIOContext *bc, uint64_t val);
146 
158 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
159 
160 #define SPACE_CHARS " \t\r\n"
161 
172 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
173  int key_len, char **dest, int *dest_len);
183 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
184  void *context);
185 
190 int ff_find_stream_index(AVFormatContext *s, int id);
191 
195 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
196  int64_t wanted_timestamp, int flags);
197 
201 int ff_add_index_entry(AVIndexEntry **index_entries,
202  int *nb_index_entries,
203  unsigned int *index_entries_allocated_size,
204  int64_t pos, int64_t timestamp, int size, int distance, int flags);
205 
218  int64_t start, int64_t end, const char *title);
219 
225 void ff_reduce_index(AVFormatContext *s, int stream_index);
226 
227 enum AVCodecID ff_guess_image2_codec(const char *filename);
228 
232 int64_t ff_iso8601_to_unix_time(const char *datestr);
233 
241 int ff_seek_frame_binary(AVFormatContext *s, int stream_index,
242  int64_t target_ts, int flags);
243 
252 void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp);
253 
260 int64_t ff_gen_search(AVFormatContext *s, int stream_index,
261  int64_t target_ts, int64_t pos_min,
262  int64_t pos_max, int64_t pos_limit,
263  int64_t ts_min, int64_t ts_max,
264  int flags, int64_t *ts_ret,
265  int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t ));
266 
279 void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits,
280  unsigned int pts_num, unsigned int pts_den);
281 
286 int ff_add_param_change(AVPacket *pkt, int32_t channels,
287  uint64_t channel_layout, int32_t sample_rate,
289 
295 
304 
321  AVPacket *pkt, int flush);
322 
326 void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st,
327  AVCodecParserContext *pc, AVPacket *pkt);
328 
329 int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux);
330 
331 unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id);
332 
333 enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag);
334 
348 enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags);
349 
355 
356 #endif /* AVFORMAT_INTERNAL_H */