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libavformat/internal.h

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00001 /*
00002  * copyright (c) 2001 Fabrice Bellard
00003  *
00004  * This file is part of FFmpeg.
00005  *
00006  * FFmpeg is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public
00008  * License as published by the Free Software Foundation; either
00009  * version 2.1 of the License, or (at your option) any later version.
00010  *
00011  * FFmpeg is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with FFmpeg; if not, write to the Free Software
00018  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00019  */
00020 
00021 #ifndef AVFORMAT_INTERNAL_H
00022 #define AVFORMAT_INTERNAL_H
00023 
00024 #include <stdint.h>
00025 #include "avformat.h"
00026 
00027 #define MAX_URL_SIZE 4096
00028 
00029 #ifdef DEBUG
00030 #    define hex_dump_debug(class, buf, size) av_hex_dump_log(class, AV_LOG_DEBUG, buf, size)
00031 #else
00032 #    define hex_dump_debug(class, buf, size)
00033 #endif
00034 
00035 typedef struct AVCodecTag {
00036     enum CodecID id;
00037     unsigned int tag;
00038 } AVCodecTag;
00039 
00040 #ifdef __GNUC__
00041 #define dynarray_add(tab, nb_ptr, elem)\
00042 do {\
00043     __typeof__(tab) _tab = (tab);\
00044     __typeof__(elem) _elem = (elem);\
00045     (void)sizeof(**_tab == _elem); /* check that types are compatible */\
00046     av_dynarray_add(_tab, nb_ptr, _elem);\
00047 } while(0)
00048 #else
00049 #define dynarray_add(tab, nb_ptr, elem)\
00050 do {\
00051     av_dynarray_add((tab), nb_ptr, (elem));\
00052 } while(0)
00053 #endif
00054 
00055 struct tm *brktimegm(time_t secs, struct tm *tm);
00056 
00057 char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
00058 
00067 int ff_hex_to_data(uint8_t *data, const char *p);
00068 
00069 void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
00070 
00075 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
00076                               int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
00077 
00078 void ff_read_frame_flush(AVFormatContext *s);
00079 
00080 #define NTP_OFFSET 2208988800ULL
00081 #define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
00082 
00084 uint64_t ff_ntp_time(void);
00085 
00086 #if FF_API_URL_SPLIT
00087 
00090 void ff_url_split(char *proto, int proto_size,
00091                   char *authorization, int authorization_size,
00092                   char *hostname, int hostname_size,
00093                   int *port_ptr,
00094                   char *path, int path_size,
00095                   const char *url);
00096 #endif
00097 
00119 int ff_url_join(char *str, int size, const char *proto,
00120                 const char *authorization, const char *hostname,
00121                 int port, const char *fmt, ...);
00122 
00140 void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
00141                         const char *dest_addr, const char *dest_type,
00142                         int port, int ttl, AVFormatContext *fmt);
00143 
00155 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
00156                      AVFormatContext *src);
00157 
00161 int ff_get_v_length(uint64_t val);
00162 
00166 void ff_put_v(AVIOContext *bc, uint64_t val);
00167 
00179 int ff_get_line(AVIOContext *s, char *buf, int maxlen);
00180 
00181 #define SPACE_CHARS " \t\r\n"
00182 
00193 typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
00194                                     int key_len, char **dest, int *dest_len);
00204 void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
00205                         void *context);
00206 
00211 int ff_find_stream_index(AVFormatContext *s, int id);
00212 
00216 int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
00217                               int64_t wanted_timestamp, int flags);
00218 
00222 int ff_add_index_entry(AVIndexEntry **index_entries,
00223                        int *nb_index_entries,
00224                        unsigned int *index_entries_allocated_size,
00225                        int64_t pos, int64_t timestamp, int size, int distance, int flags);
00226 
00238 AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
00239                           int64_t start, int64_t end, const char *title);
00240 
00246 void ff_reduce_index(AVFormatContext *s, int stream_index);
00247 
00248 /*
00249  * Convert a relative url into an absolute url, given a base url.
00250  *
00251  * @param buf the buffer where output absolute url is written
00252  * @param size the size of buf
00253  * @param base the base url, may be equal to buf.
00254  * @param rel the new url, which is interpreted relative to base
00255  */
00256 void ff_make_absolute_url(char *buf, int size, const char *base,
00257                           const char *rel);
00258 
00259 enum CodecID ff_guess_image2_codec(const char *filename);
00260 
00261 #endif /* AVFORMAT_INTERNAL_H */

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