Statistics
| Branch: | Revision:

ffmpeg / libavformat / internal.h @ f6c7375a

History | View | Annotate | Download (8.27 KB)

1
/*
2
 * copyright (c) 2001 Fabrice Bellard
3
 *
4
 * This file is part of FFmpeg.
5
 *
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.
10
 *
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.
15
 *
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
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
typedef struct AVCodecTag {
30
    enum CodecID id;
31
    unsigned int tag;
32
} AVCodecTag;
33

    
34
void ff_dynarray_add(intptr_t **tab_ptr, int *nb_ptr, intptr_t elem);
35

    
36
#ifdef __GNUC__
37
#define dynarray_add(tab, nb_ptr, elem)\
38
do {\
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);\
43
} while(0)
44
#else
45
#define dynarray_add(tab, nb_ptr, elem)\
46
do {\
47
    ff_dynarray_add((intptr_t **)(tab), nb_ptr, (intptr_t)(elem));\
48
} while(0)
49
#endif
50

    
51
struct tm *brktimegm(time_t secs, struct tm *tm);
52

    
53
char *ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase);
54

    
55
/**
56
 * Parse a string of hexadecimal strings. Any space between the hexadecimal
57
 * digits is ignored.
58
 *
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)
62
 */
63
int ff_hex_to_data(uint8_t *data, const char *p);
64

    
65
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
66

    
67
/**
68
 * Add packet to AVFormatContext->packet_buffer list, determining its
69
 * interleaved position using compare() function argument.
70
 */
71
void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
72
                              int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
73

    
74
void ff_read_frame_flush(AVFormatContext *s);
75

    
76
#define NTP_OFFSET 2208988800ULL
77
#define NTP_OFFSET_US (NTP_OFFSET * 1000000ULL)
78

    
79
/** Get the current time since NTP epoch in microseconds. */
80
uint64_t ff_ntp_time(void);
81

    
82
#if FF_API_URL_SPLIT
83
/**
84
 * @deprecated use av_url_split() instead
85
 */
86
void ff_url_split(char *proto, int proto_size,
87
                  char *authorization, int authorization_size,
88
                  char *hostname, int hostname_size,
89
                  int *port_ptr,
90
                  char *path, int path_size,
91
                  const char *url);
92
#endif
93

    
94
/**
95
 * Assemble a URL string from components. This is the reverse operation
96
 * of av_url_split.
97
 *
98
 * Note, this requires networking to be initialized, so the caller must
99
 * ensure ff_network_init has been called.
100
 *
101
 * @see av_url_split
102
 *
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
114
 */
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, ...);
118

    
119
/**
120
 * Append the media-specific SDP fragment for the media stream c
121
 * to the buffer buff.
122
 *
123
 * Note, the buffer needs to be initialized, since it is appended to
124
 * existing content.
125
 *
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
133
 */
134
void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
135
                        const char *dest_addr, const char *dest_type,
136
                        int port, int ttl);
137

    
138
/**
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.
142
 *
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
148
 */
149
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
150
                     AVFormatContext *src);
151

    
152
/**
153
 * Get the length in bytes which is needed to store val as v.
154
 */
155
int ff_get_v_length(uint64_t val);
156

    
157
/**
158
 * Put val using a variable number of bytes.
159
 */
160
void ff_put_v(ByteIOContext *bc, uint64_t val);
161

    
162
/**
163
 * Read a whole line of text from ByteIOContext. 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.
166
 *
167
 * @param s the read-only ByteIOContext
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
171
 *         final \0
172
 */
173
int ff_get_line(ByteIOContext *s, char *buf, int maxlen);
174

    
175
#define SPACE_CHARS " \t\r\n"
176

    
177
/**
178
 * Callback function type for ff_parse_key_value.
179
 *
180
 * @param key a pointer to the key
181
 * @param key_len the number of bytes that belong to the key, including the '='
182
 *                char
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
186
 */
187
typedef void (*ff_parse_key_val_cb)(void *context, const char *key,
188
                                    int key_len, char **dest, int *dest_len);
189
/**
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.
192
 *
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
197
 */
198
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf,
199
                        void *context);
200

    
201
/**
202
 * Find stream index based on format-specific stream ID
203
 * @return stream index, or < 0 on error
204
 */
205
int ff_find_stream_index(AVFormatContext *s, int id);
206

    
207
/**
208
 * Internal version of av_index_search_timestamp
209
 */
210
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries,
211
                              int64_t wanted_timestamp, int flags);
212

    
213
/**
214
 * Internal version of av_add_index_entry
215
 */
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);
220

    
221
/**
222
 * Add a new chapter.
223
 *
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
229
 *
230
 * @return AVChapter or NULL on error
231
 */
232
AVChapter *ff_new_chapter(AVFormatContext *s, int id, AVRational time_base,
233
                          int64_t start, int64_t end, const char *title);
234

    
235
/**
236
 * Ensure the index uses less memory than the maximum specified in
237
 * AVFormatContext.max_index_size by discarding entries if it grows
238
 * too large.
239
 */
240
void ff_reduce_index(AVFormatContext *s, int stream_index);
241

    
242
#endif /* AVFORMAT_INTERNAL_H */