Move the probe loop from av_open_input_file() into its own method
[libav.git] / libavformat / internal.h
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 char *ff_data_to_hex(char *buf, const uint8_t *src, int size);
28
29 void av_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx);
30
31 /**
32 * Add packet to AVFormatContext->packet_buffer list, determining its
33 * interleaved position using compare() function argument.
34 */
35 void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
36 int (*compare)(AVFormatContext *, AVPacket *, AVPacket *));
37
38 void av_read_frame_flush(AVFormatContext *s);
39
40 /** Gets the current time since NTP epoch in microseconds. */
41 uint64_t ff_ntp_time(void);
42
43 /**
44 * Probes a bytestream to determine the input format. Each time a probe returns
45 * with a score that is too low, the probe buffer size is increased and another
46 * attempt is made. When the maximum probe size is reached, the input format
47 * with the highest score is returned.
48 *
49 * @param pb the bytestream to probe, it may be closed and opened again
50 * @param fmt the input format is put here
51 * @param filename the filename of the stream
52 * @param logctx the log context
53 * @param offset the offset within the bytestream to probe from
54 * @param max_probe_size the maximum probe buffer size (zero for default)
55 * @return 0 in case of success, a negative value corresponding to an
56 * AVERROR code otherwise
57 */
58 int ff_probe_input_buffer(ByteIOContext **pb, AVInputFormat **fmt,
59 const char *filename, void *logctx,
60 unsigned int offset, unsigned int max_probe_size);
61
62 #endif /* AVFORMAT_INTERNAL_H */