Statistics
| Branch: | Revision:

ffmpeg / libavformat / rdt.h @ accc248f

History | View | Annotate | Download (3.28 KB)

1
/*
2
 * Realmedia RTSP (RDT) definitions
3
 * Copyright (c) 2007 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
16
 *
17
 * You should have received a copy of the GNU Lesser General Public
18
 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
#ifndef AVFORMAT_RDT_H
23
#define AVFORMAT_RDT_H
24

    
25
typedef struct RDTDemuxContext RDTDemuxContext;
26

    
27
RDTDemuxContext *ff_rdt_parse_open(AVFormatContext *ic, AVStream *st,
28
                                   void *priv_data,
29
                                   RTPDynamicProtocolHandler *handler);
30
void ff_rdt_parse_close(RDTDemuxContext *s);
31

    
32
/**
33
 * Calculate the response (RealChallenge2 in the RTSP header) to the
34
 * challenge (RealChallenge1 in the RTSP header from the Real/Helix
35
 * server), which is used as some sort of client validation.
36
 *
37
 * @param response pointer to response buffer, it should be at least 41 bytes
38
 *                 (40 data + 1 zero) bytes long.
39
 * @param chksum pointer to buffer containing a checksum of the response,
40
 *               it should be at least 9 (8 data + 1 zero) bytes long.
41
 * @param challenge pointer to the RealChallenge1 value provided by the
42
 *                  server.
43
 */
44
void ff_rdt_calc_response_and_checksum(char response[41], char chksum[9],
45
                                       const char *challenge);
46

    
47
/**
48
 * Register RDT-related dynamic payload handlers with our cache.
49
 */
50
void av_register_rdt_dynamic_payload_handlers(void);
51

    
52
/**
53
 * Add subscription information to Subscribe parameter string.
54
 *
55
 * @param cmd string to write the subscription information into.
56
 * @param size size of cmd.
57
 * @param stream_nr stream number.
58
 * @param rule_nr rule number to conform to.
59
 */
60
void ff_rdt_subscribe_rule(char *cmd, int size,
61
                           int stream_nr, int rule_nr);
62
// FIXME this will be removed ASAP
63
void ff_rdt_subscribe_rule2(RDTDemuxContext *s, char *cmd, int size,
64
                            int stream_nr, int rule_nr);
65

    
66
/**
67
 * Parse RDT-style packet header.
68
 *
69
 * @param buf input buffer
70
 * @param len length of input buffer
71
 * @param sn will be set to the stream number this packet belongs to
72
 * @param seq will be set to the sequence number this packet belongs to
73
 * @param rn will be set to the rule number this packet belongs to
74
 * @param ts will be set to the timestamp of the packet
75
 * @return the amount of bytes consumed, or <0 on error
76
 */
77
int ff_rdt_parse_header(const uint8_t *buf, int len,
78
                        int *sn, int *seq, int *rn, uint32_t *ts);
79

    
80
/**
81
 * Parse RDT-style packet data (header + media data).
82
 * Usage similar to rtp_parse_packet().
83
 */
84
int ff_rdt_parse_packet(RDTDemuxContext *s, AVPacket *pkt,
85
                        const uint8_t *buf, int len);
86

    
87
#endif /* AVFORMAT_RDT_H */