Statistics
| Branch: | Revision:

ffmpeg / libavformat / rtp.h @ b156b88c

History | View | Annotate | Download (3.48 KB)

1
/*
2
 * RTP definitions
3
 * Copyright (c) 2002 Fabrice Bellard.
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
#ifndef RTP_H
22
#define RTP_H
23

    
24
#include "avcodec.h"
25
#include "avformat.h"
26

    
27
#define RTP_MIN_PACKET_LENGTH 12
28
#define RTP_MAX_PACKET_LENGTH 1500 /* XXX: suppress this define */
29

    
30
int rtp_init(void);
31
int rtp_get_codec_info(AVCodecContext *codec, int payload_type);
32

    
33
/** return < 0 if unknown payload type */
34
int rtp_get_payload_type(AVCodecContext *codec);
35

    
36
typedef struct RTPDemuxContext RTPDemuxContext;
37
typedef struct rtp_payload_data_s rtp_payload_data_s;
38
RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, rtp_payload_data_s *rtp_payload_data);
39
int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
40
                     const uint8_t *buf, int len);
41
void rtp_parse_close(RTPDemuxContext *s);
42

    
43
int rtp_get_local_port(URLContext *h);
44
int rtp_set_remote_url(URLContext *h, const char *uri);
45
void rtp_get_file_handles(URLContext *h, int *prtp_fd, int *prtcp_fd);
46

    
47
/**
48
 * some rtp servers assume client is dead if they don't hear from them...
49
 * so we send a Receiver Report to the provided ByteIO context
50
 * (we don't have access to the rtcp handle from here)
51
 */
52
int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count);
53

    
54
#define RTP_PT_PRIVATE 96
55
#define RTP_VERSION 2
56
#define RTP_MAX_SDES 256   /**< maximum text length for SDES */
57

    
58
/* RTCP paquets use 0.5 % of the bandwidth */
59
#define RTCP_TX_RATIO_NUM 5
60
#define RTCP_TX_RATIO_DEN 1000
61

    
62
/** Structure listing useful vars to parse RTP packet payload*/
63
typedef struct rtp_payload_data_s
64
{
65
    int sizelength;
66
    int indexlength;
67
    int indexdeltalength;
68
    int profile_level_id;
69
    int streamtype;
70
    int objecttype;
71
    char *mode;
72

    
73
    /** mpeg 4 AU headers */
74
    struct AUHeaders {
75
        int size;
76
        int index;
77
        int cts_flag;
78
        int cts;
79
        int dts_flag;
80
        int dts;
81
        int rap_flag;
82
        int streamstate;
83
    } *au_headers;
84
    int nb_au_headers;
85
    int au_headers_length_bytes;
86
    int cur_au_index;
87
} rtp_payload_data_t;
88

    
89
typedef struct AVRtpPayloadType_s
90
{
91
    int pt;
92
    const char enc_name[50]; /* XXX: why 50 ? */
93
    enum CodecType codec_type;
94
    enum CodecID codec_id;
95
    int clock_rate;
96
    int audio_channels;
97
} AVRtpPayloadType_t;
98

    
99
#if 0
100
typedef enum {
101
  RTCP_SR   = 200,
102
  RTCP_RR   = 201,
103
  RTCP_SDES = 202,
104
  RTCP_BYE  = 203,
105
  RTCP_APP  = 204
106
} rtcp_type_t;
107

108
typedef enum {
109
  RTCP_SDES_END    =  0,
110
  RTCP_SDES_CNAME  =  1,
111
  RTCP_SDES_NAME   =  2,
112
  RTCP_SDES_EMAIL  =  3,
113
  RTCP_SDES_PHONE  =  4,
114
  RTCP_SDES_LOC    =  5,
115
  RTCP_SDES_TOOL   =  6,
116
  RTCP_SDES_NOTE   =  7,
117
  RTCP_SDES_PRIV   =  8,
118
  RTCP_SDES_IMG    =  9,
119
  RTCP_SDES_DOOR   = 10,
120
  RTCP_SDES_SOURCE = 11
121
} rtcp_sdes_type_t;
122
#endif
123

    
124
extern AVRtpPayloadType_t AVRtpPayloadTypes[];
125
#endif /* RTP_H */