36affed42041f98aaf8f5578ecb4bbc815567527
[libav.git] / libavformat / rtp.h
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 FFMPEG_RTP_H
22 #define FFMPEG_RTP_H
23
24 #include "libavcodec/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_get_codec_info(AVCodecContext *codec, int payload_type);
31
32 /** return < 0 if unknown payload type */
33 int rtp_get_payload_type(AVCodecContext *codec);
34
35 typedef struct RTPDemuxContext RTPDemuxContext;
36 typedef struct rtp_payload_data_s rtp_payload_data_s;
37 RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, rtp_payload_data_s *rtp_payload_data);
38 int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
39 const uint8_t *buf, int len);
40 void rtp_parse_close(RTPDemuxContext *s);
41
42 int rtp_get_local_port(URLContext *h);
43 int rtp_set_remote_url(URLContext *h, const char *uri);
44 void rtp_get_file_handles(URLContext *h, int *prtp_fd, int *prtcp_fd);
45
46 /**
47 * some rtp servers assume client is dead if they don't hear from them...
48 * so we send a Receiver Report to the provided ByteIO context
49 * (we don't have access to the rtcp handle from here)
50 */
51 int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count);
52
53 #define RTP_PT_PRIVATE 96
54 #define RTP_VERSION 2
55 #define RTP_MAX_SDES 256 /**< maximum text length for SDES */
56
57 /* RTCP paquets use 0.5 % of the bandwidth */
58 #define RTCP_TX_RATIO_NUM 5
59 #define RTCP_TX_RATIO_DEN 1000
60
61 /** Structure listing useful vars to parse RTP packet payload*/
62 typedef struct rtp_payload_data_s
63 {
64 int sizelength;
65 int indexlength;
66 int indexdeltalength;
67 int profile_level_id;
68 int streamtype;
69 int objecttype;
70 char *mode;
71
72 /** mpeg 4 AU headers */
73 struct AUHeaders {
74 int size;
75 int index;
76 int cts_flag;
77 int cts;
78 int dts_flag;
79 int dts;
80 int rap_flag;
81 int streamstate;
82 } *au_headers;
83 int nb_au_headers;
84 int au_headers_length_bytes;
85 int cur_au_index;
86 } rtp_payload_data_t;
87
88 #if 0
89 typedef enum {
90 RTCP_SR = 200,
91 RTCP_RR = 201,
92 RTCP_SDES = 202,
93 RTCP_BYE = 203,
94 RTCP_APP = 204
95 } rtcp_type_t;
96
97 typedef enum {
98 RTCP_SDES_END = 0,
99 RTCP_SDES_CNAME = 1,
100 RTCP_SDES_NAME = 2,
101 RTCP_SDES_EMAIL = 3,
102 RTCP_SDES_PHONE = 4,
103 RTCP_SDES_LOC = 5,
104 RTCP_SDES_TOOL = 6,
105 RTCP_SDES_NOTE = 7,
106 RTCP_SDES_PRIV = 8,
107 RTCP_SDES_IMG = 9,
108 RTCP_SDES_DOOR = 10,
109 RTCP_SDES_SOURCE = 11
110 } rtcp_sdes_type_t;
111 #endif
112
113 #endif /* FFMPEG_RTP_H */