1 | /*
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2 | * RTP definitions
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3 | * Copyright (c) 2002 Fabrice Bellard.
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4 | *
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5 | * This file is part of FFmpeg.
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6 | *
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7 | * FFmpeg is free software; you can redistribute it and/or
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8 | * modify it under the terms of the GNU Lesser General Public
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9 | * License as published by the Free Software Foundation; either
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10 | * version 2.1 of the License, or (at your option) any later version.
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11 | *
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12 | * FFmpeg is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 | * Lesser General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU Lesser General Public
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18 | * License along with FFmpeg; if not, write to the Free Software
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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20 | */
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21 | #ifndef RTP_H
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22 | #define RTP_H
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23 |
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24 | #include "avcodec.h"
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25 | #include "avformat.h"
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26 |
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27 | #define RTP_MIN_PACKET_LENGTH 12
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28 | #define RTP_MAX_PACKET_LENGTH 1500 /* XXX: suppress this define */
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29 |
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30 | int rtp_init(void);
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31 | int rtp_get_codec_info(AVCodecContext *codec, int payload_type);
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32 |
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33 | /** return < 0 if unknown payload type */
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34 | int rtp_get_payload_type(AVCodecContext *codec);
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35 |
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36 | typedef struct RTPDemuxContext RTPDemuxContext;
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37 | typedef struct rtp_payload_data_s rtp_payload_data_s;
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38 | RTPDemuxContext *rtp_parse_open(AVFormatContext *s1, AVStream *st, URLContext *rtpc, int payload_type, rtp_payload_data_s *rtp_payload_data);
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39 | int rtp_parse_packet(RTPDemuxContext *s, AVPacket *pkt,
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40 | const uint8_t *buf, int len);
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41 | void rtp_parse_close(RTPDemuxContext *s);
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42 |
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43 | extern AVOutputFormat rtp_muxer;
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44 | extern AVInputFormat rtp_demuxer;
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45 |
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46 | int rtp_get_local_port(URLContext *h);
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47 | int rtp_set_remote_url(URLContext *h, const char *uri);
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48 | void rtp_get_file_handles(URLContext *h, int *prtp_fd, int *prtcp_fd);
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49 |
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50 | /**
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51 | * some rtp servers assume client is dead if they don't hear from them...
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52 | * so we send a Receiver Report to the provided ByteIO context
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53 | * (we don't have access to the rtcp handle from here)
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54 | */
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55 | int rtp_check_and_send_back_rr(RTPDemuxContext *s, int count);
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56 |
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57 | extern URLProtocol rtp_protocol;
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58 |
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59 | #define RTP_PT_PRIVATE 96
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60 | #define RTP_VERSION 2
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61 | #define RTP_MAX_SDES 256 /**< maximum text length for SDES */
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62 |
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63 | /* RTCP paquets use 0.5 % of the bandwidth */
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64 | #define RTCP_TX_RATIO_NUM 5
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65 | #define RTCP_TX_RATIO_DEN 1000
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66 |
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67 | /** Structure listing useful vars to parse RTP packet payload*/
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68 | typedef struct rtp_payload_data_s
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69 | {
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70 | int sizelength;
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71 | int indexlength;
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72 | int indexdeltalength;
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73 | int profile_level_id;
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74 | int streamtype;
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75 | int objecttype;
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76 | char *mode;
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77 |
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78 | /** mpeg 4 AU headers */
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79 | struct AUHeaders {
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80 | int size;
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81 | int index;
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82 | int cts_flag;
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83 | int cts;
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84 | int dts_flag;
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85 | int dts;
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86 | int rap_flag;
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87 | int streamstate;
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88 | } *au_headers;
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89 | int nb_au_headers;
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90 | int au_headers_length_bytes;
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91 | int cur_au_index;
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92 | } rtp_payload_data_t;
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93 |
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94 | typedef struct AVRtpPayloadType_s
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95 | {
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96 | int pt;
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97 | const char enc_name[50]; /* XXX: why 50 ? */
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98 | enum CodecType codec_type;
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99 | enum CodecID codec_id;
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100 | int clock_rate;
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101 | int audio_channels;
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102 | } AVRtpPayloadType_t;
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103 |
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104 | #if 0
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105 | typedef enum {
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106 | RTCP_SR = 200,
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107 | RTCP_RR = 201,
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108 | RTCP_SDES = 202,
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109 | RTCP_BYE = 203,
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110 | RTCP_APP = 204
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111 | } rtcp_type_t;
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112 |
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113 | typedef enum {
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114 | RTCP_SDES_END = 0,
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115 | RTCP_SDES_CNAME = 1,
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116 | RTCP_SDES_NAME = 2,
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117 | RTCP_SDES_EMAIL = 3,
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118 | RTCP_SDES_PHONE = 4,
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119 | RTCP_SDES_LOC = 5,
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120 | RTCP_SDES_TOOL = 6,
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121 | RTCP_SDES_NOTE = 7,
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122 | RTCP_SDES_PRIV = 8,
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123 | RTCP_SDES_IMG = 9,
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124 | RTCP_SDES_DOOR = 10,
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125 | RTCP_SDES_SOURCE = 11
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126 | } rtcp_sdes_type_t;
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127 | #endif
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128 |
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129 | extern AVRtpPayloadType_t AVRtpPayloadTypes[];
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130 | #endif /* RTP_H */
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