| 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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