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 */