public void ValidateSctpParameters(SctpParameters params_)
{
}
public AnswerMediaSection(
IceParameters iceParameters,
IceCandidate[] iceCandidates,
DtlsParameters dtlsParameters,
SctpParameters sctpParameters,
PlainRtpParameters plainRtpParameters,
bool planB,
MediaObject offerMediaObject,
RtpParameters offerRtpParameters,
RtpParameters answerRtpParameters,
ProducerCodecOptions codecOptions,
bool extmapAllowMixed) : base(iceParameters, iceCandidates, dtlsParameters, planB)
{
_mediaObject.MediaDescription.Attributes.Mid = offerMediaObject.MediaDescription.Attributes.Mid;
_mediaObject.MediaDescription.Media = offerMediaObject.MediaDescription.Media;
_mediaObject.MediaDescription.Proto = offerMediaObject.MediaDescription.Proto;
if (plainRtpParameters is null)
{
_mediaObject.MediaDescription.ConnectionData = new ConnectionData
{
NetType = NetType.Internet,
AddrType = AddrType.Ip4,
ConnectionAddress = "127.0.0.1"
};
_mediaObject.MediaDescription.Port = 7;
}
else
{
_mediaObject.MediaDescription.ConnectionData = new ConnectionData
{
NetType = NetType.Internet,
AddrType = plainRtpParameters.IpVersion,
ConnectionAddress = plainRtpParameters.Ip
};
_mediaObject.MediaDescription.Port = plainRtpParameters.Port;
}
switch (offerMediaObject.MediaDescription.Media)
{
case MediaType.Audio:
case MediaType.Video:
{
_mediaObject.MediaDescription.Attributes.RecvOnly = true;
_mediaObject.MediaDescription.Attributes.Rtpmaps = new List <Rtpmap>();
_mediaObject.MediaDescription.Attributes.RtcpFbs = new List <RtcpFb>();
_mediaObject.MediaDescription.Attributes.Fmtps = new List <Fmtp>();
foreach (var codec in answerRtpParameters.Codecs)
{
var xxx = codec;
Rtpmap rtpmap = new()
{
PayloadType = codec.PayloadType,
EncodingName = GetCodecName(codec),
ClockRate = codec.ClockRate,
Channels = codec.Channels > 1 ? codec.Channels : null
};
_mediaObject.MediaDescription.Attributes.Rtpmaps.Add(rtpmap);
var codecParameters = Utils.Clone(codec.Parameters, new Dictionary <string, object>()
{
});
if (codecOptions is not null)
{
var offerCodec = offerRtpParameters.Codecs
.First(c => c.PayloadType == codec.PayloadType);
switch (codec.MimeType.ToLower())
{
case "audio/opus":
{
if (codecOptions.OpusStereo.HasValue)
{
offerCodec.Parameters["sprop-stereo"] =
codecOptions.OpusStereo == true ? 1 : 0;
codecParameters["stereo"] =
codecOptions.OpusStereo == true ? 1 : 0;
}
if (codecOptions.OpusFec.HasValue)
{
offerCodec.Parameters["useinbandfec"] =
codecOptions.OpusFec == true ? 1 : 0;
codecParameters["useinbandfec"] =
codecOptions.OpusFec == true ? 1 : 0;
}
if (codecOptions.OpusDtx.HasValue)
{
offerCodec.Parameters["usedtx"] =
codecOptions.OpusDtx == true ? 1 : 0;
codecParameters["usedtx"] =
codecOptions.OpusDtx == true ? 1 : 0;
}
if (codecOptions.OpusMaxPlaybackRate.HasValue)
{
codecParameters["maxplaybackrate"] =
codecOptions.OpusMaxPlaybackRate;
}
if (codecOptions.OpusMaxAverageBitrate.HasValue)
{
codecParameters["maxaveragebitrate"] =
codecOptions.OpusMaxAverageBitrate;
}
if (codecOptions.OpusPtime.HasValue)
{
codecParameters["ptime"] =
codecOptions.OpusPtime;
}
}
break;
case "video/vp8":
case "video/vp9":
case "video/h264":
case "video/h265":
{
if (codecOptions.VideoGoogleStartBitrate.HasValue)
{
codecParameters["x-google-start-bitrate"] =
codecOptions.VideoGoogleStartBitrate;
}
if (codecOptions.VideoGoogleMaxBitrate.HasValue)
{
codecParameters["x-google-max-bitrate"] =
codecOptions.VideoGoogleMaxBitrate;
}
if (codecOptions.VideoGoogleMinBitrate.HasValue)
{
codecParameters["x-google-min-bitrate"] =
codecOptions.VideoGoogleMinBitrate;
}
}
break;
}
}
Fmtp fmtp = codecParameters.ToFmtp(codec.PayloadType);
if (!string.IsNullOrEmpty(fmtp.Value))
{
_mediaObject.MediaDescription.Attributes.Fmtps.Add(fmtp);
}
foreach (var fb in codec.RtcpFeedback)
{
RtcpFb rtcpFb = new()
{
PayloadType = codec.PayloadType,
Type = fb.Type,
SubType = fb.Parameter
};
_mediaObject.MediaDescription.Attributes.RtcpFbs.Add(rtcpFb);
}
}
_mediaObject.MediaDescription.Fmts ??= new List <string>();
((List <string>)_mediaObject.MediaDescription.Fmts).AddRange(answerRtpParameters.Codecs
.Select(codec => codec.PayloadType.ToString()));
_mediaObject.MediaDescription.Attributes.Extmaps = new List <Extmap>();
foreach (var headerExtension in answerRtpParameters.HeaderExtensions)
{
// Don't add a header extension if not present in the offer.
var found = offerMediaObject.MediaDescription.Attributes.Extmaps
.Any(localExt => localExt.Uri.ToString() == headerExtension.Uri);
if (!found)
{
continue;
}
Extmap ext = new()
{
Uri = new Uri(headerExtension.Uri),
Value = headerExtension.Id
};
_mediaObject.MediaDescription.Attributes.Extmaps.Add(ext);
}
// Allow both 1 byte and 2 bytes length header extensions.
if (extmapAllowMixed && offerMediaObject.MediaDescription.Attributes.ExtmapAllowMixed.HasValue &&
offerMediaObject.MediaDescription.Attributes.ExtmapAllowMixed == true)
{
_mediaObject.MediaDescription.Attributes.ExtmapAllowMixed = true;
}
// Simulcast.
//// DEBUG HACK
if (offerMediaObject.MediaDescription.Media == MediaType.Video)
{
Console.WriteLine("PUT A BP HERE...");
}
if (offerMediaObject.MediaDescription.Attributes.Simulcast is not null)
{
_mediaObject.MediaDescription.Attributes.Simulcast = new()
{
Direction = RidDirection.Recv,
IdList = offerMediaObject.MediaDescription.Attributes.Simulcast.IdList
};
_mediaObject.MediaDescription.Attributes.Rids = new List <Rid>();
foreach (var rid in offerMediaObject.MediaDescription.Attributes.Rids)
{
if (rid.Direction != RidDirection.Send)
{
continue;
}
_mediaObject.MediaDescription.Attributes.Rids.Add(new Rid
{
Id = rid.Id,
Direction = RidDirection.Recv
});
}
}
// Simulcast (draft version 03).
else if (offerMediaObject.Simulcast03 is not null)
{
_mediaObject.Simulcast03 = new()
{
Value = offerMediaObject.Simulcast03.Value.Replace(RidDirection.Send.DisplayName(),
RidDirection.Recv.DisplayName())
};
_mediaObject.MediaDescription.Attributes.Rids = new List <Rid>();
foreach (var rid in offerMediaObject.MediaDescription.Attributes.Rids)
{
if (rid.Direction != RidDirection.Send)
{
continue;
}
_mediaObject.MediaDescription.Attributes.Rids.Add(new Rid
{
Id = rid.Id,
Direction = RidDirection.Recv
});
}
}
_mediaObject.MediaDescription.Attributes.RtcpMux = true;
_mediaObject.MediaDescription.Attributes.RtcpRsize = true;
if (_planB && _mediaObject.MediaDescription.Media == MediaType.Video)
{
_mediaObject.XGoogleFlag = "conference";
}
break;
}
case MediaType.Application:
{
// New spec.
if (offerMediaObject.MediaDescription.Attributes.SctpPort.Port.GetType() == typeof(int))
{
_mediaObject.MediaDescription.Fmts = new List <string> {
"webrtc-datachannel"
};
_mediaObject.MediaDescription.Attributes.SctpPort = new SctpPort
{
Port = sctpParameters.Port
};
_mediaObject.MediaDescription.Attributes.MaxMessageSize = new MaxMessageSize
{
Size = sctpParameters.MaxMessageSize
};
}
// Old spec.
else if (offerMediaObject.SctpMap is not null)
{
_mediaObject.MediaDescription.Fmts = new List <string> {
sctpParameters.Port.ToString()
};
_mediaObject.SctpMap = new()
{
App = "webrtc-datachannel",
SctpMapNumber = sctpParameters.Port,
MaxMessageSize = sctpParameters.MaxMessageSize
};
}
break;
}
}
}
//readonly SctpParameters _sctpParameters;
//readonly PlainRtpParameters _plainRtpParameters;
//readonly Mid _mid;
//readonly MediaKind _kind;
//RtpParameters
public OfferMediaSection(
IceParameters iceParameters,
IceCandidate[] iceCandidates,
DtlsParameters dtlsParameters,
SctpParameters sctpParameters,
PlainRtpParameters plainRtpParameters,
bool planB,
Mid mid,
MediaKind kind,
RtpParameters offerRtpParameters,
string streamId,
string trackId,
bool oldDataChannelSpec) : base(iceParameters, iceCandidates, dtlsParameters, planB)
{
_mediaObject.MediaDescription.Attributes.Mid = mid;
_mediaObject.MediaDescription.Media = kind.ToSdp();
if (plainRtpParameters is null)
{
_mediaObject.MediaDescription.ConnectionData = new ConnectionData
{
NetType = NetType.Internet,
AddrType = AddrType.Ip4,
ConnectionAddress = "127.0.0.1"
};
if (sctpParameters is null)
{
_mediaObject.MediaDescription.Proto = "UDP/TLS/RTP/SAVPF";
}
else
{
_mediaObject.MediaDescription.Proto = "UDP/DTLS/SCTP";
}
_mediaObject.MediaDescription.Port = 7;
}
else
{
_mediaObject.MediaDescription.ConnectionData = new ConnectionData
{
NetType = NetType.Internet,
AddrType = plainRtpParameters.IpVersion,
ConnectionAddress = plainRtpParameters.Ip
};
_mediaObject.MediaDescription.Proto = "RTP/AVP";
_mediaObject.MediaDescription.Port = plainRtpParameters.Port;
}
switch (kind)
{
case MediaKind.Audio:
case MediaKind.Video:
{
_mediaObject.MediaDescription.Attributes.SendOnly = true;
_mediaObject.MediaDescription.Attributes.Rtpmaps = new List <Rtpmap>();
_mediaObject.MediaDescription.Attributes.RtcpFbs = new List <RtcpFb>();
_mediaObject.MediaDescription.Attributes.Fmtps = new List <Fmtp>();
if (!_planB)
{
_mediaObject.MediaDescription.Attributes.Msid = new()
{
Id = streamId ?? "-",
AppData = trackId
}
}
;
foreach (var codec in offerRtpParameters.Codecs)
{
Rtpmap rtpmap = new()
{
PayloadType = codec.PayloadType,
EncodingName = GetCodecName(codec),
ClockRate = codec.ClockRate,
Channels = codec.Channels > 1 ? codec.Channels : null
};
_mediaObject.MediaDescription.Attributes.Rtpmaps.Add(rtpmap);
Fmtp fmtp = codec.Parameters.ToFmtp(codec.PayloadType);
if (!string.IsNullOrEmpty(fmtp.Value))
{
_mediaObject.MediaDescription.Attributes.Fmtps.Add(fmtp);
}
foreach (var fb in codec.RtcpFeedback)
{
RtcpFb rtcpFb = new()
{
PayloadType = codec.PayloadType,
Type = fb.Type,
SubType = fb.Parameter
};
_mediaObject.MediaDescription.Attributes.RtcpFbs.Add(rtcpFb);
}
}
_mediaObject.MediaDescription.Fmts ??= new List <string>();
((List <string>)_mediaObject.MediaDescription.Fmts).AddRange(offerRtpParameters.Codecs
.Select(codec => codec.PayloadType.ToString()));
_mediaObject.MediaDescription.Attributes.Extmaps = new List <Extmap>();
foreach (var headerExtension in offerRtpParameters.HeaderExtensions)
{
Extmap ext = new()
{
Uri = new Uri(headerExtension.Uri),
Value = headerExtension.Id
};
_mediaObject.MediaDescription.Attributes.Extmaps.Add(ext);
}
_mediaObject.MediaDescription.Attributes.RtcpMux = true;
_mediaObject.MediaDescription.Attributes.RtcpRsize = true;
var encoding = offerRtpParameters.Encodings[0];
var ssrc = encoding.Ssrc;
var rtxSsrc = (encoding.Rtx is not null && encoding.Rtx.Ssrc.HasValue) ?
encoding.Rtx.Ssrc : null;
_mediaObject.MediaDescription.Attributes.Ssrcs = new List <Ssrc>();
_mediaObject.MediaDescription.Attributes.SsrcGroups = new List <SsrcGroup>();
if (offerRtpParameters.Rtcp.Cname is not null)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)ssrc,
Attribute = "cname",
Value = offerRtpParameters.Rtcp.Cname
});
}
if (_planB)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)ssrc,
Attribute = "msid",
Value = $"{streamId ?? "-"} {trackId}"
});
}
if (rtxSsrc.HasValue)
{
if (offerRtpParameters.Rtcp.Cname is not null)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)rtxSsrc,
Attribute = "cname",
Value = offerRtpParameters.Rtcp.Cname
});
}
if (_planB)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)rtxSsrc,
Attribute = "msid",
Value = $"{streamId ?? "-"} {trackId}"
});
}
// Associate original and retransmission SSRCs.
_mediaObject.MediaDescription.Attributes.SsrcGroups.Add(new SsrcGroup
{
Semantics = "FID",
SsrcIds = new string[] { $"{ssrc} {rtxSsrc}" }
});
}
break;
}
case MediaKind.Application:
{
// New spec.
if (!oldDataChannelSpec)
{
_mediaObject.MediaDescription.Fmts = new List <string> {
"webrtc-datachannel"
};
_mediaObject.MediaDescription.Attributes.SctpPort = new SctpPort
{
Port = sctpParameters.Port
};
_mediaObject.MediaDescription.Attributes.MaxMessageSize = new MaxMessageSize
{
Size = sctpParameters.MaxMessageSize
};
}
// Old spec.
else
{
_mediaObject.MediaDescription.Fmts = new List <string> {
sctpParameters.Port.ToString()
};
_mediaObject.SctpMap = new()
{
App = "webrtc-datachannel",
SctpMapNumber = sctpParameters.Port,
MaxMessageSize = sctpParameters.MaxMessageSize
};
}
break;
}
}
}
void PlanBReceive(RtpParameters offerRtpParameters, string streamId, IMediaStream trackId)
{
var encoding = offerRtpParameters.Encodings[0];
var ssrc = encoding.Ssrc;
var rtxSsrc = (encoding.Rtx is not null && encoding.Rtx.Ssrc.HasValue) ?
encoding.Rtx.Ssrc : null;
var payloads = _mediaObject.MediaDescription.Fmts.ToArray();
foreach (var codec in offerRtpParameters.Codecs)
{
if (payloads.Any(payload => payload.Contains(codec.PayloadType.ToString())))
{
continue;
}
Rtpmap rtpmap = new()
{
PayloadType = codec.PayloadType,
EncodingName = GetCodecName(codec),
ClockRate = codec.ClockRate,
Channels = codec.Channels > 1 ? codec.Channels : null
};
_mediaObject.MediaDescription.Attributes.Rtpmaps.Add(rtpmap);
Fmtp fmtp = codec.Parameters.ToFmtp(codec.PayloadType);
if (!string.IsNullOrEmpty(fmtp.Value))
{
_mediaObject.MediaDescription.Attributes.Fmtps.Add(fmtp);
}
foreach (var fb in codec.RtcpFeedback)
{
RtcpFb rtcpFb = new()
{
PayloadType = codec.PayloadType,
Type = fb.Type,
SubType = fb.Parameter
};
_mediaObject.MediaDescription.Attributes.RtcpFbs.Add(rtcpFb);
}
}
((List <string>)_mediaObject.MediaDescription.Fmts).AddRange(offerRtpParameters.Codecs
.Select(codec => codec.PayloadType.ToString()));
if (offerRtpParameters.Rtcp.Cname is not null)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)ssrc,
Attribute = "cname",
Value = offerRtpParameters.Rtcp.Cname
});
}
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)ssrc,
Attribute = "msid",
Value = $"{streamId ?? "-"} {trackId}"
});
if (rtxSsrc.HasValue)
{
if (offerRtpParameters.Rtcp.Cname is not null)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)rtxSsrc,
Attribute = "cname",
Value = offerRtpParameters.Rtcp.Cname
});
}
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)rtxSsrc,
Attribute = "msid",
Value = $"{streamId ?? "-"} {trackId}"
});
// Associate original and retransmission SSRCs.
_mediaObject.MediaDescription.Attributes.SsrcGroups.Add(new SsrcGroup
{
Semantics = "FID",
SsrcIds = new string[] { $"{ssrc} {rtxSsrc}" }
});
}
}
public void PlanBReceive(RtpParameters offerRtpParameters, string streamId, string trackId)
{
var encoding = offerRtpParameters.Encodings[0];
var ssrc = encoding.Ssrc;
var rtxSsrc = (encoding.Rtx is not null && encoding.Rtx.Ssrc.HasValue)
? encoding.Rtx.Ssrc
: null;
var payloads = _mediaObject.MediaDescription.Fmts.ToArray();
foreach (var codec in offerRtpParameters.Codecs)
{
if (payloads.Contains(codec.PayloadType.ToString()))
{
continue;
}
Rtpmap rtpmap = new()
{
PayloadType = codec.PayloadType,
EncodingName = GetCodecName(codec),
ClockRate = codec.ClockRate,
Channels = codec.Channels > 1 ? codec.Channels : null
};
_mediaObject.MediaDescription.Attributes.Rtpmaps.Add(rtpmap);
Fmtp fmtp = codec.Parameters.ToFmtp(codec.PayloadType);
if (!string.IsNullOrEmpty(fmtp.Value))
{
_mediaObject.MediaDescription.Attributes.Fmtps.Add(fmtp);
}
foreach (var fb in codec.RtcpFeedback)
{
_mediaObject.MediaDescription.Attributes.RtcpFbs.Add(new RtcpFb
{
PayloadType = codec.PayloadType,
Type = fb.Type,
SubType = fb.Parameter
});
}
}
((List <string>)_mediaObject.MediaDescription.Fmts).AddRange(offerRtpParameters.Codecs
.Where(codec => !_mediaObject.MediaDescription.Fmts.Contains(codec.PayloadType.ToString()))
.Select(codec => codec.PayloadType.ToString())
.ToArray());
if (offerRtpParameters.Rtcp.Cname is not null)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)ssrc,
Attribute = "cname",
Value = offerRtpParameters.Rtcp.Cname
});
}
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)ssrc,
Attribute = "msid",
Value = $"{ streamId ?? "-"} { trackId}"
});
if (rtxSsrc is not null)
{
if (offerRtpParameters.Rtcp.Cname is not null)
{
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)rtxSsrc,
Attribute = "cname",
Value = offerRtpParameters.Rtcp.Cname
});
}
_mediaObject.MediaDescription.Attributes.Ssrcs.Add(new Ssrc
{
Id = (uint)rtxSsrc,
Attribute = "msid",
Value = $"{ streamId ?? "-"} {trackId}"
});
// Associate original and retransmission SSRCs.
_mediaObject.MediaDescription.Attributes.SsrcGroups.Add(new SsrcGroup
{
Semantics = "FID",
SsrcIds = new string[] { $"{ ssrc }${rtxSsrc}" }
});
}
}
void PlanBStopReceiving(RtpParameters offerRtpParameters)
{
var encoding = offerRtpParameters.Encodings[0];
var ssrc = encoding.Ssrc;
var rtxSsrc = (encoding.Rtx is not null && encoding.Rtx.Ssrc.HasValue) ?
encoding.Rtx.Ssrc : null;
((List <Ssrc>)_mediaObject.MediaDescription.Attributes.Ssrcs).RemoveAll(s => s.Id != ssrc && s.Id != rtxSsrc);
if (rtxSsrc is not null)
{
((List <SsrcGroup>)_mediaObject.MediaDescription.Attributes.SsrcGroups).RemoveAll(g => g.SsrcIds.Any(id => id != $"{ssrc} {rtxSsrc}"));
}
}
public override void SetDtlsRole(DtlsRole?dtlsRole)