bool IsRtxCodec(RtpCodecParameters codec) //=>
//Regex.IsMatch(codec.MimeType, ".+/rtx$");
{
var ok = Regex.IsMatch(codec.MimeType, ".+/rtx$");
return(ok);
}
public RtpParameters GenerateProbatorRtpParameters(RtpParameters inRtpParameters)
{
// Clone given reference video RTP parameters.
var videoRtpParameters = Utils.Clone(inRtpParameters, new RtpParameters());
// This may throw.
ValidateRtpParameters(videoRtpParameters);
RtpCodecParameters codec = videoRtpParameters.Codecs[0];
codec.PayloadType = RTP_PROBATOR_CODEC_PAYLOAD_TYPE;
var rtpParameters = new RtpParameters
{
Mid = RTP_PROBATOR_MID, //// new Mid { Id = RTP_PROBATOR_MID },
Codecs = new RtpCodecParameters[] { codec },
HeaderExtensions = videoRtpParameters.HeaderExtensions,
Encodings = new RtpEncodingParameters[] { new RtpEncodingParameters {
Ssrc = RTP_PROBATOR_SSRC
} },
Rtcp = new RtcpParameters {
Cname = RTP_PROBATOR_MID
}
};
return(rtpParameters);
}
protected string GetCodecName(RtpCodecParameters codec)
{
var match = Regex.Match(codec.MimeType, "^(audio|video)/(.+)");
if (!match.Success || match.Groups.Count != 3)
throw new Exception("invalid codec.mimeType");
return match.Groups[2].Value;
}
public void ValidateRtpCodecParameters(RtpCodecParameters codec)
{
// MimeType is mandatory.
if (codec.MimeType is null)
{
throw new Exception("missing codec.mimeType");
}
var match = Regex.Match(codec.MimeType, "^(audio|video)/(.+)");
if (!match.Success || match.Groups.Count != 3)
{
throw new Exception("invalid codec.mimeType");
}
var kind = (MediaKind)Enum.Parse(typeof(MediaKind), match.Groups[1].Value.ToLower(), true);
// Channels is optional. If unset, set it to 1 (just if audio).
if (kind == MediaKind.Audio)
{
if (!codec.Channels.HasValue)
{
codec.Channels = 1;
}
}
else
{
codec.Channels = null;
}
// RtcpFeedback is optional. If unset, set it to an empty array.
if (codec.RtcpFeedback is null)
{
codec.RtcpFeedback = new RtcpFeedback[] { }
}
;
foreach (var fb in codec.RtcpFeedback)
{
ValidateRtcpFeedback(fb);
}
}
bool MatchCodecs(RtpCodecParameters aCodec, RtpCodecCapability bCodec, bool strict = false,
bool modify = false)
{
var aMimeType = aCodec.MimeType.ToLower();
var bMimeType = bCodec.MimeType.ToLower();
if (aMimeType != bMimeType)
{
return(false);
}
if (aCodec.ClockRate != bCodec.ClockRate)
{
return(false);
}
if (aCodec.Channels != bCodec.Channels)
{
return(false);
}
switch (aMimeType)
{
case "video/h264":
var aPacketizationMode = aCodec.Parameters.ContainsKey("packetization-mode") ?
(int)aCodec.Parameters["packetization-mode"] : 0;
var bPacketizationMode = bCodec.Parameters.ContainsKey("packetization-mode") ?
(int)bCodec.Parameters["packetization-mode"] : 0;
if (aPacketizationMode != bPacketizationMode)
{
return(false);
}
if (strict)
{
if (!H264.IsSameProfile(aCodec.Parameters, bCodec.Parameters))
{
return(false);
}
string selectedProfileLevelId;
try
{
selectedProfileLevelId = H264.GenerateProfileLevelIdForAnswer(
aCodec.Parameters, bCodec.Parameters);
}
catch
{
return(false);
}
if (modify)
{
if (selectedProfileLevelId is not null)
{
aCodec.Parameters["profile-level-id"] = selectedProfileLevelId;
bCodec.Parameters["profile-level-id"] = selectedProfileLevelId;
}
else
{
aCodec.Parameters.Remove("profile-level-id");
bCodec.Parameters.Remove("profile-level-id");
}
}
}
break;
case "video/vp9":
if (strict)
{
var aProfileId = aCodec.Parameters.ContainsKey("profile-id") ?
(int)aCodec.Parameters["profile-id"] : 0;
var bProfileId = bCodec.Parameters.ContainsKey("profile-id") ?
(int)bCodec.Parameters["profile-id"] : 0;
if (aProfileId != bProfileId)
{
return(false);
}
}
break;
}
return(true);
}
