/// <summary>
/// Constructor for payload feedback reports that do not require any additional feedback control
/// indication parameters (e.g. Picture Loss Indication reports).
/// </summary>
/// <param name="feedbackMessageType">The payload specific feedback type.</param>
public RTCPFeedback(uint senderSsrc, uint mediaSsrc, PSFBFeedbackTypesEnum feedbackMessageType)
{
Header = new RTCPHeader(feedbackMessageType);
SenderSSRC = senderSsrc;
MediaSSRC = mediaSsrc;
SENDER_PAYLOAD_SIZE = 8;
}
/// <summary>
/// Extract and load the RTCP header from an RTCP packet.
/// </summary>
/// <param name="packet"></param>
public RTCPHeader(byte[] packet)
{
if (packet.Length < HEADER_BYTES_LENGTH)
{
throw new ApplicationException(
"The packet did not contain the minimum number of bytes for an RTCP header packet.");
}
UInt16 firstWord = BitConverter.ToUInt16(packet, 0);
if (BitConverter.IsLittleEndian)
{
firstWord = NetConvert.DoReverseEndian(firstWord);
Length = NetConvert.DoReverseEndian(BitConverter.ToUInt16(packet, 2));
}
else
{
Length = BitConverter.ToUInt16(packet, 2);
}
Version = Convert.ToInt32(firstWord >> 14);
PaddingFlag = Convert.ToInt32((firstWord >> 13) & 0x1);
PacketType = (RTCPReportTypesEnum)(firstWord & 0x00ff);
if (IsFeedbackReport())
{
if (PacketType == RTCPReportTypesEnum.RTPFB)
{
FeedbackMessageType = (RTCPFeedbackTypesEnum)((firstWord >> 8) & 0x1f);
}
else
{
PayloadFeedbackMessageType = (PSFBFeedbackTypesEnum)((firstWord >> 8) & 0x1f);
}
}
else
{
ReceptionReportCount = Convert.ToInt32((firstWord >> 8) & 0x1f);
}
}
public RTCPHeader(PSFBFeedbackTypesEnum feedbackType)
{
PacketType = RTCPReportTypesEnum.PSFB;
PayloadFeedbackMessageType = feedbackType;
}
