/// <summary>
/// Constructs a new GoodbyeReport from the given values.
/// </summary>
/// <param name="version">The version of the report</param>
/// <param name="padding"></param>
/// <param name="ssrc">The id of the senders of the report</param>
/// <param name="sourcesLeaving">The SourceList which describes the sources who are leaving</param>
/// <param name="reasonForLeaving">An optional reason for leaving(only the first 255 octets will be used)</param>
internal GoodbyeReport(int version, int padding, int ssrc, Media.RFC3550.SourceList sourcesLeaving, byte[] reasonForLeaving)
: this(version, padding, ssrc,
sourcesLeaving.Count + 1, //BlockCount, + 1 because the ssrc is present.
0, // 0 is extensionSize which is assigned by the size of reasonForLeaving in the constructor via ref.
sourcesLeaving.Count *RFC3550.SourceList.ItemSize, //bytesInSourceList
reasonForLeaving)
{
sourcesLeaving.TryCopyTo(m_OwnedOctets, Payload.Offset);
}
/// <summary>
/// Constructs a new GoodbyeReport from the given values.
/// </summary>
/// <param name="version">The version of the report</param>
/// <param name="padding"></param>
/// <param name="ssrc">The id of the senders of the report</param>
/// <param name="sourcesLeaving">The SourceList which describes the sources who are leaving</param>
/// <param name="reasonForLeaving">An optional reason for leaving(only the first 255 octets will be used)</param>
public GoodbyeReport(int version, int padding, int ssrc, Media.RFC3550.SourceList sourcesLeaving, byte[] reasonForLeaving)
: base(version, PayloadType, padding, ssrc,
sourcesLeaving != null ? sourcesLeaving.Count : 0, //BlockCount
Media.RFC3550.SourceList.ItemSize, //Size in bytes of each block
Media.Common.Extensions.Array.ArrayExtensions.IsNullOrEmpty(reasonForLeaving) ? 0 : 1 + reasonForLeaving.Length) //Extension size in bytes
{
//The working offset in the payload
int offset = Payload.Offset;
//Copy the source list (IMHO it should be before the reason...)
if (sourcesLeaving != null)
{
sourcesLeaving.TryCopyTo(Payload.Array, offset);
offset += sourcesLeaving.Size;
}
#region Babble
/* If I won't have a participant list then I sure as shit won't make thing as they shouldn't be here just for [Wireshark, et al]
* 6.6 BYE: Goodbye RTCP Packet
*
* 0 1 2 3
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|V=2|P| SC | PT=BYE=203 | length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| SSRC/CSRC |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| : ... : (THIS IS WHERE THE SOURCE LIST GOES FYI)
+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
| (opt) | length | reason for leaving ...
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
* When SC = 0 the packet is useless.
* When SC >= 1 the SourceList appears BEFORE the (opt) Length, The id there may be different from SSRC/CSRC
* Length is optional and a 0 value should not HAVE to be present as including a 0 value forces you to inlcude 3 more 0's to octet align the payload
*/
#endregion
//If a reason was given there will be extension data
if (HasExtensionData)
{
int extensionLength = Media.Common.Extensions.Array.ArrayExtensions.IsNullOrEmpty(reasonForLeaving) ? 0 : reasonForLeaving.Length;
if (extensionLength > 0)
{
//Ensure it will fit
if (extensionLength > byte.MaxValue)
{
throw new InvalidOperationException("Only 255 octets can occupy the ReasonForLeaving in a GoodbyeReport.");
}
//The length before the string
Payload.Array[offset++] = (byte)extensionLength;
//Copy it to the payload
reasonForLeaving.CopyTo(Payload.Array, offset);
}
}
}
