Use this constructor to encapsulate the raw bytes received in a UDP packet. You can then access the RTP packet header fields using the properties of the new RtpPacket object. Use the GetPayloadBytes() method to get a byte array containing the media bytes.

Declaration

public RtpPacket(byte[] SrcBytes)

Parameters

Type	Name	Description
byte[]	SrcBytes	Byte array to "attach" to. Must be at least MIN_PACKET_LENGTH bytes long.

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RtpPacket(int)

Creates an new RTP packet given the length of the payload in bytes. The RTP header will be 12 bytes.

Declaration

public RtpPacket(int PayloadLength)

Parameters

Type	Name	Description
int	PayloadLength	Number of bytes in the payload.

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RtpPacket(int, int)

Creates a new RtpPacket given the payload length and the RTP packet header length.

Declaration

public RtpPacket(int PayloadLength, int headerLength)

Parameters

Type	Name	Description
int	PayloadLength	Length of the packet payload in bytes. May be 0 is only sending an RTP packet header.
int	headerLength	Length of the RTP packet header in bytes. Must be at least 12. The headerLength can be calculated as: 12 + 4 * (number of CSRCs).

Exceptions

Type	Condition
ArgumentException	Thrown if the headerLength is less than the minimum RTP packet header length of 12.

Fields

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CSRC_LENGTH

Length of each CSRC in bytes

Declaration

public const int CSRC_LENGTH = 4

Field Value

Type	Description
int

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MIN_PACKET_LENGTH

Minimum RTP packet length. This assumes that CSRCs are included.

Declaration

public const int MIN_PACKET_LENGTH = 12

Field Value

Type	Description
int

Properties

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CSRCs

Gets a list of CSRCs (contributing source identifiers) for this RTP packet.

Declaration

public List<uint>? CSRCs { get; }

Property Value

Type	Description
List<uint>

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CsrcCount

Gets or sets the CSRC Count.

Declaration

public int CsrcCount { get; set; }

Property Value

Type	Description
int

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HeaderLength

Gets the length of the RTP packet header.

Declaration

public int HeaderLength { get; }

Property Value

Type	Description
int

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Marker

Gets or sets the M (marker) bit.

Declaration

public bool Marker { get; set; }

Property Value

Type	Description
bool

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PacketBytes

Gets the entire packet byte array

Declaration

public byte[]? PacketBytes { get; }

Property Value

Type	Description
byte[]

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Padding

Gets or sets the Padding bit.

Declaration

public bool Padding { get; set; }

Property Value

Type	Description
bool

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Payload

Gets or sets the payload of the RTP packet. The getter returns a copy of the payload bytes.

Declaration

public byte[]? Payload { get; set; }

Property Value

Type	Description
byte[]

Exceptions

Type	Condition
ArgumentException	Thrown by if the input packet is longer than the allocated payload length for this RTP packet.

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PayloadLength

Gets the number of bytes in the RTP packet payload.

Declaration

public int PayloadLength { get; }

Property Value

Type	Description
int

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PayloadType

Gets or sets the Payload Type (PT) field in the RTP header. The Payload Type must be between 0 and 127.

Declaration

public int PayloadType { get; set; }

Property Value

Type	Description
int

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SSRC

Gets or sets the synchronization source identifier (SSRC).

Declaration

public uint SSRC { get; set; }

Property Value

Type	Description
uint

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SequenceNumber

Gets or sets the Sequence Number field of the RTP packet header.

Declaration

public ushort SequenceNumber { get; set; }

Property Value

Type	Description
ushort

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Timestamp

Gets or sets the Timestamp field of the RTP packet header.

Declaration

public uint Timestamp { get; set; }

Property Value

Type	Description
uint

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Version

Gets the Version field.

Declaration

public int Version { get; }

Property Value

Type	Description
int

Methods

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GetCSRC(int)

Gets a CSRC specified by its index.

Declaration

public uint GetCSRC(int Idx)

Parameters

Type	Name	Description
int	Idx	Index of the CSRC to get.

Returns

Type	Description
uint	Returns the specified CSRC. Returns 0 if the index is out range.

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GetHeaderBytes()

Gets only the bytes from the header portion of the RTP packet.

Declaration

public byte[] GetHeaderBytes()

Returns

Type	Description
byte[]	Returns a byte array containing the header bytes.

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GetPayloadBytes()

Strips out the RTP packet header and returns new byte array containing the packet payload.

Declaration

public byte[]? GetPayloadBytes()

Returns

Type	Description
byte[]	Returns null if there is no payload or a new byte array containing the payload bytes if there is a payload for the RTP packet.

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SetCSRC(int, uint)

Sets a CSRC value.

Declaration

public void SetCSRC(int Idx, uint CSRC)

Parameters

Type	Name	Description
int	Idx	Index of the CSRC to set.
uint	CSRC	CSRC value.

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SetPayloadBytes(byte[])

Sets the payload bytes in the packet.

Declaration

public void SetPayloadBytes(byte[] payloadBytes)

Parameters

Type	Name	Description
byte[]	payloadBytes	Contains the payload bytes. The length must be equal to PayloadLength