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Class unaRTPReceiver

Description

Hierarchy

Fields

Methods

Properties

Unit

unaSocks_RTP

Declaration

type unaRTPReceiver = class(unaRTPStreamer)

Description

Basic RTP receiver (UDP only)

Hierarchy

TObject
unaObject
unaThread
unaRTPStreamer
unaRTPReceiver

Overview

Methods

	`constructor create(isRAW: bool = false); overload;`
	`constructor create(const bind2addr: TSockAddrIn; remoteAddr: PSockAddrIn = nil; noRTCP: bool = false; transmitter: unaRTPTransmitter = nil; ttl: int = -1; isUDP: bool = true; isRAW: bool = false); overload;`
	`function sendRTP_CN_To(addr: PSockAddrIn): int;`
	`function execute(threadID: unsigned): int; override;`
	`procedure AfterConstruction(); override;`
	`procedure setNewSSRC(newssrc: u_int32);`
	`procedure onBye(si: prtp_site_info; soft: bool); override;`
	`procedure onIdle(rtcpIdle: bool); override;`
	`procedure onNeedRTPHole(si: prtp_site_info); virtual;`
	`procedure onPayload(addr: PSockAddrIn; hdr: prtp_hdr; data: pointer; len, packetSize: uint); override;`
	`procedure onRTCPPacket(ssrc: u_int32; addr: PSockAddrIn; hdr: prtcp_common_hdr; packetSize: uint); override;`
	`procedure onSsrcCNAME(ssrc: u_int32; cname: prtcp_sdes_item); override;`
	`procedure pushRTCPPacket(packet: pointer; len: uint); override;`
	`procedure startIn(); override;`
	`procedure startOut(); override;`
	`procedure weSent(addr: PSockAddrIn; data: pointer; len: uint);`

Properties

	`property bind2ip: string read f_bind2ip;`
	`property bind2port: string read f_bind2port;`
	`property CN_resendInterval: int read f_CN_resendInterval write f_CN_resendInterval;`
	`property ip: string read f_ip;`
	`property isServer: bool read f_isServer;`
	`property portLocal: string read f_portL;`

Description

Methods

	`constructor create(isRAW: bool = false); overload;`
Creates a new instance without a socket.

constructor create(const bind2addr: TSockAddrIn; remoteAddr: PSockAddrIn = nil; noRTCP: bool = false; transmitter: unaRTPTransmitter = nil; ttl: int = -1; isUDP: bool = true; isRAW: bool = false); overload;

Creates a new receiver instance.

Parameters

bind2port: Bind to this local port (could be 0)
ip: Remote IP (where to send packets)
isRAW: true if non-RTP streaming
bind2ip: Bind to this local IP (default is '0.0.0.0')
transmitter: Master transmitter
isUDP: True for UDP, False for TCP
noRTCP: Enable RTCP for RTP
ttl: TTL for multicast
mcport: multicast group port (needed only for sending data, for receiving use bind2port parameter)
ignoreLocalIPs: do not treat this PCs IPs as special case

function sendRTP_CN_To(addr: PSockAddrIn): int;

Sends RTP CN (comfort noise) packet (payload = c_rtpPTa_CN) to remote side. Used mostly at beginning of streaming to make holes in NAT.

Parameters

addr: Remote address to send ping to

Returns

0 if successfull or winsock error code otherwise.

	`function execute(threadID: unsigned): int; override;`

	`procedure AfterConstruction(); override;`
Initializes required fields

	`procedure setNewSSRC(newssrc: u_int32);`
Not everyday function.

	`procedure onBye(si: prtp_site_info; soft: bool); override;`

	`procedure onIdle(rtcpIdle: bool); override;`
Called from context of idle thread.

	`procedure onNeedRTPHole(si: prtp_site_info); virtual;`

	`procedure onPayload(addr: PSockAddrIn; hdr: prtp_hdr; data: pointer; len, packetSize: uint); override;`

procedure onRTCPPacket(ssrc: u_int32; addr: PSockAddrIn; hdr: prtcp_common_hdr; packetSize: uint); override;

New RTCP packed was received.

Parameters

ssrc: Generator of packet
addr: Remote address packet was received from.
hdr: RTCP packet header.
packetSize: Packet size including padding.

	`procedure onSsrcCNAME(ssrc: u_int32; cname: prtcp_sdes_item); override;`

	`procedure pushRTCPPacket(packet: pointer; len: uint); override;`
Notify transmitter (if any) of new RTCP packet

	`procedure startIn(); override;`

	`procedure startOut(); override;`

	`procedure weSent(addr: PSockAddrIn; data: pointer; len: uint);`
Should be called just after new RTP packet was sent.

Properties

	`property bind2ip: string read f_bind2ip;`
Bind to this interface (default is 0.0.0.0 means bind to all interfaces).

	`property bind2port: string read f_bind2port;`
Port number (to receive RTP payload on). In case of TCP socket - remote port number to connect to.

	`property CN_resendInterval: int read f_CN_resendInterval write f_CN_resendInterval;`
Re-send interval for CN packets

	`property ip: string read f_ip;`
In case of multicast - group IP In case of unicast UDP/TCP sockets - remote host IP (set to '0.0.0.0' for TCP server)

	`property isServer: bool read f_isServer;`
True if TCP server.

	`property portLocal: string read f_portL;`
Actual local RTP port number used in this session. Could be used to get port number assigned by system when bind2port property is 0.

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