RTCP Packets Handling
[RTCP Layer]

Collaboration diagram for RTCP Packets Handling:

Functions
int	rtcp_parse_pkt (rtp_ssrc *ssrc, rtcp_pkt *pkt, int len)
int	rtcp_parse_sr (rtp_ssrc *ssrc, rtcp_pkt *pkt)
int	rtcp_parse_sdes (rtp_ssrc *ssrc, rtcp_pkt *pkt)
int	rtcp_parse_rr (rtcp_pkt *pkt)
int	rtcp_parse_bye (rtp_ssrc *ssrc, rtcp_pkt *pkt)
int	rtcp_parse_app (rtcp_pkt *pkt)
int	rtcp_send_rr (rtp_session *sess)
int	rtcp_build_rr (rtp_session *sess, rtcp_pkt *pkt)
int	rtcp_build_sdes (rtp_session *sess, rtcp_pkt *pkt, int left)
int	rtcp_send_bye (rtp_session *sess)

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Detailed Description

RTCP Packets Handling

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Function Documentation

int rtcp_build_rr	(	rtp_session *	rtp_sess,
		rtcp_pkt *	pkt
	)

Builds the Receiver Report packet

Parameters:

	rtp_sess	The session for which to build the report
	pkt	The packet where to write the report

Returns:

The Length of the generated report (number of 32bit words)

Definition at line 38 of file rtcp_report.c.

References nms_timeval_subtract().

Referenced by rtcp_send_rr().

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int rtcp_build_sdes	(	rtp_session *	rtp_sess,
		rtcp_pkt *	pkt,
		int	left
	)

Build the Source Description packet

Parameters:

	rtp_sess	The RTP Session for which to build the SDES
	pkt	The packet where to write the SDES
	left	Free space on the packet where the SDES will be written

Returns:

Length of the built source description (number of 32bit words)

Definition at line 123 of file rtcp_sdes.c.

Referenced by rtcp_send_rr().

int rtcp_parse_app

(

rtcp_pkt *

pkt

)

Parse application packet

Parameters:

pkt

The packet itself

Returns:

0

Definition at line 35 of file rtcp_app.c.

Referenced by rtcp_parse_pkt().

int rtcp_parse_bye	(	rtp_ssrc *	ssrc,
		rtcp_pkt *	pkt
	)

BYE packet handler, when rtcp layer gets a bye packet it signals it to the rtp layer reporting the end of stream.

Parameters:

	ssrc	The SSRC for which the packet was received
	pkt	The packet itself

Returns:

0

Definition at line 40 of file rtcp_bye.c.

References rtsp_thread::rtp_th.

Referenced by rtcp_parse_pkt().

int rtcp_parse_pkt	(	rtp_ssrc *	stm_src,
		rtcp_pkt *	pkt,
		int	len
	)

Parses a given packet and calls the correct handling function

Parameters:

	stm_src	The SSRC for which the packet has arrived
	pkt	The Received packet
	len	The length of the packet

Returns:

0 or 1 if the packet if of an unknown type

Definition at line 187 of file rtcp_recv.c.

References rtcp_parse_app(), rtcp_parse_bye(), rtcp_parse_rr(), rtcp_parse_sdes(), and rtcp_parse_sr().

Referenced by rtcp_recv().

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int rtcp_parse_rr

(

rtcp_pkt *

pkt

)

Receiver Report packet handling, actually does nothing

Definition at line 177 of file rtcp_report.c.

Referenced by rtcp_parse_pkt().

int rtcp_parse_sdes	(	rtp_ssrc *	stm_src,
		rtcp_pkt *	pkt
	)

Parse an incoming RTCP Packet with source description

Parameters:

	stm_src	The SSRC from which we received the packet
	pkt	The packet itself

Returns:

0

Definition at line 78 of file rtcp_sdes.c.

References rtcp_set_ssrc_sdes().

Referenced by rtcp_parse_pkt().

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int rtcp_parse_sr	(	rtp_ssrc *	stm_src,
		rtcp_pkt *	pkt
	)

Sender Report packet handling. Sets the NTP timestamp in the the ssrc_stats of the given RTP_SSRC.

Parameters:

	stm_src	The SSRC for which the packet was received
	pkt	The packet itself

Returns:

0

Definition at line 191 of file rtcp_report.c.

Referenced by rtcp_parse_pkt().

int rtcp_send_bye

(

rtp_session *

rtp_sess

)

Sends the Bye packet. Actually it does nothing

Parameters:

rtp_sess

The session for which to send the bye packet

Returns:

0

Definition at line 58 of file rtcp_bye.c.

Referenced by rtcp_handle_event().

int rtcp_send_rr

(

rtp_session *

rtp_sess

)

Actually sends the Receiver Report for the given session

Parameters:

rtp_sess

The Session for which to generate and send the report packet

Definition at line 128 of file rtcp_report.c.

References rtcp_build_rr(), and rtcp_build_sdes().

Referenced by rtcp_handle_event().

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