sfu 0.0.3

WebRTC Selective Forwarding Unit (SFU) in Rust with Sans-IO
Documentation 
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use crate::interceptor::report::ReportBuilder;
use crate::interceptor::{Interceptor, InterceptorEvent};
use crate::messages::{MessageEvent, RTPMessageEvent, TaggedMessageEvent};
use rtcp::header::PacketType;

pub(crate) struct SenderReport {
    pub(super) next: Option<Box<dyn Interceptor>>,
}

impl SenderReport {
    pub(crate) fn builder() -> ReportBuilder {
        ReportBuilder {
            is_rr: false,
            ..Default::default()
        }
    }
}

impl Interceptor for SenderReport {
    fn chain(mut self: Box<Self>, next: Box<dyn Interceptor>) -> Box<dyn Interceptor> {
        self.next = Some(next);
        self
    }

    fn next(&mut self) -> Option<&mut Box<dyn Interceptor>> {
        self.next.as_mut()
    }

    fn read(&mut self, msg: &mut TaggedMessageEvent) -> Vec<InterceptorEvent> {
        let mut interceptor_events = vec![];

        if let MessageEvent::Rtp(RTPMessageEvent::Rtcp(rtcp_packets)) = &msg.message {
            let mut inbound_rtcp_packets = vec![];

            for rtcp_packet in rtcp_packets {
                let packet_type = rtcp_packet.header().packet_type;
                if packet_type == PacketType::ReceiverReport
                    || (packet_type == PacketType::TransportSpecificFeedback)
                {
                    // let's not forward ReceiverReport and TransportSpecificFeedback
                    // since they are hop by hop reports, instead of end to end reports
                    continue;
                } else {
                    inbound_rtcp_packets.push(rtcp_packet.clone());
                }
            }

            if !inbound_rtcp_packets.is_empty() {
                interceptor_events.push(InterceptorEvent::Inbound(TaggedMessageEvent {
                    now: msg.now,
                    transport: msg.transport,
                    message: MessageEvent::Rtp(RTPMessageEvent::Rtcp(inbound_rtcp_packets)),
                }));
            }
        }

        if let Some(next) = self.next() {
            let mut events = next.read(msg);
            interceptor_events.append(&mut events);
        }
        interceptor_events
    }
}