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use std::sync::Arc;
use crate::error::*;
use crate::stream_info::StreamInfo;
use crate::*;
/// Chain is an interceptor that runs all child interceptors in order.
#[derive(Default)]
pub struct Chain {
interceptors: Vec<Arc<dyn Interceptor + Send + Sync>>,
}
impl Chain {
/// new returns a new Chain interceptor.
pub fn new(interceptors: Vec<Arc<dyn Interceptor + Send + Sync>>) -> Self {
Chain { interceptors }
}
pub fn add(&mut self, icpr: Arc<dyn Interceptor + Send + Sync>) {
self.interceptors.push(icpr);
}
}
#[async_trait]
impl Interceptor for Chain {
/// bind_rtcp_reader lets you modify any incoming RTCP packets. It is called once per sender/receiver, however this might
/// change in the future. The returned method will be called once per packet batch.
async fn bind_rtcp_reader(
&self,
mut reader: Arc<dyn RTCPReader + Send + Sync>,
) -> Arc<dyn RTCPReader + Send + Sync> {
for icpr in &self.interceptors {
reader = icpr.bind_rtcp_reader(reader).await;
}
reader
}
/// bind_rtcp_writer lets you modify any outgoing RTCP packets. It is called once per PeerConnection. The returned method
/// will be called once per packet batch.
async fn bind_rtcp_writer(
&self,
mut writer: Arc<dyn RTCPWriter + Send + Sync>,
) -> Arc<dyn RTCPWriter + Send + Sync> {
for icpr in &self.interceptors {
writer = icpr.bind_rtcp_writer(writer).await;
}
writer
}
/// bind_local_stream lets you modify any outgoing RTP packets. It is called once for per LocalStream. The returned method
/// will be called once per rtp packet.
async fn bind_local_stream(
&self,
info: &StreamInfo,
mut writer: Arc<dyn RTPWriter + Send + Sync>,
) -> Arc<dyn RTPWriter + Send + Sync> {
for icpr in &self.interceptors {
writer = icpr.bind_local_stream(info, writer).await;
}
writer
}
/// unbind_local_stream is called when the Stream is removed. It can be used to clean up any data related to that track.
async fn unbind_local_stream(&self, info: &StreamInfo) {
for icpr in &self.interceptors {
icpr.unbind_local_stream(info).await;
}
}
/// bind_remote_stream lets you modify any incoming RTP packets. It is called once for per RemoteStream. The returned method
/// will be called once per rtp packet.
async fn bind_remote_stream(
&self,
info: &StreamInfo,
mut reader: Arc<dyn RTPReader + Send + Sync>,
) -> Arc<dyn RTPReader + Send + Sync> {
for icpr in &self.interceptors {
reader = icpr.bind_remote_stream(info, reader).await;
}
reader
}
/// unbind_remote_stream is called when the Stream is removed. It can be used to clean up any data related to that track.
async fn unbind_remote_stream(&self, info: &StreamInfo) {
for icpr in &self.interceptors {
icpr.unbind_remote_stream(info).await;
}
}
/// close closes the Interceptor, cleaning up any data if necessary.
async fn close(&self) -> Result<()> {
let mut errs = vec![];
for icpr in &self.interceptors {
if let Err(err) = icpr.close().await {
errs.push(err);
}
}
flatten_errs(errs)
}
}