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/*
This file is part of keks-meet (https://codeberg.org/metamuffin/keks-meet)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2023 metamuffin <metamuffin.org>
*/
use clap::Parser;
use libkeks::{
instance::Instance,
peer::{Peer, TransportChannel},
protocol::ProvideInfo,
webrtc::{
rtcp::payload_feedbacks::picture_loss_indication::PictureLossIndication,
rtp::{codecs::h264::H264Packet, packetizer::Depacketizer},
track::track_remote::TrackRemote,
},
Config, DynFut, EventHandler,
};
use log::{debug, error, info, warn};
use std::{
io::{stdout, Write},
sync::{
atomic::{AtomicBool, Ordering},
Arc,
},
time::Duration,
};
fn main() {
env_logger::builder()
.filter_module("keks_meet_export_track", log::LevelFilter::Info)
.filter_module("libkeks", log::LevelFilter::Info)
.filter_module("webrtc", log::LevelFilter::Error)
.parse_env("LOG")
.init();
tokio::runtime::Builder::new_multi_thread()
.enable_all()
.build()
.unwrap()
.block_on(run())
}
#[derive(Parser, Clone)]
/// exports any kind of track from a keks-meet conference.
pub struct Args {
/// keks-meet server used for establishing p2p connection
#[clap(long, default_value = "wss://meet.metamuffin.org")]
signaling_uri: String,
/// username for the `identify` packet
#[clap(short, long, default_value = "guest")]
username: String,
/// pre-shared secret (aka. room name)
#[clap(short, long)]
secret: String,
/// interval to send "picture loss indicator" to the remote
#[clap(long)]
pli_interval: Option<f64>,
}
async fn run() {
let args = Args::parse();
let inst = Instance::new(
Config {
signaling_uri: args.signaling_uri.clone(),
username: args.username.clone(),
},
Arc::new(Handler {
_args: Arc::new(args.clone()),
requested_track: Arc::new(AtomicBool::new(false)),
}),
)
.await;
inst.join(Some(&args.secret)).await;
inst.spawn_ping().await;
inst.receive_loop().await;
tokio::signal::ctrl_c().await.unwrap();
error!("interrupt received, exiting");
}
#[derive(Clone)]
struct Handler {
_args: Arc<Args>,
requested_track: Arc<AtomicBool>,
}
impl EventHandler for Handler {
fn peer_join(&self, _peer: Arc<Peer>) -> libkeks::DynFut<()> {
Box::pin(async move {})
}
fn peer_leave(&self, _peer: Arc<Peer>) -> libkeks::DynFut<()> {
Box::pin(async move {})
}
fn resource_added(
&self,
peer: Arc<Peer>,
info: libkeks::protocol::ProvideInfo,
) -> DynFut<()> {
let id = info.id.clone();
let r = self.requested_track.clone();
Box::pin(async move {
if info.kind == "track" {
info!("track of interest is provided, requesting");
if !r.swap(true, Ordering::Relaxed) {
peer.request_resource(id).await;
}
}
})
}
fn resource_removed(&self, _peer: Arc<Peer>, _id: String) -> DynFut<()> {
Box::pin(async {})
}
fn resource_connected(
&self,
peer: Arc<Peer>,
_resource: &ProvideInfo,
channel: TransportChannel,
) -> libkeks::DynFut<()> {
let peer = Arc::downgrade(&peer);
let args = Arc::downgrade(&self._args);
Box::pin(async move {
match channel {
TransportChannel::Track(track) => {
let args = args.upgrade().unwrap();
let peer = peer.upgrade().unwrap();
info!("got track remote!");
if let Some(pli_interval) = args.pli_interval {
let media_ssrc = track.ssrc();
let peer = peer.clone();
tokio::spawn(async move {
loop {
tokio::time::sleep(Duration::from_secs_f64(pli_interval)).await;
debug!("sending pli");
let r = peer
.peer_connection
.write_rtcp(&[Box::new(PictureLossIndication {
sender_ssrc: 0,
media_ssrc,
})])
.await;
if r.is_err() {
break;
}
}
});
}
if let Err(e) = export(track.clone()).await {
error!("export failed: {e}")
}
info!("stopping, telling the remote to stop too.");
peer.request_stop_resource(track.stream_id()).await;
}
TransportChannel::DataChannel(_) => warn!("wrong type"),
}
})
}
}
async fn export(track: Arc<TrackRemote>) -> anyhow::Result<()> {
let mut cached_packet = H264Packet::default();
info!("depacketizing rtp to stdout");
loop {
let (packet, _) = track.read_rtp().await?;
if !packet.payload.is_empty() {
let raw_payload = cached_packet.depacketize(&packet.payload)?;
stdout().write_all(&raw_payload)?;
}
}
}
|
