#[cfg(test)]
mod tests;
use crate::consumer::{Consumer, ConsumerId, ConsumerOptions};
use crate::data_consumer::{DataConsumer, DataConsumerId, DataConsumerOptions, DataConsumerType};
use crate::data_producer::{DataProducer, DataProducerId, DataProducerOptions, DataProducerType};
use crate::data_structures::{AppData, SctpState};
use crate::messages::{TransportCloseRequest, TransportSendRtcpNotification};
use crate::producer::{Producer, ProducerId, ProducerOptions};
use crate::router::transport::{TransportImpl, TransportType};
use crate::router::Router;
use crate::sctp_parameters::SctpParameters;
use crate::transport::{
ConsumeDataError, ConsumeError, ProduceDataError, ProduceError, RecvRtpHeaderExtensions,
RtpListener, SctpListener, Transport, TransportGeneric, TransportId, TransportTraceEventData,
TransportTraceEventType,
};
use crate::worker::{
Channel, NotificationError, PayloadChannel, RequestError, SubscriptionHandler,
};
use async_executor::Executor;
use async_trait::async_trait;
use event_listener_primitives::{Bag, BagOnce, HandlerId};
use log::{debug, error};
use nohash_hasher::IntMap;
use parking_lot::Mutex;
use serde::{Deserialize, Serialize};
use std::fmt;
use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
use std::sync::{Arc, Weak};
#[derive(Debug, Clone)]
#[non_exhaustive]
pub struct DirectTransportOptions {
pub max_message_size: usize,
pub app_data: AppData,
}
impl Default for DirectTransportOptions {
fn default() -> Self {
Self {
max_message_size: 262_144,
app_data: AppData::default(),
}
}
}
#[derive(Debug, Clone, Eq, PartialEq, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
#[doc(hidden)]
#[non_exhaustive]
pub struct DirectTransportDump {
pub id: TransportId,
pub direct: bool,
pub producer_ids: Vec<ProducerId>,
pub consumer_ids: Vec<ConsumerId>,
pub map_ssrc_consumer_id: IntMap<u32, ConsumerId>,
pub map_rtx_ssrc_consumer_id: IntMap<u32, ConsumerId>,
pub data_producer_ids: Vec<DataProducerId>,
pub data_consumer_ids: Vec<DataConsumerId>,
pub recv_rtp_header_extensions: RecvRtpHeaderExtensions,
pub rtp_listener: RtpListener,
pub max_message_size: usize,
pub sctp_parameters: Option<SctpParameters>,
pub sctp_state: Option<SctpState>,
pub sctp_listener: Option<SctpListener>,
pub trace_event_types: String,
}
#[derive(Debug, Clone, PartialEq, Deserialize, Serialize)]
#[serde(rename_all = "camelCase")]
#[non_exhaustive]
#[allow(missing_docs)]
pub struct DirectTransportStat {
pub transport_id: TransportId,
pub timestamp: u64,
pub sctp_state: Option<SctpState>,
pub bytes_received: usize,
pub recv_bitrate: u32,
pub bytes_sent: usize,
pub send_bitrate: u32,
pub rtp_bytes_received: usize,
pub rtp_recv_bitrate: u32,
pub rtp_bytes_sent: usize,
pub rtp_send_bitrate: u32,
pub rtx_bytes_received: usize,
pub rtx_recv_bitrate: u32,
pub rtx_bytes_sent: usize,
pub rtx_send_bitrate: u32,
pub probation_bytes_sent: usize,
pub probation_send_bitrate: u32,
#[serde(skip_serializing_if = "Option::is_none")]
pub available_outgoing_bitrate: Option<u32>,
#[serde(skip_serializing_if = "Option::is_none")]
pub available_incoming_bitrate: Option<u32>,
#[serde(skip_serializing_if = "Option::is_none")]
pub max_incoming_bitrate: Option<u32>,
#[serde(skip_serializing_if = "Option::is_none")]
pub rtp_packet_loss_received: Option<f64>,
#[serde(skip_serializing_if = "Option::is_none")]
pub rtp_packet_loss_sent: Option<f64>,
}
#[derive(Default)]
#[allow(clippy::type_complexity)]
struct Handlers {
rtcp: Bag<Arc<dyn Fn(&[u8]) + Send + Sync>>,
new_producer: Bag<Arc<dyn Fn(&Producer) + Send + Sync>, Producer>,
new_consumer: Bag<Arc<dyn Fn(&Consumer) + Send + Sync>, Consumer>,
new_data_producer: Bag<Arc<dyn Fn(&DataProducer) + Send + Sync>, DataProducer>,
new_data_consumer: Bag<Arc<dyn Fn(&DataConsumer) + Send + Sync>, DataConsumer>,
trace: Bag<Arc<dyn Fn(&TransportTraceEventData) + Send + Sync>, TransportTraceEventData>,
router_close: BagOnce<Box<dyn FnOnce() + Send>>,
close: BagOnce<Box<dyn FnOnce() + Send>>,
}
#[derive(Debug, Deserialize)]
#[serde(tag = "event", rename_all = "lowercase", content = "data")]
enum Notification {
Trace(TransportTraceEventData),
}
#[derive(Debug, Deserialize)]
#[serde(tag = "event", rename_all = "lowercase", content = "data")]
enum PayloadNotification {
Rtcp,
}
struct Inner {
id: TransportId,
next_mid_for_consumers: AtomicUsize,
used_sctp_stream_ids: Mutex<IntMap<u16, bool>>,
cname_for_producers: Mutex<Option<String>>,
executor: Arc<Executor<'static>>,
channel: Channel,
payload_channel: PayloadChannel,
handlers: Arc<Handlers>,
app_data: AppData,
router: Router,
closed: AtomicBool,
_subscription_handlers: Mutex<Vec<Option<SubscriptionHandler>>>,
_on_router_close_handler: Mutex<HandlerId>,
}
impl Drop for Inner {
fn drop(&mut self) {
debug!("drop()");
self.close(true);
}
}
impl Inner {
fn close(&self, close_request: bool) {
if !self.closed.swap(true, Ordering::SeqCst) {
debug!("close()");
self.handlers.close.call_simple();
if close_request {
let channel = self.channel.clone();
let router_id = self.router.id();
let request = TransportCloseRequest {
transport_id: self.id,
};
self.executor
.spawn(async move {
if let Err(error) = channel.request(router_id, request).await {
error!("transport closing failed on drop: {}", error);
}
})
.detach();
}
}
}
}
#[derive(Clone)]
#[must_use = "Transport will be closed on drop, make sure to keep it around for as long as needed"]
pub struct DirectTransport {
inner: Arc<Inner>,
}
impl fmt::Debug for DirectTransport {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("DirectTransport")
.field("id", &self.inner.id)
.field("next_mid_for_consumers", &self.inner.next_mid_for_consumers)
.field("used_sctp_stream_ids", &self.inner.used_sctp_stream_ids)
.field("cname_for_producers", &self.inner.cname_for_producers)
.field("router", &self.inner.router)
.field("closed", &self.inner.closed)
.finish()
}
}
#[async_trait]
impl Transport for DirectTransport {
fn id(&self) -> TransportId {
self.inner.id
}
fn router(&self) -> &Router {
&self.inner.router
}
fn app_data(&self) -> &AppData {
&self.inner.app_data
}
fn closed(&self) -> bool {
self.inner.closed.load(Ordering::SeqCst)
}
async fn produce(&self, producer_options: ProducerOptions) -> Result<Producer, ProduceError> {
debug!("produce()");
let producer = self
.produce_impl(producer_options, TransportType::Direct)
.await?;
self.inner.handlers.new_producer.call_simple(&producer);
Ok(producer)
}
async fn consume(&self, consumer_options: ConsumerOptions) -> Result<Consumer, ConsumeError> {
debug!("consume()");
let consumer = self
.consume_impl(consumer_options, TransportType::Direct, false)
.await?;
self.inner.handlers.new_consumer.call_simple(&consumer);
Ok(consumer)
}
async fn produce_data(
&self,
data_producer_options: DataProducerOptions,
) -> Result<DataProducer, ProduceDataError> {
debug!("produce_data()");
let data_producer = self
.produce_data_impl(
DataProducerType::Direct,
data_producer_options,
TransportType::Direct,
)
.await?;
self.inner
.handlers
.new_data_producer
.call_simple(&data_producer);
Ok(data_producer)
}
async fn consume_data(
&self,
data_consumer_options: DataConsumerOptions,
) -> Result<DataConsumer, ConsumeDataError> {
debug!("consume_data()");
let data_consumer = self
.consume_data_impl(
DataConsumerType::Direct,
data_consumer_options,
TransportType::Direct,
)
.await?;
self.inner
.handlers
.new_data_consumer
.call_simple(&data_consumer);
Ok(data_consumer)
}
async fn enable_trace_event(
&self,
types: Vec<TransportTraceEventType>,
) -> Result<(), RequestError> {
debug!("enable_trace_event()");
self.enable_trace_event_impl(types).await
}
fn on_new_producer(
&self,
callback: Arc<dyn Fn(&Producer) + Send + Sync + 'static>,
) -> HandlerId {
self.inner.handlers.new_producer.add(callback)
}
fn on_new_consumer(
&self,
callback: Arc<dyn Fn(&Consumer) + Send + Sync + 'static>,
) -> HandlerId {
self.inner.handlers.new_consumer.add(callback)
}
fn on_new_data_producer(
&self,
callback: Arc<dyn Fn(&DataProducer) + Send + Sync + 'static>,
) -> HandlerId {
self.inner.handlers.new_data_producer.add(callback)
}
fn on_new_data_consumer(
&self,
callback: Arc<dyn Fn(&DataConsumer) + Send + Sync + 'static>,
) -> HandlerId {
self.inner.handlers.new_data_consumer.add(callback)
}
fn on_trace(
&self,
callback: Arc<dyn Fn(&TransportTraceEventData) + Send + Sync + 'static>,
) -> HandlerId {
self.inner.handlers.trace.add(callback)
}
fn on_router_close(&self, callback: Box<dyn FnOnce() + Send + 'static>) -> HandlerId {
self.inner.handlers.router_close.add(callback)
}
fn on_close(&self, callback: Box<dyn FnOnce() + Send + 'static>) -> HandlerId {
let handler_id = self.inner.handlers.close.add(Box::new(callback));
if self.inner.closed.load(Ordering::Relaxed) {
self.inner.handlers.close.call_simple();
}
handler_id
}
}
#[async_trait]
impl TransportGeneric for DirectTransport {
type Dump = DirectTransportDump;
type Stat = DirectTransportStat;
#[doc(hidden)]
async fn dump(&self) -> Result<Self::Dump, RequestError> {
debug!("dump()");
serde_json::from_value(self.dump_impl().await?).map_err(|error| {
RequestError::FailedToParse {
error: error.to_string(),
}
})
}
async fn get_stats(&self) -> Result<Vec<Self::Stat>, RequestError> {
debug!("get_stats()");
serde_json::from_value(self.get_stats_impl().await?).map_err(|error| {
RequestError::FailedToParse {
error: error.to_string(),
}
})
}
}
impl TransportImpl for DirectTransport {
fn channel(&self) -> &Channel {
&self.inner.channel
}
fn payload_channel(&self) -> &PayloadChannel {
&self.inner.payload_channel
}
fn executor(&self) -> &Arc<Executor<'static>> {
&self.inner.executor
}
fn next_mid_for_consumers(&self) -> &AtomicUsize {
&self.inner.next_mid_for_consumers
}
fn used_sctp_stream_ids(&self) -> &Mutex<IntMap<u16, bool>> {
&self.inner.used_sctp_stream_ids
}
fn cname_for_producers(&self) -> &Mutex<Option<String>> {
&self.inner.cname_for_producers
}
}
impl DirectTransport {
pub(super) fn new(
id: TransportId,
executor: Arc<Executor<'static>>,
channel: Channel,
payload_channel: PayloadChannel,
app_data: AppData,
router: Router,
) -> Self {
debug!("new()");
let handlers = Arc::<Handlers>::default();
let subscription_handler = {
let handlers = Arc::clone(&handlers);
channel.subscribe_to_notifications(id.into(), move |notification| {
match serde_json::from_slice::<Notification>(notification) {
Ok(notification) => match notification {
Notification::Trace(trace_event_data) => {
handlers.trace.call_simple(&trace_event_data);
}
},
Err(error) => {
error!("Failed to parse notification: {}", error);
}
}
})
};
let payload_subscription_handler = {
let handlers = Arc::clone(&handlers);
payload_channel.subscribe_to_notifications(id.into(), move |message, payload| {
match serde_json::from_slice::<PayloadNotification>(message) {
Ok(notification) => match notification {
PayloadNotification::Rtcp => {
handlers.rtcp.call(|callback| {
callback(payload);
});
}
},
Err(error) => {
error!("Failed to parse payload notification: {}", error);
}
}
})
};
let next_mid_for_consumers = AtomicUsize::default();
let used_sctp_stream_ids = Mutex::new(IntMap::default());
let cname_for_producers = Mutex::new(None);
let inner_weak = Arc::<Mutex<Option<Weak<Inner>>>>::default();
let on_router_close_handler = router.on_close({
let inner_weak = Arc::clone(&inner_weak);
move || {
let maybe_inner = inner_weak.lock().as_ref().and_then(Weak::upgrade);
if let Some(inner) = maybe_inner {
inner.handlers.router_close.call_simple();
inner.close(false);
}
}
});
let inner = Arc::new(Inner {
id,
next_mid_for_consumers,
used_sctp_stream_ids,
cname_for_producers,
executor,
channel,
payload_channel,
handlers,
app_data,
router,
closed: AtomicBool::new(false),
_subscription_handlers: Mutex::new(vec![
subscription_handler,
payload_subscription_handler,
]),
_on_router_close_handler: Mutex::new(on_router_close_handler),
});
inner_weak.lock().replace(Arc::downgrade(&inner));
Self { inner }
}
pub fn send_rtcp(&self, rtcp_packet: Vec<u8>) -> Result<(), NotificationError> {
self.inner
.payload_channel
.notify(self.id(), TransportSendRtcpNotification {}, rtcp_packet)
}
pub fn on_rtcp<F: Fn(&[u8]) + Send + Sync + 'static>(&self, callback: F) -> HandlerId {
self.inner.handlers.rtcp.add(Arc::new(callback))
}
#[must_use]
pub fn downgrade(&self) -> WeakDirectTransport {
WeakDirectTransport {
inner: Arc::downgrade(&self.inner),
}
}
}
#[derive(Clone)]
pub struct WeakDirectTransport {
inner: Weak<Inner>,
}
impl fmt::Debug for WeakDirectTransport {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("WeakDirectTransport").finish()
}
}
impl WeakDirectTransport {
#[must_use]
pub fn upgrade(&self) -> Option<DirectTransport> {
let inner = self.inner.upgrade()?;
Some(DirectTransport { inner })
}
}