feat: basic ffi server to support other languages (#34)

* wip

* wip

* wip

* wip

not a fan of the way I do handles ..

* errors and async semantic

* fix example

livekit/src/prelude.rs

@@ -23,4 +23,6 @@ pub use crate::webrtc::{
     },
     rtp_receiver::RtpReceiver,
     rtp_transceiver::RtpTransceiver,
+    video_frame::{VideoFrame, VideoRotation},
+    video_frame_buffer::{VideoFrameBuffer, VideoFrameBufferTrait, VideoFrameBufferType},
 };

livekit/src/room/id.rs

@@ -49,8 +49,12 @@ pub struct ParticipantIdentity(String);
 #[derive(Clone, Default, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
 pub struct TrackSid(String);
 
+#[derive(Clone, Default, Debug, Eq, Hash, PartialEq, PartialOrd, Ord)]
+pub struct RoomSid(String);
+
 id_str! {
     ParticipantSid;
     ParticipantIdentity;
     TrackSid;
+    RoomSid;
 }

livekit/src/room/room_session.rs

@@ -5,7 +5,7 @@ use crate::rtc_engine::{EngineEvent, EngineEvents, EngineResult, RTCEngine};
 use crate::signal_client::SignalOptions;
 use crate::{RoomError, RoomEvent, RoomResult, SimulateScenario};
 use livekit_utils::observer::Dispatcher;
-use parking_lot::{Mutex, RwLock};
+use parking_lot::{Mutex, RwLock, RwLockReadGuard};
 use std::collections::HashMap;
 use std::sync::atomic::{AtomicU8, Ordering};
 use std::sync::Arc;
@@ -149,8 +149,8 @@ impl RoomSession {
         self.inner.state.load(Ordering::Acquire).try_into().unwrap()
     }
 
-    pub fn participants(&self) -> &RwLock<HashMap<ParticipantSid, Arc<RemoteParticipant>>> {
-        &self.inner.participants
+    pub fn participants(&self) -> RwLockReadGuard<HashMap<ParticipantSid, Arc<RemoteParticipant>>> {
+        self.inner.participants.read()
     }
 
     pub async fn simulate_scenario(&self, scenario: SimulateScenario) -> EngineResult<()> {

livekit/src/room/track/audio_track.rs

@@ -1,3 +1,4 @@
+use super::impl_track_trait;
 use crate::prelude::*;
 use std::sync::Arc;
 
@@ -27,3 +28,5 @@ impl TryFrom<TrackHandle> for AudioTrackHandle {
         }
     }
 }
+
+impl_track_trait!(AudioTrackHandle, enum_dispatch, [Local, Remote]);

livekit/src/room/track/local_track.rs

@@ -1,3 +1,4 @@
+use super::impl_track_trait;
 use crate::prelude::*;
 use std::sync::Arc;
 
@@ -27,3 +28,5 @@ impl TryFrom<TrackHandle> for LocalTrackHandle {
         }
     }
 }
+
+impl_track_trait!(LocalTrackHandle, enum_dispatch, [Audio, Video]);

livekit/src/room/track/mod.rs

@@ -117,6 +117,7 @@ pub trait TrackTrait {
     fn name(&self) -> String;
     fn kind(&self) -> TrackKind;
     fn stream_state(&self) -> StreamState;
+    fn muted(&self) -> bool;
     fn start(&self);
     fn stop(&self);
     fn register_observer(&self) -> mpsc::UnboundedReceiver<TrackEvent>;
@@ -201,6 +202,7 @@ impl TrackTrait for TrackHandle {
         fnc!(name, &Self, [], String);
         fnc!(kind, &Self, [], TrackKind);
         fnc!(stream_state, &Self, [], StreamState);
+        fnc!(muted, &Self, [], bool);
         fnc!(start, &Self, [], ());
         fnc!(stop, &Self, [], ());
         fnc!(register_observer, &Self, [], mpsc::UnboundedReceiver<TrackEvent>);
@@ -246,6 +248,10 @@ macro_rules! impl_track_trait {
                 self.shared.stream_state.load(Ordering::SeqCst).into()
             }
 
+            fn muted(&self) -> bool {
+                self.shared.muted.load(Ordering::SeqCst)
+            }
+
             fn start(&self) {
                 self.shared.start();
             }
@@ -263,6 +269,25 @@ macro_rules! impl_track_trait {
             }
         }
     };
+    ($x:ident, enum_dispatch, [$($variant:ident),+]) => {
+        use livekit_utils::enum_dispatch;
+        use tokio::sync::mpsc;
+
+        impl TrackTrait for $x {
+            enum_dispatch!(
+                [$($variant),+]
+                fnc!(sid, &Self, [], TrackSid);
+                fnc!(name, &Self, [], String);
+                fnc!(kind, &Self, [], TrackKind);
+                fnc!(stream_state, &Self, [], StreamState);
+                fnc!(muted, &Self, [], bool);
+                fnc!(start, &Self, [], ());
+                fnc!(stop, &Self, [], ());
+                fnc!(register_observer, &Self, [], mpsc::UnboundedReceiver<TrackEvent>);
+                fnc!(set_muted, &Self, [muted: bool], ());
+            );
+        }
+    };
 }
 
 pub(super) use impl_track_trait;

livekit/src/room/track/remote_track.rs

@@ -1,7 +1,6 @@
+use super::impl_track_trait;
 use crate::prelude::*;
-use livekit_utils::enum_dispatch;
 use std::sync::Arc;
-use tokio::sync::mpsc;
 
 #[derive(Clone, Debug)]
 pub enum RemoteTrackHandle {
@@ -9,20 +8,6 @@ pub enum RemoteTrackHandle {
     Video(Arc<RemoteVideoTrack>),
 }
 
-impl TrackTrait for RemoteTrackHandle {
-    enum_dispatch!(
-        [Audio, Video]
-        fnc!(sid, &Self, [], TrackSid);
-        fnc!(name, &Self, [], String);
-        fnc!(kind, &Self, [], TrackKind);
-        fnc!(stream_state, &Self, [], StreamState);
-        fnc!(start, &Self, [], ());
-        fnc!(stop, &Self, [], ());
-        fnc!(register_observer, &Self, [], mpsc::UnboundedReceiver<TrackEvent>);
-        fnc!(set_muted, &Self, [muted: bool], ());
-    );
-}
-
 impl From<RemoteTrackHandle> for TrackHandle {
     fn from(remote_track: RemoteTrackHandle) -> Self {
         match remote_track {
@@ -43,3 +28,5 @@ impl TryFrom<TrackHandle> for RemoteTrackHandle {
         }
     }
 }
+
+impl_track_trait!(RemoteTrackHandle, enum_dispatch, [Audio, Video]);

livekit/src/room/track/video_track.rs

@@ -1,3 +1,4 @@
+use super::impl_track_trait;
 use crate::prelude::*;
 use std::sync::Arc;
 
@@ -27,3 +28,5 @@ impl TryFrom<TrackHandle> for VideoTrackHandle {
         }
     }
 }
+
+impl_track_trait!(VideoTrackHandle, enum_dispatch, [Local, Remote]);