feat: forward libwebrtc logs (#75)

webrtc-sys/src/lib.rs

@@ -3,6 +3,7 @@ pub mod candidate;
 pub mod data_channel;
 pub mod helper;
 pub mod jsep;
+pub mod logsink;
 pub mod media_stream;
 pub mod peer_connection;
 pub mod peer_connection_factory;

webrtc-sys/src/logsink.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2023 LiveKit
+ *
+ * Licensed under the Apache License, Version 2.0 (the “License”);
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an “AS IS” BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <memory>
+
+#include "livekit/logsink.h"
+
+namespace livekit {
+
+LogSink::LogSink(rust::Fn<void(rust::String message, LoggingSeverity severity)> fnc) : fnc_(fnc) {
+  rtc::LogMessage::AddLogToStream(this, rtc::LoggingSeverity::LS_VERBOSE);
+}
+
+LogSink::~LogSink() {
+  rtc::LogMessage::RemoveLogToStream(this);
+}
+
+void LogSink::OnLogMessage(const std::string& message, rtc::LoggingSeverity severity) {
+  fnc_(rust::String(message), static_cast<LoggingSeverity>(severity));
+}
+
+std::unique_ptr<LogSink> new_log_sink(rust::Fn<void (rust::String, LoggingSeverity)> fnc) {
+  return std::make_unique<LogSink>(fnc);
+}
+
+}
+

webrtc-sys/src/logsink.rs

@@ -0,0 +1,24 @@
+use crate::impl_thread_safety;
+
+#[cxx::bridge(namespace = "livekit")]
+pub mod ffi {
+
+    #[derive(Debug)]
+    #[repr(i32)]
+    pub enum LoggingSeverity {
+        Verbose,
+        Info,
+        Warning,
+        Error,
+        None,
+    }
+
+    unsafe extern "C++" {
+        include!("livekit/logsink.h");
+
+        type LogSink;
+        fn new_log_sink(fnc: fn(String, LoggingSeverity)) -> UniquePtr<LogSink>;
+    }
+}
+
+impl_thread_safety!(ffi::LogSink, Send + Sync);