feat: forward libwebrtc logs (#75)

webrtc-sys/include/livekit/logsink.h

@@ -0,0 +1,46 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#include "livekit/webrtc.h"
+#include "rtc_base/logging.h"
+#include "rust/cxx.h"
+
+namespace livekit {
+class LogSink;
+}  // namespace livekit
+#include "webrtc-sys/src/logsink.rs.h"
+
+
+namespace livekit {
+
+class LogSink : public rtc::LogSink {
+public:
+  LogSink(rust::Fn<void(rust::String message, LoggingSeverity severity)> fnc);
+  ~LogSink();
+
+  void OnLogMessage(const std::string& message, rtc::LoggingSeverity severity) override;
+  void OnLogMessage(const std::string& message) override {}
+
+private:
+  rust::Fn<void(rust::String message, LoggingSeverity severity)> fnc_;
+};
+
+std::unique_ptr<LogSink> new_log_sink(rust::Fn<void(rust::String, LoggingSeverity)> fnc);
+
+}  // namespace livekit
+