use custom pionlog.

server/internal/webrtc/pionlog/factory.go

@@ -0,0 +1,27 @@
+package pionlog
+
+import (
+	"github.com/pion/logging"
+	"github.com/rs/zerolog"
+)
+
+func New(logger zerolog.Logger) Factory {
+	return Factory{
+		Logger: logger.With().Str("submodule", "pion").Logger(),
+	}
+}
+
+type Factory struct {
+	Logger zerolog.Logger
+}
+
+func (l Factory) NewLogger(subsystem string) logging.LeveledLogger {
+	if subsystem == "sctp" {
+		return nulllog{}
+	}
+
+	return logger{
+		subsystem: subsystem,
+		logger:    l.Logger.With().Str("subsystem", subsystem).Logger(),
+	}
+}