Log processing cycles on verbosity level 2

src/common/logging.cpp

@@ -105,6 +105,12 @@ void Logger::log(const std::string& message) {
     *stream << formatted_message.str() << std::flush;
 }
 
+void Logger::log_trace(const std::string& message) {
+    if (verbosity >= Verbosity::all_events) {
+        log(message);
+    }
+}
+
 void Logger::log_get_parameter(int index) {
     if (BOOST_UNLIKELY(verbosity >= Verbosity::most_events)) {
         std::ostringstream message;

src/common/logging.h

@@ -55,6 +55,9 @@ class Logger {
          * The same as the above but without filtering out any events. This is
          * very chatty but it can be crucial for debugging plugin-specific
          * problems.
+         *
+         * This will also print print information about the audio processing
+         * callbacks, which can be useful for diagnosing misbehaving plugins.
          */
         all_events = 2,
     };
@@ -114,6 +117,16 @@ class Logger {
         const EventResultPayload& payload,
         const std::optional<EventResultPayload>& value_payload);
 
+    /**
+     * Log a message that should only be printed when the `verbosity` is set to
+     * `all_events`. This should only be used for simple primitive messages
+     * without any formatting since the actual check happens within this
+     * function.
+     *
+     * @param message The message to write.
+     */
+    void log_trace(const std::string& message);
+
    private:
     /**
      * Determine whether an event should be filtered based on the current