Simplify code and add explanation comments

Author: pri-yan-shu

src/soundio/pipewireenumerator.cpp

@@ -177,12 +177,12 @@ void PipewireEnumerator::initialize() {
 
     pw_filter_add_listener(m_pPwFilter, &m_pwFilterListener, &filter_events, this);
 
-    for (auto it = m_inputs.begin(); it != m_inputs.end(); ++it) {
-        createInputPorts(it->first, it->second);
+    for (auto& [input, ports] : m_inputs) {
+        createInputPorts(input, ports);
     }
 
-    for (auto it = m_outputs.begin(); it != m_outputs.end(); ++it) {
-        createOutputPorts(it->first, it->second);
+    for (auto& [output, ports] : m_outputs) {
+        createOutputPorts(output, ports);
     }
 
     int res = pw_filter_connect(m_pPwFilter,
@@ -195,6 +195,8 @@ void PipewireEnumerator::initialize() {
                  << spa_strerror(res);
     }
 
+    // queue an event when device enumeration is complete
+    // so we can compare from Mixxx config and configure the devices
     m_coreSyncSeq = pw_core_sync(m_pPwCore, PW_ID_CORE, 0);
 
     pw_thread_loop_start(m_pPwThreadLoop);