Audio codec: added function returning the codec's current operational status

openrtx/include/core/audio_codec.h

@@ -72,6 +72,13 @@ bool codec_startDecode(const pathId path);
  */
 void codec_stop(const pathId path);
 
+/**
+ * Get current oprational status of the codec thread.
+ *
+ * @return true if the codec thread is active.
+ */
+bool codec_running();
+
 /**
  * Get a compressed audio frame from the internal queue. Each frame is composed
  * of 8 bytes.

openrtx/src/core/audio_codec.c

@@ -109,6 +109,11 @@ void codec_stop(const pathId path)
     stopThread();
 }
 
+bool codec_running()
+{
+    return running;
+}
+
 int codec_popFrame(uint8_t *frame, const bool blocking)
 {
     if(running == false)
@@ -351,6 +356,13 @@ static bool startThread(const pathId path, void *(*func) (void *))
     pthread_mutex_lock(&init_mutex);
     if(running)
     {
+        // Same path as before, path open, codec already running: all good.
+        if(path == audioPath)
+        {
+            pthread_mutex_unlock(&init_mutex);
+            return true;
+        }
+
         // New path takes over the current one only if it has an higher priority
         // or the current one is closed/suspended.
         pathInfo_t newPath = audioPath_getInfo(path);