getVolume() make configurable

Author: pschatzmann

src/AudioBoard.h

@@ -62,7 +62,12 @@ class AudioBoard {
     this->volume = volume; 
     return driver->setVolume(volume); 
   }
-  int getVolume() { return volume >= 0 ? volume : driver->getVolume(); }
+  int getVolume() { 
+#if DRIVER_REPORT_DRIVER_VOLUME
+    return driver->getVolume(); }
+#else
+    return volume >= 0 ? volume : driver->getVolume(); }
+#endif
   DriverPins& getPins() { return *pins; }
   bool setPAPower(bool enable) { return driver->setPAPower(enable); }
   /// set volume for adc: this is only supported on some defined codecs

src/AudioDriverConfig.h

@@ -5,6 +5,14 @@
 #  define DRIVER_DEFAULT_VOLUME 70
 #endif
 
+// AudioBoard getVolume() can report the volume reported by the driver or the volume that was last
+// set. When using the driver volume, there might be small rounding errors compared to
+// the last defined value.
+#ifndef DRIVER_REPORT_DRIVER_VOLUME
+#  define DRIVER_REPORT_DRIVER_VOLUME false
+#endif
+
+
 // To increase the max volume e.g. for ai_thinker (ES8388) 2957 or A202 -> set
 // to 1 or 2 0 AUX volume is LINE level 1 you can control the AUX volume with
 // setVolume()
@@ -30,3 +38,4 @@
 #ifndef FORCE_WIRE_CLOSE
 #  define FORCE_WIRE_CLOSE false
 #endif
+