add volume control to audiohandler

audiohandler.cpp

@@ -827,6 +827,15 @@ bool audioHandler::init(const quint8 bits, const quint8 channels, const quint16
 	return isInitialized;
 }
 
+void audioHandler::setVolume(quint8 volume)
+{
+	if (audioOutput != Q_NULLPTR) {
+		audioOutput->setVolume((qreal)(volume / 255.0));
+	}
+	else if (audioInput != Q_NULLPTR) {
+		audioInput->setVolume((qreal)(volume / 255.0));
+	}
+}
 
 bool audioHandler::setDevice(QAudioDeviceInfo deviceInfo)
 {

audiohandler.h

@@ -46,7 +46,7 @@ public:
     bool setDevice(QAudioDeviceInfo deviceInfo);
 
     void start();
-    void setVolume(float volume);
+    void setVolume(quint8 volume);
     void flush();
     void stop();