New audio devices dialog and handling: use variable global input volume

sdrbase/audio/audioinput.cpp

@@ -26,6 +26,7 @@ AudioInput::AudioInput() :
 	m_audioInput(0),
 	m_audioUsageCount(0),
 	m_onExit(false),
+	m_volume(0.5f),
 	m_audioFifos()
 {
 }
@@ -95,7 +96,7 @@ bool AudioInput::start(int device, int rate)
         }
 
         m_audioInput = new QAudioInput(devInfo, m_audioFormat);
-        m_audioInput->setVolume(0.2); // TODO: take it from global parameters
+        m_audioInput->setVolume(m_volume);
 
         QIODevice::open(QIODevice::ReadWrite);
 

sdrbase/audio/audioinput.h

@@ -42,12 +42,14 @@ public:
 
 	uint getRate() const { return m_audioFormat.sampleRate(); }
 	void setOnExit(bool onExit) { m_onExit = onExit; }
+	void setVolume(float volume) { m_volume = volume; }
 
 private:
 	QMutex m_mutex;
 	QAudioInput* m_audioInput;
 	uint m_audioUsageCount;
 	bool m_onExit;
+	float m_volume;
 
 	typedef std::list<AudioFifo*> AudioFifos;
 	AudioFifos m_audioFifos;

sdrbase/dsp/dspengine.h

@@ -55,6 +55,7 @@ public:
     void stopAudioInput();
     void startAudioInputImmediate();
     void stopAudioInputImmediate();
+    void setAudioInputVolume(float volume) { m_audioInput.setVolume(volume); }
 
     DSPDeviceSourceEngine *getDeviceSourceEngineByIndex(uint deviceIndex) { return m_deviceSourceEngines[deviceIndex]; }
     DSPDeviceSourceEngine *getDeviceSourceEngineByUID(uint uid);

sdrbase/mainwindow.cpp

@@ -739,6 +739,7 @@ void MainWindow::on_action_Audio_triggered()
 {
 	AudioDialog audioDialog(m_audioDeviceInfo, this);
 	audioDialog.exec();
+	m_dspEngine->setAudioInputVolume(m_audioDeviceInfo->getInputVolume());
 }
 
 void MainWindow::on_action_My_Position_triggered()