解决 soundcard 输入只能采用系统默认设备的问题。

modules/sources/source_soundcard/dialogsoundcard.cpp

@@ -106,18 +106,6 @@ void DialogSoundCard::InitMonitor()
 	mFormatSound.setSampleFormat(QAudioFormat::Int16); //set sample sze to 16 bit
 	mFormatSound.setSampleRate(ui->spinbox_sprate->value());
 	mFormatSound.setChannelCount(ui->spinbox_channels->value());
-	QAudioDevice infoIn;
-	if (ui->comboBox_audioDevices->currentIndex()>=0 &&
-			ui->comboBox_audioDevices->currentIndex()<m_devInputModule->rowCount())
-		infoIn = m_devInputlist[ui->comboBox_audioDevices->currentIndex()];
-	else
-		infoIn = QMediaDevices::defaultAudioInput();
-	if (!infoIn.isFormatSupported(mFormatSound))
-	{
-		//Default format not supported - trying to use nearest
-		mFormatSound = infoIn.preferredFormat();
-	}
-
 	CreateAudioInput();
 
 	mpInputDevSound = mpAudioInputSound->start();
@@ -133,8 +121,19 @@ void DialogSoundCard::CreateAudioInput()
 		disconnect(mpInputDevSound, 0, this, 0);
 		mpInputDevSound = 0;
 	}
+	QAudioDevice infoIn;
+	if (ui->comboBox_audioDevices->currentIndex()>=0 &&
+			ui->comboBox_audioDevices->currentIndex()<m_devInputModule->rowCount())
+		infoIn = m_devInputlist[ui->comboBox_audioDevices->currentIndex()];
+	else
+		infoIn = QMediaDevices::defaultAudioInput();
+	if (!infoIn.isFormatSupported(mFormatSound))
+	{
+		//Default format not supported - trying to use nearest
+		mFormatSound = infoIn.preferredFormat();
+	}
 
-	QAudioDevice inputDevice(QMediaDevices::defaultAudioInput());
+	QAudioDevice inputDevice(infoIn);
 	mpAudioInputSound = new QAudioSource(inputDevice, mFormatSound, this);
 	//Broadcast sample rates
 	TASKBUS::push_subject(0xffffffff,0,