Partial fix for #1600: ALSA device can be selected using a combo box

include/AudioAlsa.h

@@ -37,12 +37,33 @@
 #include "AudioDevice.h"
 
 
-class LcdSpinBox;
-class QLineEdit;
-
-
 class AudioAlsa : public AudioDevice, public QThread
 {
+	// Public classes and enums
+public:
+	/**
+	 * @brief Contains the relevant information about available ALSA devices
+	 */
+	class DeviceInfo
+	{
+	public:
+		DeviceInfo(QString const & deviceName, QString const & deviceDescription) :
+			m_deviceName(deviceName),
+			m_deviceDescription(deviceDescription)
+		{}
+		~DeviceInfo() {}
+
+		QString const & getDeviceName() const { return m_deviceName; }
+		QString const & getDeviceDescription() const { return m_deviceDescription; }
+
+	private:
+		QString m_deviceName;
+		QString m_deviceDescription;
+
+	};
+
+	typedef std::vector<DeviceInfo> DeviceInfoCollection;
+
 public:
 	AudioAlsa( bool & _success_ful, Mixer* mixer );
 	virtual ~AudioAlsa();
@@ -55,21 +76,7 @@ class AudioAlsa : public AudioDevice, public QThread
 
 	static QString probeDevice();
 
-
-	class setupWidget : public AudioDevice::setupWidget
-	{
-	public:
-		setupWidget( QWidget * _parent );
-		virtual ~setupWidget();
-
-		virtual void saveSettings();
-
-	private:
-		QLineEdit * m_device;
-		LcdSpinBox * m_channels;
-
-	} ;
-
+	static DeviceInfoCollection getAvailableDevices();
 
 private:
 	virtual void startProcessing();

include/AudioAlsaSetupWidget.h

@@ -0,0 +1,64 @@
+/*
+ * AudioDeviceSetupWidget.h - Implements a setup widget for ALSA-PCM-output
+ *
+ * Copyright (c) 2004-2015 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ *
+ * This file is part of LMMS - http://lmms.io
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef AUDIO_ALSA_SETUP_WIDGET_H
+#define AUDIO_ALSA_SETUP_WIDGET_H
+
+#include "lmmsconfig.h"
+
+#ifdef LMMS_HAVE_ALSA
+
+#include "AudioDeviceSetupWidget.h"
+
+#include "AudioAlsa.h"
+
+
+class QComboBox;
+class LcdSpinBox;
+
+
+class AudioAlsaSetupWidget : public AudioDeviceSetupWidget
+{
+	Q_OBJECT
+
+public:
+	AudioAlsaSetupWidget( QWidget * _parent );
+	virtual ~AudioAlsaSetupWidget();
+
+	virtual void saveSettings();
+
+public slots:
+	void onCurrentIndexChanged(int index);
+
+private:
+	QComboBox * m_deviceComboBox;
+	LcdSpinBox * m_channels;
+
+	int m_selectedDevice;
+	AudioAlsa::DeviceInfoCollection m_deviceInfos;
+} ;
+
+#endif
+
+#endif

include/AudioDevice.h

@@ -90,32 +90,6 @@ class AudioDevice
 
 
 
-	class setupWidget : public TabWidget
-	{
-	public:
-		setupWidget( const QString & _caption, QWidget * _parent ) :
-			TabWidget( TabWidget::tr( "Settings for %1" ).arg(
-					TabWidget::tr( _caption.toLatin1() ) ).
-							toUpper(), _parent )
-		{
-		}
-
-		virtual ~setupWidget()
-		{
-		}
-
-		virtual void saveSettings() = 0;
-
-		virtual void show()
-		{
-			parentWidget()->show();
-			QWidget::show();
-		}
-
-	} ;
-
-
-
 protected:
 	// subclasses can re-implement this for being used in conjunction with
 	// processNextBuffer()

include/AudioDeviceSetupWidget.h

@@ -0,0 +1,55 @@
+/*
+ * AudioDeviceSetupWidget.h - Base class for audio device setup widgets
+ *
+ * Copyright (c) 2004-2015 Tobias Doerffel <tobydox/at/users.sourceforge.net>
+ *
+ * This file is part of LMMS - http://lmms.io
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef AUDIO_DEVICE_SETUP_WIDGET_H
+#define AUDIO_DEVICE_SETUP_WIDGET_H
+
+#include "TabWidget.h"
+
+
+class AudioDeviceSetupWidget : public TabWidget
+{
+public:
+	AudioDeviceSetupWidget( const QString & _caption, QWidget * _parent ) :
+		TabWidget( TabWidget::tr( "Settings for %1" ).arg(
+				TabWidget::tr( _caption.toLatin1() ) ).
+						toUpper(), _parent )
+	{
+	}
+
+	virtual ~AudioDeviceSetupWidget()
+	{
+	}
+
+	virtual void saveSettings() = 0;
+
+	virtual void show()
+	{
+		parentWidget()->show();
+		QWidget::show();
+	}
+};
+
+
+#endif

include/AudioDummy.h

@@ -26,6 +26,7 @@
 #define AUDIO_DUMMY_H
 
 #include "AudioDevice.h"
+#include "AudioDeviceSetupWidget.h"
 #include "MicroTimer.h"
 
 
@@ -49,11 +50,11 @@ class AudioDummy : public AudioDevice, public QThread
 	}
 
 
-	class setupWidget : public AudioDevice::setupWidget
+	class setupWidget : public AudioDeviceSetupWidget
 	{
 	public:
 		setupWidget( QWidget * _parent ) :
-			AudioDevice::setupWidget( AudioDummy::name(), _parent )
+			AudioDeviceSetupWidget( AudioDummy::name(), _parent )
 		{
 		}
 

include/AudioJack.h

@@ -35,6 +35,7 @@
 #include <QtCore/QMap>
 
 #include "AudioDevice.h"
+#include "AudioDeviceSetupWidget.h"
 
 
 class QLineEdit;
@@ -55,7 +56,7 @@ class AudioJack : public QObject, public AudioDevice
 	}
 
 
-	class setupWidget : public AudioDevice::setupWidget
+	class setupWidget : public AudioDeviceSetupWidget
 	{
 	public:
 		setupWidget( QWidget * _parent );

include/AudioOss.h

@@ -30,6 +30,7 @@
 #ifdef LMMS_HAVE_OSS
 
 #include "AudioDevice.h"
+#include "AudioDeviceSetupWidget.h"
 
 
 class LcdSpinBox;
@@ -50,7 +51,7 @@ class AudioOss : public AudioDevice, public QThread
 	static QString probeDevice();
 
 
-	class setupWidget : public AudioDevice::setupWidget
+	class setupWidget : public AudioDeviceSetupWidget
 	{
 	public:
 		setupWidget( QWidget * _parent );

include/AudioPulseAudio.h

@@ -32,6 +32,7 @@
 #include <pulse/pulseaudio.h>
 
 #include "AudioDevice.h"
+#include "AudioDeviceSetupWidget.h"
 
 
 class LcdSpinBox;
@@ -52,7 +53,7 @@ class AudioPulseAudio : public AudioDevice, public QThread
 	static QString probeDevice();
 
 
-	class setupWidget : public AudioDevice::setupWidget
+	class setupWidget : public AudioDeviceSetupWidget
 	{
 	public:
 		setupWidget( QWidget * _parent );

include/AudioSdl.h

@@ -33,6 +33,7 @@
 #include <SDL/SDL_audio.h>
 
 #include "AudioDevice.h"
+#include "AudioDeviceSetupWidget.h"
 
 class QLineEdit;
 
@@ -50,7 +51,7 @@ class AudioSdl : public AudioDevice
 	}
 
 
-	class setupWidget : public AudioDevice::setupWidget
+	class setupWidget : public AudioDeviceSetupWidget
 	{
 	public:
 		setupWidget( QWidget * _parent );

include/SetupDialog.h

@@ -33,6 +33,8 @@
 #include "AudioDevice.h"
 #include "MidiClient.h"
 
+#include "AudioDeviceSetupWidget.h"
+
 
 class QComboBox;
 class QLabel;
@@ -178,7 +180,7 @@ private slots:
 	bool m_displayWaveform;
 	bool m_disableAutoQuit;
 
-	typedef QMap<QString, AudioDevice::setupWidget *> AswMap;
+	typedef QMap<QString, AudioDeviceSetupWidget *> AswMap;
 	typedef QMap<QString, MidiClient::setupWidget *> MswMap;
 	typedef QMap<QString, QString> trMap;