fixed sound on linux using phonon. This should be extensible to all unix systems

retroshare-gui/src/gui/SoundManager.cpp

@@ -37,6 +37,14 @@
 #define GROUP_ENABLE    "Enable"
 #define GROUP_SOUNDFILE "SoundFilePath"
 
+#ifdef UBUNTU
+#include <phonon/audiooutput.h>
+#include <phonon/mediaobject.h>
+#include <phonon/mediasource.h>
+
+Phonon::MediaObject *SoundManager::mediaObject = NULL ;
+#endif
+
 SoundManager *soundManager = NULL;
 
 SoundEvents::SoundEvents()
@@ -234,12 +242,24 @@ void SoundManager::playFile(const QString &filename)
 	}
 
 	QString playFilename = realFilename(filename);
+    
+#ifdef UBUNTU
+    	// The media object is only deleted before being used, so as to avoid a memory leak. We cannot delete it after calling play() because the
+    	// playing is asynchronous. The way to do this properly would be to connect the finish() signal of the player to some slot that delete it,
+    	// assuming it's not done in a static method like now.
+    
+    	if(mediaObject != NULL)
+            delete mediaObject ;
+        
+        mediaObject = Phonon::createPlayer(Phonon::NotificationCategory, Phonon::MediaSource(QUrl::fromLocalFile(filename)));
+	mediaObject->play();
+#else
 
 #if QT_VERSION >= QT_VERSION_CHECK (5, 0, 0)
-	if (!QAudioDeviceInfo::availableDevices(QAudio::AudioOutput).isEmpty()) {
+	if (!QAudioDeviceInfo::availableDevices(QAudio::AudioOutput).isEmpty()) 
 #else
-	if (QSound::isAvailable()) {
+	if (QSound::isAvailable()) 
 #endif
 		QSound::play(playFilename);
-	}
+#endif
 }

retroshare-gui/src/gui/SoundManager.h

@@ -30,6 +30,10 @@
 #define SOUND_MESSAGE_ARRIVED   "MessageArrived"
 #define SOUND_DOWNLOAD_COMPLETE "DownloadComplete"
 
+#ifdef UBUNTU
+#include <phonon/mediaobject.h>
+#endif
+
 class SoundEvents
 {
 public:
@@ -84,9 +88,12 @@ public:
 
 	static QString eventFilename(const QString &event);
 	static void setEventFilename(const QString &event, const QString &filename);
-
+    
 private:
 	SoundManager();
+#ifdef UBUNTU    
+   	static Phonon::MediaObject *mediaObject ;
+#endif
 };
 
 extern SoundManager *soundManager;

retroshare-gui/src/retroshare-gui.pro

@@ -66,6 +66,7 @@ linux-* {
 
 	PKGCONFIG *= x11 xscrnsaver
 
+	LIBS *= -lphonon
 	LIBS *= -rdynamic
 	DEFINES *= HAVE_XSS # for idle time, libx screensaver extensions
 	DEFINES *= UBUNTU