MOHAWK: Display a GUI error message when no audio devices are available

common/error.cpp

@@ -42,6 +42,8 @@ static String errorToString(ErrorCode errorCode) {
 		return _s("Game id not supported");
 	case kUnsupportedColorMode:
 		return _s("Unsupported color mode");
+	case kAudioDeviceInitFailed:
+		return _s("Audio device initialization failed");
 
 	case kReadPermissionDenied:
 		return _s("Read permission denied");

common/error.h

@@ -46,6 +46,7 @@ enum ErrorCode {
 	kNoGameDataFoundError,		///< Engine initialization: No game data was found in the specified location
 	kUnsupportedGameidError,	///< Engine initialization: Gameid not supported by this (Meta)Engine
 	kUnsupportedColorMode,		///< Engine initialization: Engine does not support backend's color mode
+	kAudioDeviceInitFailed,		///< Engine initialization: Audio device initialization failed
 
 	kReadPermissionDenied,		///< Unable to read data due to missing read permission
 	kWritePermissionDenied,		///< Unable to write data due to missing write permission

engines/mohawk/cstime.cpp

@@ -77,6 +77,10 @@ MohawkEngine_CSTime::~MohawkEngine_CSTime() {
 Common::Error MohawkEngine_CSTime::run() {
 	MohawkEngine::run();
 
+	if (!_mixer->isReady()) {
+		return Common::kAudioDeviceInitFailed;
+	}
+
 	_console = new CSTimeConsole(this);
 	_gfx = new CSTimeGraphics(this);
 	_video = new VideoManager(this);

engines/mohawk/livingbooks.cpp

@@ -170,6 +170,10 @@ MohawkEngine_LivingBooks::~MohawkEngine_LivingBooks() {
 Common::Error MohawkEngine_LivingBooks::run() {
 	MohawkEngine::run();
 
+	if (!_mixer->isReady()) {
+		return Common::kAudioDeviceInitFailed;
+	}
+
 	_console = new LivingBooksConsole(this);
 	// Load the book info from the detected file
 	loadBookInfo(getBookInfoFileName());

engines/mohawk/mohawk.cpp

@@ -35,9 +35,6 @@
 namespace Mohawk {
 
 MohawkEngine::MohawkEngine(OSystem *syst, const MohawkGameDescription *gamedesc) : Engine(syst), _gameDescription(gamedesc) {
-	if (!_mixer->isReady())
-		error ("Sound initialization failed");
-
 	// Setup mixer
 	syncSoundSettings();
 

engines/mohawk/myst.cpp

@@ -347,6 +347,10 @@ void MohawkEngine_Myst::playSoundBlocking(uint16 id) {
 Common::Error MohawkEngine_Myst::run() {
 	MohawkEngine::run();
 
+	if (!_mixer->isReady()) {
+		return Common::kAudioDeviceInitFailed;
+	}
+
 	_gfx = new MystGraphics(this);
 	_video = new VideoManager(this);
 	_sound = new MystSound(this);

engines/mohawk/riven.cpp

@@ -114,6 +114,10 @@ GUI::Debugger *MohawkEngine_Riven::getDebugger() {
 Common::Error MohawkEngine_Riven::run() {
 	MohawkEngine::run();
 
+	if (!_mixer->isReady()) {
+		return Common::kAudioDeviceInitFailed;
+	}
+
 	// Let's try to open the installer file (it holds extras.mhk)
 	// Though, we set a low priority to prefer the extracted version
 	if (_installerArchive.open("arcriven.z"))