Volume: Return volume type as an enum

ISOFile and GameFile were using IsWiiDisc() and IsWadFile() to set
an enum value. The volume might as well return an enum directly.

I increased the Qt CACHE_REVISION because m_platform now is saved as u32
instead of int, but increasing the wx CACHE_REVISION is not necessary.

Source/Core/DiscIO/FileMonitor.cpp

@@ -76,7 +76,7 @@ void ReadFileSystem(const std::string& filename)
 	if (!OpenISO)
 		return;
 
-	if (!OpenISO->IsWadFile())
+	if (OpenISO->GetVolumeType() != DiscIO::IVolume::WII_WAD)
 	{
 		pFileSystem = DiscIO::CreateFileSystem(OpenISO);
 

Source/Core/DiscIO/Volume.h

@@ -19,6 +19,14 @@ class IVolume
 {
 public:
 	// Increment CACHE_REVISION if the enums below are modified (ISOFile.cpp & GameFile.cpp)
+	enum EPlatform
+	{
+		GAMECUBE_DISC = 0,
+		WII_DISC,
+		WII_WAD,
+		NUMBER_OF_PLATFORMS
+	};
+
 	enum ECountry
 	{
 		COUNTRY_EUROPE = 0,
@@ -86,8 +94,7 @@ public:
 	// 0 is the first disc, 1 is the second disc
 	virtual u8 GetDiscNumber() const { return 0; }
 
-	virtual bool IsWiiDisc() const { return false; }
-	virtual bool IsWadFile() const { return false; }
+	virtual EPlatform GetVolumeType() const = 0;
 	virtual bool SupportsIntegrityCheck() const { return false; }
 	virtual bool CheckIntegrity() const { return false; }
 	virtual bool ChangePartition(u64 offset) { return false; }

Source/Core/DiscIO/VolumeDirectory.cpp

@@ -220,9 +220,9 @@ std::string CVolumeDirectory::GetApploaderDate() const
 	return "VOID";
 }
 
-bool CVolumeDirectory::IsWiiDisc() const
+IVolume::EPlatform CVolumeDirectory::GetVolumeType() const
 {
-	return m_is_wii;
+	return m_is_wii ? WII_DISC : GAMECUBE_DISC;
 }
 
 u64 CVolumeDirectory::GetSize() const

Source/Core/DiscIO/VolumeDirectory.h

@@ -47,7 +47,7 @@ public:
 	u32 GetFSTSize() const override;
 
 	std::string GetApploaderDate() const override;
-	bool IsWiiDisc() const override;
+	EPlatform GetVolumeType() const override;
 
 	ECountry GetCountry() const override;
 

Source/Core/DiscIO/VolumeGC.cpp

@@ -272,6 +272,11 @@ u8 CVolumeGC::GetDiscNumber() const
 	return disc_number;
 }
 
+IVolume::EPlatform CVolumeGC::GetVolumeType() const
+{
+	return GAMECUBE_DISC;
+}
+
 bool CVolumeGC::LoadBannerFile() const
 {
 	// The methods GetNames, GetDescriptions, GetCompany and GetBanner

Source/Core/DiscIO/VolumeGC.h

@@ -37,6 +37,7 @@ public:
 	std::string GetApploaderDate() const override;
 	u8 GetDiscNumber() const override;
 
+	EPlatform GetVolumeType() const override;
 	ECountry GetCountry() const override;
 	u64 GetSize() const override;
 	u64 GetRawSize() const override;

Source/Core/DiscIO/VolumeWad.cpp

@@ -112,9 +112,9 @@ u16 CVolumeWAD::GetRevision() const
 	return Common::swap16(revision);
 }
 
-bool CVolumeWAD::IsWadFile() const
+IVolume::EPlatform CVolumeWAD::GetVolumeType() const
 {
-	return true;
+	return WII_WAD;
 }
 
 std::map<IVolume::ELanguage, std::string> CVolumeWAD::GetNames() const

Source/Core/DiscIO/VolumeWad.h

@@ -36,7 +36,7 @@ public:
 	u32 GetFSTSize() const override { return 0; }
 	std::string GetApploaderDate() const override { return ""; }
 
-	bool IsWadFile() const override;
+	EPlatform GetVolumeType() const override;
 
 	ECountry GetCountry() const override;
 	u64 GetSize() const override;

Source/Core/DiscIO/VolumeWiiCrypted.cpp

@@ -238,9 +238,9 @@ std::string CVolumeWiiCrypted::GetApploaderDate() const
 	return date;
 }
 
-bool CVolumeWiiCrypted::IsWiiDisc() const
+IVolume::EPlatform CVolumeWiiCrypted::GetVolumeType() const
 {
-	return true;
+	return WII_DISC;
 }
 
 u8 CVolumeWiiCrypted::GetDiscNumber() const

Source/Core/DiscIO/VolumeWiiCrypted.h

@@ -37,7 +37,7 @@ public:
 	std::string GetApploaderDate() const override;
 	u8 GetDiscNumber() const override;
 
-	bool IsWiiDisc() const override;
+	EPlatform GetVolumeType() const override;
 	bool SupportsIntegrityCheck() const override { return true; }
 	bool CheckIntegrity() const override;
 	bool ChangePartition(u64 offset) override;