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Don't read from disk when checking volume type

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Should be faster than relying on the OS to cache the magic words.
Also gets rid of the odd recursive call in VolumeDirectory.
This commit is contained in:
JosJuice
2015-01-17 13:21:02 +01:00
parent 11a36ca8e2
commit ace060748b
19 changed files with 61 additions and 56 deletions
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16
Source/Core/DiscIO/VolumeDirectory.cpp
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@ -66,12 +66,7 @@ bool CVolumeDirectory::IsValidDirectory(const std::string& _rDirectory)
bool CVolumeDirectory::Read(u64 _Offset, u64 _Length, u8* _pBuffer, bool decrypt) const
{
// VolumeHandler::IsWii is used here to check whether a Wii disc is used.
// That function calls this function to check a magic word in the disc header,
// so it is important that VolumeHandler::IsWii is not called when the header
// is being read with decrypt=false, as it would result in a stack overflow.
if (!decrypt && (_Offset + _Length >= 0x400) && VolumeHandler::IsWii())
if (!decrypt && (_Offset + _Length >= 0x400) && m_is_wii)
{
// Fully supporting this would require re-encrypting every file that's read.
// Only supporting the areas that IOS allows software to read could be more feasible.
@ -81,7 +76,7 @@ bool CVolumeDirectory::Read(u64 _Offset, u64 _Length, u8* _pBuffer, bool decrypt
return false;
}
if (decrypt && !VolumeHandler::IsWii())
if (decrypt && !m_is_wii)
PanicAlertT("Tried to decrypt data from a non-Wii volume");
// header
@ -210,6 +205,11 @@ std::string CVolumeDirectory::GetApploaderDate() const
return "VOID";
}
bool CVolumeDirectory::IsWiiDisc() const
{
return m_is_wii;
}
u64 CVolumeDirectory::GetSize() const
{
return 0;
@ -253,6 +253,7 @@ void CVolumeDirectory::SetDiskTypeWii()
m_diskHeader[0x1b] = 0xa3;
memset(&m_diskHeader[0x1c], 0, 4);
m_is_wii = true;
m_addressShift = 2;
}
@ -264,6 +265,7 @@ void CVolumeDirectory::SetDiskTypeGC()
m_diskHeader[0x1e] = 0x9f;
m_diskHeader[0x1f] = 0x3d;
m_is_wii = false;
m_addressShift = 0;
}