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DiscScrubber: Convert into a class

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Allows potential multiple scrubbers to run at once. Also gets rid of the
need to explicitly clean up resources.
This commit is contained in:
Lioncash
2017-01-04 14:31:38 -05:00
parent 389f8297c3
commit 4a9bc2340b
3 changed files with 96 additions and 107 deletions
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120
Source/Core/DiscIO/DiscScrubber.cpp
View File

@ -20,63 +20,12 @@
namespace DiscIO
{
namespace DiscScrubber
{
#define CLUSTER_SIZE 0x8000
static u8* m_FreeTable = nullptr;
static u64 m_FileSize;
static u64 m_BlockCount;
static u32 m_BlockSize;
static int m_BlocksPerCluster;
static bool m_isScrubbing = false;
DiscScrubber::DiscScrubber() = default;
DiscScrubber::~DiscScrubber() = default;
static std::string m_Filename;
static std::unique_ptr<IVolume> s_disc;
struct SPartitionHeader
{
u8* Ticket[0x2a4];
u32 TMDSize;
u64 TMDOffset;
u32 CertChainSize;
u64 CertChainOffset;
// H3Size is always 0x18000
u64 H3Offset;
u64 DataOffset;
u64 DataSize;
// TMD would be here
u64 DOLOffset;
u64 DOLSize;
u64 FSTOffset;
u64 FSTSize;
u32 ApploaderSize;
u32 ApploaderTrailerSize;
};
struct SPartition
{
u32 GroupNumber;
u32 Number;
u64 Offset;
u32 Type;
SPartitionHeader Header;
};
struct SPartitionGroup
{
u32 numPartitions;
u64 PartitionsOffset;
std::vector<SPartition> PartitionsVec;
};
static SPartitionGroup PartitionGroup[4];
void MarkAsUsed(u64 _Offset, u64 _Size);
void MarkAsUsedE(u64 partition_data_offset, u64 offset, u64 size);
bool ReadFromVolume(u64 _Offset, u32& _Buffer, bool _Decrypt);
bool ReadFromVolume(u64 _Offset, u64& _Buffer, bool _Decrypt);
bool ParseDisc();
bool ParsePartitionData(SPartition& _rPartition);
bool SetupScrub(const std::string& filename, int block_size)
bool DiscScrubber::SetupScrub(const std::string& filename, int block_size)
{
bool success = true;
m_Filename = filename;
@ -89,41 +38,36 @@ bool SetupScrub(const std::string& filename, int block_size)
return false;
}
m_BlocksPerCluster = CLUSTER_SIZE / m_BlockSize;
s_disc = CreateVolumeFromFilename(filename);
if (!s_disc)
m_disc = CreateVolumeFromFilename(filename);
if (!m_disc)
return false;
m_FileSize = s_disc->GetSize();
m_FileSize = m_disc->GetSize();
u32 numClusters = (u32)(m_FileSize / CLUSTER_SIZE);
// Warn if not DVD5 or DVD9 size
if (numClusters != 0x23048 && numClusters != 0x46090)
{
WARN_LOG(DISCIO, "%s is not a standard sized Wii disc! (%x blocks)", filename.c_str(),
numClusters);
}
// Table of free blocks
m_FreeTable = new u8[numClusters];
std::fill(m_FreeTable, m_FreeTable + numClusters, 1);
m_FreeTable.resize(numClusters, 1);
// Fill out table of free blocks
success = ParseDisc();
// Done with it; need it closed for the next part
s_disc.reset();
m_disc.reset();
m_BlockCount = 0;
// Let's not touch the file if we've failed up to here :p
if (!success)
Cleanup();
m_isScrubbing = success;
return success;
}
size_t GetNextBlock(File::IOFile& in, u8* buffer)
size_t DiscScrubber::GetNextBlock(File::IOFile& in, u8* buffer)
{
u64 CurrentOffset = m_BlockCount * m_BlockSize;
u64 i = CurrentOffset / CLUSTER_SIZE;
@ -146,19 +90,7 @@ size_t GetNextBlock(File::IOFile& in, u8* buffer)
return ReadBytes;
}
void Cleanup()
{
if (m_FreeTable)
delete[] m_FreeTable;
m_FreeTable = nullptr;
m_FileSize = 0;
m_BlockCount = 0;
m_BlockSize = 0;
m_BlocksPerCluster = 0;
m_isScrubbing = false;
}
void MarkAsUsed(u64 _Offset, u64 _Size)
void DiscScrubber::MarkAsUsed(u64 _Offset, u64 _Size)
{
u64 CurrentOffset = _Offset;
u64 EndOffset = CurrentOffset + _Size;
@ -173,7 +105,7 @@ void MarkAsUsed(u64 _Offset, u64 _Size)
}
// Compensate for 0x400 (SHA-1) per 0x8000 (cluster), and round to whole clusters
void MarkAsUsedE(u64 partition_data_offset, u64 offset, u64 size)
void DiscScrubber::MarkAsUsedE(u64 partition_data_offset, u64 offset, u64 size)
{
u64 first_cluster_start = offset / 0x7c00 * CLUSTER_SIZE + partition_data_offset;
@ -192,21 +124,21 @@ void MarkAsUsedE(u64 partition_data_offset, u64 offset, u64 size)
}
// Helper functions for reading the BE volume
bool ReadFromVolume(u64 _Offset, u32& _Buffer, bool _Decrypt)
bool DiscScrubber::ReadFromVolume(u64 _Offset, u32& _Buffer, bool _Decrypt)
{
return s_disc->ReadSwapped(_Offset, &_Buffer, _Decrypt);
return m_disc->ReadSwapped(_Offset, &_Buffer, _Decrypt);
}
bool ReadFromVolume(u64 _Offset, u64& _Buffer, bool _Decrypt)
bool DiscScrubber::ReadFromVolume(u64 _Offset, u64& _Buffer, bool _Decrypt)
{
u32 temp_buffer;
if (!s_disc->ReadSwapped(_Offset, &temp_buffer, _Decrypt))
if (!m_disc->ReadSwapped(_Offset, &temp_buffer, _Decrypt))
return false;
_Buffer = static_cast<u64>(temp_buffer) << 2;
return true;
}
bool ParseDisc()
bool DiscScrubber::ParseDisc()
{
// Mark the header as used - it's mostly 0s anyways
MarkAsUsed(0, 0x50000);
@ -264,24 +196,24 @@ bool ParseDisc()
}
// Operations dealing with encrypted space are done here - the volume is swapped to allow this
bool ParsePartitionData(SPartition& partition)
bool DiscScrubber::ParsePartitionData(SPartition& partition)
{
bool parsed_ok = true;
// Switch out the main volume temporarily
std::unique_ptr<IVolume> old_volume;
s_disc.swap(old_volume);
m_disc.swap(old_volume);
// Ready some stuff
s_disc = CreateVolumeFromFilename(m_Filename, partition.GroupNumber, partition.Number);
if (s_disc == nullptr)
m_disc = CreateVolumeFromFilename(m_Filename, partition.GroupNumber, partition.Number);
if (m_disc == nullptr)
{
ERROR_LOG(DISCIO, "Failed to create volume from file %s", m_Filename.c_str());
s_disc.swap(old_volume);
m_disc.swap(old_volume);
return false;
}
std::unique_ptr<IFileSystem> filesystem(CreateFileSystem(s_disc.get()));
std::unique_ptr<IFileSystem> filesystem(CreateFileSystem(m_disc.get()));
if (!filesystem)
{
ERROR_LOG(DISCIO, "Failed to create filesystem for group %d partition %u",
@ -321,11 +253,9 @@ bool ParsePartitionData(SPartition& partition)
}
// Swap back
s_disc.swap(old_volume);
m_disc.swap(old_volume);
return parsed_ok;
}
} // namespace DiscScrubber
} // namespace DiscIO