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DiscIO: Add parameters to BlobReader::SupportsReadWiiDecrypted

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It's possible (but rare) for a WIA or RVZ file to support
this for some partitions but not all, and for the game and
the blob code to disagree on how large a partition is.
This commit is contained in:
JosJuice
2020-08-29 15:12:02 +02:00
parent 800b2480ec
commit 047bb80337
7 changed files with 72 additions and 34 deletions
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51
Source/Core/DiscIO/WIABlob.cpp
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@ -413,28 +413,55 @@ bool WIARVZFileReader<RVZ>::Read(u64 offset, u64 size, u8* out_ptr)
}
template <bool RVZ>
bool WIARVZFileReader<RVZ>::SupportsReadWiiDecrypted() const
const typename WIARVZFileReader<RVZ>::PartitionEntry*
WIARVZFileReader<RVZ>::GetPartition(u64 partition_data_offset, u32* partition_first_sector) const
{
return !m_partition_entries.empty();
const auto it = m_data_entries.upper_bound(partition_data_offset);
if (it == m_data_entries.end() || !it->second.is_partition)
return nullptr;
const PartitionEntry* partition = &m_partition_entries[it->second.index];
*partition_first_sector = Common::swap32(partition->data_entries[0].first_sector);
if (partition_data_offset != *partition_first_sector * VolumeWii::BLOCK_TOTAL_SIZE)
return nullptr;
return partition;
}
template <bool RVZ>
bool WIARVZFileReader<RVZ>::SupportsReadWiiDecrypted(u64 offset, u64 size,
u64 partition_data_offset) const
{
u32 partition_first_sector;
const PartitionEntry* partition = GetPartition(partition_data_offset, &partition_first_sector);
if (!partition)
return false;
for (const PartitionDataEntry& data : partition->data_entries)
{
const u32 start_sector = Common::swap32(data.first_sector) - partition_first_sector;
const u32 end_sector = start_sector + Common::swap32(data.number_of_sectors);
if (offset + size <= end_sector * VolumeWii::BLOCK_DATA_SIZE)
return true;
}
return false;
}
template <bool RVZ>
bool WIARVZFileReader<RVZ>::ReadWiiDecrypted(u64 offset, u64 size, u8* out_ptr,
u64 partition_data_offset)
{
u32 partition_first_sector;
const PartitionEntry* partition = GetPartition(partition_data_offset, &partition_first_sector);
if (!partition)
return false;
const u64 chunk_size = Common::swap32(m_header_2.chunk_size) * VolumeWii::BLOCK_DATA_SIZE /
VolumeWii::BLOCK_TOTAL_SIZE;
const auto it = m_data_entries.upper_bound(partition_data_offset);
if (it == m_data_entries.end() || !it->second.is_partition)
return false;
const PartitionEntry& partition = m_partition_entries[it->second.index];
const u32 partition_first_sector = Common::swap32(partition.data_entries[0].first_sector);
if (partition_data_offset != partition_first_sector * VolumeWii::BLOCK_TOTAL_SIZE)
return false;
for (const PartitionDataEntry& data : partition.data_entries)
for (const PartitionDataEntry& data : partition->data_entries)
{
if (size == 0)
return true;