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DiscIO: Add GetContent() for reading content from WADs

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Direct access to the WAD bytes is required to read contents with proper
padding data (since they can sometimes end up being outside of the
data app section). Allowing the whole buffer to be accessed directly
would be error prone, so this commit adds GetContent() to WiiWAD
for getting raw content data by index.
This commit is contained in:
Léo Lam
2017-05-14 12:05:43 +02:00
parent 6916a3d85b
commit afcda22da9
2 changed files with 35 additions and 12 deletions
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39
Source/Core/DiscIO/WiiWad.cpp
View File

@ -44,25 +44,24 @@ bool IsWiiWAD(const CBlobBigEndianReader& reader)
}
} // Anonymous namespace
WiiWAD::WiiWAD(const std::string& name)
WiiWAD::WiiWAD(const std::string& name) : m_reader(CreateBlobReader(name))
{
std::unique_ptr<IBlobReader> reader(CreateBlobReader(name));
if (reader == nullptr || File::IsDirectory(name))
if (m_reader == nullptr || File::IsDirectory(name))
{
m_valid = false;
return;
}
m_valid = ParseWAD(*reader);
m_valid = ParseWAD();
}
WiiWAD::~WiiWAD()
{
}
bool WiiWAD::ParseWAD(IBlobReader& reader)
bool WiiWAD::ParseWAD()
{
CBlobBigEndianReader big_endian_reader(reader);
CBlobBigEndianReader big_endian_reader(*m_reader);
if (!IsWiiWAD(big_endian_reader))
return false;
@ -86,18 +85,36 @@ bool WiiWAD::ParseWAD(IBlobReader& reader)
_dbg_assert_msg_(BOOT, reserved == 0x00, "WiiWAD: Reserved must be 0x00");
u32 offset = 0x40;
m_certificate_chain = CreateWADEntry(reader, certificate_chain_size, offset);
m_certificate_chain = CreateWADEntry(*m_reader, certificate_chain_size, offset);
offset += Common::AlignUp(certificate_chain_size, 0x40);
m_ticket.SetBytes(CreateWADEntry(reader, ticket_size, offset));
m_ticket.SetBytes(CreateWADEntry(*m_reader, ticket_size, offset));
offset += Common::AlignUp(ticket_size, 0x40);
m_tmd.SetBytes(CreateWADEntry(reader, tmd_size, offset));
m_tmd.SetBytes(CreateWADEntry(*m_reader, tmd_size, offset));
offset += Common::AlignUp(tmd_size, 0x40);
m_data_app = CreateWADEntry(reader, data_app_size, offset);
m_data_app_offset = offset;
m_data_app = CreateWADEntry(*m_reader, data_app_size, offset);
offset += Common::AlignUp(data_app_size, 0x40);
m_footer = CreateWADEntry(reader, footer_size, offset);
m_footer = CreateWADEntry(*m_reader, footer_size, offset);
offset += Common::AlignUp(footer_size, 0x40);
return true;
}
std::vector<u8> WiiWAD::GetContent(u16 index) const
{
u64 offset = m_data_app_offset;
for (const IOS::ES::Content& content : m_tmd.GetContents())
{
const u64 aligned_size = Common::AlignUp(content.size, 0x40);
if (content.index == index)
{
std::vector<u8> data(aligned_size);
if (!m_reader->Read(offset, aligned_size, data.data()))
return {};
return data;
}
offset += aligned_size;
}
return {};
}
} // namespace DiscIO