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CDImagePBP: Split disc loading into separate method

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This commit is contained in:
Albert Liu 2021-03-18 16:51:09 -07:00
parent 25d4060bce
commit 02e8e2b071
1 changed files with 38 additions and 17 deletions
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55
src/common/cd_image_pbp.cpp
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@ -4,6 +4,7 @@
#include "file_system.h"
#include "log.h"
#include "pbp_types.h"
#include "string.h"
#include "string_util.h"
#include "zlib.h"
#include <array>
@ -51,6 +52,8 @@ private:
bool InitDecompressionStream();
bool DecompressBlock(BlockInfo block_info);
bool OpenDisc(u32 index, Common::Error* error);
FILE* m_file = nullptr;
PBPHeader m_pbp_header;
@ -58,9 +61,8 @@ private:
SFOTable m_sfo_table;
SFOIndexTable m_sfo_index_table;
// Absolute offsets to ISO headers for multidisc file
std::vector<u32> m_multidisc_file_offsets;
u32 m_current_disc;
// Absolute offsets to ISO headers, size is the number of discs in the file
std::vector<u32> m_disc_offsets;
// Absolute offsets and sizes of blocks in m_file
std::array<BlockInfo, BLOCK_TABLE_NUM_ENTRIES> m_blockinfo_table;
@ -376,7 +378,6 @@ bool CDImagePBP::Open(const char* filename, Common::Error* error)
if (fread(data_psar_magic, sizeof(data_psar_magic), 1, m_file) != 1)
return false;
u32 iso_header_start = m_pbp_header.data_psar_offset;
if (strncmp(data_psar_magic, "PSTITLEIMG000000", 16) == 0) // Multi-disc header found
{
// For multi-disc, the five disc offsets are located at data_psar_offset + 0x200. Non-present discs have an offset
@ -393,7 +394,7 @@ bool CDImagePBP::Open(const char* filename, Common::Error* error)
// Ignore encrypted files
if (disc_table[0] == 0x44475000) // "\0PGD"
{
Log_ErrorPrint("Encrypted PBP images are not supported");
Log_ErrorPrintf("Encrypted PBP images are not supported, skipping %s", m_filename.c_str());
if (error)
error->SetMessage("Encrypted PBP images are not supported");
@ -404,24 +405,44 @@ bool CDImagePBP::Open(const char* filename, Common::Error* error)
for (u32 i = 0; i < DISC_TABLE_NUM_ENTRIES; i++)
{
if (disc_table[i] != 0)
m_multidisc_file_offsets.push_back(m_pbp_header.data_psar_offset + disc_table[i]);
m_disc_offsets.push_back(m_pbp_header.data_psar_offset + disc_table[i]);
else
break;
}
if (m_multidisc_file_offsets.size() < 2)
if (m_disc_offsets.size() < 2)
{
Log_ErrorPrintf("Invalid number of discs (%u) in multi-disc PBP file",
static_cast<u32>(m_multidisc_file_offsets.size()));
Log_ErrorPrintf("Invalid number of discs (%u) in multi-disc PBP file", static_cast<u32>(m_disc_offsets.size()));
return false;
}
// Default to first disc for now, we can change this later
iso_header_start = m_multidisc_file_offsets[0];
m_current_disc = 0;
}
else // Single-disc
{
m_disc_offsets.push_back(m_pbp_header.data_psar_offset);
}
// Default to first disc for now
return OpenDisc(0, error);
}
bool CDImagePBP::OpenDisc(u32 index, Common::Error* error)
{
if (index >= m_disc_offsets.size())
{
Log_ErrorPrintf("File does not contain disc %u", index + 1);
if (error)
error->SetMessage(TinyString::FromFormat("File does not contain disc %u", index + 1));
return false;
}
m_current_block = static_cast<u32>(-1);
m_blockinfo_table.fill({});
m_toc.fill({});
m_decompressed_block.fill(0x00);
m_compressed_block.clear();
// Go to ISO header
const u32 iso_header_start = m_disc_offsets[index];
if (fseek(m_file, iso_header_start, SEEK_SET) != 0)
return false;
@ -445,7 +466,7 @@ bool CDImagePBP::Open(const char* filename, Common::Error* error)
if (pgd_magic == 0x44475000) // "\0PGD"
{
Log_ErrorPrint("Encrypted PBP images are not supported");
Log_ErrorPrintf("Encrypted PBP images are not supported, skipping %s", m_filename.c_str());
if (error)
error->SetMessage("Encrypted PBP images are not supported");
@ -624,14 +645,14 @@ bool CDImagePBP::Open(const char* filename, Common::Error* error)
return false;
}
if (m_multidisc_file_offsets.size() > 0)
if (m_disc_offsets.size() > 1)
{
std::string sbi_path =
FileSystem::StripExtension(filename) + StringUtil::StdStringFromFormat("_%u.sbi", m_current_disc + 1);
FileSystem::StripExtension(m_filename) + StringUtil::StdStringFromFormat("_%u.sbi", index + 1);
m_sbi.LoadSBI(sbi_path.c_str());
}
else
m_sbi.LoadSBI(FileSystem::ReplaceExtension(filename, "sbi").c_str());
m_sbi.LoadSBI(FileSystem::ReplaceExtension(m_filename, "sbi").c_str());
return Seek(1, Position{0, 0, 0});
}