mirror of
https://github.com/libretro/Play-.git
synced 2024-11-27 18:50:28 +00:00
131 lines
3.1 KiB
C++
131 lines
3.1 KiB
C++
#include <stdexcept>
|
|
#include <cstring>
|
|
#include "MdsDiscImage.h"
|
|
|
|
enum MDS_MEDIUM : uint16
|
|
{
|
|
CD = 0,
|
|
CD_R = 1,
|
|
CD_RW = 2,
|
|
DVD = 0x10,
|
|
DVD_MINUS_R = 0x12,
|
|
};
|
|
|
|
static const char g_mdsSignature[17] = "MEDIA DESCRIPTOR";
|
|
|
|
struct MDS_HEADER
|
|
{
|
|
uint8 signature[0x10];
|
|
uint8 version[2];
|
|
MDS_MEDIUM mediumType;
|
|
uint16 sessionCount;
|
|
uint16 dummy1[2];
|
|
uint16 bcaLength;
|
|
uint32 dummy2[2];
|
|
uint32 bcaDataOffset;
|
|
uint32 dummy3[6];
|
|
uint32 discStructuresOffset;
|
|
uint32 dummy4[3];
|
|
uint32 sessionsBlocksOffset;
|
|
uint32 dpmBlocksOffset;
|
|
};
|
|
static_assert(sizeof(MDS_HEADER) == 88, "MDS_HEADER must be 88 bytes long.");
|
|
|
|
//Read Disc Structure - Command 0x00
|
|
struct DVD_RDS_PHYSICALFORMATINFO
|
|
{
|
|
uint8 partVersion : 4;
|
|
uint8 bookType : 4;
|
|
uint8 maximumRate : 4;
|
|
uint8 discSize : 4;
|
|
uint8 layerType : 4;
|
|
uint8 trackPath : 1;
|
|
uint8 numberOfLayers : 2;
|
|
uint8 reserved0 : 1;
|
|
uint8 trackDensity : 4;
|
|
uint8 linearDensity : 4;
|
|
uint8 startSectorNumber[4];
|
|
uint8 endSectorNumber[4];
|
|
uint8 endSectorNumberLayer0[4];
|
|
uint8 reserved1 : 7;
|
|
uint8 bcaFlag : 1;
|
|
uint8 mediaSpecific[2031];
|
|
|
|
uint32 GetStartSectorNumber() const
|
|
{
|
|
return (startSectorNumber[1] << 16) | (startSectorNumber[2] << 8) | (startSectorNumber[3]);
|
|
}
|
|
|
|
uint32 GetEndSectorNumber() const
|
|
{
|
|
return (endSectorNumber[1] << 16) | (endSectorNumber[2] << 8) | (endSectorNumber[3]);
|
|
}
|
|
};
|
|
static_assert(sizeof(DVD_RDS_PHYSICALFORMATINFO) == 2048, "DVD_RDS_PHYSICALFORMATINFO must be 2048 bytes long.");
|
|
|
|
//Read Disc Structure - Command 0x01
|
|
struct DVD_RDS_COPYRIGHTINFO
|
|
{
|
|
uint32 info;
|
|
};
|
|
static_assert(sizeof(DVD_RDS_COPYRIGHTINFO) == 4, "DVD_RDS_COPYRIGHTINFO must be 4 bytes long.");
|
|
|
|
//Read Disc Structure - Command 0x04
|
|
struct DVD_RDS_MANUFACTURINGINFO
|
|
{
|
|
uint8 info[2048];
|
|
};
|
|
static_assert(sizeof(DVD_RDS_MANUFACTURINGINFO) == 2048, "DVD_RDS_MANUFACTURINGINFO must be 2048 bytes long.");
|
|
|
|
CMdsDiscImage::CMdsDiscImage(Framework::CStream& inputStream)
|
|
{
|
|
ParseMds(inputStream);
|
|
}
|
|
|
|
bool CMdsDiscImage::IsDualLayer() const
|
|
{
|
|
return m_isDualLayer;
|
|
}
|
|
|
|
uint32 CMdsDiscImage::GetLayerBreak() const
|
|
{
|
|
return m_layerBreak;
|
|
}
|
|
|
|
void CMdsDiscImage::ParseMds(Framework::CStream& inputStream)
|
|
{
|
|
MDS_HEADER header = {};
|
|
inputStream.Read(&header, sizeof(MDS_HEADER));
|
|
if(memcmp(header.signature, g_mdsSignature, 16) != 0)
|
|
{
|
|
throw std::runtime_error("Invalid MDS file.");
|
|
}
|
|
if(header.version[0] != 0x01)
|
|
{
|
|
throw std::runtime_error("Invalid MDS file version.");
|
|
}
|
|
|
|
if(header.mediumType == MDS_MEDIUM::DVD)
|
|
{
|
|
inputStream.Seek(header.discStructuresOffset, Framework::STREAM_SEEK_SET);
|
|
|
|
DVD_RDS_COPYRIGHTINFO copyrightInfo = {};
|
|
inputStream.Read(©rightInfo, sizeof(DVD_RDS_COPYRIGHTINFO));
|
|
|
|
DVD_RDS_MANUFACTURINGINFO manufacturingInfo = {};
|
|
inputStream.Read(&manufacturingInfo, sizeof(DVD_RDS_MANUFACTURINGINFO));
|
|
|
|
DVD_RDS_PHYSICALFORMATINFO physicalFormatInfo = {};
|
|
inputStream.Read(&physicalFormatInfo, sizeof(DVD_RDS_PHYSICALFORMATINFO));
|
|
|
|
uint32 startSectorNumber = physicalFormatInfo.GetStartSectorNumber();
|
|
uint32 endSectorNumber = physicalFormatInfo.GetEndSectorNumber();
|
|
|
|
if(physicalFormatInfo.numberOfLayers == 1)
|
|
{
|
|
m_isDualLayer = true;
|
|
m_layerBreak = endSectorNumber - startSectorNumber + 1;
|
|
}
|
|
}
|
|
}
|