mirror of
https://github.com/claunia/SabreTools.git
synced 2025-12-16 19:14:27 +00:00
[CHDFile] Remove helper class
This commit is contained in:
Matt Nadareski
286
SabreTools.Library/External/CHDFile.cs
vendored
286
SabreTools.Library/External/CHDFile.cs
vendored
@@ -66,152 +66,21 @@ namespace SabreTools.Library.External
|
||||
/// </remrks>
|
||||
public class CHDFile
|
||||
{
|
||||
/// <summary>
|
||||
/// Information regarding the CHD, mostly unused
|
||||
/// </summary>
|
||||
private class CHD
|
||||
{
|
||||
// Core parameters from the header
|
||||
public ulong m_signature; // signature
|
||||
public uint m_headersize; // size of the header
|
||||
public uint m_version; // version of the header
|
||||
public ulong m_logicalbytes; // logical size of the raw CHD data in bytes
|
||||
public ulong m_mapoffset; // offset of map
|
||||
public ulong m_metaoffset; // offset to first metadata bit
|
||||
public uint m_hunkbytes; // size of each raw hunk in bytes
|
||||
private ulong m_hunkcount; // number of hunks represented
|
||||
public uint m_unitbytes; // size of each unit in bytes
|
||||
public ulong m_unitcount; // number of units represented
|
||||
public CHDCodecType[] m_compression = new CHDCodecType[4]; // array of compression types used
|
||||
// Core parameters from the header
|
||||
public ulong m_signature; // signature
|
||||
public uint m_headersize; // size of the header
|
||||
public uint m_version; // version of the header
|
||||
public ulong m_logicalbytes; // logical size of the raw CHD data in bytes
|
||||
public ulong m_mapoffset; // offset of map
|
||||
public ulong m_metaoffset; // offset to first metadata bit
|
||||
public uint m_hunkbytes; // size of each raw hunk in bytes
|
||||
private ulong m_hunkcount; // number of hunks represented
|
||||
public uint m_unitbytes; // size of each unit in bytes
|
||||
public ulong m_unitcount; // number of units represented
|
||||
public CHDCodecType[] m_compression = new CHDCodecType[4]; // array of compression types used
|
||||
|
||||
// map information
|
||||
public uint m_mapentrybytes; // length of each entry in a map
|
||||
|
||||
/// <summary>
|
||||
/// Parse a CHD v3 header
|
||||
/// </summary>
|
||||
/// <param name="br">Binary reader representing the input stream</param>
|
||||
/// <returns>The extracted SHA-1 on success, null otherwise</returns>
|
||||
public byte[] ParseCHDv3Header(BinaryReader br)
|
||||
{
|
||||
// Set the blank SHA-1 hash
|
||||
byte[] sha1 = new byte[20];
|
||||
|
||||
// Set offsets and defaults
|
||||
m_mapoffset = 120;
|
||||
m_mapentrybytes = 16;
|
||||
|
||||
// Read the CHD flags
|
||||
uint flags = br.ReadUInt32();
|
||||
|
||||
// Determine compression
|
||||
switch (br.ReadUInt32())
|
||||
{
|
||||
case 0: m_compression[0] = CHDCodecType.CHD_CODEC_NONE; break;
|
||||
case 1: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 2: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 3: m_compression[0] = CHDCodecType.CHD_CODEC_AVHUFF; break;
|
||||
default: /* throw CHDERR_UNKNOWN_COMPRESSION; */ return null;
|
||||
}
|
||||
|
||||
m_compression[1] = m_compression[2] = m_compression[3] = CHDCodecType.CHD_CODEC_NONE;
|
||||
|
||||
m_hunkcount = br.ReadUInt32();
|
||||
m_logicalbytes = br.ReadUInt64();
|
||||
m_metaoffset = br.ReadUInt64();
|
||||
|
||||
br.BaseStream.Seek(76, SeekOrigin.Begin);
|
||||
m_hunkbytes = br.ReadUInt32();
|
||||
|
||||
br.BaseStream.Seek(Constants.CHDv3SHA1Offset, SeekOrigin.Begin);
|
||||
sha1 = br.ReadBytes(20);
|
||||
|
||||
// guess at the units based on snooping the metadata
|
||||
// m_unitbytes = guess_unitbytes();
|
||||
m_unitcount = (m_logicalbytes + m_unitbytes - 1) / m_unitbytes;
|
||||
|
||||
return sha1;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Parse a CHD v4 header
|
||||
/// </summary>
|
||||
/// <param name="br">Binary reader representing the input stream</param>
|
||||
/// <returns>The extracted SHA-1 on success, null otherwise</returns>
|
||||
public byte[] ParseCHDv4Header(BinaryReader br)
|
||||
{
|
||||
// Set the blank SHA-1 hash
|
||||
byte[] sha1 = new byte[20];
|
||||
|
||||
// Set offsets and defaults
|
||||
m_mapoffset = 108;
|
||||
m_mapentrybytes = 16;
|
||||
|
||||
// Read the CHD flags
|
||||
uint flags = br.ReadUInt32();
|
||||
|
||||
// Determine compression
|
||||
switch (br.ReadUInt32())
|
||||
{
|
||||
case 0: m_compression[0] = CHDCodecType.CHD_CODEC_NONE; break;
|
||||
case 1: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 2: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 3: m_compression[0] = CHDCodecType.CHD_CODEC_AVHUFF; break;
|
||||
default: /* throw CHDERR_UNKNOWN_COMPRESSION; */ return null;
|
||||
}
|
||||
|
||||
m_compression[1] = m_compression[2] = m_compression[3] = CHDCodecType.CHD_CODEC_NONE;
|
||||
|
||||
m_hunkcount = br.ReadUInt32();
|
||||
m_logicalbytes = br.ReadUInt64();
|
||||
m_metaoffset = br.ReadUInt64();
|
||||
|
||||
br.BaseStream.Seek(44, SeekOrigin.Begin);
|
||||
m_hunkbytes = br.ReadUInt32();
|
||||
|
||||
br.BaseStream.Seek(Constants.CHDv4SHA1Offset, SeekOrigin.Begin);
|
||||
sha1 = br.ReadBytes(20);
|
||||
|
||||
// guess at the units based on snooping the metadata
|
||||
// m_unitbytes = guess_unitbytes();
|
||||
m_unitcount = (m_logicalbytes + m_unitbytes - 1) / m_unitbytes;
|
||||
return sha1;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Parse a CHD v5 header
|
||||
/// </summary>
|
||||
/// <param name="br">Binary reader representing the input stream</param>
|
||||
/// <returns>The extracted SHA-1 on success, null otherwise</returns>
|
||||
public byte[] ParseCHDv5Header(BinaryReader br)
|
||||
{
|
||||
// Set the blank SHA-1 hash
|
||||
byte[] sha1 = new byte[20];
|
||||
|
||||
// Determine compression
|
||||
m_compression[0] = (CHDCodecType)br.ReadUInt32();
|
||||
m_compression[1] = (CHDCodecType)br.ReadUInt32();
|
||||
m_compression[2] = (CHDCodecType)br.ReadUInt32();
|
||||
m_compression[3] = (CHDCodecType)br.ReadUInt32();
|
||||
|
||||
m_logicalbytes = br.ReadUInt64();
|
||||
m_mapoffset = br.ReadUInt64();
|
||||
m_metaoffset = br.ReadUInt64();
|
||||
m_hunkbytes = br.ReadUInt32();
|
||||
m_hunkcount = (m_logicalbytes + m_hunkbytes - 1) / m_hunkbytes;
|
||||
m_unitbytes = br.ReadUInt32();
|
||||
m_unitcount = (m_logicalbytes + m_unitbytes - 1) / m_unitbytes;
|
||||
|
||||
// m_allow_writes = !compressed();
|
||||
|
||||
// determine properties of map entries
|
||||
// m_mapentrybytes = compressed() ? 12 : 4;
|
||||
|
||||
br.BaseStream.Seek(Constants.CHDv5SHA1Offset, SeekOrigin.Begin);
|
||||
sha1 = br.ReadBytes(20);
|
||||
return sha1;
|
||||
}
|
||||
}
|
||||
// map information
|
||||
public uint m_mapentrybytes; // length of each entry in a map
|
||||
|
||||
/// <summary>
|
||||
/// Get internal metadata from a CHD
|
||||
@@ -243,7 +112,7 @@ namespace SabreTools.Library.External
|
||||
Disk datItem = new Disk();
|
||||
|
||||
// Get a CHD object to store the data
|
||||
CHD chd = new CHD();
|
||||
CHDFile chd = new CHDFile();
|
||||
|
||||
// Get a binary reader to make life easier
|
||||
BinaryReader br = new BinaryReader(fs);
|
||||
@@ -317,5 +186,130 @@ namespace SabreTools.Library.External
|
||||
&& datItem.Type == ItemType.Disk
|
||||
&& ((Disk)datItem).SHA1 != null;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Parse a CHD v3 header
|
||||
/// </summary>
|
||||
/// <param name="br">Binary reader representing the input stream</param>
|
||||
/// <returns>The extracted SHA-1 on success, null otherwise</returns>
|
||||
public byte[] ParseCHDv3Header(BinaryReader br)
|
||||
{
|
||||
// Set the blank SHA-1 hash
|
||||
byte[] sha1 = new byte[20];
|
||||
|
||||
// Set offsets and defaults
|
||||
m_mapoffset = 120;
|
||||
m_mapentrybytes = 16;
|
||||
|
||||
// Read the CHD flags
|
||||
uint flags = br.ReadUInt32();
|
||||
|
||||
// Determine compression
|
||||
switch (br.ReadUInt32())
|
||||
{
|
||||
case 0: m_compression[0] = CHDCodecType.CHD_CODEC_NONE; break;
|
||||
case 1: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 2: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 3: m_compression[0] = CHDCodecType.CHD_CODEC_AVHUFF; break;
|
||||
default: /* throw CHDERR_UNKNOWN_COMPRESSION; */ return null;
|
||||
}
|
||||
|
||||
m_compression[1] = m_compression[2] = m_compression[3] = CHDCodecType.CHD_CODEC_NONE;
|
||||
|
||||
m_hunkcount = br.ReadUInt32();
|
||||
m_logicalbytes = br.ReadUInt64();
|
||||
m_metaoffset = br.ReadUInt64();
|
||||
|
||||
br.BaseStream.Seek(76, SeekOrigin.Begin);
|
||||
m_hunkbytes = br.ReadUInt32();
|
||||
|
||||
br.BaseStream.Seek(Constants.CHDv3SHA1Offset, SeekOrigin.Begin);
|
||||
sha1 = br.ReadBytes(20);
|
||||
|
||||
// guess at the units based on snooping the metadata
|
||||
// m_unitbytes = guess_unitbytes();
|
||||
m_unitcount = (m_logicalbytes + m_unitbytes - 1) / m_unitbytes;
|
||||
|
||||
return sha1;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Parse a CHD v4 header
|
||||
/// </summary>
|
||||
/// <param name="br">Binary reader representing the input stream</param>
|
||||
/// <returns>The extracted SHA-1 on success, null otherwise</returns>
|
||||
public byte[] ParseCHDv4Header(BinaryReader br)
|
||||
{
|
||||
// Set the blank SHA-1 hash
|
||||
byte[] sha1 = new byte[20];
|
||||
|
||||
// Set offsets and defaults
|
||||
m_mapoffset = 108;
|
||||
m_mapentrybytes = 16;
|
||||
|
||||
// Read the CHD flags
|
||||
uint flags = br.ReadUInt32();
|
||||
|
||||
// Determine compression
|
||||
switch (br.ReadUInt32())
|
||||
{
|
||||
case 0: m_compression[0] = CHDCodecType.CHD_CODEC_NONE; break;
|
||||
case 1: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 2: m_compression[0] = CHDCodecType.CHD_CODEC_ZLIB; break;
|
||||
case 3: m_compression[0] = CHDCodecType.CHD_CODEC_AVHUFF; break;
|
||||
default: /* throw CHDERR_UNKNOWN_COMPRESSION; */ return null;
|
||||
}
|
||||
|
||||
m_compression[1] = m_compression[2] = m_compression[3] = CHDCodecType.CHD_CODEC_NONE;
|
||||
|
||||
m_hunkcount = br.ReadUInt32();
|
||||
m_logicalbytes = br.ReadUInt64();
|
||||
m_metaoffset = br.ReadUInt64();
|
||||
|
||||
br.BaseStream.Seek(44, SeekOrigin.Begin);
|
||||
m_hunkbytes = br.ReadUInt32();
|
||||
|
||||
br.BaseStream.Seek(Constants.CHDv4SHA1Offset, SeekOrigin.Begin);
|
||||
sha1 = br.ReadBytes(20);
|
||||
|
||||
// guess at the units based on snooping the metadata
|
||||
// m_unitbytes = guess_unitbytes();
|
||||
m_unitcount = (m_logicalbytes + m_unitbytes - 1) / m_unitbytes;
|
||||
return sha1;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Parse a CHD v5 header
|
||||
/// </summary>
|
||||
/// <param name="br">Binary reader representing the input stream</param>
|
||||
/// <returns>The extracted SHA-1 on success, null otherwise</returns>
|
||||
public byte[] ParseCHDv5Header(BinaryReader br)
|
||||
{
|
||||
// Set the blank SHA-1 hash
|
||||
byte[] sha1 = new byte[20];
|
||||
|
||||
// Determine compression
|
||||
m_compression[0] = (CHDCodecType)br.ReadUInt32();
|
||||
m_compression[1] = (CHDCodecType)br.ReadUInt32();
|
||||
m_compression[2] = (CHDCodecType)br.ReadUInt32();
|
||||
m_compression[3] = (CHDCodecType)br.ReadUInt32();
|
||||
|
||||
m_logicalbytes = br.ReadUInt64();
|
||||
m_mapoffset = br.ReadUInt64();
|
||||
m_metaoffset = br.ReadUInt64();
|
||||
m_hunkbytes = br.ReadUInt32();
|
||||
m_hunkcount = (m_logicalbytes + m_hunkbytes - 1) / m_hunkbytes;
|
||||
m_unitbytes = br.ReadUInt32();
|
||||
m_unitcount = (m_logicalbytes + m_unitbytes - 1) / m_unitbytes;
|
||||
|
||||
// m_allow_writes = !compressed();
|
||||
|
||||
// determine properties of map entries
|
||||
// m_mapentrybytes = compressed() ? 12 : 4;
|
||||
|
||||
br.BaseStream.Seek(Constants.CHDv5SHA1Offset, SeekOrigin.Begin);
|
||||
sha1 = br.ReadBytes(20);
|
||||
return sha1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user