private void UpdateHeader()
{
var dataOffset = HcaInfo.DataOffset;
var buffer = new byte[dataOffset];
var sourceStream = SourceStream;
var outputStream = _outputStream;
sourceStream.Seek(0, SeekOrigin.Begin);
sourceStream.Read(buffer, 0, buffer.Length);
sourceStream.Seek(0, SeekOrigin.Begin);
uint v;
// HCA
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.HCA))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(HcaHeader)));
}
// FMT
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.FMT))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(FormatHeader)));
}
// COMP / DEC
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.COMP))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(CompressHeader)));
}
else if (MagicValues.IsMagicMatch(v, MagicValues.DEC))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(DecodeHeader)));
}
// VBR
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.VBR))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(VbrHeader)));
}
// ATH
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.ATH))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(AthHeader)));
}
// LOOP
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.LOOP))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(LoopHeader)));
}
// CIPH
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.CIPH))
{
ProcessHeaderSignature(sourceStream, buffer);
var cipherOffset = (int)(sourceStream.Position + 4);
var u = (ushort)_ccTo.CipherType;
if (BitConverter.IsLittleEndian)
{
u = DereToreHelper.SwapEndian(u);
}
var cipherTypeBytes = BitConverter.GetBytes(u);
buffer[cipherOffset] = cipherTypeBytes[0];
buffer[cipherOffset + 1] = cipherTypeBytes[1];
}
// RVA
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.RVA))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(RvaHeader)));
}
// COMM
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.COMM))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(Marshal.SizeOf(typeof(CommentHeader)));
byte tmpByte;
do
{
tmpByte = (byte)sourceStream.ReadByte();
} while (tmpByte != 0);
}
// PAD (undocumented)
v = sourceStream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.PAD))
{
ProcessHeaderSignature(sourceStream, buffer);
sourceStream.Skip(4);
}
FixDataBlock(buffer);
outputStream.Write(buffer, 0, buffer.Length);
}
internal void ParseHeaders()
{
var stream = SourceStream;
uint v;
var hcaInfo = new HcaInfo();
// HCA
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.HCA))
{
HcaHeader header;
stream.Read(out header);
hcaInfo.Version = DereToreHelper.SwapEndian(header.Version);
hcaInfo.DataOffset = DereToreHelper.SwapEndian(header.DataOffset);
}
else
{
throw new HcaException("Missing HCA signature.", ActionResult.MagicNotMatch);
}
// FMT
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.FMT))
{
FormatHeader header;
stream.Read(out header);
hcaInfo.ChannelCount = header.Channels;
hcaInfo.SamplingRate = DereToreHelper.SwapEndian(header.SamplingRate << 8);
hcaInfo.BlockCount = DereToreHelper.SwapEndian(header.Blocks);
hcaInfo.FmtR01 = DereToreHelper.SwapEndian(header.R01);
hcaInfo.FmtR02 = DereToreHelper.SwapEndian(header.R02);
if (hcaInfo.ChannelCount < 1 || hcaInfo.ChannelCount > 16)
{
throw new HcaException($"Channel count should be between 1 and 16, read {hcaInfo.ChannelCount}.", ActionResult.InvalidFieldValue);
}
if (hcaInfo.SamplingRate < 1 || hcaInfo.SamplingRate > 0x7fffff)
{
throw new HcaException($"Sampling rate should be between 1 and {0x7fffffff}, read {hcaInfo.SamplingRate}.", ActionResult.InvalidFieldValue);
}
}
else
{
throw new HcaException("Missing FMT signature.", ActionResult.MagicNotMatch);
}
// COMP / DEC
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.COMP))
{
CompressHeader header;
stream.Read(out header);
hcaInfo.BlockSize = DereToreHelper.SwapEndian(header.BlockSize);
hcaInfo.CompR01 = header.R01;
hcaInfo.CompR02 = header.R02;
hcaInfo.CompR03 = header.R03;
hcaInfo.CompR04 = header.R04;
hcaInfo.CompR05 = header.R05;
hcaInfo.CompR06 = header.R06;
hcaInfo.CompR07 = header.R07;
hcaInfo.CompR08 = header.R08;
if ((hcaInfo.BlockSize < 8 || hcaInfo.BlockSize > 0xffff) && hcaInfo.BlockSize != 0)
{
throw new HcaException($"Block size should be between 8 and {0xffff}, read {hcaInfo.BlockSize}.", ActionResult.InvalidFieldValue);
}
if (!(hcaInfo.CompR01 <= hcaInfo.CompR02 && hcaInfo.CompR02 <= 0x1f))
{
throw new HcaException($"CompR01 should be less than or equal to CompR02, and CompR02 should be less than or equal to {0x1f}, read {hcaInfo.CompR01} and {hcaInfo.CompR02}.", ActionResult.InvalidFieldValue);
}
}
else if (MagicValues.IsMagicMatch(v, MagicValues.DEC))
{
DecodeHeader header;
stream.Read(out header);
hcaInfo.CompR01 = header.R01;
hcaInfo.CompR02 = header.R02;
hcaInfo.CompR03 = header.R04;
hcaInfo.CompR04 = header.R03;
hcaInfo.CompR05 = (ushort)(header.Count1 + 1);
hcaInfo.CompR06 = (ushort)((header.EnableCount2 ? header.Count2 : header.Count1) + 1);
hcaInfo.CompR07 = (ushort)(hcaInfo.CompR05 - hcaInfo.CompR06);
hcaInfo.CompR08 = 0;
if ((hcaInfo.BlockSize < 8 || hcaInfo.BlockSize > 0xffff) && hcaInfo.BlockSize != 0)
{
throw new HcaException($"Block size should be between 8 and {0xffff}, read {hcaInfo.BlockSize}.", ActionResult.InvalidFieldValue);
}
if (!(hcaInfo.CompR01 <= hcaInfo.CompR02 && hcaInfo.CompR02 <= 0x1f))
{
throw new HcaException($"CompR01 should be less than or equal to CompR02, and CompR02 should be less than or equal to {0x1f}, read {hcaInfo.CompR01} and {hcaInfo.CompR02}.", ActionResult.InvalidFieldValue);
}
if (hcaInfo.CompR03 == 0)
{
hcaInfo.CompR03 = 1;
}
}
else
{
throw new HcaException("Missing COMP/DEC signature.", ActionResult.MagicNotMatch);
}
// VBR
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.VBR))
{
VbrHeader header;
stream.Read(out header);
hcaInfo.VbrR01 = DereToreHelper.SwapEndian(header.R01);
hcaInfo.VbrR02 = DereToreHelper.SwapEndian(header.R02);
if (!(hcaInfo.BlockSize == 0 && hcaInfo.VbrR01 < 0x01ff))
{
throw new HcaException($"VbrR01 should be less than {0x01ff} in VBR HCA.", ActionResult.InvalidFieldValue);
}
}
else
{
hcaInfo.VbrR01 = hcaInfo.VbrR02 = 0;
}
// ATH
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.ATH))
{
AthHeader header;
stream.Read(out header);
hcaInfo.AthType = header.Type;
}
else
{
hcaInfo.AthType = (ushort)(hcaInfo.Version < 0x0200 ? 1 : 0);
}
// LOOP
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.LOOP))
{
LoopHeader header;
stream.Read(out header);
hcaInfo.LoopStart = DereToreHelper.SwapEndian(header.LoopStart);
hcaInfo.LoopEnd = DereToreHelper.SwapEndian(header.LoopEnd);
hcaInfo.LoopR01 = DereToreHelper.SwapEndian(header.R01);
hcaInfo.LoopR02 = DereToreHelper.SwapEndian(header.R02);
hcaInfo.LoopFlag = true;
}
else
{
hcaInfo.LoopStart = 0;
hcaInfo.LoopEnd = 0;
hcaInfo.LoopR01 = 0;
hcaInfo.LoopR02 = 0x400;
hcaInfo.LoopFlag = false;
}
// CIPH
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.CIPH))
{
CipherHeader header;
stream.Read(out header);
hcaInfo.CipherType = (CipherType)DereToreHelper.SwapEndian(header.Type);
}
else
{
hcaInfo.CipherType = CipherType.NoChipher;
}
// RVA
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.RVA))
{
RvaHeader header;
stream.Read(out header);
hcaInfo.RvaVolume = DereToreHelper.SwapEndian(header.Volume);
}
else
{
hcaInfo.RvaVolume = 1;
}
// COMM
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.COMM))
{
CommentHeader header;
stream.Read(out header);
hcaInfo.CommentLength = header.Length;
var tmpCommentCharList = new List <byte>();
byte tmpByte;
do
{
tmpByte = (byte)stream.ReadByte();
tmpCommentCharList.Add(tmpByte);
} while (tmpByte != 0);
hcaInfo.Comment = tmpCommentCharList.ToArray();
}
else
{
hcaInfo.CommentLength = 0;
hcaInfo.Comment = null;
}
// PAD (undocumented)
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.PAD))
{
stream.Skip(4); // Length of 'pad '
}
if (hcaInfo.CompR03 == 0)
{
hcaInfo.CompR03 = 1;
}
if (hcaInfo.CompR01 != 1 || hcaInfo.CompR02 != 0xf)
{
throw new HcaException($"Expected CompR01=1, CompR02=15, read {hcaInfo.CompR01}, {hcaInfo.CompR02}.", ActionResult.InvalidFieldValue);
}
hcaInfo.CompR09 = HcaHelper.Ceil2((uint)(hcaInfo.CompR05 - (hcaInfo.CompR06 + hcaInfo.CompR07)), hcaInfo.CompR08);
HcaInfo = hcaInfo;
}