private int DecodeToWaveR32(byte[] blockData)
{
var hcaInfo = HcaInfo;
if (blockData == null)
{
throw new ArgumentNullException(nameof(blockData));
}
if (blockData.Length < hcaInfo.BlockSize)
{
throw new HcaException(ErrorMessages.GetInvalidParameter("blockData.Length"), ActionResult.InvalidParameter);
}
var checksum = HcaHelper.Checksum(blockData, 0);
if (checksum != 0)
{
throw new HcaException(ErrorMessages.GetChecksumNotMatch(0, checksum), ActionResult.ChecksumNotMatch);
}
_cipher.Decrypt(blockData);
var d = new DataBits(blockData, hcaInfo.BlockSize);
var magic = d.GetBit(16);
if (magic != 0xffff)
{
throw new HcaException(ErrorMessages.GetMagicNotMatch(0xffff, magic), ActionResult.MagicNotMatch);
}
var a = (d.GetBit(9) << 8) - d.GetBit(7);
var channels = _channels;
var ath = _ath;
try {
for (var i = 0; i < hcaInfo.ChannelCount; ++i)
{
channels[i].Decode1(d, hcaInfo.CompR09, a, ath.Table);
}
for (var i = 0; i < 8; ++i)
{
for (var j = 0; j < hcaInfo.ChannelCount; ++j)
{
channels[j].Decode2(d);
}
for (var j = 0; j < hcaInfo.ChannelCount; ++j)
{
channels[j].Decode3(hcaInfo.CompR09, hcaInfo.CompR08, (uint)(hcaInfo.CompR07 + hcaInfo.CompR06), hcaInfo.CompR05);
}
for (var j = 0; j < hcaInfo.ChannelCount - 1; ++j)
{
Channel.Decode4(ref channels[j], ref channels[j + 1], i, (uint)(hcaInfo.CompR05 - hcaInfo.CompR06), hcaInfo.CompR06, hcaInfo.CompR07);
}
for (var j = 0; j < hcaInfo.ChannelCount; ++j)
{
channels[j].Decode5(i);
}
}
return(blockData.Length);
} catch (IndexOutOfRangeException ex) {
const string message = "Index access exception detected. It is probably because you are using an incorrect HCA key pair while decoding a type 56 HCA file.";
throw new HcaException(message, ActionResult.DecodeFailed, ex);
}
}
private static void FixDataBlock(byte[] blockData)
{
var length = blockData.Length;
var sum = HcaHelper.Checksum(blockData, 0, length - 2);
if (BitConverter.IsLittleEndian)
{
sum = DereToreHelper.SwapEndian(sum);
}
var sumBytes = BitConverter.GetBytes(sum);
blockData[length - 2] = sumBytes[0];
blockData[length - 1] = sumBytes[1];
}
private bool ConvertBlock(byte[] blockData, Stream outputStream)
{
var checksum = HcaHelper.Checksum(blockData, 0);
if (checksum != 0)
{
return(false);
}
_cipherFrom.Decrypt(blockData);
var dataClass = new DataBits(blockData, (uint)blockData.Length);
var magic = dataClass.GetBit(16);
if (magic != 0xffff)
{
return(false);
}
_cipherTo.Encrypt(blockData);
FixDataBlock(blockData);
outputStream.Write(blockData, 0, blockData.Length);
return(true);
}
private int DecodeToWaveR32(byte[] blockData, int blockIndex)
{
var hcaInfo = HcaInfo;
if (blockData == null)
{
throw new ArgumentNullException(nameof(blockData));
}
if (blockData.Length < hcaInfo.BlockSize)
{
throw new HcaException(ErrorMessages.GetInvalidParameter(nameof(blockData) + "." + nameof(blockData.Length)), ActionResult.InvalidParameter);
}
var checksum = HcaHelper.Checksum(blockData, 0);
if (checksum != 0)
{
throw new HcaException(ErrorMessages.GetChecksumNotMatch(0, checksum), ActionResult.ChecksumNotMatch);
}
_cipher.Decrypt(blockData);
var d = new DataBits(blockData, hcaInfo.BlockSize);
var magic = d.GetBit(16);
if (magic != 0xffff)
{
throw new HcaException(ErrorMessages.GetMagicNotMatch(0xffff, magic), ActionResult.MagicNotMatch);
}
var a = (d.GetBit(9) << 8) - d.GetBit(7);
var channels = _channels;
var ath = _ath;
string site = null;
try {
int i;
for (i = 0; i < hcaInfo.ChannelCount; ++i)
{
site = $"Decode1({i.ToString()})";
channels.Decode1(i, d, hcaInfo.CompR09, a, ath.Table);
}
for (i = 0; i < 8; ++i)
{
for (var j = 0; j < hcaInfo.ChannelCount; ++j)
{
site = $"Decode2({i.ToString()}/{j.ToString()})";
channels.Decode2(j, d);
}
for (var j = 0; j < hcaInfo.ChannelCount; ++j)
{
site = $"Decode3({i.ToString()}/{j.ToString()})";
channels.Decode3(j, hcaInfo.CompR09, hcaInfo.CompR08, (uint)(hcaInfo.CompR07 + hcaInfo.CompR06), hcaInfo.CompR05);
}
for (var j = 0; j < hcaInfo.ChannelCount - 1; ++j)
{
site = $"Decode4({i.ToString()}/{j.ToString()})";
channels.Decode4(j, j + 1, i, (uint)(hcaInfo.CompR05 - hcaInfo.CompR06), hcaInfo.CompR06, hcaInfo.CompR07);
}
for (var j = 0; j < hcaInfo.ChannelCount; ++j)
{
site = $"Decode5({i.ToString()}/{j.ToString()})";
channels.Decode5(j, i);
}
}
return(blockData.Length);
} catch (IndexOutOfRangeException ex) {
const string message = "Index access exception detected. It is probably because you are using an incorrect HCA key pair while decoding a type 56 HCA file.";
var siteInfo = $"Site: {site} @ block {blockIndex.ToString()}";
var err = message + Environment.NewLine + siteInfo;
throw new HcaException(err, ActionResult.DecodeFailed, ex);
}
}