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 void TransformWaveDataBlocks(Stream source, byte[] destination, uint startBlockIndex, uint blockCount, IWaveWriter waveWriter)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (destination == null)
{
throw new ArgumentNullException(nameof(destination));
}
if (waveWriter == null)
{
throw new ArgumentNullException(nameof(waveWriter));
}
var hcaInfo = HcaInfo;
var startOffset = hcaInfo.DataOffset + startBlockIndex * hcaInfo.BlockSize;
source.Seek(startOffset, SeekOrigin.Begin);
var channels = _channels;
var decodeParams = _decodeParams;
var hcaBlockBuffer = GetHcaBlockBuffer();
var channelCount = hcaInfo.ChannelCount;
var rvaVolume = hcaInfo.RvaVolume;
var bytesPerSample = waveWriter.BytesPerSample;
var volume = decodeParams.Volume;
for (var l = 0; l < (int)blockCount; ++l)
{
source.Read(hcaBlockBuffer, 0, hcaBlockBuffer.Length);
DecodeToWaveR32(hcaBlockBuffer, l + (int)startBlockIndex);
for (var i = 0; i < 8; ++i)
{
for (var j = 0; j < 0x80; ++j)
{
for (var k = 0; k < channelCount; ++k)
{
float f;
unsafe {
var pWave = channels.GetPtrOfWave(k);
f = pWave[i * 0x80 + j];
f = f * volume * rvaVolume;
}
HcaHelper.Clamp(ref f, -1f, 1f);
var offset = (((l * 8 + i) * 0x80 + j) * channelCount + k) * bytesPerSample;
waveWriter.DecodeToBuffer(f, destination, (uint)offset);
}
}
}
}
}
public HcaDecoder(Stream sourceStream, DecodeParams decodeParams)
: base(sourceStream)
{
_decodeParams = decodeParams;
HcaHelper.TranslateTables();
_ath = new Ath();
_cipher = new Cipher();
Initialize();
}
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 void TransformWaveDataBlocks(Stream source, byte[] destination, uint startBlockIndex, uint blockCount, IWaveWriter waveWriter)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (destination == null)
{
throw new ArgumentNullException(nameof(destination));
}
if (waveWriter == null)
{
throw new ArgumentNullException(nameof(waveWriter));
}
var hcaInfo = HcaInfo;
var startOffset = hcaInfo.DataOffset + startBlockIndex * hcaInfo.BlockSize;
source.Seek(startOffset, SeekOrigin.Begin);
var channels = _channels;
var decodeParams = _decodeParams;
var hcaBlockBuffer = GetHcaBlockBuffer();
var channelCount = (int)hcaInfo.ChannelCount;
var rvaVolume = hcaInfo.RvaVolume;
var bytesPerSample = waveWriter.BytesPerSample;
foreach (var l in Enumerable.Range(0, (int)blockCount))
{
source.Read(hcaBlockBuffer, 0, hcaBlockBuffer.Length);
DecodeToWaveR32(hcaBlockBuffer);
Parallel.For(0, 8, i => {
for (var j = 0; j < 0x80; ++j)
{
for (var k = 0; k < channelCount; ++k)
{
var f = channels[k].Wave[i * 0x80 + j] * decodeParams.Volume * rvaVolume;
HcaHelper.Clamp(ref f, -1f, 1f);
var offset = (((l * 8 + i) * 0x80 + j) * channelCount + k) * bytesPerSample;
waveWriter.DecodeToBuffer(f, destination, (uint)offset);
}
}
});
}
}
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);
}
public void Decode5(int index)
{
float[] s;
float[] d;
s = Block;
d = Wav1;
int sIndex = 0, dIndex = 0;
int s1Index, s2Index;
for (int i = 0, count1 = 1, count2 = 0x40; i < 7; ++i, count1 <<= 1, count2 >>= 1)
{
int dIndex1 = dIndex, dIndex2 = dIndex + count2;
for (int j = 0; j < count1; ++j)
{
for (int k = 0; k < count2; ++k)
{
float a = s[sIndex++];
float b = s[sIndex++];
d[dIndex1++] = b + a;
d[dIndex2++] = a - b;
}
dIndex1 += count2;
dIndex2 += count2;
}
sIndex -= 0x80;
HcaHelper.Exchange(ref sIndex, ref dIndex);
HcaHelper.Exchange(ref s, ref d);
}
s = Wav1;
d = Block;
sIndex = dIndex = 0;
for (int i = 0, count1 = 0x40, count2 = 1; i < 7; ++i, count1 >>= 1, count2 <<= 1)
{
// The original array is a 2-rank array, [7][0x40].
int list1FloatIndex = i * 0x40;
// The original array is a 2-rank array, [7][0x40].
int list2FloatIndex = i * 0x40;
s1Index = sIndex;
s2Index = sIndex + count2;
int dIndex1 = dIndex;
int dIndex2 = dIndex + count2 * 2 - 1;
for (int j = 0; j < count1; ++j)
{
for (int k = 0; k < count2; ++k)
{
float fa = s[s1Index++];
float fb = s[s2Index++];
float fc = ChannelTables.Decode5List1Single[list1FloatIndex++];
float fd = ChannelTables.Decode5List2Single[list2FloatIndex++];
d[dIndex1++] = fa * fc - fb * fd;
d[dIndex2--] = fa * fd + fb * fc;
}
s1Index += count2;
s2Index += count2;
dIndex1 += count2;
dIndex2 += count2 * 3;
}
HcaHelper.Exchange(ref sIndex, ref dIndex);
HcaHelper.Exchange(ref s, ref d);
}
d = Wav2;
for (int i = 0; i < 0x80; ++i)
{
d[i] = s[i];
}
s = ChannelTables.Decode5List3Single;
sIndex = 0;
d = Wave;
// The original array is [8][0x80].
dIndex = index * 0x80;
float[] s1 = Wav2;
s1Index = 0x40;
float[] s2 = Wav3;
s2Index = 0;
for (int i = 0; i < 0x40; ++i)
{
d[dIndex++] = s1[s1Index++] * s[sIndex++] + s2[s2Index++];
}
for (int i = 0; i < 0x40; ++i)
{
d[dIndex++] = s[sIndex++] * s1[--s1Index] - s2[s2Index++];
}
s1 = Wav2;
s2 = Wav3;
s1Index = 0x40 - 1;
s2Index = 0;
for (int i = 0; i < 0x40; ++i)
{
s2[s2Index++] = s1[s1Index--] * s[--sIndex];
}
for (int i = 0; i < 0x40; ++i)
{
s2[s2Index++] = s[--sIndex] * s1[++s1Index];
}
}
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 = $"Site: {site} @ block {blockIndex.ToString()}";
var err = message + Environment.NewLine + siteInfo;
throw new HcaException(err, ActionResult.DecodeFailed, ex);
}
}
internal void ParseHeaders()
{
var stream = SourceStream;
uint v;
var hcaInfo = new HcaInfo();
// HCA
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.HCA))
{
HcaHeader header;
stream.Read(out header);
hcaInfo.Version = DereToreHelper.SwapEndian(header.Version);
hcaInfo.DataOffset = DereToreHelper.SwapEndian(header.DataOffset);
}
else
{
throw new HcaException("Missing HCA signature.", ActionResult.MagicNotMatch);
}
// FMT
v = stream.PeekUInt32LE();
if (MagicValues.IsMagicMatch(v, MagicValues.FMT))
{
FormatHeader header;
stream.Read(out header);
hcaInfo.ChannelCount = header.Channels;
hcaInfo.SamplingRate = DereToreHelper.SwapEndian(header.SamplingRate << 8);
hcaInfo.BlockCount = DereToreHelper.SwapEndian(header.Blocks);
hcaInfo.FmtR01 = DereToreHelper.SwapEndian(header.R01);
hcaInfo.FmtR02 = DereToreHelper.SwapEndian(header.R02);
if (hcaInfo.ChannelCount < 1 || hcaInfo.ChannelCount > 16)
{
throw new HcaException($"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;
}