internal void Rebuild(uint index, OggStream ogg)
{
byte[] codebook = GetCodebook(index);
uint codebookSize = GetCodebookSize(index);
if (codebookSize == 0xFFFFFFFF || codebook == null)
{
throw new Exception("コードブックのインデックスが破損しています。");
}
Rebuild(new BitStream(new MemoryStream(codebook)), codebookSize, ogg);
}
internal void Rebuild(uint index, OggStream ogg)
{
byte[] codebook = GetCodebook(index);
uint codebookSize = GetCodebookSize(index);
if (codebookSize == 0xFFFFFFFF || codebook == null)
{
throw new Exception("Invalid Codebook Index");
}
Rebuild(new BitStream(new MemoryStream(codebook)), codebookSize, ogg);
}
internal void Copy(BitStream bitStream, OggStream ogg)
{
byte[] id = new byte[]
{
(byte)bitStream.Read(8),
(byte)bitStream.Read(8),
(byte)bitStream.Read(8)
};
ushort dimensions = (ushort)bitStream.Read(16);
uint entries = bitStream.Read(24);
if (id[0] != 0x42 || id[1] != 0x43 || id[2] != 0x56)
{
throw new Exception("コードブックのパターンが見つかりませんでした。");
}
ogg.BitWrite(id[0]);
ogg.BitWrite(id[1]);
ogg.BitWrite(id[2]);
ogg.BitWrite(dimensions);
ogg.BitWrite(entries, 24);
byte orderedFlag = (byte)bitStream.Read(1);
ogg.WriteBit(orderedFlag);
if (orderedFlag == 1)
{
byte initialLength = (byte)bitStream.Read(5);
ogg.BitWrite(initialLength, 5);
uint currentEntry = 0;
while (currentEntry < entries)
{
uint bitCount = ILog(entries - currentEntry);
uint number = bitStream.Read((int)bitCount);
ogg.BitWrite(number, (byte)bitCount);
currentEntry += number;
}
if (currentEntry > entries)
{
throw new Exception("コードブックをコピーできませんでした。");
}
}
else
{
byte sparseFlag = (byte)bitStream.Read(1);
ogg.WriteBit(sparseFlag);
for (int i = 0; i < entries; i++)
{
bool presentBool = true;
if (sparseFlag == 1)
{
byte sparsePresenceFlag = (byte)bitStream.Read(1);
ogg.WriteBit(sparsePresenceFlag);
presentBool = sparsePresenceFlag == 1;
}
else
{
byte codewordLength = (byte)bitStream.Read(5);
ogg.BitWrite(codewordLength, 5);
}
}
}
byte lookupType = (byte)bitStream.Read(4);
ogg.BitWrite(lookupType, 4);
if (lookupType == 1)
{
ogg.BitWrite(bitStream.Read(32));
ogg.BitWrite(bitStream.Read(32));
byte valueLength = (byte)bitStream.Read(4);
ogg.BitWrite(valueLength, 4);
ogg.WriteBit((byte)bitStream.Read(1));
uint quantValues = QuantValues(entries, dimensions);
for (int i = 0; i < quantValues; i++)
{
uint value = bitStream.Read(valueLength + 1);
ogg.BitWrite(value, (byte)(valueLength + 1));
}
}
else
{
throw new Exception("コードブックをコピーできませんでした。");
}
}
internal void Rebuild(BitStream bitStream, uint codebookSize, OggStream ogg)
{
byte dimensions = (byte)bitStream.Read(4);
ushort entries = (ushort)bitStream.Read(14);
ogg.BitWrite(0x564342, 24);
ogg.BitWrite((ushort)dimensions, 16);
ogg.BitWrite((uint)entries, 24);
byte orderedFlag = (byte)bitStream.Read(1);
ogg.WriteBit(orderedFlag);
if (orderedFlag == 1)
{
byte initialLength = (byte)bitStream.Read(5);
ogg.BitWrite(initialLength, 5);
uint currentEntry = 0;
while (currentEntry < entries)
{
uint bitCount = ILog(entries - currentEntry);
uint number = bitStream.Read((int)bitCount);
ogg.BitWrite(number, (byte)bitCount);
currentEntry += number;
}
if (currentEntry > entries)
{
throw new Exception("コードブックをリビルドできませんでした。");
}
}
else
{
byte codewordLengthLength = (byte)bitStream.Read(3);
byte sparseFlag = (byte)bitStream.Read(1);
ogg.WriteBit(sparseFlag);
if (codewordLengthLength == 0 || codewordLengthLength > 5)
{
throw new Exception("コードブックをリビルドできませんでした。");
}
for (int i = 0; i < entries; i++)
{
bool presentBool = true;
if (sparseFlag == 1)
{
byte sparsePresenceFlag = (byte)bitStream.Read(1);
ogg.WriteBit(sparsePresenceFlag);
presentBool = sparsePresenceFlag == 1;
}
if (presentBool)
{
byte codewordLength = (byte)bitStream.Read(codewordLengthLength);
ogg.BitWrite(codewordLength, 5);
}
}
}
byte lookupType = (byte)bitStream.Read(1);
ogg.BitWrite(lookupType, 4);
if (lookupType == 1)
{
ogg.BitWrite(bitStream.Read(32));
ogg.BitWrite(bitStream.Read(32));
byte valueLength = (byte)bitStream.Read(4);
ogg.BitWrite(valueLength, 4);
ogg.WriteBit((byte)bitStream.Read(1));
uint quantValues = QuantValues(entries, dimensions);
for (int i = 0; i < quantValues; i++)
{
uint value = bitStream.Read(valueLength + 1);
ogg.BitWrite(value, (byte)(valueLength + 1));
}
}
else if (lookupType != 0)
{
throw new Exception("コードブックをコピーできませんでした。");
}
if (codebookSize != 0 && bitStream.TotalBitsRead / 8 + 1 != codebookSize)
{
throw new Exception("コードブックをリビルドできませんでした。");
}
}
private void GenerateOGGHeader(OggStream ogg, string codebooksLocation, bool inlineCodebooks, bool fullSetup, ref bool[] modeBlockFlag, ref uint modeBits)
{
ogg.WriteVorbisHeader(1);
ogg.BitWrite((uint)0);
ogg.BitWrite((byte)this.Channels);
ogg.BitWrite(this.SampleRate);
ogg.BitWrite((uint)0);
ogg.BitWrite(this.AverageBytesPerSecond * 8);
ogg.BitWrite((uint)0);
ogg.BitWrite(this._blocksize0Pow, 4);
ogg.BitWrite(this._blocksize1Pow, 4);
ogg.WriteBit(1);
ogg.FlushPage();
ogg.WriteVorbisHeader(3);
byte[] vendor = Encoding.UTF8.GetBytes("Converted from Audiokinetic Wwise by SRTTbacon");
ogg.BitWrite((uint)vendor.Length);
for (int i = 0; i < vendor.Length; i++)
{
ogg.BitWrite(vendor[i]);
}
if (this._loopCount == 0)
{
ogg.BitWrite((uint)0);
}
else
{
ogg.BitWrite((uint)2);
byte[] loopStart = Encoding.UTF8.GetBytes("LoopStart=" + this._loopStart.ToString());
ogg.BitWrite((uint)loopStart.Length);
for (int i = 0; i < loopStart.Length; i++)
{
ogg.BitWrite(loopStart[i]);
}
byte[] loopEnd = Encoding.UTF8.GetBytes("LoopEnd=" + this._loopEnd.ToString());
ogg.BitWrite((uint)loopEnd.Length);
for (int i = 0; i < loopEnd.Length; i++)
{
ogg.BitWrite(loopEnd[i]);
}
}
ogg.WriteBit(1);
ogg.FlushPage();
ogg.WriteVorbisHeader(5);
Packet setupPacket = new Packet(this._wemFile, this._dataChunkOffset + this._setupPacketOffset, this._noGranule);
this._wemFile.Seek(setupPacket.GetOffset(), SeekOrigin.Begin);
if (setupPacket.GetGranule() != 0)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
BitStream bitStream = new BitStream(this._wemFile);
uint codebookCount = bitStream.Read(8);
ogg.BitWrite((byte)codebookCount);
codebookCount++;
if (inlineCodebooks)
{
CodebookLibrary codebook = new CodebookLibrary();
for (int i = 0; i < codebookCount; i++)
{
if (fullSetup)
{
codebook.Copy(bitStream, ogg);
}
else
{
codebook.Rebuild(bitStream, 0, ogg);
}
}
}
else
{
CodebookLibrary codebook = new CodebookLibrary(codebooksLocation);
for (int i = 0; i < codebookCount; i++)
{
ushort codebookID = (ushort)bitStream.Read(10);
codebook.Rebuild(codebookID, ogg);
}
}
byte timeCountLess1 = 0;
ushort dummyTimeValue = 0;
ogg.BitWrite(timeCountLess1, 6);
ogg.BitWrite(dummyTimeValue);
if (fullSetup)
{
while (bitStream.TotalBitsRead < setupPacket.GetSize() * 8U)
{
ogg.WriteBit((byte)bitStream.Read(1));
}
}
else
{
byte floorCount = (byte)bitStream.Read(6);
ogg.BitWrite(floorCount, 6);
floorCount++;
for (int i = 0; i < floorCount; i++)
{
ushort floorType = 1;
ogg.BitWrite(floorType);
byte floor1Partitions = (byte)bitStream.Read(5);
ogg.BitWrite(floor1Partitions, 5);
uint[] floor1PartitionClassList = new uint[floor1Partitions];
uint maximumClass = 0;
for (int j = 0; j < floor1Partitions; j++)
{
byte floor1PartitionClass = (byte)bitStream.Read(4);
ogg.BitWrite(floor1PartitionClass, 4);
floor1PartitionClassList[j] = floor1PartitionClass;
if (floor1PartitionClass > maximumClass)
{
maximumClass = floor1PartitionClass;
}
}
uint[] floor1ClassDimensionList = new uint[maximumClass + 1];
for (int j = 0; j <= maximumClass; j++)
{
byte classDimension = (byte)bitStream.Read(3);
ogg.BitWrite(classDimension, 3);
floor1ClassDimensionList[j] = classDimension + 1U;
byte classSubclasses = (byte)bitStream.Read(2);
ogg.BitWrite(classSubclasses, 2);
if (classSubclasses != 0)
{
byte masterbook = (byte)bitStream.Read(8);
ogg.BitWrite(masterbook);
if (maximumClass >= codebookCount)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
for (int k = 0; k < (1 << classSubclasses); k++)
{
byte subclassBook = (byte)bitStream.Read(8);
ogg.BitWrite(subclassBook);
if ((subclassBook - 1) >= 0 && (subclassBook - 1) >= codebookCount)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
}
byte floor1Multiplier = (byte)bitStream.Read(2);
ogg.BitWrite(floor1Multiplier, 2);
byte rangeBits = (byte)bitStream.Read(4);
ogg.BitWrite(rangeBits, 4);
for (int j = 0; j < floor1Partitions; j++)
{
uint currentClassNumber = floor1PartitionClassList[j];
for (int k = 0; k < floor1ClassDimensionList[currentClassNumber]; k++)
{
ogg.BitWrite(bitStream.Read(rangeBits), rangeBits);
}
}
}
byte residueCount = (byte)bitStream.Read(6);
ogg.BitWrite(residueCount, 6);
residueCount++;
for (int i = 0; i < residueCount; i++)
{
byte residueType = (byte)bitStream.Read(2);
ogg.BitWrite((ushort)residueType);
if (residueType > 2)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
uint residueBegin = bitStream.Read(24);
uint residueEnd = bitStream.Read(24);
uint residuePartitionSize = bitStream.Read(24);
byte residueClassifications = (byte)bitStream.Read(6);
byte residueClassbook = (byte)bitStream.Read(8);
ogg.BitWrite(residueBegin, 24);
ogg.BitWrite(residueEnd, 24);
ogg.BitWrite(residuePartitionSize, 24);
ogg.BitWrite(residueClassifications, 6);
ogg.BitWrite(residueClassbook, 8);
residueClassifications++;
if (residueClassbook >= codebookCount)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
uint[] residueCascade = new uint[residueClassifications];
for (int j = 0; j < residueClassifications; j++)
{
byte highBits = 0;
byte lowBits = (byte)bitStream.Read(3);
ogg.BitWrite(lowBits, 3);
byte bitFlag = (byte)bitStream.Read(1);
ogg.WriteBit(bitFlag);
if (bitFlag == 1)
{
highBits = (byte)bitStream.Read(5);
ogg.BitWrite(highBits, 5);
}
residueCascade[j] = highBits * 8U + lowBits;
}
for (int j = 0; j < residueClassifications; j++)
{
for (int k = 0; k < 8; k++)
{
if ((residueCascade[j] & (1 << k)) != 0)
{
byte residueBook = (byte)bitStream.Read(8);
ogg.BitWrite(residueBook);
if (residueBook >= codebookCount)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
}
}
}
byte mappingCount = (byte)bitStream.Read(6);
ogg.BitWrite(mappingCount, 6);
mappingCount++;
for (int i = 0; i < mappingCount; i++)
{
ushort mappingType = 0;
ogg.BitWrite(mappingType);
byte submapsFlag = (byte)bitStream.Read(1);
ogg.WriteBit(submapsFlag);
uint submaps = 1;
if (submapsFlag == 1)
{
byte submapsLess = (byte)bitStream.Read(4);
submaps = submapsLess + 1U;
ogg.BitWrite(submapsLess, 4);
}
byte squarePolarFlag = (byte)bitStream.Read(1);
ogg.WriteBit(squarePolarFlag);
if (squarePolarFlag == 1)
{
byte couplingSteps = (byte)bitStream.Read(8);
ogg.BitWrite(couplingSteps);
couplingSteps++;
for (int j = 0; j < couplingSteps; j++)
{
uint magnitude = bitStream.Read((int)ILog(this.Channels - 1U));
uint angle = bitStream.Read((int)ILog(this.Channels - 1U));
ogg.BitWrite(magnitude, (byte)ILog(this.Channels - 1U));
ogg.BitWrite(angle, (byte)ILog(this.Channels - 1U));
if (angle == magnitude || magnitude >= this.Channels || angle >= this.Channels)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
}
byte mappingReserved = (byte)bitStream.Read(2);
ogg.BitWrite(mappingReserved, 2);
if (mappingReserved != 0)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
if (submaps > 1)
{
for (int j = 0; j < this.Channels; j++)
{
byte mappingMux = (byte)bitStream.Read(4);
ogg.BitWrite(mappingMux, 4);
if (mappingMux >= submaps)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
}
for (int j = 0; j < submaps; j++)
{
byte timeConfig = (byte)bitStream.Read(8);
ogg.BitWrite(timeConfig);
byte floorNumber = (byte)bitStream.Read(8);
ogg.BitWrite(floorNumber);
if (floorNumber >= floorCount)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
byte residueNumber = (byte)bitStream.Read(8);
ogg.BitWrite(residueNumber);
if (residueNumber >= residueCount)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
}
byte modeCount = (byte)bitStream.Read(6);
ogg.BitWrite(modeCount, 6);
modeCount++;
modeBlockFlag = new bool[modeCount];
modeBits = ILog(modeCount - 1U);
for (int i = 0; i < modeCount; i++)
{
byte blockFlag = (byte)bitStream.Read(1);
ogg.WriteBit(blockFlag);
modeBlockFlag[i] = blockFlag == 1;
ushort windowType = 0;
ushort transformType = 0;
ogg.BitWrite(windowType);
ogg.BitWrite(transformType);
byte mapping = (byte)bitStream.Read(8);
ogg.BitWrite(mapping, 8);
if (mapping >= mappingCount)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
ogg.WriteBit(1);
}
ogg.FlushPage();
if ((bitStream.TotalBitsRead + 7) / 8 != setupPacket.GetSize())
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
if (setupPacket.NextOffset() != this._dataChunkOffset + this._firstAudioPacketOffset)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
}
private void GenerateOGGHeaderTriad(OggStream ogg)
{
uint offset = this._dataChunkOffset + this._setupPacketOffset;
Packet8 informationPacket = new Packet8(this._wemFile, offset);
uint informationPacketSize = informationPacket.GetSize();
if (informationPacket.GetGranule() != 0)
{
throw new Exception("ヘッダーの生成中にエラーが発生しました。");
}
this._wemFile.Seek(informationPacket.GetOffset(), SeekOrigin.Begin);
byte[] informationPacketType = new byte[1];
this._wemFile.Read(informationPacketType, 0, 1);
if (informationPacketType[0] != 1)
{
throw new Exception("ヘッダーの生成中にエラーが発生しました。");
}
ogg.BitWrite(informationPacketType[0]);
byte[] b = new byte[1];
for (int i = 0; i < informationPacketSize; i++)
{
this._wemFile.Read(b, 0, 1);
ogg.BitWrite(b[0]);
}
ogg.FlushPage();
offset = informationPacket.NextOffset();
Packet8 commentPacket = new Packet8(this._wemFile, offset);
uint commentPacketSize = commentPacket.GetSize();
if (commentPacket.GetGranule() != 0)
{
throw new Exception("ヘッダーの生成中にエラーが発生しました。");
}
this._wemFile.Seek(commentPacket.GetOffset(), SeekOrigin.Begin);
byte[] commentPacketType = new byte[1];
this._wemFile.Read(commentPacketType, 0, 1);
if (commentPacketType[0] != 3)
{
throw new Exception("ヘッダーの生成中にエラーが発生しました。");
}
ogg.BitWrite(commentPacketType[0]);
byte[] c = new byte[1];
for (int i = 0; i < commentPacketSize; i++)
{
this._wemFile.Read(c, 0, 1);
ogg.BitWrite(c[0]);
}
ogg.FlushPage();
offset = commentPacket.NextOffset();
Packet8 setupPacket = new Packet8(this._wemFile, offset);
this._wemFile.Seek(setupPacket.GetOffset(), SeekOrigin.Begin);
if (setupPacket.GetGranule() != 0)
{
throw new Exception("ヘッダーの生成中にエラーが発生しました。");
}
BitStream bitStream = new BitStream(this._wemFile);
byte setupPacketType = (byte)bitStream.Read(8);
if (setupPacketType != 5)
{
throw new Exception("ヘッダーの生成中にエラーが発生しました。");
}
ogg.BitWrite(setupPacketType);
for (int i = 0; i < 6; i++)
{
ogg.BitWrite((byte)bitStream.Read(8));
}
byte codebookCount = (byte)bitStream.Read(8);
ogg.BitWrite(codebookCount);
codebookCount++;
CodebookLibrary codebook = new CodebookLibrary();
for (int i = 0; i < codebookCount; i++)
{
codebook.Copy(bitStream, ogg);
}
while (bitStream.TotalBitsRead < setupPacket.GetSize() * 8)
{
ogg.WriteBit((byte)bitStream.Read(1));
}
ogg.FlushPage();
offset = setupPacket.NextOffset();
if (offset != this._dataChunkOffset + this._firstAudioPacketOffset)
{
throw new Exception("ヘッダーの生成中にエラーが発生しました。");
}
}
public void GenerateOGG(string fileLocation, string codebooksLocation, bool inlineCodebooks, bool fullSetup)
{
if (inlineCodebooks && string.IsNullOrEmpty(codebooksLocation))
{
throw new ArgumentException("コードブックが複数設定されています。");
}
else if (!inlineCodebooks && string.IsNullOrEmpty(codebooksLocation))
{
throw new ArgumentException("コードブックが設定されていません。");
}
using (OggStream ogg = new OggStream(File.Create(fileLocation)))
{
bool[] modeBlockFlag = null;
uint modeBits = 0;
bool previousBlockFlag = false;
if (this._headerTriadPresent)
{
GenerateOGGHeaderTriad(ogg);
}
else
{
GenerateOGGHeader(ogg, codebooksLocation, inlineCodebooks, fullSetup, ref modeBlockFlag, ref modeBits);
}
uint offset = this._dataChunkOffset + this._firstAudioPacketOffset;
while (offset < this._dataChunkOffset + this._dataChunkSize)
{
uint size;
uint granule;
uint packetHeaderSize;
uint packetPayloadOffset;
uint nextOffset;
if (this._oldPacketHeaders)
{
Packet8 audioPacket = new Packet8(this._wemFile, offset);
packetHeaderSize = audioPacket.GetHeaderSize();
size = audioPacket.GetSize();
packetPayloadOffset = audioPacket.GetOffset();
granule = audioPacket.GetGranule();
nextOffset = audioPacket.NextOffset();
}
else
{
Packet audioPacket = new Packet(this._wemFile, offset, this._noGranule);
packetHeaderSize = audioPacket.GetHeaderSize();
size = audioPacket.GetSize();
packetPayloadOffset = audioPacket.GetOffset();
granule = audioPacket.GetGranule();
nextOffset = audioPacket.NextOffset();
}
if (offset + packetHeaderSize > this._dataChunkOffset + this._dataChunkSize)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
offset = packetPayloadOffset;
this._wemFile.Seek(offset, SeekOrigin.Begin);
if (granule == 0xFFFFFFFF)
{
ogg.SetGranule(1);
}
else
{
ogg.SetGranule(granule);
}
if (this._modPackets)
{
if (modeBlockFlag == null)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
byte packetType = 0;
ogg.WriteBit(packetType);
uint modeNumber = 0;
uint remainder = 0;
{
BitStream bitStream = new BitStream(this._wemFile);
modeNumber = bitStream.Read((int)modeBits);
ogg.BitWrite(modeNumber, (byte)modeBits);
remainder = bitStream.Read(8 - (int)modeBits);
}
if (modeBlockFlag[modeNumber])
{
this._wemFile.Seek(nextOffset, SeekOrigin.Begin);
bool nextBlockFlag = false;
if (nextOffset + packetHeaderSize <= this._dataChunkOffset + this._dataChunkSize)
{
Packet audioPacket = new Packet(this._wemFile, nextOffset, this._noGranule);
uint nextPacketSize = audioPacket.GetSize();
if (nextPacketSize != 0xFFFFFFFF)
{
this._wemFile.Seek(audioPacket.GetOffset(), SeekOrigin.Begin);
BitStream bitStream = new BitStream(this._wemFile);
uint nextModeNumber = bitStream.Read((int)modeBits);
nextBlockFlag = modeBlockFlag[nextModeNumber];
}
}
byte previousWindowType = previousBlockFlag ? (byte)1 : (byte)0;
ogg.WriteBit(previousWindowType);
byte nextWindowType = previousBlockFlag ? (byte)1 : (byte)0;
ogg.WriteBit(nextWindowType);
this._wemFile.Seek(offset + 1, SeekOrigin.Begin);
}
previousBlockFlag = modeBlockFlag[modeNumber];
ogg.BitWrite(remainder, (byte)(8 - modeBits));
}
else
{
int b = this._wemFile.ReadByte();
if (b < 0)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
ogg.BitWrite((byte)b);
}
for (int i = 1; i < size; i++)
{
int b = this._wemFile.ReadByte();
if (b < 0)
{
throw new Exception("Vorbisパケットの生成中にエラーが発生しました。");
}
ogg.BitWrite((byte)b);
}
offset = nextOffset;
ogg.FlushPage(false, (offset == this._dataChunkOffset + this._dataChunkSize));
}
if (offset > this._dataChunkOffset + this._dataChunkSize)
{
throw new Exception("OGGファイルを生成中にエラーが発生しました。");
}
}
}
internal void Copy(BitStream bitStream, OggStream ogg)
{
//https://xiph.org/vorbis/doc/Vorbis_I_spec.pdf
byte[] id = new byte[]
{
(byte)bitStream.Read(8),
(byte)bitStream.Read(8),
(byte)bitStream.Read(8)
};
ushort dimensions = (ushort)bitStream.Read(16);
uint entries = bitStream.Read(24);
if (id[0] != 0x42 || id[1] != 0x43 || id[2] != 0x56)
{
throw new Exception("Invalid Codebook Sync Pattern");
}
ogg.BitWrite(id[0]);
ogg.BitWrite(id[1]);
ogg.BitWrite(id[2]);
ogg.BitWrite(dimensions);
ogg.BitWrite(entries, 24);
byte orderedFlag = (byte)bitStream.Read(1);
ogg.WriteBit(orderedFlag);
if (orderedFlag == 1)
{
byte initialLength = (byte)bitStream.Read(5);
ogg.BitWrite(initialLength, 5);
uint currentEntry = 0;
while (currentEntry < entries)
{
uint bitCount = ILog(entries - currentEntry);
uint number = bitStream.Read((int)bitCount);
ogg.BitWrite(number, (byte)bitCount);
currentEntry += number;
}
if (currentEntry > entries)
{
throw new Exception("There was an error copying a codebook");
}
}
else
{
byte sparseFlag = (byte)bitStream.Read(1);
ogg.WriteBit(sparseFlag);
for (int i = 0; i < entries; i++)
{
bool presentBool = true;
if (sparseFlag == 1)
{
byte sparsePresenceFlag = (byte)bitStream.Read(1);
ogg.WriteBit(sparsePresenceFlag);
presentBool = sparsePresenceFlag == 1;
}
else
{
byte codewordLength = (byte)bitStream.Read(5);
ogg.BitWrite(codewordLength, 5);
}
}
}
byte lookupType = (byte)bitStream.Read(4);
ogg.BitWrite(lookupType, 4);
if (lookupType == 1)
{
ogg.BitWrite(bitStream.Read(32));
ogg.BitWrite(bitStream.Read(32));
byte valueLength = (byte)bitStream.Read(4);
ogg.BitWrite(valueLength, 4);
ogg.WriteBit((byte)bitStream.Read(1));
uint quantValues = QuantValues(entries, dimensions);
for (int i = 0; i < quantValues; i++)
{
uint value = bitStream.Read(valueLength + 1);
ogg.BitWrite(value, (byte)(valueLength + 1));
}
}
else
{
throw new Exception("There was an error copying a codebook");
}
}