public static Stream Decompress(string fileName)
{
if (!IsCompressed(fileName))
{
return(File.OpenRead(fileName));
}
byte[] bytesToDecompress = File.ReadAllBytes(fileName);
using (ABinaryReader codeReader = new ABinaryReader(bytesToDecompress.ToMemoryStream(false, true), Endianness.Big, Encoding.GetEncoding(932)),
countReader = new ABinaryReader(bytesToDecompress.ToMemoryStream(false, true), Endianness.Big, Encoding.GetEncoding(932)),
dataReader = new ABinaryReader(bytesToDecompress.ToMemoryStream(false, true), Endianness.Big, Encoding.GetEncoding(932)))
{
// Parse the header.
string headerIdentifier = codeReader.ReadRawString(4);
int uncompressedSize = codeReader.ReadS32();
countReader.Position = codeReader.ReadS32();
dataReader.Position = codeReader.ReadS32();
// This is the buffer where we will put our decompressed data.
// I would use an ABinaryWriter for this, but we need to read/write from the same buffer for the RLE parts.
byte[] outputArray = new byte[uncompressedSize];
int outPosition = 0; // Our position in the destination buffer.
uint validBitsCount = 0; // The number of valid bits left in the code byte.
byte currentCodeByte = 0; // Our current code byte.
// Begin decompression.
while (outPosition < uncompressedSize)
{
// If the current code byte is used, get a new one.
if (validBitsCount <= 0)
{
currentCodeByte = codeReader.Read8();
validBitsCount = 8;
}
// If the next bit in the code byte is a 1, do a direct, 1:1 copy of the next data byte; otherwise, uncompress a chunk of data.
if ((currentCodeByte & 0x80) == 0x80)
{
outputArray[outPosition++] = dataReader.Read8();
}
else
{
// Read the count data.
ushort count = countReader.Read16();
// The last three nybbles represent the distance in the buffer to go back.
int distance = (count & 0xFFF);
// Calculate the position from which we start.
int startOffset = (outPosition - (distance + 1));
// The upper nybble of count; if zero, read a third byte and add 0x10.
int byteCount = ((count >> 12) & 0xF);
// If the upper nybble of the count is equal to zero, that means the number of bytes is too large for a nybble and is actually in the next whole byte.
// Add 0x10 to this byte's value, possibly to account for the original nybble. (How does Thakis figure this crap out?)
if (byteCount == 0)
{
byteCount = (dataReader.Read8() + 0x10);
}
// Take into consideration the two bytes for the count by adding two to the byte count.
byteCount += 2;
// Copy the run data.
Repeater.Repeat(byteCount, () => outputArray[outPosition++] = outputArray[startOffset++]);
}
// Get the next bit in the code byte.
currentCodeByte <<= 1;
validBitsCount--;
}
// Return the uncompressed data.
return(outputArray.ToMemoryStream(false, true));
}
}
// Token: 0x06000008 RID: 8 RVA: 0x00002124 File Offset: 0x00000324
private static MIDIEvent FromStream(ABinaryReader binaryReader, ulong deltaTime, byte statusByte)
{
if (statusByte == 255)
{
MetaEventType metaEventType = (MetaEventType)binaryReader.Read8();
int num = (int)binaryReader.ReadUIntVar();
if (!metaEventType.IsDefined <MetaEventType>())
{
throw new InvalidDataException(string.Format("Encountered unsupported meta event type {0}.", metaEventType));
}
MetaEventType metaEventType2 = metaEventType;
if (metaEventType2 <= MetaEventType.EndOfTrack)
{
switch (metaEventType2)
{
case MetaEventType.SequenceNumber:
if (num != 2)
{
throw new InvalidDataException("Invalid size in sequence-number event.");
}
return(new SequenceNumberEvent(deltaTime, (int)binaryReader.Read16()));
case MetaEventType.Text:
return(new TextEvent(deltaTime, binaryReader.ReadRawString(num)));
case MetaEventType.CopyrightNotice:
return(new CopyrightNoticeEvent(deltaTime, binaryReader.ReadRawString(num)));
case MetaEventType.Name:
return(new TrackNameEvent(deltaTime, binaryReader.ReadRawString(num)));
case MetaEventType.InstrumentName:
return(new InstrumentNameEvent(deltaTime, binaryReader.ReadRawString(num)));
case MetaEventType.Lyrics:
return(new LyricsEvent(deltaTime, binaryReader.ReadRawString(num)));
case MetaEventType.Marker:
return(new MarkerEvent(deltaTime, binaryReader.ReadRawString(num)));
case MetaEventType.CuePoint:
return(new CuePointEvent(deltaTime, binaryReader.ReadRawString(num)));
default:
if (metaEventType2 != MetaEventType.ChannelPrefix)
{
if (metaEventType2 == MetaEventType.EndOfTrack)
{
if (num != 0)
{
throw new InvalidDataException("Invalid size in end-of-track event.");
}
return(new EndOfTrackEvent(deltaTime));
}
}
else
{
if (num != 1)
{
throw new InvalidDataException("Invalid size in channel-prefix event.");
}
return(new ChannelPrefixEvent(deltaTime, binaryReader.Read8()));
}
break;
}
}
else if (metaEventType2 != MetaEventType.TempoChange)
{
switch (metaEventType2)
{
case MetaEventType.TimeSignature:
if (num != 4)
{
throw new InvalidDataException("Invalid size in time-signature event.");
}
return(new TimeSignatureEvent(deltaTime, (int)binaryReader.Read8(), (int)binaryReader.Read8(), (int)binaryReader.Read8(), (int)binaryReader.Read8()));
case MetaEventType.KeySignature:
if (num != 2)
{
throw new InvalidDataException("Invalid size in key-signature event.");
}
return(new KeySignatureEvent(deltaTime, (int)binaryReader.ReadS8(), (Scale)binaryReader.Read8()));
default:
if (metaEventType2 == MetaEventType.SequencerSpecific)
{
byte[] array = binaryReader.Read8s(num);
if (num == 0 || num < ((array[0] == 0) ? 3 : 1))
{
throw new InvalidDataException("Invalid size in sequencer-specific event.");
}
bool flag = array[0] == 0;
int manufacturerID = flag ? ((int)array[1] << 8 | (int)array[2]) : ((int)array[0]);
return(new SequencerSpecificEvent(deltaTime, manufacturerID, flag, array.Duplicate(flag ? 3 : 1, array.Length - (flag ? 3 : 1))));
}
break;
}
}
else
{
if (num != 3)
{
throw new InvalidDataException("Invalid size in tempo-change event.");
}
return(new TempoChangeEvent(deltaTime, binaryReader.Read24()));
}
throw new NotImplementedException(string.Format("Encountered unimplemented meta event type {0}.", metaEventType));
}
else if (statusByte == 240 || statusByte == 247)
{
byte[] array2 = binaryReader.Read8s((int)binaryReader.ReadUIntVar());
if (array2.Length == 0 || array2.Length < ((array2[0] == 0) ? 3 : 1))
{
throw new InvalidDataException("Encountered a SysEx event with an invalid size.");
}
SystemExclusiveEventType type = SystemExclusiveEventType.Normal;
bool flag2 = statusByte == 247;
bool flag3 = array2.Last <byte>() == 247;
bool flag4 = array2[0] == 0;
int manufacturerID2 = flag4 ? ((int)array2[1] << 8 | (int)array2[2]) : ((int)array2[0]);
if (flag2)
{
type = (flag3 ? SystemExclusiveEventType.Terminating : SystemExclusiveEventType.Continuation);
}
if (flag3)
{
array2 = array2.Duplicate(array2.Length - 1);
}
return(new SystemExclusiveEvent(deltaTime, type, manufacturerID2, flag4, array2));
}
else
{
ChannelEventType channelEventType = (ChannelEventType)(statusByte & 240);
byte channelNumber = (byte)(statusByte & 15);
if (!channelEventType.IsDefined <ChannelEventType>())
{
throw new InvalidDataException(string.Format("Encountered undefined channel-event type {0}.", channelEventType));
}
ChannelEventType channelEventType2 = channelEventType;
if (channelEventType2 <= ChannelEventType.NoteAftertouch)
{
if (channelEventType2 == ChannelEventType.NoteOff)
{
return(new NoteOffEvent(deltaTime, (int)channelNumber, binaryReader.Read8(), (int)binaryReader.Read8()));
}
if (channelEventType2 == ChannelEventType.NoteOn)
{
return(new NoteOnEvent(deltaTime, (int)channelNumber, (int)binaryReader.Read8(), (int)binaryReader.Read8()));
}
if (channelEventType2 == ChannelEventType.NoteAftertouch)
{
return(new NoteAftertouchEvent(deltaTime, (int)channelNumber, (int)binaryReader.Read8(), (int)binaryReader.Read8()));
}
}
else if (channelEventType2 <= ChannelEventType.ProgramChange)
{
if (channelEventType2 == ChannelEventType.Controller)
{
return(new ControllerEvent(deltaTime, (int)channelNumber, (int)binaryReader.Read8(), (int)binaryReader.Read8()));
}
if (channelEventType2 == ChannelEventType.ProgramChange)
{
return(new ProgramChangeEvent(deltaTime, (int)channelNumber, (int)binaryReader.Read8()));
}
}
else
{
if (channelEventType2 == ChannelEventType.ChannelAftertouch)
{
return(new ChannelAftertouchEvent(deltaTime, (int)channelNumber, (int)binaryReader.Read8()));
}
if (channelEventType2 == ChannelEventType.PitchBend)
{
return(new PitchBendEvent(deltaTime, (int)channelNumber, (int)(binaryReader.Read8() & 127) | (int)(binaryReader.Read8() & 127) << 7));
}
}
throw new NotImplementedException(string.Format("Encountered unimplemented channel event type {0}.", channelEventType));
}
}
// Token: 0x06000155 RID: 341 RVA: 0x00004F50 File Offset: 0x00003150
public static MIDI FromStream(Stream stream)
{
ABinaryReader abinaryReader = new ABinaryReader(stream, Endianness.Big);
MIDI midi = new MIDI();
if (abinaryReader.ReadRawString(4) != "MThd")
{
throw new InvalidDataException("Missing header chunk in MIDI file.");
}
if (abinaryReader.Read32() != 6U)
{
throw new InvalidDataException("Invalid header size in MIDI file.");
}
MIDIFormat enumValue = (MIDIFormat)abinaryReader.Read16();
if (!enumValue.IsDefined <MIDIFormat>())
{
throw new InvalidDataException("Invalid format in MIDI file.");
}
abinaryReader.Read16();
int num = (int)abinaryReader.Read16();
if ((num & 32768) != 0)
{
midi.division = new SMPTEDivision((SMPTEFrameRate)(-(int)(num >> 8)), num & 255); // TODO: Cannot infer type, so: (ModularType) -> (int)
}
else
{
midi.division = new TicksPerBeatDivision(num);
}
int num2 = 0;
while (!abinaryReader.IsAtEndOfStream)
{
if (abinaryReader.ReadRawString(4) != "MTrk")
{
throw new InvalidDataException("Missing track chunk in MIDI file.");
}
ulong num3 = 0UL;
uint num4 = abinaryReader.Read32();
abinaryReader.SetAnchor();
Track track = new Track();
byte b = 0;
while (abinaryReader.Position < (long)((ulong)num4))
{
ulong num5 = abinaryReader.ReadUIntVar();
byte b2 = abinaryReader.Read8();
if (b2 < 128)
{
if (b == 0)
{
throw new InvalidDataException("Encountered running status event with no previous status available.");
}
b2 = b;
abinaryReader.Position -= 1L;
}
if (b2 >= 240 && b2 <= 247)
{
b = 0;
}
else if (b2 >= 128 && b2 <= 239)
{
b = b2;
}
num3 += num5;
if (b2 == 255)
{
MetaEventType metaEventType = (MetaEventType)abinaryReader.Read8();
int num6 = (int)abinaryReader.ReadUIntVar();
if (!metaEventType.IsDefined <MetaEventType>())
{
throw new InvalidDataException(string.Format("Encountered unsupported meta event type {0}.", metaEventType));
}
MetaEventType metaEventType2 = metaEventType;
if (metaEventType2 <= MetaEventType.EndOfTrack)
{
switch (metaEventType2)
{
case MetaEventType.SequenceNumber:
if (num6 != 2)
{
throw new InvalidDataException("Invalid size in sequence-number event.");
}
track.Add(new SequenceNumberEvent(num5, (int)abinaryReader.Read16()), num3);
continue;
case MetaEventType.Text:
track.Add(new TextEvent(num5, abinaryReader.ReadRawString(num6)), num3);
continue;
case MetaEventType.CopyrightNotice:
track.Add(new CopyrightNoticeEvent(num5, abinaryReader.ReadRawString(num6)), num3);
continue;
case MetaEventType.Name:
track.Add(new TrackNameEvent(num5, abinaryReader.ReadRawString(num6)), num3);
continue;
case MetaEventType.InstrumentName:
track.Add(new InstrumentNameEvent(num5, abinaryReader.ReadRawString(num6)), num3);
continue;
case MetaEventType.Lyrics:
track.Add(new LyricsEvent(num5, abinaryReader.ReadRawString(num6)), num3);
continue;
case MetaEventType.Marker:
track.Add(new MarkerEvent(num5, abinaryReader.ReadRawString(num6)), num3);
continue;
case MetaEventType.CuePoint:
track.Add(new CuePointEvent(num5, abinaryReader.ReadRawString(num6)), num3);
continue;
default:
if (metaEventType2 != MetaEventType.ChannelPrefix)
{
if (metaEventType2 == MetaEventType.EndOfTrack)
{
if (num6 != 0)
{
throw new InvalidDataException("Invalid size in end-of-track event.");
}
track.Add(new EndOfTrackEvent(num5), num3);
continue;
}
}
else
{
if (num6 != 1)
{
throw new InvalidDataException("Invalid size in channel-prefix event.");
}
track.Add(new ChannelPrefixEvent(num5, abinaryReader.Read8()), num3);
continue;
}
break;
}
}
else if (metaEventType2 != MetaEventType.TempoChange)
{
switch (metaEventType2)
{
case MetaEventType.TimeSignature:
if (num6 != 4)
{
throw new InvalidDataException("Invalid size in time-signature event.");
}
track.Add(new TimeSignatureEvent(num5, (int)abinaryReader.Read8(), (int)abinaryReader.Read8(), (int)abinaryReader.Read8(), (int)abinaryReader.Read8()), num3);
continue;
case MetaEventType.KeySignature:
if (num6 != 2)
{
throw new InvalidDataException("Invalid size in key-signature event.");
}
track.Add(new KeySignatureEvent(num5, (int)abinaryReader.ReadS8(), (Scale)abinaryReader.Read8()), num3);
continue;
default:
if (metaEventType2 == MetaEventType.SequencerSpecific)
{
byte[] array = abinaryReader.Read8s(num6);
if (num6 == 0 || num6 < ((array[0] == 0) ? 3 : 1))
{
throw new InvalidDataException("Invalid size in sequencer-specific event.");
}
bool flag = array[0] == 0;
int manufacturerID = flag ? ((int)array[1] << 8 | (int)array[2]) : ((int)array[0]);
track.Add(new SequencerSpecificEvent(num5, manufacturerID, flag, array.Duplicate(flag ? 3 : 1, array.Length - (flag ? 3 : 1))), num3);
continue;
}
break;
}
}
else
{
if (num6 != 3)
{
throw new InvalidDataException("Invalid size in tempo-change event.");
}
track.Add(new TempoChangeEvent(num5, abinaryReader.Read24()), num3);
continue;
}
throw new NotImplementedException(string.Format("Encountered unimplemented meta event type {0}.", metaEventType));
}
else if (b2 == 240 || b2 == 247)
{
byte[] array2 = abinaryReader.Read8s((int)abinaryReader.ReadUIntVar());
if (array2.Length == 0 || array2.Length < ((array2[0] == 0) ? 3 : 1))
{
throw new InvalidDataException("Encountered a SysEx event with an invalid size.");
}
SystemExclusiveEventType type = SystemExclusiveEventType.Normal;
bool flag2 = b2 == 247;
bool flag3 = array2.Last <byte>() == 247;
bool flag4 = array2[0] == 0;
int manufacturerID2 = flag4 ? ((int)array2[1] << 8 | (int)array2[2]) : ((int)array2[0]);
if (flag2)
{
type = (flag3 ? SystemExclusiveEventType.Terminating : SystemExclusiveEventType.Continuation);
}
if (flag3)
{
array2 = array2.Duplicate(array2.Length - 1);
}
track.Add(new SystemExclusiveEvent(num5, type, manufacturerID2, flag4, array2), num3);
}
else
{
ChannelEventType channelEventType = (ChannelEventType)(b2 & 240);
byte channelNumber = (byte)(b2 & 15);
if (!channelEventType.IsDefined <ChannelEventType>())
{
throw new InvalidDataException(string.Format("Encountered undefined channel-event type {0}.", channelEventType));
}
ChannelEventType channelEventType2 = channelEventType;
if (channelEventType2 <= ChannelEventType.NoteAftertouch)
{
if (channelEventType2 == ChannelEventType.NoteOff)
{
track.Add(new NoteOffEvent(num5, (int)channelNumber, abinaryReader.Read8(), (int)abinaryReader.Read8()), num3);
continue;
}
if (channelEventType2 == ChannelEventType.NoteOn)
{
track.Add(new NoteOnEvent(num5, (int)channelNumber, (int)abinaryReader.Read8(), (int)abinaryReader.Read8()), num3);
continue;
}
if (channelEventType2 == ChannelEventType.NoteAftertouch)
{
track.Add(new NoteAftertouchEvent(num5, (int)channelNumber, (int)abinaryReader.Read8(), (int)abinaryReader.Read8()), num3);
continue;
}
}
else if (channelEventType2 <= ChannelEventType.ProgramChange)
{
if (channelEventType2 == ChannelEventType.Controller)
{
track.Add(new ControllerEvent(num5, (int)channelNumber, (int)abinaryReader.Read8(), (int)abinaryReader.Read8()), num3);
continue;
}
if (channelEventType2 == ChannelEventType.ProgramChange)
{
track.Add(new ProgramChangeEvent(num5, (int)channelNumber, (int)abinaryReader.Read8()), num3);
continue;
}
}
else
{
if (channelEventType2 == ChannelEventType.ChannelAftertouch)
{
track.Add(new ChannelAftertouchEvent(num5, (int)channelNumber, (int)abinaryReader.Read8()), num3);
continue;
}
if (channelEventType2 == ChannelEventType.PitchBend)
{
track.Add(new PitchBendEvent(num5, (int)channelNumber, (int)(abinaryReader.Read8() & 127) | (int)(abinaryReader.Read8() & 127) << 7), num3);
continue;
}
}
throw new NotImplementedException(string.Format("Encountered unimplemented channel event type {0}.", channelEventType));
}
}
midi.tracks.Add(track);
abinaryReader.ResetAnchor();
num2++;
}
return(midi);
}
public static Stream Decompress(string fileName)
{
if (!IsCompressed(fileName))
{
return File.OpenRead(fileName);
}
byte[] bytesToDecompress = File.ReadAllBytes(fileName);
using (ABinaryReader codeReader = new ABinaryReader(bytesToDecompress.ToMemoryStream(false, true), Endianness.Big, Encoding.GetEncoding(932)),
countReader = new ABinaryReader(bytesToDecompress.ToMemoryStream(false, true), Endianness.Big, Encoding.GetEncoding(932)),
dataReader = new ABinaryReader(bytesToDecompress.ToMemoryStream(false, true), Endianness.Big, Encoding.GetEncoding(932)))
{
// Parse the header.
string headerIdentifier = codeReader.ReadRawString(4);
int uncompressedSize = codeReader.ReadS32();
countReader.Position = codeReader.ReadS32();
dataReader.Position = codeReader.ReadS32();
// This is the buffer where we will put our decompressed data.
// I would use an ABinaryWriter for this, but we need to read/write from the same buffer for the RLE parts.
byte[] outputArray = new byte[uncompressedSize];
int outPosition = 0; // Our position in the destination buffer.
uint validBitsCount = 0; // The number of valid bits left in the code byte.
byte currentCodeByte = 0; // Our current code byte.
// Begin decompression.
while (outPosition < uncompressedSize)
{
// If the current code byte is used, get a new one.
if (validBitsCount <= 0)
{
currentCodeByte = codeReader.Read8();
validBitsCount = 8;
}
// If the next bit in the code byte is a 1, do a direct, 1:1 copy of the next data byte; otherwise, uncompress a chunk of data.
if ((currentCodeByte & 0x80) == 0x80)
{
outputArray[outPosition++] = dataReader.Read8();
}
else
{
// Read the count data.
ushort count = countReader.Read16();
// The last three nybbles represent the distance in the buffer to go back.
int distance = (count & 0xFFF);
// Calculate the position from which we start.
int startOffset = (outPosition - (distance + 1));
// The upper nybble of count; if zero, read a third byte and add 0x10.
int byteCount = ((count >> 12) & 0xF);
// If the upper nybble of the count is equal to zero, that means the number of bytes is too large for a nybble and is actually in the next whole byte.
// Add 0x10 to this byte's value, possibly to account for the original nybble. (How does Thakis figure this crap out?)
if (byteCount == 0)
{
byteCount = (dataReader.Read8() + 0x10);
}
// Take into consideration the two bytes for the count by adding two to the byte count.
byteCount += 2;
// Copy the run data.
Repeater.Repeat(byteCount, () => outputArray[outPosition++] = outputArray[startOffset++]);
}
// Get the next bit in the code byte.
currentCodeByte <<= 1;
validBitsCount--;
}
// Return the uncompressed data.
return outputArray.ToMemoryStream(false, true);
}
}