public void readHeaderFromStream(Stream stream)
{
long startSamplePosition = stream.Position;
sizeInBytes = ModuleUtils.ReadDWord(stream);
loopStart = ModuleUtils.ReadDWord(stream);
loopLength = ModuleUtils.ReadDWord(stream);
byte vol = ModuleUtils.ReadByte(stream);
volume = (vol >= 64) ? 1.0f : (float)vol / 64.0f;
finetune = (sbyte)ModuleUtils.ReadSignedByte(stream);
type = ModuleUtils.ReadByte(stream);
panning = ModuleUtils.ReadByte(stream);
relativeNoteNumber = (sbyte)ModuleUtils.ReadSignedByte(stream);
packedType = ModuleUtils.ReadByte(stream);
name = ModuleUtils.ReadString0(stream, 22);
length = ((type & 0x10) != 0) ? sizeInBytes >> 1 : sizeInBytes;
loopType = (byte)(type & 0x03);
is16Bits = (type & 0x10) != 0;
loopStart = is16Bits ? loopStart >> 1 : loopStart;
loopLength = is16Bits ? loopLength >> 1 : loopLength;
loopEnd = loopStart + loopLength;
loopEnd = (loopEnd > length) ? length : loopEnd;
loopStart = (loopStart > length) ? length : loopStart;
relativeNoteNumber = 0;
//stream.Seek(startSamplePosition + 40, SeekOrigin.Begin);
}
private void ReadArrangement(Stream stream)
{
arrangement.Clear();
for (int i = 0; i < 256; i++)
{
byte patNum = ModuleUtils.ReadByte(stream);
if (i < songLength)
{
arrangement.Add(patNum);
}
}
}
private XM_PatternChannel CreateNewPatternChannel(Stream stream, uint numberOfSamples)
{
XM_PatternChannel channel = new XM_PatternChannel();
byte b0 = ModuleUtils.ReadByte(stream);
if ((b0 & 0x80) != 0)
{
if ((b0 & 0x01) != 0)
{
channel.noteIndex = ModuleUtils.ReadByte(stream);
}
if ((b0 & 0x02) != 0)
{
channel.instrumentIndex = ModuleUtils.ReadByte(stream);
}
if ((b0 & 0x04) != 0)
{
channel.volumeEffect = ModuleUtils.ReadByte(stream);
}
if ((b0 & 0x08) != 0)
{
channel.effekt = ModuleUtils.ReadByte(stream);
}
if ((b0 & 0x10) != 0)
{
channel.effektOp = ModuleUtils.ReadByte(stream);
}
}
else
{
channel.noteIndex = (byte)(b0 & 0x7F);
channel.instrumentIndex = ModuleUtils.ReadByte(stream);
channel.volumeEffect = ModuleUtils.ReadByte(stream);
channel.effekt = ModuleUtils.ReadByte(stream);
channel.effektOp = ModuleUtils.ReadByte(stream);
}
if (channel.noteIndex > 0 && channel.noteIndex < 97 && channel.volumeEffect == 0)
{
channel.volumeEffect = 0x50;
}
return(channel);
}
public void ReadPatternData(Stream stream, string moduleID, uint numberOfChannels, uint numberOfSamples)
{
headerLength = ModuleUtils.ReadDWord(stream);
packingType = ModuleUtils.ReadByte(stream);
numberOfRows = ModuleUtils.ReadWord(stream);
packedSize = ModuleUtils.ReadWord(stream);
long patternEndPosition = stream.Position + packedSize;
patternRows.Clear();
for (int row = 0; row < numberOfRows; row++)
{
ModulePatternRow pRow = new ModulePatternRow();
for (int channel = 0; channel < numberOfChannels; channel++)
{
pRow.patternChannels.Add(CreateNewPatternChannel(stream, numberOfSamples));
}
patternRows.Add(pRow);
}
stream.Seek(patternEndPosition, SeekOrigin.Begin);
}
public void ReadFromStream(Stream stream, ref uint sampleOrder)
{
long startInstrumentPosition = stream.Position;
instrumentSize = ModuleUtils.ReadDWord(stream);
name = ModuleUtils.ReadString0(stream, 22);
instrumentType = ModuleUtils.ReadByte(stream); // Length
samplesNumber = ModuleUtils.ReadWord(stream);
samples.Clear();
if (samplesNumber > 0)
{
headerSize = ModuleUtils.ReadDWord(stream);
for (uint i = 0; i < 96; i++)
{
keymapAssignements.Add(ModuleUtils.ReadByte(stream));
}
for (uint i = 0; i < 24; i++)
{
pointsForVolumeEnvelope.Add(ModuleUtils.ReadWord(stream));
}
for (uint i = 0; i < 24; i++)
{
pointsForPanningEnvelope.Add(ModuleUtils.ReadWord(stream));
}
numberOfVolumePoints = ModuleUtils.ReadByte(stream);
numberOfPanningPoints = ModuleUtils.ReadByte(stream);
volumeSustainPoint = ModuleUtils.ReadByte(stream);
volumeLoopStartPoint = ModuleUtils.ReadByte(stream);
volumeLoopEndPoint = ModuleUtils.ReadByte(stream);
panningSustainPoint = ModuleUtils.ReadByte(stream);
panningLoopStartPoint = ModuleUtils.ReadByte(stream);
panningLoopEndPoint = ModuleUtils.ReadByte(stream);
volumeType = ModuleUtils.ReadByte(stream); // bit 0: On; 1: Sustain; 2: Loop;
panningType = ModuleUtils.ReadByte(stream); // bit 0: On; 1: Sustain; 2: Loop;
vibratoType = ModuleUtils.ReadByte(stream);
vibratoSweep = ModuleUtils.ReadByte(stream);
vibratoDepth = ModuleUtils.ReadByte(stream);
vibratoRate = ModuleUtils.ReadByte(stream);
volumeFadeout = ModuleUtils.ReadWord(stream);
//for (uint i = 0; i < 22; i++) reserved.Add(ModuleUtils.ReadByte(stream));
//System.Diagnostics.Debug.WriteLine("Seek : " + stream.Position + " " + (instrumentSize - 243) + "\n");
stream.Seek(instrumentSize - 241, SeekOrigin.Current);
long sampleDataLength = 0;
for (uint i = 0; i < samplesNumber; i++)
{
var sample = new XM_Sample();
sample.readHeaderFromStream(stream);
sample.orderNumber = sampleOrder++;
samples.Add(sample);
sampleDataLength += sample.sizeInBytes;
}
long startSampleDataPosition = stream.Position;
foreach (XM_Sample sample in samples)
{
sample.readSampleDataFromStream(stream);
}
stream.Seek(startSampleDataPosition + sampleDataLength, SeekOrigin.Begin);
}
else
{
stream.Seek(startInstrumentPosition + instrumentSize, SeekOrigin.Begin);
}
sample = (samples.Count > 0) ? samples[0] : null;
if (sample != null)
{
volume = sample.volume;
}
}
