public ISound Decode(VagChunk chunk)
{
return(new Sound
{
Samples = _vagSplitter.Split(chunk)
});
}
private IEnumerable <ISample> SplitInternal(VagChunk chunk)
{
if (chunk.Channels == 1)
{
var length = (int)(chunk.Length ?? chunk.Data.Length);
var totalSamples = length * 28 / 16;
var output = new float[totalSamples];
_vagDecrypter.Decrypt(chunk.Data, output, length, new VagState());
yield return(new Sample
{
Data = output
});
}
else
{
var interleave = chunk.Interleave;
var interval = interleave * chunk.Channels;
var buffer = new float[interleave * 28 / 16];
var length = chunk.Length ?? chunk.Data.Length;
for (var channel = 0; channel < chunk.Channels; channel++)
{
var output = new List <float>();
var state = new VagState();
var offset = channel * interleave;
while (offset < length)
{
_vagDecrypter.Decrypt(chunk.Data.AsSpan(offset), buffer, interleave, state);
offset += interval;
output.AddRange(buffer);
}
yield return(new Sample
{
Data = output
});
}
}
}
public IList <ISample> Split(VagChunk chunk)
{
return(SplitInternal(chunk).AsParallel().ToList());
}
