public EnvelopeLookup(PsyGlobal psyGlobal, VorbisInfo info)
{
_psyGlobal = psyGlobal;
var codecSetup = info.CodecSetup;
_minEnergy = codecSetup.PsyGlobalParam.PreEchoMinEnergy;
_cursor = codecSetup.BlockSizes[1] / 2;
_mdctWindow = new float[WindowLength];
_mdctLookup = new MdctLookup(WindowLength);
for (var i = 0; i < _mdctWindow.Length; i++)
{
_mdctWindow[i] = (float)Math.Sin(i / (WindowLength - 1.0) * Math.PI);
_mdctWindow[i] *= _mdctWindow[i];
}
_bands = new EnvelopeBand[PsyGlobal.EnvelopeBands];
// Magic follows
_bands[0] = new EnvelopeBand(2, 4);
_bands[1] = new EnvelopeBand(4, 5);
_bands[2] = new EnvelopeBand(6, 6);
_bands[3] = new EnvelopeBand(9, 8);
_bands[4] = new EnvelopeBand(13, 8);
_bands[5] = new EnvelopeBand(17, 8);
_bands[6] = new EnvelopeBand(22, 8);
_filters = Enumerable
.Range(0, PsyGlobal.EnvelopeBands * info.Channels)
.Select(s => new EnvelopeFilterState())
.ToArray();
_mark = new int[WindowLength];
}
public PsyGlobalLookup(PsyGlobal global)
{
_psyGlobal = global;
AmpMax = NegativeInfinite;
}
