protected override void Init(DataPacket packet)
{
var submapCount = 1;
if (packet.ReadBit()) submapCount += (int)packet.ReadBits(4);
// square polar mapping
var couplingSteps = 0;
if (packet.ReadBit())
{
couplingSteps = (int)packet.ReadBits(8) + 1;
}
var couplingBits = Utils.ilog(_vorbis._channels - 1);
CouplingSteps = new CouplingStep[couplingSteps];
for (int j = 0; j < couplingSteps; j++)
{
var magnitude = (int)packet.ReadBits(couplingBits);
var angle = (int)packet.ReadBits(couplingBits);
if (magnitude == angle || magnitude > _vorbis._channels - 1 || angle > _vorbis._channels - 1)
throw new Exception();
CouplingSteps[j] = new CouplingStep { Angle = angle, Magnitude = magnitude };
}
// reserved bits
if (packet.ReadBits(2) != 0UL) throw new Exception();
// channel multiplex
var mux = new int[_vorbis._channels];
if (submapCount > 1)
{
for (int c = 0; c < ChannelSubmap.Length; c++)
{
mux[c] = (int)packet.ReadBits(4);
if (mux[c] >= submapCount) throw new Exception();
}
}
// submaps
Submaps = new Submap[submapCount];
for (int j = 0; j < submapCount; j++)
{
packet.ReadBits(8); // unused placeholder
var floorNum = (int)packet.ReadBits(8);
if (floorNum >= _vorbis.Floors.Length) throw new Exception();
var residueNum = (int)packet.ReadBits(8);
if (residueNum >= _vorbis.Residues.Length) throw new Exception();
Submaps[j] = new Submap
{
Floor = _vorbis.Floors[floorNum],
Residue = _vorbis.Residues[floorNum]
};
}
ChannelSubmap = new Submap[_vorbis._channels];
for (int c = 0; c < ChannelSubmap.Length; c++)
{
ChannelSubmap[c] = Submaps[mux[c]];
}
}
protected override void Init(DataPacket packet)
{
var submapCount = 1;
if (packet.ReadBit())
{
submapCount += (int)packet.ReadBits(4);
}
// square polar mapping
var couplingSteps = 0;
if (packet.ReadBit())
{
couplingSteps = (int)packet.ReadBits(8) + 1;
}
var couplingBits = Utils.ilog(_vorbis._channels - 1);
CouplingSteps = new CouplingStep[couplingSteps];
for (int j = 0; j < couplingSteps; j++)
{
var magnitude = (int)packet.ReadBits(couplingBits);
var angle = (int)packet.ReadBits(couplingBits);
if (magnitude == angle || magnitude > _vorbis._channels - 1 || angle > _vorbis._channels - 1)
{
throw new InvalidDataException();
}
CouplingSteps[j] = new CouplingStep {
Angle = angle, Magnitude = magnitude
};
}
// reserved bits
if (packet.ReadBits(2) != 0UL)
{
throw new InvalidDataException();
}
// channel multiplex
var mux = new int[_vorbis._channels];
if (submapCount > 1)
{
for (int c = 0; c < ChannelSubmap.Length; c++)
{
mux[c] = (int)packet.ReadBits(4);
if (mux[c] >= submapCount)
{
throw new InvalidDataException();
}
}
}
// submaps
Submaps = new Submap[submapCount];
for (int j = 0; j < submapCount; j++)
{
packet.ReadBits(8); // unused placeholder
var floorNum = (int)packet.ReadBits(8);
if (floorNum >= _vorbis.Floors.Length)
{
throw new InvalidDataException();
}
var residueNum = (int)packet.ReadBits(8);
if (residueNum >= _vorbis.Residues.Length)
{
throw new InvalidDataException();
}
Submaps[j] = new Submap
{
Floor = _vorbis.Floors[floorNum],
Residue = _vorbis.Residues[floorNum]
};
}
ChannelSubmap = new Submap[_vorbis._channels];
for (int c = 0; c < ChannelSubmap.Length; c++)
{
ChannelSubmap[c] = Submaps[mux[c]];
}
}
public override void Init(DataPacket packet)
{
int num = 1;
if (packet.ReadBit())
{
num += (int)packet.ReadBits(4);
}
int num2 = 0;
if (packet.ReadBit())
{
num2 = (int)packet.ReadBits(8) + 1;
}
int count = Utils.ilog(_vorbis._channels - 1);
CouplingSteps = new CouplingStep[num2];
for (int i = 0; i < num2; i++)
{
int num3 = (int)packet.ReadBits(count);
int num4 = (int)packet.ReadBits(count);
if (num3 == num4 || num3 > _vorbis._channels - 1 || num4 > _vorbis._channels - 1)
{
throw new InvalidDataException();
}
CouplingSteps[i] = new CouplingStep
{
Angle = num4,
Magnitude = num3
};
}
if (packet.ReadBits(2) != 0L)
{
throw new InvalidDataException();
}
int[] array = new int[_vorbis._channels];
if (num > 1)
{
for (int j = 0; j < ChannelSubmap.Length; j++)
{
array[j] = (int)packet.ReadBits(4);
if (array[j] >= num)
{
throw new InvalidDataException();
}
}
}
Submaps = new Submap[num];
for (int k = 0; k < num; k++)
{
packet.ReadBits(8);
int num5 = (int)packet.ReadBits(8);
if (num5 >= _vorbis.Floors.Length)
{
throw new InvalidDataException();
}
if ((int)packet.ReadBits(8) >= _vorbis.Residues.Length)
{
throw new InvalidDataException();
}
Submaps[k] = new Submap
{
Floor = _vorbis.Floors[num5],
Residue = _vorbis.Residues[num5]
};
}
ChannelSubmap = new Submap[_vorbis._channels];
for (int l = 0; l < ChannelSubmap.Length; l++)
{
ChannelSubmap[l] = Submaps[array[l]];
}
}
