public unsafe static FlacSubFrameBase GetSubFrame(FlacBitReader reader, FlacSubFrameData data, FlacFrameHeader header, int bps)
{
int wastedBits = 0, order = 0;
uint x = reader.ReadBits(8);
bool hasWastedBits = (x & 1) != 0;
x &= 0xFE; //1111 1110
if (hasWastedBits)
{
int u = (int)reader.ReadUnary();
wastedBits = u + 1;
bps -= wastedBits;
}
if ((x & 0x80) != 0)
{
Debug.WriteLine("Flacdecoder lost sync while reading FlacSubFrameHeader. [x & 0x80].");
return null;
}
FlacSubFrameBase subFrame;
if ((x > 2 && x < 16) ||
(x > 24 && x < 64))
{
Debug.WriteLine("Invalid FlacSubFrameHeader. [" + x.ToString("x") + "]");
return null;
}
if (x == 0)
{
subFrame = new FlacSubFrameConstant(reader, header, data, bps);
}
else if (x == 2)
{
//verbatim
subFrame = new FlacSubFrameVerbatim(reader, header, data, bps);
}
else if (x >= 16 && x <= 24)
{
//fixed
order = (int)((x >> 1) & 7);
subFrame = new FlacSubFrameFixed(reader, header, data, bps, order);
}
else if (x >= 64)
{
//lpc
order = (int)(((x >> 1) & 31) + 1);
subFrame = new FlacSubFrameLPC(reader, header, data, bps, order);
}
else
{
Debug.WriteLine("Invalid Flac-SubframeType: x = " + x + ".");
return null;
}
if (hasWastedBits)
{
int* ptrDest = data.DestBuffer;
for (int i = 0; i < header.BlockSize; i++)
{
*(ptrDest++) <<= wastedBits;
}
}
//System.Diagnostics.Debug.WriteLine(subFrame.GetType().Name);
//check null removed
subFrame.WastedBits = wastedBits;
return subFrame;
}
public unsafe static FlacSubFrameBase GetSubFrame(FlacBitReader reader, FlacSubFrameData data, FlacFrameHeader header, int bps)
{
int wastedBits = 0, order = 0;
uint x = reader.ReadBits(8);
bool hasWastedBits = (x & 1) != 0;
x &= 0xFE; //1111 1110
if (hasWastedBits)
{
int u = (int)reader.ReadUnary();
wastedBits = u + 1;
bps -= wastedBits;
}
if ((x & 0x80) != 0)
{
Debug.WriteLine("Flacdecoder lost sync while reading FlacSubFrameHeader. [x & 0x80].");
return(null);
}
FlacSubFrameBase subFrame;
if ((x > 2 && x < 16) ||
(x > 24 && x < 64))
{
Debug.WriteLine("Invalid FlacSubFrameHeader. [" + x.ToString("x") + "]");
return(null);
}
if (x == 0)
{
subFrame = new FlacSubFrameConstant(reader, header, data, bps);
}
else if (x == 2)
{
//verbatim
subFrame = new FlacSubFrameVerbatim(reader, header, data, bps);
}
else if (x >= 16 && x <= 24)
{
//fixed
order = (int)((x >> 1) & 7);
subFrame = new FlacSubFrameFixed(reader, header, data, bps, order);
}
else if (x >= 64)
{
//lpc
order = (int)(((x >> 1) & 31) + 1);
subFrame = new FlacSubFrameLPC(reader, header, data, bps, order);
}
else
{
Debug.WriteLine("Invalid Flac-SubframeType: x = " + x + ".");
return(null);
}
if (hasWastedBits)
{
int *ptrDest = data.DestBuffer;
for (int i = 0; i < header.BlockSize; i++)
{
*(ptrDest++) <<= wastedBits;
}
}
//System.Diagnostics.Debug.WriteLine(subFrame.GetType().Name);
//check null removed
subFrame.WastedBits = wastedBits;
return(subFrame);
}