/// <summary>
/// Return image data
/// </summary>
public void HuffDecode(int[, ,] buffer)
{
int x, y, tmp;
int sz = X * Y;
int[,] Block = new int[8, 8];
int Cs, Ta, Td, blocks;
// Read in Scan Header information
Ls = dis.ReadInt();
Ns = dis.Read();
Cs = dis.Read();
Td = dis.Read();
Ta = Td & 0x0f;
Td >>= 4;
Ss = dis.Read();
Se = dis.Read();
Ah = dis.Read();
Al = Ah & 0x0f;
Ah >>= 4;
// Calculate the Number of blocks encoded
// blocks = X * Y / 64;
blocks = GetBlockCount() / 6;
// decode image data and return image data in array
for (j = 0; j < blocks; j++)
{
// Get DC coefficient
if (Td == 0)
{
hftbl = 0;
}
else
{
hftbl = 2;
}
tmp = DECODE();
Diff = Receive(tmp);
ZZ[0] = Pred + Extend(Diff, tmp);
Pred = ZZ[0];
// Get AC coefficients
if (Ta == 0)
{
hftbl = 1;
}
else
{
hftbl = 3;
}
Decode_AC_Coefficients();
// dezigzag and dequantize block
for (i = 0; i < 64; i++)
{
Block[deZZ[i, 0], deZZ[i, 1]] = ZZ[i] * QNT[0][i];
}
// store blocks in buffer
for (x = 0; x < 8; x++)
{
for (y = 0; y < 8; y++)
{
buffer[j, x, y] = Block[x, y];
}
}
}
dis.Close();
}