/** Picture:
* @param b payload buffer
* @param d decoder of the picture
*
* The b buffer should only point to the payload data section of
* the picture (not the header). The only methods that would ever need
* to be called are parse(), decode(), and getImage(). However,
* one should check wether the error variable is set before and after
* calling a method. One should not call them in any other order than that
* just specified. Each can be called without arguments and should not be
* called twice. */
public Picture(Buffer b, Decoder d)
{
num = b.GetInt(13);
code = b.GetByte(4);
buf = b;
dec = d;
par = new Parameters(code);
coeffs = new SubBand[3][];
coeffs[0] = new SubBand[19];
coeffs[1] = new SubBand[19];
coeffs[2] = new SubBand[19];
motion_buffers = new Buffer[9];
status = Decoder.Status.NULL;
}
private void ParseTransformData(Unpack u)
{
int q,l;
Buffer b;
for(int c = 0; c < 3; c++) {
for(int i = 0; i < 1+3*par.transformDepth; i++) {
u.Align();
l = u.DecodeUint();
if( l != 0) {
q = u.DecodeUint();
b = u.GetSubBuffer(l);
} else {
q = 0;
b = null;
}
coeffs[c][i] = new SubBand(b,q,par);
coeffs[c][i].CalculateSizes(i, c == 0);
}
}
}