internal void decode_ac_coefficients(JPEGBinaryReader JPEGStream, float[] zz)
{
int num;
for (num = 1; num < 64; num++)
{
int num2 = ACTable.Decode(JPEGStream);
int num3 = num2 >> 4;
num2 &= 0xF;
if (num2 != 0)
{
num += num3;
num3 = JPEGStream.ReadBits(num2);
num2 = HuffmanTable.Extend(num3, num2);
zz[num] = num2;
}
else
{
if (num3 != 15)
{
break;
}
num += 15;
}
}
}
/// <summary>
/// Generated from text on F-23, F.13 - Huffman decoded of AC coefficients
/// on ISO DIS 10918-1. Requirements and Guidelines.
/// </summary>
internal void decode_ac_coefficients(JPEGBinaryReader JPEGStream, float[] zz)
{
for (int k = 1; k < 64; k++)
{
int s = ACTable.Decode(JPEGStream);
int r = s >> 4;
s &= 15;
if (s != 0)
{
k += r;
r = (int)JPEGStream.ReadBits(s);
s = (int)HuffmanTable.Extend(r, s);
zz[k] = s;
}
else
{
if (r != 15)
{
//throw new JPEGMarkerFoundException();
return;
}
k += 15;
}
}
}
public float decode_dc_coefficient(JPEGBinaryReader JPEGStream)
{
int num = DCTable.Decode(JPEGStream);
float num2 = JPEGStream.ReadBits(num);
num2 = HuffmanTable.Extend((int)num2, num);
return(previousDC += num2);
}
public void DecodeDCFirst(JPEGBinaryReader stream, float[] dest)
{
int num = DCTable.Decode(stream);
num = HuffmanTable.Extend(stream.ReadBits(num), num);
num = (int)previousDC + num;
previousDC = num;
dest[0] = num << successiveLow;
}
/// <summary>
/// Generated from text on F-22, F.2.2.1 - Huffman decoding of DC
/// coefficients on ISO DIS 10918-1. Requirements and Guidelines.
/// </summary>
/// <param name="JPEGStream">Stream that contains huffman bits</param>
/// <returns>DC coefficient</returns>
public float decode_dc_coefficient(JPEGBinaryReader JPEGStream)
{
int t = DCTable.Decode(JPEGStream);
float diff = JPEGStream.ReadBits(t);
diff = HuffmanTable.Extend((int)diff, t);
diff = (previousDC + diff);
previousDC = diff;
return(diff);
}
public void DecodeDCFirst(JPEGBinaryReader stream, float[] dest)
{
float[] numArray = new float[0x40];
int t = this.DCTable.Decode(stream);
t = HuffmanTable.Extend(stream.ReadBits(t), t);
t = ((int)this.previousDC) + t;
this.previousDC = t;
dest[0] = t << this.successiveLow;
}
public void DecodeDCFirst(JPEGBinaryReader stream, float[] dest)
{
//float[] datablock = new float[64];
int s = DCTable.Decode(stream);
int r = stream.ReadBits(s);
s = HuffmanTable.Extend(r, s);
s = (int)previousDC + s;
previousDC = s;
dest[0] = s << successiveLow;
}
public void DecodeACFirst(JPEGBinaryReader stream, float[] zz)
{
if (stream.eob_run > 0)
{
stream.eob_run--;
return;
}
for (int k = spectralStart; k <= spectralEnd; k++)
{
int s = ACTable.Decode(stream);
int r = s >> 4;
s &= 15;
if (s != 0)
{
k += r;
r = (int)stream.ReadBits(s);
s = (int)HuffmanTable.Extend(r, s);
zz[k] = s << successiveLow;
}
else
{
if (r != 15)
{
stream.eob_run = 1 << r;
if (r != 0)
{
stream.eob_run += stream.ReadBits(r);
}
stream.eob_run--;
break;
}
k += 15;
}
}
}
public void DecodeACFirst(JPEGBinaryReader stream, float[] zz)
{
if (stream.eob_run > 0)
{
stream.eob_run--;
return;
}
int num = spectralStart;
int num3;
while (true)
{
if (num > spectralEnd)
{
return;
}
int num2 = ACTable.Decode(stream);
num3 = num2 >> 4;
num2 &= 0xF;
if (num2 != 0)
{
num += num3;
num3 = stream.ReadBits(num2);
num2 = HuffmanTable.Extend(num3, num2);
zz[num] = num2 << successiveLow;
}
else
{
if (num3 != 15)
{
break;
}
num += 15;
}
num++;
}
stream.eob_run = 1 << num3;
if (num3 != 0)
{
stream.eob_run += stream.ReadBits(num3);
}
stream.eob_run--;
}
internal void decode_ac_coefficients(JPEGBinaryReader JPEGStream, float[] zz)
{
for (int i = 1; i < 0x40; i++)
{
int t = this.ACTable.Decode(JPEGStream);
int num3 = t >> 4;
t &= 15;
if (t != 0)
{
i += num3;
zz[i] = HuffmanTable.Extend(JPEGStream.ReadBits(t), t);
}
else
{
if (num3 != 15)
{
break;
}
i += 15;
}
}
}
public void DecodeACFirst(JPEGBinaryReader stream, float[] zz)
{
if (stream.eob_run > 0)
{
stream.eob_run--;
}
else
{
for (int i = this.spectralStart; i <= this.spectralEnd; i++)
{
int t = this.ACTable.Decode(stream);
int n = t >> 4;
t &= 15;
if (t != 0)
{
i += n;
t = HuffmanTable.Extend(stream.ReadBits(t), t);
zz[i] = t << this.successiveLow;
}
else
{
if (n != 15)
{
stream.eob_run = ((int)1) << n;
if (n != 0)
{
stream.eob_run += stream.ReadBits(n);
}
stream.eob_run--;
break;
}
i += 15;
}
}
}
}
