// Token: 0x06002819 RID: 10265 RVA: 0x00091C0C File Offset: 0x0008FE0C
private void InitCategoryfloat()
{
int num = 1;
int num2 = 2;
for (int i = 1; i <= 15; i++)
{
for (int j = num; j < num2; j++)
{
this.category[32767 + j] = i;
global::JPGEncoder.BitString bitString = default(global::JPGEncoder.BitString);
bitString.length = i;
bitString.value = j;
this.bitcode[32767 + j] = bitString;
}
for (int j = -(num2 - 1); j <= -num; j++)
{
this.category[32767 + j] = i;
global::JPGEncoder.BitString bitString = default(global::JPGEncoder.BitString);
bitString.length = i;
bitString.value = num2 - 1 + j;
this.bitcode[32767 + j] = bitString;
}
num <<= 1;
num2 <<= 1;
}
}
// Token: 0x0600281B RID: 10267 RVA: 0x00091D1C File Offset: 0x0008FF1C
private void WriteBits(global::JPGEncoder.BitString bs)
{
int value = bs.value;
int i = bs.length - 1;
while (i >= 0)
{
if (((long)value & (long)((ulong)Convert.ToUInt32(1 << i))) != 0L)
{
this.bytenew |= Convert.ToUInt32(1 << this.bytepos);
}
i--;
this.bytepos--;
if (this.bytepos < 0)
{
if (this.bytenew == 255u)
{
this.WriteByte(byte.MaxValue);
this.WriteByte(0);
}
else
{
this.WriteByte((byte)this.bytenew);
}
this.bytepos = 7;
this.bytenew = 0u;
}
}
}
// Token: 0x06002824 RID: 10276 RVA: 0x0009243C File Offset: 0x0009063C
private float ProcessDU(float[] CDU, float[] fdtbl, float DC, global::JPGEncoder.BitString[] HTDC, global::JPGEncoder.BitString[] HTAC)
{
global::JPGEncoder.BitString bs = HTAC[0];
global::JPGEncoder.BitString bs2 = HTAC[240];
float[] array = this.FDCTQuant(CDU, fdtbl);
for (int i = 0; i < 64; i++)
{
this.DU[this.ZigZag[i]] = (int)array[i];
}
int num = (int)((float)this.DU[0] - DC);
DC = (float)this.DU[0];
if (num == 0)
{
this.WriteBits(HTDC[0]);
}
else
{
this.WriteBits(HTDC[this.category[32767 + num]]);
this.WriteBits(this.bitcode[32767 + num]);
}
int num2 = 63;
while (num2 > 0 && this.DU[num2] == 0)
{
num2--;
}
if (num2 == 0)
{
this.WriteBits(bs);
return(DC);
}
for (int i = 1; i <= num2; i++)
{
int num3 = i;
while (this.DU[i] == 0 && i <= num2)
{
i++;
}
int num4 = i - num3;
if (num4 >= 16)
{
for (int j = 1; j <= num4 / 16; j++)
{
this.WriteBits(bs2);
}
num4 &= 15;
}
this.WriteBits(HTAC[num4 * 16 + this.category[32767 + this.DU[i]]]);
this.WriteBits(this.bitcode[32767 + this.DU[i]]);
}
if (num2 != 63)
{
this.WriteBits(bs);
}
return(DC);
}
// Token: 0x06002817 RID: 10263 RVA: 0x00091B10 File Offset: 0x0008FD10
private global::JPGEncoder.BitString[] ComputeHuffmanTbl(byte[] nrcodes, byte[] std_table)
{
int num = 0;
int num2 = 0;
global::JPGEncoder.BitString[] array = new global::JPGEncoder.BitString[256];
for (int i = 1; i <= 16; i++)
{
for (int j = 1; j <= (int)nrcodes[i]; j++)
{
array[(int)std_table[num2]] = default(global::JPGEncoder.BitString);
array[(int)std_table[num2]].value = num;
array[(int)std_table[num2]].length = i;
num2++;
num++;
}
num *= 2;
}
return(array);
}
