public static List <DcCategoryEncodedPair> GetAllDCs(ColorChannel channel)
{
List <DcCategoryEncodedPair> result = new List <DcCategoryEncodedPair>(channel.GetNumOfBlocks());
for (int i = 0; i < channel.GetNumOfBlocks(); i++)
{
result.Add(CalculateDifferenceDc(channel, i));
}
return(result);
}
private void QuantizeChannel(ColorChannel channel, DoubleMatrix quantizationTable)
{
for (int i = 0; i < channel.GetNumOfBlocks(); i++)
{
CosineTransformation.Quantize(channel.GetBlock(i), quantizationTable);
}
}
private CountdownEvent TransformChannel(ColorChannel channel)
{
CountdownEvent e = new CountdownEvent(1);
int blockCount = channel.GetNumOfBlocks();
if (blockCount < 500 >> 4)
{
for (int i = 0; i < channel.GetNumOfBlocks(); i++)
{
Arai.Calc(channel.GetBlock(i));
}
}
else
{
int threadCount = 8;
if (blockCount < 1000 >> 4)
{
threadCount = 4;
}
for (int i = 0; i < blockCount; i += blockCount / threadCount)
{
e.AddCount();
ThreadPool.QueueUserWorkItem(
state =>
{
object[] inp = state as object[];
//Console.WriteLine($"Thread with block {(int) inp[0]} to block {(int) inp[1]} started...");
int upper = (int)inp[1];
for (int j = (int)inp[0]; j < upper; j++)
{
Arai.Calc(channel.GetBlock(j));
}
e.Signal();
}, new object[] { i, i + (blockCount / threadCount) });
}
}
e.Signal();
return(e);
}
public static List <AcCategoryEncodedPair> GetAllACs(ColorChannel channel)
{
List <AcCategoryEncodedPair> result = new List <AcCategoryEncodedPair>();
for (int i = 0; i < channel.GetNumOfBlocks(); i++)
{
DoubleMatrix block = channel.GetBlock(i);
List <AcRunlengthEncodedPair> runLengthEncodedBlock = EncodeRunlength(Util.ZigzagSort(block));
List <AcCategoryEncodedPair> categoryEncodedBlock = EncodeCategoriesAc(runLengthEncodedBlock);
result.AddRange(categoryEncodedBlock);
}
return(result);
}
public int Call()
{
int count = 0;
Stopwatch stopwatch = Stopwatch.StartNew();
while (stopwatch.ElapsedMilliseconds < 10000)
{
foreach (DoubleMatrix block in _channel.GetBlocks(0, _channel.GetNumOfBlocks()))
{
DCT.Advanced(block);
}
count++;
}
stopwatch.Stop();
return(count);
}