public override IntField Decode(Stream input)
{
// Read size
int w = (int)input.ReadUInt32Optim();
int h = (int)input.ReadUInt32Optim();
// Read probabilities
ulong[] probs = CodecUtil.LoadFreqs(input, TimwiCecCompressor.runLProbsProbs, RLE.MaxSymbol + 1);
// Read fields
int len = (int)input.ReadUInt32Optim();
ArithmeticCodingReader acr = new ArithmeticCodingReader(input, probs);
int[] fields = new int[len];
for (int p = 0; p < len; p++)
{
fields[p] = acr.ReadSymbol();
}
// Undo fieldcode
IntField transformed = CodecUtil.FieldcodeRunlengthsDe2(fields, w, h, RLE, this);
// Undo predictive transform
transformed.PredictionDeTransformXor(Seer);
transformed.ArgbFromField(0, 3);
return(transformed);
}
public static void TestData(int[] data, int symMax, int symDataMax, int rlStages, params int[] symRle)
{
//int[] trip;
//RunLengthCodec enc = new RunLengthCodec(symMax, symDataMax, rlStages, symRle);
//RunLengthCodec dec = new RunLengthCodec(symMax, symDataMax, rlStages, symRle);
//trip = dec.Decode(enc.Encode(data));
//Assert.IsTrue(data.SequenceEqual(trip));
//ulong[] probs = CodecUtil.CountValues(data);
//ArithmeticCodec enca = new ArithmeticCodec(probs);
//ArithmeticCodec deca = new ArithmeticCodec(probs);
//trip = deca.Decode(enca.Encode(data));
//Assert.IsTrue(data.SequenceEqual(trip));
if (symDataMax == 1)
{
//RunLength01Codec encz = new RunLength01Codec();
//RunLength01Codec decz = new RunLength01Codec();
//trip = decz.Decode(encz.Encode(data));
//Assert.IsTrue(data.SequenceEqual(trip));
//RunLength01MaxCodec enczm = new RunLength01MaxCodec(15);
//RunLength01MaxCodec deczm = new RunLength01MaxCodec(15);
//trip = deczm.Decode(enczm.Encode(data));
//Assert.IsTrue(data.SequenceEqual(trip));
//RunLength01MaxSmartCodec enczs = new RunLength01MaxSmartCodec(15);
//RunLength01MaxSmartCodec deczs = new RunLength01MaxSmartCodec(15);
//trip = deczs.Decode(enczs.Encode(data));
//Assert.IsTrue(data.SequenceEqual(trip));
}
{
ulong[] input = data.Select(val => (ulong)val).ToArray();
MemoryStream ms = new MemoryStream();
CodecUtil.SaveFreqs(ms, input, TimwiCecCompressor.runLProbsProbs, "");
ms.Position = 0;
ulong[] freqs = CodecUtil.LoadFreqs(ms, TimwiCecCompressor.runLProbsProbs, data.Length);
Assert.IsTrue(input.SequenceEqual(freqs));
}
}