public TopKFreqCoder(int K, IList<int> alphabet_freqs, ISymbolCoder not_freq_coder)
{
var top = new TopK<int> (K);
var n = alphabet_freqs.Count;
this.Dic = new int[K];
int i;
for (i = 0; i < n; ++i) {
top.Push (-alphabet_freqs [i], i);
}
i = 0;
foreach (var p in top.Items.Traverse()) {
this.Dic[i] = p.Value;
++i;
}
this.NotFreqCoder = not_freq_coder;
}
public void Load(BinaryReader Input)
{
var size = Input.ReadInt32 ();
this.SymbolCoder = SymbolCoderGenericIO.Load (Input);
this.Alphabet = new WTM_Leaf[size];
this.Root = this.LoadNode (Input, null) as WTM_Inner;
}
public void Build(IList<int> text, int alphabet_size, ISymbolCoder symbol_split = null, SequenceBuilder seq_builder = null)
{
if (symbol_split == null) {
symbol_split = new EqualSizeCoder(4, alphabet_size-1);
}
this.SymbolCoder = symbol_split;
var list = this.SymbolCoder.Encode(0, null);
var numbits = list[0].numbits;
var arity = (short)(1 << numbits);
this.Alphabet = new WTM_Leaf[alphabet_size];
this.Root = new WTM_Inner (arity, null, true);
for (int i = 0; i < text.Count; i++) {
this.Add (text [i], list);
}
if (seq_builder == null) {
seq_builder = SequenceBuilders.GetSeqPlain(arity);
}
this.FinishBuild (this.Root, seq_builder, arity);
}
public void Load(BinaryReader Input)
{
this.NotFreqCoder = SymbolCoderGenericIO.Load(Input);
this.Dic = ListIGenericIO.Load(Input);
}
public static SequenceBuilder GetWTM( ISymbolCoder symcoder = null, SequenceBuilder seq_builder = null)
{
return delegate (IList<int> seq, int sigma) {
var wt = new WTM();
wt.Build(seq, sigma, symcoder, seq_builder);
return wt;
};
}
