package edu.cmu.sphinx.decoder.search.stats;
import edu.cmu.sphinx.decoder.search.Token;
import edu.cmu.sphinx.linguist.HMMSearchState;
import edu.cmu.sphinx.linguist.SearchState;
import edu.cmu.sphinx.linguist.UnitSearchState;
import edu.cmu.sphinx.linguist.WordSearchState;
import edu.cmu.sphinx.linguist.acoustic.HMM;
/**
* A tool for tracking the types tokens created and placed in the beam
* <p/>
* TODO: Develop a mechanism for adding trackers such as these in a more general fashion.
*/
public class TokenTypeTracker {
// keep track of the various types of states
private int numWords;
private int numUnits;
private int numOthers;
private int numHMMBegin;
private int numHMMEnd;
private int numHMMSingle;
private int numHMMInternal;
private int numTokens;
/**
* Adds a token to this tracker. Records statistics about the type of token.
*
* @param t the token to track
*/
public void add(Token t) {
numTokens++;
SearchState s = t.getSearchState();
if (s instanceof WordSearchState) {
numWords++;
} else if (s instanceof UnitSearchState) {
numUnits++;
} else if (s instanceof HMMSearchState) {
HMM hmm = ((HMMSearchState) s).getHMMState().getHMM();
switch (hmm.getPosition()) {
case BEGIN: numHMMBegin++; break;
case END: numHMMEnd++; break;
case SINGLE: numHMMSingle++; break;
case INTERNAL: numHMMInternal++; break;
default: break;
}
} else {
numOthers++;
}
}
/** Shows the accumulated statistics */
public void dump() {
System.out.println("TotalTokens: " + numTokens);
System.out.println(" Words: " + numWords + pc(numWords));
System.out.println(" Units: " + numUnits + pc(numUnits));
System.out.println(" HMM-b: " + numHMMBegin + pc(numHMMBegin));
System.out.println(" HMM-e: " + numHMMEnd + pc(numHMMEnd));
System.out.println(" HMM-s: " + numHMMSingle + pc(numHMMSingle));
System.out.println(" HMM-i: " + numHMMInternal +
pc(numHMMInternal));
System.out.println(" Others: " + numOthers + pc(numOthers));
}
/**
* Utility method for generating integer percents
*
* @param num the value to be converted into percent
* @return a string representation as a percent
*/
private String pc(int num) {
int percent = ((100 * num) / numTokens);
return " (" + percent + "%)";
}
}