void NaiveBayesianClassifier::changeWordCount(const QString &category, const QString &word, int change)
{
long idxsearch=-1;
c4_Row findrow;
c4_StringProp match("word");
const char* test = word;
match(findrow) = test;
c4_IntProp count("count");
c4_View cat = getCategory(category);
idxsearch = cat.Find(findrow,idxsearch+1);
if (idxsearch>=0) {
long int zero = 0;
count(cat[idxsearch]) = std::max(zero, count(cat[idxsearch]) + change);
}
else
{
c4_StringProp newWord("word");
c4_IntProp newCount("count");
c4_Row newRow;
QString temp = QString(word);
newWord(newRow)=temp;
newCount(newRow)=1;
cat.Add(newRow);
}
}
void NaiveBayesianClassifier::changeCount(const QString &category, int change)
{
long idxsearch=-1;
c4_Row findrow;
c4_StringProp match("name");
match(findrow)=category;
c4_IntProp count("count");
c4_View catCount = getDatabase().GetAs("categories[name:S,count:I]");
idxsearch = catCount.Find(findrow,idxsearch+1);
if (idxsearch>=0)
{
long zero = 0;
count(catCount[idxsearch]) = std::max(zero, count(catCount[idxsearch]) + change);
}
else
{
c4_StringProp newCat("name");
c4_IntProp newCount("count");
c4_Row newRow;
newCat(newRow)=category;
newCount(newRow)=std::max(0, change);
catCount.Add(newRow);
}
}
/**
* adds a new title to the current playlist
*
* Core functionality of the mixplay architecture:
* - does not play the same artist twice in a row
* - prefers titles with lower playcount
*
* returns the head of the (new/current) playlist
*/
mpplaylist *addNewTitle( mpplaylist *pl, mptitle *root ) {
mptitle *runner=NULL;
mptitle *guard=NULL;
unsigned long num=0;
char *lastpat;
unsigned int pcount=getConfig()->playcount;
unsigned int cycles=0;
int valid=0;
/* 0 - nothing checked
1 - namecheck okay
2 - playcount okay
3 - all okay
-1 - stuffing
*/
if( pl != NULL ) {
while( pl->next != NULL ) {
pl=pl->next;
}
runner=pl->title;
lastpat=pl->title->artist ;
}
else {
valid=1;
runner=root;
}
/* select a random title from the database */
/* skip forward until a title is found that is neither DNP nor MARK */
num = countTitles( MP_ALL, MP_DNP|MP_MARK|MP_CNTD );
runner=skipTitles( runner, rand()%num );
if( runner==NULL ) {
if( pl == NULL ) {
addMessage( 0, "No titles in database and no playlist to add them to.." );
return NULL;
}
runner=pl->title;
addMessage( 0, "Next round!" );
newCount( );
/* Try again */
num = countTitles( MP_ALL, MP_DNP|MP_MARK|MP_CNTD );
runner=skipTitles( runner, rand()%num );
if( runner == NULL ) {
addMessage( 0, "No more titles in the database!?" );
return NULL;
}
}
cycles=0;
while( ( valid & 3 ) != 3 ) {
if( lastpat == NULL ) valid |=1;
/* title did not pass namecheck */
if( ( valid & 1 ) != 1 ) {
guard=runner;
while( checkSim( runner->artist, lastpat ) ) {
addMessage( 3, "%s = %s", runner->artist, lastpat );
activity( "Nameskipping" );
runner=skipOver( runner->next, 1 );
/* hopefully this will not happen */
if( (runner == guard ) || ( runner == NULL ) ) {
addMessage( 0, "Only %s left..", lastpat );
newCount( );
return( addNewTitle( pl, root ) );
}
}
addMessage( 3, "%s != %s", runner->artist, lastpat );
if( guard != runner ) {
valid=1; /* we skipped and need to check playcount */
}
else {
valid |= 1; /* we did not skip, so if playcount was fine it's still fine */
}
}
guard=runner;
/* title did not pass playcountcheck and we are not in stuffing mode */
while( (valid & 2 ) != 2 ) {
if( runner->flags & MP_FAV ) {
if ( runner-> playcount <= 2*pcount ) {
valid|=2;
}
}
else {
if ( runner->playcount <= pcount ) {
valid|=2;
}
}
if( ( valid & 2 ) != 2 ) {
activity( "Playcountskipping" );
/* simply pick a new title at random to avoid edge cases */
runner=skipTitles( runner, rand()%num );
valid=0;
if( (runner == NULL ) || ( guard == runner ) ) {
pcount++; /* allow more replays */
getConfig()->playcount=pcount;
addMessage( 1, "Increasing maxplaycount to %li", pcount );
runner=guard;
}
}
}
if( ++cycles > 10 ) {
addMessage( 1, "Looks like we ran into a loop" );
cycles=0;
pcount++; /* allow replays */
getConfig()->playcount=pcount;
addMessage( 1, "Increasing maxplaycount to %li", pcount );
}
} /* while( valid != 3 ) */
addMessage( 3, "[+] (%i/%li/%3s) %s", runner->playcount, pcount, ONOFF( runner->flags&MP_FAV ), runner->display );
/* count again in case this is a favourite */
if( runner->flags & MP_FAV ) {
runner->flags &= ~MP_CNTD;
}
addMessage(2,"Added %2d %5d - %s", runner->playcount, runner->key, runner->display );
return appendToPL( runner, pl, -1 );
}
Counter Counter::operator+(Counter rhs) {
Counter newCount(this -> getCount() + rhs.getCount());
return newCount;
}
