view pertrackaccumulator.h @ 496:8fb85fbcaba6 api-inversion

Mostly disentangle API from command-line binary.

Now audioDB.cpp doesn't need to be included in the library, because
nothing the library does creates an audioDB instance.  Hooray.  We can't
disentangle the other way, because there's still plenty in the
command-line binary that isn't implemented in terms of the API, so the
audioDB binary code needs to know naughty stuff about the library's
internals (e.g. what the file header looks like).

Remove liszt.o and sample.o from the library, even though they'll
probably make a reapparance soon (for scare-quoted values of "soon")

Remove cmdline.o and common.o from the library, not scheduled to make a
reapparence ever (hooray!).  Separate out the bits that are used in the
library -- locks and PointPairs -- into their own files.

template <class T> class PerTrackAccumulator : public Accumulator {
public:
  PerTrackAccumulator(unsigned int pointNN, unsigned int trackNN);
  ~PerTrackAccumulator();
  void add_point(adb_result_t *r);
  adb_query_results_t *get_points();
private:
  unsigned int pointNN;
  unsigned int trackNN;
  std::map<adb_result_t, std::priority_queue< adb_result_t, std::vector<adb_result_t>, T > *, adb_result_key_lt> *queues;
  std::set< adb_result_t, adb_result_triple_lt > *set;
};

template <class T> PerTrackAccumulator<T>::PerTrackAccumulator(unsigned int pointNN, unsigned int trackNN)
  : pointNN(pointNN), trackNN(trackNN), queues(0), set(0) {
  queues = new std::map<adb_result_t, std::priority_queue< adb_result_t, std::vector<adb_result_t>, T > *, adb_result_key_lt>;
  set = new std::set< adb_result_t, adb_result_triple_lt >;
}

template <class T> PerTrackAccumulator<T>::~PerTrackAccumulator() {
  if(queues) {
    typename std::map< adb_result_t, std::priority_queue< adb_result_t, std::vector< adb_result_t >, T > *, adb_result_key_lt>::iterator it;
    for(it = queues->begin(); it != queues->end(); it++) {
      delete (*it).second;
    }
    delete queues;
  }
  if(set) {
    delete set;
  }
}

template <class T> void PerTrackAccumulator<T>::add_point(adb_result_t *r) {
  if(!isnan(r->dist)) {
    if(set->find(*r) == set->end()) {
      set->insert(*r);

      typename std::map< adb_result_t, std::priority_queue< adb_result_t, std::vector< adb_result_t >, T > *, adb_result_key_lt>::iterator it;
      std::priority_queue< adb_result_t, std::vector< adb_result_t >, T > *queue;
      it = queues->find(*r);
      if(it == queues->end()) {
        queue = new std::priority_queue< adb_result_t, std::vector< adb_result_t >, T >;
        (*queues)[*r] = queue;
      } else {
        queue = (*it).second;
      }

      queue->push(*r);
      if(queue->size() > pointNN) {
        queue->pop();
      }
    }
  }
}

template <class T> adb_query_results_t *PerTrackAccumulator<T>::get_points() {
  typename std::map< adb_result_t, std::vector< adb_result_t >, adb_result_key_lt> points;
  typename std::priority_queue< adb_result_t, std::vector< adb_result_t >, T> queue;
  typename std::map< adb_result_t, std::priority_queue< adb_result_t, std::vector< adb_result_t >, T > *, adb_result_key_lt>::iterator it;

  unsigned int size = 0;
  for(it = queues->begin(); it != queues->end(); it++) {
    unsigned int n = ((*it).second)->size();
    std::vector<adb_result_t> v;
    adb_result_t r;
    double dist = 0;
    for(unsigned int k = 0; k < n; k++) {
      r = ((*it).second)->top();
      dist += r.dist;
      v.push_back(r);
      ((*it).second)->pop();
    }
    points[r] = v;
    dist /= n;
    size += n;
    r.dist = dist;
    /* I will burn in hell */
    r.ipos = n;
    queue.push(r);
    if(queue.size() > trackNN) {
      size -= queue.top().ipos;
      queue.pop();
    }
  }

  adb_query_results_t *r = (adb_query_results_t *) malloc(sizeof(adb_query_results_t));
  adb_result_t *rs = (adb_result_t *) calloc(size, sizeof(adb_result_t));
  r->nresults = size;
  r->results = rs;
  
  unsigned int k = 0;
  while(queue.size() > 0) {
    std::vector<adb_result_t> v = points[queue.top()];
    queue.pop();
    while(v.size() > 0) {
      rs[k++] = v.back();
      v.pop_back();
    }
  }
  return r;
}