view pointpair.cpp @ 693:b1723ae7675e

begin work on sampling API

This is motivated by the need to be able to sample with arbitrary feature data
(e.g. from a feature file) against a database, for the JNMR "collections" paper
revisions or possible ISMIR paper revisions.  That bit doesn't work yet, but
the C-ified version of the current functionality (sample db x db and
sample key x db) works to the level of anecdotal tests.

The general approach is to mirror the _query_spec() API, where a whole heap
of knobs and twiddles are available to the user.  Unlike in the _query_spec()
API, not quite all of the knobs make sense (and even fewer are actually
implemented), but the basic idea is the same.

I pity the poor chump who will have to document all this.

extern "C" {
#include "audioDB_API.h"
}
#include "audioDB-internals.h"

PointPair::PointPair(uint32_t a, uint32_t b, uint32_t c) :
  trackID(a), qpos(b), spos(c) {
};

bool operator<(const PointPair& a, const PointPair& b) {
  return ((a.trackID < b.trackID) ||
          ((a.trackID == b.trackID) &&
           ((a.spos < b.spos) || ((a.spos == b.spos) && (a.qpos < b.qpos)))));
}

bool operator>(const PointPair& a, const PointPair& b) {
  return ((a.trackID > b.trackID) ||
          ((a.trackID == b.trackID) &&
           ((a.spos > b.spos) || ((a.spos == b.spos) && (a.qpos > b.qpos)))));
}

bool operator==(const PointPair& a, const PointPair& b) {
  return ((a.trackID == b.trackID) &&
          (a.qpos == b.qpos) &&
          (a.spos == b.spos));
}