view pointpair.h @ 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.

// should probably be rewritten
class PointPair {
 public:
  uint32_t trackID;
  uint32_t qpos;
  uint32_t spos;
  PointPair(uint32_t a, uint32_t b, uint32_t c);
};

bool operator<(const PointPair& a, const PointPair& b);