view accumulator_test.cpp @ 580:633614461994

API for retrieving a track's data.

A new function, audiodb_retrieve_datum() fills a provided adb_datum_t
structure with the data corresponding to a given database key; the
companion audiodb_free_datum() function frees the data in a given datum
appropriately.

Just in case, I continue to require passing in the adb_t * as the first
argument to audiodb_free_datum(), even though it's not currently used:
I couldn't convince myself that _all_ possible implementations could
free a datum without reference to the adb_t.

This meant rewriting the internal code to use a new internal
audiodb_really_free_datum() function, which audiodb_free_datum() also
calls.

Sanity-checked by implementing a binding in sb-alien to this function,
lightly-tested.

All this fixes ticket:20 in Trac.

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

#include "accumulators.h"

static NearestAccumulator<adb_result_dist_lt> *foo = new NearestAccumulator<adb_result_dist_lt>();

int main() {
  adb_result_t r;
  r.key = "hello";
  r.ipos = 0;
  r.qpos = 0;
  r.dist = 3;
  foo->add_point(&r);
  r.ipos = 1;
  r.dist = 2;
  foo->add_point(&r);
  r.qpos = 1;
  foo->add_point(&r);

  adb_query_results_t *rs;
  rs = foo->get_points();
  for (unsigned int k = 0; k < rs->nresults; k++) {
    r = rs->results[k];
    printf("%s: %f %u %u\n", r.key, r.dist, r.qpos, r.ipos);
  }
  free(rs->results);
  free(rs);
  delete foo;
  return 1;
}