view libtests/0003/prog1.c @ 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.

#include "audioDB_API.h"
#include "test_utils_lib.h"

int main(int argc, char **argv) {
  adb_t *adb;

  clean_remove_db(TESTDB);
  if(!(adb = audiodb_create(TESTDB, 0, 0, 0)))
    return 1;
  if(audiodb_l2norm(adb))
    return 1;

  adb_datum_t datum = {1, 1, "testfeature", (double[1]) {1}, NULL, NULL};
  if(audiodb_insert_datum(adb, &datum))
    return 1;

  adb_query_id_t qid = {0};
  qid.datum = &datum;
  qid.sequence_length = 1;
  qid.sequence_start = 0;
  adb_query_parameters_t parms = 
    {ADB_ACCUMULATION_DB, ADB_DISTANCE_DOT_PRODUCT, 10, 0};
  adb_query_refine_t refine = {0};

  adb_query_spec_t spec;
  spec.qid = qid;
  spec.params = parms;
  spec.refine = refine;

  adb_query_results_t *results = audiodb_query_spec(adb, &spec);
  if(!results || results->nresults != 1) return 1;
  result_present_or_fail(results, "testfeature", 1, 0, 0);
  audiodb_query_free_results(adb, &spec, results);

  audiodb_close(adb);

  return 104;
}