annotate libtests/0003/prog1.c @ 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_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};
  refine.hopsize = 1;

  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;
}