view retrieve.cpp @ 659:536cfa209e7f

Sampling enhancements

Allow specification of a key with -k for doing sampling between a single
datum and the rest of the database.  (The implementation is slightly
icky, as mentioned in the previous commit message; hopefully this
situation will not remain for too long).

While we're at it, allow -r/--resultlength as a synonym for --nsamples
(if --nsamples is not given) in order better to reflect the analogy
between querying and sampling.

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

int audiodb_retrieve_datum(adb_t *adb, const char *key, adb_datum_t *datum) {
  uint32_t index = audiodb_key_index(adb, key);
  if(index == (uint32_t) -1) {
    return 1;
  } else {
    return audiodb_track_id_datum(adb, index, datum);
  }
}

int audiodb_free_datum(adb_t *adb, adb_datum_t *datum) {
  return audiodb_really_free_datum(datum);
}