comparison audioDB-internals.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.

 #if !defined(WIN32)
 #include <sys/mman.h>
 #endif
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <sys/time.h>
 
 #include <stdio.h>
 #include <errno.h>
 #include <fcntl.h>
 #if defined(WIN32)

 #include <string.h>
 #include <unistd.h>
 #if defined(WIN32)
 #include <windows.h>
 #endif
+
+#include <gsl/gsl_rng.h>
 
 #include <algorithm>
 #include <iostream>
 #include <map>
 #include <queue>

   std::vector<std::string> *keys;
   std::map<std::string,uint32_t> *keymap;
   std::vector<uint32_t> *track_lengths;
   std::vector<off_t> *track_offsets;
   LSH *cached_lsh;
+  gsl_rng *rng;
 };
 
 typedef struct {
   bool operator() (const adb_result_t &r1, const adb_result_t &r2) {
     return strcmp(r1.ikey, r2.ikey) < 0;

 LSH *audiodb_index_allocate(adb_t *, char *, bool);
 vector<vector<float> > *audiodb_index_initialize_shingles(uint32_t, uint32_t, uint32_t);
 void audiodb_index_delete_shingles(vector<vector<float> > *);
 void audiodb_index_make_shingle(vector<vector<float> > *, uint32_t, double *, uint32_t, uint32_t);
 int audiodb_index_norm_shingles(vector<vector<float> > *, double *, double *, uint32_t, uint32_t, double, bool, bool, float);
+int audiodb_sample_loop(adb_t *, const adb_query_spec_t *, adb_qstate_internal_t *);
 
 #define ADB_MAXSTR (512U)
 #define ADB_FILETABLE_ENTRY_SIZE (256U)
 #define ADB_TRACKTABLE_ENTRY_SIZE (sizeof(uint32_t))
 #define ADB_DISTANCE_TOLERANCE (1e-6)