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Clustering_c.cpp
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD+Patents license found in the
* LICENSE file in the root directory of this source tree.
*/
// Copyright 2004-present Facebook. All Rights Reserved.
// -*- c++ -*-
#include "Clustering_c.h"
#include "Clustering.h"
#include "Index.h"
#include <vector>
#include "macros_impl.h"
extern "C" {
using faiss::Clustering;
using faiss::ClusteringParameters;
using faiss::Index;
DEFINE_GETTER(Clustering, int, niter)
DEFINE_GETTER(Clustering, int, nredo)
DEFINE_GETTER(Clustering, int, verbose)
DEFINE_GETTER(Clustering, int, spherical)
DEFINE_GETTER(Clustering, int, update_index)
DEFINE_GETTER(Clustering, int, frozen_centroids)
DEFINE_GETTER(Clustering, int, min_points_per_centroid)
DEFINE_GETTER(Clustering, int, max_points_per_centroid)
DEFINE_GETTER(Clustering, int, seed)
/// getter for d
DEFINE_GETTER(Clustering, size_t, d)
/// getter for k
DEFINE_GETTER(Clustering, size_t, k)
void faiss_ClusteringParameters_init(FaissClusteringParameters* params) {
ClusteringParameters d;
params->frozen_centroids = d.frozen_centroids;
params->max_points_per_centroid = d.max_points_per_centroid;
params->min_points_per_centroid = d.min_points_per_centroid;
params->niter = d.niter;
params->nredo = d.nredo;
params->seed = d.seed;
params->spherical = d.spherical;
params->update_index = d.update_index;
params->verbose = d.verbose;
}
// This conversion is required because the two types are not memory-compatible
inline ClusteringParameters from_faiss_c(const FaissClusteringParameters* params) {
ClusteringParameters o;
o.frozen_centroids = params->frozen_centroids;
o.max_points_per_centroid = params->max_points_per_centroid;
o.min_points_per_centroid = params->min_points_per_centroid;
o.niter = params->niter;
o.nredo = params->nredo;
o.seed = params->seed;
o.spherical = params->spherical;
o.update_index = params->update_index;
o.verbose = params->verbose;
return o;
}
/// getter for centroids (size = k * d)
void faiss_Clustering_centroids(
FaissClustering* clustering, float** centroids, size_t* size) {
std::vector<float>& v = reinterpret_cast<Clustering*>(clustering)->centroids;
if (centroids) {
*centroids = v.data();
}
if (size) {
*size = v.size();
}
}
/// getter for objective values (sum of distances reported by index)
/// over iterations
void faiss_Clustering_obj(
FaissClustering* clustering, float** obj, size_t* size) {
std::vector<float>& v = reinterpret_cast<Clustering*>(clustering)->obj;
if (obj) {
*obj = v.data();
}
if (size) {
*size = v.size();
}
}
/// the only mandatory parameters are k and d
int faiss_Clustering_new(FaissClustering** p_clustering, int d, int k) {
try {
Clustering* c = new Clustering(d, k);
*p_clustering = reinterpret_cast<FaissClustering*>(c);
return 0;
} CATCH_AND_HANDLE
}
int faiss_Clustering_new_with_params(
FaissClustering** p_clustering, int d, int k, const FaissClusteringParameters* cp) {
try {
Clustering* c = new Clustering(d, k, from_faiss_c(cp));
*p_clustering = reinterpret_cast<FaissClustering*>(c);
return 0;
} CATCH_AND_HANDLE
}
/// Index is used during the assignment stage
int faiss_Clustering_train(
FaissClustering* clustering, idx_t n, const float* x, FaissIndex* index) {
try {
reinterpret_cast<Clustering*>(clustering)->train(
n, x, *reinterpret_cast<Index*>(index));
return 0;
} CATCH_AND_HANDLE
}
void faiss_Clustering_free(FaissClustering* clustering) {
delete reinterpret_cast<Clustering*>(clustering);
}
int faiss_kmeans_clustering (size_t d, size_t n, size_t k,
const float *x,
float *centroids,
float *q_error) {
try {
float out = faiss::kmeans_clustering(d, n, k, x, centroids);
if (q_error) {
*q_error = out;
}
return 0;
} CATCH_AND_HANDLE
}
}
FaissClusteringParameters::nredo
int nredo
redo clustering this many times and keep best
Definition: Clustering_c.h:27
faiss::ClusteringParameters::niter
int niter
clustering iterations
Definition: Clustering.h:24
faiss::ClusteringParameters::nredo
int nredo
redo clustering this many times and keep best
Definition: Clustering.h:25
FaissClusteringParameters::spherical
int spherical
(bool) do we want normalized centroids?
Definition: Clustering_c.h:30
faiss::ClusteringParameters::seed
int seed
seed for the random number generator
Definition: Clustering.h:35
faiss::ClusteringParameters::frozen_centroids
bool frozen_centroids
use the centroids provided as input and do not change them during iterations
Definition: Clustering.h:30
FaissClusteringParameters
Definition: Clustering_c.h:25
FaissClusteringParameters::frozen_centroids
int frozen_centroids
(bool) use the centroids provided as input and do not change them during iterations ...
Definition: Clustering_c.h:32
FaissClusteringParameters::max_points_per_centroid
int max_points_per_centroid
to limit size of dataset
Definition: Clustering_c.h:35
faiss::ClusteringParameters::min_points_per_centroid
int min_points_per_centroid
otherwise you get a warning
Definition: Clustering.h:32
faiss::Clustering
Definition: Clustering.h:56
faiss::kmeans_clustering
float kmeans_clustering(size_t d, size_t n, size_t k, const float *x, float *centroids)
Definition: Clustering.cpp:238
FaissClusteringParameters::seed
int seed
seed for the random number generator
Definition: Clustering_c.h:37
faiss::ClusteringParameters::update_index
bool update_index
update index after each iteration?
Definition: Clustering.h:29
faiss::ClusteringParameters
Definition: Clustering.h:23
FaissClusteringParameters::niter
int niter
clustering iterations
Definition: Clustering_c.h:26
faiss::Index
Definition: Index.h:62
FaissClusteringParameters::update_index
int update_index
(bool) update index after each iteration?
Definition: Clustering_c.h:31
faiss::ClusteringParameters::spherical
bool spherical
do we want normalized centroids?
Definition: Clustering.h:28
FaissClusteringParameters::min_points_per_centroid
int min_points_per_centroid
otherwise you get a warning
Definition: Clustering_c.h:34
faiss::ClusteringParameters::max_points_per_centroid
int max_points_per_centroid
to limit size of dataset
Definition: Clustering.h:33
FaissClusteringParameters::verbose
int verbose
(bool)
Definition: Clustering_c.h:29