77 lines
1.8 KiB
C++
77 lines
1.8 KiB
C++
/*
|
|
* Chromaprint -- Audio fingerprinting toolkit
|
|
* Copyright (C) 2010 Lukas Lalinsky <lalinsky@gmail.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
|
|
* USA
|
|
*/
|
|
|
|
#ifndef CHROMAPRINT_QUANTIZER_H_
|
|
#define CHROMAPRINT_QUANTIZER_H_
|
|
|
|
#include <assert.h>
|
|
#include <ostream>
|
|
|
|
namespace Chromaprint
|
|
{
|
|
|
|
class Quantizer
|
|
{
|
|
public:
|
|
Quantizer(double t0 = 0.0, double t1 = 0.0, double t2 = 0.0)
|
|
: m_t0(t0), m_t1(t1), m_t2(t2)
|
|
{
|
|
assert(t0 <= t1 && t1 <= t2);
|
|
}
|
|
|
|
int Quantize(double value) const
|
|
{
|
|
if (value < m_t1) {
|
|
if (value < m_t0) {
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
else {
|
|
if (value < m_t2) {
|
|
return 2;
|
|
}
|
|
return 3;
|
|
}
|
|
}
|
|
|
|
double t0() const { return m_t0; }
|
|
void set_t0(double t) { m_t0 = t; }
|
|
|
|
double t1() const { return m_t1; }
|
|
void set_t1(double t) { m_t1 = t; }
|
|
|
|
double t2() const { return m_t2; }
|
|
void set_t2(double t) { m_t2 = t; }
|
|
|
|
private:
|
|
double m_t0, m_t1, m_t2;
|
|
};
|
|
|
|
inline std::ostream &operator<<(std::ostream &stream, const Quantizer &q)
|
|
{
|
|
stream << "Quantizer(" << q.t0() << ", " << q.t1() << ", " << q.t2() << ")";
|
|
return stream;
|
|
}
|
|
|
|
};
|
|
|
|
#endif
|