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/* Copyright 2014-2016 Jan Huwald, Stephan Richter
This file is part of HRTC.
HRTC is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
HRTC 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 General Public
License for more details.
You should have received a copy of the GNU General Public License
along with this program (see file LICENSE). If not, see
<http://www.gnu.org/licenses/>. */
#pragma once
#include <assert.h>
#include <boost/integer.hpp>
using boost::int_t;
using boost::uint_t;
#include "common.hpp"
/// quantization
template<typename Real>
typename int_t<bitsizeof<Real>()>::least
quantize(Real v, Real quantum) {
return round(v / quantum);
}
template<typename Real>
Real quant2real(typename int_t<bitsizeof<Real>()>::least i, Real quantum) {
return i * quantum;
}
// Convert a signed integer into an unsigned by storing the sign in
// the least significant bit. This allows to efficiently store small
// negative quantities using the integer_encoding_library (which only
// deals well with small unsigned values).
uint32_t signed2unsigned(int32_t v) {
return (v >= 0) ? ((uint32_t( v ) << 1) | 0)
: ((uint32_t(abs(v)) << 1) | 1);
}
int32_t unsigned2signed(uint32_t v) {
return (v & 1) ? -(v >> 1)
: (v >> 1);
}
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