mirror of https://github.com/f4exb/sdrangel.git
96 lines
4.7 KiB
C++
96 lines
4.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2018 F4EXB //
|
|
// written by Edouard Griffiths //
|
|
// //
|
|
// This program 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 as version 3 of the License, or //
|
|
// (at your option) any later version. //
|
|
// //
|
|
// This program 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 V3 for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
|
|
///////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef SDRBASE_UTIL_FIXEDTRAITS_H_
|
|
#define SDRBASE_UTIL_FIXEDTRAITS_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "export.h"
|
|
|
|
template<uint32_t IntBits>
|
|
class FixedTraits
|
|
{
|
|
};
|
|
|
|
template<>
|
|
struct SDRBASE_API FixedTraits<28>
|
|
{
|
|
static const uint32_t fixed_resolution_shift = 28; //!< 1.0 representation. 28 is the highest power of two that can represent 9.99999... safely on 64 bits internally
|
|
static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
|
|
static const int32_t max_power = 63 - fixed_resolution_shift;
|
|
static const int64_t internal_pi = 0x3243f6a8;
|
|
static const int64_t internal_two_pi = 0x6487ed51;
|
|
static const int64_t internal_half_pi = 0x1921fb54;
|
|
static const int64_t internal_quarter_pi = 0xc90fdaa;
|
|
static const int64_t log_two_power_n_reversed[35]; // 35 = 63 - 28
|
|
static const int64_t log_one_plus_two_power_minus_n[28];
|
|
static const int64_t log_one_over_one_minus_two_power_minus_n[28];
|
|
static const int64_t arctantab[32];
|
|
};
|
|
|
|
template<>
|
|
struct SDRBASE_API FixedTraits<16>
|
|
{
|
|
static const uint32_t fixed_resolution_shift = 16;
|
|
static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
|
|
static const int32_t max_power = 63 - fixed_resolution_shift;
|
|
static const int64_t internal_pi = 205887;
|
|
static const int64_t internal_two_pi = 411775;
|
|
static const int64_t internal_half_pi = 102944;
|
|
static const int64_t internal_quarter_pi = 51472;
|
|
static const int64_t log_two_power_n_reversed[47]; // 47 = 63 - 16
|
|
static const int64_t log_one_plus_two_power_minus_n[16];
|
|
static const int64_t log_one_over_one_minus_two_power_minus_n[16];
|
|
static const int64_t arctantab[32];
|
|
};
|
|
|
|
template<>
|
|
struct SDRBASE_API FixedTraits<23>
|
|
{
|
|
static const uint32_t fixed_resolution_shift = 23;
|
|
static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
|
|
static const int32_t max_power = 63 - fixed_resolution_shift;
|
|
static const int64_t internal_pi = 26353589;
|
|
static const int64_t internal_two_pi = 52707179;
|
|
static const int64_t internal_half_pi = 13176795;
|
|
static const int64_t internal_quarter_pi = 6588397;
|
|
static const int64_t log_two_power_n_reversed[40]; // 40 = 63 - 23
|
|
static const int64_t log_one_plus_two_power_minus_n[23];
|
|
static const int64_t log_one_over_one_minus_two_power_minus_n[23];
|
|
static const int64_t arctantab[32];
|
|
};
|
|
|
|
template<>
|
|
struct SDRBASE_API FixedTraits<24>
|
|
{
|
|
static const uint32_t fixed_resolution_shift = 24;
|
|
static const int64_t fixed_resolution = 1LL << fixed_resolution_shift;
|
|
static const int32_t max_power = 63 - fixed_resolution_shift;
|
|
static const int64_t internal_pi = 52707179;
|
|
static const int64_t internal_two_pi = 105414357;
|
|
static const int64_t internal_half_pi = 26353589;
|
|
static const int64_t internal_quarter_pi = 13176795;
|
|
static const int64_t log_two_power_n_reversed[39]; // 39 = 63 - 24
|
|
static const int64_t log_one_plus_two_power_minus_n[24];
|
|
static const int64_t log_one_over_one_minus_two_power_minus_n[24];
|
|
static const int64_t arctantab[32];
|
|
};
|
|
|
|
#endif /* SDRBASE_UTIL_FIXEDTRAITS_H_ */
|