109 lines
2.3 KiB
C++
109 lines
2.3 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Fvoranklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __VOLUME_H__
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#define __VOLUME_H__
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#include <cstdint>
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class volume_t {
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public:
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constexpr volume_t operator-() const {
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return { -cb };
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}
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constexpr volume_t operator+(const volume_t& other) const {
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return { cb + other.cb };
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}
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constexpr volume_t operator-(const volume_t& other) const {
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return { cb - other.cb };
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}
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volume_t& operator+=(const volume_t& other) {
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cb += other.cb;
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return *this;
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}
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constexpr bool operator<(const volume_t& other) const {
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return cb < other.cb;
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}
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constexpr bool operator>(const volume_t& other) const {
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return cb > other.cb;
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}
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static constexpr volume_t centibel(const int cb) {
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return { cb };
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}
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static constexpr volume_t decibel(const int db) {
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return { db * 10 };
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}
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int32_t centibel() const {
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return cb;
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}
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int32_t decibel() const {
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return cb / 10;
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}
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private:
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int32_t cb;
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constexpr volume_t(
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const int cb
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) : cb(cb)
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{
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}
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};
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constexpr volume_t operator"" _cB(long double v) {
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return volume_t::centibel(v);
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}
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constexpr volume_t operator"" _dB(long double v) {
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return volume_t::centibel(v * 10);
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}
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struct volume_range_t {
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volume_t min;
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volume_t max;
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volume_t limit(const volume_t value) const {
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if( value < min ) {
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return min;
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}
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if( value > max ) {
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return max;
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}
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return value;
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}
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volume_t normalize(const volume_t value) const {
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/* Limit volume to specified range, and adjust minimum value to 0. */
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return limit(value) - min;
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}
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};
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#endif/*__VOLUME_H__*/
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