chan_count.h

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/*
 * Copyright (C) 2006-2011 David Robillard <d@drobilla.net>
 * Copyright (C) 2008-2013 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2013-2015 John Emmas <john@creativepost.co.uk>
 * Copyright (C) 2016-2017 Robin Gareus <robin@gareus.org>
 *
 * 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; either version 2 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 for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#pragma once
 
#include <cassert>
#include <ostream>
 
#include "pbd/xml++.h"
#include "ardour/data_type.h"
 
namespace ARDOUR {
 
 
class LIBARDOUR_API ChanCount {
public:
        ChanCount(const XMLNode& node);
        ChanCount() { reset(); }
 
        ChanCount(DataType type, uint32_t count) {
                reset();
                set(type, count);
        }
 
        void reset() {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        _counts[*t] = 0;
                }
        }
 
        void     set(DataType t, uint32_t count) { assert(t != DataType::NIL); _counts[t] = count; }
 
        uint32_t get(DataType t) const { assert(t != DataType::NIL); return _counts[t]; }
 
        inline uint32_t n (DataType t) const { return _counts[t]; }
 
        inline uint32_t n_audio() const { return _counts[DataType::AUDIO]; }
 
        inline void set_audio(uint32_t a) { _counts[DataType::AUDIO] = a; }
 
        inline uint32_t n_midi()  const { return _counts[DataType::MIDI]; }
 
        inline void set_midi(uint32_t m) { _counts[DataType::MIDI] = m; }
 
        uint32_t n_total() const {
                uint32_t ret = 0;
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t)
                        ret += _counts[*t];
 
                return ret;
        }
 
        bool operator==(const ChanCount& other) const {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t)
                        if (_counts[*t] != other._counts[*t])
                                return false;
 
                return true;
        }
 
        bool operator!=(const ChanCount& other) const {
                return ! (*this == other);
        }
 
        bool operator<(const ChanCount& other) const {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        if (_counts[*t] > other._counts[*t]) {
                                return false;
                        }
                }
                return (*this != other);
        }
 
        bool operator<=(const ChanCount& other) const {
                return ( (*this < other) || (*this == other) );
        }
 
        bool operator>(const ChanCount& other) const {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        if (_counts[*t] < other._counts[*t]) {
                                return false;
                        }
                }
                return (*this != other);
        }
 
        bool operator>=(const ChanCount& other) const {
                return ( (*this > other) || (*this == other) );
        }
 
        ChanCount operator+(const ChanCount& other) const {
                ChanCount ret;
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        ret.set(*t, get(*t) + other.get(*t));
                }
                return ret;
        }
 
        ChanCount operator-(const ChanCount& other) const {
                ChanCount ret;
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        if (get(*t) < other.get(*t)) {
                                ret.set(*t, 0);
                        } else {
                                ret.set(*t, get(*t) - other.get(*t));
                        }
                }
                return ret;
        }
 
        ChanCount operator*(const unsigned int factor) const {
                ChanCount ret;
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        ret.set(*t, get(*t) * factor );
                }
                return ret;
        }
 
        ChanCount& operator-=(const ChanCount& other) {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        if (_counts[*t] < other._counts[*t]) {
                                _counts[*t] = 0;
                        } else {
                                _counts[*t] -= other._counts[*t];
                        }
                }
                return *this;
        }
 
        ChanCount& operator+=(const ChanCount& other) {
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        _counts[*t] += other._counts[*t];
                }
                return *this;
        }
 
        static ChanCount min(const ChanCount& a, const ChanCount& b) {
                ChanCount ret;
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        ret.set(*t, std::min(a.get(*t), b.get(*t)));
                }
                return ret;
        }
 
        static ChanCount max(const ChanCount& a, const ChanCount& b) {
                ChanCount ret;
                for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
                        ret.set(*t, std::max(a.get(*t), b.get(*t)));
                }
                return ret;
        }
 
        XMLNode* state(const std::string& name) const;
 
        static const ChanCount ZERO;
 
private:
        uint32_t _counts[DataType::num_types];
};
 
} // namespace ARDOUR
 
LIBARDOUR_API std::ostream& operator<<(std::ostream& o, const ARDOUR::ChanCount& c);