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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.
*/
#ifndef __ardour_chan_count_h__
#define __ardour_chan_count_h__
#include <cassert>
#include <ostream>
#include "pbd/xml++.h"
#include "ardour/data_type.h"
namespace ARDOUR {
/** A count of channels, possibly with many types.
*
* Operators are defined so this may safely be used as if it were a simple
* (single-typed) integer count of channels.
*/
class LIBARDOUR_API ChanCount {
public:
ChanCount(const XMLNode& node);
ChanCount() { reset(); }
/** Convenience constructor for making single-typed streams (mono, stereo, midi, etc)
* @param type data type
* @param count number of channels
*/
ChanCount(DataType type, uint32_t count) {
reset();
set(type, count);
}
/** zero count of all data types */
void reset() {
for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
_counts[*t] = 0;
}
}
/** set channel count for given type
* @param t data type
* @param count number of channels
*/
void set(DataType t, uint32_t count) { assert(t != DataType::NIL); _counts[t] = count; }
/** query channel count for given type
* @param t data type
* @returns channel count for given type
*/
uint32_t get(DataType t) const { assert(t != DataType::NIL); return _counts[t]; }
inline uint32_t n (DataType t) const { return _counts[t]; }
/** query number of audio channels
* @returns number of audio channels
*/
inline uint32_t n_audio() const { return _counts[DataType::AUDIO]; }
/** set number of audio channels
* @param a number of audio channels
*/
inline void set_audio(uint32_t a) { _counts[DataType::AUDIO] = a; }
/** query number of midi channels
* @returns number of midi channels
*/
inline uint32_t n_midi() const { return _counts[DataType::MIDI]; }
/** set number of audio channels
* @param m number of midi channels
*/
inline void set_midi(uint32_t m) { _counts[DataType::MIDI] = m; }
/** query total channel count of all data types
* @returns total channel count (audio + midi)
*/
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;
}
/** underflow safe subtraction */
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;
}
/** underflow safe subtraction */
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);
#endif // __ardour_chan_count_h__
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