furnace/src/engine/platform/dummy.h

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2022 tildearrow and contributors
*
* 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.
*/
#include "../dispatch.h"
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// the dummy platform outputs saw waves.
// used when a DivDispatch for a system is not found.
class DivPlatformDummy: public DivDispatch {
struct Channel {
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unsigned short freq, baseFreq;
short pitch;
unsigned short pos;
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bool active, freqChanged;
unsigned char vol;
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signed char amp;
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Channel(): freq(0), baseFreq(0), pitch(0), pos(0), active(false), freqChanged(false), vol(0), amp(64) {}
};
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Channel chan[128];
bool isMuted[128];
unsigned char chans;
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friend void putDispatchChan(void*,int,int);
public:
void acquire(short* bufL, short* bufR, size_t start, size_t len);
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void muteChannel(int ch, bool mute);
int dispatch(DivCommand c);
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void* getChanState(int chan);
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void reset();
void tick();
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int init(DivEngine* parent, int channels, int sugRate, unsigned int flags);
void quit();
~DivPlatformDummy();
};