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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2005 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#ifndef INSTRUMENT_H
#define INSTRUMENT_H
#include "stdafx.h"
#include "common/scummsys.h"
class MidiChannel;
namespace Scumm {
class Serializer;
class Instrument;
class InstrumentInternal {
public:
virtual void saveOrLoad (Serializer *s) = 0;
virtual void send (MidiChannel *mc) = 0;
virtual void copy_to (Instrument *dest) = 0;
virtual bool is_valid() = 0;
virtual operator int() { return 255; }
};
class Instrument {
private:
byte _type;
InstrumentInternal *_instrument;
public:
enum {
itNone = 0,
itProgram = 1,
itAdlib = 2,
itRoland = 3
};
Instrument() : _type (0), _instrument (0) { }
~Instrument() { delete _instrument; }
static void nativeMT32 (bool native);
void clear();
void copy_to (Instrument *dest) { if (_instrument) _instrument->copy_to (dest); else dest->clear(); }
// FIXME: This is evil! We cast a pointer to an int. Besides not being
// portable to 64bit systems, it is unclear why this is needed.
// If the only reason is to supply a unique identifier of that
// instrument: there are better ways do do that.
// OTOH, maybe the code is simply wrong, and what is really meant
// here is to first dereference _instrument, then cast it? Like
// this: (int)*_instrument
// At least this would explain the otherwise unused operator int()
// supplied by class Instrument_Program.
// If that is the case, the operator int() should all be replaced by
// a proper method, like "get_something()"
operator int() { return (_instrument ? (int) _instrument : 255); }
void program (byte program, bool mt32);
void adlib (byte *instrument);
void roland (byte *instrument);
byte getType() { return _type; }
bool isValid() { return (_instrument ? _instrument->is_valid() : false); }
void saveOrLoad (Serializer *s);
void send (MidiChannel *mc) { if (_instrument) _instrument->send (mc); }
};
} // End of namespace Scumm
#endif
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