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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
* $URL$
* $Id$
*/
#include "sound/fmopl.h"
#include "sound/softsynth/opl/dosbox.h"
#include "sound/softsynth/opl/mame.h"
#include "common/config-manager.h"
namespace OPL {
// Config implementation
enum OplEmulator {
kAuto = 0,
kMame = 1,
kDOSBox = 2
};
const Config::EmulatorDescription Config::_drivers[] = {
{ "auto", "<default>", kAuto, kFlagOpl2 | kFlagDualOpl2 | kFlagOpl3 },
{ "mame", "MAME OPL emulator", kMame, kFlagOpl2 },
#ifndef DISABLE_DOSBOX_OPL
{ "db", "DOSBox OPL emulator", kDOSBox, kFlagOpl2 | kFlagDualOpl2 | kFlagOpl3 },
#endif
{ 0, 0, 0, 0 }
};
Config::DriverId Config::parse(const Common::String &name) {
for (int i = 0; _drivers[i].name; ++i) {
if (name.equalsIgnoreCase(_drivers[i].name))
return _drivers[i].id;
}
return -1;
}
Config::DriverId Config::detect(OplType type) {
uint32 flags = 0;
switch (type) {
case kOpl2:
flags = kFlagOpl2;
break;
case kDualOpl2:
flags = kFlagDualOpl2;
break;
case kOpl3:
flags = kFlagOpl3;
break;
}
DriverId drv = parse(ConfMan.get("opl_driver"));
// When a valid driver is selected, check whether it supports
// the requested OPL chip.
if (drv != -1 && drv != kAuto) {
// If the chip is supported, just use the driver.
if ((flags & _drivers[drv].flags)) {
return drv;
} else {
// Else we will output a warning and just
// return that no valid driver is found.
warning("Your selected OPL driver \"%s\" does not support type %d emulation, which is requested by your game.", _drivers[drv].description, type);
return -1;
}
}
// Detect the first matching emulator
for (int i = 1; _drivers[i].name; ++i) {
if (_drivers[i].flags & flags) {
drv = _drivers[i].id;
break;
}
}
return drv;
}
OPL *Config::create(DriverId driver, OplType type) {
// On invalid driver selection, we try to do some fallback detection
if (driver == -1) {
warning("Invalid OPL driver selected, trying to detect a fallback emulator");
driver = kAuto;
}
// If autodetection is selected, we search for a matching
// driver.
if (driver == kAuto) {
driver = detect(type);
// No emulator for the specified OPL chip could
// be found, thus stop here.
if (driver == -1) {
warning("No OPL emulator available for type %d", type);
return 0;
}
}
switch (driver) {
case kMame:
if (type == kOpl2)
return new MAME::OPL();
else
warning("MAME OPL emulator only supports OPL2 emulation.");
return 0;
#ifndef DISABLE_DOSBOX_OPL
case kDOSBox:
return new DOSBox::OPL(type);
#endif
default:
warning("Unsupported OPL emulator %d", driver);
// TODO: Maybe we should add some dummy emulator too, which just outputs
// silence as sound?
return 0;
}
}
bool OPL::_hasInstance = false;
} // End of namespace OPL
void OPLDestroy(FM_OPL *OPL) {
delete OPL;
}
void OPLResetChip(FM_OPL *OPL) {
OPL->reset();
}
void OPLWrite(FM_OPL *OPL, int a, int v) {
OPL->write(a, v);
}
unsigned char OPLRead(FM_OPL *OPL, int a) {
return OPL->read(a);
}
void OPLWriteReg(FM_OPL *OPL, int r, int v) {
OPL->writeReg(r, v);
}
void YM3812UpdateOne(FM_OPL *OPL, int16 *buffer, int length) {
OPL->readBuffer(buffer, length);
}
FM_OPL *makeAdLibOPL(int rate) {
FM_OPL *opl = OPL::Config::create();
if (opl) {
if (!opl->init(rate)) {
delete opl;
opl = 0;
}
}
return opl;
}
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