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engines/darkseed/adlib_dsf.h

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DARKSEED_ADLIB_DSF_H
+#define DARKSEED_ADLIB_DSF_H
+
+#include "audio/adlib_ms.h"
+
+namespace Darkseed {
+
+/**
+ * Implementation of the AdLib code used by Dark Seed (floppy version).
+ * The game uses a combination of the Creative FM-Music Functions library and
+ * its own sound code.
+ */
+class MidiDriver_DarkSeedFloppy_AdLib : public MidiDriver_ADLIB_Multisource {
+protected:
+	static const uint16 OPL_NOTE_FREQUENCIES[12];
+
+public:
+	MidiDriver_DarkSeedFloppy_AdLib(OPL::Config::OplType oplType, int timerFrequency = OPL::OPL::kDefaultCallbackFrequency);
+	~MidiDriver_DarkSeedFloppy_AdLib();
+
+	int open() override;
+
+	void deinitSource(uint8 source) override;
+
+	void setSourcePriority(uint8 source, uint8 priority);
+
+	void loadInstrumentBank(uint8 *instrumentBankData);
+
+protected:
+	uint8 allocateOplChannel(uint8 channel, uint8 source, InstrumentInfo &instrumentInfo) override;
+	uint16 calculateFrequency(uint8 channel, uint8 source, uint8 note) override;
+	uint8 calculateUnscaledVolume(uint8 channel, uint8 source, uint8 velocity, const OplInstrumentDefinition &instrumentDef, uint8 operatorNum) override;
+
+	uint8 _sourcePriority[MAXIMUM_SOURCES];
+	OplInstrumentDefinition *_dsfInstrumentBank;
+};
+
+} // namespace Darkseed
+
+#endif // DARKSEED_ADLIB_DSF_H