mididrv_m_mt32.h

/* 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 NUVIE_SOUND_MIDIDRV_M_MT32_H
#define NUVIE_SOUND_MIDIDRV_M_MT32_H

#include "audio/mt32gm.h"

namespace Ultima {
namespace Nuvie {

// An assignment of a MIDI instrument to a MIDI output channel. M data channels
// using this instrument will be mapped to the specified MIDI channel.
struct MInstrumentAssignment {
    int8 midiChannel;
    uint8 midiInstrument;
};

class MidiDriver_M_MT32 : public MidiDriver_MT32GM {
protected:
    struct MChannelData {
        // The MIDI note currently played on this channel.
        int8 activeNote = -1;
        // The MIDI note velocity currently used on this channel.
        uint8 velocity = 0;
        // The MIDI note queued for playback on this channel.
        int8 queuedNote = -1;
    };

    // Converts M note values to MIDI notes.
    static const uint8 MIDI_NOTE_MAP[24];

public:
    MidiDriver_M_MT32();
    ~MidiDriver_M_MT32();

    using MidiDriver_MT32GM::open;
    int open(MidiDriver *driver, bool nativeMT32) override;

    using MidiDriver_MT32GM::send;
    void send(int8 source, uint32 b) override;
    void metaEvent(int8 source, byte type, byte *data, uint16 length) override;

    void setInstrumentAssignments(const MInstrumentAssignment *assignments);

    void stopAllNotes(bool stopSustainedNotes) override;

protected:
    void onTimer() override;

    MChannelData _mChannelData[9];
    // Mapping of M instrument numbers to MIDI output channels
    int8 _mInstrumentMidiChannels[16];
    // Mapping of M instrument numbers to MIDI instrument numbers
    uint8 _mInstrumentMapping[16];
};

} // End of namespace Nuvie
} // End of namespace Ultima

#endif