towns_pc98_driver.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 TOWNS_PC98_AUDIODRIVER_H
#define TOWNS_PC98_AUDIODRIVER_H

#include "audio/softsynth/fmtowns_pc98/pc98_audio.h"

class TownsPC98_MusicChannel;
class TownsPC98_MusicChannelSSG;
class TownsPC98_SfxChannel;
#ifndef DISABLE_PC98_RHYTHM_CHANNEL
class TownsPC98_MusicChannelPCM;
#endif

class TownsPC98_AudioDriver : public PC98AudioPluginDriver {
friend class TownsPC98_MusicChannel;
friend class TownsPC98_MusicChannelSSG;
friend class TownsPC98_SfxChannel;
#ifndef DISABLE_PC98_RHYTHM_CHANNEL
friend class TownsPC98_MusicChannelPCM;
#endif
public:
    TownsPC98_AudioDriver(Audio::Mixer *mixer, EmuType type);
    ~TownsPC98_AudioDriver();

    void loadMusicData(uint8 *data, bool loadPaused = false);
    void loadSoundEffectData(uint8 *data, uint8 trackNum);
    bool init();
    void reset();

    void fadeStep();

    void pause();
    void cont();

    bool looping() const;
    bool musicPlaying() const;

    void setMusicVolume(int volume);
    void setSoundEffectVolume(int volume);

private:
    uint8 readReg(uint8 part, uint8 reg);
    void writeReg(uint8 part, uint8 reg, uint8 val);
    void preventRegisterWrite(bool prevent);

    void timerCallbackA();
    void timerCallbackB();

    void startSoundEffect();

    void setMusicTempo(uint8 tempo);
    void setSfxTempo(uint16 tempo);

    TownsPC98_MusicChannel **_channels;
    TownsPC98_MusicChannelSSG **_ssgChannels;
    TownsPC98_SfxChannel **_sfxChannels;
#ifndef DISABLE_PC98_RHYTHM_CHANNEL
    TownsPC98_MusicChannelPCM *_rhythmChannel;
#endif

    uint8 *_musicBuffer;
    uint8 *_sfxBuffer;
    const uint8 *_patchData;

    uint8 _updateChannelsFlag;
    uint8 _updateSSGFlag;
    uint8 _updateRhythmFlag;
    uint8 _updateSfxFlag;
    uint8 _finishedChannelsFlag;
    uint8 _finishedSSGFlag;
    uint8 _finishedRhythmFlag;
    uint8 _finishedSfxFlag;

    bool _musicPlaying;
    bool _sfxPlaying;
    uint8 _fading;
    uint8 _looping;
    uint32 _musicTickCounter;

    int _sfxOffs;
    uint8 *_sfxData;
    uint16 _sfxOffsets[2];

    uint8 *_trackPtr;
    bool _regWriteProtect;

    PC98AudioCore *_pc98a;

    const int _numChanFM;
    const int _numChanSSG;
    const int _numChanRHY;

    static const uint8 _channelPreset[36];
    static const uint8 _levelPresetFMTOWNS[24];
    static const uint8 _levelPresetPC98[24];
    const uint8 *_levelPresets;

    bool _ready;
};

#endif