music_effect.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 ZVISION_MUSIC_NODE_H
#define ZVISION_MUSIC_NODE_H

#include "audio/mixer.h"
#include "zvision/scripting/scripting_effect.h"
#include "zvision/text/subtitles.h"

namespace Common {
class String;
}

namespace ZVision {

class MusicNodeBASE : public ScriptingEffect {
public:
    MusicNodeBASE(ZVision *engine, uint32 key, ScriptingEffectType type) : ScriptingEffect(engine, key, type) {}
    ~MusicNodeBASE() override {}

    bool process(uint32 deltaTimeInMillis) override = 0;

    virtual void setVolume(uint8 volume) = 0;
    virtual uint8 getVolume() = 0;
    virtual void setDeltaVolume(uint8 volume) = 0;
    virtual void setBalance(int8 balance) = 0;

    virtual void setFade(int32 time, uint8 target) = 0;
};

class MusicNode : public MusicNodeBASE {
public:
    MusicNode(ZVision *engine, uint32 key, Common::Path &file, bool loop, uint8 volume);
    ~MusicNode() override;

    bool process(uint32 deltaTimeInMillis) override;

    void setVolume(uint8 volume) override;
    uint8 getVolume() override;
    void setDeltaVolume(uint8 volume) override;
    void setBalance(int8 balance) override;

    void setFade(int32 time, uint8 target) override;

private:
    uint8 _volume;
    uint8 _deltaVolume;
    int8 _balance;
    bool _loop;
    bool _crossfade;
    uint8 _crossfadeTarget;
    int32 _crossfadeTime;
    bool _stereo;
    Audio::SoundHandle _handle;
    Subtitle *_sub;
    bool _loaded;
};

// Only used by Zork: Nemesis, for the flute and piano puzzles (tj4e and ve6f, as well as vr)
class MusicMidiNode : public MusicNodeBASE {
public:
    MusicMidiNode(ZVision *engine, uint32 key, int8 program, int8 note, int8 volume);
    ~MusicMidiNode() override;

    bool process(uint32 deltaTimeInMillis) override;

    void setVolume(uint8 volume) override;
    uint8 getVolume() override;
    void setDeltaVolume(uint8 volume) override;
    void setBalance(int8 balance) override;

    void setFade(int32 time, uint8 target) override;

private:
    int8 _chan;
    int8 _noteNumber;
    int8 _pan;
    int8 _volume;
    int8 _prog;
};

class PanTrackNode : public ScriptingEffect {
public:
    PanTrackNode(ZVision *engine, uint32 key, uint32 slot, int16 pos);
    ~PanTrackNode() override;

    bool process(uint32 deltaTimeInMillis) override;

private:
    uint32 _slot;
    int16 _position;
};

} // End of namespace ZVision

#endif