halestorm.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 AUDIO_MAC_HALESTORM_H
#define AUDIO_MAC_HALESTORM_H

#include "common/scummsys.h"

namespace Common {
    class SeekableReadStream;
}

namespace Audio {

class Mixer;

class HSSoundSystem;

class HalestormLoader {
public:
    virtual ~HalestormLoader() {}

    virtual Common::SeekableReadStream *getResource(uint16 id, uint32 type) = 0;
};

class HalestormDriver {
public:
    HalestormDriver(HalestormLoader *res, Audio::Mixer *mixer);
    ~HalestormDriver();

    enum InterpolationMode {
        kNone = 0,
        kSimple = 1,
        kTable = 2
    };

    // The original driver would generate 8-bit sound, which makes
    // sense, since most of the hardware had support for only that.
    // However, the internal quality of the intermediate pcm stream
    // (before the downsampling to 8-bit in the final pass) is a bit
    // higher (up to 12 bits, depending on the channel use). I have
    // added an "output16bit" option which will output the unmodified
    // intermediate data (but converting it from unsigned to signed).
    bool init(bool hiQuality, InterpolationMode imode, int numChanSfx, bool output16bit);

    void registerSamples(const uint16 *resList, bool registerOnly);
    void releaseSamples();
    int changeSystemVoices(int numChanMusicTotal, int numChanMusicPoly, int numChanSfx);

    void startSoundEffect(int id, int rate = 0);
    void enqueueSoundEffect(int id, int rate, int note);
    void stopSoundEffect(int id);
    void stopAllSoundEffects();

    enum HSCommands {
        kSongPlayOnce           = 0,
        kSongPlayLoop           = 1,
        kSongAbort              = 2,
        kSongIsPlaying          = 3,
        kSongFadeOut            = 10,
        kSongFadeIn             = 11,
        kSongFadeGetState       = 12,
        kSongFadeReset          = 13,
        kSetRateAndIntrplMode   = 14
    };

    int doCommand(int cmd, ...);

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

private:
    HSSoundSystem *_hs;
};

} // End of namespace Audio

#endif