sound.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.
 *
 * Additional copyright for this file:
 * Copyright (C) 1995-1997 Presto Studios, Inc.
 *
 * 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 PEGASUS_SOUND_H
#define PEGASUS_SOUND_H
 
#include "audio/mixer.h"
#include "common/str.h"
#include "pegasus/timers.h"
 
namespace Audio {
    class SeekableAudioStream;
}
 
namespace Pegasus {
 
class SoundFader;
 
// Things you might want to do with sound:
// - Start it
// - Stop it
// - Loop it
// - Pause it
// - Set the volume
// - Set the pitch (rate)
// - Pan the sound
// - Change these settings dynamically over time
 
class Sound {
public:
    Sound();
    ~Sound();
 
    // We only have one access point here because we should
    // only be opening an AIFF file from a file name. We're
    // not using the resource fork string resources.
    void initFromAIFFFile(const Common::Path &fileName);
 
    // Unlike the original game, we're going to use a regular
    // audio stream for sound spots. The original treated them
    // as movies.
    void initFromQuickTime(const Common::Path &fileName);
 
    void disposeSound();
    bool isSoundLoaded() const;
    void playSound();
    void loopSound();
    void playSoundSegment(uint32 start, uint32 end);
    void stopSound();
    void setVolume(const uint16 volume);
    bool isPlaying();
 
    void attachFader(SoundFader *fader);
 
protected:
    Audio::SeekableAudioStream *_stream;
    Audio::SoundHandle _handle;
    byte _volume;
 
    SoundFader *_fader;
};
 
// TODO: Make this class follow TimeBase better
// Right now it's just a loose wrapper to plug callbacks
// into sounds. Since this is only used for spot sounds,
// I'm not too worried about it right now as its usage
// is very limited.
// At the very least, the regular TimeBase functions for
// setting/getting should be neutered.
class SoundTimeBase : public Sound, public TimeBase {
public:
    SoundTimeBase();
    ~SoundTimeBase() override {}
 
    void playSoundSegment(uint32 start, uint32 end);
 
protected:
    void updateTime() override;
 
private:
    bool _setToStart;
};
 
} // End of namespace Pegasus
 
#endif