ambient_sounds.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 BLADERUNNER_AMBIENT_SOUNDS_H
#define BLADERUNNER_AMBIENT_SOUNDS_H
 
#include "bladerunner/bladerunner.h" // For BLADERUNNER_ORIGINAL_SETTINGS symbol
 
#include "audio/audiostream.h"
#include "audio/mixer.h"
 
#include "common/str.h"
 
namespace BladeRunner {
 
class BladeRunnerEngine;
class SaveFileReadStream;
class SaveFileWriteStream;
 
class AmbientSounds {
    static const int kNonLoopingSounds                     = 25;
    static const int kLoopingSounds                        = 3;
    static const Audio::Mixer::SoundType kAmbientSoundType = Audio::Mixer::kPlainSoundType;
 
    struct NonLoopingSound {
        bool           isActive;
        Common::String name;
        int32          hash;
        int            audioPlayerTrack;
        uint32         delayMin;          // milliseconds
        uint32         delayMax;          // milliseconds
        uint32         nextPlayTimeStart; // milliseconds
        uint32         nextPlayTimeDiff;  // milliseconds
        int            volumeMin;   // should be in [0, 100]
        int            volumeMax;   // should be in [0, 100]
        int            volume;      // should be in [0, 100] (calculated as a random value within [volumeMin, volumeMax]
        int            panStartMin; // should be in [-100, 100]
        int            panStartMax; // should be in [-100, 100]
        int            panEndMin;   // should be in [-100, 100], with "-101" being a special value for skipping pan (balance) adjustment
        int            panEndMax;   // should be in [-100, 100], with "-101" being a special value for skipping pan (balance) adjustment
        int            priority;    // should be in [0, 100]
        int32          soundType;   // new - not stored in saved games
    };
 
    struct LoopingSound {
        bool           isActive;
        Common::String name;
        int32          hash;
        int            audioPlayerTrack;
        int            volume; // should be in [0, 100]
        int            pan;    // should be in [-100, 100]
        int32          soundType; // new - not stored in saved games
    };
 
    BladeRunnerEngine *_vm;
 
    NonLoopingSound *_nonLoopingSounds;
    LoopingSound    *_loopingSounds;
    int              _ambientVolumeFactorOriginalEngine; // should be in [0, 100]
 
public:
    AmbientSounds(BladeRunnerEngine *vm);
    ~AmbientSounds();
 
    void addSound(int sfxId,
                  uint32 delayMinSeconds, uint32 delayMaxSeconds,
                  int volumeMin, int volumeMax,
                  int panStartMin, int panStartMax,
                  int panEndMin, int panEndMax,
                  int priority, int unk);
    void removeNonLoopingSound(int sfxId, bool stopPlaying);
    void removeAllNonLoopingSounds(bool stopPlaying);
 
    void addSpeech(int actorId, int sentenceId,
                   uint32 delayMinSeconds, uint32 delayMaxSeconds,
                   int volumeMin, int volumeMax,
                   int panStartMin, int panStartMax,
                   int panEndMin, int panEndMax,
                   int priority, int unk);
    void playSound(int sfxId, int volume, int panStart, int panEnd, int priority, Audio::Mixer::SoundType type = kAmbientSoundType);
    void playSpeech(int actorId, int sentenceId, int volume, int panStart, int panEnd, int priority);
 
    void addLoopingSound(int sfxId, int volume, int pan, uint32 delaySeconds, Audio::Mixer::SoundType type = kAmbientSoundType);
    void adjustLoopingSound(int sfxId, int volume, int pan, uint32 delaySeconds);
    // it seems there is little confusion in original code about delay parameter,
    // sometimes it is used as boolean in same way as stopPlaying from non looping
    void removeLoopingSound(int sfxId, uint32 delaySeconds);
    void removeAllLoopingSounds(uint32 delaySeconds);
 
    void tick();
 
    void setVolume(int volume);
    int getVolume() const;
    void playSample();
 
    void save(SaveFileWriteStream &f);
    void load(SaveFileReadStream &f);
 
private:
    int findAvailableNonLoopingTrack() const;
    int findNonLoopingTrackByHash(int32 hash) const;
 
    int findAvailableLoopingTrack() const;
    int findLoopingTrackByHash(int32 hash) const;
 
    void addSoundByName(const Common::String &name,
                        uint32 delayMinSeconds, uint32 delayMaxSeconds,
                        int volumeMin, int volumeMax,
                        int panStartMin, int panStartMax,
                        int panEndMin, int panEndMax,
                        int priority, int unk);
 
    void removeNonLoopingSoundByIndex(int index, bool stopPlaying);
    void removeLoopingSoundByIndex(int index, uint32 delaySeconds);
};
 
} // End of namespace BladeRunner
 
#endif