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/* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef MOHAWK_RIVEN_SOUND_H
#define MOHAWK_RIVEN_SOUND_H
#include "common/array.h"
#include "common/str.h"
#include "audio/mixer.h"
namespace Audio {
class RewindableAudioStream;
}
namespace Mohawk {
class MohawkEngine;
class RivenSound;
/**
* Ambient sound list
*/
struct SLSTRecord {
uint16 index;
Common::Array<uint16> soundIds;
uint16 fadeFlags;
uint16 loop;
uint16 globalVolume;
uint16 u0;
uint16 suspend;
Common::Array<uint16> volumes;
Common::Array<int16> balances;
Common::Array<uint16> u2;
};
/**
* Sound manager for Riven
*
* The sound manager can play simulteaneously:
* - An effect sound
* - A list of ambient sounds
*
* The list of ambient sounds can be cross faded
* with the previously running ambient sounds.
*/
class RivenSoundManager {
public:
RivenSoundManager(MohawkEngine *vm);
~RivenSoundManager();
/**
* Play an effect sound
*
* @param id Sound ID in the stack
* @param volume Playback volume, between 0 and 255
* @param playOnDraw Start playing when the current card is drawn instead of immediatly
*/
void playSound(uint16 id, uint16 volume = 255, bool playOnDraw = false);
/** Start playing the scheduled on-draw effect sound, if any. Called by the GraphicsManager. */
void triggerDrawSound();
/** Stop playing the current effect sound, if any */
void stopSound();
/** Start playing an ambient sound list */
void playSLST(const SLSTRecord &slstRecord);
/** Start playing an ambient sound list from a resource */
void playSLST(uint16 index, uint16 card);
/** Stop playing the current ambient sounds */
void stopAllSLST(bool fade = false);
/** Update the ambient sounds for fading. Called once per frame. */
void updateSLST();
private:
struct AmbientSound {
RivenSound *sound;
uint16 targetVolume;
int16 targetBalance;
AmbientSound();
};
struct AmbientSoundList {
bool fading;
bool suspend;
Common::Array<AmbientSound> sounds;
AmbientSoundList();
};
enum FadeFlags {
kFadeOutPreviousSounds = 1,
kFadeInNewSounds = 2
};
MohawkEngine *_vm;
int16 _mainAmbientSoundId;
AmbientSoundList _ambientSounds;
AmbientSoundList _previousAmbientSounds;
uint32 _nextFadeUpdate;
RivenSound *_effect;
bool _effectPlayOnDraw;
Audio::RewindableAudioStream *makeAudioStream(uint16 id);
// Ambient sound management
void addAmbientSounds(const SLSTRecord &record);
void playAmbientSounds();
void pauseAmbientSounds();
void moveAmbientSoundsToPreviousSounds();
void freePreviousAmbientSounds();
// Ambient sound fading
void setTargetVolumes(const SLSTRecord &record);
void applyTargetVolumes();
void startFadingAmbientSounds(uint16 flags);
void fadeAmbientSoundList(AmbientSoundList &list);
bool fadeVolume(AmbientSound &ambientSound);
bool fadeBalance(AmbientSound &ambientSound);
void setAmbientLooping(bool loop);
};
/**
* A sound used internally by the SoundManager
*/
class RivenSound {
public:
RivenSound(MohawkEngine *vm, Audio::RewindableAudioStream *rewindStream);
~RivenSound();
/** Start playing the sound stream passed to the constructor */
void play();
/** Is the sound currently playing ar paused? */
bool isPlaying() const;
/** Pause the playback, the play method resumes */
void pause();
/** Get the current volume */
uint16 getVolume() const;
/** Change the playback volume */
void setVolume(uint16 volume);
/** Get the current balance */
int16 getBalance() const;
/** Change the balance */
void setBalance(int16 balance);
/** Set the sound to indefinitely loop. Must be called before startting the playback */
void setLooping(bool loop);
private:
static byte convertVolume(uint16 volume);
static int8 convertBalance(int16 balance);
MohawkEngine *_vm;
Audio::SoundHandle _handle;
Audio::RewindableAudioStream *_stream;
uint16 _volume;
int16 _balance;
bool _looping;
};
} // End of namespace Mohawk
#endif
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