/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, 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/>.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/
#ifndef plAudioSystem_h
#define plAudioSystem_h

#include "hsStlUtils.h"
#include "hsWindowHndl.h"
#include "hsTemplates.h"
#include "hsGeometry3.h"
#include "pnKeyedObject/hsKeyedObject.h"

#define DEFAULT_AUDIO_DEVICE_NAME "Generic Software"

typedef wchar_t WCHAR;

class plSound;
class plSoftSoundNode;
class plgAudioSys;
class plStatusLog;
class plEAXListenerMod;

typedef struct ALCdevice_struct ALCdevice;
typedef struct ALCcontext_struct ALCcontext;


class DeviceDescriptor
{
public:
    DeviceDescriptor(const char *name, hsBool supportsEAX):
    fDeviceName(name),
    fSupportsEAX(supportsEAX)
    {
    }
    const char *GetDeviceName() { return fDeviceName.c_str();}
    hsBool SupportsEAX() { return fSupportsEAX; }

private:
    std::string fDeviceName;
    hsBool fSupportsEAX;
};

class plAudioSystem : public hsKeyedObject
{
public:
    plAudioSystem();
    ~plAudioSystem();

    CLASSNAME_REGISTER( plAudioSystem );
    GETINTERFACE_ANY( plAudioSystem, hsKeyedObject );

    enum
    {
        kThreadSndRef = 0,
        kRefEAXRegion
    };

    hsBool  Init(hsWindowHndl hWnd);
    void    Shutdown();

    void    SetActive( hsBool b );
    
    void SetListenerPos(const hsPoint3 pos);
    void SetListenerVelocity(const hsVector3 vel);
    void SetListenerOrientation(const hsVector3 view, const hsVector3 up);
    void SetMaxNumberOfActiveSounds();      // sets the max number of active sounds based on the priority cutoff
    void SetDistanceModel(int i);
    
    virtual hsBool MsgReceive(plMessage* msg);
    double GetTime();
    
    void        NextDebugSound( void );
    hsPoint3    GetCurrListenerPos( void ) const { return fCurrListenerPos; }

    int         GetNumAudioDevices();
    const char *GetAudioDeviceName(int index);
    hsBool      SupportsEAX(const char *deviceName);

    void        SetFadeLength(float lengthSec);
    
protected:

    friend class plgAudioSys;

    ALCdevice *     fDevice;
    ALCcontext *    fContext;
    ALCdevice *     fCaptureDevice;
    
    plSoftSoundNode     *fSoftRegionSounds;
    plSoftSoundNode     *fActiveSofts;
    plStatusLog         *fDebugActiveSoundDisplay;

    static Int32        fMaxNumSounds, fNumSoundsSlop;      // max number of sounds the engine is allowed to audibly play. Different than fMaxNumSources. That is the max number of sounds the audio card can play
    plSoftSoundNode     *fCurrDebugSound;
    hsTArray<plKey>     fPendingRegisters;

    hsPoint3    fCurrListenerPos;//, fCommittedListenerPos;
    hsBool      fActive, fUsingEAX, fRestartOnDestruct, fWaitingForShutdown;
    __int64     fStartTime;

    hsTArray<hsKeyedObject *>       fMyRefs;
    hsTArray<plEAXListenerMod *>    fEAXRegions;

    hsPoint3            fLastPos;
    hsBool              fAvatarPosSet;      // used for listener stuff

    hsBool              fDisplayNumBuffers;
    
    std::vector<DeviceDescriptor> fDeviceList;      // list of openal device names

    double          fStartFade;
    float           fFadeLength;
    unsigned int    fMaxNumSources;     // max openal sources
    double          fLastUpdateTimeMs;

    void    RegisterSoftSound( const plKey soundKey );
    void    UnregisterSoftSound( const plKey soundKey );
    void    IUpdateSoftSounds( const hsPoint3 &newPosition );
    UInt32  IScaleVolume(float volume);
    void    IEnumerateDevices();

public:
    hsBool                          fListenerInit;
};

class plgAudioSys
{
public:
    enum ASChannel
    {
        kSoundFX,
        kAmbience,
        kBgndMusic,
        kGUI,
        kNPCVoice,
        kVoice,
        kNumChannels
    };

    enum DebugFlags
    {
        kDisableRightSelect = 0x00000001,
        kDisableLeftSelect  = 0x00000002
    };

    enum AudioMode
    {
        kDisabled,
        kSoftware,
        kHardware,
        kHardwarePlusEAX,
    };
    static void Init(hsWindowHndl hWnd);
    static hsBool Hardware() { return fUseHardware; }
    static void SetUseHardware(hsBool b);
    static void SetActive(hsBool b);
    static void SetMuted( hsBool b );
    static void EnableEAX( hsBool b );
    static hsBool Active() { return fInit; }
    static void Shutdown();
    static void Activate(hsBool b);
    static hsBool   IsMuted( void ) { return fMuted; }
    static hsWindowHndl hWnd() { return fWnd; }
    static plAudioSystem* Sys() { return fSys; }
    static void Restart( void );
    static hsBool   UsingEAX( void ) { return fSys->fUsingEAX; }

    static void NextDebugSound( void );

    static void     SetChannelVolume( ASChannel chan, hsScalar vol );
    static hsScalar GetChannelVolume( ASChannel chan );

    static void     Set2D3DBias( hsScalar bias );
    static hsScalar Get2D3Dbias();

    static void     SetGlobalFadeVolume( hsScalar vol );
    static hsScalar GetGlobalFadeVolume( void ) { return fGlobalFadeVolume; }

    static void     SetDebugFlag( UInt32 flag, hsBool set = true ) { if( set ) fDebugFlags |= flag; else fDebugFlags &= ~flag; }
    static hsBool   IsDebugFlagSet( UInt32 flag ) { return fDebugFlags & flag; }
    static void     ClearDebugFlags( void ) { fDebugFlags = 0; }

    static hsScalar GetStreamingBufferSize( void ) { return fStreamingBufferSize; }
    static void     SetStreamingBufferSize( hsScalar size ) { fStreamingBufferSize = size; }

    static UInt8    GetPriorityCutoff( void ) { return fPriorityCutoff; }
    static void     SetPriorityCutoff( UInt8 cut ) { fPriorityCutoff = cut;  if(fSys) fSys->SetMaxNumberOfActiveSounds(); }

    static hsBool   AreExtendedLogsEnabled( void ) { return fEnableExtendedLogs; }
    static void     EnableExtendedLogs( hsBool e ) { fEnableExtendedLogs = e; }

    static hsScalar GetStreamFromRAMCutoff( void ) { return fStreamFromRAMCutoff; }
    static void     SetStreamFromRAMCutoff( hsScalar c ) { fStreamFromRAMCutoff = c; }

    static void SetListenerPos(const hsPoint3 pos);
    static void SetListenerVelocity(const hsVector3 vel);
    static void SetListenerOrientation(const hsVector3 view, const hsVector3 up);

    static void ShowNumBuffers(hsBool b) { if(fSys) fSys->fDisplayNumBuffers = b; }

    static void SetAudioMode(AudioMode mode);
    static int GetAudioMode();
    static hsBool LogStreamingUpdates() { return fLogStreamingUpdates; }
    static void SetLogStreamingUpdates(hsBool logUpdates) { fLogStreamingUpdates = logUpdates; }
    static void SetDeviceName(const char *device, hsBool restart = false);
    static const char *GetDeviceName() { return fDeviceName.c_str(); }
    static int GetNumAudioDevices();
    static const char *GetAudioDeviceName(int index);
    static ALCdevice *GetCaptureDevice();
    static hsBool SupportsEAX(const char *deviceName);
    static void RegisterSoftSound( const plKey soundKey );
    static void UnregisterSoftSound( const plKey soundKey );

    static hsBool IsRestarting() {return fRestarting;}

private:
    friend class plAudioSystem;

    static plAudioSystem*       fSys;
    static hsBool               fInit;
    static hsBool               fActive;
    static hsBool               fMuted;
    static hsWindowHndl         fWnd;
    static hsBool               fUseHardware;
    static hsBool               fDelayedActivate;
    static hsScalar             fChannelVolumes[ kNumChannels ];
    static hsScalar             fGlobalFadeVolume;
    static UInt32               fDebugFlags;
    static hsBool               fEnableEAX;
    static hsScalar             fStreamingBufferSize;
    static UInt8                fPriorityCutoff;
    static hsBool               fEnableExtendedLogs;
    static hsScalar             fStreamFromRAMCutoff;
    static hsScalar             f2D3DBias;
    static hsBool               fLogStreamingUpdates;
    static std::string          fDeviceName;
    static hsBool               fRestarting;
    static hsBool               fMutedStateChange;

};

#endif //plAudioSystem_h