//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//===========================================================================//

#ifndef ISOUNDSYSTEM_H
#define ISOUNDSYSTEM_H
#ifdef _WIN32
#pragma once
#endif

#include "appframework/iappsystem.h"

//-----------------------------------------------------------------------------
// Forward declarations
//-----------------------------------------------------------------------------
class IAudioDevice;
class CAudioSource;
class CAudioMixer;

//-----------------------------------------------------------------------------
// Sound handle
//-----------------------------------------------------------------------------
typedef unsigned short AudioSourceHandle_t;
enum { AUDIOSOURCEHANDLE_INVALID = (AudioSourceHandle_t)~0 };

//-----------------------------------------------------------------------------
// Flags for FindAudioSource
//-----------------------------------------------------------------------------
enum FindAudioSourceFlags_t {
    FINDAUDIOSOURCE_NODELAY = 0x1,
    FINDAUDIOSOURCE_PREFETCH = 0x2,
    FINDAUDIOSOURCE_PLAYONCE = 0x4,
};

//-----------------------------------------------------------------------------
// Purpose: DLL interface for low-level sound utilities
//-----------------------------------------------------------------------------
#define SOUNDSYSTEM_INTERFACE_VERSION "SoundSystem001"

abstract_class ISoundSystem : public IAppSystem {
   public:
    virtual void Update(float time) = 0;
    virtual void Flush(void) = 0;

    virtual CAudioSource *FindOrAddSound(const char *filename) = 0;
    virtual CAudioSource *LoadSound(const char *wavfile) = 0;

    virtual void PlaySound(CAudioSource * source, float volume,
                           CAudioMixer **ppMixer) = 0;

    virtual bool IsSoundPlaying(CAudioMixer * pMixer) = 0;
    virtual CAudioMixer *FindMixer(CAudioSource * source) = 0;

    virtual void StopAll(void) = 0;
    virtual void StopSound(CAudioMixer * mixer) = 0;
};

#endif  // ISOUNDSYSTEM_H