/*
* Descent 3 
* Copyright (C) 2024 Parallax Software
*
* 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/>.
*/

/******************************************************************
 *
 *  EAX.H - DirectSound3D Environmental Audio Extensions version 2.0
 *  Updated June 18, 1999
 *
 *******************************************************************
 */

#ifndef EAX2_H_INCLUDED
#define EAX2_H_INCLUDED

#include <dsound.h>

#ifdef __cplusplus
extern "C" {
#endif // __cplusplus

#pragma pack(push, 4)

/*
 EAX Wrapper Interface
*/
// {4FF53B81-1CE0-11d3-AAB8-00A0C95949D5}
DEFINE_GUID(CLSID_EAXDirectSound, 0x4ff53b81, 0x1ce0, 0x11d3, 0xaa, 0xb8, 0x0, 0xa0, 0xc9, 0x59, 0x49, 0xd5);

__declspec(dllimport) HRESULT WINAPI EAXDirectSoundCreate(GUID *, LPDIRECTSOUND *, IUnknown FAR *);

typedef HRESULT(FAR PASCAL *LPEAXDIRECTSOUNDCREATE)(GUID *, LPDIRECTSOUND *, IUnknown FAR *);

/*
 * EAX 2.0 listener property set {0306A6A8-B224-11d2-99E5-0000E8D8C722}
 */
DEFINE_GUID(DSPROPSETID_EAX20_ListenerProperties, 0x306a6a8, 0xb224, 0x11d2, 0x99, 0xe5, 0x0, 0x0, 0xe8, 0xd8, 0xc7,
            0x22);

// For compatibility with future EAX versions:
#define DSPROPSETID_EAX_ListenerProperties DSPROPSETID_EAX20_ListenerProperties

enum DSPROPERTY_EAX_LISTENERPROPERTY {
  DSPROPERTY_EAXLISTENER_NONE,
  DSPROPERTY_EAXLISTENER_ALLPARAMETERS,
  DSPROPERTY_EAXLISTENER_ROOM,
  DSPROPERTY_EAXLISTENER_ROOMHF,
  DSPROPERTY_EAXLISTENER_ROOMROLLOFFFACTOR,
  DSPROPERTY_EAXLISTENER_DECAYTIME,
  DSPROPERTY_EAXLISTENER_DECAYHFRATIO,
  DSPROPERTY_EAXLISTENER_REFLECTIONS,
  DSPROPERTY_EAXLISTENER_REFLECTIONSDELAY,
  DSPROPERTY_EAXLISTENER_REVERB,
  DSPROPERTY_EAXLISTENER_REVERBDELAY,
  DSPROPERTY_EAXLISTENER_ENVIRONMENT,
  DSPROPERTY_EAXLISTENER_ENVIRONMENTSIZE,
  DSPROPERTY_EAXLISTENER_ENVIRONMENTDIFFUSION,
  DSPROPERTY_EAXLISTENER_AIRABSORPTIONHF,
  DSPROPERTY_EAXLISTENER_FLAGS
};

// OR these flags with property id
#define DSPROPERTY_EAXLISTENER_IMMEDIATE 0x00000000 // changes take effect immediately
#define DSPROPERTY_EAXLISTENER_DEFERRED 0x80000000  // changes take effect later
#define DSPROPERTY_EAXLISTENER_COMMITDEFERREDSETTINGS (DSPROPERTY_EAXLISTENER_NONE | DSPROPERTY_EAXLISTENER_IMMEDIATE)

// Use this structure for DSPROPERTY_EAXLISTENER_ALLPARAMETERS
// - all levels are hundredths of decibels
// - all times are in seconds
// - the reference for high frequency controls is 5 kHz
//
// NOTE: This structure may change in future EAX versions.
//       It is recommended to initialize fields by name:
//              myListener.lRoom = -1000;
//              myListener.lRoomHF = -100;
//              ...
//              myListener.dwFlags = myFlags /* see EAXLISTENERFLAGS below */ ;
//       instead of:
//              myListener = { -1000, -100, ... , 0x00000009 };
//       If you want to save and load presets in binary form, you
//       should define your own structure to insure future compatibility.
//
struct EAXLISTENERPROPERTIES {
  LONG lRoom;                   // room effect level at low frequencies
  LONG lRoomHF;                 // room effect high-frequency level re. low frequency level
  FLOAT flRoomRolloffFactor;    // like DS3D flRolloffFactor but for room effect
  FLOAT flDecayTime;            // reverberation decay time at low frequencies
  FLOAT flDecayHFRatio;         // high-frequency to low-frequency decay time ratio
  LONG lReflections;            // early reflections level relative to room effect
  FLOAT flReflectionsDelay;     // initial reflection delay time
  LONG lReverb;                 // late reverberation level relative to room effect
  FLOAT flReverbDelay;          // late reverberation delay time relative to initial reflection
  DWORD dwEnvironment;          // sets all listener properties
  FLOAT flEnvironmentSize;      // environment size in meters
  FLOAT flEnvironmentDiffusion; // environment diffusion
  FLOAT flAirAbsorptionHF;      // change in level per meter at 5 kHz
  DWORD dwFlags;                // modifies the behavior of properties
};

// used by DSPROPERTY_EAXLISTENER_ENVIRONMENT
enum {
  EAX_ENVIRONMENT_GENERIC,
  EAX_ENVIRONMENT_PADDEDCELL,
  EAX_ENVIRONMENT_ROOM,
  EAX_ENVIRONMENT_BATHROOM,
  EAX_ENVIRONMENT_LIVINGROOM,
  EAX_ENVIRONMENT_STONEROOM,
  EAX_ENVIRONMENT_AUDITORIUM,
  EAX_ENVIRONMENT_CONCERTHALL,
  EAX_ENVIRONMENT_CAVE,
  EAX_ENVIRONMENT_ARENA,
  EAX_ENVIRONMENT_HANGAR,
  EAX_ENVIRONMENT_CARPETEDHALLWAY,
  EAX_ENVIRONMENT_HALLWAY,
  EAX_ENVIRONMENT_STONECORRIDOR,
  EAX_ENVIRONMENT_ALLEY,
  EAX_ENVIRONMENT_FOREST,
  EAX_ENVIRONMENT_CITY,
  EAX_ENVIRONMENT_MOUNTAINS,
  EAX_ENVIRONMENT_QUARRY,
  EAX_ENVIRONMENT_PLAIN,
  EAX_ENVIRONMENT_PARKINGLOT,
  EAX_ENVIRONMENT_SEWERPIPE,
  EAX_ENVIRONMENT_UNDERWATER,
  EAX_ENVIRONMENT_DRUGGED,
  EAX_ENVIRONMENT_DIZZY,
  EAX_ENVIRONMENT_PSYCHOTIC,

  EAX_ENVIRONMENT_COUNT
};

// Used by DSPROPERTY_EAXLISTENER_FLAGS
//
// Note: The number and order of flags may change in future EAX versions.
//       It is recommended to use the flag defines as follows:
//              myFlags = EAXLISTENERFLAGS_DECAYTIMESCALE | EAXLISTENERFLAGS_REVERBSCALE;
//       instead of:
//              myFlags = 0x00000009;
//
// These flags determine what properties are affected by environment size.
#define EAXLISTENERFLAGS_DECAYTIMESCALE 0x00000001        // reverberation decay time
#define EAXLISTENERFLAGS_REFLECTIONSSCALE 0x00000002      // reflection level
#define EAXLISTENERFLAGS_REFLECTIONSDELAYSCALE 0x00000004 // initial reflection delay time
#define EAXLISTENERFLAGS_REVERBSCALE 0x00000008           // reflections level
#define EAXLISTENERFLAGS_REVERBDELAYSCALE 0x00000010      // late reverberation delay time

// This flag limits high-frequency decay time according to air absorption.
#define EAXLISTENERFLAGS_DECAYHFLIMIT 0x00000020

#define EAXLISTENERFLAGS_RESERVED 0xFFFFFFC0 // reserved future use

// property ranges and defaults:

#define EAXLISTENER_MINROOM -10000
#define EAXLISTENER_MAXROOM 0
#define EAXLISTENER_DEFAULTROOM -1000

#define EAXLISTENER_MINROOMHF -10000
#define EAXLISTENER_MAXROOMHF 0
#define EAXLISTENER_DEFAULTROOMHF -100

#define EAXLISTENER_MINROOMROLLOFFFACTOR 0.0f
#define EAXLISTENER_MAXROOMROLLOFFFACTOR 10.0f
#define EAXLISTENER_DEFAULTROOMROLLOFFFACTOR 0.0f

#define EAXLISTENER_MINDECAYTIME 0.1f
#define EAXLISTENER_MAXDECAYTIME 20.0f
#define EAXLISTENER_DEFAULTDECAYTIME 1.49f

#define EAXLISTENER_MINDECAYHFRATIO 0.1f
#define EAXLISTENER_MAXDECAYHFRATIO 2.0f
#define EAXLISTENER_DEFAULTDECAYHFRATIO 0.83f

#define EAXLISTENER_MINREFLECTIONS -10000
#define EAXLISTENER_MAXREFLECTIONS 1000
#define EAXLISTENER_DEFAULTREFLECTIONS -2602

#define EAXLISTENER_MINREFLECTIONSDELAY 0.0f
#define EAXLISTENER_MAXREFLECTIONSDELAY 0.3f
#define EAXLISTENER_DEFAULTREFLECTIONSDELAY 0.007f

#define EAXLISTENER_MINREVERB -10000
#define EAXLISTENER_MAXREVERB 2000
#define EAXLISTENER_DEFAULTREVERB 200

#define EAXLISTENER_MINREVERBDELAY 0.0f
#define EAXLISTENER_MAXREVERBDELAY 0.1f
#define EAXLISTENER_DEFAULTREVERBDELAY 0.011f

#define EAXLISTENER_MINENVIRONMENT 0
#define EAXLISTENER_MAXENVIRONMENT (EAX_ENVIRONMENT_COUNT - 1)
#define EAXLISTENER_DEFAULTENVIRONMENT EAX_ENVIRONMENT_GENERIC

#define EAXLISTENER_MINENVIRONMENTSIZE 1.0f
#define EAXLISTENER_MAXENVIRONMENTSIZE 100.0f
#define EAXLISTENER_DEFAULTENVIRONMENTSIZE 7.5f

#define EAXLISTENER_MINENVIRONMENTDIFFUSION 0.0f
#define EAXLISTENER_MAXENVIRONMENTDIFFUSION 1.0f
#define EAXLISTENER_DEFAULTENVIRONMENTDIFFUSION 1.0f

#define EAXLISTENER_MINAIRABSORPTIONHF -100.0f
#define EAXLISTENER_MAXAIRABSORPTIONHF 0.0f
#define EAXLISTENER_DEFAULTAIRABSORPTIONHF -5.0f

#define EAXLISTENER_DEFAULTFLAGS                                                                                       \
  (EAXLISTENERFLAGS_DECAYTIMESCALE | EAXLISTENERFLAGS_REFLECTIONSSCALE | EAXLISTENERFLAGS_REFLECTIONSDELAYSCALE |      \
   EAXLISTENERFLAGS_REVERBSCALE | EAXLISTENERFLAGS_REVERBDELAYSCALE | EAXLISTENERFLAGS_DECAYHFLIMIT)

/*
 * EAX 2.0 buffer property set {0306A6A7-B224-11d2-99E5-0000E8D8C722}
 */
DEFINE_GUID(DSPROPSETID_EAX20_BufferProperties, 0x306a6a7, 0xb224, 0x11d2, 0x99, 0xe5, 0x0, 0x0, 0xe8, 0xd8, 0xc7,
            0x22);

// For compatibility with future EAX versions:
#define DSPROPSETID_EAX_BufferProperties DSPROPSETID_EAX20_BufferProperties

enum DSPROPERTY_EAX_BUFFERPROPERTY {
  DSPROPERTY_EAXBUFFER_NONE,
  DSPROPERTY_EAXBUFFER_ALLPARAMETERS,
  DSPROPERTY_EAXBUFFER_DIRECT,
  DSPROPERTY_EAXBUFFER_DIRECTHF,
  DSPROPERTY_EAXBUFFER_ROOM,
  DSPROPERTY_EAXBUFFER_ROOMHF,
  DSPROPERTY_EAXBUFFER_ROOMROLLOFFFACTOR,
  DSPROPERTY_EAXBUFFER_OBSTRUCTION,
  DSPROPERTY_EAXBUFFER_OBSTRUCTIONLFRATIO,
  DSPROPERTY_EAXBUFFER_OCCLUSION,
  DSPROPERTY_EAXBUFFER_OCCLUSIONLFRATIO,
  DSPROPERTY_EAXBUFFER_OCCLUSIONROOMRATIO,
  DSPROPERTY_EAXBUFFER_OUTSIDEVOLUMEHF,
  DSPROPERTY_EAXBUFFER_AIRABSORPTIONFACTOR,
  DSPROPERTY_EAXBUFFER_FLAGS
};

// OR these flags with property id
#define DSPROPERTY_EAXBUFFER_IMMEDIATE 0x00000000 // changes take effect immediately
#define DSPROPERTY_EAXBUFFER_DEFERRED 0x80000000  // changes take effect later
#define DSPROPERTY_EAXBUFFER_COMMITDEFERREDSETTINGS (DSPROPERTY_EAXBUFFER_NONE | DSPROPERTY_EAXBUFFER_IMMEDIATE)

// Use this structure for DSPROPERTY_EAXBUFFER_ALLPARAMETERS
// - all levels are hundredths of decibels
//
// NOTE: This structure may change in future EAX versions.
//       It is recommended to initialize fields by name:
//              myBuffer.lDirect = 0;
//              myBuffer.lDirectHF = -200;
//              ...
//              myBuffer.dwFlags = myFlags /* see EAXBUFFERFLAGS below */ ;
//       instead of:
//              myBuffer = { 0, -200, ... , 0x00000003 };
//
struct EAXBUFFERPROPERTIES {
  LONG lDirect;                // direct path level
  LONG lDirectHF;              // direct path level at high frequencies
  LONG lRoom;                  // room effect level
  LONG lRoomHF;                // room effect level at high frequencies
  FLOAT flRoomRolloffFactor;   // like DS3D flRolloffFactor but for room effect
  LONG lObstruction;           // main obstruction control (attenuation at high frequencies)
  FLOAT flObstructionLFRatio;  // obstruction low-frequency level re. main control
  LONG lOcclusion;             // main occlusion control (attenuation at high frequencies)
  FLOAT flOcclusionLFRatio;    // occlusion low-frequency level re. main control
  FLOAT flOcclusionRoomRatio;  // occlusion room effect level re. main control
  LONG lOutsideVolumeHF;       // outside sound cone level at high frequencies
  FLOAT flAirAbsorptionFactor; // multiplies DSPROPERTY_EAXLISTENER_AIRABSORPTIONHF
  DWORD dwFlags;               // modifies the behavior of properties
};

// Used by DSPROPERTY_EAXBUFFER_FLAGS
//    TRUE:    value is computed automatically - property is an offset
//    FALSE:   value is used directly
//
// Note: The number and order of flags may change in future EAX versions.
//       To insure future compatibility, use flag defines as follows:
//              myFlags = EAXBUFFERFLAGS_DIRECTHFAUTO | EAXBUFFERFLAGS_ROOMAUTO;
//       instead of:
//              myFlags = 0x00000003;
//
#define EAXBUFFERFLAGS_DIRECTHFAUTO 0x00000001 // affects DSPROPERTY_EAXBUFFER_DIRECTHF
#define EAXBUFFERFLAGS_ROOMAUTO 0x00000002     // affects DSPROPERTY_EAXBUFFER_ROOM
#define EAXBUFFERFLAGS_ROOMHFAUTO 0x00000004   // affects DSPROPERTY_EAXBUFFER_ROOMHF

#define EAXBUFFERFLAGS_RESERVED 0xFFFFFFF8 // reserved future use

// property ranges and defaults:

#define EAXBUFFER_MINDIRECT -10000
#define EAXBUFFER_MAXDIRECT 1000
#define EAXBUFFER_DEFAULTDIRECT 0

#define EAXBUFFER_MINDIRECTHF -10000
#define EAXBUFFER_MAXDIRECTHF 0
#define EAXBUFFER_DEFAULTDIRECTHF 0

#define EAXBUFFER_MINROOM -10000
#define EAXBUFFER_MAXROOM 1000
#define EAXBUFFER_DEFAULTROOM 0

#define EAXBUFFER_MINROOMHF -10000
#define EAXBUFFER_MAXROOMHF 0
#define EAXBUFFER_DEFAULTROOMHF 0

#define EAXBUFFER_MINROOMROLLOFFFACTOR 0.0f
#define EAXBUFFER_MAXROOMROLLOFFFACTOR 10.f
#define EAXBUFFER_DEFAULTROOMROLLOFFFACTOR 0.0f

#define EAXBUFFER_MINOBSTRUCTION -10000
#define EAXBUFFER_MAXOBSTRUCTION 0
#define EAXBUFFER_DEFAULTOBSTRUCTION 0

#define EAXBUFFER_MINOBSTRUCTIONLFRATIO 0.0f
#define EAXBUFFER_MAXOBSTRUCTIONLFRATIO 1.0f
#define EAXBUFFER_DEFAULTOBSTRUCTIONLFRATIO 0.0f

#define EAXBUFFER_MINOCCLUSION -10000
#define EAXBUFFER_MAXOCCLUSION 0
#define EAXBUFFER_DEFAULTOCCLUSION 0

#define EAXBUFFER_MINOCCLUSIONLFRATIO 0.0f
#define EAXBUFFER_MAXOCCLUSIONLFRATIO 1.0f
#define EAXBUFFER_DEFAULTOCCLUSIONLFRATIO 0.25f

#define EAXBUFFER_MINOCCLUSIONROOMRATIO 0.0f
#define EAXBUFFER_MAXOCCLUSIONROOMRATIO 10.0f
#define EAXBUFFER_DEFAULTOCCLUSIONROOMRATIO 0.5f

#define EAXBUFFER_MINOUTSIDEVOLUMEHF -10000
#define EAXBUFFER_MAXOUTSIDEVOLUMEHF 0
#define EAXBUFFER_DEFAULTOUTSIDEVOLUMEHF 0

#define EAXBUFFER_MINAIRABSORPTIONFACTOR 0.0f
#define EAXBUFFER_MAXAIRABSORPTIONFACTOR 10.0f
#define EAXBUFFER_DEFAULTAIRABSORPTIONFACTOR 1.0f

#define EAXBUFFER_DEFAULTFLAGS (EAXBUFFERFLAGS_DIRECTHFAUTO | EAXBUFFERFLAGS_ROOMAUTO | EAXBUFFERFLAGS_ROOMHFAUTO)

// Material transmission presets
// 3 values in this order:
//     1: occlusion (or obstruction)
//     2: occlusion LF Ratio (or obstruction LF Ratio)
//     3: occlusion Room Ratio

// Single window material preset
#define EAX_MATERIAL_SINGLEWINDOW -2800
#define EAX_MATERIAL_SINGLEWINDOWLF 0.71
#define EAX_MATERIAL_SINGLEWINDOWROOMRATIO 0.43

// Double window material preset
#define EAX_MATERIAL_DOUBLEWINDOW -5000
#define EAX_MATERIAL_DOUBLEWINDOWHF 0.40
#define EAX_MATERIAL_DOUBLEWINDOWROOMRATIO 0.24

// Thin door material preset
#define EAX_MATERIAL_THINDOOR -1800
#define EAX_MATERIAL_THINDOORLF 0.66
#define EAX_MATERIAL_THINDOORROOMRATIO 0.66

// Thick door material preset
#define EAX_MATERIAL_THICKDOOR -4400
#define EAX_MATERIAL_THICKDOORLF 0.64
#define EAX_MATERIAL_THICKDOORROOMRTATION 0.27

// Wood wall material preset
#define EAX_MATERIAL_WOODWALL -4000
#define EAX_MATERIAL_WOODWALLLF 0.50
#define EAX_MATERIAL_WOODWALLROOMRATIO 0.30

// Brick wall material preset
#define EAX_MATERIAL_BRICKWALL -5000
#define EAX_MATERIAL_BRICKWALLLF 0.60
#define EAX_MATERIAL_BRICKWALLROOMRATIO 0.24

// Stone wall material preset
#define EAX_MATERIAL_STONEWALL -6000
#define EAX_MATERIAL_STONEWALLLF 0.68
#define EAX_MATERIAL_STONEWALLROOMRATIO 0.20

// Curtain material preset
#define EAX_MATERIAL_CURTAIN -1200
#define EAX_MATERIAL_CURTAINLF 0.15
#define EAX_MATERIAL_CURTAINROOMRATIO 1.00

#pragma pack(pop)

#ifdef __cplusplus
}
#endif // __cplusplus

#endif