include/hrtfapoapi.idl

   1 /*
   2  * Copyright (C) 2023 Mohamad Al-Jaf
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  */
  18
  19 import "xapo.idl";
  20
  21 cpp_quote("#include <float.h>")
  22
  23 cpp_quote("#define HRTF_MAX_GAIN_LIMIT 12.0f")
  24 cpp_quote("#define HRTF_MIN_GAIN_LIMIT -96.0f")
  25 cpp_quote("#define HRTF_MIN_UNITY_GAIN_DISTANCE 0.05f")
  26 cpp_quote("#define HRTF_DEFAULT_UNITY_GAIN_DISTANCE 1.0f")
  27 cpp_quote("#define HRTF_DEFAULT_CUTOFF_DISTANCE FLT_MAX")
  28
  29 typedef struct HrtfPosition
  30 {
  31     float x;
  32     float y;
  33     float z;
  34 } HrtfPosition;
  35
  36 typedef struct HrtfOrientation
  37 {
  38     float element[9];
  39 } HrtfOrientation;
  40
  41 typedef enum HrtfDirectivityType
  42 {
  43     OmniDirectional,
  44     Cardioid,
  45     Cone,
  46 } HrtfDirectivityType;
  47
  48 typedef enum HrtfEnvironment
  49 {
  50     Small,
  51     Medium,
  52     Large,
  53     Outdoors,
  54 } HrtfEnvironment;
  55
  56 typedef struct HrtfDirectivity
  57 {
  58     HrtfDirectivityType type;
  59     float scaling;
  60 } HrtfDirectivity;
  61
  62 typedef struct HrtfDirectivityCardioid
  63 {
  64     HrtfDirectivity directivity;
  65     float order;
  66 } HrtfDirectivityCardioid;
  67
  68 typedef struct HrtfDirectivityCone
  69 {
  70     HrtfDirectivity directivity;
  71     float innerAngle;
  72     float outerAngle;
  73 } HrtfDirectivityCone;
  74
  75 typedef enum HrtfDistanceDecayType
  76 {
  77     NaturalDecay,
  78     CustomDecay,
  79 } HrtfDistanceDecayType;
  80
  81 typedef struct HrtfDistanceDecay
  82 {
  83     HrtfDistanceDecayType type;
  84     float maxGain;
  85     float minGain;
  86     float unityGainDistance;
  87     float cutoffDistance;
  88 } HrtfDistanceDecay;
  89
  90 typedef struct HrtfApoInit
  91 {
  92     HrtfDistanceDecay *distanceDecay;
  93     HrtfDirectivity *directivity;
  94 } HrtfApoInit;
  95
  96 HRESULT __stdcall CreateHrtfApo(const HrtfApoInit *init, IXAPO **xapo);
  97
  98 [
  99     object,
 100     uuid(15b3cd66-e9de-4464-b6e6-2bc3cf63d455)
 101 ]
 102 interface IXAPOHrtfParameters : IUnknown
 103 {
 104     HRESULT SetSourcePosition(const HrtfPosition *position);
 105     HRESULT SetSourceOrientation(const HrtfOrientation *orientation);
 106     HRESULT SetSourceGain(float gain);
 107     HRESULT SetEnvironment(HrtfEnvironment environment);
 108 }