OpenAL32/Include/alu.h

   1 #ifndef _ALU_H_
   2 #define _ALU_H_
   3
   4 #include "AL/al.h"
   5 #include "AL/alc.h"
   6 #include "AL/alext.h"
   7
   8 #ifdef HAVE_FLOAT_H
   9 #include <float.h>
  10 #endif
  11
  12 #ifndef M_PI
  13 #define M_PI           3.14159265358979323846  /* pi */
  14 #define M_PI_2         1.57079632679489661923  /* pi/2 */
  15 #endif
  16
  17 #ifdef HAVE_SQRTF
  18 #define aluSqrt(x) ((ALfloat)sqrtf((float)(x)))
  19 #else
  20 #define aluSqrt(x) ((ALfloat)sqrt((double)(x)))
  21 #endif
  22
  23 #ifdef HAVE_ACOSF
  24 #define aluAcos(x) ((ALfloat)acosf((float)(x)))
  25 #else
  26 #define aluAcos(x) ((ALfloat)acos((double)(x)))
  27 #endif
  28
  29 #ifdef HAVE_ATANF
  30 #define aluAtan(x) ((ALfloat)atanf((float)(x)))
  31 #else
  32 #define aluAtan(x) ((ALfloat)atan((double)(x)))
  33 #endif
  34
  35 #ifdef HAVE_FABSF
  36 #define aluFabs(x) ((ALfloat)fabsf((float)(x)))
  37 #else
  38 #define aluFabs(x) ((ALfloat)fabs((double)(x)))
  39 #endif
  40
  41 // fixes for mingw32.
  42 #if defined(max) && !defined(__max)
  43 #define __max max
  44 #endif
  45 #if defined(min) && !defined(__min)
  46 #define __min min
  47 #endif
  48
  49 #ifdef __cplusplus
  50 extern "C" {
  51 #endif
  52
  53 enum {
  54     FRONT_LEFT = 0,
  55     FRONT_RIGHT,
  56     FRONT_CENTER,
  57     SIDE_LEFT,
  58     SIDE_RIGHT,
  59     BACK_LEFT,
  60     BACK_RIGHT,
  61     BACK_CENTER,
  62     LFE,
  63
  64     OUTPUTCHANNELS
  65 };
  66
  67 #define BUFFERSIZE 24000
  68
  69 extern ALboolean DuplicateStereo;
  70
  71 /* NOTE: The AL_FORMAT_REAR* enums aren't handled here be cause they're
  72  *       converted to AL_FORMAT_QUAD* when loaded */
  73 static __inline ALuint aluBytesFromFormat(ALenum format)
  74 {
  75     switch(format)
  76     {
  77         case AL_FORMAT_MONO8:
  78         case AL_FORMAT_STEREO8:
  79         case AL_FORMAT_QUAD8_LOKI:
  80         case AL_FORMAT_QUAD8:
  81         case AL_FORMAT_51CHN8:
  82         case AL_FORMAT_61CHN8:
  83         case AL_FORMAT_71CHN8:
  84             return 1;
  85
  86         case AL_FORMAT_MONO16:
  87         case AL_FORMAT_STEREO16:
  88         case AL_FORMAT_QUAD16_LOKI:
  89         case AL_FORMAT_QUAD16:
  90         case AL_FORMAT_51CHN16:
  91         case AL_FORMAT_61CHN16:
  92         case AL_FORMAT_71CHN16:
  93             return 2;
  94
  95         case AL_FORMAT_MONO_FLOAT32:
  96         case AL_FORMAT_STEREO_FLOAT32:
  97         case AL_FORMAT_QUAD32:
  98         case AL_FORMAT_51CHN32:
  99         case AL_FORMAT_61CHN32:
 100         case AL_FORMAT_71CHN32:
 101             return 4;
 102
 103         default:
 104             return 0;
 105     }
 106 }
 107 static __inline ALuint aluChannelsFromFormat(ALenum format)
 108 {
 109     switch(format)
 110     {
 111         case AL_FORMAT_MONO8:
 112         case AL_FORMAT_MONO16:
 113         case AL_FORMAT_MONO_FLOAT32:
 114             return 1;
 115
 116         case AL_FORMAT_STEREO8:
 117         case AL_FORMAT_STEREO16:
 118         case AL_FORMAT_STEREO_FLOAT32:
 119             return 2;
 120
 121         case AL_FORMAT_QUAD8_LOKI:
 122         case AL_FORMAT_QUAD16_LOKI:
 123         case AL_FORMAT_QUAD8:
 124         case AL_FORMAT_QUAD16:
 125         case AL_FORMAT_QUAD32:
 126             return 4;
 127
 128         case AL_FORMAT_51CHN8:
 129         case AL_FORMAT_51CHN16:
 130         case AL_FORMAT_51CHN32:
 131             return 6;
 132
 133         case AL_FORMAT_61CHN8:
 134         case AL_FORMAT_61CHN16:
 135         case AL_FORMAT_61CHN32:
 136             return 7;
 137
 138         case AL_FORMAT_71CHN8:
 139         case AL_FORMAT_71CHN16:
 140         case AL_FORMAT_71CHN32:
 141             return 8;
 142
 143         default:
 144             return 0;
 145     }
 146 }
 147
 148 ALvoid aluInitPanning(ALCcontext *Context);
 149 ALvoid aluMixData(ALCcontext *context,ALvoid *buffer,ALsizei size,ALenum format);
 150 ALvoid aluHandleDisconnect(ALCdevice *device);
 151
 152 #ifdef __cplusplus
 153 }
 154 #endif
 155
 156 #endif
 157