Alc/mixer_inc.c

   1 #include "config.h"
   2
   3 #include "alMain.h"
   4 #include "alSource.h"
   5
   6 #include "hrtf.h"
   7 #include "mixer_defs.h"
   8 #include "align.h"
   9
  10
  11 #define REAL_MERGE(a,b) a##b
  12 #define MERGE(a,b) REAL_MERGE(a,b)
  13
  14 #define MixHrtf MERGE(MixHrtf_,SUFFIX)
  15
  16
  17 static inline void ApplyCoeffs(ALuint Offset, ALfloat (*restrict Values)[2],
  18                                const ALuint irSize,
  19                                ALfloat (*restrict Coeffs)[2],
  20                                ALfloat left, ALfloat right);
  21
  22
  23 void MixHrtf(ALfloat (*restrict OutBuffer)[BUFFERSIZE], const ALfloat *data,
  24              ALuint Offset, const ALuint IrSize,
  25              const HrtfParams *hrtfparams, HrtfState *hrtfstate, ALuint BufferSize)
  26 {
  27     alignas(16) ALfloat Coeffs[HRIR_LENGTH][2];
  28     ALuint Delay[2];
  29     ALfloat left, right;
  30     ALuint pos;
  31     ALuint c;
  32
  33     for(c = 0;c < IrSize;c++)
  34     {
  35         Coeffs[c][0] = hrtfparams->Coeffs[c][0];
  36         Coeffs[c][1] = hrtfparams->Coeffs[c][1];
  37     }
  38     Delay[0] = hrtfparams->Delay[0];
  39     Delay[1] = hrtfparams->Delay[1];
  40
  41     for(pos = 0;pos < BufferSize;pos++)
  42     {
  43         hrtfstate->History[Offset&HRTF_HISTORY_MASK] = data[pos];
  44         left = hrtfstate->History[(Offset-Delay[0])&HRTF_HISTORY_MASK];
  45         right = hrtfstate->History[(Offset-Delay[1])&HRTF_HISTORY_MASK];
  46
  47         hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
  48         hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
  49         Offset++;
  50
  51         ApplyCoeffs(Offset, hrtfstate->Values, IrSize, Coeffs, left, right);
  52         OutBuffer[0][pos] += hrtfstate->Values[Offset&HRIR_MASK][0];
  53         OutBuffer[1][pos] += hrtfstate->Values[Offset&HRIR_MASK][1];
  54     }
  55 }
  56
  57
  58 #undef MixHrtf
  59
  60 #undef MERGE
  61 #undef REAL_MERGE