Alc/mixer_inc.c

   1 #include "config.h"
   2
   3 #include "alMain.h"
   4 #include "alSource.h"
   5 #include "mixer_defs.h"
   6
   7 #ifdef __GNUC__
   8 #define LIKELY(x) __builtin_expect(!!(x), 1)
   9 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
  10 #else
  11 #define LIKELY(x) (x)
  12 #define UNLIKELY(x) (x)
  13 #endif
  14
  15 #define REAL_MERGE2(a,b) a##b
  16 #define MERGE2(a,b) REAL_MERGE2(a,b)
  17
  18 #define MixDirect_Hrtf MERGE2(MixDirect_Hrtf_,SUFFIX)
  19
  20
  21 static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2],
  22                                      const ALuint irSize,
  23                                      ALfloat (*RESTRICT Coeffs)[2],
  24                                      ALfloat (*RESTRICT CoeffStep)[2],
  25                                      ALfloat left, ALfloat right);
  26 static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2],
  27                                  const ALuint irSize,
  28                                  ALfloat (*RESTRICT Coeffs)[2],
  29                                  ALfloat left, ALfloat right);
  30
  31
  32 void MixDirect_Hrtf(ALsource *Source, ALCdevice *Device, DirectParams *params,
  33   const ALfloat *RESTRICT data, ALuint srcchan,
  34   ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
  35 {
  36     ALfloat (*RESTRICT DryBuffer)[BUFFERSIZE] = Device->DryBuffer;
  37     ALfloat *RESTRICT ClickRemoval = Device->ClickRemoval;
  38     ALfloat *RESTRICT PendingClicks = Device->PendingClicks;
  39     const ALuint IrSize = GetHrtfIrSize(Device->Hrtf);
  40     const ALint *RESTRICT DelayStep = params->Hrtf.DelayStep;
  41     ALfloat (*RESTRICT CoeffStep)[2] = params->Hrtf.CoeffStep;
  42     ALfloat (*RESTRICT TargetCoeffs)[2] = params->Hrtf.Coeffs[srcchan];
  43     ALuint *RESTRICT TargetDelay = params->Hrtf.Delay[srcchan];
  44     ALfloat *RESTRICT History = Source->Hrtf.History[srcchan];
  45     ALfloat (*RESTRICT Values)[2] = Source->Hrtf.Values[srcchan];
  46     ALint Counter = maxu(Source->Hrtf.Counter, OutPos) - OutPos;
  47     ALuint Offset = Source->Hrtf.Offset + OutPos;
  48     ALIGN(16) ALfloat Coeffs[HRIR_LENGTH][2];
  49     ALuint Delay[2];
  50     ALfloat left, right;
  51     ALuint pos;
  52     ALuint c;
  53
  54     pos = 0;
  55     for(c = 0;c < IrSize;c++)
  56     {
  57         Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter);
  58         Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter);
  59     }
  60
  61     Delay[0] = TargetDelay[0] - (DelayStep[0]*Counter);
  62     Delay[1] = TargetDelay[1] - (DelayStep[1]*Counter);
  63
  64     if(LIKELY(OutPos == 0))
  65     {
  66         History[Offset&SRC_HISTORY_MASK] = data[pos];
  67         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  68                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  69                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  70         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  71                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  72                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  73
  74         ClickRemoval[FrontLeft]  -= Values[(Offset+1)&HRIR_MASK][0] +
  75                                     Coeffs[0][0] * left;
  76         ClickRemoval[FrontRight] -= Values[(Offset+1)&HRIR_MASK][1] +
  77                                     Coeffs[0][1] * right;
  78     }
  79     for(pos = 0;pos < BufferSize && Counter > 0;pos++)
  80     {
  81         History[Offset&SRC_HISTORY_MASK] = data[pos];
  82         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  83                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  84                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  85         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  86                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  87                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  88
  89         Delay[0] += DelayStep[0];
  90         Delay[1] += DelayStep[1];
  91
  92         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
  93         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
  94         Offset++;
  95
  96         ApplyCoeffsStep(Offset, Values, IrSize, Coeffs, CoeffStep, left, right);
  97         DryBuffer[FrontLeft][OutPos]  += Values[Offset&HRIR_MASK][0];
  98         DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
  99
 100         OutPos++;
 101         Counter--;
 102     }
 103
 104     Delay[0] >>= HRTFDELAY_BITS;
 105     Delay[1] >>= HRTFDELAY_BITS;
 106     for(;pos < BufferSize;pos++)
 107     {
 108         History[Offset&SRC_HISTORY_MASK] = data[pos];
 109         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 110         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 111
 112         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
 113         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
 114         Offset++;
 115
 116         ApplyCoeffs(Offset, Values, IrSize, Coeffs, left, right);
 117         DryBuffer[FrontLeft][OutPos]  += Values[Offset&HRIR_MASK][0];
 118         DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
 119
 120         OutPos++;
 121     }
 122     if(LIKELY(OutPos == SamplesToDo))
 123     {
 124         History[Offset&SRC_HISTORY_MASK] = data[pos];
 125         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 126         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 127
 128         PendingClicks[FrontLeft]  += Values[(Offset+1)&HRIR_MASK][0] +
 129                                      Coeffs[0][0] * left;
 130         PendingClicks[FrontRight] += Values[(Offset+1)&HRIR_MASK][1] +
 131                                      Coeffs[0][1] * right;
 132     }
 133 }
 134
 135
 136 #undef MixDirect_Hrtf
 137
 138 #undef MERGE2
 139 #undef REAL_MERGE2
 140
 141 #undef UNLIKELY
 142 #undef LIKELY