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                                      const 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(const DirectParams *params, const ALfloat *RESTRICT data, ALuint srcchan,
  33   ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
  34 {
  35     ALfloat (*RESTRICT DryBuffer)[BUFFERSIZE] = params->OutBuffer;
  36     ALfloat *RESTRICT ClickRemoval = params->ClickRemoval;
  37     ALfloat *RESTRICT PendingClicks = params->PendingClicks;
  38     const ALuint IrSize = params->Hrtf.Params.IrSize;
  39     const ALint *RESTRICT DelayStep = params->Hrtf.Params.DelayStep;
  40     const ALfloat (*RESTRICT CoeffStep)[2] = params->Hrtf.Params.CoeffStep;
  41     const ALfloat (*RESTRICT TargetCoeffs)[2] = params->Hrtf.Params.Coeffs[srcchan];
  42     const ALuint *RESTRICT TargetDelay = params->Hrtf.Params.Delay[srcchan];
  43     ALfloat *RESTRICT History = params->Hrtf.State->History[srcchan];
  44     ALfloat (*RESTRICT Values)[2] = params->Hrtf.State->Values[srcchan];
  45     ALint Counter = maxu(params->Hrtf.State->Counter, OutPos) - OutPos;
  46     ALuint Offset = params->Hrtf.State->Offset + OutPos;
  47     ALIGN(16) ALfloat Coeffs[HRIR_LENGTH][2];
  48     ALuint Delay[2];
  49     ALfloat left, right;
  50     ALuint pos;
  51     ALuint c;
  52
  53     pos = 0;
  54     for(c = 0;c < IrSize;c++)
  55     {
  56         Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter);
  57         Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter);
  58     }
  59
  60     Delay[0] = TargetDelay[0] - (DelayStep[0]*Counter);
  61     Delay[1] = TargetDelay[1] - (DelayStep[1]*Counter);
  62
  63     if(LIKELY(OutPos == 0))
  64     {
  65         History[Offset&SRC_HISTORY_MASK] = data[pos];
  66         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  67                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  68                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  69         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  70                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  71                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  72
  73         ClickRemoval[FrontLeft]  -= Values[(Offset+1)&HRIR_MASK][0] +
  74                                     Coeffs[0][0] * left;
  75         ClickRemoval[FrontRight] -= Values[(Offset+1)&HRIR_MASK][1] +
  76                                     Coeffs[0][1] * right;
  77     }
  78     for(pos = 0;pos < BufferSize && Counter > 0;pos++)
  79     {
  80         History[Offset&SRC_HISTORY_MASK] = data[pos];
  81         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  82                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  83                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  84         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  85                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  86                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  87
  88         Delay[0] += DelayStep[0];
  89         Delay[1] += DelayStep[1];
  90
  91         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
  92         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
  93         Offset++;
  94
  95         ApplyCoeffsStep(Offset, Values, IrSize, Coeffs, CoeffStep, left, right);
  96         DryBuffer[FrontLeft][OutPos]  += Values[Offset&HRIR_MASK][0];
  97         DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
  98
  99         OutPos++;
 100         Counter--;
 101     }
 102
 103     Delay[0] >>= HRTFDELAY_BITS;
 104     Delay[1] >>= HRTFDELAY_BITS;
 105     for(;pos < BufferSize;pos++)
 106     {
 107         History[Offset&SRC_HISTORY_MASK] = data[pos];
 108         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 109         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 110
 111         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
 112         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
 113         Offset++;
 114
 115         ApplyCoeffs(Offset, Values, IrSize, Coeffs, left, right);
 116         DryBuffer[FrontLeft][OutPos]  += Values[Offset&HRIR_MASK][0];
 117         DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
 118
 119         OutPos++;
 120     }
 121     if(LIKELY(OutPos == SamplesToDo))
 122     {
 123         History[Offset&SRC_HISTORY_MASK] = data[pos];
 124         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 125         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 126
 127         PendingClicks[FrontLeft]  += Values[(Offset+1)&HRIR_MASK][0] +
 128                                      Coeffs[0][0] * left;
 129         PendingClicks[FrontRight] += Values[(Offset+1)&HRIR_MASK][1] +
 130                                      Coeffs[0][1] * right;
 131     }
 132 }
 133
 134
 135 #undef MixDirect_Hrtf
 136
 137 #undef MERGE2
 138 #undef REAL_MERGE2
 139
 140 #undef UNLIKELY
 141 #undef LIKELY