Alc/mixer_inc.c

   1 #include "config.h"
   2
   3 #include "AL/alc.h"
   4 #include "AL/al.h"
   5 #include "alMain.h"
   6 #include "alSource.h"
   7 #include "alAuxEffectSlot.h"
   8 #include "mixer_defs.h"
   9
  10 #ifdef __GNUC__
  11 #define LIKELY(x) __builtin_expect(!!(x), 1)
  12 #define UNLIKELY(x) __builtin_expect(!!(x), 0)
  13 #else
  14 #define LIKELY(x) (x)
  15 #define UNLIKELY(x) (x)
  16 #endif
  17
  18 #define REAL_MERGE2(a,b) a##b
  19 #define MERGE2(a,b) REAL_MERGE2(a,b)
  20
  21 #define MixDirect_Hrtf MERGE2(MixDirect_Hrtf_,SUFFIX)
  22 #define MixDirect MERGE2(MixDirect_,SUFFIX)
  23 #define MixSend MERGE2(MixSend_,SUFFIX)
  24
  25
  26 static __inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*RESTRICT Values)[2],
  27                                      const ALuint irSize,
  28                                      ALfloat (*RESTRICT Coeffs)[2],
  29                                      ALfloat (*RESTRICT CoeffStep)[2],
  30                                      ALfloat left, ALfloat right);
  31 static __inline void ApplyCoeffs(ALuint Offset, ALfloat (*RESTRICT Values)[2],
  32                                  const ALuint irSize,
  33                                  ALfloat (*RESTRICT Coeffs)[2],
  34                                  ALfloat left, ALfloat right);
  35
  36
  37 #ifndef NO_MIXDIRECT_HRTF
  38 void MixDirect_Hrtf(ALsource *Source, ALCdevice *Device, DirectParams *params,
  39   const ALfloat *RESTRICT data, ALuint srcchan,
  40   ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
  41 {
  42     const ALint *RESTRICT DelayStep = params->Hrtf.DelayStep;
  43     const ALuint IrSize = GetHrtfIrSize(Device->Hrtf);
  44     ALfloat (*RESTRICT DryBuffer)[MaxChannels];
  45     ALfloat *RESTRICT ClickRemoval, *RESTRICT PendingClicks;
  46     ALfloat (*RESTRICT CoeffStep)[2] = params->Hrtf.CoeffStep;
  47     ALfloat (*RESTRICT TargetCoeffs)[2] = params->Hrtf.Coeffs[srcchan];
  48     ALuint *RESTRICT TargetDelay = params->Hrtf.Delay[srcchan];
  49     ALfloat *RESTRICT History = Source->Hrtf.History[srcchan];
  50     ALfloat (*RESTRICT Values)[2] = Source->Hrtf.Values[srcchan];
  51     ALint Counter = maxu(Source->Hrtf.Counter, OutPos) - OutPos;
  52     ALuint Offset = Source->Hrtf.Offset + OutPos;
  53     ALIGN(16) ALfloat Coeffs[HRIR_LENGTH][2];
  54     ALuint Delay[2];
  55     ALfloat left, right;
  56     ALuint pos;
  57     ALuint c;
  58
  59     DryBuffer = Device->DryBuffer;
  60     ClickRemoval = Device->ClickRemoval;
  61     PendingClicks = Device->PendingClicks;
  62
  63     pos = 0;
  64     for(c = 0;c < IrSize;c++)
  65     {
  66         Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter);
  67         Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter);
  68     }
  69
  70     Delay[0] = TargetDelay[0] - (DelayStep[0]*Counter);
  71     Delay[1] = TargetDelay[1] - (DelayStep[1]*Counter);
  72
  73     if(LIKELY(OutPos == 0))
  74     {
  75         History[Offset&SRC_HISTORY_MASK] = data[pos];
  76         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  77                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  78                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  79         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  80                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  81                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  82
  83         ClickRemoval[FrontLeft]  -= Values[(Offset+1)&HRIR_MASK][0] +
  84                                     Coeffs[0][0] * left;
  85         ClickRemoval[FrontRight] -= Values[(Offset+1)&HRIR_MASK][1] +
  86                                     Coeffs[0][1] * right;
  87     }
  88     for(pos = 0;pos < BufferSize && Counter > 0;pos++)
  89     {
  90         History[Offset&SRC_HISTORY_MASK] = data[pos];
  91         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  92                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  93                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  94         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  95                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  96                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  97
  98         Delay[0] += DelayStep[0];
  99         Delay[1] += DelayStep[1];
 100
 101         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
 102         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
 103         Offset++;
 104
 105         ApplyCoeffsStep(Offset, Values, IrSize, Coeffs, CoeffStep, left, right);
 106         DryBuffer[OutPos][FrontLeft]  += Values[Offset&HRIR_MASK][0];
 107         DryBuffer[OutPos][FrontRight] += Values[Offset&HRIR_MASK][1];
 108
 109         OutPos++;
 110         Counter--;
 111     }
 112
 113     Delay[0] >>= HRTFDELAY_BITS;
 114     Delay[1] >>= HRTFDELAY_BITS;
 115     for(;pos < BufferSize;pos++)
 116     {
 117         History[Offset&SRC_HISTORY_MASK] = data[pos];
 118         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 119         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 120
 121         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
 122         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
 123         Offset++;
 124
 125         ApplyCoeffs(Offset, Values, IrSize, Coeffs, left, right);
 126         DryBuffer[OutPos][FrontLeft]  += Values[Offset&HRIR_MASK][0];
 127         DryBuffer[OutPos][FrontRight] += Values[Offset&HRIR_MASK][1];
 128
 129         OutPos++;
 130     }
 131     if(LIKELY(OutPos == SamplesToDo))
 132     {
 133         History[Offset&SRC_HISTORY_MASK] = data[pos];
 134         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 135         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 136
 137         PendingClicks[FrontLeft]  += Values[(Offset+1)&HRIR_MASK][0] +
 138                                      Coeffs[0][0] * left;
 139         PendingClicks[FrontRight] += Values[(Offset+1)&HRIR_MASK][1] +
 140                                      Coeffs[0][1] * right;
 141     }
 142 }
 143 #endif
 144
 145 #ifndef NO_MIXDIRECT
 146 void MixDirect(ALsource *Source, ALCdevice *Device, DirectParams *params,
 147   const ALfloat *RESTRICT data, ALuint srcchan,
 148   ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
 149 {
 150     ALfloat (*RESTRICT DryBuffer)[MaxChannels];
 151     ALfloat *RESTRICT ClickRemoval, *RESTRICT PendingClicks;
 152     ALIGN(16) ALfloat DrySend[MaxChannels];
 153     ALuint pos;
 154     ALuint c;
 155     (void)Source;
 156
 157     DryBuffer = Device->DryBuffer;
 158     ClickRemoval = Device->ClickRemoval;
 159     PendingClicks = Device->PendingClicks;
 160
 161     for(c = 0;c < MaxChannels;c++)
 162         DrySend[c] = params->Gains[srcchan][c];
 163
 164     pos = 0;
 165     if(OutPos == 0)
 166     {
 167         for(c = 0;c < MaxChannels;c++)
 168             ClickRemoval[c] -= data[pos]*DrySend[c];
 169     }
 170     for(pos = 0;pos < BufferSize;pos++)
 171     {
 172         for(c = 0;c < MaxChannels;c++)
 173             DryBuffer[OutPos][c] += data[pos]*DrySend[c];
 174         OutPos++;
 175     }
 176     if(OutPos == SamplesToDo)
 177     {
 178         for(c = 0;c < MaxChannels;c++)
 179             PendingClicks[c] += data[pos]*DrySend[c];
 180     }
 181 }
 182 #endif
 183
 184 #ifndef NO_MIXSEND
 185 void MixSend(SendParams *params, const ALfloat *RESTRICT data,
 186   ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
 187 {
 188     ALeffectslot *Slot;
 189     ALfloat  WetSend;
 190     ALfloat *WetBuffer;
 191     ALfloat *WetClickRemoval;
 192     ALfloat *WetPendingClicks;
 193     ALuint pos;
 194
 195     Slot = params->Slot;
 196     WetBuffer = Slot->WetBuffer;
 197     WetClickRemoval = Slot->ClickRemoval;
 198     WetPendingClicks = Slot->PendingClicks;
 199     WetSend = params->Gain;
 200
 201     pos = 0;
 202     if(OutPos == 0)
 203     {
 204         WetClickRemoval[0] -= data[pos] * WetSend;
 205     }
 206     for(pos = 0;pos < BufferSize;pos++)
 207     {
 208         WetBuffer[OutPos] += data[pos] * WetSend;
 209         OutPos++;
 210     }
 211     if(OutPos == SamplesToDo)
 212     {
 213         WetPendingClicks[0] += data[pos] * WetSend;
 214     }
 215 }
 216 #endif
 217
 218
 219 #undef MixSend
 220 #undef MixDirect
 221 #undef MixDirect_Hrtf
 222
 223 #undef MERGE2
 224 #undef REAL_MERGE2
 225
 226 #undef UNLIKELY
 227 #undef LIKELY