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     ALfloat (*RESTRICT DryBuffer)[BUFFERSIZE] = Device->DryBuffer;
  43     ALfloat *RESTRICT ClickRemoval = Device->ClickRemoval;
  44     ALfloat *RESTRICT PendingClicks = Device->PendingClicks;
  45     const ALuint IrSize = GetHrtfIrSize(Device->Hrtf);
  46     const ALint *RESTRICT DelayStep = params->Hrtf.DelayStep;
  47     ALfloat (*RESTRICT CoeffStep)[2] = params->Hrtf.CoeffStep;
  48     ALfloat (*RESTRICT TargetCoeffs)[2] = params->Hrtf.Coeffs[srcchan];
  49     ALuint *RESTRICT TargetDelay = params->Hrtf.Delay[srcchan];
  50     ALfloat *RESTRICT History = Source->Hrtf.History[srcchan];
  51     ALfloat (*RESTRICT Values)[2] = Source->Hrtf.Values[srcchan];
  52     ALint Counter = maxu(Source->Hrtf.Counter, OutPos) - OutPos;
  53     ALuint Offset = Source->Hrtf.Offset + OutPos;
  54     ALIGN(16) ALfloat Coeffs[HRIR_LENGTH][2];
  55     ALuint Delay[2];
  56     ALfloat left, right;
  57     ALuint pos;
  58     ALuint c;
  59
  60     pos = 0;
  61     for(c = 0;c < IrSize;c++)
  62     {
  63         Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter);
  64         Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter);
  65     }
  66
  67     Delay[0] = TargetDelay[0] - (DelayStep[0]*Counter);
  68     Delay[1] = TargetDelay[1] - (DelayStep[1]*Counter);
  69
  70     if(LIKELY(OutPos == 0))
  71     {
  72         History[Offset&SRC_HISTORY_MASK] = data[pos];
  73         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  74                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  75                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  76         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  77                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  78                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  79
  80         ClickRemoval[FrontLeft]  -= Values[(Offset+1)&HRIR_MASK][0] +
  81                                     Coeffs[0][0] * left;
  82         ClickRemoval[FrontRight] -= Values[(Offset+1)&HRIR_MASK][1] +
  83                                     Coeffs[0][1] * right;
  84     }
  85     for(pos = 0;pos < BufferSize && Counter > 0;pos++)
  86     {
  87         History[Offset&SRC_HISTORY_MASK] = data[pos];
  88         left  = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  89                      History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  90                      (Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  91         right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
  92                      History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
  93                      (Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
  94
  95         Delay[0] += DelayStep[0];
  96         Delay[1] += DelayStep[1];
  97
  98         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
  99         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
 100         Offset++;
 101
 102         ApplyCoeffsStep(Offset, Values, IrSize, Coeffs, CoeffStep, left, right);
 103         DryBuffer[FrontLeft][OutPos]  += Values[Offset&HRIR_MASK][0];
 104         DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
 105
 106         OutPos++;
 107         Counter--;
 108     }
 109
 110     Delay[0] >>= HRTFDELAY_BITS;
 111     Delay[1] >>= HRTFDELAY_BITS;
 112     for(;pos < BufferSize;pos++)
 113     {
 114         History[Offset&SRC_HISTORY_MASK] = data[pos];
 115         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 116         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 117
 118         Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
 119         Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
 120         Offset++;
 121
 122         ApplyCoeffs(Offset, Values, IrSize, Coeffs, left, right);
 123         DryBuffer[FrontLeft][OutPos]  += Values[Offset&HRIR_MASK][0];
 124         DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
 125
 126         OutPos++;
 127     }
 128     if(LIKELY(OutPos == SamplesToDo))
 129     {
 130         History[Offset&SRC_HISTORY_MASK] = data[pos];
 131         left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
 132         right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
 133
 134         PendingClicks[FrontLeft]  += Values[(Offset+1)&HRIR_MASK][0] +
 135                                      Coeffs[0][0] * left;
 136         PendingClicks[FrontRight] += Values[(Offset+1)&HRIR_MASK][1] +
 137                                      Coeffs[0][1] * right;
 138     }
 139 }
 140 #endif
 141
 142 #ifndef NO_MIXDIRECT
 143 void MixDirect(ALsource *Source, ALCdevice *Device, DirectParams *params,
 144   const ALfloat *RESTRICT data, ALuint srcchan,
 145   ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
 146 {
 147     ALfloat (*RESTRICT DryBuffer)[BUFFERSIZE] = Device->DryBuffer;
 148     ALfloat *RESTRICT ClickRemoval = Device->ClickRemoval;
 149     ALfloat *RESTRICT PendingClicks = Device->PendingClicks;
 150     ALfloat DrySend[MaxChannels];
 151     ALuint pos;
 152     ALuint c;
 153     (void)Source;
 154
 155     for(c = 0;c < MaxChannels;c++)
 156         DrySend[c] = params->Gains[srcchan][c];
 157
 158     pos = 0;
 159     if(OutPos == 0)
 160     {
 161         for(c = 0;c < MaxChannels;c++)
 162             ClickRemoval[c] -= data[pos]*DrySend[c];
 163     }
 164     for(c = 0;c < MaxChannels;c++)
 165     {
 166         for(pos = 0;pos < BufferSize;pos++)
 167             DryBuffer[c][OutPos+pos] += data[pos]*DrySend[c];
 168     }
 169     if(OutPos+pos == SamplesToDo)
 170     {
 171         for(c = 0;c < MaxChannels;c++)
 172             PendingClicks[c] += data[pos]*DrySend[c];
 173     }
 174 }
 175 #endif
 176
 177 #ifndef NO_MIXSEND
 178 void MixSend(SendParams *params, const ALfloat *RESTRICT data,
 179   ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
 180 {
 181     ALeffectslot *Slot = params->Slot;
 182     ALfloat *WetBuffer = Slot->WetBuffer;
 183     ALfloat *WetClickRemoval = Slot->ClickRemoval;
 184     ALfloat *WetPendingClicks = Slot->PendingClicks;
 185     ALfloat  WetSend = params->Gain;
 186     ALuint pos;
 187
 188     pos = 0;
 189     if(OutPos == 0)
 190     {
 191         WetClickRemoval[0] -= data[pos] * WetSend;
 192     }
 193     for(pos = 0;pos < BufferSize;pos++)
 194     {
 195         WetBuffer[OutPos] += data[pos] * WetSend;
 196         OutPos++;
 197     }
 198     if(OutPos == SamplesToDo)
 199     {
 200         WetPendingClicks[0] += data[pos] * WetSend;
 201     }
 202 }
 203 #endif
 204
 205
 206 #undef MixSend
 207 #undef MixDirect
 208 #undef MixDirect_Hrtf
 209
 210 #undef MERGE2
 211 #undef REAL_MERGE2
 212
 213 #undef UNLIKELY
 214 #undef LIKELY