142 lines
5.4 KiB
C
142 lines
5.4 KiB
C
#include "config.h"
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#include "alMain.h"
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#include "alSource.h"
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#include "mixer_defs.h"
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#ifdef __GNUC__
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#define LIKELY(x) __builtin_expect(!!(x), 1)
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#define UNLIKELY(x) __builtin_expect(!!(x), 0)
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#else
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#define LIKELY(x) (x)
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#define UNLIKELY(x) (x)
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#endif
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#define REAL_MERGE2(a,b) a##b
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#define MERGE2(a,b) REAL_MERGE2(a,b)
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#define MixDirect_Hrtf MERGE2(MixDirect_Hrtf_,SUFFIX)
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static inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*restrict Values)[2],
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const ALuint irSize,
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ALfloat (*restrict Coeffs)[2],
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const ALfloat (*restrict CoeffStep)[2],
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ALfloat left, ALfloat right);
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static inline void ApplyCoeffs(ALuint Offset, ALfloat (*restrict Values)[2],
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const ALuint irSize,
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ALfloat (*restrict Coeffs)[2],
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ALfloat left, ALfloat right);
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void MixDirect_Hrtf(const DirectParams *params, const ALfloat *restrict data, ALuint srcchan,
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ALuint OutPos, ALuint SamplesToDo, ALuint BufferSize)
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{
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ALfloat (*restrict DryBuffer)[BUFFERSIZE] = params->OutBuffer;
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ALfloat *restrict ClickRemoval = params->ClickRemoval;
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ALfloat *restrict PendingClicks = params->PendingClicks;
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const ALuint IrSize = params->Hrtf.Params.IrSize;
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const ALint *restrict DelayStep = params->Hrtf.Params.DelayStep;
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const ALfloat (*restrict CoeffStep)[2] = params->Hrtf.Params.CoeffStep;
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const ALfloat (*restrict TargetCoeffs)[2] = params->Hrtf.Params.Coeffs[srcchan];
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const ALuint *restrict TargetDelay = params->Hrtf.Params.Delay[srcchan];
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ALfloat *restrict History = params->Hrtf.State->History[srcchan];
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ALfloat (*restrict Values)[2] = params->Hrtf.State->Values[srcchan];
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ALint Counter = maxu(params->Hrtf.State->Counter, OutPos) - OutPos;
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ALuint Offset = params->Hrtf.State->Offset + OutPos;
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ALIGN(16) ALfloat Coeffs[HRIR_LENGTH][2];
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ALuint Delay[2];
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ALfloat left, right;
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ALuint pos;
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ALuint c;
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pos = 0;
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for(c = 0;c < IrSize;c++)
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{
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Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter);
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Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter);
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}
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Delay[0] = TargetDelay[0] - (DelayStep[0]*Counter);
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Delay[1] = TargetDelay[1] - (DelayStep[1]*Counter);
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if(LIKELY(OutPos == 0))
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{
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History[Offset&SRC_HISTORY_MASK] = data[pos];
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left = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
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History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
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(Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
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right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
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History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
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(Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
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ClickRemoval[FrontLeft] -= Values[(Offset+1)&HRIR_MASK][0] +
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Coeffs[0][0] * left;
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ClickRemoval[FrontRight] -= Values[(Offset+1)&HRIR_MASK][1] +
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Coeffs[0][1] * right;
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}
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for(pos = 0;pos < BufferSize && Counter > 0;pos++)
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{
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History[Offset&SRC_HISTORY_MASK] = data[pos];
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left = lerp(History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
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History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
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(Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
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right = lerp(History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&SRC_HISTORY_MASK],
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History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&SRC_HISTORY_MASK],
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(Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
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Delay[0] += DelayStep[0];
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Delay[1] += DelayStep[1];
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Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
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Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
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Offset++;
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ApplyCoeffsStep(Offset, Values, IrSize, Coeffs, CoeffStep, left, right);
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DryBuffer[FrontLeft][OutPos] += Values[Offset&HRIR_MASK][0];
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DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
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OutPos++;
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Counter--;
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}
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Delay[0] >>= HRTFDELAY_BITS;
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Delay[1] >>= HRTFDELAY_BITS;
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for(;pos < BufferSize;pos++)
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{
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History[Offset&SRC_HISTORY_MASK] = data[pos];
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left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
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right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
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Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
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Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
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Offset++;
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ApplyCoeffs(Offset, Values, IrSize, Coeffs, left, right);
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DryBuffer[FrontLeft][OutPos] += Values[Offset&HRIR_MASK][0];
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DryBuffer[FrontRight][OutPos] += Values[Offset&HRIR_MASK][1];
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OutPos++;
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}
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if(LIKELY(OutPos == SamplesToDo))
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{
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History[Offset&SRC_HISTORY_MASK] = data[pos];
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left = History[(Offset-Delay[0])&SRC_HISTORY_MASK];
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right = History[(Offset-Delay[1])&SRC_HISTORY_MASK];
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PendingClicks[FrontLeft] += Values[(Offset+1)&HRIR_MASK][0] +
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Coeffs[0][0] * left;
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PendingClicks[FrontRight] += Values[(Offset+1)&HRIR_MASK][1] +
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Coeffs[0][1] * right;
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}
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}
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#undef MixDirect_Hrtf
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#undef MERGE2
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#undef REAL_MERGE2
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#undef UNLIKELY
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#undef LIKELY
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