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#include "config.h"
#include "alMain.h"
#include "alSource.h"
#include "hrtf.h"
#include "mixer_defs.h"
#include "align.h"
static inline void SetupCoeffs(ALfloat (*restrict OutCoeffs)[2],
const HrtfParams *hrtfparams,
ALuint IrSize, ALuint Counter);
static inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*restrict Values)[2],
const ALuint irSize,
ALfloat (*restrict Coeffs)[2],
const ALfloat (*restrict CoeffStep)[2],
ALfloat left, ALfloat right);
static inline void ApplyCoeffs(ALuint Offset, ALfloat (*restrict Values)[2],
const ALuint irSize,
ALfloat (*restrict Coeffs)[2],
ALfloat left, ALfloat right);
void MixHrtf(ALfloat (*restrict OutBuffer)[BUFFERSIZE], const ALfloat *data,
ALuint Counter, ALuint Offset, ALuint OutPos, const ALuint IrSize,
const HrtfParams *hrtfparams, HrtfState *hrtfstate, ALuint BufferSize)
{
alignas(16) ALfloat Coeffs[HRIR_LENGTH][2];
ALuint Delay[2];
ALfloat left, right;
ALuint pos;
SetupCoeffs(Coeffs, hrtfparams, IrSize, Counter);
Delay[0] = hrtfparams->Delay[0] - (hrtfparams->DelayStep[0]*Counter);
Delay[1] = hrtfparams->Delay[1] - (hrtfparams->DelayStep[1]*Counter);
pos = 0;
for(;pos < BufferSize && pos < Counter;pos++)
{
hrtfstate->History[Offset&HRTF_HISTORY_MASK] = data[pos];
left = lerp(hrtfstate->History[(Offset-(Delay[0]>>HRTFDELAY_BITS))&HRTF_HISTORY_MASK],
hrtfstate->History[(Offset-(Delay[0]>>HRTFDELAY_BITS)-1)&HRTF_HISTORY_MASK],
(Delay[0]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
right = lerp(hrtfstate->History[(Offset-(Delay[1]>>HRTFDELAY_BITS))&HRTF_HISTORY_MASK],
hrtfstate->History[(Offset-(Delay[1]>>HRTFDELAY_BITS)-1)&HRTF_HISTORY_MASK],
(Delay[1]&HRTFDELAY_MASK)*(1.0f/HRTFDELAY_FRACONE));
Delay[0] += hrtfparams->DelayStep[0];
Delay[1] += hrtfparams->DelayStep[1];
hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
Offset++;
ApplyCoeffsStep(Offset, hrtfstate->Values, IrSize, Coeffs, hrtfparams->CoeffStep, left, right);
OutBuffer[0][OutPos] += hrtfstate->Values[Offset&HRIR_MASK][0];
OutBuffer[1][OutPos] += hrtfstate->Values[Offset&HRIR_MASK][1];
OutPos++;
}
Delay[0] >>= HRTFDELAY_BITS;
Delay[1] >>= HRTFDELAY_BITS;
for(;pos < BufferSize;pos++)
{
hrtfstate->History[Offset&HRTF_HISTORY_MASK] = data[pos];
left = hrtfstate->History[(Offset-Delay[0])&HRTF_HISTORY_MASK];
right = hrtfstate->History[(Offset-Delay[1])&HRTF_HISTORY_MASK];
hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
Offset++;
ApplyCoeffs(Offset, hrtfstate->Values, IrSize, Coeffs, left, right);
OutBuffer[0][OutPos] += hrtfstate->Values[Offset&HRIR_MASK][0];
OutBuffer[1][OutPos] += hrtfstate->Values[Offset&HRIR_MASK][1];
OutPos++;
}
}
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