95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
#include "config.h"
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#include "alMain.h"
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#include "alSource.h"
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#include "hrtf.h"
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#include "mixer_defs.h"
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#include "align.h"
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#include "alu.h"
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#define MAX_UPDATE_SAMPLES 128
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static inline void ApplyCoeffs(ALsizei Offset, ALfloat (*restrict Values)[2],
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const ALsizei irSize,
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const ALfloat (*restrict Coeffs)[2],
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ALfloat left, ALfloat right);
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void MixHrtf(ALfloat *restrict LeftOut, ALfloat *restrict RightOut,
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const ALfloat *data, ALsizei Offset, ALsizei OutPos,
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const ALsizei IrSize, MixHrtfParams *hrtfparams, HrtfState *hrtfstate,
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ALsizei BufferSize)
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{
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const ALfloat (*Coeffs)[2] = ASSUME_ALIGNED(hrtfparams->Coeffs, 16);
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const ALsizei Delay[2] = { hrtfparams->Delay[0], hrtfparams->Delay[1] };
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ALfloat gainstep = hrtfparams->GainStep;
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ALfloat gain = hrtfparams->Gain;
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ALfloat left, right;
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ALsizei pos, i;
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for(pos = 0;pos < BufferSize;)
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{
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ALfloat out[MAX_UPDATE_SAMPLES][2];
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ALsizei todo = mini(BufferSize-pos, MAX_UPDATE_SAMPLES);
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for(i = 0;i < todo;i++)
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{
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hrtfstate->History[Offset&HRTF_HISTORY_MASK] = data[pos++];
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left = hrtfstate->History[(Offset-Delay[0])&HRTF_HISTORY_MASK];
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right = hrtfstate->History[(Offset-Delay[1])&HRTF_HISTORY_MASK];
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hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][0] = 0.0f;
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hrtfstate->Values[(Offset+IrSize)&HRIR_MASK][1] = 0.0f;
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Offset++;
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ApplyCoeffs(Offset, hrtfstate->Values, IrSize, Coeffs, left, right);
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out[i][0] = hrtfstate->Values[Offset&HRIR_MASK][0]*gain;
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out[i][1] = hrtfstate->Values[Offset&HRIR_MASK][1]*gain;
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gain += gainstep;
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}
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for(i = 0;i < todo;i++)
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LeftOut[OutPos+i] += out[i][0];
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for(i = 0;i < todo;i++)
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RightOut[OutPos+i] += out[i][1];
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OutPos += todo;
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}
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hrtfparams->Gain = gain;
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}
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void MixDirectHrtf(ALfloat *restrict LeftOut, ALfloat *restrict RightOut,
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const ALfloat *data, ALsizei Offset, const ALsizei IrSize,
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const ALfloat (*restrict Coeffs)[2], ALfloat (*restrict Values)[2],
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ALsizei BufferSize)
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{
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ALfloat out[MAX_UPDATE_SAMPLES][2];
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ALfloat insample;
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ALsizei pos, i;
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for(pos = 0;pos < BufferSize;)
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{
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ALsizei todo = mini(BufferSize-pos, MAX_UPDATE_SAMPLES);
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for(i = 0;i < todo;i++)
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{
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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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insample = *(data++);
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ApplyCoeffs(Offset, Values, IrSize, Coeffs, insample, insample);
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out[i][0] = Values[Offset&HRIR_MASK][0];
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out[i][1] = Values[Offset&HRIR_MASK][1];
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}
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for(i = 0;i < todo;i++)
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LeftOut[pos+i] += out[i][0];
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for(i = 0;i < todo;i++)
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RightOut[pos+i] += out[i][1];
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pos += todo;
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}
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}
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