225 lines
7.6 KiB
C
225 lines
7.6 KiB
C
#include "config.h"
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#include <assert.h>
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#include "alMain.h"
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#include "alu.h"
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#include "alSource.h"
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#include "alAuxEffectSlot.h"
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static inline ALfloat point32(const ALfloat *vals, ALuint UNUSED(frac))
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{ return vals[0]; }
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static inline ALfloat lerp32(const ALfloat *vals, ALuint frac)
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{ return lerp(vals[0], vals[1], frac * (1.0f/FRACTIONONE)); }
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static inline ALfloat fir4_32(const ALfloat *vals, ALuint frac)
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{ return resample_fir4(vals[-1], vals[0], vals[1], vals[2], frac); }
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static inline ALfloat fir8_32(const ALfloat *vals, ALuint frac)
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{ return resample_fir8(vals[-3], vals[-2], vals[-1], vals[0], vals[1], vals[2], vals[3], vals[4], frac); }
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const ALfloat *Resample_copy32_C(const BsincState* UNUSED(state), const ALfloat *src, ALuint UNUSED(frac),
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ALuint UNUSED(increment), ALfloat *restrict dst, ALuint numsamples)
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{
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#if defined(HAVE_SSE) || defined(HAVE_NEON)
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/* Avoid copying the source data if it's aligned like the destination. */
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if((((intptr_t)src)&15) == (((intptr_t)dst)&15))
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return src;
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#endif
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memcpy(dst, src, numsamples*sizeof(ALfloat));
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return dst;
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}
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#define DECL_TEMPLATE(Sampler) \
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const ALfloat *Resample_##Sampler##_C(const BsincState* UNUSED(state), \
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const ALfloat *src, ALuint frac, ALuint increment, \
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ALfloat *restrict dst, ALuint numsamples) \
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{ \
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ALuint i; \
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for(i = 0;i < numsamples;i++) \
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{ \
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dst[i] = Sampler(src, frac); \
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\
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frac += increment; \
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src += frac>>FRACTIONBITS; \
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frac &= FRACTIONMASK; \
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} \
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return dst; \
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}
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DECL_TEMPLATE(point32)
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DECL_TEMPLATE(lerp32)
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DECL_TEMPLATE(fir4_32)
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DECL_TEMPLATE(fir8_32)
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#undef DECL_TEMPLATE
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const ALfloat *Resample_bsinc32_C(const BsincState *state, const ALfloat *src, ALuint frac,
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ALuint increment, ALfloat *restrict dst, ALuint dstlen)
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{
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const ALfloat *fil, *scd, *phd, *spd;
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const ALfloat sf = state->sf;
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const ALuint m = state->m;
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const ALint l = state->l;
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ALuint j_f, pi, i;
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ALfloat pf, r;
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ALint j_s;
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for(i = 0;i < dstlen;i++)
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{
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// Calculate the phase index and factor.
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#define FRAC_PHASE_BITDIFF (FRACTIONBITS-BSINC_PHASE_BITS)
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pi = frac >> FRAC_PHASE_BITDIFF;
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pf = (frac & ((1<<FRAC_PHASE_BITDIFF)-1)) * (1.0f/(1<<FRAC_PHASE_BITDIFF));
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#undef FRAC_PHASE_BITDIFF
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fil = state->coeffs[pi].filter;
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scd = state->coeffs[pi].scDelta;
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phd = state->coeffs[pi].phDelta;
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spd = state->coeffs[pi].spDelta;
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// Apply the scale and phase interpolated filter.
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r = 0.0f;
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for(j_f = 0,j_s = l;j_f < m;j_f++,j_s++)
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r += (fil[j_f] + sf*scd[j_f] + pf*(phd[j_f] + sf*spd[j_f])) *
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src[j_s];
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dst[i] = r;
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frac += increment;
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src += frac>>FRACTIONBITS;
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frac &= FRACTIONMASK;
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}
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return dst;
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}
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void ALfilterState_processC(ALfilterState *filter, ALfloat *restrict dst, const ALfloat *restrict src, ALuint numsamples)
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{
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ALuint i;
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if(numsamples > 1)
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{
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dst[0] = filter->b0 * src[0] +
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filter->b1 * filter->x[0] +
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filter->b2 * filter->x[1] -
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filter->a1 * filter->y[0] -
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filter->a2 * filter->y[1];
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dst[1] = filter->b0 * src[1] +
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filter->b1 * src[0] +
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filter->b2 * filter->x[0] -
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filter->a1 * dst[0] -
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filter->a2 * filter->y[0];
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for(i = 2;i < numsamples;i++)
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dst[i] = filter->b0 * src[i] +
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filter->b1 * src[i-1] +
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filter->b2 * src[i-2] -
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filter->a1 * dst[i-1] -
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filter->a2 * dst[i-2];
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filter->x[0] = src[i-1];
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filter->x[1] = src[i-2];
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filter->y[0] = dst[i-1];
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filter->y[1] = dst[i-2];
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}
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else if(numsamples == 1)
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{
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dst[0] = filter->b0 * src[0] +
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filter->b1 * filter->x[0] +
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filter->b2 * filter->x[1] -
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filter->a1 * filter->y[0] -
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filter->a2 * filter->y[1];
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filter->x[1] = filter->x[0];
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filter->x[0] = src[0];
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filter->y[1] = filter->y[0];
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filter->y[0] = dst[0];
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}
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}
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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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{
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ALuint c;
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for(c = 0;c < IrSize;c++)
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{
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const ALuint off = (Offset+c)&HRIR_MASK;
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Values[off][0] += Coeffs[c][0] * left;
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Values[off][1] += Coeffs[c][1] * right;
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Coeffs[c][0] += CoeffStep[c][0];
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Coeffs[c][1] += CoeffStep[c][1];
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}
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}
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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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{
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ALuint c;
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for(c = 0;c < IrSize;c++)
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{
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const ALuint off = (Offset+c)&HRIR_MASK;
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Values[off][0] += Coeffs[c][0] * left;
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Values[off][1] += Coeffs[c][1] * right;
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}
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}
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#define MixHrtf MixHrtf_C
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#define MixDirectHrtf MixDirectHrtf_C
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#include "mixer_inc.c"
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#undef MixHrtf
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void Mix_C(const ALfloat *data, ALuint OutChans, ALfloat (*restrict OutBuffer)[BUFFERSIZE],
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MixGains *Gains, ALuint Counter, ALuint OutPos, ALuint BufferSize)
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{
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ALfloat gain, step;
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ALuint c;
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for(c = 0;c < OutChans;c++)
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{
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ALuint pos = 0;
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gain = Gains[c].Current;
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step = Gains[c].Step;
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if(step != 0.0f && Counter > 0)
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{
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ALuint minsize = minu(BufferSize, Counter);
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for(;pos < minsize;pos++)
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{
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OutBuffer[c][OutPos+pos] += data[pos]*gain;
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gain += step;
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}
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if(pos == Counter)
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gain = Gains[c].Target;
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Gains[c].Current = gain;
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}
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if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
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continue;
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for(;pos < BufferSize;pos++)
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OutBuffer[c][OutPos+pos] += data[pos]*gain;
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}
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}
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/* Basically the inverse of the above. Rather than one input going to multiple
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* outputs (each with its own gain), it's multiple inputs (each with its own
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* gain) going to one output. This applies one row (vs one column) of a matrix
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* transform. And as the matrices are more or less static once set up, no
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* stepping is necessary.
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*/
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void MixRow_C(ALfloat *OutBuffer, const ALfloat *Gains, ALfloat (*restrict data)[BUFFERSIZE], ALuint InChans, ALuint BufferSize)
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{
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ALuint c, i;
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for(c = 0;c < InChans;c++)
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{
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ALfloat gain = Gains[c];
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if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
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continue;
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for(i = 0;i < BufferSize;i++)
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OutBuffer[i] += data[c][i] * gain;
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}
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}
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