Alc/mixer_c.c

   1 #include "config.h"
   2
   3 #include <assert.h>
   4
   5 #include "alMain.h"
   6 #include "alu.h"
   7 #include "alSource.h"
   8 #include "alAuxEffectSlot.h"
   9
  10
  11 static inline ALfloat point32(const ALfloat *vals, ALuint UNUSED(frac))
  12 { return vals[0]; }
  13 static inline ALfloat lerp32(const ALfloat *vals, ALuint frac)
  14 { return lerp(vals[0], vals[1], frac * (1.0f/FRACTIONONE)); }
  15 static inline ALfloat fir4_32(const ALfloat *vals, ALuint frac)
  16 { return resample_fir4(vals[-1], vals[0], vals[1], vals[2], frac); }
  17 static inline ALfloat fir8_32(const ALfloat *vals, ALuint frac)
  18 { return resample_fir8(vals[-3], vals[-2], vals[-1], vals[0], vals[1], vals[2], vals[3], vals[4], frac); }
  19
  20
  21 const ALfloat *Resample_copy32_C(const BsincState* UNUSED(state), const ALfloat *src, ALuint UNUSED(frac),
  22   ALuint UNUSED(increment), ALfloat *restrict dst, ALuint numsamples)
  23 {
  24 #if defined(HAVE_SSE) || defined(HAVE_NEON)
  25     /* Avoid copying the source data if it's aligned like the destination. */
  26     if((((intptr_t)src)&15) == (((intptr_t)dst)&15))
  27         return src;
  28 #endif
  29     memcpy(dst, src, numsamples*sizeof(ALfloat));
  30     return dst;
  31 }
  32
  33 #define DECL_TEMPLATE(Sampler)                                                \
  34 const ALfloat *Resample_##Sampler##_C(const BsincState* UNUSED(state),        \
  35   const ALfloat *src, ALuint frac, ALuint increment,                          \
  36   ALfloat *restrict dst, ALuint numsamples)                                   \
  37 {                                                                             \
  38     ALuint i;                                                                 \
  39     for(i = 0;i < numsamples;i++)                                             \
  40     {                                                                         \
  41         dst[i] = Sampler(src, frac);                                          \
  42                                                                               \
  43         frac += increment;                                                    \
  44         src  += frac>>FRACTIONBITS;                                           \
  45         frac &= FRACTIONMASK;                                                 \
  46     }                                                                         \
  47     return dst;                                                               \
  48 }
  49
  50 DECL_TEMPLATE(point32)
  51 DECL_TEMPLATE(lerp32)
  52 DECL_TEMPLATE(fir4_32)
  53 DECL_TEMPLATE(fir8_32)
  54
  55 #undef DECL_TEMPLATE
  56
  57 const ALfloat *Resample_bsinc32_C(const BsincState *state, const ALfloat *src, ALuint frac,
  58                                   ALuint increment, ALfloat *restrict dst, ALuint dstlen)
  59 {
  60     const ALfloat *fil, *scd, *phd, *spd;
  61     const ALfloat sf = state->sf;
  62     const ALuint m = state->m;
  63     const ALint l = state->l;
  64     ALuint j_f, pi, i;
  65     ALfloat pf, r;
  66     ALint j_s;
  67
  68     for(i = 0;i < dstlen;i++)
  69     {
  70         // Calculate the phase index and factor.
  71 #define FRAC_PHASE_BITDIFF (FRACTIONBITS-BSINC_PHASE_BITS)
  72         pi = frac >> FRAC_PHASE_BITDIFF;
  73         pf = (frac & ((1<<FRAC_PHASE_BITDIFF)-1)) * (1.0f/(1<<FRAC_PHASE_BITDIFF));
  74 #undef FRAC_PHASE_BITDIFF
  75
  76         fil = state->coeffs[pi].filter;
  77         scd = state->coeffs[pi].scDelta;
  78         phd = state->coeffs[pi].phDelta;
  79         spd = state->coeffs[pi].spDelta;
  80
  81         // Apply the scale and phase interpolated filter.
  82         r = 0.0f;
  83         for(j_f = 0,j_s = l;j_f < m;j_f++,j_s++)
  84             r += (fil[j_f] + sf*scd[j_f] + pf*(phd[j_f] + sf*spd[j_f])) *
  85                     src[j_s];
  86         dst[i] = r;
  87
  88         frac += increment;
  89         src  += frac>>FRACTIONBITS;
  90         frac &= FRACTIONMASK;
  91     }
  92     return dst;
  93 }
  94
  95
  96 void ALfilterState_processC(ALfilterState *filter, ALfloat *restrict dst, const ALfloat *src, ALuint numsamples)
  97 {
  98     ALuint i;
  99     for(i = 0;i < numsamples;i++)
 100         *(dst++) = ALfilterState_processSingle(filter, *(src++));
 101 }
 102
 103
 104 static inline void SetupCoeffs(ALfloat (*restrict OutCoeffs)[2],
 105                                const HrtfParams *hrtfparams,
 106                                ALuint IrSize, ALuint Counter)
 107 {
 108     ALuint c;
 109     for(c = 0;c < IrSize;c++)
 110     {
 111         OutCoeffs[c][0] = hrtfparams->Coeffs[c][0] - (hrtfparams->CoeffStep[c][0]*Counter);
 112         OutCoeffs[c][1] = hrtfparams->Coeffs[c][1] - (hrtfparams->CoeffStep[c][1]*Counter);
 113     }
 114 }
 115
 116 static inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*restrict Values)[2],
 117                                    const ALuint IrSize,
 118                                    ALfloat (*restrict Coeffs)[2],
 119                                    const ALfloat (*restrict CoeffStep)[2],
 120                                    ALfloat left, ALfloat right)
 121 {
 122     ALuint c;
 123     for(c = 0;c < IrSize;c++)
 124     {
 125         const ALuint off = (Offset+c)&HRIR_MASK;
 126         Values[off][0] += Coeffs[c][0] * left;
 127         Values[off][1] += Coeffs[c][1] * right;
 128         Coeffs[c][0] += CoeffStep[c][0];
 129         Coeffs[c][1] += CoeffStep[c][1];
 130     }
 131 }
 132
 133 static inline void ApplyCoeffs(ALuint Offset, ALfloat (*restrict Values)[2],
 134                                const ALuint IrSize,
 135                                ALfloat (*restrict Coeffs)[2],
 136                                ALfloat left, ALfloat right)
 137 {
 138     ALuint c;
 139     for(c = 0;c < IrSize;c++)
 140     {
 141         const ALuint off = (Offset+c)&HRIR_MASK;
 142         Values[off][0] += Coeffs[c][0] * left;
 143         Values[off][1] += Coeffs[c][1] * right;
 144     }
 145 }
 146
 147 #define MixHrtf MixHrtf_C
 148 #include "mixer_inc.c"
 149 #undef MixHrtf
 150
 151
 152 void Mix_C(const ALfloat *data, ALuint OutChans, ALfloat (*restrict OutBuffer)[BUFFERSIZE],
 153            MixGains *Gains, ALuint Counter, ALuint OutPos, ALuint BufferSize)
 154 {
 155     ALfloat gain, step;
 156     ALuint c;
 157
 158     for(c = 0;c < OutChans;c++)
 159     {
 160         ALuint pos = 0;
 161         gain = Gains[c].Current;
 162         step = Gains[c].Step;
 163         if(step != 0.0f && Counter > 0)
 164         {
 165             ALuint minsize = minu(BufferSize, Counter);
 166             for(;pos < minsize;pos++)
 167             {
 168                 OutBuffer[c][OutPos+pos] += data[pos]*gain;
 169                 gain += step;
 170             }
 171             if(pos == Counter)
 172                 gain = Gains[c].Target;
 173             Gains[c].Current = gain;
 174         }
 175
 176         if(!(fabsf(gain) > GAIN_SILENCE_THRESHOLD))
 177             continue;
 178         for(;pos < BufferSize;pos++)
 179             OutBuffer[c][OutPos+pos] += data[pos]*gain;
 180     }
 181 }