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 cubic32(const ALfloat *vals, ALuint frac)
  16 { return cubic(vals[-1], vals[0], vals[1], vals[2], frac * (1.0f/FRACTIONONE)); }
  17
  18 void Resample_copy32_C(const ALfloat *data, ALuint UNUSED(frac),
  19   ALuint increment, ALfloat *restrict OutBuffer, ALuint BufferSize)
  20 {
  21     assert(increment==FRACTIONONE);
  22     memcpy(OutBuffer, data, BufferSize*sizeof(ALfloat));
  23 }
  24
  25 #define DECL_TEMPLATE(Sampler)                                                \
  26 void Resample_##Sampler##_C(const ALfloat *data, ALuint frac,                 \
  27   ALuint increment, ALfloat *restrict OutBuffer, ALuint BufferSize)           \
  28 {                                                                             \
  29     ALuint pos = 0;                                                           \
  30     ALuint i;                                                                 \
  31                                                                               \
  32     for(i = 0;i < BufferSize;i++)                                             \
  33     {                                                                         \
  34         OutBuffer[i] = Sampler(data + pos, frac);                             \
  35                                                                               \
  36         frac += increment;                                                    \
  37         pos  += frac>>FRACTIONBITS;                                           \
  38         frac &= FRACTIONMASK;                                                 \
  39     }                                                                         \
  40 }
  41
  42 DECL_TEMPLATE(point32)
  43 DECL_TEMPLATE(lerp32)
  44 DECL_TEMPLATE(cubic32)
  45
  46 #undef DECL_TEMPLATE
  47
  48
  49 static inline void ApplyCoeffsStep(ALuint Offset, ALfloat (*restrict Values)[2],
  50                                    const ALuint IrSize,
  51                                    ALfloat (*restrict Coeffs)[2],
  52                                    const ALfloat (*restrict CoeffStep)[2],
  53                                    ALfloat left, ALfloat right)
  54 {
  55     ALuint c;
  56     for(c = 0;c < IrSize;c++)
  57     {
  58         const ALuint off = (Offset+c)&HRIR_MASK;
  59         Values[off][0] += Coeffs[c][0] * left;
  60         Values[off][1] += Coeffs[c][1] * right;
  61         Coeffs[c][0] += CoeffStep[c][0];
  62         Coeffs[c][1] += CoeffStep[c][1];
  63     }
  64 }
  65
  66 static inline void ApplyCoeffs(ALuint Offset, ALfloat (*restrict Values)[2],
  67                                const ALuint IrSize,
  68                                ALfloat (*restrict Coeffs)[2],
  69                                ALfloat left, ALfloat right)
  70 {
  71     ALuint c;
  72     for(c = 0;c < IrSize;c++)
  73     {
  74         const ALuint off = (Offset+c)&HRIR_MASK;
  75         Values[off][0] += Coeffs[c][0] * left;
  76         Values[off][1] += Coeffs[c][1] * right;
  77     }
  78 }
  79
  80 #define SUFFIX C
  81 #include "mixer_inc.c"
  82 #undef SUFFIX
  83
  84
  85 void MixDirect_C(DirectParams *params, const ALfloat *restrict data, ALuint srcchan,
  86   ALuint OutPos, ALuint BufferSize)
  87 {
  88     ALfloat (*restrict OutBuffer)[BUFFERSIZE] = params->OutBuffer;
  89     ALuint Counter = maxu(params->Counter, OutPos) - OutPos;
  90     ALfloat DrySend, Step;
  91     ALuint c;
  92
  93     for(c = 0;c < MaxChannels;c++)
  94     {
  95         ALuint pos = 0;
  96         DrySend = params->Mix.Gains.Current[srcchan][c];
  97         Step = params->Mix.Gains.Step[srcchan][c];
  98         if(Step != 1.0f && Counter > 0)
  99         {
 100             for(;pos < BufferSize && pos < Counter;pos++)
 101             {
 102                 OutBuffer[c][OutPos+pos] += data[pos]*DrySend;
 103                 DrySend *= Step;
 104             }
 105             if(pos == Counter)
 106                 DrySend = params->Mix.Gains.Target[srcchan][c];
 107             params->Mix.Gains.Current[srcchan][c] = DrySend;
 108         }
 109
 110         if(!(DrySend > GAIN_SILENCE_THRESHOLD))
 111             continue;
 112         for(;pos < BufferSize;pos++)
 113             OutBuffer[c][OutPos+pos] += data[pos]*DrySend;
 114     }
 115 }
 116
 117
 118 void MixSend_C(SendParams *params, const ALfloat *restrict data,
 119   ALuint OutPos, ALuint BufferSize)
 120 {
 121     ALfloat (*restrict OutBuffer)[BUFFERSIZE] = params->OutBuffer;
 122     ALuint Counter = maxu(params->Counter, OutPos) - OutPos;
 123     ALfloat WetSend, Step;
 124
 125     {
 126         ALuint pos = 0;
 127         WetSend = params->Gain.Current;
 128         Step = params->Gain.Step;
 129         if(Step != 1.0f && Counter > 0)
 130         {
 131             for(;pos < BufferSize && pos < Counter;pos++)
 132             {
 133                 OutBuffer[0][OutPos+pos] += data[pos]*WetSend;
 134                 WetSend *= Step;
 135             }
 136             if(pos == Counter)
 137                 WetSend = params->Gain.Target;
 138             params->Gain.Current = WetSend;
 139         }
 140
 141         if(!(WetSend > GAIN_SILENCE_THRESHOLD))
 142             return;
 143         for(;pos < BufferSize;pos++)
 144             OutBuffer[0][OutPos+pos] += data[pos] * WetSend;
 145     }
 146 }