diff options
Diffstat (limited to 'OpenAL32')
| -rw-r--r-- | OpenAL32/Include/alu.h | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/OpenAL32/Include/alu.h b/OpenAL32/Include/alu.h index 78f05b63..b1c62553 100644 --- a/OpenAL32/Include/alu.h +++ b/OpenAL32/Include/alu.h @@ -59,7 +59,9 @@ enum Resampler { }; extern enum Resampler ResamplerDefault; -/* The number of distinct scale and phase intervals within the filter table. */ +/* The number of distinct scale and phase intervals within the bsinc filter + * table. + */ #define BSINC_SCALE_BITS 4 #define BSINC_SCALE_COUNT (1<<BSINC_SCALE_BITS) #define BSINC_PHASE_BITS 4 @@ -80,8 +82,13 @@ typedef struct BsincState { const ALfloat *filter; } BsincState; +typedef struct Sinc4State { + const ALfloat (*filter)[4]; +} Sinc4State; + typedef union InterpState { BsincState bsinc; + Sinc4State sinc4; } InterpState; ALboolean BsincPrepare(const ALuint increment, BsincState *state); @@ -381,17 +388,14 @@ inline ALuint64 clampu64(ALuint64 val, ALuint64 min, ALuint64 max) { return minu64(max, maxu64(min, val)); } -extern alignas(16) const ALfloat sinc4Tab[FRACTIONONE][4]; - - inline ALfloat lerp(ALfloat val1, ALfloat val2, ALfloat mu) { return val1 + (val2-val1)*mu; } -inline ALfloat resample_fir4(ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALsizei frac) +inline ALfloat resample_fir4(const ALfloat (*restrict filter)[4], ALfloat val0, ALfloat val1, ALfloat val2, ALfloat val3, ALsizei frac) { - return sinc4Tab[frac][0]*val0 + sinc4Tab[frac][1]*val1 + - sinc4Tab[frac][2]*val2 + sinc4Tab[frac][3]*val3; + return filter[frac][0]*val0 + filter[frac][1]*val1 + + filter[frac][2]*val2 + filter[frac][3]*val3; } |