diff options
| author | Chris Robinson <[email protected]> | 2010-11-26 01:07:54 -0800 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2010-11-26 01:07:54 -0800 |
| commit | de8b7fbc5fa76327bba59a620fa2c6d946d226db (patch) | |
| tree | 35df890590493b3a459030240f96f205f2fc6b82 /Alc/mixer.c | |
| parent | 98d78f7ff9a3636567273e4384731debca2ec79f (diff) | |
Share the interpolation functions and use them in the reverb effect
Diffstat (limited to 'Alc/mixer.c')
| -rw-r--r-- | Alc/mixer.c | 32 |
1 files changed, 9 insertions, 23 deletions
diff --git a/Alc/mixer.c b/Alc/mixer.c index f16a2e0c..74af356d 100644 --- a/Alc/mixer.c +++ b/Alc/mixer.c @@ -37,43 +37,29 @@ #include "bs2b.h" -static __inline ALdouble lerp(ALdouble val1, ALdouble val2, ALint frac) -{ - val1 += ((val2-val1) * (frac * (1.0/(1<<FRACTIONBITS)))); - return val1; -} -static __inline ALdouble cubic(ALdouble val0, ALdouble val1, ALdouble val2, ALdouble val3, ALint frac) -{ - ALdouble mu = frac * (1.0/(1<<FRACTIONBITS)); - ALdouble mu2 = mu*mu; - ALdouble a0 = -0.5*val0 + 1.5*val1 + -1.5*val2 + 0.5*val3; - ALdouble a1 = val0 + -2.5*val1 + 2.0*val2 + -0.5*val3; - ALdouble a2 = -0.5*val0 + 0.5*val2; - ALdouble a3 = val1; - - return a0*mu*mu2 + a1*mu2 + a2*mu + a3; -} - static __inline ALdouble point32(const ALfloat *vals, ALint step, ALint frac) { return vals[0]; (void)step; (void)frac; } static __inline ALdouble lerp32(const ALfloat *vals, ALint step, ALint frac) -{ return lerp(vals[0], vals[step], frac); } +{ return lerp(vals[0], vals[step], frac * (1.0/(1<<FRACTIONBITS))); } static __inline ALdouble cubic32(const ALfloat *vals, ALint step, ALint frac) -{ return cubic(vals[-step], vals[0], vals[step], vals[step+step], frac); } +{ return cubic(vals[-step], vals[0], vals[step], vals[step+step], + frac * (1.0/(1<<FRACTIONBITS))); } static __inline ALdouble point16(const ALshort *vals, ALint step, ALint frac) { return vals[0] / 32767.0; (void)step; (void)frac; } static __inline ALdouble lerp16(const ALshort *vals, ALint step, ALint frac) -{ return lerp(vals[0], vals[step], frac) / 32767.0; } +{ return lerp(vals[0], vals[step], frac * (1.0/(1<<FRACTIONBITS))) / 32767.0; } static __inline ALdouble cubic16(const ALshort *vals, ALint step, ALint frac) -{ return cubic(vals[-step], vals[0], vals[step], vals[step+step], frac) / 32767.0; } +{ return cubic(vals[-step], vals[0], vals[step], vals[step+step], + frac * (1.0/(1<<FRACTIONBITS))) / 32767.0; } static __inline ALdouble point8(const ALubyte *vals, ALint step, ALint frac) { return (vals[0]-128.0) / 127.0; (void)step; (void)frac; } static __inline ALdouble lerp8(const ALubyte *vals, ALint step, ALint frac) -{ return (lerp(vals[0], vals[step], frac)-128.0) / 127.0; } +{ return (lerp(vals[0], vals[step], frac * (1.0/(1<<FRACTIONBITS)))-128.0) / 127.0; } static __inline ALdouble cubic8(const ALubyte *vals, ALint step, ALint frac) -{ return (cubic(vals[-step], vals[0], vals[step], vals[step+step], frac)-128.0) / 127.0; } +{ return (cubic(vals[-step], vals[0], vals[step], vals[step+step], + frac * (1.0/(1<<FRACTIONBITS)))-128.0) / 127.0; } #define DECL_TEMPLATE(T, sampler) \ |