diff options
Diffstat (limited to 'Alc/mixer_c.c')
| -rw-r--r-- | Alc/mixer_c.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/Alc/mixer_c.c b/Alc/mixer_c.c index 7952ec93..f741e28f 100644 --- a/Alc/mixer_c.c +++ b/Alc/mixer_c.c @@ -96,8 +96,41 @@ const ALfloat *Resample_bsinc32_C(const BsincState *state, const ALfloat *src, A void ALfilterState_processC(ALfilterState *filter, ALfloat *restrict dst, const ALfloat *src, ALuint numsamples) { ALuint i; - for(i = 0;i < numsamples;i++) - *(dst++) = ALfilterState_processSingle(filter, *(src++)); + if(numsamples > 1) + { + dst[0] = filter->input_gain * src[0] + + filter->b1 * filter->x[0] + + filter->b2 * filter->x[1] - + filter->a1 * filter->y[0] - + filter->a2 * filter->y[1]; + dst[1] = filter->input_gain * src[1] + + filter->b1 * src[0] + + filter->b2 * filter->x[0] - + filter->a1 * dst[0] - + filter->a2 * filter->y[0]; + for(i = 2;i < numsamples;i++) + dst[i] = filter->input_gain * src[i] + + filter->b1 * src[i-1] + + filter->b2 * src[i-2] - + filter->a1 * dst[i-1] - + filter->a2 * dst[i-2]; + filter->x[0] = src[i-1]; + filter->x[1] = src[i-2]; + filter->y[0] = dst[i-1]; + filter->y[1] = dst[i-2]; + } + else if(numsamples == 1) + { + dst[0] = filter->input_gain * src[0] + + filter->b1 * filter->x[0] + + filter->b2 * filter->x[1] - + filter->a1 * filter->y[0] - + filter->a2 * filter->y[1]; + filter->x[1] = filter->x[0]; + filter->x[0] = src[0]; + filter->y[1] = filter->y[0]; + filter->y[0] = dst[0]; + } } |