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Return a sample pointer from DoFilters

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This allows us to avoid copying samples when no filtering is needed. Doing the
same for resampling would require another temporary buffer in the device.
This commit is contained in:
Chris Robinson
2014-05-19 01:54:52 -07:00
parent ef9dfe3772
commit 7b782f6afa
1 changed files with 18 additions and 14 deletions
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Alc/mixer.c
+18 -14
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@@ -84,23 +84,22 @@ static void SilenceData(ALfloat *dst, ALuint samples)
}
static void DoFilters(ALfilterState *lpfilter, ALfilterState *hpfilter,
ALfloat *restrict dst, const ALfloat *restrict src,
ALuint numsamples, enum ActiveFilters type)
static const ALfloat *DoFilters(ALfilterState *lpfilter, ALfilterState *hpfilter,
ALfloat *restrict dst, const ALfloat *restrict src,
ALuint numsamples, enum ActiveFilters type)
{
ALuint i;
switch(type)
{
case AF_None:
memcpy(dst, src, numsamples * sizeof(ALfloat));
break;
case AF_LowPass:
ALfilterState_process(lpfilter, dst, src, numsamples);
break;
return dst;
case AF_HighPass:
ALfilterState_process(hpfilter, dst, src, numsamples);
break;
return dst;
case AF_BandPass:
for(i = 0;i < numsamples;)
@@ -112,8 +111,9 @@ static void DoFilters(ALfilterState *lpfilter, ALfilterState *hpfilter,
ALfilterState_process(hpfilter, dst, temp, todo);
i += todo;
}
break;
return dst;
}
return src;
}
@@ -346,11 +346,13 @@ ALvoid MixSource(ALactivesource *src, ALCdevice *Device, ALuint SamplesToDo)
{
DirectParams *parms = &src->Direct;
const ALfloat *samples;
DoFilters(&parms->LpFilter[chan], &parms->HpFilter[chan], SrcData,
ResampledData, DstBufferSize, parms->Filters[chan]);
samples = DoFilters(&parms->LpFilter[chan], &parms->HpFilter[chan],
SrcData, ResampledData, DstBufferSize,
parms->Filters[chan]);
if(!src->IsHrtf)
src->Dry.Mix(parms->OutBuffer, SrcData, &parms->Mix.Gains[chan],
src->Dry.Mix(parms->OutBuffer, samples, &parms->Mix.Gains[chan],
maxu(parms->Counter, OutPos) - OutPos, OutPos,
DstBufferSize);
else
@@ -364,13 +366,15 @@ ALvoid MixSource(ALactivesource *src, ALCdevice *Device, ALuint SamplesToDo)
for(j = 0;j < Device->NumAuxSends;j++)
{
SendParams *parms = &src->Send[j];
const ALfloat *samples;
if(!parms->OutBuffer)
continue;
DoFilters(&parms->LpFilter[chan], &parms->HpFilter[chan],
SrcData, ResampledData, DstBufferSize,
parms->Filters[chan]);
src->WetMix(parms->OutBuffer, SrcData, &parms->Gain,
samples = DoFilters(&parms->LpFilter[chan], &parms->HpFilter[chan],
SrcData, ResampledData, DstBufferSize,
parms->Filters[chan]);
src->WetMix(parms->OutBuffer, samples, &parms->Gain,
maxu(parms->Counter, OutPos) - OutPos,
OutPos, DstBufferSize);
}