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Re-enable stereo duplication

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This commit is contained in:
Chris Robinson 2010-04-08 23:00:14 -07:00
parent 97b00670f5
commit 371058fb9e
1 changed files with 55 additions and 0 deletions
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55
Alc/ALu.c
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@ -1084,6 +1084,61 @@ another_source:
break;
}
#undef DO_MIX
}
else if(Channels == 2 && DuplicateStereo) /* Stereo */
{
const int chans[] = {
FRONT_LEFT, FRONT_RIGHT
};
const int chans2[] = {
BACK_LEFT, SIDE_LEFT, BACK_RIGHT, SIDE_RIGHT
};
const ALfloat scaler = aluSqrt(1.0f/Channels);
const ALfloat dupscaler = aluSqrt(1.0f/3.0f);
#define DO_MIX(resampler) do { \
while(BufferSize--) \
{ \
for(i = 0;i < OUTPUTCHANNELS;i++) \
DrySend[i] += dryGainStep[i]; \
for(i = 0;i < MAX_SENDS;i++) \
WetSend[i] += wetGainStep[i]; \
\
for(i = 0;i < Channels;i++) \
{ \
value = (resampler)(Data[k*Channels + i],Data[(k+1)*Channels + i],\
DataPosFrac); \
outsamp = lpFilter2P(DryFilter, chans[i]*2, value) * dupscaler; \
DryBuffer[j][chans[i]] += outsamp*DrySend[chans[i]]; \
DryBuffer[j][chans2[i*2+0]] += outsamp*DrySend[chans2[i*2+0]]; \
DryBuffer[j][chans2[i*2+1]] += outsamp*DrySend[chans2[i*2+1]]; \
for(out = 0;out < MAX_SENDS;out++) \
{ \
outsamp = lpFilter1P(WetFilter[out], chans[i], value); \
WetBuffer[out][j] += outsamp*WetSend[out]*scaler; \
} \
} \
\
DataPosFrac += increment; \
k += DataPosFrac>>FRACTIONBITS; \
DataPosFrac &= FRACTIONMASK; \
j++; \
} \
} while(0)
switch(Resampler)
{
case POINT_RESAMPLER:
DO_MIX(point); break;
case LINEAR_RESAMPLER:
DO_MIX(lerp); break;
case COSINE_RESAMPLER:
DO_MIX(cos_lerp); break;
case RESAMPLER_MIN:
case RESAMPLER_MAX:
break;
}
#undef DO_MIX
}
else if(Channels == 2) /* Stereo */
{