diff options
Diffstat (limited to 'Alc')
| -rw-r--r-- | Alc/ALu.c | 55 |
1 files changed, 55 insertions, 0 deletions
@@ -1085,6 +1085,61 @@ another_source: } #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 */ { const int chans[] = { |