diff options
Diffstat (limited to 'Alc')
| -rw-r--r-- | Alc/ALu.c | 167 |
1 files changed, 111 insertions, 56 deletions
@@ -957,20 +957,22 @@ ALvoid aluMixData(ALCcontext *ALContext,ALvoid *buffer,ALsizei size,ALenum forma //Actual sample mixing loop k = 0; Data += DataPosInt*Channels; - while(BufferSize--) + + if(Channels == 1) /* Mono */ { - for(i = 0;i < OUTPUTCHANNELS;i++) - DrySend[i] += dryGainStep[i]; - *WetSend += wetGainStep; + ALfloat outsamp; - if(Channels==1) + while(BufferSize--) { - ALfloat sample, outsamp; + for(i = 0;i < OUTPUTCHANNELS;i++) + DrySend[i] += dryGainStep[i]; + *WetSend += wetGainStep; + //First order interpolator - sample = lerp(Data[k], Data[k+1], DataPosFrac); + value = lerp(Data[k], Data[k+1], DataPosFrac); //Direct path final mix buffer and panning - outsamp = lpFilter(DryFilter, sample); + outsamp = lpFilter(DryFilter, value); DryBuffer[j][FRONT_LEFT] += outsamp*DrySend[FRONT_LEFT]; DryBuffer[j][FRONT_RIGHT] += outsamp*DrySend[FRONT_RIGHT]; DryBuffer[j][SIDE_LEFT] += outsamp*DrySend[SIDE_LEFT]; @@ -978,69 +980,122 @@ ALvoid aluMixData(ALCcontext *ALContext,ALvoid *buffer,ALsizei size,ALenum forma DryBuffer[j][BACK_LEFT] += outsamp*DrySend[BACK_LEFT]; DryBuffer[j][BACK_RIGHT] += outsamp*DrySend[BACK_RIGHT]; DryBuffer[j][CENTER] += outsamp*DrySend[CENTER]; + //Room path final mix buffer and panning - outsamp = lpFilter(WetFilter, sample); + outsamp = lpFilter(WetFilter, value); WetBuffer[j] += outsamp*(*WetSend); + + DataPosFrac += increment; + k += DataPosFrac>>FRACTIONBITS; + DataPosFrac &= FRACTIONMASK; + j++; } - else + } + else if(Channels == 2) /* Stereo */ + { + ALfloat samp1, samp2; + + *WetSend += wetGainStep*BufferSize; + while(BufferSize--) { - ALfloat samp1, samp2; - //First order interpolator (front left) + for(i = 0;i < OUTPUTCHANNELS;i++) + DrySend[i] += dryGainStep[i]; + samp1 = lerp(Data[k*Channels], Data[(k+1)*Channels], DataPosFrac); samp1 = lpFilterMC(DryFilter, FRONT_LEFT, samp1); - DryBuffer[j][FRONT_LEFT] += samp1*DrySend[FRONT_LEFT]; - //First order interpolator (front right) + samp2 = lerp(Data[k*Channels+1], Data[(k+1)*Channels+1], DataPosFrac); samp2 = lpFilterMC(DryFilter, FRONT_RIGHT, samp2); + + DryBuffer[j][FRONT_LEFT] += samp1*DrySend[FRONT_LEFT]; DryBuffer[j][FRONT_RIGHT] += samp2*DrySend[FRONT_RIGHT]; - if(Channels >= 4) - { - int i = 2; - if(Channels >= 6) - { - if(Channels != 7) - { - //First order interpolator (center) - value = lerp(Data[k*Channels+i], Data[(k+1)*Channels+i], DataPosFrac); - DryBuffer[j][CENTER] += lpFilterMC(DryFilter, CENTER, value)*DrySend[CENTER]; - i++; - } - //First order interpolator (lfe) - value = lerp(Data[k*Channels+i], Data[(k+1)*Channels+i], DataPosFrac); - DryBuffer[j][LFE] += lpFilterMC(DryFilter, LFE, value)*DrySend[LFE]; - i++; - } - //First order interpolator (back left) - value = lerp(Data[k*Channels+i], Data[(k+1)*Channels+i], DataPosFrac); - DryBuffer[j][BACK_LEFT] += lpFilterMC(DryFilter, BACK_LEFT, value)*DrySend[BACK_LEFT]; - i++; - //First order interpolator (back right) - value = lerp(Data[k*Channels+i], Data[(k+1)*Channels+i], DataPosFrac); - DryBuffer[j][BACK_RIGHT] += lpFilterMC(DryFilter, BACK_RIGHT, value)*DrySend[BACK_RIGHT]; - i++; - if(Channels >= 7) - { - //First order interpolator (side left) - value = lerp(Data[k*Channels+i], Data[(k+1)*Channels+i], DataPosFrac); - DryBuffer[j][SIDE_LEFT] += lpFilterMC(DryFilter, SIDE_LEFT, value)*DrySend[SIDE_LEFT]; - i++; - //First order interpolator (side right) - value = lerp(Data[k*Channels+i], Data[(k+1)*Channels+i], DataPosFrac); - DryBuffer[j][SIDE_RIGHT] += lpFilterMC(DryFilter, SIDE_RIGHT, value)*DrySend[SIDE_RIGHT]; - i++; - } - } - else if(DuplicateStereo) + if(DuplicateStereo) { //Duplicate stereo channels on the back speakers DryBuffer[j][BACK_LEFT] += samp1*DrySend[BACK_LEFT]; DryBuffer[j][BACK_RIGHT] += samp2*DrySend[BACK_RIGHT]; } + + DataPosFrac += increment; + k += DataPosFrac>>FRACTIONBITS; + DataPosFrac &= FRACTIONMASK; + j++; + } + } + else if(Channels == 4) /* Quad */ + { + const int chans[] = { + FRONT_LEFT, FRONT_RIGHT, + BACK_LEFT, BACK_RIGHT + }; + +#define DO_MIX() do { \ + *WetSend += wetGainStep*BufferSize; \ + while(BufferSize--) \ + { \ + for(i = 0;i < OUTPUTCHANNELS;i++) \ + DrySend[i] += dryGainStep[i]; \ + \ + for(i = 0;i < Channels;i++) \ + { \ + value = lerp(Data[k*Channels + i], Data[(k+1)*Channels + i], DataPosFrac); \ + DryBuffer[j][chans[i]] += lpFilterMC(DryFilter, chans[i], value)*DrySend[chans[i]]; \ + } \ + \ + DataPosFrac += increment; \ + k += DataPosFrac>>FRACTIONBITS; \ + DataPosFrac &= FRACTIONMASK; \ + j++; \ + } \ +} while(0) + + DO_MIX(); + } + else if(Channels == 6) /* 5.1 */ + { + const int chans[] = { + FRONT_LEFT, FRONT_RIGHT, + CENTER, LFE, + BACK_LEFT, BACK_RIGHT + }; + + DO_MIX(); + } + else if(Channels == 7) /* 6.1 */ + { + const int chans[] = { + FRONT_LEFT, FRONT_RIGHT, + LFE, + BACK_LEFT, BACK_RIGHT, + SIDE_LEFT, SIDE_RIGHT + }; + + DO_MIX(); + } + else if(Channels == 8) /* 7.1 */ + { + const int chans[] = { + FRONT_LEFT, FRONT_RIGHT, + CENTER, LFE, + BACK_LEFT, BACK_RIGHT, + SIDE_LEFT, SIDE_RIGHT + }; + + DO_MIX(); +#undef DO_MIX + } + else /* Unknown? */ + { + *WetSend += wetGainStep*BufferSize; + for(i = 0;i < OUTPUTCHANNELS;i++) + DrySend[i] += dryGainStep[i]*BufferSize; + while(BufferSize--) + { + DataPosFrac += increment; + k += DataPosFrac>>FRACTIONBITS; + DataPosFrac &= FRACTIONMASK; + j++; } - DataPosFrac += increment; - k += DataPosFrac>>FRACTIONBITS; - DataPosFrac &= FRACTIONMASK; - j++; } DataPosInt += k; |