diff options
| author | Chris Robinson <[email protected]> | 2011-07-16 16:24:01 -0700 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2011-07-16 16:24:01 -0700 |
| commit | 5f566ebf05873aafd54b7613d35d363fbb8943c2 (patch) | |
| tree | 06a04bc5880e06cc43947f782b6a01da7e0c0890 /Alc/mixer.c | |
| parent | 1622986467c96abc06a0234f41eab45a95e02fba (diff) | |
Fade between HRTF coefficients, to reduce noise from sudden changes
Diffstat (limited to 'Alc/mixer.c')
| -rw-r--r-- | Alc/mixer.c | 77 |
1 files changed, 68 insertions, 9 deletions
diff --git a/Alc/mixer.c b/Alc/mixer.c index fd351f19..665ef3f8 100644 --- a/Alc/mixer.c +++ b/Alc/mixer.c @@ -76,8 +76,10 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ { \ const ALuint NumChannels = Source->NumChannels; \ const T *RESTRICT data = srcdata; \ + const ALint *RESTRICT DelayStep = Source->Params.HrtfDelayStep; \ ALfloat (*RESTRICT DryBuffer)[MAXCHANNELS]; \ ALfloat *RESTRICT ClickRemoval, *RESTRICT PendingClicks; \ + ALfloat (*RESTRICT CoeffStep)[2] = Source->Params.HrtfCoeffStep; \ ALuint pos, frac; \ FILTER *DryFilter; \ ALuint BufferIdx; \ @@ -97,38 +99,85 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ \ for(i = 0;i < NumChannels;i++) \ { \ - ALfloat (*RESTRICT Coeffs)[2] = Source->Params.HrtfCoeffs[i]; \ - const ALuint *RESTRICT Delay = Source->Params.HrtfDelay[i]; \ + ALfloat (*RESTRICT TargetCoeffs)[2] = Source->Params.HrtfCoeffs[i]; \ + ALuint *RESTRICT TargetDelay = Source->Params.HrtfDelay[i]; \ ALfloat *RESTRICT History = Source->HrtfHistory[i]; \ ALfloat (*RESTRICT Values)[2] = Source->HrtfValues[i]; \ + ALint Counter = __max(Source->HrtfCounter, OutPos) - OutPos; \ ALuint Offset = Source->HrtfOffset + OutPos; \ + ALfloat Coeffs[HRIR_LENGTH][2]; \ + ALuint Delay[2]; \ ALfloat left, right; \ \ pos = 0; \ frac = *DataPosFrac; \ \ + for(c = 0;c < HRIR_LENGTH;c++) \ + { \ + Coeffs[c][0] = TargetCoeffs[c][0] - (CoeffStep[c][0]*Counter); \ + Coeffs[c][1] = TargetCoeffs[c][1] - (CoeffStep[c][1]*Counter); \ + } \ + \ + Delay[0] = TargetDelay[0] - (DelayStep[0]*Counter) + 32768; \ + Delay[1] = TargetDelay[1] - (DelayStep[1]*Counter) + 32768; \ + \ if(LIKELY(OutPos == 0)) \ { \ value = sampler(data + pos*NumChannels + i, NumChannels, frac); \ value = lpFilter2PC(DryFilter, i, value); \ \ History[Offset&SRC_HISTORY_MASK] = value; \ - left = History[(Offset-Delay[0])&SRC_HISTORY_MASK]; \ - right = History[(Offset-Delay[1])&SRC_HISTORY_MASK]; \ + left = History[(Offset-(Delay[0]>>16))&SRC_HISTORY_MASK]; \ + right = History[(Offset-(Delay[1]>>16))&SRC_HISTORY_MASK]; \ \ ClickRemoval[FRONT_LEFT] -= Values[(Offset+1)&HRIR_MASK][0] + \ Coeffs[0][0] * left; \ ClickRemoval[FRONT_RIGHT] -= Values[(Offset+1)&HRIR_MASK][1] + \ Coeffs[0][1] * right; \ } \ - for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ + for(BufferIdx = 0;BufferIdx < BufferSize && Counter > 0;BufferIdx++) \ + { \ + value = sampler(data + pos*NumChannels + i, NumChannels, frac); \ + value = lpFilter2P(DryFilter, i, value); \ + \ + History[Offset&SRC_HISTORY_MASK] = value; \ + left = History[(Offset-(Delay[0]>>16))&SRC_HISTORY_MASK]; \ + right = History[(Offset-(Delay[1]>>16))&SRC_HISTORY_MASK]; \ + \ + Delay[0] += DelayStep[0]; \ + Delay[1] += DelayStep[1]; \ + \ + Values[Offset&HRIR_MASK][0] = 0.0f; \ + Values[Offset&HRIR_MASK][1] = 0.0f; \ + Offset++; \ + \ + for(c = 0;c < HRIR_LENGTH;c++) \ + { \ + const ALuint off = (Offset+c)&HRIR_MASK; \ + Values[off][0] += Coeffs[c][0] * left; \ + Values[off][1] += Coeffs[c][1] * right; \ + Coeffs[c][0] += CoeffStep[c][0]; \ + Coeffs[c][1] += CoeffStep[c][1]; \ + } \ + \ + DryBuffer[OutPos][FRONT_LEFT] += Values[Offset&HRIR_MASK][0]; \ + DryBuffer[OutPos][FRONT_RIGHT] += Values[Offset&HRIR_MASK][1]; \ + \ + frac += increment; \ + pos += frac>>FRACTIONBITS; \ + frac &= FRACTIONMASK; \ + OutPos++; \ + Counter--; \ + } \ + \ + for(;BufferIdx < BufferSize;BufferIdx++) \ { \ value = sampler(data + pos*NumChannels + i, NumChannels, frac); \ value = lpFilter2P(DryFilter, i, value); \ \ History[Offset&SRC_HISTORY_MASK] = value; \ - left = History[(Offset-Delay[0])&SRC_HISTORY_MASK]; \ - right = History[(Offset-Delay[1])&SRC_HISTORY_MASK]; \ + left = History[(Offset-(Delay[0]>>16))&SRC_HISTORY_MASK]; \ + right = History[(Offset-(Delay[1]>>16))&SRC_HISTORY_MASK]; \ \ Values[Offset&HRIR_MASK][0] = 0.0f; \ Values[Offset&HRIR_MASK][1] = 0.0f; \ @@ -155,8 +204,8 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ value = lpFilter2PC(DryFilter, i, value); \ \ History[Offset&SRC_HISTORY_MASK] = value; \ - left = History[(Offset-Delay[0])&SRC_HISTORY_MASK]; \ - right = History[(Offset-Delay[1])&SRC_HISTORY_MASK]; \ + left = History[(Offset-(Delay[0]>>16))&SRC_HISTORY_MASK]; \ + right = History[(Offset-(Delay[1]>>16))&SRC_HISTORY_MASK]; \ \ PendingClicks[FRONT_LEFT] += Values[(Offset+1)&HRIR_MASK][0] + \ Coeffs[0][0] * left; \ @@ -743,4 +792,14 @@ ALvoid MixSource(ALsource *Source, ALCdevice *Device, ALuint SamplesToDo) Source->position_fraction = DataPosFrac; Source->Buffer = BufferListItem->buffer; Source->HrtfOffset += OutPos; + if(State == AL_PLAYING) + { + Source->HrtfCounter = __max(Source->HrtfCounter, OutPos) - OutPos; + Source->HrtfMoving = AL_TRUE; + } + else + { + Source->HrtfCounter = 0; + Source->HrtfMoving = AL_FALSE; + } } |