diff options
| author | Chris Robinson <[email protected]> | 2011-06-03 01:06:00 -0700 |
|---|---|---|
| committer | Chris Robinson <[email protected]> | 2011-06-03 01:06:00 -0700 |
| commit | 7ddfacb58f941b21da26b2749d3204307e3a0bbd (patch) | |
| tree | 2cb41f7de025705f38a634781e6413c7c004829e /Alc/mixer.c | |
| parent | c7a80418d9291cad29dc293b95a5c328f4408b08 (diff) | |
Use a minimum phase HRTF data set
This reduces the coefficient size from 128 down to 32, with a set of delays
Diffstat (limited to 'Alc/mixer.c')
| -rw-r--r-- | Alc/mixer.c | 72 |
1 files changed, 40 insertions, 32 deletions
diff --git a/Alc/mixer.c b/Alc/mixer.c index 33181890..9a746ff9 100644 --- a/Alc/mixer.c +++ b/Alc/mixer.c @@ -79,9 +79,6 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ const T *RESTRICT data = srcdata; \ ALfloat (*RESTRICT DryBuffer)[MAXCHANNELS]; \ ALfloat *RESTRICT ClickRemoval, *RESTRICT PendingClicks; \ - ALfloat (*RESTRICT HrtfCoeffs)[HRTF_LENGTH][2]; \ - ALfloat (*RESTRICT HrtfHistory)[HRTF_LENGTH]; \ - ALuint HrtfOffset; \ ALuint pos, frac; \ FILTER *DryFilter; \ ALuint BufferIdx; \ @@ -96,15 +93,17 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ PendingClicks = Device->PendingClicks; \ DryFilter = &Source->Params.iirFilter; \ \ - HrtfCoeffs = Source->Params.HrtfCoeffs; \ - HrtfHistory = Source->HrtfHistory; \ - HrtfOffset = Source->HrtfOffset + OutPos; \ - \ pos = 0; \ frac = *DataPosFrac; \ \ for(i = 0;i < NumChannels;i++) \ { \ + static const ALuint MaxDelay = SRC_HISTORY_LENGTH - HRIR_LENGTH; \ + ALfloat (*RESTRICT Coeffs)[2] = Source->Params.HrtfCoeffs[i]; \ + const ALuint *RESTRICT Delay = Source->Params.HrtfDelay[i]; \ + ALfloat (*RESTRICT History)[2] = Source->HrtfHistory[i]; \ + ALuint Offset = Source->HrtfOffset + OutPos; \ + \ pos = 0; \ frac = *DataPosFrac; \ \ @@ -113,15 +112,18 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ value = sampler(data + pos*NumChannels + i, NumChannels, frac); \ value = lpFilter2PC(DryFilter, i, value); \ \ - HrtfHistory[i][HrtfOffset&HRTF_LENGTH_MASK] = value; \ - for(c = 0;c < HRTF_LENGTH;c++) \ + History[Offset&SRC_HISTORY_MASK][0] = value; \ + History[Offset&SRC_HISTORY_MASK][1] = value; \ + \ + History[(Offset-MaxDelay)&SRC_HISTORY_MASK][0] = \ + History[(Offset-Delay[0])&SRC_HISTORY_MASK][0];\ + History[(Offset-MaxDelay)&SRC_HISTORY_MASK][1] = \ + History[(Offset-Delay[1])&SRC_HISTORY_MASK][1];\ + for(c = 0;c < HRIR_LENGTH;c++) \ { \ - ClickRemoval[FRONT_LEFT] -= \ - HrtfHistory[i][(HrtfOffset-c)&HRTF_LENGTH_MASK] * \ - HrtfCoeffs[i][c][0]; \ - ClickRemoval[FRONT_RIGHT] -= \ - HrtfHistory[i][(HrtfOffset-c)&HRTF_LENGTH_MASK] * \ - HrtfCoeffs[i][c][1]; \ + const ALuint off = (Offset-MaxDelay-c)&SRC_HISTORY_MASK; \ + ClickRemoval[FRONT_LEFT] -= History[off][0] * Coeffs[c][0]; \ + ClickRemoval[FRONT_RIGHT] -= History[off][1] * Coeffs[c][1]; \ } \ } \ for(BufferIdx = 0;BufferIdx < BufferSize;BufferIdx++) \ @@ -129,17 +131,20 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ value = sampler(data + pos*NumChannels + i, NumChannels, frac); \ value = lpFilter2P(DryFilter, i, value); \ \ - HrtfHistory[i][HrtfOffset&HRTF_LENGTH_MASK] = value; \ - for(c = 0;c < HRTF_LENGTH;c++) \ + History[Offset&SRC_HISTORY_MASK][0] = value; \ + History[Offset&SRC_HISTORY_MASK][1] = value; \ + \ + History[(Offset-MaxDelay)&SRC_HISTORY_MASK][0] = \ + History[(Offset-Delay[0])&SRC_HISTORY_MASK][0];\ + History[(Offset-MaxDelay)&SRC_HISTORY_MASK][1] = \ + History[(Offset-Delay[1])&SRC_HISTORY_MASK][1];\ + for(c = 0;c < HRIR_LENGTH;c++) \ { \ - DryBuffer[OutPos][FRONT_LEFT] += \ - HrtfHistory[i][(HrtfOffset-c)&HRTF_LENGTH_MASK] * \ - HrtfCoeffs[i][c][0]; \ - DryBuffer[OutPos][FRONT_RIGHT] += \ - HrtfHistory[i][(HrtfOffset-c)&HRTF_LENGTH_MASK] * \ - HrtfCoeffs[i][c][1]; \ + const ALuint off = (Offset-MaxDelay-c)&SRC_HISTORY_MASK; \ + DryBuffer[OutPos][FRONT_LEFT] += History[off][0] * Coeffs[c][0];\ + DryBuffer[OutPos][FRONT_RIGHT] += History[off][1] * Coeffs[c][1];\ } \ - HrtfOffset++; \ + Offset++; \ \ frac += increment; \ pos += frac>>FRACTIONBITS; \ @@ -151,15 +156,18 @@ static void Mix_Hrtf_##T##_##sampler(ALsource *Source, ALCdevice *Device, \ value = sampler(data + pos*NumChannels + i, NumChannels, frac); \ value = lpFilter2PC(DryFilter, i, value); \ \ - HrtfHistory[i][HrtfOffset&HRTF_LENGTH_MASK] = value; \ - for(c = 0;c < HRTF_LENGTH;c++) \ + History[Offset&SRC_HISTORY_MASK][0] = value; \ + History[Offset&SRC_HISTORY_MASK][1] = value; \ + \ + History[(Offset-MaxDelay)&SRC_HISTORY_MASK][0] = \ + History[(Offset-Delay[0])&SRC_HISTORY_MASK][0];\ + History[(Offset-MaxDelay)&SRC_HISTORY_MASK][1] = \ + History[(Offset-Delay[1])&SRC_HISTORY_MASK][1];\ + for(c = 0;c < HRIR_LENGTH;c++) \ { \ - PendingClicks[FRONT_LEFT] += \ - HrtfHistory[i][(HrtfOffset-c)&HRTF_LENGTH_MASK] * \ - HrtfCoeffs[i][c][0]; \ - PendingClicks[FRONT_RIGHT] += \ - HrtfHistory[i][(HrtfOffset-c)&HRTF_LENGTH_MASK] * \ - HrtfCoeffs[i][c][1]; \ + const ALuint off = (Offset-MaxDelay-c)&SRC_HISTORY_MASK; \ + PendingClicks[FRONT_LEFT] += History[off][0] * Coeffs[c][0]; \ + PendingClicks[FRONT_RIGHT] += History[off][1] * Coeffs[c][1]; \ } \ } \ OutPos -= BufferSize; \ |