AuroraMiddleware/AuroraOpenALSoft
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Separate the left and right output writes with UHJ encoding

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This commit is contained in:
Chris Robinson 2016-02-27 10:53:56 -08:00
parent 99f685d20d
commit adce176a35
1 changed files with 12 additions and 9 deletions
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21
Alc/uhjfilter.c
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@ -22,8 +22,8 @@ void EncodeUhj2(Uhj2Encoder *enc, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALf
for(base = 0;base < SamplesToDo;) for(base = 0;base < SamplesToDo;)
{ {
ALfloat D[MAX_UPDATE_SAMPLES], S; ALfloat D[MAX_UPDATE_SAMPLES/2], S[MAX_UPDATE_SAMPLES/2];
ALuint todo = minu(SamplesToDo - base, MAX_UPDATE_SAMPLES); ALuint todo = minu(SamplesToDo - base, MAX_UPDATE_SAMPLES/2);
/* D = 0.6554516*Y */ /* D = 0.6554516*Y */
for(i = 0;i < todo;i++) for(i = 0;i < todo;i++)
@ -63,10 +63,7 @@ void EncodeUhj2(Uhj2Encoder *enc, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALf
D[i] += enc->Filter2_WX[3].y[0]; D[i] += enc->Filter2_WX[3].y[0];
} }
/* S = 0.9396926*W' + 0.1855740*X /* S = 0.9396926*W' + 0.1855740*X */
* Left = (S + D)/2.0
* Right = (S - D)/2.0
*/
for(i = 0;i < todo;i++) for(i = 0;i < todo;i++)
{ {
ALfloat in = 0.9396926f*1.414213562f*InSamples[0][base+i] + ALfloat in = 0.9396926f*1.414213562f*InSamples[0][base+i] +
@ -81,11 +78,17 @@ void EncodeUhj2(Uhj2Encoder *enc, ALfloat (*restrict OutBuffer)[BUFFERSIZE], ALf
enc->Filter1_WX[c].y[0] = out; enc->Filter1_WX[c].y[0] = out;
in = out; in = out;
} }
S = enc->Filter1_WX[3].y[1]; S[i] = enc->Filter1_WX[3].y[1];
OutBuffer[0][base + i] += (S + D[i]) * 0.5f;
OutBuffer[1][base + i] += (S - D[i]) * 0.5f;
} }
/* Left = (S + D)/2.0
* Right = (S - D)/2.0
*/
for(i = 0;i < todo;i++)
OutBuffer[0][base + i] += (S[i] + D[i]) * 0.5f;
for(i = 0;i < todo;i++)
OutBuffer[1][base + i] += (S[i] - D[i]) * 0.5f;
base += todo; base += todo;
} }
} }