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-rw-r--r--Alc/hrtf.c35
1 files changed, 1 insertions, 34 deletions
diff --git a/Alc/hrtf.c b/Alc/hrtf.c
index 8561902e..54e16cc7 100644
--- a/Alc/hrtf.c
+++ b/Alc/hrtf.c
@@ -88,39 +88,6 @@ static void CalcAzIndices(ALuint azcount, ALfloat az, ALuint *azidx, ALfloat *az
*azmu = az - floorf(az);
}
-/* Calculates the normalized HRTF transition factor (delta) from the changes
- * in gain and listener to source angle between updates. The result is a
- * normalized delta factor that can be used to calculate moving HRIR stepping
- * values.
- */
-ALfloat CalcHrtfDelta(ALfloat oldGain, ALfloat newGain, const ALfloat olddir[3], const ALfloat newdir[3])
-{
- ALfloat gainChange, angleChange, change;
-
- // Calculate the normalized dB gain change.
- newGain = maxf(newGain, 0.0001f);
- oldGain = maxf(oldGain, 0.0001f);
- gainChange = fabsf(log10f(newGain / oldGain) / log10f(0.0001f));
-
- // Calculate the angle change only when there is enough gain to notice it.
- angleChange = 0.0f;
- if(gainChange > 0.0001f || newGain > 0.0001f)
- {
- // No angle change when the directions are equal or degenerate (when
- // both have zero length).
- if(newdir[0] != olddir[0] || newdir[1] != olddir[1] || newdir[2] != olddir[2])
- {
- ALfloat dotp = olddir[0]*newdir[0] + olddir[1]*newdir[1] + olddir[2]*newdir[2];
- angleChange = acosf(clampf(dotp, -1.0f, 1.0f)) / F_PI;
- }
- }
-
- // Use the largest of the two changes for the delta factor, and apply a
- // significance shaping function to it.
- change = maxf(angleChange * 25.0f, gainChange) * 2.0f;
- return minf(change, 1.0f);
-}
-
/* Calculates static HRIR coefficients and delays for the given polar
* elevation and azimuth in radians. Linear interpolation is used to
* increase the apparent resolution of the HRIR data set. The coefficients
@@ -246,7 +213,7 @@ ALuint GetMovingHrtfCoeffs(const struct Hrtf *Hrtf, ALfloat elevation, ALfloat a
}
// Calculate the stepping parameters.
- steps = maxf(floorf(delta*(Hrtf->sampleRate*0.015f) + 0.5f), 1.0f);
+ steps = maxf(floorf(delta*Hrtf->sampleRate + 0.5f), 1.0f);
delta = 1.0f / steps;
/* Calculate 4 blending weights for 2D bilinear interpolation. */