3D Audio GSoC:

Adapting all readers to maximally support dynamic resampling/rechanneling, introducing a DynamicIIRFilter for example.

1 files changed, 5 insertions, 9 deletions

diff --git a/intern/audaspace/FX/AUD_LowpassFactory.cpp b/intern/audaspace/FX/AUD_LowpassFactory.cpp
index 9bc8d7cfe21..3ef25c3c16e 100644
--- a/intern/audaspace/FX/AUD_LowpassFactory.cpp
+++ b/intern/audaspace/FX/AUD_LowpassFactory.cpp
@@ -40,28 +40,24 @@
 
 AUD_LowpassFactory::AUD_LowpassFactory(AUD_Reference<AUD_IFactory> factory, float frequency,
 									   float Q) :
-		AUD_EffectFactory(factory),
+		AUD_DynamicIIRFilterFactory(factory),
 		m_frequency(frequency),
 		m_Q(Q)
 {
 }
 
-AUD_Reference<AUD_IReader> AUD_LowpassFactory::createReader()
+void AUD_LowpassFactory::recalculateCoefficients(AUD_SampleRate rate,
+												 std::vector<float> &b,
+												 std::vector<float> &a)
 {
-	AUD_Reference<AUD_IReader> reader = getReader();
-
-	// calculate coefficients
-	float w0 = 2 * M_PI * m_frequency / reader->getSpecs().rate;
+	float w0 = 2 * M_PI * m_frequency / rate;
 	float alpha = sin(w0) / (2 * m_Q);
 	float norm = 1 + alpha;
 	float c = cos(w0);
-	std::vector<float> a, b;
 	a.push_back(1);
 	a.push_back(-2 * c / norm);
 	a.push_back((1 - alpha) / norm);
 	b.push_back((1 - c) / (2 * norm));
 	b.push_back((1 - c) / norm);
 	b.push_back(b[0]);
-
-	return new AUD_IIRFilterReader(reader, b, a);
 }