From 4f726e02853e641d5c571d34d3b676d961ef244b Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Mon, 22 Dec 2014 17:36:24 +0000
Subject: [PATCH] - FirComplex: Added static process()

git-svn-id: http://moon:8086/svn/software/trunk/libsrc/cpp@105 b431acfa-c32f-4a4a-93f1-934dc6c82436
---
 radio/Equalizer.hpp  |  8 ++++----
 radio/FirComplex.hpp | 24 +++++++++++++++++-------
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/radio/Equalizer.hpp b/radio/Equalizer.hpp
index dc5aaea..e3f8400 100644
--- a/radio/Equalizer.hpp
+++ b/radio/Equalizer.hpp
@@ -71,7 +71,7 @@ public:
 
 	void update(ComplexScalar const &e, RealScalar const &mu)
 	{
-		m_w += m_x * conj(e) * mu;
+		m_w += m_state * conj(e) * mu;
 	}
 	
 private:
@@ -97,7 +97,7 @@ public:
 		RealScalar x1, x2;
 		
 		x1 = abs(x);
-		x2 = abs(m_x[m_numTaps-1]);
+		x2 = abs(m_state[m_numTaps-1]);
 		m_power = max(RealScalar(0), m_power + (x1*x1 - m_xLast));
 		m_xLast = x2*x2;		
 		
@@ -175,10 +175,10 @@ public:
 	ComplexScalar process(ComplexScalar const &xs, ComplexScalar const &xh)
 	{
 		int32_t i;
-		CVec &x = m_x;
+		CVec &x = m_state;
 		
 		// x(0:size-1) = [xs, x(0:m_numFeedforward-2), xh, x(m_numFeedforward:size-2)]
-		m_x.reverse() << m_x.segment(m_numFeedforward-1, m_numFeedBack).reverse(),xh,m_x.segment(0, m_numFeedforward-2).reverse(),xs;
+		m_state.reverse() << m_state.segment(m_numFeedforward-1, m_numFeedBack).reverse(),xh,m_state.segment(0, m_numFeedforward-2).reverse(),xs;
 
 		return FirComplex::process(m_w);
 	}
diff --git a/radio/FirComplex.hpp b/radio/FirComplex.hpp
index 70f3e98..c2f0c83 100644
--- a/radio/FirComplex.hpp
+++ b/radio/FirComplex.hpp
@@ -18,7 +18,7 @@ class FirComplex
 public:
 	FirComplex(uint32_t numTaps = 0)
 	: m_numTaps(numTaps)
-	, m_x(numTaps)
+	, m_state(numTaps)
 	{
 	}
 	virtual ~FirComplex()
@@ -29,28 +29,38 @@ public:
 	void setNumTaps(uint32_t numTaps)
 	{
 		m_numTaps = numTaps;
-		m_x.resize(numTaps);
-		m_x.fill(ComplexScalar(0,0));
+		m_state.resize(numTaps);
+		m_state.fill(ComplexScalar(0,0));
 	}
 	
 	void feed(ComplexScalar const &x)
 	{
-		m_x.reverse() << m_x.head(m_numTaps-1).reverse(), x;
+		m_state.reverse() << m_state.head(m_numTaps-1).reverse(), x;
+	}
+
+	static void feed(CVec &state, ComplexScalar const &x)
+	{
+		state.reverse() << state.head(state.size()-1).reverse(), x;
 	}
 
 	ComplexScalar process(CVec const &coeff)
 	{
-		return m_x.transpose() * coeff.conjugate();
+		return m_state.transpose() * coeff.conjugate();
 	}
 	
 	ComplexScalar processReal(RVec const &coeff)
 	{
-		return m_x.transpose() * coeff;
+		return m_state.transpose() * coeff;
+	}
+
+	static ComplexScalar processReal(CVec const &state, RVec const &coeff)
+	{
+		return state.transpose() * coeff;
 	}
 
 protected:
 	uint32_t m_numTaps;
-	CVec m_x;
+	CVec m_state;
 	
 };