Use even/odd FIR filter half band interpolator only if SIMD is available

sdrbase/dsp/upchannelizer.cpp

@@ -201,6 +201,7 @@ void UpChannelizer::applyConfiguration()
     }
 }
 
+#ifdef USE_SIMD
 UpChannelizer::FilterStage::FilterStage(Mode mode) :
     m_filter(new IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>),
     m_workFunction(0)
@@ -219,6 +220,26 @@ UpChannelizer::FilterStage::FilterStage(Mode mode) :
             break;
     }
 }
+#else
+UpChannelizer::FilterStage::FilterStage(Mode mode) :
+    m_filter(new IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>),
+    m_workFunction(0)
+{
+    switch(mode) {
+        case ModeCenter:
+            m_workFunction = &IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateCenter;
+            break;
+
+        case ModeLowerHalf:
+            m_workFunction = &IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateLowerHalf;
+            break;
+
+        case ModeUpperHalf:
+            m_workFunction = &IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>::workInterpolateUpperHalf;
+            break;
+    }
+}
+#endif
 
 UpChannelizer::FilterStage::~FilterStage()
 {

sdrbase/dsp/upchannelizer.h

@@ -23,7 +23,11 @@
 #include <QMutex>
 #include "util/export.h"
 #include "util/message.h"
+#ifdef USE_SIMD
 #include "dsp/inthalfbandfiltereo1.h"
+#else
+#include "dsp/inthalfbandfilterdb.h"
+#endif
 
 #define UPCHANNELIZER_HB_FILTER_ORDER 96
 
@@ -69,8 +73,13 @@ protected:
             ModeUpperHalf
         };
 
+#ifdef USE_SIMD
         typedef bool (IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>::*WorkFunction)(Sample* sIn, Sample *sOut);
         IntHalfbandFilterEO1<UPCHANNELIZER_HB_FILTER_ORDER>* m_filter;
+#else
+        typedef bool (IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>::*WorkFunction)(Sample* sIn, Sample *sOut);
+        IntHalfbandFilterDB<UPCHANNELIZER_HB_FILTER_ORDER>* m_filter;
+#endif
         WorkFunction m_workFunction;
 
         FilterStage(Mode mode);