Fixed FFT factory new plan allocation and effectively grab fftw-file option in the main parser

sdrbase/dsp/fftfactory.cpp

@@ -82,7 +82,7 @@ unsigned int FFTFactory::getEngine(unsigned int fftSize, bool inverse, FFTEngine
         engines.back().m_inUse = true;
         engines.back().m_engine = FFTEngine::create(m_fftwWisdomFileName);
         engines.back().m_engine->setReuse(false);
-        engines.back().m_engine->configure(fftSize, true);
+        engines.back().m_engine->configure(fftSize, inverse);
         *engine = engines.back().m_engine;
         return 0;
     }
@@ -112,7 +112,7 @@ unsigned int FFTFactory::getEngine(unsigned int fftSize, bool inverse, FFTEngine
             engines.back().m_inUse = true;
             engines.back().m_engine = FFTEngine::create(m_fftwWisdomFileName);
             engines.back().m_engine->setReuse(false);
-            engines.back().m_engine->configure(fftSize, true);
+            engines.back().m_engine->configure(fftSize, inverse);
             *engine = engines.back().m_engine;
             return engines.size() - 1;
         }

sdrbase/dsp/fftwengine.cpp

@@ -49,8 +49,25 @@ void FFTWEngine::configure(int n, bool inverse)
 	QTime t;
 	t.start();
     m_globalPlanMutex.lock();
+
+    if (m_fftWisdomFileName.size() > 0)
+    {
+        int rc = fftwf_import_wisdom_from_filename(m_fftWisdomFileName.toStdString().c_str());
+
+        if (rc == 0) { // that's an error (undocumented)
+            qInfo("FFTWEngine::configure: importing from FFTW wisdom file: '%s' failed", qPrintable(m_fftWisdomFileName));
+        } else {
+            qDebug("FFTWEngine::configure: successfully imported from FFTW wisdom file: '%s'", qPrintable(m_fftWisdomFileName));
+        }
+    }
+    else
+    {
+        qDebug("FFTWEngine::configure: no FFTW wisdom file");
+    }
+
 	m_currentPlan->plan = fftwf_plan_dft_1d(n, m_currentPlan->in, m_currentPlan->out, inverse ? FFTW_BACKWARD : FFTW_FORWARD, FFTW_PATIENT);
     m_globalPlanMutex.unlock();
+
     qDebug("FFT: creating FFTW plan (n=%d,%s) took %dms", n, inverse ? "inverse" : "forward", t.elapsed());
 	m_plans.push_back(m_currentPlan);
 }

sdrbase/mainparser.cpp

@@ -88,6 +88,10 @@ void MainParser::parse(const QCoreApplication& app)
         qWarning() << "MainParser::parse: server port invalid. Defaulting to " << m_serverPort;
     }
 
+    // FFTWF wisdom file
+
+    m_fftwfWindowFileName = m_parser.value(m_fftwfWisdomOption);
+
     // MIMO - from version
 
     QStringList versionParts = app.applicationVersion().split(".");