direct sampling support

plugins/samplesource/rtlsdr/rtlsdrgui.cpp

@@ -152,3 +152,34 @@ void RTLSDRGui::updateHardware()
 	message->submit(m_pluginAPI->getDSPEngineMessageQueue());
 	m_updateTimer.stop();
 }
+
+void RTLSDRGui::on_checkBox_stateChanged(int state) {
+	if (state == Qt::Checked){
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode((ui->radioButton->isChecked()) ? true : false);
+		ui->radioButton->setEnabled(true);
+		ui->radioButton_2->setEnabled(true);
+		ui->gain->setEnabled(false);
+		//ui->decimation->setMaximum(6);
+
+		ui->centerFrequency->setValueRange(5, 0U, 30000U);
+		ui->centerFrequency->setValue(0);
+	}
+	else {
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode(0);
+		ui->radioButton->setEnabled(false);
+		ui->radioButton_2->setEnabled(false);
+		ui->gain->setEnabled(true);
+		//ui->decimation->setMaximum(4);
+
+		ui->centerFrequency->setValueRange(7, 20000U, 2200000U);
+	}
+}
+
+void RTLSDRGui::on_radioButton_toggled(bool checked){
+	if (checked)
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode(1);
+}
+void RTLSDRGui::on_radioButton_2_toggled(bool checked){
+	if (checked)
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode(2);
+}

plugins/samplesource/rtlsdr/rtlsdrgui.h

@@ -46,6 +46,9 @@ private slots:
 	void on_centerFrequency_changed(quint64 value);
 	void on_gain_valueChanged(int value);
 	void on_decimation_valueChanged(int value);
+	void on_checkBox_stateChanged(int state);
+	void on_radioButton_toggled(bool checked);
+	void on_radioButton_2_toggled(bool checked);
 
 	void updateHardware();
 };

plugins/samplesource/rtlsdr/rtlsdrgui.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>132</width>
-    <height>82</height>
+    <height>119</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -214,6 +214,63 @@
      </item>
     </layout>
    </item>
+   <item>
+    <widget class="Line" name="line">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QCheckBox" name="checkBox">
+       <property name="text">
+        <string>ds</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QRadioButton" name="radioButton">
+       <property name="enabled">
+        <bool>false</bool>
+       </property>
+       <property name="text">
+        <string>i</string>
+       </property>
+       <property name="checkable">
+        <bool>true</bool>
+       </property>
+       <property name="checked">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QRadioButton" name="radioButton_2">
+       <property name="enabled">
+        <bool>false</bool>
+       </property>
+       <property name="text">
+        <string>q</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer_3">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
   </layout>
  </widget>
  <customwidgets>

plugins/samplesource/rtlsdr/rtlsdrinput.cpp

@@ -228,3 +228,8 @@ bool RTLSDRInput::applySettings(const GeneralSettings& generalSettings, const Se
 	}
 	return true;
 }
+
+
+void RTLSDRInput::set_ds_mode(int on){
+	rtlsdr_set_direct_sampling(m_dev, on);
+}

plugins/samplesource/rtlsdr/rtlsdrinput.h

@@ -91,6 +91,9 @@ public:
 
 	bool handleMessage(Message* message);
 
+
+	void set_ds_mode(int on);
+
 private:
 	QMutex m_mutex;
 	Settings m_settings;

sdrbase/dsp/fftwengine.cpp

@@ -5,6 +5,13 @@ FFTWEngine::FFTWEngine() :
 	m_plans(),
 	m_currentPlan(NULL)
 {
+	configure(128, false);
+	configure(256, false);
+	configure(512, false);
+	configure(1024, false);
+	configure(2048, false);
+	configure(4096, false);
+	configure(8192, false);
 }
 
 FFTWEngine::~FFTWEngine()

sdrbase/dsp/samplefifo.cpp

@@ -69,8 +69,6 @@ bool SampleFifo::setSize(int size)
 
 uint SampleFifo::write(const quint8* data, uint count)
 {
-	return write(SampleVector::const_iterator((Sample*)data), SampleVector::const_iterator((Sample*)(data + count)));
-#if 0
 	QMutexLocker mutexLocker(&m_mutex);
 	uint total;
 	uint remaining;
@@ -78,8 +76,6 @@ uint SampleFifo::write(const quint8* data, uint count)
 	const Sample* begin = (const Sample*)data;
 	count /= sizeof(Sample);
 
-	//qDebug("write pre count %d %u", count, m_fill);
-
 	total = MIN(count, m_size - m_fill);
 	if(total < count) {
 		if(m_suppressed < 0) {
@@ -100,22 +96,17 @@ uint SampleFifo::write(const quint8* data, uint count)
 	remaining = total;
 	while(remaining > 0) {
 		len = MIN(remaining, m_size - m_tail);
-		//qDebug("write remaining %u, len %u", remaining, len);
 		std::copy(begin, begin + len, m_data.begin() + m_tail);
-		m_tail += len;
-		m_tail %= m_size;
+		m_tail = (m_tail + len) % m_size;
 		m_fill += len;
 		begin += len;
 		remaining -= len;
 	}
 
-	//qDebug("write post count %d %u [%u;%u]", count, m_fill, m_head, m_tail);
-
 	if(m_fill > 0)
 		emit dataReady();
 
 	return total;
-#endif
 }
 
 uint SampleFifo::write(SampleVector::const_iterator begin, SampleVector::const_iterator end)