diff --git a/src/source.cpp b/src/source.cpp
new file mode 100644
--- /dev/null
+++ b/src/source.cpp
@@ -0,0 +1,79 @@
+/*
+  Copyright © 2018 Hasan Yavuz Özderya
+
+  This file is part of serialplot.
+
+  serialplot is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  serialplot is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <QtGlobal>
+
+#include "source.h"
+
+Source::~Source()
+{
+    for (auto sink : sinks)
+    {
+        sink->setSource(nullptr);
+    }
+}
+
+void Source::connectSink(Sink* sink)
+{
+    Q_ASSERT(!sinks.contains(sink));
+
+    auto prevSource = sink->connectedSource();
+    if (prevSource != nullptr)
+    {
+        prevSource->disconnect(sink);
+    }
+
+    sinks.append(sink);
+    sink->setSource(this);
+    sink->setNumChannels(numChannels(), hasX());
+}
+
+void Source::disconnect(Sink* sink)
+{
+    Q_ASSERT(sinks.contains(sink));
+    Q_ASSERT(sink->connectedSource() == this);
+
+    sink->setSource(nullptr);
+    sinks.removeOne(sink);
+}
+
+void Source::disconnectSinks()
+{
+    while (!sinks.isEmpty())
+    {
+        auto sink = sinks.takeFirst();
+        sink->setSource(nullptr);
+    }
+}
+
+void Source::feedOut(const SamplePack& data) const
+{
+    for (auto sink : sinks)
+    {
+        sink->feedIn(data);
+    }
+}
+
+void Source::updateNumChannels() const
+{
+    for (auto sink : sinks)
+    {
+        sink->setNumChannels(numChannels(), hasX());
+    }
+}