diff --git a/src/samplepack.h b/src/samplepack.h
new file mode 100644
--- /dev/null
+++ b/src/samplepack.h
@@ -0,0 +1,49 @@
+/*
+  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/>.
+*/
+
+#ifndef SAMPLEPACK_H
+#define SAMPLEPACK_H
+
+class SamplePack
+{
+public:
+    /**
+     * @param ns number of samples
+     * @param nc number of channels
+     * @param x has X channel
+     */
+    SamplePack(unsigned ns, unsigned nc, bool x = false);
+    ~SamplePack();
+
+    bool hasX() const;
+    unsigned numChannels() const;
+    unsigned numSamples() const;
+    double* xData() const;
+    double* data(unsigned channel) const;
+
+    double* xData();
+    double* data(unsigned channel);
+
+private:
+    unsigned _numSamples, _numChannels;
+    double* _xData;
+    double* _yData;
+};
+
+#endif // SAMPLEPACK_H