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diff --git a/src/PadInterface.h b/src/PadInterface.h
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+/* ------------------------------------------------------------------
+ * Copyright (C) 2020 Matthias P. Braendli
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+
+#pragma once
+#include <string>
+#include <vector>
+#include <cstdint>
+#include <cstddef>
+#include <cstdio>
+
+/*! \file PadInterface.h
+ *
+ * Handles communication with ODR-PadEnc using a socket
+ */
+
+class PadInterface {
+    public:
+        /*! Create a new PAD data interface that binds to /tmp/pad_ident.audioenc and
+         * communicates with ODR-PadEnc at /tmp/pad_ident.padenc
+         */
+        void open(const std::string &pad_ident);
+
+        std::vector<uint8_t> request(uint8_t padlen);
+
+    private:
+        std::string m_pad_ident;
+        int m_sock = -1;
+        bool m_padenc_reachable = true;
+};