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diff --git a/src/djinterop/enginelibrary/performance_data_format.hpp b/src/djinterop/enginelibrary/performance_data_format.hpp
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+++ b/src/djinterop/enginelibrary/performance_data_format.hpp
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+/*
+    This file is part of libdjinterop.
+
+    libdjinterop is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    libdjinterop 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with libdjinterop.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#if __cplusplus < 201402L && _MSVC_LANG < 201402L
+#error This library needs at least a C++14 compliant compiler
+#endif
+
+#ifndef DJINTEROP_ENGINELIBRARY_PERFORMANCE_DATA_FORMAT_HPP
+#define DJINTEROP_ENGINELIBRARY_PERFORMANCE_DATA_FORMAT_HPP
+
+#include <cstdint>
+#include <vector>
+
+#include <boost/optional.hpp>
+
+#include <djinterop/performance_data.hpp>
+
+namespace djinterop
+{
+namespace enginelibrary
+{
+struct beat_data
+{
+    beat_data() noexcept = default;
+
+    boost::optional<sampling_info> sampling;
+    std::vector<beatgrid_marker> default_beatgrid;
+    std::vector<beatgrid_marker> adjusted_beatgrid;
+
+    std::vector<char> encode() const;
+    static beat_data decode(const std::vector<char>& compressed_data);
+};
+
+struct high_res_waveform_data
+{
+    high_res_waveform_data() noexcept = default;
+
+    double samples_per_entry;
+    std::vector<waveform_entry> waveform;
+
+    std::vector<char> encode() const;
+    static high_res_waveform_data decode(
+        const std::vector<char>& compressed_data);
+};
+
+struct loops_data
+{
+    loops_data() = default;
+
+    std::array<boost::optional<loop>, 8> loops;  // Don't use curly braces here!
+
+    std::vector<char> encode() const;
+    static loops_data decode(
+        const std::vector<char>& raw_data);  // not compressed
+};
+
+struct overview_waveform_data
+{
+    overview_waveform_data() noexcept = default;
+
+    double samples_per_entry;
+    std::vector<waveform_entry> waveform;
+
+    std::vector<char> encode() const;
+    static overview_waveform_data decode(
+        const std::vector<char>& compressed_data);
+};
+
+struct quick_cues_data
+{
+    quick_cues_data() = default;
+
+    std::array<boost::optional<hot_cue>, 8> hot_cues;
+    double adjusted_main_cue = 0;
+    double default_main_cue = 0;
+
+    std::vector<char> encode() const;
+
+    static quick_cues_data decode(const std::vector<char>& compressed_data);
+};
+
+struct track_data
+{
+    track_data() noexcept = default;
+
+    boost::optional<sampling_info> sampling;
+    boost::optional<double> average_loudness;  // range (0, 1]
+    boost::optional<musical_key> key;
+
+    std::vector<char> encode() const;
+
+    static track_data decode(const std::vector<char>& compressed_data);
+};
+
+}  // namespace enginelibrary
+}  // namespace djinterop
+
+#endif  // DJINTEROP_ENGINELIBRARY_PERFORMANCE_DATA_FORMAT_HPP