+ boost::optional<float> _sample_peak;
+ boost::optional<DCPTime> _sample_peak_time;
+ boost::optional<float> _true_peak;
+ boost::optional<float> _integrated_loudness;
+ boost::optional<float> _loudness_range;
+ /** If this analysis was run on a single piece of
+ * content we store its gain in dB when the analysis
+ * happened.
+ */
+ boost::optional<double> _analysis_gain;