+ boost::optional<float> sample_peak () const {
+ return _sample_peak;
+ }
+
+ boost::optional<DCPTime> sample_peak_time () const {
+ return _sample_peak_time;
+ }
+
+ boost::optional<float> true_peak () const {
+ return _true_peak;
+ }
+
+ boost::optional<float> integrated_loudness () const {
+ return _integrated_loudness;
+ }
+
+ boost::optional<float> loudness_range () const {
+ return _loudness_range;
+ }
+
+ boost::optional<double> analysis_gain () const {
+ return _analysis_gain;
+ }
+
+ void set_analysis_gain (double gain) {
+ _analysis_gain = gain;
+ }
+