Add time axis to audio analysis (part of #1082).

3 files changed, 32 insertions, 2 deletions

diff --git a/src/lib/analyse_audio_job.cc b/src/lib/analyse_audio_job.cc
index b96c7047b..db917301a 100644
--- a/src/lib/analyse_audio_job.cc
+++ b/src/lib/analyse_audio_job.cc
@@ -163,6 +163,8 @@ AnalyseAudioJob::run ()
 		_analysis->set_analysis_gain (ac->gain ());
 	}
 
+	_analysis->set_samples_per_point (_samples_per_point);
+	_analysis->set_sample_rate (_film->audio_frame_rate ());
 	_analysis->write (_film->audio_analysis_path (_playlist));
 
 	set_progress (1);
diff --git a/src/lib/audio_analysis.cc b/src/lib/audio_analysis.cc
index 61cdd5fcc..b58a3127d 100644
--- a/src/lib/audio_analysis.cc
+++ b/src/lib/audio_analysis.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2018 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -90,6 +90,8 @@ AudioAnalysis::AudioAnalysis (boost::filesystem::path filename)
 	_loudness_range = f.optional_number_child<float> ("LoudnessRange");
 
 	_analysis_gain = f.optional_number_child<double> ("AnalysisGain");
+	_samples_per_point = f.optional_number_child<int64_t> ("SamplesPerPoint");
+	_sample_rate = f.optional_number_child<int64_t> ("SampleRate");
 }
 
 void
@@ -156,6 +158,14 @@ AudioAnalysis::write (boost::filesystem::path filename)
 		root->add_child("AnalysisGain")->add_child_text (raw_convert<string> (_analysis_gain.get ()));
 	}
 
+	if (_samples_per_point) {
+		root->add_child("SamplesPerPoint")->add_child_text (raw_convert<string> (_samples_per_point.get()));
+	}
+
+	if (_sample_rate) {
+		root->add_child("SampleRate")->add_child_text (raw_convert<string> (_sample_rate.get()));
+	}
+
 	doc->write_to_file_formatted (filename.string ());
 }
 
diff --git a/src/lib/audio_analysis.h b/src/lib/audio_analysis.h
index 6da651c95..0a5e6194d 100644
--- a/src/lib/audio_analysis.h
+++ b/src/lib/audio_analysis.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2018 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -100,6 +100,22 @@ public:
 		_analysis_gain = gain;
 	}
 
+	boost::optional<int64_t> samples_per_point () const {
+		return _samples_per_point;
+	}
+
+	void set_samples_per_point (int64_t spp) {
+		_samples_per_point = spp;
+	}
+
+	boost::optional<int> sample_rate () const {
+		return _sample_rate;
+	}
+
+	void set_sample_rate (int sr) {
+		_sample_rate = sr;
+	}
+
 	void write (boost::filesystem::path);
 
 	float gain_correction (boost::shared_ptr<const Playlist> playlist);
@@ -115,6 +131,8 @@ private:
 	 *  happened.
 	 */
 	boost::optional<double> _analysis_gain;
+	boost::optional<int64_t> _samples_per_point;
+	boost::optional<int> _sample_rate;
 
 	static int const _current_state_version;
 };