From b0834f33e972a6e7b0d234d09e420007943a136d Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Thu, 3 Sep 2015 13:52:10 +0100
Subject: Peak value of audio into the audio tab.

---
 src/lib/audio_analysis.cc | 19 +++++++++++++++++++
 src/lib/audio_analysis.h  |  4 ++++
 src/lib/job_manager.cc    |  2 +-
 src/lib/job_manager.h     |  2 +-
 4 files changed, 25 insertions(+), 2 deletions(-)

(limited to 'src/lib')

diff --git a/src/lib/audio_analysis.cc b/src/lib/audio_analysis.cc
index 6fcd97c94..10e022322 100644
--- a/src/lib/audio_analysis.cc
+++ b/src/lib/audio_analysis.cc
@@ -21,6 +21,8 @@
 #include "cross.h"
 #include "util.h"
 #include "raw_convert.h"
+#include "playlist.h"
+#include "audio_content.h"
 #include <libxml++/libxml++.h>
 #include <boost/filesystem.hpp>
 #include <boost/foreach.hpp>
@@ -38,6 +40,7 @@ using std::cout;
 using std::max;
 using std::list;
 using boost::shared_ptr;
+using boost::dynamic_pointer_cast;
 
 AudioAnalysis::AudioAnalysis (int channels)
 {
@@ -115,3 +118,19 @@ AudioAnalysis::write (boost::filesystem::path filename)
 
 	doc->write_to_file_formatted (filename.string ());
 }
+
+float
+AudioAnalysis::gain_correction (shared_ptr<const Playlist> playlist)
+{
+	if (playlist->content().size() == 1 && analysis_gain ()) {
+		/* In this case we know that the analysis was of a single piece of content and
+		   we know that content's gain when the analysis was run.  Hence we can work out
+		   what correction is now needed to make it look `right'.
+		*/
+		shared_ptr<const AudioContent> ac = dynamic_pointer_cast<const AudioContent> (playlist->content().front ());
+		DCPOMATIC_ASSERT (ac);
+		return ac->audio_gain() - analysis_gain().get ();
+	}
+
+	return 0.0f;
+}
diff --git a/src/lib/audio_analysis.h b/src/lib/audio_analysis.h
index 5e71705bf..0d06e5973 100644
--- a/src/lib/audio_analysis.h
+++ b/src/lib/audio_analysis.h
@@ -31,6 +31,8 @@ namespace xmlpp {
 	class Element;
 }
 
+class Playlist;
+
 class AudioAnalysis : public boost::noncopyable
 {
 public:
@@ -65,6 +67,8 @@ public:
 
 	void write (boost::filesystem::path);
 
+	float gain_correction (boost::shared_ptr<const Playlist> playlist);
+
 private:
 	std::vector<std::vector<AudioPoint> > _data;
 	boost::optional<float> _peak;
diff --git a/src/lib/job_manager.cc b/src/lib/job_manager.cc
index 3748fa353..0597983db 100644
--- a/src/lib/job_manager.cc
+++ b/src/lib/job_manager.cc
@@ -146,8 +146,8 @@ JobManager::scheduler ()
 		}
 
 		if (active_job != _last_active_job) {
+			emit (boost::bind (boost::ref (ActiveJobsChanged), _last_active_job, active_job));
 			_last_active_job = active_job;
-			emit (boost::bind (boost::ref (ActiveJobsChanged), active_job));
 		}
 
 		dcpomatic_sleep (1);
diff --git a/src/lib/job_manager.h b/src/lib/job_manager.h
index 7de7862a1..560b5ca66 100644
--- a/src/lib/job_manager.h
+++ b/src/lib/job_manager.h
@@ -53,7 +53,7 @@ public:
 		);
 
 	boost::signals2::signal<void (boost::weak_ptr<Job>)> JobAdded;
-	boost::signals2::signal<void (boost::optional<std::string>)> ActiveJobsChanged;
+	boost::signals2::signal<void (boost::optional<std::string>, boost::optional<std::string>)> ActiveJobsChanged;
 
 	static JobManager* instance ();
 	static void drop ();
-- 
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