Split audio analysis code off from the job.

1 files changed, 81 insertions, 0 deletions

diff --git a/src/lib/audio_analyser.h b/src/lib/audio_analyser.h
new file mode 100644
index 000000000..e47ab94b4
--- /dev/null
+++ b/src/lib/audio_analyser.h
@@ -0,0 +1,81 @@
+/*
+    Copyright (C) 2021 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "audio_analysis.h"
+#include "dcpomatic_time.h"
+#include "types.h"
+#include <leqm_nrt.h>
+#include <boost/scoped_ptr.hpp>
+#include <memory>
+
+
+class AudioAnalysis;
+class AudioBuffers;
+class AudioFilterGraph;
+class AudioPoint;
+class Film;
+class Filter;
+class Playlist;
+
+
+class AudioAnalyser
+{
+public:
+	AudioAnalyser (std::shared_ptr<const Film> film, std::shared_ptr<const Playlist> playlist, bool from_zero, std::function<void (float)> set_progress);
+	~AudioAnalyser ();
+
+	AudioAnalyser (AudioAnalyser const&) = delete;
+	AudioAnalyser& operator= (AudioAnalyser const&) = delete;
+
+	void analyse (std::shared_ptr<const AudioBuffers>, dcpomatic::DCPTime time);
+
+	dcpomatic::DCPTime start () const {
+		return _start;
+	}
+
+	void finish ();
+
+	AudioAnalysis get () const {
+		return _analysis;
+	}
+
+private:
+	std::shared_ptr<const Film> _film;
+	std::shared_ptr<const Playlist> _playlist;
+
+	std::function<void (float)> _set_progress;
+
+	dcpomatic::DCPTime _start;
+#ifdef DCPOMATIC_HAVE_EBUR128_PATCHED_FFMPEG
+	std::shared_ptr<AudioFilterGraph> _ebur128;
+#endif
+	std::vector<Filter const *> _filters;
+	Frame _samples_per_point = 1;
+
+	boost::scoped_ptr<leqm_nrt::Calculator> _leqm;
+	Frame _done = 0;
+	float* _sample_peak = nullptr;
+	Frame* _sample_peak_frame = nullptr;
+	AudioPoint* _current = nullptr;
+
+	AudioAnalysis _analysis;
+};
+