Merge with trunk R2978.

git-svn-id: svn://localhost/ardour2/branches/3.0@2988 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 74 insertions, 0 deletions

diff --git a/libs/ardour/ardour/audioanalyser.h b/libs/ardour/ardour/audioanalyser.h
new file mode 100644
index 0000000000..dbd8a52d5a
--- /dev/null
+++ b/libs/ardour/ardour/audioanalyser.h
@@ -0,0 +1,74 @@
+/*
+    Copyright (C) 2008 Paul Davis 
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __ardour_audioanalyser_h__
+#define __ardour_audioanalyser_h__
+
+#include <vector>
+#include <string>
+#include <ostream>
+#include <fstream>
+#include <vamp-sdk/Plugin.h>
+#include <ardour/audioregion.h>
+
+namespace ARDOUR {
+
+class Readable;
+class Session;
+
+class AudioAnalyser {
+
+  public:
+	typedef Vamp::Plugin AnalysisPlugin;
+	typedef std::string AnalysisPluginKey;
+
+	AudioAnalyser (float sample_rate, AnalysisPluginKey key);
+	virtual ~AudioAnalyser();
+
+	/* analysis object should provide a run method
+	   that accepts a path to write the results to (optionally empty)
+	   a Readable* to read data from
+	   and a reference to a type-specific container to return the
+	   results.
+	*/
+
+	void reset ();
+
+  protected:
+	float sample_rate;
+	AnalysisPlugin* plugin;
+	AnalysisPluginKey plugin_key;
+
+	nframes64_t bufsize;
+	nframes64_t stepsize;
+	
+	int initialize_plugin (AnalysisPluginKey name, float sample_rate);
+	int analyse (const std::string& path, Readable*, uint32_t channel);
+
+	/* instances of an analysis object will have this method called
+	   whenever there are results to process. if out is non-null,
+	   the data should be written to the stream it points to.
+	*/
+
+	virtual int use_features (Vamp::Plugin::FeatureSet&, std::ostream*) = 0;
+};
+
+} /* namespace */
+
+#endif /* __ardour_audioanalyser_h__ */