major internal plugin & processor API change:

[ardour.git] / libs / ardour / ardour / beats_frames_converter.h

diff --git a/libs/ardour/ardour/beats_frames_converter.h b/libs/ardour/ardour/beats_frames_converter.h
index 79972cb4c50a8522433b1b354bc261cab83ce0e3..4b7169bfe7edc7b5cbe36300d49696e80e0d079b 100644 (file)
--- a/libs/ardour/ardour/beats_frames_converter.h
+++ b/libs/ardour/ardour/beats_frames_converter.h
@@ -1,6 +1,6 @@
 /*
-    Copyright (C) 2009 Paul Davis 
-    Author: Dave Robillard
+    Copyright (C) 2009 Paul Davis
+    Author: David Robillard
 
     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
@@ -19,32 +19,55 @@
     $Id: midiregion.h 733 2006-08-01 17:19:38Z drobilla $
 */
 
-#include <evoral/TimeConverter.hpp>
-#include <ardour/types.h>
+#include "evoral/Beats.hpp"
+#include "evoral/TimeConverter.hpp"
+
+#include "ardour/libardour_visibility.h"
+#include "ardour/types.h"
 
 #ifndef __ardour_beats_frames_converter_h__
 #define __ardour_beats_frames_converter_h__
 
 namespace ARDOUR {
 
-class Session;
+class TempoMap;
+
+/** Converter between beats and frames.  Takes distances in beats or frames
+ *  from some origin (supplied to the constructor in frames), and converts
+ *  them to the opposite unit, taking tempo changes into account.
+ */
+class LIBARDOUR_API BeatsFramesConverter
+       : public Evoral::TimeConverter<Evoral::Beats,framepos_t> {
+public:
+       BeatsFramesConverter (TempoMap& tempo_map, framepos_t origin)
+               : Evoral::TimeConverter<Evoral::Beats, framepos_t> (origin)
+               , _tempo_map(tempo_map)
+       {}
+
+       framepos_t    to (Evoral::Beats beats) const;
+       Evoral::Beats from (framepos_t frames) const;
+
+private:
+       TempoMap& _tempo_map;
+};
 
-class BeatsFramesConverter : public Evoral::TimeConverter<double,nframes_t> {
+/** Converter between beats and frames.  Takes distances in beats or frames
+ *  from some origin (supplied to the constructor in frames), and converts
+ *  them to the opposite unit, taking tempo changes into account.
+ */
+class LIBARDOUR_API DoubleBeatsFramesConverter
+       : public Evoral::TimeConverter<double,framepos_t> {
 public:
-       BeatsFramesConverter(Session& session, nframes_t origin)
-               : _session(session)
-               , _origin(origin)
+       DoubleBeatsFramesConverter (TempoMap& tempo_map, framepos_t origin)
+               : Evoral::TimeConverter<double, framepos_t> (origin)
+               , _tempo_map(tempo_map)
        {}
-       
-       nframes_t to(double beats)       const;
-       double    from(nframes_t frames) const;
 
-       nframes_t origin() const              { return _origin; }
-       void     set_origin(nframes_t origin) { _origin = origin; }
+       framepos_t          to (double beats) const;
+       double from (framepos_t frames) const;
 
 private:
-       Session&  _session;
-       nframes_t _origin;
+       TempoMap& _tempo_map;
 };
 
 } /* namespace ARDOUR */