/*
- 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
$Id: midiregion.h 733 2006-08-01 17:19:38Z drobilla $
*/
-#include <ardour/audioengine.h>
-#include <ardour/beats_frames_converter.h>
-#include <ardour/session.h>
-#include <ardour/tempo.h>
+#include "pbd/stacktrace.h"
+
+#include "ardour/beats_frames_converter.h"
+#include "ardour/tempo.h"
namespace ARDOUR {
-sframes_t
-BeatsFramesConverter::to(double beats) const
+/** Takes a positive duration in quarter-note beats and considers it as a distance from the origin
+ * supplied to the constructor. Returns the equivalent number of frames,
+ * taking tempo changes into account.
+ */
+framepos_t
+BeatsFramesConverter::to (Evoral::Beats beats) const
{
- // FIXME: assumes tempo never changes after origin
- const Tempo& tempo = _session.tempo_map().tempo_at(_origin);
- const double frames_per_beat = tempo.frames_per_beat(
- _session.engine().frame_rate(),
- _session.tempo_map().meter_at(_origin));
+ if (beats < Evoral::Beats()) {
+ std::cerr << "negative beats passed to BFC: " << beats << std::endl;
+ PBD::stacktrace (std::cerr, 30);
+ return 0;
+ }
+ return _tempo_map.framepos_plus_qn (_origin_b, beats) - _origin_b;
+}
- return lrint(beats * frames_per_beat);
+/** Takes a duration in frames and considers it as a distance from the origin
+ * supplied to the constructor. Returns the equivalent number of quarter-note beats,
+ * taking tempo changes into account.
+ */
+Evoral::Beats
+BeatsFramesConverter::from (framepos_t frames) const
+{
+ return _tempo_map.framewalk_to_qn (_origin_b, frames);
}
-double
-BeatsFramesConverter::from(sframes_t frames) const
+/** As above, but with quarter-note beats in double instead (for GUI). */
+framepos_t
+DoubleBeatsFramesConverter::to (double beats) const
{
- // FIXME: assumes tempo never changes after origin
- const Tempo& tempo = _session.tempo_map().tempo_at(_origin);
- const double frames_per_beat = tempo.frames_per_beat(
- _session.engine().frame_rate(),
- _session.tempo_map().meter_at(_origin));
+ if (beats < 0.0) {
+ std::cerr << "negative beats passed to BFC: " << beats << std::endl;
+ PBD::stacktrace (std::cerr, 30);
+ return 0;
+ }
+ return _tempo_map.framepos_plus_qn (_origin_b, Evoral::Beats(beats)) - _origin_b;
+}
- return frames / frames_per_beat;
+/** As above, but with quarter-note beats in double instead (for GUI). */
+double
+DoubleBeatsFramesConverter::from (framepos_t frames) const
+{
+ return _tempo_map.framewalk_to_qn (_origin_b, frames).to_double();
}
} /* namespace ARDOUR */