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/*
* Copyright (C) 2017 Paul Davis <paul@linuxaudiosystems.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "pbd/stacktrace.h"
#include "ardour/beats_samples_converter.h"
#include "ardour/tempo.h"
namespace ARDOUR {
/** 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 samples,
* taking tempo changes into account.
*/
samplepos_t
BeatsSamplesConverter::to (Temporal::Beats beats) const
{
if (beats < Temporal::Beats()) {
std::cerr << "negative beats passed to BFC: " << beats << std::endl;
PBD::stacktrace (std::cerr, 30);
return 0;
}
return _tempo_map.samplepos_plus_qn (_origin_b, beats) - _origin_b;
}
/** Takes a duration in samples 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.
*/
Temporal::Beats
BeatsSamplesConverter::from (samplepos_t samples) const
{
return _tempo_map.framewalk_to_qn (_origin_b, samples);
}
/** As above, but with quarter-note beats in double instead (for GUI). */
samplepos_t
DoubleBeatsSamplesConverter::to (double beats) const
{
if (beats < 0.0) {
std::cerr << "negative beats passed to BFC: " << beats << std::endl;
PBD::stacktrace (std::cerr, 30);
return 0;
}
return _tempo_map.samplepos_plus_qn (_origin_b, Temporal::Beats(beats)) - _origin_b;
}
/** As above, but with quarter-note beats in double instead (for GUI). */
double
DoubleBeatsSamplesConverter::from (samplepos_t samples) const
{
return _tempo_map.framewalk_to_qn (_origin_b, samples).to_double();
}
} /* namespace ARDOUR */
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