46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2021 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "viewerplaybacktimer.h"
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#include <QDateTime>
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#include <QtMath>
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namespace olive {
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void ViewerPlaybackTimer::Start(const int64_t &start_timestamp, const int &playback_speed, const double &timebase)
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{
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start_msec_ = QDateTime::currentMSecsSinceEpoch();
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start_timestamp_ = start_timestamp;
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playback_speed_ = playback_speed;
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timebase_ = timebase * 1000;
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}
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int64_t ViewerPlaybackTimer::GetTimestampNow() const
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{
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int64_t real_time = QDateTime::currentMSecsSinceEpoch() - start_msec_;
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int64_t frames_since_start = qFloor(static_cast<double>(real_time) / (timebase_));
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return start_timestamp_ + frames_since_start * playback_speed_;
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}
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}
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