2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>
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4 * This file is part of CasparCG.
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6 * CasparCG is free software: you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation, either version 3 of the License, or
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9 * (at your option) any later version.
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11 * CasparCG is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
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20 #include "../../stdafx.h"
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22 #include "audio_transform.h"
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24 namespace caspar { namespace core {
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26 audio_transform::audio_transform()
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28 , has_audio_(true){}
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30 void audio_transform::set_volume(double value)
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32 volume_ = std::max(0.0, value);
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35 double audio_transform::get_volume() const
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40 void audio_transform::set_has_audio(bool value)
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45 bool audio_transform::get_has_audio() const
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50 audio_transform& audio_transform::operator*=(const audio_transform &other)
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52 volume_ *= other.volume_;
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53 has_audio_ &= other.has_audio_;
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57 const audio_transform audio_transform::operator*(const audio_transform &other) const
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59 return audio_transform(*this) *= other;
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62 audio_transform tween(double time, const audio_transform& source, const audio_transform& dest, double duration, const tweener_t& tweener)
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64 auto do_tween = [](double time, double source, double dest, double duration, const tweener_t& tweener)
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66 return tweener(time, source, dest-source, duration);
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69 audio_transform result;
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70 result.set_volume(do_tween(time, source.get_volume(), dest.get_volume(), duration, tweener));
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71 result.set_has_audio(source.get_has_audio() || dest.get_has_audio());
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