64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 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 "timeline.h"
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TimelineBlock::TimelineBlock() :
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current_block_(nullptr),
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attached_timeline_(nullptr)
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{
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}
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rational TimelineBlock::length()
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{
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return 0;
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}
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void TimelineBlock::Process(const rational &time)
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{
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// Run default process function
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Block::Process(time);
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// This node represents the end of the timeline, so if the time is beyond its start, there's no image to display
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if (time >= in()) {
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texture_output()->set_value(0);
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current_block_ = nullptr;
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return;
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}
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// If we're here, we need to find the current clip to display
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if (current_block_ == nullptr) {
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current_block_ = this;
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}
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// If the time requested is an earlier Block, traverse earlier until we find it
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while (time < current_block_->in()) {
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current_block_ = current_block_->previous();
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}
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// If the time requested is in a later Block, traverse later
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while (time >= current_block_->out()) {
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current_block_ = current_block_->next();
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}
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// At this point, we must have found the correct block so we use its texture output to produce the image
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texture_output()->set_value(current_block_->texture_output()->get_value(time));
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}
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