98 lines
2.1 KiB
C++
98 lines
2.1 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 "framepool.h"
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OLIVE_NAMESPACE_ENTER
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FramePool::FramePool()
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{
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data_ = nullptr;
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}
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bool FramePool::Allocate(int width, int height, PixelFormat::Format format, int nb_elements)
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{
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delete [] data_;
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element_sz_ = width * height * PixelFormat::BytesPerPixel(format);
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if ((data_ = new char[element_sz_ * nb_elements])) {
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// Only allocate available array if data allocation succeeded
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available_.resize(nb_elements);
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available_.fill(true);
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return true;
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} else {
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available_.clear();
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return false;
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}
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}
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void FramePool::Destroy()
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{
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delete [] data_;
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available_.clear();
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}
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FramePool::~FramePool()
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{
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delete [] data_;
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}
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FramePool::ElementPtr FramePool::Get()
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{
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for (int i=0;i<available_.size();i++) {
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if (available_.at(i)) {
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// This buffer is available
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available_.replace(i, false);
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return std::make_shared<Element>(this, data_ + i * element_sz_);
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}
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}
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return nullptr;
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}
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void FramePool::Release(FramePool::Element *e)
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{
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quintptr offs = reinterpret_cast<quintptr>(e->data());
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quintptr start = reinterpret_cast<quintptr>(data_);
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quintptr diff = offs - start;
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int index = diff / element_sz_;
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available_.replace(index, true);
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}
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FramePool::Element::Element(FramePool *parent, char *data)
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{
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parent_ = parent;
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data_ = data;
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accessed_ = QDateTime::currentMSecsSinceEpoch();
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}
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FramePool::Element::~Element()
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{
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parent_->Release(this);
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}
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OLIVE_NAMESPACE_EXIT
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