f4334277
 Hu Chunming
提交3rdparty
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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
//
// Copyright (C) 2020 Intel Corporation
#include <opencv2/gapi/rmat.hpp>
using View = cv::RMat::View;
namespace {
cv::GMatDesc checkDesc(const cv::GMatDesc& desc) {
if (!desc.dims.empty() && desc.chan != -1) {
cv::util::throw_error(
std::logic_error("Multidimesional RMat::Views with chan different from -1 are not supported!"));
}
return desc;
}
int typeFromDesc(const cv::GMatDesc& desc) {
// In multidimensional case GMatDesc::chan is -1,
// change it to 1 when calling CV_MAKE_TYPE
return CV_MAKE_TYPE(desc.depth, desc.chan == -1 ? 1 : desc.chan);
}
static View::stepsT defaultSteps(const cv::GMatDesc& desc) {
const auto& dims = desc.dims.empty()
? std::vector<int>{desc.size.height, desc.size.width}
: desc.dims;
View::stepsT steps(dims.size(), 0u);
auto type = typeFromDesc(desc);
steps.back() = CV_ELEM_SIZE(type);
for (int i = static_cast<int>(dims.size())-2; i >= 0; i--) {
steps[i] = steps[i+1]*dims[i];
}
return steps;
}
} // anonymous namespace
View::View(const cv::GMatDesc& desc, uchar* data, size_t step, DestroyCallback&& cb)
: m_desc(checkDesc(desc))
, m_data(data)
, m_steps([this, step](){
GAPI_Assert(m_desc.dims.empty());
auto steps = defaultSteps(m_desc);
if (step != 0u) {
steps[0] = step;
}
return steps;
}())
, m_cb(std::move(cb)) {
}
View::View(const cv::GMatDesc& desc, uchar* data, const stepsT &steps, DestroyCallback&& cb)
: m_desc(checkDesc(desc))
, m_data(data)
, m_steps(steps == stepsT{} ? defaultSteps(m_desc): steps)
, m_cb(std::move(cb)) {
}
int View::type() const { return typeFromDesc(m_desc); }
// There is an issue with default generated operator=(View&&) on Mac:
// it doesn't nullify m_cb of the moved object
View& View::operator=(View&& v) {
m_desc = v.m_desc;
m_data = v.m_data;
m_steps = v.m_steps;
m_cb = v.m_cb;
v.m_desc = {};
v.m_data = nullptr;
v.m_steps = {0u};
v.m_cb = nullptr;
return *this;
}
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