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280 lines
8.3 KiB
C++
280 lines
8.3 KiB
C++
// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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//
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// Copyright (C) 2018-2020 Intel Corporation
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#ifndef OPENCV_GAPI_GMAT_HPP
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#define OPENCV_GAPI_GMAT_HPP
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#include <ostream>
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#include <memory> // std::shared_ptr
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#include <opencv2/gapi/opencv_includes.hpp>
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#include <opencv2/gapi/gcommon.hpp> // GShape
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#include <opencv2/gapi/own/assert.hpp>
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// TODO GAPI_EXPORTS or so
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namespace cv
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{
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// Forward declaration; GNode and GOrigin are an internal
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// (user-inaccessible) classes.
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class GNode;
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struct GOrigin;
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/** \addtogroup gapi_data_objects
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* @{
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*
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* @brief G-API data objects used to build G-API expressions.
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*
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* These objects do not own any particular data (except compile-time
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* associated values like with cv::GScalar or `cv::GArray<T>`) and are
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* used only to construct graphs.
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*
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* Every graph in G-API starts and ends with data objects.
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*
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* Once constructed and compiled, G-API operates with regular host-side
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* data instead. Refer to the below table to find the mapping between
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* G-API and regular data types when passing input and output data
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* structures to G-API:
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*
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* G-API data type | I/O data type
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* ------------------ | -------------
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* cv::GMat | cv::Mat, cv::UMat, cv::RMat
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* cv::GScalar | cv::Scalar
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* `cv::GArray<T>` | std::vector<T>
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* `cv::GOpaque<T>` | T
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* cv::GFrame | cv::MediaFrame
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*/
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/**
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* @brief GMat class represents image or tensor data in the
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* graph.
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*
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* GMat doesn't store any data itself, instead it describes a
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* functional relationship between operations consuming and producing
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* GMat objects.
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*
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* GMat is a virtual counterpart of Mat and UMat, but it
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* doesn't mean G-API use Mat or UMat objects internally to represent
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* GMat objects -- the internal data representation may be
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* backend-specific or optimized out at all.
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*
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* @sa Mat, GMatDesc
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*/
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class GAPI_EXPORTS_W_SIMPLE GMat
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{
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public:
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/**
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* @brief Constructs an empty GMat
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*
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* Normally, empty G-API data objects denote a starting point of
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* the graph. When an empty GMat is assigned to a result of some
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* operation, it obtains a functional link to this operation (and
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* is not empty anymore).
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*/
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GAPI_WRAP GMat(); // Empty constructor
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/// @private
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GMat(const GNode &n, std::size_t out); // Operation result constructor
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/// @private
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GOrigin& priv(); // Internal use only
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/// @private
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const GOrigin& priv() const; // Internal use only
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private:
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std::shared_ptr<GOrigin> m_priv;
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};
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class GAPI_EXPORTS GMatP : public GMat
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{
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public:
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using GMat::GMat;
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};
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class RMat;
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/** @} */
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/**
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* \addtogroup gapi_meta_args
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* @{
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*/
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struct GAPI_EXPORTS_W_SIMPLE GMatDesc
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{
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// FIXME: Default initializers in C++14
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GAPI_PROP int depth;
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GAPI_PROP int chan;
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GAPI_PROP cv::Size size; // NB.: no multi-dimensional cases covered yet
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GAPI_PROP bool planar;
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GAPI_PROP std::vector<int> dims; // FIXME: Maybe it's real questionable to have it here
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GAPI_WRAP GMatDesc(int d, int c, cv::Size s, bool p = false)
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: depth(d), chan(c), size(s), planar(p) {}
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GAPI_WRAP GMatDesc(int d, const std::vector<int> &dd)
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: depth(d), chan(-1), size{-1,-1}, planar(false), dims(dd) {}
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GAPI_WRAP GMatDesc(int d, std::vector<int> &&dd)
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: depth(d), chan(-1), size{-1,-1}, planar(false), dims(std::move(dd)) {}
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GAPI_WRAP GMatDesc() : GMatDesc(-1, -1, {-1,-1}) {}
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inline bool operator== (const GMatDesc &rhs) const
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{
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return depth == rhs.depth
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&& chan == rhs.chan
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&& size == rhs.size
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&& planar == rhs.planar
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&& dims == rhs.dims;
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}
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inline bool operator!= (const GMatDesc &rhs) const
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{
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return !(*this == rhs);
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}
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bool isND() const { return !dims.empty(); }
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// Checks if the passed mat can be described by this descriptor
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// (it handles the case when
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// 1-channel mat can be reinterpreted as is (1-channel mat)
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// and as a 3-channel planar mat with height divided by 3)
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bool canDescribe(const cv::Mat& mat) const;
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bool canDescribe(const cv::RMat& mat) const;
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// Meta combinator: return a new GMatDesc which differs in size by delta
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// (all other fields are taken unchanged from this GMatDesc)
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// FIXME: a better name?
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GAPI_WRAP GMatDesc withSizeDelta(cv::Size delta) const
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{
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GMatDesc desc(*this);
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desc.size += delta;
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return desc;
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}
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// Meta combinator: return a new GMatDesc which differs in size by delta
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// (all other fields are taken unchanged from this GMatDesc)
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//
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// This is an overload.
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GAPI_WRAP GMatDesc withSizeDelta(int dx, int dy) const
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{
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return withSizeDelta(cv::Size{dx,dy});
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}
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GAPI_WRAP GMatDesc withSize(cv::Size sz) const
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{
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GMatDesc desc(*this);
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desc.size = sz;
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return desc;
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}
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// Meta combinator: return a new GMatDesc with specified data depth.
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// (all other fields are taken unchanged from this GMatDesc)
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GAPI_WRAP GMatDesc withDepth(int ddepth) const
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{
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GAPI_Assert(CV_MAT_CN(ddepth) == 1 || ddepth == -1);
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GMatDesc desc(*this);
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if (ddepth != -1) desc.depth = ddepth;
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return desc;
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}
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// Meta combinator: return a new GMatDesc with specified data depth
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// and number of channels.
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// (all other fields are taken unchanged from this GMatDesc)
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GAPI_WRAP GMatDesc withType(int ddepth, int dchan) const
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{
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GAPI_Assert(CV_MAT_CN(ddepth) == 1 || ddepth == -1);
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GMatDesc desc = withDepth(ddepth);
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desc.chan = dchan;
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return desc;
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}
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// Meta combinator: return a new GMatDesc with planar flag set
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// (no size changes are performed, only channel interpretation is changed
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// (interleaved -> planar)
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GAPI_WRAP GMatDesc asPlanar() const
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{
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GAPI_Assert(planar == false);
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GMatDesc desc(*this);
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desc.planar = true;
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return desc;
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}
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// Meta combinator: return a new GMatDesc
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// reinterpreting 1-channel input as planar image
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// (size height is divided by plane number)
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GAPI_WRAP GMatDesc asPlanar(int planes) const
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{
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GAPI_Assert(planar == false);
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GAPI_Assert(chan == 1);
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GAPI_Assert(planes > 1);
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GAPI_Assert(size.height % planes == 0);
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GMatDesc desc(*this);
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desc.size.height /= planes;
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desc.chan = planes;
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return desc.asPlanar();
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}
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// Meta combinator: return a new GMatDesc with planar flag set to false
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// (no size changes are performed, only channel interpretation is changed
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// (planar -> interleaved)
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GAPI_WRAP GMatDesc asInterleaved() const
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{
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GAPI_Assert(planar == true);
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GMatDesc desc(*this);
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desc.planar = false;
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return desc;
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}
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};
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static inline GMatDesc empty_gmat_desc() { return GMatDesc{-1,-1,{-1,-1}}; }
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namespace gapi { namespace detail {
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/** Checks GMatDesc fields if the passed matrix is a set of n-dimentional points.
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@param in GMatDesc to check.
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@param n expected dimensionality.
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@return the amount of points. In case input matrix can't be described as vector of points
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of expected dimensionality, returns -1.
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*/
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int checkVector(const GMatDesc& in, const size_t n);
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/** @overload
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Checks GMatDesc fields if the passed matrix can be described as a set of points of any
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dimensionality.
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@return array of two elements in form of std::vector<int>: the amount of points
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and their calculated dimensionality. In case input matrix can't be described as vector of points,
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returns {-1, -1}.
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*/
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std::vector<int> checkVector(const GMatDesc& in);
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}} // namespace gapi::detail
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#if !defined(GAPI_STANDALONE)
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GAPI_EXPORTS GMatDesc descr_of(const cv::UMat &mat);
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#endif // !defined(GAPI_STANDALONE)
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//Fwd declarations
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namespace gapi { namespace own {
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class Mat;
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GAPI_EXPORTS GMatDesc descr_of(const Mat &mat);
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}}//gapi::own
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GAPI_EXPORTS GMatDesc descr_of(const RMat &mat);
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#if !defined(GAPI_STANDALONE)
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GAPI_EXPORTS GMatDesc descr_of(const cv::Mat &mat);
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#else
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using gapi::own::descr_of;
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#endif
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/** @} */
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GAPI_EXPORTS std::ostream& operator<<(std::ostream& os, const cv::GMatDesc &desc);
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} // namespace cv
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#endif // OPENCV_GAPI_GMAT_HPP
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