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// Copyright (C) 2020-2022 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
//
#pragma once
#include <stddef.h>
#include <limits>
#include <memory>
#include <string>
#include <opencv2/core.hpp>
#include "utils/performance_metrics.hpp"
enum class read_type { efficient, safe };
class ImagesCapture {
public:
const bool loop;
ImagesCapture(bool loop) : loop{loop} {}
virtual double fps() const = 0;
virtual cv::Mat read() = 0;
virtual std::string getType() const = 0;
const PerformanceMetrics& getMetrics() {
return readerMetrics;
}
virtual ~ImagesCapture() = default;
protected:
PerformanceMetrics readerMetrics;
};
// An advanced version of
// try {
// return cv::VideoCapture(std::stoi(input));
// } catch (const std::invalid_argument&) {
// return cv::VideoCapture(input);
// } catch (const std::out_of_range&) {
// return cv::VideoCapture(input);
// }
// Some VideoCapture backends continue owning the video buffer under cv::Mat. safe_copy forses to return a copy from
// read()
// https://github.com/opencv/opencv/blob/46e1560678dba83d25d309d8fbce01c40f21b7be/modules/gapi/include/opencv2/gapi/streaming/cap.hpp#L72-L76
std::unique_ptr<ImagesCapture> openImagesCapture(
const std::string& input,
bool loop,
read_type type = read_type::efficient,
size_t initialImageId = 0,
size_t readLengthLimit = std::numeric_limits<size_t>::max(), // General option
cv::Size cameraResolution = {1280, 720}
);
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