VSourceOpenCv C++ lib. Video capture and video source control based on OpenCV
VSourceOpenCv C++ library version 1.1.1 provides video capture and video source control function based on OpenCV.
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Overview
VSourceOpenCv C++ library provides video capture and video source control function based on OpenCV (version >= 4.5). The library inherits interface from open source VSource interface class. VSource.h file contains data structures VSourceParams class (contains video source params and provides methods for serialization/deserialization params), VSourceCommand enum (describes video source action commands), VSourceParam enum (describes video source params) and includes VSourceLibCamera class declaration. VSourceOpenCv depends on: OpenCV (version >= 4.5), VSource interface class and open source Logger library which provides method to write logs. The library supports C++17 standard and provide simple interface.
Simple interface
class VSourceOpenCv : public VSource
{
public:
/// Get string of current library version.
static std::string getVersion();
/// Open video source.
bool openVSource(std::string& initString) override;
/// Init video source. All params will be set according to structure.
bool initVSource(VSourceParams& params) override;
/// Get open status.
bool isVSourceOpen() override;
/// Close video source.
void closeVSource() override;
/// Get new video frame.
bool getFrame(Frame& frame, int32_t timeoutMsec = 0) override;
/// Set video source param.
bool setParam(VSourceParam id, float value) override;
/// Get video source param value.
float getParam(VSourceParam id) override;
/// Get video source params.
void getParams(VSourceParams& params) override;
/// Execute command.
bool executeCommand(VSourceCommand id) override;
/// Decode and execute command.
bool decodeAndExecuteCommand(uint8_t* data, int size) override;
};
Simple example
#include <iostream>
#include "VSourceOpenCv.h"
// Entry point.
int main(void)
{
// Open camera with certain resolution.
cr::video::VSource* source = new cr::video::VSourceOpenCv();
if (source->openVSource("0;640;480"))
return -1;
// Main loop.
cr::video::Frame frame;
while (true)
{
// Wait new frame 1 sec.
if (!source->getFrame(frame, 1000)) {
std::cout << "No input frame" << std::endl;
continue;
}
// Prepare OpenCV frame to display.
cv::Mat openCvFrame(frame.height, frame.width, CV_8UC3, frame.data);
// Display frame.
cv::imshow("VIDEO", openCvFrame);
cv::waitKey(1);
}
return 1;
}
