Extractor.h

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#ifndef EXTRACTOR_H
#define EXTRACTOR_H

#include <zmq.hpp>

#include <thread>
#include <string>
#include <list>

#include <utils.h>

class Extractor {
public:
    Extractor(zmq::context_t & _ctx, const PubSubEndpoint & _source, double _wantedFPS=0);
    virtual ~Extractor() = 0;
    void startServing();
    void stopServing();
    virtual std::string type() = 0;
    virtual std::string identifier() = 0;
    virtual std::list<std::string> parameters() = 0;
protected:
    zmq::context_t & ctx;
    PubSubEndpoint source;
    volatile bool keepGoing;
private:
    void extract();
    virtual void extractSetup();
    virtual void extractImpl(unsigned int width,
                             unsigned int height,
                             unsigned int bytesPerPixel,
                             uint64_t highResTime,
                             uint64_t wallTime,
                             zmq::message_t * sourceImage) = 0;
    virtual void extractTeardown();
    std::thread extractorThread;
    uint64_t nextFrameTime = 0;
    uint64_t wantedFrameTime;
};

#endif /* EXTRACTOR_H */