media_helpers.hpp

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#ifndef ACMXVK_APP_MEDIA_HELPERS_HPP
#define ACMXVK_APP_MEDIA_HELPERS_HPP
 
#include "options.hpp"
 
#include <opencv2/core.hpp>
 
#include <condition_variable>
#include <cstdint>
#include <mutex>
#include <thread>
 
namespace mxvk {
    class VK_Capture;
}
 
namespace acmxvk {
    class LatestCameraFrame {
      public:
        LatestCameraFrame() = default;
        ~LatestCameraFrame();
        LatestCameraFrame(const LatestCameraFrame &) = delete;
        LatestCameraFrame &operator=(const LatestCameraFrame &) = delete;
        LatestCameraFrame(LatestCameraFrame &&) = delete;
        LatestCameraFrame &operator=(LatestCameraFrame &&) = delete;
 
        void start(mxvk::VK_Capture &source);
        void stop() noexcept;
        [[nodiscard]] bool takeLatest(cv::Mat &frame, bool wait_for_first);
 
      private:
        void captureLoop() noexcept;
 
        mxvk::VK_Capture *capture_source = nullptr;
        cv::Mat latest_frame;
        std::thread capture_thread;
        std::mutex frame_mutex;
        std::condition_variable frame_condition;
        std::uint64_t published_generation = 0;
        std::uint64_t consumed_generation = 0;
        bool stopping = true;
    };
} // namespace acmxvk
 
#endif