include/FCam/AsyncFile.h

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#ifndef FCAM_ASYNCFILE_H
#define FCAM_ASYNCFILE_H

#include <queue>
#include <semaphore.h>
#include <string>
#include <pthread.h>

#include "Frame.h"


namespace FCam {

    class Lens;
    class Flash;

    class AsyncFileWriter {
      public:
        AsyncFileWriter();
        ~AsyncFileWriter();

        void saveDNG(Frame, std::string filename);
        void saveDNG(Image, std::string filename);

        void saveJPEG(Frame, std::string filename, int quality = 75);
        void saveJPEG(Image, std::string filename, int quality = 75);

        void saveDump(Frame, std::string filename);
        void saveDump(Image, std::string filename);

        int savesPending() {return pending;}        

        void cancel();

      private:

        friend void *launch_async_file_writer_thread_(void *);
        
        struct SaveRequest {
            // only one of these two things should be defined
            Frame frame;
            Image image;

            std::string filename;
            enum {DNGFrame = 0, JPEGFrame, JPEGImage, DumpFrame, DumpImage} fileType;
            int quality;
        };

        std::queue<SaveRequest> saveQueue;
        pthread_mutex_t saveQueueMutex;
        sem_t *saveQueueSemaphore;

        bool running, stop;
        pthread_t thread;

        void run();

        int pending;
    };

}

#endif