seekable_frame_importer.h

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#ifndef MF_SEEKABLE_FRAME_IMPORTER_H_
#define MF_SEEKABLE_FRAME_IMPORTER_H_

#include "frame_importer.h"
#include "../common.h"
#include "../ndarray/ndcoord.h"
#include "../ndarray/ndarray_view.h"

namespace mf {



template<std::size_t Dim, typename Elem>
class seekable_frame_importer : public frame_importer<Dim, Elem> {
    using base = frame_importer<Dim, Elem>;
    
protected:
    seekable_frame_importer(const ndsize<Dim>& frame_shape) :
        base(frame_shape) { }

public:
    using typename base::frame_view_type;
    constexpr static bool is_seekable = true;
    
    virtual time_unit current_time() const = 0;
    virtual time_unit total_duration() const = 0;
    
    virtual void seek(time_unit) = 0;
    
    void read_frame_at(const frame_view_type& vw, time_unit t) {
        this->seek(t);
        this->read_frame(vw);
    }
};


}

#endif