LazyFrameSource.h

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/** A WCT component which is a source of frames which it produces
 * by also being an art::Event visitor.
 *
 * Lazy means that there is a delay between conversion of the short
 * int samples of the raw::RawDigit and the float samples of
 * IFrame/ITrace.  This can help memory usage if a subset of the
 * frame is processed serially.
 */

#ifndef LARWIRECELL_COMPONENTS_LAZYFRAMESOURCE
#define LARWIRECELL_COMPONENTS_LAZYFRAMESOURCE

#include "larwirecell/Interfaces/IArtEventVisitor.h"
#include "WireCellIface/IFrameSource.h"
#include "WireCellIface/IConfigurable.h"

#include "canvas/Utilities/InputTag.h"

#include <string>
#include <vector>
#include <deque>

namespace wcls {
    class LazyFrameSource : public IArtEventVisitor,
                           public WireCell::IFrameSource,
                           public WireCell::IConfigurable {
    public:
        LazyFrameSource();
        virtual ~LazyFrameSource();

        /// IArtEventVisitor
        virtual void visit(art::Event & event);

        /// IFrameSource
        virtual bool operator()(WireCell::IFrame::pointer& frame);

        /// IConfigurable
        virtual WireCell::Configuration default_configuration() const;
        virtual void configure(const WireCell::Configuration& config);

    private:
        std::deque<WireCell::IFrame::pointer> m_frames;
        art::InputTag m_inputTag;
        double m_tick;
        int m_nticks;
        std::vector<std::string> m_frame_tags;

    };

}

#endif