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VideoPlayerListener.h

Go to the documentation of this file.

#ifndef Impala_Application_SDash_VideoPlayerListener_h
#define Impala_Application_SDash_VideoPlayerListener_h

#include <string>
#include <vector>

#include "Visualization/Video.h"
#include "Visualization/VideoJpgPlayer.h"
#include "Visualization/VideoJpgPlayerListener.h"

#include "Core/Geometry/Rectangle.h"

#include "Application/sdash/VideoPlayerView.h"
#include "Application/sdash/RegionsOfInterestInfo.h"

namespace Impala {
namespace Application {
namespace SDash {

// Listening to the Inspect VideoPlayer.

class VideoPlayerListener : public Visualization::VideoJpgPlayerListener
{

public:

    typedef Visualization::VideoJpgPlayer            VideoJpgPlayer;
    typedef Visualization::VideoJpgPlayerListener    VideoJpgPlayerListener;
    typedef Core::Geometry::Rectangle Rectangle;

    VideoPlayerListener(
        const std::vector<Visualization::Video>& videos, 
        const RegionsOfInterestInfo& detectedPersons)
        : mVideos(videos), mDetectedPersons(detectedPersons)
    {
    }

    virtual void OnNewFrame(VideoJpgPlayer *src, int frameNr, void* userData)
    {
        VideoPlayerView* theView = (VideoPlayerView*) userData;

        static const int imageWidth = theView->GetImage()->w;
        static const int imageHeight = theView->GetImage()->h;
        static const float scale = (float) imageHeight / (float) mDetectedPersons.GetFrameHeight();

        std::vector<RegionsOfInterestInfo::ScaledRegion> regions;
        if (!mVideos[mVideoId].IsMovementFrame(frameNr))
            regions = mDetectedPersons.GetRoisScaled(mVideoId, frameNr, scale); // SK: correct for frame start nr
        //else
        //    printf("no roi's displayed for movement frame %i of video %i\n", frameNr, mVideoId);

        // normalize every frame once (and not on every display event!)
        int nrOfRegions = regions.size();
        for (int i = 0; i < nrOfRegions; i++)
        {
            RegionsOfInterestInfo::ScaledRegion& region = regions[i];
            region.left = region.left / imageWidth;
            region.top = region.top / imageHeight;
            region.width = region.width / imageWidth;
            region.height = region.height / imageHeight;
        }

        theView->SetVideoId(mVideoId);
        theView->SetFrameNr(frameNr);
        theView->SetRegionsOfInterest(regions);
        theView->SetRoiNr(-1);
    }

    void SetVideo(int videoId)
    {
        mVideoId = videoId;
    }

private:

    int mVideoId;

    const std::vector<Visualization::Video>& mVideos;
    const RegionsOfInterestInfo& mDetectedPersons;

}; //class VideoPlayerListener


} // namespace SDash
} // namespace Application
} // namespace Impala

#endif

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