SceneChangeDetector.h

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/*
 * SceneChangeDetector
 *
 * Detect scene changes based on histogram analysis.
 */

#ifndef __SCENECHANGEDETECTOR_H__
#define __SCENECHANGEDETECTOR_H__

#include "FrameAnalyzer.h"

typedef struct AVPicture AVPicture;
class HistogramAnalyzer;

class SceneChangeDetector : public FrameAnalyzer
{
public:
    /* Ctor/dtor. */
    SceneChangeDetector(HistogramAnalyzer *ha, QString debugdir);
    ~SceneChangeDetector(void);

    /* FrameAnalyzer interface. */
    const char *name(void) const { return "SceneChangeDetector"; }
    enum analyzeFrameResult nuppelVideoPlayerInited(NuppelVideoPlayer *nvp,
            long long nframes);
    enum analyzeFrameResult analyzeFrame(const VideoFrame *frame,
            long long frameno, long long *pNextFrame);
    int finished(long long nframes, bool final);
    int reportTime(void) const;

    /* SceneChangeDetector interface. */
    const FrameAnalyzer::FrameMap *getChanges(void) const { return &changeMap; }

    typedef struct scenechange_data {
        unsigned char   color;
        unsigned char   frequency;
    } SceneChangeData[UCHAR_MAX + 1];

private:
    HistogramAnalyzer       *histogramAnalyzer;
    float                   fps;

    /* per-frame info */
    SceneChangeData         *scdata;
    unsigned short          *scdiff;

    FrameAnalyzer::FrameMap changeMap;

    /* Debugging */
    int                     debugLevel;
    QString                 debugdata;              /* filename */
    bool                    debug_scenechange;
    bool                    scenechange_done;
};

#endif  /* !__SCENECHANGEDETECTOR_H__ */

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