BlankFrameDetector.h

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/*
 * BlankFrameDetector
 *
 * Detect blank frames based on histogram analysis.
 */
 
#ifndef BLANKFRAMEDETECTOR_H
#define BLANKFRAMEDETECTOR_H
 
#include "FrameAnalyzer.h"
 
class HistogramAnalyzer;
class TemplateMatcher;
 
class BlankFrameDetector : public FrameAnalyzer
{
public:
    /* Ctor/dtor. */
    BlankFrameDetector(std::shared_ptr<HistogramAnalyzer> ha, const QString& debugdir);
 
    /* FrameAnalyzer interface. */
    const char *name(void) const override // FrameAnalyzer
        { return "BlankFrameDetector"; }
    enum analyzeFrameResult MythPlayerInited(MythPlayer *player,
            long long nframes) override; // FrameAnalyzer
    enum analyzeFrameResult analyzeFrame(const MythVideoFrame *frame,
            long long frameno, long long *pNextFrame) override; // FrameAnalyzer
    int finished(long long nframes, bool final) override; // FrameAnalyzer
    int reportTime(void) const override; // FrameAnalyzer
    FrameMap GetMap(unsigned int index) const override // FrameAnalyzer
        { return (index) ? m_blankMap : m_breakMap; }
 
    /* BlankFrameDetector interface. */
    const FrameAnalyzer::FrameMap *getBlanks(void) const { return &m_blankMap; }
    int computeForLogoSurplus(const TemplateMatcher *templateMatcher);
    static int computeForLogoDeficit(const TemplateMatcher *templateMatcher);
    int computeBreaks(FrameMap *breaks);
 
private:
    std::shared_ptr<HistogramAnalyzer> m_histogramAnalyzer;
    float                   m_fps        {0.0F};
 
    FrameAnalyzer::FrameMap m_blankMap;
    FrameAnalyzer::FrameMap m_breakMap;
 
    /* Debugging */
    int                     m_debugLevel {0};
};
 
#endif  /* !BLANKFRAMEDETECTOR_H */
 
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