MythTV: BlankFrameDetector.h Source File

00001 /*
00002  * BlankFrameDetector
00003  *
00004  * Detect blank frames based on histogram analysis.
00005  */
00006 
00007 #ifndef __BLANKFRAMEDETECTOR_H__
00008 #define __BLANKFRAMEDETECTOR_H__
00009 
00010 #include "FrameAnalyzer.h"
00011 
00012 typedef struct AVPicture AVPicture;
00013 class HistogramAnalyzer;
00014 class TemplateMatcher;
00015 
00016 class BlankFrameDetector : public FrameAnalyzer
00017 {
00018 public:
00019     /* Ctor/dtor. */
00020     BlankFrameDetector(HistogramAnalyzer *ha, QString debugdir);
00021 
00022     /* FrameAnalyzer interface. */
00023     const char *name(void) const { return "BlankFrameDetector"; }
00024     enum analyzeFrameResult MythPlayerInited(MythPlayer *player,
00025             long long nframes);
00026     enum analyzeFrameResult analyzeFrame(const VideoFrame *frame,
00027             long long frameno, long long *pNextFrame);
00028     int finished(long long nframes, bool final);
00029     int reportTime(void) const;
00030     FrameMap GetMap(unsigned int index) const
00031         { return (index) ? blankMap : breakMap; }
00032 
00033     /* BlankFrameDetector interface. */
00034     const FrameAnalyzer::FrameMap *getBlanks(void) const { return &blankMap; }
00035     int computeForLogoSurplus(const TemplateMatcher *tm);
00036     int computeForLogoDeficit(const TemplateMatcher *tm);
00037     int computeBreaks(FrameMap *breaks);
00038 
00039 private:
00040     HistogramAnalyzer       *histogramAnalyzer;
00041     float                   fps;
00042 
00043     FrameAnalyzer::FrameMap blankMap;
00044     FrameAnalyzer::FrameMap breakMap;
00045 
00046     /* Debugging */
00047     int                     debugLevel;
00048 };
00049 
00050 #endif  /* !__BLANKFRAMEDETECTOR_H__ */
00051 
00052 /* vim: set expandtab tabstop=4 shiftwidth=4: */