MythTV: PGMConverter.h Source File

00001 /*
00002  * PGMConverter
00003  *
00004  * Object to convert a MythPlayer frame into a greyscale image.
00005  */
00006 
00007 #ifndef __PGMCONVERTER_H__
00008 #define __PGMCONVERTER_H__
00009 
00010 extern "C" {
00011 #include "libavcodec/avcodec.h"    /* AVPicture */
00012 }
00013 
00014 typedef struct VideoFrame_ VideoFrame;
00015 class MythPlayer;
00016 
00017 /*
00018  * PGM_CONVERT_GREYSCALE:
00019  *
00020  * If #define'd, perform a true greyscale conversion of "frame" in
00021  * PGMConverter::getImage .
00022  *
00023  * If #undef'd, just fake up a greyscale data structure. The "frame" data is
00024  * YUV data, and the Y channel is close enough for our purposes, and it's
00025  * faster than a full-blown true greyscale conversion.
00026  */
00027 #define PGM_CONVERT_GREYSCALE
00028 
00029 class PGMConverter
00030 {
00031 public:
00032     /* Ctor/dtor. */
00033     PGMConverter(void);
00034     ~PGMConverter(void);
00035 
00036     int MythPlayerInited(const MythPlayer *player);
00037     const AVPicture *getImage(const VideoFrame *frame, long long frameno,
00038             int *pwidth, int *pheight);
00039     int reportTime(void);
00040 
00041 private:
00042     long long       frameno;            /* frame number */
00043     int             width, height;      /* frame dimensions */
00044     AVPicture       pgm;                /* grayscale frame */
00045 #ifdef PGM_CONVERT_GREYSCALE
00046     struct timeval  convert_time;
00047     bool            time_reported;
00048 #endif /* PGM_CONVERT_GREYSCALE */
00049 };
00050 
00051 #endif  /* !__PGMCONVERTER_H__ */
00052 
00053 /* vim: set expandtab tabstop=4 shiftwidth=4: */