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DevNull.hpp

00001  /***********************************************************************
00002  *                                                                      *
00003  * ViTooKi                                                              *
00004  *                                                                      *
00005  * title:       DevNull.hpp                                                   *
00006  *                                                                      *
00007  *                                                                      *
00008  *                                                                      *
00009  * ITEC institute of the University of Klagenfurt (Austria)             *
00010  * http://www.itec.uni-klu.ac.at                                        *
00011  *                                                                      *
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00016  * vitooki-devel@lists.sourceforge.net                                  *
00017  *                                                                      *
00018  * This file is part of ViTooKi, a free video toolkit.                  *
00019  * ViTooKi is free software; you can redistribute it and/or             *
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00021  * as published by the Free Software Foundation; either version 2       *
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00035 
00036  /***********************************************************************
00037  *                                                                      *
00038  *  REVISION HISTORY:                                                   *
00039  *                                                                      *
00040  *                                                                      *
00041  *                                                                      *
00042  ***********************************************************************/
00043 
00044 #ifndef _PS_DEVNULL_HPP
00045 #define _PS_DEVNULL_HPP
00046 
00047 #include "../IO.hpp"
00048 
00060 class DevNull:public IO {
00061 
00062 public:
00063         DevNull():IO() {
00064                 strcpy(url, "/dev/null");
00065         };
00066         
00071         virtual Frame *getFrame() {
00072 #ifdef _POSIX_PRIORITY_SCHEDULING
00073                 sched_yield(); //this is necessary to give parallel getFrames a chance
00074 #endif
00075                 return NULL;
00076         };
00077         
00079         virtual int writeFrame(Frame * frm, ESInfo *out_es=NULL) {
00080 #ifdef _POSIX_PRIORITY_SCHEDULING
00081                 sched_yield(); //this is necessary to give parallel getFrames a chance
00082 #endif
00083                 return 1;
00084         };
00085 
00089         virtual bool open() {
00090                 state=OPEN;
00091                 return true;
00092         };
00093 
00094         virtual bool close(bool immediate=false) {
00095                 state=CLOSED;
00096                 immediate = immediate;
00097                 return true;
00098         };
00099 
00103         virtual bool destroy() {
00104                 return true;
00105         };
00106  
00108         virtual int getBufferFillLevel() const {
00109                 return 50;
00110         };
00111   
00113         void setESInfo(ESInfo * es) { es = es; };
00114 
00115         ESInfo* getESInfo() { return NULL;};
00116         
00118         virtual const char *getURL() const {
00119                 return url;
00120         };
00121         
00129         virtual bool setToFrameNumber(u32 frameNumber) {
00130                 frameNumber = frameNumber;
00131                 return false;
00132         };
00133   
00134 protected:
00135         char url[12];
00136 };
00137 
00138 #endif