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 * * 00012 * * 00013 * For more information visit the ViTooKi homepage: * 00014 * http://ViTooKi.sourceforge.net * 00015 * vitooki-user@lists.sourceforge.net * 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 * 00020 * modify it under the terms of the GNU General Public License * 00021 * as published by the Free Software Foundation; either version 2 * 00022 * of the License, or (at your option) any later version. * 00023 * * 00024 * This program is distributed in the hope that it will be useful, * 00025 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00026 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00027 * GNU General Public License for more details. * 00028 * * 00029 * You should have received a copy of the GNU General Public License * 00030 * along with this program; if not, write to the Free Software * 00031 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, * 00032 * MA 02111-1307, USA. * 00033 * * 00034 ***********************************************************************/ 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