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MPGStreamIO.hpp

00001 /***********************************************************************
00002  *                                                                      *
00003  * ViTooKi                                                              *
00004  *                                                                      *
00005  * title:       MPGStreamIO.hpp                                               *
00006  *                                                                      *
00007  *                                                                      *
00008  *                                                                      *
00009  * ITEC institute of the University of Klagenfurt (Austria)             *
00010  * http://www.itec.uni-klu.ac.at                                        *
00011  *                                                                      *
00012  *                                                                      *
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00017  *                                                                      *
00018  * This file is part of ViTooKi, a free video toolkit.                  *
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00035 
00036 /***********************************************************************
00037  *                                                                      *
00038  *  REVISION HISTORY:                                                   *
00039  *                                                                      *
00040  *                                                                      *
00041  *                                                                      *
00042  ***********************************************************************/
00043 
00044 #ifndef _PS_MPGSTREAMIO_HPP_
00045 #define _PS_MPGSTREAMIO_HPP_
00046 
00047 #include "IO.hpp"
00048 #include "global.hpp"
00049 class ESInfo;
00050 class Frame;
00051 class QIODevice;
00052 
00064 class MPGStreamIO:public IO {
00065 public:
00066         /* If writeonly is true only write access
00067          * is permitted, otherwise the file is read-only, url is deep-copied
00068          */
00069         MPGStreamIO(ESInfo * es, const char *file, bool writeOnly, bool omitHeader = false);
00070 
00071         virtual ~ MPGStreamIO();
00072 
00077         Frame *getFrame();
00078 
00080         int writeFrame(Frame * frm, ESInfo *out_es = NULL);
00081 
00085         bool open();
00086 
00087         bool close(bool immediate=false);
00088 
00090         bool destroy();
00091 
00093         int getBufferFillLevel() const {
00094                 return 50;
00095         };
00096 
00097         IO *clone() const;
00098 
00100         const char *getURL() const {
00101                 return url;
00102         };
00103 
00111   bool setToFrameNumber(u32 frameNumber);
00112         
00116         long setToClosestIFrame(u32 frameNumber, bool backwards);
00117         void setESInfo(ESInfo * esi) {es=esi;};
00118         ESInfo* getESInfo() { return es;};      
00119         
00120 private:
00121         bool saveHeader();
00122         bool readHeader();
00123         void writeHelpInfo(const Frame * frm);
00124 protected:
00125         FILE *io;
00126         char *url;
00127         bool writeOnly;
00128         ESInfo *es;
00129         bool atFileStart;
00130         FILE *helpFile;
00131         bool writeHelpFile;
00132         bool omitHeader;
00133         u32 lastCTSSeen;
00134 };
00135 
00136 #endif