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BufferedHttpMPGStreamReader.hpp
00001 /*********************************************************************** 00002 * * 00003 * ViTooKi * 00004 * * 00005 * title: BufferedHttpMPGStreamReader.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_BUFFEREDHTTPMPGSTREAMREADER_HPP_ 00045 #define _PS_BUFFEREDHTTPMPGSTREAMREADER_HPP_ 00046 00047 #include "MPGStreamIO.hpp" 00048 #include "global.hpp" 00049 #include "net/HttpRequest.hpp" 00050 00051 #ifndef WIN32 00052 #include <netinet/in.h> 00053 #include <arpa/inet.h> 00054 #include <netdb.h> 00055 #include <sys/socket.h> 00056 #include <sys/types.h> 00057 #endif 00058 00059 class ESInfo; 00060 class Frame; 00061 class QIODevice; 00062 00063 #define SAFETYDIST 4 00064 #define STREAMREADER_DEF_BUFFER_SIZE 4096 00065 00066 00073 class BufferedHttpMPGStreamReader:public MPGStreamIO { 00074 public: 00075 00076 BufferedHttpMPGStreamReader(ESInfo * es, const char *file, bool writeOnly, bool omitHeader = false, 00077 int bufferSize = STREAMREADER_DEF_BUFFER_SIZE, int maxFrameSize = MAX_FRAME_SIZE); 00078 00079 virtual ~BufferedHttpMPGStreamReader(); 00080 00081 bool testFileopen(); 00082 00083 Frame *getFrame(); 00084 00085 static int getDefaultBufferSize() { return STREAMREADER_DEF_BUFFER_SIZE; }; //assume one kernel page for efficient reading 00086 00087 int writeFrame(const Frame * frm) { return 0; } 00088 00089 bool open(); 00090 00091 bool close(bool immediate=false); 00092 00093 bool destroy() { return false; }; 00094 00095 bool setToFrameNumber(u32 frameNumber) { return false; }; 00096 00097 long setToClosestIFrame(u32 frameNumber, bool backwards) { return 0; }; 00098 00099 u32 getContentLength() { return contentLength; }; 00100 00101 00102 private: 00103 00104 bool readBuffer(); 00105 int buffered_getc(); 00106 void goBack(int nrBytes); 00107 int buffered_read(u8 *buf, int nrBytes); 00108 int buffered_copy(u8 *buf, int nrBytes); 00109 void initBuffer(); 00110 00111 u8 *buffer; 00112 int bufferSize; 00113 int bytesBuffered, lastBytesBuffered; 00114 int bytesRead; 00115 int bytesReadTotal; 00116 bool bufferAtEnd; 00117 00118 HttpRequest *http; 00119 00120 u32 contentLength; 00121 char *contentStart; 00122 00123 int maxFrameSize; 00124 int DTS; 00125 }; 00126 00127 #endif