00001 //=========================================================================== 00002 //Copyright (C) 2003, 2004 Zentaro Kavanagh 00003 // 00004 //Redistribution and use in source and binary forms, with or without 00005 //modification, are permitted provided that the following conditions 00006 //are met: 00007 // 00008 //- Redistributions of source code must retain the above copyright 00009 // notice, this list of conditions and the following disclaimer. 00010 // 00011 //- Redistributions in binary form must reproduce the above copyright 00012 // notice, this list of conditions and the following disclaimer in the 00013 // documentation and/or other materials provided with the distribution. 00014 // 00015 //- Neither the name of Zentaro Kavanagh nor the names of contributors 00016 // may be used to endorse or promote products derived from this software 00017 // without specific prior written permission. 00018 // 00019 //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00020 //``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00021 //LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 00022 //PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ORGANISATION OR 00023 //CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00024 //EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00025 //PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00026 //PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00027 //LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00028 //NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00029 //SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00030 //=========================================================================== 00031 #pragma once 00032 00033 //This class will be a cache of a single media file. 00034 //It will only allow a single chunk of data to be cached... 00035 // ie you can't cache bytes 0-1000 and 2000-3000... 00036 // only consecutive blocks for now. 00037 // 00038 //Data can be read randomly... but only written sequentially. 00039 //Will act as a buffer so that data read off the network can be put straight 00040 // into the file and then read as needed. 00041 00042 #include <string> 00043 #include <fstream> 00044 using namespace std; 00045 class OGG_DEMUX_API SingleMediaFileCache 00046 { 00047 public: 00048 SingleMediaFileCache(void); 00049 ~SingleMediaFileCache(void); 00050 00051 bool open(string inFileName); 00052 void close(); 00053 bool write(const unsigned char* inBuff, unsigned long inBuffSize); 00054 unsigned long read(unsigned char* outBuff, unsigned long inBuffSize); 00055 bool readSeek(unsigned long inSeekPos); 00056 unsigned long totalBytes(); 00057 unsigned long bytesAvail(); 00058 00059 protected: 00060 fstream mLocalFile; 00061 00062 unsigned long mBytesWritten; 00063 unsigned long mReadPtr; 00064 00065 //fstream debugLog; 00066 bool mIsComplete; 00067 };