FastReadStream.h
上传用户:tuheem
上传日期:2007-05-01
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文件大小:1k
- // VirtualDub - Video processing and capture application
- // Copyright (C) 1998-2001 Avery Lee
- //
- // This program is free software; you can redistribute it and/or modify
- // it under the terms of the GNU General Public License as published by
- // the Free Software Foundation; either version 2 of the License, or
- // (at your option) any later version.
- //
- // This program is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- //
- // You should have received a copy of the GNU General Public License
- // along with this program; if not, write to the Free Software
- // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- #ifndef f_VIRTUALDUB_FASTREADSTREAM_H
- #define f_VIRTUALDUB_FASTREADSTREAM_H
- #include <windows.h>
- class FastReadStreamHeader;
- class FastReadStream {
- public:
- FastReadStream(HANDLE hFile, long lBlockCount, long lBlockSize);
- FastReadStream(int iFile, long lBlockCount, long lBlockSize);
- ~FastReadStream();
- bool Ready();
- long Read(int stream, __int64 i64Pos, void *pBuffer, long lBytes);
- void Flush();
- private:
- HANDLE hFile;
- int iFile;
- long lBlockCount;
- long lBlockSize;
- long lHistory;
- FastReadStreamHeader *pHeaders;
- void *pBuffer;
- void _Init(long lBlockCount, long lBlockSize);
- int _PickVictim(int stream);
- int _Commit(int stream, __int64 i64BlockNo);
- };
- #endif