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- // VirtualDub - Video processing and capture application
- // System library component
- // Copyright (C) 1998-2004 Avery Lee, All Rights Reserved.
- //
- // Beginning with 1.6.0, the VirtualDub system library is licensed
- // differently than the remainder of VirtualDub. This particular file is
- // thus licensed as follows (the "zlib" license):
- //
- // This software is provided 'as-is', without any express or implied
- // warranty. In no event will the authors be held liable for any
- // damages arising from the use of this software.
- //
- // Permission is granted to anyone to use this software for any purpose,
- // including commercial applications, and to alter it and redistribute it
- // freely, subject to the following restrictions:
- //
- // 1. The origin of this software must not be misrepresented; you must
- // not claim that you wrote the original software. If you use this
- // software in a product, an acknowledgment in the product
- // documentation would be appreciated but is not required.
- // 2. Altered source versions must be plainly marked as such, and must
- // not be misrepresented as being the original software.
- // 3. This notice may not be removed or altered from any source
- // distribution.
-
- #ifndef f_VD2_SYSTEM_FILEASYNC_H
- #define f_VD2_SYSTEM_FILEASYNC_H
-
- #ifdef _MSC_VER
- #pragma once
- #endif
-
- #include <vd2/system/vdtypes.h>
-
- class VDRTProfileChannel;
-
- class IVDFileAsync {
- public:
- enum Mode {
- kModeSynchronous, ///< Use synchronous I/O.
- kModeThreaded, ///< Use multithreaded I/O.
- kModeAsynchronous, ///< Use true asynchronous I/O (Windows NT only).
- kModeCount
- };
-
- virtual ~IVDFileAsync() {}
- virtual void SetPreemptiveExtend(bool b) = 0;
- virtual bool IsPreemptiveExtendActive() = 0;
- virtual bool IsOpen() = 0;
- virtual void Open(const wchar_t *pszFilename, uint32 count, uint32 bufferSize) = 0;
- virtual void Close() = 0;
- virtual void FastWrite(const void *pData, uint32 bytes) = 0;
- virtual void FastWriteEnd() = 0;
- virtual void Write(sint64 pos, const void *pData, uint32 bytes) = 0;
- virtual bool Extend(sint64 pos) = 0;
- virtual void Truncate(sint64 pos) = 0;
- virtual void SafeTruncateAndClose(sint64 pos) = 0;
- virtual sint64 GetFastWritePos() = 0;
- virtual sint64 GetSize() = 0;
- };
-
- IVDFileAsync *VDCreateFileAsync(IVDFileAsync::Mode);
-
- #endif
-