directshow个人心得与见解（DirectShow personal experiences and insights）.doc

directshow个人心得与见解（DirectShow personal experiences and insights） What are 1 and DirectX? DirectX (short for: DX) is a Microsoft Windows based multimedia application interface APIs function. In development, DX is divided into two parts, one is the runtime, compiled by the DX program must have a runtime support, another is the development of libraries, it is often said that the SDK, which is part of the program is required to compile DX. DirectX is a graphical application programming interface (API), which is simply an auxiliary software, an accelerated software for improving system performance, created and developed by Microsoft. His meaning is not difficult to understand, Direct is the direct meaning, X is a lot of things, add together is a group of common things, this commonality is direct. Microsoft defines it as hardware device independence. DirectX is a graphic and media acceleration interface developed by Microsoft. Only by installing it, can the software in the system directly utilize hardware to accelerate resources (access to hardware at a high speed). The highest version of the software is 9.0c at present In the architecture of the Windows operating system, there is an abstraction layer between the kernel and the hardware, which shields the hardware so that the user is no longer allowed to access the hardware directly. After doing so, greatly improves the damage resistance and anti disturbance of the operating system, but it has so greatly reduced the efficiency of the hardware operation, many of the new features of new hardware can not be used directly, which is the development of the multimedia and the game is obviously an obstacle. DirectX is a Microsoft Corp providing a good application programming interface (APIs), for connection between the application program and the hardware itself, it is the development of Windows under the platform of multimedia applications and computer game play a key role. DirectX components include: DirectDraw, DirectSound, Dir