图像处理1VC6.0下directshow配置

注：网上转载，测试通过

 DirectShow开发环境配置及测试例程  

开发环境
SDK：DirectX9.0b (Summer 2003)
Visual C++ 6.0


参考文档：SDK文档
1) DirectShow->Getting Started->Setting Up the Build Environment
2) DirectShow->DirectShow Reference->DirectShow Base Classes->Using the DirectShow Base Classes
3) DirectShow->Getting Started->How To Play a File


测试例子：SDK文档
DirectShow->Getting Started->How To Play a File


配置说明：
1. Tools->Options->Directories
Include - 添加<SDK root>\Include
Lib       - 添加<SDK root>\Lib
            - 添加<SDK root>\SAMPLES\C++\DirectShow\BASECLASSES\DEBUG  // [注1]


2. Build BaseClasses
打开<SDK root>\Samples\C++\DirectShow\BaseClasses\baseclasses.dsp，编译debug得到Strmbasd.lib。 // [注2]


3. Project->Setting->Link
添加Strmbasd.lib


4. 添加头文件
#include <Dshow.h>        // 所有DirectShow应用程序必备
#include <Streams.h>      // 使用DirectShow基类


源代码如下，代码分析见参考文档3)
 #include <Dshow.h>
#include <Streams.h>
#include <stdio.h>


void main(void)
 {
    IGraphBuilder *pGraph = NULL;
    IMediaControl *pControl = NULL;
    IMediaEvent   *pEvent = NULL;


    // Initialize the COM library.
    HRESULT hr = CoInitialize(NULL);
    if (FAILED(hr))
     {
        printf("ERROR - Could not initialize COM library");
        return;
      }


    // Create the filter graph manager and query for interfaces.
    hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, 
                        IID_IGraphBuilder, (void **)&pGraph);
    if (FAILED(hr))
     {
        printf("ERROR - Could not create the Filter Graph Manager.");
        return;
     }


    hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
    hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent);


    // Build the graph. IMPORTANT: Change this string to a file on your system.
//    hr = pGraph->RenderFile(L"C:\\Example.avi", NULL);
    hr = pGraph->RenderFile(L"E:\\DX90SDK\\Samples\\Media\\chicken.wmv", NULL); 
    if (SUCCEEDED(hr))
     {
        // Run the graph.
        hr = pControl->Run();
        if (SUCCEEDED(hr))
        {
            // Wait for completion.
            long evCode;
            pEvent->WaitForCompletion(INFINITE, &evCode);


            // Note: Do not use INFINITE in a real application, because it
            // can block indefinitely.
        }
   }
    pControl->Release();
    pEvent->Release();
    pGraph->Release();
    CoUninitialize();
}


注1：该处可根据需要添加不同版本，如RELEASE/Debug_Unicode/Release_Unicode。
注2：debug - strmbasd.lib；release - strmbase.lib；另外还有对应的Unicode版本。
注3：步骤3缺，将导致
error LNK2001: unresolved external symbol _IID_IMediaEvent
error LNK2001: unresolved external symbol _IID_IMediaControl
error LNK2001: unresolved external symbol _CLSID_FilterGraph
error LNK2001: unresolved external symbol _IID_IGraphBuilder
Debug/Howtoplayafile.exe : fatal error LNK1120: 4 unresolved externals

Error executing link.exe.