图像处理1--VC6.0下directshow配置

悠悠 2022-06-17 21:00 147阅读 0赞

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.

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