Splitting an AVI File into a Multipage TIFF File Using ltmmSampleTarget for C

// define helper macros for using interfaces under C 
#ifndef COBJMACROS 
   #define COBJMACROS 
#endif 
 
#include "stdafx.h" 
// include the LEAD Multimedia TOOLKIT header 
#include "ltmm.h"  
#include "l_bitmap.h" 
// include amvideo.h for VIDEOINFOHEADER, available in the Visual Studio 6.0 or the DirectX SDK 
#include <amvideo.h> 
// includes for string handling 
#include <tchar.h>    
#include <wchar.h>    
#include <string.h> 
#include <stdio.h> 
 
///////////////////////////////////////////////////////////////// 
// AviToTIFF 
// Creates a multipage TIFF file from an AVI file 
// pszAviFile - source file name 
// pszOutputFile - the name of the output TIF file 
// nMaxFrames - maximum number of pages (frames) to append to the file 
// 
HRESULT AviToTIFF(LPCWSTR pszAviFile, L_CHAR* pszOutputFile, int nMaxFrames)  
{ 
   HRESULT hr;  
   IltmmConvert* pConvert = NULL;  
   IltmmSampleTarget* pSampleTarget = NULL;  
   IltmmMediaTypeDisp* pMediaType = NULL;  
   IltmmMediaSampleDisp* pMediaSample;  
   VARIANT varFormat;  
   VARIANT varBuffer;  
   VIDEOINFOHEADER* pVIH;  
   void* pBuffer;  
   BSTR bstr;  
   int n;  
   BITMAPHANDLE Bitmap;  
   L_INT nRet;  
 
   // initialize COM library 
   hr = CoInitialize(NULL);  
   if(FAILED(hr))  
      goto error;  
 
   // create the convert object 
   hr = CoCreateInstance(&CLSID_ltmmConvert, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmConvert, (void**) &pConvert);  
   if(FAILED(hr))  
      goto error;  
 
   // create the target object 
   hr = CoCreateInstance(&CLSID_ltmmSampleTarget, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmSampleTarget, (void**) &pSampleTarget);  
   if(FAILED(hr))  
      goto error;  
 
   // create the media type object 
   hr = CoCreateInstance(&CLSID_ltmmMediaType, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmMediaTypeDisp, (void**) &pMediaType);  
   if(FAILED(hr))  
      goto error;  
 
   // set type to MEDIATYPE_Video 
   bstr = SysAllocString(L"{73646976-0000-0010-8000-00AA00389B71}"); 
   hr = IltmmMediaTypeDisp_put_Type (pMediaType, bstr);  
   SysFreeString(bstr);  
   if(FAILED(hr))  
      goto error;  
 
   // set subtype to MEDIASUBTYPE_RGB24 
   bstr = SysAllocString(L"{e436eb7d-524f-11ce-9f53-0020af0ba770}"); 
   hr = IltmmMediaTypeDisp_put_Subtype (pMediaType, bstr);  
   SysFreeString(bstr);  
   if(FAILED(hr))  
      goto error;  
 
 
   // set the accepted media type 
   hr = IltmmSampleTarget_SetAcceptedMediaType(pSampleTarget, pMediaType);  
   if(FAILED(hr))  
      goto error;  
 
   // release the media type, since we don't need it anymore 
   IltmmMediaTypeDisp_Release(pMediaType);  
   pMediaType = NULL;  
 
   // set the convert input file name 
   bstr = SysAllocString(pszAviFile);  
   hr = IltmmConvert_put_SourceFile(pConvert, bstr);  
   SysFreeString(bstr);  
   if(FAILED(hr))  
      goto error;  
 
   // set the convert object target 
   hr = IltmmConvert_put_TargetObject(pConvert, (IUnknown*)pSampleTarget);  
   if(FAILED(hr))  
      goto error;  
 
   // start the conversion 
   hr = IltmmConvert_StartConvert(pConvert);  
   if(FAILED(hr))  
      goto error;  
 
   // get the connected media type 
   hr = IltmmSampleTarget_GetConnectedMediaType(pSampleTarget, &pMediaType);  
   if(FAILED(hr))  
      goto error;  
 
   // get the VIDEOINFOHEADER 
   hr = IltmmMediaTypeDisp_get_Format(pMediaType, &varFormat);  
   if(FAILED(hr))  
      goto error;  
 
   hr = SafeArrayAccessData(V_ARRAY(&varFormat), (void**) &pVIH);  
   if(FAILED(hr))  
   { 
      VariantClear(&varFormat);  
      goto error;  
   } 
 
   // set the shell bitmap handle to match the sample data 
   nRet = L_CreateBitmap(&Bitmap,   
                         sizeof(BITMAPHANDLE),  
                         TYPE_USER, 
                         pVIH->bmiHeader.biWidth,  
                         abs(pVIH->bmiHeader.biHeight),  
                         pVIH->bmiHeader.biBitCount,  
                         ORDER_BGR,  
                         NULL,  
                         pVIH->bmiHeader.biHeight > 0 ? BOTTOM_LEFT : TOP_LEFT,  
                         NULL,  
                         pVIH->bmiHeader.biSizeImage);  
   if(nRet != SUCCESS)  
   { 
      hr = FAILURE;  
      // make sure the bitmap handle is initialized so L_FreeBitmap does not crash 
      L_InitBitmap(&Bitmap, sizeof(BITMAPHANDLE), 1, 1, 1);  
      goto converterror;  
   } 
 
   for(n = 0; n < 1 * nMaxFrames; n++) 
   { 
      // fetch a sample 
      hr = IltmmSampleTarget_GetSample(pSampleTarget, 1000, &pMediaSample);  
      if(FAILED(hr) || !pMediaSample)  
         break;  
      // access the image bits 
      hr = IltmmMediaSampleDisp_get_Buffer(pMediaSample, &varBuffer);  
      if(FAILED(hr))  
      { 
         IltmmMediaSampleDisp_Release(pMediaSample);  
         IltmmConvert_StopConvert(pConvert);  
         goto converterror;  
      } 
      hr = SafeArrayAccessData(V_ARRAY(&varBuffer), &pBuffer);  
      if(FAILED(hr))  
      { 
         VariantClear(&varBuffer);  
         IltmmMediaSampleDisp_Release(pMediaSample);  
         IltmmConvert_StopConvert(pConvert);  
         goto converterror;  
      } 
 
      // set the data pointer for the bitmap to be the sample 
      nRet = L_SetBitmapDataPointer(&Bitmap, (L_UCHAR*)pBuffer, pVIH->bmiHeader.biSizeImage);  
      if(nRet == SUCCESS)  
         // append a JPEG-compressed page to the output file 
         nRet = L_SaveFile(pszOutputFile, &Bitmap, FILE_TIF_JPEG_411, 0, 25, SAVEFILE_MULTIPAGE, NULL, NULL, NULL);  
 
      // release the sample 
      SafeArrayUnaccessData(V_ARRAY(&varBuffer));  
      VariantClear(&varBuffer);  
      IltmmMediaSampleDisp_Release(pMediaSample);  
 
      if(nRet != SUCCESS)  
      { 
         // an error occured - abort the process 
         hr = E_FAIL;  
         IltmmConvert_StopConvert(pConvert);  
         goto converterror;  
      } 
   } 
 
   // stop 
   hr = IltmmConvert_StopConvert(pConvert);  
   if(FAILED(hr))  
      goto converterror;  
 
   // cleanup and exit 
   hr = S_OK;  
converterror:  
   SafeArrayUnaccessData(V_ARRAY(&varFormat));  
   VariantClear(&varFormat);  
error:  
 
   if(pConvert)  
      IltmmConvert_Release(pConvert);  
   if(pSampleTarget)  
      IltmmSampleTarget_Release(pSampleTarget);  
   if(pMediaType)  
      IltmmMediaType_Release(pMediaType);  
   CoUninitialize(); 
 
   return hr;    
} 
 
void SplittingAVIFileIntoMultipageTIFFFileUsingltmmSampleTarget_Example ( ) 
{ 
   AviToTIFF((OLECHAR*)MAKE_MEDIA_PATH("count.avi"), MAKE_MEDIA_PATH("multi.tif"), 100);  
} 
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