Video Streaming Sample Code

This sample code reads a file and renders it to a primary DirectDraw surface.

#include <stdio.h>
#include "ddraw.h"       // DirectDraw interfaces
#include "mmstream.h"    // multimedia stream interfaces
#include "amstream.h"    // DirectShow multimedia stream interfaces
#include "ddstream.h"    // DirectDraw multimedia stream interfaces

void RenderStreamToSurface(IDirectDrawSurface *pSurface, 
    IMultiMediaStream *pMMStream)
{    
    IMediaStream *pPrimaryVidStream;    
    IDirectDrawMediaStream *pDDStream;
    IDirectDrawStreamSample *pSample;
    RECT rect;
    DDSURFACEDESC ddsd;

    pMMStream->GetMediaStream(MSPID_PrimaryVideo, &pPrimaryVidStream);
    pPrimaryVidStream->QueryInterface(IID_IDirectDrawMediaStream, (void **)&pDDStream);
    ddsd.dwSize = sizeof(ddsd);
    pDDStream->GetFormat(&ddsd, NULL, NULL, NULL);
    rect.top = rect.left = 0;
    rect.bottom = ddsd.dwHeight;
    rect.right = ddsd.dwWidth;
    pDDStream->CreateSample(pSurface, &rect, 0, &pSample);

    pMMStream->SetState(STREAMSTATE_RUN);
    while (pSample->Update(0, NULL, NULL, NULL) == S_OK);
    pMMStream->SetState(STREAMSTATE_STOP);

    pSample->Release();    
    pDDStream->Release();
    pPrimaryVidStream->Release();
}

void RenderFileToMMStream(const char * szFileName, 
    IMultiMediaStream **ppMMStream,
    IDirectDraw *pDD)
{    
    IAMMultiMediaStream *pAMStream;
    CoCreateInstance(CLSID_AMMultiMediaStream, NULL, CLSCTX_INPROC_SERVER,
        IID_IAMMultiMediaStream, (void **)&pAMStream);
    WCHAR    wPath[MAX_PATH];        // wide (32-bit) string name
    MultiByteToWideChar(CP_ACP, 0, szFileName, -1, wPath,
        sizeof(wPath)/sizeof(wPath[0]));    

    pAMStream->Initialize(STREAMTYPE_READ, AMMSF_NOGRAPHTHREAD, NULL);
    pAMStream->AddMediaStream(pDD, &MSPID_PrimaryVideo, 0, NULL);
    pAMStream->AddMediaStream(NULL, &MSPID_PrimaryAudio, AMMSF_ADDDEFAULTRENDERER, NULL);
    pAMStream->OpenFile(wPath, 0);    
    *ppMMStream = pAMStream;
}

int _CRTAPI1 main(int argc, char *argv[])    
{    
    if (argc < 2) {
    printf("Usage : showstrm movie.ext\n");
    exit(0);}    

    DDSURFACEDESC ddsd;
    IDirectDraw *pDD;    
    IDirectDrawSurface *pPrimarySurface;
    IMultiMediaStream *pMMStream;

    CoInitialize(NULL);
    
    DirectDrawCreate(NULL, &pDD, NULL);
    pDD->SetCooperativeLevel(GetDesktopWindow(), DDSCL_NORMAL);
    ddsd.dwSize = sizeof(ddsd);
    ddsd.dwFlags = DDSD_CAPS;
    ddsd.ddsCaps.dwCaps = DDSCAPS_PRIMARYSURFACE;
    pDD->CreateSurface(&ddsd, &pPrimarySurface, NULL);
    RenderFileToMMStream(argv[1], &pMMStream, pDD);
    RenderStreamToSurface(pPrimarySurface, pMMStream);    
    pMMStream->Release();
    pPrimarySurface->Release();    
    pDD->Release(); 
    
    CoUninitialize();
    return 0;
}