• Blackmagic Design

  push source rate

  Posted by Hung Han on October 15, 2010 at 7:48 pm

  Hi

  I’m trying to paint on the PUSH SOURCE FILTER and i’m having a problem that i suspect it is the push source rate… do you know if i need to put a sleep in the loop? Because the output it is showing “t2-t1 = 0” frequently which does not make sense to me.

  
m_sResolution.width = 1920;
m_sResolution.height = 1080;
m_sResolution.bytes = 4; // ARGB

  BYTE* bmpBuffer=(BYTE*)GlobalAlloc(GPTR, uiDataSize);//allocate memory for image

  DWORD t1, t2
  HRESULT hr;

  while (true)
  {
  int i=0;
  for (; i < m_sResolution.width*m_sResolution.height*m_sResolution.bytes; ++i)
  {
  bmpBuffer[i] = rand();
  }

  t1 = GetTickCount();

  IMediaSample* pSample = NULL;
  hr = pIPushSourceVideo->GetFrameBuffer(&pSample);
  if (hr == S_OK)
  {
  BYTE* pData = NULL;
  hr = pSample->GetPointer(&pData);
  if (hr == S_OK)
  {
  memcpy(pData, bmpBuffer, Width * Height * 4);
  hr = pIPushSourceVideo->Deliver(pSample);
  }
  }

  t2 = GetTickCount();
  printf("t2-t1 = %lu", t2-t1);
  }

  GlobalFree(bmpBuffer);


  Regards
  Hung

  Hung Han replied 15 years, 9 months ago 1 Member · 0 Replies
• 0 Replies

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