Method CanGetFrame

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The method checks the ability to get data from AV object.

HRESULT CanGetFrame(
    [in] int nStream,
    [in] DWORD nWait
    );

Parameters:

nStream Number of stream
nWait   Response time in microseconds.

Returns:

S_OK                                 Object ready for get data
S_FALSE                              Object is busy
HRESULT_FROM_WIN32(ERROR_HANDLE_EOF) End of stream
E_INVALIDARG                         One or more arguments are invalid
E_FAIL                               Object not initialized yet or other failure.

Copy frames for all streams from source object to dest object

for(int n = 0; n < nStreams; n++)
{
  HRESULT hr = spDest->CanPutFrame(n, 0);
  if ( FAILED(hr) )
     return hr;
   else if (hr != S_OK)
     continue;
 
  hr = spSource->CanGetFrame(n, 0);
  if ( FAILED(hr) )
    return hr;
  else if (hr != S_OK)
    continue;
 
  DWORD cbActual = 0;
  REFERENCE_TIME tS = 0, tE = 0;
  DWORD dwFlags = 0;
 
  hr = spSource->GetFrame(n, m_pbBuffer, m_cbBuffer, &cbActual, &dwFlags, &tS, &tE, NULL);
  if (hr == S_OK)
  {
     hr = spDest->PutFrame(n, m_pbBuffer, cbActual, dwFlags, tS, tE, NULL);
  }
  else if (hr == HRESULT_FROM_WIN32(ERROR_HANDLE_EOF))
  {
     hr = spDest->PutFrame(n, NULL, 0, 0, 0, 0, NULL);
  }  
  if (FAILED(hr))
    return hr;
}