XnStatus XnFrameStream::CreateStreamData(XnStreamData** ppStreamData)
{
XnStatus nRetVal = XN_STATUS_OK;
XnStreamData* pStreamData;
// we create a StreamData object with no buffer allocated. The buffer will just be
// a pointer to the triple buffer
nRetVal = XnStreamDataCreateNoBuffer(&pStreamData, GetName());
XN_IS_STATUS_OK(nRetVal);
// However, we don't want the user to get a null pointer, even if no new frame yet,
// so we'll initialize the data with one of the buffers
nRetVal = m_pBufferPool->GetBuffer(&pStreamData->pInternal->pLockedBuffer);
if (nRetVal != XN_STATUS_OK)
{
XnStreamDataDestroy(&pStreamData);
return (nRetVal);
}
pStreamData->pData = (void*)pStreamData->pInternal->pLockedBuffer->GetData();
*ppStreamData = pStreamData;
return (XN_STATUS_OK);
}
XN_DDK_API XnStatus XnStreamDataCreate(XnStreamData** ppStreamOutput, const XnChar* StreamName, XnUInt32 nAllocSize)
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = XnStreamDataCreateNoBuffer(ppStreamOutput, StreamName);
XN_IS_STATUS_OK(nRetVal);
XnStreamData* pStreamOutput = *ppStreamOutput;
// allocate buffer
nRetVal = XnStreamDataUpdateSize(pStreamOutput, nAllocSize);
if (nRetVal != XN_STATUS_OK)
{
XnStreamDataDestroy(ppStreamOutput);
return nRetVal;
}
return (XN_STATUS_OK);
}
XnStatus XnFrameStream::CreateStreamData(XnStreamData** ppStreamData)
{
XnStatus nRetVal = XN_STATUS_OK;
XnStreamData* pStreamData;
// NOTE: in any case, we must make sure data is not null, because some old applications
// counts on it (they might read the data before the first frame).
// check if the buffer pool has been set yet
if (m_pBufferPool == NULL)
{
// Create it with a buffer. This buffer will be later on freed when buffers from
// the buffer pool will be used.
nRetVal = XnStreamDataCreate(&pStreamData, GetName(), GetRequiredDataSize());
XN_IS_STATUS_OK(nRetVal);
}
else
{
// we create a StreamData object with no buffer allocated. The buffer will just be
// a pointer from the buffer pool
nRetVal = XnStreamDataCreateNoBuffer(&pStreamData, GetName());
XN_IS_STATUS_OK(nRetVal);
// take a buffer from the pool
nRetVal = m_pBufferPool->GetBuffer(&pStreamData->pInternal->pLockedBuffer);
if (nRetVal != XN_STATUS_OK)
{
XnStreamDataDestroy(&pStreamData);
return (nRetVal);
}
pStreamData->pData = (void*)pStreamData->pInternal->pLockedBuffer->GetData();
}
*ppStreamData = pStreamData;
return (XN_STATUS_OK);
}
