XnStatus XnFileDevice::Init()
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = XnStreamDataCreate(&m_pStreamData, "", XN_FILE_MAX_UNCOMPRESSED_DATA_SIZE);
XN_IS_STATUS_OK(nRetVal);
return (XN_STATUS_OK);
}
XnStatus XnStreamReaderStream::Init()
{
XnStatus nRetVal = XN_STATUS_OK;
nRetVal = XnDeviceStream::Init();
XN_IS_STATUS_OK(nRetVal);
// register for size change (so we can realloc stream data)
nRetVal = RequiredSizeProperty().OnChangeEvent().Register(RequiredSizeChangedCallback, this);
XN_IS_STATUS_OK(nRetVal);
// and create stream data
nRetVal = XnStreamDataCreate(&m_pLastData, GetName(), GetRequiredDataSize());
XN_IS_STATUS_OK(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);
}
XnStatus XnDeviceStream::CreateStreamData(XnStreamData** ppStreamData)
{
return XnStreamDataCreate(ppStreamData, GetName(), GetRequiredDataSize());
}