Method Init

Source/Modules/nimCodecs/XnJpegCodec.cpp:70–117

}

XnStatus XnJpegCodec::Init(const ProductionNode& node)
{
	XnStatus nRetVal = XN_STATUS_OK;

	nRetVal = XnCodec::Init(node);
	XN_IS_STATUS_OK(nRetVal);

	if (node.GetInfo().GetDescription().Type != XN_NODE_TYPE_IMAGE)
	{
		XN_LOG_ERROR_RETURN(XN_STATUS_BAD_PARAM, XN_MASK_OPEN_NI, "Codec JPEG requires an image node!");
	}

	strcpy(m_strNodeName, node.GetName());

	ImageGenerator image(node);
	image.GetContext(m_context);

	// register for changes in resolution or cropping
	nRetVal = image.RegisterToMapOutputModeChange(NodeConfigurationChangedCallback, this, m_hOutputModeCallback);
	XN_IS_STATUS_OK_LOG_ERROR("Register to map output mode change", nRetVal);

	if (image.IsCapabilitySupported(XN_CAPABILITY_CROPPING))
	{
		nRetVal = image.GetCroppingCap().RegisterToCroppingChange(NodeConfigurationChangedCallback, this, m_hCroppingCallback);
		XN_IS_STATUS_OK_LOG_ERROR("Register to cropping change", nRetVal);
	}

	// now init
	nRetVal = XnStreamInitCompressImageJ(&m_CompJPEGContext);
	XN_IS_STATUS_OK_LOG_ERROR("Init image compressor", nRetVal);

	nRetVal = XnStreamInitUncompressImageJ(&m_UncompJPEGContext);
	if (nRetVal != XN_STATUS_OK)
	{
		xnLogError(XN_MASK_OPEN_NI, "Init image uncompressor");
		XnStreamFreeCompressImageJ(&m_CompJPEGContext);
		return (nRetVal);
	}

	m_image = image;

	nRetVal = OnNodeConfigurationChanged();
	XN_IS_STATUS_OK_LOG_ERROR("Handle node configuration change", nRetVal);

	m_bValid = TRUE;

	return (XN_STATUS_OK);
}

XnFloat XnJpegCodec::GetWorseCompressionRatio() const
{