PcloudStimBuff: make OpenCL constraints explicit

stimBuffApis/livoxGen1/pcloudStimulusBuffer.cpp

@@ -9,6 +9,10 @@
 namespace smo {
 namespace stim_buff {
 
+// OpenCL kernels are used to collate and produce our StimFrames.
+static SpMcRingBuffer::InputEngineConstraints openClConstraints(
+	static_cast<size_t>(sysconf(_SC_PAGE_SIZE)), sizeof(void *));
+
 PcloudStimulusBuffer::PcloudStimulusBuffer(
 	const device::DeviceAttachmentSpec& deviceAttachmentSpec,
 	std::shared_ptr<livoxProto1::Device> &device,
@@ -17,8 +21,7 @@ PcloudStimulusBuffer::PcloudStimulusBuffer(
 :	StimulusBuffer(
 		deviceAttachmentSpec,
 		static_cast<size_t>((1000 * 30) / CONFIG_STIMBUFF_FRAME_PERIOD_MS),
-		SpMcRingBuffer::InputEngineConstraints(
-			static_cast<size_t>(sysconf(_SC_PAGE_SIZE)), 4),
+		openClConstraints,
 		device->componentThread->getIoService()),
 deviceAttachmentSpec(deviceAttachmentSpec), device(device),
 formatDesc(formatDesc), stagingBuffer(