PcloudStimBuff: Add skeleton daemon; frame rate limiting

Basic implementation of the stimbuff mechanism's frame rate
limiting behaviour.

stimBuffApis/livoxGen1/pcloudStimulusBuffer.h

@@ -1,6 +1,10 @@
 #ifndef _LIVOX_GEN1_PCLOUD_STIMULUS_BUFFER_H
 #define _LIVOX_GEN1_PCLOUD_STIMULUS_BUFFER_H
 
+#include <config.h>
+#include <atomic>
+#include <boost/asio/deadline_timer.hpp>
+#include <spinLock.h>
 #include <user/stimulusBuffer.h>
 #include <user/stimFrame.h>
 #include <livoxProto1/device.h>
@@ -26,13 +30,7 @@ public:
 		const device::DeviceAttachmentSpec& deviceAttachmentSpec,
 		std::shared_ptr<livoxProto1::Device> &device,
 		const PcloudFormatDesc& formatDesc,
-		size_t nDgramsPerStagingBufferFrame)
-	:	StimulusBuffer(deviceAttachmentSpec),
-	deviceAttachmentSpec(deviceAttachmentSpec), device(device),
-	formatDesc(formatDesc), stagingBuffer(
-		StagingBuffer::InputEngineConstraints::ioUringConstraints,
-		OpenClConstraints(), nDgramsPerStagingBufferFrame)
-	{}
+		size_t nDgramsPerStagingBufferFrame);
 
 	~PcloudStimulusBuffer() = default;
 
@@ -42,12 +40,25 @@ public:
 	PcloudStimulusBuffer(PcloudStimulusBuffer&&) = default;
 	PcloudStimulusBuffer& operator=(PcloudStimulusBuffer&&) = default;
 
+	// Control methods
+	void start();
+	void stop();
+
 public:
 	device::DeviceAttachmentSpec deviceAttachmentSpec;
 	std::shared_ptr<livoxProto1::Device> device;
 	PcloudFormatDesc formatDesc;
 	StagingBuffer stagingBuffer;
 	IoUringAssemblyEngine ioUringAssemblyEngine;
+
+private:
+	std::atomic<bool> shouldContinue;
+	boost::asio::deadline_timer timer;
+	SpinLock frameAssemblyRateLimiter;
+
+private:
+	void scheduleNextTimeout(int delayMs = CONFIG_STIMBUFF_FRAME_PERIOD_MS);
+	void onTimeout(const boost::system::error_code& error);
 };
 
 } // namespace stim_buff