StimulusBuffer should take ref to parent; not sh_ptr to common instance

stimBuffApis/livoxGen1/pcloudAmbienceStimulusBuffer.h

@@ -18,12 +18,12 @@ class PcloudAmbienceStimulusBuffer
 {
 public:
 	explicit PcloudAmbienceStimulusBuffer(
-		std::shared_ptr<StimulusProducer>& producer,
+		StimulusProducer& parent,
 		const std::shared_ptr<device::DeviceAttachmentSpec>& deviceAttachmentSpec,
 		int histbuffMs,
 		const SpMcRingBuffer::InputEngineConstraints& ringBufferConstraints)
 	:	StimulusBuffer(
-			producer, deviceAttachmentSpec, histbuffMs, ringBufferConstraints)
+			parent, deviceAttachmentSpec, histbuffMs, ringBufferConstraints)
 	{}
 
 	~PcloudAmbienceStimulusBuffer() = default;

stimBuffApis/livoxGen1/pcloudIStimulusBuffer.h

@@ -18,12 +18,12 @@ class PcloudIStimulusBuffer
 {
 public:
 	explicit PcloudIStimulusBuffer(
-		std::shared_ptr<StimulusProducer>& producer,
+		StimulusProducer& parent,
 		const std::shared_ptr<device::DeviceAttachmentSpec>& deviceAttachmentSpec,
 		int histbuffMs,
 		const SpMcRingBuffer::InputEngineConstraints& ringBufferConstraints)
 	:	StimulusBuffer(
-			producer, deviceAttachmentSpec, histbuffMs, ringBufferConstraints)
+			parent, deviceAttachmentSpec, histbuffMs, ringBufferConstraints)
 	{}
 
 	~PcloudIStimulusBuffer() = default;

stimBuffApis/livoxGen1/pcloudXyzStimulusBuffer.h

@@ -18,12 +18,12 @@ class PcloudXyzStimulusBuffer
 {
 public:
 	explicit PcloudXyzStimulusBuffer(
-		std::shared_ptr<StimulusProducer>& producer,
+		StimulusProducer& parent,
 		const std::shared_ptr<device::DeviceAttachmentSpec>& deviceAttachmentSpec,
 		int histbuffMs,
 		const SpMcRingBuffer::InputEngineConstraints& ringBufferConstraints)
 	:	StimulusBuffer(
-			producer, deviceAttachmentSpec, histbuffMs, ringBufferConstraints)
+			parent, deviceAttachmentSpec, histbuffMs, ringBufferConstraints)
 	{}
 
 	~PcloudXyzStimulusBuffer() = default;