StimBuff: Make virtual so we can dynamic_cast in getOrCreateStimBuff

stimBuffApis/livoxGen1/livoxGen1.cpp

@@ -30,6 +30,8 @@ static SmoThreadingModelDesc smoThreadingModelDesc;
 // Local collection of stimulus producers
 static std::vector<std::shared_ptr<StimulusProducer>> attachedStimulusProducers;
 
+static bool isSupportedQualeIfaceApi(const std::string& qualeIfaceApi);
+
 // Check if a StimulusProducer matches the requested stim feature
 static bool isProducerForStimFeature(
 	const std::shared_ptr<StimulusProducer>& stimProducer,
@@ -192,6 +194,17 @@ private:
 			return false;
 		}
 
+		// Check for duplicate qualeIfaceApi
+		const std::string& qualeIfaceApi = context->spec->qualeIfaceApi;
+		if (context->stimProducer->hasBufferWithQualeIfaceApi(qualeIfaceApi))
+		{
+			std::cerr << __func__ << ": Buffer with qualeIfaceApi '"
+				<< qualeIfaceApi << "' already exists for this producer. "
+				"Each producer can only have one buffer per qualeIfaceApi."
+				<< std::endl;
+			return false;
+		}
+
 		// Parse histbuffMs
 		int histbuffMs = parseHistbuffMs(context->spec);
 
@@ -203,7 +216,7 @@ private:
 			std::cerr << __func__ << ": Failed to create StimBuffer: "
 				<< e.what() << ". Producer is committed, DeviceReattacher will retry."
 				<< std::endl;
-			// Return false so DeviceReattacher can retry later
+			// Return false so caller can handle error callback
 			return false;
 		}
 
@@ -604,6 +617,13 @@ static const StimBuffApiDesc livoxGen1ApiDesc = {
 	}
 };
 
+static bool isSupportedQualeIfaceApi(const std::string& qualeIfaceApi)
+{
+	// Check if this is a supported (implemented) qualeIfaceApi
+	return qualeIfaceApi == "mesh" || qualeIfaceApi == "pcloudIntensity" ||
+		qualeIfaceApi == "pcloudAmbience";
+}
+
 // Callback function implementations
 extern "C" int livoxGen1_initializeInd(void)
 {
@@ -713,6 +733,29 @@ extern "C" void livoxGen1_attachDeviceReq(
 			"not available");
 	}
 
+	// Validate qualeIfaceApi
+	const std::string& qualeIfaceApi = desc->qualeIfaceApi;
+	if (qualeIfaceApi == "gyro" || qualeIfaceApi == "accel")
+	{
+		// These are for ImuStimulusProducer (not yet implemented)
+		std::cerr << __func__ << ": qualeIfaceApi '" << qualeIfaceApi
+			<< "' requires ImuStimulusProducer which is not yet implemented"
+			<< std::endl;
+		cb.callbackFn(false, desc);
+		return;
+	}
+
+	if (!isSupportedQualeIfaceApi(qualeIfaceApi))
+	{
+		// Unknown qualeIfaceApi
+		std::cerr << __func__ << ": Unsupported qualeIfaceApi '"
+			<< qualeIfaceApi << "' for LivoxGen1. "
+			"Supported values: mesh, pcloudIntensity, pcloudAmbience"
+			<< std::endl;
+		cb.callbackFn(false, desc);
+		return;
+	}
+
 	auto request = std::make_shared<AttachDeviceReq>(desc, cb);
 
 	// Case 1: Check if StimBuffer already exists
@@ -740,7 +783,23 @@ extern "C" void livoxGen1_attachDeviceReq(
 		}
 		else
 		{
-			// StimProducer exists, StimBuffer doesn't
+			/**	EXPLANATION:
+			 * StimProducer exists, StimBuffer doesn't (DASpec doesn't match)
+			 * Check if producer already has a buffer with the requested
+			 * qualeIfaceApi but different DASpec - this is not allowed.
+			 */
+			if (stimProducer->hasBufferWithQualeIfaceApi(desc->qualeIfaceApi))
+			{
+				std::cerr << __func__ << ": Producer already has a buffer with "
+					"qualeIfaceApi '" << desc->qualeIfaceApi
+					<< "' but with a different DeviceAttachmentSpec. "
+					"A single LivoxGen1 device cannot support multiple DASpecs "
+					"with the same qualeIfaceApi." << std::endl;
+
+				cb.callbackFn(false, desc);
+				return;
+			}
+
 			request->stimProducer = stimProducer;
 			// Ensure StimBuffer is attached and enable pcloud data if needed
 			request->attachDeviceReq4_doCreateStimBuff_maybeDirectlyCalled(