StimBuff: Make virtual so we can dynamic_cast in getOrCreateStimBuff

commonLibs/attachmentSupport/stimulusProducer.cpp

@@ -29,6 +29,28 @@ std::shared_ptr<StimulusBuffer> StimulusProducer::getAttachedStimulusBuffer(
 	return nullptr;
 }
 
+bool StimulusProducer::hasBufferWithQualeIfaceApi(
+	const std::string& qualeIfaceApi) const
+{
+	for (const auto& buffer : attachedStimulusBuffers)
+	{
+		if (!buffer || !buffer->deviceAttachmentSpec)
+		{
+			throw std::runtime_error(
+				"StimulusProducer::hasBufferWithQualeIfaceApi: encountered "
+				"null buffer or null deviceAttachmentSpec in "
+				"attachedStimulusBuffers (should never happen)");
+		}
+
+		if (buffer->deviceAttachmentSpec->qualeIfaceApi != qualeIfaceApi)
+			{ continue; }
+
+		return true;
+	}
+
+	return false;
+}
+
 void StimulusProducer::stop()
 {
 	{