In generic wrapper technology, added a variable to remember if the us…

…er changed the input or the output channels. Depending on the choice, the strategy is different

sources/jvxComponents/jvxAudioTechnologies/jvxAuTGenericWrapper/src/CjvxGenericWrapperDevice.cpp

@@ -1110,6 +1110,7 @@ CjvxGenericWrapperDevice::test_chain_master(JVX_CONNECTION_FEEDBACK_TYPE(fdb))
 		updateSWSamplerateAndBuffersize_nolock(NULL, NULL JVX_CONNECTION_FEEDBACK_CALL_A(fdb));
 		res = CjvxAudioDevice::test_chain_master(JVX_CONNECTION_FEEDBACK_CALL(fdb));
 	}
+
 	return res;
 }
 
@@ -1342,6 +1343,7 @@ CjvxGenericWrapperDevice::test_connect_icon_core(JVX_CONNECTION_FEEDBACK_TYPE(fd
 					updateDependentVariables_lock(CjvxAudioDevice_genpcg::properties_active.outputchannelselection.globalIdx,
 						CjvxAudioDevice_genpcg::properties_active.outputchannelselection.category, false,
 						JVX_PROPERTY_CALL_PURPOSE_INTERNAL_PASS);
+
 					res = JVX_NO_ERROR;
 				}
 				else
@@ -1491,7 +1493,19 @@ CjvxGenericWrapperDevice::transfer_backward_ocon(jvxLinkDataTransferType tp, jvx
 		// Consider channels separately
 		if (theLocDescr->con_params.number_channels <= runtime.channelMappings.inputChannelMapper.size())
 		{
-		  int delta = JVX_SIZE_INT32(params.chans_in) - JVX_SIZE_INT32(theLocDescr->con_params.number_channels);
+			if (lastOperationSetup == jvxLastOperationChannels::JVXLASTOPERATIONCHANNELS_INPUT)
+			{
+				std::string txt = __FUNCTION__;
+				txt += ": ";
+				txt += ": Not willing to allow ";
+				txt += jvx_size2String(theLocDescr->con_params.number_channels);
+				txt += " input channels. The value of ";
+				txt += jvx_size2String(runtime.channelMappings.inputChannelMapper.size());
+				txt += " channels has recently been specified.";
+				JVX_CONNECTION_FEEDBACK_SET_ERROR_STRING(fdb, txt.c_str(), JVX_ERROR_INVALID_SETTING);
+				return JVX_ERROR_COMPROMISE;
+			}
+			int delta = JVX_SIZE_INT32(params.chans_in) - JVX_SIZE_INT32(theLocDescr->con_params.number_channels);
 
 			while (delta < 0)
 			{

sources/jvxComponents/jvxAudioTechnologies/jvxAuTGenericWrapper/src/CjvxGenericWrapperDevice.h

@@ -59,6 +59,12 @@ class CjvxGenericWrapperDevice: public JVX_MY_BASE_CLASS_D,
 	} oneDbgMeasureEvent;
 #endif
 
+	enum class jvxLastOperationChannels
+	{
+		JVXLASTOPERATIONCHANNELS_OUTPUT,
+		JVXLASTOPERATIONCHANNELS_INPUT
+	};
+
 	enum class jvxStatePrepapration
 	{
 		JVX_GENERIC_WRAPPER_PREPARE_STATUS_INIT_BF = 0x1,
@@ -150,6 +156,8 @@ class CjvxGenericWrapperDevice: public JVX_MY_BASE_CLASS_D,
 		CjvxGenericWrapperDummyChannels theDummy;
 	} dummyRefs;
 
+	jvxLastOperationChannels lastOperationSetup = jvxLastOperationChannels::JVXLASTOPERATIONCHANNELS_OUTPUT;
+
 	struct
 	{
 		struct

sources/jvxComponents/jvxAudioTechnologies/jvxAuTGenericWrapper/src/CjvxGenericWrapperDevice_prepare_subfunctions.cpp

@@ -668,14 +668,28 @@ jvxErrorType
 CjvxGenericWrapperDevice::prepare_detectmode()
 {
 	jvxErrorType res = JVX_NO_ERROR;
-
+	jvxCBool allowOperateZeroChannels = c_false;
+	if (onInit.connectedDevice)
+	{
+		IjvxProperties* props = reqInterface<IjvxProperties>(onInit.connectedDevice);
+		if (props)
+		{
+			jvxCallManagerProperties callGate;
+			jPAD ident("/allow_operate_zero_channels");
+			props->get_property(callGate, jPRIO<jvxCBool>(allowOperateZeroChannels), ident);
+			retInterface<IjvxProperties>(onInit.connectedDevice, props);
+			props = nullptr;
+		}
+	}
 	// =========================================================================
 	// Determine the operation modes
 	// =========================================================================
 	if(res == JVX_NO_ERROR)
 	{
 		// INPUT
-		if(processingControl.inProc.params_fixed_runtime.chanshw_in == 0)
+		if(
+			(processingControl.inProc.params_fixed_runtime.chanshw_in == 0) &&
+			!allowOperateZeroChannels)			
 		{
 			proc_fields.seq_operation_in = NOTHING;
 		}

sources/jvxComponents/jvxAudioTechnologies/jvxAuTGenericWrapper/src/CjvxGenericWrapperDevice_props.cpp

@@ -1636,6 +1636,7 @@ CjvxGenericWrapperDevice::set_property(jvxCallManagerProperties& callGate,
 						elm->lastModCnt = runtime.channelMappings.modifyWeightCnt++;
 					}
 				}
+				lastOperationSetup = jvxLastOperationChannels::JVXLASTOPERATIONCHANNELS_INPUT;
 			}
 		}
 
@@ -1657,6 +1658,7 @@ CjvxGenericWrapperDevice::set_property(jvxCallManagerProperties& callGate,
 						elm->lastModCnt = runtime.channelMappings.modifyWeightCnt++;
 					}
 				}
+				lastOperationSetup = jvxLastOperationChannels::JVXLASTOPERATIONCHANNELS_OUTPUT;
 			}
 		}