Add Port::getOffset() and setOffset().

include/audio.hpp

@@ -177,6 +177,9 @@ struct Port {
 	int getBlockSize();
 	void setBlockSize(int blockSize);
 
+	int getOffset();
+	void setOffset(int offset);
+
 	int getNumInputs();
 	int getNumOutputs();
 

src/app/AudioWidget.cpp

@@ -70,7 +70,7 @@ struct AudioDeviceValueItem : ui::MenuItem {
 	int offset;
 	void onAction(const event::Action& e) override {
 		port->setDeviceId(deviceId);
-		port->offset = offset;
+		port->setOffset(offset);
 	}
 };
 
@@ -99,7 +99,7 @@ static void appendAudioDeviceMenu(ui::Menu* menu, audio::Port* port) {
 			item->deviceId = deviceId;
 			item->offset = offset;
 			item->text = port->getDeviceDetail(deviceId, offset);
-			item->rightText = CHECKMARK(item->deviceId == port->getDeviceId() && item->offset == port->offset);
+			item->rightText = CHECKMARK(item->deviceId == port->getDeviceId() && item->offset == port->getOffset());
 			menu->addChild(item);
 		}
 	}
@@ -117,7 +117,7 @@ struct AudioDeviceChoice : LedDisplayChoice {
 		text = "";
 		if (box.size.x >= 200.0)
 			text += "Device: ";
-		std::string detail = (port && port->device) ? port->device->getDetail(port->offset, port->maxChannels) : "";
+		std::string detail = (port && port->device) ? port->device->getDetail(port->getOffset(), port->maxChannels) : "";
 		if (detail != "") {
 			text += detail;
 			color.a = 1.0;

src/audio.cpp

@@ -56,15 +56,15 @@ void Device::processBuffer(const float* input, int inputStride, float* output, i
 	for (Port* port : subscribed) {
 		// Setting the thread context should probably be the responsibility of Port, but because processInput() etc are overridden, this is the only good place for it.
 		contextSet(port->context);
-		port->processInput(input + port->offset, inputStride, frames);
+		port->processInput(input + port->getOffset(), inputStride, frames);
 	}
 	for (Port* port : subscribed) {
 		contextSet(port->context);
-		port->processBuffer(input + port->offset, inputStride, output + port->offset, outputStride, frames);
+		port->processBuffer(input + port->getOffset(), inputStride, output + port->getOffset(), outputStride, frames);
 	}
 	for (Port* port : subscribed) {
 		contextSet(port->context);
-		port->processOutput(output + port->offset, outputStride, frames);
+		port->processOutput(output + port->getOffset(), outputStride, frames);
 	}
 }
 
@@ -103,7 +103,7 @@ void Port::reset() {
 		firstDriverId = driverIds[0];
 
 	setDriverId(firstDriverId);
-	offset = 0;
+	setOffset(0);
 }
 
 Driver* Port::getDriver() {
@@ -312,11 +312,20 @@ void Port::setBlockSize(int blockSize) {
 	}
 }
 
+int Port::getOffset() {
+	return offset;
+}
+
+void Port::setOffset(int offset) {
+	this->offset = offset;
+}
+
+
 int Port::getNumInputs() {
 	if (!device)
 		return 0;
 	try {
-		return std::min(device->getNumInputs() - offset, maxChannels);
+		return std::min(device->getNumInputs() - getOffset(), maxChannels);
 	}
 	catch (Exception& e) {
 		WARN("Audio port could not get device number of inputs: %s", e.what());
@@ -328,7 +337,7 @@ int Port::getNumOutputs() {
 	if (!device)
 		return 0;
 	try {
-		return std::min(device->getNumOutputs() - offset, maxChannels);
+		return std::min(device->getNumOutputs() - getOffset(), maxChannels);
 	}
 	catch (Exception& e) {
 		WARN("Audio port could not get device number of outputs: %s", e.what());
@@ -347,7 +356,7 @@ json_t* Port::toJson() {
 
 	json_object_set_new(rootJ, "sampleRate", json_real(getSampleRate()));
 	json_object_set_new(rootJ, "blockSize", json_integer(getBlockSize()));
-	json_object_set_new(rootJ, "offset", json_integer(offset));
+	json_object_set_new(rootJ, "offset", json_integer(getOffset()));
 	return rootJ;
 }
 
@@ -385,7 +394,7 @@ void Port::fromJson(json_t* rootJ) {
 
 	json_t* offsetJ = json_object_get(rootJ, "offset");
 	if (offsetJ)
-		offset = json_integer_value(offsetJ);
+		setOffset(json_integer_value(offsetJ));
 }
 
 ////////////////////