Method onMessage

src/midi.cpp:52–77

}

void InputDevice::onMessage(const Message& message) {
	for (Input* input : subscribed) {
		// Filter channel if message is not a system MIDI message
		if (message.getStatus() != 0xf && input->channel >= 0 && message.getChannel() != input->channel)
			continue;

		// We're probably in the MIDI driver's thread, so set the Rack context.
		contextSet(input->context);

		// Set timestamp to now if unset
		if (message.getFrame() < 0) {
			Message msg = message;
			double deltaTime = system::getTime() - APP->engine->getBlockTime();
			int64_t deltaFrames = std::floor(deltaTime * APP->engine->getSampleRate());
			// Delay message by current Engine block size
			deltaFrames += APP->engine->getBlockFrames();
			msg.setFrame(APP->engine->getBlockFrame() + deltaFrames);
			// Pass message to Input port
			input->onMessage(msg);
		}
		else {
			// Pass message to Input port
			input->onMessage(message);
		}
	}
}

void OutputDevice::subscribe(Output* output) {
	subscribed.insert(output);