Method sendMessage

src/rtmidi.cpp:145–164

	}

	void sendMessage(const midi::Message& message) override {
		// If frame is undefined, send message immediately
		if (message.getFrame() < 0) {
			sendMessageNow(message);
			return;
		}
		// Schedule message to be sent by worker thread
		MessageSchedule ms;
		ms.message = message;
		int64_t deltaFrames = message.getFrame() - APP->engine->getBlockFrame();
		// Delay message by current Engine block size
		deltaFrames += APP->engine->getBlockFrames();
		// Compute time in next Engine block to send message
		double deltaTime = deltaFrames * APP->engine->getSampleTime();
		ms.timestamp = APP->engine->getBlockTime() + deltaTime;

		std::lock_guard<decltype(mutex)> lock(mutex);
		messageQueue.push(ms);
		cv.notify_one();
	}

	// Consumer thread methods