Initial release

drivers/linux-rawmidi.js

@@ -0,0 +1,52 @@
+const path = require("node:path");
+const fs = require("node:fs");
+
+const midiDeviceRegExp = new RegExp("^midi[0-9]+$");
+
+let openDevice;
+let callback;
+
+module.exports = {
+	"list": function () {
+		var deviceNodeList = fs.readdirSync("/dev").filter(d => d.match(midiDeviceRegExp));
+
+		return deviceNodeList.map(d => path.join("/dev", d));
+	},
+	"open": function (device, eventCB) {
+		if (openDevice) {
+			openDevice["read"].close();
+			openDevice["write"].close();
+		}
+
+		var deviceName = path.basename(device);
+		var devicePath = path.join("/dev", deviceName);
+
+		openDevice = {
+			"read": fs.createReadStream(devicePath),
+			"write": fs.createWriteStream(devicePath)
+		};
+
+		if (eventCB) {
+			callback = eventCB;
+			openDevice.read.on("data", function (chunk) {
+				callback(chunk);
+			});
+		}
+	},
+	"send": function (message) {
+		if (!openDevice) return;
+
+		var data = Buffer.from(new Uint8Array(message));
+
+		openDevice["write"].write(data);
+	},
+	"close": function () {
+		if (!openDevice) return;
+
+		openDevice["read"].close();
+		openDevice["write"].close();
+
+		delete openDevice;
+		delete callback;
+	}
+};