- Extended CastDeviceCapability and created DeviceType

- Corrected JavaDoc and reduced thread idle timeout

Author: Nadahar

src/main/java/org/digitalmediaserver/cast/CastDevice.java

@@ -598,8 +598,8 @@ public void disconnect() throws IOException {
 	}
 
 	/**
-	 * @return {@code true} if the associated {@link Channel} is closed,
-	 *         {@code false} if it's open.
+	 * @return {@code true} if the associated {@link Channel} is open,
+	 *         {@code false} if it's closed.
 	 */
 	public boolean isConnected() {
 		return !channel.isClosed();
@@ -1095,7 +1095,7 @@ protected static ExecutorService createExecutor() {
 		ThreadPoolExecutor result = new ThreadPoolExecutor(
 			0,
 			Integer.MAX_VALUE,
-			300L,
+			60L,
 			TimeUnit.SECONDS,
 			new SynchronousQueue<Runnable>(true),
 			new ThreadFactory() {

src/main/java/org/digitalmediaserver/cast/CastDeviceCapability.java

@@ -45,8 +45,26 @@ public enum CastDeviceCapability {
 	/** The cast device supports or is in (?) development mode */
 	DEV_MODE(1 << 4),
 
-	/** The cast device supports multizone groups */
-	MULTIZONE_GROUP(1 << 5);
+	/** The device is a multizone group */
+	MULTIZONE_GROUP(1 << 5),
+
+	/** The device is a dynamic group */
+	DYNAMIC_GROUP(1 << 6),
+
+	/** The device is a multichannel group */
+	MULTI_CHANNEL_GROUP(1 << 7),
+
+	/** The device is a multichannel member */
+	MULTI_CHANNEL_MEMBER(1 << 8),
+
+	/** The device has master or fixed volume mode capability */
+	MASTER_OR_FIXED_VOLUME(1 << 11),
+
+	/** The device has attenuation or fixed volume mode capability */
+	ATTENUATION_OR_FIXED_VOLUME(1 << 12),
+
+	/** The device can be part of a dynamic group */
+	DYNAMIC_GROUPING_SUPPORTED(1 << 16);
 
 	private final int mask;
 

src/main/java/org/digitalmediaserver/cast/message/enumeration/DeviceType.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2025 Digital Media Server developers.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.digitalmediaserver.cast.message.enumeration;
+
+import java.util.Locale;
+import javax.annotation.Nullable;
+import org.digitalmediaserver.cast.util.Util;
+import com.fasterxml.jackson.annotation.JsonCreator;
+
+/**
+ * This represents the type of cast device.
+ *
+ * @author Nadahar
+ */
+public enum DeviceType {
+
+	/** Generic Cast device */
+	GENERIC,
+
+	/** Cast-enabled TV */
+	TV,
+
+	/** Cast-enabled speaker or other audio device */
+	SPEAKER,
+
+	/** Speaker group */
+	SPEAKER_GROUP,
+
+	/** The "Nearby Devices" pseudo-device, which represents any nearby unpaired guest-mode devices */
+	NEARBY_UNPAIRED;
+
+	/**
+	 * Parses the specified string and returns the corresponding
+	 * {@link DeviceType}, or {@code null} if no match could be found.
+	 *
+	 * @param deviceType the string to parse.
+	 * @return The resulting {@link DeviceType} or {@code null}.
+	 */
+	@Nullable
+	@JsonCreator
+	public static DeviceType typeOf(String deviceType) {
+		if (Util.isBlank(deviceType)) {
+			return null;
+		}
+		String typeString = deviceType.toUpperCase(Locale.ROOT).replace(' ', '_');
+		for (DeviceType type : values()) {
+			if (typeString.equals(type.name())) {
+				return type;
+			}
+		}
+		return null;
+	}
+}