#7 NXDN Decoder support. Redesigns tuner and channel frequency error management. (#2431)

Closes #7 

NXDN Decoder

* Implements: NXDN4800, NXDN9600, Type-C and Type-D decoding and trunk tracking.
* Redesigns tuner and channel frequency error management.

src/main/java/io/github/dsheirer/identifier/Form.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2024 Dennis Sheirer
+ * Copyright (C) 2014-2025 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -30,6 +30,7 @@ public enum Form
     ARS_USER,
     ARS_PASSWORD,
     CALL_PROGRESS_TONE,
+    CATEGORY,
     CHANNEL,
     CHANNEL_DESCRIPTOR,
     CHANNEL_NAME,
@@ -49,6 +50,7 @@ public enum Form
     NETWORK_ACCESS_CODE,
     PATCH_GROUP,
     RADIO,
+    RAN,
     RF_SUBSYSTEM,
     SCRAMBLE_PARAMETERS,
     SHORT_DATA_MESSAGE,

src/main/java/io/github/dsheirer/identifier/alias/TalkerAliasManager.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2025 Dennis Sheirer
+ * Copyright (C) 2014-2026 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -48,9 +48,10 @@ public class TalkerAliasManager
     }
 
     /**
-     * Updates the alias for the
-     * @param identifier
-     * @param alias
+     * Updates the alias for the radio identifier
+     *
+     * @param identifier to update
+     * @param alias to assign to the radio identifier
      */
     public void update(RadioIdentifier identifier, TalkerAliasIdentifier alias)
     {

src/main/java/io/github/dsheirer/identifier/configuration/ChannelDescriptorConfigurationIdentifier.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2018 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2025 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,12 +14,12 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * *****************************************************************************
+ * ****************************************************************************
  */
 
 package io.github.dsheirer.identifier.configuration;
 
-import io.github.dsheirer.channel.IChannelDescriptor;
+import io.github.dsheirer.channel.IBandChannelDescriptor;
 import io.github.dsheirer.identifier.Form;
 import io.github.dsheirer.identifier.Identifier;
 import io.github.dsheirer.identifier.IdentifierClass;
@@ -31,12 +30,12 @@ import io.github.dsheirer.protocol.Protocol;
  * Configuration identifier that identifies a channel descriptor.   This is primarily used to broadcast the channel
  * descriptor for a traffic channel so that it is aware of what channel number and frequency it is decoding.
  */
-public class ChannelDescriptorConfigurationIdentifier extends Identifier<IChannelDescriptor>
+public class ChannelDescriptorConfigurationIdentifier extends Identifier<IBandChannelDescriptor>
 {
     /**
      * Constructs a channel descriptor configuration identifier
      */
-    public ChannelDescriptorConfigurationIdentifier(IChannelDescriptor value)
+    public ChannelDescriptorConfigurationIdentifier(IBandChannelDescriptor value)
     {
         super(value, IdentifierClass.CONFIGURATION, Form.CHANNEL_DESCRIPTOR, Role.ANY);
     }

src/main/java/io/github/dsheirer/identifier/encryption/EncryptionKeyIdentifier.java

@@ -30,7 +30,9 @@ import io.github.dsheirer.protocol.Protocol;
 
 public class EncryptionKeyIdentifier extends Identifier<EncryptionKey>
 {
-    public EncryptionKeyIdentifier(EncryptionKey value, IdentifierClass identifierClass, Form form, Role role)
+    private Protocol mProtocol;
+
+    public EncryptionKeyIdentifier(Protocol protocol, EncryptionKey value, IdentifierClass identifierClass, Form form, Role role)
     {
         super(value, identifierClass, form, role);
     }
@@ -38,7 +40,7 @@ public class EncryptionKeyIdentifier extends Identifier<EncryptionKey>
     @Override
     public Protocol getProtocol()
     {
-        return Protocol.APCO25;
+        return mProtocol;
     }
 
     public boolean isEncrypted()
@@ -46,8 +48,8 @@ public class EncryptionKeyIdentifier extends Identifier<EncryptionKey>
         return getValue() != null && getValue().isEncrypted();
     }
 
-    public static EncryptionKeyIdentifier create(EncryptionKey encryptionKey)
+    public static EncryptionKeyIdentifier create(Protocol protocol, EncryptionKey encryptionKey)
     {
-        return new EncryptionKeyIdentifier(encryptionKey, IdentifierClass.USER, Form.ENCRYPTION_KEY, Role.ANY);
+        return new EncryptionKeyIdentifier(protocol, encryptionKey, IdentifierClass.USER, Form.ENCRYPTION_KEY, Role.ANY);
     }
 }