#1670 Resolves missing audio segments for some DMR Cap+ call events.

DSheirer · Oct 15, 2023 · b391ebb · b391ebb
1 parent bad5a1f
commit b391ebb
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diff --git a/src/main/java/io/github/dsheirer/module/decode/dmr/audio/DMRAudioModule.java b/src/main/java/io/github/dsheirer/module/decode/dmr/audio/DMRAudioModule.java
@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 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
@@ -38,7 +38,6 @@
 import io.github.dsheirer.module.decode.dmr.message.data.lc.full.AbstractVoiceChannelUser;
 import io.github.dsheirer.module.decode.dmr.message.data.lc.full.FullLCMessage;
 import io.github.dsheirer.module.decode.dmr.message.data.terminator.Terminator;
-import io.github.dsheirer.module.decode.dmr.message.type.ServiceOptions;
 import io.github.dsheirer.module.decode.dmr.message.voice.VoiceEMBMessage;
 import io.github.dsheirer.module.decode.dmr.message.voice.VoiceMessage;
 import io.github.dsheirer.preference.UserPreferences;
@@ -105,64 +104,55 @@ public void receive(IMessage message)
     {
         if(hasAudioCodec() && message.getTimeslot() == getTimeslot())
         {
-            //DCDM doesn't provide FLCs or EMBs ... assume that the call is unencrypted.
-            if(!mEncryptedCallStateEstablished && message instanceof VoiceMessage vm &&
-                    vm.getSyncPattern().isDirectMode())
+            //Attempt to set the audio encryption state from certain types of messages
+            if(!mEncryptedCallStateEstablished)
             {
-                mEncryptedCallStateEstablished = true;
-                mEncryptedCall = false;
-                List<byte[]> frames = vm.getAMBEFrames();
-                for(byte[] frame: frames)
+                //DCDM doesn't provide FLCs or EMBs ... assume that the call is unencrypted.
+                if(message instanceof VoiceMessage vm && vm.getSyncPattern().isDirectMode())
                 {
-                    processAudio(frame, message.getTimestamp());
+                    mEncryptedCallStateEstablished = true;
+                    mEncryptedCall = false;
                 }
-            }
-            //Both Motorola and Hytera signal their Basic Privacy (BP) scrambling in some of the Voice B-F frames
-            //in the EMB field.
-            else if(!mEncryptedCallStateEstablished && message instanceof VoiceEMBMessage voiceMessage)
-            {
-                if(voiceMessage.getEMB().isValid())
+                //Both Motorola and Hytera signal their Basic Privacy (BP) scrambling in some of the Voice B-F frames
+                //in the EMB field.
+                else if(message instanceof VoiceEMBMessage voiceMessage && voiceMessage.getEMB().isValid())
                 {
                     mEncryptedCallStateEstablished = true;
                     mEncryptedCall = voiceMessage.getEMB().isEncrypted();
                 }
+                else if(message instanceof VoiceHeader voiceHeader)
+                {
+                    LCMessage lc = voiceHeader.getLCMessage();
 
-                List<byte[]> frames = voiceMessage.getAMBEFrames();
-                for(byte[] frame: frames)
+                    if(lc instanceof FullLCMessage flc) //We know it is, but this null checks as well
+                    {
+                        if(flc.isValid())
+                        {
+                            mEncryptedCallStateEstablished = true;
+                            mEncryptedCall = flc.isEncrypted();
+                        }
+                    }
+                }
+                //Note: the DMRMessageProcessor extracts Full Link Control messages from Voice Frames B-C and sends them
+                // independent of any DMR Burst messaging.  When encountered, it can be assumed that they are part of
+                // an ongoing call and can be used to establish encryption state when the FLC is a voice channel user.
+                else if(message instanceof AbstractVoiceChannelUser avcu)
                 {
-                    processAudio(frame, message.getTimestamp());
+                    mEncryptedCallStateEstablished = true;
+                    mEncryptedCall = avcu.getServiceOptions().isEncrypted();
                 }
             }
-            else if(message instanceof VoiceMessage voiceMessage)
+
+            //Queue or process audio frames.  Note: audio frames are held/queued until encrypted state is established
+            //before any audio is generated for the audio segment.
+            if(message instanceof VoiceMessage voiceMessage)
             {
                 List<byte[]> frames = voiceMessage.getAMBEFrames();
                 for(byte[] frame: frames)
                 {
                     processAudio(frame, message.getTimestamp());
                 }
             }
-            else if(!mEncryptedCallStateEstablished && message instanceof VoiceHeader voiceHeader)
-            {
-                LCMessage lc = voiceHeader.getLCMessage();
-
-                if(lc instanceof FullLCMessage flc) //We know it is, but this null checks as well
-                {
-                    if(flc.isValid())
-                    {
-                        mEncryptedCallStateEstablished = true;
-                        mEncryptedCall = flc.isEncrypted();
-                    }
-                }
-            }
-            //Note: the DMRMessageProcess extracts Full Link Control messages from Voice Frames B-C and sends them
-            // independent of any DMR Burst messaging.  When encountered, it can be assumed that they are part of
-            // an ongoing call and can be used to establish encryption state when the FLC is a voice channel user.
-            else if(!mEncryptedCallStateEstablished && message instanceof AbstractVoiceChannelUser avcu)
-            {
-                ServiceOptions serviceOptions = avcu.getServiceOptions();
-                mEncryptedCallStateEstablished = true;
-                mEncryptedCall = serviceOptions.isEncrypted();
-            }
             else if(message instanceof Terminator)
             {
                 reset();

diff --git a/...sheirer/module/decode/dmr/message/data/lc/full/motorola/CapacityPlusVoiceChannelUser.java b/...sheirer/module/decode/dmr/message/data/lc/full/motorola/CapacityPlusVoiceChannelUser.java
@@ -21,13 +21,13 @@
 
 import io.github.dsheirer.bits.CorrectedBinaryMessage;
 import io.github.dsheirer.module.decode.dmr.message.IServiceOptionsProvider;
-import io.github.dsheirer.module.decode.dmr.message.data.lc.full.FullLCMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.lc.full.AbstractVoiceChannelUser;
 import io.github.dsheirer.module.decode.dmr.message.type.CapacityPlusServiceOptions;
 
 /**
  * Any Capacity Plus Voice Channel User link control message that contains vendor-specific service options.
  */
-public abstract class CapacityPlusVoiceChannelUser extends FullLCMessage implements IServiceOptionsProvider
+public abstract class CapacityPlusVoiceChannelUser extends AbstractVoiceChannelUser implements IServiceOptionsProvider
 {
     private static final int[] SERVICE_OPTIONS = new int[]{16, 17, 18, 19, 20, 21, 22, 23};
     //Reed Solomon FEC: 72-95