From 788df1eda3fba006382175dcf08157ff9aa31121 Mon Sep 17 00:00:00 2001
From: f4exb <f4exb06@gmail.com>
Date: Fri, 5 Apr 2024 02:00:35 +0200
Subject: [PATCH] ChirpChat demod: auto message length for FT messages

---
 .../channelrx/demodchirpchat/chirpchatdemod.cpp   | 15 +++++++++++++++
 .../channelrx/demodchirpchat/chirpchatdemodgui.ui |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/plugins/channelrx/demodchirpchat/chirpchatdemod.cpp b/plugins/channelrx/demodchirpchat/chirpchatdemod.cpp
index cea13d828..387cb0601 100644
--- a/plugins/channelrx/demodchirpchat/chirpchatdemod.cpp
+++ b/plugins/channelrx/demodchirpchat/chirpchatdemod.cpp
@@ -327,6 +327,21 @@ bool ChirpChatDemod::handleMessage(const Message& cmd)
         m_lastMsgSyncWord = msg.getSyncWord();
         m_lastMsgTimestamp = msg.getMsgTimestamp();
         m_lastMsgString = msg.getMessage(); // for now we do not handle message components (call1, ...)
+        int nbSymbolBits = m_settings.m_spreadFactor - m_settings.m_deBits;
+        m_lastMsgNbSymbols = (174 / nbSymbolBits) + ((174 % nbSymbolBits) == 0 ? 0 : 1);
+
+        if (m_settings.m_autoNbSymbolsMax)
+        {
+            ChirpChatDemodSettings settings = m_settings;
+            settings.m_nbSymbolsMax = m_lastMsgNbSymbols;
+            applySettings(settings);
+
+            if (getMessageQueueToGUI()) // forward to GUI if any
+            {
+                MsgConfigureChirpChatDemod *msgToGUI = MsgConfigureChirpChatDemod::create(settings, false);
+                getMessageQueueToGUI()->push(msgToGUI);
+            }
+        }
 
         if (m_settings.m_sendViaUDP)
         {
diff --git a/plugins/channelrx/demodchirpchat/chirpchatdemodgui.ui b/plugins/channelrx/demodchirpchat/chirpchatdemodgui.ui
index 39d5ba3d3..b127dc8c4 100644
--- a/plugins/channelrx/demodchirpchat/chirpchatdemodgui.ui
+++ b/plugins/channelrx/demodchirpchat/chirpchatdemodgui.ui
@@ -723,7 +723,7 @@
       <item>
        <widget class="QCheckBox" name="messageLengthAuto">
         <property name="toolTip">
-         <string>Set message length in symbols automatically to provided message length (LoRa only)</string>
+         <string>Set message length in symbols automatically to provided message length (LoRa and FT only)</string>
         </property>
         <property name="text">
          <string>Auto</string>