Channel Tx plugins: added support of MIMO devices

plugins/channeltx/localsource/localsourcesettings.cpp

@@ -37,6 +37,7 @@ void LocalSourceSettings::resetToDefaults()
     m_filterChainHash = 0;
     m_channelMarker = nullptr;
     m_play = false;
+    m_streamIndex = 0;
     m_useReverseAPI = false;
     m_reverseAPIAddress = "127.0.0.1";
     m_reverseAPIPort = 8888;
@@ -57,6 +58,7 @@ QByteArray LocalSourceSettings::serialize() const
     s.writeU32(11, m_reverseAPIChannelIndex);
     s.writeU32(12, m_log2Interp);
     s.writeU32(13, m_filterChainHash);
+    s.writeS32(14, m_streamIndex);
 
     return s.final();
 }
@@ -96,6 +98,7 @@ bool LocalSourceSettings::deserialize(const QByteArray& data)
         d.readU32(12, &tmp, 0);
         m_log2Interp = tmp > 6 ? 6 : tmp;
         d.readU32(13, &m_filterChainHash, 0);
+        d.readS32(14, &m_streamIndex, 0);
 
         return true;
     }